1 /* Connection tracking via netlink socket. Allows for user space
2 * protocol helpers and general trouble making from userspace.
4 * (C) 2001 by Jay Schulist <jschlst@samba.org>
5 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
6 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
7 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
9 * Initial connection tracking via netlink development funded and
10 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
12 * Further development of this code funded by Astaro AG (http://www.astaro.com)
14 * This software may be used and distributed according to the terms
15 * of the GNU General Public License, incorporated herein by reference.
18 #include <linux/init.h>
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/rculist.h>
22 #include <linux/rculist_nulls.h>
23 #include <linux/types.h>
24 #include <linux/timer.h>
25 #include <linux/security.h>
26 #include <linux/skbuff.h>
27 #include <linux/errno.h>
28 #include <linux/netlink.h>
29 #include <linux/spinlock.h>
30 #include <linux/interrupt.h>
31 #include <linux/slab.h>
33 #include <linux/netfilter.h>
34 #include <net/netlink.h>
36 #include <net/netfilter/nf_conntrack.h>
37 #include <net/netfilter/nf_conntrack_core.h>
38 #include <net/netfilter/nf_conntrack_expect.h>
39 #include <net/netfilter/nf_conntrack_helper.h>
40 #include <net/netfilter/nf_conntrack_l3proto.h>
41 #include <net/netfilter/nf_conntrack_l4proto.h>
42 #include <net/netfilter/nf_conntrack_tuple.h>
43 #include <net/netfilter/nf_conntrack_acct.h>
44 #include <net/netfilter/nf_conntrack_zones.h>
45 #include <net/netfilter/nf_conntrack_timestamp.h>
46 #ifdef CONFIG_NF_NAT_NEEDED
47 #include <net/netfilter/nf_nat_core.h>
48 #include <net/netfilter/nf_nat_l4proto.h>
49 #include <net/netfilter/nf_nat_helper.h>
52 #include <linux/netfilter/nfnetlink.h>
53 #include <linux/netfilter/nfnetlink_conntrack.h>
55 MODULE_LICENSE("GPL");
57 static char __initdata version
[] = "0.93";
60 ctnetlink_dump_tuples_proto(struct sk_buff
*skb
,
61 const struct nf_conntrack_tuple
*tuple
,
62 struct nf_conntrack_l4proto
*l4proto
)
65 struct nlattr
*nest_parms
;
67 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_PROTO
| NLA_F_NESTED
);
70 if (nla_put_u8(skb
, CTA_PROTO_NUM
, tuple
->dst
.protonum
))
73 if (likely(l4proto
->tuple_to_nlattr
))
74 ret
= l4proto
->tuple_to_nlattr(skb
, tuple
);
76 nla_nest_end(skb
, nest_parms
);
85 ctnetlink_dump_tuples_ip(struct sk_buff
*skb
,
86 const struct nf_conntrack_tuple
*tuple
,
87 struct nf_conntrack_l3proto
*l3proto
)
90 struct nlattr
*nest_parms
;
92 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_IP
| NLA_F_NESTED
);
96 if (likely(l3proto
->tuple_to_nlattr
))
97 ret
= l3proto
->tuple_to_nlattr(skb
, tuple
);
99 nla_nest_end(skb
, nest_parms
);
108 ctnetlink_dump_tuples(struct sk_buff
*skb
,
109 const struct nf_conntrack_tuple
*tuple
)
112 struct nf_conntrack_l3proto
*l3proto
;
113 struct nf_conntrack_l4proto
*l4proto
;
116 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
117 ret
= ctnetlink_dump_tuples_ip(skb
, tuple
, l3proto
);
120 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
,
121 tuple
->dst
.protonum
);
122 ret
= ctnetlink_dump_tuples_proto(skb
, tuple
, l4proto
);
129 ctnetlink_dump_status(struct sk_buff
*skb
, const struct nf_conn
*ct
)
131 if (nla_put_be32(skb
, CTA_STATUS
, htonl(ct
->status
)))
132 goto nla_put_failure
;
140 ctnetlink_dump_timeout(struct sk_buff
*skb
, const struct nf_conn
*ct
)
142 long timeout
= ((long)ct
->timeout
.expires
- (long)jiffies
) / HZ
;
147 if (nla_put_be32(skb
, CTA_TIMEOUT
, htonl(timeout
)))
148 goto nla_put_failure
;
156 ctnetlink_dump_protoinfo(struct sk_buff
*skb
, struct nf_conn
*ct
)
158 struct nf_conntrack_l4proto
*l4proto
;
159 struct nlattr
*nest_proto
;
162 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
163 if (!l4proto
->to_nlattr
)
166 nest_proto
= nla_nest_start(skb
, CTA_PROTOINFO
| NLA_F_NESTED
);
168 goto nla_put_failure
;
170 ret
= l4proto
->to_nlattr(skb
, nest_proto
, ct
);
172 nla_nest_end(skb
, nest_proto
);
181 ctnetlink_dump_helpinfo(struct sk_buff
*skb
, const struct nf_conn
*ct
)
183 struct nlattr
*nest_helper
;
184 const struct nf_conn_help
*help
= nfct_help(ct
);
185 struct nf_conntrack_helper
*helper
;
190 helper
= rcu_dereference(help
->helper
);
194 nest_helper
= nla_nest_start(skb
, CTA_HELP
| NLA_F_NESTED
);
196 goto nla_put_failure
;
197 if (nla_put_string(skb
, CTA_HELP_NAME
, helper
->name
))
198 goto nla_put_failure
;
200 if (helper
->to_nlattr
)
201 helper
->to_nlattr(skb
, ct
);
203 nla_nest_end(skb
, nest_helper
);
212 dump_counters(struct sk_buff
*skb
, u64 pkts
, u64 bytes
,
213 enum ip_conntrack_dir dir
)
215 enum ctattr_type type
= dir
? CTA_COUNTERS_REPLY
: CTA_COUNTERS_ORIG
;
216 struct nlattr
*nest_count
;
218 nest_count
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
220 goto nla_put_failure
;
222 if (nla_put_be64(skb
, CTA_COUNTERS_PACKETS
, cpu_to_be64(pkts
)) ||
223 nla_put_be64(skb
, CTA_COUNTERS_BYTES
, cpu_to_be64(bytes
)))
224 goto nla_put_failure
;
226 nla_nest_end(skb
, nest_count
);
235 ctnetlink_dump_counters(struct sk_buff
*skb
, const struct nf_conn
*ct
,
236 enum ip_conntrack_dir dir
, int type
)
238 struct nf_conn_counter
*acct
;
241 acct
= nf_conn_acct_find(ct
);
245 if (type
== IPCTNL_MSG_CT_GET_CTRZERO
) {
246 pkts
= atomic64_xchg(&acct
[dir
].packets
, 0);
247 bytes
= atomic64_xchg(&acct
[dir
].bytes
, 0);
249 pkts
= atomic64_read(&acct
[dir
].packets
);
250 bytes
= atomic64_read(&acct
[dir
].bytes
);
252 return dump_counters(skb
, pkts
, bytes
, dir
);
256 ctnetlink_dump_timestamp(struct sk_buff
*skb
, const struct nf_conn
*ct
)
258 struct nlattr
*nest_count
;
259 const struct nf_conn_tstamp
*tstamp
;
261 tstamp
= nf_conn_tstamp_find(ct
);
265 nest_count
= nla_nest_start(skb
, CTA_TIMESTAMP
| NLA_F_NESTED
);
267 goto nla_put_failure
;
269 if (nla_put_be64(skb
, CTA_TIMESTAMP_START
, cpu_to_be64(tstamp
->start
)) ||
270 (tstamp
->stop
!= 0 && nla_put_be64(skb
, CTA_TIMESTAMP_STOP
,
271 cpu_to_be64(tstamp
->stop
))))
272 goto nla_put_failure
;
273 nla_nest_end(skb
, nest_count
);
281 #ifdef CONFIG_NF_CONNTRACK_MARK
283 ctnetlink_dump_mark(struct sk_buff
*skb
, const struct nf_conn
*ct
)
285 if (nla_put_be32(skb
, CTA_MARK
, htonl(ct
->mark
)))
286 goto nla_put_failure
;
293 #define ctnetlink_dump_mark(a, b) (0)
296 #ifdef CONFIG_NF_CONNTRACK_SECMARK
298 ctnetlink_dump_secctx(struct sk_buff
*skb
, const struct nf_conn
*ct
)
300 struct nlattr
*nest_secctx
;
304 ret
= security_secid_to_secctx(ct
->secmark
, &secctx
, &len
);
309 nest_secctx
= nla_nest_start(skb
, CTA_SECCTX
| NLA_F_NESTED
);
311 goto nla_put_failure
;
313 if (nla_put_string(skb
, CTA_SECCTX_NAME
, secctx
))
314 goto nla_put_failure
;
315 nla_nest_end(skb
, nest_secctx
);
319 security_release_secctx(secctx
, len
);
323 #define ctnetlink_dump_secctx(a, b) (0)
326 #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
329 ctnetlink_dump_master(struct sk_buff
*skb
, const struct nf_conn
*ct
)
331 struct nlattr
*nest_parms
;
333 if (!(ct
->status
& IPS_EXPECTED
))
336 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_MASTER
| NLA_F_NESTED
);
338 goto nla_put_failure
;
339 if (ctnetlink_dump_tuples(skb
, master_tuple(ct
)) < 0)
340 goto nla_put_failure
;
341 nla_nest_end(skb
, nest_parms
);
349 #ifdef CONFIG_NF_NAT_NEEDED
351 dump_nat_seq_adj(struct sk_buff
*skb
, const struct nf_nat_seq
*natseq
, int type
)
353 struct nlattr
*nest_parms
;
355 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
357 goto nla_put_failure
;
359 if (nla_put_be32(skb
, CTA_NAT_SEQ_CORRECTION_POS
,
360 htonl(natseq
->correction_pos
)) ||
361 nla_put_be32(skb
, CTA_NAT_SEQ_OFFSET_BEFORE
,
362 htonl(natseq
->offset_before
)) ||
363 nla_put_be32(skb
, CTA_NAT_SEQ_OFFSET_AFTER
,
364 htonl(natseq
->offset_after
)))
365 goto nla_put_failure
;
367 nla_nest_end(skb
, nest_parms
);
376 ctnetlink_dump_nat_seq_adj(struct sk_buff
*skb
, const struct nf_conn
*ct
)
378 struct nf_nat_seq
*natseq
;
379 struct nf_conn_nat
*nat
= nfct_nat(ct
);
381 if (!(ct
->status
& IPS_SEQ_ADJUST
) || !nat
)
384 natseq
= &nat
->seq
[IP_CT_DIR_ORIGINAL
];
385 if (dump_nat_seq_adj(skb
, natseq
, CTA_NAT_SEQ_ADJ_ORIG
) == -1)
388 natseq
= &nat
->seq
[IP_CT_DIR_REPLY
];
389 if (dump_nat_seq_adj(skb
, natseq
, CTA_NAT_SEQ_ADJ_REPLY
) == -1)
