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feat: add UDP and XUDP support #3

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71 changes: 10 additions & 61 deletions app.ext.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
const fs = require('fs');
const path = require('path');
const net = require('net');
const crypto = require('crypto');
const {URL} = require('url');
const {exec} = require('child_process');
Expand Down Expand Up @@ -106,53 +105,7 @@ const server = createServer((req, res) => {
}
});

/**
* Refer to: https://xtls.github.io/development/protocols/vless.html
* Parse the client handshake message and extract the version, target host/port and message offset
* @param {Buffer} buf Handshake Message Buffer
* @returns {{version:number, command:number, host:string, port:number, offset:number}}
*/
function parseHandshake(buf) {
let offset = 0;
const version = buf.readUInt8(offset);
offset += 1;

// skip uuid
offset += 16;

const optLen = buf.readUInt8(offset);
offset += 1 + optLen;

const command = buf.readUInt8(offset);
offset += 1;

const port = buf.readUInt16BE(offset);
offset += 2;

const addressType = buf.readUInt8(offset);
offset += 1;

let host;
if (addressType === 1) { // IPV4
host = Array.from(buf.subarray(offset, offset + 4)).join('.');
offset += 4;
} else if (addressType === 2) { // DOMAIN
const len = buf.readUInt8(offset++);
host = buf.subarray(offset, offset + len).toString();
offset += len;
} else if (addressType === 3) { // IPV6
const segments = [];
for (let i = 0; i < 8; i++) {
segments.push(buf.readUInt16BE(offset).toString(16));
offset += 2;
}
host = segments.join(':');
} else {
throw new Error(`Unsupported address type: ${addressType}`);
}

return {version, command, host, port, offset};
}
const {parseHandshake, relayTraffic} = require('./vless-relay');

const wss = new WebSocketServer({server});
wss.on('connection', (ws, req) => {
Expand All @@ -167,22 +120,18 @@ wss.on('connection', (ws, req) => {

ws.once('message', msg => {
try {
const {version, host, port, offset} = parseHandshake(msg);
// console.log('version: ', version, 'host: ', host, 'port: ', port, 'offset: ', offset);

ws.send(Buffer.from([version, 0]));
const handshake = parseHandshake(msg);
// console.log('version: ', handshake.version, 'id: ', handshake.id, 'host: ', handshake.host, 'port: ', handshake.port, 'offset: ', handshake.offset);

const duplex = createWebSocketStream(ws);
const socket = net.connect({host, port}, () => {
socket.write(msg.slice(offset));
duplex.pipe(socket).pipe(duplex);
});
const uuidBuf = Buffer.from(UUID.replace(/-/g, ''), 'hex');
if (!handshake.id.equals(uuidBuf)) {
return ws.close();
}

duplex.on('error', () => {});
socket.on('error', () => {});
ws.send(Buffer.from([handshake.version, 0]));

socket.on('close', () => ws.terminate());
duplex.on('close', () => socket.destroy());
const duplex = createWebSocketStream(ws);
relayTraffic(duplex, handshake, msg.subarray(handshake.offset), () => ws.terminate());

} catch (err) {
// console.error('Handshake error: ', err);
Expand Down
70 changes: 6 additions & 64 deletions app.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
const fs = require('fs');
const path = require('path');
const net = require('net');
const crypto = require('crypto');
const {URL} = require('url');
const {exec} = require('child_process');
Expand Down Expand Up @@ -91,80 +90,23 @@ const server = createServer((req, res) => {
}
});

/**
* Refer to: https://xtls.github.io/development/protocols/vless.html
* Parse the client handshake message and extract the version, UUID, target host/port and message offset
* @param {Buffer} buf Handshake Message Buffer
* @returns {{version:number, id:Buffer, command:number, host:string, port:number, offset:number}}
*/
function parseHandshake(buf) {
let offset = 0;
const version = buf.readUInt8(offset);
offset += 1;

const id = buf.subarray(offset, offset + 16);
offset += 16;

const optLen = buf.readUInt8(offset);
offset += 1 + optLen;

const command = buf.readUInt8(offset);
offset += 1;

const port = buf.readUInt16BE(offset);
offset += 2;

const addressType = buf.readUInt8(offset);
offset += 1;

let host;
if (addressType === 1) { // IPV4
host = Array.from(buf.subarray(offset, offset + 4)).join('.');
offset += 4;
} else if (addressType === 2) { // DOMAIN
const len = buf.readUInt8(offset++);
host = buf.subarray(offset, offset + len).toString();
offset += len;
} else if (addressType === 3) { // IPV6
const segments = [];
for (let i = 0; i < 8; i++) {
segments.push(buf.readUInt16BE(offset).toString(16));
offset += 2;
}
host = segments.join(':');
} else {
throw new Error(`Unsupported address type: ${addressType}`);
}

