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(const PayloadType *pt) {
185 return (((pt)->flags & PAYLOAD_TYPE_ENABLED)!=0);
188 bool_t linphone_core_payload_type_enabled(LinphoneCore *lc, const PayloadType *pt){
189 if (ms_list_find(lc->codecs_conf.audio_codecs, (PayloadType*) pt) || ms_list_find(lc->codecs_conf.video_codecs, (PayloadType*)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);
199 _linphone_core_codec_config_write(lc);
202 ms_error("Enabling codec not in audio or video list of PayloadType !");
206 int linphone_core_get_payload_type_number(LinphoneCore *lc, const PayloadType *pt){
207 return payload_type_get_number(pt);
210 const char *linphone_core_get_payload_type_description(LinphoneCore *lc, PayloadType *pt){
211 if (ms_filter_codec_supported(pt->mime_type)){
212 MSFilterDesc *desc=ms_filter_get_encoder(pt->mime_type);
214 return dgettext("mediastreamer",desc->text);
223 /*this function makes a special case for speex/8000.
224 This codec is variable bitrate. The 8kbit/s mode is interesting when having a low upload bandwidth, but its quality
225 is not very good. We 'd better use its 15kbt/s mode when we have enough bandwidth*/
226 static int get_codec_bitrate(LinphoneCore *lc, const PayloadType *pt){
227 int upload_bw=linphone_core_get_upload_bandwidth(lc);
228 if (bandwidth_is_greater(upload_bw,129) || (bandwidth_is_greater(upload_bw,33) && !linphone_core_video_enabled(lc)) ) {
229 if (strcmp(pt->mime_type,"speex")==0 && pt->clock_rate==8000){
233 return pt->normal_bitrate;
236 static double get_audio_payload_bandwidth(LinphoneCore *lc, const PayloadType *pt){
240 bitrate=get_codec_bitrate(lc,pt);
241 packet_size= (((double)bitrate)/(50*8))+UDP_HDR_SZ+RTP_HDR_SZ+IP4_HDR_SZ;
242 return packet_size*8.0*npacket;
245 void linphone_core_update_allocated_audio_bandwidth_in_call(LinphoneCall *call, const PayloadType *pt){
246 call->audio_bw=(int)(get_audio_payload_bandwidth(call->core,pt)/1000.0);
247 ms_message("Audio bandwidth for this call is %i",call->audio_bw);
250 void linphone_core_update_allocated_audio_bandwidth(LinphoneCore *lc){
252 PayloadType *max=NULL;
253 for(elem=linphone_core_get_audio_codecs(lc);elem!=NULL;elem=elem->next){
254 PayloadType *pt=(PayloadType*)elem->data;
255 if (payload_type_enabled(pt)){
256 int pt_bitrate=get_codec_bitrate(lc,pt);
257 if (max==NULL) max=pt;
258 else if (max->normal_bitrate<pt_bitrate){
264 lc->audio_bw=(int)(get_audio_payload_bandwidth(lc,max)/1000.0);
268 bool_t linphone_core_is_payload_type_usable_for_bandwidth(LinphoneCore *lc, PayloadType *pt, int bandwidth_limit)
274 case PAYLOAD_AUDIO_CONTINUOUS:
275 case PAYLOAD_AUDIO_PACKETIZED:
276 codec_band=get_audio_payload_bandwidth(lc,pt);
277 ret=bandwidth_is_greater(bandwidth_limit*1000,codec_band);
278 /*hack to avoid using uwb codecs when having low bitrate and video*/
279 if (bandwidth_is_greater(199,bandwidth_limit)){
280 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
284 //ms_message("Payload %s: %g",pt->mime_type,codec_band);
287 if (bandwidth_limit!=0) {/* infinite (-1) or strictly positive*/
296 /* return TRUE if codec can be used with bandwidth, FALSE else*/
297 bool_t linphone_core_check_payload_type_usability(LinphoneCore *lc, PayloadType *pt)
300 int allowed_bw,video_bw;
303 linphone_core_update_allocated_audio_bandwidth(lc);
304 allowed_bw=get_min_bandwidth(linphone_core_get_download_bandwidth(lc),
