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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
/*
* Shared library add-on to iptables to add TOS target support
*
* Copyright © CC Computer Consultants GmbH, 2007
* Contact: Jan Engelhardt <jengelh@computergmbh.de>
*/
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <xtables.h>
#include <linux/netfilter/xt_DSCP.h>
#include <linux/netfilter_ipv4/ipt_TOS.h>
#include "tos_values.c"
enum {
FLAG_TOS = 1 << 0,
};
static const struct option tos_tg_opts_v0[] = {
{.name = "set-tos", .has_arg = true, .val = '='},
{ .name = NULL }
};
static const struct option tos_tg_opts[] = {
{.name = "set-tos", .has_arg = true, .val = '='},
{.name = "and-tos", .has_arg = true, .val = '&'},
{.name = "or-tos", .has_arg = true, .val = '|'},
{.name = "xor-tos", .has_arg = true, .val = '^'},
{ .name = NULL }
};
static void tos_tg_help_v0(void)
{
const struct tos_symbol_info *symbol;
printf(
"TOS target options:\n"
" --set-tos value Set Type of Service/Priority field to value\n"
" --set-tos symbol Set TOS field (IPv4 only) by symbol\n"
" Accepted symbolic names for value are:\n");
for (symbol = tos_symbol_names; symbol->name != NULL; ++symbol)
printf(" (0x%02x) %2u %s\n",
symbol->value, symbol->value, symbol->name);
printf("\n");
}
static void tos_tg_help(void)
{
const struct tos_symbol_info *symbol;
printf(
"TOS target v%s options:\n"
" --set-tos value[/mask] Set Type of Service/Priority field to value\n"
" (Zero out bits in mask and XOR value into TOS)\n"
" --set-tos symbol Set TOS field (IPv4 only) by symbol\n"
" (this zeroes the 4-bit Precedence part!)\n"
" Accepted symbolic names for value are:\n",
XTABLES_VERSION);
for (symbol = tos_symbol_names; symbol->name != NULL; ++symbol)
printf(" (0x%02x) %2u %s\n",
symbol->value, symbol->value, symbol->name);
printf(
"\n"
" --and-tos bits Binary AND the TOS value with bits\n"
" --or-tos bits Binary OR the TOS value with bits\n"
" --xor-tos bits Binary XOR the TOS value with bits\n"
);
}
static int tos_tg_parse_v0(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_target **target)
{
struct ipt_tos_target_info *info = (void *)(*target)->data;
struct tos_value_mask tvm;
switch (c) {
case '=':
xtables_param_act(XTF_ONLY_ONCE, "TOS", "--set-tos", *flags & FLAG_TOS);
xtables_param_act(XTF_NO_INVERT, "TOS", "--set-tos", invert);
if (!tos_parse_symbolic(optarg, &tvm, 0xFF))
xtables_param_act(XTF_BAD_VALUE, "TOS", "--set-tos", optarg);
if (tvm.mask != 0xFF)
xtables_error(PARAMETER_PROBLEM, "tos match: Your kernel "
"is too old to support anything besides "
"/0xFF as a mask.");
info->tos = tvm.value;
*flags |= FLAG_TOS;
return true;
}
return false;
}
static int tos_tg_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_target **target)
{
struct xt_tos_target_info *info = (void *)(*target)->data;
struct tos_value_mask tvm;
unsigned int bits;
switch (c) {
case '=': /* --set-tos */
xtables_param_act(XTF_ONLY_ONCE, "TOS", "--set-tos", *flags & FLAG_TOS);
xtables_param_act(XTF_NO_INVERT, "TOS", "--set-tos", invert);
if (!tos_parse_symbolic(optarg, &tvm, 0x3F))
xtables_param_act(XTF_BAD_VALUE, "TOS", "--set-tos", optarg);
info->tos_value = tvm.value;
info->tos_mask = tvm.mask;
break;
case '&': /* --and-tos */
xtables_param_act(XTF_ONLY_ONCE, "TOS", "--and-tos", *flags & FLAG_TOS);
xtables_param_act(XTF_NO_INVERT, "TOS", "--and-tos", invert);
if (!xtables_strtoui(optarg, NULL, &bits, 0, UINT8_MAX))
xtables_param_act(XTF_BAD_VALUE, "TOS", "--and-tos", optarg);
info->tos_value = 0;
info->tos_mask = ~bits;
break;
case '|': /* --or-tos */
