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

   1 /*
   2 linphone
   3 Copyright (C) 2010  Simon MORLAT (simon.morlat@free.fr)
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18 */
  19
  20
  21 #include "sal.h"
  22
  23 #include "linphonecore.h"
  24 #include "private.h"
  25 #include "mediastreamer2/mediastream.h"
  26 #include "lpconfig.h"
  27
  28 static void register_failure(SalOp *op, SalError error, SalReason reason, const char *details);
  29
  30 static bool_t media_parameters_changed(LinphoneCall *call, SalMediaDescription *oldmd, SalMediaDescription *newmd){
  31         if (call->params.in_conference!=call->current_params.in_conference) return TRUE;
  32         return !sal_media_description_equals(oldmd,newmd)  || call->up_bw!=linphone_core_get_upload_bandwidth(call->core);
  33 }
  34
  35 void linphone_core_update_streams(LinphoneCore *lc, LinphoneCall *call, SalMediaDescription *new_md){
  36         SalMediaDescription *oldmd=call->resultdesc;
  37
  38         if (lc->ringstream!=NULL){
  39                 ring_stop(lc->ringstream);
  40                 lc->ringstream=NULL;
  41         }
  42         if (new_md!=NULL){
  43                 sal_media_description_ref(new_md);
  44                 call->media_pending=FALSE;
  45         }else{
  46                 call->media_pending=TRUE;
  47         }
  48         call->resultdesc=new_md;
  49         if (call->ice_session != NULL) {
  50                 linphone_core_deactivate_ice_for_deactivated_media_streams(call, call->resultdesc);
  51         }
  52         if ((call->audiostream && call->audiostream->ticker) || (call->videostream && call->videostream->ticker)){
  53                 /* we already started media: check if we really need to restart it*/
  54                 if (oldmd){
  55                         if (!media_parameters_changed(call,oldmd,new_md) && !call->playing_ringbacktone){
  56                                 /*as nothing has changed, keep the oldmd */
  57                                 call->resultdesc=oldmd;
  58                                 sal_media_description_unref(new_md);
  59                                 if (call->all_muted){
  60                                         ms_message("Early media finished, unmuting inputs...");
  61                                         /*we were in early media, now we want to enable real media */
  62                                         linphone_call_enable_camera (call,linphone_call_camera_enabled (call));
  63                                         if (call->audiostream)
  64                                                 linphone_core_mute_mic (lc, linphone_core_is_mic_muted(lc));
  65 #ifdef VIDEO_ENABLED
  66                                         if (call->videostream && call->camera_active)
  67                                                 video_stream_change_camera(call->videostream,lc->video_conf.device );
  68 #endif
  69                                 }
  70                                 ms_message("No need to restart streams, SDP is unchanged.");
  71                                 return;
  72                         }else{
  73                                 ms_message("Media descriptions are different, need to restart the streams.");
  74                         }
  75                 }
  76                 linphone_call_stop_media_streams (call);
  77                 linphone_call_init_media_streams (call);
  78         }
  79         if (oldmd)
  80                 sal_media_description_unref(oldmd);
  81
  82         if (new_md) {
  83                 bool_t all_muted=FALSE;
  84                 bool_t send_ringbacktone=FALSE;
  85
  86                 if (call->audiostream==NULL){
  87                         /*this happens after pausing the call locally. The streams is destroyed and then we wait the 200Ok to recreate it*/
  88                         linphone_call_init_media_streams (call);
  89                 }
  90                 if (call->state==LinphoneCallIncomingEarlyMedia && linphone_core_get_remote_ringback_tone (lc)!=NULL){
  91                         send_ringbacktone=TRUE;
  92                 }
  93                 if (call->state==LinphoneCallIncomingEarlyMedia ||
  94                     (call->state==LinphoneCallOutgoingEarlyMedia && !call->params.real_early_media)){
  95                         all_muted=TRUE;
  96                 }
  97                 linphone_call_start_media_streams(call,all_muted,send_ringbacktone);
  98         }
  99 }
 100 #if 0
 101 static bool_t is_duplicate_call(LinphoneCore *lc, const LinphoneAddress *from, const LinphoneAddress *to){
 102         MSList *elem;
 103         for(elem=lc->calls;elem!=NULL;elem=elem->next){
 104                 LinphoneCall *call=(LinphoneCall*)elem->data;
 105                 if (linphone_address_weak_equal(call->log->from,from) &&
 106                     linphone_address_weak_equal(call->log->to, to)){
 107                         return TRUE;
 108                 }
 109         }
 110         return FALSE;
 111 }
 112 #endif
 113
 114 static bool_t already_a_call_with_remote_address(const LinphoneCore *lc, const LinphoneAddress *remote) {
