cache

package

v1.0.6 Latest Latest Go to latest Published: Sep 13, 2015 License: Apache-2.0 Imports: 5 Imported by: 0

Details

This section is empty.

This section is empty.

func Key(rrs []dns.RR) string

Key uses the name, type and rdata, which is serialized and then hashed as the key for the lookup.

func QuestionKey(q dns.Question, dnssec bool) string

QuestionKey creates a hash key from a question section. It creates a different key for requests with DNSSEC.

type Cache struct {
	sync.Mutex
	// contains filtered or unexported fields
}

Cache is a LRU cache that holds on the a number of RRs or DNS messgas.

func New(capacity, ttl int) *Cache

New returns a new cache with the capacity and the ttl specified.

func (c *Cache) Capacity() int

Capacity returns the capacity of the cache as an int.

func (c *Cache) InsertMessage(s string, msg *dns.Msg)

InsertMessage inserts a message in the Cache. We will cache it for ttl seconds, which should be a small (60...300) integer.

func (c *Cache) InsertSignature(s string, sig *dns.RRSIG)

InsertSignature inserts a signature, the expiration time is used as the cache ttl.

func (c *Cache) Remove(s string)

Remove removes the element under key s from the cache.

func (c *Cache) Search(s string) (*dns.Msg, time.Time, bool)

Search returns .... and a boolean indicating if we found something in the cache.

func (c *Cache) Size() int

Size returns the size of the cache as an int.