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
|
// 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.
// IP-level socket options for Linux
package net
import (
"os"
"syscall"
)
func ipv4MulticastInterface(fd *netFD) (*Interface, error) {
fd.incref()
defer fd.decref()
mreq, err := syscall.GetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF)
if err != nil {
return nil, os.NewSyscallError("getsockopt", err)
}
if int(mreq.Ifindex) == 0 {
return nil, nil
}
return InterfaceByIndex(int(mreq.Ifindex))
}
func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
var v int32
if ifi != nil {
v = int32(ifi.Index)
}
mreq := &syscall.IPMreqn{Ifindex: v}
fd.incref()
defer fd.decref()
err := syscall.SetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, mreq)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv4MulticastTTL(fd *netFD) (int, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_TTL)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv4MulticastTTL(fd *netFD, v int) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_TTL, v)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv4MulticastLoopback(fd *netFD) (bool, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP)
if err != nil {
return false, os.NewSyscallError("getsockopt", err)
}
return v == 1, nil
}
func setIPv4MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v))
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv4ReceiveInterface(fd *netFD) (bool, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_PKTINFO)
if err != nil {
return false, os.NewSyscallError("getsockopt", err)
}
return v == 1, nil
}
func setIPv4ReceiveInterface(fd *netFD, v bool) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_PKTINFO, boolint(v))
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
func ipv6TrafficClass(fd *netFD) (int, error) {
fd.incref()
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv6TrafficClass(fd *netFD, v int) error {
fd.incref()
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, v)
if err != nil {
return os.NewSyscallError("setsockopt", err)
}
return nil
}
|
