Hello list,

I'm now to the list and sip, so please bare with me and my maybe basic question.

I'm working on some sort of sip proxy app, but I'm not 100% sure how
to process outgoing and incoming messages. I want to achieve, that all
traffic flows through the proxy.

I'm sure that I have to add a via header that points to my proxy for
outbound messages. So inbound responses to my requests will be sent to
the proxy.

Requests, that belong to a session (e.g. a inbound BYE that closess a
session that was initated by one of my clients) are sent directly to
the client. So I think I need a Record-Route or Route Header. Right?
So inbound requests that belong to existing sessions will also be sent
to the proxy.

Problem left: How do I achieve, that an inbound Invite will pass the
proxy? I'm sure that I have to modify the Register Message of that
client with the information, that Requests must be sent to the proxy,
but I don't know why.

So please can anybody tell me how I can do this or tell me the right
chapter in the rfc.

Thanks alot & happy holidays
Holger
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