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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 IPSET_TYPE_REV_MIN 0
28
29
30
31
32#define IPSET_TYPE_REV_MAX 5
33
34MODULE_LICENSE("GPL");
35MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
36IP_SET_MODULE_DESC("hash:ip,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
37MODULE_ALIAS("ip_set_hash:ip,port");
38
39
40#define HTYPE hash_ipport
41
42
43
44
45struct hash_ipport4_elem {
46 __be32 ip;
47 __be16 port;
48 u8 proto;
49 u8 padding;
50};
51
52
53
54static inline bool
55hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
56 const struct hash_ipport4_elem *ip2,
57 u32 *multi)
58{
59 return ip1->ip == ip2->ip &&
60 ip1->port == ip2->port &&
61 ip1->proto == ip2->proto;
62}
63
64static bool
65hash_ipport4_data_list(struct sk_buff *skb,
66 const struct hash_ipport4_elem *data)
67{
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))
71 goto nla_put_failure;
72 return false;
73
74nla_put_failure:
75 return true;
76}
77
78static inline void
79hash_ipport4_data_next(struct hash_ipport4_elem *next,
80 const struct hash_ipport4_elem *d)
81{
82 next->ip = d->ip;
83 next->port = d->port;
84}
85
86#define MTYPE hash_ipport4
87#define HOST_MASK 32
88#include "ip_set_hash_gen.h"
89
90static int
91hash_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)
94{
95 ipset_adtfn adtfn = set->variant->adt[adt];
96 struct hash_ipport4_elem e = { .ip = 0 };
97 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
98
99 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
100 &e.port, &e.proto))
101 return -EINVAL;
102
103 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
104 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
105}
106
107static int
108hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
109 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
110{
111 const struct hash_ipport4 *h = set->data;
112 ipset_adtfn adtfn = set->variant->adt[adt];
113 struct hash_ipport4_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] ||
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 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
136
137 if (tb[IPSET_ATTR_PROTO]) {
138 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
139 with_ports = ip_set_proto_with_ports(e.proto);
140
141 if (e.proto == 0)
142 return -IPSET_ERR_INVALID_PROTO;
143 } else {
144 return -IPSET_ERR_MISSING_PROTO;
145 }
146
147 if (!(with_ports || e.proto == IPPROTO_ICMP))
148 e.port = 0;
149
150 if (adt == IPSET_TEST ||
151 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
152 tb[IPSET_ATTR_PORT_TO])) {
153 ret = adtfn(set, &e, &ext, &ext, flags);
154 return ip_set_eexist(ret, flags) ? 0 : ret;
155 }
156
157 ip_to = ip = ntohl(e.ip);
158 if (tb[IPSET_ATTR_IP_TO]) {
159 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
160 if (ret)
161 return ret;
162 if (ip > ip_to)
163 swap(ip, ip_to);
164 } else if (tb[IPSET_ATTR_CIDR]) {
165 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
166
167 if (!cidr || cidr > HOST_MASK)
168 return -IPSET_ERR_INVALID_CIDR;
169 ip_set_mask_from_to(ip, ip_to, cidr);
170 }
171
172 port_to = port = ntohs(e.port);
173 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
174 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
175 if (port > port_to)
176 swap(port, port_to);
177 }
178
179 if (retried)
180 ip = ntohl(h->next.ip);
181 for (; !before(ip_to, ip); ip++) {
182 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
183 : port;
184 for (; p <= port_to; p++) {
185 e.ip = htonl(ip);
186 e.port = htons(p);
187 ret = adtfn(set, &e, &ext, &ext, flags);
188
189 if (ret && !ip_set_eexist(ret, flags))
190 return ret;
191
192 ret = 0;
193 }
194 }
195 return ret;
196}
197
198
199
200struct hash_ipport6_elem {
201 union nf_inet_addr ip;
202 __be16 port;
203 u8 proto;
204 u8 padding;
205};
206
207
208
209static inline bool
210hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
211 const struct hash_ipport6_elem *ip2,
212 u32 *multi)
213{
214 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
215 ip1->port == ip2->port &&
216 ip1->proto == ip2->proto;
217}
218
219static bool
220hash_ipport6_data_list(struct sk_buff *skb,
221 const struct hash_ipport6_elem *data)
222{
223 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
224 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
225 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
226 goto nla_put_failure;
227 return false;
228
229nla_put_failure:
230 return true;
231}
232
233static inline void
234hash_ipport6_data_next(struct hash_ipport6_elem *next,
235 const struct hash_ipport6_elem *d)
236{
237 next->port = d->port;
238}
239
240#undef MTYPE
241#undef HOST_MASK
242
243#define MTYPE hash_ipport6
244#define HOST_MASK 128
