[asterisk-dev] SIP CANCEL/To tag

[Johansson Olle E]

>>
>> On other hand, 9.1 says:
>>
>>    The following procedures are used to construct a CANCEL  
>> request.  The
>>    Request-URI, Call-ID, To, the numeric part of CSeq, and From  
>> header
>>    fields in the CANCEL request MUST be identical to those in the
>>    request being cancelled, including tags.
>>
>> What does "including tags" really mean in this context? Does it  
>> mean the
>> tags, as updated by UAS?
>
> It means that we should send exactly what we sent in the INVITE,
> not the ones added later in the session by the UAS.

On the other hand, I meant to write but got sidetracked, the  
implementations
may wary since the RFC is not very clear - I guess.

Are you having problems?

/O