4 Copyright (C) 2000 Simon MORLAT (simon.morlat@linphone.org)
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License
8 as published by the Free Software Foundation; either version 2
9 of the License, or (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include "mediastreamer2/mediastream.h"
25 #ifdef HAVE_SIGHANDLER_T
27 #endif /*HAVE_SIGHANDLER_T*/
30 #if !defined(_WIN32_WCE)
32 #include <sys/types.h>
39 #include <ortp/stun.h>
41 #ifdef HAVE_GETIFADDRS
49 static char lock_name[80];
50 static char lock_set=0;
51 /* put a lock file in /tmp. this is called when linphone runs as a daemon*/
56 snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
57 lockfile=fopen(lock_name,"w");
60 printf("Failed to create lock file.\n");
63 fprintf(lockfile,"%i",getpid());
69 /* looks if there is a lock file. If presents return its content (the pid of the already running linphone), if not found, returns -1*/
75 snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
76 lockfile=fopen(lock_name,"r");
79 if (fscanf(lockfile,"%i",&pid)!=1){
80 ms_warning("Could not read pid in lock file.");
88 /* remove the lock file if it was set*/
89 int remove_lock_file()
94 err=unlink(lock_name);
102 char *int2str(int number)
104 char *numstr=ms_malloc(10);
105 snprintf(numstr,10,"%i",number);
109 void check_sound_device(LinphoneCore *lc)
116 char *i810_audio=NULL;
117 char *snd_pcm_oss=NULL;
118 char *snd_mixer_oss=NULL;
120 fd=open("/proc/modules",O_RDONLY);
123 /* read the entire /proc/modules file and check if sound conf seems correct */
124 /*a=fstat(fd,&statbuf);
125 if (a<0) ms_warning("Can't stat /proc/modules:%s.",strerror(errno));
127 if (len==0) ms_warning("/proc/modules has zero size!");
129 /***** fstat does not work on /proc/modules for unknown reason *****/
131 file=ms_malloc(len+1);
133 if (a<len) file=ms_realloc(file,a+1);
135 i810_audio=strstr(file,"i810_audio");
136 if (i810_audio!=NULL){
137 /* I'm sorry i put this warning in comments because
138 * i don't use yet the right driver !! */
139 /* lc->vtable.display_warning(lc,_("You are currently using the i810_audio driver.\nThis driver is buggy and so does not work with Linphone.\nWe suggest that you replace it by its equivalent ALSA driver,\neither with packages from your distribution, or by downloading\nALSA drivers at http://www.alsa-project.org."));*/
142 snd_pcm=strstr(file,"snd-pcm");
144 snd_pcm_oss=strstr(file,"snd-pcm-oss");
145 snd_mixer_oss=strstr(file,"snd-mixer-oss");
146 if (snd_pcm_oss==NULL){
147 lc->vtable.display_warning(lc,_("Your computer appears to be using ALSA sound drivers.\nThis is the best choice. However the pcm oss emulation module\nis missing and linphone needs it. Please execute\n'modprobe snd-pcm-oss' as root to load it."));
149 if (snd_mixer_oss==NULL){
150 lc->vtable.display_warning(lc,_("Your computer appears to be using ALSA sound drivers.\nThis is the best choice. However the mixer oss emulation module\nis missing and linphone needs it. Please execute\n 'modprobe snd-mixer-oss' as root to load it."));
155 ms_warning("Could not open /proc/modules.");
157 /* now check general volume. Some user forget to rise it and then complain that linphone is
159 /* but some other users complain that linphone should not change levels...
