Function toNtpSecondsAndFrac

ntp/ntp.ts:53–57

(ms: number)

function readNtpTimestamp(buf: Buffer, offset: number): number | undefined {
  if (!buf || buf.length < offset + 8) return undefined;
  const sec = buf.readUInt32BE(offset);
  const frac = buf.readUInt32BE(offset + 4);
  if (sec === 0 && frac === 0) return undefined; // not provided
  const ms = (sec - NTP_EPOCH_OFFSET) * 1000 + Math.floor((frac / 2 ** 32) * 1000);
  return ms;
}