Press n or j to go to the next uncovered block, b, p or k for the previous block.
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126x 126x 1723x 122x 1x 1x 1x 121x 121x 121x 122x 1723x 1723x 1705x 1705x 1705x 1723x 1723x 8x 8x 10x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 1723x 1715x 1715x 1723x 1723x 126x 126x 126x 6983x 6983x 6983x 5306x 5306x 5306x 5306x 6120x 6120x 6120x 6120x 6120x 126x 126x 126x 1688x 1688x 1688x 1688x 126x 126x 126x 1x 1x 1x 1x 1x 1x 1x 1x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 10x 10x 10x 10x 10x 10x 126x 126x 126x 2x 2x 2x 2x 2x 2x 126x 126x 126x 34x 34x 34x 34x 34x 34x 126x 126x 126x 126x 126x 126x 126x 126x 3x 2x 2x 2x 2x 2x 126x 126x 126x 126x 126x 126x 126x 126x 954x 954x 126x 126x 954x 954x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x 126x | // Copyright Joyent, Inc. and other Node contributors.
//
// 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';
const {
ArrayIsArray,
ArrayPrototypeIndexOf,
Boolean,
Error,
Number,
NumberIsNaN,
NumberParseInt,
ObjectDefineProperty,
ObjectSetPrototypeOf,
Symbol,
} = primordials;
const EventEmitter = require('events');
const stream = require('stream');
let debug = require('internal/util/debuglog').debuglog('net', (fn) => {
debug = fn;
});
const {
isIP,
isIPv4,
isIPv6,
normalizedArgsSymbol,
makeSyncWrite
} = require('internal/net');
const assert = require('internal/assert');
const {
UV_EADDRINUSE,
UV_EINVAL,
UV_ENOTCONN
} = internalBinding('uv');
const { Buffer } = require('buffer');
const { guessHandleType } = internalBinding('util');
const { ShutdownWrap } = internalBinding('stream_wrap');
const {
TCP,
TCPConnectWrap,
constants: TCPConstants
} = internalBinding('tcp_wrap');
const {
Pipe,
PipeConnectWrap,
constants: PipeConstants
} = internalBinding('pipe_wrap');
const {
newAsyncId,
defaultTriggerAsyncIdScope,
symbols: { async_id_symbol, owner_symbol }
} = require('internal/async_hooks');
const {
writevGeneric,
writeGeneric,
onStreamRead,
kAfterAsyncWrite,
kHandle,
kUpdateTimer,
setStreamTimeout,
kBuffer,
kBufferCb,
kBufferGen
} = require('internal/stream_base_commons');
const {
codes: {
ERR_INVALID_ADDRESS_FAMILY,
ERR_INVALID_ARG_TYPE,
ERR_INVALID_ARG_VALUE,
ERR_INVALID_FD_TYPE,
ERR_INVALID_IP_ADDRESS,
ERR_SERVER_ALREADY_LISTEN,
ERR_SERVER_NOT_RUNNING,
ERR_SOCKET_CLOSED,
ERR_MISSING_ARGS,
},
errnoException,
exceptionWithHostPort,
uvExceptionWithHostPort
} = require('internal/errors');
const { isUint8Array } = require('internal/util/types');
const {
validateAbortSignal,
validateFunction,
validateInt32,
validateNumber,
validatePort,
validateString
} = require('internal/validators');
const kLastWriteQueueSize = Symbol('lastWriteQueueSize');
const {
DTRACE_NET_SERVER_CONNECTION,
DTRACE_NET_STREAM_END
} = require('internal/dtrace');
// Lazy loaded to improve startup performance.
let cluster;
let dns;
let BlockList;
let SocketAddress;
const { clearTimeout } = require('timers');
const { kTimeout } = require('internal/timers');
const DEFAULT_IPV4_ADDR = '0.0.0.0';
const DEFAULT_IPV6_ADDR = '::';
const isWindows = process.platform === 'win32';
const noop = () => {};
function getFlags(ipv6Only) {
return ipv6Only === true ? TCPConstants.UV_TCP_IPV6ONLY : 0;
}
function createHandle(fd, is_server) {
validateInt32(fd, 'fd', 0);
const type = guessHandleType(fd);
if (type === 'PIPE') {
return new Pipe(
is_server ? PipeConstants.SERVER : PipeConstants.SOCKET
);
}
if (type === 'TCP') {
return new TCP(
is_server ? TCPConstants.SERVER : TCPConstants.SOCKET
);
}
throw new ERR_INVALID_FD_TYPE(type);
}
function getNewAsyncId(handle) {
return (!handle || typeof handle.getAsyncId !== 'function') ?
newAsyncId() : handle.getAsyncId();
}
function isPipeName(s) {
return typeof s === 'string' && toNumber(s) === false;
}
/**
* Creates a new TCP or IPC server
* @param {{
* allowHalfOpen?: boolean;
* pauseOnConnect?: boolean;
* }} [options]
* @param {Function} [connectionListener]
* @returns {Server}
*/
function createServer(options, connectionListener) {
return new Server(options, connectionListener);
}
// Target API:
//
// let s = net.connect({port: 80, host: 'google.com'}, function() {
// ...
// });
//
// There are various forms:
//
// connect(options, [cb])
// connect(port, [host], [cb])
// connect(path, [cb]);
//
function connect(...args) {
const normalized = normalizeArgs(args);
const options = normalized[0];
debug('createConnection', normalized);
const socket = new Socket(options);
if (options.timeout) {
socket.setTimeout(options.timeout);
}
return socket.connect(normalized);
}
// Returns an array [options, cb], where options is an object,
// cb is either a function or null.
