1 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
2 * Copyright (C) 2013 Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 /* Kernel module implementing an IP set type: the hash:net type */
11 #include <linux/jhash.h>
12 #include <linux/module.h>
14 #include <linux/skbuff.h>
15 #include <linux/errno.h>
16 #include <linux/random.h>
19 #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_hash.h>
26 #define IPSET_TYPE_REV_MIN 0
27 /* 1 Forceadd support added */
28 #define IPSET_TYPE_REV_MAX 2 /* skbinfo support added */
30 MODULE_LICENSE("GPL");
31 MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
32 IP_SET_MODULE_DESC("hash:net,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
33 MODULE_ALIAS("ip_set_hash:net,net");
35 /* Type specific function prefix */
36 #define HTYPE hash_netnet
37 #define IP_SET_HASH_WITH_NETS
38 #define IPSET_NET_COUNT 2
43 struct hash_netnet4_elem {
56 /* Common functions */
59 hash_netnet4_data_equal(const struct hash_netnet4_elem *ip1,
60 const struct hash_netnet4_elem *ip2,
63 return ip1->ipcmp == ip2->ipcmp &&
64 ip1->ccmp == ip2->ccmp;
68 hash_netnet4_do_data_match(const struct hash_netnet4_elem *elem)
70 return elem->nomatch ? -ENOTEMPTY : 1;
74 hash_netnet4_data_set_flags(struct hash_netnet4_elem *elem, u32 flags)
76 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
80 hash_netnet4_data_reset_flags(struct hash_netnet4_elem *elem, u8 *flags)
82 swap(*flags, elem->nomatch);
86 hash_netnet4_data_reset_elem(struct hash_netnet4_elem *elem,
87 struct hash_netnet4_elem *orig)
89 elem->ip[1] = orig->ip[1];
93 hash_netnet4_data_netmask(struct hash_netnet4_elem *elem, u8 cidr, bool inner)
96 elem->ip[1] &= ip_set_netmask(cidr);
99 elem->ip[0] &= ip_set_netmask(cidr);
100 elem->cidr[0] = cidr;
105 hash_netnet4_data_list(struct sk_buff *skb,
106 const struct hash_netnet4_elem *data)
108 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
110 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
111 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
112 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
113 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
115 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
116 goto nla_put_failure;
124 hash_netnet4_data_next(struct hash_netnet4_elem *next,
125 const struct hash_netnet4_elem *d)
127 next->ipcmp = d->ipcmp;
130 #define MTYPE hash_netnet4
132 #include "ip_set_hash_gen.h"
135 hash_netnet4_init(struct hash_netnet4_elem *e)
137 e->cidr[0] = HOST_MASK;
138 e->cidr[1] = HOST_MASK;
142 hash_netnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
143 const struct xt_action_param *par,
144 enum ipset_adt adt, struct ip_set_adt_opt *opt)
146 const struct hash_netnet4 *h = set->data;
147 ipset_adtfn adtfn = set->variant->adt[adt];
148 struct hash_netnet4_elem e = { };
149 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
151 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
152 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
153 if (adt == IPSET_TEST)
154 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
156 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
157 ip4addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1]);
158 e.ip[0] &= ip_set_netmask(e.cidr[0]);
159 e.ip[1] &= ip_set_netmask(e.cidr[1]);
161 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
165 hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
166 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
168 const struct hash_netnet4 *h = set->data;
169 ipset_adtfn adtfn = set->variant->adt[adt];
170 struct hash_netnet4_elem e = { };
171 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
172 u32 ip = 0, ip_to = 0, last;
173 u32 ip2 = 0, ip2_from = 0, ip2_to = 0, last2;
176 if (tb[IPSET_ATTR_LINENO])
177 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
179 hash_netnet4_init(&e);
180 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
181 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
182 return -IPSET_ERR_PROTOCOL;
184 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
188 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
192 ret = ip_set_get_extensions(set, tb, &ext);
196 if (tb[IPSET_ATTR_CIDR]) {
197 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
198 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
199 return -IPSET_ERR_INVALID_CIDR;
202 if (tb[IPSET_ATTR_CIDR2]) {
203 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
204 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
205 return -IPSET_ERR_INVALID_CIDR;
208 if (tb[IPSET_ATTR_CADT_FLAGS]) {
209 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
211 if (cadt_flags & IPSET_FLAG_NOMATCH)
212 flags |= (IPSET_FLAG_NOMATCH << 16);
215 if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
216 tb[IPSET_ATTR_IP2_TO])) {
217 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
218 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
219 ret = adtfn(set, &e, &ext, &ext, flags);
220 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
221 ip_set_eexist(ret, flags) ? 0 : ret;
225 if (tb[IPSET_ATTR_IP_TO]) {
226 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
231 if (unlikely(ip + UINT_MAX == ip_to))
232 return -IPSET_ERR_HASH_RANGE;
234 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
238 if (tb[IPSET_ATTR_IP2_TO]) {
239 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
242 if (ip2_to < ip2_from)
243 swap(ip2_from, ip2_to);
244 if (unlikely(ip2_from + UINT_MAX == ip2_to))
245 return -IPSET_ERR_HASH_RANGE;
247 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
251 ip = ntohl(h->next.ip[0]);
253 while (!after(ip, ip_to)) {
255 last = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
257 ip == ntohl(h->next.ip[0])) ? ntohl(h->next.ip[1])
259 while (!after(ip2, ip2_to)) {
260 e.ip[1] = htonl(ip2);
261 last2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
262 ret = adtfn(set, &e, &ext, &ext, flags);
263 if (ret && !ip_set_eexist(ret, flags))
276 struct hash_netnet6_elem {
