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41d22f7b JK |
1 | /* Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
2 | * | |
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. | |
6 | */ | |
7 | ||
8 | /* Kernel module implementing an IP set type: the hash:ip,port,net type */ | |
9 | ||
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> | |
41d22f7b JK |
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_timeout.h> | |
25 | #include <linux/netfilter/ipset/ip_set_getport.h> | |
26 | #include <linux/netfilter/ipset/ip_set_hash.h> | |
27 | ||
10111a6e JK |
28 | #define REVISION_MIN 0 |
29 | /* 1 SCTP and UDPLITE support added */ | |
30 | /* 2 Range as input support for IPv4 added */ | |
31 | #define REVISION_MAX 3 /* nomatch flag support added */ | |
32 | ||
41d22f7b JK |
33 | MODULE_LICENSE("GPL"); |
34 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); | |
10111a6e | 35 | IP_SET_MODULE_DESC("hash:ip,port,net", REVISION_MIN, REVISION_MAX); |
41d22f7b JK |
36 | MODULE_ALIAS("ip_set_hash:ip,port,net"); |
37 | ||
38 | /* Type specific function prefix */ | |
39 | #define TYPE hash_ipportnet | |
40 | ||
41 | static bool | |
42 | hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b); | |
43 | ||
44 | #define hash_ipportnet4_same_set hash_ipportnet_same_set | |
45 | #define hash_ipportnet6_same_set hash_ipportnet_same_set | |
46 | ||
47 | /* The type variant functions: IPv4 */ | |
48 | ||
2a7cef2a JK |
49 | /* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0 |
50 | * However this way we have to store internally cidr - 1, | |
51 | * dancing back and forth. | |
52 | */ | |
53 | #define IP_SET_HASH_WITH_NETS_PACKED | |
54 | ||
41d22f7b JK |
55 | /* Member elements without timeout */ |
56 | struct hash_ipportnet4_elem { | |
57 | __be32 ip; | |
58 | __be32 ip2; | |
59 | __be16 port; | |
2a7cef2a JK |
60 | u8 cidr:7; |
61 | u8 nomatch:1; | |
41d22f7b JK |
62 | u8 proto; |
63 | }; | |
64 | ||
65 | /* Member elements with timeout support */ | |
66 | struct hash_ipportnet4_telem { | |
67 | __be32 ip; | |
68 | __be32 ip2; | |
69 | __be16 port; | |
2a7cef2a JK |
70 | u8 cidr:7; |
71 | u8 nomatch:1; | |
41d22f7b JK |
72 | u8 proto; |
73 | unsigned long timeout; | |
74 | }; | |
75 | ||
76 | static inline bool | |
77 | hash_ipportnet4_data_equal(const struct hash_ipportnet4_elem *ip1, | |
89dc79b7 JK |
78 | const struct hash_ipportnet4_elem *ip2, |
79 | u32 *multi) | |
41d22f7b JK |
80 | { |
81 | return ip1->ip == ip2->ip && | |
82 | ip1->ip2 == ip2->ip2 && | |
83 | ip1->cidr == ip2->cidr && | |
84 | ip1->port == ip2->port && | |
85 | ip1->proto == ip2->proto; | |
86 | } | |
87 | ||
88 | static inline bool | |
89 | hash_ipportnet4_data_isnull(const struct hash_ipportnet4_elem *elem) | |
90 | { | |
91 | return elem->proto == 0; | |
92 | } | |
93 | ||
94 | static inline void | |
95 | hash_ipportnet4_data_copy(struct hash_ipportnet4_elem *dst, | |
96 | const struct hash_ipportnet4_elem *src) | |
97 | { | |
98 | memcpy(dst, src, sizeof(*dst)); | |
99 | } | |
100 | ||
2a7cef2a JK |
101 | static inline void |
102 | hash_ipportnet4_data_flags(struct hash_ipportnet4_elem *dst, u32 flags) | |
103 | { | |
104 | dst->nomatch = !!(flags & IPSET_FLAG_NOMATCH); | |
105 | } | |
106 | ||
3e0304a5 | 107 | static inline int |
2a7cef2a JK |
108 | hash_ipportnet4_data_match(const struct hash_ipportnet4_elem *elem) |
109 | { | |
3e0304a5 | 110 | return elem->nomatch ? -ENOTEMPTY : 1; |
2a7cef2a JK |
111 | } |
112 | ||
