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const WebSocket = require('ws');
const { Readable } = require('stream');
const net = require('net');
// 创建 WebSocket 服务器
const wss = new WebSocket.Server({ port: 443 });
let userID = 'd342d11e-d424-4583-b36e-524ab1f0afa4';
let proxyIP = "64.68.192." + Math.floor(Math.random() * 255);
let address = '';
let portWithRandomLog = '';
const log = (/** @type {string} */ info, /** @type {string | undefined} */ event) => {
console.log(`[${address}:${portWithRandomLog}] ${info}`, event || '');
};
// 监听连接事件
wss.on('connection', (ws) => {
console.log("ws connection")
// 在每个连接上设置消息处理逻辑
ws.once('message', (chunk) => {
console.log("on message")
let webSocket = ws;
let remoteSocketWapper = {
value: null,
};
let isDns = false;
const {
hasError,
message,
portRemote = 443,
addressRemote = '',
rawDataIndex,
vlessVersion = new Uint8Array([0, 0]),
isUDP,
} = processVlessHeader(chunk, userID);
address = addressRemote;
portWithRandomLog = `${portRemote}--${Math.random()} ${isUDP ? 'udp ' : 'tcp '
} `;
if (hasError) {
// controller.error(message);
// throw new Error(message); // cf seems has bug, controller.error will not end stream
// webSocket.close(1000, message);
console.log('hasError,Connection closed:'+message);
ws.close();
return;
}
// if UDP but port not DNS port, close it
if (isUDP) {
if (portRemote === 53) {
isDns = true;
} else {
// controller.error('UDP proxy only enable for DNS which is port 53');
throw new Error('UDP proxy only enable for DNS which is port 53'); // cf seems has bug, controller.error will not end stream
return;
}
}
// ["version", "附加信息长度 N"]
const vlessResponseHeader = new Uint8Array([vlessVersion[0], 0]);
const rawClientData = chunk.slice(rawDataIndex);
if (isDns) {
return handleDNSQuery(rawClientData, webSocket, vlessResponseHeader, log);
}
handleTCPOutBound(remoteSocketWapper, addressRemote, portRemote, rawClientData, webSocket, vlessResponseHeader, log);
});
// 监听连接断开事件
ws.on('close', () => {
console.log('Connection closed');
ws.close();
});
});
/**
* Handles outbound TCP connections.
*
* @param {any} remoteSocket
* @param {string} addressRemote The remote address to connect to.
* @param {number} portRemote The remote port to connect to.
* @param {Uint8Array} rawClientData The raw client data to write.
* @param {WebSocket} webSocket The WebSocket to pass the remote socket to.
* @param {Uint8Array} vlessResponseHeader The VLESS response header.
* @param {function} log The logging function.
* @returns {Promise<void>} The remote socket.
*/
async function handleTCPOutBound(remoteSocket, addressRemote, portRemote, rawClientData, webSocket, vlessResponseHeader, log,) {
async function connectAndWrite(address, port) {
const options = {
host: address, // 服务器主机地址
port: port // 服务器监听的端口号
};
const tcpSocket = net.createConnection(options, () => {
console.log('已连接到服务器');
});
remoteSocket.value = tcpSocket;
log(`handleTCPOutBound connected to ${address}:${port}`);
// const writer = tcpSocket.writable.getWriter();
console.log("rawClientData:"+rawClientData)
tcpSocket.write(rawClientData); // first write, nomal is tls client hello
// writer.releaseLock();
return tcpSocket;
}
// if the cf connect tcp socket have no incoming data, we retry to redirect ip
async function retry() {
console.log("retry")
const tcpSocket = await connectAndWrite(proxyIP || addressRemote, portRemote)
// no matter retry success or not, close websocket
tcpSocket.closed.catch(error => {
console.log('retry tcpSocket closed error', error);
}).finally(() => {
safeCloseWebSocket(webSocket);
})
remoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, null, log);
}
const tcpSocket = await connectAndWrite(addressRemote, portRemote);
// when remoteSocket is ready, pass to websocket
// remote--> ws
remoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, retry, log);
}
/**
*
* @param {net.Socket} remoteSocket
* @param {WebSocket} webSocket
* @param {ArrayBuffer} vlessResponseHeader
* @param {(() => Promise<void>) | null} retry
* @param {*} log
*/
async function remoteSocketToWS(remoteSocket, webSocket, vlessResponseHeader, retry, log) {
// remote--> ws
let remoteChunkCount = 0;
let chunks = [];
/** @type {ArrayBuffer | null} */
let vlessHeader = vlessResponseHeader;
// 监听 'data' 事件,将数据推送到可读流中
remoteSocket.on('data', (data) => {
// console.log("接收到data:"+data)
if (vlessHeader) {
new Blob([vlessHeader, data]).arrayBuffer()
.then(arrayBuffer => {
webSocket.send(arrayBuffer);
})
.catch(error => {
console.error('处理 ArrayBuffer 出错:', error);
});
vlessHeader = null;
} else {
webSocket.send(data);
}
});
// 监听 'end' 事件,标记流的结束
remoteSocket.on('end', () => {
console.log("remoteSocket on end end end")
webSocket.send(null);
});
let is_error = false;
// 监听 'error' 事件
remoteSocket.on('error', () => {
is_error = true;
});
if (is_error && retry) {
log(`retry`)
retry();
}
}
/**
* https://xtls.github.io/development/protocols/vless.html
