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Linux/net/netfilter/ipset/ip_set_hash_ipportnet.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org> */
  3 
  4 /* Kernel module implementing an IP set type: the hash:ip,port,net type */
  5 
  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 /*                              1    SCTP and UDPLITE support added */
 25 /*                              2    Range as input support for IPv4 added */
 26 /*                              3    nomatch flag support added */
 27 /*                              4    Counters support added */
 28 /*                              5    Comments support added */
 29 /*                              6    Forceadd support added */
 30 /*                              7    skbinfo support added */
 31 #define IPSET_TYPE_REV_MAX      8 /* bucketsize, initval support added */
 32 
 33 MODULE_LICENSE("GPL");
 34 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
 35 IP_SET_MODULE_DESC("hash:ip,port,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
 36 MODULE_ALIAS("ip_set_hash:ip,port,net");
 37 
 38 /* Type specific function prefix */
 39 #define HTYPE           hash_ipportnet
 40 
 41 /* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0
 42  * However this way we have to store internally cidr - 1,
 43  * dancing back and forth.
 44  */
 45 #define IP_SET_HASH_WITH_NETS_PACKED
 46 #define IP_SET_HASH_WITH_PROTO
 47 #define IP_SET_HASH_WITH_NETS
 48 
 49 /* IPv4 variant */
 50 
 51 /* Member elements */
 52 struct hash_ipportnet4_elem {
 53         __be32 ip;
 54         __be32 ip2;
 55         __be16 port;
 56         u8 cidr:7;
 57         u8 nomatch:1;
 58         u8 proto;
 59 };
 60 
 61 /* Common functions */
 62 
 63 static bool
 64 hash_ipportnet4_data_equal(const struct hash_ipportnet4_elem *ip1,
 65                            const struct hash_ipportnet4_elem *ip2,
 66                            u32 *multi)
 67 {
 68         return ip1->ip == ip2->ip &&
 69                ip1->ip2 == ip2->ip2 &&
 70                ip1->cidr == ip2->cidr &&
 71                ip1->port == ip2->port &&
 72                ip1->proto == ip2->proto;
 73 }
 74 
 75 static int
 76 hash_ipportnet4_do_data_match(const struct hash_ipportnet4_elem *elem)
 77 {
 78         return elem->nomatch ? -ENOTEMPTY : 1;
 79 }
 80 
 81 static void
 82 hash_ipportnet4_data_set_flags(struct hash_ipportnet4_elem *elem, u32 flags)
 83 {
 84         elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
 85 }
 86 
 87 static void
 88 hash_ipportnet4_data_reset_flags(struct hash_ipportnet4_elem *elem, u8 *flags)
 89 {
 90         swap(*flags, elem->nomatch);
 91 }
 92 
 93 static void
 94 hash_ipportnet4_data_netmask(struct hash_ipportnet4_elem *elem, u8 cidr)
 95 {
 96         elem->ip2 &= ip_set_netmask(cidr);
 97         elem->cidr = cidr - 1;
 98 }
 99 
100 static bool
101 hash_ipportnet4_data_list(struct sk_buff *skb,
102                           const struct hash_ipportnet4_elem *data)
103 {
104         u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
105 
106         if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
107             nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip2) ||
108             nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
109             nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) ||
110             nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
111             (flags &&
112              nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
113                 goto nla_put_failure;
114         return false;
115 
116 nla_put_failure:
117         return true;
118 }
119 
120 static void
121 hash_ipportnet4_data_next(struct hash_ipportnet4_elem *next,
122                           const struct hash_ipportnet4_elem *d)
123 {
124         next->ip = d->ip;
125         next->port = d->port;
126         next->ip2 = d->ip2;
127 }
128 
129 #define MTYPE           hash_ipportnet4
130 #define HOST_MASK       32
131 #include "ip_set_hash_gen.h"
132 
133 static int
134 hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
135                      const struct xt_action_param *par,
136                      enum ipset_adt adt, struct ip_set_adt_opt *opt)
137 {
138         const struct hash_ipportnet4 *h = set->data;
139         ipset_adtfn adtfn = set->variant->adt[adt];
140         struct hash_ipportnet4_elem e = {
141                 .cidr = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
142         };
143         struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
144 
145         if (adt == IPSET_TEST)
146                 e.cidr = HOST_MASK - 1;
147 
148         if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
149                                  &e.port, &e.proto))
150                 return -EINVAL;
151 
152         ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
153         ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2);
154         e.ip2 &= ip_set_netmask(e.cidr + 1);
155 
156         return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
157 }
158 
159 static int
160 hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
161                      enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
162 {
