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net/adns.lua @ 1128:b2e548344d61 0.4.1
util.serialization: Write nil for non-serializable data types, and bump the log level to 'error'
author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 05 May 2009 18:07:13 +0100 |
parent | 1005:0eed5db7758d |
child | 1203:23725bfdeed5 |
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local server = require "net.server"; local dns = require "net.dns"; local log = require "util.logger".init("adns"); local coroutine, tostring, pcall = coroutine, tostring, pcall; module "adns" function lookup(handler, qname, qtype, qclass) return coroutine.wrap(function (peek) if peek then log("debug", "Records for %s already cached, using those...", qname); handler(peek); return; end log("debug", "Records for %s not in cache, sending query (%s)...", qname, tostring(coroutine.running())); dns.query(qname, qtype, qclass); coroutine.yield(nil); -- Wait for reply 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)); end end)(dns.peek(qname, qtype, qclass)); end function new_async_socket(sock) local newconn = {}; local listener = {}; function listener.incoming(conn, data) dns.feed(sock, data); end function listener.disconnect() end newconn.handler, newconn._socket = server.wrapclient(sock, "dns", 53, listener); 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; end dns:socket_wrapper_set(new_async_socket); return _M;