port

Documentation

Overview

Package port provides port ID allocation for netlink sockets.

A netlink port is any int32 value. Positive ports are typically equivalent to the PID of the binding process. If that port is unavailable, negative ports are searched to find a free port that will not conflict with other PIDS.

Index

• type Manager
  • func New() *Manager
  • func (m *Manager) Allocate(protocol int, hint int32) (int32, bool)
  • func (m *Manager) Release(protocol int, port int32)

Types

type Manager

type Manager struct {
	// contains filtered or unexported fields
}

Manager allocates netlink port IDs.

+stateify savable

func New

func New() *Manager

New creates a new Manager.

func (*Manager) Allocate

func (m *Manager) Allocate(protocol int, hint int32) (int32, bool)

Allocate reserves a new port ID for protocol. hint will be taken if available.

func (*Manager) Release

func (m *Manager) Release(protocol int, port int32)

Release frees the specified port for protocol.

Preconditions: port is already allocated.