bool_t linphone_core_is_payload_type_usable_for_bandwidth(LinphoneCore *lc, PayloadType *pt, int bandwidth_limit) { double codec_band; bool_t ret=FALSE; switch (pt->type){ case PAYLOAD_AUDIO_CONTINUOUS: case PAYLOAD_AUDIO_PACKETIZED: codec_band=get_audio_payload_bandwidth(lc,pt); ret=bandwidth_is_greater(bandwidth_limit*1000,codec_band); /*hack to avoid using uwb codecs when having low bitrate and video*/ if (bandwidth_is_greater(199,bandwidth_limit)){ if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){ ret=FALSE; } } //ms_message("Payload %s: %g",pt->mime_type,codec_band); break; case PAYLOAD_VIDEO: if (bandwidth_limit!=0) {/* infinite (-1) or strictly positive*/ ret=TRUE; } else ret=FALSE; break; } return ret; }
LinphoneCall * linphone_call_new_incoming(LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, SalOp *op){ LinphoneCall *call=ms_new0(LinphoneCall,1); char *from_str; call->dir=LinphoneCallIncoming; sal_op_set_user_pointer(op,call); call->op=op; call->core=lc; if (lc->sip_conf.ping_with_options){ /*the following sends an option request back to the caller so that we get a chance to discover our nat'd address before answering.*/ call->ping_op=sal_op_new(lc->sal); from_str=linphone_address_as_string(from); sal_op_set_route(call->ping_op,sal_op_get_network_origin(call->op)); sal_op_set_user_pointer(call->ping_op,call); sal_ping(call->ping_op,linphone_core_find_best_identity(lc,from,NULL),from_str); ms_free(from_str); } linphone_address_clean(from); linphone_core_get_local_ip(lc,linphone_address_get_domain(from),call->localip); linphone_call_init_common(call, from, to); call->params.has_video=linphone_core_video_enabled(lc); call->localdesc=create_local_media_description (lc,call); call->camera_active=call->params.has_video; if (linphone_core_get_firewall_policy(call->core)==LinphonePolicyUseStun) linphone_core_run_stun_tests(call->core,call); discover_mtu(lc,linphone_address_get_domain(from)); return call; }
/*this function makes a special case for speex/8000. This codec is variable bitrate. The 8kbit/s mode is interesting when having a low upload bandwidth, but its quality is not very good. We 'd better use its 15kbt/s mode when we have enough bandwidth*/ static int get_codec_bitrate(LinphoneCore *lc, const PayloadType *pt){ int upload_bw=linphone_core_get_upload_bandwidth(lc); if (bandwidth_is_greater(upload_bw,129) || (bandwidth_is_greater(upload_bw,33) && !linphone_core_video_enabled(lc)) ) { if (strcmp(pt->mime_type,"speex")==0 && pt->clock_rate==8000){ return 15000; } } return pt->normal_bitrate; }
/* return TRUE if codec can be used with bandwidth, FALSE else*/ bool_t linphone_core_check_payload_type_usability(LinphoneCore *lc, PayloadType *pt) { double codec_band; int allowed_bw,video_bw; bool_t ret=FALSE; linphone_core_update_allocated_audio_bandwidth(lc); allowed_bw=get_min_bandwidth(linphone_core_get_download_bandwidth(lc), linphone_core_get_upload_bandwidth(lc)); if (allowed_bw==0) { allowed_bw=-1; video_bw=1500; /*around 1.5 Mbit/s*/ }else video_bw=get_video_bandwidth(allowed_bw,lc->audio_bw); switch (pt->type){ case PAYLOAD_AUDIO_CONTINUOUS: case PAYLOAD_AUDIO_PACKETIZED: codec_band=get_audio_payload_bandwidth(lc,pt); ret=bandwidth_is_greater(allowed_bw*1000,codec_band); /*hack to avoid using uwb codecs when having low bitrate and video*/ if (bandwidth_is_greater(199,allowed_bw)){ if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){ ret=FALSE; } } //ms_message("Payload %s: %g",pt->mime_type,codec_band); break; case PAYLOAD_VIDEO: if (video_bw>0){ pt->normal_bitrate=video_bw*1000; ret=TRUE; } else ret=FALSE; break; } return ret; }
void linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){ const char *server=linphone_core_get_stun_server(lc); if (lc->sip_conf.ipv6_enabled){ ms_warning("stun support is not implemented for ipv6"); return; } if (server!=NULL){ struct sockaddr_storage ss; socklen_t ss_len; ortp_socket_t sock1=-1, sock2=-1; int loops=0; bool_t video_enabled=linphone_core_video_enabled(lc); bool_t got_audio,got_video; bool_t cone_audio=FALSE,cone_video=FALSE; struct timeval init,cur; SalEndpointCandidate *ac,*vc; ac=&call->localdesc->streams[0].candidates[0]; vc=&call->localdesc->streams[1].candidates[0]; if (parse_hostname_to_addr(server,&ss,&ss_len)<0){ ms_error("Fail to parser stun server address: %s",server); return; } if (lc->vtable.display_status!