Log host identifier

[Narcis Garcia]

Okay, I've solved with your example, dhcp-eval manpage, and Glenn
Satchell's AA-01039 answer in ISC*:*

on commit {
        if static {
                set KnownHost = pick-first-value(host-decl-name, "(none)");
        } else {
                set KnownHost = "(dynamic)";
        }
        set MacString = concat(
                suffix(concat ("0", binary-to-ascii (16, 8, "",
substring(hardware,1,1))),2), ":",
                suffix(concat ("0", binary-to-ascii (16, 8, "",
substring(hardware,2,1))),2), ":",
                suffix(concat ("0", binary-to-ascii (16, 8, "",
substring(hardware,3,1))),2), ":",
                suffix(concat ("0", binary-to-ascii (16, 8, "",
substring(hardware,4,1))),2), ":",
                suffix(concat ("0", binary-to-ascii (16, 8, "",
substring(hardware,5,1))),2), ":",
                suffix(concat ("0", binary-to-ascii (16, 8, "",
substring(hardware,6,1))),2)
        );

        log(info, concat(
                "KnownHost:", KnownHost
                ," ClientHostname:", pick-first-value(option
fqdn.hostname, option host-name, config-option server.ddns-hostname,
"(none)")
                ," MAC:", MacString
                ," leased-address:", pick-first-value(
binary-to-ascii(10, 8, ".", leased-address), "(none)")
                ," lease-time:",
pick-first-value(binary-to-ascii(10,32,"",encode-int(lease-time,32)),
"(none)")
        ));
}


El 19/10/17 a les 09:27, Narcis Garcia ha escrit:
> Thank you;
>
> Is there some way to get the label of the host definition instead of
> having to add a hostname/fqdn/identifier to each host?
>
> (such as "printer_1" here)
>
> host printer_1 {
> 	hardware ethernet 00:11:22:33:44:55;
> 	fixed-address 172.16.20.201;
> }
>
>
> El 19/10/17 a les 09:12, Bill Shirley ha escrit:
>> Add logging to your dhcpd.conf.  Here is what I use:
>> on commit {
>>     if static {
>>         set is-static = " --> STATIC";
>>
>>         option dhcp-renewal-time    = encode-int(43200 / 2, 32);    #
>> 43200 = 12 hours
>>         option dhcp-rebinding-time    = encode-int(43200 * 7 / 8, 32);
>>         ddns-ttl            = encode-int((43200 / 2) + 1, 32);
>>     } else {
>>         set is-static = "";
>>
>>         option dhcp-renewal-time    = encode-int(lease-time / 2, 32);
>>         option dhcp-rebinding-time    = encode-int(lease-time * 7 / 8, 32);
>>         ddns-ttl            = encode-int((lease-time / 2) + 1, 32);
>>     }
>>
>>     log (   info,
>>         concat (
>>             "Host:", pick-first-value(option fqdn.hostname, option
>> host-name, "(none)"), "=>", pick-first-value(config-option
>> server.ddns-hostname, "(none)")
>>
>>             ,"  VendorId:", pick-first-value(option
>> vendor-class-identifier, "(none)")
>>
>>             ,"  Lease:",
>> pick-first-value(binary-to-ascii(10,32,"",encode-int(lease-time,32)),
>> "(none)")
>>             ,"  Renewal:", pick-first-value(binary-to-ascii(10, 32, "",
>> config-option dhcp-renewal-time), "(none)")
>>             ,"  Rebind:", pick-first-value(binary-to-ascii(10, 32, "",
>> config-option dhcp-rebinding-time), "(none)")
>>
>>             ,"  TTL:", pick-first-value(binary-to-ascii(10, 32, "",
>> config-option server.ddns-ttl), "(none)")
>>
>>             ,"  GIaddr:", pick-first-value(binary-to-ascii(10, 8, ".",
>> packet(24,4)), "(none)")
>>             , is-static
>>         )
>>     );
>> }
>>
>> Bill
>>
>>
>> On 10/19/2017 3:00 AM, Narcis Garcia wrote:
>>> isc-dhcp-server is currently logging in my system:
>>> DHCPDISCOVER from 11:22:33:44:55:66 via eth0
>>> DHCPOFFER on 172.16.20.201 to 11:22:33:44:55:66 via eth0
>>> DHCPREQUEST for 172.16.20.201 from 11:22:33:44:55:66 via eth0
>>> DHCPACK on 172.16.20.201 to 11:22:33:44:55:66 via eth0
>>>
>>> How can I make the service logs some name about that known client? (such
>>> as "printer_1")
>>>
>>> Thanks.
>>> _______________________________________________
>>> dhcp-users mailing list
>>> dhcp-users at lists.isc.org
>>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>>
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
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