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 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 type of IP sets");
31 MODULE_ALIAS("ip_set_hash:ip,port");
33 /* Type specific function prefix */
34 #define TYPE hash_ipport
37 hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b);
39 #define hash_ipport4_same_set hash_ipport_same_set
40 #define hash_ipport6_same_set hash_ipport_same_set
42 /* The type variant functions: IPv4 */
44 /* Member elements without timeout */
45 struct hash_ipport4_elem {
52 /* Member elements with timeout support */
53 struct hash_ipport4_telem {
58 unsigned long timeout;
62 hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
63 const struct hash_ipport4_elem *ip2)
65 return ip1->ip == ip2->ip &&
66 ip1->port == ip2->port &&
67 ip1->proto == ip2->proto;
71 hash_ipport4_data_isnull(const struct hash_ipport4_elem *elem)
73 return elem->proto == 0;
77 hash_ipport4_data_copy(struct hash_ipport4_elem *dst,
78 const struct hash_ipport4_elem *src)
81 dst->port = src->port;
82 dst->proto = src->proto;
86 hash_ipport4_data_zero_out(struct hash_ipport4_elem *elem)
92 hash_ipport4_data_list(struct sk_buff *skb,
93 const struct hash_ipport4_elem *data)
95 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
96 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
97 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
105 hash_ipport4_data_tlist(struct sk_buff *skb,
106 const struct hash_ipport4_elem *data)
108 const struct hash_ipport4_telem *tdata =
109 (const struct hash_ipport4_telem *)data;
111 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
112 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
113 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
114 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
115 htonl(ip_set_timeout_get(tdata->timeout)));
125 #include <linux/netfilter/ipset/ip_set_ahash.h>
128 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
129 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
131 const struct ip_set_hash *h = set->data;
132 ipset_adtfn adtfn = set->variant->adt[adt];
133 struct hash_ipport4_elem data = { };
135 if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
136 &data.port, &data.proto))
139 ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
141 return adtfn(set, &data, h->timeout);
145 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
146 enum ipset_adt adt, u32 *lineno, u32 flags)
148 const struct ip_set_hash *h = set->data;
149 ipset_adtfn adtfn = set->variant->adt[adt];
150 struct hash_ipport4_elem data = { };
151 u32 ip, ip_to, p, port, port_to;
152 u32 timeout = h->timeout;
155 if (unlikely(!tb[IPSET_ATTR_IP] ||
156 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
157 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
158 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
159 return -IPSET_ERR_PROTOCOL;
161 if (tb[IPSET_ATTR_LINENO])
162 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
164 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
168 if (tb[IPSET_ATTR_PORT])
169 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
171 return -IPSET_ERR_PROTOCOL;
173 if (tb[IPSET_ATTR_PROTO]) {
174 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
177 return -IPSET_ERR_INVALID_PROTO;
179 return -IPSET_ERR_MISSING_PROTO;
181 switch (data.proto) {
191 if (tb[IPSET_ATTR_TIMEOUT]) {
192 if (!with_timeout(h->timeout))
193 return -IPSET_ERR_TIMEOUT;
194 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
197 if (adt == IPSET_TEST ||
198 !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
199 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
200 tb[IPSET_ATTR_PORT_TO])) {
201 ret = adtfn(set, &data, timeout);
202 return ip_set_eexist(ret, flags) ? 0 : ret;
206 if (tb[IPSET_ATTR_IP_TO]) {
207 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
212 } else if (tb[IPSET_ATTR_CIDR]) {
213 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
216 return -IPSET_ERR_INVALID_CIDR;
217 ip &= ip_set_hostmask(cidr);
218 ip_to = ip | ~ip_set_hostmask(cidr);
222 port = ntohs(data.port);
223 if (tb[IPSET_ATTR_PORT_TO]) {
224 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
230 for (; !before(ip_to, ip); ip++)
231 for (p = port; p <= port_to; p++) {
233 data.port = htons(p);
234 ret = adtfn(set, &data, timeout);
236 if (ret && !ip_set_eexist(ret, flags))
245 hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b)
247 const struct ip_set_hash *x = a->data;
248 const struct ip_set_hash *y = b->data;
250 /* Resizing changes htable_bits, so we ignore it */
251 return x->maxelem == y->maxelem &&
252 x->timeout == y->timeout;
255 /* The type variant functions: IPv6 */
257 struct hash_ipport6_elem {
258 union nf_inet_addr ip;
264 struct hash_ipport6_telem {
265 union nf_inet_addr ip;
269 unsigned long timeout;
273 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
274 const struct hash_ipport6_elem *ip2)
276 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
277 ip1->port == ip2->port &&
278 ip1->proto == ip2->proto;
282 hash_ipport6_data_isnull(const struct hash_ipport6_elem *elem)
284 return elem->proto == 0;
288 hash_ipport6_data_copy(struct hash_ipport6_elem *dst,
289 const struct hash_ipport6_elem *src)
291 memcpy(dst, src, sizeof(*dst));
295 hash_ipport6_data_zero_out(struct hash_ipport6_elem *elem)
301 hash_ipport6_data_list(struct sk_buff *skb,
302 const struct hash_ipport6_elem *data)
304 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
305 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
