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6#include <linux/jhash.h>
7#include <linux/module.h>
8#include <linux/ip.h>
9#include <linux/skbuff.h>
10#include <linux/errno.h>
11#include <linux/random.h>
12#include <net/ip.h>
13#include <net/ipv6.h>
14#include <net/netlink.h>
15#include <net/tcp.h>
16
17#include <linux/netfilter.h>
18#include <linux/netfilter/ipset/pfxlen.h>
19#include <linux/netfilter/ipset/ip_set.h>
20#include <linux/netfilter/ipset/ip_set_getport.h>
21#include <linux/netfilter/ipset/ip_set_hash.h>
22
23#define IPSET_TYPE_REV_MIN 0
24
25
26
27
28
29#define IPSET_TYPE_REV_MAX 6
30
31MODULE_LICENSE("GPL");
32MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
33IP_SET_MODULE_DESC("hash:ip,port,ip", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
34MODULE_ALIAS("ip_set_hash:ip,port,ip");
35
36
37#define HTYPE hash_ipportip
38
39
40
41
42struct hash_ipportip4_elem {
43 __be32 ip;
44 __be32 ip2;
45 __be16 port;
46 u8 proto;
47 u8 padding;
48};
49
50static bool
51hash_ipportip4_data_equal(const struct hash_ipportip4_elem *ip1,
52 const struct hash_ipportip4_elem *ip2,
53 u32 *multi)
54{
55 return ip1->ip == ip2->ip &&
56 ip1->ip2 == ip2->ip2 &&
57 ip1->port == ip2->port &&
58 ip1->proto == ip2->proto;
59}
60
61static bool
62hash_ipportip4_data_list(struct sk_buff *skb,
63 const struct hash_ipportip4_elem *data)
64{
65 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
66 nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip2) ||
67 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
68 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
69 goto nla_put_failure;
70 return false;
71
72nla_put_failure:
73 return true;
74}
75
76static void
77hash_ipportip4_data_next(struct hash_ipportip4_elem *next,
78 const struct hash_ipportip4_elem *d)
79{
80 next->ip = d->ip;
81 next->port = d->port;
82}
83
84
85#define MTYPE hash_ipportip4
86#define HOST_MASK 32
87#include "ip_set_hash_gen.h"
88
89static int
90hash_ipportip4_kadt(struct ip_set *set, const struct sk_buff *skb,
91 const struct xt_action_param *par,
92 enum ipset_adt adt, struct ip_set_adt_opt *opt)
93{
94 ipset_adtfn adtfn = set->variant->adt[adt];
95 struct hash_ipportip4_elem e = { .ip = 0 };
96 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
97
98 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
99 &e.port, &e.proto))
100 return -EINVAL;
101
102 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
103 ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2);
104 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
105}
106
107static int
108hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
109 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
110{
111 const struct hash_ipportip4 *h = set->data;
112 ipset_adtfn adtfn = set->variant->adt[adt];
113 struct hash_ipportip4_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;
117 int ret;
118
119 if (tb[IPSET_ATTR_LINENO])
120 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
121
122 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
123 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
124 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
125 return -IPSET_ERR_PROTOCOL;
126
127 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
128 if (ret)
129 return ret;
130
131 ret = ip_set_get_extensions(set, tb, &ext);
132 if (ret)
133 return ret;
134
135 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &e.ip2);
136 if (ret)
137 return ret;
138
139 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
140
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);
144
145 if (e.proto == 0)
146 return -IPSET_ERR_INVALID_PROTO;
147 } else {
148 return -IPSET_ERR_MISSING_PROTO;
149 }
150
151 if (!(with_ports || e.proto == IPPROTO_ICMP))
152 e.port = 0;
153
154 if (adt == IPSET_TEST ||
155 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
156 tb[IPSET_ATTR_PORT_TO])) {
157 ret = adtfn(set, &e, &ext, &ext, flags);
158 return ip_set_eexist(ret, flags) ? 0 : ret;
159 }
160
161 ip_to = ip = ntohl(e.ip);
162 if (tb[IPSET_ATTR_IP_TO]) {
163 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
164 if (ret)
165 return ret;
166 if (ip > ip_to)
167 swap(ip, ip_to);
168 } else if (tb[IPSET_ATTR_CIDR]) {
169 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
170
171 if (!cidr || cidr > HOST_MASK)
172 return -IPSET_ERR_INVALID_CIDR;
173 ip_set_mask_from_to(ip, ip_to, cidr);
174 }
175
176 port_to = port = ntohs(e.port);
177 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
178 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
179 if (port > port_to)
180 swap(port, port_to);
181 }
182
183 if (((u64)ip_to - ip + 1)*(port_to - port + 1) > IPSET_MAX_RANGE)
184 return -ERANGE;
185
186 if (retried)
187 ip = ntohl(h->next.ip);
188 for (; ip <= ip_to; ip++) {
189 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
190 : port;
191 for (; p <= port_to; p++) {
192 e.ip = htonl(ip);
193 e.port = htons(p);
194 ret = adtfn(set, &e, &ext, &ext, flags);
195
196 if (ret && !ip_set_eexist(ret, flags))
197 return ret;
198
199 ret = 0;
200 }
201 }
202 return ret;
203}
204
205
206
207struct hash_ipportip6_elem {
208 union nf_inet_addr ip;
209 union nf_inet_addr ip2;
210 __be16 port;
211 u8 proto;
212 u8 padding;
213};
214
215
216
217static bool
218hash_ipportip6_data_equal(const struct hash_ipportip6_elem *ip1,
219 const struct hash_ipportip6_elem *ip2,
220 u32 *multi)
221{
222 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
223 ipv6_addr_equal(&ip1->ip2.in6, &ip2->ip2.in6) &&
224 ip1->port == ip2->port &&
225 ip1->proto == ip2->proto;
226}
227
228static bool
229hash_ipportip6_data_list(struct sk_buff *skb,
230 const struct hash_ipportip6_elem *data)