160 if (lc->sound_conf.sndcard!=NULL){
161 a=snd_card_get_level(lc->sound_conf.sndcard,SND_CARD_LEVEL_GENERAL);
163 ms_warning("General level is quite low (%i). Linphone rises it up for you.",a);
164 snd_card_set_level(lc->sound_conf.sndcard,SND_CARD_LEVEL_GENERAL,80);
169 if (file!=NULL) ms_free(file);
175 #define RTP_HDR_SZ 12
176 #define IP4_HDR_SZ 20 /*20 is the minimum, but there may be some options*/
178 static void payload_type_set_enable(PayloadType *pt,int value)
180 if ((value)!=0) payload_type_set_flag(pt,PAYLOAD_TYPE_ENABLED); \
181 else payload_type_unset_flag(pt,PAYLOAD_TYPE_ENABLED);
184 static bool_t payload_type_enabled(PayloadType *pt) {
185 return (((pt)->flags & PAYLOAD_TYPE_ENABLED)!=0);
188 bool_t linphone_core_payload_type_enabled(LinphoneCore *lc, PayloadType *pt){
189 if (ms_list_find(lc->codecs_conf.audio_codecs,pt) || ms_list_find(lc->codecs_conf.video_codecs,pt)){
190 return payload_type_enabled(pt);
192 ms_error("Getting enablement status of codec not in audio or video list of PayloadType !");
196 int linphone_core_enable_payload_type(LinphoneCore *lc, PayloadType *pt, bool_t enabled){
197 if (ms_list_find(lc->codecs_conf.audio_codecs,pt) || ms_list_find(lc->codecs_conf.video_codecs,pt)){
198 payload_type_set_enable(pt,enabled);
201 ms_error("Enabling codec not in audio or video list of PayloadType !");
205 const char *linphone_core_get_payload_type_description(LinphoneCore *lc, PayloadType *pt){
206 if (ms_filter_codec_supported(pt->mime_type)){
207 MSFilterDesc *desc=ms_filter_get_encoder(pt->mime_type);
208 return _(desc->text);
214 /*this function makes a special case for speex/8000.
215 This codec is variable bitrate. The 8kbit/s mode is interesting when having a low upload bandwidth, but its quality
216 is not very good. We 'd better use its 15kbt/s mode when we have enough bandwidth*/
217 static int get_codec_bitrate(LinphoneCore *lc, const PayloadType *pt){
218 int upload_bw=linphone_core_get_upload_bandwidth(lc);
219 if (bandwidth_is_greater(upload_bw,129) || (bandwidth_is_greater(upload_bw,33) && !linphone_core_video_enabled(lc)) ) {
220 if (strcmp(pt->mime_type,"speex")==0 && pt->clock_rate==8000){
224 return pt->normal_bitrate;
227 static double get_audio_payload_bandwidth(LinphoneCore *lc, const PayloadType *pt){
231 bitrate=get_codec_bitrate(lc,pt);
232 packet_size= (((double)bitrate)/(50*8))+UDP_HDR_SZ+RTP_HDR_SZ+IP4_HDR_SZ;
233 return packet_size*8.0*npacket;
236 void linphone_core_update_allocated_audio_bandwidth_in_call(LinphoneCall *call, const PayloadType *pt){
237 call->audio_bw=(int)(get_audio_payload_bandwidth(call->core,pt)/1000.0);
238 ms_message("Audio bandwidth for this call is %i",call->audio_bw);
241 void linphone_core_update_allocated_audio_bandwidth(LinphoneCore *lc){
243 PayloadType *max=NULL;
244 for(elem=linphone_core_get_audio_codecs(lc);elem!=NULL;elem=elem->next){
245 PayloadType *pt=(PayloadType*)elem->data;
246 if (payload_type_enabled(pt)){
247 int pt_bitrate=get_codec_bitrate(lc,pt);
248 if (max==NULL) max=pt;
249 else if (max->normal_bitrate<pt_bitrate){
255 lc->audio_bw=(int)(get_audio_payload_bandwidth(lc,max)/1000.0);
259 bool_t linphone_core_is_payload_type_usable_for_bandwidth(LinphoneCore *lc, PayloadType *pt, int bandwidth_limit)
265 case PAYLOAD_AUDIO_CONTINUOUS:
266 case PAYLOAD_AUDIO_PACKETIZED:
267 codec_band=get_audio_payload_bandwidth(lc,pt);
268 ret=bandwidth_is_greater(bandwidth_limit*1000,codec_band);
269 /*hack to avoid using uwb codecs when having low bitrate and video*/
270 if (bandwidth_is_greater(199,bandwidth_limit)){
