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 ret;
 412         const char *port;
 413         char host[NI_MAXHOST];
 414         char *p;
 415         host[NI_MAXHOST-1]='\0';
 416         strncpy(host,server,sizeof(host)-1);
 417         p=strchr(host,':');
 418         if (p) {
 419                 *p='\0';
 420                 port=p+1;
 421         }else port="3478";
 422         memset(&hints,0,sizeof(hints));
 423         hints.ai_family=PF_INET;
 424         hints.ai_socktype=SOCK_DGRAM;
 425         hints.ai_protocol=IPPROTO_UDP;
 426         ret=getaddrinfo(host,port,&hints,&res);
 427         if (ret!=0){
 428                 ms_error("getaddrinfo() failed for %s:%s : %s",host,port,gai_strerror(ret));
 429                 return -1;
 430         }
 431         if (!res) return -1;
 432         memcpy(ss,res->ai_addr,res->ai_addrlen);
 433         *socklen=res->ai_addrlen;
 434         freeaddrinfo(res);
 435         return 0;
 436 }
 437
 438 static int recvStunResponse(ortp_socket_t sock, char *ipaddr, int *port, int *id){
 439         char buf[STUN_MAX_MESSAGE_SIZE];
 440         int len = STUN_MAX_MESSAGE_SIZE;
 441         StunMessage resp;
 442         len=recv(sock,buf,len,0);
 443         if (len>0){
 444                 struct in_addr ia;
 445                 stunParseMessage(buf,len, &resp );
 446                 *id=resp.msgHdr.tr_id.octet[0];
 447                 if (resp.hasXorMappedAddress){
 448                         *port = resp.xorMappedAddress.ipv4.port;
 449                         ia.s_addr=htonl(resp.xorMappedAddress.ipv4.addr);
 450                 }else if (resp.hasMappedAddress){
 451                         *port = resp.mappedAddress.ipv4.port;
 452                         ia.s_addr=htonl(resp.mappedAddress.ipv4.addr);
 453                 }else return -1;
 454                 strncpy(ipaddr,inet_ntoa(ia),LINPHONE_IPADDR_SIZE);
 455         }
 456         return len;
 457 }
 458
 459 void linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){
 460         const char *server=linphone_core_get_stun_server(lc);
 461
 462         if (lc->sip_conf.ipv6_enabled){
 463                 ms_warning("stun support is not implemented for ipv6");
 464                 return;
 465         }
 466         if (server!=NULL){
 467                 struct sockaddr_storage ss;
 468                 socklen_t ss_len;
 469                 ortp_socket_t sock1=-1, sock2=-1;
 470                 int loops=0;
 471                 bool_t video_enabled=linphone_core_video_enabled(lc);
 472                 bool_t got_audio,got_video;
 473                 bool_t cone_audio=FALSE,cone_video=FALSE;
 474                 struct timeval init,cur;
 475                 SalEndpointCandidate *ac,*vc;
 476
 477                 ac=&call->localdesc->streams[0].candidates[0];
 478                 vc=&call->localdesc->streams[1].candidates[0];
 479
 480                 if (parse_hostname_to_addr(server,&ss,&ss_len)<0){
 481                         ms_error("Fail to parser stun server address: %s",server);
 482                         return;
 483                 }
 484                 if (lc->vtable.display_status!=NULL)
 485                         lc->vtable.display_status(lc,_("Stun lookup in progress..."));
 486
 487                 /*create the two audio and video RTP sockets, and send STUN message to our stun server */
 488                 sock1=create_socket(call->audio_port);
 489                 if (sock1==-1) return;
 490                 if (video_enabled){
 491                         sock2=create_socket(call->video_port);
 492                         if (sock2==-1) return ;
 493                 }
 494                 got_audio=FALSE;
 495                 got_video=FALSE;
 496                 gettimeofday(&init,NULL);
 497                 do{
 498                         double elapsed;
 499                         int id;
 500                         if (loops%20==0){
 501                                 ms_message("Sending stun requests...");
 502                                 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,11,TRUE);
 503                                 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,1,FALSE);
 504                                 if (sock2!=-1){
 505                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,22,TRUE);
 506                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,2,FALSE);
