void SessionTimer::updateTimer(AmSession* s, const AmSipReply& reply)
{
if (!session_timer_conf.getEnableSessionTimer())
return;
// only update timer on positive reply
if ((reply.code < 200) || (reply.code >= 300))
return;
// determine session interval
string sess_expires_hdr = getHeader(reply.hdrs, "Session-Expires");
if (sess_expires_hdr.empty())
sess_expires_hdr = getHeader(reply.hdrs, "x"); // compact form
session_interval = session_timer_conf.getSessionExpires();
session_refresher = refresh_local;
session_refresher_role = UAC;
if (!sess_expires_hdr.empty()) {
//session_interval = get_session_interval_from(req);
unsigned int sess_i_tmp = 0;
if (str2i(strip_header_params(sess_expires_hdr),
sess_i_tmp)) {
WARN("error while parsing Session-Expires header value '%s'\n",
strip_header_params(sess_expires_hdr).c_str()); // exception?
} else {
// this is forbidden by rfc, but to be sure against 'rogue' proxy/uas
if (sess_i_tmp < session_timer_conf.getMinimumTimer()) {
session_interval = session_timer_conf.getMinimumTimer();
} else {
session_interval = sess_i_tmp;
}
}
if (get_header_param(sess_expires_hdr, "refresher") == "uas") {
session_refresher = refresh_remote;
session_refresher_role = UAS;
}
}
removeTimers(s);
setTimers(s);
}
void AmSession::onSipRequest(const AmSipRequest& req)
{
CALL_EVENT_H(onSipRequest,req);
dlg.updateStatus(req);
DBG("onSipRequest: method = %s\n",req.method.c_str());
if(req.method == "INVITE"){
onInvite(req);
if(detached.get() && !getStopped()){
onSessionStart(req);
if(input || output)
AmMediaProcessor::instance()->addSession(this, callgroup);
else {
ERROR("missing audio input and/or ouput.\n");
}
}
}
else if( req.method == "BYE" ){
dlg.reply(req,200,"OK");
onBye(req);
}
else if( req.method == "CANCEL" ){
dlg.reply(req,200,"OK");
onCancel();
} else if( req.method == "INFO" ){
if ((strip_header_params(getHeader(req.hdrs, "Content-Type"))
=="application/dtmf-relay")||
(strip_header_params(getHeader(req.hdrs, "c"))
=="application/dtmf-relay")){
postDtmfEvent(new AmSipDtmfEvent(req.body));
dlg.reply(req, 200, "OK");
}
}
}
/**
* check if UAC requests too low Session-Expires
* (<locally configured Min-SE)
* Throws SessionIntervalTooSmallException if too low
*/
bool SessionTimerFactory::checkSessionExpires(const AmSipRequest& req)
{
//if (session_timer_conf.getEnableSessionTimer()) {
string session_expires = getHeader(req.hdrs, "Session-Expires", "x");
if (session_expires.length()) {
unsigned int i_se;
if (!str2i(strip_header_params(session_expires), i_se)) {
//if (i_se < session_timer_conf.getMinimumTimer()) {
//TODO: reply_error...
//throw SessionTimerException(session_timer_conf.getMinimumTimer());
//}
} else
throw AmSession::Exception(500,"internal error"); // malformed request?
