Some hints: A reply should have a to-tag. Openser adds a Via header during forwarding (with a generated branch.id). This branch.id is also used for transaction matching. regards klaus Edoardo Serra schrieb: > Hi all, > I'm trying to develop an extension to support SNOM's number > guessing feature (I don't know if it's somehow a standard but > description on how it works is here: > http://kb.snom.com/kb/index.php?View=entry&CategoryID=14&EntryID=14) > > As I have to do some 'complicated' db queries I was thinking to use > PERL module to handle number guessing request from the phone. > > I see there's no way (please correct me if I'm wrong) from OpenSER, > neither from OpenSER::Message, to send a stateless reply with a > customized body (SNOM says that possible number completion shoud be > included in the body of a 200 OK reply). > > For this reason I have to use Net::SIP to generate the reply packet > but I'm doing something wrong as OpenSER is not forwarding it back > to the client. > > Test client is a Snom 360 and is behind a NAT, OpenSER has a public IP > > Here is my routing logic in openser.cfg > > ------------------- BEGIN openser.cfg > route{ > > if (!mf_process_maxfwd_header("10")) { > sl_send_reply("483","Too Many Hops"); > exit; > }; > if (msg:len >= 2048 ) { > sl_send_reply("513", "Message too big"); > exit; > }; > > if (nat_uac_test("19")) { > fix_nated_contact(); > force_rport(); > setbflag(6); > } > > > if (method=="PUBLISH") { > if ($hdr(Event)=="number-guessing") { > log("- Initial PUBLISH\n"); > t_newtran(); > t_on_reply("1"); > perl_exec("numberguessing"); > exit; > } > sl_send_reply("501", "Not implemented"); > exit; > } > > if (method=="REGISTER") { > if (nat_uac_test("19")) { > fix_nated_contact(); > force_rport(); > setbflag(6); > } > save("location"); > exit; > }; > > exit; > } > > route[1] { > log("--------------------- Stateful Reply\n"); > if (!t_relay()) { > sl_reply_error(); > }; > exit; > } > ------------------- END openser.cfg > > Here is my Simple Perl > > > ------------------- BEGIN net-sip.pl > use OpenSER qw ( log ); > use OpenSER::Constants; > use Net::SIP; > > # Predefined body, not querying db yet > my $body = '"Franky Chang" sip:101@192.168.0.1;user=phone > "Steven Jones" sip:102@192.168.0.1;user=phone > "Marie Sun" sip:103@192.168.0.1;user=phone > '; > > > sub numberguessing { > my $m = shift; > my $pkt = Net::SIP::Request->new( $m->getMessage() ); > my $resp = $pkt->create_response(200, "OK"); > $resp->set_body($body); > > $resp->add_header('Content-Type','application/number-guessing'); > > my $leg = Net::SIP::Leg->new( > addr => '111.222.333.444', port => '5061'); > > $leg->deliver( $resp, '111.222.333.444:5060' ); > > # 111.222.333.444 is the IP of OpenSER > # I'm sending from port 5061 to port 5060 > > return 1; > } > ------------------- END net-sip.pl > > OpenSER in verbose debugging module says that it cannot find a > matching transaction for the 200 OK reply (probably because is > originated from port 5061 and it has never forwarded it to that > port ? ) > > Here is OpenSER DEBUG log: > > 0(24828) SIP Reply (status): > 0(24828) version: <SIP/2.0> > 0(24828) status: <200> > 0(24828) reason: <OK> > 0(24828) parse_headers: flags=2 > 0(24828) get_hdr_field: cseq <cseq>: <1> <PUBLISH> > 0(24828) DEBUG:parse_to:end of header reached, state=10 > 0(24828) DBUG:parse_to: display={"Edoardo"}, > ruri={sip:eserra@111.222.333.444} > 0(24828) DEBUG: get_hdr_field: <to> [43]; > uri=[sip:eserra@111.222.333.444] > 0(24828) DEBUG: to body ["Edoardo" <sip:eserra@111.222.333.444> > ] > 0(24828) Found param type 232, <branch> = <z9hG4bK-m3j054b6d8q6>; > state=6 > 0(24828) Found param type 235, <rport> = <n/a>; state=17 > 0(24828) end of header reached, state=5 > 0(24828) parse_headers: Via found, flags=2 > 0(24828) parse_headers: this is the first via > 0(24828) After parse_msg... > 0(24828) DEBUG:forward_reply: found module tm, passing reply to it > 0(24828) DEBUG: t_check: start=0xffffffff > 0(24828) parse_headers: flags=22 > 0(24828) DEBUG: t_reply_matching: failure to match a transaction > 0(24828) DEBUG: t_check: end=(nil) > 0(24828) parse_headers: flags=4 > 0(24828) DEBUG: get_hdr_body : content_length=135 > 0(24828) found end of header > 0(24828) ERROR:forward_reply: no 2nd via found in reply > 0(24828) DEBUG:destroy_avp_list: destroying list (nil) > 0(24828) receive_msg: cleaning up > > Here is also the tshark dump of the 2 packets (PUBLISH and its reply) > > Request-Line: PUBLISH sip:eserra@213.92.23.108 SIP/2.0 > Message Header > Via: SIP/2.0/UDP > 192.168.254.151:2051;branch=z9hG4bK-ma9r5n0t4jfq;rport > From: "Edoardo" <sip:eserra@111.222.333.444>;tag=39wlni6ex1 > To: "Edoardo" <sip:eserra@111.222.333.444> > Call-ID: 3c27c039249b-jml9w7t9sywx > CSeq: 1 PUBLISH > Max-Forwards: 70 > Event: number-guessing > Content-Type: application/text > Content-Length: 25 > Message body > Number: 10\r\n > Max-Hits: 3\r\n > > > Status-Line: SIP/2.0 200 OK > Message Header > call-id: 3c27c0daa600-emnlo1xcejtn > cseq: 1 PUBLISH > from: "Edoardo" <sip:eserra@111.222.333.444>;tag=6c1y8pp3fb > to: "Edoardo" <sip:eserra@111.222.333.444> > via: SIP/2.0/UDP > 192.168.254.151:2051;branch=z9hG4bK-623oddiyzg56;rport > content-type: application/number-guessing > Content-Length: 135 > Message body > "Franky Chang" sip:101@192.168.0.1;user=phone\n > "Steven Jones" sip:102@192.168.0.1;user=phone\n > "Marie Sun" sip:103@192.168.0.1;user=phone\n > > Hope this info is enough for a debug :) > > Tnx in advance > > Regards > > Edoardo Serra > EXSORSA LLC > > > _______________________________________________ > Users mailing list > Users(a)openser.org > http://openser.org/cgi-bin/mailman/listinfo/users