1
2
3
4
5
6
7
8
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/module.h>
12#include <linux/netlink.h>
13#include <linux/netfilter.h>
14#include <linux/netfilter/nf_tables.h>
15#include <net/netfilter/nf_tables.h>
16#include <net/netfilter/nf_conntrack.h>
17#include <net/netfilter/nf_conntrack_acct.h>
18#include <net/netfilter/nf_conntrack_tuple.h>
19#include <net/netfilter/nf_conntrack_helper.h>
20#include <net/netfilter/nf_conntrack_ecache.h>
21#include <net/netfilter/nf_conntrack_labels.h>
22#include <net/netfilter/nf_conntrack_timeout.h>
23#include <net/netfilter/nf_conntrack_l4proto.h>
24#include <net/netfilter/nf_conntrack_expect.h>
25
26struct nft_ct {
27 enum nft_ct_keys key:8;
28 enum ip_conntrack_dir dir:8;
29 union {
30 enum nft_registers dreg:8;
31 enum nft_registers sreg:8;
32 };
33};
34
35struct nft_ct_helper_obj {
36 struct nf_conntrack_helper *helper4;
37 struct nf_conntrack_helper *helper6;
38 u8 l4proto;
39};
40
41#ifdef CONFIG_NF_CONNTRACK_ZONES
42static DEFINE_PER_CPU(struct nf_conn *, nft_ct_pcpu_template);
43static unsigned int nft_ct_pcpu_template_refcnt __read_mostly;
44#endif
45
46static u64 nft_ct_get_eval_counter(const struct nf_conn_counter *c,
47 enum nft_ct_keys k,
48 enum ip_conntrack_dir d)
49{
50 if (d < IP_CT_DIR_MAX)
51 return k == NFT_CT_BYTES ? atomic64_read(&c[d].bytes) :
52 atomic64_read(&c[d].packets);
53
54 return nft_ct_get_eval_counter(c, k, IP_CT_DIR_ORIGINAL) +
55 nft_ct_get_eval_counter(c, k, IP_CT_DIR_REPLY);
56}
57
58static void nft_ct_get_eval(const struct nft_expr *expr,
59 struct nft_regs *regs,
60 const struct nft_pktinfo *pkt)
61{
62 const struct nft_ct *priv = nft_expr_priv(expr);
63 u32 *dest = ®s->data[priv->dreg];
64 enum ip_conntrack_info ctinfo;
65 const struct nf_conn *ct;
66 const struct nf_conn_help *help;
67 const struct nf_conntrack_tuple *tuple;
68 const struct nf_conntrack_helper *helper;
69 unsigned int state;
70
71 ct = nf_ct_get(pkt->skb, &ctinfo);
72
73 switch (priv->key) {
74 case NFT_CT_STATE:
75 if (ct)
76 state = NF_CT_STATE_BIT(ctinfo);
77 else if (ctinfo == IP_CT_UNTRACKED)
78 state = NF_CT_STATE_UNTRACKED_BIT;
79 else
80 state = NF_CT_STATE_INVALID_BIT;
81 *dest = state;
82 return;
83 default:
84 break;
85 }
86
87 if (ct == NULL)
88 goto err;
89
90 switch (priv->key) {
91 case NFT_CT_DIRECTION:
92 nft_reg_store8(dest, CTINFO2DIR(ctinfo));
93 return;
94 case NFT_CT_STATUS:
95 *dest = ct->status;
96 return;
97#ifdef CONFIG_NF_CONNTRACK_MARK
98 case NFT_CT_MARK:
99 *dest = ct->mark;
100 return;
101#endif
102#ifdef CONFIG_NF_CONNTRACK_SECMARK
103 case NFT_CT_SECMARK:
104 *dest = ct->secmark;
105 return;
106#endif
107 case NFT_CT_EXPIRATION:
108 *dest = jiffies_to_msecs(nf_ct_expires(ct));
109 return;
110 case NFT_CT_HELPER:
111 if (ct->master == NULL)
112 goto err;
113 help = nfct_help(ct->master);
114 if (help == NULL)
115 goto err;
116 helper = rcu_dereference(help->helper);
117 if (helper == NULL)
118 goto err;
119 strncpy((char *)dest, helper->name, NF_CT_HELPER_NAME_LEN);
120 return;
121#ifdef CONFIG_NF_CONNTRACK_LABELS
122 case NFT_CT_LABELS: {
123 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
124
125 if (labels)
126 memcpy(dest, labels->bits, NF_CT_LABELS_MAX_SIZE);
127 else
128 memset(dest, 0, NF_CT_LABELS_MAX_SIZE);
129 return;
130 }
131#endif
132 case NFT_CT_BYTES:
133 case NFT_CT_PKTS: {
134 const struct nf_conn_acct *acct = nf_conn_acct_find(ct);
135 u64 count = 0;
136
137 if (acct)
138 count = nft_ct_get_eval_counter(acct->counter,
139 priv->key, priv->dir);
140 memcpy(dest, &count, sizeof(count));
141 return;
142 }
143 case NFT_CT_AVGPKT: {
144 const struct nf_conn_acct *acct = nf_conn_acct_find(ct);
145 u64 avgcnt = 0, bcnt = 0, pcnt = 0;
146
147 if (acct) {
148 pcnt = nft_ct_get_eval_counter(acct->counter,
149 NFT_CT_PKTS, priv->dir);
150 bcnt = nft_ct_get_eval_counter(acct->counter,
151 NFT_CT_BYTES, priv->dir);
152 if (pcnt != 0)
153 avgcnt = div64_u64(bcnt, pcnt);
154 }
155
156 memcpy(dest, &avgcnt, sizeof(avgcnt));
157 return;
158 }
159 case NFT_CT_L3PROTOCOL:
160 nft_reg_store8(dest, nf_ct_l3num(ct));
161 return;
162 case NFT_CT_PROTOCOL:
163 nft_reg_store8(dest, nf_ct_protonum(ct));
164 return;
165#ifdef CONFIG_NF_CONNTRACK_ZONES
166 case NFT_CT_ZONE: {
167 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
168 u16 zoneid;
169
170 if (priv->dir < IP_CT_DIR_MAX)
171 zoneid = nf_ct_zone_id(zone, priv->dir);
