814 lines
23 KiB
C++
814 lines
23 KiB
C++
/**
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* session.cpp
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* SDP media handling
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004-2009 Null Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <yatesdp.h>
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namespace TelEngine {
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/*
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* SDPSession
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*/
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SDPSession::SDPSession(SDPParser* parser)
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: m_parser(parser), m_mediaStatus(MediaMissing),
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m_rtpForward(false), m_sdpForward(false), m_rtpMedia(0),
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m_sdpSession(0), m_sdpVersion(0),
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m_secure(m_parser->m_secure), m_rfc2833(m_parser->m_rfc2833)
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{
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}
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SDPSession::SDPSession(SDPParser* parser, NamedList& params)
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: m_parser(parser), m_mediaStatus(MediaMissing),
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m_rtpForward(false), m_sdpForward(false), m_rtpMedia(0),
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m_sdpSession(0), m_sdpVersion(0)
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{
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m_rtpForward = params.getBoolValue("rtp_forward");
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m_secure = params.getBoolValue("secure",parser->m_secure);
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m_rfc2833 = parser->m_rfc2833;
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setRfc2833(params.getParam("rfc2833"));
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}
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SDPSession::~SDPSession()
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{
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resetSdp();
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}
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// Set new media list. Return true if changed
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bool SDPSession::setMedia(ObjList* media)
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{
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if (media == m_rtpMedia)
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return false;
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DDebug(m_parser,DebugAll,"SDPSession::setMedia(%p) [%p]",media,this);
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ObjList* tmp = m_rtpMedia;
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m_rtpMedia = media;
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bool chg = m_rtpMedia != 0;
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if (tmp) {
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chg = false;
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for (ObjList* o = tmp->skipNull(); o; o = o->skipNext()) {
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SDPMedia* m = static_cast<SDPMedia*>(o->get());
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if (media && m->sameAs(static_cast<SDPMedia*>((*media)[*m]),m_parser->ignorePort()))
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continue;
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chg = true;
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mediaChanged(*m);
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}
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TelEngine::destruct(tmp);
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}
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return chg;
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}
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// Put the list of net media in a parameter list
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void SDPSession::putMedia(NamedList& msg, ObjList* mList, bool putPort)
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{
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if (!mList)
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return;
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bool audio = false;
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bool other = false;
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for (mList = mList->skipNull(); mList; mList = mList->skipNext()) {
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SDPMedia* m = static_cast<SDPMedia*>(mList->get());
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m->putMedia(msg,putPort);
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if (m->isAudio())
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audio = true;
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else
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other = true;
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}
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if (other && !audio)
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msg.setParam("media",String::boolText(false));
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}
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// Update the RFC 2833 availability and payload
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void SDPSession::setRfc2833(const String& value)
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{
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if (value.toBoolean(true)) {
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m_rfc2833 = value.toInteger(m_parser->m_rfc2833);
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if (m_rfc2833 < 96 || m_rfc2833 > 127)
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m_rfc2833 = value.toBoolean(false) ? 101 : m_parser->m_rfc2833;
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}
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else
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m_rfc2833 = -1;
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}