245#define IP_SET_EMIT_CREATE
246#include "ip_set_hash_gen.h"
247
248static int
249hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
250 const struct xt_action_param *par,
251 enum ipset_adt adt, struct ip_set_adt_opt *opt)
252{
253 ipset_adtfn adtfn = set->variant->adt[adt];
254 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
255 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
256
257 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
258 &e.port, &e.proto))
259 return -EINVAL;
260
261 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
262 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
263}
264
265static int
266hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
267 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
268{
269 const struct hash_ipport6 *h = set->data;
270 ipset_adtfn adtfn = set->variant->adt[adt];
271 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
272 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
273 u32 port, port_to;
274 bool with_ports = false;
275 int ret;
276
277 if (tb[IPSET_ATTR_LINENO])
278 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
279
280 if (unlikely(!tb[IPSET_ATTR_IP] ||
281 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
282 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
283 return -IPSET_ERR_PROTOCOL;
284 if (unlikely(tb[IPSET_ATTR_IP_TO]))
285 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
286 if (unlikely(tb[IPSET_ATTR_CIDR])) {
287 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
288
289 if (cidr != HOST_MASK)
290 return -IPSET_ERR_INVALID_CIDR;
291 }
292
293 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
294 if (ret)
295 return ret;
296
297 ret = ip_set_get_extensions(set, tb, &ext);
298 if (ret)
299 return ret;
300
301 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
302
303 if (tb[IPSET_ATTR_PROTO]) {
304 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
305 with_ports = ip_set_proto_with_ports(e.proto);
306
307 if (e.proto == 0)
308 return -IPSET_ERR_INVALID_PROTO;
309 } else {
310 return -IPSET_ERR_MISSING_PROTO;
311 }
312
313 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
314 e.port = 0;
315
316 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
317 ret = adtfn(set, &e, &ext, &ext, flags);
318 return ip_set_eexist(ret, flags) ? 0 : ret;
319 }
320
321 port = ntohs(e.port);
322 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
323 if (port > port_to)
324 swap(port, port_to);
325
326 if (retried)
327 port = ntohs(h->next.port);
328 for (; port <= port_to; port++) {
329 e.port = htons(port);
330 ret = adtfn(set, &e, &ext, &ext, flags);
331
332 if (ret && !ip_set_eexist(ret, flags))
333 return ret;
334
335 ret = 0;
336 }
337 return ret;
338}
339
340static struct ip_set_type hash_ipport_type __read_mostly = {
341 .name = "hash:ip,port",
342 .protocol = IPSET_PROTOCOL,
343 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
344 .dimension = IPSET_DIM_TWO,
345 .family = NFPROTO_UNSPEC,
346 .revision_min = IPSET_TYPE_REV_MIN,
347 .revision_max = IPSET_TYPE_REV_MAX,
348 .create = hash_ipport_create,
349 .create_policy = {
350 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
351 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
352 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
353 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
354 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
355 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
356 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
357 },
358 .adt_policy = {
359 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
360 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
361 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
362 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
363 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
364 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
365 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
366 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
367 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
368 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
369 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
370 .len = IPSET_MAX_COMMENT_SIZE },
371 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
372 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
373 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
374 },
375 .me = THIS_MODULE,
376};
377
378static int __init
379hash_ipport_init(void)
380{
381 return ip_set_type_register(&hash_ipport_type);
382}
383
384static void __exit
385hash_ipport_fini(void)
386{
387 rcu_barrier();
388 ip_set_type_unregister(&hash_ipport_type);
389}
390
391module_init(hash_ipport_init);
392module_exit(hash_ipport_fini);
393
