void AmSessionContainer::startSessionUAS(AmSipRequest& req)
{
  as_mut.lock();
  try {
	
    AmSession* session = getSession(req.callid,req.from_tag);
    if( session ){
	    
      // it's a forked-and-merged INVITE
      // reply 482 Loop detected
      throw AmSession::Exception(482, "Loop detected");
    }
    else {
      // Call-ID and From-Tag are unknown: it's a new session
      AmSession* session;
      if((session = createSession(req)) != 0){

	// update session's local tag (ID) if not already set
	session->setLocalTag();
	const string& local_tag = session->getLocalTag();
	// by default each session is in its own callgroup
	session->setCallgroup(local_tag);

	if (AmConfig::LogSessions) {
	  INFO("Starting UAS session %s app %s\n",
	       session->getLocalTag().c_str(), req.cmd.c_str());
	}

	session->start();

	addSession_unsafe(req.callid,req.from_tag,local_tag,session);
	session->postEvent(new AmSipRequestEvent(req));
      }
    }
  } 
  catch(const AmSession::Exception& e){
    ERROR("%i %s\n",e.code,e.reason.c_str());
    AmSipDialog::reply_error(req,e.code,e.reason);
  }
  catch(const string& err){
    ERROR("startSession: %s\n",err.c_str());
    AmSipDialog::reply_error(req,500,err);
  }
  catch(...){
    ERROR("unexpected exception\n");
    AmSipDialog::reply_error(req,500,"unexpected exception");
  }
  as_mut.unlock();
}
void AmSessionContainer::startSessionUAS(AmSipRequest& req)
{
  as_mut.lock();
  try {
	
    AmSession* session = getSession(req.callid,req.from_tag);
    if( session ){
	    
      // it's a forked-and-merged INVITE
      // reply 482 Loop detected
      throw AmSession::Exception(482, "Loop detected");
    }
    else {
      // Call-ID and From-Tag are unknown: it's a new session
      AmSession* session;
      if((session = createSession(req)) != 0){

	string local_tag = AmSession::getNewId();
	session->setLocalTag(local_tag);
	session->setCallgroup(local_tag);
	session->start();

	addSession_unsafe(req.callid,req.from_tag,local_tag,session);
	session->postEvent(new AmSipRequestEvent(req));
      }
      //else
      //throw AmSession::Exception(500,"internal error");
    }
  } 
  //     catch(const AmSession::SessionTimerException& e){
  //  	ERROR("%i %s\n",e.code,e.reason.c_str());
  // 	AmSipDialog::reply_error(req,e.code,e.reason,e.getErrorHeaders());
  //     }
  catch(const AmSession::Exception& e){
    ERROR("%i %s\n",e.code,e.reason.c_str());
    AmSipDialog::reply_error(req,e.code,e.reason);
  }
  catch(const string& err){
    ERROR("startSession: %s\n",err.c_str());
    AmSipDialog::reply_error(req,500,err);
  }
  catch(...){
    ERROR("unexpected exception\n");
    AmSipDialog::reply_error(req,500,"unexpected exception");
  }
  as_mut.unlock();
}