Method newCheckInvite

SIP/SIP2Interface.cpp:618–649

}

bool SipInterface::newCheckInvite(SipMessage *msg)
{
	// Check for INVITE or MESSAGE methods.
	// Check channel availability now, too,
	// even if we are not actually assigning the channel yet.
	if (msg->isINVITE()) {
		gReports.incr("OpenBTS.SIP.INVITE.In");
		handleInvite(msg,true);
		return true;
	} else if (msg->isMESSAGE()) {
		gReports.incr("OpenBTS.SIP.MESSAGE.In");
		handleInvite(msg,false);
		return true;
	} else {

		// Is this a message for an existing INVITE transaction, ie, that part of the INVITE before ACK?
		// The findDialogMsg also finds a matching MESSAGE dialog or REGISTER dialog, but we are subsequently
		// testing against the INVITE via-branch, which will find only INVITE transactions.
		if (SipDialog *existing = findDialogByMsg(msg)) {
			// The ACK and CANCEL message are sent to the INVITE server transaction.
			// Other messages (BYE, INFO, etc) would be sent to the TU created for them.
			if (msg->smGetCode() ?  msg->smGetBranch() == existing->mInviteViaBranch : msg->isACK() || msg->isCANCEL()) {
				WATCH("SIP Sending message to existing dialog"<<LOGVAR2("state",existing->getSipState()));
				LOG(DEBUG) << "Sending message to existing dialog"<<LOGVAR(msg->smGetCode()) <<LOGVAR(msg->smGetBranch()) << LOGVAR(existing->mInviteViaBranch) << LOGVAR(msg->smGetMethodName()) << existing->dialogText();
				if (! existing->dgWriteHighSide(msg)) {
					LOG(ERR) << "Confusing SIP message not handled, to dialog:" <<existing->dialogText(false)<< " message was:"<<msg;
				}
				return true;	// We handled it or threw it away.
			}
		}
	}
}


void SipInterface::siDrive2()