How to match part of agent's vendor specific suboption

[Eduardo Ferreira Juca de Castro]

Thanks Glenn,

But I need to match a vendor specific suboption. The ones you listed isn't
in the packet.
I'll handle just one vendor dhcp relay though, so I know the order the
suboptions are packed.
If I can't use the global agent how to get access to the vendor specific
suboptions?

[]
Eduardo F. Jucá de Castro
CPqD - Gerência de Serviços e Aplicações Multimídia
Tel.: +55 19 3705-7238 / Fax: +55 19 3705-5868
Cel.: +55 19 9603-4624
jucah at cpqd.com.br
www.cpqd.com.br



2011/10/9 Glenn Satchell <glenn.satchell at uniq.com.au>

> 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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