| 1 | #!/usr/bin/perl -w
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| 2 |
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| 3 |
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| 4 | # IPv4 Calculator
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| 5 | # Copyright (C) Krischan Jodies 2000 - 2004
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| 6 | # krischan()jodies.de, http://jodies.de/ipcalc
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| 7 | #
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| 8 | # This program is free software; you can redistribute it and/or modify
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| 9 | # it under the terms of the GNU General Public License as published by
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| 10 | # the Free Software Foundation; either version 2 of the License, or
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| 11 | # (at your option) any later version.
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| 12 | #
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| 13 | # This program is distributed in the hope that it will be useful,
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| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | # GNU General Public License for more details.
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| 17 | #
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| 18 | # You should have received a copy of the GNU General Public License
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| 19 | # along with this program; if not, write to the Free Software
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| 20 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 21 |
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| 22 | use strict;
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| 23 |
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| 24 | my $version = '0.38';
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| 25 |
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| 26 | my @class = qw (0 8 16 24 4 5 5);
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| 27 |
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| 28 | my $quads_color = "\033[34m"; # dotted quads, blue
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| 29 | my $norml_color = "\033[m"; # normal, black
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| 30 | #my $binry_color = "\033[1m\033[46m\033[37m"; # binary, yellow
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| 31 | my $binry_color = "\033[37m"; # binary, yellow
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| 32 | my $mask_color = "\033[31m"; # netmask, red
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| 33 | my $class_color = "\033[35m"; # classbits, magenta
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| 34 | my $subnt_color = "\033[0m\033[32m"; # subnet bits, green
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| 35 | my $error_color = "\033[31m";
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| 36 | my $sfont = "";
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| 37 | my $break ="\n";
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| 38 |
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| 39 | my $color_old = "";
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| 40 | my $color_actual = "";
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| 41 |
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| 42 | my $opt_text = 1;
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| 43 | my $opt_html = 0;
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| 44 | my $opt_color = 0;
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| 45 | my $opt_print_bits = 1;
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| 46 | my $opt_print_only_class = 0;
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| 47 | my $opt_split = 0;
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| 48 | my $opt_deaggregate = 0;
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| 49 | my $opt_version = 0;
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| 50 | my $opt_help = 0;
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| 51 | my @opt_split_sizes;
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| 52 | my @arguments;
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| 53 | my $error = "";
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| 54 | my $thirtytwobits = 4294967295; # for masking bitwise not on 64 bit arch
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| 55 |
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| 56 | main();
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| 57 | exit;
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| 58 |
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| 59 | sub main
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| 60 | {
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| 61 | my $address = -1;
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| 62 | my $address2 = -1;
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| 63 | my $network = -1;
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| 64 | my $mask1 = -1;
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| 65 | my $mask2 = -1;
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| 66 |
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| 67 | if (! defined ($ARGV[0])) {
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| 68 | usage();
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| 69 | exit();
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| 70 | }
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| 71 |
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| 72 | @ARGV = getopts();
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| 73 |
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| 74 | if ($opt_help) {
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| 75 | help();
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| 76 | exit;
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| 77 | }
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| 78 |
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| 79 | if ($opt_version) {
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| 80 | print "$version\n";
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| 81 | exit;
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| 82 | }
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| 83 |
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| 84 | #print "opt_html $opt_html\n";
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| 85 | #print "opt_color $opt_color\n";
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| 86 | #print "opt_print_bits $opt_print_bits\n";
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| 87 | #print "opt_print_only_class $opt_print_only_class\n";
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| 88 | #print "opt_deaggregate $opt_deaggregate\n";
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| 89 |
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| 90 | if (! $opt_color) {
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| 91 | $quads_color = '';
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| 92 | $norml_color = '';
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| 93 | $binry_color = '';
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| 94 | $mask_color = '';
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| 95 | $class_color = '';
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| 96 | $subnt_color = '';
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| 97 | $sfont = '';
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| 98 | }
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| 99 |
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| 100 | if ($opt_html) {
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| 101 | $quads_color = '<font color="#0000ff">' ;
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| 102 | $norml_color = '<font color="#000000">';
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| 103 | $binry_color = '<font color="#909090">';
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| 104 | $mask_color = '<font color="#ff0000">';
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| 105 | $class_color = '<font color="#009900">';
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| 106 | $subnt_color = '<font color="#663366">';
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| 107 | $sfont = '</font>';
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| 108 | $break = "<br>";
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| 109 | #$private = "(<a href=\"http://www.ietf.org/rfc/rfc1918.txt\">Private Internet</a>)";
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| 110 | # print "<pre>\n";
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| 111 | print << 'EOF';
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| 112 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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| 113 | <html>
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| 114 | <head>
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| 115 | <meta HTTP-EQUIV="content-type" CONTENT="text/html; charset=UTF-8">
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| 116 | <title>Bla</title>
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| 117 | </head>
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| 118 | <body>
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| 119 | EOF
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| 120 | print "<!-- Version $version -->\n";
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| 121 | }
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| 122 |
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| 123 | # foreach (@arguments) {
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| 124 | # print "arguments: $_\n";
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| 125 | # }
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| 126 |
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| 127 | # foreach (@ARGV) {
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| 128 | # print "ARGV: $_\n";
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| 129 | # }
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| 130 |
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| 131 | # get base address
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| 132 | if (defined $ARGV[0]) {
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| 133 | $address = argton($ARGV[0],0);
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| 134 | }
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| 135 | if ($address == -1) {
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| 136 | $error .= "INVALID ADDRESS: $ARGV[0]\n";
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| 137 | $address = argton("192.168.1.1");
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| 138 | }
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| 139 |
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| 140 | # if deaggregate get last address
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| 141 | if ($opt_deaggregate) {
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| 142 | if (defined $ARGV[1]) {
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| 143 | $address2 = argton($ARGV[1],0);
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| 144 | }
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| 145 | if ($address2 == -1) {
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| 146 | $error .= "INVALID ADDRESS2: $ARGV[1]\n";
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| 147 | $address2 = argton("192.168.1.1");
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| 148 | }
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| 149 | }
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| 150 |
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| 151 | if ($opt_deaggregate) {
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| 152 | if ($error) {
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| 153 | print "$error\n";
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| 154 | }
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| 155 | print "deaggregate ".ntoa($address) . " - " . ntoa($address2)."\n";
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| 156 | deaggregate($address,$address2);
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| 157 | exit;
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| 158 | }
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| 159 |
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| 160 | # get netmasks
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| 161 | if (defined $ARGV[1]) {
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| 162 | $mask1 = argton($ARGV[1],1);
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| 163 | } else {
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| 164 | #get natural mask ***
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| 165 | $mask1 = argton(24);
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| 166 | }
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| 167 | if ($mask1 == -1) {
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| 168 | $error .= "INVALID MASK1: $ARGV[1]\n";
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| 169 | $mask1 = argton(24);
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| 170 | }
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| 171 |
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| 172 | if (defined $ARGV[2]) {