=NULL) lc->vtable.display_status(lc,_("Stun lookup in progress...")); /*create the two audio and video RTP sockets, and send STUN message to our stun server */ sock1=create_socket(call->audio_port); if (sock1==-1) return; if (video_enabled){ sock2=create_socket(call->video_port); if (sock2==-1) return ; } got_audio=FALSE; got_video=FALSE; gettimeofday(&init,NULL); do{ double elapsed; int id; if (loops%20==0){ ms_message("Sending stun requests..."); sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,11,TRUE); sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,1,FALSE); if (sock2!=-1){ sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,22,TRUE); sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,2,FALSE); } } #ifdef WIN32 Sleep(10); #else usleep(10000); #endif if (recvStunResponse(sock1,ac->addr, &ac->port,&id)>0){ ms_message("STUN test result: local audio port maps to %s:%i", ac->addr, ac->port); if (id==11) cone_audio=TRUE; got_audio=TRUE; } if (recvStunResponse(sock2,vc->addr, &vc->port,&id)>0){ ms_message("STUN test result: local video port maps to %s:%i", vc->addr, vc->port); if (id==22) cone_video=TRUE; got_video=TRUE; } gettimeofday(&cur,NULL); elapsed=((cur.tv_sec-init.tv_sec)*1000.0) + ((cur.tv_usec-init.tv_usec)/1000.0); if (elapsed>2000) { ms_message("Stun responses timeout, going ahead."); break; } loops++; }while(!(got_audio && (got_video||sock2==-1) ) ); if (!got_audio){ ms_error("No stun server response for audio port."); }else{ if (!cone_audio) { ms_message("NAT is symmetric for audio port"); } } if (sock2!=-1){ if (!got_video){ ms_error("No stun server response for video port."); }else{ if (!cone_video) { ms_message("NAT is symmetric for video port."); } } } if ((ac->addr[0]!='\0' && vc->addr[0]!='\0' && strcmp(ac->addr,vc->addr)==0) || sock2==-1){ strcpy(call->localdesc->addr,ac->addr); } close_socket(sock1); if (sock2!=-1) close_socket(sock2); } }
/* this functions runs a simple stun test and return the number of milliseconds to complete the tests, or -1 if the test were failed.*/ int linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){ const char *server=linphone_core_get_stun_server(lc); StunCandidate *ac=&call->ac; StunCandidate *vc=&call->vc; if (lc->sip_conf.ipv6_enabled){ ms_warning("stun support is not implemented for ipv6"); return -1; } if (server!=NULL){ const struct addrinfo *ai=linphone_core_get_stun_server_addrinfo(lc); ortp_socket_t sock1=-1, sock2=-1; int loops=0; bool_t video_enabled=linphone_core_video_enabled(lc); bool_t got_audio,got_video; bool_t cone_audio=FALSE,cone_video=FALSE; struct timeval init,cur; double elapsed; int ret=0; if (ai==NULL){ ms_error("Could not obtain stun server addrinfo."); return -1; } if (lc->vtable.display_status!=NULL) lc->vtable.display_status(lc,_("Stun lookup in progress...")); /*create the two audio and video RTP sockets, and send STUN message to our stun server */ sock1=create_socket(call->audio_port); if (sock1==-1) return -1; if (video_enabled){ sock2=create_socket(call->video_port); if (sock2==-1) return -1; } got_audio=FALSE; got_video=FALSE; ortp_gettimeofday(&init,NULL); do{ int id; if (loops%20==0){ ms_message("Sending stun requests..."); sendStunRequest(sock1,ai->ai_addr,ai->ai_addrlen,11,TRUE); sendStunRequest(sock1,ai->ai_addr,ai->ai_addrlen,1,FALSE); if (sock2!=-1){ sendStunRequest(sock2,ai->ai_addr,ai->ai_addrlen,22,TRUE); sendStunRequest(sock2,ai->ai_addr,ai->ai_addrlen,2,FALSE); } } ms_usleep(10000); if (recvStunResponse(sock1,ac->addr, &ac->port,&id)>0){ ms_message("STUN test result: local audio port maps to %s:%i", ac->addr, ac->port); if (id==11) cone_audio=TRUE; got_audio=TRUE; } if (recvStunResponse(sock2,vc->addr, &vc->port,&id)>0){ ms_message("STUN test result: local video port maps to %s:%i", vc->addr, vc->port); if (id==22) cone_video=TRUE; got_video=TRUE; } ortp_gettimeofday(&cur,NULL); elapsed=((cur.tv_sec-init.tv_sec)*1000.0) + ((cur.tv_usec-init.tv_usec)/1000.0); if (elapsed>2000) { ms_message("Stun responses timeout, going ahead."); ret=-1; break; } loops++; }while(!(got_audio && (got_video||sock2==-1) ) ); if (ret==0) ret=(int)elapsed; if (!got_audio){ ms_error("No stun server response for audio port."); }else{ if (!cone_audio) { ms_message("NAT is symmetric for audio port"); } } if (sock2!=-1){ if (!got_video){ ms_error("No stun server response for video port."); }else{ if (!cone_video) { ms_message("NAT is symmetric for video port."); } } } close_socket(sock1); if (sock2!=-1) close_socket(sock2); return ret; } return -1; }