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// Copyright 2014 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.
// +build darwin freebsd linux
package ipv4
import (
"net"
"os"
"unsafe"
"golang.org/x/net/internal/iana"
)
var freebsd32o64 bool
func setsockoptGroupReq(s uintptr, name int, ifi *net.Interface, grp net.IP) error {
var gr sysGroupReq
if ifi != nil {
gr.Interface = uint32(ifi.Index)
}
gr.setGroup(grp)
var p unsafe.Pointer
var l uint32
if freebsd32o64 {
var d [sysSizeofGroupReq + 4]byte
s := (*[sysSizeofGroupReq]byte)(unsafe.Pointer(&gr))
copy(d[:4], s[:4])
copy(d[8:], s[4:])
p = unsafe.Pointer(&d[0])
l = sysSizeofGroupReq + 4
} else {
p = unsafe.Pointer(&gr)
l = sysSizeofGroupReq
}
return os.NewSyscallError("setsockopt", setsockopt(s, iana.ProtocolIP, name, p, l))
}
func setsockoptGroupSourceReq(s uintptr, name int, ifi *net.Interface, grp, src net.IP) error {
var gsr sysGroupSourceReq
if ifi != nil {
gsr.Interface = uint32(ifi.Index)
}
gsr.setSourceGroup(grp, src)
var p unsafe.Pointer
var l uint32
if freebsd32o64 {
var d [sysSizeofGroupSourceReq + 4]byte
s := (*[sysSizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))
copy(d[:4], s[:4])
copy(d[8:], s[4:])
p = unsafe.Pointer(&d[0])
l = sysSizeofGroupSourceReq + 4
} else {
p = unsafe.Pointer(&gsr)
l = sysSizeofGroupSourceReq
}
return os.NewSyscallError("setsockopt", setsockopt(s, iana.ProtocolIP, name, p, l))
}
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