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8#include <linux/jhash.h>
9#include <linux/module.h>
10#include <linux/ip.h>
11#include <linux/skbuff.h>
12#include <linux/errno.h>
13#include <linux/random.h>
14#include <net/ip.h>
15#include <net/ipv6.h>
16#include <net/netlink.h>
17
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>
22
23#define IPSET_TYPE_REV_MIN 0
24
25#define IPSET_TYPE_REV_MAX 2
26
27MODULE_LICENSE("GPL");
28MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
29IP_SET_MODULE_DESC("hash:net,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
30MODULE_ALIAS("ip_set_hash:net,net");
31
32
33#define HTYPE hash_netnet
34#define IP_SET_HASH_WITH_NETS
35#define IPSET_NET_COUNT 2
36
37
38
39
40struct hash_netnet4_elem {
41 union {
42 __be32 ip[2];
43 __be64 ipcmp;
44 };
45 u8 nomatch;
46 u8 padding;
47 union {
48 u8 cidr[2];
49 u16 ccmp;
50 };
51};
52
53
54
55static inline bool
56hash_netnet4_data_equal(const struct hash_netnet4_elem *ip1,
57 const struct hash_netnet4_elem *ip2,
58 u32 *multi)
59{
60 return ip1->ipcmp == ip2->ipcmp &&
61 ip1->ccmp == ip2->ccmp;
62}
63
64static inline int
65hash_netnet4_do_data_match(const struct hash_netnet4_elem *elem)
66{
67 return elem->nomatch ? -ENOTEMPTY : 1;
68}
69
70static inline void
71hash_netnet4_data_set_flags(struct hash_netnet4_elem *elem, u32 flags)
72{
73 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
74}
75
76static inline void
77hash_netnet4_data_reset_flags(struct hash_netnet4_elem *elem, u8 *flags)
78{
79 swap(*flags, elem->nomatch);
80}
81
82static inline void
83hash_netnet4_data_reset_elem(struct hash_netnet4_elem *elem,
84 struct hash_netnet4_elem *orig)
85{
86 elem->ip[1] = orig->ip[1];
87}
88
89static inline void
90hash_netnet4_data_netmask(struct hash_netnet4_elem *elem, u8 cidr, bool inner)
91{
92 if (inner) {
93 elem->ip[1] &= ip_set_netmask(cidr);
94 elem->cidr[1] = cidr;
95 } else {
96 elem->ip[0] &= ip_set_netmask(cidr);
97 elem->cidr[0] = cidr;
98 }
99}
100
101static bool
102hash_netnet4_data_list(struct sk_buff *skb,
103 const struct hash_netnet4_elem *data)
104{
105 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
106
107 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
108 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
109 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
110 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
111 (flags &&
112 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
113 goto nla_put_failure;
114 return false;
115
116nla_put_failure:
117 return true;
118}
119
120static inline void
121hash_netnet4_data_next(struct hash_netnet4_elem *next,
122 const struct hash_netnet4_elem *d)
123{
124 next->ipcmp = d->ipcmp;
125}
126
127#define MTYPE hash_netnet4
128#define HOST_MASK 32
129#include "ip_set_hash_gen.h"
130
131static void
132hash_netnet4_init(struct hash_netnet4_elem *e)
133{
134 e->cidr[0] = HOST_MASK;
135 e->cidr[1] = HOST_MASK;
136}
137
138static int
139hash_netnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
140 const struct xt_action_param *par,
141 enum ipset_adt adt, struct ip_set_adt_opt *opt)
142{
143 const struct hash_netnet4 *h = set->data;
144 ipset_adtfn adtfn = set->variant->adt[adt];
145 struct hash_netnet4_elem e = { };
146 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
147
148 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
149 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
150 if (adt == IPSET_TEST)
151 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
152
153 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
154 ip4addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1]);
155 e.ip[0] &= ip_set_netmask(e.cidr[0]);
156 e.ip[1] &= ip_set_netmask(e.cidr[1]);
157
158 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
159}
160
161static int
162hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
163 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
164{
165 const struct hash_netnet4 *h = set->data;
166 ipset_adtfn adtfn = set->variant->adt[adt];
167 struct hash_netnet4_elem e = { };
168 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
169 u32 ip = 0, ip_to = 0;
170 u32 ip2 = 0, ip2_from = 0, ip2_to = 0;
171 int ret;
172
173 if (tb[IPSET_ATTR_LINENO])
174 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
175
176 hash_netnet4_init(&e);
177 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
178 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
179 return -IPSET_ERR_PROTOCOL;
180
181 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
182 if (ret)
183 return ret;
184
185 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
