A SIP stack is a non-trivial amount of work to implement. Several 
man-years to get a basic stack working (at least, when you're me). (I 
wrote mine in Delphi.)

It's an intricate protocol. I think it's a very _abstract_ protocol, 
designed to be as open-ended as possible, which is why, IMO at least, 
it's such a beast. But then, when it's implemented and rolled out to 
devices with nothing but firmware, it's hard to change your mind.

I think the only thing that seriously makes me froth at the gills is 
that both RFC 2543 (the old SIP) and RFC 3261 (the new SIP) BOTH use 
"SIP/2.0" as protocol identifiers.

frank

On 2010/07/28 08:40, Igor Stasenko wrote:
> Yay. Been there did that :)
> Unfortunately , it was done in C++ and was pain to test and debug.
>
> On 27 July 2010 12:34, Frank Shearar<frank.shearar at angband.za.org>  wrote:
>> On 2010/07/27 10:56, Janko Mivšek wrote:
>>>
>>> Hi Frank,
>>>
>>> On 27. 07. 2010 10:48, Frank Shearar wrote:
>>>
>>>>>> (SIP uses NAPTR records as part of its lookup mechanism, defined in RFC
>>>>>> 3263 SIP: Locating SIP Servers.)
>>>>>
>>>>> Sweet! I had no idea. Josh will be glad to hear that I think :-)
>>>>
>>>> I really ought to revive my sadly-dormant SIP stack on SS.
>>>
>>> This sounds very interesting! Have you some further projects in mind
>>> with this SIP stack? Somewhere in a CTI (Computer Telephony Integration)
>>> direction?
>>
>> It's really just a stub - I started parsing the SIP messages, and then Real
>> Life soaked up all my time. (I've implemented a complete stack in Delphi, so
>> at least I know the protocol reasonably well. That's half the battle.)
>>
>> I'm not familiar with the term Computer Telephony Integration.
>>
>> With a completed SIP stack, what I'd really like to do is make it good
>> enough for Josh to use :). There are all sorts of interesting things one can
>> do with a SIP stack. My _personal_ goal would be to get a proper text-using
>> client up and running, and then extend it to a Total Conversation client
>> (voice/video/text).
>>
>>
>> frank
>>
>>
>
>
>