Index: node_modules/socks/build/client/socksclient.js =================================================================== --- node_modules/socks/build/client/socksclient.js (revision 81bc7da776d8cda42939ef4ab350c88d13b4941f) +++ node_modules/socks/build/client/socksclient.js (revision 81bc7da776d8cda42939ef4ab350c88d13b4941f) @@ -0,0 +1,793 @@ +"use strict"; +var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) { + function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); } + return new (P || (P = Promise))(function (resolve, reject) { + function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } } + function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } } + function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); } + step((generator = generator.apply(thisArg, _arguments || [])).next()); + }); +}; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.SocksClientError = exports.SocksClient = void 0; +const events_1 = require("events"); +const net = require("net"); +const smart_buffer_1 = require("smart-buffer"); +const constants_1 = require("../common/constants"); +const helpers_1 = require("../common/helpers"); +const receivebuffer_1 = require("../common/receivebuffer"); +const util_1 = require("../common/util"); +Object.defineProperty(exports, "SocksClientError", { enumerable: true, get: function () { return util_1.SocksClientError; } }); +const ip_address_1 = require("ip-address"); +class SocksClient extends events_1.EventEmitter { + constructor(options) { + super(); + this.options = Object.assign({}, options); + // Validate SocksClientOptions + (0, helpers_1.validateSocksClientOptions)(options); + // Default state + this.setState(constants_1.SocksClientState.Created); + } + /** + * Creates a new SOCKS connection. + * + * Note: Supports callbacks and promises. Only supports the connect command. + * @param options { SocksClientOptions } Options. + * @param callback { Function } An optional callback function. + * @returns { Promise } + */ + static createConnection(options, callback) { + return new Promise((resolve, reject) => { + // Validate SocksClientOptions + try { + (0, helpers_1.validateSocksClientOptions)(options, ['connect']); + } + catch (err) { + if (typeof callback === 'function') { + callback(err); + // eslint-disable-next-line @typescript-eslint/no-explicit-any + return resolve(err); // Resolves pending promise (prevents memory leaks). + } + else { + return reject(err); + } + } + const client = new SocksClient(options); + client.connect(options.existing_socket); + client.once('established', (info) => { + client.removeAllListeners(); + if (typeof callback === 'function') { + callback(null, info); + resolve(info); // Resolves pending promise (prevents memory leaks). + } + else { + resolve(info); + } + }); + // Error occurred, failed to establish connection. + client.once('error', (err) => { + client.removeAllListeners(); + if (typeof callback === 'function') { + callback(err); + // eslint-disable-next-line @typescript-eslint/no-explicit-any + resolve(err); // Resolves pending promise (prevents memory leaks). + } + else { + reject(err); + } + }); + }); + } + /** + * Creates a new SOCKS connection chain to a destination host through 2 or more SOCKS proxies. + * + * Note: Supports callbacks and promises. Only supports the connect method. + * Note: Implemented via createConnection() factory function. + * @param options { SocksClientChainOptions } Options + * @param callback { Function } An optional callback function. + * @returns { Promise } + */ + static createConnectionChain(options, callback) { + // eslint-disable-next-line no-async-promise-executor + return new Promise((resolve, reject) => __awaiter(this, void 0, void 0, function* () { + // Validate SocksClientChainOptions + try { + (0, helpers_1.validateSocksClientChainOptions)(options); + } + catch (err) { + if (typeof callback === 'function') { + callback(err); + // eslint-disable-next-line @typescript-eslint/no-explicit-any + return resolve(err); // Resolves pending promise (prevents memory leaks). + } + else { + return reject(err); + } + } + // Shuffle proxies + if (options.randomizeChain) { + (0, util_1.shuffleArray)(options.proxies); + } + try { + let sock; + for (let i = 0; i < options.proxies.length; i++) { + const nextProxy = options.proxies[i]; + // If we've reached the last proxy in the chain, the destination is the actual destination, otherwise it's the next proxy. + const nextDestination = i === options.proxies.length - 1 + ? options.destination + : { + host: options.proxies[i + 1].host || + options.proxies[i + 1].ipaddress, + port: options.proxies[i + 1].port, + }; + // Creates the next connection in the chain. + const result = yield SocksClient.createConnection({ + command: 'connect', + proxy: nextProxy, + destination: nextDestination, + existing_socket: sock, + }); + // If sock is undefined, assign it here. + sock = sock || result.socket; + } + if (typeof callback === 'function') { + callback(null, { socket: sock }); + resolve({ socket: sock }); // Resolves pending promise (prevents memory leaks). + } + else { + resolve({ socket: sock }); + } + } + catch (err) { + if (typeof callback === 'function') { + callback(err); + // eslint-disable-next-line @typescript-eslint/no-explicit-any + resolve(err); // Resolves pending promise (prevents memory leaks). + } + else { + reject(err); + } + } + })); + } + /** + * Creates a SOCKS UDP Frame. + * @param options + */ + static createUDPFrame(options) { + const buff = new smart_buffer_1.SmartBuffer(); + buff.writeUInt16BE(0); + buff.writeUInt8(options.frameNumber || 0); + // IPv4/IPv6/Hostname + if (net.isIPv4(options.remoteHost.host)) { + buff.writeUInt8(constants_1.Socks5HostType.IPv4); + buff.writeUInt32BE((0, helpers_1.ipv4ToInt32)(options.remoteHost.host)); + } + else if (net.isIPv6(options.remoteHost.host)) { + buff.writeUInt8(constants_1.Socks5HostType.IPv6); + buff.writeBuffer((0, helpers_1.ipToBuffer)(options.remoteHost.host)); + } + else { + buff.writeUInt8(constants_1.Socks5HostType.Hostname); + buff.writeUInt8(Buffer.byteLength(options.remoteHost.host)); + buff.writeString(options.remoteHost.host); + } + // Port + buff.writeUInt16BE(options.remoteHost.port); + // Data + buff.writeBuffer(options.data); + return buff.toBuffer(); + } + /** + * Parses a SOCKS UDP frame. + * @param data + */ + static parseUDPFrame(data) { + const buff = smart_buffer_1.SmartBuffer.fromBuffer(data); + buff.readOffset = 2; + const frameNumber = buff.readUInt8(); + const hostType = buff.readUInt8(); + let remoteHost; + if (hostType === constants_1.Socks5HostType.IPv4) { + remoteHost = (0, helpers_1.int32ToIpv4)(buff.readUInt32BE()); + } + else if (hostType === constants_1.Socks5HostType.IPv6) { + remoteHost = ip_address_1.Address6.fromByteArray(Array.from(buff.readBuffer(16))).canonicalForm(); + } + else { + remoteHost = buff.readString(buff.readUInt8()); + } + const remotePort = buff.readUInt16BE(); + return { + frameNumber, + remoteHost: { + host: remoteHost, + port: remotePort, + }, + data: buff.readBuffer(), + }; + } + /** + * Internal state setter. If the SocksClient is in an error state, it cannot be changed to a non error state. + */ + setState(newState) { + if (this.state !== constants_1.SocksClientState.Error) { + this.state = newState; + } + } + /** + * Starts the connection establishment to the proxy and destination. + * @param existingSocket Connected socket to use instead of creating a new one (internal use). + */ + connect(existingSocket) { + this.onDataReceived = (data) => this.onDataReceivedHandler(data); + this.onClose = () => this.onCloseHandler(); + this.onError = (err) => this.onErrorHandler(err); + this.onConnect = () => this.onConnectHandler(); + // Start timeout timer (defaults to 30 seconds) + const timer = setTimeout(() => this.onEstablishedTimeout(), this.options.timeout || constants_1.DEFAULT_TIMEOUT); + // check whether unref is available as it differs from browser to NodeJS (#33) + if (timer.unref && typeof timer.unref === 'function') { + timer.unref(); + } + // If an existing socket is provided, use it to negotiate SOCKS handshake. Otherwise create a new Socket. + if (existingSocket) { + this.socket = existingSocket; + } + else { + this.socket = new net.Socket(); + } + // Attach Socket error handlers. + this.socket.once('close', this.onClose); + this.socket.once('error', this.onError); + this.socket.once('connect', this.onConnect); + this.socket.on('data', this.onDataReceived); + this.setState(constants_1.SocksClientState.Connecting); + this.receiveBuffer = new receivebuffer_1.ReceiveBuffer(); + if (existingSocket) { + this.socket.emit('connect'); + } + else { + this.socket.connect(this.getSocketOptions()); + if (this.options.set_tcp_nodelay !