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 if (session_state == IS_Running) {
 693                 call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateInProgress;
 694                 if (call->params.has_video && (video_check_list != NULL)) {
 695                         call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateInProgress;
 696                 }
 697         } else {
 698                 call->stats[LINPHONE_CALL_STATS_AUDIO].ice_state = LinphoneIceStateFailed;
 699                 if (call->params.has_video && (video_check_list != NULL)) {
 700                         call->stats[LINPHONE_CALL_STATS_VIDEO].ice_state = LinphoneIceStateFailed;
 701                 }
 702         }
 703 }
 704
 705 void linphone_core_update_local_media_description_from_ice(SalMediaDescription *desc, IceSession *session)
 706 {
 707         const char *rtp_addr, *rtcp_addr;
 708         IceSessionState session_state = ice_session_state(session);
 709         int nb_candidates;
 710         int i, j;
 711         bool_t result;
 712
 713         if (session_state == IS_Completed) {
 714                 desc->ice_completed = TRUE;
 715                 result = ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, 0), &rtp_addr, NULL, NULL, NULL);
 716                 if (result == TRUE) {
 717                         strncpy(desc->addr, rtp_addr, sizeof(desc->addr));
 718                 } else {
 719                         ms_warning("If ICE has completed successfully, rtp_addr should be set!");
 720                 }
 721         }
 722         else {
 723                 desc->ice_completed = FALSE;
 724         }
 725         strncpy(desc->ice_pwd, ice_session_local_pwd(session), sizeof(desc->ice_pwd));
 726         strncpy(desc->ice_ufrag, ice_session_local_ufrag(session), sizeof(desc->ice_ufrag));
 727         for (i = 0; i < desc->nstreams; i++) {
 728                 SalStreamDescription *stream = &desc->streams[i];
 729                 IceCheckList *cl = ice_session_check_list(session, i);
 730                 nb_candidates = 0;
 731                 if (cl == NULL) continue;
 732                 if (ice_check_list_state(cl) == ICL_Completed) {
 733                         stream->ice_completed = TRUE;
 734                         result = ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, i), &rtp_addr, &stream->rtp_port, &rtcp_addr, &stream->rtcp_port);
 735                 } else {
 736                         stream->ice_completed = FALSE;
 737                         result = ice_check_list_default_local_candidate(ice_session_check_list(session, i), &rtp_addr, &stream->rtp_port, &rtcp_addr, &stream->rtcp_port);
 738                 }
 739                 if (result == TRUE) {
 740                         strncpy(stream->rtp_addr, rtp_addr, sizeof(stream->rtp_addr));
 741                         strncpy(stream->rtcp_addr, rtcp_addr, sizeof(stream->rtcp_addr));
 742                 } else {
 743                         memset(stream->rtp_addr, 0, sizeof(stream->rtp_addr));
 744                         memset(stream->rtcp_addr, 0, sizeof(stream->rtcp_addr));
 745                 }
 746                 if ((strlen(ice_check_list_local_pwd(cl)) != strlen(desc->ice_pwd)) || (strcmp(ice_check_list_local_pwd(cl), desc->ice_pwd)))
 747                         strncpy(stream->ice_pwd, ice_check_list_local_pwd(cl), sizeof(stream->ice_pwd));
 748                 else
 749                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 750                 if ((strlen(ice_check_list_local_ufrag(cl)) != strlen(desc->ice_ufrag)) || (strcmp(ice_check_list_local_ufrag(cl), desc->ice_ufrag)))
 751                         strncpy(stream->ice_ufrag, ice_check_list_local_ufrag(cl), sizeof(stream->ice_ufrag));
 752                 else
 753                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 754                 stream->ice_mismatch = ice_check_list_is_mismatch(cl);
 755                 if ((ice_check_list_state(cl) == ICL_Running) || (ice_check_list_state(cl) == ICL_Completed)) {
 756                         memset(stream->ice_candidates, 0, sizeof(stream->ice_candidates));
 757                         for (j = 0; j < MIN(ms_list_size(cl->local_candidates), SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES); j++) {
 758                                 SalIceCandidate *sal_candidate = &stream->ice_candidates[nb_candidates];
 759                                 IceCandidate *ice_candidate = ms_list_nth_data(cl->local_candidates, j);
 760                                 const char *default_addr = NULL;
 761                                 int default_port = 0;
 762                                 if (ice_candidate->componentID == 1) {
 763                                         default_addr = stream->rtp_addr;
 764                                         default_port = stream->rtp_port;
 765                                 } else if (ice_candidate->componentID == 2) {
 766                                         default_addr = stream->rtcp_addr;
 767                                         default_port = stream->rtcp_port;
 768                                 } else continue;
 769                                 if (default_addr[0] == '\0') default_addr = desc->addr;
