package protocol

// A PacketNumber in QUIC
type PacketNumber uint64

// PacketNumberLen is the length of the packet number in bytes
type PacketNumberLen uint8

const (
	// PacketNumberLenInvalid is the default value and not a valid length for a packet number
	PacketNumberLenInvalid PacketNumberLen = 0
	// PacketNumberLen1 is a packet number length of 1 byte
	PacketNumberLen1 PacketNumberLen = 1
	// PacketNumberLen2 is a packet number length of 2 bytes
	PacketNumberLen2 PacketNumberLen = 2
	// PacketNumberLen4 is a packet number length of 4 bytes
	PacketNumberLen4 PacketNumberLen = 4
	// PacketNumberLen6 is a packet number length of 6 bytes
	PacketNumberLen6 PacketNumberLen = 6
)

// A ConnectionID in QUIC
type ConnectionID uint64

// A StreamID in QUIC
type StreamID uint32

// A ByteCount in QUIC
type ByteCount uint64

// An ErrorCode in QUIC
type ErrorCode uint32

// MaxPacketSize is the maximum packet size, including the public header
const MaxPacketSize ByteCount = 1452

// MaxFrameAndPublicHeaderSize is the maximum size of a QUIC frame plus PublicHeader
const MaxFrameAndPublicHeaderSize = MaxPacketSize - 1 /*private header*/ - 12 /*crypto signature*/

// DefaultTCPMSS is the default maximum packet size used in the Linux TCP implementation.
// Used in QUIC for congestion window computations in bytes.
const DefaultTCPMSS ByteCount = 1460

// InitialCongestionWindow is the initial congestion window in QUIC packets
const InitialCongestionWindow PacketNumber = 32

// MaxCongestionWindow is the maximum size of the CWND, in packets.
// TODO: Unused?
const MaxCongestionWindow PacketNumber = 200

// DefaultMaxCongestionWindow is the default for the max congestion window
// Taken from Chrome
const DefaultMaxCongestionWindow PacketNumber = 107

// MaxUndecryptablePackets limits the number of undecryptable packets that a
// session queues for later until it sends a public reset.
const MaxUndecryptablePackets = 10