pf_mtag.h revision 171173 
1/*	$FreeBSD: head/sys/contrib/pf/net/pf_mtag.h 171173 2007-07-03 12:46:08Z mlaier $	*/
2/*
3 * Copyright (c) 2001 Daniel Hartmeier
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 *    - Redistributions of source code must retain the above copyright
11 *      notice, this list of conditions and the following disclaimer.
12 *    - Redistributions in binary form must reproduce the above
13 *      copyright notice, this list of conditions and the following
14 *      disclaimer in the documentation and/or other materials provided
15 *      with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 *
30 */
31
32#ifndef _NET_PF_MTAG_H_
33#define _NET_PF_MTAG_H_
34
35#ifdef _KERNEL
36
37#define	PF_TAG_GENERATED		0x01
38#define	PF_TAG_FRAGCACHE		0x02
39#define	PF_TAG_TRANSLATE_LOCALHOST	0x04
40
41struct pf_mtag {
42	void		*hdr;		/* saved hdr pos in mbuf, for ECN */
43	u_int		 rtableid;	/* alternate routing table id */
44	u_int32_t	 qid;		/* queue id */
45	u_int16_t	 tag;		/* tag id */
46	u_int8_t	 flags;
47	u_int8_t	 routed;
48	sa_family_t	 af;		/* for ECN */
49};
50
51static __inline struct pf_mtag *pf_find_mtag(struct mbuf *);
52static __inline struct pf_mtag *pf_get_mtag(struct mbuf *);
53
54static __inline struct pf_mtag *
55pf_find_mtag(struct mbuf *m)
56{
57	struct m_tag	*mtag;
58
59	if ((mtag = m_tag_find(m, PACKET_TAG_PF, NULL)) == NULL)
60		return (NULL);
61
62	return ((struct pf_mtag *)(mtag + 1));
63}
64
65static __inline struct pf_mtag *
66pf_get_mtag(struct mbuf *m)
67{
68	struct m_tag	*mtag;
69
70	if ((mtag = m_tag_find(m, PACKET_TAG_PF, NULL)) == NULL) {
71		mtag = m_tag_get(PACKET_TAG_PF, sizeof(struct pf_mtag),
72		    M_NOWAIT);
73		if (mtag == NULL)
74			return (NULL);
75		bzero(mtag + 1, sizeof(struct pf_mtag));
76		m_tag_prepend(m, mtag);
77	}
78
79	return ((struct pf_mtag *)(mtag + 1));
80}
81#endif /* _KERNEL */
82#endif /* _NET_PF_MTAG_H_ */
83