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pdns.c
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pdns.c
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/*
* Copyright (c) 2014-2021 by Farsight Security, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* asprintf() does not appear on linux without this */
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/wait.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include "asinfo.h"
#include "defs.h"
#include "netio.h"
#include "ns_ttl.h"
#include "pdns.h"
#include "time.h"
#include "tokstr.h"
#include "globals.h"
static void present_text_line(const char *, const char *, const char *);
static void present_csv_line(pdns_tuple_ct, const char *);
static void present_minimal_thing(const char *thing);
static void present_json(pdns_tuple_ct, query_ct, bool);
static json_t *annotate_json(pdns_tuple_ct, query_ct, bool);
static json_t *annotation_json(query_ct query, json_t *annoRD);
static json_t *annotate_one(json_t *, const char *, const char *, json_t *);
#ifndef CRIPPLED_LIBC
static json_t *annotate_asinfo(const char *, const char *);
#endif
static struct counted *countoff_r(const char *, int);
/* present_text_lookup -- render one pdns tuple in "dig" style ascii text.
*/
void
present_text_lookup(pdns_tuple_ct tup,
query_ct query __attribute__ ((unused)),
writer_t writer __attribute__ ((unused)))
{
bool pflag, ppflag;
const char *prefix;
ppflag = false;
/* Timestamps. */
if (tup->obj.time_first != NULL && tup->obj.time_last != NULL) {
char duration[50];
if (ns_format_ttl(tup->time_last - tup->time_first + 1, //non-0
duration, sizeof duration) < 0)
strcpy(duration, "?");
printf(";; record times: %s",
time_str(tup->time_first, iso8601));
printf(" .. %s (%s)\n",
time_str(tup->time_last, iso8601),
duration);
ppflag = true;
}
if (tup->obj.zone_first != NULL && tup->obj.zone_last != NULL) {
char duration[50];
if (ns_format_ttl(tup->zone_last - tup->zone_first, // no +1
duration, sizeof duration) < 0)
strcpy(duration, "?");
printf(";; zone times: %s",
time_str(tup->zone_first, iso8601));
printf(" .. %s (%s)\n",
time_str(tup->zone_last, iso8601),
duration);
ppflag = true;
}
/* Count and Bailiwick. */
prefix = ";;";
pflag = false;
if (tup->obj.count != NULL) {
printf("%s count: %lld", prefix, (long long)tup->count);
prefix = ";";
pflag = true;
ppflag = true;
}
if (tup->obj.bailiwick != NULL) {
printf("%s bailiwick: %s", prefix, tup->bailiwick);
prefix = NULL;
pflag = true;
ppflag = true;
}
if (pflag)
putchar('\n');
/* Records. */
if (json_is_array(tup->obj.rdata)) {
size_t index;
json_t *rr;
json_array_foreach(tup->obj.rdata, index, rr) {
const char *rdata = NULL;
if (json_is_string(rr))
rdata = json_string_value(rr);
else
rdata = "[bad value]";
present_text_line(tup->rrname, tup->rrtype, rdata);
ppflag = true;
}
} else {
present_text_line(tup->rrname, tup->rrtype, tup->rdata);
ppflag = true;
}
/* Cleanup. */
if (ppflag)
putchar('\n');
}
/* present_text_line -- render one RR in "dig" style ascii text.
*/
static void
present_text_line(const char *rrname, const char *rrtype, const char *rdata) {
char *asnum = NULL, *cidr = NULL, *comment = NULL, *result = NULL;
#ifndef CRIPPLED_LIBC
result = asinfo_from_rr(rrtype, rdata, &asnum, &cidr);
#endif
if (result != NULL) {
comment = result;
result = NULL;
} else if (asnum != NULL && cidr != NULL) {
const char *src = asnum;
bool wordbreak = true;
char ch, *dst;
dst = comment = malloc(strlen(asnum) * 3 + strlen(cidr) + 1);
while ((ch = *src++) != '\0') {
if (wordbreak) {
*dst++ = 'A';
*dst++ = 'S';
}
*dst++ = ch;
wordbreak = (ch == '\040');
}
*dst++ = '\040';
dst = stpcpy(dst, cidr);
free(asnum);
free(cidr);
}
printf("%s %s %s", rrname, rrtype, rdata);
if (comment != NULL) {
printf(" ; %s", comment);
free(comment);
}
putchar('\n');
}
/* present_text_summ -- render summarize object in "dig" style ascii text.