41d22f7b JK |
113 | static inline void |
114 | hash_ipportnet4_data_netmask(struct hash_ipportnet4_elem *elem, u8 cidr) | |
115 | { | |
116 | elem->ip2 &= ip_set_netmask(cidr); | |
2a7cef2a | 117 | elem->cidr = cidr - 1; |
41d22f7b JK |
118 | } |
119 | ||
120 | static inline void | |
121 | hash_ipportnet4_data_zero_out(struct hash_ipportnet4_elem *elem) | |
122 | { | |
123 | elem->proto = 0; | |
124 | } | |
125 | ||
126 | static bool | |
127 | hash_ipportnet4_data_list(struct sk_buff *skb, | |
128 | const struct hash_ipportnet4_elem *data) | |
129 | { | |
2a7cef2a JK |
130 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
131 | ||
7cf7899d DM |
132 | if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) || |
133 | nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip2) || | |
134 | nla_put_net16(skb, IPSET_ATTR_PORT, data->port) || | |
135 | nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) || | |
136 | nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) || | |
137 | (flags && | |
138 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) | |
139 | goto nla_put_failure; | |
41d22f7b JK |
140 | return 0; |
141 | ||
142 | nla_put_failure: | |
143 | return 1; | |
144 | } | |
145 | ||
146 | static bool | |
147 | hash_ipportnet4_data_tlist(struct sk_buff *skb, | |
148 | const struct hash_ipportnet4_elem *data) | |
149 | { | |
150 | const struct hash_ipportnet4_telem *tdata = | |
151 | (const struct hash_ipportnet4_telem *)data; | |
2a7cef2a | 152 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
41d22f7b | 153 | |
7cf7899d DM |
154 | if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, tdata->ip) || |
155 | nla_put_ipaddr4(skb, IPSET_ATTR_IP2, tdata->ip2) || | |
156 | nla_put_net16(skb, IPSET_ATTR_PORT, tdata->port) || | |
157 | nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) || | |
158 | nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) || | |
159 | nla_put_net32(skb, IPSET_ATTR_TIMEOUT, | |
160 | htonl(ip_set_timeout_get(tdata->timeout))) || | |
161 | (flags && | |
162 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) | |
163 | goto nla_put_failure; | |
41d22f7b JK |
164 | return 0; |
165 | ||
166 | nla_put_failure: | |
167 | return 1; | |
168 | } | |
169 | ||
170 | #define IP_SET_HASH_WITH_PROTO | |
171 | #define IP_SET_HASH_WITH_NETS | |
172 | ||
173 | #define PF 4 | |
174 | #define HOST_MASK 32 | |
175 | #include <linux/netfilter/ipset/ip_set_ahash.h> | |
176 | ||
3d14b171 JK |
177 | static inline void |
178 | hash_ipportnet4_data_next(struct ip_set_hash *h, | |
179 | const struct hash_ipportnet4_elem *d) | |
180 | { | |
6e27c9b4 JK |
181 | h->next.ip = d->ip; |
182 | h->next.port = d->port; | |
183 | h->next.ip2 = d->ip2; | |
3d14b171 JK |
184 | } |
185 | ||
41d22f7b JK |
186 | static int |
187 | hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb, | |
b66554cf | 188 | const struct xt_action_param *par, |
ac8cc925 | 189 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
41d22f7b JK |
190 | { |
191 | const struct ip_set_hash *h = set->data; | |
192 | ipset_adtfn adtfn = set->variant->adt[adt]; | |
9b03a5ef | 193 | struct hash_ipportnet4_elem data = { |
2a7cef2a | 194 | .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1 |
9b03a5ef | 195 | }; |
41d22f7b | 196 | |
41d22f7b | 197 | if (adt == IPSET_TEST) |
2a7cef2a | 198 | data.cidr = HOST_MASK - 1; |
41d22f7b | 199 | |
ac8cc925 | 200 | if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC, |
41d22f7b JK |