395 #define ctnetlink_dump_nat_seq_adj(a, b) (0)
399 ctnetlink_dump_id(struct sk_buff
*skb
, const struct nf_conn
*ct
)
401 if (nla_put_be32(skb
, CTA_ID
, htonl((unsigned long)ct
)))
402 goto nla_put_failure
;
410 ctnetlink_dump_use(struct sk_buff
*skb
, const struct nf_conn
*ct
)
412 if (nla_put_be32(skb
, CTA_USE
, htonl(atomic_read(&ct
->ct_general
.use
))))
413 goto nla_put_failure
;
421 ctnetlink_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
424 struct nlmsghdr
*nlh
;
425 struct nfgenmsg
*nfmsg
;
426 struct nlattr
*nest_parms
;
427 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
429 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_NEW
);
430 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
434 nfmsg
= nlmsg_data(nlh
);
435 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
436 nfmsg
->version
= NFNETLINK_V0
;
439 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
441 goto nla_put_failure
;
442 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
443 goto nla_put_failure
;
444 nla_nest_end(skb
, nest_parms
);
446 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
448 goto nla_put_failure
;
449 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
450 goto nla_put_failure
;
451 nla_nest_end(skb
, nest_parms
);
453 if (nf_ct_zone(ct
) &&
454 nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
455 goto nla_put_failure
;
457 if (ctnetlink_dump_status(skb
, ct
) < 0 ||
458 ctnetlink_dump_timeout(skb
, ct
) < 0 ||
459 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_ORIGINAL
, type
) < 0 ||
460 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_REPLY
, type
) < 0 ||
461 ctnetlink_dump_timestamp(skb
, ct
) < 0 ||
462 ctnetlink_dump_protoinfo(skb
, ct
) < 0 ||
463 ctnetlink_dump_helpinfo(skb
, ct
) < 0 ||
464 ctnetlink_dump_mark(skb
, ct
) < 0 ||
465 ctnetlink_dump_secctx(skb
, ct
) < 0 ||
466 ctnetlink_dump_id(skb
, ct
) < 0 ||
467 ctnetlink_dump_use(skb
, ct
) < 0 ||
468 ctnetlink_dump_master(skb
, ct
) < 0 ||
469 ctnetlink_dump_nat_seq_adj(skb
, ct
) < 0)
470 goto nla_put_failure
;
477 nlmsg_cancel(skb
, nlh
);
482 ctnetlink_proto_size(const struct nf_conn
*ct
)
484 struct nf_conntrack_l3proto
*l3proto
;
485 struct nf_conntrack_l4proto
*l4proto
;
489 l3proto
= __nf_ct_l3proto_find(nf_ct_l3num(ct
));
490 len
+= l3proto
->nla_size
;
492 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
493 len
+= l4proto
->nla_size
;
500 ctnetlink_counters_size(const struct nf_conn
*ct
)
502 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_ACCT
))
504 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
505 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
506 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
511 ctnetlink_secctx_size(const struct nf_conn
*ct
)
513 #ifdef CONFIG_NF_CONNTRACK_SECMARK
516 ret
= security_secid_to_secctx(ct
->secmark
, NULL
, &len
);
520 return nla_total_size(0) /* CTA_SECCTX */
521 + nla_total_size(sizeof(char) * len
); /* CTA_SECCTX_NAME */
528 ctnetlink_timestamp_size(const struct nf_conn
*ct
)
530 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
531 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_TSTAMP
))
533 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
540 ctnetlink_nlmsg_size(const struct nf_conn
*ct
)
542 return NLMSG_ALIGN(sizeof(struct nfgenmsg
))
543 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
544 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
545 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
546 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
547 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
548 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
549 + ctnetlink_counters_size(ct
)
550 + ctnetlink_timestamp_size(ct
)
551 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
552 + nla_total_size(0) /* CTA_PROTOINFO */
553 + nla_total_size(0) /* CTA_HELP */
554 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
555 + ctnetlink_secctx_size(ct
)
556 #ifdef CONFIG_NF_NAT_NEEDED
557 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
558 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
560 #ifdef CONFIG_NF_CONNTRACK_MARK
561 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
563 + ctnetlink_proto_size(ct
)
567 #ifdef CONFIG_NF_CONNTRACK_EVENTS
569 ctnetlink_conntrack_event(unsigned int events
, struct nf_ct_event
*item
)
572 struct nlmsghdr
*nlh
;
573 struct nfgenmsg
*nfmsg
;
574 struct nlattr
*nest_parms
;
575 struct nf_conn
*ct
= item
->ct
;
578 unsigned int flags
= 0, group
;
581 /* ignore our fake conntrack entry */
582 if (nf_ct_is_untracked(ct
))
585 if (events
& (1 << IPCT_DESTROY
)) {
586 type
= IPCTNL_MSG_CT_DELETE
;
587 group
= NFNLGRP_CONNTRACK_DESTROY
;
588 } else if (events
& ((1 << IPCT_NEW
) | (1 << IPCT_RELATED
))) {
589 type
= IPCTNL_MSG_CT_NEW
;
590 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
591 group
= NFNLGRP_CONNTRACK_NEW
;
593 type
= IPCTNL_MSG_CT_NEW
;
594 group
= NFNLGRP_CONNTRACK_UPDATE
;
599 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
602 skb
= nlmsg_new(ctnetlink_nlmsg_size(ct
), GFP_ATOMIC
);
606 type
|= NFNL_SUBSYS_CTNETLINK
<< 8;
607 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
611 nfmsg
= nlmsg_data(nlh
);
612 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
613 nfmsg
->version
= NFNETLINK_V0
;
617 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
619 goto nla_put_failure
;
620 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
621 goto nla_put_failure
;
622 nla_nest_end(skb
, nest_parms
);
624 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
626 goto nla_put_failure
;
627 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
628 goto nla_put_failure
;
629 nla_nest_end(skb
, nest_parms
);
631 if (nf_ct_zone(ct
) &&
632 nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
633 goto nla_put_failure
;
635 if (ctnetlink_dump_id(skb
, ct
) < 0)
636 goto nla_put_failure
;
638 if (ctnetlink_dump_status(skb
, ct
) < 0)
639 goto nla_put_failure
;
641 if (events
& (1 << IPCT_DESTROY
)) {
642 if (ctnetlink_dump_counters(skb
, ct
,
643 IP_CT_DIR_ORIGINAL
, type
) < 0 ||
644 ctnetlink_dump_counters(skb
, ct
,
645 IP_CT_DIR_REPLY
, type
) < 0 ||
646 ctnetlink_dump_timestamp(skb
, ct
) < 0)
647 goto nla_put_failure
;
649 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
650 goto nla_put_failure
;
652 if (events
& (1 << IPCT_PROTOINFO
)
653 && ctnetlink_dump_protoinfo(skb
, ct
) < 0)
654 goto nla_put_failure
;
656 if ((events
& (1 << IPCT_HELPER
) || nfct_help(ct
))
657 && ctnetlink_dump_helpinfo(skb
, ct
) < 0)
658 goto nla_put_failure
;
660 #ifdef CONFIG_NF_CONNTRACK_SECMARK
661 if ((events
& (1 << IPCT_SECMARK
) || ct
->secmark
)
662 && ctnetlink_dump_secctx(skb
, ct
) < 0)
663 goto nla_put_failure
;
666 if (events
& (1 << IPCT_RELATED
) &&
667 ctnetlink_dump_master(skb
, ct
) < 0)
668 goto nla_put_failure
;
670 if (events
& (1 << IPCT_NATSEQADJ
) &&
671 ctnetlink_dump_nat_seq_adj(skb
, ct
) < 0)
672 goto nla_put_failure
;
675 #ifdef CONFIG_NF_CONNTRACK_MARK
676 if ((events
& (1 << IPCT_MARK
) || ct
->mark
)
677 && ctnetlink_dump_mark(skb
, ct
) < 0)
678 goto nla_put_failure
;
683 err
= nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
,
685 if (err
== -ENOBUFS
|| err
== -EAGAIN
)
692 nlmsg_cancel(skb
, nlh
);
696 if (nfnetlink_set_err(net
, 0, group
, -ENOBUFS
) > 0)
701 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
703 static int ctnetlink_done(struct netlink_callback
*cb
)
706 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
712 struct ctnetlink_dump_filter
{
720 ctnetlink_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
722 struct net
*net
= sock_net(skb
->sk
);
723 struct nf_conn
*ct
, *last
;
724 struct nf_conntrack_tuple_hash
*h
;
725 struct hlist_nulls_node
*n
;
726 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
727 u_int8_t l3proto
= nfmsg
->nfgen_family
;
729 #ifdef CONFIG_NF_CONNTRACK_MARK
730 const struct ctnetlink_dump_filter
*filter
= cb
->data
;
733 spin_lock_bh(&nf_conntrack_lock
);
734 last
= (struct nf_conn
*)cb
->args
[1];
735 for (; cb
->args
[0] < net
->ct
.htable_size
; cb
->args
[0]++) {
737 hlist_nulls_for_each_entry(h
, n
, &net
->ct
.hash
[cb
->args
[0]],
739 if (NF_CT_DIRECTION(h
) != IP_CT_DIR_ORIGINAL
)
741 ct
= nf_ct_tuplehash_to_ctrack(h
);
742 /* Dump entries of a given L3 protocol number.
