diff --git a/.eslintrc.js b/.eslintrc.js
index d8a779d41..f9ee93327 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -139,6 +139,7 @@ module.exports =
 		'no-sparse-arrays': 2,
 		'no-this-before-super': 2,
 		'no-throw-literal': 2,
+		'no-trailing-spaces': 2,
 		'no-undef': 2,
 		'no-unexpected-multiline': 2,
 		'no-unmodified-loop-condition': 2,
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a89cbb4e..ce01fd5df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,17 @@ CHANGELOG
 
 ### NEXT RELEASE
 
+* New UA config param register_from_tag_trail (#793). Credits to @kkozlik.
+
+
+### 3.10.1
+
 * TS: fix socket/transport types (#790).
+* Transport: Handle keep alive request from server (#791).
+* Prevent repeated ICE finish (#800). Credits to @pschichtel .
+* Use built-in MediaStreamConstraints type (#809). Credits to @edumt.
+* Add extra_headers as a modificable property (#825). Credits to @cesterlizi.
+* Fix type definitions to not import Listener from events #837. Credits to @jlaine.
 
 
 ### 3.10.0
diff --git a/dist/jssip.js b/dist/jssip.js
index 743304ab1..97c924c4d 100644
--- a/dist/jssip.js
+++ b/dist/jssip.js
@@ -1,7 +1,7 @@
 /*
- * JsSIP v3.10.0
+ * JsSIP v3.10.1
  * the Javascript SIP library
- * Copyright: 2012-2022 
+ * Copyright: 2012-2023 
  * Homepage: https://jssip.net
  * License: MIT
  */
@@ -19049,6 +19049,10 @@ module.exports = /*#__PURE__*/function (_EventEmitter) {
           _this13._iceReady = false;
 
           var ready = function ready() {
+            if (finished) {
+              return;
+            }
+
             connection.removeEventListener('icecandidate', iceCandidateListener);
             connection.removeEventListener('icegatheringstatechange', iceGatheringStateListener);
             finished = true;
@@ -19075,12 +19079,12 @@ module.exports = /*#__PURE__*/function (_EventEmitter) {
                 candidate: candidate,
                 ready: ready
               });
-            } else if (!finished) {
+            } else {
               ready();
             }
           });
           connection.addEventListener('icegatheringstatechange', iceGatheringStateListener = function iceGatheringStateListener() {
-            if (connection.iceGatheringState === 'complete' && !finished) {
+            if (connection.iceGatheringState === 'complete') {
               ready();
             }
           });
@@ -23854,7 +23858,21 @@ module.exports = /*#__PURE__*/function () {
   }, {
     key: "_onData",
     value: function _onData(data) {
-      // CRLF Keep Alive response from server. Ignore it.
+      // CRLF Keep Alive request from server, reply.
+      if (data === '\r\n\r\n') {
+        logger.debug('received message with double-CRLF Keep Alive request');
+
+        try {
+          // Reply with single CRLF.
+          this.socket.send('\r\n');
+        } catch (error) {
+          logger.warn("error sending Keep Alive response: ".concat(error));
+        }
+
+        return;
+      } // CRLF Keep Alive response from server, ignore it.
+
+
       if (data === '\r\n') {
         logger.debug('received message with CRLF Keep Alive response');
         return;
@@ -24332,6 +24350,12 @@ module.exports = /*#__PURE__*/function (_EventEmitter) {
             break;
           }
 
+        case 'extra_headers':
+          {
+            this._configuration.extra_headers = value;
+            break;
+          }
+
         default:
           logger.warn('set() | cannot set "%s" parameter in runtime', parameter);
           return false;
@@ -24780,7 +24804,7 @@ module.exports = /*#__PURE__*/function (_EventEmitter) {
         }
       }; // Seal the configuration.
 
-      var writable_parameters = ['authorization_user', 'password', 'realm', 'ha1', 'authorization_jwt', 'display_name', 'register'];
+      var writable_parameters = ['authorization_user', 'password', 'realm', 'ha1', 'authorization_jwt', 'display_name', 'register', 'extra_headers'];
 
       for (var parameter in this._configuration) {
         if (Object.prototype.hasOwnProperty.call(this._configuration, parameter)) {
@@ -28340,7 +28364,7 @@ module.exports={
   "name": "jssip",
   "title": "JsSIP",
   "description": "the Javascript SIP library",
-  "version": "3.10.0",
+  "version": "3.10.1",
   "homepage": "https://jssip.net",
   "contributors": [
     "José Luis Millán <jmillan@aliax.net> (https://github.com/jmillan)",
diff --git a/dist/jssip.min.js b/dist/jssip.min.js
index 3adeadac5..265e528bd 100644
--- a/dist/jssip.min.js
+++ b/dist/jssip.min.js
@@ -1,9 +1,9 @@
 /*
- * JsSIP v3.10.0
+ * JsSIP v3.10.1
  * the Javascript SIP library
- * Copyright: 2012-2022 
+ * Copyright: 2012-2023 
  * Homepage: https://jssip.net
  * License: MIT
  */
 