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// Build and dispatch a chan.rtp message for a given media. Update media on success
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bool SDPSession::dispatchRtp(SDPMedia* media, const char* addr, bool start,
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bool pick, RefObject* context)
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{
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DDebug(m_parser,DebugAll,"SDPSession::dispatchRtp(%p,%s,%u,%u,%p) [%p]",
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media,addr,start,pick,context,this);
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Message* m = buildChanRtp(media,addr,start,context);
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if (!(m && Engine::dispatch(m))) {
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TelEngine::destruct(m);
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return false;
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}
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media->update(*m,start);
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if (!pick) {
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TelEngine::destruct(m);
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return true;
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}
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m_rtpForward = false;
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m_rtpLocalAddr = m->getValue("localip",m_rtpLocalAddr);
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m_mediaStatus = m_rtpLocalAddr.null() ? MediaMuted : MediaStarted;
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const char* sdpPrefix = m->getValue("osdp-prefix","osdp");
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if (sdpPrefix) {
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unsigned int n = m->length();
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for (unsigned int j = 0; j < n; j++) {
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const NamedString* param = m->getParam(j);
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if (!param)
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continue;
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String tmp = param->name();
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if (tmp.startSkip(sdpPrefix,false) && tmp.startSkip("_",false) && tmp)
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media->parameter(tmp,*param,false);
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}
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}
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if (m_secure) {
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int tag = m->getIntValue("crypto_tag",1);
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tag = m->getIntValue("ocrypto_tag",tag);
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const String* suite = m->getParam("ocrypto_suite");
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const String* key = m->getParam("ocrypto_key");
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const String* params = m->getParam("ocrypto_params");
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if (suite && key && (tag > 0)) {
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String sdes(tag);
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sdes << " " << *suite << " " << *key;
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if (params)
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sdes << " " << *params;
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media->crypto(sdes,false);
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}
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}
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TelEngine::destruct(m);
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return true;
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}
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// Repeatedly calls dispatchRtp() for each media in the list
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// Update it on success. Remove it on failure
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bool SDPSession::dispatchRtp(const char* addr, bool start, RefObject* context)
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{
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if (!m_rtpMedia)
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return false;
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DDebug(m_parser,DebugAll,"SDPSession::dispatchRtp(%s,%u,%p) [%p]",
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addr,start,context,this);
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bool ok = false;
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ObjList* o = m_rtpMedia->skipNull();
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while (o) {
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SDPMedia* m = static_cast<SDPMedia*>(o->get());
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if (dispatchRtp(m,addr,start,true,context)) {
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ok = true;
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o = o->skipNext();
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}
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else {
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Debug(m_parser,DebugMild,
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"Removing failed SDP media '%s' format '%s' from offer [%p]",
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m->c_str(),m->format().safe(),this);
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o->remove();
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o = o->skipNull();
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}
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}
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return ok;
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}
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// Try to start RTP for all media
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bool SDPSession::startRtp(RefObject* context)
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{
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if (m_rtpForward || !m_rtpMedia || (m_mediaStatus != MediaStarted))
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return false;
