Subject: [SIP] implementation inconsistentices of Supported and Date - a note to Implementors

From: [email-masked]
Date: Mon, 23 Oct 2000 09:10:34 +0530

Hi,
while testing with various vendor SIP entities we noted the following
grammar discrepencies. Mostly stacks are
lenient towards such  incoming mistakes, but small as they may be, it might
be worthwhile for the respective
vendors to fix their code.

1. Some vendors still use UTC format in the Date: header. SIP mandates it
to be GMT. Therefore a construct like
Date: Sat, 01 Jan 2000 06:32:29 UTC
is wrong.

2. Supported header is defined as 1#(option-tag) where option-tag is a
token. Therefore constructs such as
   Supported:aa bb cc
is wrong. It should be separated by "," not " "

Regds
Arjun

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