SV: Hostname and DNS

[Lars Jacobsen]

> Glenn Satchell wrote 
> Something like this in an appropriate scope:
> 
>   ddns-hostname = option agent.circuit-id;
> 
> or use pick-first-value() in case the circuit-id is not set:
> 
>   ddns-hostname = pick-first-value(
>         option agent.circuit-id,
>         option host-name,
>         binary-to-ascii (16, 8, "-", substring (hardware, 1, 6)) );
> 
> This is from the dhcpd.conf man page:
> 
> SETTING PARAMETER VALUES USING EXPRESSIONS
>      Sometimes it's helpful to be able to set the value of a DHCP
>      server  parameter  based  on  some value that the client has
>      sent.   To do this, you can use expression evaluation.   The
>      dhcp-eval(5) manual page describes how to write expressions.
>      To assign the result of an evaluation to an  option,  define
>      the option as follows:
> 
>        my-parameter = expression ;
> 
>      For example:
> 
>        ddns-hostname = binary-to-ascii (16, 8, "-",
>                                         substring (hardware, 1, 6));


Guess it's just that obvious.  
That's because I had a few other situations where it was not
possible/simple to assign values to other parameters based on
agent.circuit-id.
And I didn't read the last page of the man, only those around DDNS ;-)
Ill try tomorrow.

Thanks
/Lars