108 lines
1.9 KiB
JavaScript
108 lines
1.9 KiB
JavaScript
/*!
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* external.js - external ip address discovery for bcoin
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* Copyright (c) 2017, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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'use strict';
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const request = require('../http/request');
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const IP = require('../utils/ip');
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/**
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* @exports net/external
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*/
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const external = exports;
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/**
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* Attempt to retrieve external IP from icanhazip.com.
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* @method
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* @returns {Promise}
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*/
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external.getIPv4 = async function getIPv4() {
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let res, ip;
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try {
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res = await request({
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method: 'GET',
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uri: 'http://ipv4.icanhazip.com',
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expect: 'txt',
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timeout: 2000
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});
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} catch (e) {
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return await external.getIPv42();
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}
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try {
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ip = res.body.trim();
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ip = IP.toBuffer(ip);
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if (!IP.isIPv4(ip))
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throw new Error('Could not find IPv4.');
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ip = IP.toString(ip);
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} catch (e) {
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return await external.getIPv42();
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}
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return ip;
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};
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/**
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* Attempt to retrieve external IP from dyndns.org.
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* @method
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* @ignore
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* @returns {Promise}
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*/
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external.getIPv42 = async function getIPv42() {
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let res, match, ip, raw;
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res = await request({
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method: 'GET',
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uri: 'http://checkip.dyndns.org',
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expect: 'html',
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timeout: 2000
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});
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match = /IP Address:\s*([0-9a-f.:]+)/i.exec(res.body);
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if (!match)
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throw new Error('Could not find IPv4.');
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ip = match[1];
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raw = IP.toBuffer(ip);
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if (!IP.isIPv4(raw))
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throw new Error('Could not find IPv4.');
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return IP.toString(raw);
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};
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/**
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* Attempt to retrieve external IP from icanhazip.com.
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* @method
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* @returns {Promise}
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*/
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external.getIPv6 = async function getIPv6() {
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let res, ip;
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res = await request({
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method: 'GET',
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uri: 'http://ipv6.icanhazip.com',
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expect: 'txt',
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timeout: 2000
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});
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ip = res.body.trim();
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ip = IP.toBuffer(ip);
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if (!IP.isIPv6(ip))
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throw new Error('Could not find IPv6.');
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return IP.toString(ip);
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};
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