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
143 #include "ip_set_hash_gen.h"
146 hash_netportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
147 const struct xt_action_param *par,
148 enum ipset_adt adt, struct ip_set_adt_opt *opt)
150 const struct hash_netportnet *h = set->data;
151 ipset_adtfn adtfn = set->variant->adt[adt];
152 struct hash_netportnet4_elem e = { };
153 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
155 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
156 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
157 if (adt == IPSET_TEST)
158 e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
160 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
164 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
165 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1]);
166 e.ip[0] &= ip_set_netmask(e.cidr[0]);
167 e.ip[1] &= ip_set_netmask(e.cidr[1]);
169 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
173 hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
174 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
176 const struct hash_netportnet *h = set->data;
177 ipset_adtfn adtfn = set->variant->adt[adt];
178 struct hash_netportnet4_elem e = { .cidr = { HOST_MASK, HOST_MASK, }, };
179 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
180 u32 ip = 0, ip_to = 0, ip_last, p = 0, port, port_to;
181 u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2;
182 bool with_ports = false;
185 if (tb[IPSET_ATTR_LINENO])
186 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
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_CADT_FLAGS)))
192 return -IPSET_ERR_PROTOCOL;
194 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
198 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
202 ret = ip_set_get_extensions(set, tb, &ext);
206 if (tb[IPSET_ATTR_CIDR]) {
207 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
208 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
209 return -IPSET_ERR_INVALID_CIDR;
212 if (tb[IPSET_ATTR_CIDR2]) {
213 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
214 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
215 return -IPSET_ERR_INVALID_CIDR;
218 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
220 if (tb[IPSET_ATTR_PROTO]) {
221 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
222 with_ports = ip_set_proto_with_ports(e.proto);
225 return -IPSET_ERR_INVALID_PROTO;
227 return -IPSET_ERR_MISSING_PROTO;
230 if (!(with_ports || e.proto == IPPROTO_ICMP))
233 if (tb[IPSET_ATTR_CADT_FLAGS]) {
234 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
236 if (cadt_flags & IPSET_FLAG_NOMATCH)
237 flags |= (IPSET_FLAG_NOMATCH << 16);
240 with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
241 if (adt == IPSET_TEST ||
242 !(tb[IPSET_ATTR_IP_TO] || with_ports || tb[IPSET_ATTR_IP2_TO])) {
243 e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
244 e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
245 ret = adtfn(set, &e, &ext, &ext, flags);
246 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
247 ip_set_eexist(ret, flags) ? 0 : ret;
251 if (tb[IPSET_ATTR_IP_TO]) {
252 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
257 if (unlikely(ip + UINT_MAX == ip_to))
258 return -IPSET_ERR_HASH_RANGE;
260 ip_set_mask_from_to(ip, ip_to, e.cidr[0]);
263 port_to = port = ntohs(e.port);
264 if (tb[IPSET_ATTR_PORT_TO]) {
265 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
271 if (tb[IPSET_ATTR_IP2_TO]) {
272 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
275 if (ip2_from > ip2_to)
276 swap(ip2_from, ip2_to);
277 if (unlikely(ip2_from + UINT_MAX == ip2_to))
278 return -IPSET_ERR_HASH_RANGE;
280 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
284 ip = ntohl(h->next.ip[0]);
286 while (!after(ip, ip_to)) {
288 ip_last = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
289 p = retried && ip == ntohl(h->next.ip[0]) ? ntohs(h->next.port)
291 for (; p <= port_to; p++) {
293 ip2 = (retried && ip == ntohl(h->next.ip[0]) &&
294 p == ntohs(h->next.port)) ? ntohl(h->next.ip[1])
296 while (!after(ip2, ip2_to)) {
297 e.ip[1] = htonl(ip2);
298 ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
300 ret = adtfn(set, &e, &ext, &ext, flags);
301 if (ret && !ip_set_eexist(ret, flags))
315 struct hash_netportnet6_elem {
316 union nf_inet_addr ip[2];
327 /* Common functions */
330 hash_netportnet6_data_equal(const struct hash_netportnet6_elem *ip1,
331 const struct hash_netportnet6_elem *ip2,
334 return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
335 ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
336 ip1->ccmp == ip2->ccmp &&
337 ip1->port == ip2->port &&
338 ip1->proto == ip2->proto;
342 hash_netportnet6_do_data_match(const struct hash_netportnet6_elem *elem)
344 return elem->nomatch ? -ENOTEMPTY : 1;
348 hash_netportnet6_data_set_flags(struct hash_netportnet6_elem *elem, u32 flags)
350 elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
354 hash_netportnet6_data_reset_flags(struct hash_netportnet6_elem *elem, u8 *flags)
356 swap(*flags, elem->nomatch);
360 hash_netportnet6_data_reset_elem(struct hash_netportnet6_elem *elem,
361 struct hash_netportnet6_elem *orig)
363 elem->ip[1] = orig->ip[1];
367 hash_netportnet6_data_netmask(struct hash_netportnet6_elem *elem,
371 ip6_netmask(&elem->ip[1], cidr);
372 elem->cidr[1] = cidr;
374 ip6_netmask(&elem->ip[0], cidr);
375 elem->cidr[0] = cidr;
380 hash_netportnet6_data_list(struct sk_buff *skb,
381 const struct hash_netportnet6_elem *data)
383 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
385 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
386 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
387 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
388 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
