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_seqadj.h>
41 #include <net/netfilter/nf_conntrack_l3proto.h>
42 #include <net/netfilter/nf_conntrack_l4proto.h>
43 #include <net/netfilter/nf_conntrack_tuple.h>
44 #include <net/netfilter/nf_conntrack_acct.h>
45 #include <net/netfilter/nf_conntrack_zones.h>
46 #include <net/netfilter/nf_conntrack_timestamp.h>
47 #include <net/netfilter/nf_conntrack_labels.h>
48 #ifdef CONFIG_NF_NAT_NEEDED
49 #include <net/netfilter/nf_nat_core.h>
50 #include <net/netfilter/nf_nat_l4proto.h>
51 #include <net/netfilter/nf_nat_helper.h>
54 #include <linux/netfilter/nfnetlink.h>
55 #include <linux/netfilter/nfnetlink_conntrack.h>
57 MODULE_LICENSE("GPL");
59 static char __initdata version
[] = "0.93";
62 ctnetlink_dump_tuples_proto(struct sk_buff
*skb
,
63 const struct nf_conntrack_tuple
*tuple
,
64 struct nf_conntrack_l4proto
*l4proto
)
67 struct nlattr
*nest_parms
;
69 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_PROTO
| NLA_F_NESTED
);
72 if (nla_put_u8(skb
, CTA_PROTO_NUM
, tuple
->dst
.protonum
))
75 if (likely(l4proto
->tuple_to_nlattr
))
76 ret
= l4proto
->tuple_to_nlattr(skb
, tuple
);
78 nla_nest_end(skb
, nest_parms
);
87 ctnetlink_dump_tuples_ip(struct sk_buff
*skb
,
88 const struct nf_conntrack_tuple
*tuple
,
89 struct nf_conntrack_l3proto
*l3proto
)
92 struct nlattr
*nest_parms
;
94 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_IP
| NLA_F_NESTED
);
98 if (likely(l3proto
->tuple_to_nlattr
))
99 ret
= l3proto
->tuple_to_nlattr(skb
, tuple
);
101 nla_nest_end(skb
, nest_parms
);
110 ctnetlink_dump_tuples(struct sk_buff
*skb
,
111 const struct nf_conntrack_tuple
*tuple
)
114 struct nf_conntrack_l3proto
*l3proto
;
115 struct nf_conntrack_l4proto
*l4proto
;
118 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
119 ret
= ctnetlink_dump_tuples_ip(skb
, tuple
, l3proto
);
122 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
,
123 tuple
->dst
.protonum
);
124 ret
= ctnetlink_dump_tuples_proto(skb
, tuple
, l4proto
);
131 ctnetlink_dump_status(struct sk_buff
*skb
, const struct nf_conn
*ct
)
133 if (nla_put_be32(skb
, CTA_STATUS
, htonl(ct
->status
)))
134 goto nla_put_failure
;
142 ctnetlink_dump_timeout(struct sk_buff
*skb
, const struct nf_conn
*ct
)
144 long timeout
= ((long)ct
->timeout
.expires
- (long)jiffies
) / HZ
;
149 if (nla_put_be32(skb
, CTA_TIMEOUT
, htonl(timeout
)))
150 goto nla_put_failure
;
158 ctnetlink_dump_protoinfo(struct sk_buff
*skb
, struct nf_conn
*ct
)
160 struct nf_conntrack_l4proto
*l4proto
;
161 struct nlattr
*nest_proto
;
164 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
165 if (!l4proto
->to_nlattr
)
168 nest_proto
= nla_nest_start(skb
, CTA_PROTOINFO
| NLA_F_NESTED
);
170 goto nla_put_failure
;
172 ret
= l4proto
->to_nlattr(skb
, nest_proto
, ct
);
174 nla_nest_end(skb
, nest_proto
);
183 ctnetlink_dump_helpinfo(struct sk_buff
*skb
, const struct nf_conn
*ct
)
185 struct nlattr
*nest_helper
;
186 const struct nf_conn_help
*help
= nfct_help(ct
);
187 struct nf_conntrack_helper
*helper
;
192 helper
= rcu_dereference(help
->helper
);
196 nest_helper
= nla_nest_start(skb
, CTA_HELP
| NLA_F_NESTED
);
198 goto nla_put_failure
;
199 if (nla_put_string(skb
, CTA_HELP_NAME
, helper
->name
))
200 goto nla_put_failure
;
202 if (helper
->to_nlattr
)
203 helper
->to_nlattr(skb
, ct
);
205 nla_nest_end(skb
, nest_helper
);
214 dump_counters(struct sk_buff
*skb
, u64 pkts
, u64 bytes
,
215 enum ip_conntrack_dir dir
)
217 enum ctattr_type type
= dir
? CTA_COUNTERS_REPLY
: CTA_COUNTERS_ORIG
;
218 struct nlattr
*nest_count
;
220 nest_count
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
222 goto nla_put_failure
;
224 if (nla_put_be64(skb
, CTA_COUNTERS_PACKETS
, cpu_to_be64(pkts
)) ||
225 nla_put_be64(skb
, CTA_COUNTERS_BYTES
, cpu_to_be64(bytes
)))
226 goto nla_put_failure
;
228 nla_nest_end(skb
, nest_count
);
237 ctnetlink_dump_counters(struct sk_buff
*skb
, const struct nf_conn
*ct
,
238 enum ip_conntrack_dir dir
, int type
)
240 struct nf_conn_counter
*acct
;
243 acct
= nf_conn_acct_find(ct
);
247 if (type
== IPCTNL_MSG_CT_GET_CTRZERO
) {
248 pkts
= atomic64_xchg(&acct
[dir
].packets
, 0);
249 bytes
= atomic64_xchg(&acct
[dir
].bytes
, 0);
251 pkts
= atomic64_read(&acct
[dir
].packets
);
252 bytes
= atomic64_read(&acct
[dir
].bytes
);
254 return dump_counters(skb
, pkts
, bytes
, dir
);
258 ctnetlink_dump_timestamp(struct sk_buff
*skb
, const struct nf_conn
*ct
)
260 struct nlattr
*nest_count
;
261 const struct nf_conn_tstamp
*tstamp
;
263 tstamp
= nf_conn_tstamp_find(ct
);
267 nest_count
= nla_nest_start(skb
, CTA_TIMESTAMP
| NLA_F_NESTED
);
269 goto nla_put_failure
;
271 if (nla_put_be64(skb
, CTA_TIMESTAMP_START
, cpu_to_be64(tstamp
->start
)) ||
272 (tstamp
->stop
!= 0 && nla_put_be64(skb
, CTA_TIMESTAMP_STOP
,
273 cpu_to_be64(tstamp
->stop
))))
274 goto nla_put_failure
;
275 nla_nest_end(skb
, nest_count
);
283 #ifdef CONFIG_NF_CONNTRACK_MARK
285 ctnetlink_dump_mark(struct sk_buff
*skb
, const struct nf_conn
*ct
)
287 if (nla_put_be32(skb
, CTA_MARK
, htonl(ct
->mark
)))
288 goto nla_put_failure
;
295 #define ctnetlink_dump_mark(a, b) (0)
298 #ifdef CONFIG_NF_CONNTRACK_SECMARK
300 ctnetlink_dump_secctx(struct sk_buff
*skb
, const struct nf_conn
*ct
)
302 struct nlattr
*nest_secctx
;
306 ret
= security_secid_to_secctx(ct
->secmark
, &secctx
, &len
);
311 nest_secctx
= nla_nest_start(skb
, CTA_SECCTX
| NLA_F_NESTED
);
313 goto nla_put_failure
;
315 if (nla_put_string(skb
, CTA_SECCTX_NAME
, secctx
))
316 goto nla_put_failure
;
317 nla_nest_end(skb
, nest_secctx
);
321 security_release_secctx(secctx
, len
);
325 #define ctnetlink_dump_secctx(a, b) (0)
328 #ifdef CONFIG_NF_CONNTRACK_LABELS
329 static int ctnetlink_label_size(const struct nf_conn
*ct
)
331 struct nf_conn_labels
*labels
= nf_ct_labels_find(ct
);
335 return nla_total_size(labels
->words
* sizeof(long));
339 ctnetlink_dump_labels(struct sk_buff
*skb
, const struct nf_conn
*ct
)
341 struct nf_conn_labels
*labels
= nf_ct_labels_find(ct
);
347 len
= labels
->words
* sizeof(long);
350 if (labels
->bits
[i
] != 0)
351 return nla_put(skb
, CTA_LABELS
, len
, labels
->bits
);
353 } while (i
< labels
->words
);
358 #define ctnetlink_dump_labels(a, b) (0)
359 #define ctnetlink_label_size(a) (0)
362 #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
365 ctnetlink_dump_master(struct sk_buff
*skb
, const struct nf_conn
*ct
)
367 struct nlattr
*nest_parms
;
369 if (!(ct
->status
& IPS_EXPECTED
))
372 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_MASTER
| NLA_F_NESTED
);
374 goto nla_put_failure
;
375 if (ctnetlink_dump_tuples(skb
, master_tuple(ct
)) < 0)
376 goto nla_put_failure
;
377 nla_nest_end(skb
, nest_parms
);
386 dump_ct_seq_adj(struct sk_buff
*skb
, const struct nf_ct_seqadj
*seq
, int type
)
388 struct nlattr
*nest_parms
;
390 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
392 goto nla_put_failure
;
394 if (nla_put_be32(skb
, CTA_SEQADJ_CORRECTION_POS
,
395 htonl(seq
->correction_pos
)) ||
396 nla_put_be32(skb
, CTA_SEQADJ_OFFSET_BEFORE
,
397 htonl(seq
->offset_before
)) ||
398 nla_put_be32(skb
, CTA_SEQADJ_OFFSET_AFTER
,
399 htonl(seq
->offset_after
)))
400 goto nla_put_failure
;
402 nla_nest_end(skb
, nest_parms
);
411 ctnetlink_dump_ct_seq_adj(struct sk_buff
*skb
, const struct nf_conn
*ct
)
413 struct nf_conn_seqadj
*seqadj
= nfct_seqadj(ct
);
414 struct nf_ct_seqadj
*seq
;
416 if (!(ct
->status
& IPS_SEQ_ADJUST
) || !seqadj
)
419 seq
= &seqadj
->seq
[IP_CT_DIR_ORIGINAL
];
420 if (dump_ct_seq_adj(skb
, seq
, CTA_SEQ_ADJ_ORIG
) == -1)
423 seq
= &seqadj
->seq
[IP_CT_DIR_REPLY
];
424 if (dump_ct_seq_adj(skb
, seq
, CTA_SEQ_ADJ_REPLY
) == -1)
431 ctnetlink_dump_id(struct sk_buff
*skb
, const struct nf_conn
*ct
)
433 if (nla_put_be32(skb
, CTA_ID
, htonl((unsigned long)ct
)))
434 goto nla_put_failure
;
442 ctnetlink_dump_use(struct sk_buff
*skb
, const struct nf_conn
*ct
)
444 if (nla_put_be32(skb
, CTA_USE
, htonl(atomic_read(&ct
->ct_general
.use
))))
445 goto nla_put_failure
;
453 ctnetlink_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
