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 "mediastreamer2/mediastream.h"
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #ifdef HAVE_SIGHANDLER_T
  26 #include <signal.h>
  27 #endif /*HAVE_SIGHANDLER_T*/
  28
  29 #include <string.h>
  30 #if !defined(_WIN32_WCE)
  31 #include <errno.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <unistd.h>
  35 #include <fcntl.h>
  36 #endif /*_WIN32_WCE*/
  37
  38 #undef snprintf
  39 #include <ortp/stun.h>
  40
  41 #ifdef HAVE_GETIFADDRS
  42 #include <net/if.h>
  43 #include <ifaddrs.h>
  44 #endif
  45
  46
  47 #if !defined(WIN32)
  48
  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*/
  52 int set_lock_file()
  53 {
  54         FILE *lockfile;
  55
  56         snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
  57         lockfile=fopen(lock_name,"w");
  58         if (lockfile==NULL)
  59         {
  60                 printf("Failed to create lock file.\n");
  61                 return(-1);
  62         }
  63         fprintf(lockfile,"%i",getpid());
  64         fclose(lockfile);
  65         lock_set=1;
  66         return(0);
  67 }
  68
  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*/
  70 int get_lock_file()
  71 {
  72         int pid;
  73         FILE *lockfile;
  74
  75         snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
  76         lockfile=fopen(lock_name,"r");
  77         if (lockfile==NULL)
  78                 return(-1);
  79         if (fscanf(lockfile,"%i",&pid)!=1){
  80                 ms_warning("Could not read pid in lock file.");
  81                 fclose(lockfile);
  82                 return -1;
  83         }
  84         fclose(lockfile);
  85         return pid;
  86 }
  87
  88 /* remove the lock file if it was set*/
  89 int remove_lock_file()
  90 {
  91         int err=0;
  92         if (lock_set)
  93         {
  94                 err=unlink(lock_name);
  95                 lock_set=0;
  96         }
  97         return(err);
  98 }
  99
 100 #endif
 101
 102 char *int2str(int number)
 103 {
 104         char *numstr=ms_malloc(10);
 105         snprintf(numstr,10,"%i",number);
 106         return numstr;
 107 }
 108
 109 void check_sound_device(LinphoneCore *lc)
 110 {
 111 #ifdef _linux
 112         int fd=0;
 113         int len;
 114         int a;
 115         char *file=NULL;
 116         char *i810_audio=NULL;
 117         char *snd_pcm_oss=NULL;
 118         char *snd_mixer_oss=NULL;
 119         char *snd_pcm=NULL;
 120         fd=open("/proc/modules",O_RDONLY);
 121
 122         if (fd>0){
 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));
 126                 len=statbuf.st_size;
 127                 if (len==0) ms_warning("/proc/modules has zero size!");
 128                 */
 129                 /***** fstat does not work on /proc/modules for unknown reason *****/
 130                 len=6000;
 131                 file=ms_malloc(len+1);
 132                 a=read(fd,file,len);
 133                 if (a<len) file=ms_realloc(file,a+1);
 134                 file[a]='\0';
 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."));*/
 140                         goto end;
 141                 }
 142                 snd_pcm=strstr(file,"snd-pcm");
 143                 if (snd_pcm!=NULL){
 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."));
 148                         }
 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."));
 151                         }
 152                 }
 153         }else {
 154
 155                 ms_warning("Could not open /proc/modules.");
 156         }
 157         /* now check general volume. Some user forget to rise it and then complain that linphone is
 158         not working */
 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);
 162                 if (a<50){
 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);
 165                 }
 166         }
 167         */
 168         end:
 169         if (file!=NULL) ms_free(file);
 170         if (fd>0) close(fd);
 171 #endif
 172 }
 173
 174 #define UDP_HDR_SZ 8
 175 #define RTP_HDR_SZ 12
 176 #define IP4_HDR_SZ 20   /*20 is the minimum, but there may be some options*/
 177
 178 static void payload_type_set_enable(PayloadType *pt,int value)
 179 {
 180         if ((value)!=0) payload_type_set_flag(pt,PAYLOAD_TYPE_ENABLED); \
 181         else payload_type_unset_flag(pt,PAYLOAD_TYPE_ENABLED);
 182 }
 183
 184 static bool_t payload_type_enabled(const PayloadType *pt) {
