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10#include <linux/jhash.h>
11#include <linux/module.h>
12#include <linux/ip.h>
13#include <linux/skbuff.h>
14#include <linux/errno.h>
15#include <linux/random.h>
16#include <net/ip.h>
17#include <net/ipv6.h>
18#include <net/netlink.h>
19#include <net/tcp.h>
20
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>
26
27#define REVISION_MIN 0
28
29#define REVISION_MAX 2
30
31MODULE_LICENSE("GPL");
32MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
33IP_SET_MODULE_DESC("hash:ip,port", REVISION_MIN, REVISION_MAX);
34MODULE_ALIAS("ip_set_hash:ip,port");
35
36
37#define HTYPE hash_ipport
38
39
40
41
42struct hash_ipport4_elem {
43 __be32 ip;
44 __be16 port;
45 u8 proto;
46 u8 padding;
47};
48
49struct hash_ipport4t_elem {
50 __be32 ip;
51 __be16 port;
52 u8 proto;
53 u8 padding;
54 unsigned long timeout;
55};
56
57struct hash_ipport4c_elem {
58 __be32 ip;
59 __be16 port;
60 u8 proto;
61 u8 padding;
62 struct ip_set_counter counter;
63};
64
65struct hash_ipport4ct_elem {
66 __be32 ip;
67 __be16 port;
68 u8 proto;
69 u8 padding;
70 struct ip_set_counter counter;
71 unsigned long timeout;
72};
73
74
75
76static inline bool
77hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
78 const struct hash_ipport4_elem *ip2,
79 u32 *multi)
80{
81 return ip1->ip == ip2->ip &&
82 ip1->port == ip2->port &&
83 ip1->proto == ip2->proto;
84}
85
86static bool
87hash_ipport4_data_list(struct sk_buff *skb,
88 const struct hash_ipport4_elem *data)
89{
90 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
91 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
92 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
93 goto nla_put_failure;
94 return 0;
95
96nla_put_failure:
97 return 1;
98}
99
100static inline void
101hash_ipport4_data_next(struct hash_ipport4_elem *next,
102 const struct hash_ipport4_elem *d)
103{
104 next->ip = d->ip;
105 next->port = d->port;
106}
107
108#define MTYPE hash_ipport4
109#define PF 4
110#define HOST_MASK 32
111#define HKEY_DATALEN sizeof(struct hash_ipport4_elem)
112#include "ip_set_hash_gen.h"
113
114static int
115hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
116 const struct xt_action_param *par,
117 enum ipset_adt adt, struct ip_set_adt_opt *opt)
118{
119 const struct hash_ipport *h = set->data;
120 ipset_adtfn adtfn = set->variant->adt[adt];
121 struct hash_ipport4_elem e = { };
122 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
123
124 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
125 &e.port, &e.proto))
126 return -EINVAL;
127
128 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
129 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
130}
131
132static int
133hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
134 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
135{
136 const struct hash_ipport *h = set->data;
137 ipset_adtfn adtfn = set->variant->adt[adt];
138 struct hash_ipport4_elem e = { };
139 struct ip_set_ext ext = IP_SET_INIT_UEXT(h);
140 u32 ip, ip_to, p = 0, port, port_to;
141 bool with_ports = false;
142 int ret;
143
144 if (unlikely(!tb[IPSET_ATTR_IP] ||
145 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
146 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
147 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
148 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
149 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
150 return -IPSET_ERR_PROTOCOL;
151
152 if (tb[IPSET_ATTR_LINENO])
153 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
154
155 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
156 ip_set_get_extensions(set, tb, &ext);
157 if (ret)
158 return ret;
159
160 if (tb[IPSET_ATTR_PORT])
161 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
162 else
163 return -IPSET_ERR_PROTOCOL;
164
165 if (tb[IPSET_ATTR_PROTO]) {
166 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
167 with_ports = ip_set_proto_with_ports(e.proto);
168
169 if (e.proto == 0)
170 return -IPSET_ERR_INVALID_PROTO;
171 } else
172 return -IPSET_ERR_MISSING_PROTO;
173
174 if (!(with_ports || e.proto == IPPROTO_ICMP))
175 e.port = 0;
176
177 if (adt == IPSET_TEST ||
178 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
179 tb[IPSET_ATTR_PORT_TO])) {
180 ret = adtfn(set, &e, &ext, &ext, flags);
181 return ip_set_eexist(ret, flags) ? 0 : ret;
182 }
183
184 ip_to = ip = ntohl(e.ip);
185 if (tb[IPSET_ATTR_IP_TO]) {
186 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
187 if (ret)
188 return ret;
189 if (ip > ip_to)
190 swap(ip, ip_to);
191 } else if (tb[IPSET_ATTR_CIDR]) {
192 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
193
194 if (!cidr || cidr > 32)
195 return -IPSET_ERR_INVALID_CIDR;
196 ip_set_mask_from_to(ip, ip_to, cidr);
197 }
198
199 port_to = port = ntohs(e.port);
200 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
201 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
202 if (port > port_to)
203 swap(port, port_to);
204 }
205
206 if (retried)
207 ip = ntohl(h->next.ip);
208 for (; !before(ip_to, ip); ip++) {
209 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
210 : port;
211 for (; p <= port_to; p++) {
212 e.ip = htonl(ip);
213 e.port = htons(p);
214 ret = adtfn(set, &e, &ext, &ext, flags);
215
216 if (ret && !ip_set_eexist(ret, flags))
217 return ret;
218 else
219 ret = 0;
220 }
221 }
222 return ret;
223}
224
225
226
227struct hash_ipport6_elem {
228 union nf_inet_addr ip;
229 __be16 port;
230 u8 proto;
231 u8 padding;
232};
233
234struct hash_ipport6t_elem {
235 union nf_inet_addr ip;
236 __be16 port;
237 u8 proto;
238 u8 padding;
239 unsigned long timeout;
240};
241
242struct hash_ipport6c_elem {
243 union nf_inet_addr ip;
