iputil

README

iputil

go library for IP address manipulation

Documentation

Overview

Package iputil contains helper functions for IPv4 address manipulations

Index

• func FirstAdr(subnet *net.IPNet) uint32
• func IPMaskToString(mask *net.IPMask) string
• func IPToUint32(ip *net.IP) uint32
• func IncrIP(ip *net.IP, offset uint32) *net.IP
• func IsIPv4(ip *net.IP) bool
• func IsIPv4Net(ipnet *net.IPNet) bool
• func LastAdr(subnet *net.IPNet) uint32
• func NumAdr(subnet *net.IPNet) uint64
• func Overlap(subnet1, subnet2 *net.IPNet) bool
• func Uint32ToIP(adr uint32) *net.IP

Functions

func FirstAdr

func FirstAdr(subnet *net.IPNet) uint32

FirstAdr returns first IP address from a given subnet in uint32 format

func IPMaskToString

func IPMaskToString(mask *net.IPMask) string

IPMaskToString converts giver IPMask to dotted decimal format or returns nil for non-IPv4 masks

func IPToUint32

func IPToUint32(ip *net.IP) uint32

IPToUint32 converts IPv4 address from net.IP to uint32 format

func IncrIP

func IncrIP(ip *net.IP, offset uint32) *net.IP

IncrIP returns given IP address increased by given offset

func IsIPv4

func IsIPv4(ip *net.IP) bool

IsIPv4 checks whether given ip address is IPv4

func IsIPv4Net

func IsIPv4Net(ipnet *net.IPNet) bool

IsIPv4Net checks whether given ip network address is IPv4

func LastAdr

func LastAdr(subnet *net.IPNet) uint32

LastAdr returns first IP address from a given subnet in uint64 format

func NumAdr

func NumAdr(subnet *net.IPNet) uint64

NumAdr returns number of IPv4 addresses in a given subnet or zero if not IPv4

func Overlap

func Overlap(subnet1, subnet2 *net.IPNet) bool

Overlap checks whether two given subnets overlaps

func Uint32ToIP

func Uint32ToIP(adr uint32) *net.IP

Uint32ToIP converts IPv4 address from uint32 to net.IP format