[SR-Users] Transaction Matching Failed - ACK BYE

[Alex Balashov]

Hi,

End-to-end ACKs (to confirm 2xx reply to INVITE transaction) and BYEs
are all separate transactions in their own right; they share a common
dialog with the initial INVITE request, but not a transaction. Why do
you expect them to match a known transaction?

-- Alex

On Sat, Mar 28, 2020 at 08:14:05PM +0000, egemen ulus wrote:

> Hi All,
> 
> I'm trying to establish a topology with Kamailio which is located between Asterisk and Outside.
> 
> My issue is "transaction matching failed" (t_check_trans failed). That means Kamailio does not recognise ACK & BYE message to forwards. I had a check on email list and google but found nothing.
> I'm using it with record_route.
> 
> SIP signalling and part of kamailio.cfg is below. Is there any suggestion?
> 
> 
> 
> route[WITHINDLG] {
> if (!has_totag()) return;
> if (loose_route()) {
> route(DLGURI);
> if (is_method("BYE")) {
> setflag(FLT_ACC); # do accounting ...
> setflag(FLT_ACCFAILED); # ... even if the transaction fails
> }
> else if ( is_method("ACK") ) {
> xlog("ack is came: $si:$sp\n");
> route(NATMANAGE);
> }
> else if ( is_method("NOTIFY") ) {
> record_route();
> }
> route(RELAY);
> exit;
> }
> if (is_method("SUBSCRIBE") && uri == myself) {
> route(PRESENCE);
> exit;
> }
> if ( is_method("ACK") ) {
> if ( t_check_trans() ) {
> route(RELAY);
> exit;
> } else {
> exit;
> }
> }
> sl_send_reply("404","Not here");
> exit;
> }
> 
> route[NATMANAGE] {
> #!ifdef WITH_NAT
> if (is_request()) {
> if(has_totag()) {
> if(check_route_param("nat=yes")) {
> setbflag(FLB_NATB);
> }
> }
> }
> 
> route(RTPPROXY);
> 
> if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)))
> return;
> if (is_request()) {
> if (!has_totag()) {
> if(t_is_branch_route()) {
> add_rr_param(";nat=yes");
> }
> }
> }
> if (is_reply()) {
> if(isbflagset(FLB_NATB)) {
> if(is_first_hop())
> set_contact_alias();
> }
> }
> #!endif
> return;
> }
> 
> 
> 
> 
> 
> Asterisk > Kamailio
> 
> INVITE sip:user at outside_ip SIP/2.0
> Via: SIP/2.0/UDP asterisk_ip:5060;branch=z9hG4bK1b56cce0
> Max-Forwards: 70
> From: "KUYRUK" <sip:0553847<tel:+10553847>aaaa at asterisk_ip>;tag=as3dde7cdb
> To: <sip:user at outside_ip>
> Contact: <sip:0553847<tel:+10553847>aaaa at asterisk_ip:5060>
> Call-ID: 62a480bf71d2a1aa0ec94b454cd98945 at asterisk_ip:5060
> CSeq: 102 INVITE
> User-Agent: Asterisk PBX 1.8.32.3
> 
> 
> Kamailio > Outside
> 
> INVITE sip:user at outside_ip SIP/2.0
> Record-Route: <sip:kamailio_ip;lr;nat=yes>
> Via: SIP/2.0/UDP kamailio_ip;branch=z9hG4bK7b3f.8e4716eeea4b0dc45cc51d21b5aded57.0
> Via: SIP/2.0/UDP asterisk_ip:5060;rport=5060;branch=z9hG4bK1b56cce0
> From: "KUYRUK" <sip:0553847<tel:+10553847>aaaa at asterisk_ip>;tag=as3dde7cdb
> To: <sip:user at outside_ip>
> Contact: <sip:0553847<tel:+10553847>aaaa at asterisk_ip:5060;alias=asterisk_ip~5060~1>
> Call-ID: 62a480bf71d2a1aa0ec94b454cd98945 at asterisk_ip:5060
> CSeq: 102 INVITE
> User-Agent: Asterisk PBX 1.8.32.3
> 
> 
> Outside > Kamailio
> 
> SIP/2.0 200 OK
> Via: SIP/2.0/UDP kamailio_ip;branch=z9hG4bK7b3f.8e4716eeea4b0dc45cc51d21b5aded57.0
> Via: SIP/2.0/UDP asterisk_ip:5060;rport=5060;branch=z9hG4bK1b56cce0
> From: "KUYRUK" <sip:0553847<tel:+10553847>aaaa at asterisk_ip>;tag=as3dde7cdb
> To: <sip:user at outside_ip>;tag=kv8iml6ur9
> Call-ID: 62a480bf71d2a1aa0ec94b454cd98945 at asterisk_ip:5060
> CSeq: 102 INVITE
> Record-Route: <sip:kamailio_ip;lr;nat=yes>
> Contact: <sip:user at outside_ip:5060;alias=x.x.x.x~18005~6;transport=udp>
> 
> 
> Kamailio > Asterisk
> 
> SIP/2.0 200 OK
> Via: SIP/2.0/UDP asterisk_ip:5060;rport=5060;branch=z9hG4bK1b56cce0
> From: "KUYRUK" <sip:0553847<tel:+10553847>aaaa at asterisk_ip>;tag=as3dde7cdb
> To: <sip:user at outside_ip>;tag=kv8iml6ur9
> Call-ID: 62a480bf71d2a1aa0ec94b454cd98945 at asterisk_ip:5060
> CSeq: 102 INVITE
> Record-Route: <sip:kamailio_ip;lr;nat=yes>
> Contact: <sip:user at outside_ip:5060;alias=x.x.x.x~18005~6;transport=udp>
> 
> 
> Asterisk > Kamailio THIS ACK IS NOT ROUTED TO OUTSIDE BY KAMAILIO!!
> 
> ACK sip:user at outside_ip:5060;alias=x.x.x.x~18005~6;transport=udp SIP/2.0
> Via: SIP/2.0/UDP asterisk_ip:5060;branch=z9hG4bK73366924
> Route: <sip:kamailio_ip;lr;nat=yes>
> From: "KUYRUK" <sip:0553847<tel:+10553847>aaaa at asterisk_ip>;tag=as3dde7cdb
> To: <sip:user at outside_ip>;tag=kv8iml6ur9
> Contact: <sip:0553847<tel:+10553847>aaaa at asterisk_ip:5060>
> Call-ID: 62a480bf71d2a1aa0ec94b454cd98945 at asterisk_ip:5060
> CSeq: 102 ACK
> User-Agent: Asterisk PBX 1.8.32.3
> 
> 
> 
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-- 
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/