[OpenSER-Users] Wrong To: Field In SIP Packet when Sending to PSTN GW

Ali Jawad ali.jawad at splendor.net
Fri Feb 1 13:54:30 CET 2008


Hi All 

I am using OpenSER as a proxy to make outbound calls my config is very
simple if the number dialled is not an openser account route it to the
PSTN gw. 


if(does_uri_exist()){ 
# local uri does exist, is probably a user. 
# lookup location 
if(lookup("location")){ 
route(1); 
return; 
} 
} else { 
# probably a call to pstn.... 
route(2); 
return; 
} 
and 
route[2] 
{ 
# pstn handling, simply route out to pstn. 
sethostport("xx.xx.xx.xx:5060"); 
route(1); 
} 



The problem is that once the SIP packet arrives at the PSTN GW it does
NOT have the correct TO: set. Therefore the call does not get routed .

In the example below TO: is sip:calledNumber at myOpenserDomain instead of
sip:calledNumber at PSTN.GATEWAY.IP.IP 

Caller: ali [!at] jabber.splendor.net (replace the [!at] with a @) 
Callee:    009613041708 
OpenSerDomain: jabber.splendor.net 


U +0.289348 PSTN.GW.IP.IP:5060 -> 193.237.226.252:5060 
SIP/2.0 404 Not Found . 
Via: SIP/2.0/UDP 193.237.226.252;rport;branch=z9hG4bK6828.10c0315.0. 
Via: SIP/2.0/UDP
192.168.0.176:65068;received=193.227.186.146;branch=z9hG4bK-d87543-be62c
55d821be10d-1--d87543-;rport=65068. 
Record-Route: <sip:193.237.226.252;lr=on>. 
From: "ssafass" <sip:ali at jabber.splendor.net>;tag=f36d6608. 
To: "009613041705"
<sip:009613041705 at jabber.splendor.net>;tag=GR52RWG346-34. 
Call-ID: 0942e159a72eab40ZmViZWY4YTVlOTRlOGJmZTM5ZDdkZGJiZjFmMTlmMjk.. 
CSeq: 1 INVITE. 
Contact: "0000" <sip:PSTN.GW.IP.IP:5060>. 
User-Agent: eyeBeam release 1003s stamp 31159. 
Content-Length: 0. 

I did a siptrace on the interface of the SIP proxy 

http://pastebin.com/d56426d63
<http://www.voipuser.org/ship_to.php?url=http://pastebin.com/d56426d63>


This is my config: 

http://pastebin.com/m128ca16e
<http://www.voipuser.org/ship_to.php?url=http://pastebin.com/m128ca16e> 

 

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