 507                                 }
 508                         }
 509 #ifdef WIN32
 510                         Sleep(10);
 511 #else
 512                         usleep(10000);
 513 #endif
 514
 515                         if (recvStunResponse(sock1,ac->addr,
 516                                                 &ac->port,&id)>0){
 517                                 ms_message("STUN test result: local audio port maps to %s:%i",
 518                                                 ac->addr,
 519                                                 ac->port);
 520                                 if (id==11)
 521                                         cone_audio=TRUE;
 522                                 got_audio=TRUE;
 523                         }
 524                         if (recvStunResponse(sock2,vc->addr,
 525                                                         &vc->port,&id)>0){
 526                                 ms_message("STUN test result: local video port maps to %s:%i",
 527                                         vc->addr,
 528                                         vc->port);
 529                                 if (id==22)
 530                                         cone_video=TRUE;
 531                                 got_video=TRUE;
 532                         }
 533                         gettimeofday(&cur,NULL);
 534                         elapsed=((cur.tv_sec-init.tv_sec)*1000.0) +  ((cur.tv_usec-init.tv_usec)/1000.0);
 535                         if (elapsed>2000)  {
 536                                 ms_message("Stun responses timeout, going ahead.");
 537                                 break;
 538                         }
 539                         loops++;
 540                 }while(!(got_audio && (got_video||sock2==-1)  ) );
 541                 if (!got_audio){
 542                         ms_error("No stun server response for audio port.");
 543                 }else{
 544                         if (!cone_audio) {
 545                                 ms_message("NAT is symmetric for audio port");
 546                         }
 547                 }
 548                 if (sock2!=-1){
 549                         if (!got_video){
 550                                 ms_error("No stun server response for video port.");
 551                         }else{
 552                                 if (!cone_video) {
 553                                         ms_message("NAT is symmetric for video port.");
 554                                 }
 555                         }
 556                 }
 557                 if ((ac->addr[0]!='\0' && vc->addr[0]!='\0' && strcmp(ac->addr,vc->addr)==0)
 558                     || sock2==-1){
 559                         strcpy(call->localdesc->addr,ac->addr);
 560                 }
 561                 close_socket(sock1);
 562                 if (sock2!=-1) close_socket(sock2);
 563         }
 564 }
 565
 566 int linphone_core_gather_ice_candidates(LinphoneCore *lc, LinphoneCall *call)
 567 {
 568         char local_addr[64];
 569         struct sockaddr_storage ss;
 570         socklen_t ss_len;
 571         IceCheckList *audio_check_list;
 572         IceCheckList *video_check_list;
 573         const char *server = linphone_core_get_stun_server(lc);
 574
 575         if ((server == NULL) || (call->ice_session == NULL)) return -1;
 576         audio_check_list = ice_session_check_list(call->ice_session, 0);
 577         video_check_list = ice_session_check_list(call->ice_session, 1);
 578         if (audio_check_list == NULL) return -1;
 579
 580         if (lc->sip_conf.ipv6_enabled){
 581                 ms_warning("stun support is not implemented for ipv6");
 582                 return -1;
 583         }
 584
 585         if (parse_hostname_to_addr(server, &ss, &ss_len) < 0) {
 586                 ms_error("Fail to parser stun server address: %s", server);
 587                 return -1;
 588         }
 589         if (lc->vtable.display_status != NULL)
 590                 lc->vtable.display_status(lc, _("ICE local candidates gathering in progress..."));
 591
 592         /* Gather local host candidates. */
 593         if (linphone_core_get_local_ip_for(AF_INET, NULL, local_addr) < 0) {
 594                 ms_error("Fail to get local ip");
 595                 return -1;
 596         }
 597         ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port, 1, NULL);
