prosody
9332b43931f5
util/ip.lua

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util/ip.lua @ 7842:9332b43931f5

mod_mam: Add some comments explaining archive expiry
author Kim Alvefur <zash@zash.se>
date Sat, 19 Nov 2016 18:26:09 +0100
parent 7486:c415a3fd4485
child 8382:e5d00bf4a4d5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
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1 -- Prosody IM
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
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2 -- Copyright (C) 2008-2011 Florian Zeitz
b1e49cc314cb util.ip: New module containing IP related functions
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3 --
b1e49cc314cb util.ip: New module containing IP related functions
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4 -- This project is MIT/X11 licensed. Please see the
b1e49cc314cb util.ip: New module containing IP related functions
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5 -- COPYING file in the source package for more information.
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6 --
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7
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8 local ip_methods = {};
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9 local ip_mt = { __index = function (ip, key) return (ip_methods[key])(ip); end,
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10 __tostring = function (ip) return ip.addr; end,
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11 __eq = function (ipA, ipB) return ipA.addr == ipB.addr; end};
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12 local hex2bits = { ["0"] = "0000", ["1"] = "0001", ["2"] = "0010", ["3"] = "0011", ["4"] = "0100", ["5"] = "0101", ["6"] = "0110", ["7"] = "0111", ["8"] = "1000", ["9"] = "1001", ["A"] = "1010", ["B"] = "1011", ["C"] = "1100", ["D"] = "1101", ["E"] = "1110", ["F"] = "1111" };
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13
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14 local function new_ip(ipStr, proto)
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306aabf2d57d util.ip: Automatically determine protocol of IP address if none specified. Return error if invalid. [Backported from 0.10]
Matthew Wild <mwild1@gmail.com>
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15 if not proto then
306aabf2d57d util.ip: Automatically determine protocol of IP address if none specified. Return error if invalid. [Backported from 0.10]
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16 local sep = ipStr:match("^%x+(.)");
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17 if sep == ":" or (not(sep) and ipStr:sub(1,1) == ":") then
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18 proto = "IPv6"
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19 elseif sep == "." then
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20 proto = "IPv4"
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21 end
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22 if not proto then
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23 return nil, "invalid address";
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24 end
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25 elseif proto ~= "IPv4" and proto ~= "IPv6" then
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26 return nil, "invalid protocol";
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27 end
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28 local zone;
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29 if proto == "IPv6" and ipStr:find('%', 1, true) then
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30 ipStr, zone = ipStr:match("^(.-)%%(.*)");
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31 end
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32 if proto == "IPv6" and ipStr:find('.', 1, true) then
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33 local changed;
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34 ipStr, changed = ipStr:gsub(":(%d+)%.(%d+)%.(%d+)%.(%d+)$", function(a,b,c,d)
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35 return (":%04X:%04X"):format(a*256+b,c*256+d);
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36 end);
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37 if changed ~= 1 then return nil, "invalid-address"; end
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38 end
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39
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40 return setmetatable({ addr = ipStr, proto = proto, zone = zone }, ip_mt);
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41 end
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42
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43 local function toBits(ip)
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44 local result = "";
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45 local fields = {};
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46 if ip.proto == "IPv4" then
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47 ip = ip.toV4mapped;
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48 end
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49 ip = (ip.addr):upper();
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50 ip:gsub("([^:]*):?", function (c) fields[#fields + 1] = c end);
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51 if not ip:match(":$") then fields[#fields] = nil; end
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52 for i, field in ipairs(fields) do
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53 if field:len() == 0 and i ~= 1 and i ~= #fields then
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54 for _ = 1, 16 * (9 - #fields) do
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55 result = result .. "0";
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56 end
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57 else
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58 for _ = 1, 4 - field:len() do
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59 result = result .. "0000";
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60 end
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61 for j = 1, field:len() do
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62 result = result .. hex2bits[field:sub(j, j)];
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63 end
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64 end
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65 end
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66 return result;
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67 end
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68
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69 local function commonPrefixLength(ipA, ipB)
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70 ipA, ipB = toBits(ipA), toBits(ipB);
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71 for i = 1, 128 do
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72 if ipA:sub(i,i) ~= ipB:sub(i,i) then
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73 return i-1;
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74 end
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75 end
