[SIPForum-discussion] SIP testing: big SIP message

[Yang, Laura Jun (Laura)]

You may have long values in SIP headers like From, To, Contact. Many Via headers will also make a large INVITE message. See an example in section 3.1.1.7 in RFC 4475.

 

________________________________

From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Eugene Mednikov
Sent: Monday, June 18, 2007 11:50 PM
To: 'Kerry'; 'discussion at sipforum.org'
Subject: Re: [SIPForum-discussion] SIP testing: big SIP message

 

Greetings!

 

    I forgot to tell that I'm talking about huge INVITE.

 

Respectfully yours, Eugene Mednikov.

 

Software Engineer

Hermon Labs

972-4-6288001, 207

972-54-4520187

em at hermonlabs.com <blocked::mailto:em at hermonlabs.com> 

www.hermonlabs.com <blocked::http://www.hermonlabs.com> 

 

 

________________________________

From: Kerry [mailto:sukerry at 126.com] 
Sent: Sunday, June 17, 2007 3:28 PM
To: Eugene Mednikov; 'discussion at sipforum.org'
Subject: Re: [SIPForum-discussion] SIP testing: big SIP message

Eugene Mednikov，您好！ 

 

　　a message with a lot of Contacts is a good choice. 

      as per rfc3261, if a sip account is registered by multiple endpoints, there are many contacts in database for this account, and the ok message will contain all of the contacts , which results in a

       really large sip message

 

======== 2007-06-17 18:54:00 您在来信中写道： ========

 

	Greetings!

	 

	RFC 3261. 18.1.1 Sending Requests

	 

	   If a request is within 200 bytes of the path MTU, or if it is larger
	   than 1300 bytes and the path MTU is unknown, the request MUST be sent
	   using an RFC 2914 [43] congestion controlled transport protocol, such
	   as TCP. If this causes a change in the transport protocol from the
	   one indicated in the top Via, the value in the top Via MUST be
	   changed.  This prevents fragmentation of messages over UDP and
	   provides congestion control for larger messages.  However,
	   implementations MUST be able to handle messages up to the maximum
	   datagram packet size.  For UDP, this size is 65,535 bytes, including
	   IP and UDP headers.

	    How do I create message of length 65535 bytes? Huge SDP I assume. But I don't know length of message before SDP in advance. Is there any way to overcome that?

	 

	Respectfully yours, Eugene Mednikov.

	 

	Software Engineer

	Hermon Labs

	972-4-6288001, 207

	972-54-4520187

	em at hermonlabs.com <blocked::mailto:em at hermonlabs.com> 

	www.hermonlabs.com <blocked::http://www.hermonlabs.com> 

	 

= = = = = = = = = = = = = = = = = = = = = = 

　　　　　　　　致
礼！

 

　　　　　　　　　　　　　　Kerry

　　　　　　　　　　　　　　sukerry at 126.com

　　　　　　　　　　　　　　　2007-06-17

 

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