sockoptip6_posix.go

     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 unix || windows
     6  
     7  package net
     8  
     9  import (
    10  	"runtime"
    11  	"syscall"
    12  )
    13  
    14  func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
    15  	var v int
    16  	if ifi != nil {
    17  		v = ifi.Index
    18  	}
    19  	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, v)
    20  	runtime.KeepAlive(fd)
    21  	return wrapSyscallError("setsockopt", err)
    22  }
    23  
    24  func setIPv6MulticastLoopback(fd *netFD, v bool) error {
    25  	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP, boolint(v))
    26  	runtime.KeepAlive(fd)
    27  	return wrapSyscallError("setsockopt", err)
    28  }
    29  
    30  func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
    31  	mreq := &syscall.IPv6Mreq{}
    32  	copy(mreq.Multiaddr[:], ip)
    33  	if ifi != nil {
    34  		mreq.Interface = uint32(ifi.Index)
    35  	}
    36  	err := fd.pfd.SetsockoptIPv6Mreq(syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq)
    37  	runtime.KeepAlive(fd)
    38  	return wrapSyscallError("setsockopt", err)
    39  }
    40
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