// Used to normalize arguments of Socket.prototype.connect() and
// Server.prototype.listen(). Possible combinations of parameters:
// (options[...][, cb])
// (path[...][, cb])
// ([port][, host][...][, cb])
// For Socket.prototype.connect(), the [...] part is ignored
// For Server.prototype.listen(), the [...] part is [, backlog]
// but will not be handled here (handled in listen())
function normalizeArgs(args) {
let arr;
if (args.length === 0) {
arr = [{}, null];
arr[normalizedArgsSymbol] = true;
return arr;
}
const arg0 = args[0];
let options = {};
if (typeof arg0 === 'object' && arg0 !== null) {
// (options[...][, cb])
options = arg0;
} else if (isPipeName(arg0)) {
// (path[...][, cb])
options.path = arg0;
} else {
// ([port][, host][...][, cb])
options.port = arg0;
if (args.length > 1 && typeof args[1] === 'string') {
options.host = args[1];
}
}
const cb = args[args.length - 1];
if (typeof cb !== 'function')
arr = [options, null];
else
arr = [options, cb];
arr[normalizedArgsSymbol] = true;
return arr;
}
// Called when creating new Socket, or when re-using a closed Socket
function initSocketHandle(self) {
self._undestroy();
self._sockname = null;
// Handle creation may be deferred to bind() or connect() time.
if (self._handle) {
self._handle[owner_symbol] = self;
self._handle.onread = onStreamRead;
self[async_id_symbol] = getNewAsyncId(self._handle);
let userBuf = self[kBuffer];
if (userBuf) {
const bufGen = self[kBufferGen];
if (bufGen !== null) {
userBuf = bufGen();
if (!isUint8Array(userBuf))
return;
self[kBuffer] = userBuf;
}
self._handle.useUserBuffer(userBuf);
}
}
}
const kBytesRead = Symbol('kBytesRead');
const kBytesWritten = Symbol('kBytesWritten');
const kSetNoDelay = Symbol('kSetNoDelay');
function Socket(options) {
if (!(this instanceof Socket)) return new Socket(options);
if (options?.objectMode) {
throw new ERR_INVALID_ARG_VALUE(
'options.objectMode',
options.objectMode,
'is not supported'
);
} else if (options?.readableObjectMode || options?.writableObjectMode) {
throw new ERR_INVALID_ARG_VALUE(
`options.${
options.readableObjectMode ? 'readableObjectMode' : 'writableObjectMode'
}`,
options.readableObjectMode || options.writableObjectMode,
'is not supported'
);
}
this.connecting = false;
// Problem with this is that users can supply their own handle, that may not
// have _handle.getAsyncId(). In this case an[async_id_symbol] should
// probably be supplied by async_hooks.
this[async_id_symbol] = -1;
this._hadError = false;
this[kHandle] = null;
this._parent = null;
this._host = null;
this[kSetNoDelay] = false;
this[kLastWriteQueueSize] = 0;
this[kTimeout] = null;
this[kBuffer] = null;
this[kBufferCb] = null;
this[kBufferGen] = null;
if (typeof options === 'number')
options = { fd: options }; // Legacy interface.
else
options = { ...options };
// Default to *not* allowing half open sockets.
options.allowHalfOpen = Boolean(options.allowHalfOpen);
// For backwards compat do not emit close on destroy.
options.emitClose = false;
options.autoDestroy = true;
// Handle strings directly.
options.decodeStrings = false;
stream.Duplex.call(this, options);
if (options.handle) {
this._handle = options.handle; // private
this[async_id_symbol] = getNewAsyncId(this._handle);
} else if (options.fd !== undefined) {
const { fd } = options;
let err;
// createHandle will throw ERR_INVALID_FD_TYPE if `fd` is not
// a valid `PIPE` or `TCP` descriptor
this._handle = createHandle(fd, false);
err = this._handle.open(fd);
// While difficult to fabricate, in some architectures
// `open` may return an error code for valid file descriptors
// which cannot be opened. This is difficult to test as most
// un-openable fds will throw on `createHandle`
if (err)
throw errnoException(err, 'open');
this[async_id_symbol] = this._handle.getAsyncId();
if ((fd === 1 || fd === 2) &&
(this._handle instanceof Pipe) && isWindows) {
// Make stdout and stderr blocking on Windows
err = this._handle.setBlocking(true);
if (err)
throw errnoException(err, 'setBlocking');
this._writev = null;
this._write = makeSyncWrite(fd);
// makeSyncWrite adjusts this value like the original handle would, so
// we need to let it do that by turning it into a writable, own
// property.
ObjectDefineProperty(this._handle, 'bytesWritten', {
value: 0, writable: true
});
}
}
const onread = options.onread;
if (onread !== null && typeof onread === 'object' &&
(isUint8Array(onread.buffer) || typeof onread.buffer === 'function') &&
typeof onread.callback === 'function') {
if (typeof onread.buffer === 'function') {
this[kBuffer] = true;
this[kBufferGen] = onread.buffer;
} else {
this[kBuffer] = onread.buffer;
}
this[kBufferCb] = onread.callback;
}
// Shut down the socket when we're finished with it.
this.on('end', onReadableStreamEnd);
initSocketHandle(this);
this._pendingData = null;
this._pendingEncoding = '';
// If we have a handle, then start the flow of data into the
// buffer. if not, then this will happen when we connect
if (this._handle && options.readable !== false) {
if (options.pauseOnCreate) {
// Stop the handle from reading and pause the stream
this._handle.reading = false;
this._handle.readStop();
this.readableFlowing = false;
} else if (!options.manualStart) {
this.read(0);
}
}
// Reserve properties
this.server = null;
this._server = null;
// Used after `.destroy()`
this[kBytesRead] = 0;
this[kBytesWritten] = 0;
}
ObjectSetPrototypeOf(Socket.prototype, stream.Duplex.prototype);
ObjectSetPrototypeOf(Socket, stream.Duplex);
// Refresh existing timeouts.
