1// Copyright 2017 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 linux
6
7package ipv4
8
9import (
10	"unsafe"
11
12	"golang.org/x/net/bpf"
13	"golang.org/x/net/internal/socket"
14	"golang.org/x/sys/unix"
15)
16
17func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error {
18	prog := unix.SockFprog{
19		Len:    uint16(len(f)),
20		Filter: (*unix.SockFilter)(unsafe.Pointer(&f[0])),
21	}
22	b := (*[unix.SizeofSockFprog]byte)(unsafe.Pointer(&prog))[:unix.SizeofSockFprog]
23	return so.Set(c, b)
24}
25