static apt_bool_t mrcp_sofia_session_offer(mrcp_session_t *session, mrcp_session_descriptor_t *descriptor)
{
	char sdp_str[2048];
	char *local_sdp_str = NULL;
	mrcp_sofia_session_t *sofia_session = session->obj;
	if(!sofia_session || !sofia_session->nh) {
		return FALSE;
	}

	if(session->signaling_agent) {
		mrcp_sofia_agent_t *sofia_agent = session->signaling_agent->obj;
		if(sofia_agent && sofia_agent->config->origin) {
			apt_string_set(&descriptor->origin,sofia_agent->config->origin);
		}
	}
	if(sdp_string_generate_by_mrcp_descriptor(sdp_str,sizeof(sdp_str),descriptor,TRUE) > 0) {
		local_sdp_str = sdp_str;
		apt_log(APT_LOG_MARK,APT_PRIO_INFO,"Local SDP\n%s", local_sdp_str);
	}

	nua_invite(sofia_session->nh,
			   TAG_IF(local_sdp_str,SOATAG_USER_SDP_STR(local_sdp_str)),
			   TAG_END());

	return TRUE;
}
static apt_bool_t mrcp_sofia_on_session_answer(mrcp_session_t *session, mrcp_session_descriptor_t *descriptor)
{
	mrcp_sofia_session_t *sofia_session = session->obj;
	mrcp_sofia_agent_t *sofia_agent = session->signaling_agent->obj;
	const char *local_sdp_str = NULL;
	char sdp_str[2048];

	if(!sofia_agent || !sofia_session || !sofia_session->nh) {
		return FALSE;
	}

	if(sofia_agent->config->origin) {
		apt_string_set(&descriptor->origin,sofia_agent->config->origin);
	}

	if(sdp_string_generate_by_mrcp_descriptor(sdp_str,sizeof(sdp_str),descriptor,FALSE) > 0) {
		local_sdp_str = sdp_str;
		apt_log(APT_LOG_MARK,APT_PRIO_INFO,"Local SDP\n%s", local_sdp_str);
	}

	nua_respond(sofia_session->nh, SIP_200_OK, 
				SIPTAG_CONTACT_STR(sofia_agent->sip_contact_str),
				TAG_IF(local_sdp_str,SOATAG_USER_SDP_STR(local_sdp_str)),
			    NUTAG_AUTOANSWER(0),
				TAG_END());
	
	return TRUE;
}
static apt_bool_t mrcp_sofia_on_session_answer(mrcp_session_t *session, mrcp_session_descriptor_t *descriptor)
{
	mrcp_sofia_session_t *sofia_session = session->obj;
	mrcp_sofia_agent_t *sofia_agent = session->signaling_agent->obj;
	const char *local_sdp_str = NULL;
	char sdp_str[2048];

	if(!sofia_agent || !sofia_session || !sofia_session->nh) {
		return FALSE;
	}

	if(descriptor->status != MRCP_SESSION_STATUS_OK) {
		int status = sip_status_get(descriptor->status);
		nua_respond(sofia_session->nh, status, sip_status_phrase(status),
					TAG_IF(sofia_agent->sip_contact_str,SIPTAG_CONTACT_STR(sofia_agent->sip_contact_str)),
					TAG_END());
		return TRUE;
	}

	if(sofia_agent->config->origin) {
		apt_string_set(&descriptor->origin,sofia_agent->config->origin);
	}

	if(sdp_string_generate_by_mrcp_descriptor(sdp_str,sizeof(sdp_str),descriptor,FALSE) > 0) {
		local_sdp_str = sdp_str;
		apt_log(APT_LOG_MARK,APT_PRIO_INFO,"Local SDP "APT_NAMESID_FMT"\n%s", 
			session->name,
			MRCP_SESSION_SID(session), 
			local_sdp_str);
	}

	nua_respond(sofia_session->nh, SIP_200_OK, 
				TAG_IF(sofia_agent->sip_contact_str,SIPTAG_CONTACT_STR(sofia_agent->sip_contact_str)),
				TAG_IF(local_sdp_str,SOATAG_USER_SDP_STR(local_sdp_str)),
				SOATAG_AUDIO_AUX("telephone-event"),
				NUTAG_AUTOANSWER(0),
				TAG_END());
	
	return TRUE;
}
static apt_bool_t mrcp_sofia_session_offer(mrcp_session_t *session, mrcp_session_descriptor_t *descriptor)
{
	char sdp_str[2048];
	const char *local_sdp_str = NULL;
	apt_bool_t res = FALSE;
	mrcp_sofia_session_t *sofia_session = session->obj;
	if(!sofia_session) {
		return FALSE;
	}

	if(session->signaling_agent) {
		mrcp_sofia_agent_t *sofia_agent = mrcp_sofia_agent_get(session);
		if(sofia_agent) {
			if(sofia_agent->config->origin) {
				apt_string_set(&descriptor->origin,sofia_agent->config->origin);
			}
		}
	}
	if(sdp_string_generate_by_mrcp_descriptor(sdp_str,sizeof(sdp_str),descriptor,TRUE) > 0) {
		local_sdp_str = sdp_str;
		sofia_session->descriptor = descriptor;
		apt_obj_log(APT_LOG_MARK,APT_PRIO_INFO,session->log_obj,"Local SDP "APT_NAMESID_FMT"\n%s", 
			session->name,
			MRCP_SESSION_SID(session), 
			local_sdp_str);
	}

	apr_thread_mutex_lock(sofia_session->mutex);

	if(sofia_session->nh) {
		res = TRUE;
		nua_invite(sofia_session->nh,
				TAG_IF(local_sdp_str,SOATAG_USER_SDP_STR(local_sdp_str)),
				TAG_END());
	}

	apr_thread_mutex_unlock(sofia_session->mutex);
	return res;
}