I have not seen any rfc mentioning these headers... All the syntactically valid headers....
But a SIP entity came across these headers must pass it across as extension headers (when behaving like proxies...) and would be dropped (if the entity is behaving like UA for that particular request...) Thanks & Regards, Nataraju A.B. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Daniel-Constantin Mierla Sent: Saturday, November 19, 2005 6:10 PM To: Rod Recrio, Jr. Cc: [email protected] Subject: Re: [Sip-implementors] Header Fields Question Hello, On 11/18/05 12:47, Rod Recrio, Jr. wrote: > Hi! Are the following Header Fields standard SIP > message content: > > P-hint: USRLOC > P-RTP-Proxy: YES > P-Marked-Contact: YES > P-Behind-NAT: Yes > P-NAT-Checked: Yes > > I just can't find any materials to describe these > fields. I usually see these after the Content-Length > header and not sure if it is a header or part of the > body. Are these included in any RFCs (RFC-3261, > RFC-3581, etc.)? We are using Cisco AS5400 gateway. > can we get away without using these headers? > > I'll appreciate any help. Thanks. > All are headers, and looks like the message was processed by an OpenSER or SER proxy. They are valid according to the rfc and the UA must ignore them if it does not know how to process them. Some of these headers are added mainly for debugging/optimization reasons and they can be turned off from the OpenSER/SER proxy configuration. Such headers are used often to signal to any downstream OpenSER or SER proxy that specific processing has been taken and should not be done again. Daniel > Rod > > > > > __________________________________ > Yahoo! FareChase: Search multiple travel sites in one click. > http://farechase.yahoo.com > _______________________________________________ > Sip-implementors mailing list > [email protected] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > > _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
