1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org>
3 * Copyright (C) 2013 Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
6 /* Kernel module implementing an IP set type: the hash:net type */
8 #include <linux/jhash.h>
9 #include <linux/module.h>
11 #include <linux/skbuff.h>
12 #include <linux/errno.h>
13 #include <linux/random.h>
16 #include <net/netlink.h>
18 #include <linux/netfilter.h>
19 #include <linux/netfilter/ipset/pfxlen.h>
20 #include <linux/netfilter/ipset/ip_set.h>
21 #include <linux/netfilter/ipset/ip_set_hash.h>
23 #define IPSET_TYPE_REV_MIN 0
24 /* 1 Forceadd support added */
25 /* 2 skbinfo support added */
26 /* 3 bucketsize, initval support added */
27 #define IPSET_TYPE_REV_MAX 4 /* bitmask support added */
29 MODULE_LICENSE("GPL");
30 MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
31 IP_SET_MODULE_DESC("hash:net,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
32 MODULE_ALIAS("ip_set_hash:net,net");
34 /* Type specific function prefix */
35 #define HTYPE hash_netnet
36 #define IP_SET_HASH_WITH_NETS
37 #define IP_SET_HASH_WITH_NETMASK
38 #define IP_SET_HASH_WITH_BITMASK
39 #define IPSET_NET_COUNT 2
44 struct hash_netnet4_elem {
57 /* Common functions */
60 hash_netnet4_data_equal(const struct hash_netnet4_elem *ip1,
61 const struct hash_netnet4_elem *ip2,
64 return ip1->ipcmp == ip2->ipcmp &&
65 ip1->ccmp == ip2->ccmp;
69 hash_netnet4_do_data_match(const struct hash_netnet4_elem *elem)
71 return elem->nomatch ? -ENOTEMPTY : 1;
75 hash_netnet4_data_set_flags(struct hash_netnet4_elem *elem, u32 flags)
77 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
81 hash_netnet4_data_reset_flags(struct hash_netnet4_elem *elem, u8 *flags)
83 swap(*flags, elem->nomatch);
87 hash_netnet4_data_reset_elem(struct hash_netnet4_elem *elem,
88 struct hash_netnet4_elem *orig)
90 elem->ip[1] = orig->ip[1];
94 hash_netnet4_data_netmask(struct hash_netnet4_elem *elem, u8 cidr, bool inner)
97 elem->ip[1] &= ip_set_netmask(cidr);
100 elem->ip[0] &= ip_set_netmask(cidr);
101 elem->cidr[0] = cidr;
106 hash_netnet4_data_list(struct sk_buff *skb,
107 const struct hash_netnet4_elem *data)
109 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
111 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
112 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
113 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
114 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
116 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
117 goto nla_put_failure;
125 hash_netnet4_data_next(struct hash_netnet4_elem *next,
126 const struct hash_netnet4_elem *d)
128 next->ipcmp = d->ipcmp;
131 #define MTYPE hash_netnet4
133 #include "ip_set_hash_gen.h"
136 hash_netnet4_init(struct hash_netnet4_elem *e)
138 e->cidr[0] = HOST_MASK;
139 e->cidr[1] = HOST_MASK;
143 hash_netnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
144 const struct xt_action_param *par,
145 enum ipset_adt adt, struct ip_set_adt_opt *opt)
147 const struct hash_netnet4 *h = set->data;
148 ipset_adtfn adtfn = set->variant->adt[adt];
149 struct hash_netnet4_elem e = { };
150 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
152 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
153 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
154 if (adt == IPSET_TEST)
155 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
157 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
158 ip4addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1]);
159 e.ip[0] &= (ip_set_netmask(e.cidr[0]) & h->bitmask.ip);
160 e.ip[1] &= (ip_set_netmask(e.cidr[1]) & h->bitmask.ip);
162 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
166 hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
167 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
169 struct hash_netnet4 *h = set->data;
170 ipset_adtfn adtfn = set->variant->adt[adt];
171 struct hash_netnet4_elem e = { };
172 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
173 u32 ip = 0, ip_to = 0;
174 u32 ip2 = 0, ip2_from = 0, ip2_to = 0, i = 0;
177 if (tb[IPSET_ATTR_LINENO])
178 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
180 hash_netnet4_init(&e);
181 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
182 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
183 return -IPSET_ERR_PROTOCOL;
185 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
