1 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 as
5 * published by the Free Software Foundation.
8 /* Kernel module implementing an IP set type: the hash:ip,port,net type */
10 #include <linux/jhash.h>
11 #include <linux/module.h>
13 #include <linux/skbuff.h>
14 #include <linux/errno.h>
15 #include <linux/random.h>
18 #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_getport.h>
25 #include <linux/netfilter/ipset/ip_set_hash.h>
27 #define IPSET_TYPE_REV_MIN 0
28 /* 0 Comments support added */
29 /* 1 Forceadd support added */
30 #define IPSET_TYPE_REV_MAX 2 /* skbinfo support added */
32 MODULE_LICENSE("GPL");
33 MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
34 IP_SET_MODULE_DESC("hash:net,port,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
35 MODULE_ALIAS("ip_set_hash:net,port,net");
37 /* Type specific function prefix */
38 #define HTYPE hash_netportnet
39 #define IP_SET_HASH_WITH_PROTO
40 #define IP_SET_HASH_WITH_NETS
41 #define IPSET_NET_COUNT 2
46 struct hash_netportnet4_elem {
61 /* Common functions */
64 hash_netportnet4_data_equal(const struct hash_netportnet4_elem *ip1,
65 const struct hash_netportnet4_elem *ip2,
68 return ip1->ipcmp == ip2->ipcmp &&
69 ip1->ccmp == ip2->ccmp &&
70 ip1->port == ip2->port &&
71 ip1->proto == ip2->proto;
75 hash_netportnet4_do_data_match(const struct hash_netportnet4_elem *elem)
77 return elem->nomatch ? -ENOTEMPTY : 1;
81 hash_netportnet4_data_set_flags(struct hash_netportnet4_elem *elem, u32 flags)
83 elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
87 hash_netportnet4_data_reset_flags(struct hash_netportnet4_elem *elem, u8 *flags)
89 swap(*flags, elem->nomatch);
93 hash_netportnet4_data_reset_elem(struct hash_netportnet4_elem *elem,
94 struct hash_netportnet4_elem *orig)
96 elem->ip[1] = orig->ip[1];
100 hash_netportnet4_data_netmask(struct hash_netportnet4_elem *elem,
104 elem->ip[1] &= ip_set_netmask(cidr);
105 elem->cidr[1] = cidr;
107 elem->ip[0] &= ip_set_netmask(cidr);
108 elem->cidr[0] = cidr;
113 hash_netportnet4_data_list(struct sk_buff *skb,
114 const struct hash_netportnet4_elem *data)
116 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
118 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
119 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
120 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
121 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
122 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
123 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
125 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
126 goto nla_put_failure;
134 hash_netportnet4_data_next(struct hash_netportnet4_elem *next,
135 const struct hash_netportnet4_elem *d)
137 next->ipcmp = d->ipcmp;
138 next->port = d->port;
141 #define MTYPE hash_netportnet4
144 #include "ip_set_hash_gen.h"
147 hash_netportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
148 const struct xt_action_param *par,
149 enum ipset_adt adt, struct ip_set_adt_opt *opt)
151 const struct hash_netportnet *h = set->data;
152 ipset_adtfn adtfn = set->variant->adt[adt];
153 struct hash_netportnet4_elem e = { };
154 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
156 e.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
157 e.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
158 if (adt == IPSET_TEST)
159 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
161 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
165 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
166 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1]);
167 e.ip[0] &= ip_set_netmask(e.cidr[0]);
168 e.ip[1] &= ip_set_netmask(e.cidr[1]);
170 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
174 hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
175 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
177 const struct hash_netportnet *h = set->data;
178 ipset_adtfn adtfn = set->variant->adt[adt];
179 struct hash_netportnet4_elem e = { };
180 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
181 u32 ip = 0, ip_to = 0, ip_last, p = 0, port, port_to;
182 u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2;
183 bool with_ports = false;
187 e.cidr[0] = e.cidr[1] = HOST_MASK;
188 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
189 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
190 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
191 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
192 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
193 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
194 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
195 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
196 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
197 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
198 return -IPSET_ERR_PROTOCOL;
200 if (tb[IPSET_ATTR_LINENO])
201 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
203 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip) ||
204 ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from) ||
205 ip_set_get_extensions(set, tb, &ext);