 115         ms_warning(" searching for already_a_call_with_remote_address.");
 116
 117         MSList *elem;
 118         for(elem=lc->calls;elem!=NULL;elem=elem->next){
 119                 const LinphoneCall *call=(LinphoneCall*)elem->data;
 120                 const LinphoneAddress *cRemote=linphone_call_get_remote_address(call);
 121                 if (linphone_address_weak_equal(cRemote,remote)) {
 122                         ms_warning("already_a_call_with_remote_address found.");
 123                         return TRUE;
 124                 }
 125         }
 126         return FALSE;
 127 }
 128
 129 static bool_t already_a_call_pending(LinphoneCore *lc){
 130         MSList *elem;
 131         for(elem=lc->calls;elem!=NULL;elem=elem->next){
 132                 LinphoneCall *call=(LinphoneCall*)elem->data;
 133                 if (call->state==LinphoneCallIncomingReceived
 134                     || call->state==LinphoneCallOutgoingInit
 135                     || call->state==LinphoneCallOutgoingProgress
 136                     || call->state==LinphoneCallOutgoingEarlyMedia
 137                     || call->state==LinphoneCallOutgoingRinging){
 138                         return TRUE;
 139                 }
 140         }
 141         return FALSE;
 142 }
 143
 144 static void call_received(SalOp *h){
 145         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(h));
 146         LinphoneCall *call;
 147         const char *from,*to;
 148         LinphoneAddress *from_addr, *to_addr;
 149         bool_t prevent_colliding_calls=lp_config_get_int(lc->config,"sip","prevent_colliding_calls",TRUE);
 150
 151         /* first check if we can answer successfully to this invite */
 152         if (lc->presence_mode==LinphoneStatusBusy ||
 153             lc->presence_mode==LinphoneStatusOffline ||
 154             lc->presence_mode==LinphoneStatusDoNotDisturb ||
 155             lc->presence_mode==LinphoneStatusMoved){
 156                 if (lc->presence_mode==LinphoneStatusBusy )
 157                         sal_call_decline(h,SalReasonBusy,NULL);
 158                 else if (lc->presence_mode==LinphoneStatusOffline)
 159                         sal_call_decline(h,SalReasonTemporarilyUnavailable,NULL);
 160                 else if (lc->presence_mode==LinphoneStatusDoNotDisturb)
 161                         sal_call_decline(h,SalReasonTemporarilyUnavailable,NULL);
 162                 else if (lc->alt_contact!=NULL && lc->presence_mode==LinphoneStatusMoved)
 163                         sal_call_decline(h,SalReasonRedirect,lc->alt_contact);
 164                 sal_op_release(h);
 165                 return;
 166         }
 167         if (!linphone_core_can_we_add_call(lc)){/*busy*/
 168                 sal_call_decline(h,SalReasonBusy,NULL);
 169                 sal_op_release(h);
 170                 return;
 171         }
 172         from=sal_op_get_from(h);
 173         to=sal_op_get_to(h);
 174         from_addr=linphone_address_new(from);
 175         to_addr=linphone_address_new(to);
 176
 177         if ((already_a_call_with_remote_address(lc,from_addr) && prevent_colliding_calls) || already_a_call_pending(lc)){
 178                 ms_warning("Receiving another call while one is ringing or initiated, refusing this one with busy message.");
 179                 sal_call_decline(h,SalReasonBusy,NULL);
 180                 sal_op_release(h);
 181                 linphone_address_destroy(from_addr);
 182                 linphone_address_destroy(to_addr);
 183                 return;
 184         }
 185
 186         call=linphone_call_new_incoming(lc,from_addr,to_addr,h);
 187         sal_call_set_local_media_description(h,call->localdesc);
 188
 189         /* the call is acceptable so we can now add it to our list */
 190         linphone_core_add_call(lc,call);
 191         linphone_call_ref(call); /*prevent the call from being destroyed while we are notifying, if the user declines within the state callback */
 192
 193         if ((linphone_core_get_firewall_policy(lc) == LinphonePolicyUseIce) && (call->ice_session != NULL)) {
 194                 /* Defer ringing until the end of the ICE candidates gathering process. */
 195                 ms_message("Defer ringing to gather ICE candidates");
 196                 return;
 197         }
 198
 199         linphone_core_notify_incoming_call(lc,call);
 200 }
 201
 202 static void call_ringing(SalOp *h){
 203         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(h));
 204         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(h);
 205         SalMediaDescription *md;
 206
 207         if (call==NULL) return;
 208
 209         if (lc->vtable.display_status)
 210                 lc->vtable.display_status(lc,_("Remote ringing."));
 211
 212         md=sal_call_get_final_media_description(h);
 213         if (md==NULL){
 214                 if (lc->ringstream && lc->dmfs_playing_start_time!=0){
 215                         ring_stop(lc->ringstream);
 216                         lc->ringstream=NULL;
 217                         lc->dmfs_playing_start_time=0;
