VMPS support

[Alan DeKok]

Phil Mayers wrote:

> The value of VQP-Error-Code may make a difference; the code in OpenVMPS
> seems to work like this:

  Do you have some sample "unlang" config we can add to the server examples?

>> What's the easiest way to get the MAC address out of these?
> 
> I used this in the end:
> 
> # the mac address can be in several places...
> if ("%{VMPS-Ethernet-Frame}" =~
> /0x............(..)(..)(..)(..)(..)(..).*/) {
>         update request {
>                 MyMac = "%{1}:%{2}:%{3}:%{4}:%{5}:%{6}"

  Wow... I guess that works, but wow.  It's been a while since I used
regular expressions to parse raw packets.

  Also, in 2.0.1, you don't need "%{..}" for VMPS-Ethernet-Frame.  You
can just put the bare name before the =~ operator.

  Alan DeKok.