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_data_next(struct ip_set_hash *h,
129 const struct hash_ipport4_elem *d)
131 h->next.ip = ntohl(d->ip);
132 h->next.port = ntohs(d->port);
136 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
137 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
139 const struct ip_set_hash *h = set->data;
140 ipset_adtfn adtfn = set->variant->adt[adt];
141 struct hash_ipport4_elem data = { };
143 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
144 &data.port, &data.proto))
147 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
149 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
153 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
154 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
156 const struct ip_set_hash *h = set->data;
157 ipset_adtfn adtfn = set->variant->adt[adt];
158 struct hash_ipport4_elem data = { };
159 u32 ip, ip_to, p = 0, port, port_to;
160 u32 timeout = h->timeout;
161 bool with_ports = false;
164 if (unlikely(!tb[IPSET_ATTR_IP] ||
165 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
166 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
167 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
168 return -IPSET_ERR_PROTOCOL;
170 if (tb[IPSET_ATTR_LINENO])
171 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
173 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
177 if (tb[IPSET_ATTR_PORT])
178 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
180 return -IPSET_ERR_PROTOCOL;
182 if (tb[IPSET_ATTR_PROTO]) {
183 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
184 with_ports = ip_set_proto_with_ports(data.proto);
187 return -IPSET_ERR_INVALID_PROTO;
189 return -IPSET_ERR_MISSING_PROTO;
191 if (!(with_ports || data.proto == IPPROTO_ICMP))
194 if (tb[IPSET_ATTR_TIMEOUT]) {
195 if (!with_timeout(h->timeout))
196 return -IPSET_ERR_TIMEOUT;
197 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
200 if (adt == IPSET_TEST ||
201 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
202 tb[IPSET_ATTR_PORT_TO])) {
203 ret = adtfn(set, &data, timeout, flags);
204 return ip_set_eexist(ret, flags) ? 0 : ret;
208 if (tb[IPSET_ATTR_IP_TO]) {
209 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
214 } else if (tb[IPSET_ATTR_CIDR]) {
215 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
218 return -IPSET_ERR_INVALID_CIDR;
219 ip_set_mask_from_to(ip, ip_to, cidr);
223 port_to = port = ntohs(data.port);
224 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
225 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
232 for (; !before(ip_to, ip); ip++) {
233 p = retried && ip == h->next.ip ? h->next.port : port;
234 for (; p <= port_to; p++) {
236 data.port = htons(p);
237 ret = adtfn(set, &data, timeout, flags);
239 if (ret && !ip_set_eexist(ret, flags))
249 hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b)
251 const struct ip_set_hash *x = a->data;
252 const struct ip_set_hash *y = b->data;
254 /* Resizing changes htable_bits, so we ignore it */
255 return x->maxelem == y->maxelem &&
256 x->timeout == y->timeout;
259 /* The type variant functions: IPv6 */
261 struct hash_ipport6_elem {
262 union nf_inet_addr ip;
268 struct hash_ipport6_telem {
269 union nf_inet_addr ip;
273 unsigned long timeout;
277 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
278 const struct hash_ipport6_elem *ip2)
280 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
281 ip1->port == ip2->port &&
282 ip1->proto == ip2->proto;
286 hash_ipport6_data_isnull(const struct hash_ipport6_elem *elem)
288 return elem->proto == 0;
292 hash_ipport6_data_copy(struct hash_ipport6_elem *dst,
293 const struct hash_ipport6_elem *src)
295 memcpy(dst, src, sizeof(*dst));
299 hash_ipport6_data_zero_out(struct hash_ipport6_elem *elem)
305 hash_ipport6_data_list(struct sk_buff *skb,
306 const struct hash_ipport6_elem *data)
308 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
309 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
310 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
318 hash_ipport6_data_tlist(struct sk_buff *skb,
319 const struct hash_ipport6_elem *data)
321 const struct hash_ipport6_telem *e =
322 (const struct hash_ipport6_telem *)data;
324 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
325 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
326 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
327 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
328 htonl(ip_set_timeout_get(e->timeout)));
339 #define HOST_MASK 128
340 #include <linux/netfilter/ipset/ip_set_ahash.h>
343 hash_ipport6_data_next(struct ip_set_hash *h,
344 const struct hash_ipport6_elem *d)
346 h->next.port = ntohs(d->port);
350 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
351 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
353 const struct ip_set_hash *h = set->data;
354 ipset_adtfn adtfn = set->variant->adt[adt];
