18 Jul
2004
18 Jul
'04
7 p.m.
On Jul 18, 2004 at 11:22, Linus Surguy
<linus(a)magrathea-telecom.co.uk>
wrote:
> > Contacts are used to advertised wherebouts
for subsequent in-dialog
> > requests coming back to your UAC. For that reason, I don't entirely
> > understand why the UAC includes Contact in CANCEL at all -- all in all
> > CANCEL is used to discontinued estabslishment of a dialog. Anyhow,
> > it should not matter the Contact content is invalid since there is no
> > use for the header field in this case at all.
>
> Sorry, just realised that in a half-awake state I typed rubbish. I meant
> that the 'call-id' was not rewritten - don't know why I mentioned
contact!
> (In the INVITE to the Cisco it is blah(a)213.x.x.x
and in the CANCEL to
Cisco
it is
blah(a)10.x.x.x
Then it's even stranger. ser/nathelper doesn't re-write the callid.
Maybe you have a nat box on the way, which is trying to be smart and fix
sip messages.