271 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
275 //ms_message("Payload %s: %g",pt->mime_type,codec_band);
278 if (bandwidth_limit!=0) {/* infinite (-1) or strictly positive*/
287 /* return TRUE if codec can be used with bandwidth, FALSE else*/
288 bool_t linphone_core_check_payload_type_usability(LinphoneCore *lc, PayloadType *pt)
291 int allowed_bw,video_bw;
294 linphone_core_update_allocated_audio_bandwidth(lc);
295 allowed_bw=get_min_bandwidth(linphone_core_get_download_bandwidth(lc),
296 linphone_core_get_upload_bandwidth(lc));
299 video_bw=1500; /*around 1.5 Mbit/s*/
301 video_bw=get_video_bandwidth(allowed_bw,lc->audio_bw);
304 case PAYLOAD_AUDIO_CONTINUOUS:
305 case PAYLOAD_AUDIO_PACKETIZED:
306 codec_band=get_audio_payload_bandwidth(lc,pt);
307 ret=bandwidth_is_greater(allowed_bw*1000,codec_band);
308 /*hack to avoid using uwb codecs when having low bitrate and video*/
309 if (bandwidth_is_greater(199,allowed_bw)){
310 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
314 //ms_message("Payload %s: %g",pt->mime_type,codec_band);
318 pt->normal_bitrate=video_bw*1000;
327 bool_t lp_spawn_command_line_sync(const char *command, char **result,int *command_ret){
328 #if !defined(_WIN32_WCE)
329 FILE *f=popen(command,"r");
332 *result=ms_malloc(4096);
333 err=fread(*result,1,4096-1,f);
335 ms_warning("Error reading command output:%s",strerror(errno));
341 if (command_ret!=NULL) *command_ret=err;
344 #endif /*_WIN32_WCE*/
348 static ortp_socket_t create_socket(int local_port){
349 struct sockaddr_in laddr;
352 sock=socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
354 ms_error("Fail to create socket");
357 memset (&laddr,0,sizeof(laddr));
358 laddr.sin_family=AF_INET;
359 laddr.sin_addr.s_addr=INADDR_ANY;
360 laddr.sin_port=htons(local_port);
361 if (bind(sock,(struct sockaddr*)&laddr,sizeof(laddr))<0){
362 ms_error("Bind socket to 0.0.0.0:%i failed: %s",local_port,getSocketError());
367 if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
368 (SOCKET_OPTION_VALUE)&optval, sizeof (optval))<0){
369 ms_warning("Fail to set SO_REUSEADDR");
371 set_non_blocking_socket(sock);
375 static int sendStunRequest(int sock, const struct sockaddr *server, socklen_t addrlen, int id, bool_t changeAddr){
376 char buf[STUN_MAX_MESSAGE_SIZE];
377 int len = STUN_MAX_MESSAGE_SIZE;
378 StunAtrString username;
379 StunAtrString password;
382 memset(&req, 0, sizeof(StunMessage));
383 memset(&username,0,sizeof(username));
384 memset(&password,0,sizeof(password));
385 stunBuildReqSimple( &req, &username, changeAddr , changeAddr , id);
386 len = stunEncodeMessage( &req, buf, len, &password);
388 ms_error("Fail to encode stun message.");
391 err=sendto(sock,buf,len,0,server,addrlen);
393 ms_error("sendto failed: %s",strerror(errno));
399 static int parse_stun_server_addr(const char *server, struct sockaddr_storage *ss, socklen_t *socklen){
400 struct addrinfo hints,*res=NULL;
403 char host[NI_MAXHOST];
405 host[NI_MAXHOST-1]='\0';
406 strncpy(host,server,sizeof(host)-1);
412 memset(&hints,0,sizeof(hints));
413 hints.ai_family=PF_INET;
414 hints.ai_socktype=SOCK_DGRAM;
415 hints.ai_protocol=IPPROTO_UDP;
416 ret=getaddrinfo(host,port,&hints,&res);
418 ms_error("getaddrinfo() failed for %s:%s : %s",host,port,gai_strerror(ret));
422 memcpy(ss,res->ai_addr,res->ai_addrlen);
423 *socklen=res->ai_addrlen;
428 static int recvStunResponse(ortp_socket_t sock, char *ipaddr, int *port, int *id){
429 char buf[STUN_MAX_MESSAGE_SIZE];
430 int len = STUN_MAX_MESSAGE_SIZE;
432 len=recv(sock,buf,len,0);
