3
# Prints info on all smb responding machines on a subnet.
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# This script needs to be run on a machine without nmbd running and be
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# run as root to get correct info from WIN95 clients.
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# findsmb [subnet broadcast address]
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# with no agrument it will list machines on the current subnet
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# There will be a "+" in front of the workgroup name for machines that are
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# local master browsers for that workgroup. There will be an "*" in front
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# of the workgroup name for machines that are the domain master browser for
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$SAMBABIN = "/usr/samba/bin";
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for ($i = 0; $i < 2; $i++) { # test for -d option and broadcast address
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sub ipsort # do numeric sort on last field of IP address
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# look for all machines that respond to a name lookup
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open(NMBLOOKUP,"$SAMBABIN/nmblookup $BCAST '*'|") ||
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die("Can't run nmblookup '*'.\n");
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# get rid of all lines that are not a response IP address,
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# strip everything but IP address and sort by last field in address
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@ipaddrs = sort ipsort grep(s/ \*<00>.*$//,<NMBLOOKUP>);
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print "\nIP ADDR NETBIOS NAME WORKGROUP/OS/VERSION $BCAST\n";
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print "---------------------------------------------------------------------\n";
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foreach $ip (@ipaddrs) # loop through each IP address found
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$ip =~ s/\n//; # strip newline from IP address
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# find the netbios names registered by each machine
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open(NMBLOOKUP,"$SAMBABIN/nmblookup -r -A $ip|") ||
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die("Can't get nmb name list.\n");
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@nmblookup = <NMBLOOKUP>;
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# get the first <00> name
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@name = grep(/<00> - /,@nmblookup);
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if ($_) { # we have a netbios name
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if (/GROUP/) { # is it a group name
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($name, $aliases, $type, $length, @addresses) =
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gethostbyaddr(pack('C4',split('\.',$ip)),2);
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if (! $name) { # could not get name
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$name = "unknown nis name";
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/(.{1,15})\s+<00>\s+/;
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# do an smbclient command on the netbios name.
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open(SMB,"$SAMBABIN/smbclient -N -L $name -I $ip -U% |") ||
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die("Can't do smbclient command.\n");
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if ($DEBUG) { # if -d flag print results of nmblookup and smbclient
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print "===============================================================\n";
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# look for the OS= string
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@info = grep(/OS=/,@smb);
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if ($_) { # we found response
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s/.*Domain=|OS=|Server=|\n//g; # strip out descriptions to make line shorter
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} else { # no OS= string in response (WIN95 client)
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# for WIN95 clients get workgroup name from nmblookup response
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@name = grep(/<00> - <GROUP>/,@nmblookup);
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/(.{1,15})\s+<00>\s+/;
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$_ = "Unknown Workgroup";
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# see if machine registered a local master browser name
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if (grep(/<1d>/,@nmblookup)) {
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$master = '+'; # indicate local master browser
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if (grep(/<1b>/,@nmblookup)) { # how about domain master browser?
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$master = '*'; # indicate domain master browser
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$master = ' '; # not a browse master
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# line up info in 3 columns
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print "$ip".' 'x(16-length($ip))."$name".' 'x(14-length($name))."$master"."$_\n";
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} else { # no netbios name found
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# try getting the host name
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($name, $aliases, $type, $length, @addresses) =
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gethostbyaddr(pack('C4',split('\.',$ip)),2);
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if (! $name) { # could not get name
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$name = "unknown nis name";
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if ($DEBUG) { # if -d flag print results of nmblookup
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print "===============================================================\n";
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print "$ip".' 'x(16-length($ip))."$name\n";