github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/net/ipv6/sockopt_asmreq_unix.go (about)

     1  // Copyright 2013 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  // +build darwin dragonfly freebsd linux netbsd openbsd
     6  
     7  package ipv6
     8  
     9  import (
    10  	"net"
    11  	"os"
    12  	"unsafe"
    13  )
    14  
    15  func setsockoptIPMreq(fd int, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
    16  	var mreq sysIPv6Mreq
    17  	copy(mreq.Multiaddr[:], grp)
    18  	if ifi != nil {
    19  		mreq.setIfindex(ifi.Index)
    20  	}
    21  	return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&mreq), sysSizeofIPv6Mreq))
    22  }