/usr/bin/topmasq is in tcpquota 1.6.15-13.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | #!/usr/bin/perl -w
# $Header: /us/usr/lib/tcpquota/cvs/root/tcpquota/topmasq,v 1.11 1998/04/17 07:57:38 turbo Exp $
#
# $Log: topmasq,v $
# Revision 1.11 1998/04/17 07:57:38 turbo
# Fixed a bug in the loop, which cycles through the masquerading
# entries...
#
# Revision 1.10 1998/01/23 15:49:24 turbo
# Make sure we split the correct variable, instead of STDIN, forgot that when
# I rewrote it to be compatible with newer perl which does not like to do
# 'while(<FILEHANDLE>)'...
#
# Revision 1.9 1998/01/16 15:10:04 turbo
# Perl changed the way it handled file handles... When we cyckle through the
# file, make sure we only do that while ! eof.
#
# Revision 1.8 1997/12/04 14:11:05 turbo
# Got the fetching of the IP address from the utmp file to work, updated
# the WHO variable and it's splitting accordingly...
#
# Revision 1.7 1997/11/26 21:56:42 turbo
# Forgot to include the utmp header file...
#
# Revision 1.6 1997/11/26 21:49:01 turbo
# We have the possibility to use a homemade function, 'get_online()', which
# returns the users online right now, instead of using '/usr/bin/who'...
#
# Revision 1.5 1997/11/26 21:29:57 turbo
# Removed a lot of config file variables, that could possibly confuse a new
# user/admin of the package... We asume that whoever chooses to install the
# package, use our default... If not, they can go in and change the stuff
# themselvs!!
#
# Revision 1.4 1997/11/19 20:42:00 turbo
# Cleaned up the output, not so much crap info...
#
# Revision 1.3 1997/11/19 19:57:45 turbo
# Instead of using '/sbin/ipfwadm -Ml' to get the hosts currently masqueraded,
# open the file '/proc/net/ip_masquerade', which contains the same information,
# only in raw mode... Might make the program a little faster, no overhead of
# starting an external program...
#
# Revision 1.2 1997/08/17 17:29:14 turbo
# * Moved some functions to the library file.
# * Deleted some variables, they exists in the config file.
# * Added the global config variables 'LANGUAGE' and 'MONEY_VALUE' in the
# config file...
# * Changed some hardcoded site specific entries, and language. We can´t
# release it if much of it is specific to CCW...
# * Made sure that all the script's understand '--help', '-h' and '?', just
# in case...
# * Some of the config file variables can be used by all the scripts, therefor
# made non-program specific ('TABLE=xxx', instead of 'tcpquotad.TABLE=xxx').
# * Fixed some calculation buggs in the admin program, and also more information
# in the menu.
#
#
require "/usr/lib/tcpquota/tcpquota.pl";
require "/usr/lib/tcpquota/utmp.ph";
# log period in seconds
$PERIOD = 5;
######################################################################
#
# main loop
#
while(1) {
my($line);
# Clear the screen.
system( 'clear' );
# Print out some leading text...
print "\nUser User from Masquerading host\n";
open(MASQUERADE, "/proc/net/ip_masquerade")
|| die "Could not open '/proc/net/ip_masquerade', $!";
<MASQUERADE>; # throw away first line
while(! eof(MASQUERADE) ) {
%WHO = ();
$line = <MASQUERADE>;
@a = split(' ', $line);
# $a[1] = source of masqueraded data (with port)
# $a[2] = destination of masqueraded data
$source = &find_fqdn(&hex_to_ip((split(':', $a[1]))[0]));
# Read from '/usr/bin/w'
%WHO = &get_online();
# Get the remote hostname...
$i = 0;
while($WHO{$i}) {
($user, $host, $dummy, $dummy) = split(' ', $WHO{$i});
if($host) {
# find if anyone is coming from source address
if( $host eq $source ) {
# the user and host is ok.
printf("%-10s %-30s %-30s\n", $user, $source, $host);
}
}
$i++;
}
}
close(<MASQUERADE>);
sleep $PERIOD;
}
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