/usr/share/gocode/src/code.google.com/p/go.net/ipv4/sockopt_linux.go is in golang-go.net-dev 0.0~hg20131201-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | // Copyright 2012 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.
package ipv4
import (
"net"
"os"
"syscall"
)
func ipv4ReceiveTOS(fd int) (bool, error) {
v, err := syscall.GetsockoptInt(fd, ianaProtocolIP, syscall.IP_RECVTOS)
if err != nil {
return false, os.NewSyscallError("getsockopt", err)
}
return v == 1, nil
}
func setIPv4ReceiveTOS(fd int, v bool) error {
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, ianaProtocolIP, syscall.IP_RECVTOS, boolint(v)))
}
func ipv4MulticastTTL(fd int) (int, error) {
v, err := syscall.GetsockoptInt(fd, ianaProtocolIP, syscall.IP_MULTICAST_TTL)
if err != nil {
return 0, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv4MulticastTTL(fd int, v int) error {
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, ianaProtocolIP, syscall.IP_MULTICAST_TTL, v))
}
func ipv4PacketInfo(fd int) (bool, error) {
v, err := syscall.GetsockoptInt(fd, ianaProtocolIP, syscall.IP_PKTINFO)
if err != nil {
return false, os.NewSyscallError("getsockopt", err)
}
return v == 1, nil
}
func setIPv4PacketInfo(fd int, v bool) error {
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, ianaProtocolIP, syscall.IP_PKTINFO, boolint(v)))
}
func ipv4MulticastInterface(fd int) (*net.Interface, error) {
mreqn, err := syscall.GetsockoptIPMreqn(fd, ianaProtocolIP, syscall.IP_MULTICAST_IF)
if err != nil {
return nil, os.NewSyscallError("getsockopt", err)
}
if int(mreqn.Ifindex) == 0 {
return nil, nil
}
return net.InterfaceByIndex(int(mreqn.Ifindex))
}
func setIPv4MulticastInterface(fd int, ifi *net.Interface) error {
mreqn := syscall.IPMreqn{}
if ifi != nil {
mreqn.Ifindex = int32(ifi.Index)
}
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreqn(fd, ianaProtocolIP, syscall.IP_MULTICAST_IF, &mreqn))
}
func ipv4MulticastLoopback(fd int) (bool, error) {
v, err := syscall.GetsockoptInt(fd, ianaProtocolIP, syscall.IP_MULTICAST_LOOP)
if err != nil {
return false, os.NewSyscallError("getsockopt", err)
}
return v == 1, nil
}
func setIPv4MulticastLoopback(fd int, v bool) error {
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, ianaProtocolIP, syscall.IP_MULTICAST_LOOP, boolint(v)))
}
func joinIPv4Group(fd int, ifi *net.Interface, grp net.IP) error {
mreqn := syscall.IPMreqn{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[3]}}
if ifi != nil {
mreqn.Ifindex = int32(ifi.Index)
}
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreqn(fd, ianaProtocolIP, syscall.IP_ADD_MEMBERSHIP, &mreqn))
}
func leaveIPv4Group(fd int, ifi *net.Interface, grp net.IP) error {
mreqn := syscall.IPMreqn{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[3]}}
if ifi != nil {
mreqn.Ifindex = int32(ifi.Index)
}
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreqn(fd, ianaProtocolIP, syscall.IP_DROP_MEMBERSHIP, &mreqn))
}
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