pjsip: avoid edge case potential crash in answer()
authorScott Griepentrog <sgriepentrog@digium.com>
Wed, 26 Feb 2014 19:00:56 +0000 (19:00 +0000)
committerScott Griepentrog <sgriepentrog@digium.com>
Wed, 26 Feb 2014 19:00:56 +0000 (19:00 +0000)
commit5a46d69543a7a485be624d1a95cf84bb9241ecb6
tree6c774ca021036e3c43419120a52b9f8f60b70c54
parent0e279c215e1935379f9a62c91f59f83c961c9c88
pjsip: avoid edge case potential crash in answer()

When accidentally compiling against a wrong version of
pjsip headers with a different pjsip_inv_session size,
the invite_tsx structure could be null in the answer()
function.  This led to a crash because it attempted to
send the session response with an uninitialized packet
pointer.  This patch presets packet to null and adds a
diagnostic log message to explain why the call fails.

Review: https://reviewboard.asterisk.org/r/3267/
........

Merged revisions 408970 from http://svn.asterisk.org/svn/asterisk/branches/12

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@408971 65c4cc65-6c06-0410-ace0-fbb531ad65f3
channels/chan_pjsip.c