summaryrefslogtreecommitdiff
path: root/accel-pppd/libnetlink/ipset.c
blob: 7834b6445609e647cedbb1971dc85f7e3e4d3fab (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
#include "config.h"

#ifdef HAVE_IPSET

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <pthread.h>
#include <net/if_arp.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/uio.h>
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/ipset/ip_set.h>

#include "triton.h"
#include "log.h"

#include "libnetlink.h"
#include "ipset.h"

#include "memdebug.h"

static int __ipset_cmd(const char *name, in_addr_t addr, int cmd, int flags)
{
	struct rtnl_handle rth;
	struct req {
		struct nlmsghdr n;
		struct nfgenmsg nf;
		char buf[4096];
	} req;
	struct rtattr *tail1, *tail2;
	uint8_t protocol = IPSET_PROTOCOL;

	if (rtnl_open_byproto(&rth, 0, NETLINK_NETFILTER)) {
		log_error("ipset: cannot open rtnetlink\n");
		return -1;
	}

	memset(&req, 0, sizeof(req) - 4096);

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nfgenmsg));
	req.n.nlmsg_flags = flags;
	req.n.nlmsg_type = cmd | (NFNL_SUBSYS_IPSET << 8);
	req.nf.nfgen_family = AF_INET;
	req.nf.version = NFNETLINK_V0;
	req.nf.res_id = 0;

	addattr_l(&req.n, 4096, IPSET_ATTR_PROTOCOL, &protocol, 1);
	addattr_l(&req.n, 4096, IPSET_ATTR_SETNAME, name, strlen(name) + 1);

	tail1 = addattr_nest(&req.n, MAX_MSG, IPSET_ATTR_DATA | NLA_F_NESTED);

	tail2 = addattr_nest(&req.n, MAX_MSG, IPSET_ATTR_IP | NLA_F_NESTED);
	addattr32(&req.n, 4096, IPSET_ATTR_IPADDR_IPV4 | NLA_F_NET_BYTEORDER, addr);
	addattr_nest_end(&req.n, tail2);

	addattr_nest_end(&req.n, tail1);

	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL, 0) < 0)
		goto out_err;

	rtnl_close(&rth);

	return 0;

out_err:
	rtnl_close(&rth);

	return -1;

}

int __export ipset_add(const char *name, in_addr_t addr)
{
	return __ipset_cmd(name, addr, IPSET_CMD_ADD, NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL);
}

int __export ipset_del(const char *name, in_addr_t addr)
{
	return __ipset_cmd(name, addr, IPSET_CMD_DEL, NLM_F_REQUEST | NLM_F_ACK);
}

int __export ipset_flush(const char *name)
{
	struct rtnl_handle rth;
	struct req {
		struct nlmsghdr n;
		struct nfgenmsg nf;
		char buf[4096];
	} req;
	uint8_t protocol = IPSET_PROTOCOL;

	if (rtnl_open_byproto(&rth, 0, NETLINK_NETFILTER)) {
		log_error("ipset: cannot open rtnetlink\n");
		return -1;
	}

	memset(&req, 0, sizeof(req) - 4096);

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nfgenmsg));
	req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
	req.n.nlmsg_type = IPSET_CMD_FLUSH | (NFNL_SUBSYS_IPSET << 8);
	req.nf.nfgen_family = AF_INET;
	req.nf.version = NFNETLINK_V0;
	req.nf.res_id = 0;

	addattr_l(&req.n, 4096, IPSET_ATTR_PROTOCOL, &protocol, 1);
	addattr_l(&req.n, 4096, IPSET_ATTR_SETNAME, name, strlen(name) + 1);

	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL, 0) < 0)
		goto out_err;

	rtnl_close(&rth);

	return 0;

out_err:
	rtnl_close(&rth);

	return -1;
}

#else

#include <netinet/in.h>
#include "triton.h"

int __export ipset_add(const char *name, in_addr_t addr)
{
	return -1;
}

int __export ipset_del(const char *name, in_addr_t addr)
{
	return -1;
}

int __export ipset_flush(const char *name)
{
	return -1;
}

#endif