dns

Documentation

Index

• Constants
• func ReCreateServer(addr string, resolver *Resolver, mapper *ResolverEnhancer)
• type Config
• type NameServer
• type Resolver
  • func NewResolver(config Config) *Resolver
  • func (r *Resolver) Exchange(m *dns.Msg) (msg *dns.Msg, err error)
  • func (r *Resolver) ExchangeContext(ctx context.Context, m *dns.Msg) (msg *dns.Msg, err error)
  • func (r *Resolver) LookupIP(ctx context.Context, host string) (ip []net.IP, err error)
  • func (r *Resolver) LookupIPv4(ctx context.Context, host string) ([]net.IP, error)
  • func (r *Resolver) LookupIPv6(ctx context.Context, host string) ([]net.IP, error)
  • func (r *Resolver) ResolveIP(host string) (ip net.IP, err error)
  • func (r *Resolver) ResolveIPv4(host string) (ip net.IP, err error)
  • func (r *Resolver) ResolveIPv6(host string) (ip net.IP, err error)
• type ResolverEnhancer
  • func NewEnhancer() *ResolverEnhancer
  • func (h *ResolverEnhancer) FindHostByIP(ip net.IP) (string, bool)
  • func (h *ResolverEnhancer) MappingEnabled() bool
  • func (h *ResolverEnhancer) PatchFrom(o *ResolverEnhancer)
• type Server
  • func (s *Server) ServeDNS(w dns.ResponseWriter, r *dns.Msg)

Constants

const (
	IfaceTTL    = time.Second * 20
	DHCPTTL     = time.Hour
	DHCPTimeout = time.Minute
)

Functions

func ReCreateServer

func ReCreateServer(addr string, resolver *Resolver, mapper *ResolverEnhancer)

Types

type Config

type Config struct {
	NameServers []NameServer
	Hosts       *trie.DomainTrie
}

type NameServer

type NameServer struct {
	Net       string
	Addr      string
	Interface string
}

type Resolver

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

func NewResolver

func NewResolver(config Config) *Resolver

func (*Resolver) Exchange

func (r *Resolver) Exchange(m *dns.Msg) (msg *dns.Msg, err error)

Exchange a batch of dns request, and it use cache

func (*Resolver) ExchangeContext

func (r *Resolver) ExchangeContext(ctx context.Context, m *dns.Msg) (msg *dns.Msg, err error)

ExchangeContext a batch of dns request with context.Context, and it use cache

func (*Resolver) LookupIP

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

LookupIP request with TypeA and TypeAAAA, priority return TypeA

func (*Resolver) LookupIPv4

func (r *Resolver) LookupIPv4(ctx context.Context, host string) ([]net.IP, error)

LookupIPv4 request with TypeA

func (*Resolver) LookupIPv6

func (r *Resolver) LookupIPv6(ctx context.Context, host string) ([]net.IP, error)

LookupIPv6 request with TypeAAAA

func (*Resolver) ResolveIP

func (r *Resolver) ResolveIP(host string) (ip net.IP, err error)

ResolveIP request with TypeA and TypeAAAA, priority return TypeA

func (*Resolver) ResolveIPv4

func (r *Resolver) ResolveIPv4(host string) (ip net.IP, err error)

ResolveIPv4 request with TypeA

func (*Resolver) ResolveIPv6

func (r *Resolver) ResolveIPv6(host string) (ip net.IP, err error)

ResolveIPv6 request with TypeAAAA

type ResolverEnhancer

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

func NewEnhancer

func NewEnhancer() *ResolverEnhancer

func (*ResolverEnhancer) FindHostByIP

func (h *ResolverEnhancer) FindHostByIP(ip net.IP) (string, bool)

func (*ResolverEnhancer) MappingEnabled

func (h *ResolverEnhancer) MappingEnabled() bool

func (*ResolverEnhancer) PatchFrom

func (h *ResolverEnhancer) PatchFrom(o *ResolverEnhancer)

type Server

type Server struct {
	*dns.Server
	// contains filtered or unexported fields
}

func (*Server) ServeDNS

func (s *Server) ServeDNS(w dns.ResponseWriter, r *dns.Msg)

ServeDNS implement dns.Handler ServeDNS