Socket.prototype._unrefTimer = function _unrefTimer() {
for (let s = this; s !== null; s = s._parent) {
if (s[kTimeout])
s[kTimeout].refresh();
}
};
// The user has called .end(), and all the bytes have been
// sent out to the other side.
Socket.prototype._final = function(cb) {
// If still connecting - defer handling `_final` until 'connect' will happen
if (this.pending) {
debug('_final: not yet connected');
return this.once('connect', () => this._final(cb));
}
if (!this._handle)
return cb();
debug('_final: not ended, call shutdown()');
const req = new ShutdownWrap();
req.oncomplete = afterShutdown;
req.handle = this._handle;
req.callback = cb;
const err = this._handle.shutdown(req);
if (err === 1 || err === UV_ENOTCONN) // synchronous finish
return cb();
else if (err !== 0)
return cb(errnoException(err, 'shutdown'));
};
function afterShutdown() {
const self = this.handle[owner_symbol];
debug('afterShutdown destroyed=%j', self.destroyed,
self._readableState);
this.callback();
}
// Provide a better error message when we call end() as a result
// of the other side sending a FIN. The standard 'write after end'
// is overly vague, and makes it seem like the user's code is to blame.
function writeAfterFIN(chunk, encoding, cb) {
if (!this.writableEnded) {
return stream.Duplex.prototype.write.call(this, chunk, encoding, cb);
}
if (typeof encoding === 'function') {
cb = encoding;
encoding = null;
}
// eslint-disable-next-line no-restricted-syntax
const er = new Error('This socket has been ended by the other party');
er.code = 'EPIPE';
if (typeof cb === 'function') {
defaultTriggerAsyncIdScope(this[async_id_symbol], process.nextTick, cb, er);
}
this.destroy(er);
return false;
}
Socket.prototype.setTimeout = setStreamTimeout;
Socket.prototype._onTimeout = function() {
const handle = this._handle;
const lastWriteQueueSize = this[kLastWriteQueueSize];
if (lastWriteQueueSize > 0 && handle) {
// `lastWriteQueueSize !== writeQueueSize` means there is
// an active write in progress, so we suppress the timeout.
const { writeQueueSize } = handle;
if (lastWriteQueueSize !== writeQueueSize) {
this[kLastWriteQueueSize] = writeQueueSize;
this._unrefTimer();
return;
}
}
debug('_onTimeout');
this.emit('timeout');
};
Socket.prototype.setNoDelay = function(enable) {
if (!this._handle) {
this.once('connect',
enable ? this.setNoDelay : () => this.setNoDelay(enable));
return this;
}
// Backwards compatibility: assume true when `enable` is omitted
const newValue = enable === undefined ? true : !!enable;
if (this._handle.setNoDelay && newValue !== this[kSetNoDelay]) {
this[kSetNoDelay] = newValue;
this._handle.setNoDelay(newValue);
}
return this;
};
Socket.prototype.setKeepAlive = function(setting, msecs) {
if (!this._handle) {
this.once('connect', () => this.setKeepAlive(setting, msecs));
return this;
}
if (this._handle.setKeepAlive)
this._handle.setKeepAlive(setting, ~~(msecs / 1000));
return this;
};
Socket.prototype.address = function() {
return this._getsockname();
};
ObjectDefineProperty(Socket.prototype, '_connecting', {
get: function() {
return this.connecting;
}
});
ObjectDefineProperty(Socket.prototype, 'pending', {
get() {
return !this._handle || this.connecting;
},
configurable: true
});
ObjectDefineProperty(Socket.prototype, 'readyState', {
get: function() {
if (this.connecting) {
return 'opening';
} else if (this.readable && this.writable) {
return 'open';
} else if (this.readable && !this.writable) {
return 'readOnly';
} else if (!this.readable && this.writable) {
return 'writeOnly';
}
return 'closed';
}
});
ObjectDefineProperty(Socket.prototype, 'bufferSize', {
get: function() {
if (this._handle) {
return this.writableLength;
}
}
});
ObjectDefineProperty(Socket.prototype, kUpdateTimer, {
get: function() {
return this._unrefTimer;
}
});
function tryReadStart(socket) {
// Not already reading, start the flow
debug('Socket._handle.readStart');
socket._handle.reading = true;
const err = socket._handle.readStart();
if (err)
socket.destroy(errnoException(err, 'read'));
}
// Just call handle.readStart until we have enough in the buffer
Socket.prototype._read = function(n) {
debug('_read');
if (this.connecting || !this._handle) {
debug('_read wait for connection');
this.once('connect', () => this._read(n));
} else if (!this._handle.reading) {
tryReadStart(this);
}
};
Socket.prototype.end = function(data, encoding, callback) {
stream.Duplex.prototype.end.call(this,
data, encoding, callback);
DTRACE_NET_STREAM_END(this);
return this;
};
Socket.prototype.pause = function() {
if (this[kBuffer] && !this.connecting && this._handle &&
this._handle.reading) {
this._handle.reading = false;
if (!this.destroyed) {
const err = this._handle.readStop();
if (err)
this.destroy(errnoException(err, 'read'));
}
}
return stream.Duplex.prototype.pause.call(this);
};
Socket.prototype.resume = function() {
if (this[kBuffer] && !this.connecting && this._handle &&
!this._handle.reading) {
tryReadStart(this);
}
return stream.Duplex.prototype.resume.call(this);
};
Socket.prototype.read = function(n) {
if (this[kBuffer] && !this.connecting && this._handle &&
!this._handle.reading) {
tryReadStart(this);
}
return stream.Duplex.prototype.read.call(this, n);
};
// Called when the 'end' event is emitted.
