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 #define REVISION_MIN 0
29 #define REVISION_MAX 1 /* SCTP and UDPLITE support added */
31 MODULE_LICENSE("GPL");
32 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
33 IP_SET_MODULE_DESC("hash:ip,port", REVISION_MIN, REVISION_MAX);
34 MODULE_ALIAS("ip_set_hash:ip,port");
36 /* Type specific function prefix */
37 #define TYPE hash_ipport
40 hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b);
42 #define hash_ipport4_same_set hash_ipport_same_set
43 #define hash_ipport6_same_set hash_ipport_same_set
45 /* The type variant functions: IPv4 */
47 /* Member elements without timeout */
48 struct hash_ipport4_elem {
55 /* Member elements with timeout support */
56 struct hash_ipport4_telem {
61 unsigned long timeout;
65 hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
66 const struct hash_ipport4_elem *ip2,
69 return ip1->ip == ip2->ip &&
70 ip1->port == ip2->port &&
71 ip1->proto == ip2->proto;
75 hash_ipport4_data_isnull(const struct hash_ipport4_elem *elem)
77 return elem->proto == 0;
81 hash_ipport4_data_copy(struct hash_ipport4_elem *dst,
82 const struct hash_ipport4_elem *src)
85 dst->port = src->port;
86 dst->proto = src->proto;
90 hash_ipport4_data_zero_out(struct hash_ipport4_elem *elem)
96 hash_ipport4_data_list(struct sk_buff *skb,
97 const struct hash_ipport4_elem *data)
99 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
100 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
101 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
102 goto nla_put_failure;
110 hash_ipport4_data_tlist(struct sk_buff *skb,
111 const struct hash_ipport4_elem *data)
113 const struct hash_ipport4_telem *tdata =
114 (const struct hash_ipport4_telem *)data;
116 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, tdata->ip) ||
117 nla_put_net16(skb, IPSET_ATTR_PORT, tdata->port) ||
118 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
119 nla_put_net32(skb, IPSET_ATTR_TIMEOUT,
120 htonl(ip_set_timeout_get(tdata->timeout))))
121 goto nla_put_failure;
130 #include <linux/netfilter/ipset/ip_set_ahash.h>
133 hash_ipport4_data_next(struct ip_set_hash *h,
134 const struct hash_ipport4_elem *d)
137 h->next.port = d->port;
141 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
142 const struct xt_action_param *par,
143 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
145 const struct ip_set_hash *h = set->data;
146 ipset_adtfn adtfn = set->variant->adt[adt];
147 struct hash_ipport4_elem data = { };
149 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
150 &data.port, &data.proto))
153 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
155 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
159 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
160 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
162 const struct ip_set_hash *h = set->data;
163 ipset_adtfn adtfn = set->variant->adt[adt];
164 struct hash_ipport4_elem data = { };
165 u32 ip, ip_to, p = 0, port, port_to;
166 u32 timeout = h->timeout;
167 bool with_ports = false;
170 if (unlikely(!tb[IPSET_ATTR_IP] ||
171 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
172 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
173 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
174 return -IPSET_ERR_PROTOCOL;
176 if (tb[IPSET_ATTR_LINENO])
177 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
179 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
183 if (tb[IPSET_ATTR_PORT])
184 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
186 return -IPSET_ERR_PROTOCOL;
188 if (tb[IPSET_ATTR_PROTO]) {
189 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
190 with_ports = ip_set_proto_with_ports(data.proto);
193 return -IPSET_ERR_INVALID_PROTO;
195 return -IPSET_ERR_MISSING_PROTO;
197 if (!(with_ports || data.proto == IPPROTO_ICMP))
200 if (tb[IPSET_ATTR_TIMEOUT]) {
201 if (!with_timeout(h->timeout))
202 return -IPSET_ERR_TIMEOUT;
203 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
206 if (adt == IPSET_TEST ||
207 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
208 tb[IPSET_ATTR_PORT_TO])) {
209 ret = adtfn(set, &data, timeout, flags);
210 return ip_set_eexist(ret, flags) ? 0 : ret;
213 ip_to = ip = ntohl(data.ip);
214 if (tb[IPSET_ATTR_IP_TO]) {
215 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
220 } else if (tb[IPSET_ATTR_CIDR]) {
221 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
223 if (!cidr || cidr > 32)
224 return -IPSET_ERR_INVALID_CIDR;
225 ip_set_mask_from_to(ip, ip_to, cidr);
228 port_to = port = ntohs(data.port);
229 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
230 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
236 ip = ntohl(h->next.ip);
237 for (; !before(ip_to, ip); ip++) {
238 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
240 for (; p <= port_to; p++) {
242 data.port = htons(p);
243 ret = adtfn(set, &data, timeout, flags);
245 if (ret && !ip_set_eexist(ret, flags))
255 hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b)
257 const struct ip_set_hash *x = a->data;
258 const struct ip_set_hash *y = b->data;
260 /* Resizing changes htable_bits, so we ignore it */
261 return x->maxelem == y->maxelem &&
262 x->timeout == y->timeout;
265 /* The type variant functions: IPv6 */
267 struct hash_ipport6_elem {
268 union nf_inet_addr ip;
274 struct hash_ipport6_telem {
275 union nf_inet_addr ip;
279 unsigned long timeout;
283 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
284 const struct hash_ipport6_elem *ip2,
287 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
288 ip1->port == ip2->port &&
289 ip1->proto == ip2->proto;
293 hash_ipport6_data_isnull(const struct hash_ipport6_elem *elem)
295 return elem->proto == 0;
299 hash_ipport6_data_copy(struct hash_ipport6_elem *dst,
300 const struct hash_ipport6_elem *src)
302 memcpy(dst, src, sizeof(*dst));
306 hash_ipport6_data_zero_out(struct hash_ipport6_elem *elem)
312 hash_ipport6_data_list(struct sk_buff *skb,
313 const struct hash_ipport6_elem *data)
315 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