*/
void
present_text_summarize(pdns_tuple_ct tup,
query_ct query __attribute__ ((unused)),
writer_t writer __attribute__ ((unused)))
{
const char *prefix;
/* Timestamps. */
if (tup->obj.time_first != NULL && tup->obj.time_last != NULL) {
printf(";; record times: %s",
time_str(tup->time_first, iso8601));
printf(" .. %s\n",
time_str(tup->time_last, iso8601));
}
if (tup->obj.zone_first != NULL && tup->obj.zone_last != NULL) {
printf(";; zone times: %s",
time_str(tup->zone_first, iso8601));
printf(" .. %s\n",
time_str(tup->zone_last, iso8601));
putchar('\n');
}
/* Count and Num_Results. */
prefix = ";;";
if (tup->obj.count != NULL) {
printf("%s count: %lld",
prefix, (long long)tup->count);
prefix = ";";
}
if (tup->obj.num_results != NULL) {
printf("%s num_results: %lld",
prefix, (long long)tup->num_results);
prefix = NULL;
}
putchar('\n');
}
/* pprint_json -- pretty-print a JSON buffer after validation.
*
* returns true if could parse the json ok, otherwise returns false.
*/
bool
pprint_json(const char *buf, size_t len, FILE *outf) {
json_error_t error;
json_t *js = json_loadb(buf, len, 0, &error);
if (js == NULL) {
my_logf("JSON parsing error %d:%d: %s %s",
error.line, error.column,
error.text, error.source);
return false;
}
json_dumpf(js, outf, JSON_INDENT(2));
fputc('\n', outf);
json_decref(js);
return true;
}
/* present_json_lookup -- render one DNSDB tuple as newline-separated JSON.
*/
void
present_json_lookup(pdns_tuple_ct tup,
query_ct query __attribute__ ((unused)),
writer_t writer __attribute__ ((unused)))
{
present_json(tup, query, true);
}
/* present_json_summarize -- render one DNSDB tuple as newline-separated JSON.
*/
void
present_json_summarize(pdns_tuple_ct tup,
query_ct query __attribute__ ((unused)),
writer_t writer __attribute__ ((unused)))
{
present_json(tup, query, false);
}
/* present_json -- shared renderer for DNSDB JSON tuples (lookup and summarize)
*/
static void
present_json(pdns_tuple_ct tup, query_ct query, bool rd) {
json_t *copy = annotate_json(tup, query, rd);
if (copy != NULL) {
json_dumpf(copy, stdout, JSON_INDENT(0) | JSON_COMPACT);
json_decref(copy);
} else {
json_dumpf(tup->obj.cof_obj, stdout,
JSON_INDENT(0) | JSON_COMPACT);
}
putchar('\n');
}
/* annotate_json -- create a temporary copy of a tuple; apply transforms.
*/
static json_t *
annotate_json(pdns_tuple_ct tup, query_ct query, bool rd) {
json_t *annoRD = NULL, *annoTF = NULL, *annoTL = NULL,
*annoZF = NULL, *annoZL = NULL;
/* annotate zone first/last? */
if ((transforms & TRANS_DATEFIX) != 0 &&
tup->obj.zone_first != NULL && tup->obj.zone_last != NULL)
{
annoZF = json_string_nocheck(time_str(tup->zone_first,
iso8601));
annoZL = json_string_nocheck(time_str(tup->zone_last,
iso8601));
}
/* annotate time first/last? */
if ((transforms & TRANS_DATEFIX) != 0 &&
tup->obj.time_first != NULL && tup->obj.time_last != NULL)
{
annoTF = json_string_nocheck(time_str(tup->time_first,
iso8601));
annoTL = json_string_nocheck(time_str(tup->time_last,
iso8601));
}
/* annotate rdata? */
if (rd) {
if (json_is_array(tup->obj.rdata)) {
size_t index;
json_t *rr;
json_array_foreach(tup->obj.rdata, index, rr) {
const char *rdata = json_string_value(rr);
json_t *asinfo = NULL;
#ifndef CRIPPLED_LIBC
asinfo = annotate_asinfo(tup->rrtype, rdata);
#endif
if (asinfo != NULL)
annoRD = annotate_one(annoRD, rdata,
"asinfo", asinfo);
}
} else {
json_t *asinfo = NULL;
#ifndef CRIPPLED_LIBC
asinfo = annotate_asinfo(tup->rrtype, tup->rdata);
#endif
if (asinfo != NULL)
annoRD = annotate_one(annoRD, tup->rdata,
"asinfo", asinfo);
}
} //rd?