-!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).JsSIP=e()}}(function(){return function(){return function e(t,n,r){function s(o,l){if(!n[o]){if(!t[o]){var u="function"==typeof require&&require;if(!l&&u)return u(o,!0);if(i)return i(o,!0);var a=new Error("Cannot find module '"+o+"'");throw a.code="MODULE_NOT_FOUND",a}var c=n[o]={exports:{}};t[o][0].call(c.exports,function(e){return s(t[o][1][e]||e)},c,c.exports,e,t,n,r)}return n[o].exports}for(var i="function"==typeof require&&require,o=0;o<r.length;o++)s(r[o]);return s}}()({1:[function(e,t,n){"use strict";function r(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return s(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return s(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,i=function(){};return{s:i,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function s(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}var i=e("./Utils"),o=e("./Constants"),l=e("./Grammar"),u=e("./URI"),a=e("./Socket"),c=e("./Exceptions");n.settings={authorization_user:null,password:null,realm:null,ha1:null,authorization_jwt:null,display_name:null,uri:null,contact_uri:null,instance_id:null,use_preloaded_route:!1,session_timers:!0,session_timers_refresh_method:o.UPDATE,session_timers_force_refresher:!1,no_answer_timeout:60,register:!0,register_expires:600,registrar_server:null,sockets:null,connection_recovery_max_interval:o.CONNECTION_RECOVERY_MAX_INTERVAL,connection_recovery_min_interval:o.CONNECTION_RECOVERY_MIN_INTERVAL,extra_headers:null,via_host:"".concat(i.createRandomToken(12),".invalid")};var h={mandatory:{sockets:function(e){var t=[];if(a.isSocket(e))t.push({socket:e});else{if(!Array.isArray(e)||!e.length)return;var n,s=r(e);try{for(s.s();!(n=s.n()).done;){var i=n.value;Object.prototype.hasOwnProperty.call(i,"socket")&&a.isSocket(i.socket)?t.push(i):a.isSocket(i)&&t.push({socket:i})}}catch(e){s.e(e)}finally{s.f()}}return t},uri:function(e){/^sip:/i.test(e)||(e="".concat(o.SIP,":").concat(e));var t=u.parse(e);return t&&t.user?t:void 0}},optional:{authorization_user:function(e){return-1===l.parse('"'.concat(e,'"'),"quoted_string")?void 0:e},authorization_jwt:function(e){if("string"==typeof e)return e},user_agent:function(e){if("string"==typeof e)return e},connection_recovery_max_interval:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},connection_recovery_min_interval:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},contact_uri:function(e){if("string"==typeof e){var t=l.parse(e,"SIP_URI");if(-1!==t)return t}},display_name:function(e){return e},instance_id:function(e){return/^uuid:/i.test(e)&&(e=e.substr(5)),-1===l.parse(e,"uuid")?void 0:e},no_answer_timeout:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},session_timers:function(e){if("boolean"==typeof e)return e},session_timers_refresh_method:function(e){if("string"==typeof e&&((e=e.toUpperCase())===o.INVITE||e===o.UPDATE))return e},session_timers_force_refresher:function(e){if("boolean"==typeof e)return e},password:function(e){return String(e)},realm:function(e){return String(e)},ha1:function(e){return String(e)},register:function(e){if("boolean"==typeof e)return e},register_expires:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},registrar_server:function(e){/^sip:/i.test(e)||(e="".concat(o.SIP,":").concat(e));var t=u.parse(e);return t?t.user?void 0:t:void 0},use_preloaded_route:function(e){if("boolean"==typeof e)return e},extra_headers:function(e){var t=[];if(Array.isArray(e)&&e.length){var n,s=r(e);try{for(s.s();!(n=s.n()).done;){var i=n.value;"string"==typeof i&&t.push(i)}}catch(e){s.e(e)}finally{s.f()}return t}}}};n.load=function(e,t){for(var n in h.mandatory){if(!t.hasOwnProperty(n))throw new c.ConfigurationError(n);var r=t[n],s=h.mandatory[n](r);if(void 0===s)throw new c.ConfigurationError(n,r);e[n]=s}for(var o in h.optional)if(t.hasOwnProperty(o)){var l=t[o];if(i.isEmpty(l))continue;var u=h.optional[o](l);if(void 0===u)throw new c.ConfigurationError(o,l);e[o]=u}}},{"./Constants":2,"./Exceptions":6,"./Grammar":7,"./Socket":22,"./URI":27,"./Utils":28}],2:[function(e,t,n){"use strict";var r=e("../package.json");t.exports={USER_AGENT:"".concat(r.title," ").concat(r.version),SIP:"sip",SIPS:"sips",causes:{CONNECTION_ERROR:"Connection Error",REQUEST_TIMEOUT:"Request Timeout",SIP_FAILURE_CODE:"SIP Failure Code",INTERNAL_ERROR:"Internal Error",BUSY:"Busy",REJECTED:"Rejected",REDIRECTED:"Redirected",UNAVAILABLE:"Unavailable",NOT_FOUND:"Not Found",ADDRESS_INCOMPLETE:"Address Incomplete",INCOMPATIBLE_SDP:"Incompatible SDP",MISSING_SDP:"Missing SDP",AUTHENTICATION_ERROR:"Authentication Error",BYE:"Terminated",WEBRTC_ERROR:"WebRTC Error",CANCELED:"Canceled",NO_ANSWER:"No Answer",EXPIRES:"Expires",NO_ACK:"No ACK",DIALOG_ERROR:"Dialog Error",USER_DENIED_MEDIA_ACCESS:"User Denied Media Access",BAD_MEDIA_DESCRIPTION:"Bad Media Description",RTP_TIMEOUT:"RTP Timeout"},SIP_ERROR_CAUSES:{REDIRECTED:[300,301,302,305,380],BUSY:[486,600],REJECTED:[403,603],NOT_FOUND:[404,604],UNAVAILABLE:[480,410,408,430],ADDRESS_INCOMPLETE:[484,424],INCOMPATIBLE_SDP:[488,606],AUTHENTICATION_ERROR:[401,407]},ACK:"ACK",BYE:"BYE",CANCEL:"CANCEL",INFO:"INFO",INVITE:"INVITE",MESSAGE:"MESSAGE",NOTIFY:"NOTIFY",OPTIONS:"OPTIONS",REGISTER:"REGISTER",REFER:"REFER",UPDATE:"UPDATE",SUBSCRIBE:"SUBSCRIBE",DTMF_TRANSPORT:{INFO:"INFO",RFC2833:"RFC2833"},REASON_PHRASE:{100:"Trying",180:"Ringing",181:"Call Is Being Forwarded",182:"Queued",183:"Session Progress",199:"Early Dialog Terminated",200:"OK",202:"Accepted",204:"No Notification",300:"Multiple Choices",301:"Moved Permanently",302:"Moved Temporarily",305:"Use Proxy",380:"Alternative Service",400:"Bad Request",401:"Unauthorized",402:"Payment Required",403:"Forbidden",404:"Not Found",405:"Method Not Allowed",406:"Not Acceptable",407:"Proxy Authentication Required",408:"Request Timeout",410:"Gone",412:"Conditional Request Failed",413:"Request Entity Too Large",414:"Request-URI Too Long",415:"Unsupported Media Type",416:"Unsupported URI Scheme",417:"Unknown Resource-Priority",420:"Bad Extension",421:"Extension Required",422:"Session Interval Too Small",423:"Interval Too Brief",424:"Bad Location Information",428:"Use Identity Header",429:"Provide Referrer Identity",430:"Flow Failed",433:"Anonymity Disallowed",436:"Bad Identity-Info",437:"Unsupported Certificate",438:"Invalid Identity Header",439:"First Hop Lacks Outbound Support",440:"Max-Breadth Exceeded",469:"Bad Info Package",470:"Consent Needed",478:"Unresolvable Destination",480:"Temporarily Unavailable",481:"Call/Transaction Does Not Exist",482:"Loop Detected",483:"Too Many Hops",484:"Address Incomplete",485:"Ambiguous",486:"Busy Here",487:"Request Terminated",488:"Not Acceptable Here",489:"Bad Event",491:"Request Pending",493:"Undecipherable",494:"Security Agreement Required",500:"JsSIP Internal Error",501:"Not Implemented",502:"Bad Gateway",503:"Service Unavailable",504:"Server Time-out",505:"Version Not Supported",513:"Message Too Large",580:"Precondition Failure",600:"Busy Everywhere",603:"Decline",604:"Does Not Exist Anywhere",606:"Not Acceptable"},ALLOWED_METHODS:"INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY",ACCEPTED_BODY_TYPES:"application/sdp, application/dtmf-relay",MAX_FORWARDS:69,SESSION_EXPIRES:90,MIN_SESSION_EXPIRES:60,CONNECTION_RECOVERY_MAX_INTERVAL:30,CONNECTION_RECOVERY_MIN_INTERVAL:2}},{"../package.json":40}],3:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function s(e,t,n){return t&&r(e.prototype,t),n&&r(e,n),e}var i=e("./Logger"),o=e("./SIPMessage"),l=e("./Constants"),u=e("./Transactions"),a=e("./Dialog/RequestSender"),c=e("./Utils"),h=new i("Dialog"),d={STATUS_EARLY:1,STATUS_CONFIRMED:2,STATUS_TERMINATED:3};t.exports=function(){function e(t,n,r){var s=arguments.length>3&&void 0!==arguments[3]?arguments[3]:d.STATUS_CONFIRMED;if(function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._owner=t,this._ua=t._ua,this._uac_pending_reply=!1,this._uas_pending_reply=!1,!n.hasHeader("contact"))return{error:"unable to create a Dialog without Contact header field"};n instanceof o.IncomingResponse&&(s=n.status_code<200?d.STATUS_EARLY:d.STATUS_CONFIRMED);var i=n.parseHeader("contact");"UAS"===r?(this._id={call_id:n.call_id,local_tag:n.to_tag,remote_tag:n.from_tag,toString:function(){return this.call_id+this.local_tag+this.remote_tag}},this._state=s,this._remote_seqnum=n.cseq,this._local_uri=n.parseHeader("to").uri,this._remote_uri=n.parseHeader("from").uri,this._remote_target=i.uri,this._route_set=n.getHeaders("record-route"),this._ack_seqnum=this._remote_seqnum):"UAC"===r&&(this._id={call_id:n.call_id,local_tag:n.from_tag,remote_tag:n.to_tag,toString:function(){return this.call_id+this.local_tag+this.remote_tag}},this._state=s,this._local_seqnum=n.cseq,this._local_uri=n.parseHeader("from").uri,this._remote_uri=n.parseHeader("to").uri,this._remote_target=i.uri,this._route_set=n.getHeaders("record-route").reverse(),this._ack_seqnum=null),this._ua.newDialog(this),h.debug("new ".concat(r," dialog created with status ").concat(this._state===d.STATUS_EARLY?"EARLY":"CONFIRMED"))}return s(e,null,[{key:"C",get:function(){return d}}]),s(e,[{key:"isTerminated",value:function(){return this._status===d.STATUS_TERMINATED}},{key:"update",value:function(e,t){this._state=d.STATUS_CONFIRMED,h.debug("dialog ".concat(this._id.toString(),"  changed to CONFIRMED state")),"UAC"===t&&(this._route_set=e.getHeaders("record-route").reverse())}},{key:"terminate",value:function(){h.debug("dialog ".concat(this._id.toString()," deleted")),this._ua.destroyDialog(this),this._state=d.STATUS_TERMINATED}},{key:"sendRequest",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},r=c.cloneArray(n.extraHeaders),s=c.cloneObject(n.eventHandlers),i=n.body||null,o=this._createRequest(e,r,i);return s.onAuthenticated=function(){t._local_seqnum+=1},new a(this,o,s).send(),o}},{key:"receiveRequest",value:function(e){this._checkInDialogRequest(e)&&(e.method===l.ACK&&null!==this._ack_seqnum?this._ack_seqnum=null:e.method===l.INVITE&&(this._ack_seqnum=e.cseq),this._owner.receiveRequest(e))}},{key:"_createRequest",value:function(e,t,n){t=c.cloneArray(t),this._local_seqnum||(this._local_seqnum=Math.floor(1e4*Math.random()));var r=e===l.CANCEL||e===l.ACK?this._local_seqnum:this._local_seqnum+=1;return new o.OutgoingRequest(e,this._remote_target,this._ua,{cseq:r,call_id:this._id.call_id,from_uri:this._local_uri,from_tag:this._id.local_tag,to_uri:this._remote_uri,to_tag:this._id.remote_tag,route_set:this._route_set},t,n)}},{key:"_checkInDialogRequest",value:function(e){var t=this;if(this._remote_seqnum)if(e.cseq<this._remote_seqnum){if(e.method!==l.ACK)return e.reply(500),!1;if(null===this._ack_seqnum||e.cseq!==this._ack_seqnum)return!1}else e.cseq>this._remote_seqnum&&(this._remote_seqnum=e.cseq);else this._remote_seqnum=e.cseq;if(e.method===l.INVITE||e.method===l.UPDATE&&e.body){if(!0===this._uac_pending_reply)e.reply(491);else{if(!0===this._uas_pending_reply){var n=1+(10*Math.random()|0);return e.reply(500,null,["Retry-After:".concat(n)]),!1}this._uas_pending_reply=!0;e.server_transaction.on("stateChanged",function n(){e.server_transaction.state!==u.C.STATUS_ACCEPTED&&e.server_transaction.state!==u.C.STATUS_COMPLETED&&e.server_transaction.state!==u.C.STATUS_TERMINATED||(e.server_transaction.removeListener("stateChanged",n),t._uas_pending_reply=!1)})}e.hasHeader("contact")&&e.server_transaction.on("stateChanged",function(){e.server_transaction.state===u.C.STATUS_ACCEPTED&&(t._remote_target=e.parseHeader("contact").uri)})}else e.method===l.NOTIFY&&e.hasHeader("contact")&&e.server_transaction.on("stateChanged",function(){e.server_transaction.state===u.C.STATUS_COMPLETED&&(t._remote_target=e.parseHeader("contact").uri)});return!0}},{key:"id",get:function(){return this._id}},{key:"local_seqnum",get:function(){return this._local_seqnum},set:function(e){this._local_seqnum=e}},{key:"owner",get:function(){return this._owner}},{key:"uac_pending_reply",get:function(){return this._uac_pending_reply},set:function(e){this._uac_pending_reply=e}},{key:"uas_pending_reply",get:function(){return this._uas_pending_reply}}]),e}()},{"./Constants":2,"./Dialog/RequestSender":4,"./Logger":9,"./SIPMessage":21,"./Transactions":24,"./Utils":28}],4:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("../Constants"),i=e("../Transactions"),o=e("../RequestSender"),l={onRequestTimeout:function(){},onTransportError:function(){},onSuccessResponse:function(){},onErrorResponse:function(){},onAuthenticated:function(){},onDialogError:function(){}};t.exports=function(){function e(t,n,r){for(var s in function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._dialog=t,this._ua=t._ua,this._request=n,this._eventHandlers=r,this._reattempt=!1,this._reattemptTimer=null,l)Object.prototype.hasOwnProperty.call(l,s)&&(this._eventHandlers[s]||(this._eventHandlers[s]=l[s]))}var t,n,u;return t=e,(n=[{key:"send",value:function(){var e=this,t=new o(this._ua,this._request,{onRequestTimeout:function(){e._eventHandlers.onRequestTimeout()},onTransportError:function(){e._eventHandlers.onTransportError()},onAuthenticated:function(t){e._eventHandlers.onAuthenticated(t)},onReceiveResponse:function(t){e._receiveResponse(t)}});if(t.send(),(this._request.method===s.INVITE||this._request.method===s.UPDATE&&this._request.body)&&t.clientTransaction.state!==i.C.STATUS_TERMINATED){this._dialog.uac_pending_reply=!0;t.clientTransaction.on("stateChanged",function n(){t.clientTransaction.state!==i.C.STATUS_ACCEPTED&&t.clientTransaction.state!==i.C.STATUS_COMPLETED&&t.clientTransaction.state!==i.C.STATUS_TERMINATED||(t.clientTransaction.removeListener("stateChanged",n),e._dialog.uac_pending_reply=!1)})}}},{key:"_receiveResponse",value:function(e){var t=this;408===e.status_code||481===e.status_code?this._eventHandlers.onDialogError(e):e.method===s.INVITE&&491===e.status_code?this._reattempt?e.status_code>=200&&e.status_code<300?this._eventHandlers.onSuccessResponse(e):e.status_code>=300&&this._eventHandlers.onErrorResponse(e):(this._request.cseq=this._dialog.local_seqnum+=1,this._reattemptTimer=setTimeout(function(){t._dialog.isTerminated()||(t._reattempt=!0,t.send())},1e3)):e.status_code>=200&&e.status_code<300?this._eventHandlers.onSuccessResponse(e):e.status_code>=300&&this._eventHandlers.onErrorResponse(e)}},{key:"request",get:function(){return this._request}}])&&r(t.prototype,n),u&&r(t,u),e}()},{"../Constants":2,"../RequestSender":20,"../Transactions":24}],5:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("./Logger"),i=e("./Utils"),o=new s("DigestAuthentication");t.exports=function(){function e(t){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._credentials=t,this._cnonce=null,this._nc=0,this._ncHex="00000000",this._algorithm=null,this._realm=null,this._nonce=null,this._opaque=null,this._stale=null,this._qop=null,this._method=null,this._uri=null,this._ha1=null,this._response=null}var t,n,s;return t=e,(n=[{key:"get",value:function(e){switch(e){case"realm":return this._realm;case"ha1":return this._ha1;default:return void o.warn('get() | cannot get "%s" parameter',e)}}},{key:"authenticate",value:function(e,t){var n=e.method,r=e.ruri,s=e.body,l=arguments.length>2&&void 0!==arguments[2]?arguments[2]:null;if(this._algorithm=t.algorithm,this._realm=t.realm,this._nonce=t.nonce,this._opaque=t.opaque,this._stale=t.stale,this._algorithm){if("MD5"!==this._algorithm)return o.warn('authenticate() | challenge with Digest algorithm different than "MD5", authentication aborted'),!1}else this._algorithm="MD5";if(!this._nonce)return o.warn("authenticate() | challenge without Digest nonce, authentication aborted"),!1;if(!this._realm)return o.warn("authenticate() | challenge without Digest realm, authentication aborted"),!1;if(!this._credentials.password){if(!this._credentials.ha1)return o.warn("authenticate() | no plain SIP password nor ha1 provided, authentication aborted"),!1;if(this._credentials.realm!==this._realm)return o.warn('authenticate() | no plain SIP password, and stored `realm` does not match the given `realm`, cannot authenticate [stored:"%s", 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_.NotSupportedError('"reject" not supported for outgoing Message');if(this._is_replied)throw new Error("incoming Message already replied");if(t<300||t>=700)throw new TypeError("Invalid status_code: ".concat(t));this._is_replied=!0,this._request.reply(t,n,r,s)}},{key:"_receiveResponse",value:function(e){if(!this._closed)switch(!0){case/^1[0-9]{2}$/.test(e.status_code):break;case/^2[0-9]{2}$/.test(e.status_code):this._succeeded("remote",e);break;default:var 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e=this._display_name?'"'.concat(this._quote(this._display_name),'" '):"";for(var t in e+="<".concat(this._uri.toString(),">"),this._parameters)Object.prototype.hasOwnProperty.call(this._parameters,t)&&(e+=";".concat(t),null!==this._parameters[t]&&(e+="=".concat(this._parameters[t])));return e}},{key:"uri",get:function(){return this._uri}},{key:"display_name",get:function(){return this._display_name},set:function(e){this._display_name=0===e?"0":e}}]),e}()},{"./Grammar":7,"./URI":27}],12:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var u=e("events").EventEmitter,a=e("./Logger"),c=e("./Constants"),h=e("./SIPMessage"),d=e("./Utils"),f=e("./RequestSender"),_=e("./Exceptions"),p=new a("Options");t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(a,u);var t,n,r,l=o(a);function a(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,a),(t=l.call(this))._ua=e,t._request=null,t._closed=!1,t._direction=null,t._local_identity=null,t._remote_identity=null,t._is_replied=!1,t._data={},t}return t=a,(n=[{key:"send",value:function(e,t){var n=this,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},s=e;if(void 0===e)throw new TypeError("A target is required for OPTIONS");if(!(e=this._ua.normalizeTarget(e)))throw new TypeError("Invalid target: ".concat(s));var i=d.cloneArray(r.extraHeaders),o=d.cloneObject(r.eventHandlers),l=r.contentType||"application/sdp";for(var u in o)Object.prototype.hasOwnProperty.call(o,u)&&this.on(u,o[u]);i.push("Content-Type: ".concat(l)),this._request=new h.OutgoingRequest(c.OPTIONS,e,this._ua,null,i),t&&(this._request.body=t);var a=new f(this._ua,this._request,{onRequestTimeout:function(){n._onRequestTimeout()},onTransportError:function(){n._onTransportError()},onReceiveResponse:function(e){n._receiveResponse(e)}});this._newOptions("local",this._request),a.send()}},{key:"init_incoming",value:function(e){this._request=e,this._newOptions("remote",e),this._is_replied||(this._is_replied=!0,e.reply(200)),this._close()}},{key:"accept",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=d.cloneArray(e.extraHeaders),n=e.body;if("incoming"!==this._direction)throw new _.NotSupportedError('"accept" not supported for outgoing Options');if(this._is_replied)throw new Error("incoming Options already replied");this._is_replied=!0,this._request.reply(200,null,t,n)}},{key:"reject",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=e.status_code||480,n=e.reason_phrase,r=d.cloneArray(e.extraHeaders),s=e.body;if("incoming"!==this._direction)throw new _.NotSupportedError('"reject" not supported for outgoing Options');if(this._is_replied)throw new Error("incoming Options already replied");if(t<300||t>=700)throw new TypeError("Invalid status_code: ".concat(t));this._is_replied=!0,this._request.reply(t,n,r,s)}},{key:"_receiveResponse",value:function(e){if(!this._closed)switch(!0){case/^1[0-9]{2}$/.test(e.status_code):break;case/^2[0-9]{2}$/.test(e.status_code):this._succeeded("remote",e);break;default:var t=d.sipErrorCause(e.status_code);this._failed("remote",e,t)}}},{key:"_onRequestTimeout",value:function(){this._closed||this._failed("system",null,c.causes.REQUEST_TIMEOUT)}},{key:"_onTransportError",value:function(){this._closed||this._failed("system",null,c.causes.CONNECTION_ERROR)}},{key:"_close",value:function(){this._closed=!0,this._ua.destroyMessage(this)}},{key:"_newOptions",value:function(e,t){"remote"===e?(this._direction="incoming",this._local_identity=t.to,this._remote_identity=t.from):"local"===e&&(this._direction="outgoing",this._local_identity=t.from,this._remote_identity=t.to),this._ua.newOptions(this,{originator:e,message:this,request:t})}},{key:"_failed",value:function(e,t,n){p.debug("OPTIONS failed"),this._close(),p.debug('emit "failed"'),this.emit("failed",{originator:e,response:t||null,cause:n})}},{key:"_succeeded",value:function(e,t){p.debug("OPTIONS succeeded"),this._close(),p.debug('emit 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r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function s(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}var i=e("./Logger"),o=e("./Grammar"),l=e("./SIPMessage"),u=new i("Parser");function a(e,t){var n=t,r=0,s=0;if(e.substring(n,n+2).match(/(^\r\n)/))return-2;for(;0===r;){if(-1===(s=e.indexOf("\r\n",n)))return s;!e.substring(s+2,s+4).match(/(^\r\n)/)&&e.charAt(s+2).match(/(^\s+)/)?n=s+2:r=s}return r}function c(e,t,n,s){var i,u=t.indexOf(":",n),a=t.substring(n,u).trim(),c=t.substring(u+1,s).trim();switch(a.toLowerCase()){case"via":case"v":e.addHeader("via",c),1===e.getHeaders("via").length?(i=e.parseHeader("Via"))&&(e.via=i,e.via_branch=i.branch):i=0;break;case"from":case"f":e.setHeader("from",c),(i=e.parseHeader("from"))&&(e.from=i,e.from_tag=i.getParam("tag"));break;case"to":case"t":e.setHeader("to",c),(i=e.parseHeader("to"))&&(e.to=i,e.to_tag=i.getParam("tag"));break;case"record-route":if(-1===(i=o.parse(c,"Record_Route")))i=void 0;else{var h,d=r(i);try{for(d.s();!(h=d.n()).done;){var f=h.value;e.addHeader("record-route",c.substring(f.possition,f.offset)),e.headers["Record-Route"][e.getHeaders("record-route").length-1].parsed=f.parsed}}catch(e){d.e(e)}finally{d.f()}}break;case"call-id":case"i":e.setHeader("call-id",c),(i=e.parseHeader("call-id"))&&(e.call_id=c);break;case"contact":case"m":if(-1===(i=o.parse(c,"Contact")))i=void 0;else{var _,p=r(i);try{for(p.s();!(_=p.n()).done;){var m=_.value;e.addHeader("contact",c.substring(m.possition,m.offset)),e.headers.Contact[e.getHeaders("contact").length-1].parsed=m.parsed}}catch(e){p.e(e)}finally{p.f()}}break;case"content-length":case"l":e.setHeader("content-length",c),i=e.parseHeader("content-length");break;case"content-type":case"c":e.setHeader("content-type",c),i=e.parseHeader("content-type");break;case"cseq":e.setHeader("cseq",c),(i=e.parseHeader("cseq"))&&(e.cseq=i.value),e instanceof l.IncomingResponse&&(e.method=i.method);break;case"max-forwards":e.setHeader("max-forwards",c),i=e.parseHeader("max-forwards");break;case"www-authenticate":e.setHeader("www-authenticate",c),i=e.parseHeader("www-authenticate");break;case"proxy-authenticate":e.setHeader("proxy-authenticate",c),i=e.parseHeader("proxy-authenticate");break;case"session-expires":case"x":e.setHeader("session-expires",c),(i=e.parseHeader("session-expires"))&&(e.session_expires=i.expires,e.session_expires_refresher=i.refresher);break;case"refer-to":case"r":e.setHeader("refer-to",c),(i=e.parseHeader("refer-to"))&&(e.refer_to=i);break;case"replaces":e.setHeader("replaces",c),(i=e.parseHeader("replaces"))&&(e.replaces=i);break;case"event":case"o":e.setHeader("event",c),(i=e.parseHeader("event"))&&(e.event=i);break;default:e.addHeader(a,c),i=0}return void 0!==i||{error:'error parsing header "'.concat(a,'"')}}n.parseMessage=function(e,t){var n,r,s=e.indexOf("\r\n");if(-1!==s){var i=e.substring(0,s),h=o.parse(i,"Request_Response");if(-1!==h){h.status_code?((n=new l.IncomingResponse).status_code=h.status_code,n.reason_phrase=h.reason_phrase):((n=new l.IncomingRequest(t)).method=h.method,n.ruri=h.uri),n.data=e;for(var d=s+2;;){if(-2===(s=a(e,d))){r=d+2;break}if(-1===s)return void u.warn("parseMessage() | malformed message");if(!0!==(h=c(n,e,d,s)))return void u.warn("parseMessage() |",h.error);d=s+2}if(n.hasHeader("content-length")){var f=n.getHeader("content-length");n.body=e.substr(r,f)}else n.body=e.substring(r);return n}u.warn('parseMessage() | error parsing first line of SIP message: "'.concat(i,'"'))}else u.warn("parseMessage() | no CRLF found, not a SIP message")}},{"./Grammar":7,"./Logger":9,"./SIPMessage":21}],14:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof 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function")}(this,n),w.debug("new"),(r=t.call(this))._id=null,r._ua=e,r._status=I.STATUS_NULL,r._dialog=null,r._earlyDialogs={},r._contact=null,r._from_tag=null,r._to_tag=null,r._connection=null,r._connectionPromiseQueue=Promise.resolve(),r._request=null,r._is_canceled=!1,r._cancel_reason="",r._is_confirmed=!1,r._late_sdp=!1,r._rtcOfferConstraints=null,r._rtcAnswerConstraints=null,r._localMediaStream=null,r._localMediaStreamLocallyGenerated=!1,r._rtcReady=!0,r._iceReady=!1,r._timers={ackTimer:null,expiresTimer:null,invite2xxTimer:null,userNoAnswerTimer:null},r._direction=null,r._local_identity=null,r._remote_identity=null,r._start_time=null,r._end_time=null,r._tones=null,r._audioMuted=!1,r._videoMuted=!1,r._localHold=!1,r._remoteHold=!1,r._sessionTimers={enabled:r._ua.configuration.session_timers,refreshMethod:r._ua.configuration.session_timers_refresh_method,defaultExpires:_.SESSION_EXPIRES,currentExpires:null,running:!1,refresher:!1,timer:null},r._referSubscribers={},r._data={},r}return l(n,null,[{key:"C",get:function(){return I}}]),l(n,[{key:"isInProgress",value:function(){switch(this._status){case I.STATUS_NULL:case I.STATUS_INVITE_SENT:case I.STATUS_1XX_RECEIVED:case I.STATUS_INVITE_RECEIVED:case I.STATUS_WAITING_FOR_ANSWER:return!0;default:return!1}}},{key:"isEstablished",value:function(){switch(this._status){case I.STATUS_ANSWERED:case I.STATUS_WAITING_FOR_ACK:case I.STATUS_CONFIRMED:return!0;default:return!1}}},{key:"isEnded",value:function(){switch(this._status){case I.STATUS_CANCELED:case I.STATUS_TERMINATED:return!0;default:return!1}}},{key:"isMuted",value:function(){return{audio:this._audioMuted,video:this._videoMuted}}},{key:"isOnHold",value:function(){return{local:this._localHold,remote:this._remoteHold}}},{key:"connect",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=arguments.length>2?arguments[2]:void 0;w.debug("connect()");var r=e,s=v.cloneObject(t.eventHandlers),i=v.cloneArray(t.extraHeaders),o=v.cloneObject(t.mediaConstraints,{audio:!0,video:!0}),l=t.mediaStream||null,u=v.cloneObject(t.pcConfig,{iceServers:[]}),a=t.rtcConstraints||null,c=t.rtcOfferConstraints||null;if(this._rtcOfferConstraints=c,this._rtcAnswerConstraints=t.rtcAnswerConstraints||null,this._data=t.data||this._data,void 0===e)throw new TypeError("Not enough arguments");if(this._status!==I.STATUS_NULL)throw new p.InvalidStateError(this._status);if(!window.RTCPeerConnection)throw new p.NotSupportedError("WebRTC not supported");if(!(e=this._ua.normalizeTarget(e)))throw new TypeError("Invalid target: ".concat(r));for(var h in this._sessionTimers.enabled&&v.isDecimal(t.sessionTimersExpires)&&(t.sessionTimersExpires>=_.MIN_SESSION_EXPIRES?this._sessionTimers.defaultExpires=t.sessionTimersExpires:this._sessionTimers.defaultExpires=_.SESSION_EXPIRES),s)Object.prototype.hasOwnProperty.call(s,h)&&this.on(h,s[h]);this._from_tag=v.newTag();var d=t.anonymous||!1,f={from_tag:this._from_tag};this._contact=this._ua.contact.toString({anonymous:d,outbound:!0}),d?(f.from_display_name="Anonymous",f.from_uri=new R("sip","anonymous","anonymous.invalid"),i.push("P-Preferred-Identity: ".concat(this._ua.configuration.uri.toString())),i.push("Privacy: id")):t.fromUserName&&(f.from_uri=new R("sip",t.fromUserName,this._ua.configuration.uri.host),i.push("P-Preferred-Identity: ".concat(this._ua.configuration.uri.toString()))),t.fromDisplayName&&(f.from_display_name=t.fromDisplayName),i.push("Contact: ".concat(this._contact)),i.push("Content-Type: application/sdp"),this._sessionTimers.enabled&&i.push("Session-Expires: ".concat(this._sessionTimers.defaultExpires).concat(this._ua.configuration.session_timers_force_refresher?";refresher=uac":"")),this._request=new y.InitialOutgoingInviteRequest(e,this._ua,f,i),this._id=this._request.call_id+this._from_tag,this._createRTCConnection(u,a),this._direction="outgoing",this._local_identity=this._request.from,this._remote_identity=this._request.to,n&&n(this),this._newRTCSession("local",this._request),this._sendInitialRequest(o,c,l)}},{key:"init_incoming",value:function(e,t){var n,r=this;w.debug("init_incoming()");var s=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0;e.body&&"application/sdp"!==s?e.reply(415):(this._status=I.STATUS_INVITE_RECEIVED,this._from_tag=e.from_tag,this._id=e.call_id+this._from_tag,this._request=e,this._contact=this._ua.contact.toString(),e.hasHeader("expires")&&(n=1e3*e.getHeader("expires")),e.to_tag=v.newTag(),this._createDialog(e,"UAS",!0)?(e.body?this._late_sdp=!1:this._late_sdp=!0,this._status=I.STATUS_WAITING_FOR_ANSWER,this._timers.userNoAnswerTimer=setTimeout(function(){e.reply(408),r._failed("local",null,_.causes.NO_ANSWER)},this._ua.configuration.no_answer_timeout),n&&(this._timers.expiresTimer=setTimeout(function(){r._status===I.STATUS_WAITING_FOR_ANSWER&&(e.reply(487),r._failed("system",null,_.causes.EXPIRES))},n)),this._direction="incoming",this._local_identity=e.to,this._remote_identity=e.from,t&&t(this),this._newRTCSession("remote",e),this._status!==I.STATUS_TERMINATED&&(e.reply(180,null,["Contact: ".concat(this._contact)]),this._progress("local",null))):e.reply(500,"Missing Contact header field"))}},{key:"answer",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("answer()");var n=this._request,r=v.cloneArray(t.extraHeaders),i=v.cloneObject(t.mediaConstraints),o=t.mediaStream||null,l=v.cloneObject(t.pcConfig,{iceServers:[]}),u=t.rtcConstraints||null,a=t.rtcAnswerConstraints||null,c=v.cloneObject(t.rtcOfferConstraints),h=!1,d=!1,f=!1,m=!1;if(this._rtcAnswerConstraints=a,this._rtcOfferConstraints=t.rtcOfferConstraints||null,this._data=t.data||this._data,"incoming"!==this._direction)throw new p.NotSupportedError('"answer" not supported for outgoing RTCSession');if(this._status!==I.STATUS_WAITING_FOR_ANSWER)throw new p.InvalidStateError(this._status);if(this._sessionTimers.enabled&&v.isDecimal(t.sessionTimersExpires)&&(t.sessionTimersExpires>=_.MIN_SESSION_EXPIRES?this._sessionTimers.defaultExpires=t.sessionTimersExpires:this._sessionTimers.defaultExpires=_.SESSION_EXPIRES),this._status=I.STATUS_ANSWERED,this._createDialog(n,"UAS")){clearTimeout(this._timers.userNoAnswerTimer),r.unshift("Contact: ".concat(this._contact));var g=n.parseSDP();Array.isArray(g.media)||(g.media=[g.media]);var y,T=s(g.media);try{for(T.s();!(y=T.n()).done;){var C=y.value;"audio"===C.type&&(h=!0,C.direction&&"sendrecv"!==C.direction||(f=!0)),"video"===C.type&&(d=!0,C.direction&&"sendrecv"!==C.direction||(m=!0))}}catch(e){T.e(e)}finally{T.f()}if(o&&!1===i.audio){var b,S=s(o.getAudioTracks());try{for(S.s();!(b=S.n()).done;){var E=b.value;o.removeTrack(E)}}catch(e){S.e(e)}finally{S.f()}}if(o&&!1===i.video){var A,R=s(o.getVideoTracks());try{for(R.s();!(A=R.n()).done;){var O=A.value;o.removeTrack(O)}}catch(e){R.e(e)}finally{R.f()}}o||void 0!==i.audio||(i.audio=f),o||void 0!==i.video||(i.video=m),o||h||c.offerToReceiveAudio||(i.audio=!1),o||d||c.offerToReceiveVideo||(i.video=!1),this._createRTCConnection(l,u),Promise.resolve().then(function(){return o||(i.audio||i.video?(e._localMediaStreamLocallyGenerated=!0,navigator.mediaDevices.getUserMedia(i).catch(function(t){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");throw n.reply(480),e._failed("local",null,_.causes.USER_DENIED_MEDIA_ACCESS),w.warn('emit "getusermediafailed" [error:%o]',t),e.emit("getusermediafailed",t),new Error("getUserMedia() failed")})):void 0)}).then(function(t){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");e._localMediaStream=t,t&&t.getTracks().forEach(function(n){e._connection.addTrack(n,t)})}).then(function(){if(!e._late_sdp){var t={originator:"remote",type:"offer",sdp:n.body};w.debug('emit "sdp"'),e.emit("sdp",t);var r=new RTCSessionDescription({type:"offer",sdp:t.sdp});return e._connectionPromiseQueue=e._connectionPromiseQueue.then(function(){return e._connection.setRemoteDescription(r)}).catch(function(t){throw n.reply(488),e._failed("system",null,_.causes.WEBRTC_ERROR),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',t),e.emit("peerconnection:setremotedescriptionfailed",t),new Error("peerconnection.setRemoteDescription() failed")}),e._connectionPromiseQueue}}).then(function(){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");return e._connecting(n),e._late_sdp?e._createLocalDescription("offer",e._rtcOfferConstraints).catch(function(){throw n.reply(500),new Error("_createLocalDescription() failed")}):e._createLocalDescription("answer",a).catch(function(){throw n.reply(500),new Error("_createLocalDescription() failed")})}).then(function(t){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");e._handleSessionTimersInIncomingRequest(n,r),n.reply(200,null,r,t,function(){e._status=I.STATUS_WAITING_FOR_ACK,e._setInvite2xxTimer(n,t),e._setACKTimer(),e._accepted("local")},function(){e._failed("system",null,_.causes.CONNECTION_ERROR)})}).catch(function(t){e._status!==I.STATUS_TERMINATED&&w.warn(t)})}else n.reply(500,"Error creating dialog")}},{key:"terminate",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("terminate()");var n,r=t.cause||_.causes.BYE,s=v.cloneArray(t.extraHeaders),i=t.body,o=t.status_code,l=t.reason_phrase;if(this._status===I.STATUS_TERMINATED)throw new p.InvalidStateError(this._status);switch(this._status){case I.STATUS_NULL:case I.STATUS_INVITE_SENT:case I.STATUS_1XX_RECEIVED:if(w.debug("canceling session"),o&&(o<200||o>=700))throw new TypeError("Invalid status_code: ".concat(o));o&&(l=l||_.REASON_PHRASE[o]||"",n="SIP ;cause=".concat(o,' ;text="').concat(l,'"')),this._status===I.STATUS_NULL||this._status===I.STATUS_INVITE_SENT?(this._is_canceled=!0,this._cancel_reason=n):this._status===I.STATUS_1XX_RECEIVED&&this._request.cancel(n),this._status=I.STATUS_CANCELED,this._failed("local",null,_.causes.CANCELED);break;case I.STATUS_WAITING_FOR_ANSWER:case I.STATUS_ANSWERED:if(w.debug("rejecting session"),(o=o||480)<300||o>=700)throw new TypeError("Invalid status_code: ".concat(o));this._request.reply(o,l,s,i),this._failed("local",null,_.causes.REJECTED);break;case I.STATUS_WAITING_FOR_ACK:case I.STATUS_CONFIRMED:if(w.debug("terminating session"),l=t.reason_phrase||_.REASON_PHRASE[o]||"",o&&(o<200||o>=700))throw new TypeError("Invalid status_code: ".concat(o));if(o&&s.push("Reason: SIP ;cause=".concat(o,'; text="').concat(l,'"')),this._status===I.STATUS_WAITING_FOR_ACK&&"incoming"===this._direction&&this._request.server_transaction.state!==m.C.STATUS_TERMINATED){var u=this._dialog;this.receiveRequest=function(t){t.method===_.ACK&&(e.sendRequest(_.BYE,{extraHeaders:s,body:i}),u.terminate())},this._request.server_transaction.on("stateChanged",function(){e._request.server_transaction.state===m.C.STATUS_TERMINATED&&(e.sendRequest(_.BYE,{extraHeaders:s,body:i}),u.terminate())}),this._ended("local",null,r),this._dialog=u,this._ua.newDialog(u)}else this.sendRequest(_.BYE,{extraHeaders:s,body:i}),this._ended("local",null,r)}}},{key:"sendDTMF",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};w.debug("sendDTMF() | tones: %s",e);var n=0,r=t.duration||null,s=t.interToneGap||null,i=t.transportType||_.DTMF_TRANSPORT.INFO;if(void 0===e)throw new TypeError("Not enough arguments");if(this._status!==I.STATUS_CONFIRMED&&this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_1XX_RECEIVED)throw new p.InvalidStateError(this._status);if(i!==_.DTMF_TRANSPORT.INFO&&i!==_.DTMF_TRANSPORT.RFC2833)throw new TypeError("invalid transportType: ".concat(i));if("number"==typeof e&&(e=e.toString()),!e||"string"!=typeof e||!e.match(/^[0-9A-DR#*,]+$/i))throw new TypeError("Invalid tones: ".concat(e));if(r&&!v.isDecimal(r))throw new TypeError("Invalid tone duration: ".concat(r));if(r?r<b.C.MIN_DURATION?(w.debug('"duration" value is lower than the minimum allowed, setting it to '.concat(b.C.MIN_DURATION," milliseconds")),r=b.C.MIN_DURATION):r>b.C.MAX_DURATION?(w.debug('"duration" value is greater than the maximum allowed, setting it to '.concat(b.C.MAX_DURATION," milliseconds")),r=b.C.MAX_DURATION):r=Math.abs(r):r=b.C.DEFAULT_DURATION,t.duration=r,s&&!v.isDecimal(s))throw new TypeError("Invalid interToneGap: ".concat(s));if(s?s<b.C.MIN_INTER_TONE_GAP?(w.debug('"interToneGap" value is lower than the minimum allowed, setting it to '.concat(b.C.MIN_INTER_TONE_GAP," milliseconds")),s=b.C.MIN_INTER_TONE_GAP):s=Math.abs(s):s=b.C.DEFAULT_INTER_TONE_GAP,i!==_.DTMF_TRANSPORT.RFC2833)this._tones?this._tones+=e:(this._tones=e,function e(){var i=this;var o;if(this._status===I.STATUS_TERMINATED||!this._tones||n>=this._tones.length)return void(this._tones=null);var l=this._tones[n];n+=1;if(","===l)o=2e3;else{var u=new b(this);t.eventHandlers={onFailed:function(){i._tones=null}},u.send(l,t),o=r+s}setTimeout(e.bind(this),o)}.call(this));else{var o=this._getDTMFRTPSender();o&&(e=o.toneBuffer+e,o.insertDTMF(e,r,s))}}},{key:"sendInfo",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(w.debug("sendInfo()"),this._status!==I.STATUS_CONFIRMED&&this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_1XX_RECEIVED)throw new p.InvalidStateError(this._status);new S(this).send(e,t,n)}},{key:"mute",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{audio:!0,video:!1};w.debug("mute()");var t=!1,n=!1;!1===this._audioMuted&&e.audio&&(t=!0,this._audioMuted=!0,this._toggleMuteAudio(!0)),!1===this._videoMuted&&e.video&&(n=!0,this._videoMuted=!0,this._toggleMuteVideo(!0)),!0!==t&&!0!==n||this._onmute({audio:t,video:n})}},{key:"unmute",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{audio:!0,video:!0};w.debug("unmute()");var t=!1,n=!1;!0===this._audioMuted&&e.audio&&(t=!0,this._audioMuted=!1,!1===this._localHold&&this._toggleMuteAudio(!1)),!0===this._videoMuted&&e.video&&(n=!0,this._videoMuted=!1,!1===this._localHold&&this._toggleMuteVideo(!1)),!0!==t&&!0!==n||this._onunmute({audio:t,video:n})}},{key:"hold",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=arguments.length>1?arguments[1]:void 0;if(w.debug("hold()"),this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!0===this._localHold)return!1;if(!this._isReadyToReOffer())return!1;this._localHold=!0,this._onhold("local");var r={succeeded:function(){n&&n()},failed:function(){e.terminate({cause:_.causes.WEBRTC_ERROR,status_code:500,reason_phrase:"Hold Failed"})}};return t.useUpdate?this._sendUpdate({sdpOffer:!0,eventHandlers:r,extraHeaders:t.extraHeaders}):this._sendReinvite({eventHandlers:r,extraHeaders:t.extraHeaders}),!0}},{key:"unhold",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=arguments.length>1?arguments[1]:void 0;if(w.debug("unhold()"),this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!1===this._localHold)return!1;if(!this._isReadyToReOffer())return!1;this._localHold=!1,this._onunhold("local");var r={succeeded:function(){n&&n()},failed:function(){e.terminate({cause:_.causes.WEBRTC_ERROR,status_code:500,reason_phrase:"Unhold Failed"})}};return t.useUpdate?this._sendUpdate({sdpOffer:!0,eventHandlers:r,extraHeaders:t.extraHeaders}):this._sendReinvite({eventHandlers:r,extraHeaders:t.extraHeaders}),!0}},{key:"renegotiate",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=arguments.length>1?arguments[1]:void 0;w.debug("renegotiate()");var r=t.rtcOfferConstraints||null;if(this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!this._isReadyToReOffer())return!1;var s={succeeded:function(){n&&n()},failed:function(){e.terminate({cause:_.causes.WEBRTC_ERROR,status_code:500,reason_phrase:"Media Renegotiation Failed"})}};return this._setLocalMediaStatus(),t.useUpdate?this._sendUpdate({sdpOffer:!0,eventHandlers:s,rtcOfferConstraints:r,extraHeaders:t.extraHeaders}):this._sendReinvite({eventHandlers:s,rtcOfferConstraints:r,extraHeaders:t.extraHeaders}),!0}},{key:"refer",value:function(e,t){var n=this;w.debug("refer()");var r=e;if(this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!(e=this._ua.normalizeTarget(e)))throw new TypeError("Invalid target: ".concat(r));var s=new A(this);s.sendRefer(e,t);var i=s.id;return this._referSubscribers[i]=s,s.on("requestFailed",function(){delete n._referSubscribers[i]}),s.on("accepted",function(){delete n._referSubscribers[i]}),s.on("failed",function(){delete n._referSubscribers[i]}),s}},{key:"sendRequest",value:function(e,t){return w.debug("sendRequest()"),this._dialog.sendRequest(e,t)}},{key:"receiveRequest",value:function(e){var t=this;if(w.debug("receiveRequest()"),e.method===_.CANCEL)this._status!==I.STATUS_WAITING_FOR_ANSWER&&this._status!==I.STATUS_ANSWERED||(this._status=I.STATUS_CANCELED,this._request.reply(487),this._failed("remote",e,_.causes.CANCELED));else switch(e.method){case _.ACK:if(this._status!==I.STATUS_WAITING_FOR_ACK)return;if(this._status=I.STATUS_CONFIRMED,clearTimeout(this._timers.ackTimer),clearTimeout(this._timers.invite2xxTimer),this._late_sdp){if(!e.body){this.terminate({cause:_.causes.MISSING_SDP,status_code:400});break}var n={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",n);var r=new RTCSessionDescription({type:"answer",sdp:n.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(r)}).then(function(){t._is_confirmed||t._confirmed("remote",e)}).catch(function(e){t.terminate({cause:_.causes.BAD_MEDIA_DESCRIPTION,status_code:488}),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)})}else this._is_confirmed||this._confirmed("remote",e);break;case _.BYE:this._status===I.STATUS_CONFIRMED||this._status===I.STATUS_WAITING_FOR_ACK?(e.reply(200),this._ended("remote",e,_.causes.BYE)):this._status===I.STATUS_INVITE_RECEIVED||this._status===I.STATUS_WAITING_FOR_ANSWER?(e.reply(200),this._request.reply(487,"BYE Received"),this._ended("remote",e,_.causes.BYE)):e.reply(403,"Wrong Status");break;case _.INVITE:this._status===I.STATUS_CONFIRMED?e.hasHeader("replaces")?this._receiveReplaces(e):this._receiveReinvite(e):e.reply(403,"Wrong Status");break;case _.INFO:if(this._status===I.STATUS_1XX_RECEIVED||this._status===I.STATUS_WAITING_FOR_ANSWER||this._status===I.STATUS_ANSWERED||this._status===I.STATUS_WAITING_FOR_ACK||this._status===I.STATUS_CONFIRMED){var s=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0;s&&s.match(/^application\/dtmf-relay/i)?new b(this).init_incoming(e):void 0!==s?new S(this).init_incoming(e):e.reply(415)}else e.reply(403,"Wrong Status");break;case _.UPDATE:this._status===I.STATUS_CONFIRMED?this._receiveUpdate(e):e.reply(403,"Wrong Status");break;case _.REFER:this._status===I.STATUS_CONFIRMED?this._receiveRefer(e):e.reply(403,"Wrong Status");break;case _.NOTIFY:this._status===I.STATUS_CONFIRMED?this._receiveNotify(e):e.reply(403,"Wrong Status");break;default:e.reply(501)}}},{key:"onTransportError",value:function(){w.warn("onTransportError()"),this._status!==I.STATUS_TERMINATED&&this.terminate({status_code:500,reason_phrase:_.causes.CONNECTION_ERROR,cause:_.causes.CONNECTION_ERROR})}},{key:"onRequestTimeout",value:function(){w.warn("onRequestTimeout()"),this._status!==I.STATUS_TERMINATED&&this.terminate({status_code:408,reason_phrase:_.causes.REQUEST_TIMEOUT,cause:_.causes.REQUEST_TIMEOUT})}},{key:"onDialogError",value:function(){w.warn("onDialogError()"),this._status!==I.STATUS_TERMINATED&&this.terminate({status_code:500,reason_phrase:_.causes.DIALOG_ERROR,cause:_.causes.DIALOG_ERROR})}},{key:"newDTMF",value:function(e){w.debug("newDTMF()"),this.emit("newDTMF",e)}},{key:"newInfo",value:function(e){w.debug("newInfo()"),this.emit("newInfo",e)}},{key:"_isReadyToReOffer",value:function(){return this._rtcReady?this._dialog?!0!==this._dialog.uac_pending_reply&&!0!==this._dialog.uas_pending_reply||(w.debug("_isReadyToReOffer() | there is another INVITE/UPDATE transaction in progress"),!1):(w.debug("_isReadyToReOffer() | session not established yet"),!1):(w.debug("_isReadyToReOffer() | internal WebRTC status not ready"),!1)}},{key:"_close",value:function(){if(w.debug("close()"),this._localMediaStream&&this._localMediaStreamLocallyGenerated&&(w.debug("close() | closing local MediaStream"),v.closeMediaStream(this._localMediaStream)),this._status!==I.STATUS_TERMINATED){if(this._status=I.STATUS_TERMINATED,this._connection)try{this._connection.close()}catch(e){w.warn("close() | error closing the RTCPeerConnection: %o",e)}for(var e in this._timers)Object.prototype.hasOwnProperty.call(this._timers,e)&&clearTimeout(this._timers[e]);for(var t in clearTimeout(this._sessionTimers.timer),this._dialog&&(this._dialog.terminate(),delete this._dialog),this._earlyDialogs)Object.prototype.hasOwnProperty.call(this._earlyDialogs,t)&&(this._earlyDialogs[t].terminate(),delete this._earlyDialogs[t]);for(var n in this._referSubscribers)Object.prototype.hasOwnProperty.call(this._referSubscribers,n)&&delete this._referSubscribers[n];this._ua.destroyRTCSession(this)}}},{key:"_setInvite2xxTimer",value:function(e,t){var n=g.T1;this._timers.invite2xxTimer=setTimeout(function r(){this._status===I.STATUS_WAITING_FOR_ACK&&(e.reply(200,null,["Contact: ".concat(this._contact)],t),n<g.T2&&(n*=2)>g.T2&&(n=g.T2),this._timers.invite2xxTimer=setTimeout(r.bind(this),n))}.bind(this),n)}},{key:"_setACKTimer",value:function(){var e=this;this._timers.ackTimer=setTimeout(function(){e._status===I.STATUS_WAITING_FOR_ACK&&(w.debug("no ACK received, terminating the session"),clearTimeout(e._timers.invite2xxTimer),e.sendRequest(_.BYE),e._ended("remote",null,_.causes.NO_ACK))},g.TIMER_H)}},{key:"_createRTCConnection",value:function(e,t){var n=this;this._connection=new RTCPeerConnection(e,t),this._connection.addEventListener("iceconnectionstatechange",function(){"failed"===n._connection.iceConnectionState&&n.terminate({cause:_.causes.RTP_TIMEOUT,status_code:408,reason_phrase:_.causes.RTP_TIMEOUT})}),w.debug('emit "peerconnection"'),this.emit("peerconnection",{peerconnection:this._connection})}},{key:"_createLocalDescription",value:function(e,t){var n=this;if(w.debug("createLocalDescription()"),"offer"!==e&&"answer"!==e)throw new Error('createLocalDescription() | invalid type "'.concat(e,'"'));var r=this._connection;return this._rtcReady=!1,Promise.resolve().then(function(){return"offer"===e?r.createOffer(t).catch(function(e){return w.warn('emit "peerconnection:createofferfailed" [error:%o]',e),n.emit("peerconnection:createofferfailed",e),Promise.reject(e)}):r.createAnswer(t).catch(function(e){return w.warn('emit "peerconnection:createanswerfailed" [error:%o]',e),n.emit("peerconnection:createanswerfailed",e),Promise.reject(e)})}).then(function(e){return r.setLocalDescription(e).catch(function(e){return n._rtcReady=!0,w.warn('emit "peerconnection:setlocaldescriptionfailed" [error:%o]',e),n.emit("peerconnection:setlocaldescriptionfailed",e),Promise.reject(e)})}).then(function(){var s=t&&t.iceRestart;if("complete"===r.iceGatheringState&&!s||"gathering"===r.iceGatheringState&&n._iceReady){n._rtcReady=!0;var i={originator:"local",type:e,sdp:r.localDescription.sdp};return w.debug('emit "sdp"'),n.emit("sdp",i),Promise.resolve(i.sdp)}return new Promise(function(t){var s,i,o=!1;n._iceReady=!1;var l=function(){r.removeEventListener("icecandidate",s),r.removeEventListener("icegatheringstatechange",i),o=!0,n._rtcReady=!0,n._iceReady=!0;var l={originator:"local",type:e,sdp:r.localDescription.sdp};w.debug('emit "sdp"'),n.emit("sdp",l),t(l.sdp)};r.addEventListener("icecandidate",s=function(e){var t=e.candidate;t?n.emit("icecandidate",{candidate:t,ready:l}):o||l()}),r.addEventListener("icegatheringstatechange",i=function(){"complete"!==r.iceGatheringState||o||l()})})})}},{key:"_createDialog",value:function(e,t,n){var r="UAS"===t?e.to_tag:e.from_tag,s="UAS"===t?e.from_tag:e.to_tag,i=e.call_id+r+s,o=this._earlyDialogs[i];if(n)return!!o||((o=new T(this,e,t,T.C.STATUS_EARLY)).error?(w.debug(o.error),this._failed("remote",e,_.causes.INTERNAL_ERROR),!1):(this._earlyDialogs[i]=o,!0));if(this._from_tag=e.from_tag,this._to_tag=e.to_tag,o)return o.update(e,t),this._dialog=o,delete this._earlyDialogs[i],!0;var l=new T(this,e,t);return l.error?(w.debug(l.error),this._failed("remote",e,_.causes.INTERNAL_ERROR),!1):(this._dialog=l,!0)}},{key:"_receiveReinvite",value:function(e){var t=this;w.debug("receiveReinvite()");var n=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0,r={request:e,callback:void 0,reject:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};s=!0;var n=t.status_code||403,r=t.reason_phrase||"",i=v.cloneArray(t.extraHeaders);if(this._status!==I.STATUS_CONFIRMED)return!1;if(n<300||n>=700)throw new TypeError("Invalid status_code: ".concat(n));e.reply(n,r,i)}.bind(this)},s=!1;if(this.emit("reinvite",r),!s){if(this._late_sdp=!1,!e.body)return this._late_sdp=!0,this._remoteHold&&(this._remoteHold=!1,this._onunhold("remote")),void(this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._createLocalDescription("offer",t._rtcOfferConstraints)}).then(function(e){i.call(t,e)}).catch(function(){e.reply(500)}));if("application/sdp"!==n)return w.debug("invalid Content-Type"),void e.reply(415);this._processInDialogSdpOffer(e).then(function(e){t._status!==I.STATUS_TERMINATED&&i.call(t,e)}).catch(function(e){w.warn(e)})}function i(t){var n=this,s=["Contact: ".concat(this._contact)];this._handleSessionTimersInIncomingRequest(e,s),this._late_sdp&&(t=this._mangleOffer(t)),e.reply(200,null,s,t,function(){n._status=I.STATUS_WAITING_FOR_ACK,n._setInvite2xxTimer(e,t),n._setACKTimer()}),"function"==typeof r.callback&&r.callback()}}},{key:"_receiveUpdate",value:function(e){var t=this;w.debug("receiveUpdate()");var n=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0,r={request:e,callback:void 0,reject:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};s=!0;var n=t.status_code||403,r=t.reason_phrase||"",i=v.cloneArray(t.extraHeaders);if(this._status!==I.STATUS_CONFIRMED)return!1;if(n<300||n>=700)throw new TypeError("Invalid status_code: ".concat(n));e.reply(n,r,i)}.bind(this)},s=!1;if(this.emit("update",r),!s)if(e.body){if("application/sdp"!==n)return w.debug("invalid Content-Type"),void e.reply(415);this._processInDialogSdpOffer(e).then(function(e){t._status!==I.STATUS_TERMINATED&&i.call(t,e)}).catch(function(e){w.warn(e)})}else i.call(this,null);function i(t){var n=["Contact: ".concat(this._contact)];this._handleSessionTimersInIncomingRequest(e,n),e.reply(200,null,n,t),"function"==typeof r.callback&&r.callback()}}},{key:"_processInDialogSdpOffer",value:function(e){var t=this;w.debug("_processInDialogSdpOffer()");var n,r=e.parseSDP(),i=!1,o=s(r.media);try{for(o.s();!(n=o.n()).done;){var l=n.value;if(-1!==O.indexOf(l.type)){var u=l.direction||r.direction||"sendrecv";if("sendonly"!==u&&"inactive"!==u){i=!1;break}i=!0}}}catch(e){o.e(e)}finally{o.f()}var a={originator:"remote",type:"offer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",a);var c=new RTCSessionDescription({type:"offer",sdp:a.sdp});return this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){if(t._status===I.STATUS_TERMINATED)throw new Error("terminated");return t._connection.setRemoteDescription(c).catch(function(n){throw e.reply(488),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',n),t.emit("peerconnection:setremotedescriptionfailed",n),n})}).then(function(){if(t._status===I.STATUS_TERMINATED)throw new Error("terminated");!0===t._remoteHold&&!1===i?(t._remoteHold=!1,t._onunhold("remote")):!1===t._remoteHold&&!0===i&&(t._remoteHold=!0,t._onhold("remote"))}).then(function(){if(t._status===I.STATUS_TERMINATED)throw new Error("terminated");return t._createLocalDescription("answer",t._rtcAnswerConstraints).catch(function(t){throw e.reply(500),w.warn('emit "peerconnection:createtelocaldescriptionfailed" [error:%o]',t),t})}).catch(function(e){w.warn("_processInDialogSdpOffer() failed [error: %o]",e)}),this._connectionPromiseQueue}},{key:"_receiveRefer",value:function(e){var t=this;if(w.debug("receiveRefer()"),!e.refer_to)return w.debug("no Refer-To header field present in REFER"),void e.reply(400);if(e.refer_to.uri.scheme!==_.SIP)return w.debug("Refer-To header field points to a non-SIP URI scheme"),void e.reply(416);e.reply(202);var r=new E(this,e.cseq);w.debug('emit "refer"'),this.emit("refer",{request:e,accept:function(s,i){(function(t){var s=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};if(t="function"==typeof t?t:null,this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;var i=new n(this._ua);if(i.on("progress",function(e){var t=e.response;r.notify(t.status_code,t.reason_phrase)}),i.on("accepted",function(e){var t=e.response;r.notify(t.status_code,t.reason_phrase)}),i.on("_failed",function(e){var t=e.message,n=e.cause;t?r.notify(t.status_code,t.reason_phrase):r.notify(487,n)}),e.refer_to.uri.hasHeader("replaces")){var o=decodeURIComponent(e.refer_to.uri.getHeader("replaces"));s.extraHeaders=v.cloneArray(s.extraHeaders),s.extraHeaders.push("Replaces: ".concat(o))}i.connect(e.refer_to.uri.toAor(),s,t)}).call(t,s,i)},reject:function(){(function(){r.notify(603)}).call(t)}})}},{key:"_receiveNotify",value:function(e){switch(w.debug("receiveNotify()"),e.event||e.reply(400),e.event.event){case"refer":var t,n;if(e.event.params&&e.event.params.id)t=e.event.params.id,n=this._referSubscribers[t];else{if(1!==Object.keys(this._referSubscribers).length)return void e.reply(400,"Missing event id parameter");n=this._referSubscribers[Object.keys(this._referSubscribers)[0]]}if(!n)return void e.reply(481,"Subscription does not exist");n.receiveNotify(e),e.reply(200);break;default:e.reply(489)}}},{key:"_receiveReplaces",value:function(e){var t=this;w.debug("receiveReplaces()"),this.emit("replaces",{request:e,accept:function(r){(function(t){var r=this;if(this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;var s=new n(this._ua);s.on("confirmed",function(){r.terminate()}),s.init_incoming(e,t)}).call(t,r)},reject:function(){(function(){w.debug("Replaced INVITE rejected by the user"),e.reply(486)}).call(t)}})}},{key:"_sendInitialRequest",value:function(e,t,n){var r=this,s=new C(this._ua,this._request,{onRequestTimeout:function(){r.onRequestTimeout()},onTransportError:function(){r.onTransportError()},onAuthenticated:function(e){r._request=e},onReceiveResponse:function(e){r._receiveInviteResponse(e)}});Promise.resolve().then(function(){return n||(e.audio||e.video?