305 linphone_core_get_upload_bandwidth(lc));
308 video_bw=1500; /*around 1.5 Mbit/s*/
310 video_bw=get_video_bandwidth(allowed_bw,lc->audio_bw);
313 case PAYLOAD_AUDIO_CONTINUOUS:
314 case PAYLOAD_AUDIO_PACKETIZED:
315 codec_band=get_audio_payload_bandwidth(lc,pt);
316 ret=bandwidth_is_greater(allowed_bw*1000,codec_band);
317 /*hack to avoid using uwb codecs when having low bitrate and video*/
318 if (bandwidth_is_greater(199,allowed_bw)){
319 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
323 //ms_message("Payload %s: %g",pt->mime_type,codec_band);
327 pt->normal_bitrate=video_bw*1000;
336 bool_t lp_spawn_command_line_sync(const char *command, char **result,int *command_ret){
337 #if !defined(_WIN32_WCE)
338 FILE *f=popen(command,"r");
341 *result=ms_malloc(4096);
342 err=fread(*result,1,4096-1,f);
344 ms_warning("Error reading command output:%s",strerror(errno));
350 if (command_ret!=NULL) *command_ret=err;
353 #endif /*_WIN32_WCE*/
357 static ortp_socket_t create_socket(int local_port){
358 struct sockaddr_in laddr;
361 sock=socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
363 ms_error("Fail to create socket");
366 memset (&laddr,0,sizeof(laddr));
367 laddr.sin_family=AF_INET;
368 laddr.sin_addr.s_addr=INADDR_ANY;
369 laddr.sin_port=htons(local_port);
370 if (bind(sock,(struct sockaddr*)&laddr,sizeof(laddr))<0){
371 ms_error("Bind socket to 0.0.0.0:%i failed: %s",local_port,getSocketError());
376 if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
377 (SOCKET_OPTION_VALUE)&optval, sizeof (optval))<0){
378 ms_warning("Fail to set SO_REUSEADDR");
380 set_non_blocking_socket(sock);
384 static int sendStunRequest(int sock, const struct sockaddr *server, socklen_t addrlen, int id, bool_t changeAddr){
385 char buf[STUN_MAX_MESSAGE_SIZE];
386 int len = STUN_MAX_MESSAGE_SIZE;
387 StunAtrString username;
388 StunAtrString password;
391 memset(&req, 0, sizeof(StunMessage));
392 memset(&username,0,sizeof(username));
393 memset(&password,0,sizeof(password));
394 stunBuildReqSimple( &req, &username, changeAddr , changeAddr , id);
395 len = stunEncodeMessage( &req, buf, len, &password);
397 ms_error("Fail to encode stun message.");
400 err=sendto(sock,buf,len,0,server,addrlen);
402 ms_error("sendto failed: %s",strerror(errno));
408 int parse_hostname_to_addr(const char *server, struct sockaddr_storage *ss, socklen_t *socklen){
409 struct addrinfo hints,*res=NULL;
412 char host[NI_MAXHOST];
414 host[NI_MAXHOST-1]='\0';
415 strncpy(host,server,sizeof(host)-1);
421 memset(&hints,0,sizeof(hints));
422 hints.ai_family=PF_INET;
423 hints.ai_socktype=SOCK_DGRAM;
424 hints.ai_protocol=IPPROTO_UDP;
425 ret=getaddrinfo(host,port,&hints,&res);
427 ms_error("getaddrinfo() failed for %s:%s : %s",host,port,gai_strerror(ret));
431 memcpy(ss,res->ai_addr,res->ai_addrlen);
432 *socklen=res->ai_addrlen;
437 static int recvStunResponse(ortp_socket_t sock, char *ipaddr, int *port, int *id){
438 char buf[STUN_MAX_MESSAGE_SIZE];
439 int len = STUN_MAX_MESSAGE_SIZE;
441 len=recv(sock,buf,len,0);
444 stunParseMessage(buf,len, &resp );
445 *id=resp.msgHdr.tr_id.octet[0];
446 if (resp.hasXorMappedAddress){
447 *port = resp.xorMappedAddress.ipv4.port;
448 ia.s_addr=htonl(resp.xorMappedAddress.ipv4.addr);
449 }else if (resp.hasMappedAddress){
450 *port = resp.mappedAddress.ipv4.port;
451 ia.s_addr=htonl(resp.mappedAddress.ipv4.addr);
