basic iRule syntax

I have the following iRule. I want to also check for "[UDP::local_port] == 80". I would rather not nest my if statements. How can I evaluate clianet_addr and local_port in the same expression?

 

i.e. if { [class match [IP::client_addr] equals proxy_free] && [[UDP::local_port] == 80] }

 

when CLIENT_ACCEPTED {

 

if { [class match [IP::client_addr] equals proxy_free] } {

 

snat automap

 

} else {

 

snat none

 

}

 

}