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 #define IPSET_TYPE_REV_MAX 3 /* bucketsize, initval support added */
28 MODULE_LICENSE("GPL");
29 MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
30 IP_SET_MODULE_DESC("hash:net,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
31 MODULE_ALIAS("ip_set_hash:net,net");
33 /* Type specific function prefix */
34 #define HTYPE hash_netnet
35 #define IP_SET_HASH_WITH_NETS
36 #define IPSET_NET_COUNT 2
41 struct hash_netnet4_elem {
54 /* Common functions */
57 hash_netnet4_data_equal(const struct hash_netnet4_elem *ip1,
58 const struct hash_netnet4_elem *ip2,
61 return ip1->ipcmp == ip2->ipcmp &&
62 ip1->ccmp == ip2->ccmp;
66 hash_netnet4_do_data_match(const struct hash_netnet4_elem *elem)
68 return elem->nomatch ? -ENOTEMPTY : 1;
72 hash_netnet4_data_set_flags(struct hash_netnet4_elem *elem, u32 flags)
74 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
78 hash_netnet4_data_reset_flags(struct hash_netnet4_elem *elem, u8 *flags)
80 swap(*flags, elem->nomatch);
84 hash_netnet4_data_reset_elem(struct hash_netnet4_elem *elem,
85 struct hash_netnet4_elem *orig)
87 elem->ip[1] = orig->ip[1];
91 hash_netnet4_data_netmask(struct hash_netnet4_elem *elem, u8 cidr, bool inner)
94 elem->ip[1] &= ip_set_netmask(cidr);
97 elem->ip[0] &= ip_set_netmask(cidr);
103 hash_netnet4_data_list(struct sk_buff *skb,
104 const struct hash_netnet4_elem *data)
106 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
108 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
109 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
110 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
111 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
113 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
114 goto nla_put_failure;
122 hash_netnet4_data_next(struct hash_netnet4_elem *next,
123 const struct hash_netnet4_elem *d)
125 next->ipcmp = d->ipcmp;
128 #define MTYPE hash_netnet4
130 #include "ip_set_hash_gen.h"
133 hash_netnet4_init(struct hash_netnet4_elem *e)
135 e->cidr[0] = HOST_MASK;
136 e->cidr[1] = HOST_MASK;
140 hash_netnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
141 const struct xt_action_param *par,
142 enum ipset_adt adt, struct ip_set_adt_opt *opt)
144 const struct hash_netnet4 *h = set->data;
145 ipset_adtfn adtfn = set->variant->adt[adt];
146 struct hash_netnet4_elem e = { };
147 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
149 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
150 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
151 if (adt == IPSET_TEST)
152 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
154 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
155 ip4addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1]);
156 e.ip[0] &= ip_set_netmask(e.cidr[0]);
157 e.ip[1] &= ip_set_netmask(e.cidr[1]);
159 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
163 hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
164 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
166 const struct hash_netnet4 *h = set->data;
167 ipset_adtfn adtfn = set->variant->adt[adt];
168 struct hash_netnet4_elem e = { };
169 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
170 u32 ip = 0, ip_to = 0;
171 u32 ip2 = 0, ip2_from = 0, ip2_to = 0, ipn;
175 if (tb[IPSET_ATTR_LINENO])
176 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
178 hash_netnet4_init(&e);
179 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
180 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
181 return -IPSET_ERR_PROTOCOL;
183 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
187 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
191 ret = ip_set_get_extensions(set, tb, &ext);
195 if (tb[IPSET_ATTR_CIDR]) {
196 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
197 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
198 return -IPSET_ERR_INVALID_CIDR;
201 if (tb[IPSET_ATTR_CIDR2]) {
202 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
203 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
204 return -IPSET_ERR_INVALID_CIDR;
207 if (tb[IPSET_ATTR_CADT_FLAGS]) {
208 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
210 if (cadt_flags & IPSET_FLAG_NOMATCH)
211 flags |= (IPSET_FLAG_NOMATCH << 16);
214 if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
215 tb[IPSET_ATTR_IP2_TO])) {
216 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
217 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
218 ret = adtfn(set, &e, &ext, &ext, flags);
219 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
220 ip_set_eexist(ret, flags) ? 0 : ret;
224 if (tb[IPSET_ATTR_IP_TO]) {
225 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
230 if (unlikely(ip + UINT_MAX == ip_to))
231 return -IPSET_ERR_HASH_RANGE;
233 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
237 if (tb[IPSET_ATTR_IP2_TO]) {
238 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
241 if (ip2_to < ip2_from)
242 swap(ip2_from, ip2_to);
243 if (unlikely(ip2_from + UINT_MAX == ip2_to))
244 return -IPSET_ERR_HASH_RANGE;
246 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
250 ipn = ip_set_range_to_cidr(ipn, ip_to, &e.cidr[0]);
252 } while (ipn++ < ip_to);
255 ipn = ip_set_range_to_cidr(ipn, ip2_to, &e.cidr[1]);
257 } while (ipn++ < ip2_to);
259 if (n*m > IPSET_MAX_RANGE)
263 ip = ntohl(h->next.ip[0]);
264 ip2 = ntohl(h->next.ip[1]);
271 ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
273 e.ip[1] = htonl(ip2);