172 else
173 zoneid = zone->id;
174
175 nft_reg_store16(dest, zoneid);
176 return;
177 }
178#endif
179 case NFT_CT_ID:
180 if (!nf_ct_is_confirmed(ct))
181 goto err;
182 *dest = nf_ct_get_id(ct);
183 return;
184 default:
185 break;
186 }
187
188 tuple = &ct->tuplehash[priv->dir].tuple;
189 switch (priv->key) {
190 case NFT_CT_SRC:
191 memcpy(dest, tuple->src.u3.all,
192 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16);
193 return;
194 case NFT_CT_DST:
195 memcpy(dest, tuple->dst.u3.all,
196 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16);
197 return;
198 case NFT_CT_PROTO_SRC:
199 nft_reg_store16(dest, (__force u16)tuple->src.u.all);
200 return;
201 case NFT_CT_PROTO_DST:
202 nft_reg_store16(dest, (__force u16)tuple->dst.u.all);
203 return;
204 case NFT_CT_SRC_IP:
205 if (nf_ct_l3num(ct) != NFPROTO_IPV4)
206 goto err;
207 *dest = tuple->src.u3.ip;
208 return;
209 case NFT_CT_DST_IP:
210 if (nf_ct_l3num(ct) != NFPROTO_IPV4)
211 goto err;
212 *dest = tuple->dst.u3.ip;
213 return;
214 case NFT_CT_SRC_IP6:
215 if (nf_ct_l3num(ct) != NFPROTO_IPV6)
216 goto err;
217 memcpy(dest, tuple->src.u3.ip6, sizeof(struct in6_addr));
218 return;
219 case NFT_CT_DST_IP6:
220 if (nf_ct_l3num(ct) != NFPROTO_IPV6)
221 goto err;
222 memcpy(dest, tuple->dst.u3.ip6, sizeof(struct in6_addr));
223 return;
224 default:
225 break;
226 }
227 return;
228err:
229 regs->verdict.code = NFT_BREAK;
230}
231
232#ifdef CONFIG_NF_CONNTRACK_ZONES
233static void nft_ct_set_zone_eval(const struct nft_expr *expr,
234 struct nft_regs *regs,
235 const struct nft_pktinfo *pkt)
236{
237 struct nf_conntrack_zone zone = { .dir = NF_CT_DEFAULT_ZONE_DIR };
238 const struct nft_ct *priv = nft_expr_priv(expr);
239 struct sk_buff *skb = pkt->skb;
240 enum ip_conntrack_info ctinfo;
241 u16 value = nft_reg_load16(®s->data[priv->sreg]);
242 struct nf_conn *ct;
243
244 ct = nf_ct_get(skb, &ctinfo);
245 if (ct)
246 return;
247
248 zone.id = value;
249
250 switch (priv->dir) {
251 case IP_CT_DIR_ORIGINAL:
252 zone.dir = NF_CT_ZONE_DIR_ORIG;
253 break;
254 case IP_CT_DIR_REPLY:
255 zone.dir = NF_CT_ZONE_DIR_REPL;
256 break;
257 default:
258 break;
259 }
260
261 ct = this_cpu_read(nft_ct_pcpu_template);
262
263 if (likely(atomic_read(&ct->ct_general.use) == 1)) {
264 nf_ct_zone_add(ct, &zone);
265 } else {
266
267 ct = nf_ct_tmpl_alloc(nft_net(pkt), &zone, GFP_ATOMIC);
268 if (!ct) {
269 regs->verdict.code = NF_DROP;
270 return;
271 }
272 }
273
274 atomic_inc(&ct->ct_general.use);
275 nf_ct_set(skb, ct, IP_CT_NEW);
276}
277#endif
278
279static void nft_ct_set_eval(const struct nft_expr *expr,
280 struct nft_regs *regs,
281 const struct nft_pktinfo *pkt)
282{
283 const struct nft_ct *priv = nft_expr_priv(expr);
284 struct sk_buff *skb = pkt->skb;
285#if defined(CONFIG_NF_CONNTRACK_MARK) || defined(CONFIG_NF_CONNTRACK_SECMARK)
286 u32 value = regs->data[priv->sreg];
287#endif
288 enum ip_conntrack_info ctinfo;
289 struct nf_conn *ct;
290
291 ct = nf_ct_get(skb, &ctinfo);
292 if (ct == NULL || nf_ct_is_template(ct))
293 return;
294
295 switch (priv->key) {
296#ifdef CONFIG_NF_CONNTRACK_MARK
297 case NFT_CT_MARK:
298 if (ct->mark != value) {
299 ct->mark = value;
300 nf_conntrack_event_cache(IPCT_MARK, ct);
301 }
302 break;
303#endif
304#ifdef CONFIG_NF_CONNTRACK_SECMARK
305 case NFT_CT_SECMARK:
306 if (ct->secmark != value) {
307 ct->secmark = value;
308 nf_conntrack_event_cache(IPCT_SECMARK, ct);
309 }
310 break;
311#endif
312#ifdef CONFIG_NF_CONNTRACK_LABELS
313 case NFT_CT_LABELS:
314 nf_connlabels_replace(ct,
315 ®s->data[priv->sreg],
316 ®s->data[priv->sreg],
317 NF_CT_LABELS_MAX_SIZE / sizeof(u32));
318 break;
319#endif
320#ifdef CONFIG_NF_CONNTRACK_EVENTS
321 case NFT_CT_EVENTMASK: {
322 struct nf_conntrack_ecache *e = nf_ct_ecache_find(ct);
323 u32 ctmask = regs->data[priv->sreg];
324
325 if (e) {
326 if (e->ctmask != ctmask)
327 e->ctmask = ctmask;
328 break;
329 }
330
331 if (ctmask && !nf_ct_is_confirmed(ct))
332 nf_ct_ecache_ext_add(ct, ctmask, 0, GFP_ATOMIC);
333 break;
334 }
335#endif
336 default:
337 break;
338 }
339}
340
341static const struct nla_policy nft_ct_policy[NFTA_CT_MAX + 1] = {
342 [NFTA_CT_DREG] = { .type = NLA_U32 },
343 [NFTA_CT_KEY] = { .type = NLA_U32 },
344 [NFTA_CT_DIRECTION] = { .type = NLA_U8 },
345 [NFTA_CT_SREG] = { .type = NLA_U32 },
346};
347
348#ifdef CONFIG_NF_CONNTRACK_ZONES
349static void nft_ct_tmpl_put_pcpu(void)
