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_zone_id(struct sk_buff
*skb
, int attrtype
,
132 const struct nf_conntrack_zone
*zone
, int dir
)
134 if (zone
->id
== NF_CT_DEFAULT_ZONE_ID
|| zone
->dir
!= dir
)
136 if (nla_put_be16(skb
, attrtype
, htons(zone
->id
)))
137 goto nla_put_failure
;
145 ctnetlink_dump_status(struct sk_buff
*skb
, const struct nf_conn
*ct
)
147 if (nla_put_be32(skb
, CTA_STATUS
, htonl(ct
->status
)))
148 goto nla_put_failure
;
156 ctnetlink_dump_timeout(struct sk_buff
*skb
, const struct nf_conn
*ct
)
158 long timeout
= ((long)ct
->timeout
.expires
- (long)jiffies
) / HZ
;
163 if (nla_put_be32(skb
, CTA_TIMEOUT
, htonl(timeout
)))
164 goto nla_put_failure
;
172 ctnetlink_dump_protoinfo(struct sk_buff
*skb
, struct nf_conn
*ct
)
174 struct nf_conntrack_l4proto
*l4proto
;
175 struct nlattr
*nest_proto
;
178 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
179 if (!l4proto
->to_nlattr
)
182 nest_proto
= nla_nest_start(skb
, CTA_PROTOINFO
| NLA_F_NESTED
);
184 goto nla_put_failure
;
186 ret
= l4proto
->to_nlattr(skb
, nest_proto
, ct
);
188 nla_nest_end(skb
, nest_proto
);
197 ctnetlink_dump_helpinfo(struct sk_buff
*skb
, const struct nf_conn
*ct
)
199 struct nlattr
*nest_helper
;
200 const struct nf_conn_help
*help
= nfct_help(ct
);
201 struct nf_conntrack_helper
*helper
;
206 helper
= rcu_dereference(help
->helper
);
210 nest_helper
= nla_nest_start(skb
, CTA_HELP
| NLA_F_NESTED
);
212 goto nla_put_failure
;
213 if (nla_put_string(skb
, CTA_HELP_NAME
, helper
->name
))
214 goto nla_put_failure
;
216 if (helper
->to_nlattr
)
217 helper
->to_nlattr(skb
, ct
);
219 nla_nest_end(skb
, nest_helper
);
228 dump_counters(struct sk_buff
*skb
, struct nf_conn_acct
*acct
,
229 enum ip_conntrack_dir dir
, int type
)
231 enum ctattr_type attr
= dir
? CTA_COUNTERS_REPLY
: CTA_COUNTERS_ORIG
;
232 struct nf_conn_counter
*counter
= acct
->counter
;
233 struct nlattr
*nest_count
;
236 if (type
== IPCTNL_MSG_CT_GET_CTRZERO
) {
237 pkts
= atomic64_xchg(&counter
[dir
].packets
, 0);
238 bytes
= atomic64_xchg(&counter
[dir
].bytes
, 0);
240 pkts
= atomic64_read(&counter
[dir
].packets
);
241 bytes
= atomic64_read(&counter
[dir
].bytes
);
244 nest_count
= nla_nest_start(skb
, attr
| NLA_F_NESTED
);
246 goto nla_put_failure
;
248 if (nla_put_be64(skb
, CTA_COUNTERS_PACKETS
, cpu_to_be64(pkts
)) ||
249 nla_put_be64(skb
, CTA_COUNTERS_BYTES
, cpu_to_be64(bytes
)))
250 goto nla_put_failure
;
252 nla_nest_end(skb
, nest_count
);
261 ctnetlink_dump_acct(struct sk_buff
*skb
, const struct nf_conn
*ct
, int type
)
263 struct nf_conn_acct
*acct
= nf_conn_acct_find(ct
);
268 if (dump_counters(skb
, acct
, IP_CT_DIR_ORIGINAL
, type
) < 0)
270 if (dump_counters(skb
, acct
, IP_CT_DIR_REPLY
, type
) < 0)
277 ctnetlink_dump_timestamp(struct sk_buff
*skb
, const struct nf_conn
*ct
)
279 struct nlattr
*nest_count
;
280 const struct nf_conn_tstamp
*tstamp
;
282 tstamp
= nf_conn_tstamp_find(ct
);
286 nest_count
= nla_nest_start(skb
, CTA_TIMESTAMP
| NLA_F_NESTED
);
288 goto nla_put_failure
;
290 if (nla_put_be64(skb
, CTA_TIMESTAMP_START
, cpu_to_be64(tstamp
->start
)) ||
291 (tstamp
->stop
!= 0 && nla_put_be64(skb
, CTA_TIMESTAMP_STOP
,
292 cpu_to_be64(tstamp
