X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=net%2Fdns.lua;h=f3d802919b9ae7dbeee77c8f6e7867395c117092;hb=2b29f5f271f7012663f647d8f4a7e11fd308db2d;hp=29d9cf36d227a52df80b9e4ae75a730e094b4e2c;hpb=2fcf677c4dce862df770bb51eec44a6a9e5ab476;p=prosody.git

diff --git a/net/dns.lua b/net/dns.lua
index 29d9cf36..f3d80291 100644
--- a/net/dns.lua
+++ b/net/dns.lua
@@ -2,8 +2,6 @@
 -- 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
@@ -15,7 +13,6 @@
 
 
 local socket = require "socket";
-local ztact = require "util.ztact";
 local timer = require "util.timer";
 
 local _, windows = pcall(require, "util.windows");
@@ -24,9 +21,50 @@ local is_windows = (_ and windows) or os.getenv("WINDIR");
 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;
@@ -531,7 +569,7 @@ end
 
 function resolver:adddefaultnameservers()    -- - - - -  adddefaultnameservers
 	if is_windows then
-		if windows then
+		if windows and windows.get_nameservers then
 			for _, server in ipairs(windows.get_nameservers()) do
 				self:addnameserver(server);
 			end
@@ -674,11 +712,11 @@ function resolver:query(qname, qtype, qclass)    -- - - - - - - - - - -- query
 		retry  = socket.gettime() + self.delays[1]
 	};
 
-  -- remember the query
+	-- remember the query
 	self.active[id] = self.active[id] or {};
 	self.active[id][question] = o;
 
-  -- remember which coroutine wants the answer
+	-- remember which coroutine wants the answer
 	local co = coroutine.running();
 	if co then
 		set(self.wanted, qclass, qtype, qname, co, true);
@@ -738,7 +776,7 @@ function resolver:servfail(sock)
 			end
 		end
 	end
-   
+
 	if num == self.best_server then
 		self.best_server = self.best_server + 1;
 		if self.best_server > #self.server then
@@ -887,12 +925,12 @@ end
 function resolver:lookup(qname, qtype, qclass)    -- - - - - - - - - -  lookup
 	self:query (qname, qtype, qclass)
 	while self:pulse() do
-           local recvt = {}
-           for i, s in ipairs(self.socket) do
-              recvt[i] = s
-           end
-           socket.select(recvt, nil, 4)
-        end
+		local recvt = {}
+		for i, s in ipairs(self.socket) do
+			recvt[i] = s
+		end
+		socket.select(recvt, nil, 4)
+	end
 	--print(self.cache);
 	return self:peek(qname, qtype, qclass);
 end
@@ -901,6 +939,9 @@ function resolver:lookupex(handler, qname, qtype, qclass)    -- - - - - - - - -
 	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
 
@@ -976,6 +1017,10 @@ function dns.lookup(...)    -- - - - - - - - - - - - - - - - - - - - -  lookup
 	return _resolver:lookup(...);
 end
 
+function dns.tohostname(...)
+	return _resolver:tohostname(...);
+end
+
 function dns.purge(...)    -- - - - - - - - - - - - - - - - - - - - - -  purge
 	return _resolver:purge(...);
 end