201 | &data.port, &data.proto)) |
202 | return -EINVAL; | |
203 | ||
ac8cc925 JK |
204 | ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip); |
205 | ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2); | |
2a7cef2a | 206 | data.ip2 &= ip_set_netmask(data.cidr + 1); |
41d22f7b | 207 | |
ac8cc925 | 208 | return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags); |
41d22f7b JK |
209 | } |
210 | ||
211 | static int | |
212 | hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[], | |
3d14b171 | 213 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
41d22f7b JK |
214 | { |
215 | const struct ip_set_hash *h = set->data; | |
216 | ipset_adtfn adtfn = set->variant->adt[adt]; | |
2a7cef2a | 217 | struct hash_ipportnet4_elem data = { .cidr = HOST_MASK - 1 }; |
4fe198e6 JK |
218 | u32 ip, ip_to, p = 0, port, port_to; |
219 | u32 ip2_from, ip2_to, ip2_last, ip2; | |
41d22f7b | 220 | u32 timeout = h->timeout; |
5e0c1eb7 | 221 | bool with_ports = false; |
2a7cef2a | 222 | u8 cidr; |
41d22f7b JK |
223 | int ret; |
224 | ||
225 | if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] || | |
226 | !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) || | |
227 | !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) || | |
2a7cef2a JK |
228 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || |
229 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) | |
41d22f7b JK |
230 | return -IPSET_ERR_PROTOCOL; |
231 | ||
232 | if (tb[IPSET_ATTR_LINENO]) | |
233 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); | |
234 | ||
d0d9e0a5 | 235 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip); |
41d22f7b JK |
236 | if (ret) |
237 | return ret; | |
238 | ||
d0d9e0a5 | 239 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from); |
41d22f7b JK |
240 | if (ret) |
241 | return ret; | |
242 | ||
d0d9e0a5 | 243 | if (tb[IPSET_ATTR_CIDR2]) { |
2a7cef2a JK |
244 | cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]); |
245 | if (!cidr || cidr > HOST_MASK) | |
d0d9e0a5 | 246 | return -IPSET_ERR_INVALID_CIDR; |
2a7cef2a | 247 | data.cidr = cidr - 1; |
d0d9e0a5 | 248 | } |
41d22f7b JK |
249 | |
250 | if (tb[IPSET_ATTR_PORT]) | |
251 | data.port = nla_get_be16(tb[IPSET_ATTR_PORT]); | |
252 | else | |
253 | return -IPSET_ERR_PROTOCOL; | |
254 | ||
255 | if (tb[IPSET_ATTR_PROTO]) { | |
256 | data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]); | |
5e0c1eb7 | 257 | with_ports = ip_set_proto_with_ports(data.proto); |
41d22f7b JK |
258 | |
259 | if (data.proto == 0) | |
260 | return -IPSET_ERR_INVALID_PROTO; | |
261 | } else | |
262 | return -IPSET_ERR_MISSING_PROTO; | |
263 | ||
5e0c1eb7 | 264 | if (!(with_ports || data.proto == IPPROTO_ICMP)) |
41d22f7b | 265 | data.port = 0; |
41d22f7b JK |
266 | |
267 | if (tb[IPSET_ATTR_TIMEOUT]) { | |
268 | if (!with_timeout(h->timeout)) | |
269 | return -IPSET_ERR_TIMEOUT; | |
270 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
271 | } | |
272 | ||
2a7cef2a JK |
273 | if (tb[IPSET_ATTR_CADT_FLAGS] && adt == IPSET_ADD) { |
274 | u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); | |
275 | if (cadt_flags & IPSET_FLAG_NOMATCH) | |
276 | flags |= (cadt_flags << 16); | |
277 | } | |
278 | ||
d0d9e0a5 | 279 | with_ports = with_ports && tb[IPSET_ATTR_PORT_TO]; |
41d22f7b | 280 | if (adt == IPSET_TEST || |
d0d9e0a5 JK |
281 | !(tb[IPSET_ATTR_CIDR] || tb[IPSET_ATTR_IP_TO] || with_ports || |
282 | tb[IPSET_ATTR_IP2_TO])) { | |
283 | data.ip = htonl(ip); | |