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| 173 | $mask2 = argton($ARGV[2],1);
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| 174 | } else {
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| 175 | $mask2 = $mask1;
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| 176 | }
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| 177 | if ($mask2 == -1) {
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| 178 | $error .= "INVALID MASK2: $ARGV[2]\n";
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| 179 | $mask2 = argton(24);
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| 180 | }
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| 181 |
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| 182 | if ($error) {
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| 183 | if ($opt_color) {
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| 184 | print set_color($error_color);
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| 185 | }
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| 186 | print "$error\n";
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| 187 | }
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| 188 |
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| 189 | # print "Address: ".ntoa($address)."\n";
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| 190 | # print "mask1: ($mask1) ".ntoa($mask1)."\n";
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| 191 | # print "mask2: ($mask2) ".ntoa($mask2)."\n";
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| 192 |
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| 193 | html('<table border="0" cellspacing="0" cellpadding="0">');
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| 194 | html("\n");
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| 195 | printline ("Address", $address ,$mask1,$mask1,1);
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| 196 | printline ("Netmask", $mask1 ,$mask1,$mask1);
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| 197 | printline ("Wildcard", ~$mask1 ,$mask1,$mask1);
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| 198 | html("<tr>\n");
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| 199 | html('<td colspan="3"><tt>');
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| 200 | print "=>";
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| 201 | html("</tt></td>\n");
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| 202 | html("</tr>\n");
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| 203 | print "\n";
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| 204 |
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| 205 | $network = $address & $mask1;
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| 206 | printnet($network,$mask1,$mask1);
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| 207 | html("</table>\n");
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| 208 | if ($opt_deaggregate) {
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| 209 | deaggregate();
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| 210 | }
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| 211 | if ($opt_split) {
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| 212 | split_network($network,$mask1,$mask2,@opt_split_sizes);
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| 213 | exit;
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| 214 | }
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| 215 | if ($mask1 < $mask2) {
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| 216 | print "Subnets after transition from /" . ntobitcountmask($mask1);
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| 217 | print " to /". ntobitcountmask($mask2) . "\n\n";
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| 218 | subnets($network,$mask1,$mask2);
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| 219 | }
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| 220 | if ($mask1 > $mask2) {
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| 221 | print "Supernet\n\n";
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| 222 | supernet($network,$mask1,$mask2);
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| 223 | }
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| 224 | if ($opt_html) {
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| 225 | print << 'EOF';
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| 226 | <p>
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| 227 | <a href="http://validator.w3.org/check/referer"><img border="0"
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| 228 | src="http://www.w3.org/Icons/valid-html401"
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| 229 | alt="Valid HTML 4.01!" height="31" width="88"></a>
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| 230 | </p>
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| 231 | EOF
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| 232 | }
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| 233 | exit;
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| 234 |
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| 235 | }
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| 236 |
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| 237 | # ---------------------------------------------------------------------
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| 238 |
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| 239 | sub end {
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| 240 | if ($opt_html) {
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| 241 | # print "\n</pre>\n";
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| 242 | print "<html>\n";
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| 243 | }
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| 244 | exit;
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| 245 | }
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| 246 |
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| 247 | sub supernet {
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| 248 | my ($network,$mask1,$mask2) = @_;
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| 249 | $network = $network & $mask2;
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| 250 | printline ("Netmask", $mask2 ,$mask2,$mask1,1);
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| 251 | printline ("Wildcard", ~$mask2 ,$mask2,$mask1);
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| 252 | print "\n";
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| 253 | printnet($network,$mask2,$mask1);
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| 254 | }
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| 255 |
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| 256 | sub subnets
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| 257 | {
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| 258 | my ($network,$mask1,$mask2) = @_;
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| 259 | my $subnet=0;
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| 260 | my $bitcountmask1 = ntobitcountmask($mask1);
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| 261 | my $bitcountmask2 = ntobitcountmask($mask2);
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| 262 |
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| 263 | html('<table border="0" cellspacing="0" cellpadding="0">');
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| 264 | html("\n");
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| 265 | printline ("Netmask", $mask2 ,$mask2,$mask1,1);
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| 266 | printline ("Wildcard", ~$mask2 ,$mask2,$mask1);
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| 267 | html("</table>\n");
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| 268 |
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| 269 | print "\n";
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| 270 |
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| 271 | for ($subnet=0; $subnet < (1 << ($bitcountmask2-$bitcountmask1)); $subnet++)
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| 272 | {
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| 273 | my $net = $network | ($subnet << (32-$bitcountmask2));
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| 274 | print " ". ($subnet+1) .".\n";
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| 275 | html('<table border="0" cellspacing="0" cellpadding="0">');
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| 276 | html("\n");
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| 277 | printnet($net,$mask2,$mask1);
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| 278 | html("</table>\n");
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| 279 | if ($subnet >= 1000) {
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| 280 | print "... stopped at 1000 subnets ...$break";
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| 281 | last;
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| 282 | }
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| 283 | }
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| 284 | $subnet = (1 << ($bitcountmask2-$bitcountmask1));
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| 285 | my $hostn = ($network | ((~$mask2) & $thirtytwobits)) - $network - 1;
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| 286 | if ($hostn > -1) {
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| 287 | print "\nSubnets: $quads_color$subnet";
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| 288 | html('</font>');
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| 289 | print "$norml_color$break";
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| 290 | html('</font>');
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| 291 | }
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| 292 | if ($hostn < 1 ) {
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| 293 | $hostn = 1;
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| 294 | }
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| 295 | print "Hosts: $quads_color" . ($hostn * $subnet);
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| 296 | html('</font>');
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| 297 | print "$norml_color$break";
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| 298 | html('</font>');
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| 299 | }
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| 300 |
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| 301 | sub getclass {
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| 302 | my $network = shift;
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| 303 | my $class = 1;
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| 304 | # print "n $network bit ". (1 << (32-$class)) . " & " .
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| 305 | while (($network & (1 << (32-$class))) == (1 << (32-$class)) ) {
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| 306 | $class++;
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| 307 | if ($class > 5) {
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| 308 | return "invalid";
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| 309 | }
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| 310 | }
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| 311 | return chr($class+64);
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| 312 | }
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| 313 |
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| 314 | sub printnet {
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| 315 | my ($network,$mask1,$mask2) = @_;
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| 316 | my $hmin;
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| 317 | my $hmax;
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| 318 | my $hostn;
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| 319 | my $mask;
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| 320 |
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| 321 | my $broadcast = $network | ((~$mask1) & $thirtytwobits);
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| 322 |
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| 323 | $hmin = $network + 1;
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| 324 | $hmax = $broadcast - 1;
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| 325 | $hostn = $hmax - $hmin + 1;
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| 326 | $mask = ntobitcountmask($mask1);
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| 327 | if ($mask == 31) {
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| 328 | $hmax = $broadcast;
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| 329 | $hmin = $network;
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| 330 | $hostn = 2;
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| 331 | }
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| 332 | if ($mask == 32) {
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| 333 | $hostn = 1;
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| 334 | }
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| 335 |
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| 336 |
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| 337 | #if ($hmax < $hmin) {
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| 338 | # $hmax = $hmin;
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| 339 | # $hostn = 1;
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| 340 | #}
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| 341 |
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| 342 |
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| 343 | #private...
