[SIPForum-discussion] SIP/2.0 400 Out-of-order request

[Ravi Ranjan Sinha]

Hello Debjit,

The response 400 means that there is any syntax error or some mandatory header is missing. In the below Register request Max-Forwards mandatory sip header is missing.

Regards,
Ravi SINHA
T :+33-1 71 08 05 50


________________________________
From: discussion-bounces at sipforum.org [discussion-bounces at sipforum.org] On Behalf Of debjit basu [debjit.basu at gmail.com]
Sent: Saturday, February 06, 2010 12:40 AM
To: SIP Babie
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] SIP/2.0 400 Out-of-order request

400 Bad Request means request is with bad syntax i.e some mandatory headers are missing. In your REGISTER request MAX FORWARD and Content-Length headers are missing.



On Fri, Feb 5, 2010 at 11:43 AM, SIP Babie <sipbabie at gmail.com<mailto:sipbabie at gmail.com>> wrote:
Hi All,

Could anybody explain me why "SIP/2.0 400 Out-of-order request" is been sent. As shown below, I received this response for the REGISTER request sent below.

REGISTER sip:softswitch.com<http://softswitch.com> SIP/2.0^M
Via: SIP/2.0/UDP 100.2.3.4:2198;branch=z9hG4bK*0003-000004d1^M
From: <sip:mediaserver at softswitch.com<mailto:sip%3Amediaserver at softswitch.com>>;tag=0000041f^M
To: <sip:mediaserver at softswitch.com<mailto:sip%3Amediaserver at softswitch.com>>^M
Call-ID: 3 at softswitch.com<mailto:3 at softswitch.com>^M
CSeq: 92601 REGISTER^M
Contact: <sip:mediaserver at 100.2.3.4:2198<http://sip:mediaserver@100.2.3.4:2198>>^M
Expires: 3600^M



SIP/2.0 400 Out-of-order request^M
Via: SIP/2.0/UDP 100.2.3.4:2198;branch=z9hG4bK*0003-000004d1^M
From: <sip:mediaserver at softswitch.com<mailto:sip%3Amediaserver at softswitch.com>>;tag=0000041f^M
To: <sip:mediaserver at softswitch.com<mailto:sip%3Amediaserver at softswitch.com>>;tag=b72e12N264b6d055c-49a3^M
Call-ID: 3 at softswitch.com<mailto:3 at softswitch.com>^M
CSeq: 92601 REGISTER^M
Contact: <sip:mediaserver at 100.2.3.4:2198<http://sip:mediaserver@100.2.3.4:2198>>;expires=3133^M
Contact: <sip:media at 100.2.3.4:2198<http://sip:media@100.2.3.4:2198>>;expires=2664^M
Expires: 3600^M
Content-Length: 0^M
^M

Regards,
SIPBABIE

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