== undefined && + this.options.set_tcp_nodelay !== null) { + this.socket.setNoDelay(!!this.options.set_tcp_nodelay); + } + } + // Listen for established event so we can re-emit any excess data received during handshakes. + this.prependOnceListener('established', (info) => { + setImmediate(() => { + if (this.receiveBuffer.length > 0) { + const excessData = this.receiveBuffer.get(this.receiveBuffer.length); + info.socket.emit('data', excessData); + } + info.socket.resume(); + }); + }); + } + // Socket options (defaults host/port to options.proxy.host/options.proxy.port) + getSocketOptions() { + return Object.assign(Object.assign({}, this.options.socket_options), { host: this.options.proxy.host || this.options.proxy.ipaddress, port: this.options.proxy.port }); + } + /** + * Handles internal Socks timeout callback. + * Note: If the Socks client is not BoundWaitingForConnection or Established, the connection will be closed. + */ + onEstablishedTimeout() { + if (this.state !== constants_1.SocksClientState.Established && + this.state !== constants_1.SocksClientState.BoundWaitingForConnection) { + this.closeSocket(constants_1.ERRORS.ProxyConnectionTimedOut); + } + } + /** + * Handles Socket connect event. + */ + onConnectHandler() { + this.setState(constants_1.SocksClientState.Connected); + // Send initial handshake. + if (this.options.proxy.type === 4) { + this.sendSocks4InitialHandshake(); + } + else { + this.sendSocks5InitialHandshake(); + } + this.setState(constants_1.SocksClientState.SentInitialHandshake); + } + /** + * Handles Socket data event. + * @param data + */ + onDataReceivedHandler(data) { + /* + All received data is appended to a ReceiveBuffer. + This makes sure that all the data we need is received before we attempt to process it. + */ + this.receiveBuffer.append(data); + // Process data that we have. + this.processData(); + } + /** + * Handles processing of the data we have received. + */ + processData() { + // If we have enough data to process the next step in the SOCKS handshake, proceed. + while (this.state !== constants_1.SocksClientState.Established && + this.state !== constants_1.SocksClientState.Error && + this.receiveBuffer.length >= this.nextRequiredPacketBufferSize) { + // Sent initial handshake, waiting for response. + if (this.state === constants_1.SocksClientState.SentInitialHandshake) { + if (this.options.proxy.type === 4) { + // Socks v4 only has one handshake response. + this.handleSocks4FinalHandshakeResponse(); + } + else { + // Socks v5 has two handshakes, handle initial one here. + this.handleInitialSocks5HandshakeResponse(); + } + // Sent auth request for Socks v5, waiting for response. + } + else if (this.state === constants_1.SocksClientState.SentAuthentication) { + this.handleInitialSocks5AuthenticationHandshakeResponse(); + // Sent final Socks v5 handshake, waiting for final response. + } + else if (this.state === constants_1.SocksClientState.SentFinalHandshake) { + this.handleSocks5FinalHandshakeResponse(); + // Socks BIND established. Waiting for remote connection via proxy. + } + else if (this.state === constants_1.SocksClientState.BoundWaitingForConnection) { + if (this.options.proxy.type === 4) { + this.handleSocks4IncomingConnectionResponse(); + } + else { + this.handleSocks5IncomingConnectionResponse(); + } + } + else { + this.closeSocket(constants_1.ERRORS.InternalError); + break; + } + } + } + /** + * Handles Socket close event. + * @param had_error + */ + onCloseHandler() { + this.closeSocket(constants_1.ERRORS.SocketClosed); + } + /** + * Handles Socket error event. + * @param err + */ + onErrorHandler(err) { + this.closeSocket(err.message); + } + /** + * Removes internal event listeners on the underlying Socket. + */ + removeInternalSocketHandlers() { + // Pauses data flow of the socket (this is internally resumed after 'established' is emitted) + this.socket.pause(); + this.socket.removeListener('data', this.onDataReceived); + this.socket.removeListener('close', this.onClose); + this.socket.removeListener('error', this.onError); + this.socket.removeListener('connect', this.onConnect); + } + /** + * Closes and destroys the underlying Socket. Emits an error event. + * @param err { String } An error string to include in error event. + */ + closeSocket(err) { + // Make sure only one 'error' event is fired for the lifetime of this SocksClient instance. + if (this.state !