[Serusers] Problem with ACK and INVITE - sr-users

13 Feb 2006


      Hello all,
I have:
UAC ---------- SER ------------ UAS
I have a problem with ACK.
When I send an INVITE, UAS sends a 200 OK and then UAC sends ACK to finalize 
the INVITE.
The problem is that SER doesn't reply this ACK from UAC to UAS.
This is my ser.cfg:
route{
    # initial sanity checks -- messages with
    # max_forwards==0, or excessively long requests
    if (!mf_process_maxfwd_header("16")) {
    	sl_send_reply("483","Too Many Hops");
    };
    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) {
    	# mark routing logic in request
    	append_hf("P-hint: outbound\r\n");
    	route(1);
    	break;
    };
# if the request is for other domain use UsrLoc
    # (in case, it does not work, use the following command
    # with proper names and addresses in it)
#	if (uri==myself) {
#	if 
(uri=~"^sip:(.+@)?(10.22.1.[0-9]+|(.+@)?(10.22.2.[0-9]+|(.+.)?T.local)([:;?].*)?$"){
#	if 
(uri=~"^sip:(.+@)?([0-9]+.[0-9]+.[0-9]+.[0-9]+|(.+.)?T.local)([:;?].*)?$"){
    if (uri=~"^sip:(.+@)?(.+)([:;?].*)?$"){
if (method=="REGISTER") {
# Uncomment this if you want to use digest authentication
#			if ((!www_authorize("10.22.1.249", "subscriber"))) {
#				www_challenge("10.22.1.249", "0");
#				break;
#			};
save("location");
    		break;
    	};
if (method=="BYE") {
    		t_relay();
    		sl_send_reply("200", "OK");
    		break;
    	};
    	if (method=="ACK") {
    		t_relay();
    		break;
    	};
    	if (method=="CANCEL") {
    		t_relay();
    		sl_send_reply("200", "OK");
    		break;
    	};
    	if (method=="INVITE") {
    	record_route();
    	};
    	if ((method=="INVITE")&&(!lookup("location"))) {
    		record_route();
    		exec_msg("printenv SRCIP; /bin/bash /usr/local/ser/sbin/script");
    		sl_send_reply("100", "Trying");
    		exec_msg("sleep 10");
if (!lookup("location")){
    		  sl_send_reply("100", "Trying");
    		  exec_msg("sleep 10");
    		} else {
    		  t_relay();
    		  break;
    		}
if (!lookup("location")){
    		  sl_send_reply("100", "Trying");
    		  exec_msg("sleep 10");
    		} else {
    		  t_relay();
    		  break;
    		}
if (!lookup("location")){
    		  sl_send_reply("100", "Trying");
    		  exec_msg("sleep 10");
    		} else {
    		  t_relay();
    		  break;
    		}
if (!lookup("location")){
    		  sl_send_reply("100", "Trying");
    		  exec_msg("sleep 10");
    		} else {
    		  t_relay();
    		  break;
    		}
if (!lookup("location")){
    		  sl_send_reply("100", "Trying");
    		  exec_msg("sleep 10");
    		} else {
    		  t_relay();
    		  break;
    		}
if (!lookup("location")){
    		  sl_send_reply("100", "Trying");
    		  exec_msg("sleep 10");
    		} else {
    		  t_relay();
    		  break;
    		}
if (!lookup("location")){
    		  sl_send_reply("404", "Not on-line");
    		  break;
    		} else {
    		  t_relay();
    		  break;
    		}
    	};
if (method=="SUBSCRIBE") {
    	    if (!t_newtran()) {
#		       log(1, "newtran error\n");
    	       sl_reply_error();
    	    };
    	    handle_subscription("registrar");
    	    break;
    	};
if (method=="PUBLISH") {
    	    if (!t_newtran()) {
#		       log(1, "newtran error\n");
    	       sl_reply_error();
    	    };
    	    handle_publish("registrar");
    	    break;
    	};
lookup("aliases");
    	if (!uri==myself) {
    		append_hf("P-hint: outbound alias\r\n");
    		route(1);
    		break;
    	};
# native SIP destinations are handled using our USRLOC DB
    	if (!lookup("location")) {
    		sl_send_reply("404", "Not Found");
    		break;
    	};
}
append_hf("P-hint: usrloc applied\r\n");
    route(1);
}
route[1]
{
    # send it out now; use stateful forwarding as it works reliably
    # even for UDP2TCP
    if (!t_relay()) {
    	sl_reply_error();
    };
}
Could someone help me?
Thank you.