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 #define IPSET_TYPE_REV_MAX 4 /* Forceadd support added */
33 MODULE_LICENSE("GPL");
34 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
35 IP_SET_MODULE_DESC("hash:ip,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
36 MODULE_ALIAS("ip_set_hash:ip,port");
38 /* Type specific function prefix */
39 #define HTYPE hash_ipport
44 struct hash_ipport4_elem {
51 /* Common functions */
54 hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
55 const struct hash_ipport4_elem *ip2,
58 return ip1->ip == ip2->ip &&
59 ip1->port == ip2->port &&
60 ip1->proto == ip2->proto;
64 hash_ipport4_data_list(struct sk_buff *skb,
65 const struct hash_ipport4_elem *data)
67 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
68 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
69 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
78 hash_ipport4_data_next(struct hash_ipport4_elem *next,
79 const struct hash_ipport4_elem *d)
85 #define MTYPE hash_ipport4
88 #define HKEY_DATALEN sizeof(struct hash_ipport4_elem)
89 #include "ip_set_hash_gen.h"
92 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
93 const struct xt_action_param *par,
94 enum ipset_adt adt, struct ip_set_adt_opt *opt)
96 ipset_adtfn adtfn = set->variant->adt[adt];
97 struct hash_ipport4_elem e = { };
98 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
100 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
104 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
105 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
109 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
110 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
112 const struct hash_ipport *h = set->data;
113 ipset_adtfn adtfn = set->variant->adt[adt];
114 struct hash_ipport4_elem e = { };
115 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
116 u32 ip, ip_to = 0, p = 0, port, port_to;
117 bool with_ports = false;
120 if (unlikely(!tb[IPSET_ATTR_IP] ||
121 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
122 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
123 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
124 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
125 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
126 return -IPSET_ERR_PROTOCOL;
128 if (tb[IPSET_ATTR_LINENO])
129 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
131 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
132 ip_set_get_extensions(set, tb, &ext);
136 if (tb[IPSET_ATTR_PORT])
137 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
139 return -IPSET_ERR_PROTOCOL;
141 if (tb[IPSET_ATTR_PROTO]) {
142 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
143 with_ports = ip_set_proto_with_ports(e.proto);
146 return -IPSET_ERR_INVALID_PROTO;
148 return -IPSET_ERR_MISSING_PROTO;
150 if (!(with_ports || e.proto == IPPROTO_ICMP))
153 if (adt == IPSET_TEST ||
154 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
155 tb[IPSET_ATTR_PORT_TO])) {
156 ret = adtfn(set, &e, &ext, &ext, flags);
157 return ip_set_eexist(ret, flags) ? 0 : ret;
160 ip_to = ip = ntohl(e.ip);
161 if (tb[IPSET_ATTR_IP_TO]) {
162 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
167 } else if (tb[IPSET_ATTR_CIDR]) {
168 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
170 if (!cidr || cidr > 32)
171 return -IPSET_ERR_INVALID_CIDR;
172 ip_set_mask_from_to(ip, ip_to, cidr);
175 port_to = port = ntohs(e.port);
176 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
177 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
183 ip = ntohl(h->next.ip);
184 for (; !before(ip_to, ip); ip++) {
185 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
187 for (; p <= port_to; p++) {
190 ret = adtfn(set, &e, &ext, &ext, flags);
192 if (ret && !ip_set_eexist(ret, flags))
203 struct hash_ipport6_elem {
204 union nf_inet_addr ip;
210 /* Common functions */
213 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
214 const struct hash_ipport6_elem *ip2,
217 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
218 ip1->port == ip2->port &&
219 ip1->proto == ip2->proto;
223 hash_ipport6_data_list(struct sk_buff *skb,
224 const struct hash_ipport6_elem *data)
226 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
227 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
228 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
229 goto nla_put_failure;
237 hash_ipport6_data_next(struct hash_ipport4_elem *next,
238 const struct hash_ipport6_elem *d)
240 next->port = d->port;
248 #define MTYPE hash_ipport6
250 #define HOST_MASK 128
251 #define HKEY_DATALEN sizeof(struct hash_ipport6_elem)
252 #define IP_SET_EMIT_CREATE
253 #include "ip_set_hash_gen.h"
256 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
257 const struct xt_action_param *par,
258 enum ipset_adt adt, struct ip_set_adt_opt *opt)
260 ipset_adtfn adtfn = set->variant->adt[adt];
261 struct hash_ipport6_elem e = { };
262 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
264 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
268 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
269 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
273 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
274 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
276 const struct hash_ipport *h = set->data;
277 ipset_adtfn adtfn = set->variant->adt[adt];
278 struct hash_ipport6_elem e = { };
279 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
281 bool with_ports = false;
284 if (unlikely(!tb[IPSET_ATTR_IP] ||
285 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
286 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
287 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
288 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
289 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
290 tb[IPSET_ATTR_IP_TO] ||
291 tb[IPSET_ATTR_CIDR]))
292 return -IPSET_ERR_PROTOCOL;
294 if (tb[IPSET_ATTR_LINENO])
295 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
297 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
298 ip_set_get_extensions(set, tb, &ext);
302 if (tb[IPSET_ATTR_PORT])
303 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
305 return -IPSET_ERR_PROTOCOL;
307 if (tb[IPSET_ATTR_PROTO]) {
308 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
309 with_ports = ip_set_proto_with_ports(e.proto);
312 return -IPSET_ERR_INVALID_PROTO;
314 return -IPSET_ERR_MISSING_PROTO;
316 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
319 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
320 ret = adtfn(set, &e, &ext, &ext, flags);
321 return ip_set_eexist(ret, flags) ? 0 : ret;
324 port = ntohs(e.port);
325 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
330 port = ntohs(h->next.port);
331 for (; port <= port_to; port++) {
332 e.port = htons(port);
333 ret = adtfn(set, &e, &ext, &ext, flags);
335 if (ret && !ip_set_eexist(ret, flags))
343 static struct ip_set_type hash_ipport_type __read_mostly = {
344 .name = "hash:ip,port",
345 .protocol = IPSET_PROTOCOL,
346 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
347 .dimension = IPSET_DIM_TWO,
348 .family = NFPROTO_UNSPEC,
349 .revision_min = IPSET_TYPE_REV_MIN,
350 .revision_max = IPSET_TYPE_REV_MAX,
351 .create = hash_ipport_create,
353 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
354 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
355 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
356 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
357 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
358 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
359 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
362 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
363 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
364 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
365 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
366 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
367 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
368 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
369 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
370 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
371 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
372 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
378 hash_ipport_init(void)
380 return ip_set_type_register(&hash_ipport_type);
384 hash_ipport_fini(void)
386 ip_set_type_unregister(&hash_ipport_type);
389 module_init(hash_ipport_init);
390 module_exit(hash_ipport_fini);