456 struct nlmsghdr
*nlh
;
457 struct nfgenmsg
*nfmsg
;
458 struct nlattr
*nest_parms
;
459 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
461 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_NEW
);
462 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
466 nfmsg
= nlmsg_data(nlh
);
467 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
468 nfmsg
->version
= NFNETLINK_V0
;
471 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
473 goto nla_put_failure
;
474 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
475 goto nla_put_failure
;
476 nla_nest_end(skb
, nest_parms
);
478 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
480 goto nla_put_failure
;
481 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
482 goto nla_put_failure
;
483 nla_nest_end(skb
, nest_parms
);
485 if (nf_ct_zone(ct
) &&
486 nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
487 goto nla_put_failure
;
489 if (ctnetlink_dump_status(skb
, ct
) < 0 ||
490 ctnetlink_dump_timeout(skb
, ct
) < 0 ||
491 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_ORIGINAL
, type
) < 0 ||
492 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_REPLY
, type
) < 0 ||
493 ctnetlink_dump_timestamp(skb
, ct
) < 0 ||
494 ctnetlink_dump_protoinfo(skb
, ct
) < 0 ||
495 ctnetlink_dump_helpinfo(skb
, ct
) < 0 ||
496 ctnetlink_dump_mark(skb
, ct
) < 0 ||
497 ctnetlink_dump_secctx(skb
, ct
) < 0 ||
498 ctnetlink_dump_labels(skb
, ct
) < 0 ||
499 ctnetlink_dump_id(skb
, ct
) < 0 ||
500 ctnetlink_dump_use(skb
, ct
) < 0 ||
501 ctnetlink_dump_master(skb
, ct
) < 0 ||
502 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
503 goto nla_put_failure
;
510 nlmsg_cancel(skb
, nlh
);
515 ctnetlink_proto_size(const struct nf_conn
*ct
)
517 struct nf_conntrack_l3proto
*l3proto
;
518 struct nf_conntrack_l4proto
*l4proto
;
522 l3proto
= __nf_ct_l3proto_find(nf_ct_l3num(ct
));
523 len
+= l3proto
->nla_size
;
525 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
526 len
+= l4proto
->nla_size
;
533 ctnetlink_counters_size(const struct nf_conn
*ct
)
535 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_ACCT
))
537 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
538 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
539 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
544 ctnetlink_secctx_size(const struct nf_conn
*ct
)
546 #ifdef CONFIG_NF_CONNTRACK_SECMARK
549 ret
= security_secid_to_secctx(ct
->secmark
, NULL
, &len
);
553 return nla_total_size(0) /* CTA_SECCTX */
554 + nla_total_size(sizeof(char) * len
); /* CTA_SECCTX_NAME */
561 ctnetlink_timestamp_size(const struct nf_conn
*ct
)
563 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
564 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_TSTAMP
))
566 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
573 ctnetlink_nlmsg_size(const struct nf_conn
*ct
)
575 return NLMSG_ALIGN(sizeof(struct nfgenmsg
))
576 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
577 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
578 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
579 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
580 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
581 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
582 + ctnetlink_counters_size(ct
)
583 + ctnetlink_timestamp_size(ct
)
584 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
585 + nla_total_size(0) /* CTA_PROTOINFO */
586 + nla_total_size(0) /* CTA_HELP */
587 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
588 + ctnetlink_secctx_size(ct
)
589 #ifdef CONFIG_NF_NAT_NEEDED
590 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
591 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
593 #ifdef CONFIG_NF_CONNTRACK_MARK
594 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
596 + ctnetlink_proto_size(ct
)
597 + ctnetlink_label_size(ct
)
601 #ifdef CONFIG_NF_CONNTRACK_EVENTS
603 ctnetlink_conntrack_event(unsigned int events
, struct nf_ct_event
*item
)
606 struct nlmsghdr
*nlh
;
607 struct nfgenmsg
*nfmsg
;
608 struct nlattr
*nest_parms
;
609 struct nf_conn
*ct
= item
->ct
;
612 unsigned int flags
= 0, group
;
615 /* ignore our fake conntrack entry */
616 if (nf_ct_is_untracked(ct
))
619 if (events
& (1 << IPCT_DESTROY
)) {
620 type
= IPCTNL_MSG_CT_DELETE
;
621 group
= NFNLGRP_CONNTRACK_DESTROY
;
622 } else if (events
& ((1 << IPCT_NEW
) | (1 << IPCT_RELATED
))) {
623 type
= IPCTNL_MSG_CT_NEW
;
624 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
625 group
= NFNLGRP_CONNTRACK_NEW
;
627 type
= IPCTNL_MSG_CT_NEW
;
628 group
= NFNLGRP_CONNTRACK_UPDATE
;
633 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
636 skb
= nlmsg_new(ctnetlink_nlmsg_size(ct
), GFP_ATOMIC
);
640 type
|= NFNL_SUBSYS_CTNETLINK
<< 8;
641 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
645 nfmsg
= nlmsg_data(nlh
);
646 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
647 nfmsg
->version
= NFNETLINK_V0
;
651 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
653 goto nla_put_failure
;
654 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
655 goto nla_put_failure
;
656 nla_nest_end(skb
, nest_parms
);
658 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
660 goto nla_put_failure
;
661 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
662 goto nla_put_failure
;
663 nla_nest_end(skb
, nest_parms
);
665 if (nf_ct_zone(ct
) &&
666 nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
667 goto nla_put_failure
;
669 if (ctnetlink_dump_id(skb
, ct
) < 0)
670 goto nla_put_failure
;
672 if (ctnetlink_dump_status(skb
, ct
) < 0)
673 goto nla_put_failure
;
675 if (events
& (1 << IPCT_DESTROY
)) {
676 if (ctnetlink_dump_counters(skb
, ct
,
677 IP_CT_DIR_ORIGINAL
, type
) < 0 ||
678 ctnetlink_dump_counters(skb
, ct
,
679 IP_CT_DIR_REPLY
, type
) < 0 ||
680 ctnetlink_dump_timestamp(skb
, ct
) < 0)
681 goto nla_put_failure
;
683 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
684 goto nla_put_failure
;
686 if (events
& (1 << IPCT_PROTOINFO
)
687 && ctnetlink_dump_protoinfo(skb
, ct
) < 0)
688 goto nla_put_failure
;
690 if ((events
& (1 << IPCT_HELPER
) || nfct_help(ct
))
691 && ctnetlink_dump_helpinfo(skb
, ct
) < 0)
692 goto nla_put_failure
;
694 #ifdef CONFIG_NF_CONNTRACK_SECMARK
695 if ((events
& (1 << IPCT_SECMARK
) || ct
->secmark
)
696 && ctnetlink_dump_secctx(skb
, ct
) < 0)
697 goto nla_put_failure
;
699 if (events
& (1 << IPCT_LABEL
) &&
700 ctnetlink_dump_labels(skb
, ct
) < 0)
701 goto nla_put_failure
;
703 if (events
& (1 << IPCT_RELATED
) &&
704 ctnetlink_dump_master(skb
, ct
) < 0)
705 goto nla_put_failure
;
707 if (events
& (1 << IPCT_SEQADJ
) &&
708 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
709 goto nla_put_failure
;
712 #ifdef CONFIG_NF_CONNTRACK_MARK
713 if ((events
& (1 << IPCT_MARK
) || ct
->mark
)
714 && ctnetlink_dump_mark(skb
, ct
) < 0)
715 goto nla_put_failure
;
720 err
= nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
,
722 if (err
== -ENOBUFS
|| err
== -EAGAIN
)
729 nlmsg_cancel(skb
, nlh
);
733 if (nfnetlink_set_err(net
, 0, group
, -ENOBUFS
) > 0)
738 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
740 static int ctnetlink_done(struct netlink_callback
*cb
)
743 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
749 struct ctnetlink_dump_filter
{
757 ctnetlink_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
759 struct net
*net
= sock_net(skb
->sk
);
760 struct nf_conn
*ct
, *last
;
761 struct nf_conntrack_tuple_hash
*h
;
762 struct hlist_nulls_node
*n
;
763 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
764 u_int8_t l3proto
= nfmsg
->nfgen_family
;
766 #ifdef CONFIG_NF_CONNTRACK_MARK
767 const struct ctnetlink_dump_filter
*filter
= cb
->data
;
770 spin_lock_bh(&nf_conntrack_lock
);
771 last
= (struct nf_conn
*)cb
->args
[1];
772 for (; cb
->args
[0] < net
->ct
.htable_size
; cb
->args
[0]++) {
774 hlist_nulls_for_each_entry(h
, n
, &net
->ct
.hash
[cb
->args
[0]],
776 if (NF_CT_DIRECTION(h
) != IP_CT_DIR_ORIGINAL
)
778 ct
= nf_ct_tuplehash_to_ctrack(h
);
779 /* Dump entries of a given L3 protocol number.
