1 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org>
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>
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 /*				1    SCTP and UDPLITE support added */
29 /*				2    Range as input support for IPv4 added */
30 /*				3    nomatch flag support added */
31 /*				4    Counters support added */
32 /*				5    Comments support added */
33 /*				6    Forceadd support added */
34 #define IPSET_TYPE_REV_MAX	7 /* skbinfo support added */
35 
36 MODULE_LICENSE("GPL");
37 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
38 IP_SET_MODULE_DESC("hash:ip,port,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
39 MODULE_ALIAS("ip_set_hash:ip,port,net");
40 
41 /* Type specific function prefix */
42 #define HTYPE		hash_ipportnet
43 
44 /* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0
45  * However this way we have to store internally cidr - 1,
46  * dancing back and forth.
47  */
48 #define IP_SET_HASH_WITH_NETS_PACKED
49 #define IP_SET_HASH_WITH_PROTO
50 #define IP_SET_HASH_WITH_NETS
51 
52 /* IPv4 variant */
53 
54 /* Member elements */
55 struct hash_ipportnet4_elem {
56 	__be32 ip;
57 	__be32 ip2;
58 	__be16 port;
59 	u8 cidr:7;
60 	u8 nomatch:1;
61 	u8 proto;
62 };
63 
64 /* Common functions */
65 
66 static inline bool
67 hash_ipportnet4_data_equal(const struct hash_ipportnet4_elem *ip1,
68 			   const struct hash_ipportnet4_elem *ip2,
69 			   u32 *multi)
70 {
71 	return ip1->ip == ip2->ip &&
72 	       ip1->ip2 == ip2->ip2 &&
73 	       ip1->cidr == ip2->cidr &&
74 	       ip1->port == ip2->port &&
75 	       ip1->proto == ip2->proto;
76 }
77 
78 static inline int
79 hash_ipportnet4_do_data_match(const struct hash_ipportnet4_elem *elem)
80 {
81 	return elem->nomatch ? -ENOTEMPTY : 1;
82 }
83 
84 static inline void
85 hash_ipportnet4_data_set_flags(struct hash_ipportnet4_elem *elem, u32 flags)
86 {
87 	elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
88 }
89 
90 static inline void
91 hash_ipportnet4_data_reset_flags(struct hash_ipportnet4_elem *elem, u8 *flags)
92 {
93 	swap(*flags, elem->nomatch);
94 }
95 
96 static inline void
97 hash_ipportnet4_data_netmask(struct hash_ipportnet4_elem *elem, u8 cidr)
98 {
99 	elem->ip2 &= ip_set_netmask(cidr);
100 	elem->cidr = cidr - 1;
101 }
102 
103 static bool
104 hash_ipportnet4_data_list(struct sk_buff *skb,
105 			  const struct hash_ipportnet4_elem *data)
106 {
107 	u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
108 
109 	if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
110 	    nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip2) ||
111 	    nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
112 	    nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) ||
113 	    nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
114 	    (flags &&
115 	     nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
116 		goto nla_put_failure;
117 	return false;
118 
119 nla_put_failure:
120 	return true;
121 }
122 
123 static inline void
124 hash_ipportnet4_data_next(struct hash_ipportnet4_elem *next,
125 			  const struct hash_ipportnet4_elem *d)
126 {
127 	next->ip = d->ip;
128 	next->port = d->port;
129 	next->ip2 = d->ip2;
130 }
131 
132 #define MTYPE		hash_ipportnet4
133 #define HOST_MASK	32
134 #include "ip_set_hash_gen.h"
135 
136 static int
137 hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
138 		     const struct xt_action_param *par,
139 		     enum ipset_adt adt, struct ip_set_adt_opt *opt)
140 {
141 	const struct hash_ipportnet4 *h = set->data;
142 	ipset_adtfn adtfn = set->variant->adt[adt];
143 	struct hash_ipportnet4_elem e = {
144 		.cidr = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
145 	};
146 	struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
147 
148 	if (adt == IPSET_TEST)
149 		e.cidr = HOST_MASK - 1;
150 
151 	if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
152 				 &e.port, &e.proto))
153 		return -EINVAL;
154 
155 	ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
156 	ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2);
157 	e.ip2 &= ip_set_netmask(e.cidr + 1);
158 
159 	return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