163         const struct hash_ipportnet4 *h = set->data;
164         ipset_adtfn adtfn = set->variant->adt[adt];
165         struct hash_ipportnet4_elem e = { .cidr = HOST_MASK - 1 };
166         struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
167         u32 ip = 0, ip_to = 0, p = 0, port, port_to;
168         u32 ip2_from = 0, ip2_to = 0, ip2;
169         bool with_ports = false;
170         u8 cidr;
171         int ret;
172 
173         if (tb[IPSET_ATTR_LINENO])
174                 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
175 
176         if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
177                      !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
178                      !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
179                      !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
180                 return -IPSET_ERR_PROTOCOL;
181 
182         ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
183         if (ret)
184                 return ret;
185 
186         ret = ip_set_get_extensions(set, tb, &ext);
187         if (ret)
188                 return ret;
189 
190         ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
191         if (ret)
192                 return ret;
193 
194         if (tb[IPSET_ATTR_CIDR2]) {
195                 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
196                 if (!cidr || cidr > HOST_MASK)
197                         return -IPSET_ERR_INVALID_CIDR;
198                 e.cidr = cidr - 1;
199         }
200 
201         e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
202 
203         if (tb[IPSET_ATTR_PROTO]) {
204                 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
205                 with_ports = ip_set_proto_with_ports(e.proto);
206 
207                 if (e.proto == 0)
208                         return -IPSET_ERR_INVALID_PROTO;
209         } else {
210                 return -IPSET_ERR_MISSING_PROTO;
211         }
212 
213         if (!(with_ports || e.proto == IPPROTO_ICMP))
214                 e.port = 0;
215 
216         if (tb[IPSET_ATTR_CADT_FLAGS]) {
217                 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
218 
219                 if (cadt_flags & IPSET_FLAG_NOMATCH)
220                         flags |= (IPSET_FLAG_NOMATCH << 16);
221         }
222 
223         with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
224         if (adt == IPSET_TEST ||
225             !(tb[IPSET_ATTR_CIDR] || tb[IPSET_ATTR_IP_TO] || with_ports ||
226               tb[IPSET_ATTR_IP2_TO])) {
227                 e.ip = htonl(ip);
228                 e.ip2 = htonl(ip2_from & ip_set_hostmask(e.cidr + 1));
229                 ret = adtfn(set, &e, &ext, &ext, flags);
230                 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
231                        ip_set_eexist(ret, flags) ? 0 : ret;
232         }
233 
234         ip_to = ip;
235         if (tb[IPSET_ATTR_IP_TO]) {
236                 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
237                 if (ret)
238                         return ret;
239                 if (ip > ip_to)
240                         swap(ip, ip_to);
241         } else if (tb[IPSET_ATTR_CIDR]) {
242                 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
243 
244                 if (!cidr || cidr > HOST_MASK)
245                         return -IPSET_ERR_INVALID_CIDR;
246                 ip_set_mask_from_to(ip, ip_to, cidr);
247         }
248 
249         port_to = port = ntohs(e.port);
250         if (tb[IPSET_ATTR_PORT_TO]) {
251                 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
252                 if (port > port_to)
253                         swap(port, port_to);
254         }
255 
256         ip2_to = ip2_from;
257         if (tb[IPSET_ATTR_IP2_TO]) {
258                 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
259                 if (ret)
260                         return ret;
261                 if (ip2_from > ip2_to)
262                         swap(ip2_from, ip2_to);
263                 if (ip2_from + UINT_MAX == ip2_to)
264                         return -IPSET_ERR_HASH_RANGE;
265         } else {
266                 ip_set_mask_from_to(ip2_from, ip2_to, e.cidr + 1);
267         }
268 
269         if (retried) {
270                 ip = ntohl(h->next.ip);
271                 p = ntohs(h->next.port);
272                 ip2 = ntohl(h->next.ip2);
273         } else {
274                 p = port;
275                 ip2 = ip2_from;
276         }
277         for (; ip <= ip_to; ip++) {
278                 e.ip = htonl(ip);
279                 for (; p <= port_to; p++) {
280                         e.port = htons(p);
281                         do {
282                                 e.ip2 = htonl(ip2);
283                                 ip2 = ip_set_range_to_cidr(ip2, ip2_to, &cidr);
284                                 e.cidr = cidr - 1;
285                                 ret = adtfn(set, &e, &ext, &ext, flags);
286 
287                                 if (ret && !ip_set_eexist(ret, flags))
288                                         return ret;
289 
290                                 ret = 0;
291                         } while (ip2++ < ip2_to);