 598         ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port + 1, 2, NULL);
 599         if (call->params.has_video && (video_check_list != NULL)) {
 600                 ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port, 1, NULL);
 601                 ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port + 1, 2, NULL);
 602         }
 603
 604         /* Gather local srflx candidates. */
 605         ice_session_gather_candidates(call->ice_session, ss, ss_len);
 606         return 0;
 607 }
 608
 609 void linphone_core_update_local_media_description_from_ice(SalMediaDescription *desc, IceSession *session)
 610 {
 611         const char *rtp_addr, *rtcp_addr;
 612         IceSessionState session_state = ice_session_state(session);
 613         int nb_candidates;
 614         int i, j;
 615
 616         if (session_state == IS_Completed) {
 617                 desc->ice_completed = TRUE;
 618                 ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, 0), &rtp_addr, NULL, NULL, NULL);
 619                 strncpy(desc->addr, rtp_addr, sizeof(desc->addr));
 620         }
 621         else {
 622                 desc->ice_completed = FALSE;
 623         }
 624         strncpy(desc->ice_pwd, ice_session_local_pwd(session), sizeof(desc->ice_pwd));
 625         strncpy(desc->ice_ufrag, ice_session_local_ufrag(session), sizeof(desc->ice_ufrag));
 626         for (i = 0; i < desc->nstreams; i++) {
 627                 SalStreamDescription *stream = &desc->streams[i];
 628                 IceCheckList *cl = ice_session_check_list(session, i);
 629                 nb_candidates = 0;
 630                 if (cl == NULL) continue;
 631                 if (cl->state == ICL_Completed) {
 632                         stream->ice_completed = TRUE;
 633                         ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, i), &rtp_addr, &stream->rtp_port, &rtcp_addr, &stream->rtcp_port);
 634                         strncpy(stream->rtp_addr, rtp_addr, sizeof(stream->rtp_addr));
 635                         strncpy(stream->rtcp_addr, rtcp_addr, sizeof(stream->rtcp_addr));
 636                 } else {
 637                         stream->ice_completed = FALSE;
 638                 }
 639                 if ((strlen(ice_check_list_local_pwd(cl)) != strlen(desc->ice_pwd)) || (strcmp(ice_check_list_local_pwd(cl), desc->ice_pwd)))
 640                         strncpy(stream->ice_pwd, ice_check_list_local_pwd(cl), sizeof(stream->ice_pwd));
 641                 else
 642                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 643                 if ((strlen(ice_check_list_local_ufrag(cl)) != strlen(desc->ice_ufrag)) || (strcmp(ice_check_list_local_ufrag(cl), desc->ice_ufrag)))
 644                         strncpy(stream->ice_ufrag, ice_check_list_local_ufrag(cl), sizeof(stream->ice_ufrag));
 645                 else
 646                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 647                 stream->ice_mismatch = ice_check_list_is_mismatch(cl);
 648                 if ((cl->state == ICL_Running) || (cl->state == ICL_Completed)) {
 649                         memset(stream->ice_candidates, 0, sizeof(stream->ice_candidates));
 650                         for (j = 0; j < ms_list_size(cl->local_candidates); j++) {
 651                                 SalIceCandidate *sal_candidate = &stream->ice_candidates[nb_candidates];
 652                                 IceCandidate *ice_candidate = ms_list_nth_data(cl->local_candidates, j);
 653                                 const char *default_addr = NULL;
 654                                 int default_port = 0;
 655                                 if (ice_candidate->componentID == 1) {
 656                                         default_addr = stream->rtp_addr;
 657                                         default_port = stream->rtp_port;
 658                                 } else if (ice_candidate->componentID == 2) {
 659                                         default_addr = stream->rtcp_addr;
 660                                         default_port = stream->rtcp_port;
 661                                 } else continue;
 662                                 if (default_addr[0] == '\0') default_addr = desc->addr;
 663                                 /* 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. */
 664                                 if ((cl->state == ICL_Completed)
