sjero.net Git - linphone/blob - coreapi/misc.c

   1
   2 /*
   3 linphone
   4 Copyright (C) 2000  Simon MORLAT (simon.morlat@linphone.org)
   5
   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.
  10
  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.
  15
  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.
  19 */
  20
  21 #include "private.h"
  22 #include "lpconfig.h"
  23 #include "mediastreamer2/mediastream.h"
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #ifdef HAVE_SIGHANDLER_T
  27 #include <signal.h>
  28 #endif /*HAVE_SIGHANDLER_T*/
  29
  30 #include <string.h>
  31 #if !defined(_WIN32_WCE)
  32 #include <errno.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <unistd.h>
  36 #include <fcntl.h>
  37 #endif /*_WIN32_WCE*/
  38
  39 #undef snprintf
  40 #include <ortp/stun.h>
  41
  42 #ifdef HAVE_GETIFADDRS
  43 #include <net/if.h>
  44 #include <ifaddrs.h>
  45 #endif
  46
  47
  48 #if !defined(WIN32)
  49
  50 static char lock_name[80];
  51 static char lock_set=0;
  52 /* put a lock file in /tmp. this is called when linphone runs as a daemon*/
  53 int set_lock_file()
  54 {
  55         FILE *lockfile;
  56
  57         snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
  58         lockfile=fopen(lock_name,"w");
  59         if (lockfile==NULL)
  60         {
  61                 printf("Failed to create lock file.\n");
  62                 return(-1);
  63         }
  64         fprintf(lockfile,"%i",getpid());
  65         fclose(lockfile);
  66         lock_set=1;
  67         return(0);
  68 }
  69
  70 /* looks if there is a lock file. If presents return its content (the pid of the already running linphone), if not found, returns -1*/
  71 int get_lock_file()
  72 {
  73         int pid;
  74         FILE *lockfile;
  75
  76         snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
  77         lockfile=fopen(lock_name,"r");
  78         if (lockfile==NULL)
  79                 return(-1);
  80         if (fscanf(lockfile,"%i",&pid)!=1){
  81                 ms_warning("Could not read pid in lock file.");
  82                 fclose(lockfile);
  83                 return -1;
  84         }
  85         fclose(lockfile);
  86         return pid;
  87 }
  88
  89 /* remove the lock file if it was set*/
  90 int remove_lock_file()
  91 {
  92         int err=0;
  93         if (lock_set)
  94         {
  95                 err=unlink(lock_name);
  96                 lock_set=0;
  97         }
  98         return(err);
  99 }
 100
 101 #endif
 102
 103 char *int2str(int number)
 104 {
 105         char *numstr=ms_malloc(10);
 106         snprintf(numstr,10,"%i",number);
 107         return numstr;
 108 }
 109
 110 void check_sound_device(LinphoneCore *lc)
 111 {
 112 #ifdef _linux
 113         int fd=0;
 114         int len;
 115         int a;
 116         char *file=NULL;
 117         char *i810_audio=NULL;
 118         char *snd_pcm_oss=NULL;
 119         char *snd_mixer_oss=NULL;
 120         char *snd_pcm=NULL;
 121         fd=open("/proc/modules",O_RDONLY);
 122
 123         if (fd>0){
 124                 /* read the entire /proc/modules file and check if sound conf seems correct */
 125                 /*a=fstat(fd,&statbuf);
 126                 if (a<0) ms_warning("Can't stat /proc/modules:%s.",strerror(errno));
 127                 len=statbuf.st_size;
 128                 if (len==0) ms_warning("/proc/modules has zero size!");
 129                 */
 130                 /***** fstat does not work on /proc/modules for unknown reason *****/
 131                 len=6000;
 132                 file=ms_malloc(len+1);
 133                 a=read(fd,file,len);
 134                 if (a<len) file=ms_realloc(file,a+1);
 135                 file[a]='\0';
 136                 i810_audio=strstr(file,"i810_audio");
 137                 if (i810_audio!=NULL){
 138                         /* I'm sorry i put this warning in comments because
 139                          * i don't use yet the right driver !! */
 140 /*                      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."));*/
 141                         goto end;
 142                 }
 143                 snd_pcm=strstr(file,"snd-pcm");
 144                 if (snd_pcm!=NULL){
 145                         snd_pcm_oss=strstr(file,"snd-pcm-oss");
 146                         snd_mixer_oss=strstr(file,"snd-mixer-oss");
 147                         if (snd_pcm_oss==NULL){
 148                                 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                         }
 150                         if (snd_mixer_oss==NULL){
 151                                 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."));
 152                         }
 153                 }
 154         }else {
 155
 156                 ms_warning("Could not open /proc/modules.");
 157         }
 158         /* now check general volume. Some user forget to rise it and then complain that linphone is
 159         not working */
 160         /* but some other users complain that linphone should not change levels...
