[SR-Users] Parsing Contact Port Field

Hello everyone, I have a potentially silly beginners question: how can I parse the contact port field and act on it in my routing logic? I know that the $ct variable contains the entire contact header and I can print it in an xlog() call. However, I’d like to do something like the following in my routing logic: . . . SIP CONTENT Contact: <sip:someaccount@192.168.86.104:5062>;expires=1800 . . . CONFIG LOGIC #!define PORT_SERVICE1 5061 #!define PORT_SERVICE2 5062 route { if ( src_port == PORT_SERVICE1 ) { xlog(“L_INFO”, “Received $rm from SERVICE1\n”); } else if ( src_port == PORT_SERVICE2 ) { xlog(“L_INFO”, “Received $rm from SERVICE2\n”); } } I realize that src_port is not the correct value to compare against. I want to compare against the originating contact’s port value. How can I extract the port field from $ct? Many thanks in advance and apologies for the beginners question. I’ve googled for what I think I’m trying to do without any real results on functions or tokenizers, etc. I’m using Kamailio 5.3.0. Regards, -Michael