dhcpd 4.2 no longer knows ns-update operator

[Jiri Popelka]

Hi,

the code for parsing ns-update operator is not compiled by default because
it's (common/parse.c:4042) in
#if defined(NSUPDATE_OLD)
#endif
and NSUPDATE_OLD is not defined by default.

Can somebody from ISC confirm that parsing of ns-update operator was 
removed intentionally ?

Thanks.

If that's a bug (you had wanted to remove only parsing or dns-update and 
dns-delete but not ns-update),
then the fix is easy (see attached patch).

--
Jiri

On 02/01/2012 11:21 AM, Eddie Lania wrote:
> Description of problem: I am trying this in my dhcpd.conf:
>
> # start here
> option oe-key     code 159 = string;
> option oe-gateway code 160 = ip-address;
>
> on commit {
>    if (not static and
>        ((config-option server.ddns-updates = null) or
>         (config-option server.ddns-updates != 0))) {
>
>        if exists oe-key {
>          set ddns-rev-name =
>             concat (binary-to-ascii (10, 8, ".",
>                                       reverse (1, leased-address)), ".",
>                      pick (config-option server.ddns-rev-domainname,
>                            "in-addr.arpa."));
>
>         set full-oe-key = option oe-key;
>
>         switch (ns-update (delete (IN, 25, ddns-rev-name, null),
>                             add (IN, 25, ddns-rev-name, full-oe-key,
>                                 lease-time / 2)))
>         {
>         default:
>           unset ddns-rev-name;
>           break;
>         case NOERROR:
>           on release or expiry {
>             switch (ns-update (delete (IN, 25, ddns-rev-name, null))) {
>             case NOERROR:
>               unset ddns-rev-name;
>               break;
>             }
>           }
>         }
>       }
>    }
> }
> # stop here
>
> My goal is to clean up dns records for released or expired dhcp leases.
>
> The script above was found on the internet.
>
> The problem is that dhcpd will not start with this code but fails with a
> message:
>
>   /etc/dhcp/dhcpd.conf line 131: expecting data or numeric expression.
>          switch (ns-update
>                  ^
>   Configuration file errors encountered -- exiting
>
>
> I cannot find anything on the net how this should be solved.
> Is it a bug?

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