== constants_1.SocksClientState.Error) { + // Set internal state to Error. + this.setState(constants_1.SocksClientState.Error); + // Destroy Socket + this.socket.destroy(); + // Remove internal listeners + this.removeInternalSocketHandlers(); + // Fire 'error' event. + this.emit('error', new util_1.SocksClientError(err, this.options)); + } + } + /** + * Sends initial Socks v4 handshake request. + */ + sendSocks4InitialHandshake() { + const userId = this.options.proxy.userId || ''; + const buff = new smart_buffer_1.SmartBuffer(); + buff.writeUInt8(0x04); + buff.writeUInt8(constants_1.SocksCommand[this.options.command]); + buff.writeUInt16BE(this.options.destination.port); + // Socks 4 (IPv4) + if (net.isIPv4(this.options.destination.host)) { + buff.writeBuffer((0, helpers_1.ipToBuffer)(this.options.destination.host)); + buff.writeStringNT(userId); + // Socks 4a (hostname) + } + else { + buff.writeUInt8(0x00); + buff.writeUInt8(0x00); + buff.writeUInt8(0x00); + buff.writeUInt8(0x01); + buff.writeStringNT(userId); + buff.writeStringNT(this.options.destination.host); + } + this.nextRequiredPacketBufferSize = + constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks4Response; + this.socket.write(buff.toBuffer()); + } + /** + * Handles Socks v4 handshake response. + * @param data + */ + handleSocks4FinalHandshakeResponse() { + const data = this.receiveBuffer.get(8); + if (data[1] !== constants_1.Socks4Response.Granted) { + this.closeSocket(`${constants_1.ERRORS.Socks4ProxyRejectedConnection} - (${constants_1.Socks4Response[data[1]]})`); + } + else { + // Bind response + if (constants_1.SocksCommand[this.options.command] === constants_1.SocksCommand.bind) { + const buff = smart_buffer_1.SmartBuffer.fromBuffer(data); + buff.readOffset = 2; + const remoteHost = { + port: buff.readUInt16BE(), + host: (0, helpers_1.int32ToIpv4)(buff.readUInt32BE()), + }; + // If host is 0.0.0.0, set to proxy host. + if (remoteHost.host === '0.0.0.0') { + remoteHost.host = this.options.proxy.ipaddress; + } + this.setState(constants_1.SocksClientState.BoundWaitingForConnection); + this.emit('bound', { remoteHost, socket: this.socket }); + // Connect response + } + else { + this.setState(constants_1.SocksClientState.Established); + this.removeInternalSocketHandlers(); + this.emit('established', { socket: this.socket }); + } + } + } + /** + * Handles Socks v4 incoming connection request (BIND) + * @param data + */ + handleSocks4IncomingConnectionResponse() { + const data = this.receiveBuffer.get(8); + if (data[1] !== constants_1.Socks4Response.Granted) { + this.closeSocket(`${constants_1.ERRORS.Socks4ProxyRejectedIncomingBoundConnection} - (${constants_1.Socks4Response[data[1]]})`); + } + else { + const buff = smart_buffer_1.SmartBuffer.fromBuffer(data); + buff.readOffset = 2; + const remoteHost = { + port: buff.readUInt16BE(), + host: (0, helpers_1.int32ToIpv4)(buff.readUInt32BE()), + }; + this.setState(constants_1.SocksClientState.Established); + this.removeInternalSocketHandlers(); + this.emit('established', { remoteHost, socket: this.socket }); + } + } + /** + * Sends initial Socks v5 handshake request. + */ + sendSocks5InitialHandshake() { + const buff = new smart_buffer_1.SmartBuffer(); + // By default we always support no auth. + const supportedAuthMethods = [constants_1.Socks5Auth.NoAuth]; + // We should only tell the proxy we support user/pass auth if auth info is actually provided. + // Note: As of Tor v0.3.5.7+, if user/pass auth is an option from the client, by default it will always take priority. + if (this.options.proxy.userId || this.options.proxy.password) { + supportedAuthMethods.push(constants_1.Socks5Auth.UserPass); + } + // Custom auth method? + if (this.options.proxy.custom_auth_method !