xtables_param_act(XTF_ONLY_ONCE, "TOS", "--or-tos", *flags & FLAG_TOS);
xtables_param_act(XTF_NO_INVERT, "TOS", "--or-tos", invert);
if (!xtables_strtoui(optarg, NULL, &bits, 0, UINT8_MAX))
xtables_param_act(XTF_BAD_VALUE, "TOS", "--or-tos", optarg);
info->tos_value = bits;
info->tos_mask = bits;
break;
case '^': /* --xor-tos */
xtables_param_act(XTF_ONLY_ONCE, "TOS", "--xor-tos", *flags & FLAG_TOS);
xtables_param_act(XTF_NO_INVERT, "TOS", "--xor-tos", invert);
if (!xtables_strtoui(optarg, NULL, &bits, 0, UINT8_MAX))
xtables_param_act(XTF_BAD_VALUE, "TOS", "--xor-tos", optarg);
info->tos_value = bits;
info->tos_mask = 0;
break;
default:
return false;
}
*flags |= FLAG_TOS;
return true;
}
static void tos_tg_check(unsigned int flags)
{
if (flags == 0)
xtables_error(PARAMETER_PROBLEM,
"TOS: The --set-tos parameter is required");
}
static void tos_tg_print_v0(const void *ip,
const struct xt_entry_target *target, int numeric)
{
const struct ipt_tos_target_info *info = (const void *)target->data;
printf("TOS set ");
if (numeric || !tos_try_print_symbolic("", info->tos, 0xFF))
printf("0x%02x ", info->tos);
}
static void tos_tg_print(const void *ip, const struct xt_entry_target *target,
int numeric)
{
const struct xt_tos_target_info *info = (const void *)target->data;
if (numeric)
printf("TOS set 0x%02x/0x%02x ",
info->tos_value, info->tos_mask);
else if (tos_try_print_symbolic("TOS set ",
info->tos_value, info->tos_mask))
/* already printed by call */
return;
else if (info->tos_value == 0)
printf("TOS and 0x%02x ",
(unsigned int)(u_int8_t)~info->tos_mask);
else if (info->tos_value == info->tos_mask)
printf("TOS or 0x%02x ", info->tos_value);
else if (info->tos_mask == 0)
printf("TOS xor 0x%02x ", info->tos_value);
else
printf("TOS set 0x%02x/0x%02x ",
info->tos_value, info->tos_mask);
}
static void tos_tg_save_v0(const void *ip, const struct xt_entry_target *target)
{
const struct ipt_tos_target_info *info = (const void *)target->data;
printf("--set-tos 0x%02x ", info->tos);
}
static void tos_tg_save(const void *ip, const struct xt_entry_target *target)
{
const struct xt_tos_target_info *info = (const void *)target->data;
printf("--set-tos 0x%02x/0x%02x ", info->tos_value, info->tos_mask);
}
static struct xtables_target tos_tg_reg_v0 = {
.version = XTABLES_VERSION,
.name = "TOS",
.revision = 0,
.family = NFPROTO_IPV4,
.size = XT_ALIGN(sizeof(struct xt_tos_target_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_tos_target_info)),
.help = tos_tg_help_v0,
.parse = tos_tg_parse_v0,
.final_check = tos_tg_check,
.print = tos_tg_print_v0,
.save = tos_tg_save_v0,
.extra_opts = tos_tg_opts_v0,
};
static struct xtables_target tos_tg_reg = {
.version = XTABLES_VERSION,
.name = "TOS",
.revision = 1,
.family = NFPROTO_IPV4,
.size = XT_ALIGN(sizeof(struct xt_tos_target_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_tos_target_info)),
.help = tos_tg_help,
.parse = tos_tg_parse,
.final_check = tos_tg_check,
.print = tos_tg_print,
.save = tos_tg_save,
.extra_opts = tos_tg_opts,
};
static struct xtables_target tos_tg6_reg = {
.version = XTABLES_VERSION,
.name = "TOS",
.family = NFPROTO_IPV6,
.revision = 1,
.size = XT_ALIGN(sizeof(struct xt_tos_target_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_tos_target_info)),
.help = tos_tg_help,
.parse = tos_tg_parse,
.final_check = tos_tg_check,
.print = tos_tg_print,
.save = tos_tg_save,
.extra_opts = tos_tg_opts,
};
void _init(void)
{
xtables_register_target(&tos_tg_reg_v0);
xtables_register_target(&tos_tg_reg);
xtables_register_target(&tos_tg6_reg);
}
|
