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Move the new version of dns.reverse that does IPv6 reverse lookups out of

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ASN.nse and into the dns library.
This commit is contained in:
david
2008-09-06 03:45:37 +00:00
parent 04be9da7ed
commit dfdf8a5752
2 changed files with 27 additions and 47 deletions
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29
nselib/dns.lua
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@@ -3,6 +3,7 @@ module(... or "dns", package.seeall)
-- simple DNS library -- simple DNS library
-- packet creation, encoding, decoding, querying -- packet creation, encoding, decoding, querying
require("ipOps")
require("stdnse") require("stdnse")
get_servers = nmap.get_dns_servers get_servers = nmap.get_dns_servers
@@ -224,15 +225,37 @@ end
--- ---
-- Formats IP for reverse lookup -- Formats IP for reverse lookup
--@param ip IP address string --@param ip IP address string
--@return "Domain" style representation of IP as subdomain of in-addr.arpa --@return "Domain" style representation of IP as subdomain of in-addr.arpa or ip6.arpa
function reverse(ip) function reverse(ip)
ip = ipOps.expand_ip(ip)
if type(ip) ~= "string" then return nil end if type(ip) ~= "string" then return nil end
local ipParts = stdnse.strsplit("%.", ip) local delim = "%."
local arpa = ".in-addr.arpa"
if ip:match(":") then
delim = ":"
arpa = ".ip6.arpa"
end
local ipParts = stdnse.strsplit(delim, ip)
if #ipParts == 8 then
-- padding
local mask = "0000"
for i, part in ipairs(ipParts) do
ipParts[i] = mask:sub(1, string.len(mask) - string.len(part)) .. part
end
-- 32 parts from 8
local temp = {}
for i, hdt in ipairs(ipParts) do
for part in hdt:gmatch("%x") do
temp[#temp+1] = part
end
end
ipParts = temp
end
local ipReverse = {} local ipReverse = {}
for i = #ipParts, 1, -1 do for i = #ipParts, 1, -1 do
table.insert(ipReverse, ipParts[i]) table.insert(ipReverse, ipParts[i])
end end
return table.concat(ipReverse, ".") .. ".in-addr.arpa" return table.concat(ipReverse, ".") .. arpa
end end
--- ---

45
scripts/ASN.nse
View File

@@ -100,7 +100,7 @@ action = function( host )
end end
-- name to query for -- name to query for
local dname = reverse( host.ip ) local dname = dns.reverse( host.ip )
-- perform queries for each applicable zone -- perform queries for each applicable zone
for asn_type, zone in pairs( cymru[IPv] ) do for asn_type, zone in pairs( cymru[IPv] ) do
@@ -281,49 +281,6 @@ end
-- *** UTILITY FUNCTIONS ***
-- remove when these functions are available in libraries
---
-- Formats IP for reverse lookup.
-- @param ip String IP address.
-- @return "Domain" style representation of IP as subdomain of in-addr.arpa or ip6.arpa
function reverse(ip)
ip = ipOps.expand_ip(ip)
if type(ip) ~= "string" then return nil end
local delim = "%."
local arpa = ".in-addr.arpa"
if ip:match(":") then
delim = ":"
arpa = ".ip6.arpa"
end
local ipParts = stdnse.strsplit(delim, ip)
if #ipParts == 8 then
-- padding
local mask = "0000"
for i, part in ipairs(ipParts) do
ipParts[i] = mask:sub(1, string.len(mask) - string.len(part)) .. part
end
-- 32 parts from 8
local temp = {}
for i, hdt in ipairs(ipParts) do
for part in hdt:gmatch("%x") do
temp[#temp+1] = part
end
end
ipParts = temp
end
local ipReverse = {}
for i = #ipParts, 1, -1 do
table.insert(ipReverse, ipParts[i])
end
return table.concat(ipReverse, ".") .. arpa
end
--- ---
-- Calculates the prefix length for the given IP address range. -- Calculates the prefix length for the given IP address range.
-- @param range String representing an IP address range -- @param range String representing an IP address range