LEFT | RIGHT |
(no file at all) | |
1 // Copyright 2011 The Go Authors. All rights reserved. | 1 // Copyright 2011 The Go Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style | 2 // Use of this source code is governed by a BSD-style |
3 // license that can be found in the LICENSE file. | 3 // license that can be found in the LICENSE file. |
4 | 4 |
5 // +build darwin freebsd linux netbsd openbsd windows | 5 // +build darwin freebsd linux netbsd openbsd windows |
6 | |
7 // IP-level socket options | |
8 | 6 |
9 package net | 7 package net |
10 | 8 |
11 import ( | 9 import ( |
12 "os" | 10 "os" |
13 "syscall" | 11 "syscall" |
14 ) | 12 ) |
15 | |
16 func ipv4TOS(fd *netFD) (int, error) { | |
17 if err := fd.incref(false); err != nil { | |
18 return 0, err | |
19 } | |
20 defer fd.decref() | |
21 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP
_TOS) | |
22 if err != nil { | |
23 return 0, os.NewSyscallError("getsockopt", err) | |
24 } | |
25 return v, nil | |
26 } | |
27 | |
28 func setIPv4TOS(fd *netFD, v int) error { | |
29 if err := fd.incref(false); err != nil { | |
30 return err | |
31 } | |
32 defer fd.decref() | |
33 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TO
S, v) | |
34 if err != nil { | |
35 return os.NewSyscallError("setsockopt", err) | |
36 } | |
37 return nil | |
38 } | |
39 | |
40 func ipv4TTL(fd *netFD) (int, error) { | |
41 if err := fd.incref(false); err != nil { | |
42 return 0, err | |
43 } | |
44 defer fd.decref() | |
45 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP
_TTL) | |
46 if err != nil { | |
47 return 0, os.NewSyscallError("getsockopt", err) | |
48 } | |
49 return v, nil | |
50 } | |
51 | |
52 func setIPv4TTL(fd *netFD, v int) error { | |
53 if err := fd.incref(false); err != nil { | |
54 return err | |
55 } | |
56 defer fd.decref() | |
57 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TT
L, v) | |
58 if err != nil { | |
59 return os.NewSyscallError("setsockopt", err) | |
60 } | |
61 return nil | |
62 } | |
63 | 13 |
64 func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error { | 14 func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error { |
65 mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}} | 15 mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}} |
66 if err := setIPv4MreqToInterface(mreq, ifi); err != nil { | 16 if err := setIPv4MreqToInterface(mreq, ifi); err != nil { |
67 return err | 17 return err |
68 } | 18 } |
69 if err := fd.incref(false); err != nil { | 19 if err := fd.incref(false); err != nil { |
70 return err | 20 return err |
71 } | 21 } |
72 defer fd.decref() | 22 defer fd.decref() |
73 » return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysf
d, syscall.IPPROTO_IP, syscall.IP_ADD_MEMBERSHIP, mreq)) | 23 » err := syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP
_ADD_MEMBERSHIP, mreq) |
74 } | |
75 | |
76 func leaveIPv4Group(fd *netFD, ifi *Interface, ip IP) error { | |
77 » mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}} | |
78 » if err := setIPv4MreqToInterface(mreq, ifi); err != nil { | |
79 » » return err | |
80 » } | |
81 » if err := fd.incref(false); err != nil { | |
82 » » return err | |
83 » } | |
84 » defer fd.decref() | |
85 » return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysf
d, syscall.IPPROTO_IP, syscall.IP_DROP_MEMBERSHIP, mreq)) | |
86 } | |
87 | |
88 func ipv6HopLimit(fd *netFD) (int, error) { | |
89 » if err := fd.incref(false); err != nil { | |
90 » » return 0, err | |
91 » } | |
92 » defer fd.decref() | |
93 » v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.
IPV6_UNICAST_HOPS) | |
94 » if err != nil { | |
95 » » return 0, os.NewSyscallError("getsockopt", err) | |
96 » } | |
97 » return v, nil | |
98 } | |
99 | |
100 func setIPv6HopLimit(fd *netFD, v int) error { | |
101 » if err := fd.incref(false); err != nil { | |
102 » » return err | |
103 » } | |
104 » defer fd.decref() | |
105 » err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV
6_UNICAST_HOPS, v) | |
106 if err != nil { | 24 if err != nil { |
107 return os.NewSyscallError("setsockopt", err) | 25 return os.NewSyscallError("setsockopt", err) |
108 } | 26 } |
109 return nil | 27 return nil |
110 } | |
111 | |
112 func ipv6MulticastInterface(fd *netFD) (*Interface, error) { | |
113 if err := fd.incref(false); err != nil { | |
114 return nil, err | |
115 } | |
116 defer fd.decref() | |
117 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.