 161         if (lc->sound_conf.sndcard!=NULL){
 162                 a=snd_card_get_level(lc->sound_conf.sndcard,SND_CARD_LEVEL_GENERAL);
 163                 if (a<50){
 164                         ms_warning("General level is quite low (%i). Linphone rises it up for you.",a);
 165                         snd_card_set_level(lc->sound_conf.sndcard,SND_CARD_LEVEL_GENERAL,80);
 166                 }
 167         }
 168         */
 169         end:
 170         if (file!=NULL) ms_free(file);
 171         if (fd>0) close(fd);
 172 #endif
 173 }
 174
 175 #define UDP_HDR_SZ 8
 176 #define RTP_HDR_SZ 12
 177 #define IP4_HDR_SZ 20   /*20 is the minimum, but there may be some options*/
 178
 179 static void payload_type_set_enable(PayloadType *pt,int value)
 180 {
 181         if ((value)!=0) payload_type_set_flag(pt,PAYLOAD_TYPE_ENABLED); \
 182         else payload_type_unset_flag(pt,PAYLOAD_TYPE_ENABLED);
 183 }
 184
 185 static bool_t payload_type_enabled(const PayloadType *pt) {
 186         return (((pt)->flags & PAYLOAD_TYPE_ENABLED)!=0);
 187 }
 188
 189 bool_t linphone_core_payload_type_enabled(LinphoneCore *lc, const PayloadType *pt){
 190         if (ms_list_find(lc->codecs_conf.audio_codecs, (PayloadType*) pt) || ms_list_find(lc->codecs_conf.video_codecs, (PayloadType*)pt)){
 191                 return payload_type_enabled(pt);
 192         }
 193         ms_error("Getting enablement status of codec not in audio or video list of PayloadType !");
 194         return FALSE;
 195 }
 196
 197 int linphone_core_enable_payload_type(LinphoneCore *lc, PayloadType *pt, bool_t enabled){
 198         if (ms_list_find(lc->codecs_conf.audio_codecs,pt) || ms_list_find(lc->codecs_conf.video_codecs,pt)){
 199                 payload_type_set_enable(pt,enabled);
 200                 _linphone_core_codec_config_write(lc);
 201                 return 0;
 202         }
 203         ms_error("Enabling codec not in audio or video list of PayloadType !");
 204         return -1;
 205 }
 206
 207 int linphone_core_get_payload_type_number(LinphoneCore *lc, const PayloadType *pt){
 208        return payload_type_get_number(pt);
 209 }
 210
 211 const char *linphone_core_get_payload_type_description(LinphoneCore *lc, PayloadType *pt){
 212         if (ms_filter_codec_supported(pt->mime_type)){
 213                 MSFilterDesc *desc=ms_filter_get_encoder(pt->mime_type);
 214 #ifdef ENABLE_NLS
 215                 return dgettext("mediastreamer",desc->text);
 216 #else
 217                 return desc->text;
 218 #endif
 219         }
 220         return NULL;
 221 }
 222
 223
 224 /*this function makes a special case for speex/8000.
 225 This codec is variable bitrate. The 8kbit/s mode is interesting when having a low upload bandwidth, but its quality
 226 is not very good. We 'd better use its 15kbt/s mode when we have enough bandwidth*/
 227 static int get_codec_bitrate(LinphoneCore *lc, const PayloadType *pt){
 228         int upload_bw=linphone_core_get_upload_bandwidth(lc);
 229         if (bandwidth_is_greater(upload_bw,129) || (bandwidth_is_greater(upload_bw,33) && !linphone_core_video_enabled(lc)) ) {
 230                 if (strcmp(pt->mime_type,"speex")==0 && pt->clock_rate==8000){
 231                         return 15000;
 232                 }
 233         }
 234         return pt->normal_bitrate;
 235 }
 236
 237 static double get_audio_payload_bandwidth(LinphoneCore *lc, const PayloadType *pt){
 238         double npacket=50;
 239         double packet_size;
 240         int bitrate;
 241         bitrate=get_codec_bitrate(lc,pt);
 242         packet_size= (((double)bitrate)/(50*8))+UDP_HDR_SZ+RTP_HDR_SZ+IP4_HDR_SZ;
 243         return packet_size*8.0*npacket;
 244 }
 245
 246 void linphone_core_update_allocated_audio_bandwidth_in_call(LinphoneCall *call, const PayloadType *pt){
 247         call->audio_bw=(int)(get_audio_payload_bandwidth(call->core,pt)/1000.0);
 248         ms_message("Audio bandwidth for this call is %i",call->audio_bw);
 249 }
 250
 251 void linphone_core_update_allocated_audio_bandwidth(LinphoneCore *lc){
 252         const MSList *elem;
 253         PayloadType *max=NULL;
 254         for(elem=linphone_core_get_audio_codecs(lc);elem!=NULL;elem=elem->next){
 255                 PayloadType *pt=(PayloadType*)elem->data;
 256                 if (payload_type_enabled(pt)){
 257                         int pt_bitrate=get_codec_bitrate(lc,pt);
 258                         if (max==NULL) max=pt;
 259                         else if (max->normal_bitrate<pt_bitrate){
 260                                 max=pt;
 261                         }
 262                 }
 263         }
 264         if (max) {
 265                 lc->audio_bw=(int)(get_audio_payload_bandwidth(lc,max)/1000.0);
 266         }
 267 }
 268
 269 bool_t linphone_core_is_payload_type_usable_for_bandwidth(LinphoneCore *lc, PayloadType *pt,  int bandwidth_limit)
 270 {
 271         double codec_band;
 272         bool_t ret=FALSE;
 273
 274         switch (pt->type){
 275                 case PAYLOAD_AUDIO_CONTINUOUS:
 276                 case PAYLOAD_AUDIO_PACKETIZED:
 277                         codec_band=get_audio_payload_bandwidth(lc,pt);
 278                         ret=bandwidth_is_greater(bandwidth_limit*1000,codec_band);
 279                         /*hack to avoid using uwb codecs when having low bitrate and video*/
 280                         if (bandwidth_is_greater(199,bandwidth_limit)){
 281                                 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
 282                                         ret=FALSE;
 283                                 }
 284                         }
 285                         //ms_message("Payload %s: %g",pt->mime_type,codec_band);
 286                         break;
 287                 case PAYLOAD_VIDEO:
 288                         if (bandwidth_limit!=0) {/* infinite (-1) or strictly positive*/
 289                                 ret=TRUE;
 290                         }
 291                         else ret=FALSE;
 292                         break;
 293         }
 294         return ret;
 295 }
 296
 297 /* return TRUE if codec can be used with bandwidth, FALSE else*/
 298 bool_t linphone_core_check_payload_type_usability(LinphoneCore *lc, PayloadType *pt)
 299 {
 300         double codec_band;
 301         int allowed_bw,video_bw;
 302         bool_t ret=FALSE;
 303
 304         linphone_core_update_allocated_audio_bandwidth(lc);
 305         allowed_bw=get_min_bandwidth(linphone_core_get_download_bandwidth(lc),
 306                                         linphone_core_get_upload_bandwidth(lc));
 307         if (allowed_bw==0) {
 308                 allowed_bw=-1;
 309                 video_bw=1500; /*around 1.5 Mbit/s*/
 310         }else
 311                 video_bw=get_video_bandwidth(allowed_bw,lc->audio_bw);
 312
 313         switch (pt->type){
 314                 case PAYLOAD_AUDIO_CONTINUOUS:
 315                 case PAYLOAD_AUDIO_PACKETIZED:
 316                         codec_band=get_audio_payload_bandwidth(lc,pt);
 317                         ret=bandwidth_is_greater(allowed_bw*1000,codec_band);
 318                         /*hack to avoid using uwb codecs when having low bitrate and video*/
 319                         if (bandwidth_is_greater(199,allowed_bw)){
