<div dir="ltr"><div dir="ltr">There is a bug in 3.4's dialog or tm module:<div><br></div><div>A  ------- B (opensips) ------------ C</div><div><br></div><div>Call from A to B and then proxied to C.</div><div>C accepts and answers and acknowledges.</div><div>10 seconds later C sends a Re-Invite (Cseq x)</div><div>A responds with 200 OK (which is proxied to C).</div><div>As soon as C receives 200 OK, C sends an in-dialog INFO to B (Cseq x+1)</div><div>B sends INFO to A and receives ACK, ACK is sent to C (Cseq x+1)</div><div>~~ 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.</div><div><br></div><div>This seems to be caused by Cseq mapping. It did not exist in 3.1.</div><div><br></div><div>trace:</div><div><br></div><div><div>2025/09/26 16:10:21.361305 <a href="http://1.2.3.4:5060">1.2.3.4:5060</a> -> <a href="http://5.6.7.8:5060">5.6.7.8:5060</a></div><div>INVITE sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;rport;branch=z9hG4bKBSyUDj3X836DH</div><div>Route: <sip:5.6.7.8;lr;ftag=wzxe7s9s-CC-1049-OFC-32;did=33b.a26efd7></div><div>Max-Forwards: 26</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@1.2.3.4">sip:445566000@1.2.3.4</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@5.6.7.8">sip:981112223333@5.6.7.8</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 104891418 INVITE</div><div>Contact: <sip:445566000@1.2.3.4:5060;transport=udp></div><div>User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit</div><div>Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY</div><div>Supported: path, replaces</div><div>Content-Type: application/sdp</div><div>Content-Disposition: session</div><div>Content-Length: 222</div><div>X-FS-Support: update_display,send_info</div><div><br></div><div>v=0</div><div>o=FreeSWITCH 1758866897 1758866898 IN IP4 1.2.3.4</div><div>s=FreeSWITCH</div><div>c=IN IP4 1.2.3.4</div><div>t=0 0</div><div>m=audio 23516 RTP/AVP 8 116</div><div>a=rtpmap:8 PCMA/8000</div><div>a=rtpmap:116 telephone-event/8000</div><div>a=fmtp:116 0-15</div><div>a=ptime:20</div><div><br></div><div>2025/09/26 16:10:21.361421 <a href="http://5.6.7.8:5060">5.6.7.8:5060</a> -> <a href="http://1.2.3.4:5060">1.2.3.4:5060</a></div><div>SIP/2.0 100 Giving it a try</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@5.6.7.8">sip:981112223333@5.6.7.8</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@1.2.3.4">sip:445566000@1.2.3.4</a>>;tag=2m7re1yvj3F5F</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 104891418 INVITE</div><div>Content-Length: 0</div><div><br></div><div><br></div><div><br></div><div>2025/09/26 16:10:21.361910 <a href="http://5.6.7.8:5060">5.6.7.8:5060</a> -> <a href="http://9.10.11.12:5060">9.10.11.12:5060</a></div><div>INVITE sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0</div><div>Via: SIP/2.0/UDP 5.6.7.8:5060;branch=z9hG4bK5ee.de615a07.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH</div><div>Max-Forwards: 25</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@5.6.7.8">sip:445566000@5.6.7.8</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@9.10.11.12">sip:981112223333@9.10.11.12</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 5 INVITE</div><div>Contact: <sip:445566000@1.2.3.4:5060;transport=udp></div><div>User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit</div><div>Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY</div><div>Supported: path, replaces</div><div>Content-Type: application/sdp</div><div>Content-Disposition: session</div><div>Content-Length: 222</div><div>P-hint: rr-enforced</div><div><br></div><div>v=0</div><div>o=FreeSWITCH 1758866897 1758866898 IN IP4 1.2.3.4</div><div>s=FreeSWITCH</div><div>c=IN IP4 1.2.3.4</div><div>t=0 0</div><div>m=audio 23516 RTP/AVP 8 116</div><div>a=rtpmap:8 PCMA/8000</div><div>a=rtpmap:116 telephone-event/8000</div><div>a=fmtp:116 0-15</div><div>a=ptime:20</div><div><br></div><div>2025/09/26 16:10:21.362769 <a href="http://9.10.11.12:5060">9.10.11.12:5060</a> -> <a href="http://5.6.7.8:5060">5.6.7.8:5060</a></div><div>SIP/2.0 100 Giving it a try</div><div>Via: SIP/2.0/UDP 5.6.7.8:5060;received=5.6.7.8;rport=5060;branch=z9hG4bK5ee.de615a07.