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[Retesh]

The below extract from RFC 3261 should be helpful -

21.4.1 400 Bad Request

   The request could not be understood due to malformed syntax.  The
   Reason-Phrase SHOULD identify the syntax problem in more detail, for
   example, "Missing Call-ID header field".


Regards
Retesh


On Wed, Nov 2, 2011 at 11:42 AM, VAMBARA, SAMPATH (SAMPATH)** CTR **
<sampath.vambara at alcatel-lucent.com> wrote:
>
>
> Hello,
>
>
>
> Some of my test cases are failing while testing our SIP application on a SIP
> stack.
>
> Can some one please tell me if any of the mandatory headers are missing in a
> SIP request, how the message should be handle by the SIP stack.
>
>
>
> For example.
>
> 1) If call ID is malformed and it is having an invalid character like
> call-Id:\t\b\c at xxx.com
>
> As per RFC, ‘\’ is an invalid character for called.
>
>
>
> 2) If Callid is not at all present in a SIP request or an incomplete message
> is received so that some of the mandatory headers are missing in the
> request.
>
>
>
> Thanks & Regards,
>
> Sampath
>
>
>
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