[Serdev] Re: [Serusers] Loose routing question

[Jan Janak]

No, it is not call stateful. I still keep all the messages regarding
loose_route on my todo list for review, because there were many of them
and I am not sure where does the confusion come from. I'll get back to
it.

    Jan.

On 06-05-2005 11:20, Martin Koenig wrote:
> reticent wrote:
> 
> >Currently (in rel_0_9_) the "loose_route()" function will NOT match a
> >message unless SER has some stateful information regarding that
> >transaction in memory (my assumption has been that the information is
> >created when the "record_route()" or "record_route_preset()" functions
> >are used and is referenced by "loose_route()" according to the "tag=..."
> >header field inside the "Route:" header), so simply adding a "Route:
> >..." header into the sip message will not be loose_routed.
> > 
> >
> 
> Could a Developer please ACK / non-ACK this that Ser suddenly turned 
> call stateful?
> 
> Regards,
> Martin
> 
> >
> >
> >Michael Ulitskiy wrote:
> >
> > 
> >
> >>Hello,
> >>
> >>I'm trying to comprehend loose routing concept and I have
> >>a question that concerns me.
> >>As far as I understand loose routing says that if there're Route
> >>headers in a message it should be forwarded according to the URIs
> >>set in Route headers. 
> >>I thought that this is true only within a dialog, but RFC3261 (part 16.6) 
> >>says:
> >>"Requests establishing a dialog may contain a preloaded Route header 
> >>field."
> >>Also SER manual says: " the failure not to include loose routing in your 
> >>scripts may lead to infinite loops. Make sure that you include the 
> >>following script fragment immediately after request sanity checks" and 
> >>provide the following
> >>piece of code:
> >>if (loose_route()) {
> >>      t_relay();
> >>      break;
> >>};
> >>
> >>which as far as I understand unconditionally forwards message if Route 
> >>header
> >>is present.
> >>So I'm wondering what about security? If I follow this guidelines how I 
> >>would
> >>shield my PSTN gateway if anyone can construct message and 
> >>pre-load it with URI of my gateway and all my proxies must honor it.
> >>For example I have a PSTN gateway on ip address 10.1.1.5 and proxy
> >>on 10.1.1.10 that supposed to interface outside world.
> >>So I guess if someone construct a message like this:
> >>
> >>INVITE sip:12345 at somewhere.com SIP/2.0
> >>...
> >>Route: <sip:12345 at 10.1.1.5;lr>
> >>
> >>my proxy will forward it to PSTN gateway and it will make outbound call.
> >>
> >>Is this true? Please enlighten me on this.
> >>Thank you,
> >>
> >>Michael
> >>
> >>_______________________________________________
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> >>serusers at lists.iptel.org
> >>http://lists.iptel.org/mailman/listinfo/serusers
> >>
> >>
> >>
> >>
> >>   
> >>
> >
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> > 
> >
> 
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