 770                                 /* 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. */
 771                                 if ((ice_check_list_state(cl) == ICL_Completed)
 772                                         && !((ice_candidate->taddr.port == default_port) && (strlen(ice_candidate->taddr.ip) == strlen(default_addr)) && (strcmp(ice_candidate->taddr.ip, default_addr) == 0)))
 773                                         continue;
 774                                 strncpy(sal_candidate->foundation, ice_candidate->foundation, sizeof(sal_candidate->foundation));
 775                                 sal_candidate->componentID = ice_candidate->componentID;
 776                                 sal_candidate->priority = ice_candidate->priority;
 777                                 strncpy(sal_candidate->type, ice_candidate_type(ice_candidate), sizeof(sal_candidate->type));
 778                                 strncpy(sal_candidate->addr, ice_candidate->taddr.ip, sizeof(sal_candidate->addr));
 779                                 sal_candidate->port = ice_candidate->taddr.port;
 780                                 if ((ice_candidate->base != NULL) && (ice_candidate->base != ice_candidate)) {
 781                                         strncpy(sal_candidate->raddr, ice_candidate->base->taddr.ip, sizeof(sal_candidate->raddr));
 782                                         sal_candidate->rport = ice_candidate->base->taddr.port;
 783                                 }
 784                                 nb_candidates++;
 785                         }
 786                 }
 787                 if ((ice_check_list_state(cl) == ICL_Completed) && (ice_session_role(session) == IR_Controlling)) {
 788                         int rtp_port, rtcp_port;
 789                         memset(stream->ice_remote_candidates, 0, sizeof(stream->ice_remote_candidates));
 790                         if (ice_check_list_selected_valid_remote_candidate(cl, &rtp_addr, &rtp_port, &rtcp_addr, &rtcp_port) == TRUE) {
 791                                 strncpy(stream->ice_remote_candidates[0].addr, rtp_addr, sizeof(stream->ice_remote_candidates[0].addr));
 792                                 stream->ice_remote_candidates[0].port = rtp_port;
 793                                 strncpy(stream->ice_remote_candidates[1].addr, rtcp_addr, sizeof(stream->ice_remote_candidates[1].addr));
 794                                 stream->ice_remote_candidates[1].port = rtcp_port;
 795                         } else {
 796                                 ms_error("ice: Selected valid remote candidates should be present if the check list is in the Completed state");
 797                         }
 798                 }
 799         }
 800 }
 801
 802 static void get_default_addr_and_port(uint16_t componentID, const SalMediaDescription *md, const SalStreamDescription *stream, const char **addr, int *port)
 803 {
 804         if (componentID == 1) {
 805                 *addr = stream->rtp_addr;
 806                 *port = stream->rtp_port;
 807         } else if (componentID == 2) {
 808                 *addr = stream->rtcp_addr;
 809                 *port = stream->rtcp_port;
 810         } else return;
 811         if ((*addr)[0] == '\0') *addr = md->addr;
 812 }
 813
 814 void linphone_core_update_ice_from_remote_media_description(LinphoneCall *call, const SalMediaDescription *md)
 815 {
 816         bool_t ice_restarted = FALSE;
 817
 818         if ((md->ice_pwd[0] != '\0') && (md->ice_ufrag[0] != '\0')) {
 819                 int i, j;
 820
 821                 /* Check for ICE restart and set remote credentials. */
 822                 if ((strcmp(md->addr, "0.0.0.0") == 0) || (strcmp(md->addr, "::0") == 0)) {
 823                         ice_session_restart(call->ice_session);
 824                         ice_restarted = TRUE;
 825                 } else {
 826                         for (i = 0; i < md->nstreams; i++) {
 827                                 const SalStreamDescription *stream = &md->streams[i];
 828                                 IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 829                                 if (cl && (strcmp(stream->rtp_addr, "0.0.0.0") == 0)) {
 830                                         ice_session_restart(call->ice_session);
 831                                         ice_restarted = TRUE;
 832                                         break;
 833                                 }
 834                         }
 835                 }
 836                 if ((ice_session_remote_ufrag(call->ice_session) == NULL) && (ice_session_remote_pwd(call->ice_session) == NULL)) {
 837                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 838                 } else if (ice_session_remote_credentials_changed(call->ice_session, md->ice_ufrag, md->ice_pwd)) {
 839                         if (ice_restarted == FALSE) {
 840                                 ice_session_restart(call->ice_session);
 841                                 ice_restarted = TRUE;
 842                         }
 843                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 844                 }
 845                 for (i = 0; i < md->nstreams; i++) {
 846                         const SalStreamDescription *stream = &md->streams[i];
