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sniff.cpp
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sniff.cpp
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/* Martin Vit [email protected]
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2.
*/
/*
This unit reads and parse packets from network interface or file
and insert them into Call class.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <time.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <net/ethernet.h>
#include "voipmonitor.h"
#ifdef FREEBSD
#include <machine/endian.h>
#else
#include <malloc.h>
#include <endian.h>
#endif
#include <sys/times.h>
#include <sys/param.h>
#include <sys/signal.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <syslog.h>
#include <semaphore.h>
#include <sstream>
#include <pcap.h>
//#include <pcap/sll.h>
#define int_ntoa(x) inet_ntoa(*((struct in_addr *)&x))
#define MAX_TCPSTREAMS 1024
//#define HAS_NIDS 1
#ifdef HAS_NIDS
#include <nids.h>
#endif
#include "flags.h"
#include "codecs.h"
#include "calltable.h"
#include "sniff.h"
#include "voipmonitor.h"
#include "filter_mysql.h"
#include "hash.h"
#include "rtp.h"
#include "rtcp.h"
#include "md5.h"
#include "tools.h"
#include "mirrorip.h"
#include "ipaccount.h"
#include "sql_db.h"
#include "rtp.h"
#include "skinny.h"
#include "tcpreassembly.h"
#include "ip_frag.h"
#include "regcache.h"
#include "manager.h"
extern MirrorIP *mirrorip;
#if defined(QUEUE_MUTEX) || defined(QUEUE_NONBLOCK)
extern "C" {
#include "liblfds.6/inc/liblfds.h"
}
#endif
#define MAXLIVEFILTERS 10
using namespace std;
#ifndef MAX
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#endif
#ifndef MIN
#define MIN(x,y) ((x) < (y) ? (x) : (y))
#endif
#ifdef MUTEX_THREAD
queue<pcap_packet*> readpacket_thread_queue;
extern pthread_mutex_t readpacket_thread_queue_lock;
#endif
unsigned int duplicate_counter = 0;
extern struct pcap_stat pcapstat;
int pcapstatresCount = 0;
Calltable *calltable;
extern volatile int calls;
extern int opt_pcap_queue;
extern int opt_saveSIP; // save SIP packets to pcap file?
extern int opt_saveRTP; // save RTP packets to pcap file?
extern int opt_saveRTCP; // save RTCP packets to pcap file?
extern int opt_saveRAW;
extern int opt_saveWAV;
extern int opt_saveGRAPH;
extern int opt_packetbuffered; // Make .pcap files writing ‘‘packet-buffered’’
extern int opt_rtcp; // Make .pcap files writing ‘‘packet-buffered’’
extern int verbosity;
extern int verbosityE;
extern int terminating;
extern int opt_rtp_firstleg;
extern int opt_sip_register;
extern int opt_norecord_header;
extern int opt_enable_tcpreassembly;
extern int opt_convert_dlt_sll_to_en10;
extern char *sipportmatrix;
extern char *httpportmatrix;
extern pcap_t *global_pcap_handle;
extern pcap_t *global_pcap_handle_dead_EN10MB;
extern read_thread *threads;
extern int opt_norecord_dtmf;
extern int opt_onlyRTPheader;
extern int opt_sipoverlap;
extern int readend;
extern int opt_dup_check;
extern int opt_dup_check_ipheader;
extern char opt_match_header[128];
extern int opt_domainport;
extern int opt_mirrorip;
extern int opt_mirrorall;
extern int opt_mirroronly;
extern char opt_scanpcapdir[2048];
extern int opt_ipaccount;
extern int opt_cdrproxy;
extern IPfilter *ipfilter;
extern IPfilter *ipfilter_reload;
extern int ipfilter_reload_do;
extern TELNUMfilter *telnumfilter;
extern TELNUMfilter *telnumfilter_reload;
extern int telnumfilter_reload_do;
extern int rtp_threaded;
extern int opt_pcap_threaded;
extern int opt_rtpsave_threaded;