function onReadableStreamEnd() {
if (!this.allowHalfOpen) {
this.write = writeAfterFIN;
}
}
Socket.prototype.destroySoon = function() {
if (this.writable)
this.end();
if (this.writableFinished)
this.destroy();
else
this.once('finish', this.destroy);
};
Socket.prototype._destroy = function(exception, cb) {
debug('destroy');
this.connecting = false;
for (let s = this; s !== null; s = s._parent) {
clearTimeout(s[kTimeout]);
}
debug('close');
if (this._handle) {
if (this !== process.stderr)
debug('close handle');
const isException = exception ? true : false;
// `bytesRead` and `kBytesWritten` should be accessible after `.destroy()`
this[kBytesRead] = this._handle.bytesRead;
this[kBytesWritten] = this._handle.bytesWritten;
this._handle.close(() => {
debug('emit close');
this.emit('close', isException);
});
this._handle.onread = noop;
this._handle = null;
this._sockname = null;
cb(exception);
} else {
cb(exception);
process.nextTick(emitCloseNT, this);
}
if (this._server) {
debug('has server');
this._server._connections--;
if (this._server._emitCloseIfDrained) {
this._server._emitCloseIfDrained();
}
}
};
Socket.prototype._getpeername = function() {
if (!this._handle || !this._handle.getpeername) {
return this._peername || {};
} else if (!this._peername) {
this._peername = {};
// FIXME(bnoordhuis) Throw when the return value is not 0?
this._handle.getpeername(this._peername);
}
return this._peername;
};
function protoGetter(name, callback) {
ObjectDefineProperty(Socket.prototype, name, {
configurable: false,
enumerable: true,
get: callback
});
}
protoGetter('bytesRead', function bytesRead() {
return this._handle ? this._handle.bytesRead : this[kBytesRead];
});
protoGetter('remoteAddress', function remoteAddress() {
return this._getpeername().address;
});
protoGetter('remoteFamily', function remoteFamily() {
return this._getpeername().family;
});
protoGetter('remotePort', function remotePort() {
return this._getpeername().port;
});
Socket.prototype._getsockname = function() {
if (!this._handle || !this._handle.getsockname) {
return {};
} else if (!this._sockname) {
this._sockname = {};
// FIXME(bnoordhuis) Throw when the return value is not 0?
this._handle.getsockname(this._sockname);
}
return this._sockname;
};
protoGetter('localAddress', function localAddress() {
return this._getsockname().address;
});
protoGetter('localPort', function localPort() {
return this._getsockname().port;
});
Socket.prototype[kAfterAsyncWrite] = function() {
this[kLastWriteQueueSize] = 0;
};
Socket.prototype._writeGeneric = function(writev, data, encoding, cb) {
// If we are still connecting, then buffer this for later.
// The Writable logic will buffer up any more writes while
// waiting for this one to be done.
if (this.connecting) {
this._pendingData = data;
this._pendingEncoding = encoding;
this.once('connect', function connect() {
this._writeGeneric(writev, data, encoding, cb);
});
return;
}
this._pendingData = null;
this._pendingEncoding = '';
if (!this._handle) {
cb(new ERR_SOCKET_CLOSED());
return false;
}
this._unrefTimer();
let req;
if (writev)
req = writevGeneric(this, data, cb);
else
req = writeGeneric(this, data, encoding, cb);
if (req.async)
this[kLastWriteQueueSize] = req.bytes;
};
Socket.prototype._writev = function(chunks, cb) {
this._writeGeneric(true, chunks, '', cb);
};
Socket.prototype._write = function(data, encoding, cb) {
this._writeGeneric(false, data, encoding, cb);
};
// Legacy alias. Having this is probably being overly cautious, but it doesn't
// really hurt anyone either. This can probably be removed safely if desired.
protoGetter('_bytesDispatched', function _bytesDispatched() {
return this._handle ? this._handle.bytesWritten : this[kBytesWritten];
});
protoGetter('bytesWritten', function bytesWritten() {
let bytes = this._bytesDispatched;
const data = this._pendingData;
const encoding = this._pendingEncoding;
const writableBuffer = this.writableBuffer;
if (!writableBuffer)
return undefined;
for (const el of writableBuffer) {
bytes += el.chunk instanceof Buffer ?
el.chunk.length :
Buffer.byteLength(el.chunk, el.encoding);
}
if (ArrayIsArray(data)) {
// Was a writev, iterate over chunks to get total length
for (let i = 0; i < data.length; i++) {
const chunk = data[i];
if (data.allBuffers || chunk instanceof Buffer)
bytes += chunk.length;
else
bytes += Buffer.byteLength(chunk.chunk, chunk.encoding);
}
} else if (data) {
// Writes are either a string or a Buffer.
if (typeof data !== 'string')
bytes += data.length;
else
bytes += Buffer.byteLength(data, encoding);
}
return bytes;
});
function checkBindError(err, port, handle) {
// EADDRINUSE may not be reported until we call listen() or connect().
// To complicate matters, a failed bind() followed by listen() or connect()
// will implicitly bind to a random port. Ergo, check that the socket is
// bound to the expected port before calling listen() or connect().
