473 lines
16 KiB
JavaScript
473 lines
16 KiB
JavaScript
'use strict';
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module.exports.create = function (deps, config) {
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console.log('config', config);
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//var PromiseA = global.Promise;
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var PromiseA = require('bluebird');
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var greenlock = require('greenlock');
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var listeners = require('./servers').listeners;
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var parseSni = require('sni');
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var modules = { };
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var program = {
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tlsOptions: require('localhost.daplie.me-certificates').merge({})
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// , acmeDirectoryUrl: 'https://acme-v01.api.letsencrypt.org/directory'
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, acmeDirectoryUrl: 'https://acme-staging.api.letsencrypt.org/directory'
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// , challengeType: 'tls-sni-01' // won't work with a tunnel
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, challengeType: 'http-01'
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};
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var secureContexts = {};
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var tunnelAdminTlsOpts = {};
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var tls = require('tls');
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var tcpRouter = {
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_map: { }
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, _create: function (address, port) {
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// port provides hinting for http, smtp, etc
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return function (conn, firstChunk, opts) {
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console.log('[tcpRouter] ' + address + ':' + port + ' ' + (opts.servername || ''));
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var m;
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var str;
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var hostname;
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var newHeads;
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// TODO test per-module
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// Maybe HTTP
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if (firstChunk[0] > 32 && firstChunk[0] < 127) {
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str = firstChunk.toString();
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m = str.match(/(?:^|[\r\n])Host: ([^\r\n]+)[\r\n]*/im);
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hostname = (m && m[1].toLowerCase() || '').split(':')[0];
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console.log('[tcpRouter] hostname', hostname);
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if (/HTTP\//i.test(str)) {
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//conn.__service = 'http';
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}
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}
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if (!hostname) {
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// TODO allow tcp tunneling
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// TODO we need some way of tagging tcp as either terminated tls or insecure
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conn.write(
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"HTTP/1.1 404 Not Found\r\n"
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+ "Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n"
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+ "Content-Type: text/html\r\n"
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+ "Content-Length: " + 9 + "\r\n"
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+ "\r\n"
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+ "Not Found"
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);
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conn.end();
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return;
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}
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// Poor-man's http proxy
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// XXX SECURITY XXX: should strip existing X-Forwarded headers
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newHeads =
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[ "X-Forwarded-Proto: " + (opts.encrypted ? 'https' : 'http')
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, "X-Forwarded-For: " + (opts.remoteAddress || conn.remoteAddress)
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, "X-Forwarded-Host: " + hostname
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];
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if (!opts.encrypted) {
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// a exists-only header that a bad client could not remove
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newHeads.push("X-Not-Encrypted: yes");
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}
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if (opts.servername) {
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newHeads.push("X-Forwarded-Sni: " + opts.servername);
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if (opts.servername !== hostname) {
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// an exists-only header that a bad client could not remove
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newHeads.push("X-Two-Servernames: yes");
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}
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}
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firstChunk = firstChunk.toString('utf8');
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// JSON.stringify("Host: example.com\r\nNext: Header".replace(/(Host: [^\r\n]*)/i, "$1" + "\r\n" + "X: XYZ"))
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firstChunk = firstChunk.replace(/(Host: [^\r\n]*)/i, "$1" + "\r\n" + newHeads.join("\r\n"));
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process.nextTick(function () {
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conn.unshift(Buffer.from(firstChunk, 'utf8'));
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});
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//
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// hard-coded routes for the admin interface
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if (
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/\blocalhost\.admin\./.test(hostname) || /\badmin\.localhost\./.test(hostname)
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|| /\blocalhost\.alpha\./.test(hostname) || /\balpha\.localhost\./.test(hostname)
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) {
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if (!modules.admin) {
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modules.admin = require('./modules/admin.js').create(deps, config);
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}
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modules.admin.emit('connection', conn);
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return;
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}
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// TODO static file handiling and such or whatever
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if (!modules.http) {
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modules.http = require('./modules/http.js').create(deps, config);
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}
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opts.hostname = hostname;
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conn.__opts = opts;
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modules.http.emit('connection', conn);
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};
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}
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, get: function getTcpRouter(address, port) {
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address = address || '0.0.0.0';
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var id = address + ':' + port;
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if (!tcpRouter._map[id]) {
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tcpRouter._map[id] = tcpRouter._create(address, port);
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}
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return tcpRouter._map[id];
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}
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};
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var tlsRouter = {
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_map: { }
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, _create: function (address, port/*, nextServer*/) {
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// port provides hinting for https, smtps, etc
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return function (socket, firstChunk, opts) {
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if (opts.hyperPeek) {
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// See "PEEK COMMENT" for more info
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// This was peeked at properly, so we don't have to re-wrap it
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// in order to get the connection to not hang.