== undefined) { + supportedAuthMethods.push(this.options.proxy.custom_auth_method); + } + // Build handshake packet + buff.writeUInt8(0x05); + buff.writeUInt8(supportedAuthMethods.length); + for (const authMethod of supportedAuthMethods) { + buff.writeUInt8(authMethod); + } + this.nextRequiredPacketBufferSize = + constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5InitialHandshakeResponse; + this.socket.write(buff.toBuffer()); + this.setState(constants_1.SocksClientState.SentInitialHandshake); + } + /** + * Handles initial Socks v5 handshake response. + * @param data + */ + handleInitialSocks5HandshakeResponse() { + const data = this.receiveBuffer.get(2); + if (data[0] !== 0x05) { + this.closeSocket(constants_1.ERRORS.InvalidSocks5IntiailHandshakeSocksVersion); + } + else if (data[1] === constants_1.SOCKS5_NO_ACCEPTABLE_AUTH) { + this.closeSocket(constants_1.ERRORS.InvalidSocks5InitialHandshakeNoAcceptedAuthType); + } + else { + // If selected Socks v5 auth method is no auth, send final handshake request. + if (data[1] === constants_1.Socks5Auth.NoAuth) { + this.socks5ChosenAuthType = constants_1.Socks5Auth.NoAuth; + this.sendSocks5CommandRequest(); + // If selected Socks v5 auth method is user/password, send auth handshake. + } + else if (data[1] === constants_1.Socks5Auth.UserPass) { + this.socks5ChosenAuthType = constants_1.Socks5Auth.UserPass; + this.sendSocks5UserPassAuthentication(); + // If selected Socks v5 auth method is the custom_auth_method, send custom handshake. + } + else if (data[1] === this.options.proxy.custom_auth_method) { + this.socks5ChosenAuthType = this.options.proxy.custom_auth_method; + this.sendSocks5CustomAuthentication(); + } + else { + this.closeSocket(constants_1.ERRORS.InvalidSocks5InitialHandshakeUnknownAuthType); + } + } + } + /** + * Sends Socks v5 user & password auth handshake. + * + * Note: No auth and user/pass are currently supported. + */ + sendSocks5UserPassAuthentication() { + const userId = this.options.proxy.userId || ''; + const password = this.options.proxy.password || ''; + const buff = new smart_buffer_1.SmartBuffer(); + buff.writeUInt8(0x01); + buff.writeUInt8(Buffer.byteLength(userId)); + buff.writeString(userId); + buff.writeUInt8(Buffer.byteLength(password)); + buff.writeString(password); + this.nextRequiredPacketBufferSize = + constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5UserPassAuthenticationResponse; + this.socket.write(buff.toBuffer()); + this.setState(constants_1.SocksClientState.SentAuthentication); + } + sendSocks5CustomAuthentication() { + return __awaiter(this, void 0, void 0, function* () { + this.nextRequiredPacketBufferSize = + this.options.proxy.custom_auth_response_size; + this.socket.write(yield this.options.proxy.custom_auth_request_handler()); + this.setState(constants_1.SocksClientState.SentAuthentication); + }); + } + handleSocks5CustomAuthHandshakeResponse(data) { + return __awaiter(this, void 0, void 0, function* () { + return yield this.options.proxy.custom_auth_response_handler(data); + }); + } + handleSocks5AuthenticationNoAuthHandshakeResponse(data) { + return __awaiter(this, void 0, void 0, function* () { + return data[1] === 0x00; + }); + } + handleSocks5AuthenticationUserPassHandshakeResponse(data) { + return __awaiter(this, void 0, void 0, function* () { + return data[1] === 0x00; + }); + } + /** + * Handles Socks v5 auth handshake response. + * @param data + */ + handleInitialSocks5AuthenticationHandshakeResponse() { + return __awaiter(this, void 0, void 0, function* () { + this.setState(constants_1.SocksClientState.ReceivedAuthenticationResponse); + let authResult = false; + if (this.socks5ChosenAuthType === constants_1.Socks5Auth.NoAuth) { + authResult = yield this.handleSocks5AuthenticationNoAuthHandshakeResponse(this.receiveBuffer.get(2)); + } + else if (this.socks5ChosenAuthType === constants_1.Socks5Auth.UserPass) { + authResult = + yield this.handleSocks5AuthenticationUserPassHandshakeResponse(this.receiveBuffer.get(2)); + } + else