package netutils

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

Index ¶

• Constants
• Variables
• func CheckNameserverOverlaps(nameservers []string, toCheck *net.IPNet) error
• func GenerateMACFromIP(ip net.IP) net.HardwareAddr
• func GenerateRandomMAC() net.HardwareAddr
• func GenerateRandomName(prefix string, size int) (string, error)
• func GetIfaceAddr(name string) (net.Addr, []net.Addr, error)
• func NetworkOverlaps(netX *net.IPNet, netY *net.IPNet) bool
• func NetworkRange(network *net.IPNet) (net.IP, net.IP)
• func ParseAlias(val string) (string, string, error)
• func ReverseIP(IP string) string
• func ValidateAlias(val string) (string, error)

Constants ¶

const (
	IP = iota // IPv4 and IPv6
	IPv4
	IPv6
)

constants for the IP address type

Variables ¶

var (
	// ErrNetworkOverlapsWithNameservers preformatted error
	ErrNetworkOverlapsWithNameservers = errors.New("requested network overlaps with nameserver")
	// ErrNetworkOverlaps preformatted error
	ErrNetworkOverlaps = errors.New("requested network overlaps with existing network")
	// ErrNoDefaultRoute preformatted error
	ErrNoDefaultRoute = errors.New("no default route")
)

Functions ¶

func CheckNameserverOverlaps ¶

func CheckNameserverOverlaps(nameservers []string, toCheck *net.IPNet) error

CheckNameserverOverlaps checks whether the passed network overlaps with any of the nameservers

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, size int) (string, error)

GenerateRandomName returns a new name joined with a prefix. This size specified is used to truncate the randomly generated value

func GetIfaceAddr ¶

func GetIfaceAddr(name string) (net.Addr, []net.Addr, error)

GetIfaceAddr returns the first IPv4 address and slice of IPv6 addresses for the specified network interface

func NetworkOverlaps ¶

func NetworkOverlaps(netX *net.IPNet, netY *net.IPNet) bool

NetworkOverlaps detects overlap between one IPNet and another

func NetworkRange ¶

func NetworkRange(network *net.IPNet) (net.IP, net.IP)

NetworkRange calculates the first and last IP addresses in an IPNet

func ParseAlias ¶

func ParseAlias(val string) (string, string, error)

ParseAlias parses and validates the specified string as a alias format (name:alias)

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.

func ValidateAlias ¶

func ValidateAlias(val string) (string, error)

ValidateAlias validates that the specified string has a valid alias format (containerName:alias).

Source Files ¶

utils.go