 185         return (((pt)->flags & PAYLOAD_TYPE_ENABLED)!=0);
 186 }
 187
 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);
 191         }
 192         ms_error("Getting enablement status of codec not in audio or video list of PayloadType !");
 193         return FALSE;
 194 }
 195
 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);
 200                 return 0;
 201         }
 202         ms_error("Enabling codec not in audio or video list of PayloadType !");
 203         return -1;
 204 }
 205
 206 int linphone_core_get_payload_type_number(LinphoneCore *lc, const PayloadType *pt){
 207        return payload_type_get_number(pt);
 208 }
 209
 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);
 213 #ifdef ENABLE_NLS
 214                 return dgettext("mediastreamer",desc->text);
 215 #else
 216                 return desc->text;
 217 #endif
 218         }
 219         return NULL;
 220 }
 221
 222
 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){
 230                         return 15000;
 231                 }
 232         }
 233         return pt->normal_bitrate;
 234 }
 235
 236 static double get_audio_payload_bandwidth(LinphoneCore *lc, const PayloadType *pt){
 237         double npacket=50;
 238         double packet_size;
 239         int bitrate;
 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;
 243 }
 244
 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);
 248 }
 249
 250 void linphone_core_update_allocated_audio_bandwidth(LinphoneCore *lc){
 251         const MSList *elem;
 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){
 259                                 max=pt;
 260                         }
 261                 }
 262         }
 263         if (max) {
 264                 lc->audio_bw=(int)(get_audio_payload_bandwidth(lc,max)/1000.0);
 265         }
 266 }
 267
 268 bool_t linphone_core_is_payload_type_usable_for_bandwidth(LinphoneCore *lc, PayloadType *pt,  int bandwidth_limit)
 269 {
 270         double codec_band;
 271         bool_t ret=FALSE;
 272
 273         switch (pt->type){
 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){
 281                                         ret=FALSE;
 282                                 }
 283                         }
 284                         //ms_message("Payload %s: %g",pt->mime_type,codec_band);
 285                         break;
 286                 case PAYLOAD_VIDEO:
 287                         if (bandwidth_limit!=0) {/* infinite (-1) or strictly positive*/
 288                                 ret=TRUE;
 289                         }
 290                         else ret=FALSE;
 291                         break;
 292         }
 293         return ret;
 294 }
 295
 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)
 298 {
 299         double codec_band;
 300         int allowed_bw,video_bw;
 301         bool_t ret=FALSE;
 302
 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));
 306         if (allowed_bw==0) {
 307                 allowed_bw=-1;
 308                 video_bw=1500; /*around 1.5 Mbit/s*/
 309         }else
 310                 video_bw=get_video_bandwidth(allowed_bw,lc->audio_bw);
 311
 312         switch (pt->type){
 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){
 320                                         ret=FALSE;
 321                                 }
 322                         }
 323                         //ms_message("Payload %s: %g",pt->mime_type,codec_band);
 324                         break;
 325                 case PAYLOAD_VIDEO:
 326                         if (video_bw>0){
 327                                 pt->normal_bitrate=video_bw*1000;
 328                                 ret=TRUE;
 329                         }
 330                         else ret=FALSE;
 331                         break;
 332         }
 333         return ret;
 334 }
 335
 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");
 339         if (f!=NULL){
 340                 int err;
 341                 *result=ms_malloc(4096);
 342                 err=fread(*result,1,4096-1,f);
 343                 if (err<0){
 344                         ms_warning("Error reading command output:%s",strerror(errno));
 345                         ms_free(result);
 346                         return FALSE;
 347                 }
 348                 (*result)[err]=0;
 349                 err=pclose(f);
 350                 if (command_ret!=NULL) *command_ret=err;
 351                 return TRUE;
 352         }
