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:ip,port,net 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>
21 #include <linux/netfilter.h>
22 #include <linux/netfilter/ipset/pfxlen.h>
23 #include <linux/netfilter/ipset/ip_set.h>
24 #include <linux/netfilter/ipset/ip_set_timeout.h>
25 #include <linux/netfilter/ipset/ip_set_getport.h>
26 #include <linux/netfilter/ipset/ip_set_hash.h>
28 MODULE_LICENSE("GPL");
29 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
30 MODULE_DESCRIPTION("hash:ip,port,net type of IP sets");
31 MODULE_ALIAS("ip_set_hash:ip,port,net");
33 /* Type specific function prefix */
34 #define TYPE hash_ipportnet
37 hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b);
39 #define hash_ipportnet4_same_set hash_ipportnet_same_set
40 #define hash_ipportnet6_same_set hash_ipportnet_same_set
42 /* The type variant functions: IPv4 */
44 /* Member elements without timeout */
45 struct hash_ipportnet4_elem {
53 /* Member elements with timeout support */
54 struct hash_ipportnet4_telem {
60 unsigned long timeout;
64 hash_ipportnet4_data_equal(const struct hash_ipportnet4_elem *ip1,
65 const struct hash_ipportnet4_elem *ip2)
67 return ip1->ip == ip2->ip &&
68 ip1->ip2 == ip2->ip2 &&
69 ip1->cidr == ip2->cidr &&
70 ip1->port == ip2->port &&
71 ip1->proto == ip2->proto;
75 hash_ipportnet4_data_isnull(const struct hash_ipportnet4_elem *elem)
77 return elem->proto == 0;
81 hash_ipportnet4_data_copy(struct hash_ipportnet4_elem *dst,
82 const struct hash_ipportnet4_elem *src)
84 memcpy(dst, src, sizeof(*dst));
88 hash_ipportnet4_data_netmask(struct hash_ipportnet4_elem *elem, u8 cidr)
90 elem->ip2 &= ip_set_netmask(cidr);
95 hash_ipportnet4_data_zero_out(struct hash_ipportnet4_elem *elem)
101 hash_ipportnet4_data_list(struct sk_buff *skb,
102 const struct hash_ipportnet4_elem *data)
104 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
105 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, data->ip2);
106 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
107 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
108 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
116 hash_ipportnet4_data_tlist(struct sk_buff *skb,
117 const struct hash_ipportnet4_elem *data)
119 const struct hash_ipportnet4_telem *tdata =
120 (const struct hash_ipportnet4_telem *)data;
122 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
123 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, tdata->ip2);
124 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
125 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
126 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
127 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
128 htonl(ip_set_timeout_get(tdata->timeout)));
136 #define IP_SET_HASH_WITH_PROTO
137 #define IP_SET_HASH_WITH_NETS
141 #include <linux/netfilter/ipset/ip_set_ahash.h>
144 hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
145 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
147 const struct ip_set_hash *h = set->data;
148 ipset_adtfn adtfn = set->variant->adt[adt];
149 struct hash_ipportnet4_elem data = {
150 .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
155 if (adt == IPSET_TEST)
156 data.cidr = HOST_MASK;
158 if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
159 &data.port, &data.proto))
162 ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
163 ip4addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2);
164 data.ip2 &= ip_set_netmask(data.cidr);
166 return adtfn(set, &data, h->timeout);
170 hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
171 enum ipset_adt adt, u32 *lineno, u32 flags)
173 const struct ip_set_hash *h = set->data;
174 ipset_adtfn adtfn = set->variant->adt[adt];
175 struct hash_ipportnet4_elem data = { .cidr = HOST_MASK };
176 u32 ip, ip_to, p, port, port_to;
177 u32 timeout = h->timeout;
178 bool with_ports = false;
181 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
182 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
183 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
184 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
185 return -IPSET_ERR_PROTOCOL;
187 if (tb[IPSET_ATTR_LINENO])
188 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
190 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
194 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &data.ip2);
198 if (tb[IPSET_ATTR_CIDR2])
199 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
202 return -IPSET_ERR_INVALID_CIDR;
204 data.ip2 &= ip_set_netmask(data.cidr);
206 if (tb[IPSET_ATTR_PORT])
207 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
209 return -IPSET_ERR_PROTOCOL;
211 if (tb[IPSET_ATTR_PROTO]) {
212 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