209 if (tb[IPSET_ATTR_CIDR]) {
210 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
211 if (!cidr || cidr > HOST_MASK)
212 return -IPSET_ERR_INVALID_CIDR;
216 if (tb[IPSET_ATTR_CIDR2]) {
217 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
218 if (!cidr || cidr > HOST_MASK)
219 return -IPSET_ERR_INVALID_CIDR;
223 if (tb[IPSET_ATTR_PORT])
224 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
226 return -IPSET_ERR_PROTOCOL;
228 if (tb[IPSET_ATTR_PROTO]) {
229 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
230 with_ports = ip_set_proto_with_ports(e.proto);
233 return -IPSET_ERR_INVALID_PROTO;
235 return -IPSET_ERR_MISSING_PROTO;
237 if (!(with_ports || e.proto == IPPROTO_ICMP))
240 if (tb[IPSET_ATTR_CADT_FLAGS]) {
241 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
242 if (cadt_flags & IPSET_FLAG_NOMATCH)
243 flags |= (IPSET_FLAG_NOMATCH << 16);
246 with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
247 if (adt == IPSET_TEST ||
248 !(tb[IPSET_ATTR_IP_TO] || with_ports || tb[IPSET_ATTR_IP2_TO])) {
249 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
250 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
251 ret = adtfn(set, &e, &ext, &ext, flags);
252 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
253 ip_set_eexist(ret, flags) ? 0 : ret;
257 if (tb[IPSET_ATTR_IP_TO]) {
258 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
263 if (unlikely(ip + UINT_MAX == ip_to))
264 return -IPSET_ERR_HASH_RANGE;
266 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
268 port_to = port = ntohs(e.port);
269 if (tb[IPSET_ATTR_PORT_TO]) {
270 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
276 if (tb[IPSET_ATTR_IP2_TO]) {
277 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
280 if (ip2_from > ip2_to)
281 swap(ip2_from, ip2_to);
282 if (unlikely(ip2_from + UINT_MAX == ip2_to))
283 return -IPSET_ERR_HASH_RANGE;
285 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
288 ip = ntohl(h->next.ip[0]);
290 while (!after(ip, ip_to)) {
292 ip_last = ip_set_range_to_cidr(ip, ip_to, &cidr);
294 p = retried && ip == ntohl(h->next.ip[0]) ? ntohs(h->next.port)
296 for (; p <= port_to; p++) {
298 ip2 = (retried && ip == ntohl(h->next.ip[0]) &&
299 p == ntohs(h->next.port)) ? ntohl(h->next.ip[1])
301 while (!after(ip2, ip2_to)) {
302 e.ip[1] = htonl(ip2);
303 ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
306 ret = adtfn(set, &e, &ext, &ext, flags);
307 if (ret && !ip_set_eexist(ret, flags))
321 struct hash_netportnet6_elem {
322 union nf_inet_addr ip[2];
333 /* Common functions */
336 hash_netportnet6_data_equal(const struct hash_netportnet6_elem *ip1,
337 const struct hash_netportnet6_elem *ip2,
340 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
341 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
342 ip1->ccmp == ip2->ccmp &&
343 ip1->port == ip2->port &&
344 ip1->proto == ip2->proto;
348 hash_netportnet6_do_data_match(const struct hash_netportnet6_elem *elem)
350 return elem->nomatch ? -ENOTEMPTY : 1;
354 hash_netportnet6_data_set_flags(struct hash_netportnet6_elem *elem, u32 flags)
356 elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
360 hash_netportnet6_data_reset_flags(struct hash_netportnet6_elem *elem, u8 *flags)
362 swap(*flags, elem->nomatch);
366 hash_netportnet6_data_reset_elem(struct hash_netportnet6_elem *elem,
367 struct hash_netportnet6_elem *orig)
369 elem->ip[1] = orig->ip[1];
373 hash_netportnet6_data_netmask(struct hash_netportnet6_elem *elem,
377 ip6_netmask(&elem->ip[1], cidr);
378 elem->cidr[1] = cidr;
380 ip6_netmask(&elem->ip[0], cidr);
381 elem->cidr[0] = cidr;
386 hash_netportnet6_data_list(struct sk_buff *skb,
387 const struct hash_netportnet6_elem *data)
389 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
391 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
392 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
393 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
394 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
395 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
396 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
398 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
399 goto nla_put_failure;
407 hash_netportnet6_data_next(struct hash_netportnet4_elem *next,
408 const struct hash_netportnet6_elem *d)
410 next->port = d->port;
417 #define MTYPE hash_netportnet6
419 #define HOST_MASK 128
420 #define IP_SET_EMIT_CREATE
421 #include "ip_set_hash_gen.h"
424 hash_netportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
425 const struct xt_action_param *par,
426 enum ipset_adt adt, struct ip_set_adt_opt *opt)
428 const struct hash_netportnet *h = set->data;
429 ipset_adtfn adtfn = set->variant->adt[adt];
430 struct hash_netportnet6_elem e = { };
431 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
433 e.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
434 e.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
435 if (adt == IPSET_TEST)
436 e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
438 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
