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,ip 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,ip type of IP sets");
31 MODULE_ALIAS("ip_set_hash:ip,port,ip");
33 /* Type specific function prefix */
34 #define TYPE hash_ipportip
37 hash_ipportip_same_set(const struct ip_set *a, const struct ip_set *b);
39 #define hash_ipportip4_same_set hash_ipportip_same_set
40 #define hash_ipportip6_same_set hash_ipportip_same_set
42 /* The type variant functions: IPv4 */
44 /* Member elements without timeout */
45 struct hash_ipportip4_elem {
53 /* Member elements with timeout support */
54 struct hash_ipportip4_telem {
60 unsigned long timeout;
64 hash_ipportip4_data_equal(const struct hash_ipportip4_elem *ip1,
65 const struct hash_ipportip4_elem *ip2)
67 return ip1->ip == ip2->ip &&
68 ip1->ip2 == ip2->ip2 &&
69 ip1->port == ip2->port &&
70 ip1->proto == ip2->proto;
74 hash_ipportip4_data_isnull(const struct hash_ipportip4_elem *elem)
76 return elem->proto == 0;
80 hash_ipportip4_data_copy(struct hash_ipportip4_elem *dst,
81 const struct hash_ipportip4_elem *src)
83 memcpy(dst, src, sizeof(*dst));
87 hash_ipportip4_data_zero_out(struct hash_ipportip4_elem *elem)
93 hash_ipportip4_data_list(struct sk_buff *skb,
94 const struct hash_ipportip4_elem *data)
96 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
97 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, data->ip2);
98 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
99 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
107 hash_ipportip4_data_tlist(struct sk_buff *skb,
108 const struct hash_ipportip4_elem *data)
110 const struct hash_ipportip4_telem *tdata =
111 (const struct hash_ipportip4_telem *)data;
113 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
114 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, tdata->ip2);
115 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
116 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
117 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
118 htonl(ip_set_timeout_get(tdata->timeout)));
128 #include <linux/netfilter/ipset/ip_set_ahash.h>
131 hash_ipportip4_data_next(struct ip_set_hash *h,
132 const struct hash_ipportip4_elem *d)
134 h->next.ip = ntohl(d->ip);
135 h->next.port = ntohs(d->port);
139 hash_ipportip4_kadt(struct ip_set *set, const struct sk_buff *skb,
140 const struct xt_action_param *par,
141 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
143 const struct ip_set_hash *h = set->data;
144 ipset_adtfn adtfn = set->variant->adt[adt];
145 struct hash_ipportip4_elem data = { };
147 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
148 &data.port, &data.proto))
151 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
152 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2);
154 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
158 hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
159 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
161 const struct ip_set_hash *h = set->data;
162 ipset_adtfn adtfn = set->variant->adt[adt];
163 struct hash_ipportip4_elem data = { };
164 u32 ip, ip_to, p = 0, port, port_to;
165 u32 timeout = h->timeout;
166 bool with_ports = false;
169 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
170 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
171 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
172 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
173 return -IPSET_ERR_PROTOCOL;
175 if (tb[IPSET_ATTR_LINENO])
176 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
178 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
182 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &data.ip2);
186 if (tb[IPSET_ATTR_PORT])
187 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
189 return -IPSET_ERR_PROTOCOL;
191 if (tb[IPSET_ATTR_PROTO]) {
192 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
193 with_ports = ip_set_proto_with_ports(data.proto);
196 return -IPSET_ERR_INVALID_PROTO;
198 return -IPSET_ERR_MISSING_PROTO;
200 if (!(with_ports || data.proto == IPPROTO_ICMP))
203 if (tb[IPSET_ATTR_TIMEOUT]) {
204 if (!with_timeout(h->timeout))
205 return -IPSET_ERR_TIMEOUT;
206 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
209 if (adt == IPSET_TEST ||
210 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
211 tb[IPSET_ATTR_PORT_TO])) {
212 ret = adtfn(set, &data, timeout, flags);
213 return ip_set_eexist(ret, flags) ? 0 : ret;
217 if (tb[IPSET_ATTR_IP_TO]) {
218 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
223 } else if (tb[IPSET_ATTR_CIDR]) {
224 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
227 return -IPSET_ERR_INVALID_CIDR;
228 ip_set_mask_from_to(ip, ip_to, cidr);
232 port_to = port = ntohs(data.port);
233 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
234 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
241 for (; !before(ip_to, ip); ip++) {
242 p = retried && ip == h->next.ip ? h->next.port : port;
243 for (; p <= port_to; p++) {
245 data.port = htons(p);
246 ret = adtfn(set, &data, timeout, flags);
248 if (ret && !ip_set_eexist(ret, flags))
258 hash_ipportip_same_set(const struct ip_set *a, const struct ip_set *b)
260 const struct ip_set_hash *x = a->data;
261 const struct ip_set_hash *y = b->data;
263 /* Resizing changes htable_bits, so we ignore it */
264 return x->maxelem == y->maxelem &&
265 x->timeout == y->timeout;
268 /* The type variant functions: IPv6 */
270 struct hash_ipportip6_elem {
271 union nf_inet_addr ip;
272 union nf_inet_addr ip2;
278 struct hash_ipportip6_telem {
279 union nf_inet_addr ip;
280 union nf_inet_addr ip2;
284 unsigned long timeout;
288 hash_ipportip6_data_equal(const struct hash_ipportip6_elem *ip1,
289 const struct hash_ipportip6_elem *ip2)
291 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
292 ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
293 ip1->port == ip2->port &&
294 ip1->proto == ip2->proto;
298 hash_ipportip6_data_isnull(const struct hash_ipportip6_elem *elem)
300 return elem->proto == 0;
304 hash_ipportip6_data_copy(struct hash_ipportip6_elem *dst,
305 const struct hash_ipportip6_elem *src)
307 memcpy(dst, src, sizeof(*dst));
311 hash_ipportip6_data_zero_out(struct hash_ipportip6_elem *elem)
317 hash_ipportip6_data_list(struct sk_buff *skb,
318 const struct hash_ipportip6_elem *data)