 218                 }
 219                 if (lc->ringstream!=NULL) return;       /*already ringing !*/
 220                 if (lc->sound_conf.play_sndcard!=NULL){
 221                         MSSndCard *ringcard=lc->sound_conf.lsd_card ? lc->sound_conf.lsd_card : lc->sound_conf.play_sndcard;
 222                         if (call->localdesc->streams[0].max_rate>0) ms_snd_card_set_preferred_sample_rate(ringcard, call->localdesc->streams[0].max_rate);
 223                         /*we release sound before playing ringback tone*/
 224                         if (call->audiostream)
 225                                 audio_stream_unprepare_sound(call->audiostream);
 226                         lc->ringstream=ring_start(lc->sound_conf.remote_ring,2000,ringcard);
 227                 }
 228                 ms_message("Remote ringing...");
 229                 if (lc->vtable.display_status)
 230                         lc->vtable.display_status(lc,_("Remote ringing..."));
 231                 linphone_call_set_state(call,LinphoneCallOutgoingRinging,"Remote ringing");
 232         }else{
 233                 /*accept early media */
 234                 if (call->audiostream && audio_stream_started(call->audiostream)){
 235                         /*streams already started */
 236                         ms_message("Early media already started.");
 237                         return;
 238                 }
 239                 if (lc->vtable.show) lc->vtable.show(lc);
 240                 if (lc->vtable.display_status)
 241                         lc->vtable.display_status(lc,_("Early media."));
 242                 linphone_call_set_state(call,LinphoneCallOutgoingEarlyMedia,"Early media");
 243                 if (lc->ringstream!=NULL){
 244                         ring_stop(lc->ringstream);
 245                         lc->ringstream=NULL;
 246                 }
 247                 ms_message("Doing early media...");
 248                 linphone_core_update_streams(lc,call,md);
 249         }
 250 }
 251
 252 /*
 253  * could be reach :
 254  *  - when the call is accepted
 255  *  - when a request is accepted (pause, resume)
 256  */
 257 static void call_accepted(SalOp *op){
 258         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 259         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 260         SalMediaDescription *md;
 261
 262         if (call==NULL){
 263                 ms_warning("No call to accept.");
 264                 return ;
 265         }
 266
 267         /* Handle remote ICE attributes if any. */
 268         if (call->ice_session != NULL) {
 269                 linphone_core_update_ice_from_remote_media_description(call, sal_call_get_remote_media_description(op));
 270         }
 271
 272         md=sal_call_get_final_media_description(op);
 273
 274         if (call->state==LinphoneCallOutgoingProgress ||
 275             call->state==LinphoneCallOutgoingRinging ||
 276             call->state==LinphoneCallOutgoingEarlyMedia){
 277                 linphone_call_set_state(call,LinphoneCallConnected,"Connected");
 278                 if (call->referer) linphone_core_notify_refer_state(lc,call->referer,call);
 279         }
 280         if (md && !sal_media_description_empty(md)){
 281                 if (sal_media_description_has_dir(md,SalStreamSendOnly) ||
 282                     sal_media_description_has_dir(md,SalStreamInactive)){
 283                         if (lc->vtable.display_status){
 284                                 char *tmp=linphone_call_get_remote_address_as_string (call);
 285                                 char *msg=ms_strdup_printf(_("Call with %s is paused."),tmp);
 286                                 lc->vtable.display_status(lc,msg);
 287                                 ms_free(tmp);
 288                                 ms_free(msg);
 289                         }
 290                         linphone_core_update_streams (lc,call,md);
 291                         linphone_call_set_state(call,LinphoneCallPaused,"Call paused");
 292                         if (call->refer_pending)
 293                                 linphone_core_start_refered_call(lc,call);
 294                 }else if (sal_media_description_has_dir(md,SalStreamRecvOnly)){
 295                         /*we are put on hold when the call is initially accepted */
 296                         if (lc->vtable.display_status){
 297                                 char *tmp=linphone_call_get_remote_address_as_string (call);
 298                                 char *msg=ms_strdup_printf(_("Call answered by %s - on hold."),tmp);
 299                                 lc->vtable.display_status(lc,msg);
 300                                 ms_free(tmp);
 301                                 ms_free(msg);
 302                         }
 303                         linphone_core_update_streams (lc,call,md);
 304                         linphone_call_set_state(call,LinphoneCallPausedByRemote,"Call paused by remote");
 305                 }else{
 306                         if (call->state==LinphoneCallStreamsRunning){