277 union nf_inet_addr ip[2];
286 /* Common functions */
289 hash_netnet6_data_equal(const struct hash_netnet6_elem *ip1,
290 const struct hash_netnet6_elem *ip2,
293 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
294 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
295 ip1->ccmp == ip2->ccmp;
299 hash_netnet6_do_data_match(const struct hash_netnet6_elem *elem)
301 return elem->nomatch ? -ENOTEMPTY : 1;
305 hash_netnet6_data_set_flags(struct hash_netnet6_elem *elem, u32 flags)
307 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
311 hash_netnet6_data_reset_flags(struct hash_netnet6_elem *elem, u8 *flags)
313 swap(*flags, elem->nomatch);
317 hash_netnet6_data_reset_elem(struct hash_netnet6_elem *elem,
318 struct hash_netnet6_elem *orig)
320 elem->ip[1] = orig->ip[1];
324 hash_netnet6_data_netmask(struct hash_netnet6_elem *elem, u8 cidr, bool inner)
327 ip6_netmask(&elem->ip[1], cidr);
328 elem->cidr[1] = cidr;
330 ip6_netmask(&elem->ip[0], cidr);
331 elem->cidr[0] = cidr;
336 hash_netnet6_data_list(struct sk_buff *skb,
337 const struct hash_netnet6_elem *data)
339 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
341 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
342 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
343 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
344 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
346 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
347 goto nla_put_failure;
355 hash_netnet6_data_next(struct hash_netnet6_elem *next,
356 const struct hash_netnet6_elem *d)
363 #define MTYPE hash_netnet6
364 #define HOST_MASK 128
365 #define IP_SET_EMIT_CREATE
366 #include "ip_set_hash_gen.h"
369 hash_netnet6_init(struct hash_netnet6_elem *e)
371 e->cidr[0] = HOST_MASK;
372 e->cidr[1] = HOST_MASK;
376 hash_netnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
377 const struct xt_action_param *par,
378 enum ipset_adt adt, struct ip_set_adt_opt *opt)
380 const struct hash_netnet6 *h = set->data;
381 ipset_adtfn adtfn = set->variant->adt[adt];
382 struct hash_netnet6_elem e = { };
383 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
385 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
386 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
387 if (adt == IPSET_TEST)
388 e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
390 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
391 ip6addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1].in6);
392 ip6_netmask(&e.ip[0], e.cidr[0]);
393 ip6_netmask(&e.ip[1], e.cidr[1]);
395 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
399 hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
400 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
402 ipset_adtfn adtfn = set->variant->adt[adt];
403 struct hash_netnet6_elem e = { };
404 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
407 if (tb[IPSET_ATTR_LINENO])
408 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
410 hash_netnet6_init(&e);
411 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
412 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
413 return -IPSET_ERR_PROTOCOL;
414 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
415 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
417 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]);
421 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]);
425 ret = ip_set_get_extensions(set, tb, &ext);
429 if (tb[IPSET_ATTR_CIDR]) {
430 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
431 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
432 return -IPSET_ERR_INVALID_CIDR;
435 if (tb[IPSET_ATTR_CIDR2]) {
436 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
437 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
438 return -IPSET_ERR_INVALID_CIDR;
441 ip6_netmask(&e.ip[0], e.cidr[0]);
442 ip6_netmask(&e.ip[1], e.cidr[1]);
444 if (tb[IPSET_ATTR_CADT_FLAGS]) {
445 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
447 if (cadt_flags & IPSET_FLAG_NOMATCH)
448 flags |= (IPSET_FLAG_NOMATCH << 16);
451 ret = adtfn(set, &e, &ext, &ext, flags);
453 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
454 ip_set_eexist(ret, flags) ? 0 : ret;
457 static struct ip_set_type hash_netnet_type __read_mostly = {
458 .name = "hash:net,net",
459 .protocol = IPSET_PROTOCOL,
460 .features = IPSET_TYPE_IP | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH,
461 .dimension = IPSET_DIM_TWO,
462 .family = NFPROTO_UNSPEC,
463 .revision_min = IPSET_TYPE_REV_MIN,
464 .revision_max = IPSET_TYPE_REV_MAX,
465 .create = hash_netnet_create,
467 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
468 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
469 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
470 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
471 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
472 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
475 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
476 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
477 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
478 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
479 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
480 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
481 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
482 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
483 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
484 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
485 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
486 .len = IPSET_MAX_COMMENT_SIZE },
487 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
488 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
489 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
495 hash_netnet_init(void)
497 return ip_set_type_register(&hash_netnet_type);
501 hash_netnet_fini(void)
504 ip_set_type_unregister(&hash_netnet_type);
507 module_init(hash_netnet_init);
508 module_exit(hash_netnet_fini);