}
//}
return true;
}
void AmB2BSession::onSipRequest(const AmSipRequest& req)
{
bool fwd = sip_relay_only &&
(req.method != SIP_METH_CANCEL);
if( ((req.method == SIP_METH_SUBSCRIBE) ||
(req.method == SIP_METH_NOTIFY) ||
(req.method == SIP_METH_REFER))
&& !subs->onRequestIn(req) ) {
return;
}
if(!fwd)
AmSession::onSipRequest(req);
else {
updateRefreshMethod(req.hdrs);
if(req.method == SIP_METH_BYE)
onBye(req);
}
B2BSipRequestEvent* r_ev = new B2BSipRequestEvent(req,fwd);
if (fwd) {
DBG("relaying B2B SIP request (fwd) %s %s\n", r_ev->req.method.c_str(), r_ev->req.r_uri.c_str());
if(r_ev->req.method == SIP_METH_NOTIFY) {
string event = getHeader(r_ev->req.hdrs,SIP_HDR_EVENT,true);
string id = get_header_param(event,"id");
event = strip_header_params(event);
if(event == "refer" && !id.empty()) {
int id_int=0;
if(str2int(id,id_int)) {
unsigned int mapped_id=0;
if(getMappedReferID(id_int,mapped_id)) {
removeHeader(r_ev->req.hdrs,SIP_HDR_EVENT);
r_ev->req.hdrs += SIP_HDR_COLSP(SIP_HDR_EVENT) "refer;id="
+ int2str(mapped_id) + CRLF;
}
}
}
}
int res = relayEvent(r_ev);
if (res == 0) {
// successfuly relayed, store the request
if(req.method != SIP_METH_ACK)
recvd_req.insert(std::make_pair(req.cseq,req));
}
else {
// relay failed, generate error reply
DBG("relay failed, replying error\n");
AmSipReply n_reply;
errCode2RelayedReply(n_reply, res, 500);
dlg->reply(req, n_reply.code, n_reply.reason);
}
return;
}
DBG("relaying B2B SIP request %s %s\n", r_ev->req.method.c_str(), r_ev->req.r_uri.c_str());
relayEvent(r_ev);
}
void SessionTimer::updateTimer(AmSession* s, const AmSipRequest& req) {
if((req.method == "INVITE")||(req.method == "UPDATE")){
remote_timer_aware =
key_in_list(getHeader(req.hdrs, SIP_HDR_SUPPORTED),"timer");
// determine session interval
string sess_expires_hdr = getHeader(req.hdrs, "Session-Expires", "x");
//session_interval = get_session_interval_from(req);
if (!sess_expires_hdr.empty()) {
if (str2i(strip_header_params(sess_expires_hdr),
session_interval)) {
WARN("error while parsing Session-Expires header value '%s'\n",
strip_header_params(sess_expires_hdr).c_str()); // exception?
session_interval = session_timer_conf.getSessionExpires();
}
} else {
session_interval = session_timer_conf.getSessionExpires();
}
// get Min-SE
unsigned int i_minse = session_timer_conf.getMinimumTimer();
string min_se_hdr = getHeader(req.hdrs, "Min-SE");
if (!min_se_hdr.empty()) {
if (str2i(strip_header_params(min_se_hdr),
i_minse)) {
WARN("error while parsing Min-SE header value '%s'\n",
strip_header_params(min_se_hdr).c_str()); // exception?
}
}
// calculate actual se
unsigned int min = session_timer_conf.getMinimumTimer();
if (i_minse > min)
min = i_minse;
if ((session_timer_conf.getSessionExpires() < min)||
(session_interval<min)) {
session_interval = min;
} else {
if (session_timer_conf.getSessionExpires() < session_interval)
session_interval = session_timer_conf.getSessionExpires();
}
// determine session refresher -- cf rfc4028 Table 2
// only if the remote party supports timer and asks
// to be refresher we will let the remote party do it.
// if remote supports timer and does not specify,
// could also be refresher=uac
if ((remote_timer_aware) && (!sess_expires_hdr.empty()) &&
(get_header_param(sess_expires_hdr, "refresher") == "uac")) {
DBG("session refresher will be remote UAC.\n");
session_refresher = refresh_remote;
session_refresher_role = UAC;
} else {
DBG("session refresher will be local UAS.\n");
session_refresher = refresh_local;
session_refresher_role = UAS;
}
removeTimers(s);
setTimers(s);
} else if (req.method == "BYE") { // remove all timers?
removeTimers(s);
}
}
