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- // Copyright 2016 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 (
- "syscall"
- "golang.org/x/net/lif"
- )
- // If the ifindex is zero, interfaceTable returns mappings of all
- // network interfaces. Otherwise it returns a mapping of a specific
- // interface.
- func interfaceTable(ifindex int) ([]Interface, error) {
- lls, err := lif.Links(syscall.AF_UNSPEC, "")
- if err != nil {
- return nil, err
- }
- var ift []Interface
- for _, ll := range lls {
- if ifindex != 0 && ifindex != ll.Index {
- continue
- }
- ifi := Interface{Index: ll.Index, MTU: ll.MTU, Name: ll.Name, Flags: linkFlags(ll.Flags)}
- if len(ll.Addr) > 0 {
- ifi.HardwareAddr = HardwareAddr(ll.Addr)
- }
- ift = append(ift, ifi)
- }
- return ift, nil
- }
- func linkFlags(rawFlags int) Flags {
- var f Flags
- if rawFlags&syscall.IFF_UP != 0 {
- f |= FlagUp
- }
- if rawFlags&syscall.IFF_BROADCAST != 0 {
- f |= FlagBroadcast
- }
- if rawFlags&syscall.IFF_LOOPBACK != 0 {
- f |= FlagLoopback
- }
- if rawFlags&syscall.IFF_POINTOPOINT != 0 {
- f |= FlagPointToPoint
- }
- if rawFlags&syscall.IFF_MULTICAST != 0 {
- f |= FlagMulticast
- }
- return f
- }
- // If the ifi is nil, interfaceAddrTable returns addresses for all
- // network interfaces. Otherwise it returns addresses for a specific
- // interface.
- func interfaceAddrTable(ifi *Interface) ([]Addr, error) {
- var name string
- if ifi != nil {
- name = ifi.Name
- }
- as, err := lif.Addrs(syscall.AF_UNSPEC, name)
- if err != nil {
- return nil, err
- }
- var ifat []Addr
- for _, a := range as {
- var ip IP
- var mask IPMask
- switch a := a.(type) {
- case *lif.Inet4Addr:
- ip = IPv4(a.IP[0], a.IP[1], a.IP[2], a.IP[3])
- mask = CIDRMask(a.PrefixLen, 8*IPv4len)
- case *lif.Inet6Addr:
- ip = make(IP, IPv6len)
- copy(ip, a.IP[:])
- mask = CIDRMask(a.PrefixLen, 8*IPv6len)
- }
- ifat = append(ifat, &IPNet{IP: ip, Mask: mask})
- }
- return ifat, nil
- }
- // interfaceMulticastAddrTable returns addresses for a specific
- // interface.
- func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
- return nil, nil
- }
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