Hello all,
I would like to use the NUA abstraction layer for my very simplified SIP
call 'generator', which is of itself a kind of PBX (from SIP client point of
view). Maybe call it an 'announcement server', calling each client when
there is something to say :)
Basically my requirements are:
- Allow incoming registrations from multiple SIP clients
- Being able to make calls (INVITE) to those registered clients, where I
already know the media endpoints on my side. So I sent INVITE with valid SDP
entries.
- Being able to reINVITE to those clients
- Being able to end calls (CANCEL / BYE)
==> it is no problem if the contact-info or from-field of the sent INVITEs
equals for all clients.
My point is:
I would like to use NUA for this rather than NTA and then using the
test_proxy.c as reference.
Maybe I'm very wrong, but I'm under impression that this could be possible
when I was checking the developers archive referring to introduction to
nua_i_register and the discussion "NUTAG_IDENTITY and contact header"
somewhere middle 2006.
I'm aware that NUA is meant to be an UserAgent abstraction, but in principle
it could still acts as a user-agent towards each registered client.
If this is possible, can someone provide some guidelines? This since there
is no reference on how to do this. Especially with respect to how to use
nua_invite to build the correct messages to each client. The realization of
the register seems straight-forward, except that a (re)register from the
same client results into new handle so this gives me the impression that NUA
is just doing a pass-through and does not do any administration on these.
I'm willing to put the gathered knowledge in some Wiki / help to be added to
the Sofia online docs.
Please come with a positive response on NUA usage with this :)
With regards
EiSl
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