306 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
314 hash_ipport6_data_tlist(struct sk_buff *skb,
315 const struct hash_ipport6_elem *data)
317 const struct hash_ipport6_telem *e =
318 (const struct hash_ipport6_telem *)data;
320 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
321 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
322 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
323 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
324 htonl(ip_set_timeout_get(e->timeout)));
335 #define HOST_MASK 128
336 #include <linux/netfilter/ipset/ip_set_ahash.h>
339 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
340 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
342 const struct ip_set_hash *h = set->data;
343 ipset_adtfn adtfn = set->variant->adt[adt];
344 struct hash_ipport6_elem data = { };
346 if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
347 &data.port, &data.proto))
350 ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
352 return adtfn(set, &data, h->timeout);
356 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
357 enum ipset_adt adt, u32 *lineno, u32 flags)
359 const struct ip_set_hash *h = set->data;
360 ipset_adtfn adtfn = set->variant->adt[adt];
361 struct hash_ipport6_elem data = { };
363 u32 timeout = h->timeout;
366 if (unlikely(!tb[IPSET_ATTR_IP] ||
367 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
368 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
369 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
370 tb[IPSET_ATTR_IP_TO] ||
371 tb[IPSET_ATTR_CIDR]))
372 return -IPSET_ERR_PROTOCOL;
374 if (tb[IPSET_ATTR_LINENO])
375 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
377 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
381 if (tb[IPSET_ATTR_PORT])
382 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
384 return -IPSET_ERR_PROTOCOL;
386 if (tb[IPSET_ATTR_PROTO]) {
387 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
390 return -IPSET_ERR_INVALID_PROTO;
392 return -IPSET_ERR_MISSING_PROTO;
394 switch (data.proto) {
404 if (tb[IPSET_ATTR_TIMEOUT]) {
405 if (!with_timeout(h->timeout))
406 return -IPSET_ERR_TIMEOUT;
407 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
410 if (adt == IPSET_TEST ||
411 !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
412 !tb[IPSET_ATTR_PORT_TO]) {
413 ret = adtfn(set, &data, timeout);
414 return ip_set_eexist(ret, flags) ? 0 : ret;
417 port = ntohs(data.port);
418 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
422 for (; port <= port_to; port++) {
423 data.port = htons(port);
424 ret = adtfn(set, &data, timeout);
426 if (ret && !ip_set_eexist(ret, flags))
434 /* Create hash:ip type of sets */
437 hash_ipport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
439 struct ip_set_hash *h;
440 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
443 if (!(set->family == AF_INET || set->family == AF_INET6))
444 return -IPSET_ERR_INVALID_FAMILY;
446 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
447 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
448 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
449 return -IPSET_ERR_PROTOCOL;
451 if (tb[IPSET_ATTR_HASHSIZE]) {
452 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
453 if (hashsize < IPSET_MIMINAL_HASHSIZE)
454 hashsize = IPSET_MIMINAL_HASHSIZE;
457 if (tb[IPSET_ATTR_MAXELEM])
458 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
460 h = kzalloc(sizeof(*h), GFP_KERNEL);
464 h->maxelem = maxelem;
465 get_random_bytes(&h->initval, sizeof(h->initval));
466 h->timeout = IPSET_NO_TIMEOUT;
468 hbits = htable_bits(hashsize);
469 h->table = ip_set_alloc(
470 sizeof(struct htable)
471 + jhash_size(hbits) * sizeof(struct hbucket));
476 h->table->htable_bits = hbits;
480 if (tb[IPSET_ATTR_TIMEOUT]) {
481 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
483 set->variant = set->family == AF_INET
484 ? &hash_ipport4_tvariant : &hash_ipport6_tvariant;
486 if (set->family == AF_INET)
487 hash_ipport4_gc_init(set);
489 hash_ipport6_gc_init(set);
491 set->variant = set->family == AF_INET
492 ? &hash_ipport4_variant : &hash_ipport6_variant;
495 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
496 set->name, jhash_size(h->table->htable_bits),
497 h->table->htable_bits, h->maxelem, set->data, h->table);
502 static struct ip_set_type hash_ipport_type __read_mostly = {
503 .name = "hash:ip,port",
504 .protocol = IPSET_PROTOCOL,
505 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
506 .dimension = IPSET_DIM_TWO,
509 .create = hash_ipport_create,
511 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
512 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
513 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
514 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
515 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
516 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
519 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
520 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
521 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
522 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
523 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
524 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
525 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
526 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
532 hash_ipport_init(void)
534 return ip_set_type_register(&hash_ipport_type);
538 hash_ipport_fini(void)
540 ip_set_type_unregister(&hash_ipport_type);
543 module_init(hash_ipport_init);
544 module_exit(hash_ipport_fini);