1/*-
2 * Copyright (c) 2017 Yandex LLC
3 * Copyright (c) 2017 Andrey V. Elsukov <ae@FreeBSD.org>
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 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/lock.h>
35#include <sys/malloc.h>
36#include <sys/module.h>
37#include <sys/rwlock.h>
38#include <sys/socket.h>
39
40#include <net/if.h>
41#include <net/vnet.h>
42
43#include <netinet/in.h>
44#include <netinet/ip_var.h>
45#include <netinet/ip_fw.h>
46
47#include <netpfil/ipfw/ip_fw_private.h>
48#include <netpfil/ipfw/pmod/pmod.h>
49
50static int
51vnet_ipfw_pmod_init(const void *arg __unused)
52{
53	int error;
54
55	error = tcpmod_init(&V_layer3_chain, IS_DEFAULT_VNET(curvnet));
56	return (error);
57}
58
59static int
60vnet_ipfw_pmod_uninit(const void *arg __unused)
61{
62
63	tcpmod_uninit(&V_layer3_chain, IS_DEFAULT_VNET(curvnet));
64	return (0);
65}
66
67static int
68ipfw_pmod_modevent(module_t mod, int type, void *unused)
69{
70
71	switch (type) {
72	case MOD_LOAD:
73	case MOD_UNLOAD:
74		break;
75	default:
76		return (EOPNOTSUPP);
77	}
78	return (0);
79}
80
81static moduledata_t ipfw_pmod_mod = {
82	"ipfw_pmod",
83	ipfw_pmod_modevent,
84	0
85};
86
87/* Define startup order. */
88#define	IPFW_PMOD_SI_SUB_FIREWALL	SI_SUB_PROTO_IFATTACHDOMAIN
89#define	IPFW_PMOD_MODEVENT_ORDER	(SI_ORDER_ANY - 128) /* after ipfw */
90#define	IPFW_PMOD_MODULE_ORDER		(IPFW_PMOD_MODEVENT_ORDER + 1)
91#define	IPFW_PMOD_VNET_ORDER		(IPFW_PMOD_MODEVENT_ORDER + 2)
92
93DECLARE_MODULE(ipfw_pmod, ipfw_pmod_mod, IPFW_PMOD_SI_SUB_FIREWALL,
94    IPFW_PMOD_MODULE_ORDER);
95MODULE_DEPEND(ipfw_pmod, ipfw, 3, 3, 3);
96MODULE_VERSION(ipfw_pmod, 1);
97
98VNET_SYSINIT(vnet_ipfw_pmod_init, IPFW_PMOD_SI_SUB_FIREWALL,
99    IPFW_PMOD_VNET_ORDER, vnet_ipfw_pmod_init, NULL);
100VNET_SYSUNINIT(vnet_ipfw_pmod_uninit, IPFW_PMOD_SI_SUB_FIREWALL,
101    IPFW_PMOD_VNET_ORDER, vnet_ipfw_pmod_uninit, NULL);
102