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476 lines
10 KiB
476 lines
10 KiB
var events = require('events');
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var stream = require('stream');
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var timers = require('timers');
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var util = require('util');
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var assert = require('assert');
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var TCP = process.binding('tcp_wrap').TCP;
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/* Bit flags for socket._flags */
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var FLAG_GOT_EOF = 1 << 0;
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var FLAG_SHUTDOWN = 1 << 1;
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var FLAG_DESTROY_SOON = 1 << 2;
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var debug;
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if (process.env.NODE_DEBUG && /net/.test(process.env.NODE_DEBUG)) {
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debug = function(x) { console.error('NET:', x); };
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} else {
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debug = function() { };
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}
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exports.createServer = function() {
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return new Server(arguments[0], arguments[1]);
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};
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exports.connect = exports.createConnection = function(port, host /* [cb] */ ) {
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var s = new Socket();
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s.connect(port, host, arguments[2]);
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return s;
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};
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function Socket(options) {
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if (!(this instanceof Socket)) return new Socket(options);
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stream.Stream.call(this);
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// private
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if (options && options.handle) {
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this._handle = options.handle;
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} else {
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this._handle = new TCP();
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}
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this._handle.socket = this;
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this._handle.onread = onread;
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this.allowHalfOpen = options ? (options.allowHalfOpen || false) : false;
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this._writeRequests = [];
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this._flags = 0;
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}
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util.inherits(Socket, stream.Stream);
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exports.Socket = Socket;
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exports.Stream = Socket; // Legacy naming.
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Socket.prototype.setTimeout = function(msecs, callback) {
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if (msecs > 0) {
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timers.enroll(this, msecs);
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if (typeof this.fd === 'number') { timers.active(this); }
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if (callback) {
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this.once('timeout', callback);
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}
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} else if (msecs === 0) {
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timers.unenroll(this);
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}
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};
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Socket.prototype.setNoDelay = function() {
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/* TODO implement me */
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};
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Object.defineProperty(Socket.prototype, 'readyState', {
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get: function() {
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if (this._connecting) {
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return 'opening';
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} else if (this.readable && this.writable) {
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return 'open';
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} else if (this.readable && !this.writable) {
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return 'readOnly';
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} else if (!this.readable && this.writable) {
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return 'writeOnly';
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} else {
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return 'closed';
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}
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}
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});
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Object.defineProperty(Socket.prototype, 'bufferSize', {
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get: function() {
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return this._handle.writeQueueSize;
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}
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});
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Socket.prototype.pause = function() {
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this._handle.readStop();
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};
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Socket.prototype.resume = function() {
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this._handle.readStart();
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};
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Socket.prototype.end = function(data, encoding) {
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if (!this.writable) return;
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this.writable = false;
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if (data) this.write(data, encoding);
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DTRACE_NET_STREAM_END(this);
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if (this._flags & FLAG_GOT_EOF) {
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this.destroySoon();
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} else {
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this._flags |= FLAG_SHUTDOWN;
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var shutdownReq = this._handle.shutdown();
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shutdownReq.oncomplete = afterShutdown;
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}
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};
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function afterShutdown(status, handle, req) {
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var self = handle.socket;
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assert.ok(self._flags & FLAG_SHUTDOWN);
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if (self._flags & FLAG_GOT_EOF) {
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self.destroy();
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} else {
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}
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}
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Socket.prototype.destroySoon = function() {
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this.writable = false;
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this._flags |= FLAG_DESTROY_SOON;
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if (this._writeRequests.length == 0) {
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this.destroy();
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}
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};
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Socket.prototype.destroy = function(exception) {
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var self = this;
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debug('destroy ' + this.fd);
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this.readable = this.writable = false;
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timers.unenroll(this);
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if (this.server && !this.destroyed) {
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this.server.connections--;
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}
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debug('close ' + this.fd);
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this._handle.close();
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process.nextTick(function() {
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if (exception) self.emit('error', exception);
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self.emit('close', exception ? true : false);
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});
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this.destroyed = true;
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};
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function onread(buffer, offset, length) {
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var handle = this;
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var self = handle.socket;
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assert.equal(handle, self._handle);
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timers.active(self);
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var end = offset + length;
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if (buffer) {
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// Emit 'data' event.
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if (self._decoder) {
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// Emit a string.
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var string = self._decoder.write(buffer.slice(offset, end));
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if (string.length) self.emit('data', string);
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} else {
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// Emit a slice. Attempt to avoid slicing the buffer if no one is
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// listening for 'data'.
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if (self._events && self._events['data']) {
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self.emit('data', buffer.slice(offset, end));
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}
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}
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// Optimization: emit the original buffer with end points
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if (self.ondata) self.ondata(buffer, offset, end);
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} else {
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// EOF
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self.readable = false;
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assert.ok(!(self._flags & FLAG_GOT_EOF));
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self._flags |= FLAG_GOT_EOF;
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// We call destroy() before end(). 'close' not emitted until nextTick so
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// the 'end' event will come first as required.