 665                                         && !((ice_candidate->taddr.port == default_port) && (strlen(ice_candidate->taddr.ip) == strlen(default_addr)) && (strcmp(ice_candidate->taddr.ip, default_addr) == 0)))
 666                                         continue;
 667                                 strncpy(sal_candidate->foundation, ice_candidate->foundation, sizeof(sal_candidate->foundation));
 668                                 sal_candidate->componentID = ice_candidate->componentID;
 669                                 sal_candidate->priority = ice_candidate->priority;
 670                                 strncpy(sal_candidate->type, ice_candidate_type(ice_candidate), sizeof(sal_candidate->type));
 671                                 strncpy(sal_candidate->addr, ice_candidate->taddr.ip, sizeof(sal_candidate->addr));
 672                                 sal_candidate->port = ice_candidate->taddr.port;
 673                                 if ((ice_candidate->base != NULL) && (ice_candidate->base != ice_candidate)) {
 674                                         strncpy(sal_candidate->raddr, ice_candidate->base->taddr.ip, sizeof(sal_candidate->raddr));
 675                                         sal_candidate->rport = ice_candidate->base->taddr.port;
 676                                 }
 677                                 nb_candidates++;
 678                         }
 679                 }
 680                 if ((cl->state == ICL_Completed) && (ice_session_role(session) == IR_Controlling)) {
 681                         int rtp_port, rtcp_port;
 682                         memset(stream->ice_remote_candidates, 0, sizeof(stream->ice_remote_candidates));
 683                         ice_check_list_selected_valid_remote_candidate(cl, &rtp_addr, &rtp_port, &rtcp_addr, &rtcp_port);
 684                         strncpy(stream->ice_remote_candidates[0].addr, rtp_addr, sizeof(stream->ice_remote_candidates[0].addr));
 685                         stream->ice_remote_candidates[0].port = rtp_port;
 686                         strncpy(stream->ice_remote_candidates[1].addr, rtcp_addr, sizeof(stream->ice_remote_candidates[1].addr));
 687                         stream->ice_remote_candidates[1].port = rtcp_port;
 688                 }
 689         }
 690 }
 691
 692 static void get_default_addr_and_port(uint16_t componentID, const SalMediaDescription *md, const SalStreamDescription *stream, const char **addr, int *port)
 693 {
 694         if (componentID == 1) {
 695                 *addr = stream->rtp_addr;
 696                 *port = stream->rtp_port;
 697         } else if (componentID == 2) {
 698                 *addr = stream->rtcp_addr;
 699                 *port = stream->rtcp_port;
 700         } else return;
 701         if ((*addr)[0] == '\0') *addr = md->addr;
 702 }
 703
 704 void linphone_core_update_ice_from_remote_media_description(LinphoneCall *call, const SalMediaDescription *md)
 705 {
 706         bool_t ice_restarted = FALSE;
 707
 708         if ((md->ice_pwd[0] != '\0') && (md->ice_ufrag[0] != '\0')) {
 709                 int i, j;
 710
 711                 /* Check for ICE restart and set remote credentials. */
 712                 if ((strcmp(md->addr, "0.0.0.0") == 0) || (strcmp(md->addr, "::0") == 0)) {
 713                         ice_session_restart(call->ice_session);
 714                         ice_restarted = TRUE;
 715                 } else {
 716                         for (i = 0; i < md->nstreams; i++) {
 717                                 const SalStreamDescription *stream = &md->streams[i];
 718                                 IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 719                                 if (cl && (strcmp(stream->rtp_addr, "0.0.0.0") == 0)) {
 720                                         ice_session_restart(call->ice_session);
 721                                         ice_restarted = TRUE;
 722                                         break;
 723                                 }
 724                         }
 725                 }
 726                 if ((ice_session_remote_ufrag(call->ice_session) == NULL) && (ice_session_remote_pwd(call->ice_session) == NULL)) {
 727                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 728                 } else if (ice_session_remote_credentials_changed(call->ice_session, md->ice_ufrag, md->ice_pwd)) {
 729                         if (ice_restarted == FALSE) {
