local

Documentation

Overview

Package local (aka internal/resolver/local) is a resolver implementation which handle local lookups via /etc/resolv.conf. It more-or-less implements res_send(3).

Index

• func New(config Config) (*local, error)
• type Config
• type DNSClientExchanger

Functions

func New

func New(config Config) (*local, error)

New is the constructor for a local resolver

Types

type Config

type Config struct {
	ResolvConfPath string
	LocalDomains   []string // In addition to those found in the resolvConfPath

	// Caller can create their own Exchangers on our behalf
	NewDNSClientExchangerFunc func(net string) DNSClientExchanger
}

Config is passed to the New() constructor.

type DNSClientExchanger

type DNSClientExchanger interface {
	Exchange(query *dns.Msg, server string) (reply *dns.Msg, rtt time.Duration, err error)
}

DNSClientExchanger is an interface which implements dns.Client.Exchange() - the only dns.Client method used by localresolver. It exists so we can supply a mock dns.Client for testing.