[KLUG Members] Samba wins-to-dns

[Peter Buxton]

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On Tue, Aug 20, 2002 at 01:44:14AM -0400, Peter Buxton wrote:

> Also, the script doesn't seem to use the add/refresh/delete commands
> given to it by Samba, either. Hmmmm.

Okay, this is undoubtedly another stupid nsupdate trick. How do I tell
nsupdate to only give updates to localhost? "server localhost" sure as
heck wasn't it. :-(

TIA, Adam,

Peter

#!/bin/bash

PATH=3D"/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin"
DOMAIN=3D"caresswm.org."
TTL=3D"3600"   # The DNS TTL to give the records (in seconds)
USEFUL_TYPES=3D"03"  # NETBIOS name types that we want to create DNS=20
		   # records for. 20 server, 00 workstation, 03 user=20
		   # 1b workgroup? 1c server?

NSUPDATE=3D`which nsupdate` || {
   echo "Cannot find nsupdate in \$PATH $PATH." 1>&2
   exit 1
}

if [ $# -lt 4 ]
   then
   echo -e "Usage: $0 op name type ttl [ip_addr ...]\n   op is one of" \
   "add, refresh, delete\n   name is the NETBIOS name\n   type is the" \
   "NETBIOS name type\n   ttl is the NETBIOS time to live\n   ip_addr's" \
   "are the remaining IP addresses for this name" 1>&2
   exit 1
fi

function nbdel_fromdns {
   {
   for i in `dig +short $NAME.$DOMAIN`
      do REVVED=3D""
      for d in 4 3 2 1
         do REVVED=3D${REVVED}`echo $i | cut -f$d -d.`.
      done
      echo "update delete ${REVVED}in-addr.arpa"
   done
   echo -e "update delete $NAME.$DOMAIN\n"
   } 2> /dev/null | $NSUPDATE > /dev/null 2>&1
   return 0
}

function nbadd_todns {
   {
   for i in $IP_ADDRS
      do echo "update delete $NAME.$DOMAIN"
      echo "update add $NAME.$DOMAIN $TTL A $i"
      REVVED=3D""
      for d in 4 3 2 1
         do REVVED=3D${REVVED}`echo $i | cut -f$d -d.`.
      done
      echo "update delete ${REVVED}in-addr.arpa"
      echo "update add ${REVVED}in-addr.arpa $TTL IN PTR $NAME.$DOMAIN"
   done
   echo
   } 2> /dev/null | $NSUPDATE > /dev/null 2>&1
   return 0
}

OP=3D$1 ; NAME=3D$2 ; TYPE=3D$3 ; WINS_TTL=3D$4
shift 4
IP_ADDRS=3D"$@"

do_update=3D0
for i in $USEFUL_TYPES
   do
   if [ "$TYPE" =3D "$i" ]
      then
      if [ "$OP" =3D "delete" ]
         then
         nbdel_fromdns
      else
         nbadd_todns
      fi
   fi
done

exit 0

--=20
http://www.killdevil.org/~peter (/gpg.html)
on R.Fripp, "Rock's gain of an eccentric, idiosyncratic
musician is industry's loss of a great economist."

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