 307                                 /*media was running before, the remote as acceted a call modification (that is
 308                                         a reinvite made by us. We must notify the application this reinvite was accepted*/
 309                                 linphone_call_set_state(call, LinphoneCallUpdated, "Call updated");
 310                         }else{
 311                                 if (call->state==LinphoneCallResuming){
 312                                         if (lc->vtable.display_status){
 313                                                 lc->vtable.display_status(lc,_("Call resumed."));
 314                                         }
 315                                 }else{
 316                                         if (lc->vtable.display_status){
 317                                                 char *tmp=linphone_call_get_remote_address_as_string (call);
 318                                                 char *msg=ms_strdup_printf(_("Call answered by %s."),tmp);
 319                                                 lc->vtable.display_status(lc,msg);
 320                                                 ms_free(tmp);
 321                                                 ms_free(msg);
 322                                         }
 323                                 }
 324                         }
 325                         linphone_core_update_streams (lc,call,md);
 326                         if (!call->current_params.in_conference)
 327                                 lc->current_call=call;
 328                         linphone_call_set_state(call, LinphoneCallStreamsRunning, "Streams running");
 329                 }
 330         }else{
 331                 /*send a bye*/
 332                 ms_error("Incompatible SDP offer received in 200Ok, need to abort the call");
 333                 linphone_core_abort_call(lc,call,_("Incompatible, check codecs..."));
 334         }
 335 }
 336
 337 static void call_ack(SalOp *op){
 338         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 339         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 340         if (call==NULL){
 341                 ms_warning("No call to be ACK'd");
 342                 return ;
 343         }
 344         if (call->media_pending){
 345                 SalMediaDescription *md=sal_call_get_final_media_description(op);
 346                 if (md && !sal_media_description_empty(md)){
 347                         if (call->state==LinphoneCallStreamsRunning){
 348                                 /*media was running before, the remote as acceted a call modification (that is
 349                                         a reinvite made by us. We must notify the application this reinvite was accepted*/
 350                                 linphone_call_set_state(call, LinphoneCallUpdated, "Call updated");
 351                         }
 352                         linphone_core_update_streams (lc,call,md);
 353                         linphone_call_set_state (call,LinphoneCallStreamsRunning,"Connected (streams running)");
 354                 }else{
 355                         /*send a bye*/
 356                         ms_error("Incompatible SDP response received in ACK, need to abort the call");
 357                         linphone_core_abort_call(lc,call,"No codec intersection");
 358                         return;
 359                 }
 360         }
 361 }
 362
 363 static void call_accept_update(LinphoneCore *lc, LinphoneCall *call){
 364         SalMediaDescription *md;
 365         SalMediaDescription *rmd=sal_call_get_remote_media_description(call->op);
 366         if ((rmd!=NULL) && (call->ice_session!=NULL)) {
 367                 linphone_core_update_ice_from_remote_media_description(call,rmd);
 368                 linphone_core_update_local_media_description_from_ice(call->localdesc,call->ice_session);
 369         }
 370         sal_call_accept(call->op);
 371         md=sal_call_get_final_media_description(call->op);
 372         if (md && !sal_media_description_empty(md))
 373                 linphone_core_update_streams(lc,call,md);
 374 }
 375
 376 static void call_resumed(LinphoneCore *lc, LinphoneCall *call){
 377         call_accept_update(lc,call);
 378         if(lc->vtable.display_status)
 379                 lc->vtable.display_status(lc,_("We have been resumed."));
 380         linphone_call_set_state(call,LinphoneCallStreamsRunning,"Connected (streams running)");
 381         linphone_call_set_transfer_state(call, LinphoneCallIdle);
 382 }
 383
 384 static void call_paused_by_remote(LinphoneCore *lc, LinphoneCall *call){
 385         call_accept_update(lc,call);
 386         /* we are being paused */
 387         if(lc->vtable.display_status)
 388                 lc->vtable.display_status(lc,_("We are paused by other party."));
 389         linphone_call_set_state (call,LinphoneCallPausedByRemote,"Call paused by remote");
 390 }
 391
 392 static void call_updated_by_remote(LinphoneCore *lc, LinphoneCall *call){
 393         if(lc->vtable.display_status)
 394                 lc->vtable.display_status(lc,_("Call is updated by remote."));
