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* first action! (#1)
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718
node_modules/socks/build/client/socksclient.js
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vendored
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718
node_modules/socks/build/client/socksclient.js
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vendored
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@ -0,0 +1,718 @@
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"use strict";
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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const events_1 = require("events");
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const net = require("net");
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const ip = require("ip");
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const smart_buffer_1 = require("smart-buffer");
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const constants_1 = require("../common/constants");
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const helpers_1 = require("../common/helpers");
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const receivebuffer_1 = require("../common/receivebuffer");
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const util_1 = require("../common/util");
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class SocksClient extends events_1.EventEmitter {
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constructor(options) {
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super();
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this._options = Object.assign({}, options);
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// Validate SocksClientOptions
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helpers_1.validateSocksClientOptions(options);
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// Default state
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this.state = constants_1.SocksClientState.Created;
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}
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/**
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* Creates a new SOCKS connection.
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*
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* Note: Supports callbacks and promises. Only supports the connect command.
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* @param options { SocksClientOptions } Options.
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* @param callback { Function } An optional callback function.
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* @returns { Promise }
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*/
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static createConnection(options, callback) {
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// Validate SocksClientOptions
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helpers_1.validateSocksClientOptions(options, ['connect']);
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return new Promise((resolve, reject) => {
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const client = new SocksClient(options);
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client.connect(options.existing_socket);
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client.once('established', (info) => {
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client.removeAllListeners();
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if (typeof callback === 'function') {
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callback(null, info);
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resolve(); // Resolves pending promise (prevents memory leaks).
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}
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else {
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resolve(info);
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}
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});
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// Error occurred, failed to establish connection.
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client.once('error', (err) => {
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client.removeAllListeners();
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if (typeof callback === 'function') {
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callback(err);
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resolve(); // Resolves pending promise (prevents memory leaks).
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}
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else {
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reject(err);
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}
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});
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});
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}
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/**
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* Creates a new SOCKS connection chain to a destination host through 2 or more SOCKS proxies.
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*
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* Note: Supports callbacks and promises. Only supports the connect method.
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* Note: Implemented via createConnection() factory function.
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* @param options { SocksClientChainOptions } Options
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* @param callback { Function } An optional callback function.
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* @returns { Promise }
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*/
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static createConnectionChain(options, callback) {
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// Validate SocksClientChainOptions
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helpers_1.validateSocksClientChainOptions(options);
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// Shuffle proxies
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if (options.randomizeChain) {
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util_1.shuffleArray(options.proxies);
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}
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return new Promise((resolve, reject) => __awaiter(this, void 0, void 0, function* () {
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let sock;
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try {
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for (let i = 0; i < options.proxies.length; i++) {
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const nextProxy = options.proxies[i];
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// If we've reached the last proxy in the chain, the destination is the actual destination, otherwise it's the next proxy.
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const nextDestination = i === options.proxies.length - 1
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? options.destination
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: {
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host: options.proxies[i + 1].ipaddress,
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port: options.proxies[i + 1].port
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};
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// Creates the next connection in the chain.
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const result = yield SocksClient.createConnection({
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command: 'connect',
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proxy: nextProxy,
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destination: nextDestination
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// Initial connection ignores this as sock is undefined. Subsequent connections re-use the first proxy socket to form a chain.
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});
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// If sock is undefined, assign it here.
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if (!sock) {
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sock = result.socket;
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}
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}
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if (typeof callback === 'function') {
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callback(null, { socket: sock });
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resolve(); // Resolves pending promise (prevents memory leaks).
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}
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else {
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resolve({ socket: sock });
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}
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}
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catch (err) {
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if (typeof callback === 'function') {
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callback(err);
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resolve(); // Resolves pending promise (prevents memory leaks).
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}
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else {
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reject(err);
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}
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}
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}));
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}
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/**
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* Creates a SOCKS UDP Frame.