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| 344 | #$p = 0;
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| 345 | #for ($i=0; $i<3; $i++) {
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| 346 | # if ( (&bintoint($hmax) <= $privmax[$i]) &&
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| 347 | # (&bintoint($hmin) >= $privmin[$i]) ) {
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| 348 | # $p = $i +1;
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| 349 | # last;
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| 350 | # }
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| 351 | #}
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| 352 |
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| 353 | #if ($p) {
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| 354 | # $p = $private;
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| 355 | #} else {
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| 356 | # $p = '';
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| 357 | #}
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| 358 |
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| 359 |
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| 360 | if ($mask == 32) {
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| 361 | printline ("Hostroute", $network ,$mask1,$mask2,1);
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| 362 | } else {
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| 363 | printline ("Network", $network ,$mask1,$mask2,1);
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| 364 | printline ("HostMin", $hmin ,$mask1,$mask2);
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| 365 | printline ("HostMax", $hmax ,$mask1,$mask2);
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| 366 | printline ("Broadcast", $broadcast,$mask1,$mask2) if $mask < 31;
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| 367 | }
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| 368 | # html("</table>\n");
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| 369 |
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| 370 | # html('<table border="0" cellspacing="0" cellpadding="0">');
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| 371 | # html("\n");
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| 372 | html("<tr>\n");
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| 373 | html('<td valign="top"><tt>'); #label
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| 374 | print set_color($norml_color);
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| 375 | print "Hosts/Net: " ;
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| 376 | html("</font></tt></td>\n");
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| 377 | html('<td valign="top"><tt>');
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| 378 | # printf $norml_color . "Hosts/Net: </tt>$quads_color%-22s",$hostn;
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| 379 | # html("<td><tt>");
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| 380 | print set_color($quads_color);
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| 381 | printf "%-22s",$hostn;
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| 382 | # printf "%-22s", (ntoa($address).$additional_info);
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| 383 | html("</font></tt></td>\n");
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| 384 | html("<td>"); #label
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| 385 | if ($opt_html) {
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| 386 | #warn "HTML\n";
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| 387 | print wrap_html(30,get_description($network,$mask1));
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| 388 | } else {
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| 389 | print get_description($network,$mask1);
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| 390 | }
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| 391 | html("</font></td>\n");
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| 392 | html("</tr>\n");
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| 393 | html("\n");
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| 394 | text("\n");
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| 395 | text("\n");
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| 396 |
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| 397 | ##printf "Class %s, ",getclass($network);
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| 398 | ##printf "%s",netblock($network,$mask1);
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| 399 | # my ($label,$address,$mask1,$mask2,$classbitcolor_on,$is_netmask) = @_;
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| 400 | # print $sfont . $norml_color;
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| 401 |
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| 402 | # print "$break\n";
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| 403 | # exit;
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| 404 | return $hostn;
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| 405 | }
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| 406 |