743 * If it is not specified, ie. l3proto == 0,
744 * then dump everything. */
745 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
752 #ifdef CONFIG_NF_CONNTRACK_MARK
753 if (filter
&& !((ct
->mark
& filter
->mark
.mask
) ==
760 ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
762 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
766 nf_conntrack_get(&ct
->ct_general
);
767 cb
->args
[1] = (unsigned long)ct
;
777 spin_unlock_bh(&nf_conntrack_lock
);
785 ctnetlink_parse_tuple_ip(struct nlattr
*attr
, struct nf_conntrack_tuple
*tuple
)
787 struct nlattr
*tb
[CTA_IP_MAX
+1];
788 struct nf_conntrack_l3proto
*l3proto
;
791 nla_parse_nested(tb
, CTA_IP_MAX
, attr
, NULL
);
794 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
796 if (likely(l3proto
->nlattr_to_tuple
)) {
797 ret
= nla_validate_nested(attr
, CTA_IP_MAX
,
798 l3proto
->nla_policy
);
800 ret
= l3proto
->nlattr_to_tuple(tb
, tuple
);
808 static const struct nla_policy proto_nla_policy
[CTA_PROTO_MAX
+1] = {
809 [CTA_PROTO_NUM
] = { .type
= NLA_U8
},
813 ctnetlink_parse_tuple_proto(struct nlattr
*attr
,
814 struct nf_conntrack_tuple
*tuple
)
816 struct nlattr
*tb
[CTA_PROTO_MAX
+1];
817 struct nf_conntrack_l4proto
*l4proto
;
820 ret
= nla_parse_nested(tb
, CTA_PROTO_MAX
, attr
, proto_nla_policy
);
824 if (!tb
[CTA_PROTO_NUM
])
826 tuple
->dst
.protonum
= nla_get_u8(tb
[CTA_PROTO_NUM
]);
829 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
, tuple
->dst
.protonum
);
831 if (likely(l4proto
->nlattr_to_tuple
)) {
832 ret
= nla_validate_nested(attr
, CTA_PROTO_MAX
,
833 l4proto
->nla_policy
);
835 ret
= l4proto
->nlattr_to_tuple(tb
, tuple
);
843 static const struct nla_policy tuple_nla_policy
[CTA_TUPLE_MAX
+1] = {
844 [CTA_TUPLE_IP
] = { .type
= NLA_NESTED
},
845 [CTA_TUPLE_PROTO
] = { .type
= NLA_NESTED
},
849 ctnetlink_parse_tuple(const struct nlattr
* const cda
[],
850 struct nf_conntrack_tuple
*tuple
,
851 enum ctattr_type type
, u_int8_t l3num
)
853 struct nlattr
*tb
[CTA_TUPLE_MAX
+1];
856 memset(tuple
, 0, sizeof(*tuple
));
858 nla_parse_nested(tb
, CTA_TUPLE_MAX
, cda
[type
], tuple_nla_policy
);
860 if (!tb
[CTA_TUPLE_IP
])
863 tuple
->src
.l3num
= l3num
;
865 err
= ctnetlink_parse_tuple_ip(tb
[CTA_TUPLE_IP
], tuple
);
869 if (!tb
[CTA_TUPLE_PROTO
])
872 err
= ctnetlink_parse_tuple_proto(tb
[CTA_TUPLE_PROTO
], tuple
);
876 /* orig and expect tuples get DIR_ORIGINAL */
877 if (type
== CTA_TUPLE_REPLY
)
878 tuple
->dst
.dir
= IP_CT_DIR_REPLY
;
880 tuple
->dst
.dir
= IP_CT_DIR_ORIGINAL
;
886 ctnetlink_parse_zone(const struct nlattr
*attr
, u16
*zone
)
889 #ifdef CONFIG_NF_CONNTRACK_ZONES
890 *zone
= ntohs(nla_get_be16(attr
));
900 static const struct nla_policy help_nla_policy
[CTA_HELP_MAX
+1] = {
901 [CTA_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
902 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
906 ctnetlink_parse_help(const struct nlattr
*attr
, char **helper_name
,
907 struct nlattr
**helpinfo
)
909 struct nlattr
*tb
[CTA_HELP_MAX
+1];
911 nla_parse_nested(tb
, CTA_HELP_MAX
, attr
, help_nla_policy
);
913 if (!tb
[CTA_HELP_NAME
])
916 *helper_name
= nla_data(tb
[CTA_HELP_NAME
]);
918 if (tb
[CTA_HELP_INFO
])
919 *helpinfo
= tb
[CTA_HELP_INFO
];
924 static const struct nla_policy ct_nla_policy
[CTA_MAX
+1] = {
925 [CTA_TUPLE_ORIG
] = { .type
= NLA_NESTED
},
926 [CTA_TUPLE_REPLY
] = { .type
= NLA_NESTED
},
927 [CTA_STATUS
] = { .type
= NLA_U32
},
928 [CTA_PROTOINFO
] = { .type
= NLA_NESTED
},
929 [CTA_HELP
] = { .type
= NLA_NESTED
},
930 [CTA_NAT_SRC
] = { .type
= NLA_NESTED
},
931 [CTA_TIMEOUT
] = { .type
= NLA_U32
},
932 [CTA_MARK
] = { .type
= NLA_U32
},
933 [CTA_ID
] = { .type
= NLA_U32
},
934 [CTA_NAT_DST
] = { .type
= NLA_NESTED
},
935 [CTA_TUPLE_MASTER
] = { .type
= NLA_NESTED
},
936 [CTA_NAT_SEQ_ADJ_ORIG
] = { .type
= NLA_NESTED
},
937 [CTA_NAT_SEQ_ADJ_REPLY
] = { .type
= NLA_NESTED
},
938 [CTA_ZONE
] = { .type
= NLA_U16
},
939 [CTA_MARK_MASK
] = { .type
= NLA_U32
},
943 ctnetlink_del_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
944 const struct nlmsghdr
*nlh
,
945 const struct nlattr
* const cda
[])
947 struct net
*net
= sock_net(ctnl
);
948 struct nf_conntrack_tuple_hash
*h
;
949 struct nf_conntrack_tuple tuple
;
951 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
952 u_int8_t u3
= nfmsg
->nfgen_family
;
956 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
960 if (cda
[CTA_TUPLE_ORIG
])
961 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
962 else if (cda
[CTA_TUPLE_REPLY
])
963 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
965 /* Flush the whole table */
966 nf_conntrack_flush_report(net
,
967 NETLINK_CB(skb
).portid
,
975 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
979 ct
= nf_ct_tuplehash_to_ctrack(h
);
982 u_int32_t id
= ntohl(nla_get_be32(cda
[CTA_ID
]));
983 if (id
!= (u32
)(unsigned long)ct
) {
989 if (del_timer(&ct
->timeout
)) {
990 if (nf_conntrack_event_report(IPCT_DESTROY
, ct
,
991 NETLINK_CB(skb
).portid
,
992 nlmsg_report(nlh
)) < 0) {
993 nf_ct_delete_from_lists(ct
);
994 /* we failed to report the event, try later */
995 nf_ct_dying_timeout(ct
);
999 /* death_by_timeout would report the event again */
1000 set_bit(IPS_DYING_BIT
, &ct
->status
);
1001 nf_ct_delete_from_lists(ct
);
1010 ctnetlink_get_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1011 const struct nlmsghdr
*nlh
,
1012 const struct nlattr
* const cda
[])
1014 struct net
*net
= sock_net(ctnl
);
1015 struct nf_conntrack_tuple_hash
*h
;
1016 struct nf_conntrack_tuple tuple
;
1018 struct sk_buff
*skb2
= NULL
;
1019 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1020 u_int8_t u3
= nfmsg
->nfgen_family
;
1024 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1025 struct netlink_dump_control c
= {
1026 .dump
= ctnetlink_dump_table
,
1027 .done
= ctnetlink_done
,
1029 #ifdef CONFIG_NF_CONNTRACK_MARK
1030 if (cda
[CTA_MARK
] && cda
[CTA_MARK_MASK
]) {
1031 struct ctnetlink_dump_filter
*filter
;
1033 filter
= kzalloc(sizeof(struct ctnetlink_dump_filter
),
1038 filter
->mark
.val
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1040 ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
1044 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1047 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1051 if (cda
[CTA_TUPLE_ORIG
])
1052 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
1053 else if (cda
[CTA_TUPLE_REPLY
])
1054 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
1061 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
1065 ct
= nf_ct_tuplehash_to_ctrack(h
);
1068 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1075 err
= ctnetlink_fill_info(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
,
1076 NFNL_MSG_TYPE(nlh
->nlmsg_type
), ct
);
1082 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1091 /* this avoids a loop in nfnetlink. */
1092 return err
== -EAGAIN
? -ENOBUFS
: err
;
1095 static int ctnetlink_done_list(struct netlink_callback
*cb
)
1098 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
1103 ctnetlink_dump_list(struct sk_buff
*skb
, struct netlink_callback
*cb
,
1104 struct hlist_nulls_head
*list
)
1106 struct nf_conn
*ct
, *last
;
1107 struct nf_conntrack_tuple_hash
*h
;
1108 struct hlist_nulls_node
*n
;
1109 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
1110 u_int8_t l3proto
= nfmsg
->nfgen_family
;
1116 spin_lock_bh(&nf_conntrack_lock
);
1117 last
= (struct nf_conn
*)cb
->args
[1];
1119 hlist_nulls_for_each_entry(h
, n
, list
, hnnode
) {
1120 ct
= nf_ct_tuplehash_to_ctrack(h
);
1121 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
1129 res
= ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
1131 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
1135 nf_conntrack_get(&ct
->ct_general
);
1136 cb
->args
[1] = (unsigned long)ct
;
1146 spin_unlock_bh(&nf_conntrack_lock
);
1154 ctnetlink_dump_dying(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1156 struct net
*net
= sock_net(skb
->sk
);
1158 return ctnetlink_dump_list(skb
, cb
, &net
->ct
.dying
);
1162 ctnetlink_get_ct_dying(struct sock
*ctnl
, struct sk_buff
