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
|
/* ebt_mark
*
* Authors:
* Bart De Schuymer <bdschuym@pandora.be>
*
* July, 2002, September 2006
*
* Adapted by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
* to use libxtables for ebtables-compat in 2015.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <xtables.h>
#include <linux/netfilter_bridge/ebt_mark_t.h>
#include "iptables/nft.h"
#include "iptables/nft-bridge.h"
static int mark_supplied;
#define MARK_TARGET '1'
#define MARK_SETMARK '2'
#define MARK_ORMARK '3'
#define MARK_ANDMARK '4'
#define MARK_XORMARK '5'
static struct option brmark_opts[] = {
{ .name = "mark-target",.has_arg = true, .val = MARK_TARGET },
/* an oldtime messup, we should have always used the scheme
* <extension-name>-<option> */
{ .name = "set-mark", .has_arg = true, .val = MARK_SETMARK },
{ .name = "mark-set", .has_arg = true, .val = MARK_SETMARK },
{ .name = "mark-or", .has_arg = true, .val = MARK_ORMARK },
{ .name = "mark-and", .has_arg = true, .val = MARK_ANDMARK },
{ .name = "mark-xor", .has_arg = true, .val = MARK_XORMARK },
XT_GETOPT_TABLEEND,
};
static void brmark_print_help(void)
{
printf(
"mark target options:\n"
" --mark-set value : Set nfmark value\n"
" --mark-or value : Or nfmark with value (nfmark |= value)\n"
" --mark-and value : And nfmark with value (nfmark &= value)\n"
" --mark-xor value : Xor nfmark with value (nfmark ^= value)\n"
" --mark-target target : ACCEPT, DROP, RETURN or CONTINUE\n");
}
static void brmark_init(struct xt_entry_target *target)
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
info->target = EBT_ACCEPT;
info->mark = 0;
mark_supplied = 0;
}
#define OPT_MARK_TARGET 0x01
#define OPT_MARK_SETMARK 0x02
#define OPT_MARK_ORMARK 0x04
#define OPT_MARK_ANDMARK 0x08
#define OPT_MARK_XORMARK 0x10
static int
brmark_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_target **target)
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)
(*target)->data;
char *end;
uint32_t mask;
switch (c) {
case MARK_TARGET:
{ unsigned int tmp;
EBT_CHECK_OPTION(flags, OPT_MARK_TARGET);
if (ebt_fill_target(optarg, &tmp))
xtables_error(PARAMETER_PROBLEM,
"Illegal --mark-target target");
/* the 4 lsb are left to designate the target */
info->target = (info->target & ~EBT_VERDICT_BITS) |
(tmp & EBT_VERDICT_BITS);
}
return 1;
case MARK_SETMARK:
EBT_CHECK_OPTION(flags, OPT_MARK_SETMARK);
mask = (OPT_MARK_ORMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK);
if (*flags & mask)
xtables_error(PARAMETER_PROBLEM,
"--mark-set cannot be used together with"
" specific --mark option");
info->target = (info->target & EBT_VERDICT_BITS) |
MARK_SET_VALUE;
break;
case MARK_ORMARK:
EBT_CHECK_OPTION(flags, OPT_MARK_ORMARK);
mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK);
if (*flags & mask)
xtables_error(PARAMETER_PROBLEM,
"--mark-or cannot be used together with"
" specific --mark option");
info->target = (info->target & EBT_VERDICT_BITS) |
MARK_OR_VALUE;
break;
case MARK_ANDMARK:
EBT_CHECK_OPTION(flags, OPT_MARK_ANDMARK);
mask = (OPT_MARK_SETMARK|OPT_MARK_ORMARK|OPT_MARK_XORMARK);
if (*flags & mask)
xtables_error(PARAMETER_PROBLEM,
"--mark-and cannot be used together with"
" specific --mark option");
info->target = (info->target & EBT_VERDICT_BITS) |
MARK_AND_VALUE;
break;
case MARK_XORMARK:
EBT_CHECK_OPTION(flags, OPT_MARK_XORMARK);
mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_ORMARK);
if (*flags & mask)
xtables_error(PARAMETER_PROBLEM,
"--mark-xor cannot be used together with"
" specific --mark option");
info->target = (info->target & EBT_VERDICT_BITS) |
MARK_XOR_VALUE;
break;
default:
return 0;
}
/* mutual code */
info->mark = strtoul(optarg, &end, 0);
if (*end != '\0' || end == optarg)
xtables_error(PARAMETER_PROBLEM, "Bad MARK value '%s'",
optarg);
mark_supplied = 1;
return 1;
}
static void brmark_print(const void *ip, const struct xt_entry_target *target,
int numeric)
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
int tmp;
tmp = info->target & ~EBT_VERDICT_BITS;
if (tmp == MARK_SET_VALUE)
printf("--mark-set");
else if (tmp == MARK_OR_VALUE)
printf("--mark-or");
else if (tmp == MARK_XOR_VALUE)
printf("--mark-xor");
else if (tmp == MARK_AND_VALUE)
printf("--mark-and");
else
xtables_error(PARAMETER_PROBLEM, "Unknown mark action");
printf(" 0x%lx", info->mark);
tmp = info->target | ~EBT_VERDICT_BITS;
printf(" --mark-target %s", ebt_target_name(tmp));
}
static void brmark_final_check(unsigned int flags)
{
if (mark_supplied == 0)
xtables_error(PARAMETER_PROBLEM, "No mark value supplied");
if (!flags)
xtables_error(PARAMETER_PROBLEM,
"You must specify some option");
}
static struct xtables_target brmark_target = {
.name = "mark",
.revision = 0,
.version = XTABLES_VERSION,
.family = NFPROTO_BRIDGE,
.size = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
.userspacesize = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
.help = brmark_print_help,
.init = brmark_init,
.parse = brmark_parse,
.final_check = brmark_final_check,
.print = brmark_print,
.extra_opts = brmark_opts,
};
void _init(void)
{
xtables_register_target(&brmark_target);
}
|
