nattest

Documentation

Overview

package nattest provides the capability to test a nat-traversed UDP connection by sending packets back and forth between client and server. The client sends 10 packets containing "Ping" to the server, spaced out by 2 seconds. Once the server receives a Ping packet, it responds with 10 packets containing "Pong", spaced out by 2 seconds, and then terminates. Once the client receives a "Pong" packet, it considers the traversal successful.

Note - both the client and server ignore unexpected (gibberish) packets, so as long as client and server both get at least one good packet, the connection is considered successful.

Index

• Constants
• func Ping(local *net.UDPAddr, remote *net.UDPAddr) bool
• func Serve(local *net.UDPAddr) error

Constants

const (
	NumUDPTestPackets = 10
	PacketPause       = 2 * time.Second
	ConnTimeout       = NumUDPTestPackets * PacketPause
)

Functions

func Ping

func Ping(local *net.UDPAddr, remote *net.UDPAddr) bool

Ping pings the server at the other end of a NAT-traversed UDP connection and looks for echo packets to confirm connectivity with the server. It returns true if connectivity was confirmed, false otherwise.

func Serve

func Serve(local *net.UDPAddr) error