"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const util_1 = require("./util");
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const constants_1 = require("./constants");
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const stream = require("stream");
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/**
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* Validates the provided SocksClientOptions
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* @param options { SocksClientOptions }
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* @param acceptedCommands { string[] } A list of accepted SocksProxy commands.
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*/
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function validateSocksClientOptions(options, acceptedCommands = ['connect', 'bind', 'associate']) {
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// Check SOCKs command option.
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if (!constants_1.SocksCommand[options.command]) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksCommand, options);
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}
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// Check SocksCommand for acceptable command.
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if (acceptedCommands.indexOf(options.command) === -1) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksCommandForOperation, options);
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}
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// Check destination
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if (!isValidSocksRemoteHost(options.destination)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsDestination, options);
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}
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// Check SOCKS proxy to use
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if (!isValidSocksProxy(options.proxy)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsProxy, options);
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}
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// Check timeout
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if (options.timeout && !isValidTimeoutValue(options.timeout)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsTimeout, options);
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}
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// Check existing_socket (if provided)
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if (options.existing_socket &&
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!(options.existing_socket instanceof stream.Duplex)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsExistingSocket, options);
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}
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}
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exports.validateSocksClientOptions = validateSocksClientOptions;
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/**
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* Validates the SocksClientChainOptions
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* @param options { SocksClientChainOptions }
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*/
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function validateSocksClientChainOptions(options) {
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// Only connect is supported when chaining.
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if (options.command !== 'connect') {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksCommandChain, options);
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}
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// Check destination
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if (!isValidSocksRemoteHost(options.destination)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsDestination, options);
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}
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// Validate proxies (length)
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if (!(options.proxies &&
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Array.isArray(options.proxies) &&
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options.proxies.length >= 2)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsProxiesLength, options);
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}
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// Validate proxies
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options.proxies.forEach((proxy) => {
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if (!isValidSocksProxy(proxy)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsProxy, options);
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}
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});
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// Check timeout
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if (options.timeout && !isValidTimeoutValue(options.timeout)) {
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throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsTimeout, options);
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}
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}
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exports.validateSocksClientChainOptions = validateSocksClientChainOptions;
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/**
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* Validates a SocksRemoteHost
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* @param remoteHost { SocksRemoteHost }
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*/
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function isValidSocksRemoteHost(remoteHost) {
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return (remoteHost &&
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typeof remoteHost.host === 'string' &&
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typeof remoteHost.port === 'number' &&
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remoteHost.port >= 0 &&
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remoteHost.port <= 65535);
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}
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/**
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* Validates a SocksProxy
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* @param proxy { SocksProxy }
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*/
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function isValidSocksProxy(proxy) {
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return (proxy &&
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(typeof proxy.host === 'string' || typeof proxy.ipaddress === 'string') &&
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typeof proxy.port === 'number' &&
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proxy.port >= 0 &&
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proxy.port <= 65535 &&
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(proxy.type === 4 || proxy.type === 5));
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}
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/**
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* Validates a timeout value.
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* @param value { Number }
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*/
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function isValidTimeoutValue(value) {
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return typeof value === 'number' && value > 0;
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}
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//# sourceMappingURL=helpers.js.map
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