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| 407 | sub get_description
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| 408 | {
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| 409 | my $network = shift;
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| 410 | my $mask = shift;
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| 411 | my @description;
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| 412 | my $field;
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| 413 | # class
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| 414 | if ($opt_color || $opt_html) {
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| 415 | $field = set_color($class_color) . "Class " . getclass($network);
|
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| 416 | if ($opt_html) {
|
|---|
| 417 | $field .= '</font>';
|
|---|
| 418 | }
|
|---|
| 419 | $field .= set_color($norml_color);
|
|---|
| 420 | push @description, $field
|
|---|
| 421 | # push @description, set_color($class_color) . "Class " .
|
|---|
| 422 | # getclass($network) . set_color($norml_color);
|
|---|
| 423 | } else {
|
|---|
| 424 | push @description, "Class " . getclass($network);
|
|---|
| 425 | }
|
|---|
| 426 | # netblock
|
|---|
| 427 | my ($netblock_txt,$netblock_url) = split ",",netblock($network,$mask);
|
|---|
| 428 | if (defined $netblock_txt) {
|
|---|
| 429 | if ($opt_html) {
|
|---|
| 430 | $netblock_txt = '<a href="' . $netblock_url . '">' .
|
|---|
| 431 | $netblock_txt . '</a>';
|
|---|
| 432 | }
|
|---|
| 433 | #warn "DESC: '$netblock_txt'";
|
|---|
| 434 | push @description,$netblock_txt;
|
|---|
| 435 | }
|
|---|
| 436 | # /31
|
|---|
| 437 | if (ntobitcountmask($mask) == 31) {
|
|---|
| 438 | if ($opt_html) {
|
|---|
| 439 | push @description,"<a href=\"http://www.ietf.org/rfc/rfc3021.txt\">PtP Link</a>";
|
|---|
| 440 | } else {
|
|---|
| 441 | push @description,"PtP Link RFC 3021";
|
|---|
| 442 | }
|
|---|
| 443 | }
|
|---|
| 444 | #$rfc3021 = "<a href=\"http://www.ietf.org/rfc/rfc3021.txt\">Point-to-Point
|
|---|
| 445 | #Link</a>";
|
|---|
| 446 | return join ", ",@description;
|
|---|
| 447 | }
|
|---|
| 448 |
|
|---|
| 449 | sub printline
|
|---|
| 450 | {
|
|---|
| 451 | my ($label,$address,$mask1,$mask2,$html_fillup) = @_;
|
|---|
| 452 | $mask1 = ntobitcountmask($mask1);
|
|---|
| 453 | $mask2 = ntobitcountmask($mask2);
|
|---|
| 454 | my $line = "";
|
|---|
| 455 | my $bit;
|
|---|
| 456 | my $newbitcolor_on = 0;
|
|---|
| 457 | my $toggle_newbitcolor = 0;
|
|---|
| 458 | my $bit_color;
|
|---|
| 459 | my $additional_info = '';
|
|---|
| 460 | my $classbitcolor_on;
|
|---|
| 461 | my $second_field;
|
|---|
| 462 | if ($label eq 'Netmask') {
|
|---|
| 463 | $additional_info = " = $mask1";
|
|---|
| 464 | }
|
|---|
| 465 | if ($label eq 'Network') {
|
|---|
| 466 | $classbitcolor_on = 1;
|
|---|
| 467 | $additional_info = "/$mask1";
|
|---|
| 468 | }
|
|---|
| 469 | if ($label eq 'Hostroute' && $mask1 == 32) {
|
|---|
| 470 | $classbitcolor_on = 1;
|
|---|
| 471 | }
|
|---|
| 472 |
|
|---|
| 473 | html("<tr>\n");
|
|---|
| 474 | html("<td><tt>");
|
|---|
| 475 | #label
|
|---|
| 476 | print set_color($norml_color);
|
|---|
| 477 | if ($opt_html && $html_fillup) {
|
|---|
| 478 | print "$label:";
|
|---|
| 479 | print " " x (11 - length($label));
|
|---|
| 480 | } else {
|
|---|
| 481 | printf "%-11s","$label:";
|
|---|
| 482 | }
|
|---|
| 483 | html("</font></tt></td>\n");
|
|---|
| 484 | #address
|
|---|
| 485 | html("<td><tt>");
|
|---|
| 486 | print set_color($quads_color);
|
|---|
| 487 | #printf "%s-22s",(ntoa($address).$additional_info);
|
|---|
| 488 |
|
|---|
| 489 | #printf "%s%-11s$sfont%s",set_color($norml_color),"$label:",set_color($quads_color);
|
|---|
| 490 | $second_field = ntoa($address).$additional_info;
|
|---|
| 491 | if ($opt_html && $html_fillup) {
|
|---|
| 492 | print $second_field;
|
|---|
| 493 | print " " x (21 - length($second_field));
|
|---|
| 494 | } else {
|
|---|
| 495 | printf "%-21s", (ntoa($address).$additional_info);
|
|---|
| 496 | }
|
|---|
| 497 | html("</font></tt></td>\n");
|
|---|
| 498 |
|
|---|
| 499 |
|
|---|
| 500 | if ($opt_print_bits)
|
|---|
| 501 | {
|
|---|
| 502 | html("<td><tt>");
|
|---|
| 503 | $bit_color = set_color($binry_color);
|
|---|
| 504 | if ($label eq 'Netmask') {
|
|---|
| 505 | $bit_color = set_color($mask_color);
|
|---|
| 506 | }
|
|---|
| 507 |
|
|---|
| 508 | if ($classbitcolor_on) {
|
|---|
| 509 | $line .= set_color($class_color);
|
|---|
| 510 | } else {
|
|---|
| 511 | $line .= set_color($bit_color);
|
|---|
| 512 | }
|
|---|
| 513 | for (my $i=1;$i<33;$i++)
|
|---|
| 514 | {
|
|---|
| 515 | $bit = 0;
|
|---|
| 516 | if (($address & (1 << 32-$i)) == (1 << 32-$i)) {
|
|---|
| 517 | $bit = 1;
|
|---|
| 518 | }
|
|---|
| 519 | $line .= $bit;
|
|---|
| 520 | if ($classbitcolor_on && $bit == 0) {
|
|---|
| 521 | $classbitcolor_on = 0;
|
|---|
| 522 | if ($newbitcolor_on) {
|
|---|
| 523 | $line .= set_color($subnt_color);
|
|---|
| 524 | } else {
|
|---|
| 525 | $line .= set_color($bit_color);
|
|---|
| 526 | }
|
|---|
| 527 | }
|
|---|
| 528 | # print "$mask1 $i % 8 == " . (($i) % 8) . "\n";
|
|---|
| 529 | if ($i % 8 == 0 && $i < 32) {
|
|---|
| 530 | $line .= set_color($norml_color) . '.';
|
|---|
| 531 | $line .= set_color('oldcolor');
