[asterisk-dev] [Code Review] 3789: media formats: Clear chan_sip's pvt caps if peer's caps are available

[Matt Jordan]

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https://reviewboard.asterisk.org/r/3789/
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(Updated July 15, 2014, 7:42 p.m.)


Status
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This change has been marked as submitted.


Review request for Asterisk Developers.


Changes
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Committed in revision 418710


Repository: Asterisk


Description
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When we first create a SIP pvt, we set the capabilities from the global defaults, sip_cfg.caps. This is 'good', in the sense that if an end user (a) doesn't configure much or (b) the peer definition doesn't have capabilities, we use the defaults.

Currently, however, when a peer is found, we simply append the capabililties to the pvt. This has two problems:
(1) The peer may not have any capabilities
(2) If the peer does have capabilities, we simply append them to the dialog's capabilities. This allows a dialog to have capabilities that were not allowed. For example, since alaw is a 'default' capability, if a peer is configured with ulaw only, the overall capabilities of the dialog will be alaw|ulaw, and we would accept an INVITE request with alaw.

This patch clears the dialog capabilities if a peer has capabilities.


Diffs
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  ./team/group/media_formats-reviewed-trunk/channels/chan_sip.c 418631 

Diff: https://reviewboard.asterisk.org/r/3789/diff/


Testing
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All SIPp scenarios in SDP_offer_answer pass with this patch and the crash fix in r3788.


Thanks,

Matt Jordan

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