IPV6_MULTICAST_IF) | |
118 if err != nil { | |
119 return nil, os.NewSyscallError("getsockopt", err) | |
120 } | |
121 if v == 0 { | |
122 return nil, nil | |
123 } | |
124 ifi, err := InterfaceByIndex(v) | |
125 if err != nil { | |
126 return nil, err | |
127 } | |
128 return ifi, nil | |
129 } | 28 } |
130 | 29 |
131 func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error { | 30 func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error { |
132 var v int | 31 var v int |
133 if ifi != nil { | 32 if ifi != nil { |
134 v = ifi.Index | 33 v = ifi.Index |
135 } | 34 } |
136 if err := fd.incref(false); err != nil { | 35 if err := fd.incref(false); err != nil { |
137 return err | 36 return err |
138 } | 37 } |
139 defer fd.decref() | 38 defer fd.decref() |
140 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV
6_MULTICAST_IF, v) | 39 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV
6_MULTICAST_IF, v) |
141 if err != nil { | 40 if err != nil { |
142 return os.NewSyscallError("setsockopt", err) | 41 return os.NewSyscallError("setsockopt", err) |
143 } | 42 } |
144 return nil | 43 return nil |
145 } | |
146 | |
147 func ipv6MulticastHopLimit(fd *netFD) (int, error) { | |
148 if err := fd.incref(false); err != nil { | |
149 return 0, err | |
150 } | |
151 defer fd.decref() | |
152 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.
IPV6_MULTICAST_HOPS) | |
153 if err != nil { | |
154 return 0, os.NewSyscallError("getsockopt", err) | |
155 } | |
156 return v, nil | |
157 } | |
158 | |
159 func setIPv6MulticastHopLimit(fd *netFD, v int) error { | |
160 if err := fd.incref(false); err != nil { | |
161 return err | |
162 } | |
163 defer fd.decref() | |
164 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV
6_MULTICAST_HOPS, v) | |
165 if err != nil { | |
166 return os.NewSyscallError("setsockopt", err) | |
167 } | |
168 return nil | |
169 } | |
170 | |
171 func ipv6MulticastLoopback(fd *netFD) (bool, error) { | |
172 if err := fd.incref(false); err != nil { | |
173 return false, err | |
174 } | |
175 defer fd.decref() | |
176 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.
IPV6_MULTICAST_LOOP) | |
177 if err != nil { | |
178 return false, os.NewSyscallError("getsockopt", err) | |
179 } | |
180 return v == 1, nil | |
181 } | 44 } |
182 | 45 |
183 func setIPv6MulticastLoopback(fd *netFD, v bool) error { | 46 func setIPv6MulticastLoopback(fd *netFD, v bool) error { |
184 if err := fd.incref(false); err != nil { | 47 if err := fd.incref(false); err != nil { |
185 return err | 48 return err |
186 } | 49 } |
187 defer fd.decref() | 50 defer fd.decref() |
188 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV
6_MULTICAST_LOOP, boolint(v)) | 51 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV
6_MULTICAST_LOOP, boolint(v)) |
189 if err != nil { | 52 if err != nil { |
190 return os.NewSyscallError("setsockopt", err) | 53 return os.NewSyscallError("setsockopt", err) |
191 } | 54 } |
192 return nil | 55 return nil |
193 } | 56 } |
194 | 57 |
195 func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error { | 58 func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error { |
196 mreq := &syscall.IPv6Mreq{} | 59 mreq := &syscall.IPv6Mreq{} |
197 copy(mreq.Multiaddr[:], ip) | 60 copy(mreq.Multiaddr[:], ip) |
198 if ifi != nil { | 61 if ifi != nil { |
199 mreq.Interface = uint32(ifi.Index) | 62 mreq.Interface = uint32(ifi.Index) |
200 } | 63 } |
201 if err := fd.incref(false); err != nil { | 64 if err := fd.incref(false); err != nil { |
202 return err | 65 return err |
203 } | 66 } |
204 defer fd.decref() | 67 defer fd.decref() |
205 » return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sy
sfd, syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq)) | 68 » err := syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscal
l.IPV6_JOIN_GROUP, mreq) |
| 69 » if err != nil { |
| 70 » » return os.NewSyscallError("setsockopt", err) |
| 71 » } |
| 72 » return nil |
206 } | 73 } |
207 | |
208 func leaveIPv6Group(fd *netFD, ifi *Interface, ip IP) error { | |
209 mreq := &syscall.IPv6Mreq{} | |
210 copy(mreq.Multiaddr[:], ip) | |
211 if ifi != nil { | |
212 mreq.Interface = uint32(ifi.Index) | |
213 } | |
214 if err := fd.incref(false); err != nil { | |
215 return err | |
216 } | |
217 defer fd.decref() | |
218 return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sy
sfd, syscall.IPPROTO_IPV6, syscall.IPV6_LEAVE_GROUP, mreq)) | |
219 } | |
LEFT | RIGHT |