435 stunParseMessage(buf,len, &resp );
436 *id=resp.msgHdr.tr_id.octet[0];
437 if (resp.hasXorMappedAddress){
438 *port = resp.xorMappedAddress.ipv4.port;
439 ia.s_addr=htonl(resp.xorMappedAddress.ipv4.addr);
440 }else if (resp.hasMappedAddress){
441 *port = resp.mappedAddress.ipv4.port;
442 ia.s_addr=htonl(resp.mappedAddress.ipv4.addr);
444 strncpy(ipaddr,inet_ntoa(ia),LINPHONE_IPADDR_SIZE);
449 void linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){
450 const char *server=linphone_core_get_stun_server(lc);
452 if (lc->sip_conf.ipv6_enabled){
453 ms_warning("stun support is not implemented for ipv6");
457 struct sockaddr_storage ss;
459 ortp_socket_t sock1=-1, sock2=-1;
460 bool_t video_enabled=linphone_core_video_enabled(lc);
461 bool_t got_audio,got_video;
462 bool_t cone_audio=FALSE,cone_video=FALSE;
463 struct timeval init,cur;
464 SalEndpointCandidate *ac,*vc;
466 ac=&call->localdesc->streams[0].candidates[0];
467 vc=&call->localdesc->streams[1].candidates[0];
469 if (parse_stun_server_addr(server,&ss,&ss_len)<0){
470 ms_error("Fail to parser stun server address: %s",server);
473 if (lc->vtable.display_status!=NULL)
474 lc->vtable.display_status(lc,_("Stun lookup in progress..."));
476 /*create the two audio and video RTP sockets, and send STUN message to our stun server */
477 sock1=create_socket(call->audio_port);
480 sock2=create_socket(call->video_port);
481 if (sock2<0) return ;
483 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,11,TRUE);
484 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,1,FALSE);
486 sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,22,TRUE);
487 sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,2,FALSE);
491 gettimeofday(&init,NULL);
501 if (recvStunResponse(sock1,ac->addr,
503 ms_message("STUN test result: local audio port maps to %s:%i",
510 if (recvStunResponse(sock2,vc->addr,
512 ms_message("STUN test result: local video port maps to %s:%i",
519 gettimeofday(&cur,NULL);
520 elapsed=((cur.tv_sec-init.tv_sec)*1000.0) + ((cur.tv_usec-init.tv_usec)/1000.0);
521 if (elapsed>2000) break;
522 }while(!(got_audio && (got_video||sock2<0) ) );
524 ms_error("No stun server response for audio port.");
527 ms_warning("NAT is symmetric for audio port");
536 ms_error("No stun server response for video port.");
539 ms_warning("NAT is symmetric for video port.");
547 if ((ac->addr[0]!='\0' && vc->addr[0]!='\0' && strcmp(ac->addr,vc->addr)==0)
549 strcpy(call->localdesc->addr,ac->addr);
552 if (sock2>=0) close_socket(sock2);
556 static int extract_sip_port(const char *config){
560 FILE *f=fopen(config,"r");
562 while(fgets(line,sizeof(line),f)!=NULL){
563 if (fmtp_get_value(line,"sip_port",port,sizeof(port))){
572 int linphone_core_wake_up_possible_already_running_instance(
573 const char * config_file, const char * addr_to_call)
575 int port=extract_sip_port(config_file);
576 const char *wakeup="WAKEUP sip:127.0.0.1 SIP/2.0\r\n"
577 "Via: SIP/2.0/UDP 127.0.0.1:%i;rport;branch=z9hG4bK%u\r\n"
578 "From: <sip:another_linphone@127.0.0.1>;tag=%u\r\n"
579 "To: <sip:you@127.0.0.1>\r\n"
581 "Call-ID: %u@onsantape\r\n"
582 "Content-length: 0\r\n\r\n";
583 const char * call = "REFER sip:127.0.0.1 SIP/2.0\r\n"
584 "Via: SIP/2.0/UDP 127.0.0.1:%i;rport;branch=z9hG4bK%u\r\n"
585 "From: <sip:another_linphone@127.0.0.1>;tag=%u\r\n"
586 "To: <sip:you@127.0.0.1>\r\n"
589 "Call-ID: %u@onsantape\r\n"
590 "Content-length: 0\r\n\r\n";
592 /*make sure ortp is initialized (it initializes win32 socket api)*/
595 struct sockaddr_storage ss;
