Function processVlessHeader

_worker.js:456–572

* Processes the VLESS header buffer and returns an object with the relevant information. * @param {ArrayBuffer} vlessBuffer The VLESS header buffer to process. * @param {string} userID The user ID to validate against the UUID in the VLESS header. * @returns {{ * hasError: boolean, * mess

(vlessBuffer, userID)

 * }} An object with the relevant information extracted from the VLESS header buffer.
 */
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;
	const slicedBuffer = new Uint8Array(vlessBuffer.slice(1, 17));
	const slicedBufferString = stringify(slicedBuffer);
	// check if userID is valid uuid or uuids split by , and contains userID in it otherwise return error message to console
	const uuids = userID.includes(',') ? userID.split(",") : [userID];
	console.log(slicedBufferString, uuids);

	// isValidUser = uuids.some(userUuid => slicedBufferString === userUuid.trim());
	isValidUser = uuids.some(userUuid => slicedBufferString === userUuid.trim()) || uuids.length === 1 && slicedBufferString === uuids[0].trim();

	console.log(`userID: ${slicedBufferString}`);

	if (!isValidUser) {
		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) {
		isUDP = false;
	} 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 = new DataView(portBuffer).getUint16(0);

	let addressIndex = portIndex + 2;
	const addressBuffer = new Uint8Array(
		vlessBuffer.slice(addressIndex, addressIndex + 1)
	);