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,
66 return ip1->ip == ip2->ip &&
67 ip1->port == ip2->port &&
68 ip1->proto == ip2->proto;
72 hash_ipport4_data_isnull(const struct hash_ipport4_elem *elem)
74 return elem->proto == 0;
78 hash_ipport4_data_copy(struct hash_ipport4_elem *dst,
79 const struct hash_ipport4_elem *src)
82 dst->port = src->port;
83 dst->proto = src->proto;
87 hash_ipport4_data_zero_out(struct hash_ipport4_elem *elem)
93 hash_ipport4_data_list(struct sk_buff *skb,
94 const struct hash_ipport4_elem *data)
96 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
97 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
98 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
107 hash_ipport4_data_tlist(struct sk_buff *skb,
108 const struct hash_ipport4_elem *data)
110 const struct hash_ipport4_telem *tdata =
111 (const struct hash_ipport4_telem *)data;
113 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, tdata->ip) ||
114 nla_put_net16(skb, IPSET_ATTR_PORT, tdata->port) ||
115 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
116 nla_put_net32(skb, IPSET_ATTR_TIMEOUT,
117 htonl(ip_set_timeout_get(tdata->timeout))))
118 goto nla_put_failure;
127 #include <linux/netfilter/ipset/ip_set_ahash.h>
130 hash_ipport4_data_next(struct ip_set_hash *h,
131 const struct hash_ipport4_elem *d)
133 h->next.ip = ntohl(d->ip);
134 h->next.port = ntohs(d->port);
138 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
139 const struct xt_action_param *par,
140 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
142 const struct ip_set_hash *h = set->data;
143 ipset_adtfn adtfn = set->variant->adt[adt];
144 struct hash_ipport4_elem data = { };
146 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
147 &data.port, &data.proto))
150 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
152 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
156 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
157 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
159 const struct ip_set_hash *h = set->data;
160 ipset_adtfn adtfn = set->variant->adt[adt];
161 struct hash_ipport4_elem data = { };
162 u32 ip, ip_to = 0, p = 0, port, port_to;
163 u32 timeout = h->timeout;
164 bool with_ports = false;
167 if (unlikely(!tb[IPSET_ATTR_IP] ||
168 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
169 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
170 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
171 return -IPSET_ERR_PROTOCOL;
173 if (tb[IPSET_ATTR_LINENO])
174 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
176 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
180 if (tb[IPSET_ATTR_PORT])
181 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
183 return -IPSET_ERR_PROTOCOL;
185 if (tb[IPSET_ATTR_PROTO]) {
186 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
187 with_ports = ip_set_proto_with_ports(data.proto);
190 return -IPSET_ERR_INVALID_PROTO;
192 return -IPSET_ERR_MISSING_PROTO;
194 if (!(with_ports || data.proto == IPPROTO_ICMP))
197 if (tb[IPSET_ATTR_TIMEOUT]) {
198 if (!with_timeout(h->timeout))
199 return -IPSET_ERR_TIMEOUT;
200 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
203 if (adt == IPSET_TEST ||
204 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
205 tb[IPSET_ATTR_PORT_TO])) {
206 ret = adtfn(set, &data, timeout, flags);
207 return ip_set_eexist(ret, flags) ? 0 : ret;
211 if (tb[IPSET_ATTR_IP_TO]) {
212 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
217 } else if (tb[IPSET_ATTR_CIDR]) {
218 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
221 return -IPSET_ERR_INVALID_CIDR;
222 ip_set_mask_from_to(ip, ip_to, cidr);
226 port_to = port = ntohs(data.port);
227 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
228 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
235 for (; !before(ip_to, ip); ip++) {
236 p = retried && ip == h->next.ip ? h->next.port : port;
237 for (; p <= port_to; p++) {
239 data.port = htons(p);
240 ret = adtfn(set, &data, timeout, flags);
242 if (ret && !ip_set_eexist(ret, flags))
252 hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b)
254 const struct ip_set_hash *x = a->data;
255 const struct ip_set_hash *y = b->data;
257 /* Resizing changes htable_bits, so we ignore it */
258 return x->maxelem == y->maxelem &&
259 x->timeout == y->timeout;
262 /* The type variant functions: IPv6 */
264 struct hash_ipport6_elem {
265 union nf_inet_addr ip;
271 struct hash_ipport6_telem {
272 union nf_inet_addr ip;
276 unsigned long timeout;
280 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
281 const struct hash_ipport6_elem *ip2,
284 return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
285 ip1->port == ip2->port &&
286 ip1->proto == ip2->proto;
290 hash_ipport6_data_isnull(const struct hash_ipport6_elem *elem)
292 return elem->proto == 0;
296 hash_ipport6_data_copy(struct hash_ipport6_elem *dst,
297 const struct hash_ipport6_elem *src)
299 memcpy(dst, src, sizeof(*dst));
303 hash_ipport6_data_zero_out(struct hash_ipport6_elem *elem)
309 hash_ipport6_data_list(struct sk_buff *skb,
310 const struct hash_ipport6_elem *data)
312 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
313 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
314 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
315 goto nla_put_failure;
323 hash_ipport6_data_tlist(struct sk_buff *skb,
324 const struct hash_ipport6_elem *data)
326 const struct hash_ipport6_telem *e =
327 (const struct hash_ipport6_telem *)data;
329 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) ||
330 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
