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);
149 h->next.ip2 = ntohl(d->ip2);
153 hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
154 const struct xt_action_param *par,
155 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
157 const struct ip_set_hash *h = set->data;
158 ipset_adtfn adtfn = set->variant->adt[adt];
159 struct hash_ipportnet4_elem data =
160 { .cidr = h->nets[0].cidr || HOST_MASK };
164 if (adt == IPSET_TEST)
165 data.cidr = HOST_MASK;
167 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
168 &data.port, &data.proto))
171 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
172 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2);
173 data.ip2 &= ip_set_netmask(data.cidr);
175 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
179 hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
180 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
182 const struct ip_set_hash *h = set->data;
183 ipset_adtfn adtfn = set->variant->adt[adt];
184 struct hash_ipportnet4_elem data = { .cidr = HOST_MASK };
185 u32 ip, ip_to, p = 0, port, port_to;
186 u32 ip2_from = 0, ip2_to, ip2_last, ip2;
187 u32 timeout = h->timeout;
188 bool with_ports = false;
191 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
192 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
193 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
194 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
195 return -IPSET_ERR_PROTOCOL;
197 if (tb[IPSET_ATTR_LINENO])
198 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
200 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
204 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
208 if (tb[IPSET_ATTR_CIDR2]) {
209 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
211 return -IPSET_ERR_INVALID_CIDR;
214 if (tb[IPSET_ATTR_PORT])
215 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
217 return -IPSET_ERR_PROTOCOL;
219 if (tb[IPSET_ATTR_PROTO]) {
220 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
221 with_ports = ip_set_proto_with_ports(data.proto);
224 return -IPSET_ERR_INVALID_PROTO;
226 return -IPSET_ERR_MISSING_PROTO;
228 if (!(with_ports || data.proto == IPPROTO_ICMP))
231 if (tb[IPSET_ATTR_TIMEOUT]) {
232 if (!with_timeout(h->timeout))
233 return -IPSET_ERR_TIMEOUT;
234 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
237 with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
238 if (adt == IPSET_TEST ||
239 !(tb[IPSET_ATTR_CIDR] || tb[IPSET_ATTR_IP_TO] || with_ports ||
240 tb[IPSET_ATTR_IP2_TO])) {
242 data.ip2 = htonl(ip2_from & ip_set_hostmask(data.cidr));
243 ret = adtfn(set, &data, timeout, flags);
244 return ip_set_eexist(ret, flags) ? 0 : ret;
247 if (tb[IPSET_ATTR_IP_TO]) {
248 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
253 } else if (tb[IPSET_ATTR_CIDR]) {
254 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
257 return -IPSET_ERR_INVALID_CIDR;
258 ip_set_mask_from_to(ip, ip_to, cidr);
261 port_to = port = ntohs(data.port);
262 if (tb[IPSET_ATTR_PORT_TO]) {
263 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
267 if (tb[IPSET_ATTR_IP2_TO]) {
268 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
271 if (ip2_from > ip2_to)
272 swap(ip2_from, ip2_to);
273 if (ip2_from + UINT_MAX == ip2_to)
274 return -IPSET_ERR_HASH_RANGE;
276 ip_set_mask_from_to(ip2_from, ip2_to, data.cidr);
281 for (; !before(ip_to, ip); ip++) {
283 p = retried && ip == h->next.ip ? h->next.port : port;
284 for (; p <= port_to; p++) {
285 data.port = htons(p);
286 ip2 = retried && ip == h->next.ip && p == h->next.port
287 ? h->next.ip2 : ip2_from;
288 while (!after(ip2, ip2_to)) {
289 data.ip2 = htonl(ip2);
290 ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
292 ret = adtfn(set, &data, timeout, flags);
294 if (ret && !ip_set_eexist(ret, flags))
306 hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b)
308 const struct ip_set_hash *x = a->data;
309 const struct ip_set_hash *y = b->data;
311 /* Resizing changes htable_bits, so we ignore it */
312 return x->maxelem == y->maxelem &&
313 x->timeout == y->timeout;
316 /* The type variant functions: IPv6 */
318 struct hash_ipportnet6_elem {
319 union nf_inet_addr ip;
320 union nf_inet_addr ip2;
326 struct hash_ipportnet6_telem {
327 union nf_inet_addr ip;
328 union nf_inet_addr ip2;
332 unsigned long timeout;
336 hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1,
337 const struct hash_ipportnet6_elem *ip2)
339 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
340 ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
341 ip1->cidr == ip2->cidr &&
342 ip1->port == ip2->port &&
343 ip1->proto == ip2->proto;
347 hash_ipportnet6_data_isnull(const struct hash_ipportnet6_elem *elem)
349 return elem->proto == 0;
353 hash_ipportnet6_data_copy(struct hash_ipportnet6_elem *dst,
354 const struct hash_ipportnet6_elem *src)
356 memcpy(dst, src, sizeof(*dst));
360 hash_ipportnet6_data_zero_out(struct hash_ipportnet6_elem *elem)
366 ip6_netmask(union nf_inet_addr *ip, u8 prefix)
368 ip->ip6[0] &= ip_set_netmask6(prefix)[0];
369 ip->ip6[1] &= ip_set_netmask6(prefix)[1];
370 ip->ip6[2] &= ip_set_netmask6(prefix)[2];
371 ip->ip6[3] &= ip_set_netmask6(prefix)[3];
375 hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr)
377 ip6_netmask(&elem->ip2, cidr);
382 hash_ipportnet6_data_list(struct sk_buff *skb,
383 const struct hash_ipportnet6_elem *data)
385 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
386 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
387 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
388 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
389 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
397 hash_ipportnet6_data_tlist(struct sk_buff *skb,
398 const struct hash_ipportnet6_elem *data)
400 const struct hash_ipportnet6_telem *e =
401 (const struct hash_ipportnet6_telem *)data;
403 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
404 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
405 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
406 NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
407 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
408 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
409 htonl(ip_set_timeout_get(e->timeout)));
