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_kadt(struct ip_set *set, const struct sk_buff *skb,
132 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
134 const struct ip_set_hash *h = set->data;
135 ipset_adtfn adtfn = set->variant->adt[adt];
136 struct hash_ipportip4_elem data = { };
138 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
139 &data.port, &data.proto))
142 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
143 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2);
145 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
149 hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
150 enum ipset_adt adt, u32 *lineno, u32 flags)
152 const struct ip_set_hash *h = set->data;
153 ipset_adtfn adtfn = set->variant->adt[adt];
154 struct hash_ipportip4_elem data = { };
155 u32 ip, ip_to, p, port, port_to;
156 u32 timeout = h->timeout;
157 bool with_ports = false;
160 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
161 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
162 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
163 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
164 return -IPSET_ERR_PROTOCOL;
166 if (tb[IPSET_ATTR_LINENO])
167 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
169 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
173 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &data.ip2);
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 &= ip_set_hostmask(cidr);
220 ip_to = ip | ~ip_set_hostmask(cidr);
224 port_to = port = ntohs(data.port);
225 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
226 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
231 for (; !before(ip_to, ip); ip++)
232 for (p = port; p <= port_to; p++) {
234 data.port = htons(p);
235 ret = adtfn(set, &data, timeout, flags);
237 if (ret && !ip_set_eexist(ret, flags))
246 hash_ipportip_same_set(const struct ip_set *a, const struct ip_set *b)
248 const struct ip_set_hash *x = a->data;
249 const struct ip_set_hash *y = b->data;
251 /* Resizing changes htable_bits, so we ignore it */
252 return x->maxelem == y->maxelem &&
253 x->timeout == y->timeout;
256 /* The type variant functions: IPv6 */
258 struct hash_ipportip6_elem {
259 union nf_inet_addr ip;
260 union nf_inet_addr ip2;
266 struct hash_ipportip6_telem {
267 union nf_inet_addr ip;
268 union nf_inet_addr ip2;
272 unsigned long timeout;
276 hash_ipportip6_data_equal(const struct hash_ipportip6_elem *ip1,
277 const struct hash_ipportip6_elem *ip2)
279 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
280 ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
281 ip1->port == ip2->port &&
282 ip1->proto == ip2->proto;
286 hash_ipportip6_data_isnull(const struct hash_ipportip6_elem *elem)
288 return elem->proto == 0;
292 hash_ipportip6_data_copy(struct hash_ipportip6_elem *dst,
293 const struct hash_ipportip6_elem *src)
295 memcpy(dst, src, sizeof(*dst));
299 hash_ipportip6_data_zero_out(struct hash_ipportip6_elem *elem)
305 hash_ipportip6_data_list(struct sk_buff *skb,
306 const struct hash_ipportip6_elem *data)
308 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
309 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
310 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
311 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
319 hash_ipportip6_data_tlist(struct sk_buff *skb,
320 const struct hash_ipportip6_elem *data)
322 const struct hash_ipportip6_telem *e =
323 (const struct hash_ipportip6_telem *)data;
325 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
326 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
327 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
328 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
329 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
330 htonl(ip_set_timeout_get(e->timeout)));
341 #define HOST_MASK 128
342 #include <linux/netfilter/ipset/ip_set_ahash.h>
345 hash_ipportip6_kadt(struct ip_set *set, const struct sk_buff *skb,
346 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
348 const struct ip_set_hash *h = set->data;
349 ipset_adtfn adtfn = set->variant->adt[adt];
350 struct hash_ipportip6_elem data = { };
352 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
353 &data.port, &data.proto))
356 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
357 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
359 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
363 hash_ipportip6_uadt(struct ip_set *set, struct nlattr *tb[],
364 enum ipset_adt adt, u32 *lineno, u32 flags)
366 const struct ip_set_hash *h = set->data;
367 ipset_adtfn adtfn = set->variant->adt[adt];
368 struct hash_ipportip6_elem data = { };
370 u32 timeout = h->timeout;
371 bool with_ports = false;
374 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
375 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
376 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
377 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
378 tb[IPSET_ATTR_IP_TO] ||
379 tb[IPSET_ATTR_CIDR]))
380 return -IPSET_ERR_PROTOCOL;
382 if (tb[IPSET_ATTR_LINENO])
383 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
385 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
389 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
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]);
426 for (; port <= port_to; port++) {
427 data.port = htons(port);
428 ret = adtfn(set, &data, timeout, flags);
430 if (ret && !ip_set_eexist(ret, flags))
438 /* Create hash:ip type of sets */
441 hash_ipportip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
443 struct ip_set_hash *h;
444 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
447 if (!(set->family == AF_INET || set->family == AF_INET6))
448 return -IPSET_ERR_INVALID_FAMILY;
450 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
451 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
452 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
453 return -IPSET_ERR_PROTOCOL;
455 if (tb[IPSET_ATTR_HASHSIZE]) {
456 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
457 if (hashsize < IPSET_MIMINAL_HASHSIZE)
458 hashsize = IPSET_MIMINAL_HASHSIZE;
461 if (tb[IPSET_ATTR_MAXELEM])
462 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
464 h = kzalloc(sizeof(*h), GFP_KERNEL);
468 h->maxelem = maxelem;
469 get_random_bytes(&h->initval, sizeof(h->initval));
470 h->timeout = IPSET_NO_TIMEOUT;
472 hbits = htable_bits(hashsize);
473 h->table = ip_set_alloc(
474 sizeof(struct htable)
475 + jhash_size(hbits) * sizeof(struct hbucket));
480 h->table->htable_bits = hbits;
484 if (tb[IPSET_ATTR_TIMEOUT]) {
485 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
487 set->variant = set->family == AF_INET
488 ? &hash_ipportip4_tvariant : &hash_ipportip6_tvariant;
490 if (set->family == AF_INET)
491 hash_ipportip4_gc_init(set);
493 hash_ipportip6_gc_init(set);
495 set->variant = set->family == AF_INET
496 ? &hash_ipportip4_variant : &hash_ipportip6_variant;
499 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
500 set->name, jhash_size(h->table->htable_bits),
501 h->table->htable_bits, h->maxelem, set->data, h->table);
506 static struct ip_set_type hash_ipportip_type __read_mostly = {
507 .name = "hash:ip,port,ip",
508 .protocol = IPSET_PROTOCOL,
509 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
510 .dimension = IPSET_DIM_THREE,
513 .create = hash_ipportip_create,
515 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
516 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
517 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
518 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
519 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
522 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
523 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
524 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
525 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
526 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
527 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
528 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
529 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
530 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
536 hash_ipportip_init(void)
538 return ip_set_type_register(&hash_ipportip_type);
542 hash_ipportip_fini(void)
544 ip_set_type_unregister(&hash_ipportip_type);
547 module_init(hash_ipportip_init);
548 module_exit(hash_ipportip_fini);