[Asterisk-Dev] Patch to support an "outgoing proxy" on SIP register

[Dietmar Zlabinger]

Hi,

the sip-channel-module of asterisk supports sending register requests
to a host different from the realm used in the SIP-message:

"register => user[:secret[:authuser]]@host[:port][/extension]"

But when I tried this syntax I failed to register at my SIP provider,
so I traced the messages sent out and found that "host" is used
in the SIP-uri (and not "REGISTER sip:authuser SIP/2.0") and that "user at authuser"
is used when authenticating (and not
"Authorization: Digest username="user", realm="authuser""),
therefore I modified the chan_sip.c so that I could register successfully,
I believe that the modifications I did are required to register using an
"outgoing proxy".

Please give me feedback if you believe that my modifications are of
general interest and if they should be included into the asterisk code.

The patch I have attached below is against todays cvs-repository,
you can also find the patch at http://www.zlabinger.at/chan_sip.patch

Best regards,

Dietmar Zlabinger

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