/* anything annotated? */
if ((annoZF != NULL && annoZL != NULL) ||
(annoTF != NULL && annoTL != NULL) ||
(transforms & (TRANS_REVERSE|TRANS_CHOMP|TRANS_QDETAIL)) != 0 ||
annoRD != NULL)
{
json_t *copy = json_deep_copy(tup->obj.cof_obj);
if (annoZF != NULL || annoZL != NULL) {
json_object_set_new_nocheck(copy, "zone_time_first",
annoZF);
json_object_set_new_nocheck(copy, "zone_time_last",
annoZL);
}
if (annoTF != NULL || annoTL != NULL) {
json_object_set_new_nocheck(copy, "time_first",
annoTF);
json_object_set_new_nocheck(copy, "time_last",
annoTL);
}
if ((transforms & (TRANS_REVERSE|TRANS_CHOMP)) != 0)
json_object_set_new_nocheck(copy, "rrname",
json_string(tup->rrname));
if ((transforms & TRANS_QDETAIL) != 0 || annoRD != NULL) {
json_t *obj = annotation_json(query, annoRD);
if (obj != NULL)
json_object_set_new_nocheck(copy, "_dnsdbq",
obj);
}
return copy;
}
return NULL;
}
static inline void
instantiate_json(json_t **objptr) {
if (*objptr == NULL)
*objptr = json_object();
}
static json_t *
annotation_json(query_ct query, json_t *annoRD) {
json_t *obj = NULL;
if (query != NULL && (transforms & TRANS_QDETAIL) != 0) {
instantiate_json(&obj);
if ((transforms & TRANS_QDETAIL) != 0)
json_object_set_new_nocheck(obj, "descr",
json_string(query->descr));
if (query->qp.after != 0)
json_object_set_new_nocheck(obj, "after",
json_string_nocheck(
time_str(query->qp.after, iso8601)));
if (query->qp.before != 0)
json_object_set_new_nocheck(obj, "before",
json_string_nocheck(
time_str(query->qp.before, iso8601)));
if (query->qp.query_limit != -1)
json_object_set_new_nocheck(obj, "limit",
json_integer((json_int_t)
query->qp.query_limit));
if (query->qp.offset != 0)
json_object_set_new_nocheck(obj, "offset",
json_integer((json_int_t)
query->qp.offset));
json_object_set_new_nocheck(obj, "gravel",
json_boolean(query->qp.gravel));
json_object_set_new_nocheck(obj, "complete",
json_boolean(query->qp.complete));
}
if (annoRD != NULL) {
instantiate_json(&obj);
json_object_set_new_nocheck(obj, "anno", annoRD);
}
return obj;
}
static json_t *
annotate_one(json_t *anno, const char *rdata, const char *name, json_t *obj) {
json_t *this = NULL;
bool new = false;
if (anno == NULL)
anno = json_object();
if ((this = json_object_get(anno, rdata)) == NULL) {
this = json_object();
new = true;
}
json_object_set_new_nocheck(this, name, obj);
if (new)
json_object_set_new_nocheck(anno, rdata, this);
else
json_decref(this);
return anno;
}
#ifndef CRIPPLED_LIBC
static json_t *
annotate_asinfo(const char *rrtype, const char *rdata) {
char *asnum = NULL, *cidr = NULL, *result = NULL;
json_t *asinfo = NULL;
if ((result = asinfo_from_rr(rrtype, rdata, &asnum, &cidr)) != NULL) {
asinfo = json_object();
json_object_set_new_nocheck(asinfo, "comment",
json_string(result));
free(result);
} else if (asnum != NULL && cidr != NULL) {
json_t *array = json_array();
struct tokstr *ts = tokstr_string(asnum);
for (char *t; (t = tokstr_next(ts, "\040")) != NULL; free(t))
json_array_append_new(array, json_integer(atol(t)));
tokstr_last(&ts);
asinfo = json_object();
json_object_set_new_nocheck(asinfo, "as", array);
json_object_set_new_nocheck(asinfo, "cidr", json_string(cidr));
}
DESTROY(asnum);
DESTROY(cidr);
return asinfo;
}
#endif
/* present_csv_lookup -- render one DNSDB tuple as comma-separated values (CSV)
*/
void
present_csv_lookup(pdns_tuple_ct tup,
query_ct query __attribute__ ((unused)),
writer_t writer)
{
if (!writer->csv_headerp) {
printf("time_first,time_last,zone_first,zone_last,"
"count,bailiwick,"
"rrname,rrtype,rdata");
if (asinfo_lookup)
fputs(",asnum,cidr", stdout);
putchar('\n');
writer->csv_headerp = true;
}
if (json_is_array(tup->obj.rdata)) {
size_t index;
json_t *rr;
json_array_foreach(tup->obj.rdata, index, rr) {
const char *rdata = NULL;
if (json_is_string(rr))
rdata = json_string_value(rr);
else
rdata = "[bad value]";
present_csv_line(tup, rdata);
}
} else {
present_csv_line(tup, tup->rdata);
}
}
/* present_csv_line -- display a CSV for one rdatum out of an rrset.
