package peer

import "unsafe"

func ParseNonceBytes(nb []byte, nonce *Nonce) {
	nonce.Counter = *(*uint64)(unsafe.Pointer(&nb[0]))
	nonce.SourceIP = nb[8]
	nonce.ViaIP = nb[9]
	nonce.DestIP = nb[10]
	nonce.StreamID = nb[11]
	nonce.PacketType = nb[12]
}

func MarshalNonce(nonce Nonce, buf []byte) {
	*(*uint64)(unsafe.Pointer(&buf[0])) = nonce.Counter
	buf[8] = nonce.SourceIP
	buf[9] = nonce.ViaIP
	buf[10] = nonce.DestIP
	buf[11] = nonce.StreamID
	buf[12] = nonce.PacketType
	clear(buf[13:])
}

func CounterTimestamp(counter uint64) int64 {
	return int64(counter >> 30)
}