How to match part of agent's vendor specific suboption

[Glenn Satchell]

See man dhcp-options, I think you need to specify one of

option agent.circuit-id
option agent.remote-id
option agent.DOCSIS-device-class
option agent.link-selection

You definitely need the "option" key word, otherwise it uses a variable
named "agent" which is probably null.

Using substring on the whole agent field may not extract it correctly, as
the order of packing in the sub options could vary.

regards,
-glenn

> I'm using a similar statement to match PXE clients (to differentiate from
> when installed systems boot - the PXE boot rom sends a specific client
> option, and we had out different settings to these clients... works on
> dhcp 3.0.x and 4.2.x (tested) - seems similar to what you want, it might
> help.. here's the config block (actual IP replaced with 1.2.3.4 in this
> example):
>
>
>
> class "PXE" {
>         match if substring(option vendor-class-identifier, 0, 9) =
> "PXEClient";
>         filename "pxelinux.0"
>         option vendor-class-identifier "PXEClient";
>         vendor-option-space PXE;
>         option PXE.mtftp-ip 0.0.0.0;
>         next-server 1.2.3.4;
> }
>
> sounds like you might need the 'option' keyword before 'agent' to match
> what you're looking for?
>
>
>
> ====================
>
> Scott Stone <scott_stone at trendmicro.com>
> Manager, DCS-RD
> Trend Micro, Inc. http://www.trendmicro.com
>
>
>
> From: dhcp-users-bounces+scott_stone=trendmicro.com at lists.isc.org
> [mailto:dhcp-users-bounces+scott_stone=trendmicro.com at lists.isc.org] On
> Behalf Of Eduardo Ferreira Juca de Castro
> Sent: Sunday, October 09, 2011 12:07 PM
> To: dhcp-users at lists.isc.org
> Subject: How to match part of agent's vendor specific suboption
>
>
>
> Hi,
>
>
>
> I need to assign addresses based on a ssid information carried on agent's
> (option 82) vendor specific suboption.
>
> Do do so I defined classes this way:
>
> class "myClass" {
>     match if substring(agent,60,5) = "SSID1";
> }
>
> and used it in pool statements but nothing happens.
>
> I also tried to log things to see waht are beeing decoded but again
> nothing happens.
>
> if option dhcp-message-type = 1 {
>
>     log(info,concat("option82-suboption9:
> ",binary-to-ascii(16,8,"",substring(agent,60,5))));
>
> }
>
>
>
> I'm using ISC DHCP 4.2.1.
>
> Anyone can help me with this?
>
>
>
> TIA
>
>
>
> Regards,
>
>
>
>
> Eduardo F. J. de Castro
>
> CPqD - Telecommunications and IT R&D Center
>
>
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