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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/* Shared library add-on to iptables to add connmark matching support.
*
* (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
* by Henrik Nordstrom <hno@marasystems.com>
*
* Version 1.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <xtables.h>
#include <linux/netfilter/xt_connmark.h>
struct xt_connmark_info {
unsigned long mark, mask;
u_int8_t invert;
};
enum {
F_MARK = 1 << 0,
};
static void connmark_mt_help(void)
{
printf(
"connmark match options:\n"
"[!] --mark value[/mask] Match ctmark value with optional mask\n");
}
static const struct option connmark_mt_opts[] = {
{.name = "mark", .has_arg = true, .val = '1'},
{ .name = NULL }
};
static int
connmark_mt_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_connmark_mtinfo1 *info = (void *)(*match)->data;
unsigned int mark, mask = UINT32_MAX;
char *end;
switch (c) {
case '1': /* --mark */
xtables_param_act(XTF_ONLY_ONCE, "connmark", "--mark", *flags & F_MARK);
if (!xtables_strtoui(optarg, &end, &mark, 0, UINT32_MAX))
xtables_param_act(XTF_BAD_VALUE, "connmark", "--mark", optarg);
if (*end == '/')
if (!xtables_strtoui(end + 1, &end, &mask, 0, UINT32_MAX))
xtables_param_act(XTF_BAD_VALUE, "connmark", "--mark", optarg);
if (*end != '\0')
xtables_param_act(XTF_BAD_VALUE, "connmark", "--mark", optarg);
if (invert)
info->invert = true;
info->mark = mark;
info->mask = mask;
*flags |= F_MARK;
return true;
}
return false;
}
static int
connmark_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_connmark_info *markinfo = (struct xt_connmark_info *)(*match)->data;
switch (c) {
char *end;
case '1':
xtables_check_inverse(optarg, &invert, &optind, 0, argv);
markinfo->mark = strtoul(optarg, &end, 0);
markinfo->mask = 0xffffffffUL;
if (*end == '/')
markinfo->mask = strtoul(end+1, &end, 0);
if (*end != '\0' || end == optarg)
xtables_error(PARAMETER_PROBLEM, "Bad MARK value \"%s\"", optarg);
if (invert)
markinfo->invert = 1;
*flags = 1;
break;
default:
return 0;
}
return 1;
}
static void print_mark(unsigned int mark, unsigned int mask)
{
if (mask != 0xffffffffU)
printf("0x%x/0x%x ", mark, mask);
else
printf("0x%x ", mark);
}
static void connmark_mt_check(unsigned int flags)
{
if (flags == 0)
xtables_error(PARAMETER_PROBLEM,
"connmark: The --mark option is required");
}
static void
connmark_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_connmark_info *info = (const void *)match->data;
printf("CONNMARK match ");
if (info->invert)
printf("!");
print_mark(info->mark, info->mask);
}
static void
connmark_mt_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_connmark_mtinfo1 *info = (const void *)match->data;
printf("connmark match ");
if (info->invert)
printf("!");
print_mark(info->mark, info->mask);
}
static void connmark_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_connmark_info *info = (const void *)match->data;
if (info->invert)
printf("! ");
printf("--mark ");
print_mark(info->mark, info->mask);
}
static void
connmark_mt_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_connmark_mtinfo1 *info = (const void *)match->data;
if (info->invert)
printf("! ");
printf("--mark ");
print_mark(info->mark, info->mask);
}
static struct xtables_match connmark_mt_reg[] = {
{
.family = NFPROTO_UNSPEC,
.name = "connmark",
.revision = 0,
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_connmark_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_connmark_info)),
.help = connmark_mt_help,
.parse = connmark_parse,
.final_check = connmark_mt_check,
.print = connmark_print,
.save = connmark_save,
.extra_opts = connmark_mt_opts,
},
{
.version = XTABLES_VERSION,
.name = "connmark",
.revision = 1,
.family = NFPROTO_UNSPEC,
.size = XT_ALIGN(sizeof(struct xt_connmark_mtinfo1)),
.userspacesize = XT_ALIGN(sizeof(struct xt_connmark_mtinfo1)),
.help = connmark_mt_help,
.parse = connmark_mt_parse,
.final_check = connmark_mt_check,
.print = connmark_mt_print,
.save = connmark_mt_save,
.extra_opts = connmark_mt_opts,
},
};
void _init(void)
{
xtables_register_matches(connmark_mt_reg, ARRAY_SIZE(connmark_mt_reg));
}
|
