Ramin,
Search the archives for serialize_branches(), next_branch(), etc..
First, I think you want to do an enum lookup before the t_relay().
With any luck, the result can be serialized using serialize_branches(),
I haven't tried this, but it makes sense. Then you set t_on_failure(1) to
catch the subsequent t_relay() failure. Finally, you need to write
failure function to load the next branch (if any) with
next_branches(), set another
on failure, then t_relay().
I looked around in the archives, there are examples with serial/next
with redirect,
but I didn't see any with srv records...should work though.
-g
On 9/21/06, Ramin Dousti <dousti(a)gmail.com> wrote:
On 9/21/06, Steve Blair <blairs(a)isc.upenn.edu>
wrote:
Hi Steve,
> In the proxy you can check the status of the t_relay and take corrective
> action based on the result. Something like "if
(t_check_status("403"))
> ... do something... " should work. What action you take will depend upon
> the desired outcome. You could send the call to voicemail, a greeting
> server, a different gateway, etc.
Yes, that's exactly what I'm looking for. But there are some problems I'm
facing, which most probably is due to my own lack of understanding about
the available knobs:
1- When t-relay() return, the proxy already send the failure notice to
the client. This is not what I want, the "corrective action" must be
transparant
to the user.
2- I have two SRV's with the same weight, I do not see any kind of round-robin.
The request goes to only one of them.
Here is the (probably faulty) config:
route {
...
rewriteport ("");
#t_on_failure("1");
xlog("L_INFO", "Got the call\n");
if (! t_relay()) {
if (t_check_status("(403|487)|(408|477)")) {
xlog("L_ERR", "initial call failed\n");
if (t_newtran()) {
xlog("L_ERR", "Let's try again\n");
t_relay();
}
}
}
...
}
Can you help?
Ramin
> In the phones you can use SRV records to present a weighted list of
> proxy servers. The phone would register to a domain name which is a SRV
> record. This record resolves into the A records for each viable proxy.
> You could weight and prioritize the A records thereby giving the phones
> an ordered list of servers to try.
> -Steve
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