420 #define HOST_MASK 128
421 #include <linux/netfilter/ipset/ip_set_ahash.h>
424 hash_ipportnet6_data_next(struct ip_set_hash *h,
425 const struct hash_ipportnet6_elem *d)
427 h->next.port = ntohs(d->port);
431 hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
432 const struct xt_action_param *par,
433 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
435 const struct ip_set_hash *h = set->data;
436 ipset_adtfn adtfn = set->variant->adt[adt];
437 struct hash_ipportnet6_elem data =
438 { .cidr = h->nets[0].cidr || HOST_MASK };
442 if (adt == IPSET_TEST)
443 data.cidr = HOST_MASK;
445 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
446 &data.port, &data.proto))
449 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
450 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
451 ip6_netmask(&data.ip2, data.cidr);
453 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
457 hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
458 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
460 const struct ip_set_hash *h = set->data;
461 ipset_adtfn adtfn = set->variant->adt[adt];
462 struct hash_ipportnet6_elem data = { .cidr = HOST_MASK };
464 u32 timeout = h->timeout;
465 bool with_ports = false;
468 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
469 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
470 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
471 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
472 tb[IPSET_ATTR_IP_TO] ||
473 tb[IPSET_ATTR_CIDR]))
474 return -IPSET_ERR_PROTOCOL;
475 if (unlikely(tb[IPSET_ATTR_IP_TO]))
476 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
478 if (tb[IPSET_ATTR_LINENO])
479 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
481 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
485 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
489 if (tb[IPSET_ATTR_CIDR2])
490 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
493 return -IPSET_ERR_INVALID_CIDR;
495 ip6_netmask(&data.ip2, data.cidr);
497 if (tb[IPSET_ATTR_PORT])
498 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
500 return -IPSET_ERR_PROTOCOL;
502 if (tb[IPSET_ATTR_PROTO]) {
503 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
504 with_ports = ip_set_proto_with_ports(data.proto);
507 return -IPSET_ERR_INVALID_PROTO;
509 return -IPSET_ERR_MISSING_PROTO;
511 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
514 if (tb[IPSET_ATTR_TIMEOUT]) {
515 if (!with_timeout(h->timeout))
516 return -IPSET_ERR_TIMEOUT;
517 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
520 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
521 ret = adtfn(set, &data, timeout, flags);
522 return ip_set_eexist(ret, flags) ? 0 : ret;
525 port = ntohs(data.port);
526 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
532 for (; port <= port_to; port++) {
533 data.port = htons(port);
534 ret = adtfn(set, &data, timeout, flags);
536 if (ret && !ip_set_eexist(ret, flags))
544 /* Create hash:ip type of sets */
547 hash_ipportnet_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
549 struct ip_set_hash *h;
550 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
553 if (!(set->family == AF_INET || set->family == AF_INET6))
554 return -IPSET_ERR_INVALID_FAMILY;
556 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
557 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
558 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
559 return -IPSET_ERR_PROTOCOL;
561 if (tb[IPSET_ATTR_HASHSIZE]) {
562 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
563 if (hashsize < IPSET_MIMINAL_HASHSIZE)
564 hashsize = IPSET_MIMINAL_HASHSIZE;
567 if (tb[IPSET_ATTR_MAXELEM])
568 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
570 h = kzalloc(sizeof(*h)
571 + sizeof(struct ip_set_hash_nets)
572 * (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
576 h->maxelem = maxelem;
577 get_random_bytes(&h->initval, sizeof(h->initval));
578 h->timeout = IPSET_NO_TIMEOUT;
580 hbits = htable_bits(hashsize);
581 h->table = ip_set_alloc(
582 sizeof(struct htable)
583 + jhash_size(hbits) * sizeof(struct hbucket));
588 h->table->htable_bits = hbits;
592 if (tb[IPSET_ATTR_TIMEOUT]) {
593 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
595 set->variant = set->family == AF_INET
596 ? &hash_ipportnet4_tvariant
597 : &hash_ipportnet6_tvariant;
599 if (set->family == AF_INET)
600 hash_ipportnet4_gc_init(set);
602 hash_ipportnet6_gc_init(set);
604 set->variant = set->family == AF_INET
605 ? &hash_ipportnet4_variant : &hash_ipportnet6_variant;
608 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
609 set->name, jhash_size(h->table->htable_bits),
610 h->table->htable_bits, h->maxelem, set->data, h->table);
615 static struct ip_set_type hash_ipportnet_type __read_mostly = {
616 .name = "hash:ip,port,net",
617 .protocol = IPSET_PROTOCOL,
618 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
619 .dimension = IPSET_DIM_THREE,
622 /* 1 SCTP and UDPLITE support added */
623 .revision_max = 2, /* Range as input support for IPv4 added */
624 .create = hash_ipportnet_create,
626 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
627 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
628 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
629 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
630 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
633 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
634 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
635 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
636 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
637 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
638 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
639 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
640 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
641 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
642 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
643 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
649 hash_ipportnet_init(void)
651 return ip_set_type_register(&hash_ipportnet_type);
655 hash_ipportnet_fini(void)
657 ip_set_type_unregister(&hash_ipportnet_type);
660 module_init(hash_ipportnet_init);
661 module_exit(hash_ipportnet_fini);