1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
5 /* Kernel module implementing an IP set type: the bitmap:port type */
7 #include <linux/module.h>
9 #include <linux/skbuff.h>
10 #include <linux/errno.h>
11 #include <linux/netlink.h>
12 #include <linux/jiffies.h>
13 #include <linux/timer.h>
14 #include <net/netlink.h>
16 #include <linux/netfilter/ipset/ip_set.h>
17 #include <linux/netfilter/ipset/ip_set_bitmap.h>
18 #include <linux/netfilter/ipset/ip_set_getport.h>
20 #define IPSET_TYPE_REV_MIN 0
21 /* 1 Counter support added */
22 /* 2 Comment support added */
23 #define IPSET_TYPE_REV_MAX 3 /* skbinfo support added */
25 MODULE_LICENSE("GPL");
26 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
27 IP_SET_MODULE_DESC("bitmap:port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
28 MODULE_ALIAS("ip_set_bitmap:port");
30 #define MTYPE bitmap_port
34 void *members; /* the set members */
35 u16 first_port; /* host byte order, included in range */
36 u16 last_port; /* host byte order, included in range */
37 u32 elements; /* number of max elements in the set */
38 size_t memsize; /* members size */
39 struct timer_list gc; /* garbage collection */
40 struct ip_set *set; /* attached to this ip_set */
41 unsigned char extensions[0] /* data extensions */
42 __aligned(__alignof__(u64));
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_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 = { .id = 0 };
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 = { .id = 0 };
133 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
134 u32 port; /* wraparound */
138 if (tb[IPSET_ATTR_LINENO])
139 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
141 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
142 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
143 return -IPSET_ERR_PROTOCOL;
145 port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
146 if (port < map->first_port || port > map->last_port)
147 return -IPSET_ERR_BITMAP_RANGE;
148 ret = ip_set_get_extensions(set, tb, &ext);
152 if (adt == IPSET_TEST) {
153 e.id = port_to_id(map, port);
154 return adtfn(set, &e, &ext, &ext, flags);
157 if (tb[IPSET_ATTR_PORT_TO]) {
158 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
159 if (port > port_to) {
161 if (port < map->first_port)
162 return -IPSET_ERR_BITMAP_RANGE;
168 if (port_to > map->last_port)
169 return -IPSET_ERR_BITMAP_RANGE;
171 for (; port <= port_to; port++) {
172 e.id = port_to_id(map, port);
173 ret = adtfn(set, &e, &ext, &ext, flags);
175 if (ret && !ip_set_eexist(ret, flags))
184 bitmap_port_same_set(const struct ip_set *a, const struct ip_set *b)
186 const struct bitmap_port *x = a->data;
187 const struct bitmap_port *y = b->data;
189 return x->first_port == y->first_port &&
190 x->last_port == y->last_port &&
191 a->timeout == b->timeout &&
192 a->extensions == b->extensions;
197 struct bitmap_port_elem {
200 #include "ip_set_bitmap_gen.h"
202 /* Create bitmap:ip type of sets */
205 init_map_port(struct ip_set *set, struct bitmap_port *map,
206 u16 first_port, u16 last_port)
208 map->members = ip_set_alloc(map->memsize);
211 map->first_port = first_port;
212 map->last_port = last_port;
213 set->timeout = IPSET_NO_TIMEOUT;
217 set->family = NFPROTO_UNSPEC;
223 bitmap_port_create(struct net *net, struct ip_set *set, struct nlattr *tb[],
226 struct bitmap_port *map;
227 u16 first_port, last_port;
230 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
231 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT_TO) ||
232 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
233 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
234 return -IPSET_ERR_PROTOCOL;
236 first_port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
237 last_port = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
238 if (first_port > last_port)
239 swap(first_port, last_port);
241 elements = last_port - first_port + 1;
242 set->dsize = ip_set_elem_len(set, tb, 0, 0);
243 map = ip_set_alloc(sizeof(*map) + elements * set->dsize);
247 map->elements = elements;
248 map->memsize = bitmap_bytes(0, map->elements);
249 set->variant = &bitmap_port;
250 if (!init_map_port(set, map, first_port, last_port)) {
254 if (tb[IPSET_ATTR_TIMEOUT]) {
255 set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
256 bitmap_port_gc_init(set, bitmap_port_gc);
261 static struct ip_set_type bitmap_port_type = {
262 .name = "bitmap:port",
263 .protocol = IPSET_PROTOCOL,
264 .features = IPSET_TYPE_PORT,
265 .dimension = IPSET_DIM_ONE,
266 .family = NFPROTO_UNSPEC,
267 .revision_min = IPSET_TYPE_REV_MIN,
268 .revision_max = IPSET_TYPE_REV_MAX,
269 .create = bitmap_port_create,
271 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
272 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
273 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
274 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
277 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
278 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
279 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
280 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
281 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
282 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
283 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
284 .len = IPSET_MAX_COMMENT_SIZE },
285 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
286 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
287 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
293 bitmap_port_init(void)
295 return ip_set_type_register(&bitmap_port_type);
299 bitmap_port_fini(void)
302 ip_set_type_unregister(&bitmap_port_type);
305 module_init(bitmap_port_init);
306 module_exit(bitmap_port_fini);