void AmSession::updateRefreshMethod(const string& headers) {
if (refresh_method == REFRESH_UPDATE_FB_REINV) {
if (key_in_list(getHeader(headers, SIP_HDR_ALLOW),
SIP_METH_UPDATE)) {
DBG("remote allows UPDATE, using UPDATE for session refresh.\n");
refresh_method = REFRESH_UPDATE;
}
}
}
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);
}
}