mirror of
https://github.com/etcd-io/etcd.git
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96 lines
3.1 KiB
Go
96 lines
3.1 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin freebsd netbsd openbsd
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package ipv4
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import (
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"net"
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"os"
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"syscall"
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)
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func ipv4MulticastTTL(fd int) (int, error) {
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v, err := syscall.GetsockoptByte(fd, ianaProtocolIP, syscall.IP_MULTICAST_TTL)
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if err != nil {
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return 0, os.NewSyscallError("getsockopt", err)
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}
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return int(v), nil
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}
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func setIPv4MulticastTTL(fd int, v int) error {
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return os.NewSyscallError("setsockopt", syscall.SetsockoptByte(fd, ianaProtocolIP, syscall.IP_MULTICAST_TTL, byte(v)))
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}
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func ipv4ReceiveDestinationAddress(fd int) (bool, error) {
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v, err := syscall.GetsockoptInt(fd, ianaProtocolIP, syscall.IP_RECVDSTADDR)
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if err != nil {
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return false, os.NewSyscallError("getsockopt", err)
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}
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return v == 1, nil
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}
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func setIPv4ReceiveDestinationAddress(fd int, v bool) error {
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return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, ianaProtocolIP, syscall.IP_RECVDSTADDR, boolint(v)))
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}
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func ipv4ReceiveInterface(fd int) (bool, error) {
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v, err := syscall.GetsockoptInt(fd, ianaProtocolIP, syscall.IP_RECVIF)
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if err != nil {
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return false, os.NewSyscallError("getsockopt", err)
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}
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return v == 1, nil
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}
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func setIPv4ReceiveInterface(fd int, v bool) error {
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return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, ianaProtocolIP, syscall.IP_RECVIF, boolint(v)))
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}
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func ipv4MulticastInterface(fd int) (*net.Interface, error) {
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v, err := syscall.GetsockoptInet4Addr(fd, ianaProtocolIP, syscall.IP_MULTICAST_IF)
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if err != nil {
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return nil, os.NewSyscallError("getsockopt", err)
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}
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return netIP4ToInterface(net.IPv4(v[0], v[1], v[2], v[3]))
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}
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func setIPv4MulticastInterface(fd int, ifi *net.Interface) error {
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ip, err := netInterfaceToIP4(ifi)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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var v [4]byte
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copy(v[:], ip.To4())
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return os.NewSyscallError("setsockopt", syscall.SetsockoptInet4Addr(fd, ianaProtocolIP, syscall.IP_MULTICAST_IF, v))
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}
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func ipv4MulticastLoopback(fd int) (bool, error) {
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v, err := syscall.GetsockoptByte(fd, ianaProtocolIP, syscall.IP_MULTICAST_LOOP)
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if err != nil {
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return false, os.NewSyscallError("getsockopt", err)
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}
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return v == 1, nil
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}
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func setIPv4MulticastLoopback(fd int, v bool) error {
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return os.NewSyscallError("setsockopt", syscall.SetsockoptByte(fd, ianaProtocolIP, syscall.IP_MULTICAST_LOOP, byte(boolint(v))))
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}
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func joinIPv4Group(fd int, ifi *net.Interface, grp net.IP) error {
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mreq := syscall.IPMreq{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[3]}}
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if err := setSyscallIPMreq(&mreq, ifi); err != nil {
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return err
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}
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return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd, ianaProtocolIP, syscall.IP_ADD_MEMBERSHIP, &mreq))
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}
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func leaveIPv4Group(fd int, ifi *net.Interface, grp net.IP) error {
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mreq := syscall.IPMreq{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[3]}}
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if err := setSyscallIPMreq(&mreq, ifi); err != nil {
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return err
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}
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return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd, ianaProtocolIP, syscall.IP_DROP_MEMBERSHIP, &mreq))
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}
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