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
|
/* Shared library add-on to iptables to add IP address pool matching. */
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <ctype.h>
#include <iptables.h>
#include <linux/netfilter_ipv4/ip_conntrack.h>
#include <linux/netfilter_ipv4/ipt_pool.h>
#include <libippool/ip_pool_support.h>
/* FIXME --RR */
#include "../ippool/libippool.c"
/* Function which prints out usage message. */
static void
help(void)
{
printf(
"pool v%s options:\n"
" [!] --srcpool NAME|INDEX\n"
" [!] --dstpool NAME|INDEX\n"
" Pool index (or name from %s) to match\n"
"\n", IPTABLES_VERSION, IPPOOL_CONF);
}
static struct option opts[] = {
{ "srcpool", 1, 0, '1' },
{ "dstpool", 1, 0, '2' },
{0}
};
/* Initialize the match. */
static void
init(struct ipt_entry_match *match, unsigned int *nfcache)
{
struct ipt_pool_info *info =
(struct ipt_pool_info *)match->data;
info->src = IP_POOL_NONE;
info->dst = IP_POOL_NONE;
info->flags = 0;
}
/* Function which parses command options; returns true if it ate an option */
static int
parse(int c, char **argv, int invert, unsigned int *flags,
const struct ipt_entry *entry,
unsigned int *nfcache,
struct ipt_entry_match **match)
{
struct ipt_pool_info *info =
(struct ipt_pool_info *)(*match)->data;
switch (c) {
case '1':
check_inverse(optarg, &invert, &optind, 0);
info->src = ip_pool_get_index(argv[optind-1]);
if (invert) info->flags |= IPT_POOL_INV_SRC;
*flags = 1;
break;
case '2':
check_inverse(optarg, &invert, &optind, 0);
info->dst = ip_pool_get_index(argv[optind-1]);
if (invert) info->flags |= IPT_POOL_INV_DST;
*flags = 1;
break;
default:
return 0;
}
return 1;
}
/* Final check; must have specified --srcpool or --dstpool. */
static void final_check(unsigned int flags)
{
if (!flags)
exit_error(PARAMETER_PROBLEM, "You must specify either `--srcpool or --dstpool'");
}
/* Prints out the matchinfo. */
static void
print(const struct ipt_ip *ip,
const struct ipt_entry_match *match,
int numeric)
{
char buf[256];
struct ipt_pool_info *info =
(struct ipt_pool_info *)match->data;
if (info->src != IP_POOL_NONE)
printf("%ssrcpool %s ",
(info->flags & IPT_POOL_INV_SRC) ? "!" : "",
ip_pool_get_name(buf, sizeof(buf), info->src, 0));
if (info->dst != IP_POOL_NONE)
printf("%sdstpool %s ",
(info->flags & IPT_POOL_INV_DST) ? "!" : "",
ip_pool_get_name(buf, sizeof(buf), info->dst, 0));
}
/* Saves the matchinfo in parsable form to stdout. */
static void save(const struct ipt_ip *ip, const struct ipt_entry_match *match)
{
char buf[256];
struct ipt_pool_info *info =
(struct ipt_pool_info *)match->data;
if (info->src != IP_POOL_NONE)
printf("%s--srcpool %s ",
(info->flags & IPT_POOL_INV_SRC) ? "! " : "",
ip_pool_get_name(buf, sizeof(buf), info->src, 0));
if (info->dst != IP_POOL_NONE)
printf("%s--dstpool %s ",
(info->flags & IPT_POOL_INV_DST) ? "! " : "",
ip_pool_get_name(buf, sizeof(buf), info->dst, 0));
}
static struct iptables_match pool = {
.next = NULL,
.name = "pool",
.version = IPTABLES_VERSION,
.size = IPT_ALIGN(sizeof(struct ipt_pool_info)),
.userspacesize = IPT_ALIGN(sizeof(struct ipt_pool_info)),
.help = &help,
.init = &init,
.parse = &parse,
.final_check = &final_check,
.print = &print,
.save = &save,
.extra_opts = opts
};
void _init(void)
{
register_match(&pool);
}
|