331 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
332 nla_put_net32(skb, IPSET_ATTR_TIMEOUT,
333 htonl(ip_set_timeout_get(e->timeout))))
334 goto nla_put_failure;
345 #define HOST_MASK 128
346 #include <linux/netfilter/ipset/ip_set_ahash.h>
349 hash_ipport6_data_next(struct ip_set_hash *h,
350 const struct hash_ipport6_elem *d)
352 h->next.port = ntohs(d->port);
356 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
357 const struct xt_action_param *par,
358 enum ipset_adt adt, const struct ip_set_adt_opt *opt)
360 const struct ip_set_hash *h = set->data;
361 ipset_adtfn adtfn = set->variant->adt[adt];
362 struct hash_ipport6_elem data = { };
364 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
365 &data.port, &data.proto))
368 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
370 return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
374 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
375 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
377 const struct ip_set_hash *h = set->data;
378 ipset_adtfn adtfn = set->variant->adt[adt];
379 struct hash_ipport6_elem data = { };
381 u32 timeout = h->timeout;
382 bool with_ports = false;
385 if (unlikely(!tb[IPSET_ATTR_IP] ||
386 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
387 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
388 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
389 tb[IPSET_ATTR_IP_TO] ||
390 tb[IPSET_ATTR_CIDR]))
391 return -IPSET_ERR_PROTOCOL;
393 if (tb[IPSET_ATTR_LINENO])
394 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
396 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
400 if (tb[IPSET_ATTR_PORT])
401 data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
403 return -IPSET_ERR_PROTOCOL;
405 if (tb[IPSET_ATTR_PROTO]) {
406 data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
407 with_ports = ip_set_proto_with_ports(data.proto);
410 return -IPSET_ERR_INVALID_PROTO;
412 return -IPSET_ERR_MISSING_PROTO;
414 if (!(with_ports || data.proto == IPPROTO_ICMPV6))
417 if (tb[IPSET_ATTR_TIMEOUT]) {
418 if (!with_timeout(h->timeout))
419 return -IPSET_ERR_TIMEOUT;
420 timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
423 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
424 ret = adtfn(set, &data, timeout, flags);
425 return ip_set_eexist(ret, flags) ? 0 : ret;
428 port = ntohs(data.port);
429 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
435 for (; port <= port_to; port++) {
436 data.port = htons(port);
437 ret = adtfn(set, &data, timeout, flags);
439 if (ret && !ip_set_eexist(ret, flags))
447 /* Create hash:ip type of sets */
450 hash_ipport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
452 struct ip_set_hash *h;
453 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
457 if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6))
458 return -IPSET_ERR_INVALID_FAMILY;
460 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
461 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
462 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
463 return -IPSET_ERR_PROTOCOL;
465 if (tb[IPSET_ATTR_HASHSIZE]) {
466 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
467 if (hashsize < IPSET_MIMINAL_HASHSIZE)
468 hashsize = IPSET_MIMINAL_HASHSIZE;
471 if (tb[IPSET_ATTR_MAXELEM])
472 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
474 h = kzalloc(sizeof(*h), GFP_KERNEL);
478 h->maxelem = maxelem;
479 get_random_bytes(&h->initval, sizeof(h->initval));
480 h->timeout = IPSET_NO_TIMEOUT;
482 hbits = htable_bits(hashsize);
483 hsize = htable_size(hbits);
488 h->table = ip_set_alloc(hsize);
493 h->table->htable_bits = hbits;
497 if (tb[IPSET_ATTR_TIMEOUT]) {
498 h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
500 set->variant = set->family == NFPROTO_IPV4
501 ? &hash_ipport4_tvariant : &hash_ipport6_tvariant;
503 if (set->family == NFPROTO_IPV4)
504 hash_ipport4_gc_init(set);
506 hash_ipport6_gc_init(set);
508 set->variant = set->family == NFPROTO_IPV4
509 ? &hash_ipport4_variant : &hash_ipport6_variant;
512 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
513 set->name, jhash_size(h->table->htable_bits),
514 h->table->htable_bits, h->maxelem, set->data, h->table);
519 static struct ip_set_type hash_ipport_type __read_mostly = {
520 .name = "hash:ip,port",
521 .protocol = IPSET_PROTOCOL,
522 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
523 .dimension = IPSET_DIM_TWO,
524 .family = NFPROTO_UNSPEC,
526 .revision_max = 1, /* SCTP and UDPLITE support added */
527 .create = hash_ipport_create,
529 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
530 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
531 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
532 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
533 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
534 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
537 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
538 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
539 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
540 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
541 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
542 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
543 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
544 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
550 hash_ipport_init(void)
552 return ip_set_type_register(&hash_ipport_type);
556 hash_ipport_fini(void)
558 ip_set_type_unregister(&hash_ipport_type);
561 module_init(hash_ipport_init);
562 module_exit(hash_ipport_fini);