From 80861c11268016c5de05e1a891800fbd2519676e Mon Sep 17 00:00:00 2001 From: heri16 <527101+heri16@users.noreply.github.com> Date: Tue, 4 Aug 2020 22:02:56 +0800 Subject: [PATCH] add libzt.createConnection() --- examples/node/binding.cc | 12 + examples/node/libzt.js | 371 ++++++++++++++- examples/node/package-lock.json | 788 ++++++++++++++++++++++++++++++++ examples/node/package.json | 1 + examples/node/test.js | 24 + 5 files changed, 1171 insertions(+), 25 deletions(-) create mode 100644 examples/node/package-lock.json create mode 100644 examples/node/test.js diff --git a/examples/node/binding.cc b/examples/node/binding.cc index cf0d2f9..1cf58b9 100644 --- a/examples/node/binding.cc +++ b/examples/node/binding.cc @@ -415,6 +415,17 @@ public: return zts_write(fd, buf.data(), buf.length()); } + static ssize_t writev(int fd, std::vector bufs) + { + std::size_t size = bufs.size(); + zts_iovec iov[size]; + for (std::size_t i = 0; i != size; ++i) { + iov[i].iov_base = bufs[i].data(); + iov[i].iov_len = bufs[i].length(); + } + return zts_writev(fd, iov, bufs.size()); + } + static ssize_t recv(int fd, nbind::Buffer buf, int flags) { return zts_recv(fd, buf.data(), buf.length(), flags); @@ -466,6 +477,7 @@ NBIND_CLASS(ZeroTier) { method(connect); method(read); method(write); + method(writev); method(recv); method(send); method(fcntlSetBlocking); diff --git a/examples/node/libzt.js b/examples/node/libzt.js index 62e7814..4e9744b 100644 --- a/examples/node/libzt.js +++ b/examples/node/libzt.js @@ -1,41 +1,362 @@ -var nbind = require('@mcesystems/nbind') -var ZeroTier = nbind.init().lib.ZeroTier +'use strict'; -// Start ZeroTier service -ZeroTier.start(".zerotier", 9994); +const net = require('net'); +const nbind = require('@mcesystems/nbind') +const ZeroTier = nbind.init().lib.ZeroTier -// Join virtual network -ZeroTier.join("8056c2e21c000001"); -// Open the socket -let fd = ZeroTier.connectStream("29.49.7.203", 4444); +/* + * EXAMPLE USAGE + * Usage: `nc -lv 4444` + */ -// Send some data -ZeroTier.send(fd, Buffer.from("Name?\n", 'utf8'), 0) +function example() { + // Start ZeroTier service + ZeroTier.start(".zerotier", 9994); -// Set blocking read mode -// ZeroTier.fcntlSetBlocking(fd, true); -let heartbeat = setInterval(() => process.stderr.write('.'), 100) + // Join virtual network + ZeroTier.join("8056c2e21c000001"); -// Receive some data -const _read = () => { + // Open the socket + let fd = ZeroTier.connectStream("29.49.7.203", 4444); + + // Send some data + ZeroTier.send(fd, Buffer.from("Name?\n", 'utf8'), 0) + + // Set blocking read mode + // ZeroTier.fcntlSetBlocking(fd, true); + let heartbeat = setInterval(() => process.stderr.write('.'), 100) + + // Receive some data + const _read = () => { const buf = Buffer.alloc(32) let bytes = -1 do { - bytes = ZeroTier.recv(fd, buf, 0) - if (bytes > 0) { process.stdout.write(buf.toString('utf8')) } + bytes = ZeroTier.recv(fd, buf, 0) + if (bytes > 0) { process.stdout.write(buf.toString('utf8')) } } while (bytes > 0); if (!ZeroTier.getMyNode().online || buf.toString('utf8').includes("exit")) { - // Close the socket - ZeroTier.close(fd) - // Stop ZeroTier service - ZeroTier.stop() - // Clear the interval - clearInterval(heartbeat) + // Close the socket + ZeroTier.close(fd) + // Stop ZeroTier service + ZeroTier.stop() + // Clear the interval + clearInterval(heartbeat) } else { - setTimeout(_read, 500) + setTimeout(_read, 500) } + } + _read() } -_read() + +// Target API: +// +// let s = net.connect({port: 80, host: 'google.com'}, function() { +// ... +// }); +// +// There are various forms: +// +// connect(options, [cb]) +// connect(port, [host], [cb]) +// connect(path, [cb]); +// +function connect(...args) { + const normalized = net._normalizeArgs(args); + const options = normalized[0]; + // debug('createConnection', normalized); + const socket = new Socket(options); + + if (options.timeout) { + socket.setTimeout(options.timeout); + } + + return socket.connect(normalized); +} + +/* + * https://github.com/nodejs/node/blob/v12.18.3/lib/net.js#L1107 + */ +function afterConnect(status, self, req, readable, writable) { + // const self = handle[owner_symbol]; + + // Callback may come after call to destroy + if (self.destroyed) { + return; + } + + // debug('afterConnect'); + + // assert(self.connecting); + self.connecting = false; + self._sockname = null; + + if (status === 0) { + self.readable = readable; + if (!self._writableState.ended) + self.writable = writable; + self._unrefTimer(); + + self.emit('connect'); + self.emit('ready'); + + // Start the first read, or get an immediate EOF. + // this doesn't actually consume any bytes, because len=0. + if (readable && !self.isPaused()) + self.read(0); + + } else { + self.connecting = false; + let details; + if (req.localAddress && req.localPort) { + details = req.localAddress + ':' + req.localPort; + } + const ex = new Error(status, + 'connect', + req.address, + req.port, + details); + if (details) { + ex.localAddress = req.localAddress; + ex.localPort = req.localPort; + } + self.destroy(ex); + } +} + +function writeGeneric(self, chunk, encoding, callback) { + const buf = (!self.decodeStrings && !Buffer.isBuffer(chunk)) ? Buffer.from(chunk, encoding) : chunk + + let bytes + const err = ZeroTier.send(self._fd, buf, 0) + switch (err) { + case -1: + callback(new Error("ZeroTier Socket error")) + break + case -2: + callback(new Error("ZeroTier Service error")) + break + case -3: + callback(new Error("ZeroTier Invalid argument")) + break + default: + bytes = err + callback(null) + } + + return { + async: true, + bytes: bytes, + } +} + +function writevGeneric(self, chunks, callback) { + const bufs = chunks.map(({ chunk, encoding }) => (!self.decodeStrings && !Buffer.isBuffer(chunk)) ? Buffer.from(chunk, encoding) : chunk) + + let bytes + const err = ZeroTier.writev(self._fd, bufs) + switch (err) { + case -1: + callback(new Error("ZeroTier Socket error")) + break + case -2: + callback(new Error("ZeroTier Service error")) + break + case -3: + callback(new Error("ZeroTier Invalid argument")) + break + default: + bytes = err + callback(null) + } + + return { + async: true, + bytes: bytes, + } +} + +class Socket extends net.Socket { + /* + * https://github.com/nodejs/node/blob/v12.18.3/lib/net.js#L929 + */ + connect(...args) { + let normalized; + // If passed an array, it's treated as an array of arguments that have + // already been normalized (so we don't normalize more than once). This has + // been solved before in https://github.com/nodejs/node/pull/12342, but was + // reverted as it had unintended side effects. + if (Array.isArray(args[0])) { + normalized = args[0]; + } else { + normalized = net._normalizeArgs(args); + } + const options = normalized[0]; + const cb = normalized[1]; + + // if (this.write !== net.Socket.prototype.write) + // this.write = net.Socket.prototype.write; + + if (this.destroyed) { + this._handle = null; + this._peername = null; + this._sockname = null; + } + + // const { path } = options; + // const pipe = !!path; + // debug('pipe', pipe, path); + + // if (!this._handle) { + // this._handle = pipe ? + // new Pipe(PipeConstants.SOCKET) : + // new TCP(TCPConstants.SOCKET); + // initSocketHandle(this); + // } + + if (cb !== null) { + this.once('connect', cb); + } + + this._unrefTimer(); + + this.connecting = true; + this.writable = true; + + // if (pipe) { + // validateString(path, 'options.path'); + // defaultTriggerAsyncIdScope( + // this[async_id_symbol], internalConnect, this, path + // ); + // } else { + // lookupAndConnect(this, options); + // } + + const { host, port } = options; + // If host is an IP, skip performing a lookup + const addressType = net.isIP(host); + if (addressType) { + this._fd = ZeroTier.connectStream(host, port); + afterConnect(0, this, {}, true, true); + } else { + throw new Error("DNS LOOKUP NOT IMPLEMENTED"); + } + + return this; + } + + /* + * https://nodejs.org/docs/latest-v12.x/api/stream.html#stream_readable_read_size_1 + */ + _read(size) { + // debug('_read'); + + if (this.connecting) { + // debug('_read wait for connection'); + this.once('connect', () => this._read(size)); + return + } + + if (!this.readChunk || this.readChunk.length < size) { + this.readChunk = Buffer.alloc(size) + } + + let