//
// FIXME(bnoordhuis) Doesn't work for pipe handles, they don't have a
// getsockname() method. Non-issue for now, the cluster module doesn't
// really support pipes anyway.
if (err === 0 && port > 0 && handle.getsockname) {
const out = {};
err = handle.getsockname(out);
if (err === 0 && port !== out.port) {
debug(`checkBindError, bound to ${out.port} instead of ${port}`);
err = UV_EADDRINUSE;
}
}
return err;
}
function internalConnect(
self, address, port, addressType, localAddress, localPort, flags) {
// TODO return promise from Socket.prototype.connect which
// wraps _connectReq.
assert(self.connecting);
let err;
if (localAddress || localPort) {
if (addressType === 4) {
localAddress = localAddress || DEFAULT_IPV4_ADDR;
err = self._handle.bind(localAddress, localPort);
} else { // addressType === 6
localAddress = localAddress || DEFAULT_IPV6_ADDR;
err = self._handle.bind6(localAddress, localPort, flags);
}
debug('binding to localAddress: %s and localPort: %d (addressType: %d)',
localAddress, localPort, addressType);
err = checkBindError(err, localPort, self._handle);
if (err) {
const ex = exceptionWithHostPort(err, 'bind', localAddress, localPort);
self.destroy(ex);
return;
}
}
if (addressType === 6 || addressType === 4) {
const req = new TCPConnectWrap();
req.oncomplete = afterConnect;
req.address = address;
req.port = port;
req.localAddress = localAddress;
req.localPort = localPort;
if (addressType === 4)
err = self._handle.connect(req, address, port);
else
err = self._handle.connect6(req, address, port);
} else {
const req = new PipeConnectWrap();
req.address = address;
req.oncomplete = afterConnect;
err = self._handle.connect(req, address, afterConnect);
}
if (err) {
const sockname = self._getsockname();
let details;
if (sockname) {
details = sockname.address + ':' + sockname.port;
}
const ex = exceptionWithHostPort(err, 'connect', address, port, details);
self.destroy(ex);
}
}
Socket.prototype.connect = function(...args) {
let normalized;
// If passed an array, it's treated as an array of arguments that have
// already been normalized (so we don't normalize more than once). This has
// been solved before in https://github.com/nodejs/node/pull/12342, but was
// reverted as it had unintended side effects.
if (ArrayIsArray(args[0]) && args[0][normalizedArgsSymbol]) {
normalized = args[0];
} else {
normalized = normalizeArgs(args);
}
const options = normalized[0];
const cb = normalized[1];
// options.port === null will be checked later.
if (options.port === undefined && options.path == null)
throw new ERR_MISSING_ARGS(['options', 'port', 'path']);
if (this.write !== Socket.prototype.write)
this.write = Socket.prototype.write;
if (this.destroyed) {
this._handle = null;
this._peername = null;
this._sockname = null;
}
const { path } = options;
const pipe = !!path;
debug('pipe', pipe, path);
if (!this._handle) {
this._handle = pipe ?
new Pipe(PipeConstants.SOCKET) :
new TCP(TCPConstants.SOCKET);
initSocketHandle(this);
}
if (cb !== null) {
this.once('connect', cb);
}
this._unrefTimer();
this.connecting = true;
if (pipe) {
validateString(path, 'options.path');
defaultTriggerAsyncIdScope(
this[async_id_symbol], internalConnect, this, path
);
} else {
lookupAndConnect(this, options);
}
return this;
};
function lookupAndConnect(self, options) {
const { localAddress, localPort } = options;
const host = options.host || 'localhost';
let { port } = options;
if (localAddress && !isIP(localAddress)) {
throw new ERR_INVALID_IP_ADDRESS(localAddress);
}
if (localPort) {
validateNumber(localPort, 'options.localPort');
}
if (typeof port !== 'undefined') {
if (typeof port !== 'number' && typeof port !== 'string') {
throw new ERR_INVALID_ARG_TYPE('options.port',
['number', 'string'], port);
}
validatePort(port);
}
port |= 0;
// If host is an IP, skip performing a lookup
const addressType = isIP(host);
if (addressType) {
defaultTriggerAsyncIdScope(self[async_id_symbol], process.nextTick, () => {
if (self.connecting)
defaultTriggerAsyncIdScope(
self[async_id_symbol],
internalConnect,
self, host, port, addressType, localAddress, localPort
);
});
return;
}
if (options.lookup !== undefined)
validateFunction(options.lookup, 'options.lookup');
if (dns === undefined) dns = require('dns');
const dnsopts = {
family: options.family,
hints: options.hints || 0
};
if (!isWindows &&
dnsopts.family !== 4 &&
dnsopts.family !== 6 &&
dnsopts.hints === 0) {
dnsopts.hints = dns.ADDRCONFIG;
}
debug('connect: find host', host);
debug('connect: dns options', dnsopts);
self._host = host;
const lookup = options.lookup || dns.lookup;
defaultTriggerAsyncIdScope(self[async_id_symbol], function() {
lookup(host, dnsopts, function emitLookup(err, ip, addressType) {
self.emit('lookup', err, ip, addressType, host);
// It's possible we were destroyed while looking this up.
// XXX it would be great if we could cancel the promise returned by
// the look up.
if (!self.connecting) return;
if (err) {
// net.createConnection() creates a net.Socket object and immediately
// calls net.Socket.connect() on it (that's us). There are no event
// listeners registered yet so defer the error event to the next tick.