*skb
,
1163 const struct nlmsghdr
*nlh
,
1164 const struct nlattr
* const cda
[])
1166 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1167 struct netlink_dump_control c
= {
1168 .dump
= ctnetlink_dump_dying
,
1169 .done
= ctnetlink_done_list
,
1171 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1178 ctnetlink_dump_unconfirmed(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1180 struct net
*net
= sock_net(skb
->sk
);
1182 return ctnetlink_dump_list(skb
, cb
, &net
->ct
.unconfirmed
);
1186 ctnetlink_get_ct_unconfirmed(struct sock
*ctnl
, struct sk_buff
*skb
,
1187 const struct nlmsghdr
*nlh
,
1188 const struct nlattr
* const cda
[])
1190 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1191 struct netlink_dump_control c
= {
1192 .dump
= ctnetlink_dump_unconfirmed
,
1193 .done
= ctnetlink_done_list
,
1195 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1201 #ifdef CONFIG_NF_NAT_NEEDED
1203 ctnetlink_parse_nat_setup(struct nf_conn
*ct
,
1204 enum nf_nat_manip_type manip
,
1205 const struct nlattr
*attr
)
1207 typeof(nfnetlink_parse_nat_setup_hook
) parse_nat_setup
;
1210 parse_nat_setup
= rcu_dereference(nfnetlink_parse_nat_setup_hook
);
1211 if (!parse_nat_setup
) {
1212 #ifdef CONFIG_MODULES
1215 if (request_module("nf-nat") < 0) {
1222 if (nfnetlink_parse_nat_setup_hook
)
1228 err
= parse_nat_setup(ct
, manip
, attr
);
1229 if (err
== -EAGAIN
) {
1230 #ifdef CONFIG_MODULES
1233 if (request_module("nf-nat-%u", nf_ct_l3num(ct
)) < 0) {
1249 ctnetlink_change_status(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1252 unsigned int status
= ntohl(nla_get_be32(cda
[CTA_STATUS
]));
1253 d
= ct
->status
^ status
;
1255 if (d
& (IPS_EXPECTED
|IPS_CONFIRMED
|IPS_DYING
))
1259 if (d
& IPS_SEEN_REPLY
&& !(status
& IPS_SEEN_REPLY
))
1260 /* SEEN_REPLY bit can only be set */
1263 if (d
& IPS_ASSURED
&& !(status
& IPS_ASSURED
))
1264 /* ASSURED bit can only be set */
1267 /* Be careful here, modifying NAT bits can screw up things,
1268 * so don't let users modify them directly if they don't pass
1270 ct
->status
|= status
& ~(IPS_NAT_DONE_MASK
| IPS_NAT_MASK
);
1275 ctnetlink_change_nat(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1277 #ifdef CONFIG_NF_NAT_NEEDED
1280 if (cda
[CTA_NAT_DST
]) {
1281 ret
= ctnetlink_parse_nat_setup(ct
,
1287 if (cda
[CTA_NAT_SRC
]) {
1288 ret
= ctnetlink_parse_nat_setup(ct
,
1301 ctnetlink_change_helper(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1303 struct nf_conntrack_helper
*helper
;
1304 struct nf_conn_help
*help
= nfct_help(ct
);
1305 char *helpname
= NULL
;
1306 struct nlattr
*helpinfo
= NULL
;
1309 /* don't change helper of sibling connections */
1313 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1317 if (!strcmp(helpname
, "")) {
1318 if (help
&& help
->helper
) {
1319 /* we had a helper before ... */
1320 nf_ct_remove_expectations(ct
);
1321 RCU_INIT_POINTER(help
->helper
, NULL
);
1327 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1328 nf_ct_protonum(ct
));
1329 if (helper
== NULL
) {
1330 #ifdef CONFIG_MODULES
1331 spin_unlock_bh(&nf_conntrack_lock
);
1333 if (request_module("nfct-helper-%s", helpname
) < 0) {
1334 spin_lock_bh(&nf_conntrack_lock
);
1338 spin_lock_bh(&nf_conntrack_lock
);
1339 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1340 nf_ct_protonum(ct
));
1348 if (help
->helper
== helper
) {
1349 /* update private helper data if allowed. */
1350 if (helper
->from_nlattr
)
1351 helper
->from_nlattr(helpinfo
, ct
);
1357 /* we cannot set a helper for an existing conntrack */
1362 ctnetlink_change_timeout(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1364 u_int32_t timeout
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1366 if (!del_timer(&ct
->timeout
))
1369 ct
->timeout
.expires
= jiffies
+ timeout
* HZ
;
1370 add_timer(&ct
->timeout
);
1375 static const struct nla_policy protoinfo_policy
[CTA_PROTOINFO_MAX
+1] = {
1376 [CTA_PROTOINFO_TCP
] = { .type
= NLA_NESTED
},
1377 [CTA_PROTOINFO_DCCP
] = { .type
= NLA_NESTED
},
1378 [CTA_PROTOINFO_SCTP
] = { .type
= NLA_NESTED
},
1382 ctnetlink_change_protoinfo(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1384 const struct nlattr
*attr
= cda
[CTA_PROTOINFO
];
1385 struct nlattr
*tb
[CTA_PROTOINFO_MAX
+1];
1386 struct nf_conntrack_l4proto
*l4proto
;
1389 nla_parse_nested(tb
, CTA_PROTOINFO_MAX
, attr
, protoinfo_policy
);
1392 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
1393 if (l4proto
->from_nlattr
)
1394 err
= l4proto
->from_nlattr(tb
, ct
);
1400 #ifdef CONFIG_NF_NAT_NEEDED
1401 static const struct nla_policy nat_seq_policy
[CTA_NAT_SEQ_MAX
+1] = {
1402 [CTA_NAT_SEQ_CORRECTION_POS
] = { .type
= NLA_U32
},
1403 [CTA_NAT_SEQ_OFFSET_BEFORE
] = { .type
= NLA_U32
},
1404 [CTA_NAT_SEQ_OFFSET_AFTER
] = { .type
= NLA_U32
},
1408 change_nat_seq_adj(struct nf_nat_seq
*natseq
, const struct nlattr
* const attr
)
1410 struct nlattr
*cda
[CTA_NAT_SEQ_MAX
+1];
1412 nla_parse_nested(cda
, CTA_NAT_SEQ_MAX
, attr
, nat_seq_policy
);
1414 if (!cda
[CTA_NAT_SEQ_CORRECTION_POS
])
1417 natseq
->correction_pos
=
1418 ntohl(nla_get_be32(cda
[CTA_NAT_SEQ_CORRECTION_POS
]));
1420 if (!cda
[CTA_NAT_SEQ_OFFSET_BEFORE
])
1423 natseq
->offset_before
=
1424 ntohl(nla_get_be32(cda
[CTA_NAT_SEQ_OFFSET_BEFORE
]));
1426 if (!cda
[CTA_NAT_SEQ_OFFSET_AFTER
])
1429 natseq
->offset_after
=
1430 ntohl(nla_get_be32(cda
[CTA_NAT_SEQ_OFFSET_AFTER
]));
1436 ctnetlink_change_nat_seq_adj(struct nf_conn
*ct
,
1437 const struct nlattr
* const cda
[])
1440 struct nf_conn_nat
*nat
= nfct_nat(ct
);
1445 if (cda
[CTA_NAT_SEQ_ADJ_ORIG
]) {
1446 ret
= change_nat_seq_adj(&nat
->seq
[IP_CT_DIR_ORIGINAL
],
1447 cda
[CTA_NAT_SEQ_ADJ_ORIG
]);
1451 ct
->status
|= IPS_SEQ_ADJUST
;
1454 if (cda
[CTA_NAT_SEQ_ADJ_REPLY
]) {
1455 ret
= change_nat_seq_adj(&nat
->seq
[IP_CT_DIR_REPLY
],
1456 cda
[CTA_NAT_SEQ_ADJ_REPLY
]);
1460 ct
->status
|= IPS_SEQ_ADJUST
;
1468 ctnetlink_change_conntrack(struct nf_conn
*ct
,
1469 const struct nlattr
* const cda
[])
1473 /* only allow NAT changes and master assignation for new conntracks */
1474 if (cda
[CTA_NAT_SRC
] || cda
[CTA_NAT_DST
] || cda
[CTA_TUPLE_MASTER
])
1477 if (cda
[CTA_HELP
]) {
1478 err
= ctnetlink_change_helper(ct
, cda
);
1483 if (cda
[CTA_TIMEOUT
]) {
1484 err
= ctnetlink_change_timeout(ct
, cda
);
1489 if (cda
[CTA_STATUS
]) {
1490 err
= ctnetlink_change_status(ct
, cda
);
1495 if (cda
[CTA_PROTOINFO
]) {
1496 err
= ctnetlink_change_protoinfo(ct
, cda
);
1501 #if defined(CONFIG_NF_CONNTRACK_MARK)
1503 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1506 #ifdef CONFIG_NF_NAT_NEEDED
1507 if (cda
[CTA_NAT_SEQ_ADJ_ORIG
] || cda
[CTA_NAT_SEQ_ADJ_REPLY
]) {
1508 err
= ctnetlink_change_nat_seq_adj(ct
, cda
);
1517 static struct nf_conn
*
1518 ctnetlink_create_conntrack(struct net
*net
, u16 zone
,
1519 const struct nlattr
* const cda
[],
1520 struct nf_conntrack_tuple
*otuple
,
1521 struct nf_conntrack_tuple
*rtuple
,
1526 struct nf_conntrack_helper
*helper
;
1527 struct nf_conn_tstamp
*tstamp
;
1529 ct
= nf_conntrack_alloc(net
, zone
, otuple
, rtuple
, GFP_ATOMIC
);
1531 return ERR_PTR(-ENOMEM
);
1533 if (!cda
[CTA_TIMEOUT
])
1535 ct
->timeout
.expires
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1537 ct
->timeout
.expires
= jiffies
+ ct
->timeout
.expires
* HZ
;
1540 if (cda
[CTA_HELP
]) {
1541 char *helpname
= NULL
;
1542 struct nlattr
*helpinfo
= NULL
;
1544 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1548 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1549 nf_ct_protonum(ct
));
1550 if (helper
== NULL
) {
1552 #ifdef CONFIG_MODULES
1553 if (request_module("nfct-helper-%s", helpname
) < 0) {
1559 helper
= __nf_conntrack_helper_find(helpname
,
1561 nf_ct_protonum(ct
));
1571 struct nf_conn_help
*help
;
1573 help
= nf_ct_helper_ext_add(ct
, helper
, GFP_ATOMIC
);
1578 /* set private helper data if allowed. */
1579 if (helper
->from_nlattr
)
1580 helper
->from_nlattr(helpinfo
, ct
);
1582 /* not in hash table yet so not strictly necessary */
1583 RCU_INIT_POINTER(help
->helper
, helper
);
1586 /* try an implicit helper assignation */