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* @param options
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*/
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static createUDPFrame(options) {
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const buff = new smart_buffer_1.SmartBuffer();
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buff.writeUInt16BE(0);
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buff.writeUInt8(options.frameNumber || 0);
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// IPv4/IPv6/Hostname
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if (net.isIPv4(options.remoteHost.host)) {
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buff.writeUInt8(constants_1.Socks5HostType.IPv4);
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buff.writeUInt32BE(ip.toLong(options.remoteHost.host));
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}
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else if (net.isIPv6(options.remoteHost.host)) {
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buff.writeUInt8(constants_1.Socks5HostType.IPv6);
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buff.writeBuffer(ip.toBuffer(options.remoteHost.host));
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}
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else {
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buff.writeUInt8(constants_1.Socks5HostType.Hostname);
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buff.writeUInt8(Buffer.byteLength(options.remoteHost.host));
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buff.writeString(options.remoteHost.host);
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}
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// Port
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buff.writeUInt16BE(options.remoteHost.port);
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// Data
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buff.writeBuffer(options.data);
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return buff.toBuffer();
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}
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/**
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* Parses a SOCKS UDP frame.
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* @param data
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*/
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static parseUDPFrame(data) {
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const buff = smart_buffer_1.SmartBuffer.fromBuffer(data);
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buff.readOffset = 2;
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const frameNumber = buff.readUInt8();
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const hostType = buff.readUInt8();
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let remoteHost;
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if (hostType === constants_1.Socks5HostType.IPv4) {
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remoteHost = ip.fromLong(buff.readUInt32BE());
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}
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else if (hostType === constants_1.Socks5HostType.IPv6) {
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remoteHost = ip.toString(buff.readBuffer(16));
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}
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else {
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remoteHost = buff.readString(buff.readUInt8());
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}
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const remotePort = buff.readUInt16BE();
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return {
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frameNumber,
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remoteHost: {
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host: remoteHost,
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port: remotePort
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},
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data: buff.readBuffer()
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};
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}
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/**
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* Gets the SocksClient internal state.
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*/
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get state() {
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return this._state;
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}
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/**
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* Internal state setter. If the SocksClient is in an error state, it cannot be changed to a non error state.
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*/
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set state(newState) {
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if (this._state !== constants_1.SocksClientState.Error) {
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this._state = newState;
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}
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}
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/**
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* Starts the connection establishment to the proxy and destination.
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* @param existing_socket Connected socket to use instead of creating a new one (internal use).
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*/
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connect(existing_socket) {
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this._onDataReceived = (data) => this.onDataReceived(data);
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this._onClose = () => this.onClose();
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this._onError = (err) => this.onError(err);
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this._onConnect = () => this.onConnect();
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// Start timeout timer (defaults to 30 seconds)
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const timer = setTimeout(() => this.onEstablishedTimeout(), this._options.timeout || constants_1.DEFAULT_TIMEOUT);
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// check whether unref is available as it differs from browser to NodeJS (#33)
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if (timer.unref && typeof timer.unref === 'function') {
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timer.unref();
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}
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// If an existing socket is provided, use it to negotiate SOCKS handshake. Otherwise create a new Socket.
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if (existing_socket) {
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this._socket = existing_socket;
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}
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else {
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this._socket = new net.Socket();
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}
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// Attach Socket error handlers.
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this._socket.once('close', this._onClose);
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this._socket.once('error', this._onError);
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this._socket.once('connect', this._onConnect);
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this._socket.on('data', this._onDataReceived);
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this.state = constants_1.SocksClientState.Connecting;
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this._receiveBuffer = new receivebuffer_1.ReceiveBuffer();
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if (existing_socket) {
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this._socket.emit('connect');
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}
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else {
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this._socket.connect(this._options.proxy.port, this._options.proxy.host || this._options.proxy.ipaddress);
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if (this._options.set_tcp_nodelay !== undefined &&
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this._options.set_tcp_nodelay !== null) {
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this._socket.setNoDelay(!!this._options.set_tcp_nodelay);
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}
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}
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// Listen for established event so we can re-emit any excess data received during handshakes.