350{
351 struct nf_conn *ct;
352 int cpu;
353
354 for_each_possible_cpu(cpu) {
355 ct = per_cpu(nft_ct_pcpu_template, cpu);
356 if (!ct)
357 break;
358 nf_ct_put(ct);
359 per_cpu(nft_ct_pcpu_template, cpu) = NULL;
360 }
361}
362
363static bool nft_ct_tmpl_alloc_pcpu(void)
364{
365 struct nf_conntrack_zone zone = { .id = 0 };
366 struct nf_conn *tmp;
367 int cpu;
368
369 if (nft_ct_pcpu_template_refcnt)
370 return true;
371
372 for_each_possible_cpu(cpu) {
373 tmp = nf_ct_tmpl_alloc(&init_net, &zone, GFP_KERNEL);
374 if (!tmp) {
375 nft_ct_tmpl_put_pcpu();
376 return false;
377 }
378
379 atomic_set(&tmp->ct_general.use, 1);
380 per_cpu(nft_ct_pcpu_template, cpu) = tmp;
381 }
382
383 return true;
384}
385#endif
386
387static int nft_ct_get_init(const struct nft_ctx *ctx,
388 const struct nft_expr *expr,
389 const struct nlattr * const tb[])
390{
391 struct nft_ct *priv = nft_expr_priv(expr);
392 unsigned int len;
393 int err;
394
395 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
396 priv->dir = IP_CT_DIR_MAX;
397 switch (priv->key) {
398 case NFT_CT_DIRECTION:
399 if (tb[NFTA_CT_DIRECTION] != NULL)
400 return -EINVAL;
401 len = sizeof(u8);
402 break;
403 case NFT_CT_STATE:
404 case NFT_CT_STATUS:
405#ifdef CONFIG_NF_CONNTRACK_MARK
406 case NFT_CT_MARK:
407#endif
408#ifdef CONFIG_NF_CONNTRACK_SECMARK
409 case NFT_CT_SECMARK:
410#endif
411 case NFT_CT_EXPIRATION:
412 if (tb[NFTA_CT_DIRECTION] != NULL)
413 return -EINVAL;
414 len = sizeof(u32);
415 break;
416#ifdef CONFIG_NF_CONNTRACK_LABELS
417 case NFT_CT_LABELS:
418 if (tb[NFTA_CT_DIRECTION] != NULL)
419 return -EINVAL;
420 len = NF_CT_LABELS_MAX_SIZE;
421 break;
422#endif
423 case NFT_CT_HELPER:
424 if (tb[NFTA_CT_DIRECTION] != NULL)
425 return -EINVAL;
426 len = NF_CT_HELPER_NAME_LEN;
427 break;
428
429 case NFT_CT_L3PROTOCOL:
430 case NFT_CT_PROTOCOL:
431
432
433
434 len = sizeof(u8);
435 break;
436 case NFT_CT_SRC:
437 case NFT_CT_DST:
438 if (tb[NFTA_CT_DIRECTION] == NULL)
439 return -EINVAL;
440
441 switch (ctx->family) {
442 case NFPROTO_IPV4:
443 len = FIELD_SIZEOF(struct nf_conntrack_tuple,
444 src.u3.ip);
445 break;
446 case NFPROTO_IPV6:
447 case NFPROTO_INET:
448 len = FIELD_SIZEOF(struct nf_conntrack_tuple,
449 src.u3.ip6);
450 break;
451 default:
452 return -EAFNOSUPPORT;
453 }
454 break;
455 case NFT_CT_SRC_IP:
456 case NFT_CT_DST_IP:
457 if (tb[NFTA_CT_DIRECTION] == NULL)
458 return -EINVAL;
459
460 len = FIELD_SIZEOF(struct nf_conntrack_tuple, src.u3.ip);
461 break;
462 case NFT_CT_SRC_IP6:
463 case NFT_CT_DST_IP6:
464 if (tb[NFTA_CT_DIRECTION] == NULL)
465 return -EINVAL;
466
467 len = FIELD_SIZEOF(struct nf_conntrack_tuple, src.u3.ip6);
468 break;
469 case NFT_CT_PROTO_SRC:
470 case NFT_CT_PROTO_DST:
471 if (tb[NFTA_CT_DIRECTION] == NULL)
472 return -EINVAL;
473 len = FIELD_SIZEOF(struct nf_conntrack_tuple, src.u.all);
474 break;
475 case NFT_CT_BYTES:
476 case NFT_CT_PKTS:
477 case NFT_CT_AVGPKT:
478 len = sizeof(u64);
479 break;
480#ifdef CONFIG_NF_CONNTRACK_ZONES
481 case NFT_CT_ZONE:
482 len = sizeof(u16);
483 break;
484#endif
485 case NFT_CT_ID:
486 len = sizeof(u32);
487 break;
488 default:
489 return -EOPNOTSUPP;
490 }
491
492 if (tb[NFTA_CT_DIRECTION] != NULL) {
493 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]);
494 switch (priv->dir) {
495 case IP_CT_DIR_ORIGINAL:
496 case IP_CT_DIR_REPLY:
497 break;
498 default:
499 return -EINVAL;
500 }
501 }
502
503 priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]);
504 err = nft_validate_register_store(ctx, priv->dreg, NULL,
505 NFT_DATA_VALUE, len);
506 if (err < 0)
507 return err;
508
509 err = nf_ct_netns_get(ctx->net, ctx->family);
510 if (err < 0)
511 return err;
512
513 if (priv->key == NFT_CT_BYTES ||
514 priv->key == NFT_CT_PKTS ||
515 priv->key == NFT_CT_AVGPKT)
516 nf_ct_set_acct(ctx->net, true);
517
518 return 0;
519}
520
521static void __nft_ct_set_destroy(const struct nft_ctx *ctx, struct nft_ct *priv)
522{
523 switch (priv->key) {
524#ifdef CONFIG_NF_CONNTRACK_LABELS
525 case NFT_CT_LABELS:
526 nf_connlabels_put(ctx->net);
527 break;
528#endif
529#ifdef CONFIG_NF_CONNTRACK_ZONES
530 case NFT_CT_ZONE:
531 if (--nft_ct_pcpu_template_refcnt == 0)
532 nft_ct_tmpl_put_pcpu();
533#endif
534 default:
535 break;
536 }
537}
538
539static int nft_ct_set_init(const struct nft_ctx *ctx,
540 const struct nft_expr *expr,
541 const struct nlattr * const tb[])
