dnscache

Documentation

Overview

Package dnscache contains a minimal DNS cache that makes a bunch of assumptions that are only valid for us. Not recommended for general use.

Index

• type Resolver
  • func Get() *Resolver
  • func (r *Resolver) LookupIP(ctx context.Context, host string) (net.IP, error)

Types

type Resolver

type Resolver struct {
	// Forward is the resolver to use to populate the cache.
	// If nil, net.DefaultResolver is used.
	Forward *net.Resolver
	// contains filtered or unexported fields
}

Resolver is a minimal DNS caching resolver.

The TTL is always fixed for now. It's not intended for general use. Cache entries are never cleaned up so it's intended that this is only used with a fixed set of hostnames.

func Get

func Get() *Resolver

Get returns a caching Resolver singleton.

func (*Resolver) LookupIP

func (r *Resolver) LookupIP(ctx context.Context, host string) (net.IP, error)

LookupIP returns the first IPv4 address found, otherwise the first IPv6 address.