irule to "NAT" SIP::uri

Hi all,

 

 

Need to perform destination NAT inside UDP/SIP messages

 

sip:XXX@vip --> sip:XXX@real

 

 

I am thinking of using the pseudo-code (being 10.1.2.3 the vip):

 

when SIP_REQUEST_SEND

 

set lbsa [LB::server addr] <--this will be the selected real

 

set su [SIP::uri]

 

set st [SIP::to]

 

SIP::header remove uri

 

SIP::header remove To

 

regsub {10.1.2.3} $su "$lbsa" su

 

regsub {10.1.2.3} $st "$lbsa" st

 

SIP::header insert uri $su

 

SIP::header insert To $st

 

 

 

The challenge is:

 

SIP::To header is well defined inside SIP header (eg. TO sip:XXX@vip).

 

However, SIP::uri is not so well defined (eg. INVITE\nsip:XXX@vip).

 

 

Can someone give me a direction ?

 

 

Regards,

 

Joao