186 if (ret)
187 return ret;
188
189 ret = ip_set_get_extensions(set, tb, &ext);
190 if (ret)
191 return ret;
192
193 if (tb[IPSET_ATTR_CIDR]) {
194 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
195 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
196 return -IPSET_ERR_INVALID_CIDR;
197 }
198
199 if (tb[IPSET_ATTR_CIDR2]) {
200 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
201 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
202 return -IPSET_ERR_INVALID_CIDR;
203 }
204
205 if (tb[IPSET_ATTR_CADT_FLAGS]) {
206 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
207
208 if (cadt_flags & IPSET_FLAG_NOMATCH)
209 flags |= (IPSET_FLAG_NOMATCH << 16);
210 }
211
212 if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
213 tb[IPSET_ATTR_IP2_TO])) {
214 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
215 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
216 ret = adtfn(set, &e, &ext, &ext, flags);
217 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
218 ip_set_eexist(ret, flags) ? 0 : ret;
219 }
220
221 ip_to = ip;
222 if (tb[IPSET_ATTR_IP_TO]) {
223 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
224 if (ret)
225 return ret;
226 if (ip_to < ip)
227 swap(ip, ip_to);
228 if (unlikely(ip + UINT_MAX == ip_to))
229 return -IPSET_ERR_HASH_RANGE;
230 } else {
231 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
232 }
233
234 ip2_to = ip2_from;
235 if (tb[IPSET_ATTR_IP2_TO]) {
236 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
237 if (ret)
238 return ret;
239 if (ip2_to < ip2_from)
240 swap(ip2_from, ip2_to);
241 if (unlikely(ip2_from + UINT_MAX == ip2_to))
242 return -IPSET_ERR_HASH_RANGE;
243 } else {
244 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
245 }
246
247 if (retried) {
248 ip = ntohl(h->next.ip[0]);
249 ip2 = ntohl(h->next.ip[1]);
250 } else {
251 ip2 = ip2_from;
252 }
253
254 do {
255 e.ip[0] = htonl(ip);
256 ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
257 do {
258 e.ip[1] = htonl(ip2);
259 ip2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
260 ret = adtfn(set, &e, &ext, &ext, flags);
261 if (ret && !ip_set_eexist(ret, flags))
262 return ret;
263
264 ret = 0;
265 } while (ip2++ < ip2_to);
266 ip2 = ip2_from;
267 } while (ip++ < ip_to);
268 return ret;
269}
270
271
272
273struct hash_netnet6_elem {
274 union nf_inet_addr ip[2];
275 u8 nomatch;
276 u8 padding;
277 union {
278 u8 cidr[2];
279 u16 ccmp;
280 };
281};
282
283
284
285static inline bool
286hash_netnet6_data_equal(const struct hash_netnet6_elem *ip1,
287 const struct hash_netnet6_elem *ip2,
288 u32 *multi)
289{
290 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
291 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
292 ip1->ccmp == ip2->ccmp;
293}
294
295static inline int
296hash_netnet6_do_data_match(const struct hash_netnet6_elem *elem)
297{
298 return elem->nomatch ? -ENOTEMPTY : 1;
299}
300
301static inline void
302hash_netnet6_data_set_flags(struct hash_netnet6_elem *elem, u32 flags)
303{
304 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
305}
306
307static inline void
308hash_netnet6_data_reset_flags(struct hash_netnet6_elem *elem, u8 *flags)
309{
310 swap(*flags, elem->nomatch);
311}
312
313static inline void
314hash_netnet6_data_reset_elem(struct hash_netnet6_elem *elem,
315 struct hash_netnet6_elem *orig)
316{
317 elem->ip[1] = orig->ip[1];
318}
319
320static inline void
321hash_netnet6_data_netmask(struct hash_netnet6_elem *elem, u8 cidr, bool inner)
322{
323 if (inner) {
324 ip6_netmask(&elem->ip[1], cidr);
325 elem->cidr[1] = cidr;
326 } else {
327 ip6_netmask(&elem->ip[0], cidr);
328 elem->cidr[0] = cidr;
329 }
330}
331
332static bool
333hash_netnet6_data_list(struct sk_buff *skb,
334 const struct hash_netnet6_elem *data)
335{
336 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
337
338 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
339 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
340 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
341 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
342 (flags &&
343 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
344 goto nla_put_failure;
345 return false;
346
347nla_put_failure:
348 return true;
349}
350
351static inline void
352hash_netnet6_data_next(struct hash_netnet6_elem *next,
353 const struct hash_netnet6_elem *d)
354{
355}
356
357#undef MTYPE
358#undef HOST_MASK
359
360#define MTYPE hash_netnet6
361#define HOST_MASK 128
362#define IP_SET_EMIT_CREATE
363#include "ip_set_hash_gen.h"
364
365static void
366hash_netnet6_init(struct hash_netnet6_elem *e)
367{
368 e->cidr[0] = HOST_MASK;
