-- This file is included with Prosody IM. It has modifications,
-- which are hereby placed in the public domain.
--- public domain 20080404 lua@ztact.com
-
-- todo: quick (default) header generation
-- todo: nxdomain, error handling
local socket = require "socket";
-local ztact = require "util.ztact";
local timer = require "util.timer";
local _, windows = pcall(require, "util.windows");
local coroutine, io, math, string, table =
coroutine, io, math, string, table;
-local ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack =
- ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack;
+local ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack, select =
+ ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack, select;
+
+local ztact = { -- public domain 20080404 lua@ztact.com
+ get = function(parent, ...)
+ local len = select('#', ...);
+ for i=1,len do
+ parent = parent[select(i, ...)];
+ if parent == nil then break; end
+ end
+ return parent;
+ end;
+ set = function(parent, ...)
+ local len = select('#', ...);
+ local key, value = select(len-1, ...);
+ local cutpoint, cutkey;
+
+ for i=1,len-2 do
+ local key = select (i, ...)
+ local child = parent[key]
+
+ if value == nil then
+ if child == nil then
+ return;
+ elseif next(child, next(child)) then
+ cutpoint = nil; cutkey = nil;
+ elseif cutpoint == nil then
+ cutpoint = parent; cutkey = key;
+ end
+ elseif child == nil then
+ child = {};
+ parent[key] = child;
+ end
+ parent = child
+ end
+ if value == nil and cutpoint then
+ cutpoint[cutkey] = nil;
+ else
+ parent[key] = value;
+ return value;
+ end
+ end;
+};
local get, set = ztact.get, ztact.set;
local default_timeout = 15;
return self:peek(qname, qtype, qclass) or self:query(qname, qtype, qclass);
end
+function resolver:tohostname(ip)
+ return dns.lookup(ip:gsub("(%d+)%.(%d+)%.(%d+)%.(%d+)", "%4.%3.%2.%1.in-addr.arpa."), "PTR");
+end
--print ---------------------------------------------------------------- print
return _resolver:lookup(...);
end
+function dns.tohostname(...)
+ return _resolver:tohostname(...);
+end
+
function dns.purge(...) -- - - - - - - - - - - - - - - - - - - - - - purge
return _resolver:purge(...);
end