dnscache

package

v1.3.6 Latest Latest Go to latest Published: Apr 19, 2024 License: MIT Imports: 4 Imported by: 0

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type Cacher interface {
	Get(Key) *Value
	Add(Key, *Value)
	Purge()
}

Cacher is the interface for caching DNS response.

type Key struct {
	Qtype    uint16
	Qclass   uint16
	Name     string
	Upstream string
}

Key is the caching key for DNS message.

func NewKey(msg *dns.Msg, upstream string) Key

NewKey creates a new cache key for given DNS message.

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

LRUCache implements Cacher interface.

func NewLRUCache(size int) (*LRUCache, error)

NewLRUCache creates a new LRUCache instance with given size.

func (l *LRUCache) Add(key Key, value *Value)

Add adds a value to cache.

func (l *LRUCache) Get(key Key) *Value

Get looks up key's value from cache.

func (l *LRUCache) Purge()

Purge clears the cache.

type Value struct {
	Expire time.Time
	Msg    *dns.Msg
}

func NewValue(msg *dns.Msg, expire time.Time) *Value

NewValue creates a new cache value for given DNS message.