 847                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 848                         if (cl && (stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0')) {
 849                                 if (ice_check_list_remote_credentials_changed(cl, stream->ice_ufrag, stream->ice_pwd)) {
 850                                         if (ice_restarted == FALSE) {
 851                                                 ice_session_restart(call->ice_session);
 852                                                 ice_restarted = TRUE;
 853                                         }
 854                                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 855                                         break;
 856                                 }
 857                         }
 858                 }
 859
 860                 /* Create ICE check lists if needed and parse ICE attributes. */
 861                 for (i = 0; i < md->nstreams; i++) {
 862                         const SalStreamDescription *stream = &md->streams[i];
 863                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 864                         if (cl == NULL) {
 865                                 cl = ice_check_list_new();
 866                                 ice_session_add_check_list(call->ice_session, cl);
 867                                 switch (stream->type) {
 868                                         case SalAudio:
 869                                                 if (call->audiostream != NULL) call->audiostream->ice_check_list = cl;
 870                                                 break;
 871                                         case SalVideo:
 872                                                 if (call->videostream != NULL) call->videostream->ice_check_list = cl;
 873                                                 break;
 874                                         default:
 875                                                 break;
 876                                 }
 877                         }
 878                         if (stream->ice_mismatch == TRUE) {
 879                                 ice_check_list_set_state(cl, ICL_Failed);
 880                         } else if (stream->rtp_port == 0) {
 881                                 ice_session_remove_check_list(call->ice_session, ice_session_check_list(call->ice_session, i));
 882                         } else {
 883                                 if ((stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0'))
 884                                         ice_check_list_set_remote_credentials(cl, stream->ice_ufrag, stream->ice_pwd);
 885                                 for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES; j++) {
 886                                         const SalIceCandidate *candidate = &stream->ice_candidates[j];
 887                                         bool_t default_candidate = FALSE;
 888                                         const char *addr = NULL;
 889                                         int port = 0;
 890                                         if (candidate->addr[0] == '\0') break;
 891                                         if ((candidate->componentID == 0) || (candidate->componentID > 2)) continue;
 892                                         get_default_addr_and_port(candidate->componentID, md, stream, &addr, &port);
 893                                         if (addr && (candidate->port == port) && (strlen(candidate->addr) == strlen(addr)) && (strcmp(candidate->addr, addr) == 0))
 894                                                 default_candidate = TRUE;
 895                                         ice_add_remote_candidate(cl, candidate->type, candidate->addr, candidate->port, candidate->componentID,
 896                                                 candidate->priority, candidate->foundation, default_candidate);
 897                                 }
 898                                 if (ice_restarted == FALSE) {
 899                                         bool_t losing_pairs_added = FALSE;
 900                                         for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_REMOTE_CANDIDATES; j++) {
 901                                                 const SalIceRemoteCandidate *candidate = &stream->ice_remote_candidates[j];
 902                                                 const char *addr = NULL;
 903                                                 int port = 0;
 904                                                 int componentID = j + 1;
 905                                                 if (candidate->addr[0] == '\0') break;
 906                                                 get_default_addr_and_port(componentID, md, stream, &addr, &port);
 907                                                 if (j == 0) {
 908                                                         /* If we receive a re-invite and we finished ICE processing on our side, use the candidates given by the remote. */
 909                                                         ice_check_list_unselect_valid_pairs(cl);
 910                                                 }
 911                                                 ice_add_losing_pair(cl, j + 1, candidate->addr, candidate->port, addr, port);