780 * If it is not specified, ie. l3proto == 0,
781 * then dump everything. */
782 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
789 #ifdef CONFIG_NF_CONNTRACK_MARK
790 if (filter
&& !((ct
->mark
& filter
->mark
.mask
) ==
797 ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
799 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
803 nf_conntrack_get(&ct
->ct_general
);
804 cb
->args
[1] = (unsigned long)ct
;
814 spin_unlock_bh(&nf_conntrack_lock
);
822 ctnetlink_parse_tuple_ip(struct nlattr
*attr
, struct nf_conntrack_tuple
*tuple
)
824 struct nlattr
*tb
[CTA_IP_MAX
+1];
825 struct nf_conntrack_l3proto
*l3proto
;
828 ret
= nla_parse_nested(tb
, CTA_IP_MAX
, attr
, NULL
);
833 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
835 if (likely(l3proto
->nlattr_to_tuple
)) {
836 ret
= nla_validate_nested(attr
, CTA_IP_MAX
,
837 l3proto
->nla_policy
);
839 ret
= l3proto
->nlattr_to_tuple(tb
, tuple
);
847 static const struct nla_policy proto_nla_policy
[CTA_PROTO_MAX
+1] = {
848 [CTA_PROTO_NUM
] = { .type
= NLA_U8
},
852 ctnetlink_parse_tuple_proto(struct nlattr
*attr
,
853 struct nf_conntrack_tuple
*tuple
)
855 struct nlattr
*tb
[CTA_PROTO_MAX
+1];
856 struct nf_conntrack_l4proto
*l4proto
;
859 ret
= nla_parse_nested(tb
, CTA_PROTO_MAX
, attr
, proto_nla_policy
);
863 if (!tb
[CTA_PROTO_NUM
])
865 tuple
->dst
.protonum
= nla_get_u8(tb
[CTA_PROTO_NUM
]);
868 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
, tuple
->dst
.protonum
);
870 if (likely(l4proto
->nlattr_to_tuple
)) {
871 ret
= nla_validate_nested(attr
, CTA_PROTO_MAX
,
872 l4proto
->nla_policy
);
874 ret
= l4proto
->nlattr_to_tuple(tb
, tuple
);
882 static const struct nla_policy tuple_nla_policy
[CTA_TUPLE_MAX
+1] = {
883 [CTA_TUPLE_IP
] = { .type
= NLA_NESTED
},
884 [CTA_TUPLE_PROTO
] = { .type
= NLA_NESTED
},
888 ctnetlink_parse_tuple(const struct nlattr
* const cda
[],
889 struct nf_conntrack_tuple
*tuple
,
890 enum ctattr_type type
, u_int8_t l3num
)
892 struct nlattr
*tb
[CTA_TUPLE_MAX
+1];
895 memset(tuple
, 0, sizeof(*tuple
));
897 err
= nla_parse_nested(tb
, CTA_TUPLE_MAX
, cda
[type
], tuple_nla_policy
);
901 if (!tb
[CTA_TUPLE_IP
])
904 tuple
->src
.l3num
= l3num
;
906 err
= ctnetlink_parse_tuple_ip(tb
[CTA_TUPLE_IP
], tuple
);
910 if (!tb
[CTA_TUPLE_PROTO
])
913 err
= ctnetlink_parse_tuple_proto(tb
[CTA_TUPLE_PROTO
], tuple
);
917 /* orig and expect tuples get DIR_ORIGINAL */
918 if (type
== CTA_TUPLE_REPLY
)
919 tuple
->dst
.dir
= IP_CT_DIR_REPLY
;
921 tuple
->dst
.dir
= IP_CT_DIR_ORIGINAL
;
927 ctnetlink_parse_zone(const struct nlattr
*attr
, u16
*zone
)
930 #ifdef CONFIG_NF_CONNTRACK_ZONES
931 *zone
= ntohs(nla_get_be16(attr
));
941 static const struct nla_policy help_nla_policy
[CTA_HELP_MAX
+1] = {
942 [CTA_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
943 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
947 ctnetlink_parse_help(const struct nlattr
*attr
, char **helper_name
,
948 struct nlattr
**helpinfo
)
951 struct nlattr
*tb
[CTA_HELP_MAX
+1];
953 err
= nla_parse_nested(tb
, CTA_HELP_MAX
, attr
, help_nla_policy
);
957 if (!tb
[CTA_HELP_NAME
])
960 *helper_name
= nla_data(tb
[CTA_HELP_NAME
]);
962 if (tb
[CTA_HELP_INFO
])
963 *helpinfo
= tb
[CTA_HELP_INFO
];
968 #define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE)
969 static const struct nla_policy ct_nla_policy
[CTA_MAX
+1] = {
970 [CTA_TUPLE_ORIG
] = { .type
= NLA_NESTED
},
971 [CTA_TUPLE_REPLY
] = { .type
= NLA_NESTED
},
972 [CTA_STATUS
] = { .type
= NLA_U32
},
973 [CTA_PROTOINFO
] = { .type
= NLA_NESTED
},
974 [CTA_HELP
] = { .type
= NLA_NESTED
},
975 [CTA_NAT_SRC
] = { .type
= NLA_NESTED
},
976 [CTA_TIMEOUT
] = { .type
= NLA_U32
},
977 [CTA_MARK
] = { .type
= NLA_U32
},
978 [CTA_ID
] = { .type
= NLA_U32
},
979 [CTA_NAT_DST
] = { .type
= NLA_NESTED
},
980 [CTA_TUPLE_MASTER
] = { .type
= NLA_NESTED
},
981 [CTA_NAT_SEQ_ADJ_ORIG
] = { .type
= NLA_NESTED
},
982 [CTA_NAT_SEQ_ADJ_REPLY
] = { .type
= NLA_NESTED
},
983 [CTA_ZONE
] = { .type
= NLA_U16
},
984 [CTA_MARK_MASK
] = { .type
= NLA_U32
},
985 [CTA_LABELS
] = { .type
= NLA_BINARY
,
986 .len
= __CTA_LABELS_MAX_LENGTH
},
987 [CTA_LABELS_MASK
] = { .type
= NLA_BINARY
,
988 .len
= __CTA_LABELS_MAX_LENGTH
},
992 ctnetlink_del_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
993 const struct nlmsghdr
*nlh
,
994 const struct nlattr
* const cda
[])
996 struct net
*net
= sock_net(ctnl
);
997 struct nf_conntrack_tuple_hash
*h
;
998 struct nf_conntrack_tuple tuple
;
1000 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1001 u_int8_t u3
= nfmsg
->nfgen_family
;
1005 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1009 if (cda
[CTA_TUPLE_ORIG
])
1010 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
1011 else if (cda
[CTA_TUPLE_REPLY
])
1012 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
1014 /* Flush the whole table */
1015 nf_conntrack_flush_report(net
,
1016 NETLINK_CB(skb
).portid
,
1024 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
1028 ct
= nf_ct_tuplehash_to_ctrack(h
);
1031 u_int32_t id
= ntohl(nla_get_be32(cda
[CTA_ID
]));
1032 if (id
!= (u32
)(unsigned long)ct
) {
1038 if (del_timer(&ct
->timeout
))
1039 nf_ct_delete(ct
, NETLINK_CB(skb
).portid
, nlmsg_report(nlh
));
1047 ctnetlink_get_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1048 const struct nlmsghdr
*nlh
,
1049 const struct nlattr
* const cda
[])
1051 struct net
*net
= sock_net(ctnl
);
1052 struct nf_conntrack_tuple_hash
*h
;
1053 struct nf_conntrack_tuple tuple
;
1055 struct sk_buff
*skb2
= NULL
;
1056 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1057 u_int8_t u3
= nfmsg
->nfgen_family
;
1061 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1062 struct netlink_dump_control c
= {
1063 .dump
= ctnetlink_dump_table
,
1064 .done
= ctnetlink_done
,
1066 #ifdef CONFIG_NF_CONNTRACK_MARK
1067 if (cda
[CTA_MARK
] && cda
[CTA_MARK_MASK
]) {
1068 struct ctnetlink_dump_filter
*filter
;
1070 filter
= kzalloc(sizeof(struct ctnetlink_dump_filter
),
1075 filter
->mark
.val
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1077 ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
1081 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1084 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1088 if (cda
[CTA_TUPLE_ORIG
])
1089 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
1090 else if (cda
[CTA_TUPLE_REPLY
])
1091 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
1098 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
1102 ct
= nf_ct_tuplehash_to_ctrack(h
);
1105 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1112 err
= ctnetlink_fill_info(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
,
1113 NFNL_MSG_TYPE(nlh
->nlmsg_type
), ct
);
1119 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1128 /* this avoids a loop in nfnetlink. */
1129 return err
== -EAGAIN
? -ENOBUFS
: err
;
1132 static int ctnetlink_done_list(struct netlink_callback
*cb
)
1135 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
1140 ctnetlink_dump_list(struct sk_buff
*skb
, struct netlink_callback
*cb
,
1141 struct hlist_nulls_head
*list
)
1143 struct nf_conn
*ct
, *last
;
1144 struct nf_conntrack_tuple_hash
*h
;
1145 struct hlist_nulls_node
*n
;
1146 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
1147 u_int8_t l3proto
= nfmsg
->nfgen_family
;
1153 spin_lock_bh(&nf_conntrack_lock
);
1154 last
= (struct nf_conn
*)cb
->args
[1];
1156 hlist_nulls_for_each_entry(h
, n
, list
, hnnode
) {
1157 ct
= nf_ct_tuplehash_to_ctrack(h
);
1158 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
1166 res
= ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
1168 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
1172 nf_conntrack_get(&ct
->ct_general
);
1173 cb
->args
[1] = (unsigned long)ct
;
1183 spin_unlock_bh(&nf_conntrack_lock
);
1191 ctnetlink_dump_dying(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1193 struct net
*net
= sock_net(skb
->sk
);
1195 return ctnetlink_dump_list(skb
, cb
, &net
->ct
.dying
);
1199 ctnetlink_get_ct_dying(struct sock
*ctnl
, struct sk_buff
*skb
,
1200 const struct nlmsghdr
*nlh
,
1201 const struct nlattr
* const cda
[])
1203 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1204 struct netlink_dump_control c
= {
1205 .dump
= ctnetlink_dump_dying
,
1206 .done
= ctnetlink_done_list
,
1208 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1215 ctnetlink_dump_unconfirmed(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1217 struct net
*net
= sock_net(skb
->sk
);
1219 return ctnetlink_dump_list(skb
, cb
, &net
->ct
.unconfirmed
);
1223 ctnetlink_get_ct_unconfirmed(struct sock
*ctnl
, struct sk_buff
*skb
,
1224 const struct nlmsghdr
*nlh
,
1225 const struct nlattr
* const cda
[])
1227 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1228 struct netlink_dump_control c
= {
1229 .dump
= ctnetlink_dump_unconfirmed