->stop
))))
293 goto nla_put_failure
;
294 nla_nest_end(skb
, nest_count
);
302 #ifdef CONFIG_NF_CONNTRACK_MARK
304 ctnetlink_dump_mark(struct sk_buff
*skb
, const struct nf_conn
*ct
)
306 if (nla_put_be32(skb
, CTA_MARK
, htonl(ct
->mark
)))
307 goto nla_put_failure
;
314 #define ctnetlink_dump_mark(a, b) (0)
317 #ifdef CONFIG_NF_CONNTRACK_SECMARK
319 ctnetlink_dump_secctx(struct sk_buff
*skb
, const struct nf_conn
*ct
)
321 struct nlattr
*nest_secctx
;
325 ret
= security_secid_to_secctx(ct
->secmark
, &secctx
, &len
);
330 nest_secctx
= nla_nest_start(skb
, CTA_SECCTX
| NLA_F_NESTED
);
332 goto nla_put_failure
;
334 if (nla_put_string(skb
, CTA_SECCTX_NAME
, secctx
))
335 goto nla_put_failure
;
336 nla_nest_end(skb
, nest_secctx
);
340 security_release_secctx(secctx
, len
);
344 #define ctnetlink_dump_secctx(a, b) (0)
347 #ifdef CONFIG_NF_CONNTRACK_LABELS
348 static int ctnetlink_label_size(const struct nf_conn
*ct
)
350 struct nf_conn_labels
*labels
= nf_ct_labels_find(ct
);
354 return nla_total_size(labels
->words
* sizeof(long));
358 ctnetlink_dump_labels(struct sk_buff
*skb
, const struct nf_conn
*ct
)
360 struct nf_conn_labels
*labels
= nf_ct_labels_find(ct
);
366 len
= labels
->words
* sizeof(long);
369 if (labels
->bits
[i
] != 0)
370 return nla_put(skb
, CTA_LABELS
, len
, labels
->bits
);
372 } while (i
< labels
->words
);
377 #define ctnetlink_dump_labels(a, b) (0)
378 #define ctnetlink_label_size(a) (0)
381 #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
384 ctnetlink_dump_master(struct sk_buff
*skb
, const struct nf_conn
*ct
)
386 struct nlattr
*nest_parms
;
388 if (!(ct
->status
& IPS_EXPECTED
))
391 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_MASTER
| NLA_F_NESTED
);
393 goto nla_put_failure
;
394 if (ctnetlink_dump_tuples(skb
, master_tuple(ct
)) < 0)
395 goto nla_put_failure
;
396 nla_nest_end(skb
, nest_parms
);
405 dump_ct_seq_adj(struct sk_buff
*skb
, const struct nf_ct_seqadj
*seq
, int type
)
407 struct nlattr
*nest_parms
;
409 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
411 goto nla_put_failure
;
413 if (nla_put_be32(skb
, CTA_SEQADJ_CORRECTION_POS
,
414 htonl(seq
->correction_pos
)) ||
415 nla_put_be32(skb
, CTA_SEQADJ_OFFSET_BEFORE
,
416 htonl(seq
->offset_before
)) ||
417 nla_put_be32(skb
, CTA_SEQADJ_OFFSET_AFTER
,
418 htonl(seq
->offset_after
)))
419 goto nla_put_failure
;
421 nla_nest_end(skb
, nest_parms
);
430 ctnetlink_dump_ct_seq_adj(struct sk_buff
*skb
, const struct nf_conn
*ct
)
432 struct nf_conn_seqadj
*seqadj
= nfct_seqadj(ct
);
433 struct nf_ct_seqadj
*seq
;
435 if (!(ct
->status
& IPS_SEQ_ADJUST
) || !seqadj
)
438 seq
= &seqadj
->seq
[IP_CT_DIR_ORIGINAL
];
439 if (dump_ct_seq_adj(skb
, seq
, CTA_SEQ_ADJ_ORIG
) == -1)
442 seq
= &seqadj
->seq
[IP_CT_DIR_REPLY
];
443 if (dump_ct_seq_adj(skb
, seq
, CTA_SEQ_ADJ_REPLY
) == -1)
450 ctnetlink_dump_id(struct sk_buff
*skb
, const struct nf_conn
*ct
)
452 if (nla_put_be32(skb
, CTA_ID
, htonl((unsigned long)ct
)))
453 goto nla_put_failure
;
461 ctnetlink_dump_use(struct sk_buff
*skb
, const struct nf_conn
*ct
)
463 if (nla_put_be32(skb
, CTA_USE
, htonl(atomic_read(&ct
->ct_general
.use
))))
464 goto nla_put_failure
;