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@9.10.11.12">sip:981112223333@9.10.11.12</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@5.6.7.8">sip:445566000@5.6.7.8</a>>;tag=2m7re1yvj3F5F</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 5 INVITE</div><div>Content-Length: 0</div><div><br></div><div><br></div><div><br></div><div>2025/09/26 16:10:21.380894 <a href="http://9.10.11.12:5060">9.10.11.12:5060</a> -> <a href="http://5.6.7.8:5060">5.6.7.8:5060</a></div><div>SIP/2.0 200 OK</div><div>Via: SIP/2.0/UDP 5.6.7.8:5060;received=5.6.7.8;rport=5060;branch=z9hG4bK5ee.de615a07.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@5.6.7.8">sip:445566000@5.6.7.8</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@9.10.11.12">sip:981112223333@9.10.11.12</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>CSeq: 5 INVITE</div><div>Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REGISTER,PRACK,INFO,UPDATE,SUBSCRIBE,NOTIFY,MESSAGE,REFER,PUBLISH</div><div>Contact: <sip:9.10.11.12;did=33b.ae0baf63></div><div>Content-Length: 210</div><div>Content-Type: application/sdp</div><div><br></div><div>v=0</div><div>o=HuaweiSoftx3000 1743551938 1743551940 IN IP4 9.10.11.12</div><div>s=ATMS SBC</div><div>c=IN IP4 9.10.11.12</div><div>t=0 0</div><div>m=audio 16874 RTP/AVP 8 116</div><div>a=rtpmap:8 PCMA/8000</div><div>a=rtpmap:116 telephone-event/8000</div><div>a=ptime:20</div><div><br></div><div>2025/09/26 16:10:21.381041 <a href="http://5.6.7.8:5060">5.6.7.8:5060</a> -> <a href="http://1.2.3.4:5060">1.2.3.4:5060</a></div><div>SIP/2.0 200 OK</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKBSyUDj3X836DH</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@1.2.3.4">sip:445566000@1.2.3.4</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@5.6.7.8">sip:981112223333@5.6.7.8</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>CSeq: 104891418 INVITE</div><div>Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REGISTER,PRACK,INFO,UPDATE,SUBSCRIBE,NOTIFY,MESSAGE,REFER,PUBLISH</div><div>Contact: <sip:9.10.11.12;did=33b.ae0baf63></div><div>Content-Length: 210</div><div>Content-Type: application/sdp</div><div><br></div><div>v=0</div><div>o=HuaweiSoftx3000 1743551938 1743551940 IN IP4 9.10.11.12</div><div>s=ATMS SBC</div><div>c=IN IP4 9.10.11.12</div><div>t=0 0</div><div>m=audio 16874 RTP/AVP 8 116</div><div>a=rtpmap:8 PCMA/8000</div><div>a=rtpmap:116 telephone-event/8000</div><div>a=ptime:20</div><div><br></div><div><br></div><div>2025/09/26 16:10:21.401668 <a href="http://1.2.3.4:5060">1.2.3.4:5060</a> -> <a href="http://5.6.7.8:5060">5.6.7.8:5060</a></div><div>INFO sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;rport;branch=z9hG4bKc2QmFDm15cX0c</div><div>Route: <sip:5.6.7.8;lr;ftag=wzxe7s9s-CC-1049-OFC-32;did=33b.a26efd7></div><div>Max-Forwards: 70</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@1.2.3.4">sip:445566000@1.2.3.4</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@5.6.7.8">sip:981112223333@5.6.7.8</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 104891419 INFO</div><div>Contact: <sip:445566000@1.2.3.4:5060;transport=udp></div><div>User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit</div><div>Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY</div><div>Supported: path, replaces</div><div>Content-Type: service/hostedpbx</div><div>Content-Disposition: Info-Package</div><div>Content-Length: 168</div><div>Info-Package: extraservice</div><div><br></div><div>service=queue;action=3;cid=981112223333;cidname=1112223333;dest=445566000;forwarder=3;all=0.0,0.0;bll=0.0,0.0;</div><div><br></div><div>2025/09/26 16:10:21.402216 <a href="http://5.6.7.8:5060">5.6.7.8:5060</a> -> <a href="http://9.10.11.12:5060">9.10.11.12:5060</a></div><div>INFO sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0</div><div>Via: SIP/2.0/UDP 5.6.7.8:5060;branch=z9hG4bK4ee.6e62ffd4.