|
|---|
| 532 | }
|
|---|
| 533 | if ($i == $mask1) {
|
|---|
| 534 | $line .= " ";
|
|---|
| 535 | }
|
|---|
| 536 | if (($i == $mask1 || $i == $mask2) && $mask1 != $mask2) {
|
|---|
| 537 | if ($newbitcolor_on) {
|
|---|
| 538 | $newbitcolor_on = 0;
|
|---|
| 539 | $line .= set_color($bit_color) if ! $classbitcolor_on;
|
|---|
| 540 | } else {
|
|---|
| 541 | $newbitcolor_on = 1;
|
|---|
| 542 | $line .= set_color($subnt_color) if ! $classbitcolor_on;
|
|---|
| 543 | }
|
|---|
| 544 | }
|
|---|
| 545 | }
|
|---|
| 546 | $line .= set_color($norml_color);
|
|---|
| 547 | print "$line";
|
|---|
| 548 | html("</tt></font></td>\n");
|
|---|
| 549 | }
|
|---|
| 550 | html("</tr>\n");
|
|---|
| 551 | html("\n");
|
|---|
| 552 | text("\n");
|
|---|
| 553 | #print $sfont . $break;
|
|---|
| 554 | }
|
|---|
| 555 |
|
|---|
| 556 | sub text
|
|---|
| 557 | {
|
|---|
| 558 | my $str = shift;
|
|---|
| 559 | if ($opt_text) {
|
|---|
| 560 | print "$str";
|
|---|
| 561 | }
|
|---|
| 562 | }
|
|---|
| 563 |
|
|---|
| 564 | sub html
|
|---|
| 565 | {
|
|---|
| 566 | my $str = shift;
|
|---|
| 567 | if ($opt_html) {
|
|---|
| 568 | print "$str";
|
|---|
| 569 | }
|
|---|
| 570 | }
|
|---|
| 571 |
|
|---|
| 572 | sub set_color
|
|---|
| 573 | {
|
|---|
| 574 | my $new_color = shift;
|
|---|
| 575 | my $return;
|
|---|
| 576 | if ($new_color eq $color_old) {
|
|---|
| 577 | # print "SETCOLOR saved one dupe\n";
|
|---|
| 578 | # $return = 'x';
|
|---|
| 579 | $return = '';
|
|---|
| 580 | }
|
|---|
| 581 | if ($new_color eq 'oldcolor') {
|
|---|
| 582 | $new_color = $color_old;
|
|---|
| 583 | }
|
|---|
| 584 | $color_old = $color_actual;
|
|---|
| 585 | #$return .= "$color_actual" . "old";
|
|---|
| 586 | $color_actual = $new_color;
|
|---|
| 587 | #return $new_color;
|
|---|
| 588 | $return .= $new_color;
|
|---|
| 589 | return $return;
|
|---|
| 590 | }
|
|---|
| 591 |
|
|---|
| 592 | sub split_network
|
|---|
| 593 | {
|
|---|
| 594 | my $network = shift;
|
|---|
| 595 | my $mask1 = shift;
|
|---|
| 596 | my $mask2 = shift;
|
|---|
| 597 | my @sizes = @_;
|
|---|
| 598 |
|
|---|
| 599 | my $first_address = $network;
|
|---|
| 600 | my $broadcast = $network | ((~$mask1) & $thirtytwobits);
|
|---|
| 601 | my @network;
|
|---|
| 602 | my $i=0;
|
|---|
| 603 | my @net;
|
|---|
| 604 | my @mask;
|
|---|
| 605 | my $needed_addresses = 0;
|
|---|
| 606 | my $needed_size;
|
|---|
| 607 | foreach (@sizes) {
|
|---|
| 608 | $needed_size = round2powerof2($_+2);
|
|---|
| 609 | # printf "%3d -> %3d -> %3d\n",$_,$_+2,$needed_size;
|
|---|
| 610 | push @network , $needed_size .":".$i++;
|
|---|
| 611 | $needed_addresses += $needed_size;
|
|---|
| 612 | }
|
|---|
| 613 | @network = sort { ($b =~ /(.+):/)[0] <=> ($a =~ /(.+):/)[0] } @network;
|
|---|
| 614 | foreach (@network) {
|
|---|
| 615 | my ($size,$nr) = split ":",$_;
|
|---|
| 616 | $net[$nr]= $network;
|
|---|
| 617 | $mask[$nr]= (32-log($size)/log(2));
|
|---|
| 618 | $network += $size;
|
|---|
| 619 | }
|
|---|
| 620 | $i = -1;
|
|---|
| 621 | while ($i++ < $#sizes) {
|
|---|
| 622 | printf "%d. Requested size: %d hosts\n", $i+1,$sizes[$i];
|
|---|
| 623 | ###$mask = $mask[$i];
|
|---|
| 624 | #$mark_newbits = 1;
|
|---|
| 625 | ###print_netmask(bitcountmasktobin($mask[$i]),$mask);
|
|---|
| 626 | printline("Netmask",bitcountmaskton($mask[$i]),bitcountmaskton($mask[$i]),$mask2);
|
|---|
| 627 | printnet($net[$i],bitcountmaskton($mask[$i]),$mask2);
|
|---|
| 628 | }
|
|---|
| 629 |
|
|---|
| 630 | my $used_mask = 32-log(round2powerof2($needed_addresses))/log(2);
|
|---|
| 631 | if ($used_mask < ntobitcountmask($mask1)) {
|
|---|
| 632 | print "Network is too small\n";
|
|---|
| 633 | }
|
|---|
| 634 | print "Needed size: ". $needed_addresses . " addresses.\n";
|
|---|
| 635 | print "Used network: ". ntoa($first_address) ."/$used_mask\n";
|
|---|
| 636 | print "Unused:\n";
|
|---|
| 637 | deaggregate($network,$broadcast);
|
|---|
| 638 |
|
|---|
| 639 | }
|
|---|
| 640 |
|
|---|
| 641 | sub round2powerof2 {
|
|---|
| 642 | my $i=0;
|
|---|
| 643 | while ($_[0] > ( 1 << $i)) {
|
|---|
| 644 | $i++;
|
|---|
| 645 | }
|
|---|
| 646 | return 1 << $i;
|
|---|
| 647 | }
|
|---|
| 648 |
|
|---|
| 649 | # Deaggregate address range
|
|---|
| 650 | # expects: range: (dotted quads)start (dotted quads)end
|
|---|
| 651 |
|
|---|
| 652 | sub deaggregate
|
|---|
| 653 | {
|
|---|
| 654 | my $start = shift;
|
|---|
| 655 | my $end = shift;
|
|---|
| 656 | my $base = $start;
|
|---|
| 657 | my $step;
|
|---|
| 658 | while ($base <= $end)
|
|---|
| 659 | {
|
|---|
| 660 | $step = 0;
|
|---|
| 661 | while (($base | (1 << $step)) != $base) {
|
|---|
| 662 | if (($base | (((~0) & $thirtytwobits) >> (31-$step))) > $end) {
|
|---|
| 663 | last;
|
|---|
| 664 | }
|
|---|
| 665 | $step++;
|
|---|
| 666 | }
|
|---|
| 667 | print ntoa($base)."/" .(32-$step);
|
|---|
| 668 | print "\n";
|
|---|
| 669 | $base += 1 << $step;
|
|---|
| 670 | }
|
|---|
| 671 | }
|
|---|
| 672 |
|
|---|
| 673 | sub getopts
|
|---|
| 674 | # expects nothing
|
|---|
| 675 | # returns @ARGV without options
|
|---|
| 676 | # sets global opt variables
|
|---|
| 677 |
|
|---|
| 678 | # -h --html
|
|---|
| 679 | # -h without further opts -> help
|
|---|
| 680 | # (workaround: can't change meaning of -h since this would