2a7cef2a | 284 | data.ip2 = htonl(ip2_from & ip_set_hostmask(data.cidr + 1)); |
5416219e | 285 | ret = adtfn(set, &data, timeout, flags); |
41d22f7b JK |
286 | return ip_set_eexist(ret, flags) ? 0 : ret; |
287 | } | |
288 | ||
4fe198e6 | 289 | ip_to = ip; |
41d22f7b JK |
290 | if (tb[IPSET_ATTR_IP_TO]) { |
291 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to); | |
292 | if (ret) | |
293 | return ret; | |
294 | if (ip > ip_to) | |
295 | swap(ip, ip_to); | |
296 | } else if (tb[IPSET_ATTR_CIDR]) { | |
297 | u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); | |
298 | ||
b9fed748 | 299 | if (!cidr || cidr > 32) |
41d22f7b | 300 | return -IPSET_ERR_INVALID_CIDR; |
e6146e86 | 301 | ip_set_mask_from_to(ip, ip_to, cidr); |
d0d9e0a5 | 302 | } |
41d22f7b | 303 | |
5e0c1eb7 | 304 | port_to = port = ntohs(data.port); |
d0d9e0a5 | 305 | if (tb[IPSET_ATTR_PORT_TO]) { |
41d22f7b JK |
306 | port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]); |
307 | if (port > port_to) | |
308 | swap(port, port_to); | |
5e0c1eb7 | 309 | } |
4fe198e6 JK |
310 | |
311 | ip2_to = ip2_from; | |
d0d9e0a5 JK |
312 | if (tb[IPSET_ATTR_IP2_TO]) { |
313 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to); | |
314 | if (ret) | |
315 | return ret; | |
316 | if (ip2_from > ip2_to) | |
317 | swap(ip2_from, ip2_to); | |
318 | if (ip2_from + UINT_MAX == ip2_to) | |
319 | return -IPSET_ERR_HASH_RANGE; | |
320 | } else { | |
2a7cef2a | 321 | ip_set_mask_from_to(ip2_from, ip2_to, data.cidr + 1); |
d0d9e0a5 | 322 | } |
41d22f7b | 323 | |
3d14b171 | 324 | if (retried) |
6e27c9b4 | 325 | ip = ntohl(h->next.ip); |
3d14b171 | 326 | for (; !before(ip_to, ip); ip++) { |
d0d9e0a5 | 327 | data.ip = htonl(ip); |
6e27c9b4 JK |
328 | p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port) |
329 | : port; | |
3d14b171 | 330 | for (; p <= port_to; p++) { |
41d22f7b | 331 | data.port = htons(p); |
6e27c9b4 JK |
332 | ip2 = retried |
333 | && ip == ntohl(h->next.ip) | |
334 | && p == ntohs(h->next.port) | |
335 | ? ntohl(h->next.ip2) : ip2_from; | |
d0d9e0a5 JK |
336 | while (!after(ip2, ip2_to)) { |
337 | data.ip2 = htonl(ip2); | |
338 | ip2_last = ip_set_range_to_cidr(ip2, ip2_to, | |
2a7cef2a JK |
339 | &cidr); |
340 | data.cidr = cidr - 1; | |
d0d9e0a5 JK |
341 | ret = adtfn(set, &data, timeout, flags); |
342 | ||
343 | if (ret && !ip_set_eexist(ret, flags)) | |
344 | return ret; | |
345 | else | |
346 | ret = 0; | |
347 | ip2 = ip2_last + 1; | |
348 | } | |
41d22f7b | 349 | } |
3d14b171 | 350 | } |
41d22f7b JK |
351 | return ret; |
352 | } | |
353 | ||
354 | static bool | |
355 | hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b) | |
356 | { | |
357 | const struct ip_set_hash *x = a->data; | |
358 | const struct ip_set_hash *y = b->data; | |
359 | ||
360 | /* Resizing changes htable_bits, so we ignore it */ | |
361 | return x->maxelem == y->maxelem && | |
362 | x->timeout == y->timeout; | |
363 | } | |
364 | ||
365 | /* The type variant functions: IPv6 */ | |
366 | ||
367 | struct hash_ipportnet6_elem { | |
368 | union nf_inet_addr ip; | |
369 | union nf_inet_addr ip2; | |
370 | __be16 port; | |
2a7cef2a JK |
371 | u8 cidr:7; |
372 | u8 nomatch:1; | |
41d22f7b JK |
373 | u8 proto; |
374 | }; | |
375 | ||
376 | struct hash_ipportnet6_telem { | |
377 | union nf_inet_addr ip; | |
378 | union nf_inet_addr ip2; | |
379 | __be16 port; | |
2a7cef2a JK |
380 | u8 cidr:7; |
381 | u8 nomatch:1; | |
41d22f7b JK |
382 | u8 proto; |
383 | unsigned long timeout; | |