process.nextTick(connectErrorNT, self, err);
} else if (!isIP(ip)) {
err = new ERR_INVALID_IP_ADDRESS(ip);
process.nextTick(connectErrorNT, self, err);
} else if (addressType !== 4 && addressType !== 6) {
err = new ERR_INVALID_ADDRESS_FAMILY(addressType,
options.host,
options.port);
process.nextTick(connectErrorNT, self, err);
} else {
self._unrefTimer();
defaultTriggerAsyncIdScope(
self[async_id_symbol],
internalConnect,
self, ip, port, addressType, localAddress, localPort
);
}
});
});
}
function connectErrorNT(self, err) {
self.destroy(err);
}
Socket.prototype.ref = function() {
if (!this._handle) {
this.once('connect', this.ref);
return this;
}
if (typeof this._handle.ref === 'function') {
this._handle.ref();
}
return this;
};
Socket.prototype.unref = function() {
if (!this._handle) {
this.once('connect', this.unref);
return this;
}
if (typeof this._handle.unref === 'function') {
this._handle.unref();
}
return this;
};
function afterConnect(status, handle, req, readable, writable) {
const self = handle[owner_symbol];
// Callback may come after call to destroy
if (self.destroyed) {
return;
}
debug('afterConnect');
assert(self.connecting);
self.connecting = false;
self._sockname = null;
if (status === 0) {
if (self.readable && !readable) {
self.push(null);
self.read();
}
if (self.writable && !writable) {
self.end();
}
self._unrefTimer();
self.emit('connect');
self.emit('ready');
// Start the first read, or get an immediate EOF.
// this doesn't actually consume any bytes, because len=0.
if (readable && !self.isPaused())
self.read(0);
} else {
self.connecting = false;
let details;
if (req.localAddress && req.localPort) {
details = req.localAddress + ':' + req.localPort;
}
const ex = exceptionWithHostPort(status,
'connect',
req.address,
req.port,
details);
if (details) {
ex.localAddress = req.localAddress;
ex.localPort = req.localPort;
}
self.destroy(ex);
}
}
function addAbortSignalOption(self, options) {
if (options?.signal === undefined) {
return;
}
validateAbortSignal(options.signal, 'options.signal');
const { signal } = options;
const onAborted = () => {
self.close();
};
if (signal.aborted) {
process.nextTick(onAborted);
} else {
signal.addEventListener('abort', onAborted);
self.once('close', () => signal.removeEventListener('abort', onAborted));
}
}
function Server(options, connectionListener) {
if (!(this instanceof Server))
return new Server(options, connectionListener);
EventEmitter.call(this);
if (typeof options === 'function') {
connectionListener = options;
options = {};
this.on('connection', connectionListener);
} else if (options == null || typeof options === 'object') {
options = { ...options };
if (typeof connectionListener === 'function') {
this.on('connection', connectionListener);
}
} else {
throw new ERR_INVALID_ARG_TYPE('options', 'Object', options);
}
this._connections = 0;
this[async_id_symbol] = -1;
this._handle = null;
this._usingWorkers = false;
this._workers = [];
this._unref = false;
this.allowHalfOpen = options.allowHalfOpen || false;
this.pauseOnConnect = !!options.pauseOnConnect;
}
ObjectSetPrototypeOf(Server.prototype, EventEmitter.prototype);
ObjectSetPrototypeOf(Server, EventEmitter);
function toNumber(x) { return (x = Number(x)) >= 0 ? x : false; }
// Returns handle if it can be created, or error code if it can't
function createServerHandle(address, port, addressType, fd, flags) {
let err = 0;
// Assign handle in listen, and clean up if bind or listen fails
let handle;
let isTCP = false;
if (typeof fd === 'number' && fd >= 0) {
try {
handle = createHandle(fd, true);
} catch (e) {
// Not a fd we can listen on. This will trigger an error.
debug('listen invalid fd=%d:', fd, e.message);
return UV_EINVAL;
}
err = handle.open(fd);
if (err)
return err;
assert(!address && !port);
} else if (port === -1 && addressType === -1) {
handle = new Pipe(PipeConstants.SERVER);
if (isWindows) {
const instances = NumberParseInt(process.env.NODE_PENDING_PIPE_INSTANCES);
if (!NumberIsNaN(instances)) {
handle.setPendingInstances(instances);
}
}
} else {
handle = new TCP(TCPConstants.SERVER);
isTCP = true;
}
if (address || port || isTCP) {
debug('bind to', address || 'any');
if (!address) {
// Try binding to ipv6 first
err = handle.bind6(DEFAULT_IPV6_ADDR, port, flags);
if (err) {
handle.close();
// Fallback to ipv4
return createServerHandle(DEFAULT_IPV4_ADDR, port);
}
} else if (addressType === 6) {
err = handle.bind6(address, port, flags);
} else {
err = handle.bind(address, port);
}
}
if (err) {
handle.close();
return err;
}
return handle;
}
function setupListenHandle(address, port, addressType, backlog, fd, flags) {
debug('setupListenHandle', address, port, addressType, backlog, fd);
// If there is not yet a handle, we need to create one and bind.
// In the case of a server sent via IPC, we don't need to do this.
if (this._handle) {
debug('setupListenHandle: have a handle already');
} else {
debug('setupListenHandle: create a handle');
let rval = null;
// Try to bind to the unspecified IPv6 address, see if IPv6 is available
if (!address && typeof fd !== 'number') {
rval = createServerHandle(DEFAULT_IPV6_ADDR, port, 6, fd, flags);
if (typeof rval === 'number') {
rval = null;
address = DEFAULT_IPV4_ADDR;
addressType = 4;
} else {
address = DEFAULT_IPV6_ADDR;
addressType = 6;
}
}
if (rval === null)
rval = createServerHandle(address, port, addressType, fd, flags);
if (typeof rval === 'number') {
const error = uvExceptionWithHostPort(rval, 'listen', address, port);
process.nextTick(emitErrorNT, this, error);
return;
}
this._handle = rval;
}
this[async_id_symbol] = getNewAsyncId(this._handle);
this._handle.onconnection = onconnection;
this._handle[owner_symbol] = this;
// Use a backlog of 512 entries. We pass 511 to the listen() call because
// the kernel does: backlogsize = roundup_pow_of_two(backlogsize + 1);
// which will thus give us a backlog of 512 entries.