(r._localMediaStreamLocallyGenerated=!0,navigator.mediaDevices.getUserMedia(e).catch(function(e){if(r._status===I.STATUS_TERMINATED)throw new Error("terminated");throw r._failed("local",null,_.causes.USER_DENIED_MEDIA_ACCESS),w.warn('emit "getusermediafailed" [error:%o]',e),r.emit("getusermediafailed",e),e})):void 0)}).then(function(e){if(r._status===I.STATUS_TERMINATED)throw new Error("terminated");return r._localMediaStream=e,e&&e.getTracks().forEach(function(t){r._connection.addTrack(t,e)}),r._connecting(r._request),r._createLocalDescription("offer",t).catch(function(e){throw r._failed("local",null,_.causes.WEBRTC_ERROR),e})}).then(function(e){if(r._is_canceled||r._status===I.STATUS_TERMINATED)throw new Error("terminated");r._request.body=e,r._status=I.STATUS_INVITE_SENT,w.debug('emit "sending" [request:%o]',r._request),r.emit("sending",{request:r._request}),s.send()}).catch(function(e){r._status!==I.STATUS_TERMINATED&&w.warn(e)})}},{key:"_getDTMFRTPSender",value:function(){var e=this._connection.getSenders().find(function(e){return e.track&&"audio"===e.track.kind});if(e&&e.dtmf)return e.dtmf;w.warn("sendDTMF() | no local audio track to send DTMF with")}},{key:"_receiveInviteResponse",value:function(e){var t=this;if(w.debug("receiveInviteResponse()"),this._dialog&&e.status_code>=200&&e.status_code<=299){if(this._dialog.id.call_id===e.call_id&&this._dialog.id.local_tag===e.from_tag&&this._dialog.id.remote_tag===e.to_tag)return void this.sendRequest(_.ACK);var n=new T(this,e,"UAC");return void 0!==n.error?void w.debug(n.error):(this.sendRequest(_.ACK),void this.sendRequest(_.BYE))}if(this._is_canceled)e.status_code>=100&&e.status_code<200?this._request.cancel(this._cancel_reason):e.status_code>=200&&e.status_code<299&&this._acceptAndTerminate(e);else if(this._status===I.STATUS_INVITE_SENT||this._status===I.STATUS_1XX_RECEIVED)switch(!0){case/^100$/.test(e.status_code):this._status=I.STATUS_1XX_RECEIVED;break;case/^1[0-9]{2}$/.test(e.status_code):if(!e.to_tag){w.debug("1xx response received without to tag");break}if(e.hasHeader("contact")&&!this._createDialog(e,"UAC",!0))break;if(this._status=I.STATUS_1XX_RECEIVED,!e.body){this._progress("remote",e);break}var r={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",r);var s=new RTCSessionDescription({type:"answer",sdp:r.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(s)}).then(function(){return t._progress("remote",e)}).catch(function(e){w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)});break;case/^2[0-9]{2}$/.test(e.status_code):if(this._status=I.STATUS_CONFIRMED,!e.body){this._acceptAndTerminate(e,400,_.causes.MISSING_SDP),this._failed("remote",e,_.causes.BAD_MEDIA_DESCRIPTION);break}if(!this._createDialog(e,"UAC"))break;var i={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",i);var o=new RTCSessionDescription({type:"answer",sdp:i.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){if("stable"===t._connection.signalingState)return t._connection.createOffer(t._rtcOfferConstraints).then(function(e){return t._connection.setLocalDescription(e)}).catch(function(n){t._acceptAndTerminate(e,500,n.toString()),t._failed("local",e,_.causes.WEBRTC_ERROR)})}).then(function(){t._connection.setRemoteDescription(o).then(function(){t._handleSessionTimersInIncomingResponse(e),t._accepted("remote",e),t.sendRequest(_.ACK),t._confirmed("local",null)}).catch(function(n){t._acceptAndTerminate(e,488,"Not Acceptable Here"),t._failed("remote",e,_.causes.BAD_MEDIA_DESCRIPTION),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',n),t.emit("peerconnection:setremotedescriptionfailed",n)})});break;default:var l=v.sipErrorCause(e.status_code);this._failed("remote",e,l)}}},{key:"_sendReinvite",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("sendReinvite()");var n=v.cloneArray(t.extraHeaders),r=v.cloneObject(t.eventHandlers),s=t.rtcOfferConstraints||this._rtcOfferConstraints||null,i=!1;function o(e){r.failed&&r.failed(e)}n.push("Contact: ".concat(this._contact)),n.push("Content-Type: application/sdp"),this._sessionTimers.running&&n.push("Session-Expires: ".concat(this._sessionTimers.currentExpires,";refresher=").concat(this._sessionTimers.refresher?"uac":"uas")),this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return e._createLocalDescription("offer",s)}).then(function(t){var s={originator:"local",type:"offer",sdp:t=e._mangleOffer(t)};w.debug('emit "sdp"'),e.emit("sdp",s),e.sendRequest(_.INVITE,{extraHeaders:n,body:t,eventHandlers:{onSuccessResponse:function(t){(function(e){var t=this;if(this._status===I.STATUS_TERMINATED)return;if(this.sendRequest(_.ACK),i)return;if(this._handleSessionTimersInIncomingResponse(e),!e.body)return void o.call(this);if(!e.hasHeader("Content-Type")||"application/sdp"!==e.getHeader("Content-Type").toLowerCase())return void o.call(this);var n={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",n);var s=new RTCSessionDescription({type:"answer",sdp:n.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(s)}).then(function(){r.succeeded&&r.succeeded(e)}).catch(function(e){o.call(t),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)})}).call(e,t),i=!0},onErrorResponse:function(t){o.call(e,t)},onTransportError:function(){e.onTransportError()},onRequestTimeout:function(){e.onRequestTimeout()},onDialogError:function(){e.onDialogError()}}})}).catch(function(){o()})}},{key:"_sendUpdate",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("sendUpdate()");var n=v.cloneArray(t.extraHeaders),r=v.cloneObject(t.eventHandlers),s=t.rtcOfferConstraints||this._rtcOfferConstraints||null,i=t.sdpOffer||!1,o=!1;function l(e){var t=this;if(this._status!==I.STATUS_TERMINATED&&!o)if(this._handleSessionTimersInIncomingResponse(e),i){if(!e.body)return void u.call(this);if(!e.hasHeader("Content-Type")||"application/sdp"!==e.getHeader("Content-Type").toLowerCase())return void u.call(this);var n={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",n);var s=new RTCSessionDescription({type:"answer",sdp:n.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(s)}).then(function(){r.succeeded&&r.succeeded(e)}).catch(function(e){u.call(t),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)})}else r.succeeded&&r.succeeded(e)}function u(e){r.failed&&r.failed(e)}n.push("Contact: ".concat(this._contact)),this._sessionTimers.running&&n.push("Session-Expires: ".concat(this._sessionTimers.currentExpires,";refresher=").concat(this._sessionTimers.refresher?"uac":"uas")),i?(n.push("Content-Type: application/sdp"),this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return e._createLocalDescription("offer",s)}).then(function(t){var r={originator:"local",type:"offer",sdp:t=e._mangleOffer(t)};w.debug('emit "sdp"'),e.emit("sdp",r),e.sendRequest(_.UPDATE,{extraHeaders:n,body:t,eventHandlers:{onSuccessResponse:function(t){l.call(e,t),o=!0},onErrorResponse:function(t){u.call(e,t)},onTransportError:function(){e.onTransportError()},onRequestTimeout:function(){e.onRequestTimeout()},onDialogError:function(){e.onDialogError()}}})}).catch(function(){u.call(e)})):this.sendRequest(_.UPDATE,{extraHeaders:n,eventHandlers:{onSuccessResponse:function(t){l.call(e,t)},onErrorResponse:function(t){u.call(e,t)},onTransportError:function(){e.onTransportError()},onRequestTimeout:function(){e.onRequestTimeout()},onDialogError:function(){e.onDialogError()}}})}},{key:"_acceptAndTerminate",value:function(e,t,n){w.debug("acceptAndTerminate()");var r=[];t&&(n=n||_.REASON_PHRASE[t]||"",r.push("Reason: SIP ;cause=".concat(t,'; text="').concat(n,'"'))),(this._dialog||this._createDialog(e,"UAC"))&&(this.sendRequest(_.ACK),this.sendRequest(_.BYE,{extraHeaders:r})),this._status=I.STATUS_TERMINATED}},{key:"_mangleOffer",value:function(e){if(!this._localHold&&!this._remoteHold)return e;if(e=d.parse(e),this._localHold&&!this._remoteHold){w.debug("mangleOffer() | me on hold, mangling offer");var t,n=s(e.media);try{for(n.s();!(t=n.n()).done;){var r=t.value;-1!==O.indexOf(r.type)&&(r.direction?"sendrecv"===r.direction?r.direction="sendonly":"recvonly"===r.direction&&(r.direction="inactive"):r.direction="sendonly")}}catch(e){n.e(e)}finally{n.f()}}else if(this._localHold&&this._remoteHold){w.debug("mangleOffer() | both on hold, mangling offer");var i,o=s(e.media);try{for(o.s();!(i=o.n()).done;){var l=i.value;-1!==O.indexOf(l.type)&&(l.direction="inactive")}}catch(e){o.e(e)}finally{o.f()}}else if(this._remoteHold){w.debug("mangleOffer() | remote on hold, mangling offer");var u,a=s(e.media);try{for(a.s();!(u=a.n()).done;){var c=u.value;-1!==O.indexOf(c.type)&&(c.direction?"sendrecv"===c.direction?c.direction="recvonly":"recvonly"===c.direction&&(c.direction="inactive"):c.direction="recvonly")}}catch(e){a.e(e)}finally{a.f()}}return d.write(e)}},{key:"_setLocalMediaStatus",value:function(){var e=!0,t=!0;(this._localHold||this._remoteHold)&&(e=!1,t=!1),this._audioMuted&&(e=!1),this._videoMuted&&(t=!1),this._toggleMuteAudio(!e),this._toggleMuteVideo(!t)}},{key:"_handleSessionTimersInIncomingRequest",value:function(e,t){var n;this._sessionTimers.enabled&&(e.session_expires&&e.session_expires>=_.MIN_SESSION_EXPIRES?(this._sessionTimers.currentExpires=e.session_expires,n=e.session_expires_refresher||"uas"):(this._sessionTimers.currentExpires=this._sessionTimers.defaultExpires,n="uas"),t.push("Session-Expires: ".concat(this._sessionTimers.currentExpires,";refresher=").concat(n)),this._sessionTimers.refresher="uas"===n,this._runSessionTimer())}},{key:"_handleSessionTimersInIncomingResponse",value:function(e){var t;this._sessionTimers.enabled&&(e.session_expires&&e.session_expires>=_.MIN_SESSION_EXPIRES?(this._sessionTimers.currentExpires=e.session_expires,t=e.session_expires_refresher||"uac"):(this._sessionTimers.currentExpires=this._sessionTimers.defaultExpires,t="uac"),this._sessionTimers.refresher="uac"===t,this._runSessionTimer())}},{key:"_runSessionTimer",value:function(){var e=this,t=this._sessionTimers.currentExpires;this._sessionTimers.running=!0,clearTimeout(this._sessionTimers.timer),this._sessionTimers.refresher?this._sessionTimers.timer=setTimeout(function(){e._status!==I.STATUS_TERMINATED&&e._isReadyToReOffer()&&(w.debug("runSessionTimer() | sending session refresh request"),e._sessionTimers.refreshMethod===_.UPDATE?e._sendUpdate():e._sendReinvite())},500*t):this._sessionTimers.timer=setTimeout(function(){e._status!==I.STATUS_TERMINATED&&(w.warn("runSessionTimer() | timer expired, terminating the session"),e.terminate({cause:_.causes.REQUEST_TIMEOUT,status_code:408,reason_phrase:"Session Timer Expired"}))},1100*t)}},{key:"_toggleMuteAudio",value:function(e){var t,n=s(this._connection.getSenders().filter(function(e){return e.track&&"audio"===e.track.kind}));try{for(n.s();!(t=n.n()).done;){t.value.track.enabled=!e}}catch(e){n.e(e)}finally{n.f()}}},{key:"_toggleMuteVideo",value:function(e){var t,n=s(this._connection.getSenders().filter(function(e){return e.track&&"video"===e.track.kind}));try{for(n.s();!(t=n.n()).done;){t.value.track.enabled=!e}}catch(e){n.e(e)}finally{n.f()}}},{key:"_newRTCSession",value:function(e,t){w.debug("newRTCSession()"),this._ua.newRTCSession(this,{originator:e,session:this,request:t})}},{key:"_connecting",value:function(e){w.debug("session connecting"),w.debug('emit "connecting"'),this.emit("connecting",{request:e})}},{key:"_progress",value:function(e,t){w.debug("session progress"),w.debug('emit "progress"'),this.emit("progress",{originator:e,response:t||null})}},{key:"_accepted",value:function(e,t){w.debug("session accepted"),this._start_time=new Date,w.debug('emit "accepted"'),this.emit("accepted",{originator:e,response:t||null})}},{key:"_confirmed",value:function(e,t){w.debug("session confirmed"),this._is_confirmed=!0,w.debug('emit "confirmed"'),this.emit("confirmed",{originator:e,ack:t||null})}},{key:"_ended",value:function(e,t,n){w.debug("session ended"),this._end_time=new Date,this._close(),w.debug('emit "ended"'),this.emit("ended",{originator:e,message:t||null,cause:n})}},{key:"_failed",value:function(e,t,n){w.debug("session failed"),w.debug('emit "_failed"'),this.emit("_failed",{originator:e,message:t||null,cause:n}),this._close(),w.debug('emit "failed"'),this.emit("failed",{originator:e,message:t||null,cause:n})}},{key:"_onhold",value:function(e){w.debug("session onhold"),this._setLocalMediaStatus(),w.debug('emit "hold"'),this.emit("hold",{originator:e})}},{key:"_onunhold",value:function(e){w.debug("session onunhold"),this._setLocalMediaStatus(),w.debug('emit "unhold"'),this.emit("unhold",{originator:e})}},{key:"_onmute",value:function(e){var t=e.audio,n=e.video;w.debug("session onmute"),this._setLocalMediaStatus(),w.debug('emit "muted"'),this.emit("muted",{audio:t,video:n})}},{key:"_onunmute",value:function(e){var t=e.audio,n=e.video;w.debug("session onunmute"),this._setLocalMediaStatus(),w.debug('emit "unmuted"'),this.emit("unmuted",{audio:t,video:n})}},{key:"C",get:function(){return I}},{key:"causes",get:function(){return _.causes}},{key:"id",get:function(){return this._id}},{key:"connection",get:function(){return this._connection}},{key:"contact",get:function(){return this._contact}},{key:"direction",get:function(){return this._direction}},{key:"local_identity",get:function(){return this._local_identity}},{key:"remote_identity",get:function(){return this._remote_identity}},{key:"start_time",get:function(){return this._start_time}},{key:"end_time",get:function(){return this._end_time}},{key:"data",get:function(){return this._data},set:function(e){this._data=e}},{key:"status",get:function(){return this._status}}]),n}()},{"./Constants":2,"./Dialog":3,"./Exceptions":6,"./Logger":9,"./RTCSession/DTMF":15,"./RTCSession/Info":16,"./RTCSession/ReferNotifier":17,"./RTCSession/ReferSubscriber":18,"./RequestSender":20,"./SIPMessage":21,"./Timers":23,"./Transactions":24,"./URI":27,"./Utils":28,events:31,"sdp-transform":37}],15:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var u=e("events").EventEmitter,a=e("../Logger"),c=e("../Constants"),h=e("../Exceptions"),d=e("../Utils"),f=new a("RTCSession:DTMF"),_={MIN_DURATION:70,MAX_DURATION:6e3,DEFAULT_DURATION:100,MIN_INTER_TONE_GAP:50,DEFAULT_INTER_TONE_GAP:500};t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(a,u);var t,n,r,l=o(a);function a(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,a),(t=l.call(this))._session=e,t._direction=null,t._tone=null,t._duration=null,t._request=null,t}return t=a,(n=[{key:"send",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};if(void 0===e)throw new TypeError("Not enough arguments");if(this._direction="outgoing",this._session.status!==this._session.C.STATUS_CONFIRMED&&this._session.status!==this._session.C.STATUS_WAITING_FOR_ACK)throw new h.InvalidStateError(this._session.status);var r=d.cloneArray(n.extraHeaders);if(this.eventHandlers=d.cloneObject(n.eventHandlers),"string"==typeof e)e=e.toUpperCase();else{if("number"!=typeof e)throw new TypeError("Invalid tone: ".concat(e));e=e.toString()}if(!e.match(/^[0-9A-DR#*]$/))throw new TypeError("Invalid tone: ".concat(e));this._tone=e,this._duration=n.duration,r.push("Content-Type: application/dtmf-relay");var s="Signal=".concat(this._tone,"\r\n");s+="Duration=".concat(this._duration),this._session.newDTMF({originator:"local",dtmf:this,request:this._request}),this._session.sendRequest(c.INFO,{extraHeaders:r,eventHandlers:{onSuccessResponse:function(e){t.emit("succeeded",{originator:"remote",response:e})},onErrorResponse:function(e){t.eventHandlers.onFailed&&t.eventHandlers.onFailed(),t.emit("failed",{originator:"remote",response:e})},onRequestTimeout:function(){t._session.onRequestTimeout()},onTransportError:function(){t._session.onTransportError()},onDialogError:function(){t._session.onDialogError()}},body:s})}},{key:"init_incoming",value:function(e){var t=/^(Signal\s*?=\s*?)([0-9A-D#*]{1})(\s)?.*/,n=/^(Duration\s?=\s?)([0-9]{1,4})(\s)?.*/;if(this._direction="incoming",this._request=e,e.reply(200),e.body){var r=e.body.split("\n");r.length>=1&&t.test(r[0])&&(this._tone=r[0].replace(t,"$2")),r.length>=2&&n.test(r[1])&&(this._duration=parseInt(r[1].replace(n,"$2"),10))}this._duration||(this._duration=_.DEFAULT_DURATION),this._tone?this._session.newDTMF({originator:"remote",dtmf:this,request:e}):f.debug("invalid INFO DTMF received, discarded")}},{key:"tone",get:function(){return this._tone}},{key:"duration",get:function(){return this._duration}}])&&s(t.prototype,n),r&&s(t,r),a}(),t.exports.C=_},{"../Constants":2,"../Exceptions":6,"../Logger":9,"../Utils":28,events:31}],16:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in 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u=e("events").EventEmitter,a=e("../Constants"),c=e("../Exceptions"),h=e("../Utils");t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(d,u);var t,n,r,l=o(d);function d(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,d),(t=l.call(this))._session=e,t._direction=null,t._contentType=null,t._body=null,t}return t=d,(n=[{key:"send",value:function(e,t){var n=this,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(this._direction="outgoing",void 0===e)throw new TypeError("Not enough arguments");if(this._session.status!==this._session.C.STATUS_CONFIRMED&&this._session.status!==this._session.C.STATUS_WAITING_FOR_ACK)throw new c.InvalidStateError(this._session.status);this._contentType=e,this._body=t;var s=h.cloneArray(r.extraHeaders);s.push("Content-Type: ".concat(e)),this._session.newInfo({originator:"local",info:this,request:this.request}),this._session.sendRequest(a.INFO,{extraHeaders:s,eventHandlers:{onSuccessResponse:function(e){n.emit("succeeded",{originator:"remote",response:e})},onErrorResponse:function(e){n.emit("failed",{originator:"remote",response:e})},onTransportError:function(){n._session.onTransportError()},onRequestTimeout:function(){n._session.onRequestTimeout()},onDialogError:function(){n._session.onDialogError()}},body:t})}},{key:"init_incoming",value:function(e){this._direction="incoming",this.request=e,e.reply(200),this._contentType=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0,this._body=e.body,this._session.newInfo({originator:"remote",info:this,request:e})}},{key:"contentType",get:function(){return this._contentType}},{key:"body",get:function(){return this._body}}])&&s(t.prototype,n),r&&s(t,r),d}()},{"../Constants":2,"../Exceptions":6,"../Utils":28,events:31}],17:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("../Logger"),i=e("../Constants"),o=new s("RTCSession:ReferNotifier"),l={event_type:"refer",body_type:"message/sipfrag;version=2.0",expires:300};t.exports=function(){function e(t,n,r){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._session=t,this._id=n,this._expires=r||l.expires,this._active=!0,this.notify(100)}var t,n,s;return t=e,(n=[{key:"notify",value:function(e,t){var n;(o.debug("notify()"),!1!==this._active)&&(t=t||i.REASON_PHRASE[e]||"",n=e>=200?"terminated;reason=noresource":"active;expires=".concat(this._expires),this._session.sendRequest(i.NOTIFY,{extraHeaders:["Event: ".concat(l.event_type,";id=").concat(this._id),"Subscription-State: ".concat(n),"Content-Type: ".concat(l.body_type)],body:"SIP/2.0 ".concat(e," ").concat(t),eventHandlers:{onErrorResponse:function(){this._active=!1}}}))}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"../Constants":2,"../Logger":9}],18:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var u=e("events").EventEmitter,a=e("../Logger"),c=e("../Constants"),h=e("../Grammar"),d=e("../Utils"),f=new a("RTCSession:ReferSubscriber");t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(a,u);var t,n,r,l=o(a);function a(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,a),(t=l.call(this))._id=null,t._session=e,t}return t=a,(n=[{key:"sendRefer",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};f.debug("sendRefer()");var r=d.cloneArray(n.extraHeaders),s=d.cloneObject(n.eventHandlers);for(var i in s)Object.prototype.hasOwnProperty.call(s,i)&&this.on(i,s[i]);var o=null;n.replaces&&(o=n.replaces._request.call_id,o+=";to-tag=".concat(n.replaces._to_tag),o+=";from-tag=".concat(n.replaces._from_tag),o=encodeURIComponent(o));var l="Refer-To: <".concat(e).concat(o?"?Replaces=".concat(o):"",">");if(r.push(l),!r.some(function(e){return e.toLowerCase().startsWith("referred-by:")})){var u="Referred-By: <".concat(this._session._ua._configuration.uri._scheme,":").concat(this._session._ua._configuration.uri._user,"@").concat(this._session._ua._configuration.uri._host,">");r.push(u)}r.push("Contact: ".concat(this._session.contact));var a=this._session.sendRequest(c.REFER,{extraHeaders:r,eventHandlers:{onSuccessResponse:function(e){t._requestSucceeded(e)},onErrorResponse:function(e){t._requestFailed(e,c.causes.REJECTED)},onTransportError:function(){t._requestFailed(null,c.causes.CONNECTION_ERROR)},onRequestTimeout:function(){t._requestFailed(null,c.causes.REQUEST_TIMEOUT)},onDialogError:function(){t._requestFailed(null,c.causes.DIALOG_ERROR)}}});this._id=a.cseq}},{key:"receiveNotify",value:function(e){if(f.debug("receiveNotify()"),e.body){var t=h.parse(e.body.trim().split("\r\n",1)[0],"Status_Line");if(-1!==t)switch(!0){case/^100$/.test(t.status_code):this.emit("trying",{request:e,status_line:t});break;case/^1[0-9]{2}$/.test(t.status_code):this.emit("progress",{request:e,status_line:t});break;case/^2[0-9]{2}$/.test(t.status_code):this.emit("accepted",{request:e,status_line:t});break;default:this.emit("failed",{request:e,status_line:t})}else f.debug('receiveNotify() | error parsing NOTIFY body: "'.concat(e.body,'"'))}}},{key:"_requestSucceeded",value:function(e){f.debug("REFER succeeded"),f.debug('emit "requestSucceeded"'),this.emit("requestSucceeded",{response:e})}},{key:"_requestFailed",value:function(e,t){f.debug("REFER failed"),f.debug('emit "requestFailed"'),this.emit("requestFailed",{response:e||null,cause:t})}},{key:"id",get:function(){return this._id}}])&&s(t.prototype,n),r&&s(t,r),a}()},{"../Constants":2,"../Grammar":7,"../Logger":9,"../Utils":28,events:31}],19:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("./Logger"),i=e("./Utils"),o=e("./Constants"),l=e("./SIPMessage"),u=e("./RequestSender"),a=new s("Registrator");t.exports=function(){function e(t,n){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._reg_id=1,this._ua=t,this._transport=n,this._registrar=t.configuration.registrar_server,this._expires=t.configuration.register_expires,this._call_id=i.createRandomToken(22),this._cseq=0,this._to_uri=t.configuration.uri,this._registrationTimer=null,this._registering=!1,this._registered=!1,this._contact=this._ua.contact.toString(),this._contact+=";+sip.ice",this._extraHeaders=[],this._extraContactParams="",this._sipInstance='"<urn:uuid:'.concat(this._ua.configuration.instance_id,'>"'),this._contact+=";reg-id=".concat(this._reg_id),this._contact+=";+sip.instance=".concat(this._sipInstance)}var t,n,s;return t=e,(n=[{key:"setExtraHeaders",value:function(e){Array.isArray(e)||(e=[]),this._extraHeaders=e.slice()}},{key:"setExtraContactParams",value:function(e){for(var t in e instanceof Object||(e={}),this._extraContactParams="",e)if(Object.prototype.hasOwnProperty.call(e,t)){var n=e[t];this._extraContactParams+=";".concat(t),n&&(this._extraContactParams+="=".concat(n))}}},{key:"register",value:function(){var e=this;if(this._registering)a.debug("Register request in progress...");else{var t=this._extraHeaders.slice();t.push("Contact: ".concat(this._contact,";expires=").concat(this._expires).concat(this._extraContactParams)),t.push("Expires: ".concat(this._expires));var n=new l.OutgoingRequest(o.REGISTER,this._registrar,this._ua,{to_uri:this._to_uri,call_id:this._call_id,cseq:this._cseq+=1},t),r=new u(this._ua,n,{onRequestTimeout:function(){e._registrationFailure(null,o.causes.REQUEST_TIMEOUT)},onTransportError:function(){e._registrationFailure(null,o.causes.CONNECTION_ERROR)},onAuthenticated:function(){e._cseq+=1},onReceiveResponse:function(t){if(t.cseq===e._cseq)switch(null!==e._registrationTimer&&(clearTimeout(e._registrationTimer),e._registrationTimer=null),!0){case/^1[0-9]{2}$/.test(t.status_code):break;case/^2[0-9]{2}$/.test(t.status_code):if(e._registering=!1,!t.hasHeader("Contact")){a.debug("no Contact header in response to REGISTER, response ignored");break}var n=t.headers.Contact.reduce(function(e,t){return e.concat(t.parsed)},[]),r=n.find(function(t){return e._sipInstance===t.getParam("+sip.instance")&&e._reg_id===parseInt(t.getParam("reg-id"))});if(r||(r=n.find(function(t){return t.uri.user===e._ua.contact.uri.user})),!r){a.debug("no Contact header pointing to us, response ignored");break}var s=r.getParam("expires");!s&&t.hasHeader("expires")&&(s=t.getHeader("expires")),s||(s=e._expires),(s=Number(s))<10&&(s=10);var l=s>64?1e3*s/2+Math.floor(1e3*(s/2-32)*Math.random()):1e3*s-5e3;e._registrationTimer=setTimeout(function(){e._registrationTimer=null,0===e._ua.listeners("registrationExpiring").length?e.register():e._ua.emit("registrationExpiring")},l),r.hasParam("temp-gruu")&&(e._ua.contact.temp_gruu=r.getParam("temp-gruu").replace(/"/g,"")),r.hasParam("pub-gruu")&&(e._ua.contact.pub_gruu=r.getParam("pub-gruu").replace(/"/g,"")),e._registered||(e._registered=!0,e._ua.registered({response:t}));break;case/^423$/.test(t.status_code):t.hasHeader("min-expires")?(e._expires=Number(t.getHeader("min-expires")),e._expires<10&&(e._expires=10),e.register()):(a.debug("423 response received for REGISTER without Min-Expires"),e._registrationFailure(t,o.causes.SIP_FAILURE_CODE));break;default:var u=i.sipErrorCause(t.status_code);e._registrationFailure(t,u)}}});this._registering=!0,r.send()}}},{key:"unregister",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};if(this._registered){this._registered=!1,null!==this._registrationTimer&&(clearTimeout(this._registrationTimer),this._registrationTimer=null);var n=this._extraHeaders.slice();t.all?n.push("Contact: *".concat(this._extraContactParams)):n.push("Contact: ".concat(this._contact,";expires=0").concat(this._extraContactParams)),n.push("Expires: 0");var r=new l.OutgoingRequest(o.REGISTER,this._registrar,this._ua,{to_uri:this._to_uri,call_id:this._call_id,cseq:this._cseq+=1},n);new u(this._ua,r,{onRequestTimeout:function(){e._unregistered(null,o.causes.REQUEST_TIMEOUT)},onTransportError:function(){e._unregistered(null,o.causes.CONNECTION_ERROR)},onAuthenticated:function(){e._cseq+=1},onReceiveResponse:function(t){switch(!0){case/^1[0-9]{2}$/.test(t.status_code):break;case/^2[0-9]{2}$/.test(t.status_code):e._unregistered(t);break;default:var n=i.sipErrorCause(t.status_code);e._unregistered(t,n)}}}).send()}else a.debug("already unregistered")}},{key:"close",value:function(){this._registered&&this.unregister()}},{key:"onTransportClosed",value:function(){this._registering=!1,null!==this._registrationTimer&&(clearTimeout(this._registrationTimer),this._registrationTimer=null),this._registered&&(this._registered=!1,this._ua.unregistered({}))}},{key:"_registrationFailure",value:function(e,t){this._registering=!1,this._ua.registrationFailed({response:e||null,cause:t}),this._registered&&(this._registered=!1,this._ua.unregistered({response:e||null,cause:t}))}},{key:"_unregistered",value:function(e,t){this._registering=!1,this._registered=!1,this._ua.unregistered({response:e||null,cause:t||null})}},{key:"registered",get:function(){return this._registered}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"./Constants":2,"./Logger":9,"./RequestSender":20,"./SIPMessage":21,"./Utils":28}],20:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("./Logger"),i=e("./Constants"),o=e("./DigestAuthentication"),l=e("./Transactions"),u=new s("RequestSender"),a={onRequestTimeout:function(){},onTransportError:function(){},onReceiveResponse:function(){},onAuthenticated:function(){}};t.exports=function(){function e(t,n,r){for(var s in function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._ua=t,this._eventHandlers=r,this._method=n.method,this._request=n,this._auth=null,this._challenged=!1,this._staled=!1,a)Object.prototype.hasOwnProperty.call(a,s)&&(this._eventHandlers[s]||(this._eventHandlers[s]=a[s]));t.status!==t.C.STATUS_USER_CLOSED||this._method===i.BYE&&this._method===i.ACK||this._eventHandlers.onTransportError()}var t,n,s;return t=e,(n=[{key:"send",value:function(){var e=this,t={onRequestTimeout:function(){e._eventHandlers.onRequestTimeout()},onTransportError:function(){e._eventHandlers.onTransportError()},onReceiveResponse:function(t){e._receiveResponse(t)}};switch(this._method){case"INVITE":this.clientTransaction=new l.InviteClientTransaction(this._ua,this._ua.transport,this._request,t);break;case"ACK":this.clientTransaction=new l.AckClientTransaction(this._ua,this._ua.transport,this._request,t);break;default:this.clientTransaction=new l.NonInviteClientTransaction(this._ua,this._ua.transport,this._request,t)}this._ua._configuration.authorization_jwt&&this._request.setHeader("Authorization",this._ua._configuration.authorization_jwt),this.clientTransaction.send()}},{key:"_receiveResponse",value:function(e){var t,n,r=e.status_code;if(401!==r&&407!==r||null===this._ua.configuration.password&&null===this._ua.configuration.ha1)this._eventHandlers.onReceiveResponse(e);else{if(401===e.status_code?(t=e.parseHeader("www-authenticate"),n="authorization"):(t=e.parseHeader("proxy-authenticate"),n="proxy-authorization"),!t)return u.debug("".concat(e.status_code," with wrong or missing challenge, cannot authenticate")),void this._eventHandlers.onReceiveResponse(e);if(!this._challenged||!this._staled&&!0===t.stale){if(this._auth||(this._auth=new o({username:this._ua.configuration.authorization_user,password:this._ua.configuration.password,realm:this._ua.configuration.realm,ha1:this._ua.configuration.ha1})),!this._auth.authenticate(this._request,t))return void this._eventHandlers.onReceiveResponse(e);this._challenged=!0,this._ua.set("realm",this._auth.get("realm")),this._ua.set("ha1",this._auth.get("ha1")),t.stale&&(this._staled=!0),this._request=this._request.clone(),this._request.cseq+=1,this._request.setHeader("cseq","".concat(this._request.cseq," ").concat(this._method)),this._request.setHeader(n,this._auth.toString()),this._eventHandlers.onAuthenticated(this._request),this.send()}else this._eventHandlers.onReceiveResponse(e)}}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"./Constants":2,"./DigestAuthentication":5,"./Logger":9,"./Transactions":24}],21:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}function u(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return a(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return a(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,s=function(){};return{s:s,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:s}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var i,o=!0,l=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return o=e.done,e},e:function(e){l=!0,i=e},f:function(){try{o||null==n.return||n.return()}finally{if(l)throw i}}}}function a(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}function c(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function h(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function d(e,t,n){return t&&h(e.prototype,t),n&&h(e,n),e}var f=e("sdp-transform"),_=e("./Logger"),p=e("./Constants"),m=e("./Utils"),v=e("./NameAddrHeader"),g=e("./Grammar"),y=new _("SIPMessage"),T=function(){function e(t,n,r,s,i,o){if(c(this,e),!t||!n||!r)return null;s=s||{},this.ua=r,this.headers={},this.method=t,this.ruri=n,this.body=o,this.extraHeaders=m.cloneArray(i),this.ua.configuration.extra_headers&&(this.extraHeaders=this.extraHeaders.concat(this.ua.configuration.extra_headers)),s.route_set?this.setHeader("route",s.route_set):r.configuration.use_preloaded_route&&this.setHeader("route","<".concat(r.transport.sip_uri,";lr>")),this.setHeader("via",""),this.setHeader("max-forwards",p.MAX_FORWARDS);var l=s.to_uri||n,u=s.to_tag?{tag:s.to_tag}:null,a=void 0!==s.to_display_name?s.to_display_name:null;this.to=new v(l,a,u),this.setHeader("to",this.to.toString());var h,d=s.from_uri||r.configuration.uri,f={tag:s.from_tag||m.newTag()};h=void 0!==s.from_display_name?s.from_display_name:r.configuration.display_name?r.configuration.display_name:null,this.from=new v(d,h,f),this.setHeader("from",this.from.toString());var _=s.call_id||r.configuration.jssip_id+m.createRandomToken(15);this.call_id=_,this.setHeader("call-id",_);var g=s.cseq||Math.floor(1e4*Math.random());this.cseq=g,this.setHeader("cseq","".concat(g," ").concat(t))}return d(e,[{key:"setHeader",value:function(e,t){for(var n=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),r=0;r<this.extraHeaders.length;r++)n.test(this.extraHeaders[r])&&this.extraHeaders.splice(r,1);this.headers[m.headerize(e)]=Array.isArray(t)?t:[t]}},{key:"getHeader",value:function(e){var t=this.headers[m.headerize(e)];if(t){if(t[0])return t[0]}else{var n,r=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),s=u(this.extraHeaders);try{for(s.s();!(n=s.n()).done;){var i=n.value;if(r.test(i))return i.substring(i.indexOf(":")+1).trim()}}catch(e){s.e(e)}finally{s.f()}}}},{key:"getHeaders",value:function(e){var t=this.headers[m.headerize(e)],n=[];if(t){var r,s=u(t);try{for(s.s();!(r=s.n()).done;){var i=r.value;n.push(i)}}catch(e){s.e(e)}finally{s.f()}return n}var o,l=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),a=u(this.extraHeaders);try{for(a.s();!(o=a.n()).done;){var c=o.value;l.test(c)&&n.push(c.substring(c.indexOf(":")+1).trim())}}catch(e){a.e(e)}finally{a.f()}return n}},{key:"hasHeader",value:function(e){if(this.headers[m.headerize(e)])return!0;var t,n=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),r=u(this.extraHeaders);try{for(r.s();!(t=r.n()).done;){var s=t.value;if(n.test(s))return!0}}catch(e){r.e(e)}finally{r.f()}return!1}},{key:"parseSDP",value:function(e){return!e&&this.sdp?this.sdp:(this.sdp=f.parse(this.body||""),this.sdp)}},{key:"toString",value:function(){var e="".concat(this.method," ").concat(this.ruri," SIP/2.0\r\n");for(var t in this.headers)if(Object.prototype.hasOwnProperty.call(this.headers,t)){var n,r=u(this.headers[t]);try{for(r.s();!(n=r.n()).done;){var s=n.value;e+="".concat(t,": ").concat(s,"\r\n")}}catch(e){r.e(e)}finally{r.f()}}var i,o=u(this.extraHeaders);try{for(o.s();!(i=o.n()).done;){var l=i.value;e+="".concat(l.trim(),"\r\n")}}catch(e){o.e(e)}finally{o.f()}var a=[];switch(this.method){case p.REGISTER:a.push("path","gruu");break;case p.INVITE:this.ua.configuration.session_timers&&a.push("timer"),(this.ua.contact.pub_gruu||this.ua.contact.temp_gruu)&&a.push("gruu"),a.push("ice","replaces");break;case p.UPDATE:this.ua.configuration.session_timers&&a.push("timer"),a.push("ice")}a.push("outbound");var c=this.ua.configuration.user_agent||p.USER_AGENT;if(e+="Allow: ".concat(p.ALLOWED_METHODS,"\r\n"),e+="Supported: ".concat(a,"\r\n"),e+="User-Agent: ".concat(c,"\r\n"),this.body){var h=m.str_utf8_length(this.body);e+="Content-Length: ".concat(h,"\r\n\r\n"),e+=this.body}else e+="Content-Length: 0\r\n\r\n";return e}},{key:"clone",value:function(){var t=new e(this.method,this.ruri,this.ua);return Object.keys(this.headers).forEach(function(e){t.headers[e]=this.headers[e].slice()},this),t.body=this.body,t.extraHeaders=m.cloneArray(this.extraHeaders),t.to=this.to,t.from=this.from,t.call_id=this.call_id,t.cseq=this.cseq,t}}]),e}(),C=function(e){s(n,T);var t=o(n);function n(e,r,s,i,o){var l;return c(this,n),(l=t.call(this,p.INVITE,e,r,s,i,o)).transaction=null,l}return d(n,[{key:"cancel",value:function(e){this.transaction.cancel(e)}},{key:"clone",value:function(){var e=new n(this.ruri,this.ua);return Object.keys(this.headers).forEach(function(t){e.headers[t]=this.headers[t].slice()},this),e.body=this.body,e.extraHeaders=m.cloneArray(this.extraHeaders),e.to=this.to,e.from=this.from,e.call_id=this.call_id,e.cseq=this.cseq,e.transaction=this.transaction,e}}]),n}(),b=function(){function e(){c(this,e),this.data=null,this.headers=null,this.method=null,this.via=null,this.via_branch=null,this.call_id=null,this.cseq=null,this.from=null,this.from_tag=null,this.to=null,this.to_tag=null,this.body=null,this.sdp=null}return d(e,[{key:"addHeader",value:function(e,t){var n={raw:t};e=m.headerize(e),this.headers[e]?this.headers[e].push(n):this.headers[e]=[n]}},{key:"getHeader",value:function(e){var t=this.headers[m.headerize(e)];if(t)return t[0]?t[0].raw:void 0}},{key:"getHeaders",value:function(e){var t=this.headers[m.headerize(e)],n=[];if(!t)return[];var r,s=u(t);try{for(s.s();!(r=s.n()).done;){var i=r.value;n.push(i.raw)}}catch(e){s.e(e)}finally{s.f()}return n}},{key:"hasHeader",value:function(e){return!!this.headers[m.headerize(e)]}},{key:"parseHeader",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0;if(e=m.headerize(e),this.headers[e]){if(!(t>=this.headers[e].length)){var n=this.headers[e][t],r=n.raw;if(n.parsed)return n.parsed;var s=g.parse(r,e.replace(/-/g,"_"));return-1===s?(this.headers[e].splice(t,1),void y.debug('error parsing "'.concat(e,'" header field with value "').concat(r,'"'))):(n.parsed=s,s)}y.debug('not so many "'.concat(e,'" headers present'))}else y.debug('header "'.concat(e,'" not present'))}},{key:"s",value:function(e,t){return this.parseHeader(e,t)}},{key:"setHeader",value:function(e,t){var n={raw:t};this.headers[m.headerize(e)]=[n]}},{key:"parseSDP",value:function(e){return!e&&this.sdp?this.sdp:(this.sdp=f.parse(this.body||""),this.sdp)}},{key:"toString",value:function(){return this.data}}]),e}(),S=function(e){s(n,b);var t=o(n);function n(e){var r;return c(this,n),(r=t.call(this)).ua=e,r.headers={},r.ruri=null,r.transport=null,r.server_transaction=null,r}return d(n,[{key:"reply",value:function(e,t,n,r,s,i){var o=[],l=this.getHeader("To");if(t=t||null,!(e=e||null)||e<100||e>699)throw new TypeError("Invalid status_code: ".concat(e));if(t&&"string"!=typeof t&&!(t instanceof String))throw new TypeError("Invalid reason_phrase: ".concat(t));t=t||p.REASON_PHRASE[e]||"",n=m.cloneArray(n),this.ua.configuration.extra_headers&&(n=n.concat(this.ua.configuration.extra_headers));var a="SIP/2.0 ".concat(e," ").concat(t,"\r\n");if(this.method===p.INVITE&&e>100&&e<=200){var c,h=u(this.getHeaders("record-route"));try{for(h.s();!(c=h.n()).done;){var d=c.value;a+="Record-Route: ".concat(d,"\r\n")}}catch(e){h.e(e)}finally{h.f()}}var f,_=u(this.getHeaders("via"));try{for(_.s();!(f=_.n()).done;){var v=f.value;a+="Via: ".concat(v,"\r\n")}}catch(e){_.e(e)}finally{_.f()}!this.to_tag&&e>100?l+=";tag=".concat(m.newTag()):this.to_tag&&!this.s("to").hasParam("tag")&&(l+=";tag=".concat(this.to_tag)),a+="To: ".concat(l,"\r\n"),a+="From: ".concat(this.getHeader("From"),"\r\n"),a+="Call-ID: ".concat(this.call_id,"\r\n"),a+="CSeq: ".concat(this.cseq," ").concat(this.method,"\r\n");var g,y=u(n);try{for(y.s();!(g=y.n()).done;){var T=g.value;a+="".concat(T.trim(),"\r\n")}}catch(e){y.e(e)}finally{y.f()}switch(this.method){case p.INVITE:this.ua.configuration.session_timers&&o.push("timer"),(this.ua.contact.pub_gruu||this.ua.contact.temp_gruu)&&o.push("gruu"),o.push("ice","replaces");break;case p.UPDATE:this.ua.configuration.session_timers&&o.push("timer"),r&&o.push("ice"),o.push("replaces")}if(o.push("outbound"),this.method===p.OPTIONS?(a+="Allow: ".concat(p.ALLOWED_METHODS,"\r\n"),a+="Accept: ".concat(p.ACCEPTED_BODY_TYPES,"\r\n")):405===e?a+="Allow: ".concat(p.ALLOWED_METHODS,"\r\n"):415===e&&(a+="Accept: ".concat(p.ACCEPTED_BODY_TYPES,"\r\n")),a+="Supported: ".concat(o,"\r\n"),r){var C=m.str_utf8_length(r);a+="Content-Type: application/sdp\r\n",a+="Content-Length: ".concat(C,"\r\n\r\n"),a+=r}else a+="Content-Length: ".concat(0,"\r\n\r\n");this.server_transaction.receiveResponse(e,a,s,i)}},{key:"reply_sl",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,n=this.getHeaders("via");if(!e||e<100||e>699)throw new TypeError("Invalid status_code: ".concat(e));if(t&&"string"!=typeof t&&!(t instanceof String))throw new TypeError("Invalid reason_phrase: ".concat(t));t=t||p.REASON_PHRASE[e]||"";var r,s="SIP/2.0 ".concat(e," ").concat(t,"\r\n"),i=u(n);try{for(i.s();!(r=i.n()).done;){var o=r.value;s+="Via: ".concat(o,"\r\n")}}catch(e){i.e(e)}finally{i.f()}var l=this.getHeader("To");if(!this.to_tag&&e>100?l+=";tag=".concat(m.newTag()):this.to_tag&&!this.s("to").hasParam("tag")&&(l+=";tag=".concat(this.to_tag)),s+="To: ".concat(l,"\r\n"),s+="From: ".concat(this.getHeader("From"),"\r\n"),s+="Call-ID: ".concat(this.call_id,"\r\n"),s+="CSeq: ".concat(this.cseq," ").concat(this.method,"\r\n"),this.ua.configuration.extra_headers){var a,c=u(this.ua.configuration.extra_headers);try{for(c.s();!(a=c.n()).done;){var h=a.value;s+="".concat(h.trim(),"\r\n")}}catch(e){c.e(e)}finally{c.f()}}s+="Content-Length: ".concat(0,"\r\n\r\n"),this.transport.send(s)}}]),n}(),E=function(e){s(n,b);var t=o(n);function n(){var e;return c(this,n),(e=t.call(this)).headers={},e.status_code=null,e.reason_phrase=null,e}return n}();t.exports={OutgoingRequest:T,InitialOutgoingInviteRequest:C,IncomingRequest:S,IncomingResponse:E}},{"./Constants":2,"./Grammar":7,"./Logger":9,"./NameAddrHeader":11,"./Utils":28,"sdp-transform":37}],22:[function(e,t,n){"use strict";var r=e("./Logger"),s=e("./Utils"),i=e("./Grammar"),o=new r("Socket");n.isSocket=function(e){if(Array.isArray(e))return!1;if(void 0===e)return o.warn("undefined JsSIP.Socket instance"),!1;try{if(!s.isString(e.url))throw o.warn("missing or invalid JsSIP.Socket url property"),new Error("Missing or invalid JsSIP.Socket url property");if(!s.isString(e.via_transport))throw o.warn("missing or invalid JsSIP.Socket via_transport property"),new Error("Missing or invalid JsSIP.Socket via_transport property");if(-1===i.parse(e.sip_uri,"SIP_URI"))throw o.warn("missing or invalid JsSIP.Socket sip_uri property"),new Error("missing or invalid JsSIP.Socket sip_uri property")}catch(e){return!1}try{["connect","disconnect","send"].forEach(function(t){if(!s.isFunction(e[t]))throw o.warn("missing or invalid JsSIP.Socket method: ".concat(t)),new Error("Missing or invalid JsSIP.Socket method: ".concat(t))})}catch(e){return!1}return!0}},{"./Grammar":7,"./Logger":9,"./Utils":28}],23:[function(e,t,n){"use strict";var r=500;t.exports={T1:r,T2:4e3,T4:5e3,TIMER_B:32e3,TIMER_D:0,TIMER_F:32e3,TIMER_H:32e3,TIMER_I:0,TIMER_J:0,TIMER_K:0,TIMER_L:32e3,TIMER_M:32e3,PROVISIONAL_RESPONSE_INTERVAL:6e4}},{}],24:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function i(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function o(e,t,n){return t&&i(e.prototype,t),n&&i(e,n),e}function l(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&u(e,t)}function u(e,t){return(u=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function a(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=h(e);if(t){var i=h(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return c(e)}(this,n)}}function c(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}function h(e){return(h=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var d=e("events").EventEmitter,f=e("./Logger"),_=e("./Constants"),p=e("./SIPMessage"),m=e("./Timers"),v=new f("NonInviteClientTransaction"),g=new f("InviteClientTransaction"),y=new f("AckClientTransaction"),T=new f("NonInviteServerTransaction"),C=new f("InviteServerTransaction"),b={STATUS_TRYING:1,STATUS_PROCEEDING:2,STATUS_CALLING:3,STATUS_ACCEPTED:4,STATUS_COMPLETED:5,STATUS_TERMINATED:6,STATUS_CONFIRMED:7,NON_INVITE_CLIENT:"nict",NON_INVITE_SERVER:"nist",INVITE_CLIENT:"ict",INVITE_SERVER:"ist"},S=function(e){l(n,d);var t=a(n);function n(e,r,i,o){var l;s(this,n),(l=t.call(this)).type=b.NON_INVITE_CLIENT,l.id="z9hG4bK".concat(Math.floor(1e7*Math.random())),l.ua=e,l.transport=r,l.request=i,l.eventHandlers=o;var u="SIP/2.0/".concat(r.via_transport);return u+=" ".concat(e.configuration.via_host,";branch=").concat(l.id),l.request.setHeader("via",u),l.ua.newTransaction(c(l)),l}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"send",value:function(){var e=this;this.stateChanged(b.STATUS_TRYING),this.F=setTimeout(function(){e.timer_F()},m.TIMER_F),this.transport.send(this.request)||this.onTransportError()}},{key:"onTransportError",value:function(){v.debug("transport error occurred, deleting transaction ".concat(this.id)),clearTimeout(this.F),clearTimeout(this.K),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this),this.eventHandlers.onTransportError()}},{key:"timer_F",value:function(){v.debug("Timer F expired for transaction ".concat(this.id)),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this),this.eventHandlers.onRequestTimeout()}},{key:"timer_K",value:function(){this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"receiveResponse",value:function(e){var t=this,n=e.status_code;if(n<200)switch(this.state){case b.STATUS_TRYING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_PROCEEDING),this.eventHandlers.onReceiveResponse(e)}else switch(this.state){case b.STATUS_TRYING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_COMPLETED),clearTimeout(this.F),408===n?this.eventHandlers.onRequestTimeout():this.eventHandlers.onReceiveResponse(e),this.K=setTimeout(function(){t.timer_K()},m.TIMER_K);break;case b.STATUS_COMPLETED:}}},{key:"C",get:function(){return b}}]),n}(),E=function(e){l(n,d);var t=a(n);function n(e,r,i,o){var l;s(this,n),(l=t.call(this)).type=b.INVITE_CLIENT,l.id="z9hG4bK".concat(Math.floor(1e7*Math.random())),l.ua=e,l.transport=r,l.request=i,l.eventHandlers=o,i.transaction=c(l);var u="SIP/2.0/".concat(r.via_transport);return u+=" ".concat(e.configuration.via_host,";branch=").concat(l.id),l.request.setHeader("via",u),l.ua.newTransaction(c(l)),l}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"send",value:function(){var e=this;this.stateChanged(b.STATUS_CALLING),this.B=setTimeout(function(){e.timer_B()},m.TIMER_B),this.transport.send(this.request)||this.onTransportError()}},{key:"onTransportError",value:function(){clearTimeout(this.B),clearTimeout(this.D),clearTimeout(this.M),this.state!==b.STATUS_ACCEPTED&&(g.debug("transport error occurred, deleting transaction ".concat(this.id)),this.eventHandlers.onTransportError()),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"timer_M",value:function(){g.debug("Timer M expired for transaction ".concat(this.id)),this.state===b.STATUS_ACCEPTED&&(clearTimeout(this.B),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"timer_B",value:function(){g.debug("Timer B expired for transaction ".concat(this.id)),this.state===b.STATUS_CALLING&&(this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this),this.eventHandlers.onRequestTimeout())}},{key:"timer_D",value:function(){g.debug("Timer D expired for transaction ".concat(this.id)),clearTimeout(this.B),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"sendACK",value:function(e){var t=this,n=new p.OutgoingRequest(_.ACK,this.request.ruri,this.ua,{route_set:this.request.getHeaders("route"),call_id:this.request.getHeader("call-id"),cseq:this.request.cseq});n.setHeader("from",this.request.getHeader("from")),n.setHeader("via",this.request.getHeader("via")),n.setHeader("to",e.getHeader("to")),this.D=setTimeout(function(){t.timer_D()},m.TIMER_D),this.transport.send(n)}},{key:"cancel",value:function(e){if(this.state===b.STATUS_PROCEEDING){var t=new p.OutgoingRequest(_.CANCEL,this.request.ruri,this.ua,{route_set:this.request.getHeaders("route"),call_id:this.request.getHeader("call-id"),cseq:this.request.cseq});t.setHeader("from",this.request.getHeader("from")),t.setHeader("via",this.request.getHeader("via")),t.setHeader("to",this.request.getHeader("to")),e&&t.setHeader("reason",e),this.transport.send(t)}}},{key:"receiveResponse",value:function(e){var t=this,n=e.status_code;if(n>=100&&n<=199)switch(this.state){case b.STATUS_CALLING:this.stateChanged(b.STATUS_PROCEEDING),this.eventHandlers.onReceiveResponse(e);break;case b.STATUS_PROCEEDING:this.eventHandlers.onReceiveResponse(e)}else if(n>=200&&n<=299)switch(this.state){case b.STATUS_CALLING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_ACCEPTED),this.M=setTimeout(function(){t.timer_M()},m.TIMER_M),this.eventHandlers.onReceiveResponse(e);break;case b.STATUS_ACCEPTED:this.eventHandlers.onReceiveResponse(e)}else if(n>=300&&n<=699)switch(this.state){case b.STATUS_CALLING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_COMPLETED),this.sendACK(e),this.eventHandlers.onReceiveResponse(e);break;case b.STATUS_COMPLETED:this.sendACK(e)}}},{key:"C",get:function(){return b}}]),n}(),A=function(e){l(n,d);var t=a(n);function n(e,r,i,o){var l;s(this,n),(l=t.call(this)).id="z9hG4bK".concat(Math.floor(1e7*Math.random())),l.transport=r,l.request=i,l.eventHandlers=o;var u="SIP/2.0/".concat(r.via_transport);return u+=" ".concat(e.configuration.via_host,";branch=").concat(l.id),l.request.setHeader("via",u),l}return o(n,[{key:"send",value:function(){this.transport.send(this.request)||this.onTransportError()}},{key:"onTransportError",value:function(){y.debug("transport error occurred for transaction ".concat(this.id)),this.eventHandlers.onTransportError()}},{key:"C",get:function(){return b}}]),n}(),R=function(e){l(n,d);var t=a(n);function n(e,r,i){var o;return s(this,n),(o=t.call(this)).type=b.NON_INVITE_SERVER,o.id=i.via_branch,o.ua=e,o.transport=r,o.request=i,o.last_response="",i.server_transaction=c(o),o.state=b.STATUS_TRYING,e.newTransaction(c(o)),o}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"timer_J",value:function(){T.debug("Timer J expired for transaction ".concat(this.id)),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"onTransportError",value:function(){this.transportError||(this.transportError=!0,T.debug("transport error occurred, deleting transaction ".concat(this.id)),clearTimeout(this.J),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"receiveResponse",value:function(e,t,n,r){var s=this;if(100===e)switch(this.state){case b.STATUS_TRYING:this.stateChanged(b.STATUS_PROCEEDING),this.transport.send(t)||this.onTransportError();break;case b.STATUS_PROCEEDING:this.last_response=t,this.transport.send(t)?n&&n():(this.onTransportError(),r&&r())}else if(e>=200&&e<=699)switch(this.state){case b.STATUS_TRYING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_COMPLETED),this.last_response=t,this.J=setTimeout(function(){s.timer_J()},m.TIMER_J),this.transport.send(t)?n&&n():(this.onTransportError(),r&&r());break;case b.STATUS_COMPLETED:}}},{key:"C",get:function(){return b}}]),n}(),w=function(e){l(n,d);var t=a(n);function n(e,r,i){var o;return s(this,n),(o=t.call(this)).type=b.INVITE_SERVER,o.id=i.via_branch,o.ua=e,o.transport=r,o.request=i,o.last_response="",i.server_transaction=c(o),o.state=b.STATUS_PROCEEDING,e.newTransaction(c(o)),o.resendProvisionalTimer=null,i.reply(100),o}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"timer_H",value:function(){C.debug("Timer H expired for transaction ".concat(this.id)),this.state===b.STATUS_COMPLETED&&C.debug("ACK not received, dialog will be terminated"),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"timer_I",value:function(){this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"timer_L",value:function(){C.debug("Timer L expired for transaction ".concat(this.id)),this.state===b.STATUS_ACCEPTED&&(this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"onTransportError",value:function(){this.transportError||(this.transportError=!0,C.debug("transport error occurred, deleting transaction ".concat(this.id)),null!==this.resendProvisionalTimer&&(clearInterval(this.resendProvisionalTimer),this.resendProvisionalTimer=null),clearTimeout(this.L),clearTimeout(this.H),clearTimeout(this.I),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"resend_provisional",value:function(){this.transport.send(this.last_response)||this.onTransportError()}},{key:"receiveResponse",value:function(e,t,n,r){var s=this;if(e>=100&&e<=199)switch(this.state){case b.STATUS_PROCEEDING:this.transport.send(t)||this.onTransportError(),this.last_response=t}if(e>100&&e<=199&&this.state===b.STATUS_PROCEEDING)null===this.resendProvisionalTimer&&(this.resendProvisionalTimer=setInterval(function(){s.resend_provisional()},m.PROVISIONAL_RESPONSE_INTERVAL));else if(e>=200&&e<=299)switch(this.state){case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_ACCEPTED),this.last_response=t,this.L=setTimeout(function(){s.timer_L()},m.TIMER_L),null!==this.resendProvisionalTimer&&(clearInterval(this.resendProvisionalTimer),this.resendProvisionalTimer=null);case b.STATUS_ACCEPTED:this.transport.send(t)?n&&n():(this.onTransportError(),r&&r())}else if(e>=300&&e<=699)switch(this.state){case b.STATUS_PROCEEDING:null!==this.resendProvisionalTimer&&(clearInterval(this.resendProvisionalTimer),this.resendProvisionalTimer=null),this.transport.send(t)?(this.stateChanged(b.STATUS_COMPLETED),this.H=setTimeout(function(){s.timer_H()},m.TIMER_H),n&&n()):(this.onTransportError(),r&&r())}}},{key:"C",get:function(){return b}}]),n}();t.exports={C:b,NonInviteClientTransaction:S,InviteClientTransaction:E,AckClientTransaction:A,NonInviteServerTransaction:R,InviteServerTransaction:w,checkTransaction:function(e,t){var n,r=e._transactions;switch(t.method){case _.INVITE:if(n=r.ist[t.via_branch]){switch(n.state){case b.STATUS_PROCEEDING:n.transport.send(n.last_response);break;case b.STATUS_ACCEPTED:}return!0}break;case _.ACK:if(!(n=r.ist[t.via_branch]))return!1;if(n.state===b.STATUS_ACCEPTED)return!1;if(n.state===b.STATUS_COMPLETED)return n.state=b.STATUS_CONFIRMED,n.I=setTimeout(function(){n.timer_I()},m.TIMER_I),!0;break;case _.CANCEL:return(n=r.ist[t.via_branch])?(t.reply_sl(200),n.state!==b.STATUS_PROCEEDING):(t.reply_sl(481),!0);default:if(n=r.nist[t.via_branch]){switch(n.state){case b.STATUS_TRYING:break;case b.STATUS_PROCEEDING:case b.STATUS_COMPLETED:n.transport.send(n.last_response)}return!0}}}}},{"./Constants":2,"./Logger":9,"./SIPMessage":21,"./Timers":23,events:31}],25:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("./Logger"),i=e("./Socket"),o=e("./Constants"),l=new s("Transport"),u={STATUS_CONNECTED:0,STATUS_CONNECTING:1,STATUS_DISCONNECTED:2,SOCKET_STATUS_READY:0,SOCKET_STATUS_ERROR:1,recovery_options:{min_interval:o.CONNECTION_RECOVERY_MIN_INTERVAL,max_interval:o.CONNECTION_RECOVERY_MAX_INTERVAL}};t.exports=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:u.recovery_options;!