1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
// 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.
//go:build solaris
// +build solaris
package lif
import (
"syscall"
"unsafe"
)
// A Link represents logical data link information.
//
// It also represents base information for logical network interface.
// On Solaris, each logical network interface represents network layer
// adjacency information and the interface has a only single network
// address or address pair for tunneling. It's usual that multiple
// logical network interfaces share the same logical data link.
type Link struct {
Name string // name, equivalent to IP interface name
Index int // index, equivalent to IP interface index
Type int // type
Flags int // flags
MTU int // maximum transmission unit, basically link MTU but may differ between IP address families
Addr []byte // address
}
func (ll *Link) fetch(s uintptr) {
var lifr lifreq
for i := 0; i < len(ll.Name); i++ {
lifr.Name[i] = int8(ll.Name[i])
}
ioc := int64(syscall.SIOCGLIFINDEX)
if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
ll.Index = int(nativeEndian.Uint32(lifr.Lifru[:4]))
}
ioc = int64(syscall.SIOCGLIFFLAGS)
if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
ll.Flags = int(nativeEndian.Uint64(lifr.Lifru[:8]))
}
ioc = int64(syscall.SIOCGLIFMTU)
if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
ll.MTU = int(nativeEndian.Uint32(lifr.Lifru[:4]))
}
switch ll.Type {
case syscall.IFT_IPV4, syscall.IFT_IPV6, syscall.IFT_6TO4:
default:
ioc = int64(syscall.SIOCGLIFHWADDR)
if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
ll.Addr, _ = parseLinkAddr(lifr.Lifru[4:])
}
}
}
// Links returns a list of logical data links.
//
// The provided af must be an address family and name must be a data
// link name. The zero value of af or name means a wildcard.
func Links(af int, name string) ([]Link, error) {
eps, err := newEndpoints(af)
if len(eps) == 0 {
return nil, err
}
defer func() {
for _, ep := range eps {
ep.close()
}
}()
return links(eps, name)
}
func links(eps []endpoint, name string) ([]Link, error) {
var lls []Link
lifn := lifnum{Flags: sysLIFC_NOXMIT | sysLIFC_TEMPORARY | sysLIFC_ALLZONES | sysLIFC_UNDER_IPMP}
lifc := lifconf{Flags: sysLIFC_NOXMIT | sysLIFC_TEMPORARY | sysLIFC_ALLZONES | sysLIFC_UNDER_IPMP}
for _, ep := range eps {
lifn.Family = uint16(ep.af)
ioc := int64(syscall.SIOCGLIFNUM)
if err := ioctl(ep.s, uintptr(ioc), unsafe.Pointer(&lifn)); err != nil {
continue
}
if lifn.Count == 0 {
continue
}
b := make([]byte, lifn.Count*sizeofLifreq)
lifc.Family = uint16(ep.af)
lifc.Len = lifn.Count * sizeofLifreq
if len(lifc.Lifcu) == 8 {
nativeEndian.PutUint64(lifc.Lifcu[:], uint64(uintptr(unsafe.Pointer(&b[0]))))
} else {
nativeEndian.PutUint32(lifc.Lifcu[:], uint32(uintptr(unsafe.Pointer(&b[0]))))
}
ioc = int64(syscall.SIOCGLIFCONF)
if err := ioctl(ep.s, uintptr(ioc), unsafe.Pointer(&lifc)); err != nil {
continue
}
nb := make([]byte, 32) // see LIFNAMSIZ in net/if.h
for i := 0; i < int(lifn.Count); i++ {
lifr := (*lifreq)(unsafe.Pointer(&b[i*sizeofLifreq]))
for i := 0; i < 32; i++ {
if lifr.Name[i] == 0 {
nb = nb[:i]
break
}
nb[i] = byte(lifr.Name[i])
}
llname := string(nb)
nb = nb[:32]
if isDupLink(lls, llname) || name != "" && name != llname {
continue
}
ll := Link{Name: llname, Type: int(lifr.Type)}
ll.fetch(ep.s)
lls = append(lls, ll)
}
}
return lls, nil
}
func isDupLink(lls []Link, name string) bool {
for _, ll := range lls {
if ll.Name == name {
return true
}
}
return false
}
|