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DDebug(m_parser,DebugAll,"SDPSession::startRtp(%p) [%p]",context,this);
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bool ok = false;
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for (ObjList* o = m_rtpMedia->skipNull(); o; o = o->skipNext()) {
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SDPMedia* m = static_cast<SDPMedia*>(o->get());
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ok = dispatchRtp(m,m_rtpAddr,true,false,context) || ok;
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}
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return ok;
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}
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// Update from parameters. Build a default SDP if no media is found in params
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bool SDPSession::updateSDP(const NamedList& params)
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{
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DDebug(m_parser,DebugAll,"SDPSession::updateSdp('%s') [%p]",params.c_str(),this);
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bool defaults = true;
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const char* sdpPrefix = params.getValue("osdp-prefix","osdp");
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ObjList* lst = 0;
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unsigned int n = params.length();
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String defFormats;
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m_parser->getAudioFormats(defFormats);
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for (unsigned int i = 0; i < n; i++) {
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const NamedString* p = params.getParam(i);
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if (!p)
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continue;
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// search for rtp_port or rtp_port_MEDIANAME parameters
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String tmp(p->name());
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if (!tmp.startSkip("media",false))
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continue;
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if (tmp && (tmp[0] != '_'))
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continue;
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// since we found at least one media declaration disable defaults
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defaults = false;
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// now tmp holds the suffix for the media, null for audio
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bool audio = tmp.null();
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// check if media is supported, default only for audio
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if (!p->toBoolean(audio))
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continue;
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String fmts = params.getValue("formats" + tmp);
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if (audio && fmts.null())
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fmts = defFormats;
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if (fmts.null())
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continue;
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String trans = params.getValue("transport" + tmp,"RTP/AVP");
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String crypto;
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if (m_secure)
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crypto = params.getValue("crypto" + tmp);
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if (audio)
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tmp = "audio";
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else
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tmp >> "_";
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SDPMedia* rtp = 0;
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// try to take the media descriptor from the old list
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if (m_rtpMedia) {
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ObjList* om = m_rtpMedia->find(tmp);
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if (om)
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rtp = static_cast<SDPMedia*>(om->remove(false));
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}
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bool append = false;
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if (rtp)
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rtp->update(fmts);
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else {
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rtp = new SDPMedia(tmp,trans,fmts);
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append = true;
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}
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rtp->crypto(crypto,false);
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if (sdpPrefix) {
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for (unsigned int j = 0; j < n; j++) {
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const NamedString* param = params.getParam(j);
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if (!param)
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continue;
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tmp = param->name();
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if (tmp.startSkip(sdpPrefix + rtp->suffix() + "_",false) && (tmp.find('_') < 0))
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rtp->parameter(tmp,*param,append);
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}
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}
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if (!lst)
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lst = new ObjList;
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lst->append(rtp);
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}
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if (defaults && !lst) {
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lst = new ObjList;
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lst->append(new SDPMedia("audio","RTP/AVP",params.getValue("formats",defFormats)));
