[Asterisk-code-review] chan sip: Prevent extra Session-Expires headers from being ... (asterisk[certified/13.1])

[George Joseph]

George Joseph has uploaded a new patch set (#2).

Change subject: chan_sip:  Prevent extra Session-Expires headers from being added
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chan_sip:  Prevent extra Session-Expires headers from being added

When chan_sip does a re-INVITE to refresh a session and authentication
is required, the INVITE with the Authorization header containes a
second Session-Expires header without the ";refersher=" parameter.
This is causing some proxies to return a 400.  Also, when Asterisk is
the uas and the refresher, it is including the Session-Expires and
Min-SE headers in OPTIONS messages which is not allowed per RFC4028.

This patch (based on the reporter's) Checks to see if a Session-Expires
header is already in the message before adding another one.  It also
checks that the method is INVITE or UPDATE.

ASTERISK-26030 #close

Change-Id: I58a7b07bab5a3177748d8a7034fb8ad8e11ce1d9
---
M channels/chan_sip.c
1 file changed, 5 insertions(+), 3 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/56/2856/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I58a7b07bab5a3177748d8a7034fb8ad8e11ce1d9
Gerrit-PatchSet: 2
Gerrit-Project: asterisk
Gerrit-Branch: certified/13.1
Gerrit-Owner: George Joseph <gjoseph at digium.com>