 395         call->defer_update=FALSE;
 396         linphone_call_set_state(call, LinphoneCallUpdatedByRemote,"Call updated by remote");
 397         if (call->defer_update==FALSE){
 398                 linphone_core_accept_call_update(lc,call,NULL);
 399         }
 400 }
 401
 402 /* this callback is called when an incoming re-INVITE modifies the session*/
 403 static void call_updating(SalOp *op){
 404         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 405         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 406         SalMediaDescription *rmd=sal_call_get_remote_media_description(op);
 407
 408         if (rmd==NULL){
 409                 /* case of a reINVITE without SDP */
 410                 call_accept_update(lc,call);
 411                 call->media_pending=TRUE;
 412                 return;
 413         }
 414
 415         switch(call->state){
 416                 case LinphoneCallPausedByRemote:
 417                         if (sal_media_description_has_dir(rmd,SalStreamSendRecv) || sal_media_description_has_dir(rmd,SalStreamRecvOnly)){
 418                                 call_resumed(lc,call);
 419                         }else call_paused_by_remote(lc,call);
 420                 break;
 421                 case LinphoneCallStreamsRunning:
 422                 case LinphoneCallConnected:
 423                         if (sal_media_description_has_dir(rmd,SalStreamSendOnly) || sal_media_description_has_dir(rmd,SalStreamInactive)){
 424                                 call_paused_by_remote(lc,call);
 425                         }else{
 426                                 call_updated_by_remote(lc,call);
 427                         }
 428                 break;
 429                 default:
 430                         call_accept_update(lc,call);
 431         }
 432 }
 433
 434 static void call_terminated(SalOp *op, const char *from){
 435         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 436         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 437
 438         if (call==NULL) return;
 439
 440         switch(linphone_call_get_state(call)){
 441                 case LinphoneCallEnd:
 442                 case LinphoneCallError:
 443                         ms_warning("call_terminated: ignoring.");
 444                         return;
 445                 break;
 446                 case LinphoneCallIncomingReceived:
 447                 case LinphoneCallIncomingEarlyMedia:
 448                         call->reason=LinphoneReasonNotAnswered;
 449                 break;
 450                 default:
 451                 break;
 452         }
 453         ms_message("Current call terminated...");
 454         //we stop the call only if we have this current call or if we are in call
 455         if (lc->ringstream!=NULL && ( (ms_list_size(lc->calls)  == 1) || linphone_core_in_call(lc) )) {
 456                 ring_stop(lc->ringstream);
 457                 lc->ringstream=NULL;
 458         }
 459         linphone_call_stop_media_streams(call);
 460         if (lc->vtable.show!=NULL)
 461                 lc->vtable.show(lc);
 462         if (lc->vtable.display_status!=NULL)
 463                 lc->vtable.display_status(lc,_("Call terminated."));
 464
 465         linphone_call_set_state(call, LinphoneCallEnd,"Call ended");
 466 }
 467
 468 static void call_failure(SalOp *op, SalError error, SalReason sr, const char *details, int code){
 469         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 470         char *msg486=_("User is busy.");
 471         char *msg480=_("User is temporarily unavailable.");
 472         /*char *retrymsg=_("%s. Retry after %i minute(s).");*/
 473         char *msg600=_("User does not want to be disturbed.");
 474         char *msg603=_("Call declined.");
 475         const char *msg=details;
 476         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 477
 478         if (call==NULL){
 479                 ms_warning("Call faillure reported on already cleaned call ?");
 480                 return ;
 481         }
 482
 483         if (lc->vtable.show) lc->vtable.show(lc);
 484
 485         if (error==SalErrorNoResponse){
 486                 msg=_("No response.");
 487                 if (lc->vtable.display_status)
 488                         lc->vtable.display_status(lc,msg);
 489         }else if (error==SalErrorProtocol){
 490                 msg=details ? details : _("Protocol error.");
 491                 if (lc->vtable.display_status)
 492                         lc->vtable.display_status(lc, msg);
 493         }else if (error==SalErrorFailure){
 494                 switch(sr){
 495                         case SalReasonDeclined:
 496                                 msg=msg603;
 497                                 if (lc->vtable.display_status)
 498                                         lc->vtable.display_status(lc,msg603);
 499                         break;
 500                         case SalReasonBusy:
 501                                 msg=msg486;
 502                                 if (lc->vtable.display_status)