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// The real first 'data' and 'readable' events will occur as they should
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program.tlsTunnelServer.emit('connection', socket);
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return;
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}
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var servername = opts.servername;
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var packerStream = require('tunnel-packer').Stream;
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var myDuplex = packerStream.create(socket);
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myDuplex.remoteAddress = opts.remoteAddress || myDuplex.remoteAddress;
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myDuplex.remotePort = opts.remotePort || myDuplex.remotePort;
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console.log('[tlsRouter] ' + address + ':' + port + ' servername', servername, myDuplex.remoteAddress);
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// needs to wind up in one of 3 states:
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// 1. SNI-based Proxy / Tunnel (we don't even need to put it through the tlsSocket)
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// 2. Admin Interface (skips the proxying)
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// 3. Terminated (goes on to a particular module or route)
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//myDuplex.__tlsTerminated = true;
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process.nextTick(function () {
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// this must happen after the socket is emitted to the next in the chain,
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// but before any more data comes in via the network
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socket.unshift(firstChunk);
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});
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// nextServer.emit could be used here
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program.tlsTunnelServer.emit('connection', myDuplex);
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// Why all this wacky-do with the myDuplex?
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// because https://github.com/nodejs/node/issues/8854, that's why
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// (because node's internal networking layer == 💩 sometimes)
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socket.on('data', function (chunk) {
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console.log('[' + Date.now() + '] tls socket data', chunk.byteLength);
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myDuplex.push(chunk);
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});
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socket.on('error', function (err) {
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console.error('[error] httpsTunnel (Admin) TODO close');
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console.error(err);
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myDuplex.emit('error', err);
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});
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socket.on('close', function () {
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myDuplex.end();
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});
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};
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}
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, get: function getTcpRouter(address, port) {
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address = address || '0.0.0.0';
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var id = address + ':' + port;
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if (!tlsRouter._map[id]) {
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tlsRouter._map[id] = tlsRouter._create(address, port);
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}
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return tlsRouter._map[id];
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}
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};
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// opts = { servername, encrypted, peek, data, remoteAddress, remotePort }
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function peek(conn, firstChunk, opts) {
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// TODO port/service-based routing can do here
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// TLS byte 1 is handshake and byte 6 is client hello
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if (0x16 === firstChunk[0]/* && 0x01 === firstChunk[5]*/) {
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console.log('tryTls');
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opts.servername = (parseSni(firstChunk)||'').toLowerCase() || 'localhost.invalid';
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tlsRouter.get(opts.localAddress || conn.localAddress, conn.localPort)(conn, firstChunk, opts);
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return;
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}
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console.log('tryTcp');
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if (opts.hyperPeek) {
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// even though we've already peeked, this logic is just as well to let be
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// since it works properly either way, unlike the tls socket
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conn.once('data', function (chunk) {
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console.log('hyperPeek re-peek data', chunk.toString('utf8'));
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tcpRouter.get(opts.localAddress || conn.localAddress, conn.localPort)(conn, chunk, opts);
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});
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return;
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}
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tcpRouter.get(opts.localAddress || conn.localAddress, conn.localPort)(conn, firstChunk, opts);
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}
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function netHandler(conn, opts) {
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opts = opts || {};
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console.log('[netHandler]', conn.localAddres, conn.localPort, opts.encrypted);
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// XXX PEEK COMMENT XXX
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// TODO we can have our cake and eat it too
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// we can skip the need to wrap the TLS connection twice
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// because we've already peeked at the data,
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// but this needs to be handled better before we enable that
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// (because it creates new edge cases)
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if (opts.hyperPeek) {
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console.log('hyperpeek');
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peek(conn, opts.firstChunk, opts);
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return;
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}
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conn.once('data', function (chunk) {
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peek(conn, chunk, opts);
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});
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}
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function dnsListener(msg) {
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var dgram = require('dgram');
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var socket = dgram.createSocket('udp4');
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socket.send(msg, config.dns.proxy.port, config.dns.proxy.address || '127.0.0.1');
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}
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function approveDomains(opts, certs, cb) {
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// This is where you check your database and associated
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// email addresses with domains and agreements and such
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// The domains being approved for the first time are listed in opts.domains
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// Certs being renewed are listed in certs.altnames
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function complete(err, stuff) {
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opts.email = stuff.email;
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opts.agreeTos = stuff.agreeTos;
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opts.server = stuff.server;
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opts.challengeType = stuff.challengeType;
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cb(null, { options: opts, certs: certs });
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}
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if (certs) {
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// TODO make sure the same options are used for renewal as for registration?
