[asterisk-dev] [Code Review] Properly route responses according to the Via headers in the request

[Matthew Nicholson]

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https://reviewboard.asterisk.org/r/1059/
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(Updated 2011-01-17 15:19:03.187514)


Review request for Asterisk Developers.


Changes
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Updated to check if maddr is a multicast address before processing the ttl value.


Summary
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This patch makes asterisk respect the Via headers in a request when responding to the request. Without this patch, the request is always routed back to the address the initial request was received from (unless nat=yes).  This can cause problems if the initial request comes through a proxy and additional requests (such as INFO dtmf tones) come from a different proxy.


Diffs (updated)
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  /branches/1.4/channels/chan_sip.c 302160 

Diff: https://reviewboard.asterisk.org/r/1059/diff


Testing
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Briefly tested using openser as a proxy and another asterisk machine as the requester.  I sent and invite, then some INFO DTMF messages.  Without the patch, our asterisk machine sends all responses to the INFO requests to the proxy, with the patch they are properly routed to the requesting asterisk machine.


Thanks,

Matthew

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