389 nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
390 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
392 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
393 goto nla_put_failure;
401 hash_netportnet6_data_next(struct hash_netportnet4_elem *next,
402 const struct hash_netportnet6_elem *d)
404 next->port = d->port;
410 #define MTYPE hash_netportnet6
411 #define HOST_MASK 128
412 #define IP_SET_EMIT_CREATE
413 #include "ip_set_hash_gen.h"
416 hash_netportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
417 const struct xt_action_param *par,
418 enum ipset_adt adt, struct ip_set_adt_opt *opt)
420 const struct hash_netportnet *h = set->data;
421 ipset_adtfn adtfn = set->variant->adt[adt];
422 struct hash_netportnet6_elem e = { };
423 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
425 e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK);
426 e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK);
427 if (adt == IPSET_TEST)
428 e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
430 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
434 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
435 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1].in6);
436 ip6_netmask(&e.ip[0], e.cidr[0]);
437 ip6_netmask(&e.ip[1], e.cidr[1]);
439 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
443 hash_netportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
444 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
446 const struct hash_netportnet *h = set->data;
447 ipset_adtfn adtfn = set->variant->adt[adt];
448 struct hash_netportnet6_elem e = { .cidr = { HOST_MASK, HOST_MASK, }, };
449 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
451 bool with_ports = false;
454 if (tb[IPSET_ATTR_LINENO])
455 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
457 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
458 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
459 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
460 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
461 return -IPSET_ERR_PROTOCOL;
462 if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
463 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
465 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]);
469 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]);
473 ret = ip_set_get_extensions(set, tb, &ext);
477 if (tb[IPSET_ATTR_CIDR]) {
478 e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
479 if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
480 return -IPSET_ERR_INVALID_CIDR;
483 if (tb[IPSET_ATTR_CIDR2]) {
484 e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
485 if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
486 return -IPSET_ERR_INVALID_CIDR;
489 ip6_netmask(&e.ip[0], e.cidr[0]);
490 ip6_netmask(&e.ip[1], e.cidr[1]);
492 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
494 if (tb[IPSET_ATTR_PROTO]) {
495 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
496 with_ports = ip_set_proto_with_ports(e.proto);
499 return -IPSET_ERR_INVALID_PROTO;
501 return -IPSET_ERR_MISSING_PROTO;
504 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
507 if (tb[IPSET_ATTR_CADT_FLAGS]) {
508 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
510 if (cadt_flags & IPSET_FLAG_NOMATCH)
511 flags |= (IPSET_FLAG_NOMATCH << 16);
514 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
515 ret = adtfn(set, &e, &ext, &ext, flags);
516 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
517 ip_set_eexist(ret, flags) ? 0 : ret;
520 port = ntohs(e.port);
521 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
526 port = ntohs(h->next.port);
527 for (; port <= port_to; port++) {
528 e.port = htons(port);
529 ret = adtfn(set, &e, &ext, &ext, flags);
531 if (ret && !ip_set_eexist(ret, flags))
539 static struct ip_set_type hash_netportnet_type __read_mostly = {
540 .name = "hash:net,port,net",
541 .protocol = IPSET_PROTOCOL,
542 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2 |
544 .dimension = IPSET_DIM_THREE,
545 .family = NFPROTO_UNSPEC,
546 .revision_min = IPSET_TYPE_REV_MIN,
547 .revision_max = IPSET_TYPE_REV_MAX,
548 .create = hash_netportnet_create,
550 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
551 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
552 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
553 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
554 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
555 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
558 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
559 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
560 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
561 [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
562 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
563 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
564 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
565 [IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
566 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
567 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
568 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
569 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
570 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
571 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
572 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
573 .len = IPSET_MAX_COMMENT_SIZE },
574 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
575 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
576 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
582 hash_netportnet_init(void)
584 return ip_set_type_register(&hash_netportnet_type);
588 hash_netportnet_fini(void)
591 ip_set_type_unregister(&hash_netportnet_type);
594 module_init(hash_netportnet_init);
595 module_exit(hash_netportnet_fini);