91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
// Copyright 2011 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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// IP-level socket options for OpenBSD
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package net
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import (
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"os"
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"syscall"
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)
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func ipv4MulticastInterface(fd *netFD) (*Interface, error) {
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if err := fd.incref(false); err != nil {
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return nil, err
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}
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defer fd.decref()
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a, err := syscall.GetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, 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 ipv4AddrToInterface(IPv4(a[0], a[1], a[2], a[3]))
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}
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func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
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ip, err := interfaceToIPv4Addr(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 x [4]byte
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copy(x[:], ip.To4())
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if err := fd.incref(false); err != nil {
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return err
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}
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defer fd.decref()
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err = syscall.SetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, x)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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func ipv4MulticastLoopback(fd *netFD) (bool, error) {
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if err := fd.incref(false); err != nil {
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return false, err
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}
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defer fd.decref()
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v, err := syscall.GetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, 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 *netFD, v bool) error {
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if err := fd.incref(false); err != nil {
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return err
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}
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defer fd.decref()
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err := syscall.SetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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func ipv4ReceiveInterface(fd *netFD) (bool, error) {
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if err := fd.incref(false); err != nil {
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return false, err
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}
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defer fd.decref()
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v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, 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 *netFD, v bool) error {
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if err := fd.incref(false); err != nil {
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return err
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}
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defer fd.decref()
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err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_RECVIF, boolint(v))
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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