extern int opt_rtpnosip;
extern char opt_cachedir[1024];
extern int opt_savewav_force;
extern int opt_saveudptl;
extern nat_aliases_t nat_aliases;
extern pcap_packet *qring;
extern volatile unsigned int readit;
extern volatile unsigned int writeit;
extern unsigned int qringmax;
extern int opt_pcapdump;
extern int opt_id_sensor;
extern int opt_destination_number_mode;
extern MySqlStore *sqlStore;
int global_pcap_dlink;
extern int opt_udpfrag;
extern int global_livesniffer;
extern int global_livesniffer_all;
extern int opt_pcap_split;
extern int opt_newdir;
extern int opt_callslimit;
extern int opt_skiprtpdata;
extern char opt_silencedmtfseq[16];
extern int opt_skinny;
extern int opt_read_from_file;
extern int opt_saverfc2833;
extern vector<dstring> opt_custom_headers_cdr;
extern vector<dstring> opt_custom_headers_message;
extern livesnifferfilter_use_siptypes_s livesnifferfilterUseSipTypes;
extern int opt_skipdefault;
extern TcpReassembly *tcpReassembly;
extern char ifname[1024];
extern uint8_t opt_sdp_reverse_ipport;
extern int opt_fork;
extern regcache *regfailedcache;
extern ManagerClientThreads ClientThreads;
extern int opt_register_timeout;
#ifdef QUEUE_MUTEX
extern sem_t readpacket_thread_semaphore;
#endif
static char * gettag(const void *ptr, unsigned long len, const char *tag, unsigned long *gettaglen, unsigned long *limitLen = NULL);
static void logPacketSipMethodCall(int sip_method, int lastSIPresponseNum, pcap_pkthdr *header, Call *call, const char *descr = NULL);
#define logPacketSipMethodCall_enable ((opt_read_from_file && verbosity > 2) || verbosityE > 1)
unsigned int numpackets = 0;
typedef struct tcp_stream2_s {
char *data;
int datalen;
pcap_pkthdr header;
u_char *packet;
u_int hash;
time_t ts;
u_int32_t seq;
u_int32_t next_seq;
u_int32_t ack_seq;
tcp_stream2_s *next;
string call_id;
int lastpsh;
} tcp_stream2_t;
typedef struct pcap_hdr_s {
u_int32_t magic_number; /* magic number */
u_int16_t version_major; /* major version number */
u_int16_t version_minor; /* minor version number */
int32_t thiszone; /* GMT to local correction */
u_int32_t sigfigs; /* accuracy of timestamps */
u_int32_t snaplen; /* max length of captured packets, in octets */
u_int32_t network; /* data link type */
} pcap_hdr_t;
typedef struct pcaprec_hdr_s {
u_int32_t ts_sec; /* timestamp seconds */
u_int32_t ts_usec; /* timestamp microseconds */
u_int32_t incl_len; /* number of octets of packet saved in file */
u_int32_t orig_len; /* actual length of packet */
} pcaprec_hdr_t;
tcp_stream2_t *tcp_streams_hashed[MAX_TCPSTREAMS];
list<tcp_stream2_t*> tcp_streams_list;
ipfrag_data_s ipfrag_data;
extern struct queue_state *qs_readpacket_thread_queue;
map<unsigned int, livesnifferfilter_t*> usersniffer;
#define ENABLE_CONVERT_DLT_SLL_TO_EN10(dlt) (dlt == DLT_LINUX_SLL && opt_convert_dlt_sll_to_en10 && global_pcap_handle_dead_EN10MB)
// return IP from nat_aliases[ip] or 0 if not found
in_addr_t match_nat_aliases(in_addr_t ip) {
nat_aliases_t::iterator iter;
iter = nat_aliases.find(ip);
if(iter == nat_aliases.end()) {
// not found
return 0;
} else {
return iter->second;
}
}
inline void save_packet_sql(Call *call, struct pcap_pkthdr *header, const u_char *packet, unsigned int saddr, int source, unsigned int daddr, int dest, int istcp, char *data, int datalen, int uid, int dlt, int sensor_id) {
//save packet
stringstream query;
// pcap file header
pcap_hdr_t pcaphdr; // 24bytes
pcaphdr.magic_number = 0xa1b2c3d4;
pcaphdr.version_major = 2;
pcaphdr.version_minor = 4;
