[asterisk-dev] Passing Extended Headers in Responses

[Samir S]

Hello All,
We are using Asterisk to inter-work with our SIP clients....

We are sending some extended headers within the SIP clients...and it seems
that we may need to do some changes..to support this in asterisk...
Is that true ? Or does Asterisk have a feature, wherein it can simply pass
on any extended headers, which asterisk does not understand ?

So, while making the changes..it worked fine for the requests...(storing the
headers in the ast_channel, and then copying them
ast_channel_inherit_variables), seem to work out fine.
However, while sending the headers in the response..it is looking more
difficult...
For e.g. when sending them in 486-Busy...we can trace the invoke from
pbx_builtin_busy...
but not sure, how to link that ast_channel of the outgoing 486 with the
ast_channel of the incoming 486...to copy the headers..

Any help on this, would be very useful.
thanks in advance
Samir
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