Re: ModeSelection compatibility with other GK settings

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Jan, thanks for your work!

I will of course prefer your patch. I also agree that settings and their
interactions are
getting pretty confusing. For example, ProxyAlways became useless when
ModeSelection was introduced cause it is nothing else than 0.0.0.0/0=PROXY
in terms of ModeSelection :)

Concerning ModeSelection and InternalNetwork I must say that a problem
exists which I can't solve just using ModeSelection. I'll try to describe
it.

Let us assume that we have 2 networks: 172.24.96.0/24 and 172.25.96.0/24. We
need to make Proxy work as follows:
1) calls between them SHOULD NOT be proxied (h245routed);
2) calls between them and let's say "all the rest" SHOULD be proxied.

How should I configure ModeSelection to implement this?

Documentation says: "The first mode is used for calls into and out of the
specified network. The second mode is used for calls that stay inside the
network. If only one mode is specified it is used for both cases."

My solution was:
[ModeSelection]
172.24.96.0/24=PROXY,H245ROUTED
172.25.96.0/24=PROXY,H245ROUTED

In this case I'll get item 2) fulfilled. But this would violate the
requirements of item 1) because calls between 172.24.96.0/24 and
172.25.96.0/24 will also be proxied.

That's why I changed SelectRoutingMode to use InternalNetwork for such
situations. This is probably not the right solution. But whould you kindly
help me to find it?

Regards,
Denis
 
-----Original Message-----
From: Jan Willamowius [mailto:jan@xxxxxxxxxxxxxx] 
Sent: Thursday, February 11, 2010 7:01 PM
To: openh323gk-users@xxxxxxxxxxxxxxxxxxxxx
Subject: Re:  ModeSelection compatibility with other GK
settings

Hi Dennis,

I agree with the first item, that the H245Routed setting should be
considered when we insert the implied rules for the internal networks.
I've added patch similar to yours into the CVS.

I'm not so sure with the 2nd item:
The ModeSelection rules allow a much more fine grained setting than the
old settings based on detected or configured internal networks.
If one want to override settings for detected internal networks with
ModeSelection rules, those should be applied regardless whether the
networks were detected as internal or not. .fromExternal here means "not
from within the netmask of this rule".
As a result, if you use any ModeSelection rules, you probably should
specify rules for all your networks and not rely on the other settings.

I would fully agree that the settings and their interactions are
getting pretty confusing. I think I would prefer to remove most of
the old switched and only use ModeSelection, but removing old options
isn't very popular with most users who just want to upgrade their
gatekeeper version. ;-)

Regards,
Jan


Denis Kochmashev "Enforta" wrote:
> Hello Jan and Simon!
>  
> I suppose that ModeSelection is incompatible with several .INI parameters.
>  
> 1.  RoutedMode.
> I see that in Toolkit::ProxyCriterion::LoadConfig "internal_netmode" is
set
> to CallRec::Proxied or to CallRec::SignalRouted regardless of global
> gatekeeper routed mode. So if H245Routed=1 is set in .INI it will be
> ignored.
>  
> 2.  InternalNetwork.
> In Toolkit::ProxyCriterion::SelectRoutingMode "mode" gets the value of
> .fromExternal even if both endpoints are on networks which are listed in
> InternalNetwork parameter.
>  
> I've made a small patch to Toolkit.cxx which makes proxy work as I need,
but
> I doubt that I did everything right. Please look at it. Probably it will
be
> useful.
>  
> Regards,
> Denis
>  


-- 
Jan Willamowius, jan@xxxxxxxxxxxxxx, http://www.gnugk.org/

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Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
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