[Ddclient-support] Avoiding update when the IP has not changed

[Roberto P. <ik...@gm...>]

Hi all,

   I have seen on the syslog that ddclient write a warning

WARNING: updating ....  nochg: No update required; unnecessary attempts 
to change to the current address are considered abusive

   So checking the code (from my little understanding) it seems that the 
update procedure will happen also when the IP
   hasn't changed.
   I have then added a little piece of code (just for the no-ip section 
but similar can be done on dyndns section)
   This little piece of code check the ip for the host to be updated 
against the one obtained by Google dns server.
   If the wanted ip address is same of the one obtained from google DNS 
server 8.8.8.8 then a "SUCCESS" message
   will be printed and remain part of the code will be skipped for that 
host.
   Here my diff of original client and my mod

   I don't know if this feature is already present on the code and was 
just me that didn't realyze that.

      If not, i hope someone will do similar change on the mainained 
code adding same also on dyndns part.

          Cheers

     Roberto

=========================================
diff /usr/sbin/ddclient.orig /usr/sbin/ddclient
2465a2466,2473
 >         my $host_ip = `host $h 8.8.8.8|grep $h|sed 's/.*has address //'`;
 >
 >       if ( $ip == $host_ip )
 >       {
 >     success("Host already updated %s: IP address is %s was %s", $h, 
$ip, $host_ip);
 >       }
 >       else
 >       {
2537a2546
 >     }