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_data_next(struct ip_set_hash *h,
145 const struct hash_ipportnet4_elem *d)
147 h->next.ip = ntohl(d->ip);
148 h->next.port = ntohs(d->port);
152 hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
153 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
155 const struct ip_set_hash *h = set->data;
156 ipset_adtfn adtfn = set->variant->adt[adt];
157 struct hash_ipportnet4_elem data =
158 { .cidr = h->nets[0].cidr || HOST_MASK };
162 if (adt == IPSET_TEST)
163 data.cidr = HOST_MASK;
165 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
166 &data.port, &data.proto))
169 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
170 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2);
171 data.ip2 &= ip_set_netmask(data.cidr);
173 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
177 hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
178 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
180 const struct ip_set_hash *h = set->data;
181 ipset_adtfn adtfn = set->variant->adt[adt];
182 struct hash_ipportnet4_elem data = { .cidr = HOST_MASK };
183 u32 ip, ip_to, p = 0, port, port_to;
184 u32 timeout = h->timeout;
185 bool with_ports = false;
188 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
189 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
190 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
191 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
192 return -IPSET_ERR_PROTOCOL;
194 if (tb[IPSET_ATTR_LINENO])
195 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
197 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
201 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &data.ip2);
205 if (tb[IPSET_ATTR_CIDR2])
206 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
209 return -IPSET_ERR_INVALID_CIDR;
211 data.ip2 &= ip_set_netmask(data.cidr);
213 if (tb[IPSET_ATTR_PORT])
214 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
216 return -IPSET_ERR_PROTOCOL;
218 if (tb[IPSET_ATTR_PROTO]) {
219 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
220 with_ports = ip_set_proto_with_ports(data.proto);
223 return -IPSET_ERR_INVALID_PROTO;
225 return -IPSET_ERR_MISSING_PROTO;
227 if (!(with_ports || data.proto == IPPROTO_ICMP))
230 if (tb[IPSET_ATTR_TIMEOUT]) {
231 if (!with_timeout(h->timeout))
232 return -IPSET_ERR_TIMEOUT;
233 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
236 if (adt == IPSET_TEST ||
237 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
238 tb[IPSET_ATTR_PORT_TO])) {
239 ret = adtfn(set, &data, timeout, flags);
240 return ip_set_eexist(ret, flags) ? 0 : ret;
244 if (tb[IPSET_ATTR_IP_TO]) {
245 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
250 } else if (tb[IPSET_ATTR_CIDR]) {
251 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
254 return -IPSET_ERR_INVALID_CIDR;
255 ip &= ip_set_hostmask(cidr);
256 ip_to = ip | ~ip_set_hostmask(cidr);
260 port_to = port = ntohs(data.port);
261 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
262 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
269 for (; !before(ip_to, ip); ip++) {
270 p = retried && ip == h->next.ip ? h->next.port : port;
271 for (; p <= port_to; p++) {
273 data.port = htons(p);
274 ret = adtfn(set, &data, timeout, flags);
276 if (ret && !ip_set_eexist(ret, flags))
286 hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b)
288 const struct ip_set_hash *x = a->data;
289 const struct ip_set_hash *y = b->data;
291 /* Resizing changes htable_bits, so we ignore it */
292 return x->maxelem == y->maxelem &&
293 x->timeout == y->timeout;
296 /* The type variant functions: IPv6 */
298 struct hash_ipportnet6_elem {
299 union nf_inet_addr ip;
300 union nf_inet_addr ip2;
306 struct hash_ipportnet6_telem {
307 union nf_inet_addr ip;
308 union nf_inet_addr ip2;
312 unsigned long timeout;
316 hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1,
317 const struct hash_ipportnet6_elem *ip2)
319 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
320 ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
321 ip1->cidr == ip2->cidr &&
322 ip1->port == ip2->port &&
323 ip1->proto == ip2->proto;
327 hash_ipportnet6_data_isnull(const struct hash_ipportnet6_elem *elem)
329 return elem->proto == 0;
333 hash_ipportnet6_data_copy(struct hash_ipportnet6_elem *dst,
334 const struct hash_ipportnet6_elem *src)
336 memcpy(dst, src, sizeof(*dst));
340 hash_ipportnet6_data_zero_out(struct hash_ipportnet6_elem *elem)
346 ip6_netmask(union nf_inet_addr *ip, u8 prefix)
348 ip->ip6[0] &= ip_set_netmask6(prefix)[0];
349 ip->ip6[1] &= ip_set_netmask6(prefix)[1];
350 ip->ip6[2] &= ip_set_netmask6(prefix)[2];
351 ip->ip6[3] &= ip_set_netmask6(prefix)[3];
355 hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr)
357 ip6_netmask(&elem->ip2, cidr);
362 hash_ipportnet6_data_list(struct sk_buff *skb,
363 const struct hash_ipportnet6_elem *data)
365 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
366 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
367 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
368 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
369 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
377 hash_ipportnet6_data_tlist(struct sk_buff *skb,
378 const struct hash_ipportnet6_elem *data)
380 const struct hash_ipportnet6_telem *e =
381 (const struct hash_ipportnet6_telem *)data;
383 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
384 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
385 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
386 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
387 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
388 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
389 htonl(ip_set_timeout_get(e->timeout)));
400 #define HOST_MASK 128
401 #include <linux/netfilter/ipset/ip_set_ahash.h>
