mdns

README

mdns

Multicast DNS listener

Documentation

Index

• Variables
• func PrintServices()
• type Entry
  • func (e *Entry) String() string
• type Handler
  • func NewHandler(nic string) (c *Handler, err error)
  • func (c *Handler) AddNotificationChannel(notification chan<- Entry) error
  • func (c *Handler) ListenAndServe(ctx context.Context) error
  • func (c *Handler) PrintTable()
  • func (c *Handler) QueryAll() error
  • func (c *Handler) SendQuery(service string) error

Variables

var (
	// Debug controls the level of logging in module. By default the module is silent.
	// Set Debug to true to see module logs.
	Debug bool

	// ErrInvalidChannel nil channel passed for notification
	ErrInvalidChannel = errors.New("invalid channel")
)

Functions

func PrintServices

func PrintServices()

PrintServices log the services table

Types

type Entry

type Entry struct {
	IPv4  net.IP
	IPv6  net.IP
	Name  string
	Model string
	// contains filtered or unexported fields
}

Entry contains a full record of a mDNS entry

Simplified mdns entry to show the record by IPv4

func (*Entry) String

func (e *Entry) String() string

String return a simple Entry string

type Handler

type Handler struct {
	sync.Mutex // anonymous
	// contains filtered or unexported fields
}

Handler provides a query interface that can be used to search for service providers using mDNS

func NewHandler

func NewHandler(nic string) (c *Handler, err error)

NewHandler creates an IPv4 Multicast DNS handler for a given interface It will also attempt to create an IPv6 port if available.

func (*Handler) AddNotificationChannel

func (c *Handler) AddNotificationChannel(notification chan<- Entry) error

AddNotificationChannel set the channel for notifications

func (*Handler) ListenAndServe

func (c *Handler) ListenAndServe(ctx context.Context) error

ListenAndServe is the main loop to listen for MDNS packets.

func (*Handler) PrintTable

func (c *Handler) PrintTable()

PrintTable log the printer table

func (*Handler) QueryAll

func (c *Handler) QueryAll() error

QueryAll send a mdns discovery packet plus a mdns query for each active service on the LAN

func (*Handler) SendQuery

func (c *Handler) SendQuery(service string) error

SendQuery is used to send a multicast a query