 730                                 ice_session_restart(call->ice_session);
 731                                 ice_restarted = TRUE;
 732                         }
 733                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 734                 }
 735                 for (i = 0; i < md->nstreams; i++) {
 736                         const SalStreamDescription *stream = &md->streams[i];
 737                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 738                         if (cl && (stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0')) {
 739                                 if (ice_check_list_remote_credentials_changed(cl, stream->ice_ufrag, stream->ice_pwd)) {
 740                                         if (ice_restarted == FALSE) {
 741                                                 ice_session_restart(call->ice_session);
 742                                                 ice_restarted = TRUE;
 743                                         }
 744                                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 745                                         break;
 746                                 }
 747                         }
 748                 }
 749
 750                 /* Create ICE check lists if needed and parse ICE attributes. */
 751                 for (i = 0; i < md->nstreams; i++) {
 752                         const SalStreamDescription *stream = &md->streams[i];
 753                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 754                         if (cl == NULL) {
 755                                 cl = ice_check_list_new();
 756                                 ice_session_add_check_list(call->ice_session, cl);
 757                                 switch (stream->type) {
 758                                         case SalAudio:
 759                                                 if (call->audiostream != NULL) call->audiostream->ice_check_list = cl;
 760                                                 break;
 761                                         case SalVideo:
 762                                                 if (call->videostream != NULL) call->videostream->ice_check_list = cl;
 763                                                 break;
 764                                         default:
 765                                                 break;
 766                                 }
 767                         }
 768                         if (stream->ice_mismatch == TRUE) {
 769                                 ice_check_list_set_state(cl, ICL_Failed);
 770                         } else {
 771                                 if ((stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0'))
 772                                         ice_check_list_set_remote_credentials(cl, stream->ice_ufrag, stream->ice_pwd);
 773                                 for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES; j++) {
 774                                         const SalIceCandidate *candidate = &stream->ice_candidates[j];
 775                                         bool_t default_candidate = FALSE;
 776                                         const char *addr = NULL;
 777                                         int port = 0;
 778                                         if (candidate->addr[0] == '\0') break;
 779                                         if ((candidate->componentID == 0) || (candidate->componentID > 2)) continue;
 780                                         get_default_addr_and_port(candidate->componentID, md, stream, &addr, &port);
 781                                         if (addr && (candidate->port == port) && (strlen(candidate->addr) == strlen(addr)) && (strcmp(candidate->addr, addr) == 0))
 782                                                 default_candidate = TRUE;
 783                                         ice_add_remote_candidate(cl, candidate->type, candidate->addr, candidate->port, candidate->componentID,
 784                                                 candidate->priority, candidate->foundation, default_candidate);
 785                                 }
 786                                 if (ice_restarted == FALSE) {
 787                                         for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_REMOTE_CANDIDATES; j++) {
 788                                                 const SalIceRemoteCandidate *candidate = &stream->ice_remote_candidates[j];
