util

package
v1.9.4 Latest Latest
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Published: Mar 12, 2018 License: Apache-2.0 Imports: 9 Imported by: 0

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Constants

View Source
const NoConnectionToDelete = "0 flow entries have been deleted"

Variables

This section is empty.

Functions

func ClearUDPConntrackForIP added in v1.8.0

func ClearUDPConntrackForIP(execer exec.Interface, ip string) error

ClearUDPConntrackForIP uses the conntrack tool to delete the conntrack entries for the UDP connections specified by the given service IP

func ClearUDPConntrackForPeers added in v1.8.0

func ClearUDPConntrackForPeers(execer exec.Interface, origin, dest string) error

ClearUDPConntrackForPeers uses the conntrack tool to delete the conntrack entries for the UDP connections specified by the {origin, dest} IP pair.

func ClearUDPConntrackForPort added in v1.8.0

func ClearUDPConntrackForPort(execer exec.Interface, port int, isIPv6 bool) error

ClearUDPConntrackForPort uses the conntrack tool to delete the conntrack entries for the UDP connections specified by the port. When a packet arrives, it will not go through NAT table again, because it is not "the first" packet. The solution is clearing the conntrack. Known issues: https://github.com/docker/docker/issues/8795 https://github.com/kubernetes/kubernetes/issues/31983

func ExecConntrackTool

func ExecConntrackTool(execer exec.Interface, parameters ...string) error

ExecConntrackTool executes the conntrack tool using the given parameters

func IPPart added in v1.9.0

func IPPart(s string) string

IPPart returns just the IP part of an IP or IP:port or endpoint string. If the IP part is an IPv6 address enclosed in brackets (e.g. "[fd00:1::5]:9999"), then the brackets are stripped as well.

func IsIPv6 added in v1.9.0

func IsIPv6(netIP net.IP) bool

func IsIPv6String added in v1.9.0

func IsIPv6String(ip string) bool

func IsLocalIP added in v1.8.0

func IsLocalIP(ip string) (bool, error)

func PortPart added in v1.9.0

func PortPart(s string) (int, error)

func RevertPorts added in v1.8.0

func RevertPorts(replacementPortsMap, originalPortsMap map[LocalPort]Closeable)

RevertPorts is closing ports in replacementPortsMap but not in originalPortsMap. In other words, it only closes the ports opened in this sync.

func ShouldSkipService added in v1.8.0

func ShouldSkipService(svcName types.NamespacedName, service *api.Service) bool

func ToCIDR added in v1.9.0

func ToCIDR(ip net.IP) string

ToCIDR returns a host address of the form <ip-address>/32 for IPv4 and <ip-address>/128 for IPv6

Types

type Closeable added in v1.8.0

type Closeable interface {
	Close() error
}

Closeable is an interface around closing an port.

type LocalPort added in v1.8.0

type LocalPort struct {
	// Description is the identity message of a given local port.
	Description string
	// IP is the IP address part of a given local port.
	// If this string is empty, the port binds to all local IP addresses.
	IP string
	// Port is the port part of a given local port.
	Port int
	// Protocol is the protocol part of a given local port.
	// The value is assumed to be lower-case. For example, "udp" not "UDP", "tcp" not "TCP".
	Protocol string
}

LocalPort describes a port on specific IP address and protocol

func (*LocalPort) String added in v1.8.0

func (lp *LocalPort) String() string

type PortOpener added in v1.8.0

type PortOpener interface {
	OpenLocalPort(lp *LocalPort) (Closeable, error)
}

PortOpener is an interface around port opening/closing. Abstracted out for testing.

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