,
1230 .done
= ctnetlink_done_list
,
1232 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1238 #ifdef CONFIG_NF_NAT_NEEDED
1240 ctnetlink_parse_nat_setup(struct nf_conn
*ct
,
1241 enum nf_nat_manip_type manip
,
1242 const struct nlattr
*attr
)
1244 typeof(nfnetlink_parse_nat_setup_hook
) parse_nat_setup
;
1247 parse_nat_setup
= rcu_dereference(nfnetlink_parse_nat_setup_hook
);
1248 if (!parse_nat_setup
) {
1249 #ifdef CONFIG_MODULES
1251 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1252 if (request_module("nf-nat") < 0) {
1253 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1257 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1259 if (nfnetlink_parse_nat_setup_hook
)
1265 err
= parse_nat_setup(ct
, manip
, attr
);
1266 if (err
== -EAGAIN
) {
1267 #ifdef CONFIG_MODULES
1269 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1270 if (request_module("nf-nat-%u", nf_ct_l3num(ct
)) < 0) {
1271 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1275 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1286 ctnetlink_change_status(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1289 unsigned int status
= ntohl(nla_get_be32(cda
[CTA_STATUS
]));
1290 d
= ct
->status
^ status
;
1292 if (d
& (IPS_EXPECTED
|IPS_CONFIRMED
|IPS_DYING
))
1296 if (d
& IPS_SEEN_REPLY
&& !(status
& IPS_SEEN_REPLY
))
1297 /* SEEN_REPLY bit can only be set */
1300 if (d
& IPS_ASSURED
&& !(status
& IPS_ASSURED
))
1301 /* ASSURED bit can only be set */
1304 /* Be careful here, modifying NAT bits can screw up things,
1305 * so don't let users modify them directly if they don't pass
1307 ct
->status
|= status
& ~(IPS_NAT_DONE_MASK
| IPS_NAT_MASK
);
1312 ctnetlink_change_nat(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1314 #ifdef CONFIG_NF_NAT_NEEDED
1317 if (cda
[CTA_NAT_DST
]) {
1318 ret
= ctnetlink_parse_nat_setup(ct
,
1324 if (cda
[CTA_NAT_SRC
]) {
1325 ret
= ctnetlink_parse_nat_setup(ct
,
1338 ctnetlink_change_helper(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1340 struct nf_conntrack_helper
*helper
;
1341 struct nf_conn_help
*help
= nfct_help(ct
);
1342 char *helpname
= NULL
;
1343 struct nlattr
*helpinfo
= NULL
;
1346 /* don't change helper of sibling connections */
1350 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1354 if (!strcmp(helpname
, "")) {
1355 if (help
&& help
->helper
) {
1356 /* we had a helper before ... */
1357 nf_ct_remove_expectations(ct
);
1358 RCU_INIT_POINTER(help
->helper
, NULL
);
1364 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1365 nf_ct_protonum(ct
));
1366 if (helper
== NULL
) {
1367 #ifdef CONFIG_MODULES
1368 spin_unlock_bh(&nf_conntrack_lock
);
1370 if (request_module("nfct-helper-%s", helpname
) < 0) {
1371 spin_lock_bh(&nf_conntrack_lock
);
1375 spin_lock_bh(&nf_conntrack_lock
);
1376 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1377 nf_ct_protonum(ct
));
1385 if (help
->helper
== helper
) {
1386 /* update private helper data if allowed. */
1387 if (helper
->from_nlattr
)
1388 helper
->from_nlattr(helpinfo
, ct
);
1394 /* we cannot set a helper for an existing conntrack */
1399 ctnetlink_change_timeout(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1401 u_int32_t timeout
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1403 if (!del_timer(&ct
->timeout
))
1406 ct
->timeout
.expires
= jiffies
+ timeout
* HZ
;
1407 add_timer(&ct
->timeout
);
1412 static const struct nla_policy protoinfo_policy
[CTA_PROTOINFO_MAX
+1] = {
1413 [CTA_PROTOINFO_TCP
] = { .type
= NLA_NESTED
},
1414 [CTA_PROTOINFO_DCCP
] = { .type
= NLA_NESTED
},
1415 [CTA_PROTOINFO_SCTP
] = { .type
= NLA_NESTED
},
1419 ctnetlink_change_protoinfo(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1421 const struct nlattr
*attr
= cda
[CTA_PROTOINFO
];
1422 struct nlattr
*tb
[CTA_PROTOINFO_MAX
+1];
1423 struct nf_conntrack_l4proto
*l4proto
;
1426 err
= nla_parse_nested(tb
, CTA_PROTOINFO_MAX
, attr
, protoinfo_policy
);
1431 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
1432 if (l4proto
->from_nlattr
)
1433 err
= l4proto
->from_nlattr(tb
, ct
);
1439 static const struct nla_policy seqadj_policy
[CTA_SEQADJ_MAX
+1] = {
1440 [CTA_SEQADJ_CORRECTION_POS
] = { .type
= NLA_U32
},
1441 [CTA_SEQADJ_OFFSET_BEFORE
] = { .type
= NLA_U32
},
1442 [CTA_SEQADJ_OFFSET_AFTER
] = { .type
= NLA_U32
},
1446 change_seq_adj(struct nf_ct_seqadj
*seq
, const struct nlattr
* const attr
)
1449 struct nlattr
*cda
[CTA_SEQADJ_MAX
+1];
1451 err
= nla_parse_nested(cda
, CTA_SEQADJ_MAX
, attr
, seqadj_policy
);
1455 if (!cda
[CTA_SEQADJ_CORRECTION_POS
])
1458 seq
->correction_pos
=
1459 ntohl(nla_get_be32(cda
[CTA_SEQADJ_CORRECTION_POS
]));
1461 if (!cda
[CTA_SEQADJ_OFFSET_BEFORE
])
1464 seq
->offset_before
=
1465 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_BEFORE
]));
1467 if (!cda
[CTA_SEQADJ_OFFSET_AFTER
])
1471 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_AFTER
]));
1477 ctnetlink_change_seq_adj(struct nf_conn
*ct
,
1478 const struct nlattr
* const cda
[])
1480 struct nf_conn_seqadj
*seqadj
= nfct_seqadj(ct
);
1486 if (cda
[CTA_SEQ_ADJ_ORIG
]) {
1487 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_ORIGINAL
],
1488 cda
[CTA_SEQ_ADJ_ORIG
]);
1492 ct
->status
|= IPS_SEQ_ADJUST
;
1495 if (cda
[CTA_SEQ_ADJ_REPLY
]) {
1496 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_REPLY
],
1497 cda
[CTA_SEQ_ADJ_REPLY
]);
1501 ct
->status
|= IPS_SEQ_ADJUST
;
1508 ctnetlink_attach_labels(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1510 #ifdef CONFIG_NF_CONNTRACK_LABELS
1511 size_t len
= nla_len(cda
[CTA_LABELS
]);
1512 const void *mask
= cda
[CTA_LABELS_MASK
];
1514 if (len
& (sizeof(u32
)-1)) /* must be multiple of u32 */
1518 if (nla_len(cda
[CTA_LABELS_MASK
]) == 0 ||
1519 nla_len(cda
[CTA_LABELS_MASK
]) != len
)
1521 mask
= nla_data(cda
[CTA_LABELS_MASK
]);
1526 return nf_connlabels_replace(ct
, nla_data(cda
[CTA_LABELS
]), mask
, len
);
1533 ctnetlink_change_conntrack(struct nf_conn
*ct
,
1534 const struct nlattr
* const cda
[])
1538 /* only allow NAT changes and master assignation for new conntracks */
1539 if (cda
[CTA_NAT_SRC
] || cda
[CTA_NAT_DST
] || cda
[CTA_TUPLE_MASTER
])
1542 if (cda
[CTA_HELP
]) {
1543 err
= ctnetlink_change_helper(ct
, cda
);
1548 if (cda
[CTA_TIMEOUT
]) {
1549 err
= ctnetlink_change_timeout(ct
, cda
);
1554 if (cda
[CTA_STATUS
]) {
1555 err
= ctnetlink_change_status(ct
, cda
);
1560 if (cda
[CTA_PROTOINFO
]) {
1561 err
= ctnetlink_change_protoinfo(ct
, cda
);
1566 #if defined(CONFIG_NF_CONNTRACK_MARK)
1568 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1571 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1572 err
= ctnetlink_change_seq_adj(ct
, cda
);
1577 if (cda
[CTA_LABELS
]) {
1578 err
= ctnetlink_attach_labels(ct
, cda
);
1586 static struct nf_conn
*
1587 ctnetlink_create_conntrack(struct net
*net
, u16 zone
,
1588 const struct nlattr
* const cda
[],
1589 struct nf_conntrack_tuple
*otuple
,
1590 struct nf_conntrack_tuple
*rtuple
,
1595 struct nf_conntrack_helper
*helper
;
1596 struct nf_conn_tstamp
*tstamp
;
1598 ct
= nf_conntrack_alloc(net
, zone
, otuple
, rtuple
, GFP_ATOMIC
);
1600 return ERR_PTR(-ENOMEM
);
1602 if (!cda
[CTA_TIMEOUT
])
1604 ct
->timeout
.expires
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1606 ct
->timeout
.expires
= jiffies
+ ct
->timeout
.expires
* HZ
;
1609 if (cda
[CTA_HELP
]) {
1610 char *helpname
= NULL
;
1611 struct nlattr
*helpinfo
= NULL
;
1613 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1617 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1618 nf_ct_protonum(ct
));
1619 if (helper
== NULL
) {
1621 #ifdef CONFIG_MODULES
1622 if (request_module("nfct-helper-%s", helpname
) < 0) {
1628 helper
= __nf_conntrack_helper_find(helpname
,
1630 nf_ct_protonum(ct
));
1640 struct nf_conn_help
*help
;
1642 help
= nf_ct_helper_ext_add(ct
, helper
, GFP_ATOMIC
);
1647 /* set private helper data if allowed. */
1648 if (helper
->from_nlattr
)
1649 helper
->from_nlattr(helpinfo
, ct
);
1651 /* not in hash table yet so not strictly necessary */
1652 RCU_INIT_POINTER(help
->helper
, helper
);
1655 /* try an implicit helper assignation */
1656 err
= __nf_ct_try_assign_helper(ct
, NULL
, GFP_ATOMIC
);
1661 if (cda
[CTA_NAT_SRC
] || cda
[CTA_NAT_DST
]) {
1662 err
= ctnetlink_change_nat(ct
, cda
);
1667 nf_ct_acct_ext_add(ct
, GFP_ATOMIC
);
1668 nf_ct_tstamp_ext_add(ct
, GFP_ATOMIC
);
1669 nf_ct_ecache_ext_add(ct
, 0, 0, GFP_ATOMIC
);
1670 nf_ct_labels_ext_add(ct
);
1672 /* we must add conntrack extensions before confirmation. */
1673 ct
->status
|= IPS_CONFIRMED
;
1675 if (cda
[CTA_STATUS
]) {
1676 err
= ctnetlink_change_status(ct
, cda
);
1681 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1682 err
= ctnetlink_change_seq_adj(ct
, cda
);
1687 memset(&ct
->proto
, 0, sizeof(ct
->proto
));
1688 if (cda
[CTA_PROTOINFO
]) {
1689 err