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),l.debug("new()"),this.status=u.STATUS_DISCONNECTED,this.socket=null,this.sockets=[],this.recovery_options=n,this.recover_attempts=0,this.recovery_timer=null,this.close_requested=!1;try{this.textDecoder=new TextDecoder("utf8")}catch(e){l.warn("cannot use TextDecoder: ".concat(e))}if(void 0===t)throw new TypeError("Invalid argument. undefined 'sockets' argument");t instanceof Array||(t=[t]),t.forEach(function(e){if(!i.isSocket(e.socket))throw new TypeError("Invalid argument. invalid 'JsSIP.Socket' instance");if(e.weight&&!Number(e.weight))throw new TypeError("Invalid argument. 'weight' attribute is not a number");this.sockets.push({socket:e.socket,weight:e.weight||0,status:u.SOCKET_STATUS_READY})},this),this._getSocket()}var t,n,s;return t=e,(n=[{key:"connect",value:function(){l.debug("connect()"),this.isConnected()?l.debug("Transport is already connected"):this.isConnecting()?l.debug("Transport is connecting"):(this.close_requested=!1,this.status=u.STATUS_CONNECTING,this.onconnecting({socket:this.socket,attempts:this.recover_attempts}),this.close_requested||(this.socket.onconnect=this._onConnect.bind(this),this.socket.ondisconnect=this._onDisconnect.bind(this),this.socket.ondata=this._onData.bind(this),this.socket.connect()))}},{key:"disconnect",value:function(){l.debug("close()"),this.close_requested=!0,this.recover_attempts=0,this.status=u.STATUS_DISCONNECTED,null!==this.recovery_timer&&(clearTimeout(this.recovery_timer),this.recovery_timer=null),this.socket.onconnect=function(){},this.socket.ondisconnect=function(){},this.socket.ondata=function(){},this.socket.disconnect(),this.ondisconnect({socket:this.socket,error:!1})}},{key:"send",value:function(e){if(l.debug("send()"),!this.isConnected())return l.warn("unable to send message, transport is not connected"),!1;var t=e.toString();return l.debug("sending message:\n\n".concat(t,"\n")),this.socket.send(t)}},{key:"isConnected",value:function(){return this.status===u.STATUS_CONNECTED}},{key:"isConnecting",value:function(){return this.status===u.STATUS_CONNECTING}},{key:"_reconnect",value:function(){var e=this;this.recover_attempts+=1;var t=Math.floor(Math.random()*Math.pow(2,this.recover_attempts)+1);t<this.recovery_options.min_interval?t=this.recovery_options.min_interval:t>this.recovery_options.max_interval&&(t=this.recovery_options.max_interval),l.debug("reconnection attempt: ".concat(this.recover_attempts,". next connection attempt in ").concat(t," seconds")),this.recovery_timer=setTimeout(function(){e.close_requested||e.isConnected()||e.isConnecting()||(e._getSocket(),e.connect())},1e3*t)}},{key:"_getSocket",value:function(){var e=[];if(this.sockets.forEach(function(t){t.status!==u.SOCKET_STATUS_ERROR&&(0===e.length?e.push(t):t.weight>e[0].weight?e=[t]:t.weight===e[0].weight&&e.push(t))}),0===e.length)return this.sockets.forEach(function(e){e.status=u.SOCKET_STATUS_READY}),void this._getSocket();var t=Math.floor(Math.random()*e.length);this.socket=e[t].socket}},{key:"_onConnect",value:function(){this.recover_attempts=0,this.status=u.STATUS_CONNECTED,null!==this.recovery_timer&&(clearTimeout(this.recovery_timer),this.recovery_timer=null),this.onconnect({socket:this})}},{key:"_onDisconnect",value:function(e,t,n){this.status=u.STATUS_DISCONNECTED,this.ondisconnect({socket:this.socket,error:e,code:t,reason:n}),this.close_requested||(this.sockets.forEach(function(e){this.socket===e.socket&&(e.status=u.SOCKET_STATUS_ERROR)},this),this._reconnect(e))}},{key:"_onData",value:function(e){if("\r\n"!==e){if("string"!=typeof e){try{e=this.textDecoder?this.textDecoder.decode(e):String.fromCharCode.apply(null,new Uint8Array(e))}catch(e){return void l.debug("received binary message failed to be converted into string, message discarded")}l.debug("received binary message:\n\n".concat(e,"\n"))}else l.debug("received text message:\n\n".concat(e,"\n"));this.ondata({transport:this,message:e})}else l.debug("received message with CRLF Keep Alive response")}},{key:"via_transport",get:function(){return this.socket.via_transport}},{key:"url",get:function(){return this.socket.url}},{key:"sip_uri",get:function(){return this.socket.sip_uri}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"./Constants":2,"./Logger":9,"./Socket":22}],26:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t,n){return t&&s(e.prototype,t),n&&s(e,n),e}function o(e,t){return(o=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function l(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=a(e);if(t){var i=a(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return u(e)}(this,n)}}function u(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}function a(e){return(a=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var c=e("events").EventEmitter,h=e("./Logger"),d=e("./Constants"),f=e("./Registrator"),_=e("./RTCSession"),p=e("./Message"),m=e("./Options"),v=e("./Transactions"),g=e("./Transport"),y=e("./Utils"),T=e("./Exceptions"),C=e("./URI"),b=e("./Parser"),S=e("./SIPMessage"),E=e("./sanityCheck"),A=e("./Config"),R=new h("UA"),w={STATUS_INIT:0,STATUS_READY:1,STATUS_USER_CLOSED:2,STATUS_NOT_READY:3,CONFIGURATION_ERROR:1,NETWORK_ERROR:2};t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&o(e,t)}(n,c);var t=l(n);function n(e){var r;if(function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,n),R.debug("new() [configuration:%o]",e),(r=t.call(this))._cache={credentials:{}},r._configuration=Object.assign({},A.settings),r._dynConfiguration={},r._dialogs={},r._applicants={},r._sessions={},r._transport=null,r._contact=null,r._status=w.STATUS_INIT,r._error=null,r._transactions={nist:{},nict:{},ist:{},ict:{}},r._data={},r._closeTimer=null,void 0===e)throw new TypeError("Not enough arguments");try{r._loadConfig(e)}catch(e){throw r._status=w.STATUS_NOT_READY,r._error=w.CONFIGURATION_ERROR,e}return r._registrator=new f(u(r)),r}return i(n,null,[{key:"C",get:function(){return w}}]),i(n,[{key:"start",value:function(){R.debug("start()"),this._status===w.STATUS_INIT?this._transport.connect():this._status===w.STATUS_USER_CLOSED?(R.debug("restarting UA"),null!==this._closeTimer&&(clearTimeout(this._closeTimer),this._closeTimer=null,this._transport.disconnect()),this._status=w.STATUS_INIT,this._transport.connect()):this._status===w.STATUS_READY?R.debug("UA is in READY status, not restarted"):R.debug("ERROR: connection is down, Auto-Recovery system is trying to reconnect"),this._dynConfiguration.register=this._configuration.register}},{key:"register",value:function(){R.debug("register()"),this._dynConfiguration.register=!0,this._registrator.register()}},{key:"unregister",value:function(e){R.debug("unregister()"),this._dynConfiguration.register=!1,this._registrator.unregister(e)}},{key:"registrator",value:function(){return this._registrator}},{key:"isRegistered",value:function(){return this._registrator.registered}},{key:"isConnected",value:function(){return this._transport.isConnected()}},{key:"call",value:function(e,t){R.debug("call()");var n=new _(this);return n.connect(e,t),n}},{key:"sendMessage",value:function(e,t,n){R.debug("sendMessage()");var r=new p(this);return r.send(e,t,n),r}},{key:"sendOptions",value:function(e,t,n){R.debug("sendOptions()");var r=new m(this);return r.send(e,t,n),r}},{key:"terminateSessions",value:function(e){for(var t in R.debug("terminateSessions()"),this._sessions)this._sessions[t].isEnded()||this._sessions[t].terminate(e)}},{key:"stop",value:function(){var e=this;if(R.debug("stop()"),this._dynConfiguration={},this._status!==w.STATUS_USER_CLOSED){this._registrator.close();var t=Object.keys(this._sessions).length;for(var n in this._sessions)if(Object.prototype.hasOwnProperty.call(this._sessions,n)){R.debug("closing session ".concat(n));try{this._sessions[n].terminate()}catch(e){}}for(var r in this._applicants)if(Object.prototype.hasOwnProperty.call(this._applicants,r))try{this._applicants[r].close()}catch(e){}this._status=w.STATUS_USER_CLOSED,0===Object.keys(this._transactions.nict).length+Object.keys(this._transactions.nist).length+Object.keys(this._transactions.ict).length+Object.keys(this._transactions.ist).length&&0===t?this._transport.disconnect():this._closeTimer=setTimeout(function(){e._closeTimer=null,e._transport.disconnect()},2e3)}else R.debug("UA already closed")}},{key:"normalizeTarget",value:function(e){return y.normalizeTarget(e,this._configuration.hostport_params)}},{key:"get",value:function(e){switch(e){case"authorization_user":return this._configuration.authorization_user;case"realm":return this._configuration.realm;case"ha1":return this._configuration.ha1;case"authorization_jwt":return this._configuration.authorization_jwt;default:return void R.warn('get() | cannot get "%s" parameter in runtime',e)}}},{key:"set",value:function(e,t){switch(e){case"authorization_user":this._configuration.authorization_user=String(t);break;case"password":this._configuration.password=String(t);break;case"realm":this._configuration.realm=String(t);break;case"ha1":this._configuration.ha1=String(t),this._configuration.password=null;break;case"authorization_jwt":this._configuration.authorization_jwt=String(t);break;case"display_name":this._configuration.display_name=t;break;default:return R.warn('set() | cannot set "%s" parameter in runtime',e),!1}return!0}},{key:"newTransaction",value:function(e){this._transactions[e.type][e.id]=e,this.emit("newTransaction",{transaction:e})}},{key:"destroyTransaction",value:function(e){delete this._transactions[e.type][e.id],this.emit("transactionDestroyed",{transaction:e})}},{key:"newDialog",value:function(e){this._dialogs[e.id]=e}},{key:"destroyDialog",value:function(e){delete this._dialogs[e.id]}},{key:"newMessage",value:function(e,t){this._applicants[e]=e,this.emit("newMessage",t)}},{key:"newOptions",value:function(e,t){this._applicants[e]=e,this.emit("newOptions",t)}},{key:"destroyMessage",value:function(e){delete this._applicants[e]}},{key:"newRTCSession",value:function(e,t){this._sessions[e.id]=e,this.emit("newRTCSession",t)}},{key:"destroyRTCSession",value:function(e){delete this._sessions[e.id]}},{key:"registered",value:function(e){this.emit("registered",e)}},{key:"unregistered",value:function(e){this.emit("unregistered",e)}},{key:"registrationFailed",value:function(e){this.emit("registrationFailed",e)}},{key:"receiveRequest",value:function(e){var t=e.method;if(e.ruri.user!==this._configuration.uri.user&&e.ruri.user!==this._contact.uri.user)return R.debug("Request-URI does not point to us"),void(e.method!==d.ACK&&e.reply_sl(404));if(e.ruri.scheme!==d.SIPS){if(!v.checkTransaction(this,e)){if(t===d.INVITE?new v.InviteServerTransaction(this,this._transport,e):t!==d.ACK&&t!==d.CANCEL&&new v.NonInviteServerTransaction(this,this._transport,e),t===d.OPTIONS){if(0===this.listeners("newOptions").length)return void e.reply(200);new m(this).init_incoming(e)}else if(t===d.MESSAGE){if(0===this.listeners("newMessage").length)return void e.reply(405);new p(this).init_incoming(e)}else if(t===d.INVITE&&!e.to_tag&&0===this.listeners("newRTCSession").length)return void e.reply(405);var n,r;if(e.to_tag)(n=this._findDialog(e.call_id,e.from_tag,e.to_tag))?n.receiveRequest(e):t===d.NOTIFY?(r=this._findSession(e))?r.receiveRequest(e):(R.debug("received NOTIFY request for a non existent subscription"),e.reply(481,"Subscription does not exist")):t!==d.ACK&&e.reply(481);else switch(t){case d.INVITE:if(window.RTCPeerConnection)if(e.hasHeader("replaces")){var s=e.replaces;(n=this._findDialog(s.call_id,s.from_tag,s.to_tag))?(r=n.owner).isEnded()?e.reply(603):r.receiveRequest(e):e.reply(481)}else(r=new _(this)).init_incoming(e);else R.warn("INVITE received but WebRTC is not supported"),e.reply(488);break;case d.BYE:e.reply(481);break;case d.CANCEL:(r=this._findSession(e))?r.receiveRequest(e):R.debug("received CANCEL request for a non existent session");break;case d.ACK:break;case d.NOTIFY:this.emit("sipEvent",{event:e.event,request:e}),e.reply(200);break;default:e.reply(405)}}}else e.reply_sl(416)}},{key:"_findSession",value:function(e){var t=e.call_id,n=e.from_tag,r=e.to_tag,s=t+n,i=this._sessions[s],o=t+r,l=this._sessions[o];return i||(l||null)}},{key:"_findDialog",value:function(e,t,n){var r=e+t+n,s=this._dialogs[r];return s||(r=e+n+t,(s=this._dialogs[r])||null)}},{key:"_loadConfig",value:function(e){try{A.load(this._configuration,e)}catch(e){throw e}0===this._configuration.display_name&&(this._configuration.display_name="0"),this._configuration.instance_id||(this._configuration.instance_id=y.newUUID()),this._configuration.jssip_id=y.createRandomToken(5);var t=this._configuration.uri.clone();t.user=null,this._configuration.hostport_params=t.toString().replace(/^sip:/i,"");try{this._transport=new g(this._configuration.sockets,{max_interval:this._configuration.connection_recovery_max_interval,min_interval:this._configuration.connection_recovery_min_interval}),this._transport.onconnecting=function(e){this.emit("connecting",e)}.bind(this),this._transport.onconnect=function(e){if(this._status===w.STATUS_USER_CLOSED)return;this._status=w.STATUS_READY,this._error=null,this.emit("connected",e),this._dynConfiguration.register&&this._registrator.register()}.bind(this),this._transport.ondisconnect=function(e){for(var t=0,n=["nict","ict","nist","ist"];t<n.length;t++){var r=n[t];for(var s in this._transactions[r])Object.prototype.hasOwnProperty.call(this._transactions[r],s)&&this._transactions[r][s].onTransportError()}this.emit("disconnected",e),this._registrator.onTransportClosed(),this._status!==w.STATUS_USER_CLOSED&&(this._status=w.STATUS_NOT_READY,this._error=w.NETWORK_ERROR)}.bind(this),this._transport.ondata=function(e){var t=e.transport,n=e.message;if(!(n=b.parseMessage(n,this)))return;if(this._status===w.STATUS_USER_CLOSED&&n instanceof S.IncomingRequest)return;if(!E(n,this,t))return;if(n instanceof S.IncomingRequest)n.transport=t,this.receiveRequest(n);else if(n instanceof S.IncomingResponse){var r;switch(n.method){case d.INVITE:(r=this._transactions.ict[n.via_branch])&&r.receiveResponse(n);break;case d.ACK:break;default:(r=this._transactions.nict[n.via_branch])&&r.receiveResponse(n)}}}.bind(this)}catch(e){throw R.warn(e),new T.ConfigurationError("sockets",this._configuration.sockets)}if(delete this._configuration.sockets,this._configuration.authorization_user||(this._configuration.authorization_user=this._configuration.uri.user),!this._configuration.registrar_server){var n=this._configuration.uri.clone();n.user=null,n.clearParams(),n.clearHeaders(),this._configuration.registrar_server=n}this._configuration.no_answer_timeout*=1e3,this._configuration.contact_uri?this._configuration.via_host=this._configuration.contact_uri.host:this._configuration.contact_uri=new C("sip",y.createRandomToken(8),this._configuration.via_host,null,{transport:"ws"}),this._contact={pub_gruu:null,temp_gruu:null,uri:this._configuration.contact_uri,toString:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=e.anonymous||null,n=e.outbound||null,r="<";return r+=t?this.temp_gruu||"sip:anonymous@anonymous.invalid;transport=ws":this.pub_gruu||this.uri.toString(),!n||(t?this.temp_gruu:this.pub_gruu)||(r+=";ob"),r+=">"}};var r=["authorization_user","password","realm","ha1","authorization_jwt","display_name","register"];for(var s in this._configuration)Object.prototype.hasOwnProperty.call(this._configuration,s)&&(-1!==r.indexOf(s)?Object.defineProperty(this._configuration,s,{writable:!0,configurable:!1}):Object.defineProperty(this._configuration,s,{writable:!1,configurable:!1}));for(var i in R.debug("configuration parameters after validation:"),this._configuration)if(Object.prototype.hasOwnProperty.call(A.settings,i))switch(i){case"uri":case"registrar_server":R.debug("- ".concat(i,": ").concat(this._configuration[i]));break;case"password":case"ha1":case"authorization_jwt":R.debug("- ".concat(i,": NOT SHOWN"));break;default:R.debug("- ".concat(i,": ").concat(JSON.stringify(this._configuration[i])))}}},{key:"C",get:function(){return w}},{key:"status",get:function(){return this._status}},{key:"contact",get:function(){return this._contact}},{key:"configuration",get:function(){return this._configuration}},{key:"transport",get:function(){return this._transport}}]),n}()},{"./Config":1,"./Constants":2,"./Exceptions":6,"./Logger":9,"./Message":10,"./Options":12,"./Parser":13,"./RTCSession":14,"./Registrator":19,"./SIPMessage":21,"./Transactions":24,"./Transport":25,"./URI":27,"./Utils":28,"./sanityCheck":30,events:31}],27:[function(e,t,n){"use strict";function r(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return s(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return s(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,i=function(){};return{s:i,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function s(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}function i(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function o(e,t,n){return t&&i(e.prototype,t),n&&i(e,n),e}var l=e("./Constants"),u=e("./Utils"),a=e("./Grammar");t.exports=function(){function e(t,n,r,s){var i=arguments.length>4&&void 0!==arguments[4]?arguments[4]:{},o=arguments.length>5&&void 0!==arguments[5]?arguments[5]:{};if(function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),!r)throw new TypeError('missing or invalid "host" parameter');for(var u in this._parameters={},this._headers={},this._scheme=t||l.SIP,this._user=n,this._host=r,this._port=s,i)Object.prototype.hasOwnProperty.call(i,u)&&this.setParam(u,i[u]);for(var a in o)Object.prototype.hasOwnProperty.call(o,a)&&this.setHeader(a,o[a])}return o(e,null,[{key:"parse",value:function(e){return-1!==(e=a.parse(e,"SIP_URI"))?e:void 0}}]),o(e,[{key:"setParam",value:function(e,t){e&&(this._parameters[e.toLowerCase()]=null==t?null:t.toString())}},{key:"getParam",value:function(e){if(e)return this._parameters[e.toLowerCase()]}},{key:"hasParam",value:function(e){if(e)return!!this._parameters.hasOwnProperty(e.toLowerCase())}},{key:"deleteParam",value:function(e){if(e=e.toLowerCase(),this._parameters.hasOwnProperty(e)){var t=this._parameters[e];return delete this._parameters[e],t}}},{key:"clearParams",value:function(){this._parameters={}}},{key:"setHeader",value:function(e,t){this._headers[u.headerize(e)]=Array.isArray(t)?t:[t]}},{key:"getHeader",value:function(e){if(e)return this._headers[u.headerize(e)]}},{key:"hasHeader",value:function(e){if(e)return!!this._headers.hasOwnProperty(u.headerize(e))}},{key:"deleteHeader",value:function(e){if(e=u.headerize(e),this._headers.hasOwnProperty(e)){var t=this._headers[e];return delete this._headers[e],t}}},{key:"clearHeaders",value:function(){this._headers={}}},{key:"clone",value:function(){return new e(this._scheme,this._user,this._host,this._port,JSON.parse(JSON.stringify(this._parameters)),JSON.parse(JSON.stringify(this._headers)))}},{key:"toString",value:function(){var e=[],t="".concat(this._scheme,":");for(var n in this._user&&(t+="".concat(u.escapeUser(this._user),"@")),t+=this._host,(this._port||0===this._port)&&(t+=":".concat(this._port)),this._parameters)Object.prototype.hasOwnProperty.call(this._parameters,n)&&(t+=";".concat(n),null!==this._parameters[n]&&(t+="=".concat(this._parameters[n])));for(var s in this._headers)if(Object.prototype.hasOwnProperty.call(this._headers,s)){var i,o=r(this._headers[s]);try{for(o.s();!(i=o.n()).done;){var l=i.value;e.push("".concat(s,"=").concat(l))}}catch(e){o.e(e)}finally{o.f()}}return e.length>0&&(t+="?".concat(e.join("&"))),t}},{key:"toAor",value:function(e){var t="".concat(this._scheme,":");return this._user&&(t+="".concat(u.escapeUser(this._user),"@")),t+=this._host,e&&(this._port||0===this._port)&&(t+=":".concat(this._port)),t}},{key:"scheme",get:function(){return this._scheme},set:function(e){this._scheme=e.toLowerCase()}},{key:"user",get:function(){return this._user},set:function(e){this._user=e}},{key:"host",get:function(){return this._host},set:function(e){this._host=e.toLowerCase()}},{key:"port",get:function(){return this._port},set:function(e){this._port=0===e?e:parseInt(e,10)||null}}]),e}()},{"./Constants":2,"./Grammar":7,"./Utils":28}],28:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return i(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return i(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,s=function(){};return{s:s,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:s}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function i(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}var o=e("./Constants"),l=e("./URI"),u=e("./Grammar");n.str_utf8_length=function(e){return unescape(encodeURIComponent(e)).length};var a=n.isFunction=function(e){return void 0!==e&&"[object Function]"===Object.prototype.toString.call(e)};n.isString=function(e){return void 0!==e&&"[object String]"===Object.prototype.toString.call(e)},n.isDecimal=function(e){return!isNaN(e)&&parseFloat(e)===parseInt(e,10)},n.isEmpty=function(e){return null===e||""===e||void 0===e||Array.isArray(e)&&0===e.length||"number"==typeof e&&isNaN(e)},n.hasMethods=function(e){for(var t=arguments.length,n=new Array(t>1?t-1:0),r=1;r<t;r++)n[r-1]=arguments[r];for(var s=0,i=n;s<i.length;s++){var o=i[s];if(a(e[o]))return!1}return!0};var c=n.createRandomToken=function(e){var t,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:32,r="";for(t=0;t<e;t++)r+=(Math.random()*n|0).toString(n);return r};n.newTag=function(){return c(10)},n.newUUID=function(){return"xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g,function(e){var t=16*Math.random()|0;return("x"===e?t:3&t|8).toString(16)})},n.hostType=function(e){if(e)return-1!==(e=u.parse(e,"host"))?e.host_type:void 0};var h=n.escapeUser=function(e){return encodeURIComponent(decodeURIComponent(e)).replace(/%3A/gi,":").replace(/%2B/gi,"+").replace(/%3F/gi,"?").replace(/%2F/gi,"/")};n.normalizeTarget=function(e,t){if(e){if(e instanceof l)return e;if("string"==typeof e){var n,r,s,i=e.split("@");switch(i.length){case 1:if(!t)return;n=e,r=t;break;case 2:n=i[0],r=i[1];break;default:n=i.slice(0,i.length-1).join("@"),r=i[i.length-1]}return n=n.replace(/^(sips?|tel):/i,""),/^[-.()]*\+?[0-9\-.()]+$/.test(n)&&(n=n.replace(/[-.()]/g,"")),e="".concat(o.SIP,":").concat(h(n),"@").concat(r),(s=l.parse(e))?s:void 0}}else;},n.headerize=function(e){var 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Function?t.format(t.push?n:n[t.name]):t.format)];if(t.names)for(var i=0;i<t.names.length;i+=1){var o=t.names[i];t.name?r.push(n[t.name][o]):r.push(n[t.names[i]])}else r.push(n[t.name]);return function(e){var t=1,n=arguments,r=n.length;return e.replace(s,function(e){if(t>=r)return e;var s=n[t];switch(t+=1,e){case"%%":return"%";case"%s":return String(s);case"%d":return Number(s);case"%v":return""}})}.apply(null,r)},o=["v","o","s","i","u","e","p","c","b","t","r","z","a"],l=["i","c","b","a"];t.exports=function(e,t){t=t||{},null==e.version&&(e.version=0),null==e.name&&(e.name=" "),e.media.forEach(function(e){null==e.payloads&&(e.payloads="")});var n=t.outerOrder||o,s=t.innerOrder||l,u=[];return n.forEach(function(t){r[t].forEach(function(n){n.name in e&&null!=e[n.name]?u.push(i(t,n,e)):n.push in e&&null!=e[n.push]&&e[n.push].forEach(function(e){u.push(i(t,n,e))})})}),e.media.forEach(function(e){u.push(i("m",r.m[0],e)),s.forEach(function(t){r[t].forEach(function(n){n.name in e&&null!=e[n.name]?u.push(i(t,n,e)):n.push in e&&null!=e[n.push]&&e[n.push].forEach(function(e){u.push(i(t,n,e))})})})}),u.join("\r\n")+"\r\n"}},{"./grammar":36}],40:[function(e,t,n){t.exports={name:"jssip",title:"JsSIP",description:"the Javascript SIP library",version:"3.10.0",homepage:"https://jssip.net",contributors:["José Luis Millán <jmillan@aliax.net> (https://github.com/jmillan)","Iñaki Baz Castillo <ibc@aliax.net> (https://inakibaz.me)"],types:"lib/JsSIP.d.ts",main:"lib-es5/JsSIP.js",keywords:["sip","websocket","webrtc","node","browser","library"],license:"MIT",repository:{type:"git",url:"https://github.com/versatica/JsSIP.git"},bugs:{url:"https://github.com/versatica/JsSIP/issues"},dependencies:{"@types/events":"^3.0.0","@types/debug":"^4.1.7",debug:"^4.3.1",events:"^3.3.0","sdp-transform":"^2.14.1"},devDependencies:{"@babel/core":"^7.19.6","@babel/preset-env":"^7.19.4","ansi-colors":"^3.2.4",browserify:"^16.5.1",eslint:"^5.16.0","fancy-log":"^1.3.3",gulp:"^4.0.2","gulp-babel":"^8.0.0","gulp-eslint":"^5.0.0","gulp-expect-file":"^1.0.2","gulp-header":"^2.0.9","gulp-nodeunit-runner":"^0.2.2","gulp-plumber":"^1.2.1","gulp-rename":"^1.4.0","gulp-uglify-es":"^1.0.4",pegjs:"^0.7.0","vinyl-buffer":"^1.0.1","vinyl-source-stream":"^2.0.0"},scripts:{lint:"node npm-scripts.js lint",test:"node npm-scripts.js test",prepublish:"node npm-scripts.js prepublish",release:"node npm-scripts.js 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+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).JsSIP=e()}}(function(){return function(){return function e(t,n,r){function s(o,l){if(!n[o]){if(!t[o]){var u="function"==typeof require&&require;if(!l&&u)return u(o,!0);if(i)return i(o,!0);var a=new Error("Cannot find module '"+o+"'");throw a.code="MODULE_NOT_FOUND",a}var c=n[o]={exports:{}};t[o][0].call(c.exports,function(e){return s(t[o][1][e]||e)},c,c.exports,e,t,n,r)}return n[o].exports}for(var i="function"==typeof require&&require,o=0;o<r.length;o++)s(r[o]);return s}}()({1:[function(e,t,n){"use strict";function r(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return s(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return s(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,i=function(){};return{s:i,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function s(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}var i=e("./Utils"),o=e("./Constants"),l=e("./Grammar"),u=e("./URI"),a=e("./Socket"),c=e("./Exceptions");n.settings={authorization_user:null,password:null,realm:null,ha1:null,authorization_jwt:null,display_name:null,uri:null,contact_uri:null,instance_id:null,use_preloaded_route:!1,session_timers:!0,session_timers_refresh_method:o.UPDATE,session_timers_force_refresher:!1,no_answer_timeout:60,register:!0,register_expires:600,registrar_server:null,sockets:null,connection_recovery_max_interval:o.CONNECTION_RECOVERY_MAX_INTERVAL,connection_recovery_min_interval:o.CONNECTION_RECOVERY_MIN_INTERVAL,extra_headers:null,via_host:"".concat(i.createRandomToken(12),".invalid")};var h={mandatory:{sockets:function(e){var t=[];if(a.isSocket(e))t.push({socket:e});else{if(!Array.isArray(e)||!e.length)return;var n,s=r(e);try{for(s.s();!(n=s.n()).done;){var i=n.value;Object.prototype.hasOwnProperty.call(i,"socket")&&a.isSocket(i.socket)?t.push(i):a.isSocket(i)&&t.push({socket:i})}}catch(e){s.e(e)}finally{s.f()}}return t},uri:function(e){/^sip:/i.test(e)||(e="".concat(o.SIP,":").concat(e));var t=u.parse(e);return t&&t.user?t:void 0}},optional:{authorization_user:function(e){return-1===l.parse('"'.concat(e,'"'),"quoted_string")?void 0:e},authorization_jwt:function(e){if("string"==typeof e)return e},user_agent:function(e){if("string"==typeof e)return e},connection_recovery_max_interval:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},connection_recovery_min_interval:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},contact_uri:function(e){if("string"==typeof e){var t=l.parse(e,"SIP_URI");if(-1!==t)return t}},display_name:function(e){return e},instance_id:function(e){return/^uuid:/i.test(e)&&(e=e.substr(5)),-1===l.parse(e,"uuid")?void 0:e},no_answer_timeout:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},session_timers:function(e){if("boolean"==typeof e)return e},session_timers_refresh_method:function(e){if("string"==typeof e&&((e=e.toUpperCase())===o.INVITE||e===o.UPDATE))return e},session_timers_force_refresher:function(e){if("boolean"==typeof e)return e},password:function(e){return String(e)},realm:function(e){return String(e)},ha1:function(e){return String(e)},register:function(e){if("boolean"==typeof e)return e},register_expires:function(e){if(i.isDecimal(e)){var t=Number(e);if(t>0)return t}},registrar_server:function(e){/^sip:/i.test(e)||(e="".concat(o.SIP,":").concat(e));var t=u.parse(e);return t?t.user?void 0:t:void 0},use_preloaded_route:function(e){if("boolean"==typeof e)return e},extra_headers:function(e){var t=[];if(Array.isArray(e)&&e.length){var n,s=r(e);try{for(s.s();!(n=s.n()).done;){var i=n.value;"string"==typeof i&&t.push(i)}}catch(e){s.e(e)}finally{s.f()}return t}}}};n.load=function(e,t){for(var n in h.mandatory){if(!t.hasOwnProperty(n))throw new c.ConfigurationError(n);var r=t[n],s=h.mandatory[n](r);if(void 0===s)throw new c.ConfigurationError(n,r);e[n]=s}for(var o in h.optional)if(t.hasOwnProperty(o)){var l=t[o];if(i.isEmpty(l))continue;var u=h.optional[o](l);if(void 0===u)throw new c.ConfigurationError(o,l);e[o]=u}}},{"./Constants":2,"./Exceptions":6,"./Grammar":7,"./Socket":22,"./URI":27,"./Utils":28}],2:[function(e,t,n){"use strict";var r=e("../package.json");t.exports={USER_AGENT:"".concat(r.title," ").concat(r.version),SIP:"sip",SIPS:"sips",causes:{CONNECTION_ERROR:"Connection Error",REQUEST_TIMEOUT:"Request Timeout",SIP_FAILURE_CODE:"SIP Failure Code",INTERNAL_ERROR:"Internal Error",BUSY:"Busy",REJECTED:"Rejected",REDIRECTED:"Redirected",UNAVAILABLE:"Unavailable",NOT_FOUND:"Not Found",ADDRESS_INCOMPLETE:"Address Incomplete",INCOMPATIBLE_SDP:"Incompatible SDP",MISSING_SDP:"Missing SDP",AUTHENTICATION_ERROR:"Authentication Error",BYE:"Terminated",WEBRTC_ERROR:"WebRTC Error",CANCELED:"Canceled",NO_ANSWER:"No Answer",EXPIRES:"Expires",NO_ACK:"No ACK",DIALOG_ERROR:"Dialog Error",USER_DENIED_MEDIA_ACCESS:"User Denied Media Access",BAD_MEDIA_DESCRIPTION:"Bad Media Description",RTP_TIMEOUT:"RTP Timeout"},SIP_ERROR_CAUSES:{REDIRECTED:[300,301,302,305,380],BUSY:[486,600],REJECTED:[403,603],NOT_FOUND:[404,604],UNAVAILABLE:[480,410,408,430],ADDRESS_INCOMPLETE:[484,424],INCOMPATIBLE_SDP:[488,606],AUTHENTICATION_ERROR:[401,407]},ACK:"ACK",BYE:"BYE",CANCEL:"CANCEL",INFO:"INFO",INVITE:"INVITE",MESSAGE:"MESSAGE",NOTIFY:"NOTIFY",OPTIONS:"OPTIONS",REGISTER:"REGISTER",REFER:"REFER",UPDATE:"UPDATE",SUBSCRIBE:"SUBSCRIBE",DTMF_TRANSPORT:{INFO:"INFO",RFC2833:"RFC2833"},REASON_PHRASE:{100:"Trying",180:"Ringing",181:"Call Is Being Forwarded",182:"Queued",183:"Session Progress",199:"Early Dialog Terminated",200:"OK",202:"Accepted",204:"No Notification",300:"Multiple Choices",301:"Moved Permanently",302:"Moved Temporarily",305:"Use Proxy",380:"Alternative Service",400:"Bad Request",401:"Unauthorized",402:"Payment Required",403:"Forbidden",404:"Not Found",405:"Method Not Allowed",406:"Not Acceptable",407:"Proxy Authentication Required",408:"Request Timeout",410:"Gone",412:"Conditional Request Failed",413:"Request Entity Too Large",414:"Request-URI Too Long",415:"Unsupported Media Type",416:"Unsupported URI Scheme",417:"Unknown Resource-Priority",420:"Bad Extension",421:"Extension Required",422:"Session Interval Too Small",423:"Interval Too Brief",424:"Bad Location Information",428:"Use Identity Header",429:"Provide Referrer Identity",430:"Flow Failed",433:"Anonymity Disallowed",436:"Bad Identity-Info",437:"Unsupported Certificate",438:"Invalid Identity Header",439:"First Hop Lacks Outbound Support",440:"Max-Breadth Exceeded",469:"Bad Info Package",470:"Consent Needed",478:"Unresolvable Destination",480:"Temporarily Unavailable",481:"Call/Transaction Does Not Exist",482:"Loop Detected",483:"Too Many Hops",484:"Address Incomplete",485:"Ambiguous",486:"Busy Here",487:"Request Terminated",488:"Not Acceptable Here",489:"Bad Event",491:"Request Pending",493:"Undecipherable",494:"Security Agreement Required",500:"JsSIP Internal Error",501:"Not Implemented",502:"Bad Gateway",503:"Service Unavailable",504:"Server Time-out",505:"Version Not Supported",513:"Message Too Large",580:"Precondition Failure",600:"Busy Everywhere",603:"Decline",604:"Does Not Exist Anywhere",606:"Not Acceptable"},ALLOWED_METHODS:"INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY",ACCEPTED_BODY_TYPES:"application/sdp, application/dtmf-relay",MAX_FORWARDS:69,SESSION_EXPIRES:90,MIN_SESSION_EXPIRES:60,CONNECTION_RECOVERY_MAX_INTERVAL:30,CONNECTION_RECOVERY_MIN_INTERVAL:2}},{"../package.json":40}],3:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function s(e,t,n){return t&&r(e.prototype,t),n&&r(e,n),e}var i=e("./Logger"),o=e("./SIPMessage"),l=e("./Constants"),u=e("./Transactions"),a=e("./Dialog/RequestSender"),c=e("./Utils"),h=new i("Dialog"),d={STATUS_EARLY:1,STATUS_CONFIRMED:2,STATUS_TERMINATED:3};t.exports=function(){function e(t,n,r){var s=arguments.length>3&&void 0!==arguments[3]?arguments[3]:d.STATUS_CONFIRMED;if(function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._owner=t,this._ua=t._ua,this._uac_pending_reply=!1,this._uas_pending_reply=!1,!n.hasHeader("contact"))return{error:"unable to create a Dialog without Contact header field"};n instanceof o.IncomingResponse&&(s=n.status_code<200?d.STATUS_EARLY:d.STATUS_CONFIRMED);var i=n.parseHeader("contact");"UAS"===r?(this._id={call_id:n.call_id,local_tag:n.to_tag,remote_tag:n.from_tag,toString:function(){return this.call_id+this.local_tag+this.remote_tag}},this._state=s,this._remote_seqnum=n.cseq,this._local_uri=n.parseHeader("to").uri,this._remote_uri=n.parseHeader("from").uri,this._remote_target=i.uri,this._route_set=n.getHeaders("record-route"),this._ack_seqnum=this._remote_seqnum):"UAC"===r&&(this._id={call_id:n.call_id,local_tag:n.from_tag,remote_tag:n.to_tag,toString:function(){return this.call_id+this.local_tag+this.remote_tag}},this._state=s,this._local_seqnum=n.cseq,this._local_uri=n.parseHeader("from").uri,this._remote_uri=n.parseHeader("to").uri,this._remote_target=i.uri,this._route_set=n.getHeaders("record-route").reverse(),this._ack_seqnum=null),this._ua.newDialog(this),h.debug("new ".concat(r," dialog created with status ").concat(this._state===d.STATUS_EARLY?"EARLY":"CONFIRMED"))}return s(e,null,[{key:"C",get:function(){return d}}]),s(e,[{key:"isTerminated",value:function(){return this._status===d.STATUS_TERMINATED}},{key:"update",value:function(e,t){this._state=d.STATUS_CONFIRMED,h.debug("dialog ".concat(this._id.toString(),"  changed to CONFIRMED state")),"UAC"===t&&(this._route_set=e.getHeaders("record-route").reverse())}},{key:"terminate",value:function(){h.debug("dialog ".concat(this._id.toString()," deleted")),this._ua.destroyDialog(this),this._state=d.STATUS_TERMINATED}},{key:"sendRequest",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},r=c.cloneArray(n.extraHeaders),s=c.cloneObject(n.eventHandlers),i=n.body||null,o=this._createRequest(e,r,i);return s.onAuthenticated=function(){t._local_seqnum+=1},new a(this,o,s).send(),o}},{key:"receiveRequest",value:function(e){this._checkInDialogRequest(e)&&(e.method===l.ACK&&null!==this._ack_seqnum?this._ack_seqnum=null:e.method===l.INVITE&&(this._ack_seqnum=e.cseq),this._owner.receiveRequest(e))}},{key:"_createRequest",value:function(e,t,n){t=c.cloneArray(t),this._local_seqnum||(this._local_seqnum=Math.floor(1e4*Math.random()));var r=e===l.CANCEL||e===l.ACK?this._local_seqnum:this._local_seqnum+=1;return new o.OutgoingRequest(e,this._remote_target,this._ua,{cseq:r,call_id:this._id.call_id,from_uri:this._local_uri,from_tag:this._id.local_tag,to_uri:this._remote_uri,to_tag:this._id.remote_tag,route_set:this._route_set},t,n)}},{key:"_checkInDialogRequest",value:function(e){var t=this;if(this._remote_seqnum)if(e.cseq<this._remote_seqnum){if(e.method!==l.ACK)return e.reply(500),!1;if(null===this._ack_seqnum||e.cseq!==this._ack_seqnum)return!1}else e.cseq>this._remote_seqnum&&(this._remote_seqnum=e.cseq);else this._remote_seqnum=e.cseq;if(e.method===l.INVITE||e.method===l.UPDATE&&e.body){if(!0===this._uac_pending_reply)e.reply(491);else{if(!0===this._uas_pending_reply){var n=1+(10*Math.random()|0);return e.reply(500,null,["Retry-After:".concat(n)]),!1}this._uas_pending_reply=!0;e.server_transaction.on("stateChanged",function n(){e.server_transaction.state!==u.C.STATUS_ACCEPTED&&e.server_transaction.state!==u.C.STATUS_COMPLETED&&e.server_transaction.state!==u.C.STATUS_TERMINATED||(e.server_transaction.removeListener("stateChanged",n),t._uas_pending_reply=!1)})}e.hasHeader("contact")&&e.server_transaction.on("stateChanged",function(){e.server_transaction.state===u.C.STATUS_ACCEPTED&&(t._remote_target=e.parseHeader("contact").uri)})}else e.method===l.NOTIFY&&e.hasHeader("contact")&&e.server_transaction.on("stateChanged",function(){e.server_transaction.state===u.C.STATUS_COMPLETED&&(t._remote_target=e.parseHeader("contact").uri)});return!0}},{key:"id",get:function(){return this._id}},{key:"local_seqnum",get:function(){return this._local_seqnum},set:function(e){this._local_seqnum=e}},{key:"owner",get:function(){return this._owner}},{key:"uac_pending_reply",get:function(){return this._uac_pending_reply},set:function(e){this._uac_pending_reply=e}},{key:"uas_pending_reply",get:function(){return this._uas_pending_reply}}]),e}()},{"./Constants":2,"./Dialog/RequestSender":4,"./Logger":9,"./SIPMessage":21,"./Transactions":24,"./Utils":28}],4:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("../Constants"),i=e("../Transactions"),o=e("../RequestSender"),l={onRequestTimeout:function(){},onTransportError:function(){},onSuccessResponse:function(){},onErrorResponse:function(){},onAuthenticated:function(){},onDialogError:function(){}};t.exports=function(){function e(t,n,r){for(var s in function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._dialog=t,this._ua=t._ua,this._request=n,this._eventHandlers=r,this._reattempt=!1,this._reattemptTimer=null,l)Object.prototype.hasOwnProperty.call(l,s)&&(this._eventHandlers[s]||(this._eventHandlers[s]=l[s]))}var t,n,u;return t=e,(n=[{key:"send",value:function(){var e=this,t=new o(this._ua,this._request,{onRequestTimeout:function(){e._eventHandlers.onRequestTimeout()},onTransportError:function(){e._eventHandlers.onTransportError()},onAuthenticated:function(t){e._eventHandlers.onAuthenticated(t)},onReceiveResponse:function(t){e._receiveResponse(t)}});if(t.send(),(this._request.method===s.INVITE||this._request.method===s.UPDATE&&this._request.body)&&t.clientTransaction.state!==i.C.STATUS_TERMINATED){this._dialog.uac_pending_reply=!0;t.clientTransaction.on("stateChanged",function n(){t.clientTransaction.state!==i.C.STATUS_ACCEPTED&&t.clientTransaction.state!==i.C.STATUS_COMPLETED&&t.clientTransaction.state!==i.C.STATUS_TERMINATED||(t.clientTransaction.removeListener("stateChanged",n),e._dialog.uac_pending_reply=!1)})}}},{key:"_receiveResponse",value:function(e){var t=this;408===e.status_code||481===e.status_code?this._eventHandlers.onDialogError(e):e.method===s.INVITE&&491===e.status_code?this._reattempt?e.status_code>=200&&e.status_code<300?this._eventHandlers.onSuccessResponse(e):e.status_code>=300&&this._eventHandlers.onErrorResponse(e):(this._request.cseq=this._dialog.local_seqnum+=1,this._reattemptTimer=setTimeout(function(){t._dialog.isTerminated()||(t._reattempt=!0,t.send())},1e3)):e.status_code>=200&&e.status_code<300?this._eventHandlers.onSuccessResponse(e):e.status_code>=300&&this._eventHandlers.onErrorResponse(e)}},{key:"request",get:function(){return 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n=e.method,r=e.ruri,s=e.body,l=arguments.length>2&&void 0!==arguments[2]?arguments[2]:null;if(this._algorithm=t.algorithm,this._realm=t.realm,this._nonce=t.nonce,this._opaque=t.opaque,this._stale=t.stale,this._algorithm){if("MD5"!==this._algorithm)return o.warn('authenticate() | challenge with Digest algorithm different than "MD5", authentication aborted'),!1}else this._algorithm="MD5";if(!this._nonce)return o.warn("authenticate() | challenge without Digest nonce, authentication aborted"),!1;if(!this._realm)return o.warn("authenticate() | challenge without Digest realm, authentication aborted"),!1;if(!this._credentials.password){if(!this._credentials.ha1)return o.warn("authenticate() | no plain SIP password nor ha1 provided, authentication aborted"),!1;if(this._credentials.realm!==this._realm)return o.warn('authenticate() | no plain SIP password, and stored `realm` does not match the given `realm`, cannot authenticate [stored:"%s", given:"%s"]',this._credentials.realm,this._realm),!1}if(t.qop)if(t.qop.indexOf("auth-int")>-1)this._qop="auth-int";else{if(!(t.qop.indexOf("auth")>-1))return o.warn('authenticate() | challenge without Digest qop different than "auth" or "auth-int", authentication aborted'),!1;this._qop="auth"}else this._qop=null;this._method=n,this._uri=r,this._cnonce=l||i.createRandomToken(12),this._nc+=1;var u,a,c=Number(this._nc).toString(16);return this._ncHex="00000000".substr(0,8-c.length)+c,4294967296===this._nc&&(this._nc=1,this._ncHex="00000001"),this._credentials.password?this._ha1=i.calculateMD5("".concat(this._credentials.username,":").concat(this._realm,":").concat(this._credentials.password)):this._ha1=this._credentials.ha1,"auth"===this._qop?(u="".concat(this._method,":").concat(this._uri),a=i.calculateMD5(u),o.debug('authenticate() | using qop=auth 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s=i,l=i,null!==(e=x())?(u=i,64===n.charCodeAt(i)?(t="@",i++):(t=null,0===o&&a('"@"')),null!==t&&null!==(r=x())?t=[t,r]:(t=null,i=u),null!==(t=null!==t?t:"")?e=[e,t]:(e=null,i=l)):(e=null,i=l),null!==e&&(c=s,e=void(jn.call_id=n.substring(i,c))),null===e&&(i=s),e}function Pn(){var e;return null===(e=Mn())&&null===(e=qn())&&null===(e=Ln())&&(e=St()),e}function Mn(){var e,t,r,s,l,u;return s=i,l=i,"to-tag"===n.substr(i,6)?(e="to-tag",i+=6):(e=null,0===o&&a('"to-tag"')),null!==e&&null!==(t=M())&&null!==(r=N())?e=[e,t,r]:(e=null,i=l),null!==e&&(u=e[2],e=void(jn.to_tag=u)),null===e&&(i=s),e}function qn(){var e,t,r,s,l,u;return s=i,l=i,"from-tag"===n.substr(i,8)?(e="from-tag",i+=8):(e=null,0===o&&a('"from-tag"')),null!==e&&null!==(t=M())&&null!==(r=N())?e=[e,t,r]:(e=null,i=l),null!==e&&(u=e[2],e=void(jn.from_tag=u)),null===e&&(i=s),e}function Ln(){var e,t;return 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_.NotSupportedError('"reject" not supported for outgoing Message');if(this._is_replied)throw new Error("incoming Message already replied");if(t<300||t>=700)throw new TypeError("Invalid status_code: ".concat(t));this._is_replied=!0,this._request.reply(t,n,r,s)}},{key:"_receiveResponse",value:function(e){if(!this._closed)switch(!0){case/^1[0-9]{2}$/.test(e.status_code):break;case/^2[0-9]{2}$/.test(e.status_code):this._succeeded("remote",e);break;default:var 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e=this._display_name?'"'.concat(this._quote(this._display_name),'" '):"";for(var t in e+="<".concat(this._uri.toString(),">"),this._parameters)Object.prototype.hasOwnProperty.call(this._parameters,t)&&(e+=";".concat(t),null!==this._parameters[t]&&(e+="=".concat(this._parameters[t])));return e}},{key:"uri",get:function(){return this._uri}},{key:"display_name",get:function(){return this._display_name},set:function(e){this._display_name=0===e?"0":e}}]),e}()},{"./Grammar":7,"./URI":27}],12:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var u=e("events").EventEmitter,a=e("./Logger"),c=e("./Constants"),h=e("./SIPMessage"),d=e("./Utils"),f=e("./RequestSender"),_=e("./Exceptions"),p=new a("Options");t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(a,u);var t,n,r,l=o(a);function a(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,a),(t=l.call(this))._ua=e,t._request=null,t._closed=!1,t._direction=null,t._local_identity=null,t._remote_identity=null,t._is_replied=!1,t._data={},t}return t=a,(n=[{key:"send",value:function(e,t){var n=this,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},s=e;if(void 0===e)throw new TypeError("A target is required for OPTIONS");if(!(e=this._ua.normalizeTarget(e)))throw new TypeError("Invalid target: ".concat(s));var i=d.cloneArray(r.extraHeaders),o=d.cloneObject(r.eventHandlers),l=r.contentType||"application/sdp";for(var u in o)Object.prototype.hasOwnProperty.call(o,u)&&this.on(u,o[u]);i.push("Content-Type: ".concat(l)),this._request=new h.OutgoingRequest(c.OPTIONS,e,this._ua,null,i),t&&(this._request.body=t);var a=new f(this._ua,this._request,{onRequestTimeout:function(){n._onRequestTimeout()},onTransportError:function(){n._onTransportError()},onReceiveResponse:function(e){n._receiveResponse(e)}});this._newOptions("local",this._request),a.send()}},{key:"init_incoming",value:function(e){this._request=e,this._newOptions("remote",e),this._is_replied||(this._is_replied=!0,e.reply(200)),this._close()}},{key:"accept",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=d.cloneArray(e.extraHeaders),n=e.body;if("incoming"!==this._direction)throw new _.NotSupportedError('"accept" not supported for outgoing Options');if(this._is_replied)throw new Error("incoming Options already replied");this._is_replied=!0,this._request.reply(200,null,t,n)}},{key:"reject",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=e.status_code||480,n=e.reason_phrase,r=d.cloneArray(e.extraHeaders),s=e.body;if("incoming"!==this._direction)throw new _.NotSupportedError('"reject" not supported for outgoing Options');if(this._is_replied)throw new Error("incoming Options already replied");if(t<300||t>=700)throw new TypeError("Invalid status_code: ".concat(t));this._is_replied=!0,this._request.reply(t,n,r,s)}},{key:"_receiveResponse",value:function(e){if(!this._closed)switch(!0){case/^1[0-9]{2}$/.test(e.status_code):break;case/^2[0-9]{2}$/.test(e.status_code):this._succeeded("remote",e);break;default:var t=d.sipErrorCause(e.status_code);this._failed("remote",e,t)}}},{key:"_onRequestTimeout",value:function(){this._closed||this._failed("system",null,c.causes.REQUEST_TIMEOUT)}},{key:"_onTransportError",value:function(){this._closed||this._failed("system",null,c.causes.CONNECTION_ERROR)}},{key:"_close",value:function(){this._closed=!0,this._ua.destroyMessage(this)}},{key:"_newOptions",value:function(e,t){"remote"===e?(this._direction="incoming",this._local_identity=t.to,this._remote_identity=t.from):"local"===e&&(this._direction="outgoing",this._local_identity=t.from,this._remote_identity=t.to),this._ua.newOptions(this,{originator:e,message:this,request:t})}},{key:"_failed",value:function(e,t,n){p.debug("OPTIONS failed"),this._close(),p.debug('emit "failed"'),this.emit("failed",{originator:e,response:t||null,cause:n})}},{key:"_succeeded",value:function(e,t){p.debug("OPTIONS succeeded"),this._close(),p.debug('emit 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r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function s(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}var i=e("./Logger"),o=e("./Grammar"),l=e("./SIPMessage"),u=new i("Parser");function a(e,t){var n=t,r=0,s=0;if(e.substring(n,n+2).match(/(^\r\n)/))return-2;for(;0===r;){if(-1===(s=e.indexOf("\r\n",n)))return s;!e.substring(s+2,s+4).match(/(^\r\n)/)&&e.charAt(s+2).match(/(^\s+)/)?n=s+2:r=s}return r}function c(e,t,n,s){var i,u=t.indexOf(":",n),a=t.substring(n,u).trim(),c=t.substring(u+1,s).trim();switch(a.toLowerCase()){case"via":case"v":e.addHeader("via",c),1===e.getHeaders("via").length?(i=e.parseHeader("Via"))&&(e.via=i,e.via_branch=i.branch):i=0;break;case"from":case"f":e.setHeader("from",c),(i=e.parseHeader("from"))&&(e.from=i,e.from_tag=i.getParam("tag"));break;case"to":case"t":e.setHeader("to",c),(i=e.parseHeader("to"))&&(e.to=i,e.to_tag=i.getParam("tag"));break;case"record-route":if(-1===(i=o.parse(c,"Record_Route")))i=void 0;else{var h,d=r(i);try{for(d.s();!(h=d.n()).done;){var f=h.value;e.addHeader("record-route",c.substring(f.possition,f.offset)),e.headers["Record-Route"][e.getHeaders("record-route").length-1].parsed=f.parsed}}catch(e){d.e(e)}finally{d.f()}}break;case"call-id":case"i":e.setHeader("call-id",c),(i=e.parseHeader("call-id"))&&(e.call_id=c);break;case"contact":case"m":if(-1===(i=o.parse(c,"Contact")))i=void 0;else{var _,p=r(i);try{for(p.s();!(_=p.n()).done;){var m=_.value;e.addHeader("contact",c.substring(m.possition,m.offset)),e.headers.Contact[e.getHeaders("contact").length-1].parsed=m.parsed}}catch(e){p.e(e)}finally{p.f()}}break;case"content-length":case"l":e.setHeader("content-length",c),i=e.parseHeader("content-length");break;case"content-type":case"c":e.setHeader("content-type",c),i=e.parseHeader("content-type");break;case"cseq":e.setHeader("cseq",c),(i=e.parseHeader("cseq"))&&(e.cseq=i.value),e instanceof l.IncomingResponse&&(e.method=i.method);break;case"max-forwards":e.setHeader("max-forwards",c),i=e.parseHeader("max-forwards");break;case"www-authenticate":e.setHeader("www-authenticate",c),i=e.parseHeader("www-authenticate");break;case"proxy-authenticate":e.setHeader("proxy-authenticate",c),i=e.parseHeader("proxy-authenticate");break;case"session-expires":case"x":e.setHeader("session-expires",c),(i=e.parseHeader("session-expires"))&&(e.session_expires=i.expires,e.session_expires_refresher=i.refresher);break;case"refer-to":case"r":e.setHeader("refer-to",c),(i=e.parseHeader("refer-to"))&&(e.refer_to=i);break;case"replaces":e.setHeader("replaces",c),(i=e.parseHeader("replaces"))&&(e.replaces=i);break;case"event":case"o":e.setHeader("event",c),(i=e.parseHeader("event"))&&(e.event=i);break;default:e.addHeader(a,c),i=0}return void 0!==i||{error:'error parsing header "'.concat(a,'"')}}n.parseMessage=function(e,t){var n,r,s=e.indexOf("\r\n");if(-1!==s){var i=e.substring(0,s),h=o.parse(i,"Request_Response");if(-1!==h){h.status_code?((n=new l.IncomingResponse).status_code=h.status_code,n.reason_phrase=h.reason_phrase):((n=new l.IncomingRequest(t)).method=h.method,n.ruri=h.uri),n.data=e;for(var d=s+2;;){if(-2===(s=a(e,d))){r=d+2;break}if(-1===s)return void u.warn("parseMessage() | malformed message");if(!0!==(h=c(n,e,d,s)))return void u.warn("parseMessage() |",h.error);d=s+2}if(n.hasHeader("content-length")){var f=n.getHeader("content-length");n.body=e.substr(r,f)}else n.body=e.substring(r);return n}u.warn('parseMessage() | error parsing first line of SIP message: "'.concat(i,'"'))}else u.warn("parseMessage() | no CRLF found, not a SIP message")}},{"./Grammar":7,"./Logger":9,"./SIPMessage":21}],14:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof 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function")}(this,n),w.debug("new"),(r=t.call(this))._id=null,r._ua=e,r._status=I.STATUS_NULL,r._dialog=null,r._earlyDialogs={},r._contact=null,r._from_tag=null,r._to_tag=null,r._connection=null,r._connectionPromiseQueue=Promise.resolve(),r._request=null,r._is_canceled=!1,r._cancel_reason="",r._is_confirmed=!1,r._late_sdp=!1,r._rtcOfferConstraints=null,r._rtcAnswerConstraints=null,r._localMediaStream=null,r._localMediaStreamLocallyGenerated=!1,r._rtcReady=!0,r._iceReady=!1,r._timers={ackTimer:null,expiresTimer:null,invite2xxTimer:null,userNoAnswerTimer:null},r._direction=null,r._local_identity=null,r._remote_identity=null,r._start_time=null,r._end_time=null,r._tones=null,r._audioMuted=!1,r._videoMuted=!1,r._localHold=!1,r._remoteHold=!1,r._sessionTimers={enabled:r._ua.configuration.session_timers,refreshMethod:r._ua.configuration.session_timers_refresh_method,defaultExpires:_.SESSION_EXPIRES,currentExpires:null,running:!1,refresher:!1,timer:null},r._referSubscribers={},r._data={},r}return l(n,null,[{key:"C",get:function(){return I}}]),l(n,[{key:"isInProgress",value:function(){switch(this._status){case I.STATUS_NULL:case I.STATUS_INVITE_SENT:case I.STATUS_1XX_RECEIVED:case I.STATUS_INVITE_RECEIVED:case I.STATUS_WAITING_FOR_ANSWER:return!0;default:return!1}}},{key:"isEstablished",value:function(){switch(this._status){case I.STATUS_ANSWERED:case I.STATUS_WAITING_FOR_ACK:case I.STATUS_CONFIRMED:return!0;default:return!1}}},{key:"isEnded",value:function(){switch(this._status){case I.STATUS_CANCELED:case I.STATUS_TERMINATED:return!0;default:return!1}}},{key:"isMuted",value:function(){return{audio:this._audioMuted,video:this._videoMuted}}},{key:"isOnHold",value:function(){return{local:this._localHold,remote:this._remoteHold}}},{key:"connect",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=arguments.length>2?arguments[2]:void 0;w.debug("connect()");var r=e,s=v.cloneObject(t.eventHandlers),i=v.cloneArray(t.extraHeaders),o=v.cloneObject(t.mediaConstraints,{audio:!0,video:!0}),l=t.mediaStream||null,u=v.cloneObject(t.pcConfig,{iceServers:[]}),a=t.rtcConstraints||null,c=t.rtcOfferConstraints||null;if(this._rtcOfferConstraints=c,this._rtcAnswerConstraints=t.rtcAnswerConstraints||null,this._data=t.data||this._data,void 0===e)throw new TypeError("Not enough arguments");if(this._status!==I.STATUS_NULL)throw new p.InvalidStateError(this._status);if(!window.RTCPeerConnection)throw new p.NotSupportedError("WebRTC not supported");if(!(e=this._ua.normalizeTarget(e)))throw new TypeError("Invalid target: ".concat(r));for(var h in this._sessionTimers.enabled&&v.isDecimal(t.sessionTimersExpires)&&(t.sessionTimersExpires>=_.MIN_SESSION_EXPIRES?this._sessionTimers.defaultExpires=t.sessionTimersExpires:this._sessionTimers.defaultExpires=_.SESSION_EXPIRES),s)Object.prototype.hasOwnProperty.call(s,h)&&this.on(h,s[h]);this._from_tag=v.newTag();var d=t.anonymous||!1,f={from_tag:this._from_tag};this._contact=this._ua.contact.toString({anonymous:d,outbound:!0}),d?(f.from_display_name="Anonymous",f.from_uri=new R("sip","anonymous","anonymous.invalid"),i.push("P-Preferred-Identity: ".concat(this._ua.configuration.uri.toString())),i.push("Privacy: id")):t.fromUserName&&(f.from_uri=new R("sip",t.fromUserName,this._ua.configuration.uri.host),i.push("P-Preferred-Identity: ".concat(this._ua.configuration.uri.toString()))),t.fromDisplayName&&(f.from_display_name=t.fromDisplayName),i.push("Contact: ".concat(this._contact)),i.push("Content-Type: application/sdp"),this._sessionTimers.enabled&&i.push("Session-Expires: ".concat(this._sessionTimers.defaultExpires).concat(this._ua.configuration.session_timers_force_refresher?";refresher=uac":"")),this._request=new y.InitialOutgoingInviteRequest(e,this._ua,f,i),this._id=this._request.call_id+this._from_tag,this._createRTCConnection(u,a),this._direction="outgoing",this._local_identity=this._request.from,this._remote_identity=this._request.to,n&&n(this),this._newRTCSession("local",this._request),this._sendInitialRequest(o,c,l)}},{key:"init_incoming",value:function(e,t){var n,r=this;w.debug("init_incoming()");var s=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0;e.body&&"application/sdp"!==s?e.reply(415):(this._status=I.STATUS_INVITE_RECEIVED,this._from_tag=e.from_tag,this._id=e.call_id+this._from_tag,this._request=e,this._contact=this._ua.contact.toString(),e.hasHeader("expires")&&(n=1e3*e.getHeader("expires")),e.to_tag=v.newTag(),this._createDialog(e,"UAS",!0)?