404 hash_ipportnet6_data_next(struct ip_set_hash *h,
405 const struct hash_ipportnet6_elem *d)
407 h->next.port = ntohs(d->port);
411 hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
412 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
414 const struct ip_set_hash *h = set->data;
415 ipset_adtfn adtfn = set->variant->adt[adt];
416 struct hash_ipportnet6_elem data =
417 { .cidr = h->nets[0].cidr || HOST_MASK };
421 if (adt == IPSET_TEST)
422 data.cidr = HOST_MASK;
424 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
425 &data.port, &data.proto))
428 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
429 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
430 ip6_netmask(&data.ip2, data.cidr);
432 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
436 hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
437 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
439 const struct ip_set_hash *h = set->data;
440 ipset_adtfn adtfn = set->variant->adt[adt];
441 struct hash_ipportnet6_elem data = { .cidr = HOST_MASK };
443 u32 timeout = h->timeout;
444 bool with_ports = false;
447 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
448 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
449 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
450 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
451 tb[IPSET_ATTR_IP_TO] ||
452 tb[IPSET_ATTR_CIDR]))
453 return -IPSET_ERR_PROTOCOL;
455 if (tb[IPSET_ATTR_LINENO])
456 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
458 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
462 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
466 if (tb[IPSET_ATTR_CIDR2])
467 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
470 return -IPSET_ERR_INVALID_CIDR;
472 ip6_netmask(&data.ip2, data.cidr);
474 if (tb[IPSET_ATTR_PORT])
475 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
477 return -IPSET_ERR_PROTOCOL;
479 if (tb[IPSET_ATTR_PROTO]) {
480 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
481 with_ports = ip_set_proto_with_ports(data.proto);
484 return -IPSET_ERR_INVALID_PROTO;
486 return -IPSET_ERR_MISSING_PROTO;
488 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
491 if (tb[IPSET_ATTR_TIMEOUT]) {
492 if (!with_timeout(h->timeout))
493 return -IPSET_ERR_TIMEOUT;
494 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
497 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
498 ret = adtfn(set, &data, timeout, flags);
499 return ip_set_eexist(ret, flags) ? 0 : ret;
502 port = ntohs(data.port);
503 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
509 for (; port <= port_to; port++) {
510 data.port = htons(port);
511 ret = adtfn(set, &data, timeout, flags);
513 if (ret && !ip_set_eexist(ret, flags))
521 /* Create hash:ip type of sets */
524 hash_ipportnet_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
526 struct ip_set_hash *h;
527 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
530 if (!(set->family == AF_INET || set->family == AF_INET6))
531 return -IPSET_ERR_INVALID_FAMILY;
533 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
534 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
535 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
536 return -IPSET_ERR_PROTOCOL;
538 if (tb[IPSET_ATTR_HASHSIZE]) {
539 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
540 if (hashsize < IPSET_MIMINAL_HASHSIZE)
541 hashsize = IPSET_MIMINAL_HASHSIZE;
544 if (tb[IPSET_ATTR_MAXELEM])
545 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
547 h = kzalloc(sizeof(*h)
548 + sizeof(struct ip_set_hash_nets)
549 * (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
553 h->maxelem = maxelem;
554 get_random_bytes(&h->initval, sizeof(h->initval));
555 h->timeout = IPSET_NO_TIMEOUT;
557 hbits = htable_bits(hashsize);
558 h->table = ip_set_alloc(
559 sizeof(struct htable)
560 + jhash_size(hbits) * sizeof(struct hbucket));
565 h->table->htable_bits = hbits;
569 if (tb[IPSET_ATTR_TIMEOUT]) {
570 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
572 set->variant = set->family == AF_INET
573 ? &hash_ipportnet4_tvariant
574 : &hash_ipportnet6_tvariant;
576 if (set->family == AF_INET)
577 hash_ipportnet4_gc_init(set);
579 hash_ipportnet6_gc_init(set);
581 set->variant = set->family == AF_INET
582 ? &hash_ipportnet4_variant : &hash_ipportnet6_variant;
585 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
586 set->name, jhash_size(h->table->htable_bits),
587 h->table->htable_bits, h->maxelem, set->data, h->table);
592 static struct ip_set_type hash_ipportnet_type __read_mostly = {
593 .name = "hash:ip,port,net",
594 .protocol = IPSET_PROTOCOL,
595 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
596 .dimension = IPSET_DIM_THREE,
599 .create = hash_ipportnet_create,
601 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
602 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
603 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
604 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
605 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
608 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
609 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
610 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
611 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
612 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
613 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
614 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
615 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
616 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
617 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
623 hash_ipportnet_init(void)
625 return ip_set_type_register(&hash_ipportnet_type);
629 hash_ipportnet_fini(void)
631 ip_set_type_unregister(&hash_ipportnet_type);
634 module_init(hash_ipportnet_init);
635 module_exit(hash_ipportnet_fini);