1 local server = require "net.server";
2 local dns = require "net.dns";
4 local log = require "util.logger".init("adns");
6 local coroutine, tostring, pcall = coroutine, tostring, pcall;
10 function lookup(handler, qname, qtype, qclass)
11 return coroutine.wrap(function (peek)
13 log("debug", "Records for %s already cached, using those...", qname);
17 log("debug", "Records for %s not in cache, sending query (%s)...", qname, tostring(coroutine.running()));
18 dns.query(qname, qtype, qclass);
19 coroutine.yield(nil); -- Wait for reply
20 log("debug", "Reply for %s (%s)", qname, tostring(coroutine.running()));
21 local ok, err = pcall(handler, dns.peek(qname, qtype, qclass));
23 log("debug", "Error in DNS response handler: %s", tostring(err));
25 end)(dns.peek(qname, qtype, qclass));
28 function new_async_socket(sock)
31 function listener.incoming(conn, data)
34 function listener.disconnect()
36 newconn.handler, newconn._socket = server.wrapclient(sock, "dns", 53, listener);
37 newconn.handler.settimeout = function () end
38 newconn.handler.setsockname = function (_, ...) return sock:setsockname(...); end
39 newconn.handler.setpeername = function (_, ...) local ret = sock:setpeername(...); _.setsend(sock.send); return ret; end
40 newconn.handler.connect = function (_, ...) return sock:connect(...) end
41 newconn.handler.send = function (_, data) _.write(data); return _.sendbuffer(); end
42 return newconn.handler;
45 dns:socket_wrapper_set(new_async_socket);