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;
174 if (tb[IPSET_ATTR_LINENO])
175 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
177 hash_netnet4_init(&e);
178 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
179 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
180 return -IPSET_ERR_PROTOCOL;
182 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
186 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
190 ret = ip_set_get_extensions(set, tb, &ext);
194 if (tb[IPSET_ATTR_CIDR]) {
195 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
196 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
197 return -IPSET_ERR_INVALID_CIDR;
200 if (tb[IPSET_ATTR_CIDR2]) {
201 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
202 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
203 return -IPSET_ERR_INVALID_CIDR;
206 if (tb[IPSET_ATTR_CADT_FLAGS]) {
207 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
209 if (cadt_flags & IPSET_FLAG_NOMATCH)
210 flags |= (IPSET_FLAG_NOMATCH << 16);
213 if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
214 tb[IPSET_ATTR_IP2_TO])) {
215 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
216 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
217 ret = adtfn(set, &e, &ext, &ext, flags);
218 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
219 ip_set_eexist(ret, flags) ? 0 : ret;
223 if (tb[IPSET_ATTR_IP_TO]) {
224 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
229 if (unlikely(ip + UINT_MAX == ip_to))
230 return -IPSET_ERR_HASH_RANGE;
232 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
236 if (tb[IPSET_ATTR_IP2_TO]) {
237 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
240 if (ip2_to < ip2_from)
241 swap(ip2_from, ip2_to);
242 if (unlikely(ip2_from + UINT_MAX == ip2_to))
243 return -IPSET_ERR_HASH_RANGE;
245 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
249 ip = ntohl(h->next.ip[0]);
250 ip2 = ntohl(h->next.ip[1]);
257 ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
259 e.ip[1] = htonl(ip2);
260 ip2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
261 ret = adtfn(set, &e, &ext, &ext, flags);
262 if (ret && !ip_set_eexist(ret, flags))
266 } while (ip2++ < ip2_to);
268 } while (ip++ < ip_to);
274 struct hash_netnet6_elem {
275 union nf_inet_addr ip[2];
284 /* Common functions */
287 hash_netnet6_data_equal(const struct hash_netnet6_elem *ip1,
288 const struct hash_netnet6_elem *ip2,
291 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
292 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
293 ip1->ccmp == ip2->ccmp;
297 hash_netnet6_do_data_match(const struct hash_netnet6_elem *elem)
299 return elem->nomatch ? -ENOTEMPTY : 1;
303 hash_netnet6_data_set_flags(struct hash_netnet6_elem *elem, u32 flags)
305 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
309 hash_netnet6_data_reset_flags(struct hash_netnet6_elem *elem, u8 *flags)
311 swap(*flags, elem->nomatch);
315 hash_netnet6_data_reset_elem(struct hash_netnet6_elem *elem,
316 struct hash_netnet6_elem *orig)
318 elem->ip[1] = orig->ip[1];
322 hash_netnet6_data_netmask(struct hash_netnet6_elem *elem, u8 cidr, bool inner)
325 ip6_netmask(&elem->ip[1], cidr);
326 elem->cidr[1] = cidr;
328 ip6_netmask(&elem->ip[0], cidr);
329 elem->cidr[0] = cidr;
334 hash_netnet6_data_list(struct sk_buff *skb,
335 const struct hash_netnet6_elem *data)
337 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
339 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
340 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
341 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
342 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
344 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
345 goto nla_put_failure;
353 hash_netnet6_data_next(struct hash_netnet6_elem *next,
354 const struct hash_netnet6_elem *d)
361 #define MTYPE hash_netnet6
362 #define HOST_MASK 128
363 #define IP_SET_EMIT_CREATE
364 #include "ip_set_hash_gen.h"
367 hash_netnet6_init(struct hash_netnet6_elem *e)
369 e->cidr[0] = HOST_MASK;
370 e->cidr[1] = HOST_MASK;
374 hash_netnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
375 const struct xt_action_param *par,
376 enum ipset_adt adt, struct ip_set_adt_opt *opt)
378 const struct hash_netnet6 *h = set->data;
379 ipset_adtfn adtfn = set->variant->adt[adt];
380 struct hash_netnet6_elem e = { };
381 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
383 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
384 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
385 if (adt == IPSET_TEST)
386 e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
388 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
389 ip6addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1].in6);
390 ip6_netmask(&e.ip[0], e.cidr[0]);
391 ip6_netmask(&e.ip[1], e.cidr[1]);
393 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
397 hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
398 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
400 ipset_adtfn adtfn = set->variant->adt[adt];
401 struct hash_netnet6_elem e = { };
402 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
405 if (tb[IPSET_ATTR_LINENO])
406 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
408 hash_netnet6_init(&e);
409 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
410 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
411 return -IPSET_ERR_PROTOCOL;
412 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
413 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
415 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]);
419 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]);
423 ret = ip_set_get_extensions(set, tb, &ext);
427 if (tb[IPSET_ATTR_CIDR]) {
428 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
429 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
430 return -IPSET_ERR_INVALID_CIDR;
433 if (tb[IPSET_ATTR_CIDR2]) {
434 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
435 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
436 return -IPSET_ERR_INVALID_CIDR;
439 ip6_netmask(&e.ip[0], e.cidr[0]);
440 ip6_netmask(&e.ip[1], e.cidr[1]);
442 if (tb[IPSET_ATTR_CADT_FLAGS]) {
443 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
445 if (cadt_flags & IPSET_FLAG_NOMATCH)
446 flags |= (IPSET_FLAG_NOMATCH << 16);
449 ret = adtfn(set, &e, &ext, &ext, flags);
451 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
452 ip_set_eexist(ret, flags) ? 0 : ret;
455 static struct ip_set_type hash_netnet_type __read_mostly = {
456 .name = "hash:net,net",
457 .protocol = IPSET_PROTOCOL,
458 .features = IPSET_TYPE_IP | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH,
459 .dimension = IPSET_DIM_TWO,
460 .family = NFPROTO_UNSPEC,
461 .revision_min = IPSET_TYPE_REV_MIN,
462 .revision_max = IPSET_TYPE_REV_MAX,
463 .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
464 .create = hash_netnet_create,
466 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
467 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
468 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
469 [IPSET_ATTR_BUCKETSIZE] = { .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_LINENO] = { .type = NLA_U32 },
483 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
484 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
485 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
486 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
487 .len = IPSET_MAX_COMMENT_SIZE },
488 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
489 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
490 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
496 hash_netnet_init(void)
498 return ip_set_type_register(&hash_netnet_type);
502 hash_netnet_fini(void)
505 ip_set_type_unregister(&hash_netnet_type);
508 module_init(hash_netnet_init);
509 module_exit(hash_netnet_fini);