384 | }; | |
385 | ||
386 | static inline bool | |
387 | hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1, | |
89dc79b7 JK |
388 | const struct hash_ipportnet6_elem *ip2, |
389 | u32 *multi) | |
41d22f7b JK |
390 | { |
391 | return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 && | |
392 | ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 && | |
393 | ip1->cidr == ip2->cidr && | |
394 | ip1->port == ip2->port && | |
395 | ip1->proto == ip2->proto; | |
396 | } | |
397 | ||
398 | static inline bool | |
399 | hash_ipportnet6_data_isnull(const struct hash_ipportnet6_elem *elem) | |
400 | { | |
401 | return elem->proto == 0; | |
402 | } | |
403 | ||
404 | static inline void | |
405 | hash_ipportnet6_data_copy(struct hash_ipportnet6_elem *dst, | |
406 | const struct hash_ipportnet6_elem *src) | |
407 | { | |
408 | memcpy(dst, src, sizeof(*dst)); | |
409 | } | |
410 | ||
2a7cef2a JK |
411 | static inline void |
412 | hash_ipportnet6_data_flags(struct hash_ipportnet6_elem *dst, u32 flags) | |
413 | { | |
414 | dst->nomatch = !!(flags & IPSET_FLAG_NOMATCH); | |
415 | } | |
416 | ||
3e0304a5 | 417 | static inline int |
2a7cef2a JK |
418 | hash_ipportnet6_data_match(const struct hash_ipportnet6_elem *elem) |
419 | { | |
3e0304a5 | 420 | return elem->nomatch ? -ENOTEMPTY : 1; |
2a7cef2a JK |
421 | } |
422 | ||
41d22f7b JK |
423 | static inline void |
424 | hash_ipportnet6_data_zero_out(struct hash_ipportnet6_elem *elem) | |
425 | { | |
426 | elem->proto = 0; | |
427 | } | |
428 | ||
429 | static inline void | |
430 | ip6_netmask(union nf_inet_addr *ip, u8 prefix) | |
431 | { | |
432 | ip->ip6[0] &= ip_set_netmask6(prefix)[0]; | |
433 | ip->ip6[1] &= ip_set_netmask6(prefix)[1]; | |
434 | ip->ip6[2] &= ip_set_netmask6(prefix)[2]; | |
435 | ip->ip6[3] &= ip_set_netmask6(prefix)[3]; | |
436 | } | |
437 | ||
438 | static inline void | |
439 | hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr) | |
440 | { | |
441 | ip6_netmask(&elem->ip2, cidr); | |
2a7cef2a | 442 | elem->cidr = cidr - 1; |
41d22f7b JK |
443 | } |
444 | ||
445 | static bool | |
446 | hash_ipportnet6_data_list(struct sk_buff *skb, | |
447 | const struct hash_ipportnet6_elem *data) | |
448 | { | |
2a7cef2a JK |
449 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
450 | ||
7cf7899d DM |
451 | if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) || |
452 | nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) || | |
453 | nla_put_net16(skb, IPSET_ATTR_PORT, data->port) || | |
454 | nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) || | |
455 | nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) || | |
456 | (flags && | |
457 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) | |
458 | goto nla_put_failure; | |
41d22f7b JK |
459 | return 0; |
460 | ||
461 | nla_put_failure: | |
462 | return 1; | |
463 | } | |
464 | ||
465 | static bool | |
466 | hash_ipportnet6_data_tlist(struct sk_buff *skb, | |
467 | const struct hash_ipportnet6_elem *data) | |
468 | { | |
469 | const struct hash_ipportnet6_telem *e = | |
470 | (const struct hash_ipportnet6_telem *)data; | |
2a7cef2a | 471 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
41d22f7b | 472 | |
7cf7899d DM |
473 | if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) || |
474 | nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) || | |
475 | nla_put_net16(skb, IPSET_ATTR_PORT, data->port) || | |
476 | nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) || | |