453 strncpy(ipaddr,inet_ntoa(ia),LINPHONE_IPADDR_SIZE);
458 void linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){
459 const char *server=linphone_core_get_stun_server(lc);
461 if (lc->sip_conf.ipv6_enabled){
462 ms_warning("stun support is not implemented for ipv6");
466 struct sockaddr_storage ss;
468 ortp_socket_t sock1=-1, sock2=-1;
470 bool_t video_enabled=linphone_core_video_enabled(lc);
471 bool_t got_audio,got_video;
472 bool_t cone_audio=FALSE,cone_video=FALSE;
473 struct timeval init,cur;
474 SalEndpointCandidate *ac,*vc;
476 ac=&call->localdesc->streams[0].candidates[0];
477 vc=&call->localdesc->streams[1].candidates[0];
479 if (parse_hostname_to_addr(server,&ss,&ss_len)<0){
480 ms_error("Fail to parser stun server address: %s",server);
483 if (lc->vtable.display_status!=NULL)
484 lc->vtable.display_status(lc,_("Stun lookup in progress..."));
486 /*create the two audio and video RTP sockets, and send STUN message to our stun server */
487 sock1=create_socket(call->audio_port);
488 if (sock1==-1) return;
490 sock2=create_socket(call->video_port);
491 if (sock2==-1) return ;
495 gettimeofday(&init,NULL);
500 ms_message("Sending stun requests...");
501 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,11,TRUE);
502 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,1,FALSE);
504 sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,22,TRUE);
505 sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,2,FALSE);
514 if (recvStunResponse(sock1,ac->addr,
516 ms_message("STUN test result: local audio port maps to %s:%i",
523 if (recvStunResponse(sock2,vc->addr,
525 ms_message("STUN test result: local video port maps to %s:%i",
532 gettimeofday(&cur,NULL);
533 elapsed=((cur.tv_sec-init.tv_sec)*1000.0) + ((cur.tv_usec-init.tv_usec)/1000.0);
535 ms_message("Stun responses timeout, going ahead.");
539 }while(!(got_audio && (got_video||sock2==-1) ) );
541 ms_error("No stun server response for audio port.");
544 ms_message("NAT is symmetric for audio port");
549 ms_error("No stun server response for video port.");
552 ms_message("NAT is symmetric for video port.");
556 if ((ac->addr[0]!='\0' && vc->addr[0]!='\0' && strcmp(ac->addr,vc->addr)==0)
558 strcpy(call->localdesc->addr,ac->addr);
561 if (sock2!=-1) close_socket(sock2);
565 void linphone_core_gather_ice_candidates(LinphoneCore *lc, LinphoneCall *call)
571 ortp_socket_t audio_socks[2];
572 ortp_socket_t video_socks[2];
573 bool_t audio_responses[2];
574 bool_t video_responses[2];
575 IceCandidate *audio_ice_bases[2];
576 IceCandidate *video_ice_bases[2];
577 IceCheckList *audio_check_list;
578 IceCheckList *video_check_list;
579 IceSession *ice_session = sal_op_get_ice_session(call->op);
580 struct sockaddr_storage ss;
582 struct timeval init, cur;
585 const char *server = linphone_core_get_stun_server(lc);
587 if ((server == NULL) || (ice_session == NULL)) return;
588 audio_check_list = ice_session_check_list(ice_session, 0);
589 video_check_list = ice_session_check_list(ice_session, 1);
590 if (audio_check_list == NULL) return;
592 if (lc->sip_conf.ipv6_enabled){
593 ms_warning("stun support is not implemented for ipv6");
597 if (parse_hostname_to_addr(server, &ss, &ss_len) < 0) {
598 ms_error("Fail to parser stun server address: %s", server);
601 if (lc->vtable.display_status != NULL)
602 lc->vtable.display_status(lc, _("ICE local candidates gathering in progress..."));
