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
|
/*
* Shared library add-on to iptables to add tos match support
*
* Copyright © CC Computer Consultants GmbH, 2007
* Contact: Jan Engelhardt <jengelh@computergmbh.de>
*/
#include <getopt.h>
#include <netdb.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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_mt_opts[] = {
{.name = "tos", .has_arg = true, .val = 't'},
{ .name = NULL }
};
static void tos_mt_help(void)
{
const struct tos_symbol_info *symbol;
printf(
"tos match options:\n"
"[!] --tos value[/mask] Match Type of Service/Priority field value\n"
"[!] --tos symbol Match 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 int tos_mt_parse_v0(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct ipt_tos_info *info = (void *)(*match)->data;
struct tos_value_mask tvm;
switch (c) {
case 't':
param_act(P_ONLY_ONCE, "tos", "--tos", *flags & FLAG_TOS);
if (!tos_parse_symbolic(optarg, &tvm, 0xFF))
param_act(P_BAD_VALUE, "tos", "--tos", optarg);
if (tvm.mask != 0xFF)
exit_error(PARAMETER_PROBLEM, "tos: Your kernel is "
"too old to support anything besides /0xFF "
"as a mask.");
info->tos = tvm.value;
if (invert)
info->invert = true;
*flags |= FLAG_TOS;
return true;
}
return false;
}
static int tos_mt_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_tos_match_info *info = (void *)(*match)->data;
struct tos_value_mask tvm = {.mask = 0xFF};
switch (c) {
case 't':
param_act(P_ONLY_ONCE, "tos", "--tos", *flags & FLAG_TOS);
if (!tos_parse_symbolic(optarg, &tvm, 0x3F))
param_act(P_BAD_VALUE, "tos", "--tos", optarg);
info->tos_value = tvm.value;
info->tos_mask = tvm.mask;
if (invert)
info->invert = true;
*flags |= FLAG_TOS;
return true;
}
return false;
}
static void tos_mt_check(unsigned int flags)
{
if (flags == 0)
exit_error(PARAMETER_PROBLEM,
"tos: --tos parameter required");
}
static void tos_mt_print_v0(const void *ip, const struct xt_entry_match *match,
int numeric)
{
const struct ipt_tos_info *info = (const void *)match->data;
printf("tos match ");
if (info->invert)
printf("!");
if (numeric || !tos_try_print_symbolic("", info->tos, 0x3F))
printf("0x%02x ", info->tos);
}
static void tos_mt_print(const void *ip, const struct xt_entry_match *match,
int numeric)
{
const struct xt_tos_match_info *info = (const void *)match->data;
printf("tos match ");
if (info->invert)
printf("!");
if (numeric ||
!tos_try_print_symbolic("", info->tos_value, info->tos_mask))
printf("0x%02x/0x%02x ", info->tos_value, info->tos_mask);
}
static void tos_mt_save_v0(const void *ip, const struct xt_entry_match *match)
{
const struct ipt_tos_info *info = (const void *)match->data;
if (info->invert)
printf("! ");
printf("--tos 0x%02x ", info->tos);
}
static void tos_mt_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_tos_match_info *info = (const void *)match->data;
if (info->invert)
printf("! ");
printf("--tos 0x%02x/0x%02x ", info->tos_value, info->tos_mask);
}
static struct xtables_match tos_mt_reg_v0 = {
.version = IPTABLES_VERSION,
.name = "tos",
.family = AF_INET,
.revision = 0,
.size = XT_ALIGN(sizeof(struct ipt_tos_info)),
.userspacesize = XT_ALIGN(sizeof(struct ipt_tos_info)),
.help = tos_mt_help,
.parse = tos_mt_parse_v0,
.final_check = tos_mt_check,
.print = tos_mt_print_v0,
.save = tos_mt_save_v0,
.extra_opts = tos_mt_opts,
};
static struct xtables_match tos_mt_reg = {
.version = IPTABLES_VERSION,
.name = "tos",
.family = AF_INET,
.revision = 1,
.size = XT_ALIGN(sizeof(struct xt_tos_match_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_tos_match_info)),
.help = tos_mt_help,
.parse = tos_mt_parse,
.final_check = tos_mt_check,
.print = tos_mt_print,
.save = tos_mt_save,
.extra_opts = tos_mt_opts,
};
static struct xtables_match tos_mt6_reg = {
.version = IPTABLES_VERSION,
.name = "tos",
.family = AF_INET6,
.revision = 1,
.size = XT_ALIGN(sizeof(struct xt_tos_match_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_tos_match_info)),
.help = tos_mt_help,
.parse = tos_mt_parse,
.final_check = tos_mt_check,
.print = tos_mt_print,
.save = tos_mt_save,
.extra_opts = tos_mt_opts,
};
void _init(void)
{
xtables_register_match(&tos_mt_reg_v0);
xtables_register_match(&tos_mt_reg);
xtables_register_match(&tos_mt6_reg);
}
|
