Bugs item #2819457, was opened at 2009-07-10 10:47 Message generated for change (Comment added) made by ibc_sf You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=743020&aid=2819457...

Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: modules Group: ver 1.5.x Status: Open Resolution: None Priority: 5 Private: No Submitted By: Alexandr Dubovikov (baron76) Assigned to: Nobody/Anonymous (nobody) Summary: dialog module. BYE with bad Cseq.

Initial Comment: the dialog module in timeout BYE request send thru tm_module Cseq number from INVITE.

dlg_req_within.c: function: dlg_t * build_dlg_t(struct dlg_cell * cell, int dir){ line: td->loc_seq.value = loc_seq;

if before final 200 OK, we will recieve PRACK/200 (new Cseq) , the dialog module will send bad Cseq number (loc_seq + 1);

Scenario: ----INVITE ( Cseq: 1) -> <--- 183 ( Cseq: 1) ---- ---- PRACK ( Cseq: 3) -> <---- 200 OK ( Cseq: 3) - ---------- timeout ----> ---- BYE ( Cseq: 2) -> <------ 503 (Bad CSeq number) -------

Quickly Solution: td->loc_seq.value = loc_seq + 100;

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Comment By: Iñaki Baz Castillo (ibc_sf)

Date: 2009-07-10 12:59

Message: This is a good example of why a proxy shouldn't try to behave as a B2BUA XD

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Comment By: Alexandr Dubovikov (baron76) Date: 2009-07-10 10:50

Message: oops: Scenario: ----INVITE ( Cseq: 1) -> <--- 183 ( Cseq: 1) ---- ---- PRACK ( Cseq: 3) -> <---- 200 OK ( Cseq: 3 PRACK) - <---- 200 OK ( Cseq: 1 INVITE) - ---------- timeout dialog ----> ---- BYE ( Cseq: 2) -> <------ 503 (Bad CSeq number) -------

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You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=743020&aid=2819457...