RE: [EXT] Convert an integer to a MAC address in unlang / expr

27 Aug 2020

      Thanks Brian and Alan for your advice.

If I just perform the mask transform on the last octet this works but of
course it returns the result as an int, so I can't find any built in
function to get that back to hex.

This is what I've ended up with; please let me know if you feel there is a
better/cleaner way without needing the IF statement

update control {
    &Tmp-String-1 := "%{1}-%{2}-%{3}-%{4}-%{5}"
    &Tmp-String-2 := "%{expr: 0x%{6} & 0xC0}"
}
if (&control:Tmp-String-2 && &control:Tmp-String-2 != "") {
    if (&control:Tmp-String-2 == "00") {
        update control {
                &Tmp-String-2 := "00"
        }
    }
    if (&control:Tmp-String-2 == "64") {
        update control {
                &Tmp-String-2 := "40"
        }
    }
    if (&control:Tmp-String-2 == "128") {
        update control {
                &Tmp-String-2 := "80"
        }
    }
    if (&control:Tmp-String-2 == "192") {
        update control {
                &Tmp-String-2 := "C0"
        }
    }

    update request {
        &Called-Station-Id :=
"%{control:Tmp-String-1}-%{control:Tmp-String-2}"
    }
}

Thanks,

James

RE: [EXT] Convert an integer to a MAC address in unlang / expr

James Wood