replay

Documentation

Index

• Constants
• Variables
• type ReplayCache
  • func NewCache(capacity int, expireInterval time.Duration) *ReplayCache
  • func (c *ReplayCache) Clear()
  • func (c *ReplayCache) IsDuplicate(data []byte, tag string) bool
  • func (c *ReplayCache) Sizes() (int, int)

Constants

const (
	EmptyTag = ""
)

Variables

var (
	// Number of replay packets sent from a new session.
	NewSession = metrics.RegisterMetric("replay", "NewSession")

	// Number of replay packets sent from a known session.
	KnownSession = metrics.RegisterMetric("replay", "KnownSession")
)

Types

type ReplayCache

type ReplayCache struct {
	// contains filtered or unexported fields
}

ReplayCache stores the signature of recent decrypted packets to avoid a replay attack.

func NewCache

func NewCache(capacity int, expireInterval time.Duration) *ReplayCache

NewCache creates a new replay cache.

func (*ReplayCache) Clear

func (c *ReplayCache) Clear()

Clear removes all the data in the replay cache.

func (*ReplayCache) IsDuplicate

func (c *ReplayCache) IsDuplicate(data []byte, tag string) bool

IsDuplicate checks if the given data is present in the replay cache. If a non-empty tag is provided, it is not considered as a duplicate when the same tag is used. This can allow retransmit exact content from the same network address. Use an empty tag disables this feature.

func (*ReplayCache) Sizes

func (c *ReplayCache) Sizes() (int, int)

Sizes returns the number of entries in `current` map and `previous` map.