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}
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return setMedia(lst);
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}
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// Update RTP/SDP data from parameters
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// Return true if media changed
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bool SDPSession::updateRtpSDP(const NamedList& params)
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{
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DDebug(m_parser,DebugAll,"SDPSession::updateRtpSDP(%s) [%p]",params.c_str(),this);
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String addr;
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ObjList* tmp = updateRtpSDP(params,addr,m_rtpMedia);
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if (tmp) {
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bool chg = (m_rtpLocalAddr != addr);
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m_rtpLocalAddr = addr;
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return setMedia(tmp) || chg;
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}
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return false;
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}
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// Creates a SDP body from transport address and list of media descriptors
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// Use own list if given media list is 0
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MimeSdpBody* SDPSession::createSDP(const char* addr, ObjList* mediaList)
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{
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DDebug(m_parser,DebugAll,"SDPSession::createSDP('%s',%p) [%p]",addr,mediaList,this);
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if (!mediaList)
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mediaList = m_rtpMedia;
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// if we got no media descriptors we simply create no SDP
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if (!mediaList)
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return 0;
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if (m_sdpSession)
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++m_sdpVersion;
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else
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m_sdpVersion = m_sdpSession = Time::secNow();
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// no address means on hold or muted
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String origin;
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origin << "yate " << m_sdpSession << " " << m_sdpVersion;
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origin << " IN IP4 " << (addr ? addr : m_host.safe());
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String conn;
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conn << "IN IP4 " << (addr ? addr : "0.0.0.0");
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MimeSdpBody* sdp = new MimeSdpBody;
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sdp->addLine("v","0");
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sdp->addLine("o",origin);
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sdp->addLine("s",m_parser->m_sessionName);
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sdp->addLine("c",conn);
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sdp->addLine("t","0 0");
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Lock lock(m_parser);
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bool defcodecs = m_parser->m_codecs.getBoolValue("default",true);
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for (ObjList* ml = mediaList->skipNull(); ml; ml = ml->skipNext()) {
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SDPMedia* m = static_cast<SDPMedia*>(ml->get());
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String mline(m->fmtList());
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ObjList* l = mline.split(',',false);
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mline = *m;
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mline << " " << (m->localPort() ? m->localPort().c_str() : "0") << " " << m->transport();
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ObjList* map = m->mappings().split(',',false);
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ObjList rtpmap;
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String frm;
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int ptime = 0;
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ObjList* f = l;
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for (; f; f = f->next()) {
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String* s = static_cast<String*>(f->get());
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if (s) {
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int mode = 0;
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if (*s == "ilbc20")
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ptime = mode = 20;
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else if (*s == "ilbc30")
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ptime = mode = 30;
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else if (*s == "g729b")
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continue;
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int payload = s->toInteger(SDPParser::s_payloads,-1);
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int defcode = payload;
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String tmp = *s;
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tmp << "=";
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for (ObjList* pl = map; pl; pl = pl->next()) {
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String* mapping = static_cast<String*>(pl->get());
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if (!mapping)
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continue;
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if (mapping->startsWith(tmp)) {
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payload = -1;
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tmp = *mapping;
