[Serusers] Ser as a presence server with other SIP proxy as registrar and rtp proxy

[Vaclav Kubart]

Hi,
your solution is possible - separated presence server from other SIP
communication. For forwarding you need cfg like this:

	if (method=="...") { # here put method name which should be forwarded
		if (!t_newtran()) {
			log(1, "newtran error\n");
			sl_reply_error();
			break;
		};
		
		if (!t_forward_nonack("machine.domain.com", 5060)) {
			log(1, "forward failed\n");
			t_reply("500", "Forward failed");
		}
		break;
	}

I'm using SER as proxy and other SER as presence server. Proxy forwards
presence related messages to presence server, it looks like:

route {
	# XML RPC
	if (method == "POST" ||  method == "GET") {
		create_via();
		dispatch_rpc();
		break;
	}

	# initial sanity checks -- messages with
	# max_forwards==0, or excessively long requests
	if (!mf_process_maxfwd_header("10")) {
		sl_send_reply("483","Too Many Hops");
		break;
	};
	if (msg:len >=  max_len ) {
		sl_send_reply("513", "Message too big");
		break;
	};
	
	# we record-route all messages -- to make sure that
	# subsequent messages will go through our proxy; that's
	# particularly good if upstream and downstream entities
	# use different transport protocol
	if (!method=="REGISTER") record_route();	

	# subsequent messages withing a dialog should take the
	# path determined by record-routing
	if (loose_route()) {
		# mark routing logic in request
		append_hf("P-hint: rr-enforced\r\n"); 
		route(1);
		break;
	};
	if (uri==myself) {
		
		if (method=="REGISTER") {
			if (!www_authenticate("test-domain.com", "credentials")) {
				www_challenge("test-domain.com", "0");
				break;
			};
			save("location");
			break;
		};	
	
		# ... process other messages here ...
		

		if ((method=="SUBSCRIBE") || (method=="PUBLISH")) {
			log(1, "Forwarding request\n");
			
			if (!t_newtran()) {
				log(1, "newtran error\n");
				sl_reply_error();
				break;
			};
			
			if (!t_forward_nonack("presence-server.mydomain.com", "5060")) {
				log(1, "Forward to PS failed\n");
				t_reply("500", "Forward failed");
			}
			break;
		};

		# native SIP destinations are handled using our USRLOC DB
		if (!lookup("location")) {
			sl_send_reply("404", "Not Found");
			break;
		};
	}
	route(1);
}

route[1] 
{
	# send it out now; use stateful forwarding as it works reliably
	# even for UDP2TCP
	if (!t_relay()) {
		sl_reply_error();
	};
}

On Tue, Mar 28, 2006 at 11:13:05AM +0300, ?lker Aktuna (Koç.net) wrote:
> Hi,
> 
> I already have a SIP proxy which handles SIP registers and acts as RTP proxy.
> But that one does not handle presence messages as SUBSCRIBE and PUBLISH.
> Is it possible to use Ser together with my Sip proxy ?
> 
> What I mean:
> - SIP clients will send all messages to SER.
> - SER will forward SIP messages like REGISTER, INVITE, NOTIFY to my SIP proxy with no modification to the message.
> - SER will also handle SIP messages related to presence and resource lists.
> 
> Is this possible ?
> What kind of configuration is needed ?
> 
> Thanks,
> ilker
> 
> 
> 
> 
>  <http://387555.sigclick.mailinfo.com/sigclick/040A0404/02044D00/024E0117231711.jpg>
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