[asterisk-dev] [Code Review] Saving route header information even on a non-final response for proper UPDATE messages

[schmidts]

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https://reviewboard.asterisk.org/r/1505/
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Review request for Asterisk Developers and Olle E Johansson.


Summary
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i have found a problem with a blond transfer and connected_line UPDATE messages. 
When doing a transfer to a ringing channel the UPDATE message will not have any route information attached cause the route header is only parsed on a 200 response and not on a 180.

this small patch parses the contact header and also sets the proper route information even on a 180 respsonse so when an UPDATE messages is sent out, the route header is attached.

maybe doing the same for a 183 response would also be a good idea.


Diffs
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  team/schmidts/unleash-the-beast/channels/chan_sip.c 340107 

Diff: https://reviewboard.asterisk.org/r/1505/diff


Testing
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asterisk is behind a kamailio sip proxy which drops in-dialog messages with no prober route header. after parsing the route header of a 180 reponse the proxy forwards the information to the right end point.

normal transfer, blind transfer, ringing ... works fine.

CONNECTED_LINE function after the transfer also works like expected.


Thanks,

schmidts

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