477 | nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) || | |
478 | nla_put_net32(skb, IPSET_ATTR_TIMEOUT, | |
479 | htonl(ip_set_timeout_get(e->timeout))) || | |
480 | (flags && | |
481 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) | |
482 | goto nla_put_failure; | |
41d22f7b JK |
483 | return 0; |
484 | ||
485 | nla_put_failure: | |
486 | return 1; | |
487 | } | |
488 | ||
489 | #undef PF | |
490 | #undef HOST_MASK | |
491 | ||
492 | #define PF 6 | |
493 | #define HOST_MASK 128 | |
494 | #include <linux/netfilter/ipset/ip_set_ahash.h> | |
495 | ||
3d14b171 JK |
496 | static inline void |
497 | hash_ipportnet6_data_next(struct ip_set_hash *h, | |
498 | const struct hash_ipportnet6_elem *d) | |
499 | { | |
6e27c9b4 | 500 | h->next.port = d->port; |
3d14b171 JK |
501 | } |
502 | ||
41d22f7b JK |
503 | static int |
504 | hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb, | |
b66554cf | 505 | const struct xt_action_param *par, |
ac8cc925 | 506 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
41d22f7b JK |
507 | { |
508 | const struct ip_set_hash *h = set->data; | |
509 | ipset_adtfn adtfn = set->variant->adt[adt]; | |
9b03a5ef | 510 | struct hash_ipportnet6_elem data = { |
2a7cef2a | 511 | .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1 |
9b03a5ef | 512 | }; |
41d22f7b | 513 | |
41d22f7b | 514 | if (adt == IPSET_TEST) |
2a7cef2a | 515 | data.cidr = HOST_MASK - 1; |
41d22f7b | 516 | |
ac8cc925 | 517 | if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC, |
41d22f7b JK |
518 | &data.port, &data.proto)) |
519 | return -EINVAL; | |
520 | ||
ac8cc925 JK |
521 | ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6); |
522 | ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2.in6); | |
2a7cef2a | 523 | ip6_netmask(&data.ip2, data.cidr + 1); |
41d22f7b | 524 | |
ac8cc925 | 525 | return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags); |
41d22f7b JK |
526 | } |
527 | ||
528 | static int | |
529 | hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[], | |
3d14b171 | 530 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
41d22f7b JK |
531 | { |
532 | const struct ip_set_hash *h = set->data; | |
533 | ipset_adtfn adtfn = set->variant->adt[adt]; | |
2a7cef2a | 534 | struct hash_ipportnet6_elem data = { .cidr = HOST_MASK - 1 }; |
41d22f7b JK |
535 | u32 port, port_to; |
536 | u32 timeout = h->timeout; | |
5e0c1eb7 | 537 | bool with_ports = false; |
2a7cef2a | 538 | u8 cidr; |
41d22f7b JK |
539 | int ret; |
540 | ||
541 | if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] || | |
542 | !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) || | |
543 | !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) || | |
544 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || | |
2a7cef2a | 545 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) || |
41d22f7b JK |
546 | tb[IPSET_ATTR_IP_TO] || |
547 | tb[IPSET_ATTR_CIDR])) | |
548 | return -IPSET_ERR_PROTOCOL; | |
d0d9e0a5 JK |
549 | if (unlikely(tb[IPSET_ATTR_IP_TO])) |
550 | return -IPSET_ERR_HASH_RANGE_UNSUPPORTED; | |
41d22f7b JK |
551 | |
552 | if (tb[IPSET_ATTR_LINENO]) | |
553 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); | |
554 | ||
555 | ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip); | |
556 | if (ret) | |
557 | return ret; | |
558 | ||
559 | ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2); | |
560 | if (ret) | |
561 | return ret; | |
562 | ||
2a7cef2a JK |