= ctnetlink_change_protoinfo(ct
, cda
);
1694 #if defined(CONFIG_NF_CONNTRACK_MARK)
1696 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1699 /* setup master conntrack: this is a confirmed expectation */
1700 if (cda
[CTA_TUPLE_MASTER
]) {
1701 struct nf_conntrack_tuple master
;
1702 struct nf_conntrack_tuple_hash
*master_h
;
1703 struct nf_conn
*master_ct
;
1705 err
= ctnetlink_parse_tuple(cda
, &master
, CTA_TUPLE_MASTER
, u3
);
1709 master_h
= nf_conntrack_find_get(net
, zone
, &master
);
1710 if (master_h
== NULL
) {
1714 master_ct
= nf_ct_tuplehash_to_ctrack(master_h
);
1715 __set_bit(IPS_EXPECTED_BIT
, &ct
->status
);
1716 ct
->master
= master_ct
;
1718 tstamp
= nf_conn_tstamp_find(ct
);
1720 tstamp
->start
= ktime_to_ns(ktime_get_real());
1722 err
= nf_conntrack_hash_check_insert(ct
);
1733 nf_conntrack_free(ct
);
1734 return ERR_PTR(err
);
1738 ctnetlink_new_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1739 const struct nlmsghdr
*nlh
,
1740 const struct nlattr
* const cda
[])
1742 struct net
*net
= sock_net(ctnl
);
1743 struct nf_conntrack_tuple otuple
, rtuple
;
1744 struct nf_conntrack_tuple_hash
*h
= NULL
;
1745 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1747 u_int8_t u3
= nfmsg
->nfgen_family
;
1751 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1755 if (cda
[CTA_TUPLE_ORIG
]) {
1756 err
= ctnetlink_parse_tuple(cda
, &otuple
, CTA_TUPLE_ORIG
, u3
);
1761 if (cda
[CTA_TUPLE_REPLY
]) {
1762 err
= ctnetlink_parse_tuple(cda
, &rtuple
, CTA_TUPLE_REPLY
, u3
);
1767 if (cda
[CTA_TUPLE_ORIG
])
1768 h
= nf_conntrack_find_get(net
, zone
, &otuple
);
1769 else if (cda
[CTA_TUPLE_REPLY
])
1770 h
= nf_conntrack_find_get(net
, zone
, &rtuple
);
1774 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
1775 enum ip_conntrack_events events
;
1777 if (!cda
[CTA_TUPLE_ORIG
] || !cda
[CTA_TUPLE_REPLY
])
1780 ct
= ctnetlink_create_conntrack(net
, zone
, cda
, &otuple
,
1786 if (test_bit(IPS_EXPECTED_BIT
, &ct
->status
))
1787 events
= IPCT_RELATED
;
1791 if (cda
[CTA_LABELS
] &&
1792 ctnetlink_attach_labels(ct
, cda
) == 0)
1793 events
|= (1 << IPCT_LABEL
);
1795 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1796 (1 << IPCT_ASSURED
) |
1797 (1 << IPCT_HELPER
) |
1798 (1 << IPCT_PROTOINFO
) |
1799 (1 << IPCT_SEQADJ
) |
1800 (1 << IPCT_MARK
) | events
,
1801 ct
, NETLINK_CB(skb
).portid
,
1808 /* implicit 'else' */
1811 ct
= nf_ct_tuplehash_to_ctrack(h
);
1812 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
)) {
1813 spin_lock_bh(&nf_conntrack_lock
);
1814 err
= ctnetlink_change_conntrack(ct
, cda
);
1815 spin_unlock_bh(&nf_conntrack_lock
);
1817 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1818 (1 << IPCT_ASSURED
) |
1819 (1 << IPCT_HELPER
) |
1821 (1 << IPCT_PROTOINFO
) |
1822 (1 << IPCT_SEQADJ
) |
1824 ct
, NETLINK_CB(skb
).portid
,
1834 ctnetlink_ct_stat_cpu_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
1835 __u16 cpu
, const struct ip_conntrack_stat
*st
)
1837 struct nlmsghdr
*nlh
;
1838 struct nfgenmsg
*nfmsg
;
1839 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1841 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS_CPU
);
1842 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1846 nfmsg
= nlmsg_data(nlh
);
1847 nfmsg
->nfgen_family
= AF_UNSPEC
;
1848 nfmsg
->version
= NFNETLINK_V0
;
1849 nfmsg
->res_id
= htons(cpu
);
1851 if (nla_put_be32(skb
, CTA_STATS_SEARCHED
, htonl(st
->searched
)) ||
1852 nla_put_be32(skb
, CTA_STATS_FOUND
, htonl(st
->found
)) ||
1853 nla_put_be32(skb
, CTA_STATS_NEW
, htonl(st
->new)) ||
1854 nla_put_be32(skb
, CTA_STATS_INVALID
, htonl(st
->invalid
)) ||
1855 nla_put_be32(skb
, CTA_STATS_IGNORE
, htonl(st
->ignore
)) ||
1856 nla_put_be32(skb
, CTA_STATS_DELETE
, htonl(st
->delete)) ||
1857 nla_put_be32(skb
, CTA_STATS_DELETE_LIST
, htonl(st
->delete_list
)) ||
1858 nla_put_be32(skb
, CTA_STATS_INSERT
, htonl(st
->insert
)) ||
1859 nla_put_be32(skb
, CTA_STATS_INSERT_FAILED
,
1860 htonl(st
->insert_failed
)) ||
1861 nla_put_be32(skb
, CTA_STATS_DROP
, htonl(st
->drop
)) ||
1862 nla_put_be32(skb
, CTA_STATS_EARLY_DROP
, htonl(st
->early_drop
)) ||
1863 nla_put_be32(skb
, CTA_STATS_ERROR
, htonl(st
->error
)) ||
1864 nla_put_be32(skb
, CTA_STATS_SEARCH_RESTART
,
1865 htonl(st
->search_restart
)))
1866 goto nla_put_failure
;
1868 nlmsg_end(skb
, nlh
);
1873 nlmsg_cancel(skb
, nlh
);
1878 ctnetlink_ct_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1881 struct net
*net
= sock_net(skb
->sk
);
1883 if (cb
->args
[0] == nr_cpu_ids
)
1886 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
1887 const struct ip_conntrack_stat
*st
;
1889 if (!cpu_possible(cpu
))
1892 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
1893 if (ctnetlink_ct_stat_cpu_fill_info(skb
,
1894 NETLINK_CB(cb
->skb
).portid
,
1905 ctnetlink_stat_ct_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
1906 const struct nlmsghdr
*nlh
,
1907 const struct nlattr
* const cda
[])
1909 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1910 struct netlink_dump_control c
= {
1911 .dump
= ctnetlink_ct_stat_cpu_dump
,
1913 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1920 ctnetlink_stat_ct_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
1923 struct nlmsghdr
*nlh
;
1924 struct nfgenmsg
*nfmsg
;
1925 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1926 unsigned int nr_conntracks
= atomic_read(&net
->ct
.count
);
1928 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS
);
1929 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1933 nfmsg
= nlmsg_data(nlh
);
1934 nfmsg
->nfgen_family
= AF_UNSPEC
;
1935 nfmsg
->version
= NFNETLINK_V0
;
1938 if (nla_put_be32(skb
, CTA_STATS_GLOBAL_ENTRIES
, htonl(nr_conntracks
)))
1939 goto nla_put_failure
;
1941 nlmsg_end(skb
, nlh
);
1946 nlmsg_cancel(skb
, nlh
);
1951 ctnetlink_stat_ct(struct sock
*ctnl
, struct sk_buff
*skb
,
1952 const struct nlmsghdr
*nlh
,
1953 const struct nlattr
* const cda
[])
1955 struct sk_buff
*skb2
;
1958 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1962 err
= ctnetlink_stat_ct_fill_info(skb2
, NETLINK_CB(skb
).portid
,
1964 NFNL_MSG_TYPE(nlh
->nlmsg_type
),
1969 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1978 /* this avoids a loop in nfnetlink. */
1979 return err
== -EAGAIN
? -ENOBUFS
: err
;
1982 static const struct nla_policy exp_nla_policy
[CTA_EXPECT_MAX
+1] = {
1983 [CTA_EXPECT_MASTER
] = { .type
= NLA_NESTED
},
1984 [CTA_EXPECT_TUPLE
] = { .type
= NLA_NESTED
},
1985 [CTA_EXPECT_MASK
] = { .type
= NLA_NESTED
},
1986 [CTA_EXPECT_TIMEOUT
] = { .type
= NLA_U32
},
1987 [CTA_EXPECT_ID
] = { .type
= NLA_U32
},
1988 [CTA_EXPECT_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
1989 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
1990 [CTA_EXPECT_ZONE
] = { .type
= NLA_U16
},
1991 [CTA_EXPECT_FLAGS
] = { .type
= NLA_U32
},
1992 [CTA_EXPECT_CLASS
] = { .type
= NLA_U32
},
1993 [CTA_EXPECT_NAT
] = { .type
= NLA_NESTED
},
1994 [CTA_EXPECT_FN
] = { .type
= NLA_NUL_STRING
},
1997 static struct nf_conntrack_expect
*
1998 ctnetlink_alloc_expect(const struct nlattr
*const cda
[], struct nf_conn
*ct
,
1999 struct nf_conntrack_helper
*helper
,
2000 struct nf_conntrack_tuple
*tuple
,
2001 struct nf_conntrack_tuple
*mask
);
2003 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
2005 ctnetlink_nfqueue_build_size(const struct nf_conn
*ct
)
2007 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2008 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2009 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2010 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
2011 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
2012 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
2013 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
2014 + nla_total_size(0) /* CTA_PROTOINFO */
2015 + nla_total_size(0) /* CTA_HELP */
2016 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
2017 + ctnetlink_secctx_size(ct
)
2018 #ifdef CONFIG_NF_NAT_NEEDED
2019 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2020 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
2022 #ifdef CONFIG_NF_CONNTRACK_MARK
2023 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
2025 + ctnetlink_proto_size(ct
)
2030 ctnetlink_nfqueue_build(struct sk_buff
*skb
, struct nf_conn
*ct
)
2032 struct nlattr
*nest_parms
;
2035 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
2037 goto nla_put_failure
;
2038 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
2039 goto nla_put_failure
;
2040 nla_nest_end(skb
, nest_parms
);
2042 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
2044 goto nla_put_failure
;
2045 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
2046 goto nla_put_failure
;
2047 nla_nest_end(skb
, nest_parms
);
2049 if (nf_ct_zone(ct
)) {
2050 if (nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
2051 goto nla_put_failure
