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:net,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>
20 #include <linux/netfilter.h>
21 #include <linux/netfilter/ipset/pfxlen.h>
22 #include <linux/netfilter/ipset/ip_set.h>
23 #include <linux/netfilter/ipset/ip_set_timeout.h>
24 #include <linux/netfilter/ipset/ip_set_getport.h>
25 #include <linux/netfilter/ipset/ip_set_hash.h>
27 MODULE_LICENSE("GPL");
28 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
29 MODULE_DESCRIPTION("hash:net,port type of IP sets");
30 MODULE_ALIAS("ip_set_hash:net,port");
32 /* Type specific function prefix */
33 #define TYPE hash_netport
36 hash_netport_same_set(const struct ip_set *a, const struct ip_set *b);
38 #define hash_netport4_same_set hash_netport_same_set
39 #define hash_netport6_same_set hash_netport_same_set
41 /* The type variant functions: IPv4 */
43 /* Member elements without timeout */
44 struct hash_netport4_elem {
51 /* Member elements with timeout support */
52 struct hash_netport4_telem {
57 unsigned long timeout;
61 hash_netport4_data_equal(const struct hash_netport4_elem *ip1,
62 const struct hash_netport4_elem *ip2)
64 return ip1->ip == ip2->ip &&
65 ip1->port == ip2->port &&
66 ip1->proto == ip2->proto &&
67 ip1->cidr == ip2->cidr;
71 hash_netport4_data_isnull(const struct hash_netport4_elem *elem)
73 return elem->proto == 0;
77 hash_netport4_data_copy(struct hash_netport4_elem *dst,
78 const struct hash_netport4_elem *src)
81 dst->port = src->port;
82 dst->proto = src->proto;
83 dst->cidr = src->cidr;
87 hash_netport4_data_netmask(struct hash_netport4_elem *elem, u8 cidr)
89 elem->ip &= ip_set_netmask(cidr);
94 hash_netport4_data_zero_out(struct hash_netport4_elem *elem)
100 hash_netport4_data_list(struct sk_buff *skb,
101 const struct hash_netport4_elem *data)
103 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
104 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
105 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
106 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
114 hash_netport4_data_tlist(struct sk_buff *skb,
115 const struct hash_netport4_elem *data)
117 const struct hash_netport4_telem *tdata =
118 (const struct hash_netport4_telem *)data;
120 NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
121 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
122 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
123 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
124 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
125 htonl(ip_set_timeout_get(tdata->timeout)));
133 #define IP_SET_HASH_WITH_PROTO
134 #define IP_SET_HASH_WITH_NETS
138 #include <linux/netfilter/ipset/ip_set_ahash.h>
141 hash_netport4_data_next(struct ip_set_hash *h,
142 const struct hash_netport4_elem *d)
144 h->next.port = ntohs(d->port);
148 hash_netport4_kadt(struct ip_set *set, const struct sk_buff *skb,
149 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
151 const struct ip_set_hash *h = set->data;
152 ipset_adtfn adtfn = set->variant->adt[adt];
153 struct hash_netport4_elem data = {
154 .cidr = h->nets[0].cidr || HOST_MASK };
158 if (adt == IPSET_TEST)
159 data.cidr = HOST_MASK;
161 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
162 &data.port, &data.proto))
165 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
166 data.ip &= ip_set_netmask(data.cidr);
168 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
172 hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
173 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
175 const struct ip_set_hash *h = set->data;
176 ipset_adtfn adtfn = set->variant->adt[adt];
177 struct hash_netport4_elem data = { .cidr = HOST_MASK };
179 u32 timeout = h->timeout;
180 bool with_ports = false;
183 if (unlikely(!tb[IPSET_ATTR_IP] ||
184 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
185 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
186 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
187 return -IPSET_ERR_PROTOCOL;
189 if (tb[IPSET_ATTR_LINENO])
190 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
192 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
196 if (tb[IPSET_ATTR_CIDR])
197 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
199 return -IPSET_ERR_INVALID_CIDR;
200 data.ip &= ip_set_netmask(data.cidr);
202 if (tb[IPSET_ATTR_PORT])