563 | if (tb[IPSET_ATTR_CIDR2]) { |
564 | cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]); | |
565 | if (!cidr || cidr > HOST_MASK) | |
566 | return -IPSET_ERR_INVALID_CIDR; | |
567 | data.cidr = cidr - 1; | |
568 | } | |
41d22f7b | 569 | |
2a7cef2a | 570 | ip6_netmask(&data.ip2, data.cidr + 1); |
41d22f7b JK |
571 | |
572 | if (tb[IPSET_ATTR_PORT]) | |
573 | data.port = nla_get_be16(tb[IPSET_ATTR_PORT]); | |
574 | else | |
575 | return -IPSET_ERR_PROTOCOL; | |
576 | ||
577 | if (tb[IPSET_ATTR_PROTO]) { | |
578 | data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]); | |
5e0c1eb7 | 579 | with_ports = ip_set_proto_with_ports(data.proto); |
41d22f7b JK |
580 | |
581 | if (data.proto == 0) | |
582 | return -IPSET_ERR_INVALID_PROTO; | |
583 | } else | |
584 | return -IPSET_ERR_MISSING_PROTO; | |
585 | ||
5e0c1eb7 | 586 | if (!(with_ports || data.proto == IPPROTO_ICMPV6)) |
41d22f7b | 587 | data.port = 0; |
41d22f7b JK |
588 | |
589 | if (tb[IPSET_ATTR_TIMEOUT]) { | |
590 | if (!with_timeout(h->timeout)) | |
591 | return -IPSET_ERR_TIMEOUT; | |
592 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
593 | } | |
594 | ||
2a7cef2a JK |
595 | if (tb[IPSET_ATTR_CADT_FLAGS] && adt == IPSET_ADD) { |
596 | u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); | |
597 | if (cadt_flags & IPSET_FLAG_NOMATCH) | |
598 | flags |= (cadt_flags << 16); | |
599 | } | |
600 | ||
5e0c1eb7 | 601 | if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) { |
5416219e | 602 | ret = adtfn(set, &data, timeout, flags); |
41d22f7b JK |
603 | return ip_set_eexist(ret, flags) ? 0 : ret; |
604 | } | |
605 | ||
606 | port = ntohs(data.port); | |
607 | port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]); | |
608 | if (port > port_to) | |
609 | swap(port, port_to); | |
610 | ||
3d14b171 | 611 | if (retried) |
6e27c9b4 | 612 | port = ntohs(h->next.port); |
41d22f7b JK |
613 | for (; port <= port_to; port++) { |
614 | data.port = htons(port); | |
5416219e | 615 | ret = adtfn(set, &data, timeout, flags); |
41d22f7b JK |
616 | |
617 | if (ret && !ip_set_eexist(ret, flags)) | |
618 | return ret; | |
619 | else | |
620 | ret = 0; | |
621 | } | |
622 | return ret; | |
623 | } | |
624 | ||
625 | /* Create hash:ip type of sets */ | |
626 | ||
627 | static int | |
628 | hash_ipportnet_create(struct ip_set *set, struct nlattr *tb[], u32 flags) | |
629 | { | |
630 | struct ip_set_hash *h; | |
631 | u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM; | |
632 | u8 hbits; | |
26a5d3cc | 633 | size_t hsize; |
41d22f7b | 634 | |
c15f1c83 | 635 | if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6)) |
41d22f7b JK |
636 | return -IPSET_ERR_INVALID_FAMILY; |
637 | ||
638 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) || | |
639 | !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) || | |
640 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) | |
641 | return -IPSET_ERR_PROTOCOL; | |
642 | ||
643 | if (tb[IPSET_ATTR_HASHSIZE]) { | |
644 | hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]); | |
645 | if (hashsize < IPSET_MIMINAL_HASHSIZE) | |
646 | hashsize = IPSET_MIMINAL_HASHSIZE; | |
647 | } | |
648 | ||
649 | if (tb[IPSET_ATTR_MAXELEM]) | |
650 | maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]); | |
651 | ||
652 | h = kzalloc(sizeof(*h) | |
653 | + sizeof(struct ip_set_hash_nets) | |
c15f1c83 | 654 | * (set->family == NFPROTO_IPV4 ? 32 : 128), GFP_KERNEL); |
41d22f7b JK |
655 | if (!h) |
656 | return -ENOMEM; | |