|
|---|
| 681 | # break old cgi_wrapper scripts)
|
|---|
| 682 | # --help
|
|---|
| 683 | # -n --nocolor
|
|---|
| 684 | # -v --version
|
|---|
| 685 | # -c --class print natural class
|
|---|
| 686 | # -s --split
|
|---|
| 687 | # -b --nobinary
|
|---|
| 688 | # -d --deaggregate
|
|---|
| 689 | {
|
|---|
| 690 | my @arguments;
|
|---|
| 691 | my $arg;
|
|---|
| 692 | my $prefix;
|
|---|
| 693 | my $nr_opts = 0;
|
|---|
| 694 | my @tmp;
|
|---|
| 695 |
|
|---|
| 696 | # opt_color defaults to 1 when connected to a terminal
|
|---|
| 697 | if (-t STDOUT) {
|
|---|
| 698 | $opt_color = 1;
|
|---|
| 699 | }
|
|---|
| 700 |
|
|---|
| 701 | while (has_opts()) {
|
|---|
| 702 | $arg = shift @ARGV;
|
|---|
| 703 | if ($arg =~ /^--(.+)/) {
|
|---|
| 704 | $nr_opts += read_opt('--',$1);
|
|---|
| 705 | }
|
|---|
| 706 | elsif ($arg =~ /^-(.+)/) {
|
|---|
| 707 | $nr_opts += read_opt('-',split //,$1);
|
|---|
| 708 | }
|
|---|
| 709 | else {
|
|---|
| 710 | push @tmp, $arg;
|
|---|
| 711 | }
|
|---|
| 712 | }
|
|---|
| 713 |
|
|---|
| 714 | # foreach (@arguments) {
|
|---|
| 715 | # print "arg: $_\n";
|
|---|
| 716 | # }
|
|---|
| 717 |
|
|---|
| 718 | foreach (@ARGV) {
|
|---|
| 719 | push @tmp,$_;
|
|---|
| 720 | }
|
|---|
| 721 | # extract base address and netmasks and ranges
|
|---|
| 722 | foreach (@tmp) {
|
|---|
| 723 | if (/^(.+?)\/(.+)$/) {
|
|---|
| 724 | push @arguments,$1;
|
|---|
| 725 | push @arguments,$2;
|
|---|
| 726 | }
|
|---|
| 727 | elsif (/^(.+)\/$/) {
|
|---|
| 728 | push @arguments,$1;
|
|---|
| 729 | }
|
|---|
| 730 | elsif (/^(.+)\-(.+)$/) {
|
|---|
| 731 | push @arguments,$1;
|
|---|
| 732 | push @arguments,$2;
|
|---|
| 733 | $opt_deaggregate = 1;
|
|---|
| 734 | }
|
|---|
| 735 | elsif (/^\-$/) {
|
|---|
| 736 | $opt_deaggregate = 1;
|
|---|
| 737 | }
|
|---|
| 738 | else {
|
|---|
| 739 | push @arguments, $_;
|
|---|
| 740 | }
|
|---|
| 741 | }
|
|---|
| 742 | if ($#arguments == 2 && $arguments[1] eq '-') {
|
|---|
| 743 | @arguments = ($arguments[0],$arguments[2]);
|
|---|
| 744 | $opt_deaggregate = 1;
|
|---|
| 745 | }
|
|---|
| 746 |
|
|---|
| 747 |
|
|---|
| 748 | # workaround for -h
|
|---|
| 749 | if ($opt_html && $nr_opts == 1 && $#arguments == -1) {
|
|---|
| 750 | $opt_help = 1;
|
|---|
| 751 | }
|
|---|
| 752 |
|
|---|
| 753 |
|
|---|
| 754 | if ($error) {
|
|---|
| 755 | print "$error";
|
|---|
| 756 | exit;
|
|---|
| 757 | }
|
|---|
| 758 | return @arguments;
|
|---|
| 759 |
|
|---|
| 760 | sub read_opt {
|
|---|
| 761 | my $prefix = shift;
|
|---|
| 762 | my $opts_read = 0;
|
|---|
| 763 | foreach my $opt (@_)
|
|---|
| 764 | {
|
|---|
| 765 | ++$opts_read;
|
|---|
| 766 | if ($opt eq 'h' || $opt eq 'html') {
|
|---|
| 767 | $opt_html = 1;
|
|---|
| 768 | $opt_text = 0;
|
|---|
| 769 | }
|
|---|
| 770 | elsif ($opt eq 'help') {
|
|---|
| 771 | $opt_help = 1;
|
|---|
| 772 | }
|
|---|
| 773 | elsif ($opt eq 'n' || $opt eq 'nocolor') {
|
|---|
| 774 | $opt_color = 0;
|
|---|
| 775 | }
|
|---|
| 776 | elsif ($opt eq 'v' || $opt eq 'version') {
|
|---|
| 777 | $opt_version = 1;
|
|---|
| 778 | }
|
|---|
| 779 | elsif ($opt eq 'b' || $opt eq 'nobinary') {
|
|---|
| 780 | $opt_print_bits = 0;
|
|---|
| 781 | }
|
|---|
| 782 | elsif ($opt eq 'c' || $opt eq 'class') {
|
|---|
| 783 | $opt_print_only_class = 1;
|
|---|
| 784 | }
|
|---|
| 785 | elsif ($opt eq 'r' || $opt eq 'range') {
|
|---|
| 786 | $opt_deaggregate = 1;
|
|---|
| 787 | }
|
|---|
| 788 | elsif ($opt eq 's' || $opt eq 'split') {
|
|---|
| 789 | $opt_split = 1;
|
|---|
| 790 | while (defined $ARGV[0] && $ARGV[0] =~ /^\d+$/) {
|
|---|
| 791 | push @opt_split_sizes, shift @ARGV;
|
|---|
| 792 | }
|
|---|
| 793 | if ($#opt_split_sizes < 0) {
|
|---|
| 794 | $error .= "Argument for ". $prefix . $opt . " is missing or invalid \n";
|
|---|
| 795 | }
|
|---|
| 796 | }
|
|---|
| 797 | else {
|
|---|
| 798 | $error .= "Unknown option: " . $prefix . $opt . "\n";
|
|---|
| 799 | --$opts_read;
|
|---|
| 800 | }
|
|---|
| 801 | }
|
|---|
| 802 | return $opts_read;
|
|---|
| 803 | }
|
|---|
| 804 |
|
|---|
| 805 | sub has_opts {
|
|---|
| 806 | foreach (@ARGV) {
|
|---|
| 807 | return 1 if /^-/;
|
|---|
| 808 | }
|
|---|
| 809 | return 0;
|
|---|
| 810 | }
|
|---|
| 811 | }
|
|---|
| 812 |
|
|---|
| 813 |
|
|---|
| 814 | # expects int width
|
|---|
| 815 | # string
|
|---|
| 816 | # returns wrapped string
|
|---|
| 817 | sub wrap_html
|
|---|
| 818 | {
|
|---|
| 819 | my $width = shift;
|
|---|
| 820 | my $str = shift;
|
|---|
| 821 | #warn "WRAP: '$str'\n";
|
|---|
| 822 | my @str = split //,$str;
|
|---|
| 823 | my $result;
|
|---|
| 824 | my $current_pos = 0;
|
|---|
| 825 | my $start = 0;
|
|---|
| 826 | my $last_pos = 0;
|
|---|
| 827 | my $line;
|
|---|
| 828 | while ($current_pos < $#str)
|
|---|
| 829 | {
|
|---|
| 830 | #warn "$current_pos\n";
|
|---|
| 831 | #warn "$current_pos: $str[$current_pos]\n";
|
|---|
| 832 | # find next blank
|
|---|
| 833 | while ($current_pos < $#str && $str[$current_pos] ne ' ') {
|
|---|
| 834 | # ignore tags
|
|---|
| 835 | if ($str[$current_pos] eq '<') {
|
|---|
| 836 | $current_pos++;
|
|---|
| 837 | while ($str[$current_pos] ne '>') {
|
|---|
| 838 | $current_pos++;
|
|---|
| 839 | }
|
|---|
| 840 | }
|
|---|
| 841 | $current_pos++;
|
|---|
| 842 | }
|
|---|
| 843 | # fits in one line?...