604 audio_responses[0] = audio_responses[1] = FALSE;
605 video_responses[0] = video_responses[1] = FALSE;
606 audio_ice_bases[0] = audio_ice_bases[1] = NULL;
607 video_ice_bases[0] = video_ice_bases[1] = NULL;
608 audio_socks[0] = create_socket(call->audio_port);
609 if (audio_socks[0] == -1) return;
610 audio_socks[1] = create_socket(call->audio_port + 1);
611 if (audio_socks[1] == -1) return;
612 if (call->params.has_video) {
613 video_socks[0] = create_socket(call->video_port);
614 if (video_socks[0] == -1) return;
615 video_socks[1] = create_socket(call->video_port + 1);
616 if (video_socks[1] == -1) return;
618 video_socks[0] = video_socks[1] = -1;
620 if (linphone_core_get_local_ip_for(AF_INET, NULL, local_addr) < 0) {
621 ms_error("Fail to get local ip");
624 audio_ice_bases[0] = ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port, 1, NULL);
625 audio_ice_bases[1] = ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port + 1, 2, NULL);
626 if (call->params.has_video && (video_check_list != NULL)) {
627 video_ice_bases[0] = ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port, 1, NULL);
628 video_ice_bases[1] = ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port + 1, 2, NULL);
631 gettimeofday(&init, NULL);
633 if (loops % 20 == 0) {
634 ms_message("Sending stun requests...");
635 if (audio_responses[0] == FALSE) sendStunRequest(audio_socks[0], (struct sockaddr*)&ss, ss_len, 1, FALSE);
636 if (audio_responses[1] == FALSE) sendStunRequest(audio_socks[1], (struct sockaddr*)&ss, ss_len, 1, FALSE);
637 if (call->params.has_video) {
638 if (video_responses[0] == FALSE) sendStunRequest(video_socks[0], (struct sockaddr*)&ss, ss_len, 2, FALSE);
639 if (video_responses[1] == FALSE) sendStunRequest(video_socks[1], (struct sockaddr*)&ss, ss_len, 2, FALSE);
648 if (recvStunResponse(audio_socks[0], addr, &port, &id) > 0) {
649 ice_add_local_candidate(audio_check_list, "srflx", addr, port, 1, audio_ice_bases[0]);
650 audio_responses[0] = TRUE;
652 if (recvStunResponse(audio_socks[1], addr, &port, &id) > 0) {
653 ice_add_local_candidate(audio_check_list, "srflx", addr, port, 2, audio_ice_bases[1]);
654 audio_responses[1] = TRUE;
656 if (call->params.has_video && (video_check_list != NULL)) {
657 if (recvStunResponse(video_socks[0], addr, &port, &id) > 0) {
658 ice_add_local_candidate(video_check_list, "srflx", addr, port, 1, video_ice_bases[0]);
659 video_responses[0] = TRUE;
661 if (recvStunResponse(video_socks[1], addr, &port, &id) > 0) {
662 ice_add_local_candidate(video_check_list, "srflx", addr, port, 2, video_ice_bases[1]);
663 video_responses[1] = TRUE;
667 gettimeofday(&cur, NULL);
668 elapsed = ((cur.tv_sec - init.tv_sec) * 1000.0) + ((cur.tv_usec - init.tv_usec) / 1000.0);
669 if (elapsed > 2000) {
670 ms_message("Stun responses timeout, going ahead.");
674 } while (!((audio_responses[0] == TRUE) && (audio_responses[1] == TRUE)
675 && (!call->params.has_video || ((video_responses[0] == TRUE) && (video_responses[1] == TRUE)))));
677 ice_session_compute_candidates_foundations(ice_session);
678 ice_session_choose_default_candidates(ice_session);
680 close_socket(audio_socks[0]);
681 close_socket(audio_socks[1]);
682 ice_dump_candidates(audio_check_list);
683 if (call->params.has_video && (video_check_list != NULL)) {
684 if (video_socks[0] != -1) close_socket(video_socks[0]);