320 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
321 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
322 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
323 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
331 hash_ipportip6_data_tlist(struct sk_buff *skb,
332 const struct hash_ipportip6_elem *data)
334 const struct hash_ipportip6_telem *e =
335 (const struct hash_ipportip6_telem *)data;
337 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
338 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
339 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
340 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
341 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
342 htonl(ip_set_timeout_get(e->timeout)));
353 #define HOST_MASK 128
354 #include <linux/netfilter/ipset/ip_set_ahash.h>
357 hash_ipportip6_data_next(struct ip_set_hash *h,
358 const struct hash_ipportip6_elem *d)
360 h->next.port = ntohs(d->port);
364 hash_ipportip6_kadt(struct ip_set *set, const struct sk_buff *skb,
365 const struct xt_action_param *par,
366 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
368 const struct ip_set_hash *h = set->data;
369 ipset_adtfn adtfn = set->variant->adt[adt];
370 struct hash_ipportip6_elem data = { };
372 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
373 &data.port, &data.proto))
376 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
377 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
379 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
383 hash_ipportip6_uadt(struct ip_set *set, struct nlattr *tb[],
384 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
386 const struct ip_set_hash *h = set->data;
387 ipset_adtfn adtfn = set->variant->adt[adt];
388 struct hash_ipportip6_elem data = { };
390 u32 timeout = h->timeout;
391 bool with_ports = false;
394 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
395 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
396 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
397 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
398 tb[IPSET_ATTR_IP_TO] ||
399 tb[IPSET_ATTR_CIDR]))
400 return -IPSET_ERR_PROTOCOL;
402 if (tb[IPSET_ATTR_LINENO])
403 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
405 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
409 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
413 if (tb[IPSET_ATTR_PORT])
414 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
416 return -IPSET_ERR_PROTOCOL;
418 if (tb[IPSET_ATTR_PROTO]) {
419 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
420 with_ports = ip_set_proto_with_ports(data.proto);
423 return -IPSET_ERR_INVALID_PROTO;
425 return -IPSET_ERR_MISSING_PROTO;
427 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
430 if (tb[IPSET_ATTR_TIMEOUT]) {
431 if (!with_timeout(h->timeout))
432 return -IPSET_ERR_TIMEOUT;
433 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
436 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
437 ret = adtfn(set, &data, timeout, flags);
438 return ip_set_eexist(ret, flags) ? 0 : ret;
441 port = ntohs(data.port);
442 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
448 for (; port <= port_to; port++) {
449 data.port = htons(port);
450 ret = adtfn(set, &data, timeout, flags);
452 if (ret && !ip_set_eexist(ret, flags))
460 /* Create hash:ip type of sets */
463 hash_ipportip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
465 struct ip_set_hash *h;
466 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
469 if (!(set->family == AF_INET || set->family == AF_INET6))
470 return -IPSET_ERR_INVALID_FAMILY;
472 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
473 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
474 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
475 return -IPSET_ERR_PROTOCOL;
477 if (tb[IPSET_ATTR_HASHSIZE]) {
478 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
479 if (hashsize < IPSET_MIMINAL_HASHSIZE)
480 hashsize = IPSET_MIMINAL_HASHSIZE;
483 if (tb[IPSET_ATTR_MAXELEM])
484 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
486 h = kzalloc(sizeof(*h), GFP_KERNEL);
490 h->maxelem = maxelem;
491 get_random_bytes(&h->initval, sizeof(h->initval));
492 h->timeout = IPSET_NO_TIMEOUT;
494 hbits = htable_bits(hashsize);
495 h->table = ip_set_alloc(
496 sizeof(struct htable)
497 + jhash_size(hbits) * sizeof(struct hbucket));
502 h->table->htable_bits = hbits;
506 if (tb[IPSET_ATTR_TIMEOUT]) {
507 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
509 set->variant = set->family == AF_INET
510 ? &hash_ipportip4_tvariant : &hash_ipportip6_tvariant;
512 if (set->family == AF_INET)
513 hash_ipportip4_gc_init(set);
515 hash_ipportip6_gc_init(set);
517 set->variant = set->family == AF_INET
518 ? &hash_ipportip4_variant : &hash_ipportip6_variant;
521 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
522 set->name, jhash_size(h->table->htable_bits),
523 h->table->htable_bits, h->maxelem, set->data, h->table);
528 static struct ip_set_type hash_ipportip_type __read_mostly = {
529 .name = "hash:ip,port,ip",
530 .protocol = IPSET_PROTOCOL,
531 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
532 .dimension = IPSET_DIM_THREE,
535 .revision_max = 1, /* SCTP and UDPLITE support added */
536 .create = hash_ipportip_create,
538 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
539 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
540 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
541 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
542 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
545 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
546 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
547 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
548 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
549 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
550 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
551 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
552 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
553 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
559 hash_ipportip_init(void)
561 return ip_set_type_register(&hash_ipportip_type);
565 hash_ipportip_fini(void)
567 ip_set_type_unregister(&hash_ipportip_type);
570 module_init(hash_ipportip_init);
571 module_exit(hash_ipportip_fini);