(e.body?this._late_sdp=!1:this._late_sdp=!0,this._status=I.STATUS_WAITING_FOR_ANSWER,this._timers.userNoAnswerTimer=setTimeout(function(){e.reply(408),r._failed("local",null,_.causes.NO_ANSWER)},this._ua.configuration.no_answer_timeout),n&&(this._timers.expiresTimer=setTimeout(function(){r._status===I.STATUS_WAITING_FOR_ANSWER&&(e.reply(487),r._failed("system",null,_.causes.EXPIRES))},n)),this._direction="incoming",this._local_identity=e.to,this._remote_identity=e.from,t&&t(this),this._newRTCSession("remote",e),this._status!==I.STATUS_TERMINATED&&(e.reply(180,null,["Contact: ".concat(this._contact)]),this._progress("local",null))):e.reply(500,"Missing Contact header field"))}},{key:"answer",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("answer()");var n=this._request,r=v.cloneArray(t.extraHeaders),i=v.cloneObject(t.mediaConstraints),o=t.mediaStream||null,l=v.cloneObject(t.pcConfig,{iceServers:[]}),u=t.rtcConstraints||null,a=t.rtcAnswerConstraints||null,c=v.cloneObject(t.rtcOfferConstraints),h=!1,d=!1,f=!1,m=!1;if(this._rtcAnswerConstraints=a,this._rtcOfferConstraints=t.rtcOfferConstraints||null,this._data=t.data||this._data,"incoming"!==this._direction)throw new p.NotSupportedError('"answer" not supported for outgoing RTCSession');if(this._status!==I.STATUS_WAITING_FOR_ANSWER)throw new p.InvalidStateError(this._status);if(this._sessionTimers.enabled&&v.isDecimal(t.sessionTimersExpires)&&(t.sessionTimersExpires>=_.MIN_SESSION_EXPIRES?this._sessionTimers.defaultExpires=t.sessionTimersExpires:this._sessionTimers.defaultExpires=_.SESSION_EXPIRES),this._status=I.STATUS_ANSWERED,this._createDialog(n,"UAS")){clearTimeout(this._timers.userNoAnswerTimer),r.unshift("Contact: ".concat(this._contact));var g=n.parseSDP();Array.isArray(g.media)||(g.media=[g.media]);var y,T=s(g.media);try{for(T.s();!(y=T.n()).done;){var C=y.value;"audio"===C.type&&(h=!0,C.direction&&"sendrecv"!==C.direction||(f=!0)),"video"===C.type&&(d=!0,C.direction&&"sendrecv"!==C.direction||(m=!0))}}catch(e){T.e(e)}finally{T.f()}if(o&&!1===i.audio){var b,S=s(o.getAudioTracks());try{for(S.s();!(b=S.n()).done;){var E=b.value;o.removeTrack(E)}}catch(e){S.e(e)}finally{S.f()}}if(o&&!1===i.video){var A,R=s(o.getVideoTracks());try{for(R.s();!(A=R.n()).done;){var O=A.value;o.removeTrack(O)}}catch(e){R.e(e)}finally{R.f()}}o||void 0!==i.audio||(i.audio=f),o||void 0!==i.video||(i.video=m),o||h||c.offerToReceiveAudio||(i.audio=!1),o||d||c.offerToReceiveVideo||(i.video=!1),this._createRTCConnection(l,u),Promise.resolve().then(function(){return o||(i.audio||i.video?(e._localMediaStreamLocallyGenerated=!0,navigator.mediaDevices.getUserMedia(i).catch(function(t){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");throw n.reply(480),e._failed("local",null,_.causes.USER_DENIED_MEDIA_ACCESS),w.warn('emit "getusermediafailed" [error:%o]',t),e.emit("getusermediafailed",t),new Error("getUserMedia() failed")})):void 0)}).then(function(t){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");e._localMediaStream=t,t&&t.getTracks().forEach(function(n){e._connection.addTrack(n,t)})}).then(function(){if(!e._late_sdp){var t={originator:"remote",type:"offer",sdp:n.body};w.debug('emit "sdp"'),e.emit("sdp",t);var r=new RTCSessionDescription({type:"offer",sdp:t.sdp});return e._connectionPromiseQueue=e._connectionPromiseQueue.then(function(){return e._connection.setRemoteDescription(r)}).catch(function(t){throw n.reply(488),e._failed("system",null,_.causes.WEBRTC_ERROR),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',t),e.emit("peerconnection:setremotedescriptionfailed",t),new Error("peerconnection.setRemoteDescription() failed")}),e._connectionPromiseQueue}}).then(function(){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");return e._connecting(n),e._late_sdp?e._createLocalDescription("offer",e._rtcOfferConstraints).catch(function(){throw n.reply(500),new Error("_createLocalDescription() failed")}):e._createLocalDescription("answer",a).catch(function(){throw n.reply(500),new Error("_createLocalDescription() failed")})}).then(function(t){if(e._status===I.STATUS_TERMINATED)throw new Error("terminated");e._handleSessionTimersInIncomingRequest(n,r),n.reply(200,null,r,t,function(){e._status=I.STATUS_WAITING_FOR_ACK,e._setInvite2xxTimer(n,t),e._setACKTimer(),e._accepted("local")},function(){e._failed("system",null,_.causes.CONNECTION_ERROR)})}).catch(function(t){e._status!==I.STATUS_TERMINATED&&w.warn(t)})}else n.reply(500,"Error creating dialog")}},{key:"terminate",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("terminate()");var n,r=t.cause||_.causes.BYE,s=v.cloneArray(t.extraHeaders),i=t.body,o=t.status_code,l=t.reason_phrase;if(this._status===I.STATUS_TERMINATED)throw new p.InvalidStateError(this._status);switch(this._status){case I.STATUS_NULL:case I.STATUS_INVITE_SENT:case I.STATUS_1XX_RECEIVED:if(w.debug("canceling session"),o&&(o<200||o>=700))throw new TypeError("Invalid status_code: ".concat(o));o&&(l=l||_.REASON_PHRASE[o]||"",n="SIP ;cause=".concat(o,' ;text="').concat(l,'"')),this._status===I.STATUS_NULL||this._status===I.STATUS_INVITE_SENT?(this._is_canceled=!0,this._cancel_reason=n):this._status===I.STATUS_1XX_RECEIVED&&this._request.cancel(n),this._status=I.STATUS_CANCELED,this._failed("local",null,_.causes.CANCELED);break;case I.STATUS_WAITING_FOR_ANSWER:case I.STATUS_ANSWERED:if(w.debug("rejecting session"),(o=o||480)<300||o>=700)throw new TypeError("Invalid status_code: ".concat(o));this._request.reply(o,l,s,i),this._failed("local",null,_.causes.REJECTED);break;case I.STATUS_WAITING_FOR_ACK:case I.STATUS_CONFIRMED:if(w.debug("terminating session"),l=t.reason_phrase||_.REASON_PHRASE[o]||"",o&&(o<200||o>=700))throw new TypeError("Invalid status_code: ".concat(o));if(o&&s.push("Reason: SIP ;cause=".concat(o,'; text="').concat(l,'"')),this._status===I.STATUS_WAITING_FOR_ACK&&"incoming"===this._direction&&this._request.server_transaction.state!==m.C.STATUS_TERMINATED){var u=this._dialog;this.receiveRequest=function(t){t.method===_.ACK&&(e.sendRequest(_.BYE,{extraHeaders:s,body:i}),u.terminate())},this._request.server_transaction.on("stateChanged",function(){e._request.server_transaction.state===m.C.STATUS_TERMINATED&&(e.sendRequest(_.BYE,{extraHeaders:s,body:i}),u.terminate())}),this._ended("local",null,r),this._dialog=u,this._ua.newDialog(u)}else this.sendRequest(_.BYE,{extraHeaders:s,body:i}),this._ended("local",null,r)}}},{key:"sendDTMF",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};w.debug("sendDTMF() | tones: %s",e);var n=0,r=t.duration||null,s=t.interToneGap||null,i=t.transportType||_.DTMF_TRANSPORT.INFO;if(void 0===e)throw new TypeError("Not enough arguments");if(this._status!==I.STATUS_CONFIRMED&&this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_1XX_RECEIVED)throw new p.InvalidStateError(this._status);if(i!==_.DTMF_TRANSPORT.INFO&&i!==_.DTMF_TRANSPORT.RFC2833)throw new TypeError("invalid transportType: ".concat(i));if("number"==typeof e&&(e=e.toString()),!e||"string"!=typeof e||!e.match(/^[0-9A-DR#*,]+$/i))throw new TypeError("Invalid tones: ".concat(e));if(r&&!v.isDecimal(r))throw new TypeError("Invalid tone duration: ".concat(r));if(r?r<b.C.MIN_DURATION?(w.debug('"duration" value is lower than the minimum allowed, setting it to '.concat(b.C.MIN_DURATION," milliseconds")),r=b.C.MIN_DURATION):r>b.C.MAX_DURATION?(w.debug('"duration" value is greater than the maximum allowed, setting it to '.concat(b.C.MAX_DURATION," milliseconds")),r=b.C.MAX_DURATION):r=Math.abs(r):r=b.C.DEFAULT_DURATION,t.duration=r,s&&!v.isDecimal(s))throw new TypeError("Invalid interToneGap: ".concat(s));if(s?s<b.C.MIN_INTER_TONE_GAP?(w.debug('"interToneGap" value is lower than the minimum allowed, setting it to '.concat(b.C.MIN_INTER_TONE_GAP," milliseconds")),s=b.C.MIN_INTER_TONE_GAP):s=Math.abs(s):s=b.C.DEFAULT_INTER_TONE_GAP,i!==_.DTMF_TRANSPORT.RFC2833)this._tones?this._tones+=e:(this._tones=e,function e(){var i=this;var o;if(this._status===I.STATUS_TERMINATED||!this._tones||n>=this._tones.length)return void(this._tones=null);var l=this._tones[n];n+=1;if(","===l)o=2e3;else{var u=new b(this);t.eventHandlers={onFailed:function(){i._tones=null}},u.send(l,t),o=r+s}setTimeout(e.bind(this),o)}.call(this));else{var o=this._getDTMFRTPSender();o&&(e=o.toneBuffer+e,o.insertDTMF(e,r,s))}}},{key:"sendInfo",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(w.debug("sendInfo()"),this._status!==I.STATUS_CONFIRMED&&this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_1XX_RECEIVED)throw new p.InvalidStateError(this._status);new S(this).send(e,t,n)}},{key:"mute",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{audio:!0,video:!1};w.debug("mute()");var t=!1,n=!1;!1===this._audioMuted&&e.audio&&(t=!0,this._audioMuted=!0,this._toggleMuteAudio(!0)),!1===this._videoMuted&&e.video&&(n=!0,this._videoMuted=!0,this._toggleMuteVideo(!0)),!0!==t&&!0!==n||this._onmute({audio:t,video:n})}},{key:"unmute",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{audio:!0,video:!0};w.debug("unmute()");var t=!1,n=!1;!0===this._audioMuted&&e.audio&&(t=!0,this._audioMuted=!1,!1===this._localHold&&this._toggleMuteAudio(!1)),!0===this._videoMuted&&e.video&&(n=!0,this._videoMuted=!1,!1===this._localHold&&this._toggleMuteVideo(!1)),!0!==t&&!0!==n||this._onunmute({audio:t,video:n})}},{key:"hold",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=arguments.length>1?arguments[1]:void 0;if(w.debug("hold()"),this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!0===this._localHold)return!1;if(!this._isReadyToReOffer())return!1;this._localHold=!0,this._onhold("local");var r={succeeded:function(){n&&n()},failed:function(){e.terminate({cause:_.causes.WEBRTC_ERROR,status_code:500,reason_phrase:"Hold Failed"})}};return t.useUpdate?this._sendUpdate({sdpOffer:!0,eventHandlers:r,extraHeaders:t.extraHeaders}):this._sendReinvite({eventHandlers:r,extraHeaders:t.extraHeaders}),!0}},{key:"unhold",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=arguments.length>1?arguments[1]:void 0;if(w.debug("unhold()"),this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!1===this._localHold)return!1;if(!this._isReadyToReOffer())return!1;this._localHold=!1,this._onunhold("local");var r={succeeded:function(){n&&n()},failed:function(){e.terminate({cause:_.causes.WEBRTC_ERROR,status_code:500,reason_phrase:"Unhold Failed"})}};return t.useUpdate?this._sendUpdate({sdpOffer:!0,eventHandlers:r,extraHeaders:t.extraHeaders}):this._sendReinvite({eventHandlers:r,extraHeaders:t.extraHeaders}),!0}},{key:"renegotiate",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=arguments.length>1?arguments[1]:void 0;w.debug("renegotiate()");var r=t.rtcOfferConstraints||null;if(this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!this._isReadyToReOffer())return!1;var s={succeeded:function(){n&&n()},failed:function(){e.terminate({cause:_.causes.WEBRTC_ERROR,status_code:500,reason_phrase:"Media Renegotiation Failed"})}};return this._setLocalMediaStatus(),t.useUpdate?this._sendUpdate({sdpOffer:!0,eventHandlers:s,rtcOfferConstraints:r,extraHeaders:t.extraHeaders}):this._sendReinvite({eventHandlers:s,rtcOfferConstraints:r,extraHeaders:t.extraHeaders}),!0}},{key:"refer",value:function(e,t){var n=this;w.debug("refer()");var r=e;if(this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;if(!(e=this._ua.normalizeTarget(e)))throw new TypeError("Invalid target: ".concat(r));var s=new A(this);s.sendRefer(e,t);var i=s.id;return this._referSubscribers[i]=s,s.on("requestFailed",function(){delete n._referSubscribers[i]}),s.on("accepted",function(){delete n._referSubscribers[i]}),s.on("failed",function(){delete n._referSubscribers[i]}),s}},{key:"sendRequest",value:function(e,t){return w.debug("sendRequest()"),this._dialog.sendRequest(e,t)}},{key:"receiveRequest",value:function(e){var t=this;if(w.debug("receiveRequest()"),e.method===_.CANCEL)this._status!==I.STATUS_WAITING_FOR_ANSWER&&this._status!==I.STATUS_ANSWERED||(this._status=I.STATUS_CANCELED,this._request.reply(487),this._failed("remote",e,_.causes.CANCELED));else switch(e.method){case _.ACK:if(this._status!==I.STATUS_WAITING_FOR_ACK)return;if(this._status=I.STATUS_CONFIRMED,clearTimeout(this._timers.ackTimer),clearTimeout(this._timers.invite2xxTimer),this._late_sdp){if(!e.body){this.terminate({cause:_.causes.MISSING_SDP,status_code:400});break}var n={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",n);var r=new RTCSessionDescription({type:"answer",sdp:n.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(r)}).then(function(){t._is_confirmed||t._confirmed("remote",e)}).catch(function(e){t.terminate({cause:_.causes.BAD_MEDIA_DESCRIPTION,status_code:488}),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)})}else this._is_confirmed||this._confirmed("remote",e);break;case _.BYE:this._status===I.STATUS_CONFIRMED||this._status===I.STATUS_WAITING_FOR_ACK?(e.reply(200),this._ended("remote",e,_.causes.BYE)):this._status===I.STATUS_INVITE_RECEIVED||this._status===I.STATUS_WAITING_FOR_ANSWER?(e.reply(200),this._request.reply(487,"BYE Received"),this._ended("remote",e,_.causes.BYE)):e.reply(403,"Wrong Status");break;case _.INVITE:this._status===I.STATUS_CONFIRMED?e.hasHeader("replaces")?this._receiveReplaces(e):this._receiveReinvite(e):e.reply(403,"Wrong Status");break;case _.INFO:if(this._status===I.STATUS_1XX_RECEIVED||this._status===I.STATUS_WAITING_FOR_ANSWER||this._status===I.STATUS_ANSWERED||this._status===I.STATUS_WAITING_FOR_ACK||this._status===I.STATUS_CONFIRMED){var s=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0;s&&s.match(/^application\/dtmf-relay/i)?new b(this).init_incoming(e):void 0!==s?new S(this).init_incoming(e):e.reply(415)}else e.reply(403,"Wrong Status");break;case _.UPDATE:this._status===I.STATUS_CONFIRMED?this._receiveUpdate(e):e.reply(403,"Wrong Status");break;case _.REFER:this._status===I.STATUS_CONFIRMED?this._receiveRefer(e):e.reply(403,"Wrong Status");break;case _.NOTIFY:this._status===I.STATUS_CONFIRMED?this._receiveNotify(e):e.reply(403,"Wrong Status");break;default:e.reply(501)}}},{key:"onTransportError",value:function(){w.warn("onTransportError()"),this._status!==I.STATUS_TERMINATED&&this.terminate({status_code:500,reason_phrase:_.causes.CONNECTION_ERROR,cause:_.causes.CONNECTION_ERROR})}},{key:"onRequestTimeout",value:function(){w.warn("onRequestTimeout()"),this._status!==I.STATUS_TERMINATED&&this.terminate({status_code:408,reason_phrase:_.causes.REQUEST_TIMEOUT,cause:_.causes.REQUEST_TIMEOUT})}},{key:"onDialogError",value:function(){w.warn("onDialogError()"),this._status!==I.STATUS_TERMINATED&&this.terminate({status_code:500,reason_phrase:_.causes.DIALOG_ERROR,cause:_.causes.DIALOG_ERROR})}},{key:"newDTMF",value:function(e){w.debug("newDTMF()"),this.emit("newDTMF",e)}},{key:"newInfo",value:function(e){w.debug("newInfo()"),this.emit("newInfo",e)}},{key:"_isReadyToReOffer",value:function(){return this._rtcReady?this._dialog?!0!==this._dialog.uac_pending_reply&&!0!==this._dialog.uas_pending_reply||(w.debug("_isReadyToReOffer() | there is another INVITE/UPDATE transaction in progress"),!1):(w.debug("_isReadyToReOffer() | session not established yet"),!1):(w.debug("_isReadyToReOffer() | internal WebRTC status not ready"),!1)}},{key:"_close",value:function(){if(w.debug("close()"),this._localMediaStream&&this._localMediaStreamLocallyGenerated&&(w.debug("close() | closing local MediaStream"),v.closeMediaStream(this._localMediaStream)),this._status!==I.STATUS_TERMINATED){if(this._status=I.STATUS_TERMINATED,this._connection)try{this._connection.close()}catch(e){w.warn("close() | error closing the RTCPeerConnection: %o",e)}for(var e in this._timers)Object.prototype.hasOwnProperty.call(this._timers,e)&&clearTimeout(this._timers[e]);for(var t in clearTimeout(this._sessionTimers.timer),this._dialog&&(this._dialog.terminate(),delete this._dialog),this._earlyDialogs)Object.prototype.hasOwnProperty.call(this._earlyDialogs,t)&&(this._earlyDialogs[t].terminate(),delete this._earlyDialogs[t]);for(var n in this._referSubscribers)Object.prototype.hasOwnProperty.call(this._referSubscribers,n)&&delete this._referSubscribers[n];this._ua.destroyRTCSession(this)}}},{key:"_setInvite2xxTimer",value:function(e,t){var n=g.T1;this._timers.invite2xxTimer=setTimeout(function r(){this._status===I.STATUS_WAITING_FOR_ACK&&(e.reply(200,null,["Contact: ".concat(this._contact)],t),n<g.T2&&(n*=2)>g.T2&&(n=g.T2),this._timers.invite2xxTimer=setTimeout(r.bind(this),n))}.bind(this),n)}},{key:"_setACKTimer",value:function(){var e=this;this._timers.ackTimer=setTimeout(function(){e._status===I.STATUS_WAITING_FOR_ACK&&(w.debug("no ACK received, terminating the session"),clearTimeout(e._timers.invite2xxTimer),e.sendRequest(_.BYE),e._ended("remote",null,_.causes.NO_ACK))},g.TIMER_H)}},{key:"_createRTCConnection",value:function(e,t){var n=this;this._connection=new RTCPeerConnection(e,t),this._connection.addEventListener("iceconnectionstatechange",function(){"failed"===n._connection.iceConnectionState&&n.terminate({cause:_.causes.RTP_TIMEOUT,status_code:408,reason_phrase:_.causes.RTP_TIMEOUT})}),w.debug('emit "peerconnection"'),this.emit("peerconnection",{peerconnection:this._connection})}},{key:"_createLocalDescription",value:function(e,t){var n=this;if(w.debug("createLocalDescription()"),"offer"!==e&&"answer"!==e)throw new Error('createLocalDescription() | invalid type "'.concat(e,'"'));var r=this._connection;return this._rtcReady=!1,Promise.resolve().then(function(){return"offer"===e?r.createOffer(t).catch(function(e){return w.warn('emit "peerconnection:createofferfailed" [error:%o]',e),n.emit("peerconnection:createofferfailed",e),Promise.reject(e)}):r.createAnswer(t).catch(function(e){return w.warn('emit "peerconnection:createanswerfailed" [error:%o]',e),n.emit("peerconnection:createanswerfailed",e),Promise.reject(e)})}).then(function(e){return r.setLocalDescription(e).catch(function(e){return n._rtcReady=!0,w.warn('emit "peerconnection:setlocaldescriptionfailed" [error:%o]',e),n.emit("peerconnection:setlocaldescriptionfailed",e),Promise.reject(e)})}).then(function(){var s=t&&t.iceRestart;if("complete"===r.iceGatheringState&&!s||"gathering"===r.iceGatheringState&&n._iceReady){n._rtcReady=!0;var i={originator:"local",type:e,sdp:r.localDescription.sdp};return w.debug('emit "sdp"'),n.emit("sdp",i),Promise.resolve(i.sdp)}return new Promise(function(t){var s,i,o=!1;n._iceReady=!1;var l=function(){if(!o){r.removeEventListener("icecandidate",s),r.removeEventListener("icegatheringstatechange",i),o=!0,n._rtcReady=!0,n._iceReady=!0;var l={originator:"local",type:e,sdp:r.localDescription.sdp};w.debug('emit "sdp"'),n.emit("sdp",l),t(l.sdp)}};r.addEventListener("icecandidate",s=function(e){var t=e.candidate;t?n.emit("icecandidate",{candidate:t,ready:l}):l()}),r.addEventListener("icegatheringstatechange",i=function(){"complete"===r.iceGatheringState&&l()})})})}},{key:"_createDialog",value:function(e,t,n){var r="UAS"===t?e.to_tag:e.from_tag,s="UAS"===t?e.from_tag:e.to_tag,i=e.call_id+r+s,o=this._earlyDialogs[i];if(n)return!!o||((o=new T(this,e,t,T.C.STATUS_EARLY)).error?(w.debug(o.error),this._failed("remote",e,_.causes.INTERNAL_ERROR),!1):(this._earlyDialogs[i]=o,!0));if(this._from_tag=e.from_tag,this._to_tag=e.to_tag,o)return o.update(e,t),this._dialog=o,delete this._earlyDialogs[i],!0;var l=new T(this,e,t);return l.error?(w.debug(l.error),this._failed("remote",e,_.causes.INTERNAL_ERROR),!1):(this._dialog=l,!0)}},{key:"_receiveReinvite",value:function(e){var t=this;w.debug("receiveReinvite()");var n=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0,r={request:e,callback:void 0,reject:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};s=!0;var n=t.status_code||403,r=t.reason_phrase||"",i=v.cloneArray(t.extraHeaders);if(this._status!==I.STATUS_CONFIRMED)return!1;if(n<300||n>=700)throw new TypeError("Invalid status_code: ".concat(n));e.reply(n,r,i)}.bind(this)},s=!1;if(this.emit("reinvite",r),!s){if(this._late_sdp=!1,!e.body)return this._late_sdp=!0,this._remoteHold&&(this._remoteHold=!1,this._onunhold("remote")),void(this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._createLocalDescription("offer",t._rtcOfferConstraints)}).then(function(e){i.call(t,e)}).catch(function(){e.reply(500)}));if("application/sdp"!==n)return w.debug("invalid Content-Type"),void e.reply(415);this._processInDialogSdpOffer(e).then(function(e){t._status!==I.STATUS_TERMINATED&&i.call(t,e)}).catch(function(e){w.warn(e)})}function i(t){var n=this,s=["Contact: ".concat(this._contact)];this._handleSessionTimersInIncomingRequest(e,s),this._late_sdp&&(t=this._mangleOffer(t)),e.reply(200,null,s,t,function(){n._status=I.STATUS_WAITING_FOR_ACK,n._setInvite2xxTimer(e,t),n._setACKTimer()}),"function"==typeof r.callback&&r.callback()}}},{key:"_receiveUpdate",value:function(e){var t=this;w.debug("receiveUpdate()");var n=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0,r={request:e,callback:void 0,reject:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};s=!0;var n=t.status_code||403,r=t.reason_phrase||"",i=v.cloneArray(t.extraHeaders);if(this._status!==I.STATUS_CONFIRMED)return!1;if(n<300||n>=700)throw new TypeError("Invalid status_code: ".concat(n));e.reply(n,r,i)}.bind(this)},s=!1;if(this.emit("update",r),!s)if(e.body){if("application/sdp"!==n)return w.debug("invalid Content-Type"),void e.reply(415);this._processInDialogSdpOffer(e).then(function(e){t._status!==I.STATUS_TERMINATED&&i.call(t,e)}).catch(function(e){w.warn(e)})}else i.call(this,null);function i(t){var n=["Contact: ".concat(this._contact)];this._handleSessionTimersInIncomingRequest(e,n),e.reply(200,null,n,t),"function"==typeof r.callback&&r.callback()}}},{key:"_processInDialogSdpOffer",value:function(e){var t=this;w.debug("_processInDialogSdpOffer()");var n,r=e.parseSDP(),i=!1,o=s(r.media);try{for(o.s();!(n=o.n()).done;){var l=n.value;if(-1!==O.indexOf(l.type)){var u=l.direction||r.direction||"sendrecv";if("sendonly"!==u&&"inactive"!==u){i=!1;break}i=!0}}}catch(e){o.e(e)}finally{o.f()}var a={originator:"remote",type:"offer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",a);var c=new RTCSessionDescription({type:"offer",sdp:a.sdp});return this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){if(t._status===I.STATUS_TERMINATED)throw new Error("terminated");return t._connection.setRemoteDescription(c).catch(function(n){throw e.reply(488),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',n),t.emit("peerconnection:setremotedescriptionfailed",n),n})}).then(function(){if(t._status===I.STATUS_TERMINATED)throw new Error("terminated");!0===t._remoteHold&&!1===i?(t._remoteHold=!1,t._onunhold("remote")):!1===t._remoteHold&&!0===i&&(t._remoteHold=!0,t._onhold("remote"))}).then(function(){if(t._status===I.STATUS_TERMINATED)throw new Error("terminated");return t._createLocalDescription("answer",t._rtcAnswerConstraints).catch(function(t){throw e.reply(500),w.warn('emit "peerconnection:createtelocaldescriptionfailed" [error:%o]',t),t})}).catch(function(e){w.warn("_processInDialogSdpOffer() failed [error: %o]",e)}),this._connectionPromiseQueue}},{key:"_receiveRefer",value:function(e){var t=this;if(w.debug("receiveRefer()"),!e.refer_to)return w.debug("no Refer-To header field present in REFER"),void e.reply(400);if(e.refer_to.uri.scheme!==_.SIP)return w.debug("Refer-To header field points to a non-SIP URI scheme"),void e.reply(416);e.reply(202);var r=new E(this,e.cseq);w.debug('emit "refer"'),this.emit("refer",{request:e,accept:function(s,i){(function(t){var s=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};if(t="function"==typeof t?t:null,this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;var i=new n(this._ua);if(i.on("progress",function(e){var t=e.response;r.notify(t.status_code,t.reason_phrase)}),i.on("accepted",function(e){var t=e.response;r.notify(t.status_code,t.reason_phrase)}),i.on("_failed",function(e){var t=e.message,n=e.cause;t?r.notify(t.status_code,t.reason_phrase):r.notify(487,n)}),e.refer_to.uri.hasHeader("replaces")){var o=decodeURIComponent(e.refer_to.uri.getHeader("replaces"));s.extraHeaders=v.cloneArray(s.extraHeaders),s.extraHeaders.push("Replaces: ".concat(o))}i.connect(e.refer_to.uri.toAor(),s,t)}).call(t,s,i)},reject:function(){(function(){r.notify(603)}).call(t)}})}},{key:"_receiveNotify",value:function(e){switch(w.debug("receiveNotify()"),e.event||e.reply(400),e.event.event){case"refer":var t,n;if(e.event.params&&e.event.params.id)t=e.event.params.id,n=this._referSubscribers[t];else{if(1!==Object.keys(this._referSubscribers).length)return void e.reply(400,"Missing event id parameter");n=this._referSubscribers[Object.keys(this._referSubscribers)[0]]}if(!n)return void e.reply(481,"Subscription does not exist");n.receiveNotify(e),e.reply(200);break;default:e.reply(489)}}},{key:"_receiveReplaces",value:function(e){var t=this;w.debug("receiveReplaces()"),this.emit("replaces",{request:e,accept:function(r){(function(t){var r=this;if(this._status!==I.STATUS_WAITING_FOR_ACK&&this._status!==I.STATUS_CONFIRMED)return!1;var s=new n(this._ua);s.on("confirmed",function(){r.terminate()}),s.init_incoming(e,t)}).call(t,r)},reject:function(){(function(){w.debug("Replaced INVITE rejected by the user"),e.reply(486)}).call(t)}})}},{key:"_sendInitialRequest",value:function(e,t,n){var r=this,s=new C(this._ua,this._request,{onRequestTimeout:function(){r.onRequestTimeout()},onTransportError:function(){r.onTransportError()},onAuthenticated:function(e){r._request=e},onReceiveResponse:function(e){r._receiveInviteResponse(e)}});Promise.resolve().then(function(){return n||(e.audio||e.video?(r._localMediaStreamLocallyGenerated=!0,navigator.mediaDevices.getUserMedia(e).catch(function(e){if(r._status===I.STATUS_TERMINATED)throw new Error("terminated");throw r._failed("local",null,_.causes.USER_DENIED_MEDIA_ACCESS),w.warn('emit "getusermediafailed" [error:%o]',e),r.emit("getusermediafailed",e),e})):void 0)}).then(function(e){if(r._status===I.STATUS_TERMINATED)throw new Error("terminated");return r._localMediaStream=e,e&&e.getTracks().forEach(function(t){r._connection.addTrack(t,e)}),r._connecting(r._request),r._createLocalDescription("offer",t).catch(function(e){throw r._failed("local",null,_.causes.WEBRTC_ERROR),e})}).then(function(e){if(r._is_canceled||r._status===I.STATUS_TERMINATED)throw new Error("terminated");r._request.body=e,r._status=I.STATUS_INVITE_SENT,w.debug('emit "sending" [request:%o]',r._request),r.emit("sending",{request:r._request}),s.send()}).catch(function(e){r._status!==I.STATUS_TERMINATED&&w.warn(e)})}},{key:"_getDTMFRTPSender",value:function(){var e=this._connection.getSenders().find(function(e){return e.track&&"audio"===e.track.kind});if(e&&e.dtmf)return e.dtmf;w.warn("sendDTMF() | no local audio track to send DTMF with")}},{key:"_receiveInviteResponse",value:function(e){var t=this;if(w.debug("receiveInviteResponse()"),this._dialog&&e.status_code>=200&&e.status_code<=299){if(this._dialog.id.call_id===e.call_id&&this._dialog.id.local_tag===e.from_tag&&this._dialog.id.remote_tag===e.to_tag)return void this.sendRequest(_.ACK);var n=new T(this,e,"UAC");return void 0!==n.error?void w.debug(n.error):(this.sendRequest(_.ACK),void this.sendRequest(_.BYE))}if(this._is_canceled)e.status_code>=100&&e.status_code<200?this._request.cancel(this._cancel_reason):e.status_code>=200&&e.status_code<299&&this._acceptAndTerminate(e);else if(this._status===I.STATUS_INVITE_SENT||this._status===I.STATUS_1XX_RECEIVED)switch(!0){case/^100$/.test(e.status_code):this._status=I.STATUS_1XX_RECEIVED;break;case/^1[0-9]{2}$/.test(e.status_code):if(!e.to_tag){w.debug("1xx response received without to tag");break}if(e.hasHeader("contact")&&!this._createDialog(e,"UAC",!0))break;if(this._status=I.STATUS_1XX_RECEIVED,!e.body){this._progress("remote",e);break}var r={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",r);var s=new RTCSessionDescription({type:"answer",sdp:r.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(s)}).then(function(){return t._progress("remote",e)}).catch(function(e){w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)});break;case/^2[0-9]{2}$/.test(e.status_code):if(this._status=I.STATUS_CONFIRMED,!e.body){this._acceptAndTerminate(e,400,_.causes.MISSING_SDP),this._failed("remote",e,_.causes.BAD_MEDIA_DESCRIPTION);break}if(!this._createDialog(e,"UAC"))break;var i={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",i);var o=new RTCSessionDescription({type:"answer",sdp:i.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){if("stable"===t._connection.signalingState)return t._connection.createOffer(t._rtcOfferConstraints).then(function(e){return t._connection.setLocalDescription(e)}).catch(function(n){t._acceptAndTerminate(e,500,n.toString()),t._failed("local",e,_.causes.WEBRTC_ERROR)})}).then(function(){t._connection.setRemoteDescription(o).then(function(){t._handleSessionTimersInIncomingResponse(e),t._accepted("remote",e),t.sendRequest(_.ACK),t._confirmed("local",null)}).catch(function(n){t._acceptAndTerminate(e,488,"Not Acceptable Here"),t._failed("remote",e,_.causes.BAD_MEDIA_DESCRIPTION),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',n),t.emit("peerconnection:setremotedescriptionfailed",n)})});break;default:var l=v.sipErrorCause(e.status_code);this._failed("remote",e,l)}}},{key:"_sendReinvite",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("sendReinvite()");var n=v.cloneArray(t.extraHeaders),r=v.cloneObject(t.eventHandlers),s=t.rtcOfferConstraints||this._rtcOfferConstraints||null,i=!1;function o(e){r.failed&&r.failed(e)}n.push("Contact: ".concat(this._contact)),n.push("Content-Type: application/sdp"),this._sessionTimers.running&&n.push("Session-Expires: ".concat(this._sessionTimers.currentExpires,";refresher=").concat(this._sessionTimers.refresher?"uac":"uas")),this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return e._createLocalDescription("offer",s)}).then(function(t){var s={originator:"local",type:"offer",sdp:t=e._mangleOffer(t)};w.debug('emit "sdp"'),e.emit("sdp",s),e.sendRequest(_.INVITE,{extraHeaders:n,body:t,eventHandlers:{onSuccessResponse:function(t){(function(e){var t=this;if(this._status===I.STATUS_TERMINATED)return;if(this.sendRequest(_.ACK),i)return;if(this._handleSessionTimersInIncomingResponse(e),!e.body)return void o.call(this);if(!e.hasHeader("Content-Type")||"application/sdp"!==e.getHeader("Content-Type").toLowerCase())return void o.call(this);var n={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",n);var s=new RTCSessionDescription({type:"answer",sdp:n.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(s)}).then(function(){r.succeeded&&r.succeeded(e)}).catch(function(e){o.call(t),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)})}).call(e,t),i=!0},onErrorResponse:function(t){o.call(e,t)},onTransportError:function(){e.onTransportError()},onRequestTimeout:function(){e.onRequestTimeout()},onDialogError:function(){e.onDialogError()}}})}).catch(function(){o()})}},{key:"_sendUpdate",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};w.debug("sendUpdate()");var n=v.cloneArray(t.extraHeaders),r=v.cloneObject(t.eventHandlers),s=t.rtcOfferConstraints||this._rtcOfferConstraints||null,i=t.sdpOffer||!1,o=!1;function l(e){var t=this;if(this._status!==I.STATUS_TERMINATED&&!o)if(this._handleSessionTimersInIncomingResponse(e),i){if(!e.body)return void u.call(this);if(!e.hasHeader("Content-Type")||"application/sdp"!==e.getHeader("Content-Type").toLowerCase())return void u.call(this);var n={originator:"remote",type:"answer",sdp:e.body};w.debug('emit "sdp"'),this.emit("sdp",n);var s=new RTCSessionDescription({type:"answer",sdp:n.sdp});this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return t._connection.setRemoteDescription(s)}).then(function(){r.succeeded&&r.succeeded(e)}).catch(function(e){u.call(t),w.warn('emit "peerconnection:setremotedescriptionfailed" [error:%o]',e),t.emit("peerconnection:setremotedescriptionfailed",e)})}else r.succeeded&&r.succeeded(e)}function u(e){r.failed&&r.failed(e)}n.push("Contact: ".concat(this._contact)),this._sessionTimers.running&&n.push("Session-Expires: ".concat(this._sessionTimers.currentExpires,";refresher=").concat(this._sessionTimers.refresher?"uac":"uas")),i?(n.push("Content-Type: application/sdp"),this._connectionPromiseQueue=this._connectionPromiseQueue.then(function(){return e._createLocalDescription("offer",s)}).then(function(t){var r={originator:"local",type:"offer",sdp:t=e._mangleOffer(t)};w.debug('emit "sdp"'),e.emit("sdp",r),e.sendRequest(_.UPDATE,{extraHeaders:n,body:t,eventHandlers:{onSuccessResponse:function(t){l.call(e,t),o=!0},onErrorResponse:function(t){u.call(e,t)},onTransportError:function(){e.onTransportError()},onRequestTimeout:function(){e.onRequestTimeout()},onDialogError:function(){e.onDialogError()}}})}).catch(function(){u.call(e)})):this.sendRequest(_.UPDATE,{extraHeaders:n,eventHandlers:{onSuccessResponse:function(t){l.call(e,t)},onErrorResponse:function(t){u.call(e,t)},onTransportError:function(){e.onTransportError()},onRequestTimeout:function(){e.onRequestTimeout()},onDialogError:function(){e.onDialogError()}}})}},{key:"_acceptAndTerminate",value:function(e,t,n){w.debug("acceptAndTerminate()");var r=[];t&&(n=n||_.REASON_PHRASE[t]||"",r.push("Reason: SIP ;cause=".concat(t,'; text="').concat(n,'"'))),(this._dialog||this._createDialog(e,"UAC"))&&(this.sendRequest(_.ACK),this.sendRequest(_.BYE,{extraHeaders:r})),this._status=I.STATUS_TERMINATED}},{key:"_mangleOffer",value:function(e){if(!this._localHold&&!this._remoteHold)return e;if(e=d.parse(e),this._localHold&&!this._remoteHold){w.debug("mangleOffer() | me on hold, mangling offer");var t,n=s(e.media);try{for(n.s();!(t=n.n()).done;){var r=t.value;-1!==O.indexOf(r.type)&&(r.direction?"sendrecv"===r.direction?r.direction="sendonly":"recvonly"===r.direction&&(r.direction="inactive"):r.direction="sendonly")}}catch(e){n.e(e)}finally{n.f()}}else if(this._localHold&&this._remoteHold){w.debug("mangleOffer() | both on hold, mangling offer");var i,o=s(e.media);try{for(o.s();!(i=o.n()).done;){var l=i.value;-1!==O.indexOf(l.type)&&(l.direction="inactive")}}catch(e){o.e(e)}finally{o.f()}}else if(this._remoteHold){w.debug("mangleOffer() | remote on hold, mangling offer");var u,a=s(e.media);try{for(a.s();!(u=a.n()).done;){var c=u.value;-1!==O.indexOf(c.type)&&(c.direction?"sendrecv"===c.direction?c.direction="recvonly":"recvonly"===c.direction&&(c.direction="inactive"):c.direction="recvonly")}}catch(e){a.e(e)}finally{a.f()}}return d.write(e)}},{key:"_setLocalMediaStatus",value:function(){var e=!0,t=!0;(this._localHold||this._remoteHold)&&(e=!1,t=!1),this._audioMuted&&(e=!1),this._videoMuted&&(t=!1),this._toggleMuteAudio(!e),this._toggleMuteVideo(!t)}},{key:"_handleSessionTimersInIncomingRequest",value:function(e,t){var n;this._sessionTimers.enabled&&(e.session_expires&&e.session_expires>=_.MIN_SESSION_EXPIRES?(this._sessionTimers.currentExpires=e.session_expires,n=e.session_expires_refresher||"uas"):(this._sessionTimers.currentExpires=this._sessionTimers.defaultExpires,n="uas"),t.push("Session-Expires: ".concat(this._sessionTimers.currentExpires,";refresher=").concat(n)),this._sessionTimers.refresher="uas"===n,this._runSessionTimer())}},{key:"_handleSessionTimersInIncomingResponse",value:function(e){var t;this._sessionTimers.enabled&&(e.session_expires&&e.session_expires>=_.MIN_SESSION_EXPIRES?(this._sessionTimers.currentExpires=e.session_expires,t=e.session_expires_refresher||"uac"):(this._sessionTimers.currentExpires=this._sessionTimers.defaultExpires,t="uac"),this._sessionTimers.refresher="uac"===t,this._runSessionTimer())}},{key:"_runSessionTimer",value:function(){var e=this,t=this._sessionTimers.currentExpires;this._sessionTimers.running=!0,clearTimeout(this._sessionTimers.timer),this._sessionTimers.refresher?this._sessionTimers.timer=setTimeout(function(){e._status!==I.STATUS_TERMINATED&&e._isReadyToReOffer()&&(w.debug("runSessionTimer() | sending session refresh request"),e._sessionTimers.refreshMethod===_.UPDATE?e._sendUpdate():e._sendReinvite())},500*t):this._sessionTimers.timer=setTimeout(function(){e._status!==I.STATUS_TERMINATED&&(w.warn("runSessionTimer() | timer expired, terminating the session"),e.terminate({cause:_.causes.REQUEST_TIMEOUT,status_code:408,reason_phrase:"Session Timer Expired"}))},1100*t)}},{key:"_toggleMuteAudio",value:function(e){var t,n=s(this._connection.getSenders().filter(function(e){return e.track&&"audio"===e.track.kind}));try{for(n.s();!(t=n.n()).done;){t.value.track.enabled=!e}}catch(e){n.e(e)}finally{n.f()}}},{key:"_toggleMuteVideo",value:function(e){var t,n=s(this._connection.getSenders().filter(function(e){return e.track&&"video"===e.track.kind}));try{for(n.s();!(t=n.n()).done;){t.value.track.enabled=!e}}catch(e){n.e(e)}finally{n.f()}}},{key:"_newRTCSession",value:function(e,t){w.debug("newRTCSession()"),this._ua.newRTCSession(this,{originator:e,session:this,request:t})}},{key:"_connecting",value:function(e){w.debug("session connecting"),w.debug('emit "connecting"'),this.emit("connecting",{request:e})}},{key:"_progress",value:function(e,t){w.debug("session progress"),w.debug('emit "progress"'),this.emit("progress",{originator:e,response:t||null})}},{key:"_accepted",value:function(e,t){w.debug("session accepted"),this._start_time=new Date,w.debug('emit "accepted"'),this.emit("accepted",{originator:e,response:t||null})}},{key:"_confirmed",value:function(e,t){w.debug("session confirmed"),this._is_confirmed=!0,w.debug('emit "confirmed"'),this.emit("confirmed",{originator:e,ack:t||null})}},{key:"_ended",value:function(e,t,n){w.debug("session ended"),this._end_time=new Date,this._close(),w.debug('emit "ended"'),this.emit("ended",{originator:e,message:t||null,cause:n})}},{key:"_failed",value:function(e,t,n){w.debug("session failed"),w.debug('emit "_failed"'),this.emit("_failed",{originator:e,message:t||null,cause:n}),this._close(),w.debug('emit "failed"'),this.emit("failed",{originator:e,message:t||null,cause:n})}},{key:"_onhold",value:function(e){w.debug("session onhold"),this._setLocalMediaStatus(),w.debug('emit "hold"'),this.emit("hold",{originator:e})}},{key:"_onunhold",value:function(e){w.debug("session onunhold"),this._setLocalMediaStatus(),w.debug('emit "unhold"'),this.emit("unhold",{originator:e})}},{key:"_onmute",value:function(e){var t=e.audio,n=e.video;w.debug("session onmute"),this._setLocalMediaStatus(),w.debug('emit "muted"'),this.emit("muted",{audio:t,video:n})}},{key:"_onunmute",value:function(e){var t=e.audio,n=e.video;w.debug("session onunmute"),this._setLocalMediaStatus(),w.debug('emit "unmuted"'),this.emit("unmuted",{audio:t,video:n})}},{key:"C",get:function(){return I}},{key:"causes",get:function(){return _.causes}},{key:"id",get:function(){return this._id}},{key:"connection",get:function(){return this._connection}},{key:"contact",get:function(){return this._contact}},{key:"direction",get:function(){return this._direction}},{key:"local_identity",get:function(){return this._local_identity}},{key:"remote_identity",get:function(){return this._remote_identity}},{key:"start_time",get:function(){return this._start_time}},{key:"end_time",get:function(){return this._end_time}},{key:"data",get:function(){return this._data},set:function(e){this._data=e}},{key:"status",get:function(){return this._status}}]),n}()},{"./Constants":2,"./Dialog":3,"./Exceptions":6,"./Logger":9,"./RTCSession/DTMF":15,"./RTCSession/Info":16,"./RTCSession/ReferNotifier":17,"./RTCSession/ReferSubscriber":18,"./RequestSender":20,"./SIPMessage":21,"./Timers":23,"./Transactions":24,"./URI":27,"./Utils":28,events:31,"sdp-transform":37}],15:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var u=e("events").EventEmitter,a=e("../Logger"),c=e("../Constants"),h=e("../Exceptions"),d=e("../Utils"),f=new a("RTCSession:DTMF"),_={MIN_DURATION:70,MAX_DURATION:6e3,DEFAULT_DURATION:100,MIN_INTER_TONE_GAP:50,DEFAULT_INTER_TONE_GAP:500};t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(a,u);var t,n,r,l=o(a);function a(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,a),(t=l.call(this))._session=e,t._direction=null,t._tone=null,t._duration=null,t._request=null,t}return t=a,(n=[{key:"send",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};if(void 0===e)throw new TypeError("Not enough arguments");if(this._direction="outgoing",this._session.status!==this._session.C.STATUS_CONFIRMED&&this._session.status!==this._session.C.STATUS_WAITING_FOR_ACK)throw new h.InvalidStateError(this._session.status);var r=d.cloneArray(n.extraHeaders);if(this.eventHandlers=d.cloneObject(n.eventHandlers),"string"==typeof e)e=e.toUpperCase();else{if("number"!=typeof e)throw new TypeError("Invalid tone: ".concat(e));e=e.toString()}if(!e.match(/^[0-9A-DR#*]$/))throw new TypeError("Invalid tone: ".concat(e));this._tone=e,this._duration=n.duration,r.push("Content-Type: application/dtmf-relay");var s="Signal=".concat(this._tone,"\r\n");s+="Duration=".concat(this._duration),this._session.newDTMF({originator:"local",dtmf:this,request:this._request}),this._session.sendRequest(c.INFO,{extraHeaders:r,eventHandlers:{onSuccessResponse:function(e){t.emit("succeeded",{originator:"remote",response:e})},onErrorResponse:function(e){t.eventHandlers.onFailed&&t.eventHandlers.onFailed(),t.emit("failed",{originator:"remote",response:e})},onRequestTimeout:function(){t._session.onRequestTimeout()},onTransportError:function(){t._session.onTransportError()},onDialogError:function(){t._session.onDialogError()}},body:s})}},{key:"init_incoming",value:function(e){var t=/^(Signal\s*?=\s*?)([0-9A-D#*]{1})(\s)?.*/,n=/^(Duration\s?=\s?)([0-9]{1,4})(\s)?.*/;if(this._direction="incoming",this._request=e,e.reply(200),e.body){var r=e.body.split("\n");r.length>=1&&t.test(r[0])&&(this._tone=r[0].replace(t,"$2")),r.length>=2&&n.test(r[1])&&(this._duration=parseInt(r[1].replace(n,"$2"),10))}this._duration||(this._duration=_.DEFAULT_DURATION),this._tone?this._session.newDTMF({originator:"remote",dtmf:this,request:e}):f.debug("invalid INFO DTMF received, discarded")}},{key:"tone",get:function(){return this._tone}},{key:"duration",get:function(){return this._duration}}])&&s(t.prototype,n),r&&s(t,r),a}(),t.exports.C=_},{"../Constants":2,"../Exceptions":6,"../Logger":9,"../Utils":28,events:31}],16:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in 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u=e("events").EventEmitter,a=e("../Constants"),c=e("../Exceptions"),h=e("../Utils");t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(d,u);var t,n,r,l=o(d);function d(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,d),(t=l.call(this))._session=e,t._direction=null,t._contentType=null,t._body=null,t}return t=d,(n=[{key:"send",value:function(e,t){var n=this,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(this._direction="outgoing",void 0===e)throw new TypeError("Not enough arguments");if(this._session.status!==this._session.C.STATUS_CONFIRMED&&this._session.status!==this._session.C.STATUS_WAITING_FOR_ACK)throw new c.InvalidStateError(this._session.status);this._contentType=e,this._body=t;var s=h.cloneArray(r.extraHeaders);s.push("Content-Type: ".concat(e)),this._session.newInfo({originator:"local",info:this,request:this.request}),this._session.sendRequest(a.INFO,{extraHeaders:s,eventHandlers:{onSuccessResponse:function(e){n.emit("succeeded",{originator:"remote",response:e})},onErrorResponse:function(e){n.emit("failed",{originator:"remote",response:e})},onTransportError:function(){n._session.onTransportError()},onRequestTimeout:function(){n._session.onRequestTimeout()},onDialogError:function(){n._session.onDialogError()}},body:t})}},{key:"init_incoming",value:function(e){this._direction="incoming",this.request=e,e.reply(200),this._contentType=e.hasHeader("Content-Type")?e.getHeader("Content-Type").toLowerCase():void 0,this._body=e.body,this._session.newInfo({originator:"remote",info:this,request:e})}},{key:"contentType",get:function(){return this._contentType}},{key:"body",get:function(){return this._body}}])&&s(t.prototype,n),r&&s(t,r),d}()},{"../Constants":2,"../Exceptions":6,"../Utils":28,events:31}],17:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("../Logger"),i=e("../Constants"),o=new s("RTCSession:ReferNotifier"),l={event_type:"refer",body_type:"message/sipfrag;version=2.0",expires:300};t.exports=function(){function e(t,n,r){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._session=t,this._id=n,this._expires=r||l.expires,this._active=!0,this.notify(100)}var t,n,s;return t=e,(n=[{key:"notify",value:function(e,t){var n;(o.debug("notify()"),!1!==this._active)&&(t=t||i.REASON_PHRASE[e]||"",n=e>=200?"terminated;reason=noresource":"active;expires=".concat(this._expires),this._session.sendRequest(i.NOTIFY,{extraHeaders:["Event: ".concat(l.event_type,";id=").concat(this._id),"Subscription-State: ".concat(n),"Content-Type: ".concat(l.body_type)],body:"SIP/2.0 ".concat(e," ").concat(t),eventHandlers:{onErrorResponse:function(){this._active=!1}}}))}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"../Constants":2,"../Logger":9}],18:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var u=e("events").EventEmitter,a=e("../Logger"),c=e("../Constants"),h=e("../Grammar"),d=e("../Utils"),f=new a("RTCSession:ReferSubscriber");t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}(a,u);var t,n,r,l=o(a);function a(e){var t;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,a),(t=l.call(this))._id=null,t._session=e,t}return t=a,(n=[{key:"sendRefer",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};f.debug("sendRefer()");var r=d.cloneArray(n.extraHeaders),s=d.cloneObject(n.eventHandlers);for(var i in s)Object.prototype.hasOwnProperty.call(s,i)&&this.on(i,s[i]);var o=null;n.replaces&&(o=n.replaces._request.call_id,o+=";to-tag=".concat(n.replaces._to_tag),o+=";from-tag=".concat(n.replaces._from_tag),o=encodeURIComponent(o));var l="Refer-To: <".concat(e).concat(o?"?Replaces=".concat(o):"",">");if(r.push(l),!r.some(function(e){return e.toLowerCase().startsWith("referred-by:")})){var u="Referred-By: <".concat(this._session._ua._configuration.uri._scheme,":").concat(this._session._ua._configuration.uri._user,"@").concat(this._session._ua._configuration.uri._host,">");r.push(u)}r.push("Contact: ".concat(this._session.contact));var a=this._session.sendRequest(c.REFER,{extraHeaders:r,eventHandlers:{onSuccessResponse:function(e){t._requestSucceeded(e)},onErrorResponse:function(e){t._requestFailed(e,c.causes.REJECTED)},onTransportError:function(){t._requestFailed(null,c.causes.CONNECTION_ERROR)},onRequestTimeout:function(){t._requestFailed(null,c.causes.REQUEST_TIMEOUT)},onDialogError:function(){t._requestFailed(null,c.causes.DIALOG_ERROR)}}});this._id=a.cseq}},{key:"receiveNotify",value:function(e){if(f.debug("receiveNotify()"),e.body){var t=h.parse(e.body.trim().split("\r\n",1)[0],"Status_Line");if(-1!==t)switch(!0){case/^100$/.test(t.status_code):this.emit("trying",{request:e,status_line:t});break;case/^1[0-9]{2}$/.test(t.status_code):this.emit("progress",{request:e,status_line:t});break;case/^2[0-9]{2}$/.test(t.status_code):this.emit("accepted",{request:e,status_line:t});break;default:this.emit("failed",{request:e,status_line:t})}else f.debug('receiveNotify() | error parsing NOTIFY body: "'.concat(e.body,'"'))}}},{key:"_requestSucceeded",value:function(e){f.debug("REFER succeeded"),f.debug('emit "requestSucceeded"'),this.emit("requestSucceeded",{response:e})}},{key:"_requestFailed",value:function(e,t){f.debug("REFER failed"),f.debug('emit "requestFailed"'),this.emit("requestFailed",{response:e||null,cause:t})}},{key:"id",get:function(){return this._id}}])&&s(t.prototype,n),r&&s(t,r),a}()},{"../Constants":2,"../Grammar":7,"../Logger":9,"../Utils":28,events:31}],19:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("./Logger"),i=e("./Utils"),o=e("./Constants"),l=e("./SIPMessage"),u=e("./RequestSender"),a=new s("Registrator");t.exports=function(){function e(t,n){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._reg_id=1,this._ua=t,this._transport=n,this._registrar=t.configuration.registrar_server,this._expires=t.configuration.register_expires,this._call_id=i.createRandomToken(22),this._cseq=0,this._to_uri=t.configuration.uri,this._registrationTimer=null,this._registering=!1,this._registered=!1,this._contact=this._ua.contact.toString(),this._contact+=";+sip.ice",this._extraHeaders=[],this._extraContactParams="",this._sipInstance='"<urn:uuid:'.concat(this._ua.configuration.instance_id,'>"'),this._contact+=";reg-id=".concat(this._reg_id),this._contact+=";+sip.instance=".concat(this._sipInstance)}var t,n,s;return t=e,(n=[{key:"setExtraHeaders",value:function(e){Array.isArray(e)||(e=[]),this._extraHeaders=e.slice()}},{key:"setExtraContactParams",value:function(e){for(var t in e instanceof Object||(e={}),this._extraContactParams="",e)if(Object.prototype.hasOwnProperty.call(e,t)){var n=e[t];this._extraContactParams+=";".concat(t),n&&(this._extraContactParams+="=".concat(n))}}},{key:"register",value:function(){var e=this;if(this._registering)a.debug("Register request in progress...");else{var t=this._extraHeaders.slice();t.push("Contact: ".concat(this._contact,";expires=").concat(this._expires).concat(this._extraContactParams)),t.push("Expires: ".concat(this._expires));var n=new l.OutgoingRequest(o.REGISTER,this._registrar,this._ua,{to_uri:this._to_uri,call_id:this._call_id,cseq:this._cseq+=1},t),r=new u(this._ua,n,{onRequestTimeout:function(){e._registrationFailure(null,o.causes.REQUEST_TIMEOUT)},onTransportError:function(){e._registrationFailure(null,o.causes.CONNECTION_ERROR)},onAuthenticated:function(){e._cseq+=1},onReceiveResponse:function(t){if(t.cseq===e._cseq)switch(null!==e._registrationTimer&&(clearTimeout(e._registrationTimer),e._registrationTimer=null),!0){case/^1[0-9]{2}$/.test(t.status_code):break;case/^2[0-9]{2}$/.test(t.status_code):if(e._registering=!1,!t.hasHeader("Contact")){a.debug("no Contact header in response to REGISTER, response ignored");break}var n=t.headers.Contact.reduce(function(e,t){return e.concat(t.parsed)},[]),r=n.find(function(t){return e._sipInstance===t.getParam("+sip.instance")&&e._reg_id===parseInt(t.getParam("reg-id"))});if(r||(r=n.find(function(t){return t.uri.user===e._ua.contact.uri.user})),!r){a.debug("no Contact header pointing to us, response ignored");break}var s=r.getParam("expires");!s&&t.hasHeader("expires")&&(s=t.getHeader("expires")),s||(s=e._expires),(s=Number(s))<10&&(s=10);var l=s>64?1e3*s/2+Math.floor(1e3*(s/2-32)*Math.random()):1e3*s-5e3;e._registrationTimer=setTimeout(function(){e._registrationTimer=null,0===e._ua.listeners("registrationExpiring").length?e.register():e._ua.emit("registrationExpiring")},l),r.hasParam("temp-gruu")&&(e._ua.contact.temp_gruu=r.getParam("temp-gruu").replace(/"/g,"")),r.hasParam("pub-gruu")&&(e._ua.contact.pub_gruu=r.getParam("pub-gruu").replace(/"/g,"")),e._registered||(e._registered=!0,e._ua.registered({response:t}));break;case/^423$/.test(t.status_code):t.hasHeader("min-expires")?(e._expires=Number(t.getHeader("min-expires")),e._expires<10&&(e._expires=10),e.register()):(a.debug("423 response received for REGISTER without Min-Expires"),e._registrationFailure(t,o.causes.SIP_FAILURE_CODE));break;default:var u=i.sipErrorCause(t.status_code);e._registrationFailure(t,u)}}});this._registering=!0,r.send()}}},{key:"unregister",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};if(this._registered){this._registered=!1,null!==this._registrationTimer&&(clearTimeout(this._registrationTimer),this._registrationTimer=null);var n=this._extraHeaders.slice();t.all?n.push("Contact: *".concat(this._extraContactParams)):n.push("Contact: ".concat(this._contact,";expires=0").concat(this._extraContactParams)),n.push("Expires: 0");var r=new l.OutgoingRequest(o.REGISTER,this._registrar,this._ua,{to_uri:this._to_uri,call_id:this._call_id,cseq:this._cseq+=1},n);new u(this._ua,r,{onRequestTimeout:function(){e._unregistered(null,o.causes.REQUEST_TIMEOUT)},onTransportError:function(){e._unregistered(null,o.causes.CONNECTION_ERROR)},onAuthenticated:function(){e._cseq+=1},onReceiveResponse:function(t){switch(!0){case/^1[0-9]{2}$/.test(t.status_code):break;case/^2[0-9]{2}$/.test(t.status_code):e._unregistered(t);break;default:var n=i.sipErrorCause(t.status_code);e._unregistered(t,n)}}}).send()}else a.debug("already unregistered")}},{key:"close",value:function(){this._registered&&this.unregister()}},{key:"onTransportClosed",value:function(){this._registering=!1,null!==this._registrationTimer&&(clearTimeout(this._registrationTimer),this._registrationTimer=null),this._registered&&(this._registered=!1,this._ua.unregistered({}))}},{key:"_registrationFailure",value:function(e,t){this._registering=!1,this._ua.registrationFailed({response:e||null,cause:t}),this._registered&&(this._registered=!1,this._ua.unregistered({response:e||null,cause:t}))}},{key:"_unregistered",value:function(e,t){this._registering=!1,this._registered=!1,this._ua.unregistered({response:e||null,cause:t||null})}},{key:"registered",get:function(){return this._registered}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"./Constants":2,"./Logger":9,"./RequestSender":20,"./SIPMessage":21,"./Utils":28}],20:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("./Logger"),i=e("./Constants"),o=e("./DigestAuthentication"),l=e("./Transactions"),u=new s("RequestSender"),a={onRequestTimeout:function(){},onTransportError:function(){},onReceiveResponse:function(){},onAuthenticated:function(){}};t.exports=function(){function e(t,n,r){for(var s in function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this._ua=t,this._eventHandlers=r,this._method=n.method,this._request=n,this._auth=null,this._challenged=!1,this._staled=!1,a)Object.prototype.hasOwnProperty.call(a,s)&&(this._eventHandlers[s]||(this._eventHandlers[s]=a[s]));t.status!