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 struct sockaddr_storage ss;
581 struct timeval init, cur;
584 const char *server = linphone_core_get_stun_server(lc);
586 if (server == NULL) return;
587 if (lc->sip_conf.ipv6_enabled){
588 ms_warning("stun support is not implemented for ipv6");
592 if (parse_hostname_to_addr(server, &ss, &ss_len) < 0) {
593 ms_error("Fail to parser stun server address: %s", server);
596 if (lc->vtable.display_status != NULL)
597 lc->vtable.display_status(lc, _("ICE local candidates gathering in progress..."));
599 audio_responses[0] = audio_responses[1] = FALSE;
600 video_responses[0] = video_responses[1] = FALSE;
601 audio_ice_bases[0] = audio_ice_bases[1] = NULL;
602 video_ice_bases[0] = video_ice_bases[1] = NULL;
603 audio_check_list = call->localdesc->streams[0].ice_check_list;
604 video_check_list = call->localdesc->streams[1].ice_check_list;
605 audio_socks[0] = create_socket(call->audio_port);
606 if (audio_socks[0] == -1) return;
607 audio_socks[1] = create_socket(call->audio_port + 1);
608 if (audio_socks[1] == -1) return;
609 if (call->params.has_video) {
610 video_socks[0] = create_socket(call->video_port);
611 if (video_socks[0] == -1) return;
612 video_socks[1] = create_socket(call->video_port + 1);
613 if (video_socks[1] == -1) return;
615 video_socks[0] = video_socks[1] = -1;
617 if (linphone_core_get_local_ip_for(AF_INET, NULL, local_addr) < 0) {
618 ms_error("Fail to get local ip");
621 audio_ice_bases[0] = ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port, 1, NULL);
622 audio_ice_bases[1] = ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port + 1, 2, NULL);
623 if (call->params.has_video) {
624 video_ice_bases[0] = ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port, 1, NULL);
625 video_ice_bases[1] = ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port + 1, 2, NULL);
628 gettimeofday(&init, NULL);
630 if (loops % 20 == 0) {
631 ms_message("Sending stun requests...");
632 if (audio_responses[0] == FALSE) sendStunRequest(audio_socks[0], (struct sockaddr*)&ss, ss_len, 1, FALSE);
633 if (audio_responses[1] == FALSE) sendStunRequest(audio_socks[1], (struct sockaddr*)&ss, ss_len, 1, FALSE);
634 if (call->params.has_video) {
635 if (video_responses[0] == FALSE) sendStunRequest(video_socks[0], (struct sockaddr*)&ss, ss_len, 2, FALSE);
636 if (video_responses[1] == FALSE) sendStunRequest(video_socks[1], (struct sockaddr*)&ss, ss_len, 2, FALSE);
645 if (recvStunResponse(audio_socks[0], addr, &port, &id) > 0) {
646 ice_add_local_candidate(audio_check_list, "srflx", addr, port, 1, audio_ice_bases[0]);
647 audio_responses[0] = TRUE;
649 if (recvStunResponse(audio_socks[1], addr, &port, &id) > 0) {
650 ice_add_local_candidate(audio_check_list, "srflx", addr, port, 2, audio_ice_bases[1]);
651 audio_responses[1] = TRUE;
653 if (call->params.has_video) {
654 if (recvStunResponse(video_socks[0], addr, &port, &id) > 0) {
655 ice_add_local_candidate(video_check_list, "srflx", addr, port, 1, video_ice_bases[0]);
656 video_responses[0] = TRUE;
658 if (recvStunResponse(video_socks[1], addr, &port, &id) > 0) {
659 ice_add_local_candidate(video_check_list, "srflx", addr, port, 2, video_ice_bases[1]);
660 video_responses[1] = TRUE;
664 gettimeofday(&cur, NULL);
665 elapsed = ((cur.tv_sec - init.tv_sec) * 1000.0) + ((cur.tv_usec - init.tv_usec) / 1000.0);
666 if (elapsed > 2000) {
667 ms_message("Stun responses timeout, going ahead.");
671 } while (!((audio_responses[0] == TRUE) && (audio_responses[1] == TRUE)
672 && (!call->params.has_video || ((video_responses[0] == TRUE) && (video_responses[1] == TRUE)))));
674 ice_session_compute_candidates_foundations(call->ice_session);