 912                                                 losing_pairs_added = TRUE;
 913                                         }
 914                                         if (losing_pairs_added == TRUE) ice_check_list_check_completed(cl);
 915                                 }
 916                         }
 917                 }
 918                 for (i = ice_session_nb_check_lists(call->ice_session); i > md->nstreams; i--) {
 919                         ice_session_remove_check_list(call->ice_session, ice_session_check_list(call->ice_session, i - 1));
 920                 }
 921                 ice_session_check_mismatch(call->ice_session);
 922         } else {
 923                 /* Response from remote does not contain mandatory ICE attributes, delete the session. */
 924                 linphone_call_delete_ice_session(call);
 925                 return;
 926         }
 927         if (ice_session_nb_check_lists(call->ice_session) == 0) {
 928                 linphone_call_delete_ice_session(call);
 929         }
 930 }
 931
 932 bool_t linphone_core_media_description_contains_video_stream(const SalMediaDescription *md)
 933 {
 934         int i;
 935
 936         for (i = 0; i < md->nstreams; i++) {
 937                 if ((md->streams[i].type == SalVideo) && (md->streams[i].rtp_port != 0))
 938                         return TRUE;
 939         }
 940         return FALSE;
 941 }
 942
 943 void linphone_core_deactivate_ice_for_deactivated_media_streams(LinphoneCall *call, const SalMediaDescription *md)
 944 {
 945         int i;
 946         for (i = 0; i < md->nstreams; i++) {
 947                 IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 948                 if (cl && (md->streams[i].rtp_port == 0)) {
 949                         if (ice_check_list_state(cl) != ICL_Completed) {
 950                                 ice_session_remove_check_list(call->ice_session, cl);
 951                         }
 952                 }
 953         }
 954 }
 955
 956 LinphoneCall * is_a_linphone_call(void *user_pointer){
 957         LinphoneCall *call=(LinphoneCall*)user_pointer;
 958         if (call==NULL) return NULL;
 959         return call->magic==linphone_call_magic ? call : NULL;
 960 }
 961
 962 LinphoneProxyConfig * is_a_linphone_proxy_config(void *user_pointer){
 963         LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)user_pointer;
 964         if (cfg==NULL) return NULL;
 965         return cfg->magic==linphone_proxy_config_magic ? cfg : NULL;
 966 }
 967
 968 unsigned int linphone_core_get_audio_features(LinphoneCore *lc){
 969         unsigned int ret=0;
 970         const char *features=lp_config_get_string(lc->config,"sound","features",NULL);
 971         if (features){
 972                 char tmp[256]={0};
 973                 char name[256];
 974                 char *p,*n;
 975                 strncpy(tmp,features,sizeof(tmp)-1);
 976                 for(p=tmp;*p!='\0';p++){
 977                         if (*p==' ') continue;
 978                         n=strchr(p,'|');
 979                         if (n) *n='\0';
 980                         sscanf(p,"%s",name);
 981                         ms_message("Found audio feature %s",name);
 982                         if (strcasecmp(name,"PLC")==0) ret|=AUDIO_STREAM_FEATURE_PLC;
 983                         else if (strcasecmp(name,"EC")==0) ret|=AUDIO_STREAM_FEATURE_EC;
 984                         else if (strcasecmp(name,"EQUALIZER")==0) ret|=AUDIO_STREAM_FEATURE_EQUALIZER;
 985                         else if (strcasecmp(name,"VOL_SND")==0) ret|=AUDIO_STREAM_FEATURE_VOL_SND;
 986                         else if (strcasecmp(name,"VOL_RCV")==0) ret|=AUDIO_STREAM_FEATURE_VOL_RCV;
 987                         else if (strcasecmp(name,"DTMF")==0) ret|=AUDIO_STREAM_FEATURE_DTMF;
 988                         else if (strcasecmp(name,"DTMF_ECHO")==0) ret|=AUDIO_STREAM_FEATURE_DTMF_ECHO;
 989                         else if (strcasecmp(name,"ALL")==0) ret|=AUDIO_STREAM_FEATURE_ALL;
 990                         else if (strcasecmp(name,"NONE")==0) ret=0;
 991                         else ms_error("Unsupported audio feature %s requested in config file.",name);
 992                         if (!n) break;
 993                         p=n;
 994                 }
 995         }else ret=AUDIO_STREAM_FEATURE_ALL;
 996         return ret;
 997 }
 998
 999
1000 #ifdef HAVE_GETIFADDRS
1001
1002 #include <ifaddrs.h>
1003 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
1004 {
1005         struct ifaddrs *ifp;
1006         struct ifaddrs *ifpstart;
1007         int ret = 0;
1008
1009         if (getifaddrs(&ifpstart) < 0) {
1010                 return -1;
1011         }
1012 #ifndef __linux
1013         #define UP_FLAG IFF_UP /* interface is up */
1014 #else
1015         #define UP_FLAG IFF_RUNNING /* resources allocated */
1016 #endif
1017
1018         for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
1019                 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
1020                         && (ifp->ifa_flags & UP_FLAG) && !(ifp->ifa_flags & IFF_LOOPBACK))
1021                 {
1022                         getnameinfo(ifp->ifa_addr,
1023                                                 (type == AF_INET6) ?
