request

Documentation

Overview

Package request abstracts a client's request so that all plugins will handle them in an unified way.

Index

• func Proto(w dns.ResponseWriter) string
• type Request
  • func (r *Request) Class() string
  • func (r *Request) Clear()
  • func (r *Request) Do() bool
  • func (r *Request) Family() int
  • func (r *Request) IP() string
  • func (r *Request) Len() int
  • func (r *Request) LocalAddr() string
  • func (r *Request) LocalIP() string
  • func (r *Request) LocalPort() string
  • func (r *Request) Match(reply *dns.Msg) bool
  • func (r *Request) Name() string
  • func (r *Request) NewWithQuestion(name string, typ uint16) Request
  • func (r *Request) Port() string
  • func (r *Request) Proto() string
  • func (r *Request) QClass() uint16
  • func (r *Request) QName() string
  • func (r *Request) QType() uint16
  • func (r *Request) RemoteAddr() string
  • func (r *Request) Scrub(reply *dns.Msg) *dns.Msg
  • func (r *Request) Size() int
  • func (r *Request) SizeAndDo(m *dns.Msg) bool
  • func (r *Request) Type() string
• type ScrubWriter
  • func NewScrubWriter(req *dns.Msg, w dns.ResponseWriter) *ScrubWriter
  • func (s *ScrubWriter) WriteMsg(m *dns.Msg) error

Functions

func Proto

func Proto(w dns.ResponseWriter) string

Proto gets the protocol used as the transport. This will be udp or tcp.

Types

type Request

type Request struct {
	Req *dns.Msg
	W   dns.ResponseWriter

	// Optional lowercased zone of this query.
	Zone string
	// contains filtered or unexported fields
}

Request contains some connection state and is useful in plugin.

func (*Request) Class

func (r *Request) Class() string

Class returns the class of the question in the request. If the request is malformed the empty string is returned.

func (*Request) Clear

func (r *Request) Clear()

Clear clears all caching from Request s.

func (*Request) Do

func (r *Request) Do() bool

Do returns if the request has the DO (DNSSEC OK) bit set.

func (*Request) Family

func (r *Request) Family() int

Family returns the family of the transport, 1 for IPv4 and 2 for IPv6.

func (*Request) IP

func (r *Request) IP() string

IP gets the (remote) IP address of the client making the request.

func (*Request) Len

func (r *Request) Len() int

Len returns the length in bytes in the request.

func (*Request) LocalAddr

func (r *Request) LocalAddr() string

LocalAddr returns the net.Addr of the server handling the current request.

func (*Request) LocalIP

func (r *Request) LocalIP() string

LocalIP gets the (local) IP address of server handling the request.

func (*Request) LocalPort

func (r *Request) LocalPort() string

LocalPort gets the local port of the server handling the request.

func (*Request) Match

func (r *Request) Match(reply *dns.Msg) bool

Match checks if the reply matches the qname and qtype from the request, it returns false when they don't match.

func (*Request) Name

func (r *Request) Name() string

Name returns the name of the question in the request. Note this name will always have a closing dot and will be lower cased. After a call Name the value will be cached. To clear this caching call Clear. If the request is malformed the root zone is returned.

func (*Request) NewWithQuestion

func (r *Request) NewWithQuestion(name string, typ uint16) Request

NewWithQuestion returns a new request based on the old, but with a new question section in the request.

func (*Request) Port

func (r *Request) Port() string

Port gets the (remote) port of the client making the request.

func (*Request) Proto

func (r *Request) Proto() string

Proto gets the protocol used as the transport. This will be udp or tcp.

func (*Request) QClass

func (r *Request) QClass() uint16

QClass returns the class of the question in the request. If the request is malformed 0 returned.

func (*Request) QName

func (r *Request) QName() string

QName returns the name of the question in the request. If the request is malformed the root zone is returned.

func (*Request) QType

func (r *Request) QType() uint16

QType returns the type of the question as an uint16. If the request is malformed 0 is returned.

func (*Request) RemoteAddr

func (r *Request) RemoteAddr() string

RemoteAddr returns the net.Addr of the client that sent the current request.

func (*Request) Scrub

func (r *Request) Scrub(reply *dns.Msg) *dns.Msg

Scrub scrubs the reply message so that it will fit the client's buffer. It will first check if the reply fits without compression and then *with* compression. Note, the TC bit will be set regardless of protocol, even TCP message will get the bit, the client should then retry with pigeons.

func (*Request) Size

func (r *Request) Size() int

Size returns if buffer size *advertised* in the requests OPT record. Or when the request was over TCP, we return the maximum allowed size of 64K.

func (*Request) SizeAndDo

func (r *Request) SizeAndDo(m *dns.Msg) bool

SizeAndDo adds an OPT record that the reflects the intent from request. The returned bool indicates if an record was found and normalised.

func (*Request) Type

func (r *Request) Type() string

Type returns the type of the question as a string. If the request is malformed the empty string is returned.

type ScrubWriter

type ScrubWriter struct {
	dns.ResponseWriter
	// contains filtered or unexported fields
}

ScrubWriter will, when writing the message, call scrub to make it fit the client's buffer.

func NewScrubWriter

func NewScrubWriter(req *dns.Msg, w dns.ResponseWriter) *ScrubWriter

NewScrubWriter returns a new and initialized ScrubWriter.

func (*ScrubWriter) WriteMsg

func (s *ScrubWriter) WriteMsg(m *dns.Msg) error

WriteMsg overrides the default implementation of the underlying dns.ResponseWriter and calls scrub on the message m and will then write it to the client.