pcaphdr.thiszone = 0;
pcaphdr.sigfigs = 0;
pcaphdr.snaplen = 3200;
pcaphdr.network = ENABLE_CONVERT_DLT_SLL_TO_EN10(dlt) ? DLT_EN10MB : dlt;
// packet header
pcaprec_hdr_t pcaph;
pcaph.ts_sec = header->ts.tv_sec; /* timestamp seconds */
pcaph.ts_usec = header->ts.tv_usec; /* timestamp microseconds */
pcaph.incl_len = header->caplen; /* number of octets of packet saved in file */
pcaph.orig_len = header->caplen; /* actual length of packet */
// copy data to mpacket buffer
char mpacket[10512];
char *ptr = mpacket;
memcpy(ptr, &pcaphdr, sizeof(pcaphdr)); // pcap header
ptr += sizeof(pcaphdr);
memcpy(ptr, &pcaph, sizeof(pcaph)); // packet header
ptr += sizeof(pcaph);
unsigned int len = MIN(10000, header->caplen);
memcpy(ptr, packet, len);
len += sizeof(pcaph) + sizeof(pcaphdr);
//construct description and call-id
char description[1024] = "";
char callidstr[1024] = "";
if(datalen) {
void *memptr = memmem(data, datalen, "\r\n", 2);
if(memptr) {
memcpy(description, data, (char *)memptr - (char*)data);
description[(char*)memptr - (char*)data] = '\0';
} else {
strcpy(description, "error in description\n");
}
if(!call) {
unsigned long l;
char *s = gettag(data, datalen, "\nCall-ID:", &l);
if(l > 0 && l < 1024) {
memcpy(callidstr, s, MIN(l, 1024));
callidstr[MIN(l, 1023)] = '\0';
}
}
}
// construct query and push it to mysqlquery queue
int id_sensor = sensor_id > 0 ? sensor_id : 0;
query << "INSERT INTO livepacket_" << uid <<
" SET sipcallerip = '" << saddr <<
"', sipcalledip = '" << daddr <<
"', id_sensor = " << id_sensor <<
", sport = " << source <<
", dport = " << dest <<
", istcp = " << istcp <<
", created_at = " << sqlEscapeStringBorder(sqlDateTimeString(header->ts.tv_sec).c_str()) <<
", microseconds = " << header->ts.tv_usec <<
", callid = " << sqlEscapeStringBorder(call ? call->call_id : callidstr) <<
", description = " << sqlEscapeStringBorder(description) <<
", data = '#" << sqlEscapeString(mpacket, len) << "#'";
sqlStore->lock(STORE_PROC_ID_SAVE_PACKET_SQL);
sqlStore->query(query.str().c_str(), STORE_PROC_ID_SAVE_PACKET_SQL);
sqlStore->unlock(STORE_PROC_ID_SAVE_PACKET_SQL);
return;
}
/*
stores SIP messags to sql.livepacket based on user filters
*/
int get_sip_peername(char *data, int data_len, const char *tag, char *peername, unsigned int peername_len);
inline void save_live_packet(Call *call, struct pcap_pkthdr *header, const u_char *packet, unsigned int saddr, int source, unsigned int daddr, int dest, int istcp, char *data, int datalen, unsigned char sip_type,
int dlt, int sensor_id) {
if(!global_livesniffer && !global_livesniffer_all) {
return;
}
// check saddr and daddr filters
daddr = htonl(daddr);
saddr = htonl(saddr);
if(global_livesniffer_all) {
save_packet_sql(call, header, packet, saddr, source, daddr, dest, istcp, data, datalen, 0,
dlt, sensor_id);
return;
}
/*
map<unsigned int, livesnifferfilter_t*>::iterator usersnifferIT;
for(usersnifferIT = usersniffer.begin(); usersnifferIT != usersniffer.end(); usersnifferIT++) {
livesnifferfilter_t *filter = usersnifferIT->second;
if(filter->all) {
goto save;
}
for(int i = 0; i < MAXLIVEFILTERS; i++) {
if(filter->lv_saddr[i] == saddr) goto save;
if(filter->lv_daddr[i] == daddr) goto save;
if(filter->lv_bothaddr[i] == daddr or filter->lv_bothaddr[i] == saddr) goto save;
if(call and filter->lv_srcnum[i][0] != '\0' and memmem(call->caller, strlen(call->caller), filter->lv_srcnum[i], strlen(filter->lv_srcnum[i]))) goto save;
