package peer

import "unsafe"

type Nonce struct {
	Timestamp  int64
	Counter    uint64
	SourceIP   byte
	ViaIP      byte
	DestIP     byte
	StreamID   byte // The stream, see STREAM_* constants
	PacketType byte // The packet type. See PACKET_* constants.
}

func (nonce *Nonce) Parse(nb []byte) {
	nonce.Timestamp = *(*int64)(unsafe.Pointer(&nb[0]))
	nonce.Counter = *(*uint64)(unsafe.Pointer(&nb[8]))
	nonce.SourceIP = nb[16]
	nonce.ViaIP = nb[17]
	nonce.DestIP = nb[18]
	nonce.StreamID = nb[19]
	nonce.PacketType = nb[20]
}

func (nonce Nonce) Marshal(buf []byte) {
	*(*int64)(unsafe.Pointer(&buf[0])) = nonce.Timestamp
	*(*uint64)(unsafe.Pointer(&buf[8])) = nonce.Counter
	buf[16] = nonce.SourceIP
	buf[17] = nonce.ViaIP
	buf[18] = nonce.DestIP
	buf[19] = nonce.StreamID
	buf[20] = nonce.PacketType
}