189 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
193 ret = ip_set_get_extensions(set, tb, &ext);
197 if (tb[IPSET_ATTR_CIDR]) {
198 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
199 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
200 return -IPSET_ERR_INVALID_CIDR;
203 if (tb[IPSET_ATTR_CIDR2]) {
204 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
205 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
206 return -IPSET_ERR_INVALID_CIDR;
209 if (tb[IPSET_ATTR_CADT_FLAGS]) {
210 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
212 if (cadt_flags & IPSET_FLAG_NOMATCH)
213 flags |= (IPSET_FLAG_NOMATCH << 16);
216 if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
217 tb[IPSET_ATTR_IP2_TO])) {
218 e.ip[0] = htonl(ip & ntohl(h->bitmask.ip) & ip_set_hostmask(e.cidr[0]));
219 e.ip[1] = htonl(ip2_from & ntohl(h->bitmask.ip) & ip_set_hostmask(e.cidr[1]));
220 ret = adtfn(set, &e, &ext, &ext, flags);
221 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
222 ip_set_eexist(ret, flags) ? 0 : ret;
226 if (tb[IPSET_ATTR_IP_TO]) {
227 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
232 if (unlikely(ip + UINT_MAX == ip_to))
233 return -IPSET_ERR_HASH_RANGE;
235 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
239 if (tb[IPSET_ATTR_IP2_TO]) {
240 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
243 if (ip2_to < ip2_from)
244 swap(ip2_from, ip2_to);
245 if (unlikely(ip2_from + UINT_MAX == ip2_to))
246 return -IPSET_ERR_HASH_RANGE;
248 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
252 ip = ntohl(h->next.ip[0]);
253 ip2 = ntohl(h->next.ip[1]);
260 ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
263 e.ip[1] = htonl(ip2);
264 if (i > IPSET_MAX_RANGE) {
265 hash_netnet4_data_next(&h->next, &e);
268 ip2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
269 ret = adtfn(set, &e, &ext, &ext, flags);
270 if (ret && !ip_set_eexist(ret, flags))
274 } while (ip2++ < ip2_to);
276 } while (ip++ < ip_to);
282 struct hash_netnet6_elem {
283 union nf_inet_addr ip[2];
292 /* Common functions */
295 hash_netnet6_data_equal(const struct hash_netnet6_elem *ip1,
296 const struct hash_netnet6_elem *ip2,
299 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
300 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
301 ip1->ccmp == ip2->ccmp;
305 hash_netnet6_do_data_match(const struct hash_netnet6_elem *elem)
307 return elem->nomatch ? -ENOTEMPTY : 1;
311 hash_netnet6_data_set_flags(struct hash_netnet6_elem *elem, u32 flags)
313 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
317 hash_netnet6_data_reset_flags(struct hash_netnet6_elem *elem, u8 *flags)
319 swap(*flags, elem->nomatch);
323 hash_netnet6_data_reset_elem(struct hash_netnet6_elem *elem,
324 struct hash_netnet6_elem *orig)
326 elem->ip[1] = orig->ip[1];
330 hash_netnet6_data_netmask(struct hash_netnet6_elem *elem, u8 cidr, bool inner)
333 ip6_netmask(&elem->ip[1], cidr);
334 elem->cidr[1] = cidr;
336 ip6_netmask(&elem->ip[0], cidr);
337 elem->cidr[0] = cidr;
342 hash_netnet6_data_list(struct sk_buff *skb,
343 const struct hash_netnet6_elem *data)
345 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
347 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
348 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
349 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
350 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
352 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
353 goto nla_put_failure;
361 hash_netnet6_data_next(struct hash_netnet6_elem *next,
362 const struct hash_netnet6_elem *d)
369 #define MTYPE hash_netnet6
370 #define HOST_MASK 128
371 #define IP_SET_EMIT_CREATE
372 #include "ip_set_hash_gen.h"
375 hash_netnet6_init(struct hash_netnet6_elem *e)
377 e->cidr[0] = HOST_MASK;
378 e->cidr[1] = HOST_MASK;
382 hash_netnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
383 const struct xt_action_param *par,
384 enum ipset_adt adt, struct ip_set_adt_opt *opt)
386 const struct hash_netnet6 *h = set->data;
387 ipset_adtfn adtfn = set->variant->adt[adt];
388 struct hash_netnet6_elem e = { };
389 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
391 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
392 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
393 if (adt == IPSET_TEST)
394 e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
