[OpenSIPS-Users] Problem with Routing (extension -> opensips -> isp)

[Bogdan-Andrei Iancu]

HI Sheran,

Sheran Corera wrote:
> Hi,
>
> I am trying to use my opensips application to work as a router whereby
> extensions would be registered in my opensips box and the REGISTER
> request would be forwarded to my ISP. If the ISP is down it would
> connect to a secondary ISP. So essentially what I am trying to do is
> route the REGISTER messages of a given extension to multiple ISPs..
>   
So, bottom line, one incoming REGISTER must be parallely forked to 
several ISPs.
> Currently what I have done is this in my opensips.cfg file is this
>
> route{
>
>         if (!mf_process_maxfwd_header("10")) {
>                 sl_send_reply("483","Too Many Hops");
>                 exit;
>         }
>
>         if (src_ip == 192.168.7.48) {
>
>                 #remove misleading CONTACT header line
>                 remove_hf("Contact");
>                 #remove UTF-8 information, as * is not able to process
> it properly
>                 subst("/^(CONTENT-TYPE:.*);[ ]*charset=utf-8(.*)/\1\2/");
>                 #relay request to
>
>                 #relay register to server 1
>                 if (!t_relay("udp:192.168.15.41:5060")) {
>                         xlog("LOG: Goto asterisk  \n");
>                         sl_reply_error();
>                 }
>
>                 #relay register to server 2
>                 if (!t_relay("udp:192.168.15.42:5060")) {
>                         xlog("LOG: Goto asterisk  \n");
>                         sl_reply_error();
>                 }
>          }
> }
>   

This not really correct - do not do 2 t_relays for a single request. 
Better do parallel forking (fork the request in 2 directions) or 
replication (send to a primary destination and replicated it to a 
secondary one).
> so that registrations are now forwarded to the relay point (for
> testing purposes i have setup 2 asterisk installations). This works
> fine but asterisk registers the extension with the opensips domain.
> How do I change the domain part so that opensips passes the src_ip
> (the ip of the extension) to asterisk (external ISP) instead? (so that
> I would be able to register the extension on multiple ISPs and switch
> between them when i want without having to re register each time and
> the ISP would be able to communicate with the local extension to passs
> incoming calls directly to it)
>   
I understand the problem is * registers as contact point the IP of 
opensips? Or it is about the SIP domain in AOR ?

Regards,
Bogdan

> An alternative solution would be to make my opensips to work as an
> inbound server but that seems quite complicated. The help given is
> very much appreciated.
>
> Cheers..
> Sheran
>
> P.S - Sorry for the capitals..
>
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