if (this.socks5ChosenAuthType === this.options.proxy.custom_auth_method) { + authResult = yield this.handleSocks5CustomAuthHandshakeResponse(this.receiveBuffer.get(this.options.proxy.custom_auth_response_size)); + } + if (!authResult) { + this.closeSocket(constants_1.ERRORS.Socks5AuthenticationFailed); + } + else { + this.sendSocks5CommandRequest(); + } + }); + } + /** + * Sends Socks v5 final handshake request. + */ + sendSocks5CommandRequest() { + const buff = new smart_buffer_1.SmartBuffer(); + buff.writeUInt8(0x05); + buff.writeUInt8(constants_1.SocksCommand[this.options.command]); + buff.writeUInt8(0x00); + // ipv4, ipv6, domain? + if (net.isIPv4(this.options.destination.host)) { + buff.writeUInt8(constants_1.Socks5HostType.IPv4); + buff.writeBuffer((0, helpers_1.ipToBuffer)(this.options.destination.host)); + } + else if (net.isIPv6(this.options.destination.host)) { + buff.writeUInt8(constants_1.Socks5HostType.IPv6); + buff.writeBuffer((0, helpers_1.ipToBuffer)(this.options.destination.host)); + } + else { + buff.writeUInt8(constants_1.Socks5HostType.Hostname); + buff.writeUInt8(this.options.destination.host.length); + buff.writeString(this.options.destination.host); + } + buff.writeUInt16BE(this.options.destination.port); + this.nextRequiredPacketBufferSize = + constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseHeader; + this.socket.write(buff.toBuffer()); + this.setState(constants_1.SocksClientState.SentFinalHandshake); + } + /** + * Handles Socks v5 final handshake response. + * @param data + */ + handleSocks5FinalHandshakeResponse() { + // Peek at available data (we need at least 5 bytes to get the hostname length) + const header = this.receiveBuffer.peek(5); + if (header[0] !== 0x05 || header[1] !== constants_1.Socks5Response.Granted) { + this.closeSocket(`${constants_1.ERRORS.InvalidSocks5FinalHandshakeRejected} - ${constants_1.Socks5Response[header[1]]}`); + } + else { + // Read address type + const addressType = header[3]; + let remoteHost; + let buff; + // IPv4 + if (addressType === constants_1.Socks5HostType.IPv4) { + // Check if data is available. + const dataNeeded = constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseIPv4; + if (this.receiveBuffer.length < dataNeeded) { + this.nextRequiredPacketBufferSize = dataNeeded; + return; + } + buff = smart_buffer_1.SmartBuffer.fromBuffer(this.receiveBuffer.get(dataNeeded).slice(4)); + remoteHost = { + host: (0, helpers_1.int32ToIpv4)(buff.readUInt32BE()), + port: buff.readUInt16BE(), + }; + // If given host is 0.0.0.0, assume remote proxy ip instead. + if (remoteHost.host === '0.0.0.0') { + remoteHost.host = this.options.proxy.ipaddress; + } + // Hostname + } + else if (addressType === constants_1.Socks5HostType.Hostname) { + const hostLength = header[4]; + const dataNeeded = constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseHostname(hostLength); // header + host length + host + port + // Check if data is available. + if (this.receiveBuffer.length < dataNeeded) { + this.nextRequiredPacketBufferSize = dataNeeded; + return; + } + buff = smart_buffer_1.SmartBuffer.fromBuffer(this.receiveBuffer.get(dataNeeded).slice(5)); + remoteHost = { + host: buff.readString(hostLength), + port: buff.readUInt16BE(), + }; + // IPv6 + } + else if (addressType === constants_1.Socks5HostType.IPv6) { + // Check if data is available. + const dataNeeded = constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseIPv6; + if (this.receiveBuffer.length < dataNeeded) { + this.nextRequiredPacketBufferSize = dataNeeded; + return; + } + buff = smart_buffer_1.SmartBuffer.fromBuffer(this.receiveBuffer.get(dataNeeded).slice(4)); + remoteHost = { + host: ip_address_1.Address6.fromByteArray(Array.from(buff.readBuffer(16))).canonicalForm(), + port: buff.readUInt16BE(), + }; + } + // We have everything we need + this.setState(constants_1.SocksClientState.ReceivedFinalResponse); + // If using CONNECT, the client is now in the established state. + if (constants_1.SocksCommand[this.options.command] === constants_1.SocksCommand.connect) { + this.setState(constants_1.SocksClientState.Established); + this.removeInternalSocketHandlers(); + this.emit('established', { remoteHost, socket: