packaging/RedHat/findsmb

   1 #!/usr/bin/perl
   2 #
   3 # Prints info on all smb responding machines on a subnet.
   4 # This script needs to be run on a machine without nmbd running and be
   5 # run as root to get correct info from WIN95 clients.
   6 #
   7 # syntax:
   8 #    findsmb [subnet broadcast address]
   9 #
  10 # with no agrument it will list machines on the current subnet
  11 #
  12 # There will be a "+" in front of the workgroup name for machines that are
  13 # local master browsers for that workgroup. There will be an "*" in front
  14 # of the workgroup name for machines that are the domain master browser for
  15 # that workgroup.
  16 #
  17
  18 $SAMBABIN = "/usr/bin";
  19
  20 for ($i = 0; $i < 2; $i++) {    # test for -d option and broadcast address
  21   $_ = shift;
  22   if (m/-d|-D/) {
  23     $DEBUG = 1;
  24   } else  {
  25     if ($_) {
  26       $BCAST = "-B $_";
  27     }
  28   }
  29 }
  30
  31 sub ipsort                      # do numeric sort on last field of IP address
  32 {
  33   @t1 = split(/\./,$a);
  34   @t2 = split(/\./,$b);
  35   @t1[3] <=> @t2[3];
  36 }
  37
  38 # look for all machines that respond to a name lookup
  39
  40 open(NMBLOOKUP,"$SAMBABIN/nmblookup $BCAST '*'|") ||
  41   die("Can't run nmblookup '*'.\n");
  42
  43 # get rid of all lines that are not a response IP address,
  44 # strip everything but IP address and sort by last field in address
  45
  46 @ipaddrs = sort ipsort grep(s/ \*<00>.*$//,<NMBLOOKUP>);
  47
  48 # print header info
  49
  50 print "\nIP ADDR         NETBIOS NAME   WORKGROUP/OS/VERSION $BCAST\n";
  51 print "---------------------------------------------------------------------\n";
  52
  53 foreach $ip (@ipaddrs)          # loop through each IP address found
  54 {
  55   $ip =~ s/\n//;                # strip newline from IP address
  56
  57 # find the netbios names registered by each machine
  58
  59   open(NMBLOOKUP,"$SAMBABIN/nmblookup -r -A $ip|") ||
  60         die("Can't get nmb name list.\n");
  61   @nmblookup = <NMBLOOKUP>;
  62   close NMBLOOKUP;
  63
  64 # get the first <00> name
  65
  66   @name = grep(/<00>/,@nmblookup);
  67   $_ = @name[0];
  68   if ($_) {                     # we have a netbios name
  69     if (/GROUP/) {              # is it a group name
  70         ($name, $aliases, $type, $length, @addresses) =
  71         gethostbyaddr(pack('C4',split('\.',$ip)),2);
  72         if (! $name) {                  # could not get name
  73             $name = "unknown nis name";
  74         }
  75     } else {
  76         /(\S+)/;
  77         $name = $1;
  78     }
  79
  80 # do an smbclient command on the netbios name.
  81
  82     open(SMB,"$SAMBABIN/smbclient -N -L $name -I $ip -U% |") ||
  83         die("Can't do smbclient command.\n");
  84     @smb = <SMB>;
  85     close SMB;
  86
  87     if ($DEBUG) {               # if -d flag print results of nmblookup and smbclient
  88       print "===============================================================\n";
  89       print @nmblookup;
  90       print @smb;
  91     }
  92
  93 # look for the OS= string
  94
  95     @info = grep(/OS=/,@smb);
  96     $_ = @info[0];
  97     if ($_) {                           # we found response
  98       s/Domain=|OS=|Server=|\n//g;      # strip out descriptions to make line shorter
  99
 100     } else {                            # no OS= string in response (WIN95 client)
 101
 102 # for WIN95 clients get workgroup name from nmblookup response
 103       @name = grep(/<00> - <GROUP>/,@nmblookup);
 104       $_ = @name[0];
 105       if ($_) {
 106         /(\S+)/;
 107         $_ = "[$1]";
 108       } else {
 109         $_ = "Unknown Workgroup";
 110       }
 111     }
 112
 113 # see if machine registered a local master browser name
 114     if (grep(/<1d>/,@nmblookup)) {
 115       $master = '+';                    # indicate local master browser
 116       if (grep(/<1b>/,@nmblookup)) {    # how about domain master browser?
 117         $master = '*';                  # indicate domain master browser
 118       }
 119     } else {
 120       $master = ' ';                    # not a browse master
 121     }
 122
 123 # line up info in 3 columns
 124
 125     print "$ip".' 'x(16-length($ip))."$name".' 'x(14-length($name))."$master"."$_\n";
 126
 127   } else {                              # no netbios name found
 128 # try getting the host name
 129     ($name, $aliases, $type, $length, @addresses) =
 130       gethostbyaddr(pack('C4',split('\.',$ip)),2);
 131     if (! $name) {                      # could not get name
 132       $name = "unknown nis name";
 133     }
 134     if ($DEBUG) {                       # if -d flag print results of nmblookup
 135       print "===============================================================\n";
 136       print @nmblookup;
 137     }
 138     print "$ip".' 'x(16-length($ip))."$name\n";
 139   }
 140 }
 141