292                         ip2 = ip2_from;
293                 }
294                 p = port;
295         }
296         return ret;
297 }
298 
299 /* IPv6 variant */
300 
301 struct hash_ipportnet6_elem {
302         union nf_inet_addr ip;
303         union nf_inet_addr ip2;
304         __be16 port;
305         u8 cidr:7;
306         u8 nomatch:1;
307         u8 proto;
308 };
309 
310 /* Common functions */
311 
312 static bool
313 hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1,
314                            const struct hash_ipportnet6_elem *ip2,
315                            u32 *multi)
316 {
317         return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
318                ipv6_addr_equal(&ip1->ip2.in6, &ip2->ip2.in6) &&
319                ip1->cidr == ip2->cidr &&
320                ip1->port == ip2->port &&
321                ip1->proto == ip2->proto;
322 }
323 
324 static int
325 hash_ipportnet6_do_data_match(const struct hash_ipportnet6_elem *elem)
326 {
327         return elem->nomatch ? -ENOTEMPTY : 1;
328 }
329 
330 static void
331 hash_ipportnet6_data_set_flags(struct hash_ipportnet6_elem *elem, u32 flags)
332 {
333         elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
334 }
335 
336 static void
337 hash_ipportnet6_data_reset_flags(struct hash_ipportnet6_elem *elem, u8 *flags)
338 {
339         swap(*flags, elem->nomatch);
340 }
341 
342 static void
343 hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr)
344 {
345         ip6_netmask(&elem->ip2, cidr);
346         elem->cidr = cidr - 1;
347 }
348 
349 static bool
350 hash_ipportnet6_data_list(struct sk_buff *skb,
351                           const struct hash_ipportnet6_elem *data)
352 {
353         u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
354 
355         if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
356             nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) ||
357             nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
358             nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) ||
359             nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
360             (flags &&
361              nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
362                 goto nla_put_failure;
363         return false;
364 
365 nla_put_failure:
366         return true;
367 }
368 
369 static void
370 hash_ipportnet6_data_next(struct hash_ipportnet6_elem *next,
371                           const struct hash_ipportnet6_elem *d)
372 {
373         next->port = d->port;
374 }
375 
376 #undef MTYPE
377 #undef HOST_MASK
378 
379 #define MTYPE           hash_ipportnet6
380 #define HOST_MASK       128
381 #define IP_SET_EMIT_CREATE
382 #include "ip_set_hash_gen.h"
383 
384 static int
385 hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
386                      const struct xt_action_param *par,
387                      enum ipset_adt adt, struct ip_set_adt_opt *opt)
388 {
389         const struct hash_ipportnet6 *h = set->data;
390         ipset_adtfn adtfn = set->variant->adt[adt];
391         struct hash_ipportnet6_elem e = {
392                 .cidr = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
393         };
394         struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
395 
396         if (adt == IPSET_TEST)
397                 e.cidr = HOST_MASK - 1;
398 
399         if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
400                                  &e.port, &e.proto))
401                 return -EINVAL;
402 
403         ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
404         ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2.in6);
405         ip6_netmask(&e.ip2, e.cidr + 1);
406 
407         return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
408 }
409 
410 static int
411 hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
412                      enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
413 {
414         const struct hash_ipportnet6 *h = set->data;
415         ipset_adtfn adtfn = set->variant->adt[adt];
416         struct hash_ipportnet6_elem e = { .cidr = HOST_MASK - 1 };
417         struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
418         u32 port, port_to;
419         bool with_ports = false;
420         u8 cidr;
421         int ret;
422 
423         if (tb[IPSET_ATTR_LINENO])
424                 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
425 
426         if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
427                      !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
428                      !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
429                      !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
430                 return -IPSET_ERR_PROTOCOL;
431         if (unlikely(tb[IPSET_ATTR_IP_TO]))
432                 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
433         if (unlikely(tb[IPSET_ATTR_CIDR])) {
434                 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
435 
436                 if (cidr != HOST_MASK)
437                         return -IPSET_ERR_INVALID_CIDR;
438         }
439 
440         ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