if(call and filter->lv_dstnum[i][0] != '\0' and memmem(call->caller, strlen(call->caller), filter->lv_dstnum[i], strlen(filter->lv_dstnum[i]))) goto save;
if(call and filter->lv_bothnum[i][0] != '\0' and (
memmem(call->caller, strlen(call->caller), filter->lv_bothnum[i], strlen(filter->lv_bothnum[i])) or
memmem(call->called, strlen(call->called), filter->lv_bothnum[i], strlen(filter->lv_bothnum[i])))
) goto save;
}
continue;
save:
save_packet_sql(call, header, packet, saddr, source, daddr, dest, istcp, data, datalen, usersnifferIT->first);
}
// nothing matches
return;
*/
map<unsigned int, livesnifferfilter_t*>::iterator usersnifferIT;
char caller[1024] = "", called[1024] = "";
if(call) {
strncpy(caller, call->caller, sizeof(caller));
caller[sizeof(caller) - 1] = 0;
strncpy(called, call->called, sizeof(called));
called[sizeof(called) - 1] = 0;
} else {
bool needcaller = false;
bool needcalled = false;
for(usersnifferIT = usersniffer.begin(); usersnifferIT != usersniffer.end(); usersnifferIT++) {
if(!usersnifferIT->second->state.all_all && !usersnifferIT->second->state.all_num) {
for(int i = 0; i < MAXLIVEFILTERS; i++) {
if(!usersnifferIT->second->state.all_srcnum && usersnifferIT->second->lv_srcnum[i][0]) {
needcaller = true;
}
if(!usersnifferIT->second->state.all_dstnum && usersnifferIT->second->lv_dstnum[i][0]) {
needcalled = true;
}
if(!usersnifferIT->second->state.all_bothnum && usersnifferIT->second->lv_bothnum[i][0]) {
needcaller = true;
needcalled = true;
}
}
}
}
int res;
if(needcaller) {
res = get_sip_peername(data,datalen,"\nFrom:", caller, sizeof(caller));
if(res) {
// try compact header
get_sip_peername(data,datalen,"\nf:", caller, sizeof(caller));
}
}
if(needcalled) {
res = get_sip_peername(data,datalen,"\nTo:", called, sizeof(called));
if(res) {
// try compact header
get_sip_peername(data,datalen,"\nt:", called, sizeof(called));
}
}
}
for(usersnifferIT = usersniffer.begin(); usersnifferIT != usersniffer.end(); usersnifferIT++) {
livesnifferfilter_t *filter = usersnifferIT->second;
bool save = filter->state.all_all;
for(int i = 0; i < MAXLIVEFILTERS && !save; i++) {
bool okAddr =
filter->state.all_addr ||
((filter->state.all_saddr || (filter->lv_saddr[i] &&
saddr == filter->lv_saddr[i])) &&
(filter->state.all_daddr || (filter->lv_daddr[i] &&
daddr == filter->lv_daddr[i])) &&
(filter->state.all_bothaddr || (filter->lv_bothaddr[i] &&
(saddr == filter->lv_bothaddr[i] ||
daddr == filter->lv_bothaddr[i]))));
bool okNum =
filter->state.all_num ||
((filter->state.all_srcnum || (filter->lv_srcnum[i][0] &&
memmem(caller, strlen(caller), filter->lv_srcnum[i], strlen(filter->lv_srcnum[i])))) &&
(filter->state.all_dstnum || (filter->lv_dstnum[i][0] &&
memmem(called, strlen(called), filter->lv_dstnum[i], strlen(filter->lv_dstnum[i])))) &&
(filter->state.all_bothnum || (filter->lv_bothnum[i][0] &&
(memmem(caller, strlen(caller), filter->lv_bothnum[i], strlen(filter->lv_bothnum[i])) ||
memmem(called, strlen(called), filter->lv_bothnum[i], strlen(filter->lv_bothnum[i]))))));
bool okSipType =
filter->state.all_siptypes ||
filter->lv_siptypes[i] == sip_type;
if(okAddr && okNum && okSipType) {
save = true;
}
}
if(save) {
save_packet_sql(call, header, packet, saddr, source, daddr, dest, istcp, data, datalen, usersnifferIT->first,
dlt, sensor_id);
}
}
}
/*
save packet into file
type - 1 is SIP, 2 is RTP, 3 is RTCP
*/
inline void save_packet(Call *call, struct pcap_pkthdr *header, const u_char *packet, unsigned int saddr, int source, unsigned int daddr, int dest, int istcp, char *data, int datalen, int type,