 503                                         lc->vtable.display_status(lc,msg486);
 504                         break;
 505                         case SalReasonRedirect:
 506                                 msg=_("Redirected");
 507                                 if (lc->vtable.display_status)
 508                                         lc->vtable.display_status(lc,msg);
 509                         break;
 510                         case SalReasonTemporarilyUnavailable:
 511                                 msg=msg480;
 512                                 if (lc->vtable.display_status)
 513                                         lc->vtable.display_status(lc,msg480);
 514                         break;
 515                         case SalReasonNotFound:
 516                                 if (lc->vtable.display_status)
 517                                         lc->vtable.display_status(lc,msg);
 518                         break;
 519                         case SalReasonDoNotDisturb:
 520                                 msg=msg600;
 521                                 if (lc->vtable.display_status)
 522                                         lc->vtable.display_status(lc,msg600);
 523                         break;
 524                         case SalReasonMedia:
 525                         //media_encryption_mandatory
 526                                 if (call->params.media_encryption == LinphoneMediaEncryptionSRTP &&
 527                                         !linphone_core_is_media_encryption_mandatory(lc)) {
 528                                         int i;
 529                                         ms_message("Outgoing call failed with SRTP (SAVP) enabled - retrying with AVP");
 530                                         linphone_call_stop_media_streams(call);
 531                                         if (call->state==LinphoneCallOutgoingInit || call->state==LinphoneCallOutgoingProgress){
 532                                                 /* clear SRTP local params */
 533                                                 call->params.media_encryption = LinphoneMediaEncryptionNone;
 534                                                 for(i=0; i<call->localdesc->nstreams; i++) {
 535                                                         call->localdesc->streams[i].proto = SalProtoRtpAvp;
 536                                                         memset(call->localdesc->streams[i].crypto, 0, sizeof(call->localdesc->streams[i].crypto));
 537                                                 }
 538                                                 linphone_core_start_invite(lc, call, NULL);
 539                                         }
 540                                         return;
 541                                 }
 542                                 msg=_("Incompatible media parameters.");
 543                                 if (lc->vtable.display_status)
 544                                         lc->vtable.display_status(lc,msg);
 545                         break;
 546                         default:
 547                                 if (lc->vtable.display_status)
 548                                         lc->vtable.display_status(lc,_("Call failed."));
 549                 }
 550         }
 551
 552         if (lc->ringstream!=NULL) {
 553                 ring_stop(lc->ringstream);
 554                 lc->ringstream=NULL;
 555         }
 556         linphone_call_stop_media_streams (call);
 557         if (call->referer && linphone_call_get_state(call->referer)==LinphoneCallPaused && call->referer->was_automatically_paused){
 558                 /*resume to the call that send us the refer automatically*/
 559                 linphone_core_resume_call(lc,call->referer);
 560         }
 561         if (sr == SalReasonDeclined) {
 562                 call->reason=LinphoneReasonDeclined;
 563                 linphone_call_set_state(call,LinphoneCallEnd,"Call declined.");
 564         } else if (sr == SalReasonNotFound) {
 565                 call->reason=LinphoneReasonNotFound;
 566                 linphone_call_set_state(call,LinphoneCallError,"User not found.");
 567         } else {
 568                 linphone_call_set_state(call,LinphoneCallError,msg);
 569         }
 570 }
 571
 572 static void call_released(SalOp *op){
 573         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 574         if (call!=NULL){
 575                 linphone_call_set_state(call,LinphoneCallReleased,"Call released");
 576         }else ms_error("call_released() for already destroyed call ?");
 577 }
 578
 579 static void auth_requested(SalOp *h, const char *realm, const char *username){
 580         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(h));
 581         LinphoneAuthInfo *ai=(LinphoneAuthInfo*)linphone_core_find_auth_info(lc,realm,username);
 582         LinphoneCall *call=is_a_linphone_call(sal_op_get_user_pointer(h));
 583
 584         if (call && call->ping_op==h){
 585                 /*don't request authentication for ping requests. Their purpose is just to get any
 586                  * answer to get the Via's received and rport parameters.
