FreeBSD kernel IPv4 code
ip_divert.h
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1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2003 Sam Leffler, Errno Consulting
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
15 * redistribution must be conditioned upon including a substantially
16 * similar Disclaimer requirement for further binary redistribution.
17 * 3. Neither the names of the above-listed copyright holders nor the names
18 * of any contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * NO WARRANTY
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
25 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
26 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
27 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
30 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGES.
33 *
34 * $FreeBSD$
35 */
36
37#ifndef _NETINET_IP_DIVERT_H_
38#define _NETINET_IP_DIVERT_H_
39
40/*
41 * divert has no custom kernel-userland API.
42 *
43 * All communication occurs through a sockaddr_in socket where
44 *
45 * kernel-->userland
46 * sin_port = matching rule, host format;
47 * sin_addr = IN: first address of the incoming interface;
48 * OUT: INADDR_ANY
49 * sin_zero = if fits, the interface name (max 7 bytes + NUL)
50 *
51 * userland->kernel
52 * sin_port = restart-rule - 1, host order
53 * (we restart at sin_port + 1)
54 * sin_addr = IN: address of the incoming interface;
55 * OUT: INADDR_ANY
56 */
57#endif /* _NETINET_IP_DIVERT_H_ */