[Serusers] Redirect responses and accounting

[Thomas Björklund]

Hi everyone,

I've been away from SER for a long time but now I have renewed interest.

I'm confronted by a problem I've failed to solve by my self, maybe you 
could help, this is regarding accounting and what happens when a customer 
responds with a 3xx response (i.e. redirect).


Call from customer to proxy works fine.

 0(13212) Mon Feb 28 02:38:23 2005 - 130.244.194.233 - INVITE
Call-ID: 00036bc3-7aa519a2-610f6e63-7f1e22c2 at 130.244.194.233
From: sip:0856204081 at sip-corporate1.testdomain.com
To: sip:0890510 at sip-corporate1.testdomain.com
 0(13212) Routeblock 2 - Calls from customers
 0(13212) Call from customer: Test
 0(13212) Call passed A-number check
 0(13212) Routeblock 3 - To customer?
 0(13212) Routeblock 4 - Call not to customer, to gateways
 0(13212) Replyroute 1
 0(13212) Replyroute 1
 0(13212) Replyroute 1
 0(13212) ACC: transaction answered: method=INVITE, uid=n/a, 
call_id=00036bc3-7aa519a2-610f6e63-7f1e22c2 at 130.244.194.233, 
from="0856204081" 
<sip:0856204081 at sip-corporate1.testdomain.com>;tag=00036bc37aa5007d581f01d7-0ea60293, 
to=<sip:0890510 at sip-corporate1.testdomain.com>;tag=18F3A96C-20F4, 
i-uri=sip:0890510 at sip-corporate1.testdomain.com, 
o-uri=sip:0890510 at sip-gw.swip.net:5060, 
fromtag=00036bc37aa5007d581f01d7-0ea60293, code=200
 0(13212) ACC: transaction answered: method=BYE, uid=n/a, 
call_id=00036bc3-7aa519a2-610f6e63-7f1e22c2 at 130.244.194.233, 
from="0856204081" 
<sip:0856204081 at sip-corporate1.testdomain.com>;tag=00036bc37aa5007d581f01d7-0ea60293, 
to=<sip:0890510 at sip-corporate1.testdomain.com>;tag=18F3A96C-20F4, 
i-uri=sip:0890510 at 130.244.190.42:5060;ftag=00036bc37aa5007d581f01d7-0ea60293;lr=on, 
o-uri=sip:0890510 at 130.244.188.14:5060, 
fromtag=00036bc37aa5007d581f01d7-0ea60293, code=200


Accounting works fine with START, STOP

Call from PSTN to customer, works fine, I have choosen not to generate a 
START record to make it easier for the billing department.

 0(13212) Mon Feb 28 02:41:24 2005 - 130.244.188.14 - INVITE
Call-ID: 8CB1DEF-889B11D9-80F1FA83-930B318E at 130.244.188.14
From: sip:0856264000 at 130.244.188.14
To: sip:0856204081 at 130.244.190.42
 0(13212) Call from gateway
 0(13212) Routeblock 3 - To customer?
 0(13212) Call to customer: Test
 0(13212) Replyroute 1
 0(13212) Replyroute 1
 0(13212) Replyroute 1
 0(13212) ACC: transaction answered: method=BYE, uid=n/a, 
call_id=8CB1DEF-889B11D9-80F1FA83-930B318E at 130.244.188.14, 
from=<sip:0856264000 at 130.244.188.14>;tag=18F66B24-226F, 
to=<sip:0856204081 at 130.244.190.42>;tag=00036bc37aa5007f1d13f1ad-2475ba78, 
i-uri=sip:0856204081 at 130.244.190.42:5060;ftag=18F66B24-226F;lr=on, 
o-uri=sip:0856204081 at 130.244.194.233:5060, fromtag=18F66B24-226F, code=200


Here comes the tricky part.

Call from PSTN to customer and customer has redirected his extension to a 
PSTN number.

 0(13212) Mon Feb 28 02:42:49 2005 - 130.244.188.14 - INVITE
Call-ID: 3B95F3CB-889B11D9-80F5FA83-930B318E at 130.244.188.14
From: sip:0856264000 at 130.244.188.14
To: sip:0856204081 at 130.244.190.42
 0(13212) Call from gateway
 0(13212) Routeblock 3 - To customer?
 0(13212) Call to customer: Test
 0(13212) Replyroute 1
 0(13212) Redirect prohibited


This call generates no accounting (not even with setflag(1) at the top of 
the route block)

I've managed to trigger the  'Redirect prohibited' message by using 
onreply_route[] but I find no way of canceling the request there.

What I want is to be able to either disallow 3xx responses completly or 
by selectivly cancelling them in onreply_route.

Another question, my ser-users archive just broke and I haven't been able 
to do much searching, what's the best way today to handle several pstn 
gateways and loadbalace between them for outgoing calls?

Best regards,

Thomas Björklund