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 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 /* 2 Counters support added */
30 /* 3 Comments support added */
31 /* 4 Forceadd support added */
32 #define IPSET_TYPE_REV_MAX 5 /* skbinfo support added */
34 MODULE_LICENSE("GPL");
35 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
36 IP_SET_MODULE_DESC("hash:ip,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
37 MODULE_ALIAS("ip_set_hash:ip,port");
39 /* Type specific function prefix */
40 #define HTYPE hash_ipport
45 struct hash_ipport4_elem {
52 /* Common functions */
55 hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
56 const struct hash_ipport4_elem *ip2,
59 return ip1->ip == ip2->ip &&
60 ip1->port == ip2->port &&
61 ip1->proto == ip2->proto;
65 hash_ipport4_data_list(struct sk_buff *skb,
66 const struct hash_ipport4_elem *data)
68 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
69 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
70 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
79 hash_ipport4_data_next(struct hash_ipport4_elem *next,
80 const struct hash_ipport4_elem *d)
86 #define MTYPE hash_ipport4
88 #include "ip_set_hash_gen.h"
91 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
92 const struct xt_action_param *par,
93 enum ipset_adt adt, struct ip_set_adt_opt *opt)
95 ipset_adtfn adtfn = set->variant->adt[adt];
96 struct hash_ipport4_elem e = { .ip = 0 };
97 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
99 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
103 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
104 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
108 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
109 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
111 const struct hash_ipport *h = set->data;
112 ipset_adtfn adtfn = set->variant->adt[adt];
113 struct hash_ipport4_elem e = { .ip = 0 };
114 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
115 u32 ip, ip_to = 0, p = 0, port, port_to;
116 bool with_ports = false;
119 if (tb[IPSET_ATTR_LINENO])
120 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
122 if (unlikely(!tb[IPSET_ATTR_IP] ||
123 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
124 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
125 return -IPSET_ERR_PROTOCOL;
127 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
131 ret = ip_set_get_extensions(set, tb, &ext);
135 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
137 if (tb[IPSET_ATTR_PROTO]) {
138 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
139 with_ports = ip_set_proto_with_ports(e.proto);
142 return -IPSET_ERR_INVALID_PROTO;
144 return -IPSET_ERR_MISSING_PROTO;
147 if (!(with_ports || e.proto == IPPROTO_ICMP))
150 if (adt == IPSET_TEST ||
151 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
152 tb[IPSET_ATTR_PORT_TO])) {
153 ret = adtfn(set, &e, &ext, &ext, flags);
154 return ip_set_eexist(ret, flags) ? 0 : ret;
157 ip_to = ip = ntohl(e.ip);
158 if (tb[IPSET_ATTR_IP_TO]) {
159 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
164 } else if (tb[IPSET_ATTR_CIDR]) {
165 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
167 if (!cidr || cidr > HOST_MASK)
168 return -IPSET_ERR_INVALID_CIDR;
169 ip_set_mask_from_to(ip, ip_to, cidr);
172 port_to = port = ntohs(e.port);
173 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
174 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
180 ip = ntohl(h->next.ip);
181 for (; !before(ip_to, ip); ip++) {
182 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
184 for (; p <= port_to; p++) {
187 ret = adtfn(set, &e, &ext, &ext, flags);
189 if (ret && !ip_set_eexist(ret, flags))
200 struct hash_ipport6_elem {
201 union nf_inet_addr ip;
207 /* Common functions */
210 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
211 const struct hash_ipport6_elem *ip2,
214 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
215 ip1->port == ip2->port &&
216 ip1->proto == ip2->proto;
220 hash_ipport6_data_list(struct sk_buff *skb,
221 const struct hash_ipport6_elem *data)
223 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
224 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
225 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
226 goto nla_put_failure;
234 hash_ipport6_data_next(struct hash_ipport4_elem *next,
235 const struct hash_ipport6_elem *d)
237 next->port = d->port;
243 #define MTYPE hash_ipport6
244 #define HOST_MASK 128
245 #define IP_SET_EMIT_CREATE
246 #include "ip_set_hash_gen.h"
249 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
250 const struct xt_action_param *par,
251 enum ipset_adt adt, struct ip_set_adt_opt *opt)
253 ipset_adtfn adtfn = set->variant->adt[adt];
254 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
255 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
257 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
261 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
262 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
266 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
267 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
269 const struct hash_ipport *h = set->data;
270 ipset_adtfn adtfn = set->variant->adt[adt];
271 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
272 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
274 bool with_ports = false;
277 if (tb[IPSET_ATTR_LINENO])
278 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
280 if (unlikely(!tb[IPSET_ATTR_IP] ||
281 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
282 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
283 return -IPSET_ERR_PROTOCOL;
284 if (unlikely(tb[IPSET_ATTR_IP_TO]))
285 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
286 if (unlikely(tb[IPSET_ATTR_CIDR])) {
287 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
289 if (cidr != HOST_MASK)
290 return -IPSET_ERR_INVALID_CIDR;
293 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
297 ret = ip_set_get_extensions(set, tb, &ext);
301 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
303 if (tb[IPSET_ATTR_PROTO]) {
304 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
305 with_ports = ip_set_proto_with_ports(e.proto);
308 return -IPSET_ERR_INVALID_PROTO;
310 return -IPSET_ERR_MISSING_PROTO;
313 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
316 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
317 ret = adtfn(set, &e, &ext, &ext, flags);
318 return ip_set_eexist(ret, flags) ? 0 : ret;
321 port = ntohs(e.port);
322 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
327 port = ntohs(h->next.port);
328 for (; port <= port_to; port++) {
329 e.port = htons(port);
330 ret = adtfn(set, &e, &ext, &ext, flags);
332 if (ret && !ip_set_eexist(ret, flags))
340 static struct ip_set_type hash_ipport_type __read_mostly = {
341 .name = "hash:ip,port",
342 .protocol = IPSET_PROTOCOL,
343 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
344 .dimension = IPSET_DIM_TWO,
345 .family = NFPROTO_UNSPEC,
346 .revision_min = IPSET_TYPE_REV_MIN,
347 .revision_max = IPSET_TYPE_REV_MAX,
348 .create = hash_ipport_create,
350 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
351 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
352 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
353 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
354 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
355 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
356 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
359 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
360 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
361 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
362 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
363 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
364 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
365 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
366 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
367 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
368 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
369 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
370 .len = IPSET_MAX_COMMENT_SIZE },
371 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
372 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
373 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
379 hash_ipport_init(void)
381 return ip_set_type_register(&hash_ipport_type);
385 hash_ipport_fini(void)
388 ip_set_type_unregister(&hash_ipport_type);
391 module_init(hash_ipport_init);
392 module_exit(hash_ipport_fini);