 320                                 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
 321                                         ret=FALSE;
 322                                 }
 323                         }
 324                         //ms_message("Payload %s: %g",pt->mime_type,codec_band);
 325                         break;
 326                 case PAYLOAD_VIDEO:
 327                         if (video_bw>0){
 328                                 pt->normal_bitrate=video_bw*1000;
 329                                 ret=TRUE;
 330                         }
 331                         else ret=FALSE;
 332                         break;
 333         }
 334         return ret;
 335 }
 336
 337 bool_t lp_spawn_command_line_sync(const char *command, char **result,int *command_ret){
 338 #if !defined(_WIN32_WCE)
 339         FILE *f=popen(command,"r");
 340         if (f!=NULL){
 341                 int err;
 342                 *result=ms_malloc(4096);
 343                 err=fread(*result,1,4096-1,f);
 344                 if (err<0){
 345                         ms_warning("Error reading command output:%s",strerror(errno));
 346                         ms_free(result);
 347                         return FALSE;
 348                 }
 349                 (*result)[err]=0;
 350                 err=pclose(f);
 351                 if (command_ret!=NULL) *command_ret=err;
 352                 return TRUE;
 353         }
 354 #endif /*_WIN32_WCE*/
 355         return FALSE;
 356 }
 357
 358 static ortp_socket_t create_socket(int local_port){
 359         struct sockaddr_in laddr;
 360         ortp_socket_t sock;
 361         int optval;
 362         sock=socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
 363         if (sock<0) {
 364                 ms_error("Fail to create socket");
 365                 return -1;
 366         }
 367         memset (&laddr,0,sizeof(laddr));
 368         laddr.sin_family=AF_INET;
 369         laddr.sin_addr.s_addr=INADDR_ANY;
 370         laddr.sin_port=htons(local_port);
 371         if (bind(sock,(struct sockaddr*)&laddr,sizeof(laddr))<0){
 372                 ms_error("Bind socket to 0.0.0.0:%i failed: %s",local_port,getSocketError());
 373                 close_socket(sock);
 374                 return -1;
 375         }
 376         optval=1;
 377         if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
 378                                 (SOCKET_OPTION_VALUE)&optval, sizeof (optval))<0){
 379                 ms_warning("Fail to set SO_REUSEADDR");
 380         }
 381         set_non_blocking_socket(sock);
 382         return sock;
 383 }
 384
 385 static int sendStunRequest(int sock, const struct sockaddr *server, socklen_t addrlen, int id, bool_t changeAddr){
 386         char buf[STUN_MAX_MESSAGE_SIZE];
 387         int len = STUN_MAX_MESSAGE_SIZE;
 388         StunAtrString username;
 389         StunAtrString password;
 390         StunMessage req;
 391         int err;
 392         memset(&req, 0, sizeof(StunMessage));
 393         memset(&username,0,sizeof(username));
 394         memset(&password,0,sizeof(password));
 395         stunBuildReqSimple( &req, &username, changeAddr , changeAddr , id);
 396         len = stunEncodeMessage( &req, buf, len, &password);
 397         if (len<=0){
 398                 ms_error("Fail to encode stun message.");
 399                 return -1;
 400         }
 401         err=sendto(sock,buf,len,0,server,addrlen);
 402         if (err<0){
 403                 ms_error("sendto failed: %s",strerror(errno));
 404                 return -1;
 405         }
 406         return 0;
 407 }
 408
 409 int parse_hostname_to_addr(const char *server, struct sockaddr_storage *ss, socklen_t *socklen){
 410         struct addrinfo hints,*res=NULL;
 411         int family = PF_INET;
 412         int port_int = 3478;
 413         int ret;
 414         char port[6];
 415         char host[NI_MAXHOST];
 416         char *p1, *p2;
 417         if ((sscanf(server, "[%64[^]]]:%d", host, &port_int) == 2) || (sscanf(server, "[%64[^]]]", host) == 1)) {
 418                 family = PF_INET6;
 419         } else {
 420                 p1 = strchr(server, ':');
 421                 p2 = strrchr(server, ':');
 422                 if (p1 && p2 && (p1 != p2)) {
 423                         family = PF_INET6;
 424                         host[NI_MAXHOST-1]='\0';
 425                         strncpy(host, server, sizeof(host) - 1);
 426                 } else if (sscanf(server, "%[^:]:%d", host, &port_int) != 2) {
 427                         host[NI_MAXHOST-1]='\0';
 428                         strncpy(host, server, sizeof(host) - 1);
 429                 }
 430         }
 431         snprintf(port, sizeof(port), "%d", port_int);
 432         memset(&hints,0,sizeof(hints));
 433         hints.ai_family=family;
 434         hints.ai_socktype=SOCK_DGRAM;
 435         hints.ai_protocol=IPPROTO_UDP;
 436         ret=getaddrinfo(host,port,&hints,&res);
 437         if (ret!=0){
 438                 ms_error("getaddrinfo() failed for %s:%s : %s",host,port,gai_strerror(ret));
 439                 return -1;
 440         }
 441         if (!res) return -1;
 442         memcpy(ss,res->ai_addr,res->ai_addrlen);
 443         *socklen=res->ai_addrlen;
 444         freeaddrinfo(res);
 445         return 0;
 446 }
 447
 448 static int recvStunResponse(ortp_socket_t sock, char *ipaddr, int *port, int *id){
 449         char buf[STUN_MAX_MESSAGE_SIZE];
 450         int len = STUN_MAX_MESSAGE_SIZE;
 451         StunMessage resp;
 452         len=recv(sock,buf,len,0);
 453         if (len>0){
 454                 struct in_addr ia;
 455                 stunParseMessage(buf,len, &resp );
 456                 *id=resp.msgHdr.tr_id.octet[0];
 457                 if (resp.hasXorMappedAddress){
 458                         *port = resp.xorMappedAddress.ipv4.port;
 459                         ia.s_addr=htonl(resp.xorMappedAddress.ipv4.addr);
 460                 }else if (resp.hasMappedAddress){
 461                         *port = resp.mappedAddress.ipv4.port;
 462                         ia.s_addr=htonl(resp.mappedAddress.ipv4.addr);
 463                 }else return -1;
 464                 strncpy(ipaddr,inet_ntoa(ia),LINPHONE_IPADDR_SIZE);
 465         }
 466         return len;
 467 }
 468
 469 /* this functions runs a simple stun test and return the number of milliseconds to complete the tests, or -1 if the test were failed.*/
 470 int linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){
 471         const char *server=linphone_core_get_stun_server(lc);
 472         StunCandidate *ac=&call->ac;
 473         StunCandidate *vc=&call->vc;
 474
 475         if (lc->sip_conf.ipv6_enabled){
 476                 ms_warning("stun support is not implemented for ipv6");
 477                 return -1;
 478         }
 479         if (server!=NULL){
 480                 struct sockaddr_storage ss;
 481                 socklen_t ss_len;
 482                 ortp_socket_t sock1=-1, sock2=-1;
 483                 int loops=0;
 484                 bool_t video_enabled=linphone_core_video_enabled(lc);
 485                 bool_t got_audio,got_video;
 486                 bool_t cone_audio=FALSE,cone_video=FALSE;
 487                 struct timeval init,cur;