|
|---|
| 844 | $line = substr($str,$start,$current_pos-$start);
|
|---|
| 845 | $line =~ s/<.+?>//g;
|
|---|
| 846 | if ( length($line) <= $width) {
|
|---|
| 847 | # ... yes. keep position in mind and try next
|
|---|
| 848 | $last_pos = $current_pos;
|
|---|
| 849 | $current_pos++;
|
|---|
| 850 | next;
|
|---|
| 851 | } else {
|
|---|
| 852 | # ...no. wrap at last position (if there was one,
|
|---|
| 853 | # otherwise wrap here)
|
|---|
| 854 | if ($last_pos ne $start) {
|
|---|
| 855 | $current_pos = $last_pos;
|
|---|
| 856 | }
|
|---|
| 857 | $line = substr($str,$start,$current_pos-$start);
|
|---|
| 858 | $current_pos++;
|
|---|
| 859 | $start = $current_pos;
|
|---|
| 860 | $last_pos = $start;
|
|---|
| 861 | # no output if end of string is reached because
|
|---|
| 862 | # rest of string is treated after this block
|
|---|
| 863 | if ($current_pos < $#str) {
|
|---|
| 864 | #warn "RESULT+ '$line'\n";
|
|---|
| 865 | $result .= "$line<br>";
|
|---|
| 866 | }
|
|---|
| 867 |
|
|---|
| 868 | }
|
|---|
| 869 | }
|
|---|
| 870 | $line = substr($str,$start,$current_pos-$start);
|
|---|
| 871 | $result .= "$line";
|
|---|
| 872 | #warn "'return RESULT $result'\n";
|
|---|
| 873 | return $result;
|
|---|
| 874 | }
|
|---|
| 875 |
|
|---|
| 876 |
|
|---|
| 877 | # gets network address as dq
|
|---|
| 878 | # returns string description,string url
|
|---|
| 879 | sub netblock
|
|---|
| 880 | {
|
|---|
| 881 | my ($mynetwork_start,$mymask) = @_;
|
|---|
| 882 | my $mynetwork_end = $mynetwork_start | ((~$mymask) & $thirtytwobits);
|
|---|
| 883 | my %netblocks = ( "192.168.0.0/16" => "Private Internet,http://www.ietf.org/rfc/rfc1918.txt",
|
|---|
| 884 | "172.16.0.0/12" => "Private Internet,http://www.ietf.org/rfc/rfc1918.txt",
|
|---|
| 885 | "10.0.0.0/8" => "Private Internet,http://www.ietf.org/rfc/rfc1918.txt",
|
|---|
| 886 | "169.254.0.0/16" => "APIPA,http://www.ietf.org/rfc/rfc3330.txt",
|
|---|
| 887 | "127.0.0.0/8" => "Loopback,http://www.ietf.org/rfc/rfc1700.txt",
|
|---|
| 888 | "224.0.0.0/4" => "Multicast,http://www.ietf.org/rfc/rfc3171.txt"
|
|---|
| 889 | );
|
|---|
| 890 | my $match = 0;
|
|---|
| 891 | #
|
|---|
| 892 | foreach (keys %netblocks) {
|
|---|
| 893 | my ($network,$mask) = split "/",$_;
|
|---|
| 894 | my $start = argton($network);
|
|---|
| 895 | my $end = $start + (1 << (32-$mask)) -1;
|
|---|
| 896 | # mynetwork starts within block
|
|---|
| 897 | if ($mynetwork_start >= $start && $mynetwork_start <= $end) {
|
|---|
| 898 | $match++;
|
|---|
| 899 | }
|
|---|
| 900 | # mynetwork ends within block
|
|---|
| 901 | if ($mynetwork_end >= $start && $mynetwork_end <= $end) {
|
|---|
| 902 | $match++;
|
|---|
| 903 | }
|
|---|
| 904 | # block is part of mynetwork
|
|---|
| 905 | if ($start > $mynetwork_start && $end < $mynetwork_end) {
|
|---|
| 906 | $match = 1;
|
|---|
| 907 | }
|
|---|
| 908 | if ($match == 1) {
|
|---|
| 909 | return "In Part ".$netblocks{$_};
|
|---|
| 910 | }
|
|---|
| 911 | if ($match == 2) {
|
|---|
| 912 | return $netblocks{$_};
|
|---|
| 913 | }
|
|---|
| 914 | }
|
|---|
| 915 | return "";
|
|---|
| 916 | }
|
|---|
| 917 |
|
|---|
| 918 | # ------- converter ---------------------------------------------
|
|---|
| 919 |
|
|---|
| 920 | sub bitcountmaskton
|
|---|
| 921 | {
|
|---|
| 922 | my $bitcountmask = shift;
|
|---|
| 923 | my $n;
|
|---|
| 924 | for (my $i=0;$i<$bitcountmask;$i++) {
|
|---|
| 925 | $n |= 1 << (31-$i);
|
|---|
| 926 | }
|
|---|
| 927 | return $n;
|
|---|
| 928 | }
|
|---|
| 929 |
|
|---|
| 930 | sub argton
|
|---|
| 931 | # expects 1. an address as dotted decimals, bit-count-mask, or hex
|
|---|
| 932 | # 2. netmask flag. if set -> check netmask and negate wildcard
|
|---|
| 933 | # masks
|
|---|
| 934 | # returns integer or -1 if invalid
|
|---|
| 935 | {
|
|---|
| 936 | my $arg = shift;
|
|---|
| 937 | my $netmask_flag = shift;
|
|---|
| 938 |
|
|---|
| 939 | my $i = 24;
|
|---|
| 940 | my $n = 0;
|
|---|
| 941 |
|
|---|
| 942 | # dotted decimals
|
|---|
| 943 | if ($arg =~ /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/) {
|
|---|
| 944 | my @decimals = ($1,$2,$3,$4);
|
|---|
| 945 | foreach (@decimals) {
|
|---|
| 946 | if ($_ > 255 || $_ < 0) {
|
|---|
| 947 | return -1;
|
|---|
| 948 | }
|
|---|
| 949 | $n += $_ << $i;
|
|---|
| 950 | $i -= 8;
|
|---|
| 951 | }
|
|---|
| 952 | if ($netmask_flag) {
|
|---|
| 953 | return validate_netmask($n);
|
|---|
| 954 | }
|
|---|
| 955 | return $n;
|
|---|
| 956 | }
|
|---|
| 957 |
|
|---|
| 958 | # bit-count-mask (24 or /24)
|
|---|
| 959 | $arg =~ s/^\/(\d+)$/$1/;
|
|---|
| 960 | if ($arg =~ /^\d{1,2}$/) {
|
|---|
| 961 | if ($arg < 1 || $arg > 32) {
|
|---|
| 962 | return -1;
|
|---|
| 963 | }
|
|---|
| 964 | for ($i=0;$i<$arg;$i++) {
|
|---|
| 965 | $n |= 1 << (31-$i);
|
|---|
| 966 | }
|
|---|
| 967 | return $n;
|
|---|
| 968 | }
|
|---|
| 969 |
|
|---|
| 970 | # hex
|
|---|
| 971 | if ($arg =~ /^[0-9A-Fa-f]{8}$/ ||
|
|---|
| 972 | $arg =~ /^0x[0-9A-Fa-f]{8}$/ ) {
|
|---|
| 973 | if ($netmask_flag) {
|
|---|
| 974 | return validate_netmask(hex($arg));
|
|---|
| 975 | }
|
|---|
| 976 | return hex($arg);
|
|---|
| 977 | }
|
|---|
| 978 |
|
|---|
| 979 | # invalid
|
|---|
| 980 | return -1;
|
|---|
| 981 |
|
|---|
| 982 | sub validate_netmask
|
|---|
| 983 | {
|
|---|
| 984 | my $mask = shift;
|
|---|
| 985 | my $saw_zero = 0;
|
|---|
| 986 | # negate wildcard
|
|---|
| 987 | if (($mask & (1 << 31)) == 0) {
