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
89 #define HKEY_DATALEN sizeof(struct hash_ipport4_elem)
90 #include "ip_set_hash_gen.h"
93 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
94 const struct xt_action_param *par,
95 enum ipset_adt adt, struct ip_set_adt_opt *opt)
97 ipset_adtfn adtfn = set->variant->adt[adt];
98 struct hash_ipport4_elem e = { .ip = 0 };
99 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
101 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
105 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
106 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
110 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
111 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
113 const struct hash_ipport *h = set->data;
114 ipset_adtfn adtfn = set->variant->adt[adt];
115 struct hash_ipport4_elem e = { .ip = 0 };
116 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
117 u32 ip, ip_to = 0, p = 0, port, port_to;
118 bool with_ports = false;
121 if (unlikely(!tb[IPSET_ATTR_IP] ||
122 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
123 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
124 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
125 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
126 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
127 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
128 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
129 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
130 return -IPSET_ERR_PROTOCOL;
132 if (tb[IPSET_ATTR_LINENO])
133 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
135 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
136 ip_set_get_extensions(set, tb, &ext);
140 if (tb[IPSET_ATTR_PORT])
141 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
143 return -IPSET_ERR_PROTOCOL;
145 if (tb[IPSET_ATTR_PROTO]) {
146 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
147 with_ports = ip_set_proto_with_ports(e.proto);
150 return -IPSET_ERR_INVALID_PROTO;
152 return -IPSET_ERR_MISSING_PROTO;
154 if (!(with_ports || e.proto == IPPROTO_ICMP))
157 if (adt == IPSET_TEST ||
158 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
159 tb[IPSET_ATTR_PORT_TO])) {
160 ret = adtfn(set, &e, &ext, &ext, flags);
161 return ip_set_eexist(ret, flags) ? 0 : ret;
164 ip_to = ip = ntohl(e.ip);
165 if (tb[IPSET_ATTR_IP_TO]) {
166 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
171 } else if (tb[IPSET_ATTR_CIDR]) {
172 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
174 if (!cidr || cidr > 32)
175 return -IPSET_ERR_INVALID_CIDR;
176 ip_set_mask_from_to(ip, ip_to, cidr);
179 port_to = port = ntohs(e.port);
180 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
181 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
187 ip = ntohl(h->next.ip);
188 for (; !before(ip_to, ip); ip++) {
189 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
191 for (; p <= port_to; p++) {
194 ret = adtfn(set, &e, &ext, &ext, flags);
196 if (ret && !ip_set_eexist(ret, flags))
207 struct hash_ipport6_elem {
208 union nf_inet_addr ip;
214 /* Common functions */
217 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
218 const struct hash_ipport6_elem *ip2,
221 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
222 ip1->port == ip2->port &&
223 ip1->proto == ip2->proto;
227 hash_ipport6_data_list(struct sk_buff *skb,
228 const struct hash_ipport6_elem *data)
230 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
231 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
232 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
233 goto nla_put_failure;
241 hash_ipport6_data_next(struct hash_ipport4_elem *next,
242 const struct hash_ipport6_elem *d)
244 next->port = d->port;
252 #define MTYPE hash_ipport6
254 #define HOST_MASK 128
255 #define HKEY_DATALEN sizeof(struct hash_ipport6_elem)
256 #define IP_SET_EMIT_CREATE
257 #include "ip_set_hash_gen.h"
260 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
261 const struct xt_action_param *par,
262 enum ipset_adt adt, struct ip_set_adt_opt *opt)
264 ipset_adtfn adtfn = set->variant->adt[adt];
265 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
266 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
268 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
272 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
273 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
277 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
278 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
280 const struct hash_ipport *h = set->data;
281 ipset_adtfn adtfn = set->variant->adt[adt];
282 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
283 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
285 bool with_ports = false;
288 if (unlikely(!tb[IPSET_ATTR_IP] ||
289 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
290 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
291 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
292 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
293 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
294 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
295 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
296 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE) ||
297 tb[IPSET_ATTR_IP_TO] ||
298 tb[IPSET_ATTR_CIDR]))
299 return -IPSET_ERR_PROTOCOL;
301 if (tb[IPSET_ATTR_LINENO])
302 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
304 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
305 ip_set_get_extensions(set, tb, &ext);
309 if (tb[IPSET_ATTR_PORT])
310 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
312 return -IPSET_ERR_PROTOCOL;
314 if (tb[IPSET_ATTR_PROTO]) {
315 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
316 with_ports = ip_set_proto_with_ports(e.proto);
319 return -IPSET_ERR_INVALID_PROTO;
321 return -IPSET_ERR_MISSING_PROTO;
323 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
326 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
327 ret = adtfn(set, &e, &ext, &ext, flags);
328 return ip_set_eexist(ret, flags) ? 0 : ret;
331 port = ntohs(e.port);
332 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
337 port = ntohs(h->next.port);
338 for (; port <= port_to; port++) {
339 e.port = htons(port);
340 ret = adtfn(set, &e, &ext, &ext, flags);
342 if (ret && !ip_set_eexist(ret, flags))
350 static struct ip_set_type hash_ipport_type __read_mostly = {
351 .name = "hash:ip,port",
352 .protocol = IPSET_PROTOCOL,
353 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
354 .dimension = IPSET_DIM_TWO,
355 .family = NFPROTO_UNSPEC,
356 .revision_min = IPSET_TYPE_REV_MIN,
357 .revision_max = IPSET_TYPE_REV_MAX,
358 .create = hash_ipport_create,
360 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
361 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
362 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
363 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
364 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
365 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
366 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
369 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
370 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
371 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
372 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
373 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
374 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
375 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
376 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
377 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
378 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
379 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
380 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
381 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
382 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
388 hash_ipport_init(void)
390 return ip_set_type_register(&hash_ipport_type);
394 hash_ipport_fini(void)
396 ip_set_type_unregister(&hash_ipport_type);
399 module_init(hash_ipport_init);
400 module_exit(hash_ipport_fini);