 488                 double elapsed;
 489                 int ret=0;
 490
 491                 if (parse_hostname_to_addr(server,&ss,&ss_len)<0){
 492                         ms_error("Fail to parser stun server address: %s",server);
 493                         return -1;
 494                 }
 495                 if (lc->vtable.display_status!=NULL)
 496                         lc->vtable.display_status(lc,_("Stun lookup in progress..."));
 497
 498                 /*create the two audio and video RTP sockets, and send STUN message to our stun server */
 499                 sock1=create_socket(call->audio_port);
 500                 if (sock1==-1) return -1;
 501                 if (video_enabled){
 502                         sock2=create_socket(call->video_port);
 503                         if (sock2==-1) return -1;
 504                 }
 505                 got_audio=FALSE;
 506                 got_video=FALSE;
 507                 gettimeofday(&init,NULL);
 508                 do{
 509
 510                         int id;
 511                         if (loops%20==0){
 512                                 ms_message("Sending stun requests...");
 513                                 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,11,TRUE);
 514                                 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,1,FALSE);
 515                                 if (sock2!=-1){
 516                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,22,TRUE);
 517                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,2,FALSE);
 518                                 }
 519                         }
 520 #ifdef WIN32
 521                         Sleep(10);
 522 #else
 523                         usleep(10000);
 524 #endif
 525
 526                         if (recvStunResponse(sock1,ac->addr,
 527                                                 &ac->port,&id)>0){
 528                                 ms_message("STUN test result: local audio port maps to %s:%i",
 529                                                 ac->addr,
 530                                                 ac->port);
 531                                 if (id==11)
 532                                         cone_audio=TRUE;
 533                                 got_audio=TRUE;
 534                         }
 535                         if (recvStunResponse(sock2,vc->addr,
 536                                                         &vc->port,&id)>0){
 537                                 ms_message("STUN test result: local video port maps to %s:%i",
 538                                         vc->addr,
 539                                         vc->port);
 540                                 if (id==22)
 541                                         cone_video=TRUE;
 542                                 got_video=TRUE;
 543                         }
 544                         gettimeofday(&cur,NULL);
 545                         elapsed=((cur.tv_sec-init.tv_sec)*1000.0) +  ((cur.tv_usec-init.tv_usec)/1000.0);
 546                         if (elapsed>2000)  {
 547                                 ms_message("Stun responses timeout, going ahead.");
 548                                 ret=-1;
 549                                 break;
 550                         }
 551                         loops++;
 552                 }while(!(got_audio && (got_video||sock2==-1)  ) );
 553                 if (ret==0) ret=(int)elapsed;
 554                 if (!got_audio){
 555                         ms_error("No stun server response for audio port.");
 556                 }else{
 557                         if (!cone_audio) {
 558                                 ms_message("NAT is symmetric for audio port");
 559                         }
 560                 }
 561                 if (sock2!=-1){
 562                         if (!got_video){
 563                                 ms_error("No stun server response for video port.");
 564                         }else{
 565                                 if (!cone_video) {
 566                                         ms_message("NAT is symmetric for video port.");
 567                                 }
 568                         }
 569                 }
 570                 close_socket(sock1);
 571                 if (sock2!=-1) close_socket(sock2);
 572                 return ret;
 573         }
 574         return -1;
 575 }
 576
 577 void linphone_core_adapt_to_network(LinphoneCore *lc, int ping_time_ms, LinphoneCallParams *params){
 578         if (lp_config_get_int(lc->config,"net","activate_edge_workarounds",0)==1){
 579                 ms_message("Stun server ping time is %i ms",ping_time_ms);
 580                 int threshold=lp_config_get_int(lc->config,"net","edge_ping_time",500);
 581
 582                 if (ping_time_ms>threshold){
 583                         int edge_ptime=lp_config_get_int(lc->config,"net","edge_ptime",100);
 584                         int edge_bw=lp_config_get_int(lc->config,"net","edge_bw",20);
 585                         /* we are in a 2G network*/
 586                         params->up_bw=params->down_bw=edge_bw;
 587                         params->up_ptime=params->down_ptime=edge_ptime;
 588                         params->has_video=FALSE;
 589                         params->low_bandwidth=TRUE;
 590                 }/*else use default settings */
 591         }
 592 }
 593
 594
 595
 596 int linphone_core_gather_ice_candidates(LinphoneCore *lc, LinphoneCall *call)
 597 {
 598         char local_addr[64];
 599         struct sockaddr_storage ss;
 600         socklen_t ss_len;
 601         IceCheckList *audio_check_list;
 602         IceCheckList *video_check_list;
 603         const char *server = linphone_core_get_stun_server(lc);
 604
 605         if ((server == NULL) || (call->ice_session == NULL)) return -1;
 606         audio_check_list = ice_session_check_list(call->ice_session, 0);
 607         video_check_list = ice_session_check_list(call->ice_session, 1);
 608         if (audio_check_list == NULL) return -1;
 609
 610         if (lc->sip_conf.ipv6_enabled){
 611                 ms_warning("stun support is not implemented for ipv6");
 612                 return -1;
 613         }
 614
 615         if (parse_hostname_to_addr(server, &ss, &ss_len) < 0) {
 616                 ms_error("Fail to parser stun server address: %s", server);
 617                 return -1;
 618         }
 619         if (lc->vtable.display_status != NULL)
 620                 lc->vtable.display_status(lc, _("ICE local candidates gathering in progress..."));
 621
 622         /* Gather local host candidates. */
 623         if (linphone_core_get_local_ip_for(AF_INET, server, local_addr) < 0) {
 624                 ms_error("Fail to get local ip");
 625                 return -1;
 626         }
 627         if ((ice_check_list_state(audio_check_list) != ICL_Completed) && (ice_check_list_candidates_gathered(audio_check_list) == FALSE)) {
 628                 ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port, 1, NULL);
 629                 ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port + 1, 2, NULL);
 630                 call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateInProgress;
 631         }