213 with_ports = ip_set_proto_with_ports(data.proto);
216 return -IPSET_ERR_INVALID_PROTO;
218 return -IPSET_ERR_MISSING_PROTO;
220 if (!(with_ports || data.proto == IPPROTO_ICMP))
223 if (tb[IPSET_ATTR_TIMEOUT]) {
224 if (!with_timeout(h->timeout))
225 return -IPSET_ERR_TIMEOUT;
226 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
229 if (adt == IPSET_TEST ||
230 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
231 tb[IPSET_ATTR_PORT_TO])) {
232 ret = adtfn(set, &data, timeout);
233 return ip_set_eexist(ret, flags) ? 0 : ret;
237 if (tb[IPSET_ATTR_IP_TO]) {
238 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
243 } else if (tb[IPSET_ATTR_CIDR]) {
244 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
247 return -IPSET_ERR_INVALID_CIDR;
248 ip &= ip_set_hostmask(cidr);
249 ip_to = ip | ~ip_set_hostmask(cidr);
253 port_to = port = ntohs(data.port);
254 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
255 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
260 for (; !before(ip_to, ip); ip++)
261 for (p = port; p <= port_to; p++) {
263 data.port = htons(p);
264 ret = adtfn(set, &data, timeout);
266 if (ret && !ip_set_eexist(ret, flags))
275 hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b)
277 const struct ip_set_hash *x = a->data;
278 const struct ip_set_hash *y = b->data;
280 /* Resizing changes htable_bits, so we ignore it */
281 return x->maxelem == y->maxelem &&
282 x->timeout == y->timeout;
285 /* The type variant functions: IPv6 */
287 struct hash_ipportnet6_elem {
288 union nf_inet_addr ip;
289 union nf_inet_addr ip2;
295 struct hash_ipportnet6_telem {
296 union nf_inet_addr ip;
297 union nf_inet_addr ip2;
301 unsigned long timeout;
305 hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1,
306 const struct hash_ipportnet6_elem *ip2)
308 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
309 ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
310 ip1->cidr == ip2->cidr &&
311 ip1->port == ip2->port &&
312 ip1->proto == ip2->proto;
316 hash_ipportnet6_data_isnull(const struct hash_ipportnet6_elem *elem)
318 return elem->proto == 0;
322 hash_ipportnet6_data_copy(struct hash_ipportnet6_elem *dst,
323 const struct hash_ipportnet6_elem *src)
325 memcpy(dst, src, sizeof(*dst));
329 hash_ipportnet6_data_zero_out(struct hash_ipportnet6_elem *elem)
335 ip6_netmask(union nf_inet_addr *ip, u8 prefix)
337 ip->ip6[0] &= ip_set_netmask6(prefix)[0];
338 ip->ip6[1] &= ip_set_netmask6(prefix)[1];
339 ip->ip6[2] &= ip_set_netmask6(prefix)[2];
340 ip->ip6[3] &= ip_set_netmask6(prefix)[3];
344 hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr)
346 ip6_netmask(&elem->ip2, cidr);
351 hash_ipportnet6_data_list(struct sk_buff *skb,
352 const struct hash_ipportnet6_elem *data)
354 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
355 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
356 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
357 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
358 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
366 hash_ipportnet6_data_tlist(struct sk_buff *skb,
367 const struct hash_ipportnet6_elem *data)
369 const struct hash_ipportnet6_telem *e =
370 (const struct hash_ipportnet6_telem *)data;
372 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
373 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
374 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
375 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
376 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
377 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
378 htonl(ip_set_timeout_get(e->timeout)));
389 #define HOST_MASK 128
390 #include <linux/netfilter/ipset/ip_set_ahash.h>
393 hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
394 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
396 const struct ip_set_hash *h = set->data;
397 ipset_adtfn adtfn = set->variant->adt[adt];
398 struct hash_ipportnet6_elem data = {
399 .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
404 if (adt == IPSET_TEST)
405 data.cidr = HOST_MASK;
407 if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
408 &data.port, &data.proto))
411 ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
412 ip6addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
413 ip6_netmask(&data.ip2, data.cidr);
415 return adtfn(set, &data, h->timeout);
419 hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
420 enum ipset_adt adt, u32 *lineno, u32 flags)
422 const struct ip_set_hash *h = set->data;
423 ipset_adtfn adtfn = set->variant->adt[adt];
424 struct hash_ipportnet6_elem data = { .cidr = HOST_MASK };
426 u32 timeout = h->timeout;
427 bool with_ports = false;
