New subject: [Users] Routing to NATed gateways

10 Nov 2005


      Hi Bogdan,
Yes, it does. Please pay attention that the called number must be
restored in  branch_route[].
Also, I still don't know what to do if lookup() fails (the gateway is
temporary down and therefore is not registered...) Any idea? Is it
planned to add loops possibility to  script language?
Best regards,
Leonid
-----Original Message-----
From: Bogdan-Andrei Iancu [mailto:bogdan@voice-system.ro] 
Sent: Thursday, November 10, 2005 15:36
To: Leonid Fainshtein
Cc: users@openser.org
Subject: Re: [Users] Routing to NATed gateways
Hi Leonid,
does the logic solved your problem? on a first view, the script look ok.
regarding the failure of lookup(); you can stick to sending an error
reply or you can try the next gateway provided by LCR.
regards,
bogdan
Leonid Fainshtein wrote:
...
In other words, the simplified configuration may be as the following:
# Save original user name (the called phone number).
   avp_printf("$orig_called_num", "$rU");
   if (load_gws())
   {
       if (next_gw())
       {
          if (lookup("location")) 
          {
               avp_pushto("$ruri/username", "$orig_called_num");
               t_on_failure("2");
               route(x); # NAT and other usual staff there
               exit;
          }
          else 
          {
               xlog("L_INFO", "I have to think what to do in this 
situation.\n");
               sl_send_reply("404", "User Not Found");
          }
       }
   }
failure_route[2]
{
   if (method=="INVITE" && t_check_status("408|500|503"))
   {
       if (!next_gw())
       {
           t_reply("503", "Service not available, no more gateways");
       }
       else
       {
           if (!lookup("location")) 
           {
               xlog("L_INFO", "I have to think what to do in this 
situation.\n");
               t_reply("503", "Service not available, no more 
gateways");
               exit;
           };
           t_on_failure("2");
           t_on_branch("2");
           t_relay();
       }
   }
}
branch_route[2]
{
   avp_pushto("$ruri/username", "$orig_called_num");
}
Am I correct? Actually I don't know what to do if one of the gateways 
is off-line (lookup() failed).
Best regards,
Leonid Fainshtein
-----Original Message-----
From: Bogdan-Andrei Iancu [mailto:bogdan@voice-system.ro]
Sent: Tuesday, November 08, 2005 5:30 PM
To: Leonid Fainshtein
Cc: users@openser.org
Subject: Re: [Users] Routing to NATed gateways
Hi Leonid,
the scenario you are probing might be already doable. Set in the LCR 
table some IP addresses which will be used as aliases: private 
addresses in 10.10.x.x class for example. Then register this IPs in 
usrloc pointing to the real GWs address.
So you can do lcr (next_gw) and then lookup.
for this to work, lcr must operate on RURI and not on DST_URI (not sure
...
how exactly is working).
regards,
bogdan
Leonid Fainshtein wrote:
...
Hi,
I'd like to use OpenSER for routing calls to NATed gateways. I also 
want to support the LCR feature. Unfortunately, the current LCR module
...
...
doesn't support NAT. I mean that the gateway IP addresses must be 
defined explicitly  in the "gtw" table. Now I'm looking for a way to 
force OpenSer to use information from the "location" table.
I want to write a module that will have the similar functionality like
...
...
the current LCR module has but resolving procedure will be more 
complicated (not based on prefix and From only). The module should 
build avp list where each gateway will have symbolic user name. For 
example, g1, g2 etc. The gateways will also be registered on the proxy
...
...
with those names. Then I think it will be possible to call
lookup("location") after successful call the next_gtw() from the
script.
...
Is it feasible? Is there another way to solve my problem?
Thank you in advance,
Leonid Fainshtein

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RE: [Users] Routing to NATed gateways