 353 #endif /*_WIN32_WCE*/
 354         return FALSE;
 355 }
 356
 357 static ortp_socket_t create_socket(int local_port){
 358         struct sockaddr_in laddr;
 359         ortp_socket_t sock;
 360         int optval;
 361         sock=socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
 362         if (sock<0) {
 363                 ms_error("Fail to create socket");
 364                 return -1;
 365         }
 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());
 372                 close_socket(sock);
 373                 return -1;
 374         }
 375         optval=1;
 376         if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
 377                                 (SOCKET_OPTION_VALUE)&optval, sizeof (optval))<0){
 378                 ms_warning("Fail to set SO_REUSEADDR");
 379         }
 380         set_non_blocking_socket(sock);
 381         return sock;
 382 }
 383
 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;
 389         StunMessage req;
 390         int err;
 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);
 396         if (len<=0){
 397                 ms_error("Fail to encode stun message.");
 398                 return -1;
 399         }
 400         err=sendto(sock,buf,len,0,server,addrlen);
 401         if (err<0){
 402                 ms_error("sendto failed: %s",strerror(errno));
 403                 return -1;
 404         }
 405         return 0;
 406 }
 407
 408 int parse_hostname_to_addr(const char *server, struct sockaddr_storage *ss, socklen_t *socklen){
 409         struct addrinfo hints,*res=NULL;
 410         int ret;
 411         const char *port;
 412         char host[NI_MAXHOST];
 413         char *p;
 414         host[NI_MAXHOST-1]='\0';
 415         strncpy(host,server,sizeof(host)-1);
 416         p=strchr(host,':');
 417         if (p) {
 418                 *p='\0';
 419                 port=p+1;
 420         }else port="3478";
 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);
 426         if (ret!=0){
 427                 ms_error("getaddrinfo() failed for %s:%s : %s",host,port,gai_strerror(ret));
 428                 return -1;
 429         }
 430         if (!res) return -1;
 431         memcpy(ss,res->ai_addr,res->ai_addrlen);
 432         *socklen=res->ai_addrlen;
 433         freeaddrinfo(res);
 434         return 0;
 435 }
 436
 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;
 440         StunMessage resp;
 441         len=recv(sock,buf,len,0);
 442         if (len>0){
 443                 struct in_addr ia;
 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);
 452                 }else return -1;
 453                 strncpy(ipaddr,inet_ntoa(ia),LINPHONE_IPADDR_SIZE);
 454         }
 455         return len;
 456 }
 457
 458 void linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){
 459         const char *server=linphone_core_get_stun_server(lc);
 460
 461         if (lc->sip_conf.ipv6_enabled){
 462                 ms_warning("stun support is not implemented for ipv6");
 463                 return;
 464         }
 465         if (server!=NULL){
 466                 struct sockaddr_storage ss;
 467                 socklen_t ss_len;
 468                 ortp_socket_t sock1=-1, sock2=-1;
 469                 int loops=0;
 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;
 475
 476                 ac=&call->localdesc->streams[0].candidates[0];
 477                 vc=&call->localdesc->streams[1].candidates[0];
 478
 479                 if (parse_hostname_to_addr(server,&ss,&ss_len)<0){
 480                         ms_error("Fail to parser stun server address: %s",server);
 481                         return;
 482                 }
 483                 if (lc->vtable.display_status!=NULL)
 484                         lc->vtable.display_status(lc,_("Stun lookup in progress..."));
 485
 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;
 489                 if (video_enabled){
 490                         sock2=create_socket(call->video_port);
 491                         if (sock2==-1) return ;
 492                 }
 493                 got_audio=FALSE;
 494                 got_video=FALSE;
 495                 gettimeofday(&init,NULL);
 496                 do{
 497                         double elapsed;
 498                         int id;
 499                         if (loops%20==0){
 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);
 503                                 if (sock2!=-1){
