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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