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if (!self.writable) self.destroy();
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if (!self.allowHalfOpen) self.end();
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if (self._events && self._events['end']) self.emit('end');
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if (self.onend) self.onend();
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}
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}
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Socket.prototype.setEncoding = function(encoding) {
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var StringDecoder = require('string_decoder').StringDecoder; // lazy load
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this._decoder = new StringDecoder(encoding);
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};
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Socket.prototype.write = function(data /* [encoding], [fd], [cb] */) {
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var encoding, fd, cb;
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// parse arguments
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if (typeof arguments[1] == 'string') {
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encoding = arguments[1];
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if (typeof arguments[2] == 'number') {
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fd = arguments[2];
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cb = arguments[3];
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} else {
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cb = arguments[2];
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}
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} else if (typeof arguments[1] == 'number') {
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fd = arguments[1];
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cb = arguments[2];
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} else if (typeof arguments[2] == 'number') {
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// This case is to support old calls when the encoding argument
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// was not optional: s.write(buf, undefined, pipeFDs[1])
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encoding = arguments[1];
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fd = arguments[2];
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cb = arguments[3];
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} else {
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cb = arguments[1];
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}
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// Change strings to buffers. SLOW
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if (typeof data == 'string') {
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data = new Buffer(data, encoding);
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}
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var writeReq = this._handle.write(data);
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writeReq.oncomplete = afterWrite;
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writeReq.cb = cb;
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this._writeRequests.push(writeReq);
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return this._handle.writeQueueSize == 0;
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};
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function afterWrite(status, handle, req, buffer) {
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var self = handle.socket;
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// TODO check status.
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var req_ = self._writeRequests.shift();
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assert.equal(req, req_);
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if (self._writeRequests.length == 0) {
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self.emit('drain');
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}
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if (req.cb) req.cb();
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if (self._writeRequests.length == 0 && self._flags & FLAG_DESTROY_SOON) {
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self.destroy();
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}
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}
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function connectip(self, port, ip) {
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self.remoteAddress = ip;
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self.remotePort = port;
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// TODO return promise from Socket.prototype.connect which
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// wraps _connectReq.
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assert.ok(!self._connecting);
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var connectReq = self._handle.connect(ip, port);
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if (connectReq) {
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self._connecting = true;
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connectReq.oncomplete = afterConnect;
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} else {
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self.destroy(errnoException(errno, 'connect'));
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}
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}
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Socket.prototype.connect = function(port, host /* [cb] */) {
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var self = this;
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if (typeof arguments[2] === 'function') {
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self.on('connect', arguments[2]);
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}
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timers.active(this);
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if (typeof host == 'undefined') {
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connectip(self, port, '127.0.0.1');
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} else {
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require('dns').lookup(host, function(err, ip, addressType) {
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if (err) {
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self.emit('error', err);
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} else {
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timers.active(self);
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if (addressType != 4) {
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throw new Error("ipv6 addresses not yet supported by libuv");
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}
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connectip(self, port, ip || '127.0.0.1');
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}
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});
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}
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};
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function afterConnect(status, handle, req) {
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var self = handle.socket;
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assert.equal(handle, self._handle);
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assert.ok(self._connecting);
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self._connecting = false;
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if (status == 0) {
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self.readable = self.writable = true;
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timers.active(self);
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handle.readStart();
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self.emit('connect');
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} else {
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self.destroy(errnoException(errno, 'connect'));
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}
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}
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function errnoException(errorno, syscall) {
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// TODO make this more compatible with ErrnoException from src/node.cc
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// Once all of Node is using this function the ErrnoException from
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// src/node.cc should be removed.
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var e = new Error(syscall + ' ' + errorno);
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e.errno = errorno;
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e.syscall = syscall;
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return e;
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}
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function Server(/* [ options, ] listener */) {
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if (!(this instanceof Server)) return new Server(arguments[0], arguments[1]);
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events.EventEmitter.call(this);
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var self = this;
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var options;
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if (typeof arguments[0] == 'function') {
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options = {};
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self.on('connection', arguments[0]);
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} else {
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options = arguments[0];
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if (typeof arguments[1] == 'function') {
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self.on('connection', arguments[1]);
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}
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}
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this.connections = 0;
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this.allowHalfOpen = options.allowHalfOpen || false;
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this._handle = new TCP();
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this._handle.socket = this;
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this._handle.onconnection = onconnection;
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}
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util.inherits(Server, events.EventEmitter);
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exports.Server = Server;
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function toPort(x) { return (x = Number(x)) >= 0 ? x : false; }
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function listenip(self, ip, port) {
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var r = 0;
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if (ip && port) {
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debug("bind to " + ip);
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r = self._handle.bind(ip, port);
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}
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if (r) {
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self.emit('error', errnoException(errno, 'listen'));
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} else {
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self._handle.listen(self._backlog || 128);
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process.nextTick(function() {
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self.emit('listening');
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});
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}
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}
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Server.prototype.listen = function() {
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var self = this;
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var lastArg = arguments[arguments.length - 1];
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if (typeof lastArg == 'function') {
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self.addListener('listening', lastArg);
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}
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var port = toPort(arguments[0]);
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if (arguments.length == 0 || typeof arguments[0] == 'function') {
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// Don't bind(). OS will assign a port with INADDR_ANY.
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// The port can be found with server.address()
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listenip(self, null, null);
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} else if (typeof arguments[1] == 'undefined' ||
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typeof arguments[1] == 'function') {
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// The first argument is the port, no IP given.
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listenip(self, '0.0.0.0', port);
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} else {
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// The first argument is the port, the second an IP
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require('dns').lookup(arguments[1], function(err, ip, addressType) {
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if (err) {
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self.emit('error', err);
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} else {
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if (addressType != 4) {
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throw new Error("ipv6 addresses not yet supported by libuv");
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}
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listenip(self, ip || '0.0.0.0', port);
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}
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});
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}
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};
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function onconnection(clientHandle) {
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var handle = this;
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var self = handle.socket;
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var socket = new Socket({
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handle: clientHandle,
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allowHalfOpen: self.allowHalfOpen
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});
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socket.readable = socket.writable = true;
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socket.resume();
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self.connections++;
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socket.server = self;
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DTRACE_NET_SERVER_CONNECTION(socket);
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self.emit('connection', socket);
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}
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Server.prototype.close = function() {
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this._handle.close();
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};
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