const err = this._handle.listen(backlog || 511);
if (err) {
const ex = uvExceptionWithHostPort(err, 'listen', address, port);
this._handle.close();
this._handle = null;
defaultTriggerAsyncIdScope(this[async_id_symbol],
process.nextTick,
emitErrorNT,
this,
ex);
return;
}
// Generate connection key, this should be unique to the connection
this._connectionKey = addressType + ':' + address + ':' + port;
// Unref the handle if the server was unref'ed prior to listening
if (this._unref)
this.unref();
defaultTriggerAsyncIdScope(this[async_id_symbol],
process.nextTick,
emitListeningNT,
this);
}
Server.prototype._listen2 = setupListenHandle; // legacy alias
function emitErrorNT(self, err) {
self.emit('error', err);
}
function emitListeningNT(self) {
// Ensure handle hasn't closed
if (self._handle)
self.emit('listening');
}
function listenInCluster(server, address, port, addressType,
backlog, fd, exclusive, flags) {
exclusive = !!exclusive;
if (cluster === undefined) cluster = require('cluster');
if (cluster.isPrimary || exclusive) {
// Will create a new handle
// _listen2 sets up the listened handle, it is still named like this
// to avoid breaking code that wraps this method
server._listen2(address, port, addressType, backlog, fd, flags);
return;
}
const serverQuery = {
address: address,
port: port,
addressType: addressType,
fd: fd,
flags,
};
// Get the primary's server handle, and listen on it
cluster._getServer(server, serverQuery, listenOnPrimaryHandle);
function listenOnPrimaryHandle(err, handle) {
err = checkBindError(err, port, handle);
if (err) {
const ex = exceptionWithHostPort(err, 'bind', address, port);
return server.emit('error', ex);
}
// Reuse primary's server handle
server._handle = handle;
// _listen2 sets up the listened handle, it is still named like this
// to avoid breaking code that wraps this method
server._listen2(address, port, addressType, backlog, fd, flags);
}
}
Server.prototype.listen = function(...args) {
const normalized = normalizeArgs(args);
let options = normalized[0];
const cb = normalized[1];
if (this._handle) {
throw new ERR_SERVER_ALREADY_LISTEN();
}
if (cb !== null) {
this.once('listening', cb);
}
const backlogFromArgs =
// (handle, backlog) or (path, backlog) or (port, backlog)
toNumber(args.length > 1 && args[1]) ||
toNumber(args.length > 2 && args[2]); // (port, host, backlog)
options = options._handle || options.handle || options;
const flags = getFlags(options.ipv6Only);
// (handle[, backlog][, cb]) where handle is an object with a handle
if (options instanceof TCP) {
this._handle = options;
this[async_id_symbol] = this._handle.getAsyncId();
listenInCluster(this, null, -1, -1, backlogFromArgs);
return this;
}
addAbortSignalOption(this, options);
// (handle[, backlog][, cb]) where handle is an object with a fd
if (typeof options.fd === 'number' && options.fd >= 0) {
listenInCluster(this, null, null, null, backlogFromArgs, options.fd);
return this;
}
// ([port][, host][, backlog][, cb]) where port is omitted,
// that is, listen(), listen(null), listen(cb), or listen(null, cb)
// or (options[, cb]) where options.port is explicitly set as undefined or
// null, bind to an arbitrary unused port
if (args.length === 0 || typeof args[0] === 'function' ||
(typeof options.port === 'undefined' && 'port' in options) ||
options.port === null) {
options.port = 0;
}
// ([port][, host][, backlog][, cb]) where port is specified
// or (options[, cb]) where options.port is specified
// or if options.port is normalized as 0 before
let backlog;
if (typeof options.port === 'number' || typeof options.port === 'string') {
validatePort(options.port, 'options.port');
backlog = options.backlog || backlogFromArgs;
// start TCP server listening on host:port
if (options.host) {
lookupAndListen(this, options.port | 0, options.host, backlog,
options.exclusive, flags);
} else { // Undefined host, listens on unspecified address
// Default addressType 4 will be used to search for primary server
listenInCluster(this, null, options.port | 0, 4,
backlog, undefined, options.exclusive);
}
return this;
}
// (path[, backlog][, cb]) or (options[, cb])
// where path or options.path is a UNIX domain socket or Windows pipe
if (options.path && isPipeName(options.path)) {
const pipeName = this._pipeName = options.path;
backlog = options.backlog || backlogFromArgs;
listenInCluster(this, pipeName, -1, -1,
backlog, undefined, options.exclusive);
if (!this._handle) {
// Failed and an error shall be emitted in the next tick.
// Therefore, we directly return.
