1 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 as
5 * published by the Free Software Foundation.
8 /* Kernel module implementing an IP set type: the bitmap:port type */
10 #include <linux/module.h>
12 #include <linux/skbuff.h>
13 #include <linux/errno.h>
14 #include <linux/netlink.h>
15 #include <linux/jiffies.h>
16 #include <linux/timer.h>
17 #include <net/netlink.h>
19 #include <linux/netfilter/ipset/ip_set.h>
20 #include <linux/netfilter/ipset/ip_set_bitmap.h>
21 #include <linux/netfilter/ipset/ip_set_getport.h>
23 #define IPSET_TYPE_REV_MIN 0
24 /* 1 Counter support added */
25 #define IPSET_TYPE_REV_MAX 2 /* Comment support added */
27 MODULE_LICENSE("GPL");
28 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
29 IP_SET_MODULE_DESC("bitmap:port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
30 MODULE_ALIAS("ip_set_bitmap:port");
32 #define MTYPE bitmap_port
36 void *members; /* the set members */
37 void *extensions; /* data extensions */
38 u16 first_port; /* host byte order, included in range */
39 u16 last_port; /* host byte order, included in range */
40 u32 elements; /* number of max elements in the set */
41 size_t memsize; /* members size */
42 struct timer_list gc; /* garbage collection */
45 /* ADT structure for generic function args */
46 struct bitmap_port_adt_elem {
51 port_to_id(const struct bitmap_port *m, u16 port)
53 return port - m->first_port;
56 /* Common functions */
59 bitmap_port_do_test(const struct bitmap_port_adt_elem *e,
60 const struct bitmap_port *map, size_t dsize)
62 return !!test_bit(e->id, map->members);
66 bitmap_port_gc_test(u16 id, const struct bitmap_port *map, size_t dsize)
68 return !!test_bit(id, map->members);
72 bitmap_port_do_add(const struct bitmap_port_adt_elem *e,
73 struct bitmap_port *map, u32 flags, size_t dsize)
75 return !!test_and_set_bit(e->id, map->members);
79 bitmap_port_do_del(const struct bitmap_port_adt_elem *e,
80 struct bitmap_port *map)
82 return !test_and_clear_bit(e->id, map->members);
86 bitmap_port_do_list(struct sk_buff *skb, const struct bitmap_port *map, u32 id,
89 return nla_put_net16(skb, IPSET_ATTR_PORT,
90 htons(map->first_port + id));
94 bitmap_port_do_head(struct sk_buff *skb, const struct bitmap_port *map)
96 return nla_put_net16(skb, IPSET_ATTR_PORT, htons(map->first_port)) ||
97 nla_put_net16(skb, IPSET_ATTR_PORT_TO, htons(map->last_port));
101 bitmap_port_kadt(struct ip_set *set, const struct sk_buff *skb,
102 const struct xt_action_param *par,
103 enum ipset_adt adt, struct ip_set_adt_opt *opt)
105 struct bitmap_port *map = set->data;
106 ipset_adtfn adtfn = set->variant->adt[adt];
107 struct bitmap_port_adt_elem e = {};
108 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
112 if (!ip_set_get_ip_port(skb, opt->family,
113 opt->flags & IPSET_DIM_ONE_SRC, &__port))
116 port = ntohs(__port);
118 if (port < map->first_port || port > map->last_port)
119 return -IPSET_ERR_BITMAP_RANGE;
121 e.id = port_to_id(map, port);
123 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
127 bitmap_port_uadt(struct ip_set *set, struct nlattr *tb[],
128 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
130 struct bitmap_port *map = set->data;
131 ipset_adtfn adtfn = set->variant->adt[adt];
132 struct bitmap_port_adt_elem e = {};
133 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
134 u32 port; /* wraparound */
138 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
139 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
140 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
141 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
142 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
143 return -IPSET_ERR_PROTOCOL;
145 if (tb[IPSET_ATTR_LINENO])
146 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
148 port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
149 if (port < map->first_port || port > map->last_port)
150 return -IPSET_ERR_BITMAP_RANGE;
151 ret = ip_set_get_extensions(set, tb, &ext);
155 if (adt == IPSET_TEST) {
156 e.id = port_to_id(map, port);
157 return adtfn(set, &e, &ext, &ext, flags);
160 if (tb[IPSET_ATTR_PORT_TO]) {
161 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
162 if (port > port_to) {
164 if (port < map->first_port)
165 return -IPSET_ERR_BITMAP_RANGE;
170 if (port_to > map->last_port)
171 return -IPSET_ERR_BITMAP_RANGE;
173 for (; port <= port_to; port++) {
174 e.id = port_to_id(map, port);
175 ret = adtfn(set, &e, &ext, &ext, flags);
177 if (ret && !ip_set_eexist(ret, flags))
186 bitmap_port_same_set(const struct ip_set *a, const struct ip_set *b)
188 const struct bitmap_port *x = a->data;
189 const struct bitmap_port *y = b->data;
191 return x->first_port == y->first_port &&
192 x->last_port == y->last_port &&
193 a->timeout == b->timeout &&
194 a->extensions == b->extensions;
199 struct bitmap_port_elem {
202 #include "ip_set_bitmap_gen.h"
204 /* Create bitmap:ip type of sets */
207 init_map_port(struct ip_set *set, struct bitmap_port *map,
208 u16 first_port, u16 last_port)
210 map->members = ip_set_alloc(map->memsize);
214 map->extensions = ip_set_alloc(set->dsize * map->elements);
215 if (!map->extensions) {
220 map->first_port = first_port;
221 map->last_port = last_port;
222 set->timeout = IPSET_NO_TIMEOUT;
225 set->family = NFPROTO_UNSPEC;
231 bitmap_port_create(struct net *net, struct ip_set *set, struct nlattr *tb[],
234 struct bitmap_port *map;
235 u16 first_port, last_port;
237 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
238 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT_TO) ||
239 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
240 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
241 return -IPSET_ERR_PROTOCOL;
243 first_port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
244 last_port = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
245 if (first_port > last_port) {
246 u16 tmp = first_port;
248 first_port = last_port;
252 map = kzalloc(sizeof(*map), GFP_KERNEL);
256 map->elements = last_port - first_port + 1;
257 map->memsize = bitmap_bytes(0, map->elements);
258 set->variant = &bitmap_port;
259 set->dsize = ip_set_elem_len(set, tb, 0);
260 if (!init_map_port(set, map, first_port, last_port)) {
264 if (tb[IPSET_ATTR_TIMEOUT]) {
265 set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
266 bitmap_port_gc_init(set, bitmap_port_gc);
271 static struct ip_set_type bitmap_port_type = {
272 .name = "bitmap:port",
273 .protocol = IPSET_PROTOCOL,
274 .features = IPSET_TYPE_PORT,
275 .dimension = IPSET_DIM_ONE,
276 .family = NFPROTO_UNSPEC,
277 .revision_min = IPSET_TYPE_REV_MIN,
278 .revision_max = IPSET_TYPE_REV_MAX,
279 .create = bitmap_port_create,
281 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
282 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
283 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
284 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
287 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
288 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
289 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
290 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
291 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
292 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
293 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
299 bitmap_port_init(void)
301 return ip_set_type_register(&bitmap_port_type);
305 bitmap_port_fini(void)
307 ip_set_type_unregister(&bitmap_port_type);
310 module_init(bitmap_port_init);
311 module_exit(bitmap_port_fini);