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
|
/* Shared library add-on to iptables to add NFMARK matching support. */
#include <stdbool.h>
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <xtables.h>
#include <linux/netfilter/xt_mark.h>
struct xt_mark_info {
unsigned long mark, mask;
uint8_t invert;
};
enum {
F_MARK = 1 << 0,
};
static void mark_mt_help(void)
{
printf(
"mark match options:\n"
"[!] --mark value[/mask] Match nfmark value with optional mask\n");
}
static const struct option mark_mt_opts[] = {
{.name = "mark", .has_arg = true, .val = '1'},
XT_GETOPT_TABLEEND,
};
static int mark_mt_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_mark_mtinfo1 *info = (void *)(*match)->data;
unsigned int mark, mask = UINT32_MAX;
char *end;
switch (c) {
case '1': /* --mark */
xtables_param_act(XTF_ONLY_ONCE, "mark", "--mark", *flags & F_MARK);
if (!xtables_strtoui(optarg, &end, &mark, 0, UINT32_MAX))
xtables_param_act(XTF_BAD_VALUE, "mark", "--mark", optarg);
if (*end == '/')
if (!xtables_strtoui(end + 1, &end, &mask, 0, UINT32_MAX))
xtables_param_act(XTF_BAD_VALUE, "mark", "--mark", optarg);
if (*end != '\0')
xtables_param_act(XTF_BAD_VALUE, "mark", "--mark", optarg);
if (invert)
info->invert = true;
info->mark = mark;
info->mask = mask;
*flags |= F_MARK;
return true;
}
return false;
}
static int
mark_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_mark_info *markinfo = (struct xt_mark_info *)(*match)->data;
switch (c) {
char *end;
case '1':
xtables_check_inverse(optarg, &invert, &optind, 0, argv);
markinfo->mark = strtoul(optarg, &end, 0);
if (*end == '/') {
markinfo->mask = strtoul(end+1, &end, 0);
} else
markinfo->mask = 0xffffffff;
if (*end != '\0' || end == optarg)
xtables_error(PARAMETER_PROBLEM, "Bad MARK value \"%s\"", optarg);
if (invert)
markinfo->invert = 1;
*flags = 1;
break;
}
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 mark_mt_check(unsigned int flags)
{
if (flags == 0)
xtables_error(PARAMETER_PROBLEM,
"mark match: The --mark option is required");
}
static void
mark_mt_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_mark_mtinfo1 *info = (const void *)match->data;
printf(" mark match");
if (info->invert)
printf(" !");
print_mark(info->mark, info->mask);
}
static void
mark_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_mark_info *info = (const void *)match->data;
printf(" MARK match");
if (info->invert)
printf(" !");
print_mark(info->mark, info->mask);
}
static void mark_mt_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_mark_mtinfo1 *info = (const void *)match->data;
if (info->invert)
printf(" !");
printf(" --mark");
print_mark(info->mark, info->mask);
}
static void
mark_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_mark_info *info = (const void *)match->data;
if (info->invert)
printf(" !");
printf(" --mark");
print_mark(info->mark, info->mask);
}
static struct xtables_match mark_mt_reg[] = {
{
.family = NFPROTO_UNSPEC,
.name = "mark",
.revision = 0,
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_mark_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_info)),
.help = mark_mt_help,
.parse = mark_parse,
.final_check = mark_mt_check,
.print = mark_print,
.save = mark_save,
.extra_opts = mark_mt_opts,
},
{
.version = XTABLES_VERSION,
.name = "mark",
.revision = 1,
.family = NFPROTO_UNSPEC,
.size = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
.help = mark_mt_help,
.parse = mark_mt_parse,
.final_check = mark_mt_check,
.print = mark_mt_print,
.save = mark_mt_save,
.extra_opts = mark_mt_opts,
},
};
void _init(void)
{
xtables_register_matches(mark_mt_reg, ARRAY_SIZE(mark_mt_reg));
}
|