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this.prependOnceListener('established', info => {
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setImmediate(() => {
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if (this._receiveBuffer.length > 0) {
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const excessData = this._receiveBuffer.get(this._receiveBuffer.length);
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info.socket.emit('data', excessData);
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}
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info.socket.resume();
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});
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});
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}
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/**
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* Handles internal Socks timeout callback.
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* Note: If the Socks client is not BoundWaitingForConnection or Established, the connection will be closed.
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*/
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onEstablishedTimeout() {
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if (this.state !== constants_1.SocksClientState.Established &&
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this.state !== constants_1.SocksClientState.BoundWaitingForConnection) {
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this._closeSocket(constants_1.ERRORS.ProxyConnectionTimedOut);
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}
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}
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/**
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* Handles Socket connect event.
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*/
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onConnect() {
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this.state = constants_1.SocksClientState.Connected;
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// Send initial handshake.
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if (this._options.proxy.type === 4) {
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this.sendSocks4InitialHandshake();
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}
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else {
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this.sendSocks5InitialHandshake();
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}
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this.state = constants_1.SocksClientState.SentInitialHandshake;
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}
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/**
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* Handles Socket data event.
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* @param data
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*/
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onDataReceived(data) {
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/*
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All received data is appended to a ReceiveBuffer.
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This makes sure that all the data we need is received before we attempt to process it.
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*/
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this._receiveBuffer.append(data);
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// Process data that we have.
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this.processData();
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}
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/**
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* Handles processing of the data we have received.
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*/
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processData() {
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// If we have enough data to process the next step in the SOCKS handshake, proceed.
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if (this._receiveBuffer.length >= this._nextRequiredPacketBufferSize) {
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// Sent initial handshake, waiting for response.
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if (this.state === constants_1.SocksClientState.SentInitialHandshake) {
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if (this._options.proxy.type === 4) {
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// Socks v4 only has one handshake response.
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this.handleSocks4FinalHandshakeResponse();
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}
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else {
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// Socks v5 has two handshakes, handle initial one here.
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this.handleInitialSocks5HandshakeResponse();
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}
|
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// Sent auth request for Socks v5, waiting for response.
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}
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else if (this.state === constants_1.SocksClientState.SentAuthentication) {
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this.handleInitialSocks5AuthenticationHandshakeResponse();
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// Sent final Socks v5 handshake, waiting for final response.
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}
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else if (this.state === constants_1.SocksClientState.SentFinalHandshake) {
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this.handleSocks5FinalHandshakeResponse();
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// Socks BIND established. Waiting for remote connection via proxy.
|
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}
|
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else if (this.state === constants_1.SocksClientState.BoundWaitingForConnection) {
|
||||
if (this._options.proxy.type === 4) {
|
||||
this.handleSocks4IncomingConnectionResponse();
|
||||
}
|
||||
else {
|
||||
this.handleSocks5IncomingConnectionResponse();
|
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}
|
||||
}
|
||||
else if (this.state === constants_1.SocksClientState.Established) {
|
||||
// do nothing (prevents closing of the socket)
|
||||
}
|
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else {
|
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this._closeSocket(constants_1.ERRORS.InternalError);
|
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}
|
||||
}
|
||||
}
|
||||
/**
|
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* Handles Socket close event.
|
||||
* @param had_error
|
||||
*/
|
||||
onClose() {
|
||||
this._closeSocket(constants_1.ERRORS.SocketClosed);
|
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}
|
||||
/**
|
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* Handles Socket error event.
|
||||
* @param err
|
||||
*/
|
||||
onError(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.state = 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(ip.toBuffer(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: ip.fromLong(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.state = constants_1.SocksClientState.BoundWaitingForConnection;
|
||||
this.emit('bound', { socket: this._socket, remoteHost });
|
||||
// Connect response
|
||||
}
|
||||
else {
|
||||
this.state = 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: ip.fromLong(buff.readUInt32BE())
|
||||
};
|
||||
this.state = constants_1.SocksClientState.Established;
|
||||
this.removeInternalSocketHandlers();
|
||||
this.emit('established', { socket: this._socket, remoteHost });
|
||||
}
|
||||
}
|
||||
/**
|
||||
* Sends initial Socks v5 handshake request.
