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 #define IPSET_TYPE_REV_MAX 6 /* Forceadd support added */
34 MODULE_LICENSE("GPL");
35 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
36 IP_SET_MODULE_DESC("hash:net,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
37 MODULE_ALIAS("ip_set_hash:net,port");
39 /* Type specific function prefix */
40 #define HTYPE hash_netport
41 #define IP_SET_HASH_WITH_PROTO
42 #define IP_SET_HASH_WITH_NETS
44 /* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0
45 * However this way we have to store internally cidr - 1,
46 * dancing back and forth.
48 #define IP_SET_HASH_WITH_NETS_PACKED
53 struct hash_netport4_elem {
61 /* Common functions */
64 hash_netport4_data_equal(const struct hash_netport4_elem *ip1,
65 const struct hash_netport4_elem *ip2,
68 return ip1->ip == ip2->ip &&
69 ip1->port == ip2->port &&
70 ip1->proto == ip2->proto &&
71 ip1->cidr == ip2->cidr;
75 hash_netport4_do_data_match(const struct hash_netport4_elem *elem)
77 return elem->nomatch ? -ENOTEMPTY : 1;
81 hash_netport4_data_set_flags(struct hash_netport4_elem *elem, u32 flags)
83 elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
87 hash_netport4_data_reset_flags(struct hash_netport4_elem *elem, u8 *flags)
89 swap(*flags, elem->nomatch);
93 hash_netport4_data_netmask(struct hash_netport4_elem *elem, u8 cidr)
95 elem->ip &= ip_set_netmask(cidr);
96 elem->cidr = cidr - 1;
100 hash_netport4_data_list(struct sk_buff *skb,
101 const struct hash_netport4_elem *data)
103 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
105 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
106 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
107 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr + 1) ||
108 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
110 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
111 goto nla_put_failure;
119 hash_netport4_data_next(struct hash_netport4_elem *next,
120 const struct hash_netport4_elem *d)
123 next->port = d->port;
126 #define MTYPE hash_netport4
129 #include "ip_set_hash_gen.h"
132 hash_netport4_kadt(struct ip_set *set, const struct sk_buff *skb,
133 const struct xt_action_param *par,
134 enum ipset_adt adt, struct ip_set_adt_opt *opt)
136 const struct hash_netport *h = set->data;
137 ipset_adtfn adtfn = set->variant->adt[adt];
138 struct hash_netport4_elem e = {
139 .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
141 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
143 if (adt == IPSET_TEST)
144 e.cidr = HOST_MASK - 1;
146 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
150 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
151 e.ip &= ip_set_netmask(e.cidr + 1);
153 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
157 hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
158 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
160 const struct hash_netport *h = set->data;
161 ipset_adtfn adtfn = set->variant->adt[adt];
162 struct hash_netport4_elem e = { .cidr = HOST_MASK - 1 };
163 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
164 u32 port, port_to, p = 0, ip = 0, ip_to = 0, last;
165 bool with_ports = false;
169 if (unlikely(!tb[IPSET_ATTR_IP] ||
170 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
171 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
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 return -IPSET_ERR_PROTOCOL;
178 if (tb[IPSET_ATTR_LINENO])
179 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
181 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip) ||
182 ip_set_get_extensions(set, tb, &ext);
186 if (tb[IPSET_ATTR_CIDR]) {
187 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
188 if (!cidr || cidr > HOST_MASK)
189 return -IPSET_ERR_INVALID_CIDR;
193 if (tb[IPSET_ATTR_PORT])
194 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
196 return -IPSET_ERR_PROTOCOL;
198 if (tb[IPSET_ATTR_PROTO]) {
199 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
200 with_ports = ip_set_proto_with_ports(e.proto);
203 return -IPSET_ERR_INVALID_PROTO;
205 return -IPSET_ERR_MISSING_PROTO;
207 if (!(with_ports || e.proto == IPPROTO_ICMP))
210 with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
212 if (tb[IPSET_ATTR_CADT_FLAGS]) {
213 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
214 if (cadt_flags & IPSET_FLAG_NOMATCH)
215 flags |= (IPSET_FLAG_NOMATCH << 16);
218 if (adt == IPSET_TEST || !(with_ports || tb[IPSET_ATTR_IP_TO])) {
219 e.ip = htonl(ip & ip_set_hostmask(e.cidr + 1));
220 ret = adtfn(set, &e, &ext, &ext, flags);
221 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
222 ip_set_eexist(ret, flags) ? 0 : ret;
225 port = port_to = ntohs(e.port);
226 if (tb[IPSET_ATTR_PORT_TO]) {
227 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
231 if (tb[IPSET_ATTR_IP_TO]) {
232 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
237 if (ip + UINT_MAX == ip_to)
238 return -IPSET_ERR_HASH_RANGE;
240 ip_set_mask_from_to(ip, ip_to, e.cidr + 1);
243 ip = ntohl(h->next.ip);
244 while (!after(ip, ip_to)) {
246 last = ip_set_range_to_cidr(ip, ip_to, &cidr);
248 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
250 for (; p <= port_to; p++) {
252 ret = adtfn(set, &e, &ext, &ext, flags);
254 if (ret && !ip_set_eexist(ret, flags))
266 struct hash_netport6_elem {
267 union nf_inet_addr ip;
274 /* Common functions */
277 hash_netport6_data_equal(const struct hash_netport6_elem *ip1,
278 const struct hash_netport6_elem *ip2,
281 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
282 ip1->port == ip2->port &&
283 ip1->proto == ip2->proto &&
284 ip1->cidr == ip2->cidr;
288 hash_netport6_do_data_match(const struct hash_netport6_elem *elem)
290 return elem->nomatch ? -ENOTEMPTY : 1;