int dlt, int sensor_id) {
bool allocPacket = false;
if(ENABLE_CONVERT_DLT_SLL_TO_EN10(dlt)) {
const u_char *packet_orig = packet;
pcap_pkthdr *header_orig = header;
packet = (const u_char*) new u_char[header_orig->caplen];
memcpy((u_char*)packet, (u_char*)packet_orig, 14);
memset((u_char*)packet, 0, 6);
((ether_header*)packet)->ether_type = ((sll_header*)packet_orig)->sll_protocol;
memcpy((u_char*)packet + 14, (u_char*)packet_orig + 16, header_orig->caplen - 16);
header = new pcap_pkthdr;
memcpy(header, header_orig, sizeof(pcap_pkthdr));
header->caplen -= 2;
header->len -= 2;
allocPacket = true;
}
// check if it should be stored to mysql
if(type == TYPE_SIP and global_livesniffer and (sipportmatrix[source] || sipportmatrix[dest])) {
save_live_packet(call, header, packet, saddr, source, daddr, dest, istcp, data, datalen, call->type,
dlt, sensor_id);
}
if(opt_newdir and opt_pcap_split) {
switch(type) {
case TYPE_SKINNY:
case TYPE_SIP:
if(call->getPcapSip()->isOpen()){
call->set_last_packet_time(header->ts.tv_sec);
call->getPcapSip()->dump(header, packet);
}
break;
case TYPE_RTP:
case TYPE_RTCP:
if(call->getPcapRtp()->isOpen()){
call->set_last_packet_time(header->ts.tv_sec);
call->getPcapRtp()->dump(header, packet);
} else {
char pcapFilePath_spool_relative[1024];
snprintf(pcapFilePath_spool_relative , 1023, "%s/%s/%s.pcap", call->dirname().c_str(), opt_newdir ? "RTP" : "", call->get_fbasename_safe());
pcapFilePath_spool_relative[1023] = 0;
static char str2[1024];
if(opt_cachedir[0] != '\0') {
snprintf(str2, 1023, "%s/%s", opt_cachedir, pcapFilePath_spool_relative);
} else {
strcpy(str2, pcapFilePath_spool_relative);
}
if(call->getPcapRtp()->open(str2, pcapFilePath_spool_relative, call->useHandle, call->useDlt)) {
if(verbosity > 3) syslog(LOG_NOTICE,"pcap_filename: [%s]\n", str2);
call->set_last_packet_time(header->ts.tv_sec);
call->getPcapRtp()->dump(header, packet);
}
}
break;
}
} else {
if (call->getPcap()->isOpen()){
call->set_last_packet_time(header->ts.tv_sec);
call->getPcap()->dump(header, packet);
}
}
if(allocPacket) {
delete [] packet;
delete header;
}
}
ParsePacket _parse_packet;
int check_sip20(char *data, unsigned long len){
if(len < 11) {
return 0;
}
if(_parse_packet.getParseData() == data) {
return(_parse_packet.isSip());
}
int ok;
char a = data[9];
data[9] = '\0';
//List of SIP request methods
//RFC 3261
if(strcasestr(data, "SIP/2.0")) {
ok = 1;
} else if(strcasestr(data, "INVITE")) {
ok = 1;
} else if(strcasestr(data, "ACK")) {
ok = 1;
} else if(strcasestr(data, "BYE")) {
ok = 1;
} else if(strcasestr(data, "CANCEL")) {
ok = 1;
} else if(strcasestr(data, "OPTIONS")) {
ok = 1;
} else if(strcasestr(data, "REGISTER")) {
ok = 1;
//RFC 3262
} else if(strcasestr(data, "PRACK")) {
ok = 1;
} else if(strcasestr(data, "SUBSCRIBE")) {
ok = 1;
} else if(strcasestr(data, "NOTIFY")) {
ok = 1;
} else if(strcasestr(data, "PUBLISH")) {
ok = 1;
} else if(strcasestr(data, "INFO")) {
ok = 1;
} else if(strcasestr(data, "REFER")) {
ok = 1;
} else if(strcasestr(data, "MESSAGE")) {
ok = 1;
} else if(strcasestr(data, "UPDATE")) {
ok = 1;
} else {
ok = 0;
}
data[9] = a;
return ok;
}
/* get SIP tag from memory pointed to *ptr length of len */
char * gettag(const void *ptr, unsigned long len, const char *tag, unsigned long *gettaglen, unsigned long *limitLen){
bool test_pp = false;
const char *rc_pp = NULL;
long l_pp;
char _tag[1024];
if(_parse_packet.getParseData() == ptr) {
rc_pp = _parse_packet.getContentData(tag, &l_pp);