*/
static void
present_csv_line(pdns_tuple_ct tup, const char *rdata) {
/* Timestamps. */
if (tup->obj.time_first != NULL)
printf("\"%s\"", time_str(tup->time_first, iso8601));
putchar(',');
if (tup->obj.time_last != NULL)
printf("\"%s\"", time_str(tup->time_last, iso8601));
putchar(',');
if (tup->obj.zone_first != NULL)
printf("\"%s\"", time_str(tup->zone_first, iso8601));
putchar(',');
if (tup->obj.zone_last != NULL)
printf("\"%s\"", time_str(tup->zone_last, iso8601));
putchar(',');
/* Count and bailiwick. */
if (tup->obj.count != NULL)
printf("%lld", (long long) tup->count);
putchar(',');
if (tup->obj.bailiwick != NULL)
printf("\"%s\"", tup->bailiwick);
putchar(',');
/* Records. */
if (tup->obj.rrname != NULL)
printf("\"%s\"", tup->rrname);
putchar(',');
if (tup->obj.rrtype != NULL)
printf("\"%s\"", tup->rrtype);
putchar(',');
if (tup->obj.rdata != NULL)
printf("\"%s\"", rdata);
if (asinfo_lookup && tup->obj.rrtype != NULL &&
tup->obj.rdata != NULL) {
char *asnum = NULL, *cidr = NULL, *result = NULL;
#ifndef CRIPPLED_LIBC
result = asinfo_from_rr(tup->rrtype, rdata, &asnum, &cidr);
#endif
if (result != NULL) {
asnum = strdup(result);
cidr = result;
result = NULL;
}
putchar(',');
if (asnum != NULL) {
printf("\"%s\"", asnum);
free(asnum);
}
putchar(',');
if (cidr != NULL) {
printf("\"%s\"", cidr);
free(cidr);
}
}
putchar('\n');
}
/* present_minimal_lookup -- render one DNSDB tuple as a "line"
*/
void
present_minimal_lookup(pdns_tuple_ct tup,
query_ct query,
writer_t writer __attribute__ ((unused)))
{
/* here is why this presenter is incompatible with sorting. */
assert(query != NULL);
/* did this tuple come from a left hand or right hand query? */
bool left = true;
switch (query->mode) {
case no_mode:
abort();
case rrset_mode:
/* FALLTHROUGH */
case raw_rrset_mode:
break;
case name_mode:
/* FALLTHROUGH */
case ip_mode:
/* FALLTHROUGH */
case raw_name_mode:
left = false;
}
/* for RHS queries, output the LHS once, and exit. */
if (!left) {
present_minimal_thing(tup->rrname);
return;
}
/* for LHS queries, output each RHS found. */
if (json_is_array(tup->obj.rdata)) {
size_t index;
json_t *rr;
json_array_foreach(tup->obj.rdata, index, rr) {
const char *rdata = NULL;
if (json_is_string(rr))
rdata = json_string_value(rr);
else
rdata = "[bad value]";
present_minimal_thing(rdata);
}
} else {
present_minimal_thing(tup->rdata);
}
}
static void
present_minimal_thing(const char *thing) {
if (!deduper_tas(minimal_deduper, thing))
puts(thing);
}
/* present_csv_summarize -- render a summarize result as CSV.