==t.C.STATUS_USER_CLOSED||this._method===i.BYE&&this._method===i.ACK||this._eventHandlers.onTransportError()}var t,n,s;return t=e,(n=[{key:"send",value:function(){var e=this,t={onRequestTimeout:function(){e._eventHandlers.onRequestTimeout()},onTransportError:function(){e._eventHandlers.onTransportError()},onReceiveResponse:function(t){e._receiveResponse(t)}};switch(this._method){case"INVITE":this.clientTransaction=new l.InviteClientTransaction(this._ua,this._ua.transport,this._request,t);break;case"ACK":this.clientTransaction=new l.AckClientTransaction(this._ua,this._ua.transport,this._request,t);break;default:this.clientTransaction=new l.NonInviteClientTransaction(this._ua,this._ua.transport,this._request,t)}this._ua._configuration.authorization_jwt&&this._request.setHeader("Authorization",this._ua._configuration.authorization_jwt),this.clientTransaction.send()}},{key:"_receiveResponse",value:function(e){var t,n,r=e.status_code;if(401!==r&&407!==r||null===this._ua.configuration.password&&null===this._ua.configuration.ha1)this._eventHandlers.onReceiveResponse(e);else{if(401===e.status_code?(t=e.parseHeader("www-authenticate"),n="authorization"):(t=e.parseHeader("proxy-authenticate"),n="proxy-authorization"),!t)return u.debug("".concat(e.status_code," with wrong or missing challenge, cannot authenticate")),void this._eventHandlers.onReceiveResponse(e);if(!this._challenged||!this._staled&&!0===t.stale){if(this._auth||(this._auth=new o({username:this._ua.configuration.authorization_user,password:this._ua.configuration.password,realm:this._ua.configuration.realm,ha1:this._ua.configuration.ha1})),!this._auth.authenticate(this._request,t))return void this._eventHandlers.onReceiveResponse(e);this._challenged=!0,this._ua.set("realm",this._auth.get("realm")),this._ua.set("ha1",this._auth.get("ha1")),t.stale&&(this._staled=!0),this._request=this._request.clone(),this._request.cseq+=1,this._request.setHeader("cseq","".concat(this._request.cseq," ").concat(this._method)),this._request.setHeader(n,this._auth.toString()),this._eventHandlers.onAuthenticated(this._request),this.send()}else this._eventHandlers.onReceiveResponse(e)}}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"./Constants":2,"./DigestAuthentication":5,"./Logger":9,"./Transactions":24}],21:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&i(e,t)}function i(e,t){return(i=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function o(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=l(e);if(t){var i=l(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,n)}}function l(e){return(l=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}function u(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return a(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return a(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,s=function(){};return{s:s,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:s}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var i,o=!0,l=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return o=e.done,e},e:function(e){l=!0,i=e},f:function(){try{o||null==n.return||n.return()}finally{if(l)throw i}}}}function a(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}function c(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function h(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function d(e,t,n){return t&&h(e.prototype,t),n&&h(e,n),e}var f=e("sdp-transform"),_=e("./Logger"),p=e("./Constants"),m=e("./Utils"),v=e("./NameAddrHeader"),g=e("./Grammar"),y=new _("SIPMessage"),T=function(){function e(t,n,r,s,i,o){if(c(this,e),!t||!n||!r)return null;s=s||{},this.ua=r,this.headers={},this.method=t,this.ruri=n,this.body=o,this.extraHeaders=m.cloneArray(i),this.ua.configuration.extra_headers&&(this.extraHeaders=this.extraHeaders.concat(this.ua.configuration.extra_headers)),s.route_set?this.setHeader("route",s.route_set):r.configuration.use_preloaded_route&&this.setHeader("route","<".concat(r.transport.sip_uri,";lr>")),this.setHeader("via",""),this.setHeader("max-forwards",p.MAX_FORWARDS);var l=s.to_uri||n,u=s.to_tag?{tag:s.to_tag}:null,a=void 0!==s.to_display_name?s.to_display_name:null;this.to=new v(l,a,u),this.setHeader("to",this.to.toString());var h,d=s.from_uri||r.configuration.uri,f={tag:s.from_tag||m.newTag()};h=void 0!==s.from_display_name?s.from_display_name:r.configuration.display_name?r.configuration.display_name:null,this.from=new v(d,h,f),this.setHeader("from",this.from.toString());var _=s.call_id||r.configuration.jssip_id+m.createRandomToken(15);this.call_id=_,this.setHeader("call-id",_);var g=s.cseq||Math.floor(1e4*Math.random());this.cseq=g,this.setHeader("cseq","".concat(g," ").concat(t))}return d(e,[{key:"setHeader",value:function(e,t){for(var n=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),r=0;r<this.extraHeaders.length;r++)n.test(this.extraHeaders[r])&&this.extraHeaders.splice(r,1);this.headers[m.headerize(e)]=Array.isArray(t)?t:[t]}},{key:"getHeader",value:function(e){var t=this.headers[m.headerize(e)];if(t){if(t[0])return t[0]}else{var n,r=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),s=u(this.extraHeaders);try{for(s.s();!(n=s.n()).done;){var i=n.value;if(r.test(i))return i.substring(i.indexOf(":")+1).trim()}}catch(e){s.e(e)}finally{s.f()}}}},{key:"getHeaders",value:function(e){var t=this.headers[m.headerize(e)],n=[];if(t){var r,s=u(t);try{for(s.s();!(r=s.n()).done;){var i=r.value;n.push(i)}}catch(e){s.e(e)}finally{s.f()}return n}var o,l=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),a=u(this.extraHeaders);try{for(a.s();!(o=a.n()).done;){var c=o.value;l.test(c)&&n.push(c.substring(c.indexOf(":")+1).trim())}}catch(e){a.e(e)}finally{a.f()}return n}},{key:"hasHeader",value:function(e){if(this.headers[m.headerize(e)])return!0;var t,n=new RegExp("^\\s*".concat(e,"\\s*:"),"i"),r=u(this.extraHeaders);try{for(r.s();!(t=r.n()).done;){var s=t.value;if(n.test(s))return!0}}catch(e){r.e(e)}finally{r.f()}return!1}},{key:"parseSDP",value:function(e){return!e&&this.sdp?this.sdp:(this.sdp=f.parse(this.body||""),this.sdp)}},{key:"toString",value:function(){var e="".concat(this.method," ").concat(this.ruri," SIP/2.0\r\n");for(var t in this.headers)if(Object.prototype.hasOwnProperty.call(this.headers,t)){var n,r=u(this.headers[t]);try{for(r.s();!(n=r.n()).done;){var s=n.value;e+="".concat(t,": ").concat(s,"\r\n")}}catch(e){r.e(e)}finally{r.f()}}var i,o=u(this.extraHeaders);try{for(o.s();!(i=o.n()).done;){var l=i.value;e+="".concat(l.trim(),"\r\n")}}catch(e){o.e(e)}finally{o.f()}var a=[];switch(this.method){case p.REGISTER:a.push("path","gruu");break;case p.INVITE:this.ua.configuration.session_timers&&a.push("timer"),(this.ua.contact.pub_gruu||this.ua.contact.temp_gruu)&&a.push("gruu"),a.push("ice","replaces");break;case p.UPDATE:this.ua.configuration.session_timers&&a.push("timer"),a.push("ice")}a.push("outbound");var c=this.ua.configuration.user_agent||p.USER_AGENT;if(e+="Allow: ".concat(p.ALLOWED_METHODS,"\r\n"),e+="Supported: ".concat(a,"\r\n"),e+="User-Agent: ".concat(c,"\r\n"),this.body){var h=m.str_utf8_length(this.body);e+="Content-Length: ".concat(h,"\r\n\r\n"),e+=this.body}else e+="Content-Length: 0\r\n\r\n";return e}},{key:"clone",value:function(){var t=new e(this.method,this.ruri,this.ua);return Object.keys(this.headers).forEach(function(e){t.headers[e]=this.headers[e].slice()},this),t.body=this.body,t.extraHeaders=m.cloneArray(this.extraHeaders),t.to=this.to,t.from=this.from,t.call_id=this.call_id,t.cseq=this.cseq,t}}]),e}(),C=function(e){s(n,T);var t=o(n);function n(e,r,s,i,o){var l;return c(this,n),(l=t.call(this,p.INVITE,e,r,s,i,o)).transaction=null,l}return d(n,[{key:"cancel",value:function(e){this.transaction.cancel(e)}},{key:"clone",value:function(){var e=new n(this.ruri,this.ua);return Object.keys(this.headers).forEach(function(t){e.headers[t]=this.headers[t].slice()},this),e.body=this.body,e.extraHeaders=m.cloneArray(this.extraHeaders),e.to=this.to,e.from=this.from,e.call_id=this.call_id,e.cseq=this.cseq,e.transaction=this.transaction,e}}]),n}(),b=function(){function e(){c(this,e),this.data=null,this.headers=null,this.method=null,this.via=null,this.via_branch=null,this.call_id=null,this.cseq=null,this.from=null,this.from_tag=null,this.to=null,this.to_tag=null,this.body=null,this.sdp=null}return d(e,[{key:"addHeader",value:function(e,t){var n={raw:t};e=m.headerize(e),this.headers[e]?this.headers[e].push(n):this.headers[e]=[n]}},{key:"getHeader",value:function(e){var t=this.headers[m.headerize(e)];if(t)return t[0]?t[0].raw:void 0}},{key:"getHeaders",value:function(e){var t=this.headers[m.headerize(e)],n=[];if(!t)return[];var r,s=u(t);try{for(s.s();!(r=s.n()).done;){var i=r.value;n.push(i.raw)}}catch(e){s.e(e)}finally{s.f()}return n}},{key:"hasHeader",value:function(e){return!!this.headers[m.headerize(e)]}},{key:"parseHeader",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0;if(e=m.headerize(e),this.headers[e]){if(!(t>=this.headers[e].length)){var n=this.headers[e][t],r=n.raw;if(n.parsed)return n.parsed;var s=g.parse(r,e.replace(/-/g,"_"));return-1===s?(this.headers[e].splice(t,1),void y.debug('error parsing "'.concat(e,'" header field with value "').concat(r,'"'))):(n.parsed=s,s)}y.debug('not so many "'.concat(e,'" headers present'))}else y.debug('header "'.concat(e,'" not present'))}},{key:"s",value:function(e,t){return this.parseHeader(e,t)}},{key:"setHeader",value:function(e,t){var n={raw:t};this.headers[m.headerize(e)]=[n]}},{key:"parseSDP",value:function(e){return!e&&this.sdp?this.sdp:(this.sdp=f.parse(this.body||""),this.sdp)}},{key:"toString",value:function(){return this.data}}]),e}(),S=function(e){s(n,b);var t=o(n);function n(e){var r;return c(this,n),(r=t.call(this)).ua=e,r.headers={},r.ruri=null,r.transport=null,r.server_transaction=null,r}return d(n,[{key:"reply",value:function(e,t,n,r,s,i){var o=[],l=this.getHeader("To");if(t=t||null,!(e=e||null)||e<100||e>699)throw new TypeError("Invalid status_code: ".concat(e));if(t&&"string"!=typeof t&&!(t instanceof String))throw new TypeError("Invalid reason_phrase: ".concat(t));t=t||p.REASON_PHRASE[e]||"",n=m.cloneArray(n),this.ua.configuration.extra_headers&&(n=n.concat(this.ua.configuration.extra_headers));var a="SIP/2.0 ".concat(e," ").concat(t,"\r\n");if(this.method===p.INVITE&&e>100&&e<=200){var c,h=u(this.getHeaders("record-route"));try{for(h.s();!(c=h.n()).done;){var d=c.value;a+="Record-Route: ".concat(d,"\r\n")}}catch(e){h.e(e)}finally{h.f()}}var f,_=u(this.getHeaders("via"));try{for(_.s();!(f=_.n()).done;){var v=f.value;a+="Via: ".concat(v,"\r\n")}}catch(e){_.e(e)}finally{_.f()}!this.to_tag&&e>100?l+=";tag=".concat(m.newTag()):this.to_tag&&!this.s("to").hasParam("tag")&&(l+=";tag=".concat(this.to_tag)),a+="To: ".concat(l,"\r\n"),a+="From: ".concat(this.getHeader("From"),"\r\n"),a+="Call-ID: ".concat(this.call_id,"\r\n"),a+="CSeq: ".concat(this.cseq," ").concat(this.method,"\r\n");var g,y=u(n);try{for(y.s();!(g=y.n()).done;){var T=g.value;a+="".concat(T.trim(),"\r\n")}}catch(e){y.e(e)}finally{y.f()}switch(this.method){case p.INVITE:this.ua.configuration.session_timers&&o.push("timer"),(this.ua.contact.pub_gruu||this.ua.contact.temp_gruu)&&o.push("gruu"),o.push("ice","replaces");break;case p.UPDATE:this.ua.configuration.session_timers&&o.push("timer"),r&&o.push("ice"),o.push("replaces")}if(o.push("outbound"),this.method===p.OPTIONS?(a+="Allow: ".concat(p.ALLOWED_METHODS,"\r\n"),a+="Accept: ".concat(p.ACCEPTED_BODY_TYPES,"\r\n")):405===e?a+="Allow: ".concat(p.ALLOWED_METHODS,"\r\n"):415===e&&(a+="Accept: ".concat(p.ACCEPTED_BODY_TYPES,"\r\n")),a+="Supported: ".concat(o,"\r\n"),r){var C=m.str_utf8_length(r);a+="Content-Type: application/sdp\r\n",a+="Content-Length: ".concat(C,"\r\n\r\n"),a+=r}else a+="Content-Length: ".concat(0,"\r\n\r\n");this.server_transaction.receiveResponse(e,a,s,i)}},{key:"reply_sl",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,n=this.getHeaders("via");if(!e||e<100||e>699)throw new TypeError("Invalid status_code: ".concat(e));if(t&&"string"!=typeof t&&!(t instanceof String))throw new TypeError("Invalid reason_phrase: ".concat(t));t=t||p.REASON_PHRASE[e]||"";var r,s="SIP/2.0 ".concat(e," ").concat(t,"\r\n"),i=u(n);try{for(i.s();!(r=i.n()).done;){var o=r.value;s+="Via: ".concat(o,"\r\n")}}catch(e){i.e(e)}finally{i.f()}var l=this.getHeader("To");if(!this.to_tag&&e>100?l+=";tag=".concat(m.newTag()):this.to_tag&&!this.s("to").hasParam("tag")&&(l+=";tag=".concat(this.to_tag)),s+="To: ".concat(l,"\r\n"),s+="From: ".concat(this.getHeader("From"),"\r\n"),s+="Call-ID: ".concat(this.call_id,"\r\n"),s+="CSeq: ".concat(this.cseq," ").concat(this.method,"\r\n"),this.ua.configuration.extra_headers){var a,c=u(this.ua.configuration.extra_headers);try{for(c.s();!(a=c.n()).done;){var h=a.value;s+="".concat(h.trim(),"\r\n")}}catch(e){c.e(e)}finally{c.f()}}s+="Content-Length: ".concat(0,"\r\n\r\n"),this.transport.send(s)}}]),n}(),E=function(e){s(n,b);var t=o(n);function n(){var e;return c(this,n),(e=t.call(this)).headers={},e.status_code=null,e.reason_phrase=null,e}return n}();t.exports={OutgoingRequest:T,InitialOutgoingInviteRequest:C,IncomingRequest:S,IncomingResponse:E}},{"./Constants":2,"./Grammar":7,"./Logger":9,"./NameAddrHeader":11,"./Utils":28,"sdp-transform":37}],22:[function(e,t,n){"use strict";var r=e("./Logger"),s=e("./Utils"),i=e("./Grammar"),o=new r("Socket");n.isSocket=function(e){if(Array.isArray(e))return!1;if(void 0===e)return o.warn("undefined JsSIP.Socket instance"),!1;try{if(!s.isString(e.url))throw o.warn("missing or invalid JsSIP.Socket url property"),new Error("Missing or invalid JsSIP.Socket url property");if(!s.isString(e.via_transport))throw o.warn("missing or invalid JsSIP.Socket via_transport property"),new Error("Missing or invalid JsSIP.Socket via_transport property");if(-1===i.parse(e.sip_uri,"SIP_URI"))throw o.warn("missing or invalid JsSIP.Socket sip_uri property"),new Error("missing or invalid JsSIP.Socket sip_uri property")}catch(e){return!1}try{["connect","disconnect","send"].forEach(function(t){if(!s.isFunction(e[t]))throw o.warn("missing or invalid JsSIP.Socket method: ".concat(t)),new Error("Missing or invalid JsSIP.Socket method: ".concat(t))})}catch(e){return!1}return!0}},{"./Grammar":7,"./Logger":9,"./Utils":28}],23:[function(e,t,n){"use strict";var r=500;t.exports={T1:r,T2:4e3,T4:5e3,TIMER_B:32e3,TIMER_D:0,TIMER_F:32e3,TIMER_H:32e3,TIMER_I:0,TIMER_J:0,TIMER_K:0,TIMER_L:32e3,TIMER_M:32e3,PROVISIONAL_RESPONSE_INTERVAL:6e4}},{}],24:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function i(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function o(e,t,n){return t&&i(e.prototype,t),n&&i(e,n),e}function l(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&u(e,t)}function u(e,t){return(u=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function a(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=h(e);if(t){var i=h(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return c(e)}(this,n)}}function c(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}function h(e){return(h=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var d=e("events").EventEmitter,f=e("./Logger"),_=e("./Constants"),p=e("./SIPMessage"),m=e("./Timers"),v=new f("NonInviteClientTransaction"),g=new f("InviteClientTransaction"),y=new f("AckClientTransaction"),T=new f("NonInviteServerTransaction"),C=new f("InviteServerTransaction"),b={STATUS_TRYING:1,STATUS_PROCEEDING:2,STATUS_CALLING:3,STATUS_ACCEPTED:4,STATUS_COMPLETED:5,STATUS_TERMINATED:6,STATUS_CONFIRMED:7,NON_INVITE_CLIENT:"nict",NON_INVITE_SERVER:"nist",INVITE_CLIENT:"ict",INVITE_SERVER:"ist"},S=function(e){l(n,d);var t=a(n);function n(e,r,i,o){var l;s(this,n),(l=t.call(this)).type=b.NON_INVITE_CLIENT,l.id="z9hG4bK".concat(Math.floor(1e7*Math.random())),l.ua=e,l.transport=r,l.request=i,l.eventHandlers=o;var u="SIP/2.0/".concat(r.via_transport);return u+=" ".concat(e.configuration.via_host,";branch=").concat(l.id),l.request.setHeader("via",u),l.ua.newTransaction(c(l)),l}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"send",value:function(){var e=this;this.stateChanged(b.STATUS_TRYING),this.F=setTimeout(function(){e.timer_F()},m.TIMER_F),this.transport.send(this.request)||this.onTransportError()}},{key:"onTransportError",value:function(){v.debug("transport error occurred, deleting transaction ".concat(this.id)),clearTimeout(this.F),clearTimeout(this.K),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this),this.eventHandlers.onTransportError()}},{key:"timer_F",value:function(){v.debug("Timer F expired for transaction ".concat(this.id)),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this),this.eventHandlers.onRequestTimeout()}},{key:"timer_K",value:function(){this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"receiveResponse",value:function(e){var t=this,n=e.status_code;if(n<200)switch(this.state){case b.STATUS_TRYING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_PROCEEDING),this.eventHandlers.onReceiveResponse(e)}else switch(this.state){case b.STATUS_TRYING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_COMPLETED),clearTimeout(this.F),408===n?this.eventHandlers.onRequestTimeout():this.eventHandlers.onReceiveResponse(e),this.K=setTimeout(function(){t.timer_K()},m.TIMER_K);break;case b.STATUS_COMPLETED:}}},{key:"C",get:function(){return b}}]),n}(),E=function(e){l(n,d);var t=a(n);function n(e,r,i,o){var l;s(this,n),(l=t.call(this)).type=b.INVITE_CLIENT,l.id="z9hG4bK".concat(Math.floor(1e7*Math.random())),l.ua=e,l.transport=r,l.request=i,l.eventHandlers=o,i.transaction=c(l);var u="SIP/2.0/".concat(r.via_transport);return u+=" ".concat(e.configuration.via_host,";branch=").concat(l.id),l.request.setHeader("via",u),l.ua.newTransaction(c(l)),l}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"send",value:function(){var e=this;this.stateChanged(b.STATUS_CALLING),this.B=setTimeout(function(){e.timer_B()},m.TIMER_B),this.transport.send(this.request)||this.onTransportError()}},{key:"onTransportError",value:function(){clearTimeout(this.B),clearTimeout(this.D),clearTimeout(this.M),this.state!==b.STATUS_ACCEPTED&&(g.debug("transport error occurred, deleting transaction ".concat(this.id)),this.eventHandlers.onTransportError()),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"timer_M",value:function(){g.debug("Timer M expired for transaction ".concat(this.id)),this.state===b.STATUS_ACCEPTED&&(clearTimeout(this.B),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"timer_B",value:function(){g.debug("Timer B expired for transaction ".concat(this.id)),this.state===b.STATUS_CALLING&&(this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this),this.eventHandlers.onRequestTimeout())}},{key:"timer_D",value:function(){g.debug("Timer D expired for transaction ".concat(this.id)),clearTimeout(this.B),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"sendACK",value:function(e){var t=this,n=new p.OutgoingRequest(_.ACK,this.request.ruri,this.ua,{route_set:this.request.getHeaders("route"),call_id:this.request.getHeader("call-id"),cseq:this.request.cseq});n.setHeader("from",this.request.getHeader("from")),n.setHeader("via",this.request.getHeader("via")),n.setHeader("to",e.getHeader("to")),this.D=setTimeout(function(){t.timer_D()},m.TIMER_D),this.transport.send(n)}},{key:"cancel",value:function(e){if(this.state===b.STATUS_PROCEEDING){var t=new p.OutgoingRequest(_.CANCEL,this.request.ruri,this.ua,{route_set:this.request.getHeaders("route"),call_id:this.request.getHeader("call-id"),cseq:this.request.cseq});t.setHeader("from",this.request.getHeader("from")),t.setHeader("via",this.request.getHeader("via")),t.setHeader("to",this.request.getHeader("to")),e&&t.setHeader("reason",e),this.transport.send(t)}}},{key:"receiveResponse",value:function(e){var t=this,n=e.status_code;if(n>=100&&n<=199)switch(this.state){case b.STATUS_CALLING:this.stateChanged(b.STATUS_PROCEEDING),this.eventHandlers.onReceiveResponse(e);break;case b.STATUS_PROCEEDING:this.eventHandlers.onReceiveResponse(e)}else if(n>=200&&n<=299)switch(this.state){case b.STATUS_CALLING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_ACCEPTED),this.M=setTimeout(function(){t.timer_M()},m.TIMER_M),this.eventHandlers.onReceiveResponse(e);break;case b.STATUS_ACCEPTED:this.eventHandlers.onReceiveResponse(e)}else if(n>=300&&n<=699)switch(this.state){case b.STATUS_CALLING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_COMPLETED),this.sendACK(e),this.eventHandlers.onReceiveResponse(e);break;case b.STATUS_COMPLETED:this.sendACK(e)}}},{key:"C",get:function(){return b}}]),n}(),A=function(e){l(n,d);var t=a(n);function n(e,r,i,o){var l;s(this,n),(l=t.call(this)).id="z9hG4bK".concat(Math.floor(1e7*Math.random())),l.transport=r,l.request=i,l.eventHandlers=o;var u="SIP/2.0/".concat(r.via_transport);return u+=" ".concat(e.configuration.via_host,";branch=").concat(l.id),l.request.setHeader("via",u),l}return o(n,[{key:"send",value:function(){this.transport.send(this.request)||this.onTransportError()}},{key:"onTransportError",value:function(){y.debug("transport error occurred for transaction ".concat(this.id)),this.eventHandlers.onTransportError()}},{key:"C",get:function(){return b}}]),n}(),R=function(e){l(n,d);var t=a(n);function n(e,r,i){var o;return s(this,n),(o=t.call(this)).type=b.NON_INVITE_SERVER,o.id=i.via_branch,o.ua=e,o.transport=r,o.request=i,o.last_response="",i.server_transaction=c(o),o.state=b.STATUS_TRYING,e.newTransaction(c(o)),o}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"timer_J",value:function(){T.debug("Timer J expired for transaction ".concat(this.id)),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"onTransportError",value:function(){this.transportError||(this.transportError=!0,T.debug("transport error occurred, deleting transaction ".concat(this.id)),clearTimeout(this.J),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"receiveResponse",value:function(e,t,n,r){var s=this;if(100===e)switch(this.state){case b.STATUS_TRYING:this.stateChanged(b.STATUS_PROCEEDING),this.transport.send(t)||this.onTransportError();break;case b.STATUS_PROCEEDING:this.last_response=t,this.transport.send(t)?n&&n():(this.onTransportError(),r&&r())}else if(e>=200&&e<=699)switch(this.state){case b.STATUS_TRYING:case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_COMPLETED),this.last_response=t,this.J=setTimeout(function(){s.timer_J()},m.TIMER_J),this.transport.send(t)?n&&n():(this.onTransportError(),r&&r());break;case b.STATUS_COMPLETED:}}},{key:"C",get:function(){return b}}]),n}(),w=function(e){l(n,d);var t=a(n);function n(e,r,i){var o;return s(this,n),(o=t.call(this)).type=b.INVITE_SERVER,o.id=i.via_branch,o.ua=e,o.transport=r,o.request=i,o.last_response="",i.server_transaction=c(o),o.state=b.STATUS_PROCEEDING,e.newTransaction(c(o)),o.resendProvisionalTimer=null,i.reply(100),o}return o(n,[{key:"stateChanged",value:function(e){this.state=e,this.emit("stateChanged")}},{key:"timer_H",value:function(){C.debug("Timer H expired for transaction ".concat(this.id)),this.state===b.STATUS_COMPLETED&&C.debug("ACK not received, dialog will be terminated"),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"timer_I",value:function(){this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this)}},{key:"timer_L",value:function(){C.debug("Timer L expired for transaction ".concat(this.id)),this.state===b.STATUS_ACCEPTED&&(this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"onTransportError",value:function(){this.transportError||(this.transportError=!0,C.debug("transport error occurred, deleting transaction ".concat(this.id)),null!==this.resendProvisionalTimer&&(clearInterval(this.resendProvisionalTimer),this.resendProvisionalTimer=null),clearTimeout(this.L),clearTimeout(this.H),clearTimeout(this.I),this.stateChanged(b.STATUS_TERMINATED),this.ua.destroyTransaction(this))}},{key:"resend_provisional",value:function(){this.transport.send(this.last_response)||this.onTransportError()}},{key:"receiveResponse",value:function(e,t,n,r){var s=this;if(e>=100&&e<=199)switch(this.state){case b.STATUS_PROCEEDING:this.transport.send(t)||this.onTransportError(),this.last_response=t}if(e>100&&e<=199&&this.state===b.STATUS_PROCEEDING)null===this.resendProvisionalTimer&&(this.resendProvisionalTimer=setInterval(function(){s.resend_provisional()},m.PROVISIONAL_RESPONSE_INTERVAL));else if(e>=200&&e<=299)switch(this.state){case b.STATUS_PROCEEDING:this.stateChanged(b.STATUS_ACCEPTED),this.last_response=t,this.L=setTimeout(function(){s.timer_L()},m.TIMER_L),null!==this.resendProvisionalTimer&&(clearInterval(this.resendProvisionalTimer),this.resendProvisionalTimer=null);case b.STATUS_ACCEPTED:this.transport.send(t)?n&&n():(this.onTransportError(),r&&r())}else if(e>=300&&e<=699)switch(this.state){case b.STATUS_PROCEEDING:null!==this.resendProvisionalTimer&&(clearInterval(this.resendProvisionalTimer),this.resendProvisionalTimer=null),this.transport.send(t)?(this.stateChanged(b.STATUS_COMPLETED),this.H=setTimeout(function(){s.timer_H()},m.TIMER_H),n&&n()):(this.onTransportError(),r&&r())}}},{key:"C",get:function(){return b}}]),n}();t.exports={C:b,NonInviteClientTransaction:S,InviteClientTransaction:E,AckClientTransaction:A,NonInviteServerTransaction:R,InviteServerTransaction:w,checkTransaction:function(e,t){var n,r=e._transactions;switch(t.method){case _.INVITE:if(n=r.ist[t.via_branch]){switch(n.state){case b.STATUS_PROCEEDING:n.transport.send(n.last_response);break;case b.STATUS_ACCEPTED:}return!0}break;case _.ACK:if(!(n=r.ist[t.via_branch]))return!1;if(n.state===b.STATUS_ACCEPTED)return!1;if(n.state===b.STATUS_COMPLETED)return n.state=b.STATUS_CONFIRMED,n.I=setTimeout(function(){n.timer_I()},m.TIMER_I),!0;break;case _.CANCEL:return(n=r.ist[t.via_branch])?(t.reply_sl(200),n.state!==b.STATUS_PROCEEDING):(t.reply_sl(481),!0);default:if(n=r.nist[t.via_branch]){switch(n.state){case b.STATUS_TRYING:break;case b.STATUS_PROCEEDING:case b.STATUS_COMPLETED:n.transport.send(n.last_response)}return!0}}}}},{"./Constants":2,"./Logger":9,"./SIPMessage":21,"./Timers":23,events:31}],25:[function(e,t,n){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var s=e("./Logger"),i=e("./Socket"),o=e("./Constants"),l=new s("Transport"),u={STATUS_CONNECTED:0,STATUS_CONNECTING:1,STATUS_DISCONNECTED:2,SOCKET_STATUS_READY:0,SOCKET_STATUS_ERROR:1,recovery_options:{min_interval:o.CONNECTION_RECOVERY_MIN_INTERVAL,max_interval:o.CONNECTION_RECOVERY_MAX_INTERVAL}};t.exports=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:u.recovery_options;!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),l.debug("new()"),this.status=u.STATUS_DISCONNECTED,this.socket=null,this.sockets=[],this.recovery_options=n,this.recover_attempts=0,this.recovery_timer=null,this.close_requested=!1;try{this.textDecoder=new TextDecoder("utf8")}catch(e){l.warn("cannot use TextDecoder: ".concat(e))}if(void 0===t)throw new TypeError("Invalid argument. undefined 'sockets' argument");t instanceof Array||(t=[t]),t.forEach(function(e){if(!i.isSocket(e.socket))throw new TypeError("Invalid argument. invalid 'JsSIP.Socket' instance");if(e.weight&&!Number(e.weight))throw new TypeError("Invalid argument. 'weight' attribute is not a number");this.sockets.push({socket:e.socket,weight:e.weight||0,status:u.SOCKET_STATUS_READY})},this),this._getSocket()}var t,n,s;return t=e,(n=[{key:"connect",value:function(){l.debug("connect()"),this.isConnected()?l.debug("Transport is already connected"):this.isConnecting()?l.debug("Transport is connecting"):(this.close_requested=!1,this.status=u.STATUS_CONNECTING,this.onconnecting({socket:this.socket,attempts:this.recover_attempts}),this.close_requested||(this.socket.onconnect=this._onConnect.bind(this),this.socket.ondisconnect=this._onDisconnect.bind(this),this.socket.ondata=this._onData.bind(this),this.socket.connect()))}},{key:"disconnect",value:function(){l.debug("close()"),this.close_requested=!0,this.recover_attempts=0,this.status=u.STATUS_DISCONNECTED,null!==this.recovery_timer&&(clearTimeout(this.recovery_timer),this.recovery_timer=null),this.socket.onconnect=function(){},this.socket.ondisconnect=function(){},this.socket.ondata=function(){},this.socket.disconnect(),this.ondisconnect({socket:this.socket,error:!1})}},{key:"send",value:function(e){if(l.debug("send()"),!this.isConnected())return l.warn("unable to send message, transport is not connected"),!1;var t=e.toString();return l.debug("sending message:\n\n".concat(t,"\n")),this.socket.send(t)}},{key:"isConnected",value:function(){return this.status===u.STATUS_CONNECTED}},{key:"isConnecting",value:function(){return this.status===u.STATUS_CONNECTING}},{key:"_reconnect",value:function(){var e=this;this.recover_attempts+=1;var t=Math.floor(Math.random()*Math.pow(2,this.recover_attempts)+1);t<this.recovery_options.min_interval?t=this.recovery_options.min_interval:t>this.recovery_options.max_interval&&(t=this.recovery_options.max_interval),l.debug("reconnection attempt: ".concat(this.recover_attempts,". next connection attempt in ").concat(t," seconds")),this.recovery_timer=setTimeout(function(){e.close_requested||e.isConnected()||e.isConnecting()||(e._getSocket(),e.connect())},1e3*t)}},{key:"_getSocket",value:function(){var e=[];if(this.sockets.forEach(function(t){t.status!==u.SOCKET_STATUS_ERROR&&(0===e.length?e.push(t):t.weight>e[0].weight?e=[t]:t.weight===e[0].weight&&e.push(t))}),0===e.length)return this.sockets.forEach(function(e){e.status=u.SOCKET_STATUS_READY}),void this._getSocket();var t=Math.floor(Math.random()*e.length);this.socket=e[t].socket}},{key:"_onConnect",value:function(){this.recover_attempts=0,this.status=u.STATUS_CONNECTED,null!==this.recovery_timer&&(clearTimeout(this.recovery_timer),this.recovery_timer=null),this.onconnect({socket:this})}},{key:"_onDisconnect",value:function(e,t,n){this.status=u.STATUS_DISCONNECTED,this.ondisconnect({socket:this.socket,error:e,code:t,reason:n}),this.close_requested||(this.sockets.forEach(function(e){this.socket===e.socket&&(e.status=u.SOCKET_STATUS_ERROR)},this),this._reconnect(e))}},{key:"_onData",value:function(e){if("\r\n\r\n"!==e)if("\r\n"!==e){if("string"!=typeof e){try{e=this.textDecoder?this.textDecoder.decode(e):String.fromCharCode.apply(null,new Uint8Array(e))}catch(e){return void l.debug("received binary message failed to be converted into string, message discarded")}l.debug("received binary message:\n\n".concat(e,"\n"))}else l.debug("received text message:\n\n".concat(e,"\n"));this.ondata({transport:this,message:e})}else l.debug("received message with CRLF Keep Alive response");else{l.debug("received message with double-CRLF Keep Alive request");try{this.socket.send("\r\n")}catch(e){l.warn("error sending Keep Alive response: ".concat(e))}}}},{key:"via_transport",get:function(){return this.socket.via_transport}},{key:"url",get:function(){return this.socket.url}},{key:"sip_uri",get:function(){return this.socket.sip_uri}}])&&r(t.prototype,n),s&&r(t,s),e}()},{"./Constants":2,"./Logger":9,"./Socket":22}],26:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function i(e,t,n){return t&&s(e.prototype,t),n&&s(e,n),e}function o(e,t){return(o=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function l(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Date.prototype.toString.call(Reflect.construct(Date,[],function(){})),!0}catch(e){return!1}}();return function(){var n,s=a(e);if(t){var i=a(this).constructor;n=Reflect.construct(s,arguments,i)}else n=s.apply(this,arguments);return function(e,t){if(t&&("object"===r(t)||"function"==typeof t))return t;return u(e)}(this,n)}}function u(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}function a(e){return(a=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}var c=e("events").EventEmitter,h=e("./Logger"),d=e("./Constants"),f=e("./Registrator"),_=e("./RTCSession"),p=e("./Message"),m=e("./Options"),v=e("./Transactions"),g=e("./Transport"),y=e("./Utils"),T=e("./Exceptions"),C=e("./URI"),b=e("./Parser"),S=e("./SIPMessage"),E=e("./sanityCheck"),A=e("./Config"),R=new h("UA"),w={STATUS_INIT:0,STATUS_READY:1,STATUS_USER_CLOSED:2,STATUS_NOT_READY:3,CONFIGURATION_ERROR:1,NETWORK_ERROR:2};t.exports=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),t&&o(e,t)}(n,c);var t=l(n);function n(e){var r;if(function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,n),R.debug("new() [configuration:%o]",e),(r=t.call(this))._cache={credentials:{}},r._configuration=Object.assign({},A.settings),r._dynConfiguration={},r._dialogs={},r._applicants={},r._sessions={},r._transport=null,r._contact=null,r._status=w.STATUS_INIT,r._error=null,r._transactions={nist:{},nict:{},ist:{},ict:{}},r._data={},r._closeTimer=null,void 0===e)throw new TypeError("Not enough arguments");try{r._loadConfig(e)}catch(e){throw r._status=w.STATUS_NOT_READY,r._error=w.CONFIGURATION_ERROR,e}return r._registrator=new f(u(r)),r}return i(n,null,[{key:"C",get:function(){return w}}]),i(n,[{key:"start",value:function(){R.debug("start()"),this._status===w.STATUS_INIT?this._transport.connect():this._status===w.STATUS_USER_CLOSED?(R.debug("restarting UA"),null!==this._closeTimer&&(clearTimeout(this._closeTimer),this._closeTimer=null,this._transport.disconnect()),this._status=w.STATUS_INIT,this._transport.connect()):this._status===w.STATUS_READY?R.debug("UA is in READY status, not restarted"):R.debug("ERROR: connection is down, Auto-Recovery system is trying to reconnect"),this._dynConfiguration.register=this._configuration.register}},{key:"register",value:function(){R.debug("register()"),this._dynConfiguration.register=!0,this._registrator.register()}},{key:"unregister",value:function(e){R.debug("unregister()"),this._dynConfiguration.register=!1,this._registrator.unregister(e)}},{key:"registrator",value:function(){return this._registrator}},{key:"isRegistered",value:function(){return this._registrator.registered}},{key:"isConnected",value:function(){return this._transport.isConnected()}},{key:"call",value:function(e,t){R.debug("call()");var n=new _(this);return n.connect(e,t),n}},{key:"sendMessage",value:function(e,t,n){R.debug("sendMessage()");var r=new p(this);return r.send(e,t,n),r}},{key:"sendOptions",value:function(e,t,n){R.debug("sendOptions()");var r=new m(this);return r.send(e,t,n),r}},{key:"terminateSessions",value:function(e){for(var t in R.debug("terminateSessions()"),this._sessions)this._sessions[t].isEnded()||this._sessions[t].terminate(e)}},{key:"stop",value:function(){var e=this;if(R.debug("stop()"),this._dynConfiguration={},this._status!==w.STATUS_USER_CLOSED){this._registrator.close();var t=Object.keys(this._sessions).length;for(var n in this._sessions)if(Object.prototype.hasOwnProperty.call(this._sessions,n)){R.debug("closing session ".concat(n));try{this._sessions[n].terminate()}catch(e){}}for(var r in this._applicants)if(Object.prototype.hasOwnProperty.call(this._applicants,r))try{this._applicants[r].close()}catch(e){}this._status=w.STATUS_USER_CLOSED,0===Object.keys(this._transactions.nict).length+Object.keys(this._transactions.nist).length+Object.keys(this._transactions.ict).length+Object.keys(this._transactions.ist).length&&0===t?this._transport.disconnect():this._closeTimer=setTimeout(function(){e._closeTimer=null,e._transport.disconnect()},2e3)}else R.debug("UA already closed")}},{key:"normalizeTarget",value:function(e){return y.normalizeTarget(e,this._configuration.hostport_params)}},{key:"get",value:function(e){switch(e){case"authorization_user":return this._configuration.authorization_user;case"realm":return this._configuration.realm;case"ha1":return this._configuration.ha1;case"authorization_jwt":return this._configuration.authorization_jwt;default:return void R.warn('get() | cannot get "%s" parameter in runtime',e)}}},{key:"set",value:function(e,t){switch(e){case"authorization_user":this._configuration.authorization_user=String(t);break;case"password":this._configuration.password=String(t);break;case"realm":this._configuration.realm=String(t);break;case"ha1":this._configuration.ha1=String(t),this._configuration.password=null;break;case"authorization_jwt":this._configuration.authorization_jwt=String(t);break;case"display_name":this._configuration.display_name=t;break;case"extra_headers":this._configuration.extra_headers=t;break;default:return R.warn('set() | cannot set "%s" parameter in runtime',e),!1}return!0}},{key:"newTransaction",value:function(e){this._transactions[e.type][e.id]=e,this.emit("newTransaction",{transaction:e})}},{key:"destroyTransaction",value:function(e){delete this._transactions[e.type][e.id],this.emit("transactionDestroyed",{transaction:e})}},{key:"newDialog",value:function(e){this._dialogs[e.id]=e}},{key:"destroyDialog",value:function(e){delete this._dialogs[e.id]}},{key:"newMessage",value:function(e,t){this._applicants[e]=e,this.emit("newMessage",t)}},{key:"newOptions",value:function(e,t){this._applicants[e]=e,this.emit("newOptions",t)}},{key:"destroyMessage",value:function(e){delete this._applicants[e]}},{key:"newRTCSession",value:function(e,t){this._sessions[e.id]=e,this.emit("newRTCSession",t)}},{key:"destroyRTCSession",value:function(e){delete this._sessions[e.id]}},{key:"registered",value:function(e){this.emit("registered",e)}},{key:"unregistered",value:function(e){this.emit("unregistered",e)}},{key:"registrationFailed",value:function(e){this.emit("registrationFailed",e)}},{key:"receiveRequest",value:function(e){var t=e.method;if(e.ruri.user!==this._configuration.uri.user&&e.ruri.user!==this._contact.uri.user)return R.debug("Request-URI does not point to us"),void(e.method!==d.ACK&&e.reply_sl(404));if(e.ruri.scheme!==d.SIPS){if(!v.checkTransaction(this,e)){if(t===d.INVITE?new v.InviteServerTransaction(this,this._transport,e):t!==d.ACK&&t!==d.CANCEL&&new v.NonInviteServerTransaction(this,this._transport,e),t===d.OPTIONS){if(0===this.listeners("newOptions").length)return void e.reply(200);new m(this).init_incoming(e)}else if(t===d.MESSAGE){if(0===this.listeners("newMessage").length)return void e.reply(405);new p(this).init_incoming(e)}else if(t===d.INVITE&&!e.to_tag&&0===this.listeners("newRTCSession").length)return void e.reply(405);var n,r;if(e.to_tag)(n=this._findDialog(e.call_id,e.from_tag,e.to_tag))?n.receiveRequest(e):t===d.NOTIFY?(r=this._findSession(e))?r.receiveRequest(e):(R.debug("received NOTIFY request for a non existent subscription"),e.reply(481,"Subscription does not exist")):t!==d.ACK&&e.reply(481);else switch(t){case d.INVITE:if(window.RTCPeerConnection)if(e.hasHeader("replaces")){var s=e.replaces;(n=this._findDialog(s.call_id,s.from_tag,s.to_tag))?(r=n.owner).isEnded()?e.reply(603):r.receiveRequest(e):e.reply(481)}else(r=new _(this)).init_incoming(e);else R.warn("INVITE received but WebRTC is not supported"),e.reply(488);break;case d.BYE:e.reply(481);break;case d.CANCEL:(r=this._findSession(e))?r.receiveRequest(e):R.debug("received CANCEL request for a non existent session");break;case d.ACK:break;case d.NOTIFY:this.emit("sipEvent",{event:e.event,request:e}),e.reply(200);break;default:e.reply(405)}}}else e.reply_sl(416)}},{key:"_findSession",value:function(e){var t=e.call_id,n=e.from_tag,r=e.to_tag,s=t+n,i=this._sessions[s],o=t+r,l=this._sessions[o];return i||(l||null)}},{key:"_findDialog",value:function(e,t,n){var r=e+t+n,s=this._dialogs[r];return s||(r=e+n+t,(s=this._dialogs[r])||null)}},{key:"_loadConfig",value:function(e){try{A.load(this._configuration,e)}catch(e){throw e}0===this._configuration.display_name&&(this._configuration.display_name="0"),this._configuration.instance_id||(this._configuration.instance_id=y.newUUID()),this._configuration.jssip_id=y.createRandomToken(5);var t=this._configuration.uri.clone();t.user=null,this._configuration.hostport_params=t.toString().replace(/^sip:/i,"");try{this._transport=new g(this._configuration.sockets,{max_interval:this._configuration.connection_recovery_max_interval,min_interval:this._configuration.connection_recovery_min_interval}),this._transport.onconnecting=function(e){this.emit("connecting",e)}.bind(this),this._transport.onconnect=function(e){if(this._status===w.STATUS_USER_CLOSED)return;this._status=w.STATUS_READY,this._error=null,this.emit("connected",e),this._dynConfiguration.register&&this._registrator.register()}.bind(this),this._transport.ondisconnect=function(e){for(var t=0,n=["nict","ict","nist","ist"];t<n.length;t++){var r=n[t];for(var s in this._transactions[r])Object.prototype.hasOwnProperty.call(this._transactions[r],s)&&this._transactions[r][s].onTransportError()}this.emit("disconnected",e),this._registrator.onTransportClosed(),this._status!==w.STATUS_USER_CLOSED&&(this._status=w.STATUS_NOT_READY,this._error=w.NETWORK_ERROR)}.bind(this),this._transport.ondata=function(e){var t=e.transport,n=e.message;if(!(n=b.parseMessage(n,this)))return;if(this._status===w.STATUS_USER_CLOSED&&n instanceof S.IncomingRequest)return;if(!E(n,this,t))return;if(n instanceof S.IncomingRequest)n.transport=t,this.receiveRequest(n);else if(n instanceof S.IncomingResponse){var r;switch(n.method){case d.INVITE:(r=this._transactions.ict[n.via_branch])&&r.receiveResponse(n);break;case d.ACK:break;default:(r=this._transactions.nict[n.via_branch])&&r.receiveResponse(n)}}}.bind(this)}catch(e){throw R.warn(e),new T.ConfigurationError("sockets",this._configuration.sockets)}if(delete this._configuration.sockets,this._configuration.authorization_user||(this._configuration.authorization_user=this._configuration.uri.user),!this._configuration.registrar_server){var n=this._configuration.uri.clone();n.user=null,n.clearParams(),n.clearHeaders(),this._configuration.registrar_server=n}this._configuration.no_answer_timeout*=1e3,this._configuration.contact_uri?this._configuration.via_host=this._configuration.contact_uri.host:this._configuration.contact_uri=new C("sip",y.createRandomToken(8),this._configuration.via_host,null,{transport:"ws"}),this._contact={pub_gruu:null,temp_gruu:null,uri:this._configuration.contact_uri,toString:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=e.anonymous||null,n=e.outbound||null,r="<";return r+=t?this.temp_gruu||"sip:anonymous@anonymous.invalid;transport=ws":this.pub_gruu||this.uri.toString(),!n||(t?this.temp_gruu:this.pub_gruu)||(r+=";ob"),r+=">"}};var r=["authorization_user","password","realm","ha1","authorization_jwt","display_name","register","extra_headers"];for(var s in this._configuration)Object.prototype.hasOwnProperty.call(this._configuration,s)&&(-1!==r.indexOf(s)?Object.defineProperty(this._configuration,s,{writable:!0,configurable:!1}):Object.defineProperty(this._configuration,s,{writable:!1,configurable:!1}));for(var i in R.debug("configuration parameters after validation:"),this._configuration)if(Object.prototype.hasOwnProperty.call(A.settings,i))switch(i){case"uri":case"registrar_server":R.debug("- ".concat(i,": ").concat(this._configuration[i]));break;case"password":case"ha1":case"authorization_jwt":R.debug("- ".concat(i,": NOT SHOWN"));break;default:R.debug("- ".concat(i,": ").concat(JSON.stringify(this._configuration[i])))}}},{key:"C",get:function(){return w}},{key:"status",get:function(){return this._status}},{key:"contact",get:function(){return this._contact}},{key:"configuration",get:function(){return this._configuration}},{key:"transport",get:function(){return this._transport}}]),n}()},{"./Config":1,"./Constants":2,"./Exceptions":6,"./Logger":9,"./Message":10,"./Options":12,"./Parser":13,"./RTCSession":14,"./Registrator":19,"./SIPMessage":21,"./Transactions":24,"./Transport":25,"./URI":27,"./Utils":28,"./sanityCheck":30,events:31}],27:[function(e,t,n){"use strict";function r(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return s(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return s(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,i=function(){};return{s:i,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function s(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}function i(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function o(e,t,n){return t&&i(e.prototype,t),n&&i(e,n),e}var l=e("./Constants"),u=e("./Utils"),a=e("./Grammar");t.exports=function(){function e(t,n,r,s){var i=arguments.length>4&&void 0!==arguments[4]?arguments[4]:{},o=arguments.length>5&&void 0!==arguments[5]?arguments[5]:{};if(function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),!r)throw new TypeError('missing or invalid "host" parameter');for(var u in this._parameters={},this._headers={},this._scheme=t||l.SIP,this._user=n,this._host=r,this._port=s,i)Object.prototype.hasOwnProperty.call(i,u)&&this.setParam(u,i[u]);for(var a in o)Object.prototype.hasOwnProperty.call(o,a)&&this.setHeader(a,o[a])}return o(e,null,[{key:"parse",value:function(e){return-1!==(e=a.parse(e,"SIP_URI"))?e:void 0}}]),o(e,[{key:"setParam",value:function(e,t){e&&(this._parameters[e.toLowerCase()]=null==t?null:t.toString())}},{key:"getParam",value:function(e){if(e)return this._parameters[e.toLowerCase()]}},{key:"hasParam",value:function(e){if(e)return!!this._parameters.hasOwnProperty(e.toLowerCase())}},{key:"deleteParam",value:function(e){if(e=e.toLowerCase(),this._parameters.hasOwnProperty(e)){var t=this._parameters[e];return delete this._parameters[e],t}}},{key:"clearParams",value:function(){this._parameters={}}},{key:"setHeader",value:function(e,t){this._headers[u.headerize(e)]=Array.isArray(t)?t:[t]}},{key:"getHeader",value:function(e){if(e)return this._headers[u.headerize(e)]}},{key:"hasHeader",value:function(e){if(e)return!!this._headers.hasOwnProperty(u.headerize(e))}},{key:"deleteHeader",value:function(e){if(e=u.headerize(e),this._headers.hasOwnProperty(e)){var t=this._headers[e];return delete this._headers[e],t}}},{key:"clearHeaders",value:function(){this._headers={}}},{key:"clone",value:function(){return new e(this._scheme,this._user,this._host,this._port,JSON.parse(JSON.stringify(this._parameters)),JSON.parse(JSON.stringify(this._headers)))}},{key:"toString",value:function(){var e=[],t="".concat(this._scheme,":");for(var n in this._user&&(t+="".concat(u.escapeUser(this._user),"@")),t+=this._host,(this._port||0===this._port)&&(t+=":".concat(this._port)),this._parameters)Object.prototype.hasOwnProperty.call(this._parameters,n)&&(t+=";".concat(n),null!==this._parameters[n]&&(t+="=".concat(this._parameters[n])));for(var s in this._headers)if(Object.prototype.hasOwnProperty.call(this._headers,s)){var i,o=r(this._headers[s]);try{for(o.s();!(i=o.n()).done;){var l=i.value;e.push("".concat(s,"=").concat(l))}}catch(e){o.e(e)}finally{o.f()}}return e.length>0&&(t+="?".concat(e.join("&"))),t}},{key:"toAor",value:function(e){var t="".concat(this._scheme,":");return this._user&&(t+="".concat(u.escapeUser(this._user),"@")),t+=this._host,e&&(this._port||0===this._port)&&(t+=":".concat(this._port)),t}},{key:"scheme",get:function(){return this._scheme},set:function(e){this._scheme=e.toLowerCase()}},{key:"user",get:function(){return this._user},set:function(e){this._user=e}},{key:"host",get:function(){return this._host},set:function(e){this._host=e.toLowerCase()}},{key:"port",get:function(){return this._port},set:function(e){this._port=0===e?e:parseInt(e,10)||null}}]),e}()},{"./Constants":2,"./Grammar":7,"./Utils":28}],28:[function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function s(e,t){var n;if("undefined"==typeof Symbol||null==e[Symbol.iterator]){if(Array.isArray(e)||(n=function(e,t){if(!e)return;if("string"==typeof e)return i(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);"Object"===n&&e.constructor&&(n=e.constructor.name);if("Map"===n||"Set"===n)return Array.from(e);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return i(e,t)}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0,s=function(){};return{s:s,n:function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}},e:function(e){throw e},f:s}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,l=!0,u=!1;return{s:function(){n=e[Symbol.iterator]()},n:function(){var e=n.next();return l=e.done,e},e:function(e){u=!0,o=e},f:function(){try{l||null==n.return||n.return()}finally{if(u)throw o}}}}function i(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}var o=e("./Constants"),l=e("./URI"),u=e("./Grammar");n.str_utf8_length=function(e){return unescape(encodeURIComponent(e)).length};var a=n.isFunction=function(e){return void 0!==e&&"[object Function]"===Object.prototype.toString.call(e)};n.isString=function(e){return void 0!==e&&"[object String]"===Object.prototype.toString.call(e)},n.isDecimal=function(e){return!isNaN(e)&&parseFloat(e)===parseInt(e,10)},n.isEmpty=function(e){return null===e||""===e||void 0===e||Array.isArray(e)&&0===e.length||"number"==typeof e&&isNaN(e)},n.hasMethods=function(e){for(var t=arguments.length,n=new Array(t>1?t-1:0),r=1;r<t;r++)n[r-1]=arguments[r];for(var s=0,i=n;s<i.length;s++){var o=i[s];if(a(e[o]))return!1}return!0};var c=n.createRandomToken=function(e){var t,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:32,r="";for(t=0;t<e;t++)r+=(Math.random()*n|0).toString(n);return r};n.newTag=function(){return c(10)},n.newUUID=function(){return"xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g,function(e){var t=16*Math.random()|0;return("x"===e?t:3&t|8).toString(16)})},n.hostType=function(e){if(e)return-1!==(e=u.parse(e,"host"))?e.host_type:void 0};var h=n.escapeUser=function(e){return encodeURIComponent(decodeURIComponent(e)).replace(/%3A/gi,":").replace(/%2B/gi,"+").replace(/%3F/gi,"?").replace(/%2F/gi,"/")};n.normalizeTarget=function(e,t){if(e){if(e instanceof l)return e;if("string"==typeof e){var n,r,s,i=e.split("@");switch(i.length){case 1:if(!t)return;n=e,r=t;break;case 2:n=i[0],r=i[1];break;default:n=i.slice(0,i.length-1).join("@"),r=i[i.length-1]}return n=n.replace(/^(sips?|tel):/i,""),/^[-.()]*\+?[0-9\-.()]+$/.test(n)&&(n=n.replace(/[-.()]/g,"")),e="".concat(o.SIP,":").concat(h(n),"@").concat(r),(s=l.parse(e))?s:void 0}}else;},n.headerize=function(e){var 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r=e("./parser"),s=e("./writer");n.write=s,n.parse=r.parse,n.parseParams=r.parseParams,n.parseFmtpConfig=r.parseFmtpConfig,n.parsePayloads=r.parsePayloads,n.parseRemoteCandidates=r.parseRemoteCandidates,n.parseImageAttributes=r.parseImageAttributes,n.parseSimulcastStreamList=r.parseSimulcastStreamList},{"./parser":38,"./writer":39}],38:[function(e,t,n){var r=function(e){return String(Number(e))===e?Number(e):e},s=function(e,t,n){var s=e.name&&e.names;e.push&&!t[e.push]?t[e.push]=[]:s&&!t[e.name]&&(t[e.name]={});var i=e.push?{}:s?t[e.name]:t;!function(e,t,n,s){if(s&&!n)t[s]=r(e[1]);else for(var i=0;i<n.length;i+=1)null!=e[i+1]&&(t[n[i]]=r(e[i+1]))}(n.match(e.reg),i,e.names,e.name),e.push&&t[e.push].push(i)},i=e("./grammar"),o=RegExp.prototype.test.bind(/^([a-z])=(.*)/);n.parse=function(e){var t={},n=[],r=t;return e.split(/(\r\n|\r|\n)/).filter(o).forEach(function(e){var t=e[0],o=e.slice(2);"m"===t&&(n.push({rtp:[],fmtp:[]}),r=n[n.length-1]);for(var l=0;l<(i[t]||[]).length;l+=1){var u=i[t][l];if(u.reg.test(o))return s(u,r,o)}}),t.media=n,t};var l=function(e,t){var n=t.split(/=(.+)/,2);return 2===n.length?e[n[0]]=r(n[1]):1===n.length&&t.length>1&&(e[n[0]]=void 0),e};n.parseParams=function(e){return e.split(/;\s?/).reduce(l,{})},n.parseFmtpConfig=n.parseParams,n.parsePayloads=function(e){return e.toString().split(" ").map(Number)},n.parseRemoteCandidates=function(e){for(var t=[],n=e.split(" ").map(r),s=0;s<n.length;s+=3)t.push({component:n[s],ip:n[s+1],port:n[s+2]});return t},n.parseImageAttributes=function(e){return e.split(" ").map(function(e){return e.substring(1,e.length-1).split(",").reduce(l,{})})},n.parseSimulcastStreamList=function(e){return e.split(";").map(function(e){return e.split(",").map(function(e){var t,n=!1;return"~"!==e[0]?t=r(e):(t=r(e.substring(1,e.length)),n=!0),{scid:t,paused:n}})})}},{"./grammar":36}],39:[function(e,t,n){var r=e("./grammar"),s=/%[sdv%]/g,i=function(e,t,n){var r=[e+"="+(t.format instanceof Function?t.format(t.push?n:n[t.name]):t.format)];if(t.names)for(var i=0;i<t.names.length;i+=1){var o=t.names[i];t.name?r.push(n[t.name][o]):r.push(n[t.names[i]])}else r.push(n[t.name]);return function(e){var t=1,n=arguments,r=n.length;return e.replace(s,function(e){if(t>=r)return e;var s=n[t];switch(t+=1,e){case"%%":return"%";case"%s":return String(s);case"%d":return Number(s);case"%v":return""}})}.apply(null,r)},o=["v","o","s","i","u","e","p","c","b","t","r","z","a"],l=["i","c","b","a"];t.exports=function(e,t){t=t||{},null==e.version&&(e.version=0),null==e.name&&(e.name=" "),e.media.forEach(function(e){null==e.payloads&&(e.payloads="")});var n=t.outerOrder||o,s=t.innerOrder||l,u=[];return n.forEach(function(t){r[t].forEach(function(n){n.name in e&&null!=e[n.name]?u.push(i(t,n,e)):n.push in e&&null!=e[n.push]&&e[n.push].forEach(function(e){u.push(i(t,n,e))})})}),e.media.forEach(function(e){u.push(i("m",r.m[0],e)),s.forEach(function(t){r[t].forEach(function(n){n.name in e&&null!=e[n.name]?u.push(i(t,n,e)):n.push in e&&null!=e[n.push]&&e[n.push].forEach(function(e){u.push(i(t,n,e))})})})}),u.join("\r\n")+"\r\n"}},{"./grammar":36}],40:[function(e,t,n){t.exports={name:"jssip",title:"JsSIP",description:"the Javascript SIP library",version:"3.10.1",homepage:"https://jssip.net",contributors:["José Luis Millán <jmillan@aliax.net> (https://github.com/jmillan)","Iñaki Baz Castillo <ibc@aliax.net> (https://inakibaz.me)"],types:"lib/JsSIP.d.ts",main:"lib-es5/JsSIP.js",keywords:["sip","websocket","webrtc","node","browser","library"],license:"MIT",repository:{type:"git",url:"https://github.com/versatica/JsSIP.git"},bugs:{url:"https://github.com/versatica/JsSIP/issues"},dependencies:{"@types/events":"^3.0.0","@types/debug":"^4.1.7",debug:"^4.3.1",events:"^3.3.0","sdp-transform":"^2.14.1"},devDependencies:{"@babel/core":"^7.19.6","@babel/preset-env":"^7.19.4","ansi-colors":"^3.2.4",browserify:"^16.5.1",eslint:"^5.16.0","fancy-log":"^1.3.3",gulp:"^4.0.2","gulp-babel":"^8.0.0","gulp-eslint":"^5.0.0","gulp-expect-file":"^1.0.2","gulp-header":"^2.0.9","gulp-nodeunit-runner":"^0.2.2","gulp-plumber":"^1.2.1","gulp-rename":"^1.4.0","gulp-uglify-es":"^1.0.4",pegjs:"^0.7.0","vinyl-buffer":"^1.0.1","vinyl-source-stream":"^2.0.0"},scripts:{lint:"node npm-scripts.js lint",test:"node npm-scripts.js test",prepublish:"node npm-scripts.js prepublish",release:"node npm-scripts.js release"}}},{}]},{},[8])(8)});
\ No newline at end of file
diff --git a/gulpfile.js b/gulpfile.js
index 9a63a7795..5feebdb58 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -105,7 +105,8 @@ gulp.task('test', function()
     'test/test-parser.js',
     'test/test-properties.js',
     'test/test-UA-no-WebRTC.js',
-    'test/test-digestAuthentication.js'
+    'test/test-digestAuthentication.js',
+    'test/test-UA-subscriber-notifier.js'
   ];
 
