1 /* Copyright (C) 2003-2011 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 hash:net,port type */
10 #include <linux/jhash.h>
11 #include <linux/module.h>
13 #include <linux/skbuff.h>
14 #include <linux/errno.h>
15 #include <linux/random.h>
18 #include <net/netlink.h>
20 #include <linux/netfilter.h>
21 #include <linux/netfilter/ipset/pfxlen.h>
22 #include <linux/netfilter/ipset/ip_set.h>
23 #include <linux/netfilter/ipset/ip_set_timeout.h>
24 #include <linux/netfilter/ipset/ip_set_getport.h>
25 #include <linux/netfilter/ipset/ip_set_hash.h>
27 MODULE_LICENSE("GPL");
28 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
29 MODULE_DESCRIPTION("hash:net,port type of IP sets");
30 MODULE_ALIAS("ip_set_hash:net,port");
32 /* Type specific function prefix */
33 #define TYPE hash_netport
36 hash_netport_same_set(const struct ip_set *a, const struct ip_set *b);
38 #define hash_netport4_same_set hash_netport_same_set
39 #define hash_netport6_same_set hash_netport_same_set
41 /* The type variant functions: IPv4 */
43 /* Member elements without timeout */
44 struct hash_netport4_elem {
51 /* Member elements with timeout support */
52 struct hash_netport4_telem {
57 unsigned long timeout;
61 hash_netport4_data_equal(const struct hash_netport4_elem *ip1,
62 const struct hash_netport4_elem *ip2)
64 return ip1->ip == ip2->ip &&
65 ip1->port == ip2->port &&
66 ip1->proto == ip2->proto &&
67 ip1->cidr == ip2->cidr;
71 hash_netport4_data_isnull(const struct hash_netport4_elem *elem)
73 return elem->proto == 0;
77 hash_netport4_data_copy(struct hash_netport4_elem *dst,
78 const struct hash_netport4_elem *src)
81 dst->port = src->port;
82 dst->proto = src->proto;
83 dst->cidr = src->cidr;
87 hash_netport4_data_netmask(struct hash_netport4_elem *elem, u8 cidr)
89 elem->ip &= ip_set_netmask(cidr);
94 hash_netport4_data_zero_out(struct hash_netport4_elem *elem)
100 hash_netport4_data_list(struct sk_buff *skb,
101 const struct hash_netport4_elem *data)
103 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
104 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
105 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
106 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
114 hash_netport4_data_tlist(struct sk_buff *skb,
115 const struct hash_netport4_elem *data)
117 const struct hash_netport4_telem *tdata =
118 (const struct hash_netport4_telem *)data;
120 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
121 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
122 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
123 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
124 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
125 htonl(ip_set_timeout_get(tdata->timeout)));
133 #define IP_SET_HASH_WITH_PROTO
134 #define IP_SET_HASH_WITH_NETS
138 #include <linux/netfilter/ipset/ip_set_ahash.h>
141 hash_netport4_kadt(struct ip_set *set, const struct sk_buff *skb,
142 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
144 const struct ip_set_hash *h = set->data;
145 ipset_adtfn adtfn = set->variant->adt[adt];
146 struct hash_netport4_elem data = {
147 .cidr = h->nets[0].cidr || HOST_MASK };
151 if (adt == IPSET_TEST)
152 data.cidr = HOST_MASK;
154 if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
155 &data.port, &data.proto))
158 ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
159 data.ip &= ip_set_netmask(data.cidr);
161 return adtfn(set, &data, h->timeout);
165 hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
166 enum ipset_adt adt, u32 *lineno, u32 flags)
168 const struct ip_set_hash *h = set->data;
169 ipset_adtfn adtfn = set->variant->adt[adt];
170 struct hash_netport4_elem data = { .cidr = HOST_MASK };
172 u32 timeout = h->timeout;
175 if (unlikely(!tb[IPSET_ATTR_IP] ||
176 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
177 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
178 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
179 return -IPSET_ERR_PROTOCOL;
181 if (tb[IPSET_ATTR_LINENO])
182 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
184 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
188 if (tb[IPSET_ATTR_CIDR])
189 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
191 return -IPSET_ERR_INVALID_CIDR;
