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,ip 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 /* 1 SCTP and UDPLITE support added */
29 #define IPSET_TYPE_REV_MAX 2 /* Counters support added */
31 MODULE_LICENSE("GPL");
32 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
33 IP_SET_MODULE_DESC("hash:ip,port,ip", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
34 MODULE_ALIAS("ip_set_hash:ip,port,ip");
36 /* Type specific function prefix */
37 #define HTYPE hash_ipportip
42 struct hash_ipportip4_elem {
50 struct hash_ipportip4t_elem {
56 unsigned long timeout;
59 struct hash_ipportip4c_elem {
65 struct ip_set_counter counter;
68 struct hash_ipportip4ct_elem {
74 struct ip_set_counter counter;
75 unsigned long timeout;
79 hash_ipportip4_data_equal(const struct hash_ipportip4_elem *ip1,
80 const struct hash_ipportip4_elem *ip2,
83 return ip1->ip == ip2->ip &&
84 ip1->ip2 == ip2->ip2 &&
85 ip1->port == ip2->port &&
86 ip1->proto == ip2->proto;
90 hash_ipportip4_data_list(struct sk_buff *skb,
91 const struct hash_ipportip4_elem *data)
93 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
94 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip2) ||
95 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
96 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
105 hash_ipportip4_data_next(struct hash_ipportip4_elem *next,
106 const struct hash_ipportip4_elem *d)
109 next->port = d->port;
112 /* Common functions */
113 #define MTYPE hash_ipportip4
116 #include "ip_set_hash_gen.h"
119 hash_ipportip4_kadt(struct ip_set *set, const struct sk_buff *skb,
120 const struct xt_action_param *par,
121 enum ipset_adt adt, struct ip_set_adt_opt *opt)
123 ipset_adtfn adtfn = set->variant->adt[adt];
124 struct hash_ipportip4_elem e = { };
125 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
127 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
131 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
132 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2);
133 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
137 hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
138 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
140 const struct hash_ipportip *h = set->data;
141 ipset_adtfn adtfn = set->variant->adt[adt];
142 struct hash_ipportip4_elem e = { };
143 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
144 u32 ip, ip_to = 0, p = 0, port, port_to;
145 bool with_ports = false;
148 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
149 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
150 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
151 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
152 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
153 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
154 return -IPSET_ERR_PROTOCOL;
156 if (tb[IPSET_ATTR_LINENO])
157 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
159 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
160 ip_set_get_extensions(set, tb, &ext);
164 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &e.ip2);
168 if (tb[IPSET_ATTR_PORT])
169 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
171 return -IPSET_ERR_PROTOCOL;
173 if (tb[IPSET_ATTR_PROTO]) {
174 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
175 with_ports = ip_set_proto_with_ports(e.proto);
178 return -IPSET_ERR_INVALID_PROTO;
180 return -IPSET_ERR_MISSING_PROTO;
182 if (!(with_ports || e.proto == IPPROTO_ICMP))
185 if (adt == IPSET_TEST ||
186 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
187 tb[IPSET_ATTR_PORT_TO])) {
188 ret = adtfn(set, &e, &ext, &ext, flags);
189 return ip_set_eexist(ret, flags) ? 0 : ret;
192 ip_to = ip = ntohl(e.ip);
193 if (tb[IPSET_ATTR_IP_TO]) {
194 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
199 } else if (tb[IPSET_ATTR_CIDR]) {
200 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
202 if (!cidr || cidr > 32)
203 return -IPSET_ERR_INVALID_CIDR;
204 ip_set_mask_from_to(ip, ip_to, cidr);
207 port_to = port = ntohs(e.port);
208 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
209 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
215 ip = ntohl(h->next.ip);
216 for (; !before(ip_to, ip); ip++) {
217 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
219 for (; p <= port_to; p++) {
222 ret = adtfn(set, &e, &ext, &ext, flags);
224 if (ret && !ip_set_eexist(ret, flags))
235 struct hash_ipportip6_elem {
236 union nf_inet_addr ip;
237 union nf_inet_addr ip2;
243 struct hash_ipportip6t_elem {
244 union nf_inet_addr ip;
245 union nf_inet_addr ip2;
249 unsigned long timeout;
252 struct hash_ipportip6c_elem {
253 union nf_inet_addr ip;
254 union nf_inet_addr ip2;
258 struct ip_set_counter counter;
261 struct hash_ipportip6ct_elem {
262 union nf_inet_addr ip;
263 union nf_inet_addr ip2;
267 struct ip_set_counter counter;
268 unsigned long timeout;