if((!rc_pp || l_pp <= 0) && tag[0] != '\n') {
_tag[0] = '\n';
strcpy(_tag + 1, tag);
rc_pp = _parse_packet.getContentData(_tag, &l_pp);
}
if(!test_pp) {
if(rc_pp && l_pp > 0) {
*gettaglen = l_pp;
return((char*)rc_pp);
} else {
*gettaglen = 0;
return(NULL);
}
}
}
unsigned long register r, l, tl;
char *rc = NULL;
char *tmp;
char tmp2;
tmp = (char*)ptr;
bool positionOK = true;
unsigned long _limitLen = 0;
if(len <= 0) {
*gettaglen = 0;
return NULL;
}
// put '\0' at the end of the packet so it can be used with string functions. then restore the character
tmp2 = tmp[len - 1];
tmp[len - 1] = '\0';
tl = strlen(tag);
//r = (unsigned long)memmem(ptr, len, tag, tl); memmem cannot be used because SIP headers are case insensitive
r = (unsigned long)strcasestr(tmp, tag);
if(r == 0){
// tag did not match
l = 0;
} else {
//check if position ok
if(limitLen && *limitLen > 0) {
_limitLen = *limitLen;
} else {
const char *contentLengthString = "Content-Length: ";
char *contentLengthPos = strcasestr(tmp, contentLengthString);
if(contentLengthPos) {
int contentLength = atoi(contentLengthPos + strlen(contentLengthString));
if(contentLength >= 0) {
const char *endHeaderSepString = "\r\n\r\n";
char *endHeaderSepPos = (char*)memmem(tmp, len, endHeaderSepString, strlen(endHeaderSepString));
if(endHeaderSepPos) {
_limitLen = (endHeaderSepPos - tmp) + strlen(endHeaderSepString) + contentLength;
if(limitLen) {
*limitLen = _limitLen;
}
}
}
}
}
if(_limitLen &&
(unsigned long)(_limitLen + tmp) < r) {
positionOK = false;
}
if(positionOK || verbosity > 0) {
//tag matches move r pointer behind the tag name
r += tl;
tmp[len - 1] = tmp2;
l = (unsigned long)memmem((void *)r, len - (r - (unsigned long)ptr), "\r", 1);
if (l > 0){
// remove trailing \r\n and set l to length of the tag
l -= r;
} else {
// trailing \r not found try to find \n
l = (unsigned long)memmem((void *)r, len - (r - (unsigned long)ptr), "\n", 1);
if (l > 0){
// remove trailing \r\n and set l to length of the tag
l -= r;
} else {
// trailing \r not found try to find \n
l = 0;
}
}
} else {
l = 0;
}
}
tmp[len - 1] = tmp2;
// left trim spacees
if(l > 0) {
rc = (char*)r;
if (rc) {
while (((char *)ptr + len) > rc && rc[0] == ' '){
rc++;
l--;
}
}
}
if(!positionOK) {
if(verbosity > 2 && l > 0) {
char tagc[101];
strncpy(tagc, rc, min(l, 100ul));
tagc[min(l, 100ul)] = 0;
syslog(LOG_NOTICE, "bad tag position - tag: %s, content: %s\n", tag, tagc);
}
*gettaglen = 0;
} else {
*gettaglen = l;
}
if(test_pp && rc && l) {
if(_parse_packet.getParseData() == ptr) {
//cout << "." << flush;
string content = string(rc_pp, l_pp);
string content2 = string(rc, l);
while(content2.length() && content2[content2.length() - 1] == ' ') {
content2.resize(content2.length() - 1);
}
if(content != content2) {
cout << "GETTAG ERR " << tag << " :: " << content << " // " << string(rc, l) << endl;
//cout << (char*)ptr << endl << endl << endl << endl;
}
} else {
cout << "GETTAG --- " << tag << " :: " << string(rc, l) << endl;
}
}
return rc;
}
int get_sip_peercnam(char *data, int data_len, const char *tag, char *peername, unsigned int peername_len){
unsigned long r, r2, peername_tag_len;
char *peername_tag = gettag(data, data_len, tag, &peername_tag_len);
if(!peername_tag_len) {
goto fail_exit;
}
/* three types of URI
1) "A. G. Bell" <sip:[email protected]> ;tag=a48s
2) Anonymous <sip:[email protected]>;tag=hyh8
3) sip:[email protected];tag=887s
*/
if ((r = (unsigned long)memmem(peername_tag, peername_tag_len, "\"", 1)) == 0){
// try without ""