542{
543 struct nft_ct *priv = nft_expr_priv(expr);
544 unsigned int len;
545 int err;
546
547 priv->dir = IP_CT_DIR_MAX;
548 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
549 switch (priv->key) {
550#ifdef CONFIG_NF_CONNTRACK_MARK
551 case NFT_CT_MARK:
552 if (tb[NFTA_CT_DIRECTION])
553 return -EINVAL;
554 len = FIELD_SIZEOF(struct nf_conn, mark);
555 break;
556#endif
557#ifdef CONFIG_NF_CONNTRACK_LABELS
558 case NFT_CT_LABELS:
559 if (tb[NFTA_CT_DIRECTION])
560 return -EINVAL;
561 len = NF_CT_LABELS_MAX_SIZE;
562 err = nf_connlabels_get(ctx->net, (len * BITS_PER_BYTE) - 1);
563 if (err)
564 return err;
565 break;
566#endif
567#ifdef CONFIG_NF_CONNTRACK_ZONES
568 case NFT_CT_ZONE:
569 if (!nft_ct_tmpl_alloc_pcpu())
570 return -ENOMEM;
571 nft_ct_pcpu_template_refcnt++;
572 len = sizeof(u16);
573 break;
574#endif
575#ifdef CONFIG_NF_CONNTRACK_EVENTS
576 case NFT_CT_EVENTMASK:
577 if (tb[NFTA_CT_DIRECTION])
578 return -EINVAL;
579 len = sizeof(u32);
580 break;
581#endif
582#ifdef CONFIG_NF_CONNTRACK_SECMARK
583 case NFT_CT_SECMARK:
584 if (tb[NFTA_CT_DIRECTION])
585 return -EINVAL;
586 len = sizeof(u32);
587 break;
588#endif
589 default:
590 return -EOPNOTSUPP;
591 }
592
593 if (tb[NFTA_CT_DIRECTION]) {
594 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]);
595 switch (priv->dir) {
596 case IP_CT_DIR_ORIGINAL:
597 case IP_CT_DIR_REPLY:
598 break;
599 default:
600 err = -EINVAL;
601 goto err1;
602 }
603 }
604
605 priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]);
606 err = nft_validate_register_load(priv->sreg, len);
607 if (err < 0)
608 goto err1;
609
610 err = nf_ct_netns_get(ctx->net, ctx->family);
611 if (err < 0)
612 goto err1;
613
614 return 0;
615
616err1:
617 __nft_ct_set_destroy(ctx, priv);
618 return err;
619}
620
621static void nft_ct_get_destroy(const struct nft_ctx *ctx,
622 const struct nft_expr *expr)
623{
624 nf_ct_netns_put(ctx->net, ctx->family);
625}
626
627static void nft_ct_set_destroy(const struct nft_ctx *ctx,
628 const struct nft_expr *expr)
629{
630 struct nft_ct *priv = nft_expr_priv(expr);
631
632 __nft_ct_set_destroy(ctx, priv);
633 nf_ct_netns_put(ctx->net, ctx->family);
634}
635
636static int nft_ct_get_dump(struct sk_buff *skb, const struct nft_expr *expr)
637{
638 const struct nft_ct *priv = nft_expr_priv(expr);
639
640 if (nft_dump_register(skb, NFTA_CT_DREG, priv->dreg))
641 goto nla_put_failure;
642 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
643 goto nla_put_failure;
644
645 switch (priv->key) {
646 case NFT_CT_SRC:
647 case NFT_CT_DST:
648 case NFT_CT_SRC_IP:
649 case NFT_CT_DST_IP:
650 case NFT_CT_SRC_IP6:
651 case NFT_CT_DST_IP6:
652 case NFT_CT_PROTO_SRC:
653 case NFT_CT_PROTO_DST:
654 if (nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir))
655 goto nla_put_failure;
656 break;
657 case NFT_CT_BYTES:
658 case NFT_CT_PKTS:
659 case NFT_CT_AVGPKT:
660 case NFT_CT_ZONE:
661 if (priv->dir < IP_CT_DIR_MAX &&
662 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir))
663 goto nla_put_failure;
664 break;
665 default:
666 break;
667 }
668
669 return 0;
670
671nla_put_failure:
672 return -1;
673}
674
675static int nft_ct_set_dump(struct sk_buff *skb, const struct nft_expr *expr)
676{
677 const struct nft_ct *priv = nft_expr_priv(expr);
678
679 if (nft_dump_register(skb, NFTA_CT_SREG, priv->sreg))
680 goto nla_put_failure;
681 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
682 goto nla_put_failure;
683
684 switch (priv->key) {
685 case NFT_CT_ZONE:
686 if (priv->dir < IP_CT_DIR_MAX &&
687 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir))
688 goto nla_put_failure;
689 break;
690 default:
691 break;
692 }
693
694 return 0;
695
696nla_put_failure:
697 return -1;
698}
699
700static struct nft_expr_type nft_ct_type;
701static const struct nft_expr_ops nft_ct_get_ops = {
702 .type = &nft_ct_type,
703 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
704 .eval = nft_ct_get_eval,
705 .init = nft_ct_get_init,
706 .destroy = nft_ct_get_destroy,
707 .dump = nft_ct_get_dump,
708};
709
710static const struct nft_expr_ops nft_ct_set_ops = {
711 .type = &nft_ct_type,
712 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
713 .eval = nft_ct_set_eval,
714 .init = nft_ct_set_init,
715 .destroy = nft_ct_set_destroy,
716 .dump = nft_ct_set_dump,
717};
718
719#ifdef CONFIG_NF_CONNTRACK_ZONES
720static const struct nft_expr_ops nft_ct_set_zone_ops = {