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opts.domains = certs.altnames;
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cb(null, { options: opts, certs: certs });
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return;
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}
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// check config for domain name
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if (-1 !== config.tls.servernames.indexOf(opts.domain)) {
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// TODO how to handle SANs?
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// TODO fetch domain-specific email
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// TODO fetch domain-specific acmeDirectory
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// NOTE: you can also change other options such as `challengeType` and `challenge`
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// opts.challengeType = 'http-01';
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// opts.challenge = require('le-challenge-fs').create({}); // TODO this doesn't actually work yet
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complete(null, {
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email: config.tls.email, agreeTos: true, server: program.acmeDirectoryUrl, challengeType: program.challengeType });
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return;
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}
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// TODO ask http module about the default path (/srv/www/:hostname)
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// (if it exists, we can allow and add to config)
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if (!modules.http) {
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modules.http = require('./modules/http.js').create(deps, config);
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}
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modules.http.checkServername(opts.domain).then(function (stuff) {
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if (!stuff || !stuff.domains) {
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// TODO once precheck is implemented we can just let it pass if it passes, yknow?
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cb(new Error('domain is not allowed'));
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return;
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}
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complete(null, {
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domain: stuff.domain || stuff.domains[0]
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, domains: stuff.domains
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, email: stuff.email || program.email
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, server: stuff.acmeDirectoryUrl || program.acmeDirectoryUrl
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, challengeType: stuff.challengeType || program.challengeType
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, challenge: stuff.challenge
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});
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return;
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}, cb);
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}
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function getAcme() {
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return greenlock.create({
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//server: 'staging'
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server: 'https://acme-v01.api.letsencrypt.org/directory'
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, challenges: {
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// TODO dns-01
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'http-01': require('le-challenge-fs').create({ webrootPath: '/tmp/acme-challenges', debug: config.debug })
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, 'tls-sni-01': require('le-challenge-sni').create({ debug: config.debug })
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//, 'dns-01': require('le-challenge-ddns').create()
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}
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, store: require('le-store-certbot').create({ webrootPath: '/tmp/acme-challenges' })
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//, email: program.email
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//, agreeTos: program.agreeTos
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, approveDomains: approveDomains
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//, approvedDomains: program.servernames
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});
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}
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deps.tunnel = deps.tunnel || {};
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deps.tunnel.net = {
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createConnection: function (opts, cb) {
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console.log('[gl.tunnel] creating connection');
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// here "reader" means the socket that looks like the connection being accepted
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// here "writer" means the remote-looking part of the socket that driving the connection
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var writer;
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var wrapOpts = {};
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var rawTls = opts.tls || (0x16 === opts.data[0]) && (0x01 === opts.data[5]);
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function usePair(err, reader) {
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if (err) {
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process.nextTick(function () {
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writer.emit('error', err);
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});
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return;
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}
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// this has the normal net/tcp stuff plus our custom stuff
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// opts = { address, port,
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// hostname, servername, tls, encrypted, data, localAddress, localPort, remoteAddress, remotePort, remoteFamily }
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Object.keys(opts).forEach(function (key) {
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wrapOpts[key] = opts[key];
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try {
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reader[key] = opts[key];
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} catch(e) {
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// can't set real socket getters, like remoteAddr
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}
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});
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// A few more extra specialty options
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wrapOpts.localAddress = wrapOpts.localAddress || '127.0.0.2'; // TODO use the tunnel's external address
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wrapOpts.localPort = wrapOpts.localPort || 'tunnel-0';
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try {
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reader._remoteAddress = wrapOpts.remoteAddress;
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reader._remotePort = wrapOpts.remotePort;
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reader._remoteFamily = wrapOpts.remoteFamily;
