M3

M3.js

icmpSocket.on('message', async function (buffer, ip) {
    let p = buffer.toString('hex').substr(100, 4);
    let portNumber = parseInt(p, 16);
    if (port === portNumber) {
      try {
        let symbolicAddress;
        if (!NO_REVERSE_LOOKUP) {
          symbolicAddress = await getSymbolicAddress(ip);
        }
        handleReply(ip, symbolicAddress)[0];
      } catch (e) {
        handleReply(ip);
      }
    }
  });