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 /* 2 Comment support added */
26 #define IPSET_TYPE_REV_MAX 3 /* skbinfo support added */
28 MODULE_LICENSE("GPL");
29 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
30 IP_SET_MODULE_DESC("bitmap:port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
31 MODULE_ALIAS("ip_set_bitmap:port");
33 #define MTYPE bitmap_port
37 void *members; /* the set members */
38 void *extensions; /* data extensions */
39 u16 first_port; /* host byte order, included in range */
40 u16 last_port; /* host byte order, included in range */
41 u32 elements; /* number of max elements in the set */
42 size_t memsize; /* members size */
43 struct timer_list gc; /* garbage collection */
46 /* ADT structure for generic function args */
47 struct bitmap_port_adt_elem {
52 port_to_id(const struct bitmap_port *m, u16 port)
54 return port - m->first_port;
57 /* Common functions */
60 bitmap_port_do_test(const struct bitmap_port_adt_elem *e,
61 const struct bitmap_port *map, size_t dsize)
63 return !!test_bit(e->id, map->members);
67 bitmap_port_gc_test(u16 id, const struct bitmap_port *map, size_t dsize)
69 return !!test_bit(id, map->members);
73 bitmap_port_do_add(const struct bitmap_port_adt_elem *e,
74 struct bitmap_port *map, u32 flags, size_t dsize)
76 return !!test_bit(e->id, map->members);
80 bitmap_port_do_del(const struct bitmap_port_adt_elem *e,
81 struct bitmap_port *map)
83 return !test_and_clear_bit(e->id, map->members);
87 bitmap_port_do_list(struct sk_buff *skb, const struct bitmap_port *map, u32 id,
90 return nla_put_net16(skb, IPSET_ATTR_PORT,
91 htons(map->first_port + id));
95 bitmap_port_do_head(struct sk_buff *skb, const struct bitmap_port *map)
97 return nla_put_net16(skb, IPSET_ATTR_PORT, htons(map->first_port)) ||
98 nla_put_net16(skb, IPSET_ATTR_PORT_TO, htons(map->last_port));
102 bitmap_port_kadt(struct ip_set *set, const struct sk_buff *skb,
103 const struct xt_action_param *par,
104 enum ipset_adt adt, struct ip_set_adt_opt *opt)
106 struct bitmap_port *map = set->data;
107 ipset_adtfn adtfn = set->variant->adt[adt];
108 struct bitmap_port_adt_elem e = { .id = 0 };
109 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
113 if (!ip_set_get_ip_port(skb, opt->family,
114 opt->flags & IPSET_DIM_ONE_SRC, &__port))
117 port = ntohs(__port);
119 if (port < map->first_port || port > map->last_port)
120 return -IPSET_ERR_BITMAP_RANGE;
122 e.id = port_to_id(map, port);
124 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
128 bitmap_port_uadt(struct ip_set *set, struct nlattr *tb[],
129 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
131 struct bitmap_port *map = set->data;
132 ipset_adtfn adtfn = set->variant->adt[adt];
133 struct bitmap_port_adt_elem e = { .id = 0 };
134 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
135 u32 port; /* wraparound */
139 if (tb[IPSET_ATTR_LINENO])
140 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
142 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
143 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
144 return -IPSET_ERR_PROTOCOL;
146 port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
147 if (port < map->first_port || port > map->last_port)
148 return -IPSET_ERR_BITMAP_RANGE;
149 ret = ip_set_get_extensions(set, tb, &ext);
153 if (adt == IPSET_TEST) {
154 e.id = port_to_id(map, port);
155 return adtfn(set, &e, &ext, &ext, flags);
158 if (tb[IPSET_ATTR_PORT_TO]) {
159 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
160 if (port > port_to) {
162 if (port < map->first_port)
163 return -IPSET_ERR_BITMAP_RANGE;
169 if (port_to > map->last_port)
170 return -IPSET_ERR_BITMAP_RANGE;
172 for (; port <= port_to; port++) {
173 e.id = port_to_id(map, port);
174 ret = adtfn(set, &e, &ext, &ext, flags);
176 if (ret && !ip_set_eexist(ret, flags))
185 bitmap_port_same_set(const struct ip_set *a, const struct ip_set *b)
187 const struct bitmap_port *x = a->data;
188 const struct bitmap_port *y = b->data;
190 return x->first_port == y->first_port &&
191 x->last_port == y->last_port &&
192 a->timeout == b->timeout &&
193 a->extensions == b->extensions;
198 struct bitmap_port_elem {
201 #include "ip_set_bitmap_gen.h"
203 /* Create bitmap:ip type of sets */
206 init_map_port(struct ip_set *set, struct bitmap_port *map,
207 u16 first_port, u16 last_port)
209 map->members = ip_set_alloc(map->memsize);
213 map->extensions = ip_set_alloc(set->dsize * map->elements);
214 if (!map->extensions) {
219 map->first_port = first_port;
220 map->last_port = last_port;
221 set->timeout = IPSET_NO_TIMEOUT;
224 set->family = NFPROTO_UNSPEC;
230 bitmap_port_create(struct net *net, struct ip_set *set, struct nlattr *tb[],
233 struct bitmap_port *map;
234 u16 first_port, last_port;
236 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
237 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT_TO) ||
238 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
239 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
240 return -IPSET_ERR_PROTOCOL;
242 first_port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
243 last_port = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
244 if (first_port > last_port) {
245 u16 tmp = first_port;
247 first_port = last_port;
251 map = kzalloc(sizeof(*map), GFP_KERNEL);
255 map->elements = last_port - first_port + 1;
256 map->memsize = bitmap_bytes(0, map->elements);
257 set->variant = &bitmap_port;
258 set->dsize = ip_set_elem_len(set, tb, 0);
259 if (!init_map_port(set, map, first_port, last_port)) {
263 if (tb[IPSET_ATTR_TIMEOUT]) {
264 set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
265 bitmap_port_gc_init(set, bitmap_port_gc);
270 static struct ip_set_type bitmap_port_type = {
271 .name = "bitmap:port",
272 .protocol = IPSET_PROTOCOL,
273 .features = IPSET_TYPE_PORT,
274 .dimension = IPSET_DIM_ONE,
275 .family = NFPROTO_UNSPEC,
276 .revision_min = IPSET_TYPE_REV_MIN,
277 .revision_max = IPSET_TYPE_REV_MAX,
278 .create = bitmap_port_create,
280 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
281 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
282 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
283 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
286 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
287 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
288 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
289 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
290 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
291 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
292 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
293 .len = IPSET_MAX_COMMENT_SIZE },
294 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
295 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
296 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
302 bitmap_port_init(void)
304 return ip_set_type_register(&bitmap_port_type);
308 bitmap_port_fini(void)
311 ip_set_type_unregister(&bitmap_port_type);
314 module_init(bitmap_port_init);
315 module_exit(bitmap_port_fini);