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 {
56 /* Common functions */
59 hash_netnet4_data_equal(const struct hash_netnet4_elem *ip1,
60 const struct hash_netnet4_elem *ip2,
63 return ip1->ipcmp == ip2->ipcmp &&
64 ip1->ccmp == ip2->ccmp;
68 hash_netnet4_do_data_match(const struct hash_netnet4_elem *elem)
70 return elem->nomatch ? -ENOTEMPTY : 1;
74 hash_netnet4_data_set_flags(struct hash_netnet4_elem *elem, u32 flags)
76 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
80 hash_netnet4_data_reset_flags(struct hash_netnet4_elem *elem, u8 *flags)
82 swap(*flags, elem->nomatch);
86 hash_netnet4_data_reset_elem(struct hash_netnet4_elem *elem,
87 struct hash_netnet4_elem *orig)
89 elem->ip[1] = orig->ip[1];
93 hash_netnet4_data_netmask(struct hash_netnet4_elem *elem, u8 cidr, bool inner)
96 elem->ip[1] &= ip_set_netmask(cidr);
99 elem->ip[0] &= ip_set_netmask(cidr);
100 elem->cidr[0] = cidr;
105 hash_netnet4_data_list(struct sk_buff *skb,
106 const struct hash_netnet4_elem *data)
108 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
110 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
111 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
112 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
113 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
115 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
116 goto nla_put_failure;
124 hash_netnet4_data_next(struct hash_netnet4_elem *next,
125 const struct hash_netnet4_elem *d)
127 next->ipcmp = d->ipcmp;
130 #define MTYPE hash_netnet4
133 #include "ip_set_hash_gen.h"
136 hash_netnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
137 const struct xt_action_param *par,
138 enum ipset_adt adt, struct ip_set_adt_opt *opt)
140 const struct hash_netnet *h = set->data;
141 ipset_adtfn adtfn = set->variant->adt[adt];
142 struct hash_netnet4_elem e = { };
143 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
145 e.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
146 e.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
147 if (adt == IPSET_TEST)
148 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
150 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
151 ip4addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1]);
152 e.ip[0] &= ip_set_netmask(e.cidr[0]);
153 e.ip[1] &= ip_set_netmask(e.cidr[1]);
155 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
159 hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
160 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
162 const struct hash_netnet *h = set->data;
163 ipset_adtfn adtfn = set->variant->adt[adt];
164 struct hash_netnet4_elem e = { };
165 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
166 u32 ip = 0, ip_to = 0, last;
167 u32 ip2 = 0, ip2_from = 0, ip2_to = 0, last2;
171 e.cidr[0] = e.cidr[1] = HOST_MASK;
172 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
173 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
174 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
175 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
176 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
177 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
178 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
179 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
180 return -IPSET_ERR_PROTOCOL;
182 if (tb[IPSET_ATTR_LINENO])
183 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
185 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip) ||
186 ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from) ||
187 ip_set_get_extensions(set, tb, &ext);
191 if (tb[IPSET_ATTR_CIDR]) {
192 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
193 if (!cidr || cidr > HOST_MASK)
194 return -IPSET_ERR_INVALID_CIDR;
198 if (tb[IPSET_ATTR_CIDR2]) {
199 cidr2 = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
200 if (!cidr2 || cidr2 > HOST_MASK)
201 return -IPSET_ERR_INVALID_CIDR;
205 if (tb[IPSET_ATTR_CADT_FLAGS]) {
206 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
207 if (cadt_flags & IPSET_FLAG_NOMATCH)
208 flags |= (IPSET_FLAG_NOMATCH << 16);
211 if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
212 tb[IPSET_ATTR_IP2_TO])) {
213 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
214 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
215 ret = adtfn(set, &e, &ext, &ext, flags);
216 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
217 ip_set_eexist(ret, flags) ? 0 : ret;
221 if (tb[IPSET_ATTR_IP_TO]) {
222 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
227 if (unlikely(ip + UINT_MAX == ip_to))
228 return -IPSET_ERR_HASH_RANGE;
230 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
233 if (tb[IPSET_ATTR_IP2_TO]) {
234 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
237 if (ip2_to < ip2_from)
238 swap(ip2_from, ip2_to);
239 if (unlikely(ip2_from + UINT_MAX == ip2_to))
240 return -IPSET_ERR_HASH_RANGE;
242 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
245 ip = ntohl(h->next.ip[0]);
247 while (!after(ip, ip_to)) {
249 last = ip_set_range_to_cidr(ip, ip_to, &cidr);
252 ip == ntohl(h->next.ip[0])) ? ntohl(h->next.ip[1])
254 while (!after(ip2, ip2_to)) {
255 e.ip[1] = htonl(ip2);
256 last2 = ip_set_range_to_cidr(ip2, ip2_to, &cidr2);
258 ret = adtfn(set, &e, &ext, &ext, flags);
259 if (ret && !ip_set_eexist(ret, flags))
272 struct hash_netnet6_elem {
273 union nf_inet_addr ip[2];
282 /* Common functions */
285 hash_netnet6_data_equal(const struct hash_netnet6_elem *ip1,
286 const struct hash_netnet6_elem *ip2,
289 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
290 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
291 ip1->ccmp == ip2->ccmp;
295 hash_netnet6_do_data_match(const struct hash_netnet6_elem *elem)
