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62 lines
1.5 KiB
62 lines
1.5 KiB
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin freebsd linux
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package ipv4
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import (
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"net"
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"os"
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"unsafe"
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"golang.org/x/net/internal/iana"
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)
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var freebsd32o64 bool
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func setsockoptGroupReq(fd, name int, ifi *net.Interface, grp net.IP) error {
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var gr sysGroupReq
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if ifi != nil {
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gr.Interface = uint32(ifi.Index)
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}
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gr.setGroup(grp)
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var p unsafe.Pointer
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var l sysSockoptLen
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if freebsd32o64 {
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var d [sysSizeofGroupReq + 4]byte
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s := (*[sysSizeofGroupReq]byte)(unsafe.Pointer(&gr))
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copy(d[:4], s[:4])
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copy(d[8:], s[4:])
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p = unsafe.Pointer(&d[0])
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l = sysSizeofGroupReq + 4
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} else {
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p = unsafe.Pointer(&gr)
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l = sysSizeofGroupReq
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}
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return os.NewSyscallError("setsockopt", setsockopt(fd, iana.ProtocolIP, name, p, l))
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}
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func setsockoptGroupSourceReq(fd, name int, ifi *net.Interface, grp, src net.IP) error {
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var gsr sysGroupSourceReq
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if ifi != nil {
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gsr.Interface = uint32(ifi.Index)
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}
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gsr.setSourceGroup(grp, src)
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var p unsafe.Pointer
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var l sysSockoptLen
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if freebsd32o64 {
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var d [sysSizeofGroupSourceReq + 4]byte
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s := (*[sysSizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))
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copy(d[:4], s[:4])
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copy(d[8:], s[4:])
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p = unsafe.Pointer(&d[0])
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l = sysSizeofGroupSourceReq + 4
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} else {
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p = unsafe.Pointer(&gsr)
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l = sysSizeofGroupSourceReq
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}
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return os.NewSyscallError("setsockopt", setsockopt(fd, iana.ProtocolIP, name, p, l))
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}
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