return {version, id, command, host, port, offset};
}
const {parseHandshake, relayTraffic} = require('./vless-relay');

const uuid = Buffer.from(UUID.replace(/-/g, ''), 'hex');
const wss = new WebSocketServer({server});
wss.on('connection', ws => {
ws.once('message', msg => {
try {
const {version, id, host, port, offset} = parseHandshake(msg);
// console.log('version: ', version, 'id: ', id, 'host: ', host, 'port: ', port, 'offset: ', offset);
const handshake = parseHandshake(msg);
// console.log('version: ', handshake.version, 'id: ', handshake.id, 'host: ', handshake.host, 'port: ', handshake.port, 'offset: ', handshake.offset);

if (!id.equals(uuid)) {
if (!handshake.id.equals(uuid)) {
return ws.close();
}
ws.send(Buffer.from([version, 0]));
ws.send(Buffer.from([handshake.version, 0]));

const duplex = createWebSocketStream(ws);
const socket = net.connect({host, port}, () => {
socket.write(msg.slice(offset));
duplex.pipe(socket).pipe(duplex);
});

// duplex.on('error', err => console.error('Duplex error: ', err));
// socket.on('error', err => console.error('Socket error: ', err));
duplex.on('error', () => {});
socket.on('error', () => {});

socket.on('close', () => ws.terminate());
duplex.on('close', () => socket.destroy());
relayTraffic(duplex, handshake, msg.subarray(handshake.offset), () => ws.terminate());

} catch (err) {
// console.error('Handshake error: ', err);
Expand Down
70 changes: 5 additions & 65 deletions app.tls.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
const fs = require('fs');
const path = require('path');
const net = require('net');
const crypto = require('crypto');
const {URL} = require('url');
const {exec} = require('child_process');
Expand Down Expand Up @@ -96,83 +95,24 @@ const server = createServer(options, (req, res) => {
}
});

/**
* Refer to: https://xtls.github.io/development/protocols/vless.html
* Parse the client handshake message and extract the version, UUID, target host/port and message offset
* @param {Buffer} buf Handshake Message Buffer
* @returns {{version:number, id:Buffer, command:number, host:string, port:number, offset:number}}
*/
function parseHandshake(buf) {
let offset = 0;
const version = buf.readUInt8(offset);
offset += 1;

const id = buf.subarray(offset, offset + 16);
offset += 16;

const optLen = buf.readUInt8(offset);
offset += 1 + optLen;

const command = buf.readUInt8(offset);
offset += 1;

const port = buf.readUInt16BE(offset);
offset += 2;

const addressType = buf.readUInt8(offset);
offset += 1;

let host;
if (addressType === 1) { // IPV4
host = Array.from(buf.subarray(offset, offset + 4)).join('.');
offset += 4;
} else if (addressType === 2) { // DOMAIN
const len = buf.readUInt8(offset++);
host = buf.subarray(offset, offset + len).toString();
offset += len;
} else if (addressType === 3) { // IPV6
const segments = [];
for (let i = 0; i < 8; i++) {
segments.push(buf.readUInt16BE(offset).toString(16));
offset += 2;
}
host = segments.join(':');
} else {
throw new Error(`Unsupported address type: ${addressType}`);
}

return {version, id, command, host, port, offset};
}
const {parseHandshake, relayTraffic} = require('./vless-relay');

const uuid = Buffer.from(UUID.replace(/-/g, ''), 'hex');
const wss = new WebSocketServer({server});
wss.on('connection', ws => {
ws.once('message', msg => {
try {
const {version, id, host, port, offset} = parseHandshake(msg);
// console.log('version: ', version, 'id: ', id, 'host: ', host, 'port: ', port, 'offset: ', offset);
const handshake = parseHandshake(msg);

if (!id.equals(uuid)) {
if (!handshake.id.equals(uuid)) {
return ws.close();
}
ws.send(Buffer.from([version, 0]));
ws.send(Buffer.from([handshake.version, 0]));

const duplex = createWebSocketStream(ws);
const socket = net.connect({host, port}, () => {
socket.write(msg.slice(offset));
duplex.pipe(socket).pipe(duplex);
});

// duplex.on('error', err => console.error('Duplex error: ', err));
// socket.on('error', err => console.error('Socket error: ', err));
duplex.on('error', () => {});
socket.on('error', () => {});

socket.on('close', () => ws.terminate());
duplex.on('close', () => socket.destroy());
relayTraffic(duplex, handshake, msg.subarray(handshake.offset), () => ws.terminate());

} catch (err) {
// console.error('Handshake error: ', err);
ws.close();
}
});
Expand Down
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