1 // Copyright 2011 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 // +build darwin freebsd linux netbsd openbsd windows
7 // IP-level socket options
16 func ipv4TOS(fd *netFD) (int, error) {
17 if err := fd.incref(false); err != nil {
21 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS)
23 return 0, os.NewSyscallError("getsockopt", err)
28 func setIPv4TOS(fd *netFD, v int) error {
29 if err := fd.incref(false); err != nil {
33 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS, v)
35 return os.NewSyscallError("setsockopt", err)
40 func ipv4TTL(fd *netFD) (int, error) {
41 if err := fd.incref(false); err != nil {
45 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL)
47 return 0, os.NewSyscallError("getsockopt", err)
52 func setIPv4TTL(fd *netFD, v int) error {
53 if err := fd.incref(false); err != nil {
57 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL, v)
59 return os.NewSyscallError("setsockopt", err)
64 func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
65 mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}}
66 if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
69 if err := fd.incref(false); err != nil {
73 return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_ADD_MEMBERSHIP, mreq))
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 {
81 if err := fd.incref(false); err != nil {
85 return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_DROP_MEMBERSHIP, mreq))
88 func ipv6HopLimit(fd *netFD) (int, error) {
89 if err := fd.incref(false); err != nil {
93 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS)
95 return 0, os.NewSyscallError("getsockopt", err)
100 func setIPv6HopLimit(fd *netFD, v int) error {
101 if err := fd.incref(false); err != nil {
105 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS, v)
107 return os.NewSyscallError("setsockopt", err)
112 func ipv6MulticastInterface(fd *netFD) (*Interface, error) {
113 if err := fd.incref(false); err != nil {
117 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF)
119 return nil, os.NewSyscallError("getsockopt", err)
124 ifi, err := InterfaceByIndex(v)
131 func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
136 if err := fd.incref(false); err != nil {
140 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, v)
142 return os.NewSyscallError("setsockopt", err)
147 func ipv6MulticastHopLimit(fd *netFD) (int, error) {
148 if err := fd.incref(false); err != nil {
152 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS)
154 return 0, os.NewSyscallError("getsockopt", err)
159 func setIPv6MulticastHopLimit(fd *netFD, v int) error {
160 if err := fd.incref(false); err != nil {
164 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS, v)
166 return os.NewSyscallError("setsockopt", err)
171 func ipv6MulticastLoopback(fd *netFD) (bool, error) {
172 if err := fd.incref(false); err != nil {
176 v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP)
178 return false, os.NewSyscallError("getsockopt", err)
183 func setIPv6MulticastLoopback(fd *netFD, v bool) error {
184 if err := fd.incref(false); err != nil {
188 err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP, boolint(v))
190 return os.NewSyscallError("setsockopt", err)
195 func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
196 mreq := &syscall.IPv6Mreq{}
197 copy(mreq.Multiaddr[:], ip)
199 mreq.Interface = uint32(ifi.Index)
201 if err := fd.incref(false); err != nil {
205 return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq))
208 func leaveIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
209 mreq := &syscall.IPv6Mreq{}
210 copy(mreq.Multiaddr[:], ip)
212 mreq.Interface = uint32(ifi.Index)
214 if err := fd.incref(false); err != nil {
218 return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_LEAVE_GROUP, mreq))