dnstap

package
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 Go to latest Published: Jan 18, 2018 License: Apache-2.0 Imports: 14 Imported by: 0

README

dnstap

Name

dnstap - enable logging to dnstap

Description

dnstap is a flexible, structured binary log format for DNS software: http://dnstap.info. With this plugin you make CoreDNS output dnstap logging.

Note that there is an internal buffer, so expect at least 13 requests before the server sends its dnstap messages to the socket.

Syntax

dnstap SOCKET [full]
  • SOCKET is the socket path supplied to the dnstap command line tool.
  • full to include the wire-format DNS message.

Examples

Log information about client requests and responses to /tmp/dnstap.sock.

dnstap /tmp/dnstap.sock

Log information including the wire-format DNS message about client requests and responses to /tmp/dnstap.sock.

dnstap unix:///tmp/dnstap.sock full

Log to a remote endpoint.

dnstap tcp://127.0.0.1:6000 full

Command Line Tool

Dnstap has a command line tool that can be used to inspect the logging. The tool can be found at Github: https://github.com/dnstap/golang-dnstap. It's written in Go.

The following command listens on the given socket and decodes messages to stdout.

% dnstap -u /tmp/dnstap.sock

The following command listens on the given socket and saves message payloads to a binary dnstap-format log file.

% dnstap -u /tmp/dnstap.sock -w /tmp/test.dnstap

Listen for dnstap messages on port 6000.

% dnstap -l 127.0.0.1:6000

See Also

dnstap.info.

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type ContextKey 

type ContextKey string

ContextKey defines the type of key that is used to save data into the context 

const (
	// DnstapSendOption specifies the Dnstap message to be send.  Default is sent all.
	DnstapSendOption ContextKey = "dnstap-send-option"
)

type Dnstap 

type Dnstap struct {
	Next plugin.Handler
	IO   IORoutine
	Pack bool
}

Dnstap is the dnstap handler.

func (Dnstap) Name 

func (h Dnstap) Name() string

Name returns dnstap.

func (Dnstap) ServeDNS 

func (h Dnstap) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error)

ServeDNS logs the client query and response to dnstap and passes the dnstap Context.

func (Dnstap) TapBuilder 

func (h Dnstap) TapBuilder() msg.Builder

TapBuilder implements Tapper.

func (Dnstap) TapMessage 

func (h Dnstap) TapMessage(m *tap.Message) error

TapMessage implements Tapper.

type IORoutine 

type IORoutine interface {
	Dnstap(tap.Dnstap)
}

IORoutine is the dnstap I/O thread as defined by: <http://dnstap.info/Architecture>.

type Tapper 

type Tapper interface {
	TapMessage(*tap.Message) error
	TapBuilder() msg.Builder
}

Tapper is implemented by the Context passed by the dnstap handler.

func TapperFromContext 

func TapperFromContext(ctx context.Context) (t Tapper)

TapperFromContext will return a Tapper if the dnstap plugin is enabled.

Source Files

View all Source files

Directories

Path Synopsis
Package msg helps to build a dnstap Message.
 Package msg helps to build a dnstap Message.
Package taprw takes a query and intercepts the response.
 Package taprw takes a query and intercepts the response.

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