 587                  */
 588                 ms_message("auth_requested(): ignored for ping request.");
 589                 return;
 590         }
 591
 592         ms_message("auth_requested() for realm=%s, username=%s",realm,username);
 593
 594         if (ai && ai->works==FALSE && ai->usecount>=3){
 595                 /*case we tried 3 times to authenticate, without success */
 596                 /*Better is to stop (implemeted below in else statement), and retry later*/
 597                 if (ms_time(NULL)-ai->last_use_time>30){
 598                         ai->usecount=0; /*so that we can allow to retry */
 599                 }
 600         }
 601
 602         if (ai && (ai->works || ai->usecount<3)){
 603                 SalAuthInfo sai;
 604                 sai.username=ai->username;
 605                 sai.userid=ai->userid;
 606                 sai.realm=ai->realm;
 607                 sai.password=ai->passwd;
 608                 ms_message("auth_requested(): authenticating realm=%s, username=%s",realm,username);
 609                 sal_op_authenticate(h,&sai);
 610                 ai->usecount++;
 611                 ai->last_use_time=ms_time(NULL);
 612         }else{
 613                 if (ai && ai->works==FALSE) {
 614                         sal_op_cancel_authentication(h);
 615                 }
 616                 if (lc->vtable.auth_info_requested)
 617                         lc->vtable.auth_info_requested(lc,realm,username);
 618         }
 619 }
 620
 621 static void auth_success(SalOp *h, const char *realm, const char *username){
 622         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(h));
 623         LinphoneAuthInfo *ai=(LinphoneAuthInfo*)linphone_core_find_auth_info(lc,realm,username);
 624         if (ai){
 625                 ms_message("%s/%s authentication works.",realm,username);
 626                 ai->works=TRUE;
 627         }
 628 }
 629
 630 static void register_success(SalOp *op, bool_t registered){
 631         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 632         LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)sal_op_get_user_pointer(op);
 633         char *msg;
 634
 635         if (cfg->deletion_date!=0){
 636                 ms_message("Registration success for removed proxy config, ignored");
 637                 return;
 638         }
 639         linphone_proxy_config_set_error(cfg,LinphoneReasonNone);
 640         linphone_proxy_config_set_state(cfg, registered ? LinphoneRegistrationOk : LinphoneRegistrationCleared ,
 641                                         registered ? "Registration sucessful" : "Unregistration done");
 642         if (lc->vtable.display_status){
 643                 if (registered) msg=ms_strdup_printf(_("Registration on %s successful."),sal_op_get_proxy(op));
 644                 else msg=ms_strdup_printf(_("Unregistration on %s done."),sal_op_get_proxy(op));
 645                 lc->vtable.display_status(lc,msg);
 646                 ms_free(msg);
 647         }
 648
 649 }
 650
 651 static void register_failure(SalOp *op, SalError error, SalReason reason, const char *details){
 652         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 653         LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)sal_op_get_user_pointer(op);
 654
 655         if (cfg==NULL){
 656                 ms_warning("Registration failed for unknown proxy config.");
 657                 return ;
 658         }
 659         if (cfg->deletion_date!=0){
 660                 ms_message("Registration failed for removed proxy config, ignored");
 661                 return;
 662         }
 663         if (details==NULL)
 664                 details=_("no response timeout");
 665
 666         if (lc->vtable.display_status) {
 667                 char *msg=ortp_strdup_printf(_("Registration on %s failed: %s"),sal_op_get_proxy(op),details  );
 668                 lc->vtable.display_status(lc,msg);
 669                 ms_free(msg);
 670         }
 671         if (error== SalErrorFailure && reason == SalReasonForbidden) {
 672                 linphone_proxy_config_set_error(cfg, LinphoneReasonBadCredentials);
 673         } else if (error == SalErrorNoResponse) {
 674                 linphone_proxy_config_set_error(cfg, LinphoneReasonNoResponse);
 675         }
 676         linphone_proxy_config_set_state(cfg,LinphoneRegistrationFailed,details);
 677         if (error== SalErrorFailure && reason == SalReasonForbidden) {
 678                 const char *realm=NULL,*username=NULL;
 679                 if (sal_op_get_auth_requested(op,&realm,&username)==0){
 680                         if (lc->vtable.auth_info_requested)
 681                                 lc->vtable.auth_info_requested(lc,realm,username);
 682                 }
 683         }
 684 }
 685
 686 static void vfu_request(SalOp *op){
 687 #ifdef VIDEO_ENABLED
 688         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer (op);
 689         if (call==NULL){
 690                 ms_warning("VFU request but no call !");
 691                 return ;
 692         }
 693         if (call->videostream)
 694                 video_stream_send_vfu(call->videostream);
 695 #endif
 696 }
 697
 698 static void dtmf_received(SalOp *op, char dtmf){
 699         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 700         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 701         if (lc->vtable.dtmf_received != NULL)
 702                 lc->vtable.dtmf_received(lc, call, dtmf);
 703 }
 704
 705 static void refer_received(Sal *sal, SalOp *op, const char *referto){
 706         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal);
 707         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer(op);
 708         if (call){
 709                 if (call->refer_to!=NULL){
 710                         ms_free(call->refer_to);
 711                 }
 712                 call->refer_to=ms_strdup(referto);
 713                 call->refer_pending=TRUE;
 714                 linphone_call_set_state(call,LinphoneCallRefered,"Refered");
 715                 if (lc->vtable.display_status){
 716                         char *msg=ms_strdup_printf(_("We are transferred to %s"),referto);
 717                         lc->vtable.display_status(lc,msg);
 718                         ms_free(msg);
 719                 }
 720                 if (call->state!=LinphoneCallPaused){
 721                         ms_message("Automatically pausing current call to accept transfer.");
 722                         linphone_core_pause_call(lc,call);
 723                         call->was_automatically_paused=TRUE;
 724                         /*then we will start the refered when the pause is accepted, in order to serialize transactions within the dialog.
 725                          * Indeed we need to avoid to send a NOTIFY to inform about of state of the refered call while the pause isn't completed.
