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 {
55 /* Common functions */
58 hash_netnet4_data_equal(const struct hash_netnet4_elem *ip1,
59 const struct hash_netnet4_elem *ip2,
62 return ip1->ipcmp == ip2->ipcmp &&
63 ip1->ccmp == ip2->ccmp;
67 hash_netnet4_do_data_match(const struct hash_netnet4_elem *elem)
69 return elem->nomatch ? -ENOTEMPTY : 1;
73 hash_netnet4_data_set_flags(struct hash_netnet4_elem *elem, u32 flags)
75 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
79 hash_netnet4_data_reset_flags(struct hash_netnet4_elem *elem, u8 *flags)
81 swap(*flags, elem->nomatch);
85 hash_netnet4_data_reset_elem(struct hash_netnet4_elem *elem,
86 struct hash_netnet4_elem *orig)
88 elem->ip[1] = orig->ip[1];
92 hash_netnet4_data_netmask(struct hash_netnet4_elem *elem, u8 cidr, bool inner)
95 elem->ip[1] &= ip_set_netmask(cidr);
98 elem->ip[0] &= ip_set_netmask(cidr);
104 hash_netnet4_data_list(struct sk_buff *skb,
105 const struct hash_netnet4_elem *data)
107 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
109 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
110 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
111 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
112 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
114 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
115 goto nla_put_failure;
123 hash_netnet4_data_next(struct hash_netnet4_elem *next,
124 const struct hash_netnet4_elem *d)
126 next->ipcmp = d->ipcmp;
129 #define MTYPE hash_netnet4
132 #include "ip_set_hash_gen.h"
135 hash_netnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
136 const struct xt_action_param *par,
137 enum ipset_adt adt, struct ip_set_adt_opt *opt)
139 const struct hash_netnet *h = set->data;
140 ipset_adtfn adtfn = set->variant->adt[adt];
141 struct hash_netnet4_elem e = { };
142 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
144 e.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
145 e.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
146 if (adt == IPSET_TEST)
147 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
149 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
150 ip4addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1]);
151 e.ip[0] &= ip_set_netmask(e.cidr[0]);
152 e.ip[1] &= ip_set_netmask(e.cidr[1]);
154 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
158 hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
159 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
161 const struct hash_netnet *h = set->data;
162 ipset_adtfn adtfn = set->variant->adt[adt];
163 struct hash_netnet4_elem e = { };
164 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
165 u32 ip = 0, ip_to = 0, last;
166 u32 ip2 = 0, ip2_from = 0, ip2_to = 0, last2;
170 e.cidr[0] = e.cidr[1] = HOST_MASK;
171 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
172 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
173 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
174 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
175 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
176 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
177 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
178 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
179 return -IPSET_ERR_PROTOCOL;
181 if (tb[IPSET_ATTR_LINENO])
182 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
184 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip) ||
185 ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from) ||
186 ip_set_get_extensions(set, tb, &ext);
190 if (tb[IPSET_ATTR_CIDR]) {
191 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
192 if (!cidr || cidr > HOST_MASK)
193 return -IPSET_ERR_INVALID_CIDR;
197 if (tb[IPSET_ATTR_CIDR2]) {
198 cidr2 = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
199 if (!cidr2 || cidr2 > HOST_MASK)
200 return -IPSET_ERR_INVALID_CIDR;
204 if (tb[IPSET_ATTR_CADT_FLAGS]) {
205 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
206 if (cadt_flags & IPSET_FLAG_NOMATCH)
207 flags |= (IPSET_FLAG_NOMATCH << 16);
210 if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
211 tb[IPSET_ATTR_IP2_TO])) {
212 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
213 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
214 ret = adtfn(set, &e, &ext, &ext, flags);
215 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
216 ip_set_eexist(ret, flags) ? 0 : ret;
220 if (tb[IPSET_ATTR_IP_TO]) {
221 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
226 if (unlikely(ip + UINT_MAX == ip_to))
227 return -IPSET_ERR_HASH_RANGE;
229 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
232 if (tb[IPSET_ATTR_IP2_TO]) {
233 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
236 if (ip2_to < ip2_from)
237 swap(ip2_from, ip2_to);
238 if (unlikely(ip2_from + UINT_MAX == ip2_to))
239 return -IPSET_ERR_HASH_RANGE;
241 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
244 ip = ntohl(h->next.ip[0]);
246 while (!after(ip, ip_to)) {
248 last = ip_set_range_to_cidr(ip, ip_to, &cidr);
251 ip == ntohl(h->next.ip[0])) ? ntohl(h->next.ip[1])
253 while (!after(ip2, ip2_to)) {
254 e.ip[1] = htonl(ip2);
255 last2 = ip_set_range_to_cidr(ip2, ip2_to, &cidr2);
257 ret = adtfn(set, &e, &ext, &ext, flags);
258 if (ret && !ip_set_eexist(ret, flags))
271 struct hash_netnet6_elem {
272 union nf_inet_addr ip[2];
280 /* Common functions */
283 hash_netnet6_data_equal(const struct hash_netnet6_elem *ip1,
284 const struct hash_netnet6_elem *ip2,
287 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
288 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
289 ip1->ccmp == ip2->ccmp;
293 hash_netnet6_do_data_match(const struct hash_netnet6_elem *elem)
295 return elem->nomatch ? -ENOTEMPTY : 1;
