Re: [OpenSIPStack] How to send CANCEL msg? And why CANCEL is absent in the list ALLOW of INVITE msg ?

[Joegen E. B. <joe...@gm...>]

H.Kropf wrote:
> I wish to cancel an outgoing call which the remote side does not answer 
> longtime (ringin on remote side). For this purpose I should send message 
> CANCEL.
> For this it is necessary to call method CallSession:: SendCancel()?
> But how to obtain CallSession object?
>   

Which module are you referring to?  I am assuming you are referring to 
the SoftPhoneInterface module?  There is no need for you to cal 
SendCancel() directly.  Simply calling HangUpCall() will either send a 
BYE for mid-dialog and a CANCEL during setup stages.


> Some softphones (for example EyeBeam set) announce method CANCEL in the 
> list "Allow" of message INVITE. Why OSS does not do it?
>   

I have re-read RFC3261 and ACK and CANCEL are mandatory in the Allow 
header.  I was quick to assume that INVITE in allow header implies 
support for ACK and CANCEL.  I will patch the stack accordingly.  Thanks 
for pointing it out.



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