721 .type = &nft_ct_type,
722 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
723 .eval = nft_ct_set_zone_eval,
724 .init = nft_ct_set_init,
725 .destroy = nft_ct_set_destroy,
726 .dump = nft_ct_set_dump,
727};
728#endif
729
730static const struct nft_expr_ops *
731nft_ct_select_ops(const struct nft_ctx *ctx,
732 const struct nlattr * const tb[])
733{
734 if (tb[NFTA_CT_KEY] == NULL)
735 return ERR_PTR(-EINVAL);
736
737 if (tb[NFTA_CT_DREG] && tb[NFTA_CT_SREG])
738 return ERR_PTR(-EINVAL);
739
740 if (tb[NFTA_CT_DREG])
741 return &nft_ct_get_ops;
742
743 if (tb[NFTA_CT_SREG]) {
744#ifdef CONFIG_NF_CONNTRACK_ZONES
745 if (nla_get_be32(tb[NFTA_CT_KEY]) == htonl(NFT_CT_ZONE))
746 return &nft_ct_set_zone_ops;
747#endif
748 return &nft_ct_set_ops;
749 }
750
751 return ERR_PTR(-EINVAL);
752}
753
754static struct nft_expr_type nft_ct_type __read_mostly = {
755 .name = "ct",
756 .select_ops = nft_ct_select_ops,
757 .policy = nft_ct_policy,
758 .maxattr = NFTA_CT_MAX,
759 .owner = THIS_MODULE,
760};
761
762static void nft_notrack_eval(const struct nft_expr *expr,
763 struct nft_regs *regs,
764 const struct nft_pktinfo *pkt)
765{
766 struct sk_buff *skb = pkt->skb;
767 enum ip_conntrack_info ctinfo;
768 struct nf_conn *ct;
769
770 ct = nf_ct_get(pkt->skb, &ctinfo);
771
772 if (ct || ctinfo == IP_CT_UNTRACKED)
773 return;
774
775 nf_ct_set(skb, ct, IP_CT_UNTRACKED);
776}
777
778static struct nft_expr_type nft_notrack_type;
779static const struct nft_expr_ops nft_notrack_ops = {
780 .type = &nft_notrack_type,
781 .size = NFT_EXPR_SIZE(0),
782 .eval = nft_notrack_eval,
783};
784
785static struct nft_expr_type nft_notrack_type __read_mostly = {
786 .name = "notrack",
787 .ops = &nft_notrack_ops,
788 .owner = THIS_MODULE,
789};
790
791#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
792static int
793nft_ct_timeout_parse_policy(void *timeouts,
794 const struct nf_conntrack_l4proto *l4proto,
795 struct net *net, const struct nlattr *attr)
796{
797 struct nlattr **tb;
798 int ret = 0;
799
800 tb = kcalloc(l4proto->ctnl_timeout.nlattr_max + 1, sizeof(*tb),
801 GFP_KERNEL);
802
803 if (!tb)
804 return -ENOMEM;
805
806 ret = nla_parse_nested_deprecated(tb,
807 l4proto->ctnl_timeout.nlattr_max,
808 attr,
809 l4proto->ctnl_timeout.nla_policy,
810 NULL);
811 if (ret < 0)
812 goto err;
813
814 ret = l4proto->ctnl_timeout.nlattr_to_obj(tb, net, timeouts);
815
816err:
817 kfree(tb);
818 return ret;
819}
820
821struct nft_ct_timeout_obj {
822 struct nf_ct_timeout *timeout;
823 u8 l4proto;
824};
825
826static void nft_ct_timeout_obj_eval(struct nft_object *obj,
827 struct nft_regs *regs,
828 const struct nft_pktinfo *pkt)
829{
830 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
831 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb);
832 struct nf_conn_timeout *timeout;
833 const unsigned int *values;
834
835 if (priv->l4proto != pkt->tprot)
836 return;
837
838 if (!ct || nf_ct_is_template(ct) || nf_ct_is_confirmed(ct))
839 return;
840
841 timeout = nf_ct_timeout_find(ct);
842 if (!timeout) {
843 timeout = nf_ct_timeout_ext_add(ct, priv->timeout, GFP_ATOMIC);
844 if (!timeout) {
845 regs->verdict.code = NF_DROP;
846 return;
847 }
848 }
849
850 rcu_assign_pointer(timeout->timeout, priv->timeout);
851
852
853
854
855 values = nf_ct_timeout_data(timeout);
856 if (values)
857 nf_ct_refresh(ct, pkt->skb, values[0]);
858}
859
860static int nft_ct_timeout_obj_init(const struct nft_ctx *ctx,
861 const struct nlattr * const tb[],
862 struct nft_object *obj)
863{
864 struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
865 const struct nf_conntrack_l4proto *l4proto;
866 struct nf_ct_timeout *timeout;
867 int l3num = ctx->family;
868 __u8 l4num;
869 int ret;
870
871 if (!tb[NFTA_CT_TIMEOUT_L4PROTO] ||
872 !tb[NFTA_CT_TIMEOUT_DATA])
873 return -EINVAL;
874
875 if (tb[NFTA_CT_TIMEOUT_L3PROTO])
876 l3num = ntohs(nla_get_be16(tb[NFTA_CT_TIMEOUT_L3PROTO]));
877
878 l4num = nla_get_u8(tb[NFTA_CT_TIMEOUT_L4PROTO]);
879 priv->l4proto = l4num;
880
881 l4proto = nf_ct_l4proto_find(l4num);
882
883 if (l4proto->l4proto != l4num) {
884 ret = -EOPNOTSUPP;
885 goto err_proto_put;
886 }
887
888 timeout = kzalloc(sizeof(struct nf_ct_timeout) +
889 l4proto->ctnl_timeout.obj_size, GFP_KERNEL);
890 if (timeout == NULL) {
891 ret = -ENOMEM;
892 goto err_proto_put;
893 }
894
