private void RenewSession()
{
try
{
string sessionID = m_notificationsSessionID;
Thread.Sleep(RENEW_SESSION_LENGTH * 1000);
while (!HasClosed && sessionID == m_notificationsSessionID)
{
m_publisher.ExtendSession(m_notificationsAddress, m_notificationsSessionID, DEFAULT_SESSION_LENGTH);
Thread.Sleep(RENEW_SESSION_LENGTH * 1000);
}
}
catch (Exception excp)
{
logger.Error("Exception SIPSorceryVT100Server RenewSession. " + excp.Message);
}
}
/// <summary>
/// Attempts to renew an existing subscription.
/// </summary>
/// <returns>The session ID if the renewal was successful or null if it wasn't.</returns>
public string RenewSubscription(SIPRequest subscribeRequest, out SIPResponseStatusCodesEnum errorResponse, out string errorReason)
{
errorResponse = SIPResponseStatusCodesEnum.None;
errorReason = null;
try
{
int expiry = subscribeRequest.Header.Expires;
string toTag = subscribeRequest.Header.To.ToTag;
string fromTag = subscribeRequest.Header.From.FromTag;
string callID = subscribeRequest.Header.CallId;
int cseq = subscribeRequest.Header.CSeq;
// Check for an existing subscription.
SIPEventSubscription existingSubscription = (from sub in m_subscriptions.Values where sub.SubscriptionDialogue.CallId == callID select sub).FirstOrDefault();
if (existingSubscription != null)
{
if (expiry == 0)
{
// Subsciption is being cancelled.
StopSubscription(existingSubscription);
return(null);
}
else if (cseq > existingSubscription.SubscriptionDialogue.RemoteCSeq)
{
logger.Debug("Renewing subscription for " + existingSubscription.SessionID + " and " + existingSubscription.SubscriptionDialogue.Owner + ".");
existingSubscription.SubscriptionDialogue.RemoteCSeq = cseq;
//existingSubscription.ProxySendFrom = (!subscribeRequest.Header.ProxyReceivedOn.IsNullOrBlank()) ? SIPEndPoint.ParseSIPEndPoint(subscribeRequest.Header.ProxyReceivedOn) : null;
string extensionResult = m_publisher.ExtendSession(m_notificationsAddress, existingSubscription.SessionID, expiry);
if (extensionResult != null)
{
// One or more of the monitor servers could not extend the session. Close all the existing sessions and re-create.
MonitorLogEvent_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Notifier, SIPMonitorEventTypesEnum.SubscribeFailed, "Monitor session extension for " + existingSubscription.SubscriptionEventPackage.ToString() + " " + existingSubscription.ResourceURI.ToString() + " failed. " + extensionResult, existingSubscription.SubscriptionDialogue.Owner));
m_publisher.CloseSession(m_notificationsAddress, existingSubscription.SessionID);
// Need to re-establish the sessions with the notification servers.
string subscribeError = null;
string sessionID = Guid.NewGuid().ToString();
m_publisher.Subscribe(existingSubscription.SubscriptionDialogue.Owner, existingSubscription.SubscriptionDialogue.AdminMemberId, m_notificationsAddress, sessionID, SIPMonitorClientTypesEnum.Machine.ToString(), existingSubscription.MonitorFilter, expiry, null, out subscribeError);
if (subscribeError != null)
{
throw new ApplicationException(subscribeError);
}
else
{
lock (m_subscriptions)
{
m_subscriptions.Remove(existingSubscription.SessionID);
existingSubscription.SessionID = sessionID;
m_subscriptions.Add(sessionID, existingSubscription);
}
MonitorLogEvent_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Notifier, SIPMonitorEventTypesEnum.SubscribeAccept, "Monitor session recreated for " + existingSubscription.SubscriptionEventPackage.ToString() + " " + existingSubscription.ResourceURI.ToString() + ".", existingSubscription.SubscriptionDialogue.Owner));
}
}
MonitorLogEvent_External(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Notifier, SIPMonitorEventTypesEnum.SubscribeRenew, "Monitor session successfully renewed for " + existingSubscription.SubscriptionEventPackage.ToString() + " " + existingSubscription.ResourceURI.ToString() + ".", existingSubscription.SubscriptionDialogue.Owner));
return(existingSubscription.SessionID);
}
else
{
throw new ApplicationException("A duplicate SUBSCRIBE request was received by NotifierSubscriptionsManager.");
}
}
else
{
//throw new ApplicationException("No existing subscription could be found for a subscribe renewal request.");
errorResponse = SIPResponseStatusCodesEnum.CallLegTransactionDoesNotExist;
errorReason = "Subscription dialog not found";
return(null);
}
}
catch (Exception excp)
{
logger.Error("Exception RenewSubscription. " + excp.Message);
throw;
}
}
public string ExtendSession(string address, string sessionID, int expiry)
{
return(m_publisher.ExtendSession(address, sessionID, expiry));
}