472 ctnetlink_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
475 const struct nf_conntrack_zone
*zone
;
476 struct nlmsghdr
*nlh
;
477 struct nfgenmsg
*nfmsg
;
478 struct nlattr
*nest_parms
;
479 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
481 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_NEW
);
482 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
486 nfmsg
= nlmsg_data(nlh
);
487 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
488 nfmsg
->version
= NFNETLINK_V0
;
491 zone
= nf_ct_zone(ct
);
493 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
495 goto nla_put_failure
;
496 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
497 goto nla_put_failure
;
498 if (ctnetlink_dump_zone_id(skb
, CTA_TUPLE_ZONE
, zone
,
499 NF_CT_ZONE_DIR_ORIG
) < 0)
500 goto nla_put_failure
;
501 nla_nest_end(skb
, nest_parms
);
503 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
505 goto nla_put_failure
;
506 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
507 goto nla_put_failure
;
508 if (ctnetlink_dump_zone_id(skb
, CTA_TUPLE_ZONE
, zone
,
509 NF_CT_ZONE_DIR_REPL
) < 0)
510 goto nla_put_failure
;
511 nla_nest_end(skb
, nest_parms
);
513 if (ctnetlink_dump_zone_id(skb
, CTA_ZONE
, zone
,
514 NF_CT_DEFAULT_ZONE_DIR
) < 0)
515 goto nla_put_failure
;
517 if (ctnetlink_dump_status(skb
, ct
) < 0 ||
518 ctnetlink_dump_timeout(skb
, ct
) < 0 ||
519 ctnetlink_dump_acct(skb
, ct
, type
) < 0 ||
520 ctnetlink_dump_timestamp(skb
, ct
) < 0 ||
521 ctnetlink_dump_protoinfo(skb
, ct
) < 0 ||
522 ctnetlink_dump_helpinfo(skb
, ct
) < 0 ||
523 ctnetlink_dump_mark(skb
, ct
) < 0 ||
524 ctnetlink_dump_secctx(skb
, ct
) < 0 ||
525 ctnetlink_dump_labels(skb
, ct
) < 0 ||
526 ctnetlink_dump_id(skb
, ct
) < 0 ||
527 ctnetlink_dump_use(skb
, ct
) < 0 ||
528 ctnetlink_dump_master(skb
, ct
) < 0 ||
529 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
530 goto nla_put_failure
;
537 nlmsg_cancel(skb
, nlh
);
542 ctnetlink_proto_size(const struct nf_conn
*ct
)
544 struct nf_conntrack_l3proto
*l3proto
;
545 struct nf_conntrack_l4proto
*l4proto
;
549 l3proto
= __nf_ct_l3proto_find(nf_ct_l3num(ct
));
550 len
+= l3proto
->nla_size
;
552 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
553 len
+= l4proto
->nla_size
;
560 ctnetlink_acct_size(const struct nf_conn
*ct
)
562 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_ACCT
))
564 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
565 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
566 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
571 ctnetlink_secctx_size(const struct nf_conn
*ct
)
573 #ifdef CONFIG_NF_CONNTRACK_SECMARK
576 ret
= security_secid_to_secctx(ct
->secmark
, NULL
, &len
);
580 return nla_total_size(0) /* CTA_SECCTX */
581 + nla_total_size(sizeof(char) * len
); /* CTA_SECCTX_NAME */
588 ctnetlink_timestamp_size(const struct nf_conn
*ct
)
590 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
591 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_TSTAMP
))
593 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
600 ctnetlink_nlmsg_size(const struct nf_conn
*ct
)
602 return NLMSG_ALIGN(sizeof(struct nfgenmsg
))
603 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