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tmp >> "=" >> payload;
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XDebug(m_parser,DebugAll,"RTP mapped payload %d for '%s' [%p]",
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payload,s->c_str(),this);
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break;
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}
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}
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if (payload >= 0) {
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if (defcode < 0)
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defcode = payload;
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const char* map = lookup(defcode,SDPParser::s_rtpmap);
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if (map && m_parser->m_codecs.getBoolValue(*s,defcodecs && DataTranslator::canConvert(*s))) {
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frm << " " << payload;
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String* temp = new String("rtpmap:");
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*temp << payload << " " << map;
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rtpmap.append(temp);
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if (mode) {
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temp = new String("fmtp:");
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*temp << payload << " mode=" << mode;
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rtpmap.append(temp);
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}
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if (*s == "g729") {
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temp = new String("fmtp:");
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*temp << payload << " annexb=" <<
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((0 != l->find("g729b")) ? "yes" : "no");
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rtpmap.append(temp);
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}
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else if (*s == "amr") {
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temp = new String("fmtp:");
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*temp << payload << " octet-align=0";
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rtpmap.append(temp);
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}
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else if (*s == "amr-o") {
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temp = new String("fmtp:");
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*temp << payload << " octet-align=1";
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rtpmap.append(temp);
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}
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}
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}
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}
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}
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TelEngine::destruct(l);
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TelEngine::destruct(map);
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if ((m_rfc2833 >= 0) && frm && m->isAudio()) {
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int rfc2833 = m->rfc2833().toInteger(m_rfc2833);
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if (rfc2833 < 96 || rfc2833 > 127)
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rfc2833 = 101;
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// claim to support telephone events
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frm << " " << rfc2833;
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String* s = new String;
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*s << "rtpmap:" << rfc2833 << " telephone-event/8000";
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rtpmap.append(s);
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}
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if (frm.null()) {
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if (m->isAudio() || !m->fmtList()) {
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Debug(m_parser,DebugMild,"No formats for '%s', excluding from SDP [%p]",
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m->c_str(),this);
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continue;
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}
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Debug(m_parser,DebugInfo,"Assuming formats '%s' for media '%s' [%p]",
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m->fmtList(),m->c_str(),this);
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frm << " " << m->fmtList();
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// brutal but effective
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for (char* p = const_cast<char*>(frm.c_str()); *p; p++) {
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if (*p == ',')
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*p = ' ';
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}
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}
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if (ptime) {
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String* temp = new String("ptime:");
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*temp << ptime;
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rtpmap.append(temp);
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}
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sdp->addLine("m",mline + frm);
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bool enc = false;
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if (m->isModified()) {
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unsigned int n = m->length();
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for (unsigned int i = 0; i < n; i++) {
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const NamedString* param = m->getParam(i);
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if (param) {
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String tmp = param->name();
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if (*param)
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tmp << ":" << *param;
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sdp->addLine("a",tmp);