316 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
317 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
318 goto nla_put_failure;
326 hash_ipport6_data_tlist(struct sk_buff *skb,
327 const struct hash_ipport6_elem *data)
329 const struct hash_ipport6_telem *e =
330 (const struct hash_ipport6_telem *)data;
332 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) ||
333 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
334 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
335 nla_put_net32(skb, IPSET_ATTR_TIMEOUT,
336 htonl(ip_set_timeout_get(e->timeout))))
337 goto nla_put_failure;
348 #define HOST_MASK 128
349 #include <linux/netfilter/ipset/ip_set_ahash.h>
352 hash_ipport6_data_next(struct ip_set_hash *h,
353 const struct hash_ipport6_elem *d)
355 h->next.port = d->port;
359 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
360 const struct xt_action_param *par,
361 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
363 const struct ip_set_hash *h = set->data;
364 ipset_adtfn adtfn = set->variant->adt[adt];
365 struct hash_ipport6_elem data = { };
367 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
368 &data.port, &data.proto))
371 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
373 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
377 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
378 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
380 const struct ip_set_hash *h = set->data;
381 ipset_adtfn adtfn = set->variant->adt[adt];
382 struct hash_ipport6_elem data = { };
384 u32 timeout = h->timeout;
385 bool with_ports = false;
388 if (unlikely(!tb[IPSET_ATTR_IP] ||
389 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
390 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
391 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
392 tb[IPSET_ATTR_IP_TO] ||
393 tb[IPSET_ATTR_CIDR]))
394 return -IPSET_ERR_PROTOCOL;
396 if (tb[IPSET_ATTR_LINENO])
397 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
399 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
403 if (tb[IPSET_ATTR_PORT])
404 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
406 return -IPSET_ERR_PROTOCOL;
408 if (tb[IPSET_ATTR_PROTO]) {
409 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
410 with_ports = ip_set_proto_with_ports(data.proto);
413 return -IPSET_ERR_INVALID_PROTO;
415 return -IPSET_ERR_MISSING_PROTO;
417 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
420 if (tb[IPSET_ATTR_TIMEOUT]) {
421 if (!with_timeout(h->timeout))
422 return -IPSET_ERR_TIMEOUT;
423 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
426 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
427 ret = adtfn(set, &data, timeout, flags);
428 return ip_set_eexist(ret, flags) ? 0 : ret;
431 port = ntohs(data.port);
432 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
437 port = ntohs(h->next.port);
438 for (; port <= port_to; port++) {
439 data.port = htons(port);
440 ret = adtfn(set, &data, timeout, flags);
442 if (ret && !ip_set_eexist(ret, flags))
450 /* Create hash:ip type of sets */
453 hash_ipport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
455 struct ip_set_hash *h;
456 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
460 if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6))
461 return -IPSET_ERR_INVALID_FAMILY;
463 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
464 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
465 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
466 return -IPSET_ERR_PROTOCOL;
468 if (tb[IPSET_ATTR_HASHSIZE]) {
469 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
470 if (hashsize < IPSET_MIMINAL_HASHSIZE)
471 hashsize = IPSET_MIMINAL_HASHSIZE;
474 if (tb[IPSET_ATTR_MAXELEM])
475 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
477 h = kzalloc(sizeof(*h), GFP_KERNEL);
481 h->maxelem = maxelem;
482 get_random_bytes(&h->initval, sizeof(h->initval));
483 h->timeout = IPSET_NO_TIMEOUT;
485 hbits = htable_bits(hashsize);
486 hsize = htable_size(hbits);
491 h->table = ip_set_alloc(hsize);
496 h->table->htable_bits = hbits;
500 if (tb[IPSET_ATTR_TIMEOUT]) {
501 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
503 set->variant = set->family == NFPROTO_IPV4
504 ? &hash_ipport4_tvariant : &hash_ipport6_tvariant;
506 if (set->family == NFPROTO_IPV4)
507 hash_ipport4_gc_init(set);
509 hash_ipport6_gc_init(set);
511 set->variant = set->family == NFPROTO_IPV4
512 ? &hash_ipport4_variant : &hash_ipport6_variant;
515 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
516 set->name, jhash_size(h->table->htable_bits),
517 h->table->htable_bits, h->maxelem, set->data, h->table);
522 static struct ip_set_type hash_ipport_type __read_mostly = {
523 .name = "hash:ip,port",
524 .protocol = IPSET_PROTOCOL,
525 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
526 .dimension = IPSET_DIM_TWO,
527 .family = NFPROTO_UNSPEC,
528 .revision_min = REVISION_MIN,
529 .revision_max = REVISION_MAX,
530 .create = hash_ipport_create,
532 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
533 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
534 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
535 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
536 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
537 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
540 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
541 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
542 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
543 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
544 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
545 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
546 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
547 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
553 hash_ipport_init(void)
555 return ip_set_type_register(&hash_ipport_type);
559 hash_ipport_fini(void)
561 ip_set_type_unregister(&hash_ipport_type);
564 module_init(hash_ipport_init);
565 module_exit(hash_ipport_fini);