122 lines
3.4 KiB
JavaScript
122 lines
3.4 KiB
JavaScript
// Copyright 2011 Timothy J Fontaine <tjfontaine@gmail.com>
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE
|
|
|
|
'use strict';
|
|
|
|
var dgram = require('dgram'),
|
|
EventEmitter = require('events').EventEmitter,
|
|
net = require('net'),
|
|
util = require('util'),
|
|
UDPSocket = require('./utils').UDPSocket,
|
|
TCPSocket = require('./utils').TCPSocket,
|
|
Packet = require('./packet');
|
|
|
|
var Server = function(opts) {
|
|
var self = this;
|
|
|
|
this._socket.on('listening', function() {
|
|
self.emit('listening');
|
|
});
|
|
|
|
this._socket.on('close', function() {
|
|
self.emit('close');
|
|
});
|
|
|
|
this._socket.on('error', function(err) {
|
|
self.emit('socketError', err, self._socket);
|
|
});
|
|
};
|
|
util.inherits(Server, EventEmitter);
|
|
|
|
Server.prototype.close = function() {
|
|
this._socket.close();
|
|
};
|
|
|
|
Server.prototype.address = function() {
|
|
return this._socket.address();
|
|
};
|
|
|
|
Server.prototype.handleMessage = function(msg, remote, address) {
|
|
var request, response = new Packet(remote);
|
|
|
|
try {
|
|
request = Packet.parse(msg, remote);
|
|
|
|
request.address = address;
|
|
|
|
response.header.id = request.header.id;
|
|
response.header.qr = 1;
|
|
response.question = request.question;
|
|
|
|
this.emit('request', request, response);
|
|
} catch (e) {
|
|
this.emit('error', e, msg, response);
|
|
}
|
|
};
|
|
|
|
var UDPServer = function(opts) {
|
|
var self = this;
|
|
|
|
this._socket = dgram.createSocket(opts.dgram_type || 'udp4');
|
|
|
|
this._socket.on('message', function(msg, remote) {
|
|
self.handleMessage(msg, new UDPSocket(self._socket, remote), remote);
|
|
});
|
|
|
|
Server.call(this, opts);
|
|
};
|
|
util.inherits(UDPServer, Server);
|
|
|
|
UDPServer.prototype.serve = function(port, address) {
|
|
this._socket.bind(port, address);
|
|
};
|
|
|
|
var TCPServer = function(opts) {
|
|
var self = this;
|
|
|
|
this._socket = net.createServer(function(client) {
|
|
var tcp = new TCPSocket(client);
|
|
var address = client.address();
|
|
tcp.on('message', function(msg, remote) {
|
|
self.handleMessage(msg, tcp, address);
|
|
});
|
|
tcp.catchMessages();
|
|
});
|
|
|
|
Server.call(this, opts);
|
|
};
|
|
util.inherits(TCPServer, Server);
|
|
|
|
TCPServer.prototype.serve = function(port, address) {
|
|
this._socket.listen(port, address);
|
|
};
|
|
|
|
exports.createServer = function(opts) {
|
|
return new UDPServer(opts || {});
|
|
};
|
|
|
|
exports.createUDPServer = function(opts) {
|
|
return exports.createServer(opts);
|
|
};
|
|
|
|
exports.createTCPServer = function(opts) {
|
|
return new TCPServer(opts || {});
|
|
};
|