895 ret = nft_ct_timeout_parse_policy(&timeout->data, l4proto, ctx->net,
896 tb[NFTA_CT_TIMEOUT_DATA]);
897 if (ret < 0)
898 goto err_free_timeout;
899
900 timeout->l3num = l3num;
901 timeout->l4proto = l4proto;
902
903 ret = nf_ct_netns_get(ctx->net, ctx->family);
904 if (ret < 0)
905 goto err_free_timeout;
906
907 priv->timeout = timeout;
908 return 0;
909
910err_free_timeout:
911 kfree(timeout);
912err_proto_put:
913 return ret;
914}
915
916static void nft_ct_timeout_obj_destroy(const struct nft_ctx *ctx,
917 struct nft_object *obj)
918{
919 struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
920 struct nf_ct_timeout *timeout = priv->timeout;
921
922 nf_ct_untimeout(ctx->net, timeout);
923 nf_ct_netns_put(ctx->net, ctx->family);
924 kfree(priv->timeout);
925}
926
927static int nft_ct_timeout_obj_dump(struct sk_buff *skb,
928 struct nft_object *obj, bool reset)
929{
930 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
931 const struct nf_ct_timeout *timeout = priv->timeout;
932 struct nlattr *nest_params;
933 int ret;
934
935 if (nla_put_u8(skb, NFTA_CT_TIMEOUT_L4PROTO, timeout->l4proto->l4proto) ||
936 nla_put_be16(skb, NFTA_CT_TIMEOUT_L3PROTO, htons(timeout->l3num)))
937 return -1;
938
939 nest_params = nla_nest_start(skb, NFTA_CT_TIMEOUT_DATA);
940 if (!nest_params)
941 return -1;
942
943 ret = timeout->l4proto->ctnl_timeout.obj_to_nlattr(skb, &timeout->data);
944 if (ret < 0)
945 return -1;
946 nla_nest_end(skb, nest_params);
947 return 0;
948}
949
950static const struct nla_policy nft_ct_timeout_policy[NFTA_CT_TIMEOUT_MAX + 1] = {
951 [NFTA_CT_TIMEOUT_L3PROTO] = {.type = NLA_U16 },
952 [NFTA_CT_TIMEOUT_L4PROTO] = {.type = NLA_U8 },
953 [NFTA_CT_TIMEOUT_DATA] = {.type = NLA_NESTED },
954};
955
956static struct nft_object_type nft_ct_timeout_obj_type;
957
958static const struct nft_object_ops nft_ct_timeout_obj_ops = {
959 .type = &nft_ct_timeout_obj_type,
960 .size = sizeof(struct nft_ct_timeout_obj),
961 .eval = nft_ct_timeout_obj_eval,
962 .init = nft_ct_timeout_obj_init,
963 .destroy = nft_ct_timeout_obj_destroy,
964 .dump = nft_ct_timeout_obj_dump,
965};
966
967static struct nft_object_type nft_ct_timeout_obj_type __read_mostly = {
968 .type = NFT_OBJECT_CT_TIMEOUT,
969 .ops = &nft_ct_timeout_obj_ops,
970 .maxattr = NFTA_CT_TIMEOUT_MAX,
971 .policy = nft_ct_timeout_policy,
972 .owner = THIS_MODULE,
973};
974#endif
975
976static int nft_ct_helper_obj_init(const struct nft_ctx *ctx,
977 const struct nlattr * const tb[],
978 struct nft_object *obj)
979{
980 struct nft_ct_helper_obj *priv = nft_obj_data(obj);
981 struct nf_conntrack_helper *help4, *help6;
982 char name[NF_CT_HELPER_NAME_LEN];
983 int family = ctx->family;
984 int err;
985
986 if (!tb[NFTA_CT_HELPER_NAME] || !tb[NFTA_CT_HELPER_L4PROTO])
987 return -EINVAL;
988
989 priv->l4proto = nla_get_u8(tb[NFTA_CT_HELPER_L4PROTO]);
990 if (!priv->l4proto)
991 return -ENOENT;
992
993 nla_strlcpy(name, tb[NFTA_CT_HELPER_NAME], sizeof(name));
994
995 if (tb[NFTA_CT_HELPER_L3PROTO])
996 family = ntohs(nla_get_be16(tb[NFTA_CT_HELPER_L3PROTO]));
997
998 help4 = NULL;
999 help6 = NULL;
1000
1001 switch (family) {
1002 case NFPROTO_IPV4:
1003 if (ctx->family == NFPROTO_IPV6)
1004 return -EINVAL;
1005
1006 help4 = nf_conntrack_helper_try_module_get(name, family,
1007 priv->l4proto);
1008 break;
1009 case NFPROTO_IPV6:
1010 if (ctx->family == NFPROTO_IPV4)
1011 return -EINVAL;
1012
1013 help6 = nf_conntrack_helper_try_module_get(name, family,
1014 priv->l4proto);
1015 break;
1016 case NFPROTO_NETDEV:
1017 case NFPROTO_BRIDGE:
1018 case NFPROTO_INET:
1019 help4 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV4,
1020 priv->l4proto);
1021 help6 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV6,
1022 priv->l4proto);
1023 break;
1024 default:
1025 return -EAFNOSUPPORT;
1026 }
1027
1028
1029 if (!help4 && !help6)
1030 return -ENOENT;
1031
1032 priv->helper4 = help4;
1033 priv->helper6 = help6;
1034
1035 err = nf_ct_netns_get(ctx->net, ctx->family);
1036 if (err < 0)
1037 goto err_put_helper;
1038
1039 return 0;
1040
1041err_put_helper:
1042 if (priv->helper4)
1043 nf_conntrack_helper_put(priv->helper4);
1044 if (priv->helper6)
1045 nf_conntrack_helper_put(priv->helper6);
1046 return err;
1047}
1048
1049static void nft_ct_helper_obj_destroy(const struct nft_ctx *ctx,
1050 struct nft_object *obj)
1051{
1052 struct nft_ct_helper_obj *priv = nft_obj_data(obj);
1053
1054 if (priv->helper4)
