Xine - issue #4 - Phile 112

eZine lover (@eZine)

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Xine

 · 6 months ago

 
                                        /-----------------------------\ 
                                        | Xine - issue #4 - Phile 112 | 
                                        \-----------------------------/ 

#!/usr/bin/perl 

# scappa, b0z0/iKX 
# a tcp service scanner, for the perl script series. 
# scans a given set of internet hosts (range given by IP) for a given 
# service version at a port, basing on a given scanning string (could be  
# a regexp even).  
# just written becoz someone asked me to do so. 

use Socket; 
require "getopts.pl"; 

::Getopts('b:e:t:s:p:'); 
# -b beginning IP address (either X.Y.Z.K or X.Y.Z. or X.Y. or X.) 
#    if you leave one or more of the IP address bytes null then they will 
#    be simply replaced with a zero value (1 for the last byte), that is  
#    beginning of that class 
# -e ending IP address (either X.Y.Z.J or X.Y.Z. or X.Y. or X.) 
#    if you leave one or more of the IP address bytes null then they will 
#    be simply replaced with a 255 value (254 for the last byte), that is  
#    end of that class 
# -p port where to search for service 
# -t timeout when waiting for the connection 
# -s search string to wait for (could be also a regular expression). 
# 
# Usage samples: 
#   scan a given range for wingates 
#     ./scappa -b 194.35.54.36 -e 194.35.54.69 -p 23 -s "Wingate>" 
#   scan a C class for wingates 
#     ./scappa -b 194.35.54 -p 23 -s "Wingate>" 
#   scan a B class for wingates 
#     ./scappa -b 194.35 -p 23 -s "Wingate>" 

if (!($opt_b)) { 
 print "Not enough parameters, read the script for infos\n"; 
 exit(); 
} 

($from_1,$from_2,$from_3,$from_4)=split(/\./,$opt_b); 

if (!($opt_e)) { 
  $opt_e=join(".",$from_1,$from_2,$from_3); 
} 
($to_1,$to_2,$to_3,$to_4)=split(/\./,$opt_e); 

$wait_to= $opt_t; 
$wait_to=5 if (!($wait_to)); 

$search_string=$opt_s; 
$search_string='Wingate>' if (!($search_string)); 

$porta=$opt_p; 
$porta=23 if (!($porta)); 

foreach $exam ($from_1,$from_2,$from_3,$from_4) { 
 $exam=0 if (($exam eq '') || (!($exam =~(/\d{1,3}/))) || ($exam>254)); 
} 
$from_4++ if $from_4==0; 

foreach $exam ($to_1,$to_2,$to_3,$to_4) { 
 $exam=255 if (($exam eq '') || (!($exam =~(/\d{1,3}/))) || ($exam>254)); 
} 
if (!($to_4==255)) { $to_4++;} else 
{ 
   $to_3++;$to_4=1; 
   if ($to_3>255) { $to_2++;$to_3=0;} 
   if ($to_2>255) { $from_1++;$to_2=0;} 
} 

$|=1; 

$AF_INET = 2; 
$SOCK_STREAM = 1; # should be 2 for SunOS 
$sockaddr = 'S n a4 x8'; 

chop ($hostname = `hostname `); 
($name, $aliases, $type, $len, $thisaddr) = gethostbyname ($hostname); 
($name, $aliases, $proto) = getprotobyname ('tcp'); 

$outta = pack ($sockaddr, $AF_INET, 0, $thisaddr); 

while (!(($from_1==$to_1) && ($from_2==$to_2) && 
         ($from_3==$to_3) && ($from_4==$to_4))) { 

  socket (OUT, $AF_INET, $SOCK_STREAM, $proto) || die "socket: $!"; 
  bind (OUT, $outta) || die "bind: $!"; 
  $string=''; 

  $to=join('.',$from_1,$from_2,$from_3,$from_4); 
  $targetaddr=pack('C4',$from_1,$from_2,$from_3,$from_4); 
  $that = pack ($sockaddr, $AF_INET, $porta, $targetaddr); 

  print "$to: "; 
  if (connect (OUT, $that)) 
   { 
    select (OUT); 
    $|=1; 
    select (STDOUT); 

    $SIG{'ALRM'}= sub{die}; 
    alarm ($wait_to); 
    eval << 'EOW'; 
    while (read (OUT, $buf, 1)) { $string.=$buf; } 
EOW 
    alarm (0); 
    print "Requested service "; 
    $_=$string; 
    if (!(/$search_string/)) { print "not ";} 
    print "present.\n"; 
   } 
  else 
   { 
    print "Can't connect: $!\n"; 
   } 
   close(OUT); 
   $from_4++; 
   if ($from_4>254) { $from_3++;$from_4=1;} 
   if ($from_3>255) { $from_2++;$from_3=0;} 
   if ($from_2>255) { $from_1++;$from_2=0;} 
}