Function processVlessHeader

edge/LoadBalance.js:316–423

* * @param { ArrayBuffer} vlessBuffer * @param {string} userID * @returns

(vlessBuffer, 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) {
    isValidUser = true;
  }
  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) {
  } 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)
  );

  // 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: