addding "CID" and leased address to logging

[raz khan]

Many thanks Glenn.

I have been trying to play around, but can't seem to get the CID value returned by the NAS back to DHCP server.

P, Request from 68:ef:bd:4a:fa:18, length: 283, xid:0x349c, flags: [none] (0x0000)
          Client IP: xx.xx.xx.xx
          Gateway IP: xx.xx.xx.xx
          Client Ethernet Address: xx.xx.xx.xx.xx.xx
          Vendor-rfc1048:
            DHCP:REQUEST
            MSZ:1152
            CID:"bob at foobar"
            LT:3600
            PR:SM+NS+DN+WNS

How can I extract this CID information in the dhcpd log file using the concat method?

Thanks
RK
> Date: Fri, 24 Aug 2012 21:15:20 +1000
> Subject: RE: addding "CID" and leased address to logging
> From: glenn.satchell at uniq.com.au
> To: dhcp-users at lists.isc.org
> 
> man dhcp-eval:
> 
>      log (priority, data-expr)
> 
>        Logging statements may be used to send information to  the
>        standard  logging  channels.  A logging statement includes
>        an optional priority (fatal, error, info, or debug), and a
>        data expression.
> 
>        Logging statements take  only  a  single  data  expression
>        argument,  so  if you want to output multiple data values,
>        you will need to use the concat  operator  to  concatenate
>        them.
> 
> You need to ensure that anything concatenated is not a null string,
> otherwise the whole concatenated string is null.
> 
> The logging destination is done through the log-facility command (see
> dhcpd.conf(5) and subsequently syslog.conf.
> 
> regards,
> -glenn
> 
> On Fri, August 24, 2012 6:35 pm, raz khan wrote:
> > Many thanks Niall.I will try the suggested method. However I would like to
> > find out if there is any documentation about using "info concat(.." in the
> > dhcpd.conf file? I have checked various resources, but nothing mentioned.
> > Can anyone point me to the right source?
> > ThanksRK
> >
> >> Subject: Re: addding "CID" and leased address to logging
> >> From: Niall.oReilly at ucd.ie
> >> Date: Wed, 22 Aug 2012 17:41:49 +0100
> >> To: dhcp-users at lists.isc.org
> >>
> >>
> >> On 22 Aug 2012, at 17:31, raz khan wrote:
> >>
> >> > This information is passed on to the lease file but not to the default
> >> log file.
> >>
> >> The kind of thing you seem to need is discussed in the archives.  Try
> >> https://lists.isc.org/pipermail/dhcp-users/2008-November/007847.html
> >>
> >> Niall O'Reilly
> >>
> >>
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> 
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