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76 return 128;
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77 end
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78
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79 local function v4scope(ip)
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80 local fields = {};
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81 ip:gsub("([^.]*).?", function (c) fields[#fields + 1] = tonumber(c) end);
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82 -- Loopback:
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83 if fields[1] == 127 then
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84 return 0x2;
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85 -- Link-local unicast:
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86 elseif fields[1] == 169 and fields[2] == 254 then
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87 return 0x2;
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88 -- Global unicast:
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89 else
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90 return 0xE;
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91 end
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92 end
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93
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94 local function v6scope(ip)
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95 -- Loopback:
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96 if ip:match("^[0:]*1$") then
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97 return 0x2;
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98 -- Link-local unicast:
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99 elseif ip:match("^[Ff][Ee][89ABab]") then
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100 return 0x2;
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101 -- Site-local unicast:
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102 elseif ip:match("^[Ff][Ee][CcDdEeFf]") then
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103 return 0x5;
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104 -- Multicast:
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105 elseif ip:match("^[Ff][Ff]") then
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106 return tonumber("0x"..ip:sub(4,4));
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107 -- Global unicast:
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108 else
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109 return 0xE;
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110 end
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111 end
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112
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113 local function label(ip)
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114 if commonPrefixLength(ip, new_ip("::1", "IPv6")) == 128 then
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115 return 0;
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116 elseif commonPrefixLength(ip, new_ip("2002::", "IPv6")) >= 16 then
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117 return 2;
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118 elseif commonPrefixLength(ip, new_ip("2001::", "IPv6")) >= 32 then
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119 return 5;
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120 elseif commonPrefixLength(ip, new_ip("fc00::", "IPv6")) >= 7 then
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121 return 13;
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122 elseif commonPrefixLength(ip, new_ip("fec0::", "IPv6")) >= 10 then
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123 return 11;
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124 elseif commonPrefixLength(ip, new_ip("3ffe::", "IPv6")) >= 16 then
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125 return 12;
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126 elseif commonPrefixLength(ip, new_ip("::", "IPv6")) >= 96 then
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127 return 3;
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128 elseif commonPrefixLength(ip, new_ip("::ffff:0:0", "IPv6")) >= 96 then
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129 return 4;
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130 else
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131 return 1;
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132 end
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Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
133 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
134
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
135 local function precedence(ip)
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
136 if commonPrefixLength(ip, new_ip("::1", "IPv6")) == 128 then
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
137 return 50;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
138 elseif commonPrefixLength(ip, new_ip("2002::", "IPv6")) >= 16 then
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
139 return 30;
5552
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
140 elseif commonPrefixLength(ip, new_ip("2001::", "IPv6")) >= 32 then
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
141 return 5;
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
142 elseif commonPrefixLength(ip, new_ip("fc00::", "IPv6")) >= 7 then
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
143 return 3;
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
144 elseif commonPrefixLength(ip, new_ip("fec0::", "IPv6")) >= 10 then
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
145 return 1;
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
146 elseif commonPrefixLength(ip, new_ip("3ffe::", "IPv6")) >= 16 then
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
147 return 1;
4419
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parents:
diff changeset
148 elseif commonPrefixLength(ip, new_ip("::", "IPv6")) >= 96 then
5552
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
149 return 1;
4419
b1e49cc314cb util.ip: New module containing IP related functions
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parents:
diff changeset
150 elseif commonPrefixLength(ip, new_ip("::ffff:0:0", "IPv6")) >= 96 then
5552
40e7a6cf15ff util.rfc{3484,6724}: Update to RFC 6724
Florian Zeitz <florob@babelmonkeys.de>
parents: 4433
diff changeset
151 return 35;
4419
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parents:
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152 else
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
153 return 40;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
154 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
155 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
156
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
157 local function toV4mapped(ip)
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Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
158 local fields = {};
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
159 local ret = "::ffff:";
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
