There is a bug in 3.4's dialog or tm module: A ------- B (opensips) ------------ C
Call from A to B and then proxied to C. C accepts and answers and acknowledges. 10 seconds later C sends a Re-Invite (Cseq x) A responds with 200 OK (which is proxied to C). As soon as C receives 200 OK, C sends an in-dialog INFO to B (Cseq x+1) B sends INFO to A and receives ACK, ACK is sent to C (Cseq x+1) ~~ At this point, A sends ACK to the reinvite (Cseq was x). B ends this ACK to C with Cseq x+1 which is incorrect. This seems to be caused by Cseq mapping. It did not exist in 3.1. trace: 2025/09/26 16:10:21.361305 1.2.3.4:5060 -> 5.6.7.8:5060 INVITE sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0 Via: SIP/2.0/UDP 1.2.3.4;rport;branch=z9hG4bKBSyUDj3X836DH Route: <sip:5.6.7.8;lr;ftag=wzxe7s9s-CC-1049-OFC-32;did=33b.a26efd7> Max-Forwards: 26 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 104891418 INVITE Contact: <sip:[email protected]:5060;transport=udp> User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY Supported: path, replaces Content-Type: application/sdp Content-Disposition: session Content-Length: 222 X-FS-Support: update_display,send_info v=0 o=FreeSWITCH 1758866897 1758866898 IN IP4 1.2.3.4 s=FreeSWITCH c=IN IP4 1.2.3.4 t=0 0 m=audio 23516 RTP/AVP 8 116 a=rtpmap:8 PCMA/8000 a=rtpmap:116 telephone-event/8000 a=fmtp:116 0-15 a=ptime:20 2025/09/26 16:10:21.361421 5.6.7.8:5060 -> 1.2.3.4:5060 SIP/2.0 100 Giving it a try Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 104891418 INVITE Content-Length: 0 2025/09/26 16:10:21.361910 5.6.7.8:5060 -> 9.10.11.12:5060 INVITE sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0 Via: SIP/2.0/UDP 5.6.7.8:5060;branch=z9hG4bK5ee.de615a07.0 Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH Max-Forwards: 25 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 5 INVITE Contact: <sip:[email protected]:5060;transport=udp> User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY Supported: path, replaces Content-Type: application/sdp Content-Disposition: session Content-Length: 222 P-hint: rr-enforced v=0 o=FreeSWITCH 1758866897 1758866898 IN IP4 1.2.3.4 s=FreeSWITCH c=IN IP4 1.2.3.4 t=0 0 m=audio 23516 RTP/AVP 8 116 a=rtpmap:8 PCMA/8000 a=rtpmap:116 telephone-event/8000 a=fmtp:116 0-15 a=ptime:20 2025/09/26 16:10:21.362769 9.10.11.12:5060 -> 5.6.7.8:5060 SIP/2.0 100 Giving it a try Via: SIP/2.0/UDP 5.6.7.8:5060 ;received=5.6.7.8;rport=5060;branch=z9hG4bK5ee.de615a07.0 Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 5 INVITE Content-Length: 0 2025/09/26 16:10:21.380894 9.10.11.12:5060 -> 5.6.7.8:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 5.6.7.8:5060 ;received=5.6.7.8;rport=5060;branch=z9hG4bK5ee.de615a07.0 Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 CSeq: 5 INVITE Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REGISTER,PRACK,INFO,UPDATE,SUBSCRIBE,NOTIFY,MESSAGE,REFER,PUBLISH Contact: <sip:9.10.11.12;did=33b.ae0baf63> Content-Length: 210 Content-Type: application/sdp v=0 o=HuaweiSoftx3000 1743551938 1743551940 IN IP4 9.10.11.12 s=ATMS SBC c=IN IP4 9.10.11.12 t=0 0 m=audio 16874 RTP/AVP 8 116 a=rtpmap:8 PCMA/8000 a=rtpmap:116 telephone-event/8000 a=ptime:20 2025/09/26 16:10:21.381041 5.6.7.8:5060 -> 1.2.3.4:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 CSeq: 104891418 INVITE Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REGISTER,PRACK,INFO,UPDATE,SUBSCRIBE,NOTIFY,MESSAGE,REFER,PUBLISH Contact: <sip:9.10.11.12;did=33b.ae0baf63> Content-Length: 210 Content-Type: application/sdp v=0 o=HuaweiSoftx3000 1743551938 1743551940 IN IP4 9.10.11.12 s=ATMS SBC c=IN IP4 9.10.11.12 t=0 0 m=audio 16874 RTP/AVP 8 116 a=rtpmap:8 PCMA/8000 a=rtpmap:116 telephone-event/8000 a=ptime:20 2025/09/26 16:10:21.401668 1.2.3.4:5060 -> 5.6.7.8:5060 INFO sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0 Via: SIP/2.0/UDP 1.2.3.4;rport;branch=z9hG4bKc2QmFDm15cX0c Route: <sip:5.6.7.8;lr;ftag=wzxe7s9s-CC-1049-OFC-32;did=33b.a26efd7> Max-Forwards: 70 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 104891419 INFO Contact: <sip:[email protected]:5060;transport=udp> User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY Supported: path, replaces Content-Type: service/hostedpbx Content-Disposition: Info-Package Content-Length: 168 Info-Package: extraservice service=queue;action=3;cid=981112223333;cidname=1112223333;dest=445566000;forwarder=3;all=0.0,0.0;bll=0.0,0.0; 2025/09/26 16:10:21.402216 5.6.7.8:5060 -> 9.10.11.12:5060 INFO sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0 Via: SIP/2.0/UDP 5.6.7.8:5060;branch=z9hG4bK4ee.6e62ffd4.0 Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKc2QmFDm15cX0c Max-Forwards: 30 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 6 INFO Contact: <sip:[email protected]:5060;transport=udp> User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY Supported: path, replaces Content-Type: service/hostedpbx Content-Disposition: Info-Package Content-Length: 168 Info-Package: extraservice P-hint: rr-enforced service=queue;action=3;cid=981112223333;cidname=1112223333;dest=445566000;forwarder=3;all=0.0,0.0;bll=0.0,0.0; 2025/09/26 16:10:21.403096 1.2.3.4:5060 -> 5.6.7.8:5060 ACK sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0 Via: SIP/2.0/UDP 1.2.3.4;rport;branch=z9hG4bKDBHDH8442NKKr Route: <sip:5.6.7.8;lr;ftag=wzxe7s9s-CC-1049-OFC-32;did=33b.a26efd7> Max-Forwards: 70 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 104891418 ACK Content-Length: 0 2025/09/26 16:10:21.403365 5.6.7.8:5060 -> 9.10.11.12:5060 ACK sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0 Via: SIP/2.0/UDP 5.6.7.8:5060;branch=z9hG4bK5ee.de615a07.2 Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKDBHDH8442NKKr Max-Forwards: 30 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 6 ACK Content-Length: 0 P-hint: rr-enforced 2025/09/26 16:10:21.403477 9.10.11.12:5060 -> 5.6.7.8:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 5.6.7.8:5060 ;received=5.6.7.8;rport=5060;branch=z9hG4bK4ee.6e62ffd4.0 Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKc2QmFDm15cX0c To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 6 INFO Content-Length: 0 2025/09/26 16:10:21.403615 5.6.7.8:5060 -> 1.2.3.4:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKc2QmFDm15cX0c To: "1112223333" <sip:[email protected]>;tag=wzxe7s9s-CC-1049-OFC-32 From: "0445566000" <sip:[email protected]>;tag=2m7re1yvj3F5F Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0 CSeq: 104891419 INFO Content-Length: 0
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