657 | ||
658 | h->maxelem = maxelem; | |
659 | get_random_bytes(&h->initval, sizeof(h->initval)); | |
660 | h->timeout = IPSET_NO_TIMEOUT; | |
661 | ||
662 | hbits = htable_bits(hashsize); | |
26a5d3cc JK |
663 | hsize = htable_size(hbits); |
664 | if (hsize == 0) { | |
665 | kfree(h); | |
666 | return -ENOMEM; | |
667 | } | |
668 | h->table = ip_set_alloc(hsize); | |
41d22f7b JK |
669 | if (!h->table) { |
670 | kfree(h); | |
671 | return -ENOMEM; | |
672 | } | |
673 | h->table->htable_bits = hbits; | |
674 | ||
675 | set->data = h; | |
676 | ||
677 | if (tb[IPSET_ATTR_TIMEOUT]) { | |
678 | h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
679 | ||
c15f1c83 | 680 | set->variant = set->family == NFPROTO_IPV4 |
41d22f7b JK |
681 | ? &hash_ipportnet4_tvariant |
682 | : &hash_ipportnet6_tvariant; | |
683 | ||
c15f1c83 | 684 | if (set->family == NFPROTO_IPV4) |
41d22f7b JK |
685 | hash_ipportnet4_gc_init(set); |
686 | else | |
687 | hash_ipportnet6_gc_init(set); | |
688 | } else { | |
c15f1c83 | 689 | set->variant = set->family == NFPROTO_IPV4 |
41d22f7b JK |
690 | ? &hash_ipportnet4_variant : &hash_ipportnet6_variant; |
691 | } | |
692 | ||
693 | pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n", | |
694 | set->name, jhash_size(h->table->htable_bits), | |
695 | h->table->htable_bits, h->maxelem, set->data, h->table); | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static struct ip_set_type hash_ipportnet_type __read_mostly = { | |
701 | .name = "hash:ip,port,net", | |
702 | .protocol = IPSET_PROTOCOL, | |
3e0304a5 JK |
703 | .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2 | |
704 | IPSET_TYPE_NOMATCH, | |
41d22f7b | 705 | .dimension = IPSET_DIM_THREE, |
c15f1c83 | 706 | .family = NFPROTO_UNSPEC, |
10111a6e JK |
707 | .revision_min = REVISION_MIN, |
708 | .revision_max = REVISION_MAX, | |
41d22f7b JK |
709 | .create = hash_ipportnet_create, |
710 | .create_policy = { | |
711 | [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 }, | |
712 | [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 }, | |
713 | [IPSET_ATTR_PROBES] = { .type = NLA_U8 }, | |
714 | [IPSET_ATTR_RESIZE] = { .type = NLA_U8 }, | |
715 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
716 | }, | |
717 | .adt_policy = { | |
718 | [IPSET_ATTR_IP] = { .type = NLA_NESTED }, | |
719 | [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED }, | |
720 | [IPSET_ATTR_IP2] = { .type = NLA_NESTED }, | |
d0d9e0a5 | 721 | [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED }, |
41d22f7b JK |
722 | [IPSET_ATTR_PORT] = { .type = NLA_U16 }, |
723 | [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 }, | |
724 | [IPSET_ATTR_CIDR] = { .type = NLA_U8 }, | |
725 | [IPSET_ATTR_CIDR2] = { .type = NLA_U8 }, | |
726 | [IPSET_ATTR_PROTO] = { .type = NLA_U8 }, | |
2a7cef2a | 727 | [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, |
41d22f7b JK |
728 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
729 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, | |
730 | }, | |
731 | .me = THIS_MODULE, | |
732 | }; | |
733 | ||
734 | static int __init | |
735 | hash_ipportnet_init(void) | |
736 | { | |
737 | return ip_set_type_register(&hash_ipportnet_type); | |
738 | } | |
739 | ||
740 | static void __exit | |
741 | hash_ipportnet_fini(void) | |
742 | { | |
743 | ip_set_type_unregister(&hash_ipportnet_type); | |
744 | } | |
745 | ||
746 | module_init(hash_ipportnet_init); | |
747 | module_exit(hash_ipportnet_fini); |