1587 err
= __nf_ct_try_assign_helper(ct
, NULL
, GFP_ATOMIC
);
1592 if (cda
[CTA_NAT_SRC
] || cda
[CTA_NAT_DST
]) {
1593 err
= ctnetlink_change_nat(ct
, cda
);
1598 nf_ct_acct_ext_add(ct
, GFP_ATOMIC
);
1599 nf_ct_tstamp_ext_add(ct
, GFP_ATOMIC
);
1600 nf_ct_ecache_ext_add(ct
, 0, 0, GFP_ATOMIC
);
1601 /* we must add conntrack extensions before confirmation. */
1602 ct
->status
|= IPS_CONFIRMED
;
1604 if (cda
[CTA_STATUS
]) {
1605 err
= ctnetlink_change_status(ct
, cda
);
1610 #ifdef CONFIG_NF_NAT_NEEDED
1611 if (cda
[CTA_NAT_SEQ_ADJ_ORIG
] || cda
[CTA_NAT_SEQ_ADJ_REPLY
]) {
1612 err
= ctnetlink_change_nat_seq_adj(ct
, cda
);
1618 memset(&ct
->proto
, 0, sizeof(ct
->proto
));
1619 if (cda
[CTA_PROTOINFO
]) {
1620 err
= ctnetlink_change_protoinfo(ct
, cda
);
1625 #if defined(CONFIG_NF_CONNTRACK_MARK)
1627 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1630 /* setup master conntrack: this is a confirmed expectation */
1631 if (cda
[CTA_TUPLE_MASTER
]) {
1632 struct nf_conntrack_tuple master
;
1633 struct nf_conntrack_tuple_hash
*master_h
;
1634 struct nf_conn
*master_ct
;
1636 err
= ctnetlink_parse_tuple(cda
, &master
, CTA_TUPLE_MASTER
, u3
);
1640 master_h
= nf_conntrack_find_get(net
, zone
, &master
);
1641 if (master_h
== NULL
) {
1645 master_ct
= nf_ct_tuplehash_to_ctrack(master_h
);
1646 __set_bit(IPS_EXPECTED_BIT
, &ct
->status
);
1647 ct
->master
= master_ct
;
1649 tstamp
= nf_conn_tstamp_find(ct
);
1651 tstamp
->start
= ktime_to_ns(ktime_get_real());
1653 err
= nf_conntrack_hash_check_insert(ct
);
1664 nf_conntrack_free(ct
);
1665 return ERR_PTR(err
);
1669 ctnetlink_new_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1670 const struct nlmsghdr
*nlh
,
1671 const struct nlattr
* const cda
[])
1673 struct net
*net
= sock_net(ctnl
);
1674 struct nf_conntrack_tuple otuple
, rtuple
;
1675 struct nf_conntrack_tuple_hash
*h
= NULL
;
1676 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1678 u_int8_t u3
= nfmsg
->nfgen_family
;
1682 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1686 if (cda
[CTA_TUPLE_ORIG
]) {
1687 err
= ctnetlink_parse_tuple(cda
, &otuple
, CTA_TUPLE_ORIG
, u3
);
1692 if (cda
[CTA_TUPLE_REPLY
]) {
1693 err
= ctnetlink_parse_tuple(cda
, &rtuple
, CTA_TUPLE_REPLY
, u3
);
1698 if (cda
[CTA_TUPLE_ORIG
])
1699 h
= nf_conntrack_find_get(net
, zone
, &otuple
);
1700 else if (cda
[CTA_TUPLE_REPLY
])
1701 h
= nf_conntrack_find_get(net
, zone
, &rtuple
);
1705 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
1706 enum ip_conntrack_events events
;
1708 ct
= ctnetlink_create_conntrack(net
, zone
, cda
, &otuple
,
1714 if (test_bit(IPS_EXPECTED_BIT
, &ct
->status
))
1715 events
= IPCT_RELATED
;
1719 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1720 (1 << IPCT_ASSURED
) |
1721 (1 << IPCT_HELPER
) |
1722 (1 << IPCT_PROTOINFO
) |
1723 (1 << IPCT_NATSEQADJ
) |
1724 (1 << IPCT_MARK
) | events
,
1725 ct
, NETLINK_CB(skb
).portid
,
1732 /* implicit 'else' */
1735 ct
= nf_ct_tuplehash_to_ctrack(h
);
1736 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
)) {
1737 spin_lock_bh(&nf_conntrack_lock
);
1738 err
= ctnetlink_change_conntrack(ct
, cda
);
1739 spin_unlock_bh(&nf_conntrack_lock
);
1741 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1742 (1 << IPCT_ASSURED
) |
1743 (1 << IPCT_HELPER
) |
1744 (1 << IPCT_PROTOINFO
) |
1745 (1 << IPCT_NATSEQADJ
) |
1747 ct
, NETLINK_CB(skb
).portid
,
1757 ctnetlink_ct_stat_cpu_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
1758 __u16 cpu
, const struct ip_conntrack_stat
*st
)
1760 struct nlmsghdr
*nlh
;
1761 struct nfgenmsg
*nfmsg
;
1762 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1764 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS_CPU
);
1765 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1769 nfmsg
= nlmsg_data(nlh
);
1770 nfmsg
->nfgen_family
= AF_UNSPEC
;
1771 nfmsg
->version
= NFNETLINK_V0
;
1772 nfmsg
->res_id
= htons(cpu
);
1774 if (nla_put_be32(skb
, CTA_STATS_SEARCHED
, htonl(st
->searched
)) ||
1775 nla_put_be32(skb
, CTA_STATS_FOUND
, htonl(st
->found
)) ||
1776 nla_put_be32(skb
, CTA_STATS_NEW
, htonl(st
->new)) ||
1777 nla_put_be32(skb
, CTA_STATS_INVALID
, htonl(st
->invalid
)) ||
1778 nla_put_be32(skb
, CTA_STATS_IGNORE
, htonl(st
->ignore
)) ||
1779 nla_put_be32(skb
, CTA_STATS_DELETE
, htonl(st
->delete)) ||
1780 nla_put_be32(skb
, CTA_STATS_DELETE_LIST
, htonl(st
->delete_list
)) ||
1781 nla_put_be32(skb
, CTA_STATS_INSERT
, htonl(st
->insert
)) ||
1782 nla_put_be32(skb
, CTA_STATS_INSERT_FAILED
,
1783 htonl(st
->insert_failed
)) ||
1784 nla_put_be32(skb
, CTA_STATS_DROP
, htonl(st
->drop
)) ||
1785 nla_put_be32(skb
, CTA_STATS_EARLY_DROP
, htonl(st
->early_drop
)) ||
1786 nla_put_be32(skb
, CTA_STATS_ERROR
, htonl(st
->error
)) ||
1787 nla_put_be32(skb
, CTA_STATS_SEARCH_RESTART
,
1788 htonl(st
->search_restart
)))
1789 goto nla_put_failure
;
1791 nlmsg_end(skb
, nlh
);
1796 nlmsg_cancel(skb
, nlh
);
1801 ctnetlink_ct_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1804 struct net
*net
= sock_net(skb
->sk
);
1806 if (cb
->args
[0] == nr_cpu_ids
)
1809 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
1810 const struct ip_conntrack_stat
*st
;
1812 if (!cpu_possible(cpu
))
1815 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
1816 if (ctnetlink_ct_stat_cpu_fill_info(skb
,
1817 NETLINK_CB(cb
->skb
).portid
,
1828 ctnetlink_stat_ct_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
1829 const struct nlmsghdr
*nlh
,
1830 const struct nlattr
* const cda
[])
1832 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1833 struct netlink_dump_control c
= {
1834 .dump
= ctnetlink_ct_stat_cpu_dump
,
1836 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1843 ctnetlink_stat_ct_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
1846 struct nlmsghdr
*nlh
;
1847 struct nfgenmsg
*nfmsg
;
1848 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1849 unsigned int nr_conntracks
= atomic_read(&net
->ct
.count
);
1851 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS
);
1852 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1856 nfmsg
= nlmsg_data(nlh
);
1857 nfmsg
->nfgen_family
= AF_UNSPEC
;
1858 nfmsg
->version
= NFNETLINK_V0
;
1861 if (nla_put_be32(skb
, CTA_STATS_GLOBAL_ENTRIES
, htonl(nr_conntracks
)))
1862 goto nla_put_failure
;
1864 nlmsg_end(skb
, nlh
);
1869 nlmsg_cancel(skb
, nlh
);
1874 ctnetlink_stat_ct(struct sock
*ctnl
, struct sk_buff
*skb
,
1875 const struct nlmsghdr
*nlh
,
1876 const struct nlattr
* const cda
[])
1878 struct sk_buff
*skb2
;
1881 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1885 err
= ctnetlink_stat_ct_fill_info(skb2
, NETLINK_CB(skb
).portid
,
1887 NFNL_MSG_TYPE(nlh
->nlmsg_type
),
1892 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1901 /* this avoids a loop in nfnetlink. */
1902 return err
== -EAGAIN
? -ENOBUFS
: err
;
1905 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
1907 ctnetlink_nfqueue_build_size(const struct nf_conn
*ct
)
1909 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
1910 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
1911 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
1912 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
1913 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
1914 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
1915 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
1916 + nla_total_size(0) /* CTA_PROTOINFO */
1917 + nla_total_size(0) /* CTA_HELP */
1918 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
1919 + ctnetlink_secctx_size(ct
)
1920 #ifdef CONFIG_NF_NAT_NEEDED
1921 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
1922 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
1924 #ifdef CONFIG_NF_CONNTRACK_MARK
1925 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
1927 + ctnetlink_proto_size(ct
)
1932 ctnetlink_nfqueue_build(struct sk_buff
*skb
, struct nf_conn
*ct
)
1934 struct nlattr
*nest_parms
;
1937 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
1939 goto nla_put_failure
;
1940 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
