[Serusers] PSTN gateway failover

[Jan Janak]

When you are updating the documentation, I would suggest to mention one
more thing:

Using $to for any AVP operations might be a security hole, because To header
field it not used in message processing and might not be related to the the 
real callee whose SIP URI is in the Request-URI.

For example in the following message:

INVITE sip:george.w.bush at whitehouse.gov SIP/2.0
To: sip:john.kerry at whitehouse.gov

$to based avp_db_load would load AVPs for someone else than the message
recipient.

  Jan.

On 03-11 20:50, Marian Dumitru wrote:
> Hi Jiri,
> 
> thanks for you documentation overview. Yes indeed, there is a small 
> typing error. All module functions takes the parameters as quoted 
> string. AFAIK only couple of core function breaks this rule.
> I will add the " as soon as possible and regenerate the documentation.
> Again, thanks for the report.
> 
> Best regards,
> Marian Dumitru
> 
> 
> Jiri Kuthan wrote:
> >Nice.
> >
> >I'm wondering how the following line is supposed to be executed:
> >
> >   if (!(avp_db_load($ruri/domain,"s:t_ips/ips")
> >
> >I mean -- how is $uri/domain interpreted? Or is it just missing " 
> >in the documented script version that confuses me?
> >
> >Thanks,
> >
> >-jiri
> >
> >At 07:23 PM 11/2/2004, Marian Dumitru wrote:
> >
> >>Hi Andreas,
> >>
> >>you can implement GW failover by doing serial fork using AVPOPS module. 
> >>Pleas take a look at example number 4 - Serial forking:
> >>http://www.voice-system.ro/docs/avpops/
> >>You can store all GW IPs in database and load them via avp_db_load().
> >>If you don't want to hardcode even your first GW IP and to rely only on 
> >>the IP list from AVPs, be sure to push the fist AVP value into RURI in 
> >>main route before first sending to GW.
> >>Unfortunately, this approach doesn't offer load-balancing
> >>
> >>Best regards,
> >>Marian Dumitru
> >>
> >>Andreas Granig wrote:
> >>
> >>>Hi all,
> >>>Since SER does not provide DNS SRV failover capability, how do you 
> >>>perform failover for your PSTN gateways?
> >>>I currently think about some sort of load balancing with exec_dset() 
> >>>which looks up a gateway in a mysql db and give it 10 tries to find a 
> >>>gateway (SER is running on my.domain:5060)
> >>>route
> >>>{
> >>>if (!mf_process_maxfwd_header("10"))
> >>>{
> >>>  sl_send_reply("483", "Too many hops");
> >>>  break;
> >>>}
> >>><snip>
> >>>exec_dset("/my/sipgw-balancing-script"); # returns a random GW
> >>>t_on_failure("1");
> >>>t_relay();
> >>><snip>
> >>>}
> >>>failure_route[1]
> >>>{
> >>>if(t_check_status("503")
> >>>{
> >>>  rewritehostport("my.domain:5060"); # peform loop
> >>>  append_branch();
> >>>  t_relay();
> >>>}
> >>>}
> >>>Is this good practice? Any other ideas/optimizations?
> >>>
> >>>Cheers,
> >>>Andy
> >>>_______________________________________________
> >>>Serusers mailing list
> >>>serusers at lists.iptel.org
> >>>http://lists.iptel.org/mailman/listinfo/serusers
> >>
> >>-- 
> >>Voice Sistem
> >>http://www.voice-sistem.ro
> >>
> >>_______________________________________________
> >>Serusers mailing list
> >>serusers at lists.iptel.org
> >>http://lists.iptel.org/mailman/listinfo/serusers
> >
> >
> >--
> >Jiri Kuthan            http://iptel.org/~jiri/ 
> >
> >
> 
> -- 
> Voice Sistem
> http://www.voice-sistem.ro
> 
> _______________________________________________
> Serusers mailing list
> serusers at lists.iptel.org
> http://lists.iptel.org/mailman/listinfo/serusers