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enc = enc || (param->name() == "encryption");
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}
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}
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}
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for (f = rtpmap.skipNull(); f; f = f->skipNext()) {
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String* s = static_cast<String*>(f->get());
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if (s)
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sdp->addLine("a",*s);
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}
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if (addr && m->localCrypto()) {
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sdp->addLine("a","crypto:" + m->localCrypto());
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if (!enc)
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sdp->addLine("a","encryption:optional");
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}
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}
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return sdp;
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}
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// Creates a SDP body for the current media status
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MimeSdpBody* SDPSession::createSDP()
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{
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switch (m_mediaStatus) {
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case MediaStarted:
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return createSDP(getRtpAddr());
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case MediaMuted:
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return createSDP(0);
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default:
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return 0;
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}
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}
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// Creates a SDP from RTP address data present in message
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MimeSdpBody* SDPSession::createPasstroughSDP(NamedList& msg, bool update)
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{
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String tmp = msg.getValue("rtp_forward");
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msg.clearParam("rtp_forward");
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if (!(m_rtpForward && tmp.toBoolean()))
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return 0;
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String* raw = msg.getParam("sdp_raw");
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if (raw) {
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m_sdpForward = m_sdpForward || m_parser->sdpForward();
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if (m_sdpForward) {
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msg.setParam("rtp_forward","accepted");
|
|
return new MimeSdpBody("application/sdp",raw->safe(),raw->length());
|
|
}
|
|
}
|
|
String addr;
|
|
ObjList* lst = updateRtpSDP(msg,addr,update ? m_rtpMedia : 0);
|
|
if (!lst)
|
|
return 0;
|
|
MimeSdpBody* sdp = createSDP(addr,lst);
|
|
if (update) {
|
|
m_rtpLocalAddr = addr;
|
|
setMedia(lst);
|
|
}
|
|
else
|
|
TelEngine::destruct(lst);
|
|
if (sdp)
|
|
msg.setParam("rtp_forward","accepted");
|
|
return sdp;
|
|
}
|
|
|
|
// Update media format lists from parameters
|
|
void SDPSession::updateFormats(const NamedList& msg, bool changeMedia)
|
|
{
|
|
if (!m_rtpMedia)
|
|
return;
|
|
unsigned int n = msg.length();
|
|
unsigned int i;
|
|
if (changeMedia) {
|
|
// check if any media is to be removed
|
|
for (i = 0; i < n; i++) {
|
|
const NamedString* p = msg.getParam(i);
|
|
if (!p)
|
|
continue;
|
|
// search for media_MEDIANAME parameters
|
|
String tmp = p->name();
|
|
if (!tmp.startSkip("media",false))
|
|
continue;
|
|
if (tmp && (tmp[0] != '_'))
|
|
continue;
|
|
// only check for explicit disabled media
|
|
if (p->toBoolean(true))
|
|
continue;
|
|
if (tmp.null())
|
|
tmp = "audio";
|
|
else
|
|
tmp = tmp.substr(1);
|
|
SDPMedia* rtp = static_cast<SDPMedia*>(m_rtpMedia->operator[](tmp));
|
|
if (!rtp)
|
|
continue;
|
|
Debug(m_parser,DebugNote,"Removing disabled media '%s' [%p]",
|
|
tmp.c_str(),this);
|
|
m_rtpMedia->remove(rtp,false);
|
|
mediaChanged(*rtp);
|
|
TelEngine::destruct(rtp);
|
|
}
|
|
}
|
|
for (i = 0; i < n; i++) {
|
|
const NamedString* p = msg.getParam(i);
|
|
if (!p)
|
|
continue;
|
|
// search for formats_MEDIANAME parameters
|
|
String tmp = p->name();
|
|
if (!tmp.startSkip("formats",false))
|
|
continue;
|
|
if (tmp && (tmp[0] != '_'))
|
|
continue;
|
|
const char* trans = 0;
|
|
// make sure we don't re-add explicitely disabled media
|
|
if (changeMedia && msg.getBoolValue("media"+tmp,true))
|
|
trans = msg.getValue("transport"+tmp);
|
|
if (tmp.null())
|
|
tmp = "audio";
|
|
else
|
|
tmp = tmp.substr(1);
|
|
SDPMedia* rtp = static_cast<SDPMedia*>(m_rtpMedia->operator[](tmp));
|
|
if (rtp) {
|
|
if (rtp->update(*p))
|
|
Debug(m_parser,DebugNote,"Formats for '%s' changed to '%s' [%p]",
|
|
tmp.c_str(),rtp->formats().c_str(),this);
|
|
}
|
|
else if (*p) {
|
|
Debug(m_parser,DebugNote,"Got formats '%s' for absent media '%s' [%p]",
|
|
p->c_str(),tmp.c_str(),this);
|
|
if (trans) {
|
|
rtp = new SDPMedia(tmp,trans,p->c_str());
|
|
m_rtpMedia->append(rtp);
|
|
mediaChanged(*rtp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Add raw SDP forwarding parameter
|
|
bool SDPSession::addSdpParams(NamedList& msg, const MimeBody* body)
|
|
{
|
|
if (!(m_sdpForward && body))
|
|
return false;
|
|
const MimeSdpBody* sdp =
|
|
static_cast<const MimeSdpBody*>(body->isSDP() ? body : body->getFirst("application/sdp"));
|
|
if (!sdp)
|
|
return false;
|
|
const DataBlock& raw = sdp->getBody();
|
|
String tmp((const char*)raw.data(),raw.length());
|
|
return addSdpParams(msg,tmp);
|
|
}
|
|
|
|
// Add raw SDP forwarding parameter
|
|
bool SDPSession::addSdpParams(NamedList& msg, const String& rawSdp)
|
|
{
|
|
if (!m_sdpForward)
|
|
return false;
|
|
msg.setParam("rtp_forward","yes");
|
|
msg.addParam("sdp_raw",rawSdp);
|
|
return true;
|
|
}
|
|
|
|
// Add RTP forwarding parameters to a message
|
|
