[SIPForum-discussion] Processing a SIP message containing multiple Request-Lines

[Jagan Mohan]

Hello,

    I'm having this scenario, where there are multiple Request-Lines in the
received SIP message.

    INVITE sip:test at server.com SIP/2.0
    UPDATE sip:test at server.com SIP/2.0
    BYE sip:test at server.com SIP/2.0
    From: ...
    To: ...
    Call-ID: ...
    Via: ...
     < Message Body>

    Here, I see there are two possible solutions to handle this.

1) Just use the first request line and continue processing the SIP message
as if it's an INVITE in this case.
2) Respond with a 400 Bad Request.

     Though my preference is to go with the first solution, I would like to
know which solution should be preferred.
     I could not find any reference to this behavior, in any RFC. Is there
any standard which talks about the same?

Thanks,
Jagan
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