192 data.ip &= ip_set_netmask(data.cidr);
194 if (tb[IPSET_ATTR_PORT])
195 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
197 return -IPSET_ERR_PROTOCOL;
199 if (tb[IPSET_ATTR_PROTO]) {
200 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
203 return -IPSET_ERR_INVALID_PROTO;
205 return -IPSET_ERR_MISSING_PROTO;
207 switch (data.proto) {
217 if (tb[IPSET_ATTR_TIMEOUT]) {
218 if (!with_timeout(h->timeout))
219 return -IPSET_ERR_TIMEOUT;
220 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
223 if (adt == IPSET_TEST ||
224 !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
225 !tb[IPSET_ATTR_PORT_TO]) {
226 ret = adtfn(set, &data, timeout);
227 return ip_set_eexist(ret, flags) ? 0 : ret;
230 port = ntohs(data.port);
231 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
235 for (; port <= port_to; port++) {
236 data.port = htons(port);
237 ret = adtfn(set, &data, timeout);
239 if (ret && !ip_set_eexist(ret, flags))
248 hash_netport_same_set(const struct ip_set *a, const struct ip_set *b)
250 const struct ip_set_hash *x = a->data;
251 const struct ip_set_hash *y = b->data;
253 /* Resizing changes htable_bits, so we ignore it */
254 return x->maxelem == y->maxelem &&
255 x->timeout == y->timeout;
258 /* The type variant functions: IPv6 */
260 struct hash_netport6_elem {
261 union nf_inet_addr ip;
267 struct hash_netport6_telem {
268 union nf_inet_addr ip;
272 unsigned long timeout;
276 hash_netport6_data_equal(const struct hash_netport6_elem *ip1,
277 const struct hash_netport6_elem *ip2)
279 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
280 ip1->port == ip2->port &&
281 ip1->proto == ip2->proto &&
282 ip1->cidr == ip2->cidr;
286 hash_netport6_data_isnull(const struct hash_netport6_elem *elem)
288 return elem->proto == 0;
292 hash_netport6_data_copy(struct hash_netport6_elem *dst,
293 const struct hash_netport6_elem *src)
295 memcpy(dst, src, sizeof(*dst));
299 hash_netport6_data_zero_out(struct hash_netport6_elem *elem)
305 ip6_netmask(union nf_inet_addr *ip, u8 prefix)
307 ip->ip6[0] &= ip_set_netmask6(prefix)[0];
308 ip->ip6[1] &= ip_set_netmask6(prefix)[1];
309 ip->ip6[2] &= ip_set_netmask6(prefix)[2];
310 ip->ip6[3] &= ip_set_netmask6(prefix)[3];
314 hash_netport6_data_netmask(struct hash_netport6_elem *elem, u8 cidr)
316 ip6_netmask(&elem->ip, cidr);
321 hash_netport6_data_list(struct sk_buff *skb,
322 const struct hash_netport6_elem *data)
324 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
325 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
326 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
327 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
335 hash_netport6_data_tlist(struct sk_buff *skb,
336 const struct hash_netport6_elem *data)
338 const struct hash_netport6_telem *e =
339 (const struct hash_netport6_telem *)data;
341 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
342 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
343 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
344 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
345 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
346 htonl(ip_set_timeout_get(e->timeout)));
357 #define HOST_MASK 128
358 #include <linux/netfilter/ipset/ip_set_ahash.h>
361 hash_netport6_kadt(struct ip_set *set, const struct sk_buff *skb,
362 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
364 const struct ip_set_hash *h = set->data;
365 ipset_adtfn adtfn = set->variant->adt[adt];
366 struct hash_netport6_elem data = {
367 .cidr = h->nets[0].cidr || HOST_MASK };
371 if (adt == IPSET_TEST)
372 data.cidr = HOST_MASK;
374 if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
375 &data.port, &data.proto))
378 ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
379 ip6_netmask(&data.ip, data.cidr);
381 return adtfn(set, &data, h->timeout);
385 hash_netport6_uadt(struct ip_set *set, struct nlattr *tb[],
386 enum ipset_adt adt, u32 *lineno, u32 flags)
388 const struct ip_set_hash *h = set->data;
389 ipset_adtfn adtfn = set->variant->adt[adt];
390 struct hash_netport6_elem data = { .cidr = HOST_MASK };
392 u32 timeout = h->timeout;
395 if (unlikely(!tb[IPSET_ATTR_IP] ||
396 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
397 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
