diff options
Diffstat (limited to 'util/ip.lua')
| -rw-r--r-- | util/ip.lua | 47 |
1 files changed, 41 insertions, 6 deletions
diff --git a/util/ip.lua b/util/ip.lua index acfd7f24..81a98ef7 100644 --- a/util/ip.lua +++ b/util/ip.lua @@ -51,15 +51,15 @@ local function toBits(ip) if not ip:match(":$") then fields[#fields] = nil; end for i, field in ipairs(fields) do if field:len() == 0 and i ~= 1 and i ~= #fields then - for i = 1, 16 * (9 - #fields) do + for _ = 1, 16 * (9 - #fields) do result = result .. "0"; end else - for i = 1, 4 - field:len() do + for _ = 1, 4 - field:len() do result = result .. "0000"; end - for i = 1, field:len() do - result = result .. hex2bits[field:sub(i,i)]; + for j = 1, field:len() do + result = result .. hex2bits[field:sub(j, j)]; end end end @@ -96,7 +96,7 @@ local function v6scope(ip) if ip:match("^[0:]*1$") then return 0x2; -- Link-local unicast: - elseif ip:match("^[Ff][Ee][89ABab]") then + elseif ip:match("^[Ff][Ee][89ABab]") then return 0x2; -- Site-local unicast: elseif ip:match("^[Ff][Ee][CcDdEeFf]") then @@ -206,5 +206,40 @@ 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 + +local function parse_cidr(cidr) + local bits; + local ip_len = cidr:find("/", 1, true); + if ip_len then + bits = tonumber(cidr:sub(ip_len+1, -1)); + cidr = cidr:sub(1, ip_len-1); + end + return new_ip(cidr), bits; +end + +local function match(ipA, ipB, bits) + local common_bits = commonPrefixLength(ipA, ipB); + if bits and ipB.proto == "IPv4" then + common_bits = common_bits - 96; -- v6 mapped addresses always share these bits + end + return common_bits >= (bits or 128); +end + return {new_ip = new_ip, - commonPrefixLength = commonPrefixLength}; + commonPrefixLength = commonPrefixLength, + parse_cidr = parse_cidr, + match=match}; |