this.socket }); + } + else if (constants_1.SocksCommand[this.options.command] === constants_1.SocksCommand.bind) { + /* If using BIND, the Socks client is now in BoundWaitingForConnection state. + This means that the remote proxy server is waiting for a remote connection to the bound port. */ + this.setState(constants_1.SocksClientState.BoundWaitingForConnection); + this.nextRequiredPacketBufferSize = + constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseHeader; + this.emit('bound', { remoteHost, socket: this.socket }); + /* + If using Associate, the Socks client is now Established. And the proxy server is now accepting UDP packets at the + given bound port. This initial Socks TCP connection must remain open for the UDP relay to continue to work. + */ + } + else if (constants_1.SocksCommand[this.options.command] === constants_1.SocksCommand.associate) { + this.setState(constants_1.SocksClientState.Established); + this.removeInternalSocketHandlers(); + this.emit('established', { + remoteHost, + socket: this.socket, + }); + } + } + } + /** + * Handles Socks v5 incoming connection request (BIND). + */ + handleSocks5IncomingConnectionResponse() { + // Peek at available data (we need at least 5 bytes to get the hostname length) + const header = this.receiveBuffer.peek(5); + if (header[0] !== 0x05 || header[1] !== constants_1.Socks5Response.Granted) { + this.closeSocket(`${constants_1.ERRORS.Socks5ProxyRejectedIncomingBoundConnection} - ${constants_1.Socks5Response[header[1]]}`); + } + else { + // Read address type + const addressType = header[3]; + let remoteHost; + let buff; + // IPv4 + if (addressType === constants_1.Socks5HostType.IPv4) { + // Check if data is available. + const dataNeeded = constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseIPv4; + if (this.receiveBuffer.length < dataNeeded) { + this.nextRequiredPacketBufferSize = dataNeeded; + return; + } + buff = smart_buffer_1.SmartBuffer.fromBuffer(this.receiveBuffer.get(dataNeeded).slice(4)); + remoteHost = { + host: (0, helpers_1.int32ToIpv4)(buff.readUInt32BE()), + port: buff.readUInt16BE(), + }; + // If given host is 0.0.0.0, assume remote proxy ip instead. + if (remoteHost.host === '0.0.0.0') { + remoteHost.host = this.options.proxy.ipaddress; + } + // Hostname + } + else if (addressType === constants_1.Socks5HostType.Hostname) { + const hostLength = header[4]; + const dataNeeded = constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseHostname(hostLength); // header + host length + port + // Check if data is available. + if (this.receiveBuffer.length < dataNeeded) { + this.nextRequiredPacketBufferSize = dataNeeded; + return; + } + buff = smart_buffer_1.SmartBuffer.fromBuffer(this.receiveBuffer.get(dataNeeded).slice(5)); + remoteHost = { + host: buff.readString(hostLength), + port: buff.readUInt16BE(), + }; + // IPv6 + } + else if (addressType === constants_1.Socks5HostType.IPv6) { + // Check if data is available. + const dataNeeded = constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseIPv6; + if (this.receiveBuffer.length < dataNeeded) { + this.nextRequiredPacketBufferSize = dataNeeded; + return; + } + buff = smart_buffer_1.SmartBuffer.fromBuffer(this.receiveBuffer.get(dataNeeded).slice(4)); + remoteHost = { + host: ip_address_1.Address6.fromByteArray(Array.from(buff.readBuffer(16))).canonicalForm(), + port: buff.readUInt16BE(), + }; + } + this.setState(constants_1.SocksClientState.Established); + this.removeInternalSocketHandlers(); + this.emit('established', { remoteHost, socket: this.socket }); + } + } + get socksClientOptions() { + return Object.assign({}, this.options); + } +} +exports.SocksClient = SocksClient; +//# sourceMappingURL=socksclient.js.map Index: node_modules/socks/build/client/socksclient.js.map =================================================================== --- node_modules/socks/build/client/socksclient.js.map (revision 81bc7da776d8cda42939ef4ab350c88d13b4941f) +++ node_modules/socks/build/client/socksclient.js.map (revision 81bc7da776d8cda42939ef4ab350c88d13b4941f) @@ -0,0 +1,1 @@ 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