231{
232 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
233 nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) ||
234 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
235 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
236 goto nla_put_failure;
237 return false;
238
239nla_put_failure:
240 return true;
241}
242
243static void
244hash_ipportip6_data_next(struct hash_ipportip6_elem *next,
245 const struct hash_ipportip6_elem *d)
246{
247 next->port = d->port;
248}
249
250#undef MTYPE
251#undef HOST_MASK
252
253#define MTYPE hash_ipportip6
254#define HOST_MASK 128
255#define IP_SET_EMIT_CREATE
256#include "ip_set_hash_gen.h"
257
258static int
259hash_ipportip6_kadt(struct ip_set *set, const struct sk_buff *skb,
260 const struct xt_action_param *par,
261 enum ipset_adt adt, struct ip_set_adt_opt *opt)
262{
263 ipset_adtfn adtfn = set->variant->adt[adt];
264 struct hash_ipportip6_elem e = { .ip = { .all = { 0 } } };
265 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
266
267 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
268 &e.port, &e.proto))
269 return -EINVAL;
270
271 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
272 ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2.in6);
273 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
274}
275
276static int
277hash_ipportip6_uadt(struct ip_set *set, struct nlattr *tb[],
278 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
279{
280 const struct hash_ipportip6 *h = set->data;
281 ipset_adtfn adtfn = set->variant->adt[adt];
282 struct hash_ipportip6_elem e = { .ip = { .all = { 0 } } };
283 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
284 u32 port, port_to;
285 bool with_ports = false;
286 int ret;
287
288 if (tb[IPSET_ATTR_LINENO])
289 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
290
291 if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
292 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
293 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
294 return -IPSET_ERR_PROTOCOL;
295 if (unlikely(tb[IPSET_ATTR_IP_TO]))
296 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
297 if (unlikely(tb[IPSET_ATTR_CIDR])) {
298 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
299
300 if (cidr != HOST_MASK)
301 return -IPSET_ERR_INVALID_CIDR;
302 }
303
304 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
305 if (ret)
306 return ret;
307
308 ret = ip_set_get_extensions(set, tb, &ext);
309 if (ret)
310 return ret;
311
312 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip2);
313 if (ret)
314 return ret;
315
316 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
317
318 if (tb[IPSET_ATTR_PROTO]) {
319 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
320 with_ports = ip_set_proto_with_ports(e.proto);
321
322 if (e.proto == 0)
323 return -IPSET_ERR_INVALID_PROTO;
324 } else {
325 return -IPSET_ERR_MISSING_PROTO;
326 }
327
328 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
329 e.port = 0;
330
331 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
332 ret = adtfn(set, &e, &ext, &ext, flags);
333 return ip_set_eexist(ret, flags) ? 0 : ret;
334 }
335
336 port = ntohs(e.port);
337 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
338 if (port > port_to)
339 swap(port, port_to);
340
341 if (retried)
342 port = ntohs(h->next.port);
343 for (; port <= port_to; port++) {
344 e.port = htons(port);
345 ret = adtfn(set, &e, &ext, &ext, flags);
346
347 if (ret && !ip_set_eexist(ret, flags))
348 return ret;
349
350 ret = 0;
351 }
352 return ret;
353}
354
355static struct ip_set_type hash_ipportip_type __read_mostly = {
356 .name = "hash:ip,port,ip",
357 .protocol = IPSET_PROTOCOL,
358 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
359 .dimension = IPSET_DIM_THREE,
360 .family = NFPROTO_UNSPEC,
361 .revision_min = IPSET_TYPE_REV_MIN,
362 .revision_max = IPSET_TYPE_REV_MAX,
363 .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
364 .create = hash_ipportip_create,
365 .create_policy = {
366 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
367 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
368 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
369 [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
370 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
371 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
372 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
373 },
374 .adt_policy = {
375 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
376 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
377 [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
378 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
379 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
380 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
381 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
382 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
383 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
384 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
385 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
386 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
387 .len = IPSET_MAX_COMMENT_SIZE },
388 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
389 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
390 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
391 },
392 .me = THIS_MODULE,
393};
394
395static int __init
396hash_ipportip_init(void)
397{
398 return ip_set_type_register(&hash_ipportip_type);
399}
400
401static void __exit
402hash_ipportip_fini(void)
403{
404 rcu_barrier();
405 ip_set_type_unregister(&hash_ipportip_type);
406}
407
408module_init(hash_ipportip_init);
409module_exit(hash_ipportip_fini);
410