1941 goto nla_put_failure
;
1942 nla_nest_end(skb
, nest_parms
);
1944 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
1946 goto nla_put_failure
;
1947 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
1948 goto nla_put_failure
;
1949 nla_nest_end(skb
, nest_parms
);
1951 if (nf_ct_zone(ct
)) {
1952 if (nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
1953 goto nla_put_failure
;
1956 if (ctnetlink_dump_id(skb
, ct
) < 0)
1957 goto nla_put_failure
;
1959 if (ctnetlink_dump_status(skb
, ct
) < 0)
1960 goto nla_put_failure
;
1962 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
1963 goto nla_put_failure
;
1965 if (ctnetlink_dump_protoinfo(skb
, ct
) < 0)
1966 goto nla_put_failure
;
1968 if (ctnetlink_dump_helpinfo(skb
, ct
) < 0)
1969 goto nla_put_failure
;
1971 #ifdef CONFIG_NF_CONNTRACK_SECMARK
1972 if (ct
->secmark
&& ctnetlink_dump_secctx(skb
, ct
) < 0)
1973 goto nla_put_failure
;
1975 if (ct
->master
&& ctnetlink_dump_master(skb
, ct
) < 0)
1976 goto nla_put_failure
;
1978 if ((ct
->status
& IPS_SEQ_ADJUST
) &&
1979 ctnetlink_dump_nat_seq_adj(skb
, ct
) < 0)
1980 goto nla_put_failure
;
1982 #ifdef CONFIG_NF_CONNTRACK_MARK
1983 if (ct
->mark
&& ctnetlink_dump_mark(skb
, ct
) < 0)
1984 goto nla_put_failure
;
1995 ctnetlink_nfqueue_parse_ct(const struct nlattr
*cda
[], struct nf_conn
*ct
)
1999 if (cda
[CTA_TIMEOUT
]) {
2000 err
= ctnetlink_change_timeout(ct
, cda
);
2004 if (cda
[CTA_STATUS
]) {
2005 err
= ctnetlink_change_status(ct
, cda
);
2009 if (cda
[CTA_HELP
]) {
2010 err
= ctnetlink_change_helper(ct
, cda
);
2014 #if defined(CONFIG_NF_CONNTRACK_MARK)
2016 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
2022 ctnetlink_nfqueue_parse(const struct nlattr
*attr
, struct nf_conn
*ct
)
2024 struct nlattr
*cda
[CTA_MAX
+1];
2027 nla_parse_nested(cda
, CTA_MAX
, attr
, ct_nla_policy
);
2029 spin_lock_bh(&nf_conntrack_lock
);
2030 ret
= ctnetlink_nfqueue_parse_ct((const struct nlattr
**)cda
, ct
);
2031 spin_unlock_bh(&nf_conntrack_lock
);
2036 static struct nfq_ct_hook ctnetlink_nfqueue_hook
= {
2037 .build_size
= ctnetlink_nfqueue_build_size
,
2038 .build
= ctnetlink_nfqueue_build
,
2039 .parse
= ctnetlink_nfqueue_parse
,
2041 #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
2043 /***********************************************************************
2045 ***********************************************************************/
2048 ctnetlink_exp_dump_tuple(struct sk_buff
*skb
,
2049 const struct nf_conntrack_tuple
*tuple
,
2050 enum ctattr_expect type
)
2052 struct nlattr
*nest_parms
;
2054 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
2056 goto nla_put_failure
;
2057 if (ctnetlink_dump_tuples(skb
, tuple
) < 0)
2058 goto nla_put_failure
;
2059 nla_nest_end(skb
, nest_parms
);
2068 ctnetlink_exp_dump_mask(struct sk_buff
*skb
,
2069 const struct nf_conntrack_tuple
*tuple
,
2070 const struct nf_conntrack_tuple_mask
*mask
)
2073 struct nf_conntrack_l3proto
*l3proto
;
2074 struct nf_conntrack_l4proto
*l4proto
;
2075 struct nf_conntrack_tuple m
;
2076 struct nlattr
*nest_parms
;
2078 memset(&m
, 0xFF, sizeof(m
));
2079 memcpy(&m
.src
.u3
, &mask
->src
.u3
, sizeof(m
.src
.u3
));
2080 m
.src
.u
.all
= mask
->src
.u
.all
;
2081 m
.dst
.protonum
= tuple
->dst
.protonum
;
2083 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_MASK
| NLA_F_NESTED
);
2085 goto nla_put_failure
;
2088 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
2089 ret
= ctnetlink_dump_tuples_ip(skb
, &m
, l3proto
);
2091 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
,
2092 tuple
->dst
.protonum
);
2093 ret
= ctnetlink_dump_tuples_proto(skb
, &m
, l4proto
);
2097 if (unlikely(ret
< 0))
2098 goto nla_put_failure
;
2100 nla_nest_end(skb
, nest_parms
);
2108 static const union nf_inet_addr any_addr
;
2111 ctnetlink_exp_dump_expect(struct sk_buff
*skb
,
2112 const struct nf_conntrack_expect
*exp
)
2114 struct nf_conn
*master
= exp
->master
;
2115 long timeout
= ((long)exp
->timeout
.expires
- (long)jiffies
) / HZ
;
2116 struct nf_conn_help
*help
;
2117 #ifdef CONFIG_NF_NAT_NEEDED
2118 struct nlattr
*nest_parms
;
2119 struct nf_conntrack_tuple nat_tuple
= {};
2121 struct nf_ct_helper_expectfn
*expfn
;
2126 if (ctnetlink_exp_dump_tuple(skb
, &exp
->tuple
, CTA_EXPECT_TUPLE
) < 0)
2127 goto nla_put_failure
;
2128 if (ctnetlink_exp_dump_mask(skb
, &exp
->tuple
, &exp
->mask
) < 0)
2129 goto nla_put_failure
;
2130 if (ctnetlink_exp_dump_tuple(skb
,
2131 &master
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
2132 CTA_EXPECT_MASTER
) < 0)
2133 goto nla_put_failure
;
2135 #ifdef CONFIG_NF_NAT_NEEDED
2136 if (!nf_inet_addr_cmp(&exp
->saved_addr
, &any_addr
) ||
2137 exp
->saved_proto
.all
) {
2138 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_NAT
| NLA_F_NESTED
);
2140 goto nla_put_failure
;
2142 if (nla_put_be32(skb
, CTA_EXPECT_NAT_DIR
, htonl(exp
->dir
)))
2143 goto nla_put_failure
;
2145 nat_tuple
.src
.l3num
= nf_ct_l3num(master
);
2146 nat_tuple
.src
.u3
= exp
->saved_addr
;
2147 nat_tuple
.dst
.protonum
= nf_ct_protonum(master
);
2148 nat_tuple
.src
.u
= exp
->saved_proto
;
2150 if (ctnetlink_exp_dump_tuple(skb
, &nat_tuple
,
2151 CTA_EXPECT_NAT_TUPLE
) < 0)
2152 goto nla_put_failure
;
2153 nla_nest_end(skb
, nest_parms
);
2156 if (nla_put_be32(skb
, CTA_EXPECT_TIMEOUT
, htonl(timeout
)) ||
2157 nla_put_be32(skb
, CTA_EXPECT_ID
, htonl((unsigned long)exp
)) ||
2158 nla_put_be32(skb
, CTA_EXPECT_FLAGS
, htonl(exp
->flags
)) ||
2159 nla_put_be32(skb
, CTA_EXPECT_CLASS
, htonl(exp
->class)))
2160 goto nla_put_failure
;
2161 help
= nfct_help(master
);
2163 struct nf_conntrack_helper
*helper
;
2165 helper
= rcu_dereference(help
->helper
);
2167 nla_put_string(skb
, CTA_EXPECT_HELP_NAME
, helper
->name
))
2168 goto nla_put_failure
;
2170 expfn
= nf_ct_helper_expectfn_find_by_symbol(exp
->expectfn
);
2171 if (expfn
!= NULL
&&
2172 nla_put_string(skb
, CTA_EXPECT_FN
, expfn
->name
))
2173 goto nla_put_failure
;
2182 ctnetlink_exp_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
2183 int event
, const struct nf_conntrack_expect
*exp
)
2185 struct nlmsghdr
*nlh
;
2186 struct nfgenmsg
*nfmsg
;
2187 unsigned int flags
= portid
? NLM_F_MULTI
: 0;
2189 event
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2190 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
2194 nfmsg
= nlmsg_data(nlh
);
2195 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2196 nfmsg
->version
= NFNETLINK_V0
;
2199 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2200 goto nla_put_failure
;
2202 nlmsg_end(skb
, nlh
);
2207 nlmsg_cancel(skb
, nlh
);
2211 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2213 ctnetlink_expect_event(unsigned int events
, struct nf_exp_event
*item
)
2215 struct nf_conntrack_expect
*exp
= item
->exp
;
2216 struct net
*net
= nf_ct_exp_net(exp
);
2217 struct nlmsghdr
*nlh
;
2218 struct nfgenmsg
*nfmsg
;
2219 struct sk_buff
*skb
;
2220 unsigned int type
, group
;
2223 if (events
& (1 << IPEXP_DESTROY
)) {
2224 type
= IPCTNL_MSG_EXP_DELETE
;
2225 group
= NFNLGRP_CONNTRACK_EXP_DESTROY
;
2226 } else if (events
& (1 << IPEXP_NEW
)) {
2227 type
= IPCTNL_MSG_EXP_NEW
;
2228 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
2229 group
= NFNLGRP_CONNTRACK_EXP_NEW
;
2233 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
2236 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
2240 type
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2241 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
2245 nfmsg
= nlmsg_data(nlh
);
2246 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2247 nfmsg
->version
= NFNETLINK_V0
;
2251 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2252 goto nla_put_failure
;
2255 nlmsg_end(skb
, nlh
);
2256 nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
, GFP_ATOMIC
);
2261 nlmsg_cancel(skb
, nlh
);
2265 nfnetlink_set_err(net
, 0, 0, -ENOBUFS
);
2269 static int ctnetlink_exp_done(struct netlink_callback
*cb
)
2272 nf_ct_expect_put((struct nf_conntrack_expect
*)cb
->args
[1]);
2277 ctnetlink_exp_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2279 struct net
