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util.ip: Add 'private' method/property to determine whether an IP address is generally expected to be internet-routeable (YMMV)

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Matthew Wild 2013-05-17 14:53:51 +01:00
parent 4d630bbd3c
commit e082db3cf7
1 changed files with 15 additions and 0 deletions
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15
util/ip.lua
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@ -193,5 +193,20 @@ function ip_methods:scope()
return value;
end
function ip_methods:private()
local private = self.scope ~= 0xE;
if not private and self.proto == "IPv4" then
local ip = self.addr;
local fields = {};
ip:gsub("([^.]*).?", function (c) fields[#fields + 1] = tonumber(c) end);
if fields[1] == 127 or fields[1] == 10 or (fields[1] == 192 and fields[2] == 168)
or (fields[1] == 172 and (fields[2] >= 16 or fields[2] <= 32)) then
private = true;
end
end
self.private = private;
return private;
end
return {new_ip = new_ip,
commonPrefixLength = commonPrefixLength};