[Asterisk-code-review] chan sip: Add dialplan function SIP HEADERS (asterisk[master])

[Kirill Katsnelson]

Hello Richard Mudgett, Jenkins2, 

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

    https://gerrit.asterisk.org/6119

to look at the new patch set (#4).

Change subject: chan_sip: Add dialplan function SIP_HEADERS
......................................................................

chan_sip: Add dialplan function SIP_HEADERS

Syntax: SIP_HEADERS([prefix])

If the argument is specified, only the headers matching the given prefix
are returned.

The function returns a comma-separated list of SIP header names from an
incoming INVITE message. Multiple headers with the same name are included
in the list only once. The returned list can be iterated over using the
functions POP() and SIP_HEADER().

For example, '${SIP_HEADERS(Co)}' might return the string
'Contact,Content-Length,Content-Type'.

Practical use is rather '${SIP_HEADERS(X-)}' to enumerate optional
extended headers sent by a peer.

ASTERISK-27163

Change-Id: I2076d3893d03a2f82429f393b5b46db6cf68a267
---
M CHANGES
M channels/chan_sip.c
2 files changed, 122 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/19/6119/4
-- 
To view, visit https://gerrit.asterisk.org/6119
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Gerrit-Project: asterisk
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I2076d3893d03a2f82429f393b5b46db6cf68a267
Gerrit-Change-Number: 6119
Gerrit-PatchSet: 4
Gerrit-Owner: Kirill Katsnelson <kkm at smartaction.com>
Gerrit-Reviewer: Jenkins2
Gerrit-Reviewer: Kirill Katsnelson <kkm at smartaction.com>
Gerrit-Reviewer: Richard Mudgett <rmudgett at digium.com>
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