;
2054 if (ctnetlink_dump_id(skb
, ct
) < 0)
2055 goto nla_put_failure
;
2057 if (ctnetlink_dump_status(skb
, ct
) < 0)
2058 goto nla_put_failure
;
2060 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
2061 goto nla_put_failure
;
2063 if (ctnetlink_dump_protoinfo(skb
, ct
) < 0)
2064 goto nla_put_failure
;
2066 if (ctnetlink_dump_helpinfo(skb
, ct
) < 0)
2067 goto nla_put_failure
;
2069 #ifdef CONFIG_NF_CONNTRACK_SECMARK
2070 if (ct
->secmark
&& ctnetlink_dump_secctx(skb
, ct
) < 0)
2071 goto nla_put_failure
;
2073 if (ct
->master
&& ctnetlink_dump_master(skb
, ct
) < 0)
2074 goto nla_put_failure
;
2076 if ((ct
->status
& IPS_SEQ_ADJUST
) &&
2077 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
2078 goto nla_put_failure
;
2080 #ifdef CONFIG_NF_CONNTRACK_MARK
2081 if (ct
->mark
&& ctnetlink_dump_mark(skb
, ct
) < 0)
2082 goto nla_put_failure
;
2084 if (ctnetlink_dump_labels(skb
, ct
) < 0)
2085 goto nla_put_failure
;
2095 ctnetlink_nfqueue_parse_ct(const struct nlattr
*cda
[], struct nf_conn
*ct
)
2099 if (cda
[CTA_TIMEOUT
]) {
2100 err
= ctnetlink_change_timeout(ct
, cda
);
2104 if (cda
[CTA_STATUS
]) {
2105 err
= ctnetlink_change_status(ct
, cda
);
2109 if (cda
[CTA_HELP
]) {
2110 err
= ctnetlink_change_helper(ct
, cda
);
2114 if (cda
[CTA_LABELS
]) {
2115 err
= ctnetlink_attach_labels(ct
, cda
);
2119 #if defined(CONFIG_NF_CONNTRACK_MARK)
2121 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
2127 ctnetlink_nfqueue_parse(const struct nlattr
*attr
, struct nf_conn
*ct
)
2129 struct nlattr
*cda
[CTA_MAX
+1];
2132 ret
= nla_parse_nested(cda
, CTA_MAX
, attr
, ct_nla_policy
);
2136 spin_lock_bh(&nf_conntrack_lock
);
2137 ret
= ctnetlink_nfqueue_parse_ct((const struct nlattr
**)cda
, ct
);
2138 spin_unlock_bh(&nf_conntrack_lock
);
2143 static int ctnetlink_nfqueue_exp_parse(const struct nlattr
* const *cda
,
2144 const struct nf_conn
*ct
,
2145 struct nf_conntrack_tuple
*tuple
,
2146 struct nf_conntrack_tuple
*mask
)
2150 err
= ctnetlink_parse_tuple(cda
, tuple
, CTA_EXPECT_TUPLE
,
2155 return ctnetlink_parse_tuple(cda
, mask
, CTA_EXPECT_MASK
,
2160 ctnetlink_nfqueue_attach_expect(const struct nlattr
*attr
, struct nf_conn
*ct
,
2161 u32 portid
, u32 report
)
2163 struct nlattr
*cda
[CTA_EXPECT_MAX
+1];
2164 struct nf_conntrack_tuple tuple
, mask
;
2165 struct nf_conntrack_helper
*helper
= NULL
;
2166 struct nf_conntrack_expect
*exp
;
2169 err
= nla_parse_nested(cda
, CTA_EXPECT_MAX
, attr
, exp_nla_policy
);
2173 err
= ctnetlink_nfqueue_exp_parse((const struct nlattr
* const *)cda
,
2178 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2179 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2181 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
2182 nf_ct_protonum(ct
));
2187 exp
= ctnetlink_alloc_expect((const struct nlattr
* const *)cda
, ct
,
2188 helper
, &tuple
, &mask
);
2190 return PTR_ERR(exp
);
2192 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2194 nf_ct_expect_put(exp
);
2201 static struct nfq_ct_hook ctnetlink_nfqueue_hook
= {
2202 .build_size
= ctnetlink_nfqueue_build_size
,
2203 .build
= ctnetlink_nfqueue_build
,
2204 .parse
= ctnetlink_nfqueue_parse
,
2205 .attach_expect
= ctnetlink_nfqueue_attach_expect
,
2206 .seq_adjust
= nf_ct_tcp_seqadj_set
,
2208 #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
2210 /***********************************************************************
2212 ***********************************************************************/
2215 ctnetlink_exp_dump_tuple(struct sk_buff
*skb
,
2216 const struct nf_conntrack_tuple
*tuple
,
2217 enum ctattr_expect type
)
2219 struct nlattr
*nest_parms
;
2221 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
2223 goto nla_put_failure
;
2224 if (ctnetlink_dump_tuples(skb
, tuple
) < 0)
2225 goto nla_put_failure
;
2226 nla_nest_end(skb
, nest_parms
);
2235 ctnetlink_exp_dump_mask(struct sk_buff
*skb
,
2236 const struct nf_conntrack_tuple
*tuple
,
2237 const struct nf_conntrack_tuple_mask
*mask
)
2240 struct nf_conntrack_l3proto
*l3proto
;
2241 struct nf_conntrack_l4proto
*l4proto
;
2242 struct nf_conntrack_tuple m
;
2243 struct nlattr
*nest_parms
;
2245 memset(&m
, 0xFF, sizeof(m
));
2246 memcpy(&m
.src
.u3
, &mask
->src
.u3
, sizeof(m
.src
.u3
));
2247 m
.src
.u
.all
= mask
->src
.u
.all
;
2248 m
.dst
.protonum
= tuple
->dst
.protonum
;
2250 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_MASK
| NLA_F_NESTED
);
2252 goto nla_put_failure
;
2255 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
2256 ret
= ctnetlink_dump_tuples_ip(skb
, &m
, l3proto
);
2258 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
,
2259 tuple
->dst
.protonum
);
2260 ret
= ctnetlink_dump_tuples_proto(skb
, &m
, l4proto
);
2264 if (unlikely(ret
< 0))
2265 goto nla_put_failure
;
2267 nla_nest_end(skb
, nest_parms
);
2275 static const union nf_inet_addr any_addr
;
2278 ctnetlink_exp_dump_expect(struct sk_buff
*skb
,
2279 const struct nf_conntrack_expect
*exp
)
2281 struct nf_conn
*master
= exp
->master
;
2282 long timeout
= ((long)exp
->timeout
.expires
- (long)jiffies
) / HZ
;
2283 struct nf_conn_help
*help
;
2284 #ifdef CONFIG_NF_NAT_NEEDED
2285 struct nlattr
*nest_parms
;
2286 struct nf_conntrack_tuple nat_tuple
= {};
2288 struct nf_ct_helper_expectfn
*expfn
;
2293 if (ctnetlink_exp_dump_tuple(skb
, &exp
->tuple
, CTA_EXPECT_TUPLE
) < 0)
2294 goto nla_put_failure
;
2295 if (ctnetlink_exp_dump_mask(skb
, &exp
->tuple
, &exp
->mask
) < 0)
2296 goto nla_put_failure
;
2297 if (ctnetlink_exp_dump_tuple(skb
,
2298 &master
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
2299 CTA_EXPECT_MASTER
) < 0)
2300 goto nla_put_failure
;
2302 #ifdef CONFIG_NF_NAT_NEEDED
2303 if (!nf_inet_addr_cmp(&exp
->saved_addr
, &any_addr
) ||
2304 exp
->saved_proto
.all
) {
2305 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_NAT
| NLA_F_NESTED
);
2307 goto nla_put_failure
;
2309 if (nla_put_be32(skb
, CTA_EXPECT_NAT_DIR
, htonl(exp
->dir
)))
2310 goto nla_put_failure
;
2312 nat_tuple
.src
.l3num
= nf_ct_l3num(master
);
2313 nat_tuple
.src
.u3
= exp
->saved_addr
;
2314 nat_tuple
.dst
.protonum
= nf_ct_protonum(master
);
2315 nat_tuple
.src
.u
= exp
->saved_proto
;
2317 if (ctnetlink_exp_dump_tuple(skb
, &nat_tuple
,
2318 CTA_EXPECT_NAT_TUPLE
) < 0)
2319 goto nla_put_failure
;
2320 nla_nest_end(skb
, nest_parms
);
2323 if (nla_put_be32(skb
, CTA_EXPECT_TIMEOUT
, htonl(timeout
)) ||
2324 nla_put_be32(skb
, CTA_EXPECT_ID
, htonl((unsigned long)exp
)) ||
2325 nla_put_be32(skb
, CTA_EXPECT_FLAGS
, htonl(exp
->flags
)) ||
2326 nla_put_be32(skb
, CTA_EXPECT_CLASS
, htonl(exp
->class)))
2327 goto nla_put_failure
;
2328 help
= nfct_help(master
);
2330 struct nf_conntrack_helper
*helper
;
2332 helper
= rcu_dereference(help
->helper
);
2334 nla_put_string(skb
, CTA_EXPECT_HELP_NAME
, helper
->name
))
2335 goto nla_put_failure
;
2337 expfn
= nf_ct_helper_expectfn_find_by_symbol(exp
->expectfn
);
2338 if (expfn
!= NULL
&&
2339 nla_put_string(skb
, CTA_EXPECT_FN
, expfn
->name
))
2340 goto nla_put_failure
;
2349 ctnetlink_exp_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
2350 int event
, const struct nf_conntrack_expect
*exp
)
2352 struct nlmsghdr
*nlh
;
2353 struct nfgenmsg
*nfmsg
;
2354 unsigned int flags
= portid
? NLM_F_MULTI
: 0;
2356 event
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2357 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
2361 nfmsg
= nlmsg_data(nlh
);
2362 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2363 nfmsg
->version
= NFNETLINK_V0
;
2366 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2367 goto nla_put_failure
;
2369 nlmsg_end(skb
, nlh
);
2374 nlmsg_cancel(skb
, nlh
);
2378 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2380 ctnetlink_expect_event(unsigned int events
, struct nf_exp_event
*item
)
2382 struct nf_conntrack_expect
*exp
= item
->exp
;
2383 struct net
*net
= nf_ct_exp_net(exp
);
2384 struct nlmsghdr
*nlh
;
2385 struct nfgenmsg
*nfmsg
;
2386 struct sk_buff
*skb
;
2387 unsigned int type
, group
;
2390 if (events
& (1 << IPEXP_DESTROY
)) {
2391 type
= IPCTNL_MSG_EXP_DELETE
;
2392 group
= NFNLGRP_CONNTRACK_EXP_DESTROY
;
2393 } else if (events
& (1 << IPEXP_NEW
)) {
2394 type
= IPCTNL_MSG_EXP_NEW
;
2395 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
2396 group
= NFNLGRP_CONNTRACK_EXP_NEW
;
2400 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
2403 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
2407 type
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2408 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
2412 nfmsg
= nlmsg_data(nlh
);
2413 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2414 nfmsg
->version
= NFNETLINK_V0
;
2418 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2419 goto nla_put_failure
;
2422 nlmsg_end(skb
, nlh
);
2423 nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
