1#ifndef _LIBIPT_SET_H
2#define _LIBIPT_SET_H
3
4#include <sys/types.h>
5#include <sys/socket.h>
6#include <errno.h>
7
8#ifdef DEBUG
9#define DEBUGP(x, args...) fprintf(stderr, x, ## args)
10#else
11#define DEBUGP(x, args...)
12#endif
13
14static void
15parse_bindings(const char *optarg, struct ipt_set_info *info)
16{
17	char *saved = strdup(optarg);
18	char *ptr, *tmp = saved;
19	int i = 0;
20
21	while (i < (IP_SET_MAX_BINDINGS - 1) && tmp != NULL) {
22		ptr = strsep(&tmp, ",");
23		if (strncmp(ptr, "src", 3) == 0)
24			info->flags[i++] |= IPSET_SRC;
25		else if (strncmp(ptr, "dst", 3) == 0)
26			info->flags[i++] |= IPSET_DST;
27		else
28			exit_error(PARAMETER_PROBLEM,
29				   "You must spefify (the comma separated list of) 'src' or 'dst'.");
30	}
31
32	if (tmp)
33		exit_error(PARAMETER_PROBLEM,
34			   "Can't follow bindings deeper than %i.",
35			   IP_SET_MAX_BINDINGS - 1);
36
37	free(saved);
38}
39
40static int get_set_getsockopt(void *data, socklen_t * size)
41{
42	int sockfd = -1;
43	sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
44	if (sockfd < 0)
45		exit_error(OTHER_PROBLEM,
46			   "Can't open socket to ipset.\n");
47	/* Send! */
48	return getsockopt(sockfd, SOL_IP, SO_IP_SET, data, size);
49}
50
51static void get_set_byname(const char *setname, struct ipt_set_info *info)
52{
53	struct ip_set_req_get_set req;
54	socklen_t size = sizeof(struct ip_set_req_get_set);
55	int res;
56
57	req.op = IP_SET_OP_GET_BYNAME;
58	req.version = IP_SET_PROTOCOL_VERSION;
59	strncpy(req.set.name, setname, IP_SET_MAXNAMELEN);
60	req.set.name[IP_SET_MAXNAMELEN - 1] = '\0';
61	res = get_set_getsockopt(&req, &size);
62	if (res != 0)
63		exit_error(OTHER_PROBLEM,
64			   "Problem when communicating with ipset, errno=%d.\n",
65			   errno);
66	if (size != sizeof(struct ip_set_req_get_set))
67		exit_error(OTHER_PROBLEM,
68			   "Incorrect return size from kernel during ipset lookup, "
69			   "(want %ld, got %ld)\n",
70			   sizeof(struct ip_set_req_get_set), size);
71	if (req.set.index == IP_SET_INVALID_ID)
72		exit_error(PARAMETER_PROBLEM,
73			   "Set %s doesn't exist.\n", setname);
74
75	info->index = req.set.index;
76}
77
78static void get_set_byid(char * setname, ip_set_id_t index)
79{
80	struct ip_set_req_get_set req;
81	socklen_t size = sizeof(struct ip_set_req_get_set);
82	int res;
83
84	req.op = IP_SET_OP_GET_BYINDEX;
85	req.version = IP_SET_PROTOCOL_VERSION;
86	req.set.index = index;
87	res = get_set_getsockopt(&req, &size);
88	if (res != 0)
89		exit_error(OTHER_PROBLEM,
90			   "Problem when communicating with ipset, errno=%d.\n",
91			   errno);
92	if (size != sizeof(struct ip_set_req_get_set))
93		exit_error(OTHER_PROBLEM,
94			   "Incorrect return size from kernel during ipset lookup, "
95			   "(want %ld, got %ld)\n",
96			   sizeof(struct ip_set_req_get_set), size);
97	if (req.set.name[0] == '\0')
98		exit_error(PARAMETER_PROBLEM,
99			   "Set id %i in kernel doesn't exist.\n", index);
100
101	strncpy(setname, req.set.name, IP_SET_MAXNAMELEN);
102}
103
104#endif /*_LIBIPT_SET_H*/
105