430 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
431 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
432 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
433 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
434 tb[IPSET_ATTR_IP_TO] ||
435 tb[IPSET_ATTR_CIDR]))
436 return -IPSET_ERR_PROTOCOL;
438 if (tb[IPSET_ATTR_LINENO])
439 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
441 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
445 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
449 if (tb[IPSET_ATTR_CIDR2])
450 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
453 return -IPSET_ERR_INVALID_CIDR;
455 ip6_netmask(&data.ip2, data.cidr);
457 if (tb[IPSET_ATTR_PORT])
458 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
460 return -IPSET_ERR_PROTOCOL;
462 if (tb[IPSET_ATTR_PROTO]) {
463 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
464 with_ports = ip_set_proto_with_ports(data.proto);
467 return -IPSET_ERR_INVALID_PROTO;
469 return -IPSET_ERR_MISSING_PROTO;
471 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
474 if (tb[IPSET_ATTR_TIMEOUT]) {
475 if (!with_timeout(h->timeout))
476 return -IPSET_ERR_TIMEOUT;
477 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
480 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
481 ret = adtfn(set, &data, timeout);
482 return ip_set_eexist(ret, flags) ? 0 : ret;
485 port = ntohs(data.port);
486 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
490 for (; port <= port_to; port++) {
491 data.port = htons(port);
492 ret = adtfn(set, &data, timeout);
494 if (ret && !ip_set_eexist(ret, flags))
502 /* Create hash:ip type of sets */
505 hash_ipportnet_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
507 struct ip_set_hash *h;
508 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
511 if (!(set->family == AF_INET || set->family == AF_INET6))
512 return -IPSET_ERR_INVALID_FAMILY;
514 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
515 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
516 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
517 return -IPSET_ERR_PROTOCOL;
519 if (tb[IPSET_ATTR_HASHSIZE]) {
520 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
521 if (hashsize < IPSET_MIMINAL_HASHSIZE)
522 hashsize = IPSET_MIMINAL_HASHSIZE;
525 if (tb[IPSET_ATTR_MAXELEM])
526 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
528 h = kzalloc(sizeof(*h)
529 + sizeof(struct ip_set_hash_nets)
530 * (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
534 h->maxelem = maxelem;
535 get_random_bytes(&h->initval, sizeof(h->initval));
536 h->timeout = IPSET_NO_TIMEOUT;
538 hbits = htable_bits(hashsize);
539 h->table = ip_set_alloc(
540 sizeof(struct htable)
541 + jhash_size(hbits) * sizeof(struct hbucket));
546 h->table->htable_bits = hbits;
550 if (tb[IPSET_ATTR_TIMEOUT]) {
551 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
553 set->variant = set->family == AF_INET
554 ? &hash_ipportnet4_tvariant
555 : &hash_ipportnet6_tvariant;
557 if (set->family == AF_INET)
558 hash_ipportnet4_gc_init(set);
560 hash_ipportnet6_gc_init(set);
562 set->variant = set->family == AF_INET
563 ? &hash_ipportnet4_variant : &hash_ipportnet6_variant;
566 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
567 set->name, jhash_size(h->table->htable_bits),
568 h->table->htable_bits, h->maxelem, set->data, h->table);
573 static struct ip_set_type hash_ipportnet_type __read_mostly = {
574 .name = "hash:ip,port,net",
575 .protocol = IPSET_PROTOCOL,
576 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
577 .dimension = IPSET_DIM_THREE,
580 .create = hash_ipportnet_create,
582 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
583 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
584 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
585 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
586 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
589 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
590 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
591 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
592 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
593 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
594 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
595 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
596 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
597 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
598 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
604 hash_ipportnet_init(void)
606 return ip_set_type_register(&hash_ipportnet_type);
610 hash_ipportnet_fini(void)
612 ip_set_type_unregister(&hash_ipportnet_type);
615 module_init(hash_ipportnet_init);
616 module_exit(hash_ipportnet_fini);