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reader._localAddress = wrapOpts.localAddress;
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reader._localPort = wrapOpts.localPort;
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reader._localFamily = wrapOpts.localFamily;
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} catch(e) {
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}
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netHandler(reader, wrapOpts);
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process.nextTick(function () {
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//opts.data = wrapOpts.data;
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// this cb will cause the stream to emit its (actually) first data event
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// (even though it already gave a peek into that first data chunk)
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console.log('[tunnel] callback, data should begin to flow');
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cb();
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});
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}
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wrapOpts.firstChunk = opts.data;
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wrapOpts.hyperPeek = !!opts.data;
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// encrypted meaning is *terminated* TLS
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// tls meaning is *raw* TLS
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if (rawTls) {
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// TLS sockets must actually use a socket with a file descriptor
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// https://nodejs.org/api/net.html#net_class_net_socket
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writer = require('socket-pair').create(function (err, other) {
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usePair(err, other);
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});
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}
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else {
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// stream-pair can only be used by TCP sockets, not tls
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writer = require('stream-pair').create();
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usePair(null, writer.other);
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}
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return writer;
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}
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};
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Object.keys(program.tlsOptions).forEach(function (key) {
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tunnelAdminTlsOpts[key] = program.tlsOptions[key];
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});
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tunnelAdminTlsOpts.SNICallback = function (sni, cb) {
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console.log("[tlsOptions.SNICallback] SNI: '" + sni + "'");
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var tlsOptions;
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// Static Certs
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if (/.*localhost.*\.daplie\.me/.test(sni.toLowerCase())) {
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// TODO implement
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if (!secureContexts[sni]) {
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tlsOptions = require('localhost.daplie.me-certificates').mergeTlsOptions(sni, {});
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}
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if (tlsOptions) {
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secureContexts[sni] = tls.createSecureContext(tlsOptions);
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}
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if (secureContexts[sni]) {
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console.log('Got static secure context:', sni, secureContexts[sni]);
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cb(null, secureContexts[sni]);
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return;
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}
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}
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if (!program.greenlock) {
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program.greenlock = getAcme();
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}
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(program.greenlock.tlsOptions||program.greenlock.httpsOptions).SNICallback(sni, cb);
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};
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program.tlsTunnelServer = tls.createServer(tunnelAdminTlsOpts, function (tlsSocket) {
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console.log('(pre-terminated) tls connection, addr:', tlsSocket.remoteAddress);
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// things get a little messed up here
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//tlsSocket.on('data', function (chunk) {
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// console.log('terminated data:', chunk.toString());
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//});
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//(program.httpTunnelServer || program.httpServer).emit('connection', tlsSocket);
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//tcpRouter.get(conn.localAddress, conn.localPort)(conn, firstChunk, { encrypted: false });
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netHandler(tlsSocket, {
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servername: tlsSocket.servername
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, encrypted: true
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// remoteAddress... ugh... https://github.com/nodejs/node/issues/8854
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, remoteAddress: tlsSocket.remoteAddress || tlsSocket._remoteAddress || tlsSocket._handle._parent.owner.stream.remoteAddress
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, remotePort: tlsSocket.remotePort || tlsSocket._remotePort || tlsSocket._handle._parent.owner.stream.remotePort
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, remoteFamily: tlsSocket.remoteFamily || tlsSocket._remoteFamily || tlsSocket._handle._parent.owner.stream.remoteFamily
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});
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});
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var listenPromises = config.tcp.ports.map(function (port) {
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return listeners.tcp.add(port, netHandler);
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});
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if (config.dns.bind) {
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if (Array.isArray(config.dns.bind)) {
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listenPromises = listenPromises.concat(config.dns.bind.map(function (port) {
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return listeners.udp.add(port, dnsListener);
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}));
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} else {
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listenPromises.push(listeners.udp.add(config.dns.bind, dnsListener));
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}
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}
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return PromiseA.all(listenPromises);
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};
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