npfkern.h revision 1.1 
1/*-
2 * Copyright (c) 2015 Mindaugas Rasiukevicius <rmind at netbsd org>
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 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#ifndef _NPFKERN_H_
28#define _NPFKERN_H_
29
30#ifndef _KERNEL
31#include <stdbool.h>
32#include <inttypes.h>
33#endif
34
35struct mbuf;
36struct ifnet;
37
38#if defined(_NPF_STANDALONE) || !defined(__NetBSD__)
39#define PFIL_IN		0x00000001	// incoming packet
40#define PFIL_OUT	0x00000002	// outgoing packet
41#endif
42
43#define	NPF_NO_GC	0x01
44
45typedef struct {
46	const char *	(*getname)(struct ifnet *);
47	struct ifnet *	(*lookup)(const char *);
48	void		(*flush)(void *);
49	void *		(*getmeta)(const struct ifnet *);
50	void		(*setmeta)(struct ifnet *, void *);
51} npf_ifops_t;
52
53typedef struct {
54	struct mbuf *	(*alloc)(int, int);
55	void		(*free)(struct mbuf *);
56	void *		(*getdata)(const struct mbuf *);
57	struct mbuf *	(*getnext)(struct mbuf *);
58	size_t		(*getlen)(const struct mbuf *);
59	size_t		(*getchainlen)(const struct mbuf *);
60	bool		(*ensure_contig)(struct mbuf **, size_t);
61	bool		(*ensure_writable)(struct mbuf **, size_t);
62} npf_mbufops_t;
63
64int	npf_sysinit(unsigned);
65void	npf_sysfini(void);
66
67npf_t *	npf_create(int, const npf_mbufops_t *, const npf_ifops_t *);
68int	npf_load(npf_t *, void *, npf_error_t *);
69void	npf_gc(npf_t *);
70void	npf_destroy(npf_t *);
71
72void	npf_thread_register(npf_t *);
73int	npf_packet_handler(npf_t *, struct mbuf **, struct ifnet *, int);
74void	npf_ifmap_attach(npf_t *, struct ifnet *);
75void	npf_ifmap_detach(npf_t *, struct ifnet *);
76void	npf_stats(npf_t *, uint64_t *);
77
78#endif
79