675 ice_session_choose_default_candidates(call->ice_session);
677 close_socket(audio_socks[0]);
678 close_socket(audio_socks[1]);
679 ice_dump_candidates(audio_check_list);
680 if (call->params.has_video) {
681 if (video_socks[0] != -1) close_socket(video_socks[0]);
682 if (video_socks[1] != -1) close_socket(video_socks[1]);
683 ice_dump_candidates(video_check_list);
687 LinphoneCall * is_a_linphone_call(void *user_pointer){
688 LinphoneCall *call=(LinphoneCall*)user_pointer;
689 if (call==NULL) return NULL;
690 return call->magic==linphone_call_magic ? call : NULL;
693 LinphoneProxyConfig * is_a_linphone_proxy_config(void *user_pointer){
694 LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)user_pointer;
695 if (cfg==NULL) return NULL;
696 return cfg->magic==linphone_proxy_config_magic ? cfg : NULL;
700 #ifdef HAVE_GETIFADDRS
703 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
706 struct ifaddrs *ifpstart;
709 if (getifaddrs(&ifpstart) < 0) {
713 for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
714 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
715 && (ifp->ifa_flags & IFF_RUNNING) && !(ifp->ifa_flags & IFF_LOOPBACK))
717 getnameinfo(ifp->ifa_addr,
719 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
720 address, size, NULL, 0, NI_NUMERICHOST);
721 if (strchr(address, '%') == NULL) { /*avoid ipv6 link-local addresses */
722 /*ms_message("getifaddrs() found %s",address);*/
728 freeifaddrs(ifpstart);
734 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
736 struct addrinfo hints;
737 struct addrinfo *res=NULL;
738 struct sockaddr_storage addr;
739 struct sockaddr *p_addr=(struct sockaddr*)&addr;
743 memset(&hints,0,sizeof(hints));
744 hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
745 hints.ai_socktype=SOCK_DGRAM;
746 /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
747 err=getaddrinfo(dest,"5060",&hints,&res);
749 ms_error("getaddrinfo() error: %s",gai_strerror(err));
753 ms_error("bug: getaddrinfo returned nothing.");
756 sock=socket(res->ai_family,SOCK_DGRAM,0);
758 err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
760 ms_warning("Error in setsockopt: %s",strerror(errno));
762 err=connect(sock,res->ai_addr,res->ai_addrlen);
764 ms_error("Error in connect: %s",strerror(errno));
772 err=getsockname(sock,(struct sockaddr*)&addr,&s);
774 ms_error("Error in getsockname: %s",strerror(errno));
778 if (p_addr->sa_family==AF_INET){
779 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
780 if (p_sin->sin_addr.s_addr==0){
785 err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
787 ms_error("getnameinfo error: %s",strerror(errno));
790 ms_message("Local interface to reach %s is %s.",dest,result);
794 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
795 strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
796 #ifdef HAVE_GETIFADDRS
798 /*we use getifaddrs for lookup of default interface */
801 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
804 }else if (found_ifs<=0){
805 /*absolutely no network on this machine */
810 /*else use connect to find the best local ip address */
812 dest="87.98.157.38"; /*a public IP address*/
813 else dest="2a00:1450:8002::68";
814 return get_local_ip_for_with_connect(type,dest,result);
823 void _linphone_core_configure_resolver(){
824 /*bionic declares _res but does not define nor export it !!*/
826 /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
827 setenv("RES_OPTIONS","timeout:2 attempts:2 retrans:2 retry:2",1);
830 _res.retrans=2; /*retransmit every two seconds*/
831 _res.retry=2; /*only two times per DNS server*/
837 void _linphone_core_configure_resolver(){