Method MTWriteHighSide

SIP/SIPBase.cpp:1441–1479

This is called for the second and subsequent received INVITEs as well as the ACK. We send the current response, whatever it is.

// This is called for the second and subsequent received INVITEs as well as the ACK.
// We send the current response, whatever it is.
void SipMTInviteServerTransactionLayer::MTWriteHighSide(SipMessage *sipmsg) {	// Incoming message from SIPInterface.
	LOG(DEBUG);
	SipState state = getSipState();
	if (sipmsg->smGetCode() == 0) {
		if (sipmsg->isINVITE()) {
			if (mtLastResponse.smIsEmpty()) { MTCSendTrying(); }
			else { sipWrite(&mtLastResponse); }
		} else if (sipmsg->isACK()) {
			if (state == SSNullState || state == Proceeding || state == Connecting) {
				dialogPushState(Active,0);
				gSipInterface.dmAddLocalTag(dgGetDialog());
			} else {
				// We could be failed or canceled, so ignore the ACK.
			}
			stopTimers();	// happiness
			// The spec shows a short Timer I being started here, but all it does is specify a time
			// when the dialog will stop absorbing additional ACKS, thus suppressing error messages.
			// Well, how about if we just never throw an error for that?  Done.
		} else if (sipmsg->isCANCEL()) {
			SipMTCancel(sipmsg);
		} else if (sipmsg->isBYE()) {		// TODO: This should not happen.
			SipMTBye(sipmsg);
		} else if (sipmsg->isMESSAGE()) {
			// It is a duplicate MESSAGE.  Resend the current response.
			if (mtLastResponse.smIsEmpty()) {
				if (! gConfig.getBool("SIP.RFC3428.NoTrying")) { MTSMSSendTrying(); }	// Otherwise just ignore the duplicate MESSAGE.
			} else {
				sipWrite(&mtLastResponse);
			}
		} else {
			// Not expecting any others.  Must send 405 error.
			LOG(WARNING)<<"SIP Message ignored:"<<sipmsg;
			SipMessageReply oops(sipmsg,405,string("Method Not Allowed"),this);
			sipWrite(&oops);
		}
	} else {
		LOG(WARNING)<<"SIP Message ignored:"<<sipmsg;
	}
}

// Return TRUE to remove the dialog.
bool SipMTInviteServerTransactionLayer::mtPeriodicService()