 632         if (call->params.has_video && (video_check_list != NULL)
 633                 && (ice_check_list_state(video_check_list) != ICL_Completed) && (ice_check_list_candidates_gathered(video_check_list) == FALSE)) {
 634                 ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port, 1, NULL);
 635                 ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port + 1, 2, NULL);
 636                 call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateInProgress;
 637         }
 638
 639         ms_message("ICE: gathering candidate from [%s]",server);
 640         /* Gather local srflx candidates. */
 641         ice_session_gather_candidates(call->ice_session, ss, ss_len);
 642         return 0;
 643 }
 644
 645 void linphone_core_update_ice_state_in_call_stats(LinphoneCall *call)
 646 {
 647         IceCheckList *audio_check_list;
 648         IceCheckList *video_check_list;
 649         IceSessionState session_state;
 650
 651         if (call->ice_session == NULL) return;
 652         audio_check_list = ice_session_check_list(call->ice_session, 0);
 653         video_check_list = ice_session_check_list(call->ice_session, 1);
 654         if (audio_check_list == NULL) return;
 655
 656         session_state = ice_session_state(call->ice_session);
 657         if ((session_state == IS_Completed) || ((session_state == IS_Failed) && (ice_session_has_completed_check_list(call->ice_session) == TRUE))) {
 658                 if (ice_check_list_state(audio_check_list) == ICL_Completed) {
 659                         switch (ice_check_list_selected_valid_candidate_type(audio_check_list)) {
 660                                 case ICT_HostCandidate:
 661                                         call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateHostConnection;
 662                                         break;
 663                                 case ICT_ServerReflexiveCandidate:
 664                                 case ICT_PeerReflexiveCandidate:
 665                                         call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateReflexiveConnection;
 666                                         break;
 667                                 case ICT_RelayedCandidate:
 668                                         call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateRelayConnection;
 669                                         break;
 670                         }
 671                 } else {
 672                         call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateFailed;
 673                 }
 674                 if (call->params.has_video && (video_check_list != NULL)) {
 675                         if (ice_check_list_state(video_check_list) == ICL_Completed) {
 676                                 switch (ice_check_list_selected_valid_candidate_type(video_check_list)) {
 677                                         case ICT_HostCandidate:
 678                                                 call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateHostConnection;
 679                                                 break;
 680                                         case ICT_ServerReflexiveCandidate:
 681                                         case ICT_PeerReflexiveCandidate:
 682                                                 call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateReflexiveConnection;
 683                                                 break;
 684                                         case ICT_RelayedCandidate:
 685                                                 call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateRelayConnection;
 686                                                 break;
 687                                 }
 688                         } else {
 689                                 call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateFailed;
 690                         }
 691                 }
 692         } else {
 693                 call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateFailed;
 694                 if (call->params.has_video && (video_check_list != NULL)) {
 695                         call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateFailed;
 696                 }
 697         }
 698 }
 699
 700 void linphone_core_update_local_media_description_from_ice(SalMediaDescription *desc, IceSession *session)
 701 {
 702         const char *rtp_addr, *rtcp_addr;
 703         IceSessionState session_state = ice_session_state(session);
 704         int nb_candidates;
 705         int i, j;
 706         bool_t result;
 707
 708         if (session_state == IS_Completed) {
 709                 desc->ice_completed = TRUE;
 710                 result = ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, 0), &rtp_addr, NULL, NULL, NULL);
 711                 if (result == TRUE) {
 712                         strncpy(desc->addr, rtp_addr, sizeof(desc->addr));
 713                 } else {
 714                         ms_warning("If ICE has completed successfully, rtp_addr should be set!");
 715                 }
 716         }
 717         else {
 718                 desc->ice_completed = FALSE;
 719         }
 720         strncpy(desc->ice_pwd, ice_session_local_pwd(session), sizeof(desc->ice_pwd));
 721         strncpy(desc->ice_ufrag, ice_session_local_ufrag(session), sizeof(desc->ice_ufrag));
 722         for (i = 0; i < desc->nstreams; i++) {
 723                 SalStreamDescription *stream = &desc->streams[i];
 724                 IceCheckList *cl = ice_session_check_list(session, i);
 725                 nb_candidates = 0;
 726                 if (cl == NULL) continue;
 727                 if (ice_check_list_state(cl) == ICL_Completed) {
 728                         stream->ice_completed = TRUE;
 729                         result = ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, i), &rtp_addr, &stream->rtp_port, &rtcp_addr, &stream->rtcp_port);
 730                 } else {
 731                         stream->ice_completed = FALSE;
 732                         result = ice_check_list_default_local_candidate(ice_session_check_list(session, i), &rtp_addr, &stream->rtp_port, &rtcp_addr, &stream->rtcp_port);
 733                 }
 734                 if (result == TRUE) {
 735                         strncpy(stream->rtp_addr, rtp_addr, sizeof(stream->rtp_addr));
 736                         strncpy(stream->rtcp_addr, rtcp_addr, sizeof(stream->rtcp_addr));
 737                 } else {
 738                         memset(stream->rtp_addr, 0, sizeof(stream->rtp_addr));
 739                         memset(stream->rtcp_addr, 0, sizeof(stream->rtcp_addr));
 740                 }
 741                 if ((strlen(ice_check_list_local_pwd(cl)) != strlen(desc->ice_pwd)) || (strcmp(ice_check_list_local_pwd(cl), desc->ice_pwd)))
 742                         strncpy(stream->ice_pwd, ice_check_list_local_pwd(cl), sizeof(stream->ice_pwd));
 743                 else
 744                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 745                 if ((strlen(ice_check_list_local_ufrag(cl)) != strlen(desc->ice_ufrag)) || (strcmp(ice_check_list_local_ufrag(cl), desc->ice_ufrag)))
 746                         strncpy(stream->ice_ufrag, ice_check_list_local_ufrag(cl), sizeof(stream->ice_ufrag));
