82 lines
2.1 KiB
JavaScript
82 lines
2.1 KiB
JavaScript
'use strict';
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var PromiseA = require('bluebird').Promise;
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var natpmp = require('nat-pmp');
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var exec = require('child_process').exec;
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exports.pmpForward = function (port) {
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return new PromiseA(function (resolve, reject) {
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exec('ip route show default', function (err, stdout, stderr) {
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var gw;
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if (err || stderr) { reject(err || stderr); return; }
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// default via 192.168.1.1 dev eth0
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gw = stdout.replace(/^default via (\d+\.\d+\.\d+\.\d+) dev[\s\S]+/m, '$1');
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console.log('Possible PMP gateway is', gw);
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// create a "client" instance connecting to your local gateway
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var client = natpmp.connect(gw);
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function setPortForward() {
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// setup a new port mapping
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client.portMapping({
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private: port.private || port.public
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, public: port.public || port.private
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, ttl: port.ttl || 0 // 600
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}, function (err, info) {
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if (err) {
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reject(err);
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return;
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}
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console.log(info);
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// {
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// type: 'tcp',
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// epoch: 8922109,
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// private: 22,
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// public: 2222,
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// ...
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// }
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resolve();
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});
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}
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// explicitly ask for the current external IP address
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setTimeout(function () {
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client.externalIp(function (err, info) {
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if (err) throw err;
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console.log('Current external IP address: %s', info.ip.join('.'));
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setPortForward();
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});
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});
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});
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});
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};
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function usage() {
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console.warn("");
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console.warn("node helpers/pmp-forward [public port] [private port] [ttl]");
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console.warn("");
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}
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function run() {
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var pubPort = parseInt(process.argv[2], 10) || 0;
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var privPort = parseInt(process.argv[3], 10) || pubPort;
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var ttl = parseInt(process.argv[4], 10) || 0;
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var options = { public: pubPort, private: privPort, ttl: ttl };
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if (!pubPort) {
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usage();
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return;
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}
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exports.pmpForward(options).then(function () {
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console.log('done');
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});
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}
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if (require.main === module) {
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run();
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}
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