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:net,port 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>
20 #include <linux/netfilter.h>
21 #include <linux/netfilter/ipset/pfxlen.h>
22 #include <linux/netfilter/ipset/ip_set.h>
23 #include <linux/netfilter/ipset/ip_set_getport.h>
24 #include <linux/netfilter/ipset/ip_set_hash.h>
26 #define IPSET_TYPE_REV_MIN 0
27 /* 1 SCTP and UDPLITE support added */
28 /* 2 Range as input support for IPv4 added */
29 /* 3 nomatch flag support added */
30 /* 4 Counters support added */
31 /* 5 Comments support added */
32 /* 6 Forceadd support added */
33 #define IPSET_TYPE_REV_MAX 7 /* skbinfo support added */
35 MODULE_LICENSE("GPL");
36 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
37 IP_SET_MODULE_DESC("hash:net,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
38 MODULE_ALIAS("ip_set_hash:net,port");
40 /* Type specific function prefix */
41 #define HTYPE hash_netport
42 #define IP_SET_HASH_WITH_PROTO
43 #define IP_SET_HASH_WITH_NETS
45 /* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0
46 * However this way we have to store internally cidr - 1,
47 * dancing back and forth.
49 #define IP_SET_HASH_WITH_NETS_PACKED
54 struct hash_netport4_elem {
62 /* Common functions */
65 hash_netport4_data_equal(const struct hash_netport4_elem *ip1,
66 const struct hash_netport4_elem *ip2,
69 return ip1->ip == ip2->ip &&
70 ip1->port == ip2->port &&
71 ip1->proto == ip2->proto &&
72 ip1->cidr == ip2->cidr;
76 hash_netport4_do_data_match(const struct hash_netport4_elem *elem)
78 return elem->nomatch ? -ENOTEMPTY : 1;
82 hash_netport4_data_set_flags(struct hash_netport4_elem *elem, u32 flags)
84 elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
88 hash_netport4_data_reset_flags(struct hash_netport4_elem *elem, u8 *flags)
90 swap(*flags, elem->nomatch);
94 hash_netport4_data_netmask(struct hash_netport4_elem *elem, u8 cidr)
96 elem->ip &= ip_set_netmask(cidr);
97 elem->cidr = cidr - 1;
101 hash_netport4_data_list(struct sk_buff *skb,
102 const struct hash_netport4_elem *data)
104 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
106 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
107 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
108 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr + 1) ||
109 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
111 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
112 goto nla_put_failure;
120 hash_netport4_data_next(struct hash_netport4_elem *next,
121 const struct hash_netport4_elem *d)
124 next->port = d->port;
127 #define MTYPE hash_netport4
130 #include "ip_set_hash_gen.h"
133 hash_netport4_kadt(struct ip_set *set, const struct sk_buff *skb,
134 const struct xt_action_param *par,
135 enum ipset_adt adt, struct ip_set_adt_opt *opt)
137 const struct hash_netport *h = set->data;
138 ipset_adtfn adtfn = set->variant->adt[adt];
139 struct hash_netport4_elem e = {
140 .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
142 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
144 if (adt == IPSET_TEST)
145 e.cidr = HOST_MASK - 1;
147 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
151 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
152 e.ip &= ip_set_netmask(e.cidr + 1);
154 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
158 hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
159 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
161 const struct hash_netport *h = set->data;
162 ipset_adtfn adtfn = set->variant->adt[adt];
163 struct hash_netport4_elem e = { .cidr = HOST_MASK - 1 };
164 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
165 u32 port, port_to, p = 0, ip = 0, ip_to = 0, last;
166 bool with_ports = false;
170 if (unlikely(!tb[IPSET_ATTR_IP] ||
171 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
172 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
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_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_PORT])
198 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
200 return -IPSET_ERR_PROTOCOL;
202 if (tb[IPSET_ATTR_PROTO]) {
203 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
204 with_ports = ip_set_proto_with_ports(e.proto);
207 return -IPSET_ERR_INVALID_PROTO;
209 return -IPSET_ERR_MISSING_PROTO;
211 if (!(with_ports || e.proto == IPPROTO_ICMP))
214 with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
216 if (tb[IPSET_ATTR_CADT_FLAGS]) {
217 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
218 if (cadt_flags & IPSET_FLAG_NOMATCH)
219 flags |= (IPSET_FLAG_NOMATCH << 16);
222 if (adt == IPSET_TEST || !(with_ports || tb[IPSET_ATTR_IP_TO])) {
223 e.ip = htonl(ip & ip_set_hostmask(e.cidr + 1));
224 ret = adtfn(set, &e, &ext, &ext, flags);
225 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
226 ip_set_eexist(ret, flags) ? 0 : ret;
229 port = port_to = ntohs(e.port);
230 if (tb[IPSET_ATTR_PORT_TO]) {
231 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
235 if (tb[IPSET_ATTR_IP_TO]) {
236 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
241 if (ip + UINT_MAX == ip_to)
242 return -IPSET_ERR_HASH_RANGE;
244 ip_set_mask_from_to(ip, ip_to, e.cidr + 1);
247 ip = ntohl(h->next.ip);
248 while (!after(ip, ip_to)) {
250 last = ip_set_range_to_cidr(ip, ip_to, &cidr);
252 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
254 for (; p <= port_to; p++) {
256 ret = adtfn(set, &e, &ext, &ext, flags);
258 if (ret && !ip_set_eexist(ret, flags))
270 struct hash_netport6_elem {
271 union nf_inet_addr ip;
278 /* Common functions */
281 hash_netport6_data_equal(const struct hash_netport6_elem *ip1,
282 const struct hash_netport6_elem *ip2,
285 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
286 ip1->port == ip2->port &&
287 ip1->proto == ip2->proto &&
288 ip1->cidr == ip2->cidr;
292 hash_netport6_do_data_match(const struct hash_netport6_elem *elem)
294 return elem->nomatch ? -ENOTEMPTY : 1;
298 hash_netport6_data_set_flags(struct hash_netport6_elem *elem, u32 flags)
