[Serusers] Domain and To header fields

Zeus Ng zeus.ng at isquare.com.au
Thu Sep 9 12:05:18 UTC 2004


Hi Martin,

Most likely, you are facing one of those "intelligence" agents. My
understanding is, the ua should send the ACK as either 012345 at localdomain or
+4912345 at finaldestination. Otherwise, 012345 at yourproxy plus route header.

The first one is like your initial INVITE request. The second is already
modified. The third one, you do not have to do anything with it. The final
part of the route header should be +4912345 at finaldestination and will be
handled by downstream proxy.

Please send ngrep output to confirm.

Zeus

> -----Original Message-----
> From: serusers-bounces at lists.iptel.org
> [mailto:serusers-bounces at lists.iptel.org] On Behalf Of Martin 
> Koenig [toplink-plannet GmbH]
> Sent: Thursday, 9 September 2004 1:33 AM
> To: Adrian Georgescu
> Cc: serusers at lists.iptel.org
> Subject: Re: [Serusers] Domain and To header fields
> 
> 
> Hi Adrian,
> 
> a call to pstn is 012345 at localdomain
> a call to iptel is 012345 at remotedomain
> 
> Now, the iptel-invite should not be touched and forwarded
> straight, the pstn 
> invite must be rewritten to +4912345 at localdomain.
> 
> Now the problem is if the UA initiating the call is sending
> an ACK. It will 
> send the ACK with Request-URI 012345 at finaldestination and 
> several route 
> header fields to traverse the proxy chain.
> 
> This 012345 at finaldestination must not be touched if the
> initial call was for 
> a remote domain (To will be 012345 at remotedomain), but it must 
> be rewritten 
> do +4912345 at finaldestination for a PSTN call (To will be 
> 012345 at localdomain). Thus there is the need to look after the 
> To value.
> 
> Thanks for your feedback,
> 
> regards,
> Martin
> 
> 
> ----- Original Message -----
> From: Adrian Georgescu
> To: Martin Koenig [toplink-plannet GmbH]
> Sent: Wednesday, September 08, 2004 5:28 PM
> Subject: Re: [Serusers] Domain and To header fields
> 
> 
> I understand better now. But why would you do that? If I
> understand maybe 
> some idea pops up.
> 
> 
> On Sep 8, 2004, at 5:15 PM, Martin Koenig [toplink-plannet
> GmbH] wrote:
> 
> 
> Hi Adrian,
> 
> the URI will not be local, it will be the remote target as
> defined for loose 
> routing.
> 
> Regards,
> Martin
> ----- Original Message -----
> From: Adrian Georgescu
> To: Martin Koenig
> Cc: serusers at lists.iptel.org
> Sent: Tuesday, September 07, 2004 10:41 PM
> Subject: [Serusers] Domain and To header fields
> 
> Martin, try is_uri_host_local()
> 
> Adrian
> 
> >>>>>>>>>>>>>>>
> 
> Hi List,
> 
> I have a multi domain ser setup with the domain module
> operating, and I need to check whether the TO header field 
> contains a local domain or not.
> 
> Can this be done with is_domain_local()? If yes how?
> 
> Or do i need to write a new function based on is_from_local()
> to achieve such a goal.
> 
> The Problem is that there is no possiblity to distinguish
> between our user calling 012345 at iptel.org (Remote SIP 
> desination) or 012345 at domain.com 
> (PSTN
> target) after (!) the initial INVITE, especially with loose 
> routing. This is important because Request-URIs to the PSTN 
> have to be transformed (add f.e.
> +49), but requests to other sip destinations have to not be touched.
> 
> Thanks for your input,
> 
> regards,
> 
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> 




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