package netutils

import "github.com/docker/docker/libnetwork/netutils"

Package netutils provides network utility functions.

Index ¶

• func GenerateMACFromIP(ip net.IP) net.HardwareAddr
• func GenerateRandomMAC() net.HardwareAddr
• func GenerateRandomName(prefix string, length int) (string, error)
• func IsV6Listenable() bool
• func MustParseMAC(s string) net.HardwareAddr
• func ReverseIP(IP string) string

Functions ¶

func GenerateMACFromIP ¶

func GenerateMACFromIP(ip net.IP) net.HardwareAddr

GenerateMACFromIP returns a locally administered MAC address where the 4 least significant bytes are derived from the IPv4 address.

func GenerateRandomMAC ¶

func GenerateRandomMAC() net.HardwareAddr

GenerateRandomMAC returns a new 6-byte(48-bit) hardware address (MAC)

func GenerateRandomName ¶

func GenerateRandomName(prefix string, length int) (string, error)

GenerateRandomName returns a string of the specified length, created by joining the prefix to random hex characters. The length must be strictly larger than len(prefix), or an error will be returned.

func IsV6Listenable ¶

func IsV6Listenable() bool

IsV6Listenable returns true when `[::1]:0` is listenable. IsV6Listenable returns false mostly when the kernel was booted with `ipv6.disable=1` option.

func MustParseMAC ¶

func MustParseMAC(s string) net.HardwareAddr

MustParseMAC returns a net.HardwareAddr or panic.

func ReverseIP ¶

func ReverseIP(IP string) string

ReverseIP accepts a V4 or V6 IP string in the canonical form and returns a reversed IP in the dotted decimal form . This is used to setup the IP to service name mapping in the optimal way for the DNS PTR queries.

Source Files ¶

utils.go