442 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
443 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1].in6);
444 ip6_netmask(&e.ip[0], e.cidr[0]);
445 ip6_netmask(&e.ip[1], e.cidr[1]);
447 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
451 hash_netportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
452 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
454 const struct hash_netportnet *h = set->data;
455 ipset_adtfn adtfn = set->variant->adt[adt];
456 struct hash_netportnet6_elem e = { };
457 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
459 bool with_ports = false;
462 e.cidr[0] = e.cidr[1] = HOST_MASK;
463 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
464 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
465 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
466 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
467 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
468 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
469 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
470 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
471 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
472 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
473 return -IPSET_ERR_PROTOCOL;
474 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
475 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
477 if (tb[IPSET_ATTR_LINENO])
478 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
480 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]) ||
481 ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]) ||
482 ip_set_get_extensions(set, tb, &ext);
486 if (tb[IPSET_ATTR_CIDR])
487 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
489 if (tb[IPSET_ATTR_CIDR2])
490 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
492 if (unlikely(!e.cidr[0] || e.cidr[0] > HOST_MASK || !e.cidr[1] ||
493 e.cidr[1] > HOST_MASK))
494 return -IPSET_ERR_INVALID_CIDR;
496 ip6_netmask(&e.ip[0], e.cidr[0]);
497 ip6_netmask(&e.ip[1], e.cidr[1]);
499 if (tb[IPSET_ATTR_PORT])
500 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
502 return -IPSET_ERR_PROTOCOL;
504 if (tb[IPSET_ATTR_PROTO]) {
505 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
506 with_ports = ip_set_proto_with_ports(e.proto);
509 return -IPSET_ERR_INVALID_PROTO;
511 return -IPSET_ERR_MISSING_PROTO;
513 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
516 if (tb[IPSET_ATTR_CADT_FLAGS]) {
517 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
518 if (cadt_flags & IPSET_FLAG_NOMATCH)
519 flags |= (IPSET_FLAG_NOMATCH << 16);
522 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
523 ret = adtfn(set, &e, &ext, &ext, flags);
524 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
525 ip_set_eexist(ret, flags) ? 0 : ret;
528 port = ntohs(e.port);
529 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
534 port = ntohs(h->next.port);
535 for (; port <= port_to; port++) {
536 e.port = htons(port);
537 ret = adtfn(set, &e, &ext, &ext, flags);
539 if (ret && !ip_set_eexist(ret, flags))
547 static struct ip_set_type hash_netportnet_type __read_mostly = {
548 .name = "hash:net,port,net",
549 .protocol = IPSET_PROTOCOL,
550 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2 |
552 .dimension = IPSET_DIM_THREE,
553 .family = NFPROTO_UNSPEC,
554 .revision_min = IPSET_TYPE_REV_MIN,
555 .revision_max = IPSET_TYPE_REV_MAX,
556 .create = hash_netportnet_create,
558 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
559 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
560 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
561 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
562 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
563 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
566 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
567 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
568 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
569 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
570 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
571 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
572 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
573 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
574 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
575 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
576 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
577 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
578 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
579 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
580 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
581 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
582 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
583 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
589 hash_netportnet_init(void)
591 return ip_set_type_register(&hash_netportnet_type);
595 hash_netportnet_fini(void)
597 ip_set_type_unregister(&hash_netportnet_type);
600 module_init(hash_netportnet_init);
601 module_exit(hash_netportnet_fini);