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKc2QmFDm15cX0c</div><div>Max-Forwards: 30</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@5.6.7.8">sip:445566000@5.6.7.8</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@9.10.11.12">sip:981112223333@9.10.11.12</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 6 INFO</div><div>Contact: <sip:445566000@1.2.3.4:5060;transport=udp></div><div>User-Agent: FreeSWITCH-mod_sofia/1.10.12-release+git~20240802T210227Z~a88d069d6f~64bit</div><div>Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY</div><div>Supported: path, replaces</div><div>Content-Type: service/hostedpbx</div><div>Content-Disposition: Info-Package</div><div>Content-Length: 168</div><div>Info-Package: extraservice</div><div>P-hint: rr-enforced</div><div><br></div><div>service=queue;action=3;cid=981112223333;cidname=1112223333;dest=445566000;forwarder=3;all=0.0,0.0;bll=0.0,0.0;</div><div><br></div><div>2025/09/26 16:10:21.403096 <a href="http://1.2.3.4:5060">1.2.3.4:5060</a> -> <a href="http://5.6.7.8:5060">5.6.7.8:5060</a></div><div>ACK sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;rport;branch=z9hG4bKDBHDH8442NKKr</div><div>Route: <sip:5.6.7.8;lr;ftag=wzxe7s9s-CC-1049-OFC-32;did=33b.a26efd7></div><div>Max-Forwards: 70</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@1.2.3.4">sip:445566000@1.2.3.4</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@5.6.7.8">sip:981112223333@5.6.7.8</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 104891418 ACK</div><div>Content-Length: 0</div><div><br></div><div><br></div><div>2025/09/26 16:10:21.403365 <a href="http://5.6.7.8:5060">5.6.7.8:5060</a> -> <a href="http://9.10.11.12:5060">9.10.11.12:5060</a></div><div>ACK sip:9.10.11.12;did=33b.ae0baf63 SIP/2.0</div><div>Via: SIP/2.0/UDP 5.6.7.8:5060;branch=z9hG4bK5ee.de615a07.2</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKDBHDH8442NKKr</div><div>Max-Forwards: 30</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@5.6.7.8">sip:445566000@5.6.7.8</a>>;tag=2m7re1yvj3F5F</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@9.10.11.12">sip:981112223333@9.10.11.12</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 6 ACK</div><div>Content-Length: 0</div><div>P-hint: rr-enforced</div><div><br></div><div><br></div><div><br></div><div>2025/09/26 16:10:21.403477 <a href="http://9.10.11.12:5060">9.10.11.12:5060</a> -> <a href="http://5.6.7.8:5060">5.6.7.8:5060</a></div><div>SIP/2.0 200 OK</div><div>Via: SIP/2.0/UDP 5.6.7.8:5060;received=5.6.7.8;rport=5060;branch=z9hG4bK4ee.6e62ffd4.0</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKc2QmFDm15cX0c</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@9.10.11.12">sip:981112223333@9.10.11.12</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@5.6.7.8">sip:445566000@5.6.7.8</a>>;tag=2m7re1yvj3F5F</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 6 INFO</div><div>Content-Length: 0</div><div><br></div><div><br></div><div><br></div><div>2025/09/26 16:10:21.403615 <a href="http://5.6.7.8:5060">5.6.7.8:5060</a> -> <a href="http://1.2.3.4:5060">1.2.3.4:5060</a></div><div>SIP/2.0 200 OK</div><div>Via: SIP/2.0/UDP 1.2.3.4;received=1.2.3.4;rport=5060;branch=z9hG4bKc2QmFDm15cX0c</div><div>To: "1112223333" <<a href="mailto:sip%3A981112223333@5.6.7.8">sip:981112223333@5.6.7.8</a>>;tag=wzxe7s9s-CC-1049-OFC-32</div><div>From: "0445566000" <<a href="mailto:sip%3A445566000@1.2.3.4">sip:445566000@1.2.3.4</a>>;tag=2m7re1yvj3F5F</div><div>Call-ID: ww0q0moisw7zh30z9e9ow7qsoiz3i9s0</div><div>CSeq: 104891419 INFO</div><div>Content-Length: 0</div><div><br></div><div><br></div></div></div></div>