[SIPForum-discussion] Parsing SIP Request without From Header

Rajdeep Ahluwalia rajdeepwalia at gmail.com
Sat May 9 19:43:26 UTC 2009

Hi Keerthi,

as from the following lines from the rfc3261 the from header is mandatory
so, a 400 bad request error should be returned

8.1.1 Generating the Request
A valid SIP request formulated by a UAC MUST, at a minimum, contain
the following header fields: To, From, CSeq, Call-ID, Max-Forwards,
and Via; all of these header fields are mandatory in all SIP

best regards

On Sat, May 9, 2009 at 1:05 PM, Keerthi
<keerthivarmansrinivasan at gmail.com>wrote:

> Hi All,
> I need a clarification on parsing the SIP Request in sip stack.
> If the sip stack receives the REGISTER request without From Header. then
> the SIP Stack should throw an error message or should return a success
> SIP Message?
> Please clarify   :-) ..
> --
> Regards,
> Keerthi.
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