369 e->cidr[1] = HOST_MASK;
370}
371
372static int
373hash_netnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
374 const struct xt_action_param *par,
375 enum ipset_adt adt, struct ip_set_adt_opt *opt)
376{
377 const struct hash_netnet6 *h = set->data;
378 ipset_adtfn adtfn = set->variant->adt[adt];
379 struct hash_netnet6_elem e = { };
380 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
381
382 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
383 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
384 if (adt == IPSET_TEST)
385 e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
386
387 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
388 ip6addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1].in6);
389 ip6_netmask(&e.ip[0], e.cidr[0]);
390 ip6_netmask(&e.ip[1], e.cidr[1]);
391
392 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
393}
394
395static int
396hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
397 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
398{
399 ipset_adtfn adtfn = set->variant->adt[adt];
400 struct hash_netnet6_elem e = { };
401 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
402 int ret;
403
404 if (tb[IPSET_ATTR_LINENO])
405 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
406
407 hash_netnet6_init(&e);
408 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
409 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
410 return -IPSET_ERR_PROTOCOL;
411 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
412 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
413
414 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]);
415 if (ret)
416 return ret;
417
418 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]);
419 if (ret)
420 return ret;
421
422 ret = ip_set_get_extensions(set, tb, &ext);
423 if (ret)
424 return ret;
425
426 if (tb[IPSET_ATTR_CIDR]) {
427 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
428 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
429 return -IPSET_ERR_INVALID_CIDR;
430 }
431
432 if (tb[IPSET_ATTR_CIDR2]) {
433 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
434 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
435 return -IPSET_ERR_INVALID_CIDR;
436 }
437
438 ip6_netmask(&e.ip[0], e.cidr[0]);
439 ip6_netmask(&e.ip[1], e.cidr[1]);
440
441 if (tb[IPSET_ATTR_CADT_FLAGS]) {
442 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
443
444 if (cadt_flags & IPSET_FLAG_NOMATCH)
445 flags |= (IPSET_FLAG_NOMATCH << 16);
446 }
447
448 ret = adtfn(set, &e, &ext, &ext, flags);
449
450 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
451 ip_set_eexist(ret, flags) ? 0 : ret;
452}
453
454static struct ip_set_type hash_netnet_type __read_mostly = {
455 .name = "hash:net,net",
456 .protocol = IPSET_PROTOCOL,
457 .features = IPSET_TYPE_IP | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH,
458 .dimension = IPSET_DIM_TWO,
459 .family = NFPROTO_UNSPEC,
460 .revision_min = IPSET_TYPE_REV_MIN,
461 .revision_max = IPSET_TYPE_REV_MAX,
462 .create = hash_netnet_create,
463 .create_policy = {
464 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
465 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
466 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
467 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
468 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
469 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
470 },
471 .adt_policy = {
472 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
473 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
474 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
475 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
476 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
477 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
478 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
479 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
480 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
481 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
482 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
483 .len = IPSET_MAX_COMMENT_SIZE },
484 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
485 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
486 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
487 },
488 .me = THIS_MODULE,
489};
490
491static int __init
492hash_netnet_init(void)
493{
494 return ip_set_type_register(&hash_netnet_type);
495}
496
497static void __exit
498hash_netnet_fini(void)
499{
500 rcu_barrier();
501 ip_set_type_unregister(&hash_netnet_type);
502}
503
504module_init(hash_netnet_init);
505module_exit(hash_netnet_fini);
506