300 elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
304 hash_netport6_data_reset_flags(struct hash_netport6_elem *elem, u8 *flags)
306 swap(*flags, elem->nomatch);
310 hash_netport6_data_netmask(struct hash_netport6_elem *elem, u8 cidr)
312 ip6_netmask(&elem->ip, cidr);
313 elem->cidr = cidr - 1;
317 hash_netport6_data_list(struct sk_buff *skb,
318 const struct hash_netport6_elem *data)
320 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
322 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
323 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
324 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr + 1) ||
325 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
327 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
328 goto nla_put_failure;
336 hash_netport6_data_next(struct hash_netport4_elem *next,
337 const struct hash_netport6_elem *d)
339 next->port = d->port;
346 #define MTYPE hash_netport6
348 #define HOST_MASK 128
349 #define IP_SET_EMIT_CREATE
350 #include "ip_set_hash_gen.h"
353 hash_netport6_kadt(struct ip_set *set, const struct sk_buff *skb,
354 const struct xt_action_param *par,
355 enum ipset_adt adt, struct ip_set_adt_opt *opt)
357 const struct hash_netport *h = set->data;
358 ipset_adtfn adtfn = set->variant->adt[adt];
359 struct hash_netport6_elem e = {
360 .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
362 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
364 if (adt == IPSET_TEST)
365 e.cidr = HOST_MASK - 1;
367 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
371 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
372 ip6_netmask(&e.ip, e.cidr + 1);
374 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
378 hash_netport6_uadt(struct ip_set *set, struct nlattr *tb[],
379 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
381 const struct hash_netport *h = set->data;
382 ipset_adtfn adtfn = set->variant->adt[adt];
383 struct hash_netport6_elem e = { .cidr = HOST_MASK - 1 };
384 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
386 bool with_ports = false;
390 if (unlikely(!tb[IPSET_ATTR_IP] ||
391 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
392 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
393 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
394 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
395 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
396 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
397 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
398 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
399 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
400 return -IPSET_ERR_PROTOCOL;
401 if (unlikely(tb[IPSET_ATTR_IP_TO]))
402 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
404 if (tb[IPSET_ATTR_LINENO])
405 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
407 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
408 ip_set_get_extensions(set, tb, &ext);
412 if (tb[IPSET_ATTR_CIDR]) {
413 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
414 if (!cidr || cidr > HOST_MASK)
415 return -IPSET_ERR_INVALID_CIDR;
418 ip6_netmask(&e.ip, e.cidr + 1);
420 if (tb[IPSET_ATTR_PORT])
421 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
423 return -IPSET_ERR_PROTOCOL;
425 if (tb[IPSET_ATTR_PROTO]) {
426 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
427 with_ports = ip_set_proto_with_ports(e.proto);
430 return -IPSET_ERR_INVALID_PROTO;
432 return -IPSET_ERR_MISSING_PROTO;
434 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
437 if (tb[IPSET_ATTR_CADT_FLAGS]) {
438 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
439 if (cadt_flags & IPSET_FLAG_NOMATCH)
440 flags |= (IPSET_FLAG_NOMATCH << 16);
443 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
444 ret = adtfn(set, &e, &ext, &ext, flags);
445 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
446 ip_set_eexist(ret, flags) ? 0 : ret;
449 port = ntohs(e.port);
450 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
455 port = ntohs(h->next.port);
456 for (; port <= port_to; port++) {
457 e.port = htons(port);
458 ret = adtfn(set, &e, &ext, &ext, flags);
460 if (ret && !ip_set_eexist(ret, flags))
468 static struct ip_set_type hash_netport_type __read_mostly = {
469 .name = "hash:net,port",
470 .protocol = IPSET_PROTOCOL,
471 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_NOMATCH,
472 .dimension = IPSET_DIM_TWO,
473 .family = NFPROTO_UNSPEC,
474 .revision_min = IPSET_TYPE_REV_MIN,
475 .revision_max = IPSET_TYPE_REV_MAX,
476 .create = hash_netport_create,
478 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
479 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
480 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
481 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
482 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
483 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
484 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
487 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
488 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
489 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
490 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
491 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
492 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
493 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
494 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
495 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
496 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
497 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
498 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
499 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
500 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
501 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
507 hash_netport_init(void)
509 return ip_set_type_register(&hash_netport_type);
513 hash_netport_fini(void)
515 ip_set_type_unregister(&hash_netport_type);
518 module_init(hash_netport_init);
519 module_exit(hash_netport_fini);