   return gulp.src(src)
diff --git a/lib/Config.js b/lib/Config.js
index 67ae638a8..18fcdbc1a 100644
--- a/lib/Config.js
+++ b/lib/Config.js
@@ -32,9 +32,10 @@ exports.settings = {
   no_answer_timeout              : 60,
 
   // Registration parameters.
-  register         : true,
-  register_expires : 600,
-  registrar_server : null,
+  register                : true,
+  register_expires        : 600,
+  register_from_tag_trail : '',
+  registrar_server        : null,
 
   // Connection options.
   sockets                          : null,
@@ -282,6 +283,16 @@ const checks = {
       }
     },
 
+    register_from_tag_trail(register_from_tag_trail)
+    {
+      if (typeof register_from_tag_trail === 'function')
+      {
+        return register_from_tag_trail;
+      }
+
+      return String(register_from_tag_trail);
+    },
+
     registrar_server(registrar_server)
     {
       if (!/^sip:/i.test(registrar_server))
diff --git a/lib/Constants.d.ts b/lib/Constants.d.ts
index 2d7527838..31297cc62 100644
--- a/lib/Constants.d.ts
+++ b/lib/Constants.d.ts
@@ -57,7 +57,7 @@ export declare enum DTMF_TRANSPORT {
 }
 