598 snprintf(tmp,sizeof(tmp),"127.0.0.1:%i",port);
599 if (parse_stun_server_addr(tmp,&ss,&sslen)==0){
601 ortp_socket_t sock=create_socket(locport);
602 if (sock<0) sock=create_socket(++locport);
605 if (addr_to_call != NULL)
606 snprintf(req, sizeof(req), call, locport,
607 random(), random(), addr_to_call, random());
609 snprintf(req, sizeof(req), wakeup, locport,
610 random(), random(), random());
611 if (connect(sock,(struct sockaddr*)&ss,sslen)<0){
612 fprintf(stderr,"connect failed: %s\n",getSocketError());
613 }else if (send(sock,req,strlen(req),0)>0){
614 /*wait a bit for a response*/
617 if (recv(sock,req,sizeof(req),0)>0){
620 }else if (getSocketErrorCode()!=EWOULDBLOCK){
630 ms_message("sendto() of WAKEUP request failed, nobody to wakeup.");
639 #ifdef HAVE_GETIFADDRS
642 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
645 struct ifaddrs *ifpstart;
648 if (getifaddrs(&ifpstart) < 0) {
652 for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
653 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
654 && (ifp->ifa_flags & IFF_RUNNING) && !(ifp->ifa_flags & IFF_LOOPBACK))
656 getnameinfo(ifp->ifa_addr,
658 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
659 address, size, NULL, 0, NI_NUMERICHOST);
660 if (strchr(address, '%') == NULL) { /*avoid ipv6 link-local addresses */
661 /*ms_message("getifaddrs() found %s",address);*/
667 freeifaddrs(ifpstart);
673 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
675 struct addrinfo hints;
676 struct addrinfo *res=NULL;
677 struct sockaddr_storage addr;
678 struct sockaddr *p_addr=(struct sockaddr*)&addr;
682 memset(&hints,0,sizeof(hints));
683 hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
684 hints.ai_socktype=SOCK_DGRAM;
685 /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
686 err=getaddrinfo(dest,"5060",&hints,&res);
688 ms_error("getaddrinfo() error: %s",gai_strerror(err));
692 ms_error("bug: getaddrinfo returned nothing.");
695 sock=socket(res->ai_family,SOCK_DGRAM,0);
697 err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
699 ms_warning("Error in setsockopt: %s",strerror(errno));
701 err=connect(sock,res->ai_addr,res->ai_addrlen);
703 ms_error("Error in connect: %s",strerror(errno));
711 err=getsockname(sock,(struct sockaddr*)&addr,&s);
713 ms_error("Error in getsockname: %s",strerror(errno));
717 if (p_addr->sa_family==AF_INET){
718 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
719 if (p_sin->sin_addr.s_addr==0){
724 err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
726 ms_error("getnameinfo error: %s",strerror(errno));
729 ms_message("Local interface to reach %s is %s.",dest,result);
733 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
734 strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
735 #ifdef HAVE_GETIFADDRS
737 /*we use getifaddrs for lookup of default interface */
740 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
743 }else if (found_ifs<=0){
744 /*absolutely no network on this machine */
749 /*else use connect to find the best local ip address */
751 dest="87.98.157.38"; /*a public IP address*/
752 else dest="2a00:1450:8002::68";
753 return get_local_ip_for_with_connect(type,dest,result);
762 void _linphone_core_configure_resolver(){
763 /*bionic declares _res but does not define nor export it !!*/
765 /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
766 setenv("RES_OPTIONS","timeout:1 attempts:2 retrans:1 retry:2",1);
769 _res.retrans=1; /*retransmit every second*/
770 _res.retry=2; /*only two times per DNS server*/
776 void _linphone_core_configure_resolver(){