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
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