package netutils

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

Index ¶

• Variables
• func CheckNameserverOverlaps(nameservers []string, toCheck *net.IPNet) error
• func CheckRouteOverlaps(toCheck *net.IPNet) error
• func GenerateIfaceName(prefix string, len int) (string, 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)

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 CheckRouteOverlaps ¶

func CheckRouteOverlaps(toCheck *net.IPNet) error

CheckRouteOverlaps checks whether the passed network overlaps with any existing routes

func GenerateIfaceName ¶

func GenerateIfaceName(prefix string, len int) (string, error)

GenerateIfaceName returns an interface name using the passed in prefix and the length of random bytes. The api ensures that the there are is no interface which exists with that name.

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 utils_linux.go