[Asterisk-code-review] res pjsip refer.c: Delay sending the initial SIP Notify with... (asterisk[master])

[Kevin Harwell]

Hello Richard Mudgett, Anonymous Coward #1000019,

I'd like you to reexamine a change.  Please visit

    https://gerrit.asterisk.org/2322

to look at the new patch set (#3).

Change subject: res_pjsip_refer.c: Delay sending the initial SIP Notify with frag 100
......................................................................

res_pjsip_refer.c: Delay sending the initial SIP Notify with frag 100

During the transfer process, some phones (okay it was the Jitsi softphone,
but maybe others are out there) send a "bye" immediately after receiving a
SIP Notify. When a "bye" is received early for some types of transfers the
transferer channel may no longer be available during late stage transfer
processing.

For instance, during an attended transfer involving stasis bridging at one
point the created local channel looks for an associated swap channel in
order to retrieve the stasis application name. If the transferer has hung
up then the local channel will fail to find it. The local channel then has
no way to know which stasis app to enter, so it fails and hangs up as well.
Thus the transfer does not complete as expected.

This patch delays the sending of the initial notify in order to give the
transfer process enough time to gather the necessary data for a successful
transfer.

ASTERISK-25771

Change-Id: I09cfc9a5d6ed4c007bc70625e0972b470393bf16
---
M res/res_pjsip_refer.c
1 file changed, 14 insertions(+), 7 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/22/2322/3
-- 
To view, visit https://gerrit.asterisk.org/2322
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I09cfc9a5d6ed4c007bc70625e0972b470393bf16
Gerrit-PatchSet: 3
Gerrit-Project: asterisk
Gerrit-Branch: master
Gerrit-Owner: Kevin Harwell <kharwell at digium.com>
Gerrit-Reviewer: Anonymous Coward #1000019
Gerrit-Reviewer: Richard Mudgett <rmudgett at digium.com>