failure parsing OPTIONS message

[davehorton]

I've seen this from time to time

Error: failed to parse sip message
    at new SipMessage (/home/admin/apps/sbc-sip-sidecar/node_modules/drachtio-srf/lib/sip-parser/message.js:13:25)
    at DrachtioAgent._onMsg (/home/admin/apps/sbc-sip-sidecar/node_modules/drachtio-srf/lib/drachtio-agent.js:555:20)
    at WireProtocol.emit (node:events:527:28)
    at WireProtocol.emit (node:domain:475:12)
    at WireProtocol.processMessageBuffer (/home/admin/apps/sbc-sip-sidecar/node_modules/drachtio-srf/lib/wire-protocol.js:270:12)
    at WireProtocol._onData (/home/admin/apps/sbc-sip-sidecar/node_modules/drachtio-srf/lib/wire-protocol.js:304:14)
    at Socket.emit (node:events:527:28)
    at Socket.emit (node:domain:475:12)
    at addChunk (node:internal/streams/readable:315:12)
    at readableAddChunk (node:internal/streams/readable:285:11) unable to parse incoming message: OPTIONS sip:[email protected] SIP/2.0^M
Via: SIP/2.0/UDP 192.241.204.38:32836;branch=DGWKZR.0879634396;rport=32836;alias^M
From: sip:[email protected]:32836;tag=79133487^M
To: sip:[email protected]^M
Call-ID: [email protected]^M
CSeq: 1 OPTIONS^M
Contact: sip:[email protected]:32836^M
Content-Length: 0^M
Max-Forwards: 20^M
User-Agent: rkNLoahi^M
Accept: text/plain^M
^M

[davehorton]

This is probably an issue with the underlying drachtio-srf library, since that is the code that is actually failing to parse the incoming message. However, I would suggest we proceed in the following fashion:

• first, create a new test case in this repo, which sends that specific OPTIONS message (it can be copied from above, and a new sipp scenario file can be created from it under /test/scenarios)
• verify that the test case fails currently -- it should fail with the above parsing error
• now dive into the drachtio-srf code and figure out why the parser there is having trouble with it
• submit a PR to drachtio server with a fix and a test case
• after acceptance, update this project to use the new drachtio-srf release, verify the test case created in step 1 now works

[vcidst]

Looks similar to drachtio/drachtio-srf#122