modify SIP contact header param

Hi,

 

 

we are using a location server which basically gets SIP invites from a SIP proxy then sends 302 redirect messages.

 

 

I have been trying to modify the IP address parameter in the Contact header which is in the 302 message. this IP address will vary, but I want to set it statically

 

 

the contact header will have a URI in the format of number xxxxxxxxxxxxx@172.24.103.10. since this is my first irule. I'm struggling.

 

 

here is what I've been trying with no success.

 

 

when SIP_RESPONSE {

 

set contact [ SIP::header Contact ]

 

set telephone 0

 

set bind 0

 

regexp {[0-9]{13}} $contact telephone

 

regexp {[0-9]{8}} $contact bind

 

SIP::header insert [format \"$bind\"

 

 

the header just returns a 0 or a 1... maybe I should try the -inline switch with regexp???