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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// 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.
// +build darwin freebsd linux netbsd openbsd windows
// IP-level socket options
package net
import (
"os"
"syscall"
)
func ipv4TOS(fd *netFD) (int, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv4TOS(fd *netFD, v int) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS, v)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv4TTL(fd *netFD) (int, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv4TTL(fd *netFD, v int) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL, v)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}}
if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
return err
}
fd.incref()
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_ADD_MEMBERSHIP, mreq))
}
func leaveIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}}
if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
return err
}
fd.incref()
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_DROP_MEMBERSHIP, mreq))
}
func ipv6HopLimit(fd *netFD) (int, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv6HopLimit(fd *netFD, v int) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS, v)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv6MulticastInterface(fd *netFD) (*Interface, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF)
if err != nil {
return nil, os.NewSyscallError("getsockopt", err)
}
if v == 0 {
return nil, nil
}
ifi, err := InterfaceByIndex(v)
if err != nil {
return nil, err
}
return ifi, nil
}
func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
var v int
if ifi != nil {
v = ifi.Index
}
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, v)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv6MulticastHopLimit(fd *netFD) (int, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv6MulticastHopLimit(fd *netFD, v int) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS, v)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv6MulticastLoopback(fd *netFD) (bool, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP)
if err != nil {
return false, os.NewSyscallError("getsockopt", err)
}
return v == 1, nil
}
func setIPv6MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP, boolint(v))
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
mreq := &syscall.IPv6Mreq{}
copy(mreq.Multiaddr[:], ip)
if ifi != nil {
mreq.Interface = uint32(ifi.Index)
}
fd.incref()
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq))
}
func leaveIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
mreq := &syscall.IPv6Mreq{}
copy(mreq.Multiaddr[:], ip)
if ifi != nil {
mreq.Interface = uint32(ifi.Index)
}
fd.incref()
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_LEAVE_GROUP, mreq))
}
|