 504                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,22,TRUE);
 505                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,2,FALSE);
 506                                 }
 507                         }
 508 #ifdef WIN32
 509                         Sleep(10);
 510 #else
 511                         usleep(10000);
 512 #endif
 513
 514                         if (recvStunResponse(sock1,ac->addr,
 515                                                 &ac->port,&id)>0){
 516                                 ms_message("STUN test result: local audio port maps to %s:%i",
 517                                                 ac->addr,
 518                                                 ac->port);
 519                                 if (id==11)
 520                                         cone_audio=TRUE;
 521                                 got_audio=TRUE;
 522                         }
 523                         if (recvStunResponse(sock2,vc->addr,
 524                                                         &vc->port,&id)>0){
 525                                 ms_message("STUN test result: local video port maps to %s:%i",
 526                                         vc->addr,
 527                                         vc->port);
 528                                 if (id==22)
 529                                         cone_video=TRUE;
 530                                 got_video=TRUE;
 531                         }
 532                         gettimeofday(&cur,NULL);
 533                         elapsed=((cur.tv_sec-init.tv_sec)*1000.0) +  ((cur.tv_usec-init.tv_usec)/1000.0);
 534                         if (elapsed>2000)  {
 535                                 ms_message("Stun responses timeout, going ahead.");
 536                                 break;
 537                         }
 538                         loops++;
 539                 }while(!(got_audio && (got_video||sock2==-1)  ) );
 540                 if (!got_audio){
 541                         ms_error("No stun server response for audio port.");
 542                 }else{
 543                         if (!cone_audio) {
 544                                 ms_message("NAT is symmetric for audio port");
 545                         }
 546                 }
 547                 if (sock2!=-1){
 548                         if (!got_video){
 549                                 ms_error("No stun server response for video port.");
 550                         }else{
 551                                 if (!cone_video) {
 552                                         ms_message("NAT is symmetric for video port.");
 553                                 }
 554                         }
 555                 }
 556                 if ((ac->addr[0]!='\0' && vc->addr[0]!='\0' && strcmp(ac->addr,vc->addr)==0)
 557                     || sock2==-1){
 558                         strcpy(call->localdesc->addr,ac->addr);
 559                 }
 560                 close_socket(sock1);
 561                 if (sock2!=-1) close_socket(sock2);
 562         }
 563 }
 564
 565 void linphone_core_gather_ice_candidates(LinphoneCore *lc, LinphoneCall *call)
 566 {
 567         typedef struct _st_gathering {
 568                 ortp_socket_t sock;
 569                 bool_t response;
 570                 IceCandidate *base;
 571                 struct timeval transmission_time;
 572         } gathering_t;
 573
 574         char local_addr[64];
 575         char addr[64];
 576         int port;
 577         int id;
 578         gathering_t audio_gatherings[2];
 579         gathering_t video_gatherings[2];
 580         IceCheckList *audio_check_list;
 581         IceCheckList *video_check_list;
 582         IceSession *ice_session = sal_op_get_ice_session(call->op);
 583         struct sockaddr_storage ss;
 584         socklen_t ss_len;
 585         struct timeval init, cur, diff;
 586         double elapsed;
 587         int loops = 0;
 588         const char *server = linphone_core_get_stun_server(lc);
 589
 590         if ((server == NULL) || (ice_session == NULL)) return;
 591         audio_check_list = ice_session_check_list(ice_session, 0);
 592         video_check_list = ice_session_check_list(ice_session, 1);
 593         if (audio_check_list == NULL) return;
 594
 595         if (lc->sip_conf.ipv6_enabled){
 596                 ms_warning("stun support is not implemented for ipv6");
 597                 return;
 598         }
 599
 600         if (parse_hostname_to_addr(server, &ss, &ss_len) < 0) {
