1/*
2 * Copyright (c) 1999-2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29/*
30 * Support for socket filter kernel extensions
31 */
32
33#ifndef NET_KEXT_NET_H
34#define NET_KEXT_NET_H
35
36#include <sys/appleapiopts.h>
37
38#include <sys/queue.h>
39#include <sys/cdefs.h>
40#include <sys/types.h>
41
42
43#define NFF_BEFORE 0x01
44#define NFF_AFTER 0x02
45
46#define NKE_OK 0
47#define NKE_REMOVE (-1)
48
49/*
50 * Interface structure for inserting an installed socket NKE into an
51 * existing socket.
52 * 'handle' is the NKE to be inserted, 'where' is an insertion point,
53 * and flags dictate the position of the to-be-inserted NKE relative to
54 * the 'where' NKE. If the latter is NULL, the flags indicate "first"
55 * or "last"
56 */
57#pragma pack(4)
58
59struct so_nke {
60 unsigned int nke_handle;
61 unsigned int nke_where;
62 int nke_flags; /* NFF_BEFORE, NFF_AFTER: net/kext_net.h */
63 u_int32_t reserved[4]; /* for future use */
64};
65
66#pragma pack()
67#endif /* NET_KEXT_NET_H */