1055 nf_conntrack_helper_put(priv->helper4);
1056 if (priv->helper6)
1057 nf_conntrack_helper_put(priv->helper6);
1058
1059 nf_ct_netns_put(ctx->net, ctx->family);
1060}
1061
1062static void nft_ct_helper_obj_eval(struct nft_object *obj,
1063 struct nft_regs *regs,
1064 const struct nft_pktinfo *pkt)
1065{
1066 const struct nft_ct_helper_obj *priv = nft_obj_data(obj);
1067 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb);
1068 struct nf_conntrack_helper *to_assign = NULL;
1069 struct nf_conn_help *help;
1070
1071 if (!ct ||
1072 nf_ct_is_confirmed(ct) ||
1073 nf_ct_is_template(ct) ||
1074 priv->l4proto != nf_ct_protonum(ct))
1075 return;
1076
1077 switch (nf_ct_l3num(ct)) {
1078 case NFPROTO_IPV4:
1079 to_assign = priv->helper4;
1080 break;
1081 case NFPROTO_IPV6:
1082 to_assign = priv->helper6;
1083 break;
1084 default:
1085 WARN_ON_ONCE(1);
1086 return;
1087 }
1088
1089 if (!to_assign)
1090 return;
1091
1092 if (test_bit(IPS_HELPER_BIT, &ct->status))
1093 return;
1094
1095 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
1096 if (help) {
1097 rcu_assign_pointer(help->helper, to_assign);
1098 set_bit(IPS_HELPER_BIT, &ct->status);
1099 }
1100}
1101
1102static int nft_ct_helper_obj_dump(struct sk_buff *skb,
1103 struct nft_object *obj, bool reset)
1104{
1105 const struct nft_ct_helper_obj *priv = nft_obj_data(obj);
1106 const struct nf_conntrack_helper *helper;
1107 u16 family;
1108
1109 if (priv->helper4 && priv->helper6) {
1110 family = NFPROTO_INET;
1111 helper = priv->helper4;
1112 } else if (priv->helper6) {
1113 family = NFPROTO_IPV6;
1114 helper = priv->helper6;
1115 } else {
1116 family = NFPROTO_IPV4;
1117 helper = priv->helper4;
1118 }
1119
1120 if (nla_put_string(skb, NFTA_CT_HELPER_NAME, helper->name))
1121 return -1;
1122
1123 if (nla_put_u8(skb, NFTA_CT_HELPER_L4PROTO, priv->l4proto))
1124 return -1;
1125
1126 if (nla_put_be16(skb, NFTA_CT_HELPER_L3PROTO, htons(family)))
1127 return -1;
1128
1129 return 0;
1130}
1131
1132static const struct nla_policy nft_ct_helper_policy[NFTA_CT_HELPER_MAX + 1] = {
1133 [NFTA_CT_HELPER_NAME] = { .type = NLA_STRING,
1134 .len = NF_CT_HELPER_NAME_LEN - 1 },
1135 [NFTA_CT_HELPER_L3PROTO] = { .type = NLA_U16 },
1136 [NFTA_CT_HELPER_L4PROTO] = { .type = NLA_U8 },
1137};
1138
1139static struct nft_object_type nft_ct_helper_obj_type;
1140static const struct nft_object_ops nft_ct_helper_obj_ops = {
1141 .type = &nft_ct_helper_obj_type,
1142 .size = sizeof(struct nft_ct_helper_obj),
1143 .eval = nft_ct_helper_obj_eval,
1144 .init = nft_ct_helper_obj_init,
1145 .destroy = nft_ct_helper_obj_destroy,
1146 .dump = nft_ct_helper_obj_dump,
1147};
1148
1149static struct nft_object_type nft_ct_helper_obj_type __read_mostly = {
1150 .type = NFT_OBJECT_CT_HELPER,
1151 .ops = &nft_ct_helper_obj_ops,
1152 .maxattr = NFTA_CT_HELPER_MAX,
1153 .policy = nft_ct_helper_policy,
1154 .owner = THIS_MODULE,
1155};
1156
1157struct nft_ct_expect_obj {
1158 u16 l3num;
1159 __be16 dport;
1160 u8 l4proto;
1161 u8 size;
1162 u32 timeout;
1163};
1164
1165static int nft_ct_expect_obj_init(const struct nft_ctx *ctx,
1166 const struct nlattr * const tb[],
1167 struct nft_object *obj)
1168{
1169 struct nft_ct_expect_obj *priv = nft_obj_data(obj);
1170
1171 if (!tb[NFTA_CT_EXPECT_L4PROTO] ||
1172 !tb[NFTA_CT_EXPECT_DPORT] ||
1173 !tb[NFTA_CT_EXPECT_TIMEOUT] ||
1174 !tb[NFTA_CT_EXPECT_SIZE])
1175 return -EINVAL;
1176
1177 priv->l3num = ctx->family;
1178 if (tb[NFTA_CT_EXPECT_L3PROTO])
1179 priv->l3num = ntohs(nla_get_be16(tb[NFTA_CT_EXPECT_L3PROTO]));
1180
1181 priv->l4proto = nla_get_u8(tb[NFTA_CT_EXPECT_L4PROTO]);
1182 priv->dport = nla_get_be16(tb[NFTA_CT_EXPECT_DPORT]);
1183 priv->timeout = nla_get_u32(tb[NFTA_CT_EXPECT_TIMEOUT]);
1184 priv->size = nla_get_u8(tb[NFTA_CT_EXPECT_SIZE]);
1185
1186 return nf_ct_netns_get(ctx->net, ctx->family);
1187}
1188
1189static void nft_ct_expect_obj_destroy(const struct nft_ctx *ctx,
1190 struct nft_object *obj)
1191{
1192 nf_ct_netns_put(ctx->net, ctx->family);
1193}
1194
1195static int nft_ct_expect_obj_dump(struct sk_buff *skb,
1196 struct nft_object *obj, bool reset)
1197{
1198 const struct nft_ct_expect_obj *priv = nft_obj_data(obj);
1199
1200 if (nla_put_be16(skb, NFTA_CT_EXPECT_L3PROTO, htons(priv->l3num)) ||
1201 nla_put_u8(skb, NFTA_CT_EXPECT_L4PROTO, priv->l4proto) ||
1202 nla_put_be16(skb, NFTA_CT_EXPECT_DPORT, priv->dport) ||
