xref: /freebsd/sys/netpfil/ipfw/pmod/ip_fw_pmod.c (revision 6137b5f7b8c183ee8806d79b3f1d8e5e3ddb3df3)
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/param.h>
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/lock.h>
32 #include <sys/malloc.h>
33 #include <sys/module.h>
34 #include <sys/rwlock.h>
35 #include <sys/socket.h>
36 
37 #include <net/if.h>
38 #include <net/vnet.h>
39 
40 #include <netinet/in.h>
41 #include <netinet/ip_var.h>
42 #include <netinet/ip_fw.h>
43 
44 #include <netpfil/ipfw/ip_fw_private.h>
45 #include <netpfil/ipfw/pmod/pmod.h>
46 
47 static int
48 vnet_ipfw_pmod_init(const void *arg __unused)
49 {
50 	int error;
51 
52 	error = tcpmod_init(&V_layer3_chain, IS_DEFAULT_VNET(curvnet));
53 	return (error);
54 }
55 
56 static int
57 vnet_ipfw_pmod_uninit(const void *arg __unused)
58 {
59 
60 	tcpmod_uninit(&V_layer3_chain, IS_DEFAULT_VNET(curvnet));
61 	return (0);
62 }
63 
64 static int
65 ipfw_pmod_modevent(module_t mod, int type, void *unused)
66 {
67 
68 	switch (type) {
69 	case MOD_LOAD:
70 	case MOD_UNLOAD:
71 		break;
72 	default:
73 		return (EOPNOTSUPP);
74 	}
75 	return (0);
76 }
77 
78 static moduledata_t ipfw_pmod_mod = {
79 	"ipfw_pmod",
80 	ipfw_pmod_modevent,
81 	0
82 };
83 
84 /* Define startup order. */
85 #define	IPFW_PMOD_SI_SUB_FIREWALL	SI_SUB_PROTO_IFATTACHDOMAIN
86 #define	IPFW_PMOD_MODEVENT_ORDER	(SI_ORDER_ANY - 128) /* after ipfw */
87 #define	IPFW_PMOD_MODULE_ORDER		(IPFW_PMOD_MODEVENT_ORDER + 1)
88 #define	IPFW_PMOD_VNET_ORDER		(IPFW_PMOD_MODEVENT_ORDER + 2)
89 
90 DECLARE_MODULE(ipfw_pmod, ipfw_pmod_mod, IPFW_PMOD_SI_SUB_FIREWALL,
91     IPFW_PMOD_MODULE_ORDER);
92 MODULE_DEPEND(ipfw_pmod, ipfw, 3, 3, 3);
93 MODULE_VERSION(ipfw_pmod, 1);
94 
95 VNET_SYSINIT(vnet_ipfw_pmod_init, IPFW_PMOD_SI_SUB_FIREWALL,
96     IPFW_PMOD_VNET_ORDER, vnet_ipfw_pmod_init, NULL);
97 VNET_SYSUNINIT(vnet_ipfw_pmod_uninit, IPFW_PMOD_SI_SUB_FIREWALL,
98     IPFW_PMOD_VNET_ORDER, vnet_ipfw_pmod_uninit, NULL);
99