// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package net
import (
"errors"
"sync"
"time"
)
// BUG(mikio): On NaCl, methods and functions related to
// Interface are not implemented.
// BUG(mikio): On DragonFly BSD, NetBSD, OpenBSD, Plan 9 and Solaris,
// the MulticastAddrs method of Interface is not implemented.
var (
errInvalidInterface = errors.New("invalid network interface")
errInvalidInterfaceIndex = errors.New("invalid network interface index")
errInvalidInterfaceName = errors.New("invalid network interface name")
errNoSuchInterface = errors.New("no such network interface")
errNoSuchMulticastInterface = errors.New("no such multicast network interface")
)
// Interface represents a mapping between network interface name
// and index. It also represents network interface facility
// information.
type Interface struct {
Index int // positive integer that starts at one, zero is never used
MTU int // maximum transmission unit
Name string // e.g., "en0", "lo0", "eth0.100"
HardwareAddr HardwareAddr // IEEE MAC-48, EUI-48 and EUI-64 form
Flags Flags // e.g., FlagUp, FlagLoopback, FlagMulticast
}
type Flags uint
const (
FlagUp Flags = 1 << iota // interface is up
FlagBroadcast // interface supports broadcast access capability
FlagLoopback // interface is a loopback interface
FlagPointToPoint // interface belongs to a point-to-point link
FlagMulticast // interface supports multicast access capability
)
var flagNames = []string{
"up",
"broadcast",
"loopback",
"pointtopoint",
"multicast",
}
func (f Flags) String() string {
s := ""
for i, name := range flagNames {
if f&(1<