*/
void
present_csv_summarize(pdns_tuple_ct tup,
query_ct query __attribute__ ((unused)),
writer_t writer __attribute__ ((unused)))
{
printf("time_first,time_last,zone_first,zone_last,"
"count,num_results\n");
/* Timestamps. */
if (tup->obj.time_first != NULL)
printf("\"%s\"", time_str(tup->time_first, iso8601));
putchar(',');
if (tup->obj.time_last != NULL)
printf("\"%s\"", time_str(tup->time_last, iso8601));
putchar(',');
if (tup->obj.zone_first != NULL)
printf("\"%s\"", time_str(tup->zone_first, iso8601));
putchar(',');
if (tup->obj.zone_last != NULL)
printf("\"%s\"", time_str(tup->zone_last, iso8601));
putchar(',');
/* Count and num_results. */
if (tup->obj.count != NULL)
printf("%lld", (long long) tup->count);
putchar(',');
if (tup->obj.num_results != NULL)
printf("%lld", tup->num_results);
putchar('\n');
}
/* tuple_make -- create one DNSDB tuple object out of a JSON object.
*/
const char *
tuple_make(pdns_tuple_t tup, const char *buf, size_t len) {
const char *msg = NULL;
json_error_t error;
memset(tup, 0, sizeof *tup);
DEBUG(4, true, "[%d] '%-*.*s'\n", (int)len, (int)len, (int)len, buf);
tup->obj.main = json_loadb(buf, len, 0, &error);
if (tup->obj.main == NULL) {
my_logf("warning: json_loadb: %d:%d: %s %s",
error.line, error.column,
error.text, error.source);
abort();
}
if (debug_level >= 4) {
char *pretty = json_dumps(tup->obj.main, JSON_INDENT(2));
my_logf("%s", pretty);
free(pretty);
}
switch (psys->encap) {
case encap_cof:
/* the COF just is the JSON object. */
tup->obj.cof_obj = tup->obj.main;
break;
case encap_saf:
/* the COF is embedded in the JSONL object. */
tup->obj.saf_cond = json_object_get(tup->obj.main, "cond");
if (tup->obj.saf_cond != NULL) {
if (!json_is_string(tup->obj.saf_cond)) {
msg = "cond must be a string";
goto ouch;
}
tup->cond = json_string_value(tup->obj.saf_cond);
}
tup->obj.saf_msg = json_object_get(tup->obj.main, "msg");
if (tup->obj.saf_msg != NULL) {
if (!json_is_string(tup->obj.saf_msg)) {
msg = "msg must be a string";
goto ouch;
}
tup->msg = json_string_value(tup->obj.saf_msg);
}
tup->obj.saf_obj = json_object_get(tup->obj.main, "obj");
if (tup->obj.saf_obj != NULL) {
if (!json_is_object(tup->obj.saf_obj)) {
msg = "obj must be an object";
goto ouch;
}
tup->obj.cof_obj = tup->obj.saf_obj;
}
break;
default:
/* we weren't prepared for this -- unknown program state. */
abort();
}
/* Timestamps. */
tup->obj.zone_first = json_object_get(tup->obj.cof_obj,
"zone_time_first");
if (tup->obj.zone_first != NULL) {
if (!json_is_integer(tup->obj.zone_first)) {
msg = "zone_time_first must be an integer";
goto ouch;
}
tup->zone_first = (u_long)
json_integer_value(tup->obj.zone_first);
}
tup->obj.zone_last =
json_object_get(tup->obj.cof_obj, "zone_time_last");
if (tup->obj.zone_last != NULL) {
if (!json_is_integer(tup->obj.zone_last)) {
msg = "zone_time_last must be an integer";
goto ouch;
}
tup->zone_last = (u_long)
json_integer_value(tup->obj.zone_last);
}
tup->obj.time_first = json_object_get(tup->obj.cof_obj, "time_first");