 789                                                 const char *addr = NULL;
 790                                                 int port = 0;
 791                                                 int componentID = j + 1;
 792                                                 if (candidate->addr[0] == '\0') break;
 793                                                 get_default_addr_and_port(componentID, md, stream, &addr, &port);
 794                                                 ice_add_losing_pair(ice_session_check_list(call->ice_session, i), j + 1, candidate->addr, candidate->port, addr, port);
 795                                         }
 796                                 }
 797                         }
 798                 }
 799                 for (i = ice_session_nb_check_lists(call->ice_session); i > md->nstreams; i--) {
 800                         ice_session_remove_check_list(call->ice_session, ice_session_check_list(call->ice_session, i - 1));
 801                 }
 802                 ice_session_check_mismatch(call->ice_session);
 803         }
 804         if ((ice_session_state(call->ice_session) == IS_Failed) || (ice_session_nb_check_lists(call->ice_session) == 0)) {
 805                 linphone_call_delete_ice_session(call);
 806         }
 807 }
 808
 809 LinphoneCall * is_a_linphone_call(void *user_pointer){
 810         LinphoneCall *call=(LinphoneCall*)user_pointer;
 811         if (call==NULL) return NULL;
 812         return call->magic==linphone_call_magic ? call : NULL;
 813 }
 814
 815 LinphoneProxyConfig * is_a_linphone_proxy_config(void *user_pointer){
 816         LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)user_pointer;
 817         if (cfg==NULL) return NULL;
 818         return cfg->magic==linphone_proxy_config_magic ? cfg : NULL;
 819 }
 820
 821 unsigned int linphone_core_get_audio_features(LinphoneCore *lc){
 822         unsigned int ret=0;
 823         const char *features=lp_config_get_string(lc->config,"sound","features",NULL);
 824         if (features){
 825                 char tmp[256]={0};
 826                 char name[256];
 827                 char *p,*n;
 828                 strncpy(tmp,features,sizeof(tmp)-1);
 829                 for(p=tmp;*p!='\0';p++){
 830                         if (*p==' ') continue;
 831                         n=strchr(p,'|');
 832                         if (n) *n='\0';
 833                         sscanf(p,"%s",name);
 834                         ms_message("Found audio feature %s",name);
 835                         if (strcasecmp(name,"PLC")==0) ret|=AUDIO_STREAM_FEATURE_PLC;
 836                         else if (strcasecmp(name,"EC")==0) ret|=AUDIO_STREAM_FEATURE_EC;
 837                         else if (strcasecmp(name,"EQUALIZER")==0) ret|=AUDIO_STREAM_FEATURE_EQUALIZER;
 838                         else if (strcasecmp(name,"VOL_SND")==0) ret|=AUDIO_STREAM_FEATURE_VOL_SND;
 839                         else if (strcasecmp(name,"VOL_RCV")==0) ret|=AUDIO_STREAM_FEATURE_VOL_RCV;
 840                         else if (strcasecmp(name,"DTMF")==0) ret|=AUDIO_STREAM_FEATURE_DTMF;
 841                         else if (strcasecmp(name,"DTMF_ECHO")==0) ret|=AUDIO_STREAM_FEATURE_DTMF_ECHO;
 842                         else if (strcasecmp(name,"ALL")==0) ret|=AUDIO_STREAM_FEATURE_ALL;
 843                         else if (strcasecmp(name,"NONE")==0) ret=0;
 844                         else ms_error("Unsupported audio feature %s requested in config file.",name);
 845                         if (!n) break;
 846                         p=n;
 847                 }
 848         }else ret=AUDIO_STREAM_FEATURE_ALL;
 849         return ret;
 850 }
 851
 852
 853 #ifdef HAVE_GETIFADDRS
 854
 855 #include <ifaddrs.h>
 856 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
 857 {
 858         struct ifaddrs *ifp;
 859         struct ifaddrs *ifpstart;
 860         int ret = 0;
 861
 862         if (getifaddrs(&ifpstart) < 0) {
 863                 return -1;
 864         }
 865
 866         for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
 867                 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
 868                         && (ifp->ifa_flags & IFF_RUNNING) && !(ifp->ifa_flags & IFF_LOOPBACK))
 869                 {
 870                         getnameinfo(ifp->ifa_addr,
 871                                                 (type == AF_INET6) ?