|
|---|
| 988 | print "WILDCARD\n";
|
|---|
| 989 | $mask = ~$mask;
|
|---|
| 990 | }
|
|---|
| 991 | # find ones following zeros
|
|---|
| 992 | for (my $i=0;$i<32;$i++) {
|
|---|
| 993 | if (($mask & (1 << (31-$i))) == 0) {
|
|---|
| 994 | $saw_zero = 1;
|
|---|
| 995 | } else {
|
|---|
| 996 | if ($saw_zero) {
|
|---|
| 997 | print "INVALID NETMASK\n";
|
|---|
| 998 | return -1;
|
|---|
| 999 | }
|
|---|
| 1000 | }
|
|---|
| 1001 | }
|
|---|
| 1002 | return $mask;
|
|---|
| 1003 | }
|
|---|
| 1004 | }
|
|---|
| 1005 |
|
|---|
| 1006 | sub ntoa
|
|---|
| 1007 | {
|
|---|
| 1008 | return join ".",unpack("CCCC",pack("N",shift));
|
|---|
| 1009 | }
|
|---|
| 1010 |
|
|---|
| 1011 | sub ntobitcountmask
|
|---|
| 1012 | # expects integer
|
|---|
| 1013 | # returns bitcountmask
|
|---|
| 1014 | {
|
|---|
| 1015 | my $mask = shift;
|
|---|
| 1016 | my $bitcountmask = 0;
|
|---|
| 1017 | # find first zero
|
|---|
| 1018 | while ( ($mask & (1 << (31-$bitcountmask))) != 0 ) {
|
|---|
| 1019 | if ($bitcountmask > 31) {
|
|---|
| 1020 | last;
|
|---|
| 1021 | }
|
|---|
| 1022 | $bitcountmask++;
|
|---|
| 1023 | }
|
|---|
| 1024 | return $bitcountmask;
|
|---|
| 1025 | }
|
|---|
| 1026 |
|
|---|
| 1027 | # ------- documentation ----------------------------------------
|
|---|
| 1028 |
|
|---|
| 1029 | sub usage {
|
|---|
| 1030 | print << "EOF";
|
|---|
| 1031 | Usage: ipcalc [options] <ADDRESS>[[/]<NETMASK>] [NETMASK]
|
|---|
| 1032 |
|
|---|
| 1033 | ipcalc takes an IP address and netmask and calculates the resulting broadcast,
|
|---|
| 1034 | network, Cisco wildcard mask, and host range. By giving a second netmask, you
|
|---|
| 1035 | can design sub- and supernetworks. It is also intended to be a teaching tool
|
|---|
| 1036 | and presents the results as easy-to-understand binary values.
|
|---|
| 1037 |
|
|---|
| 1038 | -n --nocolor Don't display ANSI color codes.
|
|---|
| 1039 | -b --nobinary Suppress the bitwise output.
|
|---|
| 1040 | -c --class Just print bit-count-mask of given address.
|
|---|
| 1041 | -h --html Display results as HTML (not finished in this version).
|
|---|
| 1042 | -v --version Print Version.
|
|---|
| 1043 | -s --split n1 n2 n3
|
|---|
| 1044 | Split into networks of size n1, n2, n3.
|
|---|
| 1045 | -r --range Deaggregate address range.
|
|---|
| 1046 | --help Longer help text.
|
|---|
| 1047 |
|
|---|
| 1048 | Examples:
|
|---|
| 1049 |
|
|---|
| 1050 | ipcalc 192.168.0.1/24
|
|---|
| 1051 | ipcalc 192.168.0.1/255.255.128.0
|
|---|
| 1052 | ipcalc 192.168.0.1 255.255.128.0 255.255.192.0
|
|---|
| 1053 | ipcalc 192.168.0.1 0.0.63.255
|
|---|
| 1054 |
|
|---|
| 1055 |
|
|---|
| 1056 | ipcalc <ADDRESS1> - <ADDRESS2> deaggregate address range
|
|---|
| 1057 |
|
|---|
| 1058 | ipcalc <ADDRESS>/<NETMASK> --s a b c
|
|---|
| 1059 | split network to subnets
|
|---|
| 1060 | where a b c fits in.
|
|---|
| 1061 |
|
|---|
| 1062 | ! New HTML support not yet finished.
|
|---|
| 1063 |
|
|---|
| 1064 | ipcalc $version
|
|---|
| 1065 | EOF
|
|---|
| 1066 | }
|
|---|
| 1067 |
|
|---|
| 1068 | sub help {
|
|---|
| 1069 | print << "EOF";
|
|---|
| 1070 |
|
|---|
| 1071 | IP Calculator $version
|
|---|
| 1072 |
|
|---|
| 1073 | Enter your netmask(s) in CIDR notation (/25) or dotted decimals (255.255.255.0).
|
|---|
| 1074 | Inverse netmask are recognized. If you mmit the netmask, ipcalc uses the default
|
|---|
| 1075 | netmask for the class of your network.
|
|---|
| 1076 |
|
|---|
| 1077 | Look at the space between the bits of the addresses: The bits before it are
|
|---|
| 1078 | the network part of the address, the bits after it are the host part. You can
|
|---|
| 1079 | see two simple facts: In a network address all host bits are zero, in a
|
|---|
| 1080 | broadcast address they are all set.
|
|---|
| 1081 |
|
|---|
| 1082 | The class of your network is determined by its first bits.
|
|---|
| 1083 |
|
|---|
| 1084 | If your network is a private internet according to RFC 1918 this is remarked.
|
|---|
| 1085 | When displaying subnets the new bits in the network part of the netmask are
|
|---|
| 1086 | marked in a different color.
|
|---|
| 1087 |
|
|---|
| 1088 | The wildcard is the inverse netmask as used for access control lists in Cisco
|
|---|
| 1089 | routers. You can also enter netmasks in wildcard notation.
|
|---|
| 1090 |
|
|---|
| 1091 | Do you want to split your network into subnets? Enter the address and netmask
|
|---|
| 1092 | of your original network and play with the second netmask until the result
|
|---|
| 1093 | matches your needs.
|
|---|
| 1094 |
|
|---|
| 1095 |
|
|---|
| 1096 | Questions? Comments? Drop me a mail...
|
|---|
| 1097 | krischan at jodies.de
|
|---|
| 1098 | http://jodies.de/ipcalc
|
|---|
| 1099 |
|
|---|
| 1100 | Thanks for your nice ideas and help to make this tool more useful:
|
|---|
| 1101 |
|
|---|
| 1102 | Hermann J. Beckers hj.beckers()kreis-steinfurt.de
|
|---|
| 1103 | Kevin Ivory ki()sernet.de
|
|---|
| 1104 | Frank Quotschalla gutschy()netzwerkinfo.de
|
|---|
| 1105 | Sven Anderson sven()anderson.de
|
|---|
| 1106 | Scott Davis sdavis()austin-texas.net
|
|---|
| 1107 | Denis A. Hainsworth denis()ans.net
|
|---|
| 1108 | Steve Kent stevek()onshore.com
|
|---|
| 1109 | Igor Zozulya izozulya()yahoo.com
|
|---|
| 1110 | Lutz Pressler lp()sernet.de
|
|---|
| 1111 |
|
|---|
| 1112 | EOF
|
|---|
| 1113 | usage();
|
|---|
| 1114 | exit;
|
|---|
| 1115 | }
|
|---|