203 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
205 return -IPSET_ERR_PROTOCOL;
207 if (tb[IPSET_ATTR_PROTO]) {
208 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
209 with_ports = ip_set_proto_with_ports(data.proto);
212 return -IPSET_ERR_INVALID_PROTO;
214 return -IPSET_ERR_MISSING_PROTO;
216 if (!(with_ports || data.proto == IPPROTO_ICMP))
219 if (tb[IPSET_ATTR_TIMEOUT]) {
220 if (!with_timeout(h->timeout))
221 return -IPSET_ERR_TIMEOUT;
222 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
225 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
226 ret = adtfn(set, &data, timeout, flags);
227 return ip_set_eexist(ret, flags) ? 0 : ret;
230 port = ntohs(data.port);
231 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
237 for (; port <= port_to; port++) {
238 data.port = htons(port);
239 ret = adtfn(set, &data, timeout, flags);
241 if (ret && !ip_set_eexist(ret, flags))
250 hash_netport_same_set(const struct ip_set *a, const struct ip_set *b)
252 const struct ip_set_hash *x = a->data;
253 const struct ip_set_hash *y = b->data;
255 /* Resizing changes htable_bits, so we ignore it */
256 return x->maxelem == y->maxelem &&
257 x->timeout == y->timeout;
260 /* The type variant functions: IPv6 */
262 struct hash_netport6_elem {
263 union nf_inet_addr ip;
269 struct hash_netport6_telem {
270 union nf_inet_addr ip;
274 unsigned long timeout;
278 hash_netport6_data_equal(const struct hash_netport6_elem *ip1,
279 const struct hash_netport6_elem *ip2)
281 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
282 ip1->port == ip2->port &&
283 ip1->proto == ip2->proto &&
284 ip1->cidr == ip2->cidr;
288 hash_netport6_data_isnull(const struct hash_netport6_elem *elem)
290 return elem->proto == 0;
294 hash_netport6_data_copy(struct hash_netport6_elem *dst,
295 const struct hash_netport6_elem *src)
297 memcpy(dst, src, sizeof(*dst));
301 hash_netport6_data_zero_out(struct hash_netport6_elem *elem)
307 ip6_netmask(union nf_inet_addr *ip, u8 prefix)
309 ip->ip6[0] &= ip_set_netmask6(prefix)[0];
310 ip->ip6[1] &= ip_set_netmask6(prefix)[1];
311 ip->ip6[2] &= ip_set_netmask6(prefix)[2];
312 ip->ip6[3] &= ip_set_netmask6(prefix)[3];
316 hash_netport6_data_netmask(struct hash_netport6_elem *elem, u8 cidr)
318 ip6_netmask(&elem->ip, cidr);
323 hash_netport6_data_list(struct sk_buff *skb,
324 const struct hash_netport6_elem *data)
326 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
327 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
328 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
329 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
337 hash_netport6_data_tlist(struct sk_buff *skb,
338 const struct hash_netport6_elem *data)
340 const struct hash_netport6_telem *e =
341 (const struct hash_netport6_telem *)data;
343 NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
344 NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
345 NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
346 NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
347 NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
348 htonl(ip_set_timeout_get(e->timeout)));
359 #define HOST_MASK 128
360 #include <linux/netfilter/ipset/ip_set_ahash.h>
363 hash_netport6_data_next(struct ip_set_hash *h,
364 const struct hash_netport6_elem *d)
366 h->next.port = ntohs(d->port);
370 hash_netport6_kadt(struct ip_set *set, const struct sk_buff *skb,
371 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
373 const struct ip_set_hash *h = set->data;
374 ipset_adtfn adtfn = set->variant->adt[adt];
375 struct hash_netport6_elem data = {
376 .cidr = h->nets[0].cidr || HOST_MASK };
380 if (adt == IPSET_TEST)
381 data.cidr = HOST_MASK;
383 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
384 &data.port, &data.proto))
387 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
388 ip6_netmask(&data.ip, data.cidr);
390 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
394 hash_netport6_uadt(struct ip_set *set, struct nlattr *tb[],
395 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
397 const struct ip_set_hash *h = set->data;
398 ipset_adtfn adtfn = set->variant->adt[adt];
399 struct hash_netport6_elem data = { .cidr = HOST_MASK };
401 u32 timeout = h->timeout;
402 bool with_ports = false;
405 if (unlikely(!tb[IPSET_ATTR_IP] ||
406 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
