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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", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_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
49
50
51static bool
52hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
53 const struct hash_ipport4_elem *ip2,
54 u32 *multi)
55{
56 return ip1->ip == ip2->ip &&
57 ip1->port == ip2->port &&
58 ip1->proto == ip2->proto;
59}
60
61static bool
62hash_ipport4_data_list(struct sk_buff *skb,
63 const struct hash_ipport4_elem *data)
64{
65 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
66 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
67 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
68 goto nla_put_failure;
69 return false;
70
71nla_put_failure:
72 return true;
73}
74
75static void
76hash_ipport4_data_next(struct hash_ipport4_elem *next,
77 const struct hash_ipport4_elem *d)
78{
79 next->ip = d->ip;
80 next->port = d->port;
81}
82
83#define MTYPE hash_ipport4
84#define HOST_MASK 32
85#include "ip_set_hash_gen.h"
86
87static int
88hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
89 const struct xt_action_param *par,
90 enum ipset_adt adt, struct ip_set_adt_opt *opt)
91{
92 ipset_adtfn adtfn = set->variant->adt[adt];
93 struct hash_ipport4_elem e = { .ip = 0 };
94 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
95
96 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
97 &e.port, &e.proto))
98 return -EINVAL;
99
100 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
101 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
102}
103
104static int
105hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
106 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
107{
108 const struct hash_ipport4 *h = set->data;
109 ipset_adtfn adtfn = set->variant->adt[adt];
110 struct hash_ipport4_elem e = { .ip = 0 };
111 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
112 u32 ip, ip_to = 0, p = 0, port, port_to;
113 bool with_ports = false;
114 int ret;
115
116 if (tb[IPSET_ATTR_LINENO])
117 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
118
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 return -IPSET_ERR_PROTOCOL;
123
124 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
125 if (ret)
126 return ret;
127
128 ret = ip_set_get_extensions(set, tb, &ext);
129 if (ret)
130 return ret;
131
132 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
133
134 if (tb[IPSET_ATTR_PROTO]) {
135 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
136 with_ports = ip_set_proto_with_ports(e.proto);
137
138 if (e.proto == 0)
139 return -IPSET_ERR_INVALID_PROTO;
140 } else {
141 return -IPSET_ERR_MISSING_PROTO;
142 }
143
144 if (!(with_ports || e.proto == IPPROTO_ICMP))
145 e.port = 0;
146
147 if (adt == IPSET_TEST ||
148 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
149 tb[IPSET_ATTR_PORT_TO])) {
150 ret = adtfn(set, &e, &ext, &ext, flags);
151 return ip_set_eexist(ret, flags) ? 0 : ret;
152 }
153
154 ip_to = ip = ntohl(e.ip);
155 if (tb[IPSET_ATTR_IP_TO]) {
156 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
157 if (ret)
158 return ret;
159 if (ip > ip_to)
160 swap(ip, ip_to);
161 } else if (tb[IPSET_ATTR_CIDR]) {
162 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
163
164 if (!cidr || cidr > HOST_MASK)
165 return -IPSET_ERR_INVALID_CIDR;
166 ip_set_mask_from_to(ip, ip_to, cidr);
167 }
168
169 port_to = port = ntohs(e.port);
170 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
171 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
172 if (port > port_to)
173 swap(port, port_to);
174 }
175
176 if (((u64)ip_to - ip + 1)*(port_to - port + 1) > IPSET_MAX_RANGE)
177 return -ERANGE;
178
179 if (retried)
180 ip = ntohl(h->next.ip);
181 for (; ip <= ip_to; 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 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 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_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
349 .create = hash_ipport_create,
350 .create_policy = {
351 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
352 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
353 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
354 [IPSET_ATTR_BUCKETSIZE] = { .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 },
359 },
360 .adt_policy = {
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,
372 .len = IPSET_MAX_COMMENT_SIZE },
373 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
374 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
375 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
376 },
377 .me = THIS_MODULE,
378};
379
380static int __init
381hash_ipport_init(void)
382{
383 return ip_set_type_register(&hash_ipport_type);
384}
385
386static void __exit
387hash_ipport_fini(void)
388{
389 rcu_barrier();
390 ip_set_type_unregister(&hash_ipport_type);
391}
392
393module_init(hash_ipport_init);
394module_exit(hash_ipport_fini);
395
