netutil

Documentation

Overview

Package netutil provides utility functions extending the stdnet package.

Index

• func CheckUDP(local, remote *net.UDPAddr, checkAddress bool, checkPort bool) error
• func GetPublicIP(ctx context.Context, preferIPv6 bool) (net.IP, error)
• func IsIPv4(ip net.IP) bool
• func IsTemporaryError(err error) bool
• func IsValidPort(port int) bool

Functions

func CheckUDP

func CheckUDP(local, remote *net.UDPAddr, checkAddress bool, checkPort bool) error

CheckUDP checks whether data send to remote is received at local, otherwise an error is returned. If checkAddress is set, it checks whether the IP address that was on the packet matches remote. If checkPort is set, it checks whether the port that was on the packet matches remote.

func GetPublicIP

func GetPublicIP(ctx context.Context, preferIPv6 bool) (net.IP, error)

GetPublicIP queries the ipify API for the public IP address.

func IsIPv4

func IsIPv4(ip net.IP) bool

IsIPv4 returns true if ip is an IPv4 address.

func IsTemporaryError

func IsTemporaryError(err error) bool

IsTemporaryError checks whether the given error should be considered temporary.

func IsValidPort

func IsValidPort(port int) bool

IsValidPort returns true if port is a valid port number.