, GFP_ATOMIC
);
2428 nlmsg_cancel(skb
, nlh
);
2432 nfnetlink_set_err(net
, 0, 0, -ENOBUFS
);
2436 static int ctnetlink_exp_done(struct netlink_callback
*cb
)
2439 nf_ct_expect_put((struct nf_conntrack_expect
*)cb
->args
[1]);
2444 ctnetlink_exp_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2446 struct net
*net
= sock_net(skb
->sk
);
2447 struct nf_conntrack_expect
*exp
, *last
;
2448 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2449 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2452 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2453 for (; cb
->args
[0] < nf_ct_expect_hsize
; cb
->args
[0]++) {
2455 hlist_for_each_entry(exp
, &net
->ct
.expect_hash
[cb
->args
[0]],
2457 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2464 if (ctnetlink_exp_fill_info(skb
,
2465 NETLINK_CB(cb
->skb
).portid
,
2469 if (!atomic_inc_not_zero(&exp
->use
))
2471 cb
->args
[1] = (unsigned long)exp
;
2483 nf_ct_expect_put(last
);
2489 ctnetlink_exp_ct_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2491 struct nf_conntrack_expect
*exp
, *last
;
2492 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2493 struct nf_conn
*ct
= cb
->data
;
2494 struct nf_conn_help
*help
= nfct_help(ct
);
2495 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2501 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2503 hlist_for_each_entry(exp
, &help
->expectations
, lnode
) {
2504 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2511 if (ctnetlink_exp_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
2515 if (!atomic_inc_not_zero(&exp
->use
))
2517 cb
->args
[1] = (unsigned long)exp
;
2529 nf_ct_expect_put(last
);
2534 static int ctnetlink_dump_exp_ct(struct sock
*ctnl
, struct sk_buff
*skb
,
2535 const struct nlmsghdr
*nlh
,
2536 const struct nlattr
* const cda
[])
2539 struct net
*net
= sock_net(ctnl
);
2540 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2541 u_int8_t u3
= nfmsg
->nfgen_family
;
2542 struct nf_conntrack_tuple tuple
;
2543 struct nf_conntrack_tuple_hash
*h
;
2546 struct netlink_dump_control c
= {
2547 .dump
= ctnetlink_exp_ct_dump_table
,
2548 .done
= ctnetlink_exp_done
,
2551 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
2555 if (cda
[CTA_EXPECT_ZONE
]) {
2556 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2561 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
2565 ct
= nf_ct_tuplehash_to_ctrack(h
);
2568 err
= netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2575 ctnetlink_get_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2576 const struct nlmsghdr
*nlh
,
2577 const struct nlattr
* const cda
[])
2579 struct net
*net
= sock_net(ctnl
);
2580 struct nf_conntrack_tuple tuple
;
2581 struct nf_conntrack_expect
*exp
;
2582 struct sk_buff
*skb2
;
2583 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2584 u_int8_t u3
= nfmsg
->nfgen_family
;
2588 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
2589 if (cda
[CTA_EXPECT_MASTER
])
2590 return ctnetlink_dump_exp_ct(ctnl
, skb
, nlh
, cda
);
2592 struct netlink_dump_control c
= {
2593 .dump
= ctnetlink_exp_dump_table
,
2594 .done
= ctnetlink_exp_done
,
2596 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2600 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2604 if (cda
[CTA_EXPECT_TUPLE
])
2605 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2606 else if (cda
[CTA_EXPECT_MASTER
])
2607 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
2614 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2618 if (cda
[CTA_EXPECT_ID
]) {
2619 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2620 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2621 nf_ct_expect_put(exp
);
2627 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
2629 nf_ct_expect_put(exp
);
2634 err
= ctnetlink_exp_fill_info(skb2
, NETLINK_CB(skb
).portid
,
2635 nlh
->nlmsg_seq
, IPCTNL_MSG_EXP_NEW
, exp
);
2637 nf_ct_expect_put(exp
);
2641 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
2650 /* this avoids a loop in nfnetlink. */
2651 return err
== -EAGAIN
? -ENOBUFS
: err
;
2655 ctnetlink_del_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2656 const struct nlmsghdr
*nlh
,
2657 const struct nlattr
* const cda
[])
2659 struct net
*net
= sock_net(ctnl
);
2660 struct nf_conntrack_expect
*exp
;
2661 struct nf_conntrack_tuple tuple
;
2662 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2663 struct hlist_node
*next
;
2664 u_int8_t u3
= nfmsg
->nfgen_family
;
2669 if (cda
[CTA_EXPECT_TUPLE
]) {
2670 /* delete a single expect by tuple */
2671 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2675 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2679 /* bump usage count to 2 */
2680 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2684 if (cda
[CTA_EXPECT_ID
]) {
2685 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2686 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2687 nf_ct_expect_put(exp
);
2692 /* after list removal, usage count == 1 */
2693 spin_lock_bh(&nf_conntrack_lock
);
2694 if (del_timer(&exp
->timeout
)) {
2695 nf_ct_unlink_expect_report(exp
, NETLINK_CB(skb
).portid
,
2697 nf_ct_expect_put(exp
);
2699 spin_unlock_bh(&nf_conntrack_lock
);
2700 /* have to put what we 'get' above.
2701 * after this line usage count == 0 */
2702 nf_ct_expect_put(exp
);
2703 } else if (cda
[CTA_EXPECT_HELP_NAME
]) {
2704 char *name
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2705 struct nf_conn_help
*m_help
;
2707 /* delete all expectations for this helper */
2708 spin_lock_bh(&nf_conntrack_lock
);
2709 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2710 hlist_for_each_entry_safe(exp
, next
,
2711 &net
->ct
.expect_hash
[i
],
2713 m_help
= nfct_help(exp
->master
);
2714 if (!strcmp(m_help
->helper
->name
, name
) &&
2715 del_timer(&exp
->timeout
)) {
2716 nf_ct_unlink_expect_report(exp
,
2717 NETLINK_CB(skb
).portid
,
2719 nf_ct_expect_put(exp
);
2723 spin_unlock_bh(&nf_conntrack_lock
);
2725 /* This basically means we have to flush everything*/
2726 spin_lock_bh(&nf_conntrack_lock
);
2727 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2728 hlist_for_each_entry_safe(exp
, next
,
2729 &net
->ct
.expect_hash
[i
],
2731 if (del_timer(&exp
->timeout
)) {
2732 nf_ct_unlink_expect_report(exp
,
2733 NETLINK_CB(skb
).portid
,
2735 nf_ct_expect_put(exp
);
2739 spin_unlock_bh(&nf_conntrack_lock
);
2745 ctnetlink_change_expect(struct nf_conntrack_expect
*x
,
2746 const struct nlattr
* const cda
[])
2748 if (cda
[CTA_EXPECT_TIMEOUT
]) {
2749 if (!del_timer(&x
->timeout
))
2752 x
->timeout
.expires
= jiffies
+
2753 ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2754 add_timer(&x
->timeout
);
2759 static const struct nla_policy exp_nat_nla_policy
[CTA_EXPECT_NAT_MAX
+1] = {
2760 [CTA_EXPECT_NAT_DIR
] = { .type
= NLA_U32
},
2761 [CTA_EXPECT_NAT_TUPLE
] = { .type
= NLA_NESTED
},
2765 ctnetlink_parse_expect_nat(const struct nlattr
*attr
,
2766 struct nf_conntrack_expect
*exp
,
2769 #ifdef CONFIG_NF_NAT_NEEDED
2770 struct nlattr
*tb
[CTA_EXPECT_NAT_MAX
+1];
2771 struct nf_conntrack_tuple nat_tuple
= {};
2774 err
= nla_parse_nested(tb
, CTA_EXPECT_NAT_MAX
, attr
, exp_nat_nla_policy
);
2778 if (!tb
[CTA_EXPECT_NAT_DIR
] || !tb
[CTA_EXPECT_NAT_TUPLE
])
2781 err
= ctnetlink_parse_tuple((const struct nlattr
* const *)tb
,
2782 &nat_tuple
, CTA_EXPECT_NAT_TUPLE
, u3
);
2786 exp
->saved_addr
= nat_tuple
.src
.u3
;
2787 exp
->saved_proto
= nat_tuple
.src
.u
;
2788 exp
->dir
= ntohl(nla_get_be32(tb
[CTA_EXPECT_NAT_DIR
]));
2796 static struct nf_conntrack_expect
*
2797 ctnetlink_alloc_expect(const struct nlattr
* const cda
[], struct nf_conn
*ct
,
2798 struct nf_conntrack_helper
*helper
,
2799 struct nf_conntrack_tuple
*tuple
,
2800 struct nf_conntrack_tuple
*mask
)
2802 u_int32_t
class = 0;
2803 struct nf_conntrack_expect
*exp
;
2804 struct nf_conn_help
*help
;
2807 if (cda
[CTA_EXPECT_CLASS
] && helper
) {
2808 class = ntohl(nla_get_be32(cda
[CTA_EXPECT_CLASS
]));
2809 if (class > helper
->expect_class_max
)
2810 return ERR_PTR(-EINVAL
);
2812 exp
= nf_ct_expect_alloc(ct
);
2814 return ERR_PTR(-ENOMEM
);
2816 help
= nfct_help(ct
);
2818 if (!cda
[CTA_EXPECT_TIMEOUT
]) {
2822 exp
->timeout
.expires
=
2823 jiffies
+ ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2825 exp
->flags
= NF_CT_EXPECT_USERSPACE
;
2826 if (cda
[CTA_EXPECT_FLAGS
]) {
2828 ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2831 if (cda
[CTA_EXPECT_FLAGS
]) {
2832 exp
->flags
= ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2833 exp
->flags
&= ~NF_CT_EXPECT_USERSPACE
;
2837 if (cda
[CTA_EXPECT_FN
]) {
2838 const char *name
= nla_data(cda
[CTA_EXPECT_FN
]);
2839 struct nf_ct_helper_expectfn
*expfn
;
2841 expfn
= nf_ct_helper_expectfn_find_by_name(name
);
2842 if (expfn
== NULL
) {
2846 exp
->expectfn
= expfn
->expectfn
;
2848 exp
->expectfn
= NULL
;
2852 exp