244 __be16 port;
245 u8 proto;
246 u8 padding;
247 struct ip_set_counter counter;
248};
249
250struct hash_ipport6ct_elem {
251 union nf_inet_addr ip;
252 __be16 port;
253 u8 proto;
254 u8 padding;
255 struct ip_set_counter counter;
256 unsigned long timeout;
257};
258
259
260
261static inline bool
262hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
263 const struct hash_ipport6_elem *ip2,
264 u32 *multi)
265{
266 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
267 ip1->port == ip2->port &&
268 ip1->proto == ip2->proto;
269}
270
271static bool
272hash_ipport6_data_list(struct sk_buff *skb,
273 const struct hash_ipport6_elem *data)
274{
275 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
276 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
277 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
278 goto nla_put_failure;
279 return 0;
280
281nla_put_failure:
282 return 1;
283}
284
285static inline void
286hash_ipport6_data_next(struct hash_ipport4_elem *next,
287 const struct hash_ipport6_elem *d)
288{
289 next->port = d->port;
290}
291
292#undef MTYPE
293#undef PF
294#undef HOST_MASK
295#undef HKEY_DATALEN
296
297#define MTYPE hash_ipport6
298#define PF 6
299#define HOST_MASK 128
300#define HKEY_DATALEN sizeof(struct hash_ipport6_elem)
301#define IP_SET_EMIT_CREATE
302#include "ip_set_hash_gen.h"
303
304static int
305hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
306 const struct xt_action_param *par,
307 enum ipset_adt adt, struct ip_set_adt_opt *opt)
308{
309 const struct hash_ipport *h = set->data;
310 ipset_adtfn adtfn = set->variant->adt[adt];
311 struct hash_ipport6_elem e = { };
312 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
313
314 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
315 &e.port, &e.proto))
316 return -EINVAL;
317
318 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
319 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
320}
321
322static int
323hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
324 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
325{
326 const struct hash_ipport *h = set->data;
327 ipset_adtfn adtfn = set->variant->adt[adt];
328 struct hash_ipport6_elem e = { };
329 struct ip_set_ext ext = IP_SET_INIT_UEXT(h);
330 u32 port, port_to;
331 bool with_ports = false;
332 int ret;
333
334 if (unlikely(!tb[IPSET_ATTR_IP] ||
335 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
336 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
337 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
338 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
339 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
340 tb[IPSET_ATTR_IP_TO] ||
341 tb[IPSET_ATTR_CIDR]))
342 return -IPSET_ERR_PROTOCOL;
343
344 if (tb[IPSET_ATTR_LINENO])
345 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
346
347 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
348 ip_set_get_extensions(set, tb, &ext);
349 if (ret)
350 return ret;
351
352 if (tb[IPSET_ATTR_PORT])
353 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
354 else
355 return -IPSET_ERR_PROTOCOL;
356
357 if (tb[IPSET_ATTR_PROTO]) {
358 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
359 with_ports = ip_set_proto_with_ports(e.proto);
360
361 if (e.proto == 0)
362 return -IPSET_ERR_INVALID_PROTO;
363 } else
364 return -IPSET_ERR_MISSING_PROTO;
365
366 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
367 e.port = 0;
368
369 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
370 ret = adtfn(set, &e, &ext, &ext, flags);
371 return ip_set_eexist(ret, flags) ? 0 : ret;
372 }
373
374 port = ntohs(e.port);
375 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
376 if (port > port_to)
377 swap(port, port_to);
378
379 if (retried)
380 port = ntohs(h->next.port);
381 for (; port <= port_to; port++) {
382 e.port = htons(port);
383 ret = adtfn(set, &e, &ext, &ext, flags);
384
385 if (ret && !ip_set_eexist(ret, flags))
386 return ret;
387 else
388 ret = 0;
389 }
390 return ret;
391}
392
393static struct ip_set_type hash_ipport_type __read_mostly = {
394 .name = "hash:ip,port",
395 .protocol = IPSET_PROTOCOL,
396 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
397 .dimension = IPSET_DIM_TWO,
398 .family = NFPROTO_UNSPEC,
399 .revision_min = REVISION_MIN,
400 .revision_max = REVISION_MAX,
401 .create = hash_ipport_create,
402 .create_policy = {
403 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
404 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
405 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
406 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
407 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
408 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
409 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
410 },
411 .adt_policy = {
412 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
413 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
414 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
415 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
416 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
417 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
418 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
419 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
420 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
421 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
422 },
423 .me = THIS_MODULE,
424};
425
426static int __init
427hash_ipport_init(void)
428{
429 return ip_set_type_register(&hash_ipport_type);
430}
431
432static void __exit
433hash_ipport_fini(void)
434{
435 ip_set_type_unregister(&hash_ipport_type);
436}
437
438module_init(hash_ipport_init);
439module_exit(hash_ipport_fini);
440