398 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
399 return -IPSET_ERR_PROTOCOL;
401 if (tb[IPSET_ATTR_LINENO])
402 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
404 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
408 if (tb[IPSET_ATTR_CIDR])
409 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
411 return -IPSET_ERR_INVALID_CIDR;
412 ip6_netmask(&data.ip, data.cidr);
414 if (tb[IPSET_ATTR_PORT])
415 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
417 return -IPSET_ERR_PROTOCOL;
419 if (tb[IPSET_ATTR_PROTO]) {
420 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
423 return -IPSET_ERR_INVALID_PROTO;
425 return -IPSET_ERR_MISSING_PROTO;
427 switch (data.proto) {
437 if (tb[IPSET_ATTR_TIMEOUT]) {
438 if (!with_timeout(h->timeout))
439 return -IPSET_ERR_TIMEOUT;
440 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
443 if (adt == IPSET_TEST ||
444 !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
445 !tb[IPSET_ATTR_PORT_TO]) {
446 ret = adtfn(set, &data, timeout);
447 return ip_set_eexist(ret, flags) ? 0 : ret;
450 port = ntohs(data.port);
451 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
455 for (; port <= port_to; port++) {
456 data.port = htons(port);
457 ret = adtfn(set, &data, timeout);
459 if (ret && !ip_set_eexist(ret, flags))
467 /* Create hash:ip type of sets */
470 hash_netport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
472 struct ip_set_hash *h;
473 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
476 if (!(set->family == AF_INET || set->family == AF_INET6))
477 return -IPSET_ERR_INVALID_FAMILY;
479 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
480 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
481 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
482 return -IPSET_ERR_PROTOCOL;
484 if (tb[IPSET_ATTR_HASHSIZE]) {
485 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
486 if (hashsize < IPSET_MIMINAL_HASHSIZE)
487 hashsize = IPSET_MIMINAL_HASHSIZE;
490 if (tb[IPSET_ATTR_MAXELEM])
491 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
493 h = kzalloc(sizeof(*h)
494 + sizeof(struct ip_set_hash_nets)
495 * (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
499 h->maxelem = maxelem;
500 get_random_bytes(&h->initval, sizeof(h->initval));
501 h->timeout = IPSET_NO_TIMEOUT;
503 hbits = htable_bits(hashsize);
504 h->table = ip_set_alloc(
505 sizeof(struct htable)
506 + jhash_size(hbits) * sizeof(struct hbucket));
511 h->table->htable_bits = hbits;
515 if (tb[IPSET_ATTR_TIMEOUT]) {
516 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
518 set->variant = set->family == AF_INET
519 ? &hash_netport4_tvariant : &hash_netport6_tvariant;
521 if (set->family == AF_INET)
522 hash_netport4_gc_init(set);
524 hash_netport6_gc_init(set);
526 set->variant = set->family == AF_INET
527 ? &hash_netport4_variant : &hash_netport6_variant;
530 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
531 set->name, jhash_size(h->table->htable_bits),
532 h->table->htable_bits, h->maxelem, set->data, h->table);
537 static struct ip_set_type hash_netport_type __read_mostly = {
538 .name = "hash:net,port",
539 .protocol = IPSET_PROTOCOL,
540 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
541 .dimension = IPSET_DIM_TWO,
544 .create = hash_netport_create,
546 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
547 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
548 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
549 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
550 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
551 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
554 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
555 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
556 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
557 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
558 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
559 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
560 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
566 hash_netport_init(void)
568 return ip_set_type_register(&hash_netport_type);
572 hash_netport_fini(void)
574 ip_set_type_unregister(&hash_netport_type);
577 module_init(hash_netport_init);
578 module_exit(hash_netport_fini);