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;
153 bool with_ports = false;
156 if (unlikely(!tb[IPSET_ATTR_IP] ||
157 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
158 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
159 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
160 return -IPSET_ERR_PROTOCOL;
162 if (tb[IPSET_ATTR_LINENO])
163 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
165 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
169 if (tb[IPSET_ATTR_PORT])
170 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
172 return -IPSET_ERR_PROTOCOL;
174 if (tb[IPSET_ATTR_PROTO]) {
175 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
176 with_ports = ip_set_proto_with_ports(data.proto);
179 return -IPSET_ERR_INVALID_PROTO;
181 return -IPSET_ERR_MISSING_PROTO;
183 if (!(with_ports || data.proto == IPPROTO_ICMP))
186 if (tb[IPSET_ATTR_TIMEOUT]) {
187 if (!with_timeout(h->timeout))
188 return -IPSET_ERR_TIMEOUT;
189 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
192 if (adt == IPSET_TEST ||
193 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
194 tb[IPSET_ATTR_PORT_TO])) {
195 ret = adtfn(set, &data, timeout);
196 return ip_set_eexist(ret, flags) ? 0 : ret;
200 if (tb[IPSET_ATTR_IP_TO]) {
201 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
206 } else if (tb[IPSET_ATTR_CIDR]) {
207 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
210 return -IPSET_ERR_INVALID_CIDR;
211 ip &= ip_set_hostmask(cidr);
212 ip_to = ip | ~ip_set_hostmask(cidr);
216 port_to = port = ntohs(data.port);
217 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
218 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
223 for (; !before(ip_to, ip); ip++)
224 for (p = port; p <= port_to; p++) {
226 data.port = htons(p);
227 ret = adtfn(set, &data, timeout);
229 if (ret && !ip_set_eexist(ret, flags))
238 hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b)
240 const struct ip_set_hash *x = a->data;
241 const struct ip_set_hash *y = b->data;
243 /* Resizing changes htable_bits, so we ignore it */
244 return x->maxelem == y->maxelem &&
245 x->timeout == y->timeout;
248 /* The type variant functions: IPv6 */
250 struct hash_ipport6_elem {
251 union nf_inet_addr ip;
257 struct hash_ipport6_telem {
258 union nf_inet_addr ip;
262 unsigned long timeout;
266 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
267 const struct hash_ipport6_elem *ip2)
269 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
270 ip1->port == ip2->port &&
271 ip1->proto == ip2->proto;
275 hash_ipport6_data_isnull(const struct hash_ipport6_elem *elem)
277 return elem->proto == 0;
281 hash_ipport6_data_copy(struct hash_ipport6_elem *dst,
282 const struct hash_ipport6_elem *src)
284 memcpy(dst, src, sizeof(*dst));
288 hash_ipport6_data_zero_out(struct hash_ipport6_elem *elem)
294 hash_ipport6_data_list(struct sk_buff *skb,
295 const struct hash_ipport6_elem *data)
297 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
298 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
299 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
307 hash_ipport6_data_tlist(struct sk_buff *skb,
308 const struct hash_ipport6_elem *data)
310 const struct hash_ipport6_telem *e =
311 (const struct hash_ipport6_telem *)data;
313 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
314 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
315 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
316 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
317 htonl(ip_set_timeout_get(e->timeout)));
328 #define HOST_MASK 128
329 #include <linux/netfilter/ipset/ip_set_ahash.h>
332 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
333 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
335 const struct ip_set_hash *h = set->data;
336 ipset_adtfn adtfn = set->variant->adt[adt];
337 struct hash_ipport6_elem data = { };
339 if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
340 &data.port, &data.proto))
343 ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
345 return adtfn(set, &data, h->timeout);
349 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
350 enum ipset_adt adt, u32 *lineno, u32 flags)
352 const struct ip_set_hash *h = set->data;
353 ipset_adtfn adtfn = set->variant->adt[adt];
354 struct hash_ipport6_elem data = { };
356 u32 timeout = h->timeout;
357 bool with_ports = false;
360 if (unlikely(!tb[IPSET_ATTR_IP] ||
361 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
362 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
363 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
364 tb[IPSET_ATTR_IP_TO] ||
365 tb[IPSET_ATTR_CIDR]))
366 return -IPSET_ERR_PROTOCOL;
368 if (tb[IPSET_ATTR_LINENO])
369 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
371 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
375 if (tb[IPSET_ATTR_PORT])
376 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
378 return -IPSET_ERR_PROTOCOL;
380 if (tb[IPSET_ATTR_PROTO]) {
381 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
382 with_ports = ip_set_proto_with_ports(data.proto);
385 return -IPSET_ERR_INVALID_PROTO;
387 return -IPSET_ERR_MISSING_PROTO;
389 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
392 if (tb[IPSET_ATTR_TIMEOUT]) {
393 if (!with_timeout(h->timeout))
394 return -IPSET_ERR_TIMEOUT;
395 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
398 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
399 ret = adtfn(set, &data, timeout);
400 return ip_set_eexist(ret, flags) ? 0 : ret;
403 port = ntohs(data.port);
404 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
408 for (; port <= port_to; port++) {
409 data.port = htons(port);
410 ret = adtfn(set, &data, timeout);
412 if (ret && !ip_set_eexist(ret, flags))
420 /* Create hash:ip type of sets */
423 hash_ipport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
425 struct ip_set_hash *h;
426 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
429 if (!(set->family == AF_INET || set->family == AF_INET6))
430 return -IPSET_ERR_INVALID_FAMILY;
432 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
433 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
434 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
435 return -IPSET_ERR_PROTOCOL;
437 if (tb[IPSET_ATTR_HASHSIZE]) {
438 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
439 if (hashsize < IPSET_MIMINAL_HASHSIZE)
440 hashsize = IPSET_MIMINAL_HASHSIZE;
443 if (tb[IPSET_ATTR_MAXELEM])
444 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
446 h = kzalloc(sizeof(*h), GFP_KERNEL);
450 h->maxelem = maxelem;
451 get_random_bytes(&h->initval, sizeof(h->initval));
452 h->timeout = IPSET_NO_TIMEOUT;
454 hbits = htable_bits(hashsize);
455 h->table = ip_set_alloc(
456 sizeof(struct htable)
457 + jhash_size(hbits) * sizeof(struct hbucket));
462 h->table->htable_bits = hbits;
466 if (tb[IPSET_ATTR_TIMEOUT]) {
467 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
469 set->variant = set->family == AF_INET
470 ? &hash_ipport4_tvariant : &hash_ipport6_tvariant;
472 if (set->family == AF_INET)
473 hash_ipport4_gc_init(set);
475 hash_ipport6_gc_init(set);
477 set->variant = set->family == AF_INET
478 ? &hash_ipport4_variant : &hash_ipport6_variant;
481 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
482 set->name, jhash_size(h->table->htable_bits),
483 h->table->htable_bits, h->maxelem, set->data, h->table);
488 static struct ip_set_type hash_ipport_type __read_mostly = {
489 .name = "hash:ip,port",
490 .protocol = IPSET_PROTOCOL,
491 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
492 .dimension = IPSET_DIM_TWO,
495 .create = hash_ipport_create,
497 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
498 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
499 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
500 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
501 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
502 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
505 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
506 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
507 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
508 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
509 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
510 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
511 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
512 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
518 hash_ipport_init(void)
520 return ip_set_type_register(&hash_ipport_type);
524 hash_ipport_fini(void)
526 ip_set_type_unregister(&hash_ipport_type);
529 module_init(hash_ipport_init);
530 module_exit(hash_ipport_fini);