if (tup->obj.time_first != NULL) {
if (!json_is_integer(tup->obj.time_first)) {
msg = "time_first must be an integer";
goto ouch;
}
tup->time_first = (u_long)
json_integer_value(tup->obj.time_first);
}
tup->obj.time_last = json_object_get(tup->obj.cof_obj, "time_last");
if (tup->obj.time_last != NULL) {
if (!json_is_integer(tup->obj.time_last)) {
msg = "time_last must be an integer";
goto ouch;
}
tup->time_last = (u_long)
json_integer_value(tup->obj.time_last);
}
/* Count. */
tup->obj.count = json_object_get(tup->obj.cof_obj, "count");
if (tup->obj.count != NULL) {
if (!json_is_integer(tup->obj.count)) {
msg = "count must be an integer";
goto ouch;
}
tup->count = json_integer_value(tup->obj.count);
}
/* Bailiwick. */
tup->obj.bailiwick = json_object_get(tup->obj.cof_obj, "bailiwick");
if (tup->obj.bailiwick != NULL) {
if (!json_is_string(tup->obj.bailiwick)) {
msg = "bailiwick must be a string";
goto ouch;
}
tup->bailiwick = json_string_value(tup->obj.bailiwick);
}
/* num_results -- just for a summarize. */
tup->obj.num_results =
json_object_get(tup->obj.cof_obj, "num_results");
if (tup->obj.num_results != NULL) {
if (!json_is_integer(tup->obj.num_results)) {
msg = "num_results must be an integer";
goto ouch;
}
tup->num_results = json_integer_value(tup->obj.num_results);
}
/* Records. */
tup->obj.rrname = json_object_get(tup->obj.cof_obj, "rrname");
if (tup->obj.rrname != NULL) {
if (!json_is_string(tup->obj.rrname)) {
msg = "rrname must be a string";
goto ouch;
}
char *r = strdup(json_string_value(tup->obj.rrname));
int dot = 0;
if ((transforms & TRANS_REVERSE) != 0) {
char *t = reverse(r);
DESTROY(r);
r = t;
t = NULL;
/* leading dot comes from reverse() */
if ((transforms & TRANS_CHOMP) != 0)
dot = 1;
} else if ((transforms & TRANS_CHOMP) != 0) {
/* unescaped trailing dot? */
size_t l = strlen(r);
if (l > 0 && r[l-1] == '.' &&
(l == 1 || r[l-2] != '\\'))
r[l-1] = '\0';
}
if (dot) {
/* in chomp+reverse, the dot to chomp is now leading. */
tup->rrname = strdup(r + dot);
DESTROY(r);
} else {
tup->rrname = r;
}
}
tup->obj.rrtype = json_object_get(tup->obj.cof_obj, "rrtype");
if (tup->obj.rrtype != NULL) {
if (!json_is_string(tup->obj.rrtype)) {
msg = "rrtype must be a string";
goto ouch;
}
tup->rrtype = json_string_value(tup->obj.rrtype);
}
tup->obj.rdata = json_object_get(tup->obj.cof_obj, "rdata");
if (tup->obj.rdata != NULL) {
if (json_is_string(tup->obj.rdata)) {
tup->rdata = json_string_value(tup->obj.rdata);
} else if (!json_is_array(tup->obj.rdata)) {
msg = "rdata must be a string or array";
goto ouch;
}
/* N.b., the array case is for the consumer to iterate over. */
}
assert(msg == NULL);
return NULL;
ouch:
assert(msg != NULL);
tuple_unmake(tup);
return msg;
}
/* tuple_unmake -- deallocate the heap storage associated with one tuple.
*/
void
tuple_unmake(pdns_tuple_t tup) {
DESTROY(tup->rrname);
json_decref(tup->obj.main);
}
/* countoff{_r,_debug} -- count and map the labels in a DNS name.
