ip_divert.h revision 196502 
1/*-
2 * Copyright (c) 2003 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 *    redistribution must be conditioned upon including a substantially
14 *    similar Disclaimer requirement for further binary redistribution.
15 * 3. Neither the names of the above-listed copyright holders nor the names
16 *    of any contributors may be used to endorse or promote products derived
17 *    from this software without specific prior written permission.
18 *
19 * NO WARRANTY
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
23 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
24 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
25 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
28 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGES.
31 *
32 * $FreeBSD: head/sys/netinet/ip_divert.h 196502 2009-08-24 10:06:02Z zec $
33 */
34
35#ifndef _NETINET_IP_DIVERT_H_
36#define	_NETINET_IP_DIVERT_H_
37
38/*
39 * Sysctl declaration.
40 */
41#ifdef SYSCTL_DECL
42SYSCTL_DECL(_net_inet_divert);
43#endif
44
45/*
46 * Divert socket definitions.
47 */
48struct divert_tag {
49	u_int32_t	info;		/* port & flags */
50	u_int16_t	cookie;		/* ipfw rule number */
51};
52
53/*
54 * Return the divert cookie associated with the mbuf; if any.
55 */
56static __inline u_int16_t
57divert_cookie(struct m_tag *mtag)
58{
59	return ((struct divert_tag *)(mtag+1))->cookie;
60}
61static __inline u_int16_t
62divert_find_cookie(struct mbuf *m)
63{
64	struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL);
65	return mtag ? divert_cookie(mtag) : 0;
66}
67
68/*
69 * Return the divert info associated with the mbuf; if any.
70 */
71static __inline u_int32_t
72divert_info(struct m_tag *mtag)
73{
74	return ((struct divert_tag *)(mtag+1))->info;
75}
76static __inline u_int32_t
77divert_find_info(struct mbuf *m)
78{
79	struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL);
80	return mtag ? divert_info(mtag) : 0;
81}
82
83typedef	void ip_divert_packet_t(struct mbuf *m, int incoming);
84extern	ip_divert_packet_t *ip_divert_ptr;
85
86extern	void div_input(struct mbuf *, int);
87extern	void div_ctlinput(int, struct sockaddr *, void *);
88#endif /* _NETINET_IP_DIVERT_H_ */
89