Parsing options

[Erik Alapää]

On Thu, 16 Jun 2005, Ted Lemon wrote:

> On Jun 16, 2005, at 6:18 AM, Erik Alapää wrote:
> > What I need is a routine that
> > simply takes a raw dhcp_packet or a dhcp packet struct as defined in
> > includes/dhcpd.h and gets me lease time, circuit and remote id. Looks
> > like I will have to build one from scratch :(
> >
> Version 3.0 of the relay agent already has code in it to abstract out
> the relay agent information option.   You could trivially hack it to
> also abstract out the lease information.   Check out
> strip_relay_agent_options - just add more entries to the switch
> statement.   Bear in mind that the contents of the options are in
> network byte order and not aligned, and you need to sanity check them
> to avoid buffer overflows.
>
> The reason the option parsing code is so complicated is because it
> works both for generating options from configuration files on the
> server side and for dumping them into shell scripts on the client
> side - nothing so complicated is needed for the relay agent.   For
> completeness you might want to add support for the overload option,
> but you'll probably never need it.
>

Great, thanks for the info! I will modify the code to get the options
I need, or maybe have a look at the other code snippet that was
posted.

Regards,

--
Erik Alapää
Software Engineer M. Sc., Lic. Ind. Math.

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