bool SDPSession::addRtpParams(NamedList& msg, const String& natAddr,
|
|
const MimeBody* body, bool force)
|
|
{
|
|
if (!(m_rtpMedia && m_rtpAddr))
|
|
return false;
|
|
putMedia(msg,false);
|
|
if (force || (!startRtp() && m_rtpForward)) {
|
|
if (natAddr)
|
|
msg.addParam("rtp_nat_addr",natAddr);
|
|
msg.addParam("rtp_forward","yes");
|
|
msg.addParam("rtp_addr",m_rtpAddr);
|
|
for (ObjList* o = m_rtpMedia->skipNull(); o; o = o->skipNext()) {
|
|
SDPMedia* m = static_cast<SDPMedia*>(o->get());
|
|
msg.addParam("rtp_port" + m->suffix(),m->remotePort());
|
|
if (m->isAudio())
|
|
msg.addParam("rtp_rfc2833",m->rfc2833());
|
|
}
|
|
addSdpParams(msg,body);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Reset this object to default values
|
|
void SDPSession::resetSdp(bool all)
|
|
{
|
|
m_mediaStatus = MediaMissing;
|
|
TelEngine::destruct(m_rtpMedia);
|
|
m_rtpForward = false;
|
|
m_sdpForward = false;
|
|
m_externalAddr.clear();
|
|
m_rtpAddr.clear();
|
|
m_rtpLocalAddr.clear();
|
|
m_sdpSession = 0;
|
|
m_sdpVersion = 0;
|
|
m_host.clear();
|
|
if (all) {
|
|
m_secure = m_parser->secure();
|
|
m_rfc2833 = m_parser->rfc2833();
|
|
}
|
|
}
|
|
|
|
// Build a populated chan.rtp message
|
|
Message* SDPSession::buildChanRtp(SDPMedia* media, const char* addr, bool start, RefObject* context)
|
|
{
|
|
if (!(media && addr))
|
|
return 0;
|
|
Message* m = buildChanRtp(context);
|
|
if (!m)
|
|
return 0;
|
|
if (media->id())
|
|
m->addParam("rtpid",media->id());
|
|
m->addParam("media",*media);
|
|
m->addParam("transport",media->transport());
|
|
m->addParam("direction","bidir");
|
|
if (media->format())
|
|
m->addParam("format",media->format());
|
|
if (m_rtpLocalAddr)
|
|
m->addParam("localip",m_rtpLocalAddr);
|
|
m->addParam("remoteip",addr);
|
|
if (start) {
|
|
m->addParam("remoteport",media->remotePort());
|
|
String tmp = media->format();
|
|
tmp << "=";
|
|
ObjList* mappings = media->mappings().split(',',false);
|
|
for (ObjList* pl = mappings; pl; pl = pl->next()) {
|
|
String* mapping = static_cast<String*>(pl->get());
|
|
if (!mapping)
|
|
continue;
|
|
if (mapping->startsWith(tmp)) {
|
|
tmp = *mapping;
|
|
tmp >> "=";
|
|
m->addParam("payload",tmp);
|
|
break;
|
|
}
|
|
}
|
|
m->addParam("evpayload",media->rfc2833());
|
|
TelEngine::destruct(mappings);
|
|
}
|
|
if (m_secure) {
|
|
if (media->remoteCrypto()) {
|
|
String sdes = media->remoteCrypto();
|
|
static const Regexp r("^\\([0-9]\\+\\) \\+\\([^ ]\\+\\) \\+\\([^ ]\\+\\) *\\(.*\\)$");
|
|
if (sdes.matches(r)) {
|
|
m->addParam("secure",String::boolText(true));
|
|
m->addParam("crypto_tag",sdes.matchString(1));
|
|
m->addParam("crypto_suite",sdes.matchString(2));
|
|
m->addParam("crypto_key",sdes.matchString(3));
|
|
if (sdes.matchLength(4))
|
|
m->addParam("crypto_params",sdes.matchString(4));
|
|
}
|
|
else
|
|
Debug(m_parser,DebugWarn,"Invalid SDES: '%s' [%p]",sdes.c_str(),this);
|
|
}
|
|
else if (media->securable())
|
|
m->addParam("secure",String::boolText(true));
|
|
}
|
|
else
|
|
media->crypto(0,true);
|
|
unsigned int n = media->length();
|
|
for (unsigned int i = 0; i < n; i++) {
|
|
const NamedString* param = media->getParam(i);
|
|
if (!param)
|
|
continue;
|
|
m->addParam("sdp_" + param->name(),*param);
|
|
}
|
|
return m;
|
|
}
|
|
|
|
// Check if local RTP data changed for at least one media
|
|
bool SDPSession::localRtpChanged() const
|
|
{
|
|
if (!m_rtpMedia)
|
|
return false;
|
|
for (ObjList* o = m_rtpMedia->skipNull(); o; o = o->skipNext()) {
|
|
SDPMedia* m = static_cast<SDPMedia*>(o->get());
|
|
if (m->localChanged())
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Set or reset the local RTP data changed flag for all media
|
|
void SDPSession::setLocalRtpChanged(bool chg)
|
|
{
|
|
if (!m_rtpMedia)
|
|
return;
|
|
for (ObjList* o = m_rtpMedia->skipNull(); o; o = o->skipNext())
|
|
(static_cast<SDPMedia*>(o->get()))->setLocalChanged(chg);
|
|
}
|
|
|
|
// Update RTP/SDP data from parameters
|
|
ObjList* SDPSession::updateRtpSDP(const NamedList& params, String& rtpAddr, ObjList* oldList)
|
|
{
|
|
DDebug(DebugAll,"SDPSession::updateRtpSDP(%s,%s,%p)",params.c_str(),rtpAddr.c_str(),oldList);
|
|
rtpAddr = params.getValue("rtp_addr");
|
|
if (!rtpAddr)
|
|
return 0;
|
|
const char* sdpPrefix = params.getValue("osdp-prefix","osdp");
|
|
ObjList* lst = 0;
|
|
unsigned int n = params.length();
|
|
for (unsigned int i = 0; i < n; i++) {
|
|
const NamedString* p = params.getParam(i);
|
|
if (!p)
|
|
continue;
|
|
// search for rtp_port or rtp_port_MEDIANAME parameters
|
|
String tmp = p->name();
|
|
if (!tmp.startSkip("rtp_port",false))
|
|
continue;
|
|
if (tmp && (tmp[0] != '_'))
|
|
continue;
|
|
// now tmp holds the suffix for the media, null for audio
|
|
bool audio = tmp.null();
|
|
// check if media is supported, default only for audio
|
|
if (!params.getBoolValue("media" + tmp,audio))
|
|
continue;
|
|
int port = p->toInteger();
|
|
if (!port)
|
|
continue;
|
|
const char* fmts = params.getValue("formats" + tmp);
|
|
if (!fmts)
|
|
continue;
|
|
String trans = params.getValue("transport" + tmp,"RTP/AVP");
|
|
if (audio)
|
|
tmp = "audio";
|
|
else
|
|
tmp >> "_";
|
|
SDPMedia* rtp = 0;
|
|
// try to take the media descriptor from the old list
|
|
if (oldList) {
|
|
ObjList* om = oldList->find(tmp);
|
|
if (om)
|
|
rtp = static_cast<SDPMedia*>(om->remove(false));
|
|
}
|
|
bool append = false;
|
|
if (rtp)
|
|
rtp->update(fmts,-1,port);
|
|
else {
|
|
rtp = new SDPMedia(tmp,trans,fmts,-1,port);
|
|
append = true;
|
|
}
|
|
if (sdpPrefix) {
|
|
for (unsigned int j = 0; j < n; j++) {
|
|
const NamedString* param = params.getParam(j);
|
|
if (!param)
|
|
continue;
|
|
tmp = param->name();
|
|
if (tmp.startSkip(sdpPrefix + rtp->suffix() + "_",false) && (tmp.find('_') < 0))
|
|
rtp->parameter(tmp,*param,append);
|
|
}
|
|
}
|
|
rtp->mappings(params.getValue("rtp_mapping" + rtp->suffix()));
|
|
if (audio)
|
|
rtp->rfc2833(params.getIntValue("rtp_rfc2833",-1));
|
|
rtp->crypto(params.getValue("crypto" + rtp->suffix()),false);
|
|
if (!lst)
|
|
lst = new ObjList;
|
|
lst->append(rtp);
|
|
}
|
|
return lst;
|
|
}
|
|
|
|
// Media changed notification.
|
|
void SDPSession::mediaChanged(const SDPMedia& media)
|
|
{
|
|
XDebug(m_parser,DebugAll,"SDPSession::mediaChanged('%s' %p)%s%s [%p]",
|
|
media.c_str(),&media,(media.id() ? " id=" : ""),media.id().safe(),this);
|
|
}
|
|
|
|
}; // namespace TelEngine
|
|
|
|
/* vi: set ts=8 sw=4 sts=4 noet: */
|