 747                 else
 748                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 749                 stream->ice_mismatch = ice_check_list_is_mismatch(cl);
 750                 if ((ice_check_list_state(cl) == ICL_Running) || (ice_check_list_state(cl) == ICL_Completed)) {
 751                         memset(stream->ice_candidates, 0, sizeof(stream->ice_candidates));
 752                         for (j = 0; j < MIN(ms_list_size(cl->local_candidates), SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES); j++) {
 753                                 SalIceCandidate *sal_candidate = &stream->ice_candidates[nb_candidates];
 754                                 IceCandidate *ice_candidate = ms_list_nth_data(cl->local_candidates, j);
 755                                 const char *default_addr = NULL;
 756                                 int default_port = 0;
 757                                 if (ice_candidate->componentID == 1) {
 758                                         default_addr = stream->rtp_addr;
 759                                         default_port = stream->rtp_port;
 760                                 } else if (ice_candidate->componentID == 2) {
 761                                         default_addr = stream->rtcp_addr;
 762                                         default_port = stream->rtcp_port;
 763                                 } else continue;
 764                                 if (default_addr[0] == '\0') default_addr = desc->addr;
 765                                 /* Only include the candidates matching the default destination for each component of the stream if the state is Completed as specified in RFC5245 section 9.1.2.2. */
 766                                 if ((ice_check_list_state(cl) == ICL_Completed)
 767                                         && !((ice_candidate->taddr.port == default_port) && (strlen(ice_candidate->taddr.ip) == strlen(default_addr)) && (strcmp(ice_candidate->taddr.ip, default_addr) == 0)))
 768                                         continue;
 769                                 strncpy(sal_candidate->foundation, ice_candidate->foundation, sizeof(sal_candidate->foundation));
 770                                 sal_candidate->componentID = ice_candidate->componentID;
 771                                 sal_candidate->priority = ice_candidate->priority;
 772                                 strncpy(sal_candidate->type, ice_candidate_type(ice_candidate), sizeof(sal_candidate->type));
 773                                 strncpy(sal_candidate->addr, ice_candidate->taddr.ip, sizeof(sal_candidate->addr));
 774                                 sal_candidate->port = ice_candidate->taddr.port;
 775                                 if ((ice_candidate->base != NULL) && (ice_candidate->base != ice_candidate)) {
 776                                         strncpy(sal_candidate->raddr, ice_candidate->base->taddr.ip, sizeof(sal_candidate->raddr));
 777                                         sal_candidate->rport = ice_candidate->base->taddr.port;
 778                                 }
 779                                 nb_candidates++;
 780                         }
 781                 }
 782                 if ((ice_check_list_state(cl) == ICL_Completed) && (ice_session_role(session) == IR_Controlling)) {
 783                         int rtp_port, rtcp_port;
 784                         memset(stream->ice_remote_candidates, 0, sizeof(stream->ice_remote_candidates));
 785                         ice_check_list_selected_valid_remote_candidate(cl, &rtp_addr, &rtp_port, &rtcp_addr, &rtcp_port);
 786                         if ((rtp_addr != NULL) && (rtcp_addr != NULL)) {
 787                                 strncpy(stream->ice_remote_candidates[0].addr, rtp_addr, sizeof(stream->ice_remote_candidates[0].addr));
 788                                 stream->ice_remote_candidates[0].port = rtp_port;
 789                                 strncpy(stream->ice_remote_candidates[1].addr, rtcp_addr, sizeof(stream->ice_remote_candidates[1].addr));
 790                                 stream->ice_remote_candidates[1].port = rtcp_port;
 791                         } else {
 792                                 ms_error("ice: Selected valid remote candidates should be present if the check list is in the Completed state");
 793                         }
 794                 }
 795         }
 796 }
 797
 798 static void get_default_addr_and_port(uint16_t componentID, const SalMediaDescription *md, const SalStreamDescription *stream, const char **addr, int *port)
 799 {
 800         if (componentID == 1) {
 801                 *addr = stream->rtp_addr;
 802                 *port = stream->rtp_port;
 803         } else if (componentID == 2) {
 804                 *addr = stream->rtcp_addr;
 805                 *port = stream->rtcp_port;
 806         } else return;
 807         if ((*addr)[0] == '\0') *addr = md->addr;
 808 }
 809
 810 void linphone_core_update_ice_from_remote_media_description(LinphoneCall *call, const SalMediaDescription *md)
 811 {
 812         bool_t ice_restarted = FALSE;
 813
 814         if ((md->ice_pwd[0] != '\0') && (md->ice_ufrag[0] != '\0')) {
 815                 int i, j;
 816
 817                 /* Check for ICE restart and set remote credentials. */
 818                 if ((strcmp(md->addr, "0.0.0.0") == 0) || (strcmp(md->addr, "::0") == 0)) {
 819                         ice_session_restart(call->ice_session);
 820                         ice_restarted = TRUE;
 821                 } else {
 822                         for (i = 0; i < md->nstreams; i++) {
 823                                 const SalStreamDescription *stream = &md->streams[i];
 824                                 IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 825                                 if (cl && (strcmp(stream->rtp_addr, "0.0.0.0") == 0)) {
 826                                         ice_session_restart(call->ice_session);
 827                                         ice_restarted = TRUE;
 828                                         break;
 829                                 }
 830                         }
 831                 }
 832                 if ((ice_session_remote_ufrag(call->ice_session) == NULL) && (ice_session_remote_pwd(call->ice_session) == NULL)) {
 833                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 834                 } else if (ice_session_remote_credentials_changed(call->ice_session, md->ice_ufrag, md->ice_pwd)) {
 835                         if (ice_restarted == FALSE) {
 836                                 ice_session_restart(call->ice_session);
 837                                 ice_restarted = TRUE;
 838                         }
 839                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 840                 }
 841                 for (i = 0; i < md->nstreams; i++) {
 842                         const SalStreamDescription *stream = &md->streams[i];
 843                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 844                         if (cl && (stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0')) {
 845                                 if (ice_check_list_remote_credentials_changed(cl, stream->ice_ufrag, stream->ice_pwd)) {