 726                         **/
 727                 }else linphone_core_start_refered_call(lc,call);
 728         }else if (lc->vtable.refer_received){
 729                 lc->vtable.refer_received(lc,referto);
 730         }
 731 }
 732
 733 static void text_received(Sal *sal, const char *from, const char *msg){
 734         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal);
 735         linphone_core_message_received(lc,from,msg,NULL);
 736 }
 737 void message_external_body_received(Sal *sal, const char *from, const char *url) {
 738         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal);
 739         linphone_core_message_received(lc,from,NULL,url);
 740 }
 741 static void notify(SalOp *op, const char *from, const char *msg){
 742         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 743         LinphoneCall *call=(LinphoneCall*)sal_op_get_user_pointer (op);
 744         ms_message("get a %s notify from %s",msg,from);
 745         if(lc->vtable.notify_recv)
 746                 lc->vtable.notify_recv(lc,call,from,msg);
 747 }
 748
 749 static void notify_presence(SalOp *op, SalSubscribeStatus ss, SalPresenceStatus status, const char *msg){
 750         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 751         linphone_notify_recv(lc,op,ss,status);
 752 }
 753
 754 static void subscribe_received(SalOp *op, const char *from){
 755         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 756         linphone_subscription_new(lc,op,from);
 757 }
 758
 759 static void subscribe_closed(SalOp *op, const char *from){
 760         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 761         linphone_subscription_closed(lc,op);
 762 }
 763
 764 static void ping_reply(SalOp *op){
 765         LinphoneCall *call=(LinphoneCall*) sal_op_get_user_pointer(op);
 766         ms_message("ping reply !");
 767         if (call){
 768                 if (call->state==LinphoneCallOutgoingInit){
 769                         call->ping_replied=TRUE;
 770                         linphone_core_proceed_with_invite_if_ready(call->core,call,NULL);
 771                 }
 772         }
 773         else
 774         {
 775                 ms_warning("ping reply without call attached...");
 776         }
 777 }
 778
 779 static void notify_refer(SalOp *op, SalReferStatus status){
 780         LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 781         LinphoneCall *call=(LinphoneCall*) sal_op_get_user_pointer(op);
 782         LinphoneCallState cstate;
 783         if (call==NULL) {
 784                 ms_warning("Receiving notify_refer for unknown call.");
 785                 return ;
 786         }
 787         switch(status){
 788                 case SalReferTrying:
 789                         cstate=LinphoneCallOutgoingProgress;
 790                 break;
 791                 case SalReferSuccess:
 792                         cstate=LinphoneCallConnected;
 793                 break;
 794                 case SalReferFailed:
 795                         cstate=LinphoneCallError;
 796                 break;
 797                 default:
 798                         cstate=LinphoneCallError;
 799         }
 800         linphone_call_set_transfer_state(call, cstate);
 801         if (cstate==LinphoneCallConnected){
 802                 /*automatically terminate the call as the transfer is complete.*/
 803                 linphone_core_terminate_call(lc,call);
 804         }
 805 }
 806
 807 static LinphoneChatMessageState chatStatusSal2Linphone(SalTextDeliveryStatus status){
 808         switch(status){
 809                 case SalTextDeliveryInProgress:
 810                         return LinphoneChatMessageStateInProgress;
 811                 case SalTextDeliveryDone:
 812                         return LinphoneChatMessageStateDelivered;
 813                 case SalTextDeliveryFailed:
 814                         return LinphoneChatMessageStateNotDelivered;
 815         }
 816         return LinphoneChatMessageStateIdle;
 817 }
 818
 819 static void text_delivery_update(SalOp *op, SalTextDeliveryStatus status){
 820         LinphoneChatMessage *chat_msg=(LinphoneChatMessage* )sal_op_get_user_pointer(op);
 821         if (chat_msg && chat_msg->cb) {
 822                 chat_msg->cb(chat_msg
 823                         ,chatStatusSal2Linphone(status)
 824                         ,chat_msg->cb_ud);
 825         }
 826         linphone_chat_message_destroy(chat_msg);
 827 }
 828
 829 SalCallbacks linphone_sal_callbacks={
 830         call_received,
 831         call_ringing,
 832         call_accepted,
 833         call_ack,
 834         call_updating,
 835         call_terminated,
 836         call_failure,
 837         call_released,
 838         auth_requested,
 839         auth_success,
 840         register_success,
 841         register_failure,
 842         vfu_request,
 843         dtmf_received,
 844         refer_received,
 845         text_received,
 846         message_external_body_received,
 847         text_delivery_update,
 848         notify,
 849         notify_presence,
 850         notify_refer,
 851         subscribe_received,
 852         subscribe_closed,
 853         ping_reply,
 854 };
 855
 856