 872                                                 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
 873                                                 address, size, NULL, 0, NI_NUMERICHOST);
 874                         if (strchr(address, '%') == NULL) {     /*avoid ipv6 link-local addresses */
 875                                 /*ms_message("getifaddrs() found %s",address);*/
 876                                 ret++;
 877                                 break;
 878                         }
 879                 }
 880         }
 881         freeifaddrs(ifpstart);
 882         return ret;
 883 }
 884 #endif
 885
 886
 887 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
 888         int err,tmp;
 889         struct addrinfo hints;
 890         struct addrinfo *res=NULL;
 891         struct sockaddr_storage addr;
 892         struct sockaddr *p_addr=(struct sockaddr*)&addr;
 893         ortp_socket_t sock;
 894         socklen_t s;
 895
 896         memset(&hints,0,sizeof(hints));
 897         hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
 898         hints.ai_socktype=SOCK_DGRAM;
 899         /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
 900         err=getaddrinfo(dest,"5060",&hints,&res);
 901         if (err!=0){
 902                 ms_error("getaddrinfo() error: %s",gai_strerror(err));
 903                 return -1;
 904         }
 905         if (res==NULL){
 906                 ms_error("bug: getaddrinfo returned nothing.");
 907                 return -1;
 908         }
 909         sock=socket(res->ai_family,SOCK_DGRAM,0);
 910         tmp=1;
 911         err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
 912         if (err<0){
 913                 ms_warning("Error in setsockopt: %s",strerror(errno));
 914         }
 915         err=connect(sock,res->ai_addr,res->ai_addrlen);
 916         if (err<0) {
 917                 ms_error("Error in connect: %s",strerror(errno));
 918                 freeaddrinfo(res);
 919                 close_socket(sock);
 920                 return -1;
 921         }
 922         freeaddrinfo(res);
 923         res=NULL;
 924         s=sizeof(addr);
 925         err=getsockname(sock,(struct sockaddr*)&addr,&s);
 926         if (err!=0) {
 927                 ms_error("Error in getsockname: %s",strerror(errno));
 928                 close_socket(sock);
 929                 return -1;
 930         }
 931         if (p_addr->sa_family==AF_INET){
 932                 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
 933                 if (p_sin->sin_addr.s_addr==0){
 934                         close_socket(sock);
 935                         return -1;
 936                 }
 937         }
 938         err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
 939         if (err!=0){
 940                 ms_error("getnameinfo error: %s",strerror(errno));
 941         }
 942         close_socket(sock);
 943         ms_message("Local interface to reach %s is %s.",dest,result);
 944         return 0;
 945 }
 946
 947 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
 948         strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
 949 #ifdef HAVE_GETIFADDRS
 950         if (dest==NULL) {
 951                 /*we use getifaddrs for lookup of default interface */
 952                 int found_ifs;
 953
 954                 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
 955                 if (found_ifs==1){
 956                         return 0;
 957                 }else if (found_ifs<=0){
 958                         /*absolutely no network on this machine */
 959                         return -1;
 960                 }
 961         }
 962 #endif
 963         /*else use connect to find the best local ip address */
 964         if (type==AF_INET)
 965                 dest="87.98.157.38"; /*a public IP address*/
 966         else dest="2a00:1450:8002::68";
 967         return get_local_ip_for_with_connect(type,dest,result);
 968 }
 969
 970 #ifndef WIN32
 971 #include <resolv.h>
 972
 973
 974
 975 void _linphone_core_configure_resolver(){
 976 /*bionic declares _res but does not define nor export it !!*/
 977 #ifdef ANDROID
 978         /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
 979         setenv("RES_OPTIONS","timeout:2 attempts:2 retrans:2 retry:2",1);
 980 #else
 981         res_init();
 982         _res.retrans=2; /*retransmit every two seconds*/
 983         _res.retry=2; /*only two times per DNS server*/
 984 #endif
 985 }
 986
 987 #else
 988
 989 void _linphone_core_configure_resolver(){
 990 }
 991
 992 #endif