160 }
161 
162 static int
163 hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
164 		     enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
165 {
166 	const struct hash_ipportnet4 *h = set->data;
167 	ipset_adtfn adtfn = set->variant->adt[adt];
168 	struct hash_ipportnet4_elem e = { .cidr = HOST_MASK - 1 };
169 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
170 	u32 ip = 0, ip_to = 0, p = 0, port, port_to;
171 	u32 ip2_from = 0, ip2_to = 0, ip2;
172 	bool with_ports = false;
173 	u8 cidr;
174 	int ret;
175 
176 	if (tb[IPSET_ATTR_LINENO])
177 		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
178 
179 	if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
180 		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
181 		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
182 		     !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
183 		return -IPSET_ERR_PROTOCOL;
184 
185 	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
186 	if (ret)
187 		return ret;
188 
189 	ret = ip_set_get_extensions(set, tb, &ext);
190 	if (ret)
191 		return ret;
192 
193 	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
194 	if (ret)
195 		return ret;
196 
197 	if (tb[IPSET_ATTR_CIDR2]) {
198 		cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
199 		if (!cidr || cidr > HOST_MASK)
200 			return -IPSET_ERR_INVALID_CIDR;
201 		e.cidr = cidr - 1;
202 	}
203 
204 	e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
205 
206 	if (tb[IPSET_ATTR_PROTO]) {
207 		e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
208 		with_ports = ip_set_proto_with_ports(e.proto);
209 
210 		if (e.proto == 0)
211 			return -IPSET_ERR_INVALID_PROTO;
212 	} else {
213 		return -IPSET_ERR_MISSING_PROTO;
214 	}
215 
216 	if (!(with_ports || e.proto == IPPROTO_ICMP))
217 		e.port = 0;
218 
219 	if (tb[IPSET_ATTR_CADT_FLAGS]) {
220 		u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
221 
222 		if (cadt_flags & IPSET_FLAG_NOMATCH)
223 			flags |= (IPSET_FLAG_NOMATCH << 16);
224 	}
225 
226 	with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
227 	if (adt == IPSET_TEST ||
228 	    !(tb[IPSET_ATTR_CIDR] || tb[IPSET_ATTR_IP_TO] || with_ports ||
229 	      tb[IPSET_ATTR_IP2_TO])) {
230 		e.ip = htonl(ip);
231 		e.ip2 = htonl(ip2_from & ip_set_hostmask(e.cidr + 1));
232 		ret = adtfn(set, &e, &ext, &ext, flags);
233 		return ip_set_enomatch(ret, flags, adt, set) ? -ret :
234 		       ip_set_eexist(ret, flags) ? 0 : ret;
235 	}
236 
237 	ip_to = ip;
238 	if (tb[IPSET_ATTR_IP_TO]) {
239 		ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
240 		if (ret)
241 			return ret;
242 		if (ip > ip_to)
243 			swap(ip, ip_to);
244 	} else if (tb[IPSET_ATTR_CIDR]) {
245 		cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
246 
247 		if (!cidr || cidr > HOST_MASK)
248 			return -IPSET_ERR_INVALID_CIDR;
249 		ip_set_mask_from_to(ip, ip_to, cidr);
250 	}
251 
252 	port_to = port = ntohs(e.port);
253 	if (tb[IPSET_ATTR_PORT_TO]) {
254 		port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
255 		if (port > port_to)
256 			swap(port, port_to);
257 	}
258 
259 	ip2_to = ip2_from;
260 	if (tb[IPSET_ATTR_IP2_TO]) {
261 		ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
262 		if (ret)
263 			return ret;
264 		if (ip2_from > ip2_to)
265 			swap(ip2_from, ip2_to);
266 		if (ip2_from + UINT_MAX == ip2_to)
267 			return -IPSET_ERR_HASH_RANGE;
268 	} else {
269 		ip_set_mask_from_to(ip2_from, ip2_to, e.cidr + 1);
270 	}
271 
272 	if (retried) {
273 		ip = ntohl(h->next.ip);
274 		p = ntohs(h->next.port);
275 		ip2 = ntohl(h->next.ip2);
276 	} else {
277 		p = port;
278 		ip2 = ip2_from;
279 	}
280 	for (; ip <= ip_to; ip++) {
281 		e.ip = htonl(ip);
282 		for (; p <= port_to; p++) {
283 			e.port = htons(p);
284 			do {
285 				e.ip2 = htonl(ip2);
286 				ip2 = ip_set_range_to_cidr(ip2, ip2_to, &cidr);
287 				e.cidr = cidr - 1;
288 				ret = adtfn(set, &e, &ext, &ext, flags);
289 
290 				if (ret && !ip_set_eexist(ret, flags))
291 					return ret;
292 
293 				ret = 0;
294 			} while (ip2++ < ip2_to);
295 			ip2 = ip2_from;
296 		}
297 		p = port;
298 	}
299 	return ret;
300 }