160 ip:gsub("([^.]*).?", function (c) fields[#fields + 1] = tonumber(c) end);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
161 ret = ret .. ("%02x"):format(fields[1]);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
162 ret = ret .. ("%02x"):format(fields[2]);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
163 ret = ret .. ":"
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
164 ret = ret .. ("%02x"):format(fields[3]);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
165 ret = ret .. ("%02x"):format(fields[4]);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
166 return new_ip(ret, "IPv6");
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
167 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
168
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Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
169 function ip_methods:toV4mapped()
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parents:
diff changeset
170 if self.proto ~= "IPv4" then return nil, "No IPv4 address" end
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Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
171 local value = toV4mapped(self.addr);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
172 self.toV4mapped = value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
173 return value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
174 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
175
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
176 function ip_methods:label()
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
177 local value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
178 if self.proto == "IPv4" then
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
179 value = label(self.toV4mapped);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
180 else
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
181 value = label(self);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
182 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
183 self.label = value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
184 return value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
185 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
186
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
187 function ip_methods:precedence()
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
188 local value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
189 if self.proto == "IPv4" then
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
190 value = precedence(self.toV4mapped);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
191 else
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
192 value = precedence(self);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
193 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
194 self.precedence = value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
195 return value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
196 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
197
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
198 function ip_methods:scope()
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
199 local value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
200 if self.proto == "IPv4" then
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
201 value = v4scope(self.addr);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
202 else
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
203 value = v6scope(self.addr);
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
204 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
205 self.scope = value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
206 return value;
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
207 end
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
208
5588
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
209 function ip_methods:private()
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
210 local private = self.scope ~= 0xE;
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
211 if not private and self.proto == "IPv4" then
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
212 local ip = self.addr;
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
213 local fields = {};
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
214 ip:gsub("([^.]*).?", function (c) fields[#fields + 1] = tonumber(c) end);
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
215 if fields[1] == 127 or fields[1] == 10 or (fields[1] == 192 and fields[2] == 168)
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
216 or (fields[1] == 172 and (fields[2] >= 16 or fields[2] <= 32)) then
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
217 private = true;
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
218 end
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
219 end
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
220 self.private = private;
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
221 return private;
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
222 end
8c1a3243d16f util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)
Matthew Wild <mwild1@gmail.com>
parents: 5587
diff changeset
223
5603
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
224 local function parse_cidr(cidr)
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
225 local bits;
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
226 local ip_len = cidr:find("/", 1, true);
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
227 if ip_len then
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
228 bits = tonumber(cidr:sub(ip_len+1, -1));
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
229 cidr = cidr:sub(1, ip_len-1);
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
230 end
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
231 return new_ip(cidr), bits;
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
232 end
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
233
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
234 local function match(ipA, ipB, bits)
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
235 local common_bits = commonPrefixLength(ipA, ipB);
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
236 if bits and ipB.proto == "IPv4" then
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
237 common_bits = common_bits - 96; -- v6 mapped addresses always share these bits
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
238 end
6926
d96b2aa7a11d util.ip: Improve comparison, == doesn't necessarily handle IPv6 addresses correctly if they aren't normalized (case, ::, etc.)
Matthew Wild <mwild1@gmail.com>
parents: 5776
diff changeset
239 return common_bits >= (bits or 128);
5603
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
240 end
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
241
4419
b1e49cc314cb util.ip: New module containing IP related functions
Florian Zeitz <florob@babelmonkeys.de>
parents:
diff changeset
242 return {new_ip = new_ip,
5603
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
243 commonPrefixLength = commonPrefixLength,
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
244 parse_cidr = parse_cidr,
e07f4f02e4f9 util.ip: Add CIDR notation parsing and matching
Matthew Wild <mwild1@gmail.com>
parents: 5599
diff changeset
245 match=match};