396 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
397 ip6addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1].in6);
398 ip6_netmask(&e.ip[0], e.cidr[0]);
399 ip6_netmask(&e.ip[1], e.cidr[1]);
401 nf_inet_addr_mask_inplace(&e.ip[0], &h->bitmask);
402 nf_inet_addr_mask_inplace(&e.ip[1], &h->bitmask);
403 if (e.cidr[0] == HOST_MASK && ipv6_addr_any(&e.ip[0].in6))
406 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
410 hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
411 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
413 ipset_adtfn adtfn = set->variant->adt[adt];
414 struct hash_netnet6_elem e = { };
415 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
416 const struct hash_netnet6 *h = set->data;
419 if (tb[IPSET_ATTR_LINENO])
420 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
422 hash_netnet6_init(&e);
423 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
424 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
425 return -IPSET_ERR_PROTOCOL;
426 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
427 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
429 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]);
433 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]);
437 ret = ip_set_get_extensions(set, tb, &ext);
441 if (tb[IPSET_ATTR_CIDR]) {
442 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
443 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
444 return -IPSET_ERR_INVALID_CIDR;
447 if (tb[IPSET_ATTR_CIDR2]) {
448 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
449 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
450 return -IPSET_ERR_INVALID_CIDR;
453 ip6_netmask(&e.ip[0], e.cidr[0]);
454 ip6_netmask(&e.ip[1], e.cidr[1]);
456 nf_inet_addr_mask_inplace(&e.ip[0], &h->bitmask);
457 nf_inet_addr_mask_inplace(&e.ip[1], &h->bitmask);
458 if (e.cidr[0] == HOST_MASK && ipv6_addr_any(&e.ip[0].in6))
459 return -IPSET_ERR_HASH_ELEM;
461 if (tb[IPSET_ATTR_CADT_FLAGS]) {
462 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
464 if (cadt_flags & IPSET_FLAG_NOMATCH)
465 flags |= (IPSET_FLAG_NOMATCH << 16);
468 ret = adtfn(set, &e, &ext, &ext, flags);
470 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
471 ip_set_eexist(ret, flags) ? 0 : ret;
474 static struct ip_set_type hash_netnet_type __read_mostly = {
475 .name = "hash:net,net",
476 .protocol = IPSET_PROTOCOL,
477 .features = IPSET_TYPE_IP | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH,
478 .dimension = IPSET_DIM_TWO,
479 .family = NFPROTO_UNSPEC,
480 .revision_min = IPSET_TYPE_REV_MIN,
481 .revision_max = IPSET_TYPE_REV_MAX,
482 .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
483 .create = hash_netnet_create,
485 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
486 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
487 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
488 [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
489 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
490 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
491 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
492 [IPSET_ATTR_NETMASK] = { .type = NLA_U8 },
493 [IPSET_ATTR_BITMASK] = { .type = NLA_NESTED },
496 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
497 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
498 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
499 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
500 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
501 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
502 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
503 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
504 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
505 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
506 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
507 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
508 .len = IPSET_MAX_COMMENT_SIZE },
509 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
510 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
511 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
517 hash_netnet_init(void)
519 return ip_set_type_register(&hash_netnet_type);
523 hash_netnet_fini(void)
526 ip_set_type_unregister(&hash_netnet_type);
529 module_init(hash_netnet_init);
530 module_exit(hash_netnet_fini);