 601                 ms_error("Fail to parser stun server address: %s", server);
 602                 return;
 603         }
 604         if (lc->vtable.display_status != NULL)
 605                 lc->vtable.display_status(lc, _("ICE local candidates gathering in progress..."));
 606
 607         audio_gatherings[0].response = audio_gatherings[1].response = FALSE;
 608         video_gatherings[0].response = video_gatherings[1].response = FALSE;
 609         audio_gatherings[0].base = audio_gatherings[1].base = NULL;
 610         video_gatherings[0].base = video_gatherings[1].base = NULL;
 611         audio_gatherings[0].sock = create_socket(call->audio_port);
 612         if (audio_gatherings[0].sock == -1) return;
 613         audio_gatherings[1].sock = create_socket(call->audio_port + 1);
 614         if (audio_gatherings[1].sock == -1) return;
 615         if (call->params.has_video) {
 616                 video_gatherings[0].sock = create_socket(call->video_port);
 617                 if (video_gatherings[0].sock == -1) return;
 618                 video_gatherings[1].sock = create_socket(call->video_port + 1);
 619                 if (video_gatherings[1].sock == -1) return;
 620         } else {
 621                 video_gatherings[0].sock = video_gatherings[1].sock = -1;
 622         }
 623         if (linphone_core_get_local_ip_for(AF_INET, NULL, local_addr) < 0) {
 624                 ms_error("Fail to get local ip");
 625                 return;
 626         }
 627         audio_gatherings[0].base = ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port, 1, NULL);
 628         audio_gatherings[1].base = ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port + 1, 2, NULL);
 629         if (call->params.has_video && (video_check_list != NULL)) {
 630                 video_gatherings[0].base = ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port, 1, NULL);
 631                 video_gatherings[1].base = ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port + 1, 2, NULL);
 632         }
 633
 634         gettimeofday(&init, NULL);
 635         audio_gatherings[0].transmission_time = cur = init;
 636         diff.tv_sec = 0, diff.tv_usec = 20000;
 637         timeradd(&audio_gatherings[0].transmission_time, &diff, &audio_gatherings[1].transmission_time);
 638         timeradd(&audio_gatherings[1].transmission_time, &diff, &video_gatherings[0].transmission_time);
 639         timeradd(&video_gatherings[0].transmission_time, &diff, &video_gatherings[1].transmission_time);
 640         diff.tv_sec = 0, diff.tv_usec = 100000;
 641         do {
 642                 if ((audio_gatherings[0].response == FALSE) && timercmp(&cur, &audio_gatherings[0].transmission_time, >=)) {
 643                         timeradd(&audio_gatherings[0].transmission_time, &diff, &audio_gatherings[0].transmission_time);
 644                         sendStunRequest(audio_gatherings[0].sock, (struct sockaddr*)&ss, ss_len, 1, FALSE);
 645                 }
 646                 if ((audio_gatherings[1].response == FALSE) && timercmp(&cur, &audio_gatherings[1].transmission_time, >=)) {
 647                         timeradd(&audio_gatherings[1].transmission_time, &diff, &audio_gatherings[1].transmission_time);
 648                         sendStunRequest(audio_gatherings[1].sock, (struct sockaddr*)&ss, ss_len, 1, FALSE);
 649                 }
 650                 if (call->params.has_video) {
 651                         if ((video_gatherings[0].response == FALSE) && timercmp(&cur, &video_gatherings[0].transmission_time, >=)) {
 652                                 timeradd(&video_gatherings[0].transmission_time, &diff, &video_gatherings[0].transmission_time);
 653                                 sendStunRequest(video_gatherings[0].sock, (struct sockaddr*)&ss, ss_len, 2, FALSE);
 654                         }
 655                         if ((video_gatherings[1].response == FALSE) && timercmp(&cur, &video_gatherings[1].transmission_time, >=)) {
 656                                 timeradd(&video_gatherings[1].transmission_time, &diff, &video_gatherings[1].transmission_time);
 657                                 sendStunRequest(video_gatherings[1].sock, (struct sockaddr*)&ss, ss_len, 2, FALSE);
 658                         }
 659                 }
 660 #ifdef WIN32
 661                 Sleep(10);
 662 #else
 663                 usleep(10000);
 664 #endif
 665
 666                 if (recvStunResponse(audio_gatherings[0].sock, addr, &port, &id) > 0) {