294 hash_netport6_data_set_flags(struct hash_netport6_elem *elem, u32 flags)
296 elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
300 hash_netport6_data_reset_flags(struct hash_netport6_elem *elem, u8 *flags)
302 swap(*flags, elem->nomatch);
306 hash_netport6_data_netmask(struct hash_netport6_elem *elem, u8 cidr)
308 ip6_netmask(&elem->ip, cidr);
309 elem->cidr = cidr - 1;
313 hash_netport6_data_list(struct sk_buff *skb,
314 const struct hash_netport6_elem *data)
316 u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
318 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
319 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
320 nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr + 1) ||
321 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
323 nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
324 goto nla_put_failure;
332 hash_netport6_data_next(struct hash_netport4_elem *next,
333 const struct hash_netport6_elem *d)
335 next->port = d->port;
342 #define MTYPE hash_netport6
344 #define HOST_MASK 128
345 #define IP_SET_EMIT_CREATE
346 #include "ip_set_hash_gen.h"
349 hash_netport6_kadt(struct ip_set *set, const struct sk_buff *skb,
350 const struct xt_action_param *par,
351 enum ipset_adt adt, struct ip_set_adt_opt *opt)
353 const struct hash_netport *h = set->data;
354 ipset_adtfn adtfn = set->variant->adt[adt];
355 struct hash_netport6_elem e = {
356 .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
358 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
360 if (adt == IPSET_TEST)
361 e.cidr = HOST_MASK - 1;
363 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
367 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
368 ip6_netmask(&e.ip, e.cidr + 1);
370 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
374 hash_netport6_uadt(struct ip_set *set, struct nlattr *tb[],
375 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
377 const struct hash_netport *h = set->data;
378 ipset_adtfn adtfn = set->variant->adt[adt];
379 struct hash_netport6_elem e = { .cidr = HOST_MASK - 1 };
380 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
382 bool with_ports = false;
386 if (unlikely(!tb[IPSET_ATTR_IP] ||
387 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
388 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
389 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
390 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
391 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
392 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
393 return -IPSET_ERR_PROTOCOL;
394 if (unlikely(tb[IPSET_ATTR_IP_TO]))
395 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
397 if (tb[IPSET_ATTR_LINENO])
398 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
400 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
401 ip_set_get_extensions(set, tb, &ext);
405 if (tb[IPSET_ATTR_CIDR]) {
406 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
407 if (!cidr || cidr > HOST_MASK)
408 return -IPSET_ERR_INVALID_CIDR;
411 ip6_netmask(&e.ip, e.cidr + 1);
413 if (tb[IPSET_ATTR_PORT])
414 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
416 return -IPSET_ERR_PROTOCOL;
418 if (tb[IPSET_ATTR_PROTO]) {
419 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
420 with_ports = ip_set_proto_with_ports(e.proto);
423 return -IPSET_ERR_INVALID_PROTO;
425 return -IPSET_ERR_MISSING_PROTO;
427 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
430 if (tb[IPSET_ATTR_CADT_FLAGS]) {
431 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
432 if (cadt_flags & IPSET_FLAG_NOMATCH)
433 flags |= (IPSET_FLAG_NOMATCH << 16);
436 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
437 ret = adtfn(set, &e, &ext, &ext, flags);
438 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
439 ip_set_eexist(ret, flags) ? 0 : ret;
442 port = ntohs(e.port);
443 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
448 port = ntohs(h->next.port);
449 for (; port <= port_to; port++) {
450 e.port = htons(port);
451 ret = adtfn(set, &e, &ext, &ext, flags);
453 if (ret && !ip_set_eexist(ret, flags))
461 static struct ip_set_type hash_netport_type __read_mostly = {
462 .name = "hash:net,port",
463 .protocol = IPSET_PROTOCOL,
464 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_NOMATCH,
465 .dimension = IPSET_DIM_TWO,
466 .family = NFPROTO_UNSPEC,
467 .revision_min = IPSET_TYPE_REV_MIN,
468 .revision_max = IPSET_TYPE_REV_MAX,
469 .create = hash_netport_create,
471 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
472 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
473 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
474 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
475 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
476 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
477 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
480 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
481 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
482 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
483 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
484 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
485 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
486 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
487 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
488 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
489 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
490 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
491 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
497 hash_netport_init(void)
499 return ip_set_type_register(&hash_netport_type);
503 hash_netport_fini(void)
505 ip_set_type_unregister(&hash_netport_type);
508 module_init(hash_netport_init);
509 module_exit(hash_netport_fini);