bytes = -1 + let moreData = true + do { + bytes = ZeroTier.recv(this._fd, this.readChunk, 0) + switch (bytes) { + case -2: + throw new Error("ZeroTier Service error") + case -3: + throw new Error("ZeroTier Invalid argument") + default: + if (bytes > 0) { + // this.bytesRead += bytes + moreData = this.push(this.readChunk) + } + } + } while (bytes > 0 && moreData) + + if (moreData) { setTimeout(() => this._read(size), 500) } + } + + /* + * https://nodejs.org/docs/latest-v12.x/api/stream.html#stream_writable_writev_chunks_callback + */ + _writev(chunks, cb) { + this._writeGeneric(true, chunks, '', cb); + } + + /* + * https://nodejs.org/docs/latest-v12.x/api/stream.html#stream_writable_write_chunk_encoding_callback_1 + */ + _write(data, encoding, cb) { + this._writeGeneric(false, data, encoding, cb); + } + + /* + * https://nodejs.org/docs/latest-v12.x/api/stream.html#stream_writable_final_callback + */ + _final(callback) { + const err = ZeroTier.close(this._fd) + + switch (err) { + case -1: + return callback(new Error("ZeroTier Socket error")) + break + case -2: + return callback(new Error("ZeroTier Service error")) + break + default: + return super._final(callback) + } + } + + /* + * https://github.com/nodejs/node/blob/v12.18.3/lib/net.js#L760 + */ + _writeGeneric(writev, data, encoding, cb) { + // If we are still connecting, then buffer this for later. + // The Writable logic will buffer up any more writes while + // waiting for this one to be done. + if (this.connecting) { + this._pendingData = data; + this._pendingEncoding = encoding; + this.once('connect', function connect() { + this._writeGeneric(writev, data, encoding, cb); + }); + return; + } + this._pendingData = null; + this._pendingEncoding = ''; + + // if (!this._handle) { + // cb(new ERR_SOCKET_CLOSED()); + // return false; + // } + + this._unrefTimer(); + + let req; + if (writev) + req = writevGeneric(this, data, cb); + else + req = writeGeneric(this, data, encoding, cb); + if (req.async) { + // this[kLastWriteQueueSize] = req.bytes; + } + } +} + +module.exports = { + example, + start: ZeroTier.start, + join: ZeroTier.join, + connect, + createConnection: connect, + Socket, + Stream: Socket, // Legacy naming +}; diff --git a/examples/node/package-lock.json b/examples/node/package-lock.json new file mode 100644 index 0000000..4a2e074 --- /dev/null +++ b/examples/node/package-lock.json @@ -0,0 +1,788 @@ +{ + "name": "libzt", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "@mcesystems/nbind": { + "version": "0.3.18", + "resolved": "https://registry.npmjs.org/@mcesystems/nbind/-/nbind-0.3.18.tgz", + "integrity": "sha512-gZFv881rT/nTNNl92K97DqbFVECiniEHg4ABle7WFKklQSCge7ILY58otnKvCgoqrrS/9Mv//mTf+2k3MPSGXA==", + "requires": { + "emscripten-library-decorator": "~0.2.2", + "mkdirp": "~0.5.1", + "nan": "^2.9.2" + } + }, + "abbrev": { + "version": "1.1.1", + "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz", + "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==" + }, + "ajv": { + "version": "6.12.3", + "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.3.tgz", + 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a/examples/node/package.json +++ b/examples/node/package.json @@ -5,6 +5,7 @@ "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", + "start": "node test.js", "preinstall": "mkdir -p libzt; cd libzt; ln -sf ../../../include; ln -sf ../../../lib", "autogypi": "autogypi", "node-gyp": "node-gyp", diff --git a/examples/node/test.js b/examples/node/test.js new file mode 100644 index 0000000..2aeb3cb --- /dev/null +++ b/examples/node/test.js @@ -0,0 +1,24 @@ +'use strict' + +const libzt = require('./libzt') + +// libzt.example() + +libzt.start(".zerotier", 9994) + +libzt.join("8056c2e21c000001") + +// Usage: `nc -lv 4444` +let client = libzt.createConnection({ port: 4444, host: '29.49.7.203' }, () => { + // 'connect' listener. + console.log('connected to server!'); + // client.write('world!\r\n'); +}); +client.write("Name?\n", 'utf8'); +client.on('data', (data) => { + console.log(data.toString()); + client.end(); +}); +client.on('end', () => { + console.log('disconnected from server'); +});