*/
static struct counted *
countoff_r(const char *src, int nlabel) {
const char *sp = src;
bool slash = false;
struct counted *c;
int ch;
/* count and map the alnums in the facing dns label. */
size_t nalnum = 0;
while ((ch = *sp++) != '\0') {
if (isalnum(ch))
nalnum++;
if (!slash) {
if (ch == '\\')
slash = true;
else if (ch == '.')
break;
} else {
slash = false;
}
}
size_t len = (size_t) (sp - src);
if (ch == '.') {
/* end of label, recurse to reach rest of name. */
c = countoff_r(sp, nlabel+1);
/* fill in output structure on the way back up. */
c->nchar += len;
c->nalnum += nalnum;
c->lens[nlabel] = len;
} else if (ch == '\0') {
/* end of name, and perhaps of a unterminated label. */
len--; /*'\0'*/
if (len != 0)
nlabel++;
c = (struct counted *)malloc(COUNTED_SIZE(nlabel));
memset(c, 0, COUNTED_SIZE(nlabel));
c->nlabel = nlabel;
c->nalnum = nalnum;
if (len != 0) {
c->nchar = len;
c->lens[nlabel-1] = c->nchar;
}
} else {
abort();
}
return c;
}
struct counted *
countoff(const char *src) {
return countoff_r(src, 0);
}
void
countoff_debug(const char *place, const char *thing, const struct counted *c) {
printf("\"%s\" -> {nlabel %d, nchar %zd, nalnum %zd, lens [",
thing, c->nlabel, c->nchar, c->nalnum);
const char *sep = "";
for (int i = 0; i < c->nlabel; i++) {
printf("%s%zd", sep, c->lens[i]);
sep = ", ";
}
printf("]} (%s)\n", place);
}
/* reverse -- put a domain name into TLD-first order.
*
* returns NULL if errno is set, else, a heap string.
*/
char *
reverse(const char *src) {
struct counted *c = countoff(src);
char *ret = malloc(c->nchar + 1/*'.'*/ + 1/*'\0'*/);
char *p = ret;
size_t nchar = 0;
for (ssize_t i = (ssize_t)c->nlabel-1; i >= 0; i--) {
size_t dot = (src[c->nchar - nchar - 1] == '.');
*p++ = '.';
memcpy(p, src + c->nchar - nchar - c->lens[i],
c->lens[i] - dot);
p += c->lens[i] - dot;
nchar += c->lens[i];
}
*p = '\0';
DESTROY(c);
return ret;
}
/* pdns_blob -- process one deblocked json pdns blob as a counted string.
*
* presents, or outputs to POSIX sort(1), the blob, and then frees it.
* returns number of tuples processed (for now, 1 or 0).
*/
int
pdns_blob(fetch_t fetch, size_t len) {
query_t query = fetch->query;
writer_t writer = query->writer;
struct pdns_tuple tup;
u_long first, last;
const char *msg;
int ret = 0;
msg = tuple_make(&tup, fetch->buf, len);
if (msg != NULL) {
my_logf("%s", msg);
goto more;
}
if (psys->encap == encap_saf) {
if (tup.msg != NULL) {
DEBUG(5, true, "data_blob tup.msg = %s\n", tup.msg);
fetch->saf_msg = strdup(tup.msg);
}
if (tup.cond != NULL) {
DEBUG(5, true, "pdns_blob tup.cond = %s\n", tup.cond);
/* if we goto next now, this line will not be counted.
*/
if (strcmp(tup.cond, "begin") == 0) {
fetch->saf_cond = sc_begin;
goto next;
} else if (strcmp(tup.cond, "ongoing") == 0) {
/* "cond":"ongoing" key vals should
* be ignored but the rest of line used. */
fetch->saf_cond = sc_ongoing;
} else if (strcmp(tup.cond, "succeeded") == 0) {
fetch->saf_cond = sc_succeeded;
goto next;
} else if (strcmp(tup.cond, "limited") == 0) {
fetch->saf_cond = sc_limited;
goto next;
} else if (strcmp(tup.cond, "failed") == 0) {
fetch->saf_cond = sc_failed;
goto next;
} else {
/* use sc_missing for an invalid cond value */
fetch->saf_cond = sc_missing;
my_logf("Unknown value for \"cond\": %s",
tup.cond);
}
}
/* A COF keepalive will have no "obj"
* but may have a "cond" or "msg".
*/
if (tup.obj.saf_obj == NULL) {
DEBUG(4, true,
"COF object is empty, i.e. a keepalive\n");
goto next;
}
}
/* there are two sets of timestamps in a tuple. we prefer
* the on-the-wire times to the zone times, when available.
*/
if (tup.time_first != 0 && tup.time_last != 0) {
first = (u_long)tup.time_first;
last = (u_long)tup.time_last;
} else {
first = (u_long)tup.zone_first;
last = (u_long)tup.zone_last;
}
if (sorting != no_sort) {