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New ipOps.str_to_ip function

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dmiller
2014-12-18 00:22:46 +00:00
parent 5aca2bd4f1
commit d9cf8adf04
1 changed files with 26 additions and 1 deletions
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27
nselib/ipOps.lua
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@@ -507,7 +507,7 @@ get_last_ip = function( ip, prefix )
end
---
-- Converts an IP address into an opaque string.
-- Converts an IP address into an opaque string (big-endian)
-- @param ip String representing an IPv4 or IPv6 address.
-- @param family (optional) Address family to convert to. "ipv6" converts IPv4
-- addresses to IPv4-mapped IPv6.
@@ -540,6 +540,28 @@ ip_to_str = function( ip, family )
return table.concat( t )
end
---
-- Converts an opaque string (big-endian) into an IP address
--
-- @param ip Opaque string representing an IP address. If length 4, then IPv4
-- is assumed. If length 16, then IPv6 is assumed.
-- @return IP address in readable notation (or <code>nil</code> in case of an
-- error)
-- @return String error message in case of an error
str_to_ip = function (ip)
if #ip == 4 then
local _, a, b, c, d = bin.unpack("C4", ip)
return ("%d.%d.%d.%d"):format(a, b, c, d)
elseif #ip == 16 then
local _, a, b, c, d, e, f, g, h = bin.unpack(">S8", ip)
local full = ("%x:%x:%x:%x:%x:%x:%x:%x"):format(a, b, c, d, e, f, g, h)
full = full:gsub(":[:0]+", "::", 1) -- Collapse the first (should be longest?) series of :0:
full = full:gsub("^0::", "::", 1) -- handle special case of ::1
return full
else
return nil, "Invalid length"
end
end
---
-- Converts an IP address into a string representing the address as binary
@@ -661,6 +683,9 @@ test_suite:add_test(unittest.is_true(isPrivate("192.168.123.123")), "192.168.123
test_suite:add_test(unittest.is_false(isPrivate("1.1.1.1")), "1.1.1.1 is not private")
test_suite:add_test(unittest.equal(todword("65.66.67.68"),0x41424344), "todword")
test_suite:add_test(unittest.equal(fromdword(0xffffffff),"255.255.255.255"), "fromdword")
test_suite:add_test(unittest.equal(str_to_ip("\x01\x02\x03\x04"),"1.2.3.4"), "str_to_ip (ipv4)")
test_suite:add_test(unittest.equal(str_to_ip("\0\x01\xbe\xef\0\0\0\0\0\0\x02\x03\0\0\0\x01"),"1:beef::203:0:1"), "str_to_ip (ipv6)")
test_suite:add_test(unittest.equal(str_to_ip(("\0"):rep(15) .. "\x01"),"::1"), "str_to_ip (ipv6)")
test_suite:add_test(function()
local parts, err = get_parts_as_number("8.255.0.1")
if parts == nil then return false, err end