summaryrefslogtreecommitdiffstats
path: root/extensions/libipt_POOL.c
blob: 62697710f1270dc9003d0abcf7d9617f94887245 (plain)
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
/* Shared library add-on to iptables to add IP pool mangling target. */
#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_tables.h>
#include <linux/netfilter_ipv4/ip_nat_rule.h>
#include <linux/netfilter_ipv4/ip_pool.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"
" --add-srcip <pool>\n"
" --del-srcip <pool>\n"
" --add-dstip <pool>\n"
" --del-dstip <pool>\n"
"				add/del src/dst IP from pool.\n\n",
NETFILTER_VERSION);
}

static struct option opts[] = {
	{ "add-srcip", 1, 0, '1' },
	{ "del-srcip", 1, 0, '2' },
	{ "add-dstip", 1, 0, '3' },
	{ "del-dstip", 1, 0, '4' },
	{ 0 }
};

/* Initialize the target. */
static void
init(struct ipt_entry_target *target, unsigned int *nfcache)
{
	struct ipt_pool_info *ipi = (struct ipt_pool_info *) target->data;

	ipi->src = ipi->dst = IP_POOL_NONE;
	ipi->flags = 0;

	/* Can't cache this */
	*nfcache |= NFC_UNKNOWN;
}

/* 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,
      struct ipt_entry_target **target)
{
	struct ipt_pool_info *ipi = (struct ipt_pool_info *) (*target)->data;
	switch (c) {
	case '1':	/* --add-srcip <pool> */
		ipi->src = ip_pool_get_index(optarg);
		ipi->flags &= ~IPT_POOL_DEL_SRC;
		break;
	case '2':	/* --del-srcip <pool> */
		ipi->src = ip_pool_get_index(optarg);
		ipi->flags |= IPT_POOL_DEL_SRC;
		break;
	case '3':	/* --add-dstip <pool> */
		ipi->dst = ip_pool_get_index(optarg);
		ipi->flags &= ~IPT_POOL_DEL_DST;
		break;
	case '4':	/* --del-dstip <pool> */
		ipi->dst = ip_pool_get_index(optarg);
		ipi->flags |= IPT_POOL_DEL_DST;
		break;
	default:
		return 0;
	}
	return 1;
}

/* Final check; don't care. */
static void final_check(unsigned int flags)
{
}

/* Prints out the targinfo. */
static void
print(const struct ipt_ip *ip,
      const struct ipt_entry_target *target,
      int numeric)
{
	char buf[256];
	struct ipt_pool_info *ipi = (struct ipt_pool_info *) target->data;

	printf("POOL");
	if (ipi->src != IP_POOL_NONE) {
		printf(" --%s-srcip %s",
			(ipi->flags & IPT_POOL_DEL_SRC) ? "del" : "add",
			ip_pool_get_name(buf, sizeof(buf), ipi->src, numeric));
	}
	if (ipi->dst != IP_POOL_NONE) {
		printf(" --%s-dstip %s",
			(ipi->flags & IPT_POOL_DEL_DST) ? "del" : "add",
			ip_pool_get_name(buf, sizeof(buf), ipi->dst, numeric));
	}
}

/* Saves the union ipt_targinfo in parsable form to stdout. */
static void
save(const struct ipt_ip *ip, const struct ipt_entry_target *target)
{
	char buf[256];
	struct ipt_pool_info *ipi = (struct ipt_pool_info *) target->data;

	printf("-j POOL");
	if (ipi->src != IP_POOL_NONE) {
		printf(" --%s-srcip %s",
			(ipi->flags & IPT_POOL_DEL_SRC) ? "del" : "add",
			ip_pool_get_name(buf, sizeof(buf), ipi->src, 0));
	}
	if (ipi->dst != IP_POOL_NONE) {
		printf(" --%s-dstip %s",
			(ipi->flags & IPT_POOL_DEL_DST) ? "del" : "add",
			ip_pool_get_name(buf, sizeof(buf), ipi->dst, 0));
	}
}

static
struct iptables_target ipt_pool_target
= { NULL,
    "POOL",
    NETFILTER_VERSION,
    IPT_ALIGN(sizeof(struct ipt_pool_info)),
    IPT_ALIGN(sizeof(struct ipt_pool_info)),
    &help,
    &init,
    &parse,
    &final_check,
    &print,
    &save,
    opts
};

void _init(void)
{
	register_target(&ipt_pool_target);
}