sockoptip_bsdvar.go

Documentation: net

     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.
     4  
     5  //go:build aix || darwin || dragonfly || freebsd || netbsd || openbsd || solaris
     6  // +build aix darwin dragonfly freebsd netbsd openbsd solaris
     7  
     8  package net
     9  
    10  import (
    11  	"runtime"
    12  	"syscall"
    13  )
    14  
    15  func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
    16  	ip, err := interfaceToIPv4Addr(ifi)
    17  	if err != nil {
    18  		return wrapSyscallError("setsockopt", err)
    19  	}
    20  	var a [4]byte
    21  	copy(a[:], ip.To4())
    22  	err = fd.pfd.SetsockoptInet4Addr(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a)
    23  	runtime.KeepAlive(fd)
    24  	return wrapSyscallError("setsockopt", err)
    25  }
    26  
    27  func setIPv4MulticastLoopback(fd *netFD, v bool) error {
    28  	err := fd.pfd.SetsockoptByte(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))
    29  	runtime.KeepAlive(fd)
    30  	return wrapSyscallError("setsockopt", err)
    31  }
    32
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