301 
302 /* IPv6 variant */
303 
304 struct hash_ipportnet6_elem {
305 	union nf_inet_addr ip;
306 	union nf_inet_addr ip2;
307 	__be16 port;
308 	u8 cidr:7;
309 	u8 nomatch:1;
310 	u8 proto;
311 };
312 
313 /* Common functions */
314 
315 static inline bool
316 hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1,
317 			   const struct hash_ipportnet6_elem *ip2,
318 			   u32 *multi)
319 {
320 	return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
321 	       ipv6_addr_equal(&ip1->ip2.in6, &ip2->ip2.in6) &&
322 	       ip1->cidr == ip2->cidr &&
323 	       ip1->port == ip2->port &&
324 	       ip1->proto == ip2->proto;
325 }
326 
327 static inline int
328 hash_ipportnet6_do_data_match(const struct hash_ipportnet6_elem *elem)
329 {
330 	return elem->nomatch ? -ENOTEMPTY : 1;
331 }
332 
333 static inline void
334 hash_ipportnet6_data_set_flags(struct hash_ipportnet6_elem *elem, u32 flags)
335 {
336 	elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
337 }
338 
339 static inline void
340 hash_ipportnet6_data_reset_flags(struct hash_ipportnet6_elem *elem, u8 *flags)
341 {
342 	swap(*flags, elem->nomatch);
343 }
344 
345 static inline void
346 hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr)
347 {
348 	ip6_netmask(&elem->ip2, cidr);
349 	elem->cidr = cidr - 1;
350 }
351 
352 static bool
353 hash_ipportnet6_data_list(struct sk_buff *skb,
354 			  const struct hash_ipportnet6_elem *data)
355 {
356 	u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
357 
358 	if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
359 	    nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) ||
360 	    nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
361 	    nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) ||
362 	    nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
363 	    (flags &&
364 	     nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
365 		goto nla_put_failure;
366 	return false;
367 
368 nla_put_failure:
369 	return true;
370 }
371 
372 static inline void
373 hash_ipportnet6_data_next(struct hash_ipportnet6_elem *next,
374 			  const struct hash_ipportnet6_elem *d)
375 {
376 	next->port = d->port;
377 }
378 
379 #undef MTYPE
380 #undef HOST_MASK
381 
382 #define MTYPE		hash_ipportnet6
383 #define HOST_MASK	128
384 #define IP_SET_EMIT_CREATE
385 #include "ip_set_hash_gen.h"
386 
387 static int
388 hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
389 		     const struct xt_action_param *par,
390 		     enum ipset_adt adt, struct ip_set_adt_opt *opt)
391 {
392 	const struct hash_ipportnet6 *h = set->data;
393 	ipset_adtfn adtfn = set->variant->adt[adt];
394 	struct hash_ipportnet6_elem e = {
395 		.cidr = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
396 	};
397 	struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
398 
399 	if (adt == IPSET_TEST)
400 		e.cidr = HOST_MASK - 1;
401 
402 	if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
403 				 &e.port, &e.proto))
404 		return -EINVAL;
405 
406 	ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
407 	ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2.in6);
408 	ip6_netmask(&e.ip2, e.cidr + 1);
409 
410 	return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
411 }
412 
413 static int
414 hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
415 		     enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
416 {
417 	const struct hash_ipportnet6 *h = set->data;
418 	ipset_adtfn adtfn = set->variant->adt[adt];
419 	struct hash_ipportnet6_elem e = { .cidr = HOST_MASK - 1 };
420 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
421 	u32 port, port_to;
422 	bool with_ports = false;
423 	u8 cidr;
424 	int ret;
425 
426 	if (tb[IPSET_ATTR_LINENO])
427 		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
428 
429 	if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
430 		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
431 		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
432 		     !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
433 		return -IPSET_ERR_PROTOCOL;
434 	if (unlikely(tb[IPSET_ATTR_IP_TO]))
435 		return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
