29 Jun
2007
29 Jun
'07
11:22 a.m.
Hi Klaus:
RFC 3665 page 54 line 4:
A CANCEL constructed by a
client MUST have only a single Via header field value matching the
top Via value in the request being cancelled.
and RFC 3665 at page 53:
CANCEL is referred to as a "hop-by-hop" request, since it is
responded to at each stateful proxy hop.
and RFC 3665 at page 21:
Client: A client is any network element that sends SIP requests
and receives SIP responses. Clients may or may not interact
directly with a human user. User agent clients and proxies are
clients.
So, for my opinion, the role of proxy in this case of RFC 3665 section 3.8 is a client
when it sends CANCEL message to Bob.
If I misunderstand any RFC meanings, please correct me.
Thank you very much.
Best Regards,
Fangyu Ling
fancy wrote:
According to RFC 3665 section 3.8 and RFC 3261
section 9,
there is only one via header in CANCEL message
(message F11, F13 at page 72 of RFC 3665).
Hi!
I could find it in RFC 3665, but not in 3261. Where exactly in RFC 3261
is mentioned that the CANCEL has only 1 Via header?
Further, the example has only one Via header - but I could not find any
definition if this is a MUST or not.
How can I remove the 2nd via header?
You would have to modify tm module and change the code which generates
the CANCEL message.
regards
klaus