441         if (ret)
442                 return ret;
443 
444         ret = ip_set_get_extensions(set, tb, &ext);
445         if (ret)
446                 return ret;
447 
448         ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip2);
449         if (ret)
450                 return ret;
451 
452         if (tb[IPSET_ATTR_CIDR2]) {
453                 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
454                 if (!cidr || cidr > HOST_MASK)
455                         return -IPSET_ERR_INVALID_CIDR;
456                 e.cidr = cidr - 1;
457         }
458 
459         ip6_netmask(&e.ip2, e.cidr + 1);
460 
461         e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
462 
463         if (tb[IPSET_ATTR_PROTO]) {
464                 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
465                 with_ports = ip_set_proto_with_ports(e.proto);
466 
467                 if (e.proto == 0)
468                         return -IPSET_ERR_INVALID_PROTO;
469         } else {
470                 return -IPSET_ERR_MISSING_PROTO;
471         }
472 
473         if (!(with_ports || e.proto == IPPROTO_ICMPV6))
474                 e.port = 0;
475 
476         if (tb[IPSET_ATTR_CADT_FLAGS]) {
477                 u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
478 
479                 if (cadt_flags & IPSET_FLAG_NOMATCH)
480                         flags |= (IPSET_FLAG_NOMATCH << 16);
481         }
482 
483         if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
484                 ret = adtfn(set, &e, &ext, &ext, flags);
485                 return ip_set_enomatch(ret, flags, adt, set) ? -ret :
486                        ip_set_eexist(ret, flags) ? 0 : ret;
487         }
488 
489         port = ntohs(e.port);
490         port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
491         if (port > port_to)
492                 swap(port, port_to);
493 
494         if (retried)
495                 port = ntohs(h->next.port);
496         for (; port <= port_to; port++) {
497                 e.port = htons(port);
498                 ret = adtfn(set, &e, &ext, &ext, flags);
499 
500                 if (ret && !ip_set_eexist(ret, flags))
501                         return ret;
502 
503                 ret = 0;
504         }
505         return ret;
506 }
507 
508 static struct ip_set_type hash_ipportnet_type __read_mostly = {
509         .name           = "hash:ip,port,net",
510         .protocol       = IPSET_PROTOCOL,
511         .features       = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2 |
512                           IPSET_TYPE_NOMATCH,
513         .dimension      = IPSET_DIM_THREE,
514         .family         = NFPROTO_UNSPEC,
515         .revision_min   = IPSET_TYPE_REV_MIN,
516         .revision_max   = IPSET_TYPE_REV_MAX,
517         .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
518         .create         = hash_ipportnet_create,
519         .create_policy  = {
520                 [IPSET_ATTR_HASHSIZE]   = { .type = NLA_U32 },
521                 [IPSET_ATTR_MAXELEM]    = { .type = NLA_U32 },
522                 [IPSET_ATTR_INITVAL]    = { .type = NLA_U32 },
523                 [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
524                 [IPSET_ATTR_RESIZE]     = { .type = NLA_U8  },
525                 [IPSET_ATTR_TIMEOUT]    = { .type = NLA_U32 },
526                 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
527         },
528         .adt_policy     = {
529                 [IPSET_ATTR_IP]         = { .type = NLA_NESTED },
530                 [IPSET_ATTR_IP_TO]      = { .type = NLA_NESTED },
531                 [IPSET_ATTR_IP2]        = { .type = NLA_NESTED },
532                 [IPSET_ATTR_IP2_TO]     = { .type = NLA_NESTED },
533                 [IPSET_ATTR_PORT]       = { .type = NLA_U16 },
534                 [IPSET_ATTR_PORT_TO]    = { .type = NLA_U16 },
535                 [IPSET_ATTR_CIDR]       = { .type = NLA_U8 },
536                 [IPSET_ATTR_CIDR2]      = { .type = NLA_U8 },
537                 [IPSET_ATTR_PROTO]      = { .type = NLA_U8 },
538                 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
539                 [IPSET_ATTR_TIMEOUT]    = { .type = NLA_U32 },
540                 [IPSET_ATTR_LINENO]     = { .type = NLA_U32 },
541                 [IPSET_ATTR_BYTES]      = { .type = NLA_U64 },
542                 [IPSET_ATTR_PACKETS]    = { .type = NLA_U64 },
543                 [IPSET_ATTR_COMMENT]    = { .type = NLA_NUL_STRING,
544                                             .len  = IPSET_MAX_COMMENT_SIZE },
545                 [IPSET_ATTR_SKBMARK]    = { .type = NLA_U64 },
546                 [IPSET_ATTR_SKBPRIO]    = { .type = NLA_U32 },
547                 [IPSET_ATTR_SKBQUEUE]   = { .type = NLA_U16 },
548         },
549         .me             = THIS_MODULE,
550 };
551 
552 static int __init
553 hash_ipportnet_init(void)
554 {
555         return ip_set_type_register(&hash_ipportnet_type);
556 }
557 
558 static void __exit
559 hash_ipportnet_fini(void)
560 {
561         rcu_barrier();
562         ip_set_type_unregister(&hash_ipportnet_type);
563 }
564 
565 module_init(hash_ipportnet_init);
566 module_exit(hash_ipportnet_fini);
567 

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