436 	if (unlikely(tb[IPSET_ATTR_CIDR])) {
437 		cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
438 
439 		if (cidr != HOST_MASK)
440 			return -IPSET_ERR_INVALID_CIDR;
441 	}
442 
443 	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
444 	if (ret)
445 		return ret;
446 
447 	ret = ip_set_get_extensions(set, tb, &ext);
448 	if (ret)
449 		return ret;
450 
451 	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip2);
452 	if (ret)
453 		return ret;
454 
455 	if (tb[IPSET_ATTR_CIDR2]) {
456 		cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
457 		if (!cidr || cidr > HOST_MASK)
458 			return -IPSET_ERR_INVALID_CIDR;
459 		e.cidr = cidr - 1;
460 	}
461 
462 	ip6_netmask(&e.ip2, e.cidr + 1);
463 
464 	e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
465 
466 	if (tb[IPSET_ATTR_PROTO]) {
467 		e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
468 		with_ports = ip_set_proto_with_ports(e.proto);
469 
470 		if (e.proto == 0)
471 			return -IPSET_ERR_INVALID_PROTO;
472 	} else {
473 		return -IPSET_ERR_MISSING_PROTO;
474 	}
475 
476 	if (!(with_ports || e.proto == IPPROTO_ICMPV6))
477 		e.port = 0;
478 
479 	if (tb[IPSET_ATTR_CADT_FLAGS]) {
480 		u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
481 
482 		if (cadt_flags & IPSET_FLAG_NOMATCH)
483 			flags |= (IPSET_FLAG_NOMATCH << 16);
484 	}
485 
486 	if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
487 		ret = adtfn(set, &e, &ext, &ext, flags);
488 		return ip_set_enomatch(ret, flags, adt, set) ? -ret :
489 		       ip_set_eexist(ret, flags) ? 0 : ret;
490 	}
491 
492 	port = ntohs(e.port);
493 	port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
494 	if (port > port_to)
495 		swap(port, port_to);
496 
497 	if (retried)
498 		port = ntohs(h->next.port);
499 	for (; port <= port_to; port++) {
500 		e.port = htons(port);
501 		ret = adtfn(set, &e, &ext, &ext, flags);
502 
503 		if (ret && !ip_set_eexist(ret, flags))
504 			return ret;
505 
506 		ret = 0;
507 	}
508 	return ret;
509 }
510 
511 static struct ip_set_type hash_ipportnet_type __read_mostly = {
512 	.name		= "hash:ip,port,net",
513 	.protocol	= IPSET_PROTOCOL,
514 	.features	= IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2 |
515 			  IPSET_TYPE_NOMATCH,
516 	.dimension	= IPSET_DIM_THREE,
517 	.family		= NFPROTO_UNSPEC,
518 	.revision_min	= IPSET_TYPE_REV_MIN,
519 	.revision_max	= IPSET_TYPE_REV_MAX,
520 	.create		= hash_ipportnet_create,
521 	.create_policy	= {
522 		[IPSET_ATTR_HASHSIZE]	= { .type = NLA_U32 },
523 		[IPSET_ATTR_MAXELEM]	= { .type = NLA_U32 },
524 		[IPSET_ATTR_PROBES]	= { .type = NLA_U8 },
525 		[IPSET_ATTR_RESIZE]	= { .type = NLA_U8  },
526 		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
527 		[IPSET_ATTR_CADT_FLAGS]	= { .type = NLA_U32 },
528 	},
529 	.adt_policy	= {
530 		[IPSET_ATTR_IP]		= { .type = NLA_NESTED },
531 		[IPSET_ATTR_IP_TO]	= { .type = NLA_NESTED },
532 		[IPSET_ATTR_IP2]	= { .type = NLA_NESTED },
533 		[IPSET_ATTR_IP2_TO]	= { .type = NLA_NESTED },
534 		[IPSET_ATTR_PORT]	= { .type = NLA_U16 },
535 		[IPSET_ATTR_PORT_TO]	= { .type = NLA_U16 },
536 		[IPSET_ATTR_CIDR]	= { .type = NLA_U8 },
537 		[IPSET_ATTR_CIDR2]	= { .type = NLA_U8 },
538 		[IPSET_ATTR_PROTO]	= { .type = NLA_U8 },
539 		[IPSET_ATTR_CADT_FLAGS]	= { .type = NLA_U32 },
540 		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
541 		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
542 		[IPSET_ATTR_BYTES]	= { .type = NLA_U64 },
543 		[IPSET_ATTR_PACKETS]	= { .type = NLA_U64 },
544 		[IPSET_ATTR_COMMENT]	= { .type = NLA_NUL_STRING,
545 					    .len  = IPSET_MAX_COMMENT_SIZE },
546 		[IPSET_ATTR_SKBMARK]	= { .type = NLA_U64 },
547 		[IPSET_ATTR_SKBPRIO]	= { .type = NLA_U32 },
548 		[IPSET_ATTR_SKBQUEUE]	= { .type = NLA_U16 },
549 	},
550 	.me		= THIS_MODULE,
551 };
552 
553 static int __init
554 hash_ipportnet_init(void)
555 {
556 	return ip_set_type_register(&hash_ipportnet_type);
557 }
558 
559 static void __exit
560 hash_ipportnet_fini(void)
561 {
562 	rcu_barrier();
563 	ip_set_type_unregister(&hash_ipportnet_type);
564 }
565 
566 module_init(hash_ipportnet_init);
567 module_exit(hash_ipportnet_fini);
568