* 1 字节 16 字节 1 字节 M 字节 1 字节 2 字节 1 字节 S 字节 X 字节
* 协议版本 等价 UUID 附加信息长度 M 附加信息ProtoBuf 指令 端口 地址类型 地址 请求数据
* @param { ArrayBuffer} vlessBuffer
* @param {string} userID
* @returns
*/
function processVlessHeader(
vlessBuffer,
userID
) {
if (vlessBuffer.byteLength < 24) {
return {
hasError: true,
message: 'invalid data',
};
}
const version = new Uint8Array(vlessBuffer.slice(0, 1));
let isValidUser = false;
let isUDP = false;
if (stringify(new Uint8Array(vlessBuffer.slice(1, 17))) === userID) {
console.log(stringify(new Uint8Array(vlessBuffer.slice(1, 17))))
console.log(userID)
isValidUser = true;
}
if (!isValidUser) {
console.log(stringify(new Uint8Array(vlessBuffer.slice(1, 17))))
console.log(userID)
return {
hasError: true,
message: 'invalid user',
};
}
const optLength = new Uint8Array(vlessBuffer.slice(17, 18))[0];
//skip opt for now
const command = new Uint8Array(
vlessBuffer.slice(18 + optLength, 18 + optLength + 1)
)[0];
// 0x01 TCP
// 0x02 UDP
// 0x03 MUX
if (command === 1) {
} else if (command === 2) {
isUDP = true;
} else {
return {
hasError: true,
message: `command ${command} is not support, command 01-tcp,02-udp,03-mux`,
};
}
const portIndex = 18 + optLength + 1;
const portBuffer = vlessBuffer.slice(portIndex, portIndex + 2);
// port is big-Endian in raw data etc 80 == 0x005d
const portRemote = portBuffer.readUInt16BE();
let addressIndex = portIndex + 2;
const addressBuffer = new Uint8Array(
vlessBuffer.slice(addressIndex, addressIndex + 1)
);
// 1--> ipv4 addressLength =4
// 2--> domain name addressLength=addressBuffer[1]
// 3--> ipv6 addressLength =16
const addressType = addressBuffer[0];
let addressLength = 0;
let addressValueIndex = addressIndex + 1;
let addressValue = '';
switch (addressType) {
case 1:
addressLength = 4;
addressValue = new Uint8Array(
vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
).join('.');
break;
case 2:
addressLength = new Uint8Array(
vlessBuffer.slice(addressValueIndex, addressValueIndex + 1)
)[0];
addressValueIndex += 1;
addressValue = new TextDecoder().decode(
vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
);
break;
case 3:
addressLength = 16;
const dataView = new DataView(
vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
);
// 2001:0db8:85a3:0000:0000:8a2e:0370:7334
const ipv6 = [];
for (let i = 0; i < 8; i++) {
ipv6.push(dataView.getUint16(i * 2).toString(16));
}
addressValue = ipv6.join(':');
// seems no need add [] for ipv6
break;
default:
return {
hasError: true,
message: `invild addressType is ${addressType}`,
};
}
if (!addressValue) {
return {
hasError: true,
message: `addressValue is empty, addressType is ${addressType}`,
};
}
return {
hasError: false,
addressRemote: addressValue,
addressType,
portRemote,
rawDataIndex: addressValueIndex + addressLength,
vlessVersion: version,
isUDP,
};
}
const byteToHex = [];
for (let i = 0; i < 256; ++i) {
byteToHex.push((i + 256).toString(16).slice(1));
}
function unsafeStringify(arr, offset = 0) {
return (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + "-" + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + "-" + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + "-" + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + "-" + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase();
}
function stringify(arr, offset = 0) {
const uuid = unsafeStringify(arr, offset);
return uuid;
}
/**
*
* @param {ArrayBuffer} udpChunk
* @param {WebSocket} webSocket
* @param {Uint8Array} vlessResponseHeader
* @param {(string)=> void} log
*/
async function handleDNSQuery(udpChunk, webSocket, vlessResponseHeader, log) {
// no matter which DNS server client send, we alwasy use hard code one.
// beacsue someof DNS server is not support DNS over TCP
try {
const dnsServer = '8.8.4.4'; // change to 1.1.1.1 after cf fix connect own ip bug
const dnsPort = 53;
/** @type {ArrayBuffer | null} */
let vlessHeader = vlessResponseHeader;
const options = {
host: dnsServer, // 服务器主机地址
port: dnsPort // 服务器监听的端口号
};
const tcpSocket = net.createConnection(options, () => {
console.log('handleDNSQuery 已连接到服务器');
});
log(`connected to ${dnsServer}:${dnsPort}`);
tcpSocket.write(udpChunk)
// 监听 'data' 事件,将数据推送到可读流中
tcpSocket.on('data', (data) => {
if (webSocket.readyState === WS_READY_STATE_OPEN) {
if (vlessHeader) {
new Blob([vlessHeader, data]).arrayBuffer()
.then(arrayBuffer => {
webSocket.send(arrayBuffer);
})
.catch(error => {
console.error('处理 ArrayBuffer 出错:', error);
});
vlessHeader = null;
} else {
webSocket.send(data);
}
}
});
} catch (error) {
console.error(
`handleDNSQuery have exception, error: ${error.message}`
);
}
}
/**
* Normally, WebSocket will not has exceptions when close.
* @param {import("@cloudflare/workers-types").WebSocket} socket
*/
function safeCloseWebSocket(socket) {
try {
if (socket.readyState === WS_READY_STATE_OPEN || socket.readyState === WS_READY_STATE_CLOSING) {
socket.close();
}
} catch (error) {
console.error('safeCloseWebSocket error', error);
}
} |