355 struct hash_ipport6_elem data = { };
357 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
358 &data.port, &data.proto))
361 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
363 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
367 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
368 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
370 const struct ip_set_hash *h = set->data;
371 ipset_adtfn adtfn = set->variant->adt[adt];
372 struct hash_ipport6_elem data = { };
374 u32 timeout = h->timeout;
375 bool with_ports = false;
378 if (unlikely(!tb[IPSET_ATTR_IP] ||
379 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
380 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
381 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
382 tb[IPSET_ATTR_IP_TO] ||
383 tb[IPSET_ATTR_CIDR]))
384 return -IPSET_ERR_PROTOCOL;
386 if (tb[IPSET_ATTR_LINENO])
387 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
389 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
393 if (tb[IPSET_ATTR_PORT])
394 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
396 return -IPSET_ERR_PROTOCOL;
398 if (tb[IPSET_ATTR_PROTO]) {
399 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
400 with_ports = ip_set_proto_with_ports(data.proto);
403 return -IPSET_ERR_INVALID_PROTO;
405 return -IPSET_ERR_MISSING_PROTO;
407 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
410 if (tb[IPSET_ATTR_TIMEOUT]) {
411 if (!with_timeout(h->timeout))
412 return -IPSET_ERR_TIMEOUT;
413 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
416 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
417 ret = adtfn(set, &data, timeout, flags);
418 return ip_set_eexist(ret, flags) ? 0 : ret;
421 port = ntohs(data.port);
422 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
428 for (; port <= port_to; port++) {
429 data.port = htons(port);
430 ret = adtfn(set, &data, timeout, flags);
432 if (ret && !ip_set_eexist(ret, flags))
440 /* Create hash:ip type of sets */
443 hash_ipport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
445 struct ip_set_hash *h;
446 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
449 if (!(set->family == AF_INET || set->family == AF_INET6))
450 return -IPSET_ERR_INVALID_FAMILY;
452 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
453 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
454 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
455 return -IPSET_ERR_PROTOCOL;
457 if (tb[IPSET_ATTR_HASHSIZE]) {
458 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
459 if (hashsize < IPSET_MIMINAL_HASHSIZE)
460 hashsize = IPSET_MIMINAL_HASHSIZE;
463 if (tb[IPSET_ATTR_MAXELEM])
464 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
466 h = kzalloc(sizeof(*h), GFP_KERNEL);
470 h->maxelem = maxelem;
471 get_random_bytes(&h->initval, sizeof(h->initval));
472 h->timeout = IPSET_NO_TIMEOUT;
474 hbits = htable_bits(hashsize);
475 h->table = ip_set_alloc(
476 sizeof(struct htable)
477 + jhash_size(hbits) * sizeof(struct hbucket));
482 h->table->htable_bits = hbits;
486 if (tb[IPSET_ATTR_TIMEOUT]) {
487 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
489 set->variant = set->family == AF_INET
490 ? &hash_ipport4_tvariant : &hash_ipport6_tvariant;
492 if (set->family == AF_INET)
493 hash_ipport4_gc_init(set);
495 hash_ipport6_gc_init(set);
497 set->variant = set->family == AF_INET
498 ? &hash_ipport4_variant : &hash_ipport6_variant;
501 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
502 set->name, jhash_size(h->table->htable_bits),
503 h->table->htable_bits, h->maxelem, set->data, h->table);
508 static struct ip_set_type hash_ipport_type __read_mostly = {
509 .name = "hash:ip,port",
510 .protocol = IPSET_PROTOCOL,
511 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
512 .dimension = IPSET_DIM_TWO,
515 .revision_max = 1, /* SCTP and UDPLITE support added */
516 .create = hash_ipport_create,
518 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
519 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
520 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
521 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
522 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
523 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
526 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
527 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
528 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
529 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
530 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
531 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
532 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
533 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
539 hash_ipport_init(void)
541 return ip_set_type_register(&hash_ipport_type);
545 hash_ipport_fini(void)
547 ip_set_type_unregister(&hash_ipport_type);
550 module_init(hash_ipport_init);
551 module_exit(hash_ipport_fini);