1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* Copyright 1999 Guido van Rooij. All rights reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/conf.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ipl.h>
#include <netinet/ip_compat.h>
#include <netinet/ip_fil.h>
#include <netinet/ip_state.h>
#include <netinet/ip_nat.h>
#include <netinet/ip_auth.h>
#include <netinet/ip_frag.h>
static dev_t ipf_devs[IPL_LOGMAX + 1];
SYSCTL_DECL(_net_inet);
SYSCTL_NODE(_net_inet, OID_AUTO, ipf, CTLFLAG_RW, 0, "IPF");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_flags, CTLFLAG_RW, &fr_flags, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_pass, CTLFLAG_RW, &fr_pass, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RW,
&fr_tcpidletimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RW,
&fr_tcpclosewait, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RW,
&fr_tcplastack, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RW,
&fr_tcptimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RW,
&fr_tcpclosed, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RW,
&fr_udptimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RW,
&fr_icmptimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defnatage, CTLFLAG_RW,
&fr_defnatage, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_ipfrttl, CTLFLAG_RW,
&fr_ipfrttl, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_unreach, CTLFLAG_RW,
&ipl_unreach, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_running, CTLFLAG_RD,
&fr_running, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authsize, CTLFLAG_RD,
&fr_authsize, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authused, CTLFLAG_RD,
&fr_authused, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defaultauthage, CTLFLAG_RW,
&fr_defaultauthage, 0, "");
#define CDEV_MAJOR 79
static struct cdevsw ipl_cdevsw = {
/* open */ iplopen,
/* close */ iplclose,
/* read */ iplread,
/* write */ nowrite,
/* ioctl */ iplioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "ipl",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* bmaj */ -1
};
static int
ipfilter_modevent(module_t mod, int type, void *unused)
{
char *c;
int i, error = 0;
switch (type) {
case MOD_LOAD :
error = iplattach();
if (error)
break;
c = NULL;
for(i=strlen(IPL_NAME); i>0; i--)
if (IPL_NAME[i] == '/') {
c = &IPL_NAME[i+1];
break;
}
if (!c)
c = IPL_NAME;
ipf_devs[IPL_LOGIPF] =
make_dev(&ipl_cdevsw, IPL_LOGIPF, 0, 0, 0600, c);
c = NULL;
for(i=strlen(IPL_NAT); i>0; i--)
if (IPL_NAT[i] == '/') {
c = &IPL_NAT[i+1];
break;
}
if (!c)
c = IPL_NAT;
ipf_devs[IPL_LOGNAT] =
make_dev(&ipl_cdevsw, IPL_LOGNAT, 0, 0, 0600, c);
c = NULL;
for(i=strlen(IPL_STATE); i>0; i--)
if (IPL_STATE[i] == '/') {
c = &IPL_STATE[i+1];
break;
}
if (!c)
c = IPL_STATE;
ipf_devs[IPL_LOGSTATE] =
make_dev(&ipl_cdevsw, IPL_LOGSTATE, 0, 0, 0600, c);
c = NULL;
for(i=strlen(IPL_AUTH); i>0; i--)
if (IPL_AUTH[i] == '/') {
c = &IPL_AUTH[i+1];
break;
}
if (!c)
c = IPL_AUTH;
ipf_devs[IPL_LOGAUTH] =
make_dev(&ipl_cdevsw, IPL_LOGAUTH, 0, 0, 0600, c);
break;
case MOD_UNLOAD :
destroy_dev(ipf_devs[IPL_LOGIPF]);
destroy_dev(ipf_devs[IPL_LOGNAT]);
destroy_dev(ipf_devs[IPL_LOGSTATE]);
destroy_dev(ipf_devs[IPL_LOGAUTH]);
cdevsw_remove(&ipl_cdevsw);
error = ipldetach();
break;
default:
error = EINVAL;
break;
}
return error;
}
static moduledata_t ipfiltermod = {
"ipfilter",
ipfilter_modevent,
0
};
DECLARE_MODULE(ipfilter, ipfiltermod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
|
