protected Boolean SenRequest(TSIP_Request request)
{
TSIP_Transac transact = this.Stack.LayerTransac.CreateTransac(true, request, this);
switch (transact.Type)
{
case TSIP_Transac.tsip_transac_type_t.ICT:
case TSIP_Transac.tsip_transac_type_t.NICT:
{
/* Start the newly create IC/NIC transaction */
return(transact.Start(request));
}
}
return(false);
}
// this function is only called if no transaction match
// for responses, the transaction will always match
internal Boolean HandleIncomingMessage(TSIP_Message message)
{
TSIP_Dialog dialog = null;
TSIP_Transac transac = null;
Boolean cid_matched;
Boolean ret = false;
dialog = this.FindDialog(message.CallId.Value,
message.IsResponse ? message.To.Tag : message.From.Tag,
message.IsResponse ? message.From.Tag : message.To.Tag,
message.IsRequest ? (message as TSIP_Request).RequestType : TSIP_Message.tsip_request_type_t.NONE,
out cid_matched);
if (dialog != null)
{
if (message.IsCANCEL || message.IsACK)
{
ret = dialog.RaiseCallback(TSIP_Dialog.tsip_dialog_event_type_t.I_MSG, message);
goto bail;
}
else
{
transac = mStack.LayerTransac.CreateTransac(false, message, dialog);
}
}
else
{
if (message.IsRequest)
{
TSIP_Dialog newdialog = null;
switch ((message as TSIP_Request).RequestType)
{
case TSIP_Message.tsip_request_type_t.REGISTER:
{
/* incoming REGISTER */
TSIP_SessionRegister session = new TSIP_SessionRegister(mStack, message);
newdialog = new TSIP_DialogRegister(session, message.CallId == null ? null : message.CallId.Value);
break;
}
}
// for new dialog, create a new transac and start it later
if (newdialog != null)
{
transac = mStack.LayerTransac.CreateTransac(false, message, newdialog);
this.AddDialog(newdialog);
}
}
}
if (transac != null)
{
ret = transac.Start((message as TSIP_Request));
}
else if (message.IsRequest) /* No transaction match for the SIP request */
{
TSIP_Response response = null;
if (cid_matched) /* We are receiving our own message. */
{
response = new TSIP_Response(482, "Loop Detected (Check your iFCs)", (message as TSIP_Request));
if (String.IsNullOrEmpty(response.To.Tag))/* Early dialog? */
{
response.To.Tag = "doubango";
}
}
else
{
switch ((message as TSIP_Request).RequestType)
{
case TSIP_Message.tsip_request_type_t.OPTIONS: // Hacked to work on Tiscali IMS networks
case TSIP_Message.tsip_request_type_t.INFO:
{
response = new TSIP_Response(405, "Method Not Allowed", (message as TSIP_Request));
break;
}
default:
{
response = new TSIP_Response(481, "Dialog/Transaction Does Not Exist", (message as TSIP_Request));
break;
}
}
}
if (response != null)
{
// send the response
ret = mStack.LayerTransport.SendMessage(response.FirstVia != null ? response.FirstVia.Branch : "no-branch", response);
}
}
bail:
return(ret);
}