271 /* Common functions */
274 hash_ipportip6_data_equal(const struct hash_ipportip6_elem *ip1,
275 const struct hash_ipportip6_elem *ip2,
278 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
279 ipv6_addr_equal(&ip1->ip2.in6, &ip2->ip2.in6) &&
280 ip1->port == ip2->port &&
281 ip1->proto == ip2->proto;
285 hash_ipportip6_data_list(struct sk_buff *skb,
286 const struct hash_ipportip6_elem *data)
288 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
289 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) ||
290 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
291 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
292 goto nla_put_failure;
300 hash_ipportip6_data_next(struct hash_ipportip4_elem *next,
301 const struct hash_ipportip6_elem *d)
303 next->port = d->port;
310 #define MTYPE hash_ipportip6
312 #define HOST_MASK 128
313 #define IP_SET_EMIT_CREATE
314 #include "ip_set_hash_gen.h"
317 hash_ipportip6_kadt(struct ip_set *set, const struct sk_buff *skb,
318 const struct xt_action_param *par,
319 enum ipset_adt adt, struct ip_set_adt_opt *opt)
321 ipset_adtfn adtfn = set->variant->adt[adt];
322 struct hash_ipportip6_elem e = { };
323 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
325 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
329 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
330 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2.in6);
331 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
335 hash_ipportip6_uadt(struct ip_set *set, struct nlattr *tb[],
336 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
338 const struct hash_ipportip *h = set->data;
339 ipset_adtfn adtfn = set->variant->adt[adt];
340 struct hash_ipportip6_elem e = { };
341 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
343 bool with_ports = false;
346 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
347 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
348 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
349 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
350 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
351 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
352 tb[IPSET_ATTR_IP_TO] ||
353 tb[IPSET_ATTR_CIDR]))
354 return -IPSET_ERR_PROTOCOL;
356 if (tb[IPSET_ATTR_LINENO])
357 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
359 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
360 ip_set_get_extensions(set, tb, &ext);
364 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip2);
368 if (tb[IPSET_ATTR_PORT])
369 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
371 return -IPSET_ERR_PROTOCOL;
373 if (tb[IPSET_ATTR_PROTO]) {
374 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
375 with_ports = ip_set_proto_with_ports(e.proto);
378 return -IPSET_ERR_INVALID_PROTO;
380 return -IPSET_ERR_MISSING_PROTO;
382 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
385 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
386 ret = adtfn(set, &e, &ext, &ext, flags);
387 return ip_set_eexist(ret, flags) ? 0 : ret;
390 port = ntohs(e.port);
391 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
396 port = ntohs(h->next.port);
397 for (; port <= port_to; port++) {
398 e.port = htons(port);
399 ret = adtfn(set, &e, &ext, &ext, flags);
401 if (ret && !ip_set_eexist(ret, flags))
409 static struct ip_set_type hash_ipportip_type __read_mostly = {
410 .name = "hash:ip,port,ip",
411 .protocol = IPSET_PROTOCOL,
412 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
413 .dimension = IPSET_DIM_THREE,
414 .family = NFPROTO_UNSPEC,
415 .revision_min = IPSET_TYPE_REV_MIN,
416 .revision_max = IPSET_TYPE_REV_MAX,
417 .create = hash_ipportip_create,
419 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
420 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
421 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
422 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
423 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
424 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
427 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
428 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
429 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
430 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
431 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
432 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
433 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
434 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
435 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
436 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
437 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
443 hash_ipportip_init(void)
445 return ip_set_type_register(&hash_ipportip_type);
449 hash_ipportip_fini(void)
451 ip_set_type_unregister(&hash_ipportip_type);
454 module_init(hash_ipportip_init);
455 module_exit(hash_ipportip_fini);