1024                                                 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
1025                                                 address, size, NULL, 0, NI_NUMERICHOST);
1026                         if (strchr(address, '%') == NULL) {     /*avoid ipv6 link-local addresses */
1027                                 /*ms_message("getifaddrs() found %s",address);*/
1028                                 ret++;
1029                                 break;
1030                         }
1031                 }
1032         }
1033         freeifaddrs(ifpstart);
1034         return ret;
1035 }
1036 #endif
1037
1038
1039 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
1040         int err,tmp;
1041         struct addrinfo hints;
1042         struct addrinfo *res=NULL;
1043         struct sockaddr_storage addr;
1044         struct sockaddr *p_addr=(struct sockaddr*)&addr;
1045         ortp_socket_t sock;
1046         socklen_t s;
1047
1048         memset(&hints,0,sizeof(hints));
1049         hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
1050         hints.ai_socktype=SOCK_DGRAM;
1051         /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
1052         err=getaddrinfo(dest,"5060",&hints,&res);
1053         if (err!=0){
1054                 ms_error("getaddrinfo() error: %s",gai_strerror(err));
1055                 return -1;
1056         }
1057         if (res==NULL){
1058                 ms_error("bug: getaddrinfo returned nothing.");
1059                 return -1;
1060         }
1061         sock=socket(res->ai_family,SOCK_DGRAM,0);
1062         tmp=1;
1063         err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
1064         if (err<0){
1065                 ms_warning("Error in setsockopt: %s",strerror(errno));
1066         }
1067         err=connect(sock,res->ai_addr,res->ai_addrlen);
1068         if (err<0) {
1069                 ms_error("Error in connect: %s",strerror(errno));
1070                 freeaddrinfo(res);
1071                 close_socket(sock);
1072                 return -1;
1073         }
1074         freeaddrinfo(res);
1075         res=NULL;
1076         s=sizeof(addr);
1077         err=getsockname(sock,(struct sockaddr*)&addr,&s);
1078         if (err!=0) {
1079                 ms_error("Error in getsockname: %s",strerror(errno));
1080                 close_socket(sock);
1081                 return -1;
1082         }
1083         if (p_addr->sa_family==AF_INET){
1084                 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
1085                 if (p_sin->sin_addr.s_addr==0){
1086                         close_socket(sock);
1087                         return -1;
1088                 }
1089         }
1090         err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
1091         if (err!=0){
1092                 ms_error("getnameinfo error: %s",strerror(errno));
1093         }
1094         close_socket(sock);
1095         ms_message("Local interface to reach %s is %s.",dest,result);
1096         return 0;
1097 }
1098
1099 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
1100         strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
1101 #ifdef HAVE_GETIFADDRS
1102         if (dest==NULL) {
1103                 /*we use getifaddrs for lookup of default interface */
1104                 int found_ifs;
1105
1106                 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
1107                 if (found_ifs==1){
1108                         return 0;
1109                 }else if (found_ifs<=0){
1110                         /*absolutely no network on this machine */
1111                         return -1;
1112                 }
1113         }
1114 #endif
1115         /*else use connect to find the best local ip address */
1116         if (type==AF_INET)
1117                 dest="87.98.157.38"; /*a public IP address*/
1118         else dest="2a00:1450:8002::68";
1119         return get_local_ip_for_with_connect(type,dest,result);
1120 }
1121
1122 #ifndef WIN32
1123 #include <resolv.h>
1124
1125
1126
1127 void _linphone_core_configure_resolver(){
1128 /*bionic declares _res but does not define nor export it !!*/
1129 #ifdef ANDROID
1130         /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
1131         setenv("RES_OPTIONS","timeout:2 attempts:2 retrans:2 retry:2",1);
1132 #else
1133         res_init();
1134         _res.retrans=2; /*retransmit every two seconds*/
1135         _res.retry=2; /*only two times per DNS server*/
1136 #endif
1137 }
1138
1139 #else
1140
1141 void _linphone_core_configure_resolver(){
1142 }
1143
1144 #endif