golang sockoptip_bsdvar 代码
文件路径：/src/net/sockoptip_bsdvar.go
// Copyright 2011 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.
//go:build aix || darwin || dragonfly || freebsd || netbsd || openbsd || solaris
package net
import (
"runtime"
"syscall"
)
func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
ip, err := interfaceToIPv4Addr(ifi)
if err != nil {
return wrapSyscallError("setsockopt", err)
}
var a [4]byte
copy(a[:], ip.To4())
err = fd.pfd.SetsockoptInet4Addr(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a)
runtime.KeepAlive(fd)
return wrapSyscallError("setsockopt", err)
}
func setIPv4MulticastLoopback(fd *netFD, v bool) error {
err := fd.pfd.SetsockoptByte(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))
runtime.KeepAlive(fd)
return wrapSyscallError("setsockopt", err)
}