299 hash_netnet6_data_set_flags(struct hash_netnet6_elem *elem, u32 flags)
301 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
305 hash_netnet6_data_reset_flags(struct hash_netnet6_elem *elem, u8 *flags)
307 swap(*flags, elem->nomatch);
311 hash_netnet6_data_reset_elem(struct hash_netnet6_elem *elem,
312 struct hash_netnet6_elem *orig)
314 elem->ip[1] = orig->ip[1];
318 hash_netnet6_data_netmask(struct hash_netnet6_elem *elem, u8 cidr, bool inner)
321 ip6_netmask(&elem->ip[1], cidr);
322 elem->cidr[1] = cidr;
324 ip6_netmask(&elem->ip[0], cidr);
325 elem->cidr[0] = cidr;
330 hash_netnet6_data_list(struct sk_buff *skb,
331 const struct hash_netnet6_elem *data)
333 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
335 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
336 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
337 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
338 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
340 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
341 goto nla_put_failure;
349 hash_netnet6_data_next(struct hash_netnet4_elem *next,
350 const struct hash_netnet6_elem *d)
358 #define MTYPE hash_netnet6
360 #define HOST_MASK 128
361 #define IP_SET_EMIT_CREATE
362 #include "ip_set_hash_gen.h"
365 hash_netnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
366 const struct xt_action_param *par,
367 enum ipset_adt adt, struct ip_set_adt_opt *opt)
369 const struct hash_netnet *h = set->data;
370 ipset_adtfn adtfn = set->variant->adt[adt];
371 struct hash_netnet6_elem e = { };
372 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
374 e.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
375 e.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
376 if (adt == IPSET_TEST)
377 e.ccmp = (HOST_MASK << (sizeof(u8)*8)) | HOST_MASK;
379 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
380 ip6addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1].in6);
381 ip6_netmask(&e.ip[0], e.cidr[0]);
382 ip6_netmask(&e.ip[1], e.cidr[1]);
384 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
388 hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
389 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
391 ipset_adtfn adtfn = set->variant->adt[adt];
392 struct hash_netnet6_elem e = { };
393 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
396 e.cidr[0] = e.cidr[1] = HOST_MASK;
397 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
398 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
399 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
400 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
401 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
402 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
403 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
404 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
405 return -IPSET_ERR_PROTOCOL;
406 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
407 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
409 if (tb[IPSET_ATTR_LINENO])
410 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
412 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]) ||
413 ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]) ||
414 ip_set_get_extensions(set, tb, &ext);
418 if (tb[IPSET_ATTR_CIDR])
419 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
421 if (tb[IPSET_ATTR_CIDR2])
422 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
424 if (!e.cidr[0] || e.cidr[0] > HOST_MASK || !e.cidr[1] ||
425 e.cidr[1] > HOST_MASK)
426 return -IPSET_ERR_INVALID_CIDR;
428 ip6_netmask(&e.ip[0], e.cidr[0]);
429 ip6_netmask(&e.ip[1], e.cidr[1]);
431 if (tb[IPSET_ATTR_CADT_FLAGS]) {
432 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
433 if (cadt_flags & IPSET_FLAG_NOMATCH)
434 flags |= (IPSET_FLAG_NOMATCH << 16);
437 ret = adtfn(set, &e, &ext, &ext, flags);
439 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
440 ip_set_eexist(ret, flags) ? 0 : ret;
443 static struct ip_set_type hash_netnet_type __read_mostly = {
444 .name = "hash:net,net",
445 .protocol = IPSET_PROTOCOL,
446 .features = IPSET_TYPE_IP | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH,
447 .dimension = IPSET_DIM_TWO,
448 .family = NFPROTO_UNSPEC,
449 .revision_min = IPSET_TYPE_REV_MIN,
450 .revision_max = IPSET_TYPE_REV_MAX,
451 .create = hash_netnet_create,
453 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
454 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
455 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
456 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
457 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
458 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
461 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
462 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
463 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
464 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
465 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
466 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
467 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
468 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
469 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
470 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
471 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
472 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
473 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
474 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
480 hash_netnet_init(void)
482 return ip_set_type_register(&hash_netnet_type);
486 hash_netnet_fini(void)
488 ip_set_type_unregister(&hash_netnet_type);
491 module_init(hash_netnet_init);
492 module_exit(hash_netnet_fini);