407 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
408 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
409 return -IPSET_ERR_PROTOCOL;
411 if (tb[IPSET_ATTR_LINENO])
412 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
414 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
418 if (tb[IPSET_ATTR_CIDR])
419 data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
421 return -IPSET_ERR_INVALID_CIDR;
422 ip6_netmask(&data.ip, data.cidr);
424 if (tb[IPSET_ATTR_PORT])
425 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
427 return -IPSET_ERR_PROTOCOL;
429 if (tb[IPSET_ATTR_PROTO]) {
430 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
431 with_ports = ip_set_proto_with_ports(data.proto);
434 return -IPSET_ERR_INVALID_PROTO;
436 return -IPSET_ERR_MISSING_PROTO;
438 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
441 if (tb[IPSET_ATTR_TIMEOUT]) {
442 if (!with_timeout(h->timeout))
443 return -IPSET_ERR_TIMEOUT;
444 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
447 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
448 ret = adtfn(set, &data, timeout, flags);
449 return ip_set_eexist(ret, flags) ? 0 : ret;
452 port = ntohs(data.port);
453 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
459 for (; port <= port_to; port++) {
460 data.port = htons(port);
461 ret = adtfn(set, &data, timeout, flags);
463 if (ret && !ip_set_eexist(ret, flags))
471 /* Create hash:ip type of sets */
474 hash_netport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
476 struct ip_set_hash *h;
477 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
480 if (!(set->family == AF_INET || set->family == AF_INET6))
481 return -IPSET_ERR_INVALID_FAMILY;
483 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
484 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
485 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
486 return -IPSET_ERR_PROTOCOL;
488 if (tb[IPSET_ATTR_HASHSIZE]) {
489 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
490 if (hashsize < IPSET_MIMINAL_HASHSIZE)
491 hashsize = IPSET_MIMINAL_HASHSIZE;
494 if (tb[IPSET_ATTR_MAXELEM])
495 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
497 h = kzalloc(sizeof(*h)
498 + sizeof(struct ip_set_hash_nets)
499 * (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
503 h->maxelem = maxelem;
504 get_random_bytes(&h->initval, sizeof(h->initval));
505 h->timeout = IPSET_NO_TIMEOUT;
507 hbits = htable_bits(hashsize);
508 h->table = ip_set_alloc(
509 sizeof(struct htable)
510 + jhash_size(hbits) * sizeof(struct hbucket));
515 h->table->htable_bits = hbits;
519 if (tb[IPSET_ATTR_TIMEOUT]) {
520 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
522 set->variant = set->family == AF_INET
523 ? &hash_netport4_tvariant : &hash_netport6_tvariant;
525 if (set->family == AF_INET)
526 hash_netport4_gc_init(set);
528 hash_netport6_gc_init(set);
530 set->variant = set->family == AF_INET
531 ? &hash_netport4_variant : &hash_netport6_variant;
534 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
535 set->name, jhash_size(h->table->htable_bits),
536 h->table->htable_bits, h->maxelem, set->data, h->table);
541 static struct ip_set_type hash_netport_type __read_mostly = {
542 .name = "hash:net,port",
543 .protocol = IPSET_PROTOCOL,
544 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
545 .dimension = IPSET_DIM_TWO,
548 .create = hash_netport_create,
550 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
551 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
552 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
553 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
554 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
555 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
558 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
559 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
560 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
561 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
562 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
563 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
564 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
570 hash_netport_init(void)
572 return ip_set_type_register(&hash_netport_type);
576 hash_netport_fini(void)
578 ip_set_type_unregister(&hash_netport_type);
581 module_init(hash_netport_init);
582 module_exit(hash_netport_fini);