/// <summary>
/// Starts registering.
/// </summary>
/// <param name="autoRefresh">If true, registration takes care of refreshing itself to registrar server.</param>
/// <exception cref="ObjectDisposedException">Is raised when this object is disposed and and this method is accessed.</exception>
public void BeginRegister(bool autoRefresh)
{
if (m_IsDisposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
// Fix ME: Stack not running, try register on next step.
// In ideal solution we need to start registering when stack starts.
if (m_pStack.State != SIP_StackState.Started)
{
m_pTimer.Enabled = true;
return;
}
m_AutoRefresh = autoRefresh;
SetState(SIP_UA_RegistrationState.Registering);
/* RFC 3261 10.1 Constructing the REGISTER Request.
* Request-URI: The Request-URI names the domain of the location service for which the registration is meant (for example,
* "sip:chicago.com"). The "userinfo" and "@" components of the SIP URI MUST NOT be present.
*/
SIP_Request register = m_pStack.CreateRequest(SIP_Methods.REGISTER, new SIP_t_NameAddress(m_pServer.Scheme + ":" + m_AOR), new SIP_t_NameAddress(m_pServer.Scheme + ":" + m_AOR));
register.RequestLine.Uri = SIP_Uri.Parse(m_pServer.Scheme + ":" + m_AOR.Substring(m_AOR.IndexOf('@') + 1));
register.Route.Add(m_pServer.ToString());
register.Contact.Add("<" + this.Contact + ">;expires=" + m_RefreshInterval);
m_pRegisterSender = m_pStack.CreateRequestSender(register, m_pFlow);
m_pRegisterSender.ResponseReceived += new EventHandler <SIP_ResponseReceivedEventArgs>(m_pRegisterSender_ResponseReceived);
m_pRegisterSender.Start();
}
/// <summary>
/// Starts unregistering.
/// </summary>
/// <param name="dispose">If true, registration will be disposed after unregister.</param>
/// <exception cref="ObjectDisposedException">Is raised when this object is disposed and and this method is accessed.</exception>
public void BeginUnregister(bool dispose)
{
if (m_IsDisposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
m_AutoDispose = dispose;
// Stop register timer, otherwise we may get register and unregister race condition.
m_pTimer.Enabled = false;
if (m_State == SIP_UA_RegistrationState.Registered)
{
/* RFC 3261 10.1 Constructing the REGISTER Request.
* Request-URI: The Request-URI names the domain of the location service for which the registration is meant (for example,
* "sip:chicago.com"). The "userinfo" and "@" components of the SIP URI MUST NOT be present.
*/
SIP_Request unregister = m_pStack.CreateRequest(SIP_Methods.REGISTER, new SIP_t_NameAddress(m_pServer.Scheme + ":" + m_AOR), new SIP_t_NameAddress(m_pServer.Scheme + ":" + m_AOR));
unregister.RequestLine.Uri = SIP_Uri.Parse(m_pServer.Scheme + ":" + m_AOR.Substring(m_AOR.IndexOf('@') + 1));
unregister.Route.Add(m_pServer.ToString());
unregister.Contact.Add("<" + this.Contact + ">;expires=0");
m_pUnregisterSender = m_pStack.CreateRequestSender(unregister, m_pFlow);
m_pUnregisterSender.ResponseReceived += new EventHandler <SIP_ResponseReceivedEventArgs>(m_pUnregisterSender_ResponseReceived);
m_pUnregisterSender.Start();
}
else
{
SetState(SIP_UA_RegistrationState.Unregistered);
OnUnregistered();
if (m_AutoDispose)
{
Dispose();
}
m_pUnregisterSender = null;
}
}
/// <summary>
/// Starts terminating dialog.
/// </summary>
/// <param name="reason">Termination reason. This value may be null.</param>
/// <param name="sendBye">If true BYE is sent to remote party.</param>
/// <exception cref="ObjectDisposedException">Is raised when this class is Disposed and this method is accessed.</exception>
public void Terminate(string reason, bool sendBye)
{
lock (this.SyncRoot){
if (this.State == SIP_DialogState.Disposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
if (this.State == SIP_DialogState.Terminating || this.State == SIP_DialogState.Terminated)
{
return;
}
m_TerminateReason = reason;
/* RFC 3261 15.
* The caller's UA MAY send a BYE for either confirmed or early dialogs, and the callee's UA MAY send a BYE on
* confirmed dialogs, but MUST NOT send a BYE on early dialogs.
*
* RFC 3261 15.1.
* Once the BYE is constructed, the UAC core creates a new non-INVITE client transaction, and passes it the BYE request.
* The UAC MUST consider the session terminated (and therefore stop sending or listening for media) as soon as the BYE
* request is passed to the client transaction. If the response for the BYE is a 481 (Call/Transaction Does Not Exist)
* or a 408 (Request Timeout) or no response at all is received for the BYE (that is, a timeout is returned by the
* client transaction), the UAC MUST consider the session and the dialog terminated.
*/
if (sendBye)
{
if ((this.State == SIP_DialogState.Early && m_pActiveInvite is SIP_ClientTransaction) || this.State == SIP_DialogState.Confirmed)
{
this.SetState(SIP_DialogState.Terminating, true);
SIP_Request bye = CreateRequest(SIP_Methods.BYE);
if (!string.IsNullOrEmpty(reason))
{
SIP_t_ReasonValue r = new SIP_t_ReasonValue();
r.Protocol = "SIP";
r.Text = reason;
bye.Reason.Add(r.ToStringValue());
}
// Send BYE, just wait BYE to complete, we don't care about response code.
SIP_RequestSender sender = CreateRequestSender(bye);
sender.Completed += delegate(object s, EventArgs a){
this.SetState(SIP_DialogState.Terminated, true);
};
sender.Start();
}
else
{
/* We are "early" UAS dialog, we need todo follwoing:
*) If we havent sent final response, send '408 Request terminated' and we are done.
*) We have sen't final response, we need to wait ACK to arrive or timeout.
* If will ACK arrives or timeout, send BYE.
*/
if (m_pActiveInvite != null && m_pActiveInvite.FinalResponse == null)
{
this.Stack.CreateResponse(SIP_ResponseCodes.x408_Request_Timeout, m_pActiveInvite.Request);
this.SetState(SIP_DialogState.Terminated, true);
}
else
{
// Wait ACK to arrive or timeout.
this.SetState(SIP_DialogState.Terminating, true);
}
}
}
else
{
this.SetState(SIP_DialogState.Terminated, true);
}
}
}