Bug 786357 - dhcpd 4.2 no longer knows ns-update operator
dhcpd 4.2 no longer knows ns-update operator
Product: Fedora
Classification: Fedora
Component: dhcp (Show other bugs)
Unspecified Unspecified
unspecified Severity high
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Assigned To: Jiri Popelka
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-02-01 03:01 EST by Eddie Lania
Modified: 2012-02-04 02:44 EST (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2012-02-04 02:43:06 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Eddie Lania 2012-02-01 03:01:29 EST
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,

       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)))
         unset ddns-rev-name;
       case NOERROR:
         on release or expiry {
           switch (ns-update (delete (IN, 25, ddns-rev-name, null))) {
           case NOERROR:
             unset ddns-rev-name;
# 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 messge:

 /etc/dhcp/dhcpd.conf line 131: expecting data or numeric expression.
        switch (ns-update
 Configuration file errors encountered -- exiting

I can not find anything on the net how this should be solved.
Is it a bug?

Version-Release number of selected component (if applicable):


How reproducible: Always

Steps to Reproduce:
1. Put code like above in dhcpd.conf
2. Restart dhcpd.service
Actual results:

 /etc/dhcp/dhcpd.conf line 131: expecting data or numeric expression.
        switch (ns-update
 Configuration file errors encountered -- exiting

Expected results:

No such error

Additional info:
Comment 1 Jiri Popelka 2012-02-01 04:23:12 EST
I don't want to sound harsh, but you know that this is more a question that bug report and therefore should be asked on dhcp-users@lists.isc.org and not here.
You'll get a more sophisticated answers there cause I'm just a devel and not skilled dhcp user/admin.
Comment 2 Eddie Lania 2012-02-02 07:39:12 EST
I asked on dhcp-users@lists.isc.org and have got no answer.
How do you know for sure it's a question and not a bug?
Comment 3 Jiri Popelka 2012-02-04 02:43:06 EST
Closing per
There's nothing I can do for you here, sorry.

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