297 return elem->nomatch ? -ENOTEMPTY : 1;
301 hash_netnet6_data_set_flags(struct hash_netnet6_elem *elem, u32 flags)
303 elem->nomatch = (flags >> 16) & IPSET_FLAG_NOMATCH;
307 hash_netnet6_data_reset_flags(struct hash_netnet6_elem *elem, u8 *flags)
309 swap(*flags, elem->nomatch);
313 hash_netnet6_data_reset_elem(struct hash_netnet6_elem *elem,
314 struct hash_netnet6_elem *orig)
316 elem->ip[1] = orig->ip[1];
320 hash_netnet6_data_netmask(struct hash_netnet6_elem *elem, u8 cidr, bool inner)
323 ip6_netmask(&elem->ip[1], cidr);
324 elem->cidr[1] = cidr;
326 ip6_netmask(&elem->ip[0], cidr);
327 elem->cidr[0] = cidr;
332 hash_netnet6_data_list(struct sk_buff *skb,
333 const struct hash_netnet6_elem *data)
335 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
337 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
338 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
339 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
340 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
342 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
343 goto nla_put_failure;
351 hash_netnet6_data_next(struct hash_netnet4_elem *next,
352 const struct hash_netnet6_elem *d)
360 #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_kadt(struct ip_set *set, const struct sk_buff *skb,
368 const struct xt_action_param *par,
369 enum ipset_adt adt, struct ip_set_adt_opt *opt)
371 const struct hash_netnet *h = set->data;
372 ipset_adtfn adtfn = set->variant->adt[adt];
373 struct hash_netnet6_elem e = { };
374 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
376 e.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
377 e.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
378 if (adt == IPSET_TEST)
379 e.ccmp = (HOST_MASK << (sizeof(u8)*8)) | HOST_MASK;
381 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
382 ip6addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1].in6);
383 ip6_netmask(&e.ip[0], e.cidr[0]);
384 ip6_netmask(&e.ip[1], e.cidr[1]);
386 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
390 hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
391 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
393 ipset_adtfn adtfn = set->variant->adt[adt];
394 struct hash_netnet6_elem e = { };
395 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
398 e.cidr[0] = e.cidr[1] = HOST_MASK;
399 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
400 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
401 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
402 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
403 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
404 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
405 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
406 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
407 return -IPSET_ERR_PROTOCOL;
408 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
409 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
411 if (tb[IPSET_ATTR_LINENO])
412 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
414 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]) ||
415 ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]) ||
416 ip_set_get_extensions(set, tb, &ext);
420 if (tb[IPSET_ATTR_CIDR])
421 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
423 if (tb[IPSET_ATTR_CIDR2])
424 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
426 if (!e.cidr[0] || e.cidr[0] > HOST_MASK || !e.cidr[1] ||
427 e.cidr[1] > HOST_MASK)
428 return -IPSET_ERR_INVALID_CIDR;
430 ip6_netmask(&e.ip[0], e.cidr[0]);
431 ip6_netmask(&e.ip[1], e.cidr[1]);
433 if (tb[IPSET_ATTR_CADT_FLAGS]) {
434 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
435 if (cadt_flags & IPSET_FLAG_NOMATCH)
436 flags |= (IPSET_FLAG_NOMATCH << 16);
439 ret = adtfn(set, &e, &ext, &ext, flags);
441 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
442 ip_set_eexist(ret, flags) ? 0 : ret;
445 static struct ip_set_type hash_netnet_type __read_mostly = {
446 .name = "hash:net,net",
447 .protocol = IPSET_PROTOCOL,
448 .features = IPSET_TYPE_IP | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH,
449 .dimension = IPSET_DIM_TWO,
450 .family = NFPROTO_UNSPEC,
451 .revision_min = IPSET_TYPE_REV_MIN,
452 .revision_max = IPSET_TYPE_REV_MAX,
453 .create = hash_netnet_create,
455 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
456 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
457 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
458 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
459 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
460 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
463 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
464 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
465 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
466 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
467 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
468 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
469 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
470 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
471 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
472 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
473 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
474 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
475 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
476 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
482 hash_netnet_init(void)
484 return ip_set_type_register(&hash_netnet_type);
488 hash_netnet_fini(void)
490 ip_set_type_unregister(&hash_netnet_type);
493 module_init(hash_netnet_init);
494 module_exit(hash_netnet_fini);