[SIPForum-discussion] Carrying additional information in a SIP message.

[Eric Burger]

Do realize there is no arbitrary ability to add headers willy-nilly,  
like X- headers in email.

You can always register an INFO package.

On Oct 15, 2009, at 1:13 PM, prasanna c wrote:

> Hi,
>
> + Yes, you can carry any information in a SIP message. You can  
> introduce your SIP header to carry the IP address and the port number.
> + If the requirement is just to pass on the IP address & port  
> number, then you may want to use INFO SIP message, without  
> establishing any call.
>
> Regards,
> Prasanna
>
> To: discussion at sipforum.org
> From: pkayyanar at in.com
> Date: Wed, 14 Oct 2009 17:35:41 +0530
> Subject: [SIPForum-discussion] Carrying additional information in a  
> SIP message.
>
> Hi all,
>
> I have a requirement like, an IP address and a port number is got  
> from an external application which has to be carried in a SIP  
> message to another gateway. This additional information like IP and  
> port is used by another application on the remote gateway side to  
> establish a TCP connection to the gateway which initiated the SIP  
> Call.
>
> Now my question is
>
> 1. Is it possible to carry any additional information in a SIP  
> message.
> 2. If so which appropriate SIP message can be used.
> 3. How can I differentiate between a normal SIP Call(voice call) and  
> this Call which carries additional information.
>
> The constraint is the gateway which initiated the SIP Call, should  
> also disconnect the call, on dissconect the remote gateway which  
> established a TCP connection will disconnect the TCP connection too.
>
>
> Example:
>
> Remote Gateway 1 Remote Gateway2
>
> ---------- INVITE (SIP Message)----------------&g t;
> To
> Additional Info:
> IP and port
>
> <----------200 OK-------------------------------------
>
> ------------ACK---------------------------------------->
>
> <---------- Open TCP Connection------------------
>
> <----------BYE--------------------------------------------
>
> -----------200OK---------------------------------------->
>
> <----------Close TCP Connection ------------------
>
> Note: The SIP message used in this example is only to demonstrate  
> the scenario.
>
> Please let me know if there any specific SIP request that can carry  
> additional user information.
>
>
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>
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