 export const REASON_PHRASE: Record<number, string>
-export const ALLOWED_METHODS = 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY'
+export const ALLOWED_METHODS = 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY,SUBSCRIBE'
 export const ACCEPTED_BODY_TYPES = 'application/sdp, application/dtmf-relay'
 export const MAX_FORWARDS = 69
 export const SESSION_EXPIRES = 90
diff --git a/lib/Constants.js b/lib/Constants.js
index 5cb3a88a4..bb10550d3 100644
--- a/lib/Constants.js
+++ b/lib/Constants.js
@@ -149,7 +149,7 @@ module.exports = {
     606 : 'Not Acceptable'
   },
 
-  ALLOWED_METHODS                  : 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY',
+  ALLOWED_METHODS                  : 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY,SUBSCRIBE',
   ACCEPTED_BODY_TYPES              : 'application/sdp, application/dtmf-relay',
   MAX_FORWARDS                     : 69,
   SESSION_EXPIRES                  : 90,
diff --git a/lib/Notifier.d.ts b/lib/Notifier.d.ts
new file mode 100644
index 000000000..6a4e67e6e
--- /dev/null
+++ b/lib/Notifier.d.ts
@@ -0,0 +1,24 @@
+import {EventEmitter} from 'events'
+import {SUBSCRIBE, NOTIFY} from './Constants'
+import * as Utils from './Utils'
+
+declare enum NotifierTerminatedCode {
+    NOTIFY_RESPONSE_TIMEOUT = 0, 
+    NOTIFY_TRANSPORT_ERROR = 1, 
+    NOTIFY_NON_OK_RESPONSE = 2, 
+    NOTIFY_FAILED_AUTHENTICATION = 3,
+    SEND_FINAL_NOTIFY = 4, 
+    RECEIVE_UNSUBSCRIBE = 5, 
+    SUBSCRIPTION_EXPIRED = 6  
+}
+
+export class Notifier extends EventEmitter {
+  start(): void;
+  setActiveState(): void;
+  notify(body?: string): void; 
+  terminate(body?: string, reason?: string): void; 
+  get state(): string;
+  get id(): string;
+  static get C(): typeof NotifierTerminatedCode;
+  get C(): typeof NotifierTerminatedCode;
+}
\ No newline at end of file
diff --git a/lib/Notifier.js b/lib/Notifier.js
new file mode 100644
index 000000000..b3d51ae22
--- /dev/null
+++ b/lib/Notifier.js
@@ -0,0 +1,387 @@
+const EventEmitter = require('events').EventEmitter;
+const Logger = require('./Logger');
+const JsSIP_C = require('./Constants');
+const Utils = require('./Utils');
+const Dialog = require('./Dialog');
+
+const logger = new Logger('Notifier');
+
+/**
+ * Termination codes.
+ */
+const C = {
+  // Termination codes.
+  NOTIFY_RESPONSE_TIMEOUT      : 0,
+  NOTIFY_TRANSPORT_ERROR       : 1,
+  NOTIFY_NON_OK_RESPONSE       : 2,
+  NOTIFY_FAILED_AUTHENTICATION : 3,
+  SEND_FINAL_NOTIFY            : 4,
+  RECEIVE_UNSUBSCRIBE          : 5,
+  SUBSCRIPTION_EXPIRED         : 6,
+
+  // Notifer states
+  STATE_PENDING    : 0,
+  STATE_ACTIVE     : 1,
+  STATE_TERMINATED : 2
+};
+
+/**
+ * RFC 6665 Notifier implementation.
+ */
+module.exports = class Notifier extends EventEmitter
+{
+  /**
+   * Expose C object.
+   */
+  static get C()
+  {
+    return C;
+  }
+
+  get C()
+  {
+    return C;
+  }
+
+  /**
+   * @param {UA} ua - JsSIP User Agent instance.
+   * @param {IncomingRequest} subscribe - Subscribe request.
+   * @param {string} contentType - Content-Type header value.
+   * @param {NotifierOptions} options - Optional parameters.
+   *   @param {Array<string>}  extraHeaders - Additional SIP headers.
+   *   @param {string} allowEvents - Allow-Events header value.
+   *   @param {boolean} pending - Set initial dialog state as "pending".
+   */
+  constructor(ua, subscribe, contentType, { extraHeaders, allowEvents, pending })
+  {
+    logger.debug('new');
+
+    super();
+
+    if (!subscribe)
+    {
+      throw new TypeError('subscribe is undefined');
+    }
+
+    if (!subscribe.hasHeader('contact'))
+    {
+      throw new TypeError('subscribe - no contact header');
+    }
+
+    if (!contentType)
+    {
+      throw new TypeError('contentType is undefined');
+    }
+
+    this._ua = ua;
+    this._initial_subscribe = subscribe;
+    this._expires_timestamp = null;
+    this._expires_timer = null;
+
+    // Notifier state: pending, active, terminated. Not used: init, resp_wait.
+    this._state = pending ? C.STATE_PENDING : C.STATE_ACTIVE;
+
+    // Custom session empty object for high level use.
+    this.data = {};
+
+    this._dialog = null;
+
+    const eventName = subscribe.getHeader('event');
+
+    this._content_type = contentType;
+    this._expires = parseInt(subscribe.getHeader('expires'));
+    this._headers = Utils.cloneArray(extraHeaders);
+    this._headers.push(`Event: ${eventName}`);
+
+    // Use contact from extraHeaders or create it.
+    this._contact = this._headers.find((header) => header.startsWith('Contact'));
+    if (!this._contact)
+    {
+      this._contact = `Contact: ${this._ua._contact.toString()}`;
+
+      this._headers.push(this._contact);
+    }
+
+    if (allowEvents)
+    {
+      this._headers.push(`Allow-Events: ${allowEvents}`);
+    }
+
+    this._target = subscribe.from.uri.user;
+    subscribe.to_tag = Utils.newTag();
+
+    // Create dialog for normal and fetch-subscribe.
+    const dialog = new Dialog(this, subscribe, 'UAS');
+
+    this._dialog = dialog;
+
+    if (this._expires > 0)
+    {
+      // Set expires timer and time-stamp.
+      this._setExpiresTimer();
+    }
+  }
+
+  /**
+   * Dialog callback.
+   * Called also for initial subscribe.
+   * Supported RFC 6665 4.4.3: initial fetch subscribe (with expires: 0).
+   */
+  receiveRequest(request)
+  {
+    if (request.method !== JsSIP_C.SUBSCRIBE)
+    {
+      request.reply(405);
+
+      return;
+    }
+
+    if (request.hasHeader('expires'))
+    {
+      this._expires = parseInt(request.getHeader('expires'));
+    }
+    else
+    {
+      // RFC 6665 3.1.1, default expires value.
+      this._expires = 900;
+
+      logger.debug(`missing Expires header field, default value set: ${this._expires}`);
+    }
+    request.reply(200, null, [ `Expires: ${this._expires}`, `${this._contact}` ]);
+
+    const body = request.body;
+    const content_type = request.getHeader('content-type');
+    const is_unsubscribe = this._expires === 0;
+
+    if (!is_unsubscribe)
+    {
+      this._setExpiresTimer();
+    }
+
+    logger.debug('emit "subscribe"');
+    this.emit('subscribe', is_unsubscribe, request, body, content_type);
+
+    if (is_unsubscribe)
+    {
+      this._dialogTerminated(C.RECEIVE_UNSUBSCRIBE);
+    }
+  }
+
+  /**
+   * User API
+   */
+  /**
+   * Please call after creating the Notifier instance and setting the event handlers.
+   */
+  start()
+  {
+    logger.debug('start()');
+
+    this.receiveRequest(this._initial_subscribe);
+  }
+
+  /**
+   * Switch pending dialog state to active.
+   */
+  setActiveState()
+  {
+    logger.debug('setActiveState()');
+
+    if (this._state === C.STATE_PENDING)
+    {
+      this._state = C.STATE_ACTIVE;
+    }
+  }
+
+  /**
+   *  Send the initial and subsequent notify request.
+   *  @param {string} body - notify request body.
+   */
+  notify(body=null)
+  {
+    logger.debug('notify()');
+
+    if (this._state === C.STATE_TERMINATED)
+    {
+      throw new Error('Cannot send notify in terminated state.');
+    }
+
+    let expires = Math.floor((this._expires_timestamp - new Date().getTime()) / 1000);
+
+    if (expires < 0)
+    {
+      expires = 0;
+    }
+
+    this._notify([ `;expires=${expires}` ], body);
+  }
+
+  /**
+   * @param {Array<string>} subsStateParams subscription state parameters.
+   * @param {String} body Notify body
+   * @param {Array<string>} extraHeaders
+   */
+  _notify(subsStateParameters, body=null, extraHeaders=null)
+  {
+    // Prevent send notify after final notify.
+    if (!this._dialog)
+    {
+      logger.warn('final notify has sent');
+
+      return;
+    }
+
+    // Build Subscription-State header with parameters.
+    let subsState = `Subscription-State: ${this._stateToString()}`;
+
+    for (const param of subsStateParameters)
+    {
+      subsState += param;
+    }
+
+    let headers = this._headers.slice();
+
+    headers.push(subsState);
+
+    if (extraHeaders)
+    {
+      headers = headers.concat(extraHeaders);
+    }
+
+    if (body)
+    {
+      headers.push(`Content-Type: ${this._content_type}`);
+    }
+
+    this._dialog.sendRequest(JsSIP_C.NOTIFY, {
+      body,
+      extraHeaders  : headers,
+      eventHandlers : {
+        onRequestTimeout : () =>
+        {
+          this._dialogTerminated(C.NOTIFY_RESPONSE_TIMEOUT);
+        },
+        onTransportError : () =>
+        {
+          this._dialogTerminated(C.NOTIFY_TRANSPORT_ERROR);
+        },
+        onErrorResponse : (response) =>
+        {
+          if (response.status_code === 401 || response.status_code === 407)
+          {
+            this._dialogTerminated(C.NOTIFY_FAILED_AUTHENTICATION);
+          }
+          else
+          {
+            this._dialogTerminated(C.NOTIFY_NON_OK_RESPONSE);
+          }
+        },
+        onDialogError : () =>
+        {
+          this._dialogTerminated(C.NOTIFY_NON_OK_RESPONSE);
+        }
+      }
+    });
+  }
+
+  /**
+   *  Terminate. (Send the final NOTIFY request).
+   *
+   * @param {string} body - Notify message body.
+   * @param {string} reason - Set Subscription-State reason parameter.
+   * @param {number} retryAfter - Set Subscription-State retry-after parameter.
+   */
+  terminate(body = null, reason = null, retryAfter = null)
+  {
+    logger.debug('terminate()');
+
+    this._state = C.STATE_TERMINATED;
+
+    const subsStateParameters = [];
+
+    if (reason)
+    {
+      subsStateParameters.push(`;reason=${reason}`);
+    }
+
+    if (retryAfter !== null)
+    {
+      subsStateParameters.push(`;retry-after=${retryAfter}`);
+    }
+
+    this._notify(subsStateParameters, body);
+
+    this._dialogTerminated(reason === 'timeout' ? C.SUBSCRIPTION_EXPIRED : C.SEND_FINAL_NOTIFY);
+  }
+
+  /**
+   * Get dialog state.
+   */
+  get state()
+  {
+    return this._state;
+  }
+
+  /**
+   * Get dialog id.
+   */
+  get id()
+  {
+    return this._dialog ? this._dialog.id : null;
+  }
+
+  /**
+   * Private API
+   */
+  _dialogTerminated(termination_code)
+  {
+    if (!this._dialog)
+    {
+      return;
+    }
+
+    this._state = C.STATE_TERMINATED;
+    clearTimeout(this._expires_timer);
+
+    if (this._dialog)
+    {
+      this._dialog.terminate();
+      this._dialog = null;
+    }
+
+    // For SUBSCRIPTION_EXPIRED the 'terminated' event was fired in expiration timer
+    if (termination_code !== C.SUBSCRIPTION_EXPIRED)
+    {
+      logger.debug(`emit "terminated" code=${termination_code}, send final notify=false`);
+      this.emit('terminated', termination_code, false);
+    }
+  }
+
+  _setExpiresTimer()
+  {
+    this._expires_timestamp = new Date().getTime() + (this._expires * 1000);
+
+    clearTimeout(this._expires_timer);
+    this._expires_timer = setTimeout(() =>
+    {
+      if (!this._dialog)
+      {
+        return;
+      }
+
+      logger.debug(`emit "terminated" code=${C.SUBSCRIPTION_EXPIRED}, send final notify=true`);
+      this.emit('terminated', C.SUBSCRIPTION_EXPIRED, true);
+    }, this._expires * 1000);
+  }
+
+  _stateToString()
+  {
+    switch (this._state)
+    {
+      case C.STATE_PENDING: return 'pending';
+      case C.STATE_ACTIVE: return 'active';
+      case C.STATE_TERMINATED: return 'terminated';
+      default: throw new TypeError('wrong state value');
+    }
+  }
+};
diff --git a/lib/RTCSession.d.ts b/lib/RTCSession.d.ts
index edff17102..7e52d447d 100644
--- a/lib/RTCSession.d.ts
+++ b/lib/RTCSession.d.ts
@@ -1,4 +1,4 @@
-import {EventEmitter, Listener} from 'events'
+import {EventEmitter} from 'events'
 
 import {IncomingRequest, IncomingResponse, OutgoingRequest} from './SIPMessage'
 import {NameAddrHeader} from './NameAddrHeader'
@@ -25,17 +25,12 @@ export declare enum Originator {
 }
 
 // options
-export interface MediaConstraints {
-  audio?: boolean;
-  video?: boolean;
-}
-
 export interface ExtraHeaders {
   extraHeaders?: string[];
 }
 
 export interface AnswerOptions extends ExtraHeaders {
-  mediaConstraints?: MediaConstraints;
+  mediaConstraints?: MediaStreamConstraints;
   mediaStream?: MediaStream;
   pcConfig?: RTCConfiguration;
   rtcConstraints?: object;
@@ -177,6 +172,7 @@ export interface IncomingAckEvent {
 }
 
 // listener
+export type GenericErrorListener = (error: any) => void;
 export type PeerConnectionListener = (event: PeerConnectionEvent) => void;
 export type ConnectingListener = (event: ConnectingEvent) => void;
 export type SendingListener = (event: SendingEvent) => void;
@@ -222,11 +218,11 @@ export interface RTCSessionEventMap {
   'replaces': ReferListener;
   'sdp': SDPListener;
   'icecandidate': IceCandidateListener;
-  'getusermediafailed': Listener;
-  'peerconnection:createofferfailed': Listener;
-  'peerconnection:createanswerfailed': Listener;
-  'peerconnection:setlocaldescriptionfailed': Listener;
-  'peerconnection:setremotedescriptionfailed': Listener;
+  'getusermediafailed': GenericErrorListener;
+  'peerconnection:createofferfailed': GenericErrorListener;
+  'peerconnection:createanswerfailed': GenericErrorListener;
+  'peerconnection:setlocaldescriptionfailed': GenericErrorListener;
+  'peerconnection:setremotedescriptionfailed': GenericErrorListener;
 }
 
 declare enum SessionStatus {
diff --git a/lib/RTCSession.js b/lib/RTCSession.js
index df9e50a56..7a1dfd63f 100644
--- a/lib/RTCSession.js
+++ b/lib/RTCSession.js
@@ -1933,7 +1933,7 @@ module.exports = class RTCSession extends EventEmitter
          * - 'connection.iceGatheringState' is 'gathering' and 'iceReady' is true.
          */
         const iceRestart = constraints && constraints.iceRestart;
-        
+
         if ((connection.iceGatheringState === 'complete' && !iceRestart) ||
           (connection.iceGatheringState === 'gathering' && this._iceReady))
         {
@@ -1959,6 +1959,11 @@ module.exports = class RTCSession extends EventEmitter
 
           const ready = () =>
           {
+            if (finished)
+            {
+              return;
+            }
+
             connection.removeEventListener('icecandidate', iceCandidateListener);
             connection.removeEventListener('icegatheringstatechange', iceGatheringStateListener);
 
@@ -1988,8 +1993,7 @@ module.exports = class RTCSession extends EventEmitter
                 ready
               });
             }
-
-            else if (!finished)
+            else
             {
               ready();
             }
@@ -1997,7 +2001,7 @@ module.exports = class RTCSession extends EventEmitter
 
           connection.addEventListener('icegatheringstatechange', iceGatheringStateListener = () =>
           {
-            if ((connection.iceGatheringState === 'complete') && !finished)
+            if (connection.iceGatheringState === 'complete')
             {
               ready();
             }
diff --git a/lib/Registrator.js b/lib/Registrator.js
index 2c889741e..f47114902 100644
--- a/lib/Registrator.js
+++ b/lib/Registrator.js
@@ -49,7 +49,7 @@ module.exports = class Registrator
 
     // Contents of the sip.instance Contact header parameter.
     this._sipInstance = `"<urn:uuid:${this._ua.configuration.instance_id}>"`;
-    
+
     this._contact += `;reg-id=${this._reg_id}`;
     this._contact += `;+sip.instance=${this._sipInstance}`;
   }
@@ -109,11 +109,26 @@ module.exports = class Registrator
 ${this._contact};expires=${this._expires}${this._extraContactParams}`);
     extraHeaders.push(`Expires: ${this._expires}`);
 
+    let fromTag = Utils.newTag();
+
+    if (this._ua.configuration.register_from_tag_trail)
+    {
+      if (typeof this._ua.configuration.register_from_tag_trail === 'function')
+      {
+        fromTag += this._ua.configuration.register_from_tag_trail();
+      }
+      else
+      {
+        fromTag += this._ua.configuration.register_from_tag_trail;
+      }
+    }
+
     const request = new SIPMessage.OutgoingRequest(
       JsSIP_C.REGISTER, this._registrar, this._ua, {
-        'to_uri'  : this._to_uri,
-        'call_id' : this._call_id,
-        'cseq'    : (this._cseq += 1)
+        'to_uri'   : this._to_uri,
+        'call_id'  : this._call_id,
+        'cseq'     : (this._cseq += 1),
+        'from_tag' : fromTag
       }, extraHeaders);
 
     const request_sender = new RequestSender(this._ua, request, {
diff --git a/lib/Subscriber.d.ts b/lib/Subscriber.d.ts
new file mode 100644
index 000000000..2fdb047a8
--- /dev/null
+++ b/lib/Subscriber.d.ts
@@ -0,0 +1,23 @@
+import {EventEmitter} from 'events'
+import {SUBSCRIBE, NOTIFY} from './Constants'
+import * as Utils from './Utils'
+
+declare enum SubscriberTerminatedCode {
+  SUBSCRIBE_RESPONSE_TIMEOUT = 0, 
+  SUBSCRIBE_TRANSPORT_ERROR = 1, 
+  SUBSCRIBE_NON_OK_RESPONSE = 2, 
+  SUBSCRIBE_BAD_OK_RESPONSE = 3,
+  SUBSCRIBE_FAILED_AUTHENTICATION = 4,
+  UNSUBSCRIBE_TIMEOUT = 5, 
+  RECEIVE_FINAL_NOTIFY = 6,
+  RECEIVE_BAD_NOTIFY = 7
+}
+
+export class Subscriber extends EventEmitter {
+  subscribe(body?: string): void;
+  terminate(body?: string): void;
+  get state(): string;
+  get id(): string;
+  static get C(): typeof SubscriberTerminatedCode;
+  get C(): typeof SubscriberTerminatedCode;
+}
\ No newline at end of file
diff --git a/lib/Subscriber.js b/lib/Subscriber.js
new file mode 100644
index 000000000..31cfc01ac
--- /dev/null
+++ b/lib/Subscriber.js
@@ -0,0 +1,605 @@
+const EventEmitter = require('events').EventEmitter;
+const Logger = require('./Logger');
+const JsSIP_C = require('./Constants');
+const Utils = require('./Utils');
+const Grammar = require('./Grammar');
+const SIPMessage = require('./SIPMessage');
+const RequestSender = require('./RequestSender');
+const Dialog = require('./Dialog');
+
+const logger = new Logger('Subscriber');
+
+/**
+ * Termination codes.
+ */
+const C = {
+  // Termination codes.
+  SUBSCRIBE_RESPONSE_TIMEOUT      : 0,
+  SUBSCRIBE_TRANSPORT_ERROR       : 1,
+  SUBSCRIBE_NON_OK_RESPONSE       : 2,
+  SUBSCRIBE_BAD_OK_RESPONSE       : 3,
+  SUBSCRIBE_FAILED_AUTHENTICATION : 4,
+  UNSUBSCRIBE_TIMEOUT             : 5,
+  RECEIVE_FINAL_NOTIFY            : 6,
+  RECEIVE_BAD_NOTIFY              : 7,
+
+  // Subscriber states.
+  STATE_PENDING     : 0,
+  STATE_ACTIVE      : 1,
+  STATE_TERMINATED  : 2,
+  STATE_INIT        : 3,
+  STATE_NOTIFY_WAIT : 4
+};
+
+/**
+ * RFC 6665 Subscriber implementation.
+ */
+module.exports = class Subscriber extends EventEmitter
+{
+  /**
+   * Expose C object.
+   */
+  static get C()
+  {
+    return C;
+  }
+
+  get C()
+  {
+    return C;
+  }
+
+  /**
+   * @param {UA} ua - reference to JsSIP.UA
+   * @param {string} target
+   * @param {string} eventName - Event header value. May end with optional ;id=xxx
+   * @param {string} accept - Accept header value.
+   *
+   * @param {SubscriberOption} options - optional parameters.
+   *   @param {number} expires - Expires header value. Default is 900.
+   *   @param {string} contentType - Content-Type header value. Used for SUBSCRIBE with body
+   *   @param {string} allowEvents - Allow-Events header value.
+   *   @param {RequestParams} params - Will have priority over ua.configuration.
+   *      If set please define: to_uri, to_display_name, from_uri, from_display_name
+   *   @param {Array<string>} extraHeaders - Additional SIP headers.
+   */
+  constructor(ua, target, eventName, accept, { expires, contentType,
+    allowEvents, params, extraHeaders })
+  {
+    logger.debug('new');
+
+    super();
+
+    // Check that arguments are defined
+    if (!target)
+    {
+      throw new TypeError('target is undefined');
+    }
+
+    if (!eventName)
+    {
+      throw new TypeError('eventName is undefined');
+    }
+
+    if (!accept)
+    {
+      throw new TypeError('accept is undefined');
+    }
+
+    this._ua = ua;
+    this._target = target;
+
+    if (expires !== 0 && !expires)
+    {
+      expires = 900;
+    }
+
+    this._expires = expires;
+
+    // Used to subscribe with body.
+    this._content_type = contentType;
+
+    // Set initial subscribe parameters.
+    this._params = Utils.cloneObject(params);
+
+    if (!this._params.from_uri)
+    {
+      this._params.from_uri = this._ua.configuration.uri;
+    }
+
+    this._params.from_tag = Utils.newTag();
+    this._params.to_tag = null;
+    this._params.call_id = Utils.createRandomToken(20);
+
+    // Create subscribe cseq if not defined custom cseq.
+    if (this._params.cseq === undefined)
+    {
+      this._params.cseq = Math.floor((Math.random() * 10000) + 1);
+    }
+
+    // Subscriber state.
+    this._state = C.STATE_INIT;
+
+    // Dialog
+    this._dialog = null;
+
+    // To refresh subscription.
+    this._expires_timer = null;
+    this._expires_timestamp = null;
+
+    // To prevent duplicate terminated call.
+    this._terminated = false;
+
+    // After send un-subscribe wait final notify limited time.
+    this._unsubscribe_timeout_timer = null;
+
+    // Custom session empty object for high level use.
+    this.data = {};
+
+    const parsed = Grammar.parse(eventName, 'Event');
+
+    if (parsed === -1)
+    {
+      throw new TypeError('eventName - wrong format');
+    }
+
+    this._event_name = parsed.event;
+    this._event_id = parsed.params && parsed.params.id;
+
+    let eventValue = this._event_name;
+
+    if (this._event_id)
+    {
+      eventValue += `;id=${this._event_id}`;
+    }
+
+    this._headers = Utils.cloneArray(extraHeaders);
+    this._headers = this._headers.concat([
+      `Event: ${eventValue}`,
+      `Expires: ${this._expires}`,
+      `Accept: ${accept}`
+    ]);
+
+    if (!this._headers.find((header) => header.startsWith('Contact')))
+    {
+
+      const contact = `Contact: ${this._ua._contact.toString()}`;
+
+      this._headers.push(contact);
+    }
+
+    if (allowEvents)
+    {
+      this._headers.push(`Allow-Events: ${allowEvents}`);
+    }
+
+    // To enqueue subscribes created before receive initial subscribe OK.
+    this._queue = [];
+  }
+
+  onRequestTimeout()
+  {
+    this._dialogTerminated(C.SUBSCRIBE_RESPONSE_TIMEOUT);
+  }
+
+  onTransportError()
+  {
+    this._dialogTerminated(C.SUBSCRIBE_TRANSPORT_ERROR);
+  }
+
+  /**
+   * Dialog callback.
+   */
+  receiveRequest(request)
+  {
+    if (request.method !== JsSIP_C.NOTIFY)
+    {
+      logger.warn('received non-NOTIFY request');
+      request.reply(405);
+
+      return;
+    }
+
+    // RFC 6665 8.2.1. Check if event header matches.
+    const event_header = request.parseHeader('Event');
+
+    if (!event_header)
+    {
+      logger.warn('missed Event header');
+      request.reply(400);
+      this._dialogTerminated(C.RECEIVE_BAD_NOTIFY);
+
+      return;
+    }
+
+    const event_name = event_header.event;
+    const event_id = event_header.params && event_header.params.id;
+
+    if (event_name !== this._event_name || event_id !== this._event_id)
+    {
+      logger.warn('Event header does not match SUBSCRIBE');
+      request.reply(489);
+      this._dialogTerminated(C.RECEIVE_BAD_NOTIFY);
+
+      return;
+    }
+
+    // Process Subscription-State header.
+    const subs_state = request.parseHeader('subscription-state');
+
+    if (!subs_state)
+    {
+      logger.warn('missed Subscription-State header');
+      request.reply(400);
+      this._dialogTerminated(C.RECEIVE_BAD_NOTIFY);
+
+      return;
+    }
+
+    request.reply(200);
+
+    const new_state = this._stateStringToNumber(subs_state.state);
+    const prev_state = this._state;
+
+    if (prev_state !== C.STATE_TERMINATED && new_state !== C.STATE_TERMINATED)
+    {
+      this._state = new_state;
+
+      if (subs_state.expires !== undefined)
+      {
+        const expires = subs_state.expires;
+        const expires_timestamp = new Date().getTime() + (expires * 1000);
+        const max_time_deviation = 2000;
+
+        // Expiration time is shorter and the difference is not too small.
+        if (this._expires_timestamp - expires_timestamp > max_time_deviation)
+        {
+          logger.debug('update sending re-SUBSCRIBE time');
+
+          this._scheduleSubscribe(expires);
+        }
+      }
+    }
+
+    if (prev_state !== C.STATE_PENDING && new_state === C.STATE_PENDING)
+    {
+      logger.debug('emit "pending"');
+      this.emit('pending');
+    }
+    else if (prev_state !== C.STATE_ACTIVE && new_state === C.STATE_ACTIVE)
+    {
+      logger.debug('emit "active"');
+      this.emit('active');
+    }
+
+    const body = request.body;
+
+    // Check if the notify is final.
+    const is_final = new_state === C.STATE_TERMINATED;
+
+    // Notify event fired only for notify with body.
+    if (body)
+    {
+      const content_type = request.getHeader('content-type');
+
+      logger.debug('emit "notify"');
+      this.emit('notify', is_final, request, body, content_type);
+    }
+
+    if (is_final)
+    {
+      const reason = subs_state.reason;
+      let retry_after = undefined;
+
+      if (subs_state.params && subs_state.params['retry-after'] !== undefined)
+      {
+        retry_after = parseInt(subs_state.params['retry-after']);
+      }
+
+      this._dialogTerminated(C.RECEIVE_FINAL_NOTIFY, reason, retry_after);
+    }
+  }
+
+  /**
+   * User API
+   */
+
+  /**
+   * Send the initial (non-fetch)  and subsequent subscribe.
+   * @param {string} body - subscribe request body.
+   */
+  subscribe(body = null)
+  {
+    logger.debug('subscribe()');
+
+    if (this._state === C.STATE_INIT)
+    {
+      this._sendInitialSubscribe(body, this._headers);
+    }
+    else
+    {
+      this._sendSubsequentSubscribe(body, this._headers);
+    }
+  }
+
+  /**
+   * terminate.
+   * Send un-subscribe or fetch-subscribe (with Expires: 0).
+   * @param {string} body - un-subscribe request body
+   */
+  terminate(body = null)
+  {
+    logger.debug('terminate()');
+
+    // Prevent duplication un-subscribe sending.
+    if (this._terminated)
+    {
+
+      return;
+    }
+    this._terminated = true;
+
+    // Set header Expires: 0.
+    const headers = this._headers.map((header) =>
+    {
+      return header.startsWith('Expires') ? 'Expires: 0' : header;
+    });
+
+    if (this._state === C.STATE_INIT)
+    {
+      // fetch-subscribe - initial subscribe with Expires: 0.
+      this._sendInitialSubscribe(body, headers);
+    }
+    else
+    {
+      this._sendSubsequentSubscribe(body, headers);
+    }
+
+    // Waiting for the final notify for a while.
+    const final_notify_timeout = 30000;
+
+    this._unsubscribe_timeout_timer = setTimeout(() =>
+    {
+      this._dialogTerminated(C.UNSUBSCRIBE_TIMEOUT);
+    }, final_notify_timeout);
+  }
+
+  /**
+   * Get dialog state.
+   */
+  get state()
+  {
+    return this._state;
+  }
+
+  /**
+   * Get dialog id.
+   */
+  get id()
+  {
+    return this._dialog ? this._dialog.id : null;
+  }
+
+  /**
+   * Private API.
+   */
+  _sendInitialSubscribe(body, headers)
+  {
+    if (body)
+    {
+      if (!this._content_type)
+      {
+        throw new TypeError('content_type is undefined');
+      }
+
+      headers = headers.slice();
+      headers.push(`Content-Type: ${this._content_type}`);
+    }
+
+    this._state = C.STATE_NOTIFY_WAIT;
+
+    const request = new SIPMessage.OutgoingRequest(JsSIP_C.SUBSCRIBE,
+      this._ua.normalizeTarget(this._target), this._ua, this._params, headers, body);
+
+    const request_sender = new RequestSender(this._ua, request, {
+      onRequestTimeout : () =>
+      {
+        this.onRequestTimeout();
+      },
+      onTransportError : () =>
+      {
+        this.onTransportError();
+      },
+      onReceiveResponse : (response) =>
+      {
+        this._receiveSubscribeResponse(response);
+      }
+    });
+
+    request_sender.send();
+  }
+
+  _receiveSubscribeResponse(response)
+  {
+    if (response.status_code >= 200 && response.status_code < 300)
+    {
+      // Create dialog
+      if (this._dialog === null)
+      {
+        const dialog = new Dialog(this, response, 'UAC');
+
+        if (dialog.error)
+        {
+          // OK response without Contact
+          logger.warn(dialog.error);
+          this._dialogTerminated(C.SUBSCRIBE_BAD_OK_RESPONSE);
+
+          return;
+        }
+
+        this._dialog = dialog;
+
+        logger.debug('emit "accepted"');
+        this.emit('accepted');
+
+        // Subsequent subscribes saved in the queue until dialog created.
+        for (const subscribe of this._queue)
+        {
+          logger.debug('dequeue subscribe');
+
+          this._sendSubsequentSubscribe(subscribe.body, subscribe.headers);
+        }
+      }
+
+      // Check expires value.
+      let expires_value = response.getHeader('expires');
+
+      if (expires_value !== 0 && !expires_value)
+      {
+        logger.warn('response without Expires header');
+
+        // RFC 6665 3.1.1 subscribe OK response must contain Expires header.
+        // Use workaround expires value.
+        expires_value = '900';
+      }
+
+      const expires = parseInt(expires_value);
+
+      if (expires > 0)
+      {
+        this._scheduleSubscribe(expires);
+      }
+    }
+    else if (response.status_code === 401 || response.status_code === 407)
+    {
+      this._dialogTerminated(C.SUBSCRIBE_FAILED_AUTHENTICATION);
+    }
+    else if (response.status_code >= 300)
+    {
+      this._dialogTerminated(C.SUBSCRIBE_NON_OK_RESPONSE);
+    }
+  }
+
+  _sendSubsequentSubscribe(body, headers)
+  {
+    if (this._state === C.STATE_TERMINATED)
+    {
+      return;
+    }
+
+    if (!this._dialog)
+    {
+      logger.debug('enqueue subscribe');
+
+      this._queue.push({ body, headers: headers.slice() });
+
+      return;
+    }
+
+    if (body)
+    {
+      if (!this._content_type)
+      {
+        throw new TypeError('content_type is undefined');
+      }
+
+      headers = headers.slice();
+      headers.push(`Content-Type: ${this._content_type}`);
+    }
+
+    this._dialog.sendRequest(JsSIP_C.SUBSCRIBE, {
+      body,
+      extraHeaders  : headers,
+      eventHandlers : {
+        onRequestTimeout : () =>
+        {
+          this.onRequestTimeout();
+        },
+        onTransportError : () =>
+        {
+          this.onTransportError();
+        },
+        onSuccessResponse : (response) =>
+        {
+          this._receiveSubscribeResponse(response);
+        },
+        onErrorResponse : (response) =>
+        {
+          this._receiveSubscribeResponse(response);
+        },
+        onDialogError : (response) =>
+        {
+          this._receiveSubscribeResponse(response);
+        }
+      }
+    });
+  }
+
+  _dialogTerminated(terminationCode, reason = undefined, retryAfter = undefined)
+  {
+    // To prevent duplicate emit terminated event.
+    if (this._state === C.STATE_TERMINATED)
+    {
+      return;
+    }
+
+    this._state = C.STATE_TERMINATED;
+
+    // Clear timers.
+    clearTimeout(this._expires_timer);
+    clearTimeout(this._unsubscribe_timeout_timer);
+
+    if (this._dialog)
+    {
+      this._dialog.terminate();
+      this._dialog = null;
+    }
+
+    logger.debug(`emit "terminated" code=${terminationCode}`);
+    this.emit('terminated', terminationCode, reason, retryAfter);
+  }
+
+  _scheduleSubscribe(expires)
+  {
+    /*
+      If the expires time is less than 140 seconds we do not support Chrome intensive timer throttling mode.
+      In this case, the re-subcribe is sent 5 seconds before the subscription expiration.
+
+      When Chrome is in intensive timer throttling mode, in the worst case,
+	  the timer will be 60 seconds late.
+      We give the server 10 seconds to make sure it will execute the command even if it is heavily loaded.
+      As a result, we order the time no later than 70 seconds before the subscription expiration.
+      Resulting time calculated as half time interval + (half interval - 70) * random.
+
+      E.g. expires is 140, re-subscribe will be ordered to send in 70 seconds.
+	       expires is 600, re-subscribe will be ordered to send in 300 + (0 .. 230) seconds.
+	 */
+
+    const timeout = expires >= 140 ? (expires * 1000 / 2)
+     + Math.floor(((expires / 2) - 70) * 1000 * Math.random()) : (expires * 1000) - 5000;
+
+    this._expires_timestamp = new Date().getTime() + (expires * 1000);
+
+    logger.debug(`next SUBSCRIBE will be sent in ${Math.floor(timeout / 1000)} sec`);
+
+    clearTimeout(this._expires_timer);
+    this._expires_timer = setTimeout(() =>
+    {
+      this._expires_timer = null;
+      this._sendSubsequentSubscribe(null, this._headers);
+    }, timeout);
+  }
+
+  _stateStringToNumber(strState)
+  {
+    switch (strState)
+    {
+      case 'pending': return C.STATE_PENDING;
+      case 'active': return C.STATE_ACTIVE;
+      case 'terminated': return C.STATE_TERMINATED;
+      case 'init': return C.STATE_INIT;
+      case 'notify_wait': return C.STATE_NOTIFY_WAIT;
+      default: throw new TypeError('wrong state value');
+    }
+  }
+};
diff --git a/lib/Transport.js b/lib/Transport.js
index 33018e74d..52c6f1508 100644
--- a/lib/Transport.js
+++ b/lib/Transport.js
@@ -340,7 +340,25 @@ module.exports = class Transport
 
   _onData(data)
   {
-    // CRLF Keep Alive response from server. Ignore it.
+    // CRLF Keep Alive request from server, reply.
+    if (data === '\r\n\r\n')
+    {
+      logger.debug('received message with double-CRLF Keep Alive request');
+
+      try
+      {
+        // Reply with single CRLF.
+        this.socket.send('\r\n');
+      }
+      catch (error)
+      {
+        logger.warn(`error sending Keep Alive response: ${error}`);
+      }
+
+      return;
+    }
+
+    // CRLF Keep Alive response from server, ignore it.
     if (data === '\r\n')
     {
       logger.debug('received message with CRLF Keep Alive response');
diff --git a/lib/UA.d.ts b/lib/UA.d.ts
index b7db28e83..de64cca3a 100644
--- a/lib/UA.d.ts
+++ b/lib/UA.d.ts
@@ -1,10 +1,12 @@
-import {EventEmitter, Listener} from 'events'
+import {EventEmitter} from 'events'
 
 import {Socket, WeightedSocket} from './Socket'
 import {AnswerOptions, Originator, RTCSession, RTCSessionEventMap, TerminateOptions} from './RTCSession'
 import {IncomingRequest, IncomingResponse, OutgoingRequest} from './SIPMessage'
 import {Message, SendMessageOptions} from './Message'
 import {Registrator} from './Registrator'
+import {Notifier} from './Notifier'
+import {Subscriber} from './Subscriber'
 import {URI} from './URI'
 import {causes} from './Constants'
 
@@ -40,6 +42,7 @@ export interface UAConfiguration {
   ha1?: string;
   register?: boolean;
   register_expires?: number;
+  register_from_tag_trail?: string | function() : string;
   registrar_server?: string;
   use_preloaded_route?: boolean;
   user_agent?: string;
@@ -113,6 +116,7 @@ export type DisconnectedListener = (event: DisconnectEvent) => void;
 export type RegisteredListener = (event: RegisteredEvent) => void;
 export type UnRegisteredListener = (event: UnRegisteredEvent) => void;
 export type RegistrationFailedListener = UnRegisteredListener;
+export type RegistrationExpiringListener = () => void;
 export type IncomingRTCSessionListener = (event: IncomingRTCSessionEvent) => void;
 export type OutgoingRTCSessionListener = (event: OutgoingRTCSessionEvent) => void;
 export type RTCSessionListener = IncomingRTCSessionListener | OutgoingRTCSessionListener;
@@ -123,6 +127,7 @@ export type IncomingOptionsListener = (event: IncomingOptionsEvent) => void;
 export type OutgoingOptionsListener = (event: OutgoingOptionsEvent) => void;
 export type OptionsListener = IncomingOptionsListener | OutgoingOptionsListener;
 export type SipEventListener = <T = any>(event: { event: T; request: IncomingRequest; }) => void
+export type SipSubscribeListener = <T = any>(event: { event: T; request: IncomingRequest; }) => void
 
 export interface UAEventMap {
   connecting: ConnectingListener;
@@ -131,10 +136,11 @@ export interface UAEventMap {
   registered: RegisteredListener;
   unregistered: UnRegisteredListener;
   registrationFailed: RegistrationFailedListener;
-  registrationExpiring: Listener;
+  registrationExpiring: RegistrationExpiringListener;
   newRTCSession: RTCSessionListener;
   newMessage: MessageListener;
   sipEvent: SipEventListener;
+  newSubscribe: SipSubscribeListener;
   newOptions: OptionsListener;
 }
 
@@ -151,6 +157,38 @@ export interface UAContact {
   toString(options?: UAContactOptions): string
 }
 
+export interface RequestParams {
+  from_uri: URI;
+  from_display_name?: string;
+  from_tag: string;
+  to_uri: URI;
+  to_display_name?: string;
+  to_tag?: string;
+  call_id: string;
+  cseq: number;
+}
+
+export interface SubscriberParams {
+  from_uri: URI;
+  from_display_name?: string;
+  to_uri: URI;
+  to_display_name?: string;
+}
+
+export interface SubscriberOptions {
+  expires?: number;
+  contentType?: string;
+  allowEvents?: string;
+  params?: SubscriberParams;
+  extraHeaders?: string[];
+}
+
+export interface NotifierOptions {
+  allowEvents?: string;
+  extraHeaders?: string[];
+  pending?: boolean;
+}
+
 declare enum UAStatus {
   // UA status codes.
   STATUS_INIT = 0,
@@ -187,6 +225,10 @@ export class UA extends EventEmitter {
 
   sendMessage(target: string | URI, body: string, options?: SendMessageOptions): Message;
 
+  subscribe(target: string, eventName: string, accept: string, options?: SubscriberOptions): Subscriber;
+
+  notify( subscribe: IncomingRequest, contentType: string, options?: NotifierOptions): Notifier;
+
   terminateSessions(options?: TerminateOptions): void;
 
   isRegistered(): boolean;
diff --git a/lib/UA.js b/lib/UA.js
index fa26c2183..6597b627f 100644
--- a/lib/UA.js
+++ b/lib/UA.js
@@ -3,6 +3,8 @@ const Logger = require('./Logger');
 const JsSIP_C = require('./Constants');
 const Registrator = require('./Registrator');
 const RTCSession = require('./RTCSession');
+const Subscriber = require('./Subscriber');
+const Notifier = require('./Notifier');
 const Message = require('./Message');
 const Options = require('./Options');
 const Transactions = require('./Transactions');
@@ -257,6 +259,26 @@ module.exports = class UA extends EventEmitter
     return message;
   }
 
+  /**
+   * Create subscriber instance
+   */
+  subscribe(target, eventName, accept, options)
+  {
+    logger.debug('subscribe()');
+
+    return new Subscriber(this, target, eventName, accept, options);
+  }
+
+  /**
+   * Create notifier instance
+   */
+  notify(subscribe, contentType, options)
+  {
+    logger.debug('notify()');
+
+    return new Notifier(this, subscribe, contentType, options);
+  }
+
   /**
    * Send a SIP OPTIONS.
    *
@@ -435,6 +457,11 @@ module.exports = class UA extends EventEmitter
         break;
       }
 
+      case 'extra_headers': {
+        this._configuration.extra_headers = value;
+        break;
+      }
+
       default:
         logger.warn('set() | cannot set "%s" parameter in runtime', parameter);
 
@@ -635,6 +662,15 @@ module.exports = class UA extends EventEmitter
 
       message.init_incoming(request);
     }
+    else if (method === JsSIP_C.SUBSCRIBE)
+    {
+      if (this.listeners('newSubscribe').length === 0)
+      {
+        request.reply(405);
+
+        return;
+      }
+    }
     else if (method === JsSIP_C.INVITE)
     {
       // Initial INVITE.
@@ -721,6 +757,12 @@ module.exports = class UA extends EventEmitter
           });
           request.reply(200);
           break;
+        case JsSIP_C.SUBSCRIBE:
+          this.emit('newSubscribe', {
+            event : request.event,
+            request
+          });
+          break;
         default:
           request.reply(405);
           break;
@@ -942,7 +984,7 @@ module.exports = class UA extends EventEmitter
 
     // Seal the configuration.
     const writable_parameters = [
-      'authorization_user', 'password', 'realm', 'ha1', 'authorization_jwt', 'display_name', 'register'
+      'authorization_user', 'password', 'realm', 'ha1', 'authorization_jwt', 'display_name', 'register', 'extra_headers'
     ];
 
     for (const parameter in this._configuration)
diff --git a/package.json b/package.json
index 963e68f30..4e65305a1 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "jssip",
   "title": "JsSIP",
   "description": "the Javascript SIP library",
-  "version": "3.10.0",
+  "version": "3.10.1",
   "homepage": "https://jssip.net",
   "contributors": [
     "José Luis Millán <jmillan@aliax.net> (https://github.com/jmillan)",
diff --git a/test/include/loopSocket.js b/test/include/loopSocket.js
new file mode 100644
index 000000000..9a92d9a21
--- /dev/null
+++ b/test/include/loopSocket.js
@@ -0,0 +1,48 @@
+// LoopSocket send message itself.
+// Used P2P logic: message call-id is modified in each leg.
+module.exports = class LoopSocket
+{
+  constructor()
+  {
+    this.url = 'ws://localhost:12345';
+    this.via_transport = 'WS';
+    this.sip_uri = 'sip:localhost:12345;transport=ws';
+  }
+
+  connect()
+  {
+    setTimeout(() => { this.onconnect(); }, 0);
+  }
+
+  disconnect()
+  {
+  }
+
+  send(message)
+  {
+    const message2 = this._modifyCallId(message);
+
+    setTimeout(() => { this.ondata(message2); }, 0);
+
+    return true;
+  }
+
+  // Call-ID: add or drop word '_second'.
+  _modifyCallId(message)
+  {
+    const ixBegin = message.indexOf('Call-ID');
+    const ixEnd = message.indexOf('\r', ixBegin);
+    let callId = message.substring(ixBegin+9, ixEnd);
+
+    if (callId.endsWith('_second'))
+    {
+      callId = callId.substring(0, callId.length - 7);
+    }
+    else
+    {
+      callId += '_second';
+    }
+
+    return `${message.substring(0, ixBegin)}Call-ID: ${callId}${message.substring(ixEnd)}`;
+  }
+};
diff --git a/test/test-UA-subscriber-notifier.js b/test/test-UA-subscriber-notifier.js
new file mode 100644
index 000000000..e9a82a378
--- /dev/null
+++ b/test/test-UA-subscriber-notifier.js
@@ -0,0 +1,179 @@
+/* eslint no-console: 0*/
+
+require('./include/common');
+const JsSIP = require('../');
+const LoopSocket = require('./include/LoopSocket');
+
+module.exports = {
+  'subscriber/notifier communication' : function(test)
+  {
+    test.expect(39);
+
+    let eventSequence = 0;
+
+    const TARGET = 'ikq';
+    const REQUEST_URI = 'sip:ikq@example.com';
+    const CONTACT_URI = 'sip:ikq@abcdefabcdef.invalid;transport=ws';
+    const SUBSCRIBE_ACCEPT = 'application/text, text/plain';
+    const EVENT_NAME = 'weather';
+    const CONTENT_TYPE = 'text/plain';
+    const WEATHER_REQUEST = 'Please report the weather condition';
+    const WEATHER_REPORT = '+20..+24°C, no precipitation, light wind';
+
+    function createSubscriber(ua)
+    {
+      const options = {
+        expires     : 3600,
+        contentType : CONTENT_TYPE,
+        params      : null
+      };
+
+      const subscriber = ua.subscribe(TARGET, EVENT_NAME, SUBSCRIBE_ACCEPT, options);
+
+      subscriber.on('active', () =>
+      {
+        test.ok(++eventSequence === 6, 'receive notify with subscription-state: active');
+      });
+
+      subscriber.on('notify', (isFinal, notify, body, contType) =>
+      {
+        eventSequence++;
+        test.ok(eventSequence === 7 || eventSequence === 11, 'receive notify');
+
+        test.strictEqual(notify.method, 'NOTIFY');
+        test.strictEqual(notify.getHeader('contact'), `<${CONTACT_URI}>`, 'notify contact');
+        test.strictEqual(body, WEATHER_REPORT, 'notify body');
+        test.strictEqual(contType, CONTENT_TYPE, 'notify content-type');
+
+        const subsState = notify.parseHeader('subscription-state').state;
+
+        test.ok(subsState === 'pending' || subsState === 'active' || subsState === 'terminated', 'notify subscription-state');
+
+        // After receiving the first notify, send un-subscribe.
+        if (eventSequence === 7)
+        {
+          test.ok(++eventSequence === 8, 'send un-subscribe');
+
+          subscriber.terminate(WEATHER_REQUEST);
+        }
+      });
+
+      subscriber.on('terminated', (terminationCode, reason, retryAfter) =>
+      {
+        test.ok(++eventSequence === 12, 'subscriber terminated');
+        test.ok(terminationCode === subscriber.C.RECEIVE_FINAL_NOTIFY);
+        test.ok(reason === undefined);
+        test.ok(retryAfter === undefined);
+
+        ua.stop();
+
+        test.done();
+      });
+
+      subscriber.on('accepted', () =>
+      {
+        test.ok(++eventSequence === 5, 'initial subscribe accepted');
+      });
+
+      test.ok(++eventSequence === 2, 'send subscribe');
+
+      subscriber.subscribe(WEATHER_REQUEST);
+    }
+
+    function createNotifier(ua, subscribe)
+    {
+      const notifier = ua.notify(subscribe, CONTENT_TYPE, { pending: false });
+
+      // Receive subscribe (includes initial)
+      notifier.on('subscribe', (isUnsubscribe, subs, body, contType) =>
+      {
+        test.strictEqual(subscribe.method, 'SUBSCRIBE');
+        test.strictEqual(subscribe.getHeader('contact'), `<${CONTACT_URI}>`, 'subscribe contact');
+        test.strictEqual(subscribe.getHeader('accept'), SUBSCRIBE_ACCEPT, 'subscribe accept');
+        test.strictEqual(body, WEATHER_REQUEST, 'subscribe body');
+        test.strictEqual(contType, CONTENT_TYPE, 'subscribe content-type');
+
+        if (isUnsubscribe)
+        {
+          test.ok(++eventSequence === 9, 'receive un-subscribe, send final notify');
+
+          notifier.terminate(WEATHER_REPORT);
+        }
+        else
+        {
+          test.ok(++eventSequence === 4, 'receive subscribe, send notify');
+
+          notifier.notify(WEATHER_REPORT);
+        }
+      });
+
+      notifier.on('terminated', (terminationCode, sendFinalNotify) =>
+      {
+        test.ok(++eventSequence === 10, 'notifier terminated');
+        test.ok(!sendFinalNotify, 'final notify sending if subscription expired');
+
+        if (sendFinalNotify)
+        {
+          notifier.terminate(WEATHER_REPORT, 'timeout');
+        }
+      });
+
+      notifier.start();
+    }
+
+    // Start JsSIP UA with loop socket.
+    const config =
+    {
+      sockets     : new LoopSocket(), // message sending itself, with modified Call-ID
+      uri         : REQUEST_URI,
+      contact_uri : CONTACT_URI,
+      register    : false
+    };
+
+    const ua = new JsSIP.UA(config);
+
+    // Uncomment to see SIP communication
+    // JsSIP.debug.enable('JsSIP:*');
+
+    ua.on('newSubscribe', (e) =>
+    {
+      test.ok(++eventSequence === 3, 'receive initial subscribe');
+
+      const subs = e.request;
+      const ev = subs.parseHeader('event');
+
+      test.strictEqual(subs.ruri.toString(), REQUEST_URI, 'initial subscribe uri');
+      test.strictEqual(ev.event, EVENT_NAME, 'subscribe event');
+
+      if (ev.event !== EVENT_NAME)
+      {
+        subs.reply(489); // "Bad Event"
+
+        return;
+      }
+
+      const accepts = subs.getHeaders('accept');
+      const canUse = accepts && accepts.some((v) => v.includes(CONTENT_TYPE));
+
+      test.ok(canUse, 'notifier can use subscribe accept header');
+
+      if (!canUse)
+      {
+        subs.reply(406); // "Not Acceptable"
+
+        return;
+      }
+
+      createNotifier(ua, subs);
+    });
+
+    ua.on('connected', () =>
+    {
+      test.ok(++eventSequence === 1, 'socket connected');
+
+      createSubscriber(ua);
+    });
+
+    ua.start();
+  }
+};