Dynamic 1:1 SNAT irule

cont...

loop through subnet until octet3 has reached it's maximum allocated value 
    while {$::oct3 <= $static::oct3end} {
        set ip 217.39.$::oct3.$::oct4

        if { [table lookup -notouch -subtable "DynNatAddreses" $ip] eq "" } {

            log local0. "Free IP: $ip found added to clientDynNat table"

            reserve the Free IP
            table add -subtable "DynNatAddreses" $ip [IP::client_addr] $static::timeout
            allocate the Free IP as client SNAT address
            table add -subtable "ClientDynNat" [IP::client_addr] $ip $static::timeout

        debugging
        if {$static::debug} {
            log local0. "table lookup in DynNatAddress for $ip: [table lookup -notouch -subtable "DynNatAddreses" $ip]"
            log local0. "table remaining ClientDynNat for [IP::client_addr]: [table timeout -subtable "ClientDynNat" -remaining [IP::client_addr]]"
            log local0. "table timeout DynNatAddreses for $ip: [table timeout -subtable "DynNatAddreses" -remaining $ip]"
        }   
            SNAT the client to the free IP
            snat $ip
             break the loop - found and allocated a address so no point in cycling through rest of Pool of IP's
            break           
        }
        increment the last octect of pool
        incr ::oct4
        if last octect has reached the end of the range increment next octet of IP and start looping through again
        if {$::oct4 > $static::oct4end} {
            incr ::oct3
            set ::oct4 0
        }
    }   
}



}