 667                         ice_add_local_candidate(audio_check_list, "srflx", addr, port, 1, audio_gatherings[0].base);
 668                         audio_gatherings[0].response = TRUE;
 669                 }
 670                 if (recvStunResponse(audio_gatherings[1].sock, addr, &port, &id) > 0) {
 671                         ice_add_local_candidate(audio_check_list, "srflx", addr, port, 2, audio_gatherings[1].base);
 672                         audio_gatherings[1].response = TRUE;
 673                 }
 674                 if (call->params.has_video && (video_check_list != NULL)) {
 675                         if (recvStunResponse(video_gatherings[0].sock, addr, &port, &id) > 0) {
 676                                 ice_add_local_candidate(video_check_list, "srflx", addr, port, 1, video_gatherings[0].base);
 677                                 video_gatherings[0].response = TRUE;
 678                         }
 679                         if (recvStunResponse(video_gatherings[1].sock, addr, &port, &id) > 0) {
 680                                 ice_add_local_candidate(video_check_list, "srflx", addr, port, 2, video_gatherings[1].base);
 681                                 video_gatherings[1].response = TRUE;
 682                         }
 683                 }
 684
 685                 gettimeofday(&cur, NULL);
 686                 elapsed = ((cur.tv_sec - init.tv_sec) * 1000.0) +  ((cur.tv_usec - init.tv_usec) / 1000.0);
 687                 if (elapsed > 2000)  {
 688                         ms_message("Stun responses timeout, going ahead.");
 689                         break;
 690                 }
 691                 loops++;
 692         } while (!((audio_gatherings[0].response == TRUE) && (audio_gatherings[1].response == TRUE)
 693                 && (!call->params.has_video || ((video_gatherings[0].response == TRUE) && (video_gatherings[1].response == TRUE)))));
 694
 695         if ((audio_gatherings[0].response == FALSE) || (audio_gatherings[1].response == FALSE)
 696                 || (call->params.has_video && ((video_gatherings[0].response == FALSE) || (video_gatherings[1].response == FALSE)))) {
 697                 /* Failed some STUN checks, deactivate ICE. */
 698                 ice_session_destroy(ice_session);
 699                 ice_session = NULL;
 700                 sal_op_set_ice_session(call->op, ice_session);
 701         } else {
 702                 ice_session_compute_candidates_foundations(ice_session);
 703                 ice_session_eliminate_redundant_candidates(ice_session);
 704                 ice_session_choose_default_candidates(ice_session);
 705         }
 706
 707         close_socket(audio_gatherings[0].sock);
 708         close_socket(audio_gatherings[1].sock);
 709         if (ice_session != NULL) ice_dump_candidates(audio_check_list);
 710         if (call->params.has_video && (video_check_list != NULL)) {
 711                 if (video_gatherings[0].sock != -1) close_socket(video_gatherings[0].sock);
 712                 if (video_gatherings[1].sock != -1) close_socket(video_gatherings[1].sock);
 713                 if (ice_session != NULL) ice_dump_candidates(video_check_list);
 714         }
 715 }
 716
 717 LinphoneCall * is_a_linphone_call(void *user_pointer){
 718         LinphoneCall *call=(LinphoneCall*)user_pointer;
 719         if (call==NULL) return NULL;
 720         return call->magic==linphone_call_magic ? call : NULL;
 721 }
 722
 723 LinphoneProxyConfig * is_a_linphone_proxy_config(void *user_pointer){
 724         LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)user_pointer;
 725         if (cfg==NULL) return NULL;
 726         return cfg->magic==linphone_proxy_config_magic ? cfg : NULL;
 727 }
 728
 729
 730 #ifdef HAVE_GETIFADDRS
 731
 732 #include <ifaddrs.h>
 733 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
 734 {
 735         struct ifaddrs *ifp;
 736         struct ifaddrs *ifpstart;
 737         int ret = 0;
 738
 739         if (getifaddrs(&ifpstart) < 0) {
 740                 return -1;
 741         }
 742
 743         for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
 744                 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
 745                         && (ifp->ifa_flags & IFF_RUNNING) && !(ifp->ifa_flags & IFF_LOOPBACK))
 746                 {
 747                         getnameinfo(ifp->ifa_addr,
 748                                                 (type == AF_INET6) ?