*net
= sock_net(skb
->sk
);
2280 struct nf_conntrack_expect
*exp
, *last
;
2281 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2282 struct hlist_node
*n
;
2283 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2286 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2287 for (; cb
->args
[0] < nf_ct_expect_hsize
; cb
->args
[0]++) {
2289 hlist_for_each_entry(exp
, n
, &net
->ct
.expect_hash
[cb
->args
[0]],
2291 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2298 if (ctnetlink_exp_fill_info(skb
,
2299 NETLINK_CB(cb
->skb
).portid
,
2303 if (!atomic_inc_not_zero(&exp
->use
))
2305 cb
->args
[1] = (unsigned long)exp
;
2317 nf_ct_expect_put(last
);
2322 static const struct nla_policy exp_nla_policy
[CTA_EXPECT_MAX
+1] = {
2323 [CTA_EXPECT_MASTER
] = { .type
= NLA_NESTED
},
2324 [CTA_EXPECT_TUPLE
] = { .type
= NLA_NESTED
},
2325 [CTA_EXPECT_MASK
] = { .type
= NLA_NESTED
},
2326 [CTA_EXPECT_TIMEOUT
] = { .type
= NLA_U32
},
2327 [CTA_EXPECT_ID
] = { .type
= NLA_U32
},
2328 [CTA_EXPECT_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
2329 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
2330 [CTA_EXPECT_ZONE
] = { .type
= NLA_U16
},
2331 [CTA_EXPECT_FLAGS
] = { .type
= NLA_U32
},
2332 [CTA_EXPECT_CLASS
] = { .type
= NLA_U32
},
2333 [CTA_EXPECT_NAT
] = { .type
= NLA_NESTED
},
2334 [CTA_EXPECT_FN
] = { .type
= NLA_NUL_STRING
},
2338 ctnetlink_get_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2339 const struct nlmsghdr
*nlh
,
2340 const struct nlattr
* const cda
[])
2342 struct net
*net
= sock_net(ctnl
);
2343 struct nf_conntrack_tuple tuple
;
2344 struct nf_conntrack_expect
*exp
;
2345 struct sk_buff
*skb2
;
2346 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2347 u_int8_t u3
= nfmsg
->nfgen_family
;
2351 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
2352 struct netlink_dump_control c
= {
2353 .dump
= ctnetlink_exp_dump_table
,
2354 .done
= ctnetlink_exp_done
,
2356 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2359 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2363 if (cda
[CTA_EXPECT_TUPLE
])
2364 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2365 else if (cda
[CTA_EXPECT_MASTER
])
2366 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
2373 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2377 if (cda
[CTA_EXPECT_ID
]) {
2378 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2379 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2380 nf_ct_expect_put(exp
);
2386 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
2388 nf_ct_expect_put(exp
);
2393 err
= ctnetlink_exp_fill_info(skb2
, NETLINK_CB(skb
).portid
,
2394 nlh
->nlmsg_seq
, IPCTNL_MSG_EXP_NEW
, exp
);
2396 nf_ct_expect_put(exp
);
2400 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
2409 /* this avoids a loop in nfnetlink. */
2410 return err
== -EAGAIN
? -ENOBUFS
: err
;
2414 ctnetlink_del_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2415 const struct nlmsghdr
*nlh
,
2416 const struct nlattr
* const cda
[])
2418 struct net
*net
= sock_net(ctnl
);
2419 struct nf_conntrack_expect
*exp
;
2420 struct nf_conntrack_tuple tuple
;
2421 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2422 struct hlist_node
*n
, *next
;
2423 u_int8_t u3
= nfmsg
->nfgen_family
;
2428 if (cda
[CTA_EXPECT_TUPLE
]) {
2429 /* delete a single expect by tuple */
2430 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2434 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2438 /* bump usage count to 2 */
2439 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2443 if (cda
[CTA_EXPECT_ID
]) {
2444 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2445 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2446 nf_ct_expect_put(exp
);
2451 /* after list removal, usage count == 1 */
2452 spin_lock_bh(&nf_conntrack_lock
);
2453 if (del_timer(&exp
->timeout
)) {
2454 nf_ct_unlink_expect_report(exp
, NETLINK_CB(skb
).portid
,
2456 nf_ct_expect_put(exp
);
2458 spin_unlock_bh(&nf_conntrack_lock
);
2459 /* have to put what we 'get' above.
2460 * after this line usage count == 0 */
2461 nf_ct_expect_put(exp
);
2462 } else if (cda
[CTA_EXPECT_HELP_NAME
]) {
2463 char *name
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2464 struct nf_conn_help
*m_help
;
2466 /* delete all expectations for this helper */
2467 spin_lock_bh(&nf_conntrack_lock
);
2468 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2469 hlist_for_each_entry_safe(exp
, n
, next
,
2470 &net
->ct
.expect_hash
[i
],
2472 m_help
= nfct_help(exp
->master
);
2473 if (!strcmp(m_help
->helper
->name
, name
) &&
2474 del_timer(&exp
->timeout
)) {
2475 nf_ct_unlink_expect_report(exp
,
2476 NETLINK_CB(skb
).portid
,
2478 nf_ct_expect_put(exp
);
2482 spin_unlock_bh(&nf_conntrack_lock
);
2484 /* This basically means we have to flush everything*/
2485 spin_lock_bh(&nf_conntrack_lock
);
2486 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2487 hlist_for_each_entry_safe(exp
, n
, next
,
2488 &net
->ct
.expect_hash
[i
],
2490 if (del_timer(&exp
->timeout
)) {
2491 nf_ct_unlink_expect_report(exp
,
2492 NETLINK_CB(skb
).portid
,
2494 nf_ct_expect_put(exp
);
2498 spin_unlock_bh(&nf_conntrack_lock
);
2504 ctnetlink_change_expect(struct nf_conntrack_expect
*x
,
2505 const struct nlattr
* const cda
[])
2507 if (cda
[CTA_EXPECT_TIMEOUT
]) {
2508 if (!del_timer(&x
->timeout
))
2511 x
->timeout
.expires
= jiffies
+
2512 ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2513 add_timer(&x
->timeout
);
2518 static const struct nla_policy exp_nat_nla_policy
[CTA_EXPECT_NAT_MAX
+1] = {
2519 [CTA_EXPECT_NAT_DIR
] = { .type
= NLA_U32
},
2520 [CTA_EXPECT_NAT_TUPLE
] = { .type
= NLA_NESTED
},
2524 ctnetlink_parse_expect_nat(const struct nlattr
*attr
,
2525 struct nf_conntrack_expect
*exp
,
2528 #ifdef CONFIG_NF_NAT_NEEDED
2529 struct nlattr
*tb
[CTA_EXPECT_NAT_MAX
+1];
2530 struct nf_conntrack_tuple nat_tuple
= {};
2533 nla_parse_nested(tb
, CTA_EXPECT_NAT_MAX
, attr
, exp_nat_nla_policy
);
2535 if (!tb
[CTA_EXPECT_NAT_DIR
] || !tb
[CTA_EXPECT_NAT_TUPLE
])
2538 err
= ctnetlink_parse_tuple((const struct nlattr
* const *)tb
,
2539 &nat_tuple
, CTA_EXPECT_NAT_TUPLE
, u3
);
2543 exp
->saved_addr
= nat_tuple
.src
.u3
;
2544 exp
->saved_proto
= nat_tuple
.src
.u
;
2545 exp
->dir
= ntohl(nla_get_be32(tb
[CTA_EXPECT_NAT_DIR
]));
2554 ctnetlink_create_expect(struct net
*net
, u16 zone
,
2555 const struct nlattr
* const cda
[],
2557 u32 portid
, int report
)
2559 struct nf_conntrack_tuple tuple
, mask
, master_tuple
;
2560 struct nf_conntrack_tuple_hash
*h
= NULL
;
2561 struct nf_conntrack_expect
*exp
;
2563 struct nf_conn_help
*help
;
2564 struct nf_conntrack_helper
*helper
= NULL
;
2565 u_int32_t
class = 0;
2568 /* caller guarantees that those three CTA_EXPECT_* exist */
2569 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2572 err
= ctnetlink_parse_tuple(cda
, &mask
, CTA_EXPECT_MASK
, u3
);
2575 err
= ctnetlink_parse_tuple(cda
, &master_tuple
, CTA_EXPECT_MASTER
, u3
);
2579 /* Look for master conntrack of this expectation */
2580 h
= nf_conntrack_find_get(net
, zone
, &master_tuple
);
2583 ct
= nf_ct_tuplehash_to_ctrack(h
);
2585 /* Look for helper of this expectation */
2586 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2587 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2589 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
2590 nf_ct_protonum(ct
));
2591 if (helper
== NULL
) {
2592 #ifdef CONFIG_MODULES
2593 if (request_module("nfct-helper-%s", helpname
) < 0) {
2598 helper
= __nf_conntrack_helper_find(helpname
,
2600 nf_ct_protonum(ct
));
2611 if (cda
[CTA_EXPECT_CLASS
] && helper
) {
2612 class = ntohl(nla_get_be32(cda
[CTA_EXPECT_CLASS
]));
2613 if (class > helper
->expect_class_max
) {
2618 exp
= nf_ct_expect_alloc(ct
);
2623 help
= nfct_help(ct
);
2625 if (!cda
[CTA_EXPECT_TIMEOUT
]) {
2629 exp
->timeout
.expires
=
2630 jiffies
+ ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2632 exp
->flags
= NF_CT_EXPECT_USERSPACE
;
2633 if (cda
[CTA_EXPECT_FLAGS
]) {
2635 ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2638 if (cda
[CTA_EXPECT_FLAGS