 846                                         if (ice_restarted == FALSE) {
 847                                                 ice_session_restart(call->ice_session);
 848                                                 ice_restarted = TRUE;
 849                                         }
 850                                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 851                                         break;
 852                                 }
 853                         }
 854                 }
 855
 856                 /* Create ICE check lists if needed and parse ICE attributes. */
 857                 for (i = 0; i < md->nstreams; i++) {
 858                         const SalStreamDescription *stream = &md->streams[i];
 859                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 860                         if (cl == NULL) {
 861                                 cl = ice_check_list_new();
 862                                 ice_session_add_check_list(call->ice_session, cl);
 863                                 switch (stream->type) {
 864                                         case SalAudio:
 865                                                 if (call->audiostream != NULL) call->audiostream->ice_check_list = cl;
 866                                                 break;
 867                                         case SalVideo:
 868                                                 if (call->videostream != NULL) call->videostream->ice_check_list = cl;
 869                                                 break;
 870                                         default:
 871                                                 break;
 872                                 }
 873                         }
 874                         if ((stream->ice_mismatch == TRUE) || (stream->rtp_port == 0)) {
 875                                 ice_check_list_set_state(cl, ICL_Failed);
 876                         } else {
 877                                 if ((stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0'))
 878                                         ice_check_list_set_remote_credentials(cl, stream->ice_ufrag, stream->ice_pwd);
 879                                 for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES; j++) {
 880                                         const SalIceCandidate *candidate = &stream->ice_candidates[j];
 881                                         bool_t default_candidate = FALSE;
 882                                         const char *addr = NULL;
 883                                         int port = 0;
 884                                         if (candidate->addr[0] == '\0') break;
 885                                         if ((candidate->componentID == 0) || (candidate->componentID > 2)) continue;
 886                                         get_default_addr_and_port(candidate->componentID, md, stream, &addr, &port);
 887                                         if (addr && (candidate->port == port) && (strlen(candidate->addr) == strlen(addr)) && (strcmp(candidate->addr, addr) == 0))
 888                                                 default_candidate = TRUE;
 889                                         ice_add_remote_candidate(cl, candidate->type, candidate->addr, candidate->port, candidate->componentID,
 890                                                 candidate->priority, candidate->foundation, default_candidate);
 891                                 }
 892                                 if (ice_restarted == FALSE) {
 893                                         bool_t losing_pairs_added = FALSE;
 894                                         for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_REMOTE_CANDIDATES; j++) {
 895                                                 const SalIceRemoteCandidate *candidate = &stream->ice_remote_candidates[j];
 896                                                 const char *addr = NULL;
 897                                                 int port = 0;
 898                                                 int componentID = j + 1;
 899                                                 if (candidate->addr[0] == '\0') break;
 900                                                 get_default_addr_and_port(componentID, md, stream, &addr, &port);
 901                                                 if (j == 0) {
 902                                                         /* If we receive a re-invite and we finished ICE processing on our side, use the candidates given by the remote. */
 903                                                         ice_check_list_unselect_valid_pairs(cl);
 904                                                 }
 905                                                 ice_add_losing_pair(cl, j + 1, candidate->addr, candidate->port, addr, port);
 906                                                 losing_pairs_added = TRUE;
 907                                         }
 908                                         if (losing_pairs_added == TRUE) ice_check_list_check_completed(cl);
 909                                 }
 910                         }
 911                 }
 912                 for (i = ice_session_nb_check_lists(call->ice_session); i > md->nstreams; i--) {
 913                         ice_session_remove_check_list(call->ice_session, ice_session_check_list(call->ice_session, i - 1));
 914                 }
 915                 ice_session_check_mismatch(call->ice_session);
 916         } else {
 917                 /* Response from remote does not contain mandatory ICE attributes, delete the session. */
 918                 linphone_call_delete_ice_session(call);
 919                 return;
 920         }
 921         if (ice_session_nb_check_lists(call->ice_session) == 0) {
 922                 linphone_call_delete_ice_session(call);
 923         }
 924 }
 925
 926 bool_t linphone_core_media_description_contains_video_stream(const SalMediaDescription *md)
 927 {
 928         int i;
 929
 930         for (i = 0; i < md->nstreams; i++) {
 931                 if ((md->streams[i].type == SalVideo) && (md->streams[i].rtp_port != 0))
 932                         return TRUE;
 933         }
 934         return FALSE;
 935 }
 936
 937 void linphone_core_deactivate_ice_for_deactivated_media_streams(LinphoneCall *call, const SalMediaDescription *md)
 938 {
 939         int i;
 940         for (i = 0; i < md->nstreams; i++) {
 941                 IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 942                 if (cl && (md->streams[i].rtp_port == 0)) {
 943                         if (ice_check_list_state(cl) != ICL_Completed) ice_check_list_set_state(cl, ICL_Failed);
 944                 }
 945         }
 946 }
 947
 948 LinphoneCall * is_a_linphone_call(void *user_pointer){
 949         LinphoneCall *call=(LinphoneCall*)user_pointer;
 950         if (call==NULL) return NULL;
 951         return call->magic==linphone_call_magic ? call : NULL;
 952 }
 953
 954 LinphoneProxyConfig * is_a_linphone_proxy_config(void *user_pointer){
 955         LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)user_pointer;
 956         if (cfg==NULL) return NULL;
 957         return cfg->magic==linphone_proxy_config_magic ? cfg : NULL;
 958 }
 959
 960 unsigned int linphone_core_get_audio_features(LinphoneCore *lc){