|
||||
*/
|
||||
sendSocks5InitialHandshake() {
|
||||
const buff = new smart_buffer_1.SmartBuffer();
|
||||
buff.writeUInt8(0x05);
|
||||
// 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) {
|
||||
buff.writeUInt8(2);
|
||||
buff.writeUInt8(constants_1.Socks5Auth.NoAuth);
|
||||
buff.writeUInt8(constants_1.Socks5Auth.UserPass);
|
||||
}
|
||||
else {
|
||||
buff.writeUInt8(1);
|
||||
buff.writeUInt8(constants_1.Socks5Auth.NoAuth);
|
||||
}
|
||||
this._nextRequiredPacketBufferSize =
|
||||
constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5InitialHandshakeResponse;
|
||||
this._socket.write(buff.toBuffer());
|
||||
this.state = 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] === 0xff) {
|
||||
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.sendSocks5CommandRequest();
|
||||
// If selected Socks v5 auth method is user/password, send auth handshake.
|
||||
}
|
||||
else if (data[1] === constants_1.Socks5Auth.UserPass) {
|
||||
this.sendSocks5UserPassAuthentication();
|
||||
}
|
||||
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.state = constants_1.SocksClientState.SentAuthentication;
|
||||
}
|
||||
/**
|
||||
* Handles Socks v5 auth handshake response.
|
||||
* @param data
|
||||
*/
|
||||
handleInitialSocks5AuthenticationHandshakeResponse() {
|
||||
this.state = constants_1.SocksClientState.ReceivedAuthenticationResponse;
|
||||
const data = this._receiveBuffer.get(2);
|
||||
if (data[1] !== 0x00) {
|
||||
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(ip.toBuffer(this._options.destination.host));
|
||||
}
|
||||
else if (net.isIPv6(this._options.destination.host)) {
|
||||
buff.writeUInt8(constants_1.Socks5HostType.IPv6);
|
||||
buff.writeBuffer(ip.toBuffer(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.state = 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: ip.fromLong(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) // Slice at 5 to skip host length
|
||||
);
|
||||
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.toString(buff.readBuffer(16)),
|
||||
port: buff.readUInt16BE()
|
||||
};
|
||||
}
|
||||
// We have everything we need
|
||||
this.state = 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.state = constants_1.SocksClientState.Established;
|
||||
this.removeInternalSocketHandlers();
|
||||
this.emit('established', { 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.state = constants_1.SocksClientState.BoundWaitingForConnection;
|
||||
this._nextRequiredPacketBufferSize =
|
||||
constants_1.SOCKS_INCOMING_PACKET_SIZES.Socks5ResponseHeader;
|
||||
this.emit('bound', { socket: this._socket, remoteHost });
|
||||
/*
|
||||
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.state = constants_1.SocksClientState.Established;
|
||||
this.removeInternalSocketHandlers();
|
||||
this.emit('established', { socket: this._socket, remoteHost });
|
||||
}
|
||||
}
|
||||
}
|
||||
/**
|
||||
* 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: ip.fromLong(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) // Slice at 5 to skip host length
|
||||
);
|
||||
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.toString(buff.readBuffer(16)),
|
||||
port: buff.readUInt16BE()
|
||||
};
|
||||
}
|
||||
this.state = constants_1.SocksClientState.Established;
|
||||
this.removeInternalSocketHandlers();
|
||||
this.emit('established', { socket: this._socket, remoteHost });
|
||||
}
|
||||
}
|
||||
get socksClientOptions() {
|
||||
return Object.assign({}, this._options);
|
||||
}
|
||||
}
|
||||
exports.SocksClient = SocksClient;
|
||||
//# sourceMappingURL=socksclient.js.map
|
||||
1
node_modules/socks/build/client/socksclient.js.map
generated
vendored
Normal file
1
node_modules/socks/build/client/socksclient.js.map
generated
vendored
Normal file
File diff suppressed because one or more lines are too long
Loading…
Add table
Add a link
Reference in a new issue