return this;
}
let mode = 0;
if (options.readableAll === true)
mode |= PipeConstants.UV_READABLE;
if (options.writableAll === true)
mode |= PipeConstants.UV_WRITABLE;
if (mode !== 0) {
const err = this._handle.fchmod(mode);
if (err) {
this._handle.close();
this._handle = null;
throw errnoException(err, 'uv_pipe_chmod');
}
}
return this;
}
if (!(('port' in options) || ('path' in options))) {
throw new ERR_INVALID_ARG_VALUE('options', options,
'must have the property "port" or "path"');
}
throw new ERR_INVALID_ARG_VALUE('options', options);
};
function lookupAndListen(self, port, address, backlog, exclusive, flags) {
if (dns === undefined) dns = require('dns');
dns.lookup(address, function doListen(err, ip, addressType) {
if (err) {
self.emit('error', err);
} else {
addressType = ip ? addressType : 4;
listenInCluster(self, ip, port, addressType,
backlog, undefined, exclusive, flags);
}
});
}
ObjectDefineProperty(Server.prototype, 'listening', {
get: function() {
return !!this._handle;
},
configurable: true,
enumerable: true
});
Server.prototype.address = function() {
if (this._handle && this._handle.getsockname) {
const out = {};
const err = this._handle.getsockname(out);
if (err) {
throw errnoException(err, 'address');
}
return out;
} else if (this._pipeName) {
return this._pipeName;
}
return null;
};
function onconnection(err, clientHandle) {
const handle = this;
const self = handle[owner_symbol];
debug('onconnection');
if (err) {
self.emit('error', errnoException(err, 'accept'));
return;
}
if (self.maxConnections && self._connections >= self.maxConnections) {
clientHandle.close();
return;
}
const socket = new Socket({
handle: clientHandle,
allowHalfOpen: self.allowHalfOpen,
pauseOnCreate: self.pauseOnConnect,
readable: true,
writable: true
});
self._connections++;
socket.server = self;
socket._server = self;
DTRACE_NET_SERVER_CONNECTION(socket);
self.emit('connection', socket);
}
/**
* Gets the number of concurrent connections on the server
* @param {Function} cb
* @returns {Server}
*/
Server.prototype.getConnections = function(cb) {
const self = this;
function end(err, connections) {
defaultTriggerAsyncIdScope(self[async_id_symbol],
process.nextTick,
cb,
err,
connections);
}
if (!this._usingWorkers) {
end(null, this._connections);
return this;
}
// Poll workers
let left = this._workers.length;
let total = this._connections;
function oncount(err, count) {
if (err) {
left = -1;
return end(err);
}
total += count;
if (--left === 0) return end(null, total);
}
for (let n = 0; n < this._workers.length; n++) {
this._workers[n].getConnections(oncount);
}
return this;
};
Server.prototype.close = function(cb) {
if (typeof cb === 'function') {
if (!this._handle) {
this.once('close', function close() {
cb(new ERR_SERVER_NOT_RUNNING());
});
} else {
this.once('close', cb);
}
}
if (this._handle) {
this._handle.close();
this._handle = null;
}
if (this._usingWorkers) {
let left = this._workers.length;
const onWorkerClose = () => {
if (--left !== 0) return;
this._connections = 0;
this._emitCloseIfDrained();
};
// Increment connections to be sure that, even if all sockets will be closed
// during polling of workers, `close` event will be emitted only once.
this._connections++;
// Poll workers
for (let n = 0; n < this._workers.length; n++)
this._workers[n].close(onWorkerClose);
} else {
this._emitCloseIfDrained();
}
return this;
};
Server.prototype._emitCloseIfDrained = function() {
debug('SERVER _emitCloseIfDrained');
if (this._handle || this._connections) {
debug('SERVER handle? %j connections? %d',
!!this._handle, this._connections);
return;
}
defaultTriggerAsyncIdScope(this[async_id_symbol],
process.nextTick,
emitCloseNT,
this);
};
function emitCloseNT(self) {
debug('SERVER: emit close');
self.emit('close');
}
Server.prototype[EventEmitter.captureRejectionSymbol] = function(
err, event, sock) {
switch (event) {
case 'connection':
sock.destroy(err);
break;
default:
this.emit('error', err);
}
};
// Legacy alias on the C++ wrapper object. This is not public API, so we may
// want to runtime-deprecate it at some point. There's no hurry, though.
ObjectDefineProperty(TCP.prototype, 'owner', {
get() { return this[owner_symbol]; },
set(v) { return this[owner_symbol] = v; }
});
ObjectDefineProperty(Socket.prototype, '_handle', {
get() { return this[kHandle]; },
set(v) { return this[kHandle] = v; }
});
Server.prototype._setupWorker = function(socketList) {
this._usingWorkers = true;
this._workers.push(socketList);
socketList.once('exit', (socketList) => {
const index = ArrayPrototypeIndexOf(this._workers, socketList);
this._workers.splice(index, 1);
});
};
Server.prototype.ref = function() {
this._unref = false;
if (this._handle)
this._handle.ref();
return this;
};
Server.prototype.unref = function() {
this._unref = true;
if (this._handle)
this._handle.unref();
return this;
};
let _setSimultaneousAccepts;
let warnSimultaneousAccepts = true;
if (isWindows) {
let simultaneousAccepts;
_setSimultaneousAccepts = function(handle) {
if (warnSimultaneousAccepts) {
process.emitWarning(
'net._setSimultaneousAccepts() is deprecated and will be removed.',
'DeprecationWarning', 'DEP0121');
warnSimultaneousAccepts = false;
}
if (handle === undefined) {
return;
}
if (simultaneousAccepts === undefined) {
simultaneousAccepts = (process.env.NODE_MANY_ACCEPTS &&
process.env.NODE_MANY_ACCEPTS !== '0');
}
if (handle._simultaneousAccepts !== simultaneousAccepts) {
handle.setSimultaneousAccepts(!!simultaneousAccepts);
handle._simultaneousAccepts = simultaneousAccepts;
}
};
} else {
_setSimultaneousAccepts = function() {
if (warnSimultaneousAccepts) {
process.emitWarning(
'net._setSimultaneousAccepts() is deprecated and will be removed.',
'DeprecationWarning', 'DEP0121');
warnSimultaneousAccepts = false;
}
};
}
module.exports = {
_createServerHandle: createServerHandle,
_normalizeArgs: normalizeArgs,
_setSimultaneousAccepts,
get BlockList() {
BlockList ??= require('internal/blocklist').BlockList;
return BlockList;
},
get SocketAddress() {
SocketAddress ??= require('internal/socketaddress').SocketAddress;
return SocketAddress;
},
connect,
createConnection: connect,
createServer,
isIP: isIP,
isIPv4: isIPv4,
isIPv6: isIPv6,
Server,
Socket,
Stream: Socket, // Legacy naming
};
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