 961         unsigned int ret=0;
 962         const char *features=lp_config_get_string(lc->config,"sound","features",NULL);
 963         if (features){
 964                 char tmp[256]={0};
 965                 char name[256];
 966                 char *p,*n;
 967                 strncpy(tmp,features,sizeof(tmp)-1);
 968                 for(p=tmp;*p!='\0';p++){
 969                         if (*p==' ') continue;
 970                         n=strchr(p,'|');
 971                         if (n) *n='\0';
 972                         sscanf(p,"%s",name);
 973                         ms_message("Found audio feature %s",name);
 974                         if (strcasecmp(name,"PLC")==0) ret|=AUDIO_STREAM_FEATURE_PLC;
 975                         else if (strcasecmp(name,"EC")==0) ret|=AUDIO_STREAM_FEATURE_EC;
 976                         else if (strcasecmp(name,"EQUALIZER")==0) ret|=AUDIO_STREAM_FEATURE_EQUALIZER;
 977                         else if (strcasecmp(name,"VOL_SND")==0) ret|=AUDIO_STREAM_FEATURE_VOL_SND;
 978                         else if (strcasecmp(name,"VOL_RCV")==0) ret|=AUDIO_STREAM_FEATURE_VOL_RCV;
 979                         else if (strcasecmp(name,"DTMF")==0) ret|=AUDIO_STREAM_FEATURE_DTMF;
 980                         else if (strcasecmp(name,"DTMF_ECHO")==0) ret|=AUDIO_STREAM_FEATURE_DTMF_ECHO;
 981                         else if (strcasecmp(name,"ALL")==0) ret|=AUDIO_STREAM_FEATURE_ALL;
 982                         else if (strcasecmp(name,"NONE")==0) ret=0;
 983                         else ms_error("Unsupported audio feature %s requested in config file.",name);
 984                         if (!n) break;
 985                         p=n;
 986                 }
 987         }else ret=AUDIO_STREAM_FEATURE_ALL;
 988         return ret;
 989 }
 990
 991
 992 #ifdef HAVE_GETIFADDRS
 993
 994 #include <ifaddrs.h>
 995 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
 996 {
 997         struct ifaddrs *ifp;
 998         struct ifaddrs *ifpstart;
 999         int ret = 0;
1000
1001         if (getifaddrs(&ifpstart) < 0) {
1002                 return -1;
1003         }
1004 #ifndef __linux
1005         #define UP_FLAG IFF_UP /* interface is up */
1006 #else
1007         #define UP_FLAG IFF_RUNNING /* resources allocated */
1008 #endif
1009
1010         for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
1011                 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
1012                         && (ifp->ifa_flags & UP_FLAG) && !(ifp->ifa_flags & IFF_LOOPBACK))
1013                 {
1014                         getnameinfo(ifp->ifa_addr,
1015                                                 (type == AF_INET6) ?
1016                                                 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
1017                                                 address, size, NULL, 0, NI_NUMERICHOST);
1018                         if (strchr(address, '%') == NULL) {     /*avoid ipv6 link-local addresses */
1019                                 /*ms_message("getifaddrs() found %s",address);*/
1020                                 ret++;
1021                                 break;
1022                         }
1023                 }
1024         }
1025         freeifaddrs(ifpstart);
1026         return ret;
1027 }
1028 #endif
1029
1030
1031 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
1032         int err,tmp;
1033         struct addrinfo hints;
1034         struct addrinfo *res=NULL;
1035         struct sockaddr_storage addr;
1036         struct sockaddr *p_addr=(struct sockaddr*)&addr;
1037         ortp_socket_t sock;
1038         socklen_t s;
1039
1040         memset(&hints,0,sizeof(hints));
1041         hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
1042         hints.ai_socktype=SOCK_DGRAM;
1043         /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
1044         err=getaddrinfo(dest,"5060",&hints,&res);
1045         if (err!=0){
1046                 ms_error("getaddrinfo() error: %s",gai_strerror(err));
1047                 return -1;
1048         }
1049         if (res==NULL){
1050                 ms_error("bug: getaddrinfo returned nothing.");
1051                 return -1;
1052         }
1053         sock=socket(res->ai_family,SOCK_DGRAM,0);
1054         tmp=1;
1055         err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
1056         if (err<0){
1057                 ms_warning("Error in setsockopt: %s",strerror(errno));
1058         }
1059         err=connect(sock,res->ai_addr,res->ai_addrlen);
1060         if (err<0) {
1061                 ms_error("Error in connect: %s",strerror(errno));
1062                 freeaddrinfo(res);
1063                 close_socket(sock);
1064                 return -1;
1065         }
1066         freeaddrinfo(res);
1067         res=NULL;
1068         s=sizeof(addr);
1069         err=getsockname(sock,(struct sockaddr*)&addr,&s);
1070         if (err!=0) {
1071                 ms_error("Error in getsockname: %s",strerror(errno));
1072                 close_socket(sock);
1073                 return -1;
1074         }
1075         if (p_addr->sa_family==AF_INET){
1076                 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
1077                 if (p_sin->sin_addr.s_addr==0){
1078                         close_socket(sock);
1079                         return -1;
1080                 }
1081         }
1082         err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
1083         if (err!=0){
1084                 ms_error("getnameinfo error: %s",strerror(errno));
1085         }
1086         close_socket(sock);
1087         ms_message("Local interface to reach %s is %s.",dest,result);
1088         return 0;
1089 }
1090
1091 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
1092         strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
1093 #ifdef HAVE_GETIFADDRS
1094         if (dest==NULL) {
1095                 /*we use getifaddrs for lookup of default interface */
1096                 int found_ifs;
1097
1098                 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
1099                 if (found_ifs==1){
1100                         return 0;
1101                 }else if (found_ifs<=0){
1102                         /*absolutely no network on this machine */
1103                         return -1;
1104                 }
1105         }
1106 #endif
1107         /*else use connect to find the best local ip address */
1108         if (type==AF_INET)
1109                 dest="87.98.157.38"; /*a public IP address*/
1110         else dest="2a00:1450:8002::68";
1111         return get_local_ip_for_with_connect(type,dest,result);
1112 }
1113
1114 #ifndef WIN32
1115 #include <resolv.h>
1116
1117
1118
1119 void _linphone_core_configure_resolver(){
1120 /*bionic declares _res but does not define nor export it !!*/
1121 #ifdef ANDROID
1122         /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
1123         setenv("RES_OPTIONS","timeout:2 attempts:2 retrans:2 retry:2",1);
1124 #else
1125         res_init();
1126         _res.retrans=2; /*retransmit every two seconds*/
1127         _res.retry=2; /*only two times per DNS server*/
1128 #endif
1129 }
1130
1131 #else
1132
1133 void _linphone_core_configure_resolver(){
1134 }
1135
1136 #endif