[OpenSER-Users] bye from gateway going to local address - sr-users

23 Oct 2007

Hi,
I have Openser 1.1 with Mediaproxy terminating calls to a AS5350 Cisco  
gateway.
Everything works fine, except when the PSTN party terminates the call. The  
cisco gateway then sends a bye message to the user-agents internal IP  
address instead of to the sip proxy's ip address.
Here's an ngrep:
1.2.3.204=cisco gateway
1.2.3.201=openser proxy
62.1.2.122=useragent external ip
192.168.1.10 = useragent internal ip

U 1.2.3.201:5060 -> 192.168.1.10:5060
BYE sip:test@62.1.2.122:5060 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=E6EFE450-D54>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKebda.e0002794.0.
Via: SIP/2.0/UDP  1.2.3.204:5060;branch=z9hG4bKCC881474.
From: <sip:04766343@192.168.1.10>;tag=E6EFE450-D54.
To: "3227842234" <sip:101002936@sip.server.com>;tag=6b26b6926603729o0.
Date: Tue, 23 Oct 2007 20:36:05 GMT.
Call-ID: 656e89a4-6b2eb629(a)192.168.1.24.
User-Agent: Cisco-SIPGateway/IOS-12.x.
Max-Forwards: 69.
Route:  
<sip:192.168.1.10;lr=on;ftag=6b26b6926603729o0;vsf=AAAAAEVVQkRwAwABGHFFUV5SAFpCaWVuc2ludmVzdG1lbnQuY29t>.
Timestamp: 1193171774.
CSeq: 101 BYE.
Reason: Q.850;cause=16.
Content-Length: 0.

So it looks to me like the Cisco is simply ignoring the record-route  
header.
Is this a config error in the cisco, or in Openser?
Pertinent bits of the openser config are:

         # Record Route Section
         if (method=="INVITE" && client_nat_test("3")) {
                 record_route_preset("1.2.3.201:5060;nat=yes");
         } else if (method!="REGISTER") {
                 record_route();
         };
         # Call Tear Down Section
         if (method=="BYE" || method=="CANCEL") {
                 end_media_session();
         };
         # Loose Route Section
         if (loose_route()) {
                 if ((method=="INVITE" || method=="REFER") &&
!has_totag())  
{
                         sl_send_reply("403", "Forbidden");
                         exit;
                 };
                 if (method=="INVITE") {
                         if (!allow_trusted()) {
                                 if
(!proxy_authorize("","subscriber")) {
                                         proxy_challenge("","0");
                                         exit;
                                 } else if (!check_from()) {
                                         sl_send_reply("403", "Use  
From=ID");
                                         exit;
                                 };
                                 consume_credentials();
                         };
                         if  
(client_nat_test("3")||search("^Route:.*;nat=yes")){
                                 setflag(6);
                                 use_media_proxy();
                         };
                 };
                 route(1);
                 exit;
         };
         # Call Type Processing Section
         if (!is_uri_host_local()) {
                 if (is_from_local() || allow_trusted()) {
                         route(4);
                         route(1);
                 } else {
                         sl_send_reply("403", "Forbidden");
                 };
                 exit;
         };
         if (method=="ACK") {
                 route(1);
                 exit;
         } else if (method=="CANCEL") {
                 route(1);
                 exit;
         } else if (method=="INVITE") {
                 route(3);
                 exit;
         } else  if (method=="REGISTER") {
                 route(2);
                 exit;
         };

route[1] {
         # Default Message Handler
         t_on_reply("1");
         if (!t_relay()) {
                 if (method=="INVITE" || method=="ACK") {
                         end_media_session();
                 };
                 sl_reply_error();
         };
}
route[2] {
         # REGISTER Message Handler
	# snipped
}
route[3] {
         # INVITE Message Handler
         if (client_nat_test("3")) {
                 setflag(7);
                 force_rport();
                 fix_nated_contact();
         };
         if (!allow_trusted()) {
                 if (!proxy_authorize("","subscriber")) {
                         proxy_challenge("","0");
                         exit;
                 } else if (!check_from()) {
                         sl_send_reply("403", "Use From=ID");
                         exit;
                 };
                 consume_credentials();
         };
         lookup("aliases");
         if (!is_uri_host_local()) {
                 route(4);
                 route(1);
                 exit;
         };
         route(4);
         route(5);
         exit;
};
route[4] {
         # NAT Traversal Section
         if (isflagset(6) || isflagset(7)) {
                if (!isflagset(8)) {
                        setflag(8);
                        use_media_proxy();
                };
         };
}

route[5] {
         # PSTN Handler Cisco
         rewritehost("1.2.3.204");
         route(1);
}
failure_route[1] {
         end_media_session();
}
onreply_route[1] {
         if (status=~"(180)|(183)|2[0-9][0-9]") {
                 if (!search("^Content-Length:[ ]*0")) {
                         use_media_proxy();
                 };
         };
         if (client_nat_test("1")) {
                 fix_nated_contact();
         };
}

Thanks for any help,

Richard