->helper
= helper
;
2853 exp
->tuple
= *tuple
;
2854 exp
->mask
.src
.u3
= mask
->src
.u3
;
2855 exp
->mask
.src
.u
.all
= mask
->src
.u
.all
;
2857 if (cda
[CTA_EXPECT_NAT
]) {
2858 err
= ctnetlink_parse_expect_nat(cda
[CTA_EXPECT_NAT
],
2859 exp
, nf_ct_l3num(ct
));
2865 nf_ct_expect_put(exp
);
2866 return ERR_PTR(err
);
2870 ctnetlink_create_expect(struct net
*net
, u16 zone
,
2871 const struct nlattr
* const cda
[],
2872 u_int8_t u3
, u32 portid
, int report
)
2874 struct nf_conntrack_tuple tuple
, mask
, master_tuple
;
2875 struct nf_conntrack_tuple_hash
*h
= NULL
;
2876 struct nf_conntrack_helper
*helper
= NULL
;
2877 struct nf_conntrack_expect
*exp
;
2881 /* caller guarantees that those three CTA_EXPECT_* exist */
2882 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2885 err
= ctnetlink_parse_tuple(cda
, &mask
, CTA_EXPECT_MASK
, u3
);
2888 err
= ctnetlink_parse_tuple(cda
, &master_tuple
, CTA_EXPECT_MASTER
, u3
);
2892 /* Look for master conntrack of this expectation */
2893 h
= nf_conntrack_find_get(net
, zone
, &master_tuple
);
2896 ct
= nf_ct_tuplehash_to_ctrack(h
);
2898 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2899 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2901 helper
= __nf_conntrack_helper_find(helpname
, u3
,
2902 nf_ct_protonum(ct
));
2903 if (helper
== NULL
) {
2904 #ifdef CONFIG_MODULES
2905 if (request_module("nfct-helper-%s", helpname
) < 0) {
2909 helper
= __nf_conntrack_helper_find(helpname
, u3
,
2910 nf_ct_protonum(ct
));
2921 exp
= ctnetlink_alloc_expect(cda
, ct
, helper
, &tuple
, &mask
);
2927 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2933 nf_ct_expect_put(exp
);
2940 ctnetlink_new_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2941 const struct nlmsghdr
*nlh
,
2942 const struct nlattr
* const cda
[])
2944 struct net
*net
= sock_net(ctnl
);
2945 struct nf_conntrack_tuple tuple
;
2946 struct nf_conntrack_expect
*exp
;
2947 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2948 u_int8_t u3
= nfmsg
->nfgen_family
;
2952 if (!cda
[CTA_EXPECT_TUPLE
]
2953 || !cda
[CTA_EXPECT_MASK
]
2954 || !cda
[CTA_EXPECT_MASTER
])
2957 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2961 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2965 spin_lock_bh(&nf_conntrack_lock
);
2966 exp
= __nf_ct_expect_find(net
, zone
, &tuple
);
2969 spin_unlock_bh(&nf_conntrack_lock
);
2971 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
2972 err
= ctnetlink_create_expect(net
, zone
, cda
,
2974 NETLINK_CB(skb
).portid
,
2981 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
))
2982 err
= ctnetlink_change_expect(exp
, cda
);
2983 spin_unlock_bh(&nf_conntrack_lock
);
2989 ctnetlink_exp_stat_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, int cpu
,
2990 const struct ip_conntrack_stat
*st
)
2992 struct nlmsghdr
*nlh
;
2993 struct nfgenmsg
*nfmsg
;
2994 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
2996 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_EXP_GET_STATS_CPU
);
2997 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
3001 nfmsg
= nlmsg_data(nlh
);
3002 nfmsg
->nfgen_family
= AF_UNSPEC
;
3003 nfmsg
->version
= NFNETLINK_V0
;
3004 nfmsg
->res_id
= htons(cpu
);
3006 if (nla_put_be32(skb
, CTA_STATS_EXP_NEW
, htonl(st
->expect_new
)) ||
3007 nla_put_be32(skb
, CTA_STATS_EXP_CREATE
, htonl(st
->expect_create
)) ||
3008 nla_put_be32(skb
, CTA_STATS_EXP_DELETE
, htonl(st
->expect_delete
)))
3009 goto nla_put_failure
;
3011 nlmsg_end(skb
, nlh
);
3016 nlmsg_cancel(skb
, nlh
);
3021 ctnetlink_exp_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3024 struct net
*net
= sock_net(skb
->sk
);
3026 if (cb
->args
[0] == nr_cpu_ids
)
3029 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
3030 const struct ip_conntrack_stat
*st
;
3032 if (!cpu_possible(cpu
))
3035 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
3036 if (ctnetlink_exp_stat_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
3047 ctnetlink_stat_exp_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
3048 const struct nlmsghdr
*nlh
,
3049 const struct nlattr
* const cda
[])
3051 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
3052 struct netlink_dump_control c
= {
3053 .dump
= ctnetlink_exp_stat_cpu_dump
,
3055 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
3061 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3062 static struct nf_ct_event_notifier ctnl_notifier
= {
3063 .fcn
= ctnetlink_conntrack_event
,
3066 static struct nf_exp_event_notifier ctnl_notifier_exp
= {
3067 .fcn
= ctnetlink_expect_event
,
3071 static const struct nfnl_callback ctnl_cb
[IPCTNL_MSG_MAX
] = {
3072 [IPCTNL_MSG_CT_NEW
] = { .call
= ctnetlink_new_conntrack
,
3073 .attr_count
= CTA_MAX
,
3074 .policy
= ct_nla_policy
},
3075 [IPCTNL_MSG_CT_GET
] = { .call
= ctnetlink_get_conntrack
,
3076 .attr_count
= CTA_MAX
,
3077 .policy
= ct_nla_policy
},
3078 [IPCTNL_MSG_CT_DELETE
] = { .call
= ctnetlink_del_conntrack
,
3079 .attr_count
= CTA_MAX
,
3080 .policy
= ct_nla_policy
},
3081 [IPCTNL_MSG_CT_GET_CTRZERO
] = { .call
= ctnetlink_get_conntrack
,
3082 .attr_count
= CTA_MAX
,
3083 .policy
= ct_nla_policy
},
3084 [IPCTNL_MSG_CT_GET_STATS_CPU
] = { .call
= ctnetlink_stat_ct_cpu
},
3085 [IPCTNL_MSG_CT_GET_STATS
] = { .call
= ctnetlink_stat_ct
},
3086 [IPCTNL_MSG_CT_GET_DYING
] = { .call
= ctnetlink_get_ct_dying
},
3087 [IPCTNL_MSG_CT_GET_UNCONFIRMED
] = { .call
= ctnetlink_get_ct_unconfirmed
},
3090 static const struct nfnl_callback ctnl_exp_cb
[IPCTNL_MSG_EXP_MAX
] = {
3091 [IPCTNL_MSG_EXP_GET
] = { .call
= ctnetlink_get_expect
,
3092 .attr_count
= CTA_EXPECT_MAX
,
3093 .policy
= exp_nla_policy
},
3094 [IPCTNL_MSG_EXP_NEW
] = { .call
= ctnetlink_new_expect
,
3095 .attr_count
= CTA_EXPECT_MAX
,
3096 .policy
= exp_nla_policy
},
3097 [IPCTNL_MSG_EXP_DELETE
] = { .call
= ctnetlink_del_expect
,
3098 .attr_count
= CTA_EXPECT_MAX
,
3099 .policy
= exp_nla_policy
},
3100 [IPCTNL_MSG_EXP_GET_STATS_CPU
] = { .call
= ctnetlink_stat_exp_cpu
},
3103 static const struct nfnetlink_subsystem ctnl_subsys
= {
3104 .name
= "conntrack",
3105 .subsys_id
= NFNL_SUBSYS_CTNETLINK
,
3106 .cb_count
= IPCTNL_MSG_MAX
,
3110 static const struct nfnetlink_subsystem ctnl_exp_subsys
= {
3111 .name
= "conntrack_expect",
3112 .subsys_id
= NFNL_SUBSYS_CTNETLINK_EXP
,
3113 .cb_count
= IPCTNL_MSG_EXP_MAX
,
3117 MODULE_ALIAS("ip_conntrack_netlink");
3118 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK
);
3119 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP
);
3121 static int __net_init
ctnetlink_net_init(struct net
*net
)
3123 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3126 ret
= nf_conntrack_register_notifier(net
, &ctnl_notifier
);
3128 pr_err("ctnetlink_init: cannot register notifier.\n");
3132 ret
= nf_ct_expect_register_notifier(net
, &ctnl_notifier_exp
);
3134 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3135 goto err_unreg_notifier
;
3140 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3142 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3148 static void ctnetlink_net_exit(struct net
*net
)
3150 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3151 nf_ct_expect_unregister_notifier(net
, &ctnl_notifier_exp
);
3152 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3156 static void __net_exit
ctnetlink_net_exit_batch(struct list_head
*net_exit_list
)
3160 list_for_each_entry(net
, net_exit_list
, exit_list
)
3161 ctnetlink_net_exit(net
);
3164 static struct pernet_operations ctnetlink_net_ops
= {
3165 .init
= ctnetlink_net_init
,
3166 .exit_batch
= ctnetlink_net_exit_batch
,
3169 static int __init
ctnetlink_init(void)
3173 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version
);
3174 ret
= nfnetlink_subsys_register(&ctnl_subsys
);
3176 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
3180 ret
= nfnetlink_subsys_register(&ctnl_exp_subsys
);
3182 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
3183 goto err_unreg_subsys
;
3186 ret
= register_pernet_subsys(&ctnetlink_net_ops
);
3188 pr_err("ctnetlink_init: cannot register pernet operations\n");
3189 goto err_unreg_exp_subsys
;
3191 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
3192 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3193 RCU_INIT_POINTER(nfq_ct_hook
, &ctnetlink_nfqueue_hook
);
3197 err_unreg_exp_subsys
:
3198 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3200 nfnetlink_subsys_unregister(&ctnl_subsys
);
3205 static void __exit
ctnetlink_exit(void)
3207 pr_info("ctnetlink: unregistering from nfnetlink.\n");
3209 unregister_pernet_subsys(&ctnetlink_net_ops
);
3210 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3211 nfnetlink_subsys_unregister(&ctnl_subsys
);
3212 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
3213 RCU_INIT_POINTER(nfq_ct_hook
, NULL
);
3217 module_init(ctnetlink_init
);
3218 module_exit(ctnetlink_exit
);