As per RFC 3261:
20.41 User-Agent
The User-Agent header field contains information about the UAC
originating the request. The semantics of this header field are
defined in [H14.43].
Revealing the specific software version of the user agent might allow
the user agent to become more vulnerable to attacks against software
that is known to contain security holes. Implementers SHOULD make
the User-Agent header field a configurable option.
Example:
User-Agent: Softphone Beta1.5
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Agarwal Manish-A19715
Sent: Thursday, August 23, 2007 7:46 AM
To: [email protected]
Subject: [Sip-implementors] Regarding User-Agent Header
Hi,
User-Agent header has its own grammar. However this header does not have
much semantic significance other than display. May I know your views on
if User-Agent header value has some deviations (like a LWS is missing
etc ) from grammar.
Can the deviations be accepted? or we must strictly follow the grammar.
Any inputs on how other servers/clients handle this would be great.
Regards
Manish
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