685 if (video_socks[1] != -1) close_socket(video_socks[1]);
686 ice_dump_candidates(video_check_list);
690 LinphoneCall * is_a_linphone_call(void *user_pointer){
691 LinphoneCall *call=(LinphoneCall*)user_pointer;
692 if (call==NULL) return NULL;
693 return call->magic==linphone_call_magic ? call : NULL;
696 LinphoneProxyConfig * is_a_linphone_proxy_config(void *user_pointer){
697 LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)user_pointer;
698 if (cfg==NULL) return NULL;
699 return cfg->magic==linphone_proxy_config_magic ? cfg : NULL;
703 #ifdef HAVE_GETIFADDRS
706 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
709 struct ifaddrs *ifpstart;
712 if (getifaddrs(&ifpstart) < 0) {
716 for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
717 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
718 && (ifp->ifa_flags & IFF_RUNNING) && !(ifp->ifa_flags & IFF_LOOPBACK))
720 getnameinfo(ifp->ifa_addr,
722 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
723 address, size, NULL, 0, NI_NUMERICHOST);
724 if (strchr(address, '%') == NULL) { /*avoid ipv6 link-local addresses */
725 /*ms_message("getifaddrs() found %s",address);*/
731 freeifaddrs(ifpstart);
737 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
739 struct addrinfo hints;
740 struct addrinfo *res=NULL;
741 struct sockaddr_storage addr;
742 struct sockaddr *p_addr=(struct sockaddr*)&addr;
746 memset(&hints,0,sizeof(hints));
747 hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
748 hints.ai_socktype=SOCK_DGRAM;
749 /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
750 err=getaddrinfo(dest,"5060",&hints,&res);
752 ms_error("getaddrinfo() error: %s",gai_strerror(err));
756 ms_error("bug: getaddrinfo returned nothing.");
759 sock=socket(res->ai_family,SOCK_DGRAM,0);
761 err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
763 ms_warning("Error in setsockopt: %s",strerror(errno));
765 err=connect(sock,res->ai_addr,res->ai_addrlen);
767 ms_error("Error in connect: %s",strerror(errno));
775 err=getsockname(sock,(struct sockaddr*)&addr,&s);
777 ms_error("Error in getsockname: %s",strerror(errno));
781 if (p_addr->sa_family==AF_INET){
782 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
783 if (p_sin->sin_addr.s_addr==0){
788 err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
790 ms_error("getnameinfo error: %s",strerror(errno));
793 ms_message("Local interface to reach %s is %s.",dest,result);
797 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
798 strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
799 #ifdef HAVE_GETIFADDRS
801 /*we use getifaddrs for lookup of default interface */
804 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
807 }else if (found_ifs<=0){
808 /*absolutely no network on this machine */
813 /*else use connect to find the best local ip address */
815 dest="87.98.157.38"; /*a public IP address*/
816 else dest="2a00:1450:8002::68";
817 return get_local_ip_for_with_connect(type,dest,result);
826 void _linphone_core_configure_resolver(){
827 /*bionic declares _res but does not define nor export it !!*/
829 /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
830 setenv("RES_OPTIONS","timeout:2 attempts:2 retrans:2 retry:2",1);
833 _res.retrans=2; /*retransmit every two seconds*/
834 _res.retry=2; /*only two times per DNS server*/
840 void _linphone_core_configure_resolver(){