Branch: refs/heads/2.4
  Commit: 994ab68ffccc28a8cb0cd03bc586570ad8bc5dba
  Author: Bogdan-Andrei Iancu <>
  Date:   2020-06-30 (Tue, 30 Jun 2020)

  Changed paths:
    M modules/uac/auth.c

  Log Message:
  Fixed uac_auth() on sequential requests in dialogs were uac_auth() was 
already used

The fix solves the conflict between the changes over the cseq value coming from 
(1) dialog module, trying to increment the cseq to compensate the cseq change 
during INVITE auth and (2) the uac module incrementing the cseq again because 
of auth'ing a sequential request.

The solution was to first indetify such case in uac_auth() and to use a larger 
delete lump (when replacing the cseq) in uac_auth(). Such a larger/wider delete 
lump will invalidate the lump added by the dialog module.

This is a follow up on #1969

Credits to Ben Newlin for reporting and assisting with the testing

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