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 #define IPSET_TYPE_REV_MAX 3 /* Comments support added */
32 MODULE_LICENSE("GPL");
33 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
34 IP_SET_MODULE_DESC("hash:ip,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
35 MODULE_ALIAS("ip_set_hash:ip,port");
37 /* Type specific function prefix */
38 #define HTYPE hash_ipport
43 struct hash_ipport4_elem {
50 /* Common functions */
53 hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
54 const struct hash_ipport4_elem *ip2,
57 return ip1->ip == ip2->ip &&
58 ip1->port == ip2->port &&
59 ip1->proto == ip2->proto;
63 hash_ipport4_data_list(struct sk_buff *skb,
64 const struct hash_ipport4_elem *data)
66 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
67 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
68 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
77 hash_ipport4_data_next(struct hash_ipport4_elem *next,
78 const struct hash_ipport4_elem *d)
84 #define MTYPE hash_ipport4
87 #define HKEY_DATALEN sizeof(struct hash_ipport4_elem)
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 = { };
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 = { };
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 (unlikely(!tb[IPSET_ATTR_IP] ||
120 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
121 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
122 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
123 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
124 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
125 return -IPSET_ERR_PROTOCOL;
127 if (tb[IPSET_ATTR_LINENO])
128 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
130 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
131 ip_set_get_extensions(set, tb, &ext);
135 if (tb[IPSET_ATTR_PORT])
136 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
138 return -IPSET_ERR_PROTOCOL;
140 if (tb[IPSET_ATTR_PROTO]) {
141 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
142 with_ports = ip_set_proto_with_ports(e.proto);
145 return -IPSET_ERR_INVALID_PROTO;
147 return -IPSET_ERR_MISSING_PROTO;
149 if (!(with_ports || e.proto == IPPROTO_ICMP))
152 if (adt == IPSET_TEST ||
153 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
154 tb[IPSET_ATTR_PORT_TO])) {
155 ret = adtfn(set, &e, &ext, &ext, flags);
156 return ip_set_eexist(ret, flags) ? 0 : ret;
159 ip_to = ip = ntohl(e.ip);
160 if (tb[IPSET_ATTR_IP_TO]) {
161 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
166 } else if (tb[IPSET_ATTR_CIDR]) {
167 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
169 if (!cidr || cidr > 32)
170 return -IPSET_ERR_INVALID_CIDR;
171 ip_set_mask_from_to(ip, ip_to, cidr);
174 port_to = port = ntohs(e.port);
175 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
176 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
182 ip = ntohl(h->next.ip);
183 for (; !before(ip_to, ip); ip++) {
184 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
186 for (; p <= port_to; p++) {
189 ret = adtfn(set, &e, &ext, &ext, flags);
191 if (ret && !ip_set_eexist(ret, flags))
202 struct hash_ipport6_elem {
203 union nf_inet_addr ip;
209 /* Common functions */
212 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
213 const struct hash_ipport6_elem *ip2,
216 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
217 ip1->port == ip2->port &&
218 ip1->proto == ip2->proto;
222 hash_ipport6_data_list(struct sk_buff *skb,
223 const struct hash_ipport6_elem *data)
225 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
226 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
227 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
228 goto nla_put_failure;
236 hash_ipport6_data_next(struct hash_ipport4_elem *next,
237 const struct hash_ipport6_elem *d)
239 next->port = d->port;
247 #define MTYPE hash_ipport6
249 #define HOST_MASK 128
250 #define HKEY_DATALEN sizeof(struct hash_ipport6_elem)
251 #define IP_SET_EMIT_CREATE
252 #include "ip_set_hash_gen.h"
255 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
256 const struct xt_action_param *par,
257 enum ipset_adt adt, struct ip_set_adt_opt *opt)
259 ipset_adtfn adtfn = set->variant->adt[adt];
260 struct hash_ipport6_elem e = { };
261 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
263 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
267 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
268 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
272 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
273 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
275 const struct hash_ipport *h = set->data;
276 ipset_adtfn adtfn = set->variant->adt[adt];
277 struct hash_ipport6_elem e = { };
278 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
280 bool with_ports = false;
283 if (unlikely(!tb[IPSET_ATTR_IP] ||
284 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
285 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
286 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
287 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
288 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
289 tb[IPSET_ATTR_IP_TO] ||
290 tb[IPSET_ATTR_CIDR]))
291 return -IPSET_ERR_PROTOCOL;
293 if (tb[IPSET_ATTR_LINENO])
294 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
296 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
297 ip_set_get_extensions(set, tb, &ext);
301 if (tb[IPSET_ATTR_PORT])
302 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
304 return -IPSET_ERR_PROTOCOL;
306 if (tb[IPSET_ATTR_PROTO]) {
307 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
308 with_ports = ip_set_proto_with_ports(e.proto);
311 return -IPSET_ERR_INVALID_PROTO;
313 return -IPSET_ERR_MISSING_PROTO;
315 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
318 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
319 ret = adtfn(set, &e, &ext, &ext, flags);
320 return ip_set_eexist(ret, flags) ? 0 : ret;
323 port = ntohs(e.port);
324 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
329 port = ntohs(h->next.port);
330 for (; port <= port_to; port++) {
331 e.port = htons(port);
332 ret = adtfn(set, &e, &ext, &ext, flags);
334 if (ret && !ip_set_eexist(ret, flags))
342 static struct ip_set_type hash_ipport_type __read_mostly = {
343 .name = "hash:ip,port",
344 .protocol = IPSET_PROTOCOL,
345 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
346 .dimension = IPSET_DIM_TWO,
347 .family = NFPROTO_UNSPEC,
348 .revision_min = IPSET_TYPE_REV_MIN,
349 .revision_max = IPSET_TYPE_REV_MAX,
350 .create = hash_ipport_create,
352 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
353 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
354 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
355 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
356 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
357 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
358 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
361 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
362 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
363 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
364 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
365 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
366 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
367 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
368 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
369 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
370 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
371 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
377 hash_ipport_init(void)
379 return ip_set_type_register(&hash_ipport_type);
383 hash_ipport_fini(void)
385 ip_set_type_unregister(&hash_ipport_type);
388 module_init(hash_ipport_init);
389 module_exit(hash_ipport_fini);