-- Prosody IM
--- Copyright (C) 2008-2009 Matthew Wild
--- Copyright (C) 2008-2009 Waqas Hussain
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
local log = require "util.logger".init("adns");
+local t_insert, t_remove = table.insert, table.remove;
local coroutine, tostring, pcall = coroutine, tostring, pcall;
+local function dummy_send(sock, data, i, j) return (j-i)+1; end
+
module "adns"
function lookup(handler, qname, qtype, qclass)
log("debug", "Reply for %s (%s)", qname, tostring(coroutine.running()));
local ok, err = pcall(handler, dns.peek(qname, qtype, qclass));
if not ok then
- log("debug", "Error in DNS response handler: %s", tostring(err));
+ log("error", "Error in DNS response handler: %s", tostring(err));
end
end)(dns.peek(qname, qtype, qclass));
end
end
end
-function new_async_socket(sock)
- local newconn = {};
+function new_async_socket(sock, resolver)
+ local peername = "<unknown>";
local listener = {};
- function listener.incoming(conn, data)
- dns.feed(sock, data);
+ local handler = {};
+ function listener.onincoming(conn, data)
+ if data then
+ dns.feed(handler, data);
+ end
end
- function listener.disconnect()
+ function listener.ondisconnect(conn, err)
+ if err then
+ log("warn", "DNS socket for %s disconnected: %s", peername, err);
+ local servers = resolver.server;
+ if resolver.socketset[conn] == resolver.best_server and resolver.best_server == #servers then
+ log("error", "Exhausted all %d configured DNS servers, next lookup will try %s again", #servers, servers[1]);
+ end
+
+ resolver:servfail(conn); -- Let the magic commence
+ end
end
- newconn.handler, newconn._socket = server.wrapclient(sock, "dns", 53, listener);
- if not newconn.handler then
+ handler = server.wrapclient(sock, "dns", 53, listener);
+ if not handler then
log("warn", "handler is nil");
end
- if not newconn._socket then
- log("warn", "socket is nil");
- end
- newconn.handler.settimeout = function () end
- newconn.handler.setsockname = function (_, ...) return sock:setsockname(...); end
- newconn.handler.setpeername = function (_, ...) local ret = sock:setpeername(...); _.setsend(sock.send); return ret; end
- newconn.handler.connect = function (_, ...) return sock:connect(...) end
- newconn.handler.send = function (_, data) _.write(data); return _.sendbuffer(); end
- return newconn.handler;
+
+ handler.settimeout = function () end
+ handler.setsockname = function (_, ...) return sock:setsockname(...); end
+ handler.setpeername = function (_, ...) peername = (...); local ret = sock:setpeername(...); _:set_send(dummy_send); return ret; end
+ handler.connect = function (_, ...) return sock:connect(...) end
+ --handler.send = function (_, data) _:write(data); return _.sendbuffer and _.sendbuffer(); end
+ handler.send = function (_, data) return sock:send(data); end
+ return handler;
end
-dns:socket_wrapper_set(new_async_socket);
+dns.socket_wrapper_set(new_async_socket);
return _M;