1203 nla_put_u32(skb, NFTA_CT_EXPECT_TIMEOUT, priv->timeout) ||
1204 nla_put_u8(skb, NFTA_CT_EXPECT_SIZE, priv->size))
1205 return -1;
1206
1207 return 0;
1208}
1209
1210static void nft_ct_expect_obj_eval(struct nft_object *obj,
1211 struct nft_regs *regs,
1212 const struct nft_pktinfo *pkt)
1213{
1214 const struct nft_ct_expect_obj *priv = nft_obj_data(obj);
1215 struct nf_conntrack_expect *exp;
1216 enum ip_conntrack_info ctinfo;
1217 struct nf_conn_help *help;
1218 enum ip_conntrack_dir dir;
1219 u16 l3num = priv->l3num;
1220 struct nf_conn *ct;
1221
1222 ct = nf_ct_get(pkt->skb, &ctinfo);
1223 if (!ct || ctinfo == IP_CT_UNTRACKED) {
1224 regs->verdict.code = NFT_BREAK;
1225 return;
1226 }
1227 dir = CTINFO2DIR(ctinfo);
1228
1229 help = nfct_help(ct);
1230 if (!help)
1231 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
1232 if (!help) {
1233 regs->verdict.code = NF_DROP;
1234 return;
1235 }
1236
1237 if (help->expecting[NF_CT_EXPECT_CLASS_DEFAULT] >= priv->size) {
1238 regs->verdict.code = NFT_BREAK;
1239 return;
1240 }
1241 if (l3num == NFPROTO_INET)
1242 l3num = nf_ct_l3num(ct);
1243
1244 exp = nf_ct_expect_alloc(ct);
1245 if (exp == NULL) {
1246 regs->verdict.code = NF_DROP;
1247 return;
1248 }
1249 nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, l3num,
1250 &ct->tuplehash[!dir].tuple.src.u3,
1251 &ct->tuplehash[!dir].tuple.dst.u3,
1252 priv->l4proto, NULL, &priv->dport);
1253 exp->timeout.expires = jiffies + priv->timeout * HZ;
1254
1255 if (nf_ct_expect_related(exp, 0) != 0)
1256 regs->verdict.code = NF_DROP;
1257}
1258
1259static const struct nla_policy nft_ct_expect_policy[NFTA_CT_EXPECT_MAX + 1] = {
1260 [NFTA_CT_EXPECT_L3PROTO] = { .type = NLA_U16 },
1261 [NFTA_CT_EXPECT_L4PROTO] = { .type = NLA_U8 },
1262 [NFTA_CT_EXPECT_DPORT] = { .type = NLA_U16 },
1263 [NFTA_CT_EXPECT_TIMEOUT] = { .type = NLA_U32 },
1264 [NFTA_CT_EXPECT_SIZE] = { .type = NLA_U8 },
1265};
1266
1267static struct nft_object_type nft_ct_expect_obj_type;
1268
1269static const struct nft_object_ops nft_ct_expect_obj_ops = {
1270 .type = &nft_ct_expect_obj_type,
1271 .size = sizeof(struct nft_ct_expect_obj),
1272 .eval = nft_ct_expect_obj_eval,
1273 .init = nft_ct_expect_obj_init,
1274 .destroy = nft_ct_expect_obj_destroy,
1275 .dump = nft_ct_expect_obj_dump,
1276};
1277
1278static struct nft_object_type nft_ct_expect_obj_type __read_mostly = {
1279 .type = NFT_OBJECT_CT_EXPECT,
1280 .ops = &nft_ct_expect_obj_ops,
1281 .maxattr = NFTA_CT_EXPECT_MAX,
1282 .policy = nft_ct_expect_policy,
1283 .owner = THIS_MODULE,
1284};
1285
1286static int __init nft_ct_module_init(void)
1287{
1288 int err;
1289
1290 BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE > NFT_REG_SIZE);
1291
1292 err = nft_register_expr(&nft_ct_type);
1293 if (err < 0)
1294 return err;
1295
1296 err = nft_register_expr(&nft_notrack_type);
1297 if (err < 0)
1298 goto err1;
1299
1300 err = nft_register_obj(&nft_ct_helper_obj_type);
1301 if (err < 0)
1302 goto err2;
1303
1304 err = nft_register_obj(&nft_ct_expect_obj_type);
1305 if (err < 0)
1306 goto err3;
1307#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
1308 err = nft_register_obj(&nft_ct_timeout_obj_type);
1309 if (err < 0)
1310 goto err4;
1311#endif
1312 return 0;
1313
1314#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
1315err4:
1316 nft_unregister_obj(&nft_ct_expect_obj_type);
1317#endif
1318err3:
1319 nft_unregister_obj(&nft_ct_helper_obj_type);
1320err2:
1321 nft_unregister_expr(&nft_notrack_type);
1322err1:
1323 nft_unregister_expr(&nft_ct_type);
1324 return err;
1325}
1326
1327static void __exit nft_ct_module_exit(void)
1328{
1329#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
1330 nft_unregister_obj(&nft_ct_timeout_obj_type);
1331#endif
1332 nft_unregister_obj(&nft_ct_expect_obj_type);
1333 nft_unregister_obj(&nft_ct_helper_obj_type);
1334 nft_unregister_expr(&nft_notrack_type);
1335 nft_unregister_expr(&nft_ct_type);
1336}
1337
1338module_init(nft_ct_module_init);
1339module_exit(nft_ct_module_exit);
1340
1341MODULE_LICENSE("GPL");
1342MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1343MODULE_ALIAS_NFT_EXPR("ct");
1344MODULE_ALIAS_NFT_EXPR("notrack");
1345MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_HELPER);
1346MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_TIMEOUT);
1347MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_EXPECT);
1348