if ((r = (unsigned long)memmem(peername_tag, peername_tag_len, "<", 1)) == 0){
goto fail_exit;
} else {
// found case 2) Anonymous <sip:[email protected]>;tag=hyh8
r = (unsigned long)peername_tag;
}
} else {
// found case 1) "A. G. Bell" <sip:[email protected]> ;tag=a48s
r += 1;
}
if ((r2 = (unsigned long)memmem(peername_tag, peername_tag_len, "\" <", 3)) == 0){
// try without space ' '
if ((r2 = (unsigned long)memmem(peername_tag, peername_tag_len, "\"<", 2)) == 0){
// try without quotes
if ((r2 = (unsigned long)memmem(peername_tag, peername_tag_len, " <", 2)) == 0){
goto fail_exit;
}
}
}
if (r2 <= r || ((r2 - r) > (unsigned long)peername_len) ){
goto fail_exit;
}
memcpy(peername, (void*)r, MIN(r2 - r, peername_len));
peername[MIN(r2 - r, peername_len - 1)] = '\0';
return 0;
fail_exit:
strcpy(peername, "");
return 1;
}
int get_sip_peername(char *data, int data_len, const char *tag, char *peername, unsigned int peername_len){
unsigned long r, r2, peername_tag_len;
char *peername_tag = gettag(data, data_len, tag, &peername_tag_len);
if(!peername_tag_len) {
goto fail_exit;
}
if ((r = (unsigned long)memmem(peername_tag, peername_tag_len, "sip:", 4)) == 0){
goto fail_exit;
}
r += 4;
if ((r2 = (unsigned long)memmem((char*)r, peername_tag_len, "@", 1)) == 0){
goto fail_exit;
}
if (r2 <= r || ((r2 - r) > (unsigned long)peername_len) ){
goto fail_exit;
}
memcpy(peername, (void*)r, MIN(r2 - r, peername_len));
peername[MIN(r2 - r, peername_len - 1)] = '\0';
return 0;
fail_exit:
strcpy(peername, "");
return 1;
}
int get_sip_domain(char *data, int data_len, const char *tag, char *domain, unsigned int domain_len){
unsigned long r, r2, peername_tag_len;
char *peername_tag = gettag(data, data_len, tag, &peername_tag_len);
char *c;
if(!peername_tag_len) {
goto fail_exit;
}
if ((r = (unsigned long)memmem(peername_tag, peername_tag_len, "sip:", 4)) == 0){
goto fail_exit;
}
r += 4;
if ((r = (unsigned long)memmem((char*)r, peername_tag_len, "@", 1)) == 0){
goto fail_exit;
}
r += 1;
if ((r2 = (unsigned long)memmem(peername_tag, peername_tag_len, ">", 1)) == 0){
if ((r2 = (unsigned long)memmem(peername_tag, peername_tag_len + 1, "\r", 1)) == 0){
goto fail_exit;
}
}
if (r2 <= r || ((r2 - r) > (unsigned long)domain_len) ){
goto fail_exit;
}
memcpy(domain, (void*)r, MIN(r2 - r, domain_len));
domain[MIN(r2 - r, domain_len - 1)] = '\0';
// strip :port
if(!opt_domainport) {
c = strchr(domain, ':');
if(c != NULL)
*c = '\0';
}
// check if there is ; in the string (for example sip:<123@domain;user=phone>
c = strchr(domain, ';');
if(c != NULL)
*c = '\0';
return 0;
fail_exit:
strcpy(domain, "");
return 1;
}
int get_sip_branch(char *data, int data_len, const char *tag, char *branch, unsigned int branch_len){
unsigned long r, r2, branch_tag_len;
char *branch_tag = gettag(data, data_len, tag, &branch_tag_len);
if ((r = (unsigned long)memmem(branch_tag, branch_tag_len, "branch=", 7)) == 0){
goto fail_exit;
}
r += 7;
if ((r2 = (unsigned long)memmem(branch_tag, branch_tag_len, ";", 1)) == 0){
goto fail_exit;
}
if (r2 <= r || ((r2 - r) > (unsigned long)branch_len) ){
goto fail_exit;
}
memcpy(branch, (void*)r, MIN(r2 - r, branch_len));
branch[MIN(r2 - r, branch_len - 1)] = '\0';
return 0;
fail_exit:
strcpy(branch, "");
return 1;
}
int get_ip_port_from_sdp(char *sdp_text, in_addr_t *addr, unsigned short *port, int *fax){
unsigned long l;
char *s;
char s1[20];
size_t sdp_text_len = strlen(sdp_text);
unsigned long gettagLimitLen = 0;
*fax = 0;