 749                                                 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
 750                                                 address, size, NULL, 0, NI_NUMERICHOST);
 751                         if (strchr(address, '%') == NULL) {     /*avoid ipv6 link-local addresses */
 752                                 /*ms_message("getifaddrs() found %s",address);*/
 753                                 ret++;
 754                                 break;
 755                         }
 756                 }
 757         }
 758         freeifaddrs(ifpstart);
 759         return ret;
 760 }
 761 #endif
 762
 763
 764 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
 765         int err,tmp;
 766         struct addrinfo hints;
 767         struct addrinfo *res=NULL;
 768         struct sockaddr_storage addr;
 769         struct sockaddr *p_addr=(struct sockaddr*)&addr;
 770         ortp_socket_t sock;
 771         socklen_t s;
 772
 773         memset(&hints,0,sizeof(hints));
 774         hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
 775         hints.ai_socktype=SOCK_DGRAM;
 776         /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
 777         err=getaddrinfo(dest,"5060",&hints,&res);
 778         if (err!=0){
 779                 ms_error("getaddrinfo() error: %s",gai_strerror(err));
 780                 return -1;
 781         }
 782         if (res==NULL){
 783                 ms_error("bug: getaddrinfo returned nothing.");
 784                 return -1;
 785         }
 786         sock=socket(res->ai_family,SOCK_DGRAM,0);
 787         tmp=1;
 788         err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
 789         if (err<0){
 790                 ms_warning("Error in setsockopt: %s",strerror(errno));
 791         }
 792         err=connect(sock,res->ai_addr,res->ai_addrlen);
 793         if (err<0) {
 794                 ms_error("Error in connect: %s",strerror(errno));
 795                 freeaddrinfo(res);
 796                 close_socket(sock);
 797                 return -1;
 798         }
 799         freeaddrinfo(res);
 800         res=NULL;
 801         s=sizeof(addr);
 802         err=getsockname(sock,(struct sockaddr*)&addr,&s);
 803         if (err!=0) {
 804                 ms_error("Error in getsockname: %s",strerror(errno));
 805                 close_socket(sock);
 806                 return -1;
 807         }
 808         if (p_addr->sa_family==AF_INET){
 809                 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
 810                 if (p_sin->sin_addr.s_addr==0){
 811                         close_socket(sock);
 812                         return -1;
 813                 }
 814         }
 815         err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
 816         if (err!=0){
 817                 ms_error("getnameinfo error: %s",strerror(errno));
 818         }
 819         close_socket(sock);
 820         ms_message("Local interface to reach %s is %s.",dest,result);
 821         return 0;
 822 }
 823
 824 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
 825         strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
 826 #ifdef HAVE_GETIFADDRS
 827         if (dest==NULL) {
 828                 /*we use getifaddrs for lookup of default interface */
 829                 int found_ifs;
 830
 831                 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
 832                 if (found_ifs==1){
 833                         return 0;
 834                 }else if (found_ifs<=0){
 835                         /*absolutely no network on this machine */
 836                         return -1;
 837                 }
 838         }
 839 #endif
 840         /*else use connect to find the best local ip address */
 841         if (type==AF_INET)
 842                 dest="87.98.157.38"; /*a public IP address*/
 843         else dest="2a00:1450:8002::68";
 844         return get_local_ip_for_with_connect(type,dest,result);
 845 }
 846
 847 #ifndef WIN32
 848 #include <resolv.h>
 849
 850
 851
 852
 853 void _linphone_core_configure_resolver(){
 854 /*bionic declares _res but does not define nor export it !!*/
 855 #ifdef ANDROID
 856         /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
 857         setenv("RES_OPTIONS","timeout:2 attempts:2 retrans:2 retry:2",1);
 858 #else
 859         res_init();
 860         _res.retrans=2; /*retransmit every two seconds*/
 861         _res.retry=2; /*only two times per DNS server*/
 862 #endif
 863 }
 864
 865 #else
 866
 867 void _linphone_core_configure_resolver(){
 868 }
 869
 870 #endif