274 ip2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
275 ret = adtfn(set, &e, &ext, &ext, flags);
276 if (ret && !ip_set_eexist(ret, flags))
280 } while (ip2++ < ip2_to);
282 } while (ip++ < ip_to);
288 struct hash_netnet6_elem {
289 union nf_inet_addr ip[2];
298 /* Common functions */
301 hash_netnet6_data_equal(const struct hash_netnet6_elem *ip1,
302 const struct hash_netnet6_elem *ip2,
305 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
306 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
307 ip1->ccmp == ip2->ccmp;
311 hash_netnet6_do_data_match(const struct hash_netnet6_elem *elem)
313 return elem->nomatch ? -ENOTEMPTY : 1;
317 hash_netnet6_data_set_flags(struct hash_netnet6_elem *elem, u32 flags)
319 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
323 hash_netnet6_data_reset_flags(struct hash_netnet6_elem *elem, u8 *flags)
325 swap(*flags, elem->nomatch);
329 hash_netnet6_data_reset_elem(struct hash_netnet6_elem *elem,
330 struct hash_netnet6_elem *orig)
332 elem->ip[1] = orig->ip[1];
336 hash_netnet6_data_netmask(struct hash_netnet6_elem *elem, u8 cidr, bool inner)
339 ip6_netmask(&elem->ip[1], cidr);
340 elem->cidr[1] = cidr;
342 ip6_netmask(&elem->ip[0], cidr);
343 elem->cidr[0] = cidr;
348 hash_netnet6_data_list(struct sk_buff *skb,
349 const struct hash_netnet6_elem *data)
351 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
353 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
354 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
355 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
356 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
358 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
359 goto nla_put_failure;
367 hash_netnet6_data_next(struct hash_netnet6_elem *next,
368 const struct hash_netnet6_elem *d)
375 #define MTYPE hash_netnet6
376 #define HOST_MASK 128
377 #define IP_SET_EMIT_CREATE
378 #include "ip_set_hash_gen.h"
381 hash_netnet6_init(struct hash_netnet6_elem *e)
383 e->cidr[0] = HOST_MASK;
384 e->cidr[1] = HOST_MASK;
388 hash_netnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
389 const struct xt_action_param *par,
390 enum ipset_adt adt, struct ip_set_adt_opt *opt)
392 const struct hash_netnet6 *h = set->data;
393 ipset_adtfn adtfn = set->variant->adt[adt];
394 struct hash_netnet6_elem e = { };
395 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
397 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
398 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
399 if (adt == IPSET_TEST)
400 e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
402 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
403 ip6addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1].in6);
404 ip6_netmask(&e.ip[0], e.cidr[0]);
405 ip6_netmask(&e.ip[1], e.cidr[1]);
407 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
411 hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
412 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
414 ipset_adtfn adtfn = set->variant->adt[adt];
415 struct hash_netnet6_elem e = { };
416 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
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 if (tb[IPSET_ATTR_CADT_FLAGS]) {
457 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
459 if (cadt_flags & IPSET_FLAG_NOMATCH)
460 flags |= (IPSET_FLAG_NOMATCH << 16);
463 ret = adtfn(set, &e, &ext, &ext, flags);
465 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
466 ip_set_eexist(ret, flags) ? 0 : ret;
469 static struct ip_set_type hash_netnet_type __read_mostly = {
470 .name = "hash:net,net",
471 .protocol = IPSET_PROTOCOL,
472 .features = IPSET_TYPE_IP | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH,
473 .dimension = IPSET_DIM_TWO,
474 .family = NFPROTO_UNSPEC,
475 .revision_min = IPSET_TYPE_REV_MIN,
476 .revision_max = IPSET_TYPE_REV_MAX,
477 .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
478 .create = hash_netnet_create,
480 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
481 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
482 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
483 [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
484 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
485 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
486 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
489 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
490 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
491 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
492 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
493 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
494 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
495 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
496 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
497 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
498 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
499 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
500 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
501 .len = IPSET_MAX_COMMENT_SIZE },
502 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
503 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
504 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
510 hash_netnet_init(void)
512 return ip_set_type_register(&hash_netnet_type);
516 hash_netnet_fini(void)
519 ip_set_type_unregister(&hash_netnet_type);
522 module_init(hash_netnet_init);
523 module_exit(hash_netnet_fini);