s = gettag(sdp_text,sdp_text_len, "c=IN IP4 ", &l, &gettagLimitLen);
if(l == 0) return 1;
memset(s1, '\0', sizeof(s1));
memcpy(s1, s, MIN(l, 19));
// printf("---------- [%s]\n", s1);
if ((int32_t)(*addr = inet_addr(s1)) == -1){
*addr = 0;
*port = 0;
return 1;
}
s = gettag(sdp_text, sdp_text_len, "m=audio ", &l, &gettagLimitLen);
if (l == 0 || (*port = atoi(s)) == 0){
s = gettag(sdp_text, sdp_text_len, "m=image ", &l, &gettagLimitLen);
if (l == 0 || (*port = atoi(s)) == 0){
*port = 0;
return 1;
} else {
*fax = 1;
}
}
return 0;
}
int get_value_stringkeyval2(const char *data, unsigned int data_len, const char *key, char *value, int unsigned len) {
unsigned long r, tag_len;
char *tmp = gettag(data, data_len, key, &tag_len);
//gettag removes \r\n but we need it
if(!tag_len) {
goto fail_exit;
} else {
//gettag remove trailing \r but we need it
tag_len++;
}
if ((r = (unsigned long)memmem(tmp, tag_len, ";", 1)) == 0){
if ((r = (unsigned long)memmem(tmp, tag_len, "\r", 1)) == 0){
goto fail_exit;
}
}
memcpy(value, (void*)tmp, MIN((r - (unsigned long)tmp), len));
value[MIN(r - (unsigned long)tmp, len - 1)] = '\0';
return 0;
fail_exit:
strcpy(value, "");
return 1;
}
int get_expires_from_contact(char *data, int datalen, int *expires){
char *s;
unsigned long l;
unsigned long gettagLimitLen = 0;
if(datalen < 8) return 1;
s = gettag(data, datalen, "\nContact:", &l, &gettagLimitLen);
if(!l) {
//try compact header
s = gettag(data, datalen, "\nm:", &l, &gettagLimitLen);
}
if(l && ((unsigned int)l < ((unsigned int)datalen - (s - data)))) {
char tmp[128];
int res = get_value_stringkeyval2(s, l + 2, "expires=", tmp, sizeof(tmp));
if(res) {
// not found, try again in case there is more Contact headers
return get_expires_from_contact(s, datalen - (s - data), expires);
} else {
*expires = atoi(tmp);
return 0;
}
} else {
return 1;
}
}
int get_value_stringkeyval(const char *data, unsigned int data_len, const char *key, char *value, unsigned int len) {
unsigned long r, tag_len;
char *tmp = gettag(data, data_len, key, &tag_len);
if(!tag_len) {
goto fail_exit;
}
if ((r = (unsigned long)memmem(tmp, tag_len, "\"", 1)) == 0){
goto fail_exit;
}
memcpy(value, (void*)tmp, MIN(r - (unsigned long)tmp, len));
value[MIN(r - (unsigned long)tmp, len - 1)] = '\0';
return 0;
fail_exit:
strcpy(value, "");
return 1;
}
int mimeSubtypeToInt(char *mimeSubtype) {
if(strcasecmp(mimeSubtype,"G729") == 0)
return PAYLOAD_G729;
else if(strcasecmp(mimeSubtype,"GSM") == 0)
return PAYLOAD_GSM;
else if(strcasecmp(mimeSubtype,"G723") == 0)
return PAYLOAD_G723;
else if(strcasecmp(mimeSubtype,"PCMA") == 0)
return PAYLOAD_PCMA;
else if(strcasecmp(mimeSubtype,"PCMU") == 0)
return PAYLOAD_PCMU;
else if(strcasecmp(mimeSubtype,"iLBC") == 0)
return PAYLOAD_ILBC;
else if(strcasecmp(mimeSubtype,"speex") == 0)
return PAYLOAD_SPEEX;
else if(strcasecmp(mimeSubtype,"SPEEX") == 0)
return PAYLOAD_SPEEX;
else if(strcasecmp(mimeSubtype,"SILK") == 0)
return PAYLOAD_SILK;
else if(strcasecmp(mimeSubtype,"ISAC") == 0)
return PAYLOAD_ISAC;
else if(strcasecmp(mimeSubtype,"CLEARMODE") == 0)
return PAYLOAD_CLEARMODE;
else if(strcasecmp(mimeSubtype,"OPUS") == 0)
return PAYLOAD_OPUS;
else if(strcasecmp(mimeSubtype,"telephone-event") == 0)
return PAYLOAD_TELEVENT;
else
return 0;
}
int get_rtpmap_from_sdp(char *sdp_text, unsigned long len, int *rtpmap){
unsigned long l = 0;
char *s, *z;
int codec;
char mimeSubtype[128];
int i = 0;
int rate = 0;
unsigned long gettagLimitLen = 0;
s = gettag(sdp_text, len, "m=audio ", &l, &gettagLimitLen);
if(!l) {