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
|
/*
* 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 "tos_values.c"
struct ipt_tos_info {
uint8_t tos;
uint8_t invert;
};
enum {
O_TOS = 1 << 0,
};
static const struct xt_option_entry tos_mt_opts_v0[] = {
{.name = "tos", .id = O_TOS, .type = XTTYPE_TOSMASK,
.flags = XTOPT_INVERT | XTOPT_MAND, .max = 0xFF},
XTOPT_TABLEEND,
};
static const struct xt_option_entry tos_mt_opts[] = {
{.name = "tos", .id = O_TOS, .type = XTTYPE_TOSMASK,
.flags = XTOPT_INVERT | XTOPT_MAND, .max = 0x3F},
XTOPT_TABLEEND,
};
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 void tos_mt_parse_v0(struct xt_option_call *cb)
{
struct ipt_tos_info *info = cb->data;
xtables_option_parse(cb);
if (cb->val.tos_mask != 0xFF)
xtables_error(PARAMETER_PROBLEM, "tos: Your kernel is "
"too old to support anything besides /0xFF "
"as a mask.");
info->tos = cb->val.tos_value;
if (cb->invert)
info->invert = true;
}
static void tos_mt_parse(struct xt_option_call *cb)
{
struct xt_tos_match_info *info = cb->data;
xtables_option_parse(cb);
info->tos_value = cb->val.tos_value;
info->tos_mask = cb->val.tos_mask;
if (cb->invert)
info->invert = true;
}
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[] = {
{
.version = XTABLES_VERSION,
.name = "tos",
.family = NFPROTO_IPV4,
.revision = 0,
.size = XT_ALIGN(sizeof(struct ipt_tos_info)),
.userspacesize = XT_ALIGN(sizeof(struct ipt_tos_info)),
.help = tos_mt_help,
.print = tos_mt_print_v0,
.save = tos_mt_save_v0,
.x6_parse = tos_mt_parse_v0,
.x6_options = tos_mt_opts_v0,
},
{
.version = XTABLES_VERSION,
.name = "tos",
.family = NFPROTO_UNSPEC,
.revision = 1,
.size = XT_ALIGN(sizeof(struct xt_tos_match_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_tos_match_info)),
.help = tos_mt_help,
.print = tos_mt_print,
.save = tos_mt_save,
.x6_parse = tos_mt_parse,
.x6_options = tos_mt_opts,
},
};
void _init(void)
{
xtables_register_matches(tos_mt_reg, ARRAY_SIZE(tos_mt_reg));
}
|