]) {
2639 exp
->flags
= ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2640 exp
->flags
&= ~NF_CT_EXPECT_USERSPACE
;
2644 if (cda
[CTA_EXPECT_FN
]) {
2645 const char *name
= nla_data(cda
[CTA_EXPECT_FN
]);
2646 struct nf_ct_helper_expectfn
*expfn
;
2648 expfn
= nf_ct_helper_expectfn_find_by_name(name
);
2649 if (expfn
== NULL
) {
2653 exp
->expectfn
= expfn
->expectfn
;
2655 exp
->expectfn
= NULL
;
2659 exp
->helper
= helper
;
2660 memcpy(&exp
->tuple
, &tuple
, sizeof(struct nf_conntrack_tuple
));
2661 memcpy(&exp
->mask
.src
.u3
, &mask
.src
.u3
, sizeof(exp
->mask
.src
.u3
));
2662 exp
->mask
.src
.u
.all
= mask
.src
.u
.all
;
2664 if (cda
[CTA_EXPECT_NAT
]) {
2665 err
= ctnetlink_parse_expect_nat(cda
[CTA_EXPECT_NAT
],
2670 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2672 nf_ct_expect_put(exp
);
2674 nf_ct_put(nf_ct_tuplehash_to_ctrack(h
));
2679 ctnetlink_new_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2680 const struct nlmsghdr
*nlh
,
2681 const struct nlattr
* const cda
[])
2683 struct net
*net
= sock_net(ctnl
);
2684 struct nf_conntrack_tuple tuple
;
2685 struct nf_conntrack_expect
*exp
;
2686 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2687 u_int8_t u3
= nfmsg
->nfgen_family
;
2691 if (!cda
[CTA_EXPECT_TUPLE
]
2692 || !cda
[CTA_EXPECT_MASK
]
2693 || !cda
[CTA_EXPECT_MASTER
])
2696 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2700 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2704 spin_lock_bh(&nf_conntrack_lock
);
2705 exp
= __nf_ct_expect_find(net
, zone
, &tuple
);
2708 spin_unlock_bh(&nf_conntrack_lock
);
2710 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
2711 err
= ctnetlink_create_expect(net
, zone
, cda
,
2713 NETLINK_CB(skb
).portid
,
2720 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
))
2721 err
= ctnetlink_change_expect(exp
, cda
);
2722 spin_unlock_bh(&nf_conntrack_lock
);
2728 ctnetlink_exp_stat_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, int cpu
,
2729 const struct ip_conntrack_stat
*st
)
2731 struct nlmsghdr
*nlh
;
2732 struct nfgenmsg
*nfmsg
;
2733 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
2735 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_EXP_GET_STATS_CPU
);
2736 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
2740 nfmsg
= nlmsg_data(nlh
);
2741 nfmsg
->nfgen_family
= AF_UNSPEC
;
2742 nfmsg
->version
= NFNETLINK_V0
;
2743 nfmsg
->res_id
= htons(cpu
);
2745 if (nla_put_be32(skb
, CTA_STATS_EXP_NEW
, htonl(st
->expect_new
)) ||
2746 nla_put_be32(skb
, CTA_STATS_EXP_CREATE
, htonl(st
->expect_create
)) ||
2747 nla_put_be32(skb
, CTA_STATS_EXP_DELETE
, htonl(st
->expect_delete
)))
2748 goto nla_put_failure
;
2750 nlmsg_end(skb
, nlh
);
2755 nlmsg_cancel(skb
, nlh
);
2760 ctnetlink_exp_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2763 struct net
*net
= sock_net(skb
->sk
);
2765 if (cb
->args
[0] == nr_cpu_ids
)
2768 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
2769 const struct ip_conntrack_stat
*st
;
2771 if (!cpu_possible(cpu
))
2774 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
2775 if (ctnetlink_exp_stat_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
2786 ctnetlink_stat_exp_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
2787 const struct nlmsghdr
*nlh
,
2788 const struct nlattr
* const cda
[])
2790 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
2791 struct netlink_dump_control c
= {
2792 .dump
= ctnetlink_exp_stat_cpu_dump
,
2794 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2800 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2801 static struct nf_ct_event_notifier ctnl_notifier
= {
2802 .fcn
= ctnetlink_conntrack_event
,
2805 static struct nf_exp_event_notifier ctnl_notifier_exp
= {
2806 .fcn
= ctnetlink_expect_event
,
2810 static const struct nfnl_callback ctnl_cb
[IPCTNL_MSG_MAX
] = {
2811 [IPCTNL_MSG_CT_NEW
] = { .call
= ctnetlink_new_conntrack
,
2812 .attr_count
= CTA_MAX
,
2813 .policy
= ct_nla_policy
},
2814 [IPCTNL_MSG_CT_GET
] = { .call
= ctnetlink_get_conntrack
,
2815 .attr_count
= CTA_MAX
,
2816 .policy
= ct_nla_policy
},
2817 [IPCTNL_MSG_CT_DELETE
] = { .call
= ctnetlink_del_conntrack
,
2818 .attr_count
= CTA_MAX
,
2819 .policy
= ct_nla_policy
},
2820 [IPCTNL_MSG_CT_GET_CTRZERO
] = { .call
= ctnetlink_get_conntrack
,
2821 .attr_count
= CTA_MAX
,
2822 .policy
= ct_nla_policy
},
2823 [IPCTNL_MSG_CT_GET_STATS_CPU
] = { .call
= ctnetlink_stat_ct_cpu
},
2824 [IPCTNL_MSG_CT_GET_STATS
] = { .call
= ctnetlink_stat_ct
},
2825 [IPCTNL_MSG_CT_GET_DYING
] = { .call
= ctnetlink_get_ct_dying
},
2826 [IPCTNL_MSG_CT_GET_UNCONFIRMED
] = { .call
= ctnetlink_get_ct_unconfirmed
},
2829 static const struct nfnl_callback ctnl_exp_cb
[IPCTNL_MSG_EXP_MAX
] = {
2830 [IPCTNL_MSG_EXP_GET
] = { .call
= ctnetlink_get_expect
,
2831 .attr_count
= CTA_EXPECT_MAX
,
2832 .policy
= exp_nla_policy
},
2833 [IPCTNL_MSG_EXP_NEW
] = { .call
= ctnetlink_new_expect
,
2834 .attr_count
= CTA_EXPECT_MAX
,
2835 .policy
= exp_nla_policy
},
2836 [IPCTNL_MSG_EXP_DELETE
] = { .call
= ctnetlink_del_expect
,
2837 .attr_count
= CTA_EXPECT_MAX
,
2838 .policy
= exp_nla_policy
},
2839 [IPCTNL_MSG_EXP_GET_STATS_CPU
] = { .call
= ctnetlink_stat_exp_cpu
},
2842 static const struct nfnetlink_subsystem ctnl_subsys
= {
2843 .name
= "conntrack",
2844 .subsys_id
= NFNL_SUBSYS_CTNETLINK
,
2845 .cb_count
= IPCTNL_MSG_MAX
,
2849 static const struct nfnetlink_subsystem ctnl_exp_subsys
= {
2850 .name
= "conntrack_expect",
2851 .subsys_id
= NFNL_SUBSYS_CTNETLINK_EXP
,
2852 .cb_count
= IPCTNL_MSG_EXP_MAX
,
2856 MODULE_ALIAS("ip_conntrack_netlink");
2857 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK
);
2858 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP
);
2860 static int __net_init
ctnetlink_net_init(struct net
*net
)
2862 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2865 ret
= nf_conntrack_register_notifier(net
, &ctnl_notifier
);
2867 pr_err("ctnetlink_init: cannot register notifier.\n");
2871 ret
= nf_ct_expect_register_notifier(net
, &ctnl_notifier_exp
);
2873 pr_err("ctnetlink_init: cannot expect register notifier.\n");
2874 goto err_unreg_notifier
;
2879 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2881 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
2887 static void ctnetlink_net_exit(struct net
*net
)
2889 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2890 nf_ct_expect_unregister_notifier(net
, &ctnl_notifier_exp
);
2891 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
2895 static void __net_exit
ctnetlink_net_exit_batch(struct list_head
*net_exit_list
)
2899 list_for_each_entry(net
, net_exit_list
, exit_list
)
2900 ctnetlink_net_exit(net
);
2903 static struct pernet_operations ctnetlink_net_ops
= {
2904 .init
= ctnetlink_net_init
,
2905 .exit_batch
= ctnetlink_net_exit_batch
,
2908 static int __init
ctnetlink_init(void)
2912 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version
);
2913 ret
= nfnetlink_subsys_register(&ctnl_subsys
);
2915 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
2919 ret
= nfnetlink_subsys_register(&ctnl_exp_subsys
);
2921 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
2922 goto err_unreg_subsys
;
2925 ret
= register_pernet_subsys(&ctnetlink_net_ops
);
2927 pr_err("ctnetlink_init: cannot register pernet operations\n");
2928 goto err_unreg_exp_subsys
;
2930 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
2931 /* setup interaction between nf_queue and nf_conntrack_netlink. */
2932 RCU_INIT_POINTER(nfq_ct_hook
, &ctnetlink_nfqueue_hook
);
2936 err_unreg_exp_subsys
:
2937 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
2939 nfnetlink_subsys_unregister(&ctnl_subsys
);
2944 static void __exit
ctnetlink_exit(void)
2946 pr_info("ctnetlink: unregistering from nfnetlink.\n");
2948 unregister_pernet_subsys(&ctnetlink_net_ops
);
2949 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
2950 nfnetlink_subsys_unregister(&ctnl_subsys
);
2951 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
2952 RCU_INIT_POINTER(nfq_ct_hook
, NULL
);
2956 module_init(ctnetlink_init
);
2957 module_exit(ctnetlink_exit
);