[sip-comm-dev] Adding a SIP p2p mode without registrar

Emil Ivov emcho at sip-communicator.org
Thu Nov 15 12:45:26 CET 2007

Hi Michael,

Yes we'd be interested to have that. I believe it would be best to
integrate it in the existing provider so that we don't have to maintain
two forks of the same code.

If you don't have the time to do this you could post a patch as you
suggest. Personally I won't have the time to work on it either ... at
least not during the following two or three months, but once it's  on
the list someone else might want to play with it.


Koch Michael wrote:
> Hi all!
> Here's another followup to an e-mail discussion with Emil, where I told him
> about a feature which I have added to my private branch of SIP Communicator.
> We thought that would be of general interest.
>>> I wrote:
>>> * I've added a ProtocolProviderServiceSipNoRegistrarImpl, which allows
> you
>>> to make P2P SIP calls without having to register with a SIP registrar
> first
>>> (it just fakes the REGISTERED state of the
> ProtocolProviderServiceSipImpl).
>> Emil wrote:
>> This is also very nice, but I wonder what would be the best way to add
>> it to SIP Communicator. A separate provider would virtually mean
>> branching the sip protocol implementation and then making sure that all
>> bug fixes to one of the branches, are also copied to the other.
>> Couldn't we somehow add this as an option in the wizard?
>> Alternately, if you don't have the time to work on it any more, we could
>> create an optional downloadable plugin and make it available as soon as
>> we have our online repository.
> My change to the existing code isn't really big. I've refactored the
> ProtocolProviderServiceSipImpl into an
> AbstractProtocolProviderServiceSipImpl with implementations
> ProtocolProviderServiceSipImpl and
> ProtocolProviderServiceSipNoRegistrarImpl. The
> ProtocolProviderFactorySipImpl chooses the implementation to use when
> loading the account based on a new account property NO_REGISTRAR. This
> property could be set by the account wizard. The
> ProtocolProviderServiceSipNoRegistrarImpl simply doesn't contain the
> registering code of the ProtocolProviderServiceSipImpl and say it is
> registered at once when the register method is called. It also does only
> support the OperationSetBasicTelephony and OperationSetDTMF, since I don't
> know if the others will work without a registrar and didn't need them.
> If you are interested in this functionality, I could prepare a patch.
> Someone else would have to do the work of adapting the account wizard to
> support the option of not using a wizard, since unfortunately I don't have
> the time to do this.
> Regards
> Michael Koch

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