604 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
605 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
606 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
607 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
608 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
609 + ctnetlink_acct_size(ct
)
610 + ctnetlink_timestamp_size(ct
)
611 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
612 + nla_total_size(0) /* CTA_PROTOINFO */
613 + nla_total_size(0) /* CTA_HELP */
614 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
615 + ctnetlink_secctx_size(ct
)
616 #ifdef CONFIG_NF_NAT_NEEDED
617 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
618 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
620 #ifdef CONFIG_NF_CONNTRACK_MARK
621 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
623 #ifdef CONFIG_NF_CONNTRACK_ZONES
624 + nla_total_size(sizeof(u_int16_t
)) /* CTA_ZONE|CTA_TUPLE_ZONE */
626 + ctnetlink_proto_size(ct
)
627 + ctnetlink_label_size(ct
)
631 #ifdef CONFIG_NF_CONNTRACK_EVENTS
633 ctnetlink_conntrack_event(unsigned int events
, struct nf_ct_event
*item
)
635 const struct nf_conntrack_zone
*zone
;
637 struct nlmsghdr
*nlh
;
638 struct nfgenmsg
*nfmsg
;
639 struct nlattr
*nest_parms
;
640 struct nf_conn
*ct
= item
->ct
;
643 unsigned int flags
= 0, group
;
646 /* ignore our fake conntrack entry */
647 if (nf_ct_is_untracked(ct
))
650 if (events
& (1 << IPCT_DESTROY
)) {
651 type
= IPCTNL_MSG_CT_DELETE
;
652 group
= NFNLGRP_CONNTRACK_DESTROY
;
653 } else if (events
& ((1 << IPCT_NEW
) | (1 << IPCT_RELATED
))) {
654 type
= IPCTNL_MSG_CT_NEW
;
655 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
656 group
= NFNLGRP_CONNTRACK_NEW
;
658 type
= IPCTNL_MSG_CT_NEW
;
659 group
= NFNLGRP_CONNTRACK_UPDATE
;
664 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
667 skb
= nlmsg_new(ctnetlink_nlmsg_size(ct
), GFP_ATOMIC
);
671 type
|= NFNL_SUBSYS_CTNETLINK
<< 8;
672 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
676 nfmsg
= nlmsg_data(nlh
);
677 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
678 nfmsg
->version
= NFNETLINK_V0
;
682 zone
= nf_ct_zone(ct
);
684 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
686 goto nla_put_failure
;
687 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
688 goto nla_put_failure
;
689 if (ctnetlink_dump_zone_id(skb
, CTA_TUPLE_ZONE
, zone
,
690 NF_CT_ZONE_DIR_ORIG
) < 0)
691 goto nla_put_failure
;
692 nla_nest_end(skb
, nest_parms
);
694 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
696 goto nla_put_failure
;
697 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
698 goto nla_put_failure
;
699 if (ctnetlink_dump_zone_id(skb
, CTA_TUPLE_ZONE
, zone
,
700 NF_CT_ZONE_DIR_REPL
) < 0)
701 goto nla_put_failure
;
702 nla_nest_end(skb
, nest_parms
);
704 if (ctnetlink_dump_zone_id(skb
, CTA_ZONE
, zone
,
705 NF_CT_DEFAULT_ZONE_DIR
) < 0)
706 goto nla_put_failure
;
708 if (ctnetlink_dump_id(skb
, ct
) < 0)
709 goto nla_put_failure
;
711 if (ctnetlink_dump_status(skb
, ct
) < 0)
712 goto nla_put_failure
;
714 if (events
& (1 << IPCT_DESTROY
)) {
715 if (ctnetlink_dump_acct(skb
, ct
, type
) < 0 ||
716 ctnetlink_dump_timestamp(skb
, ct
) < 0)
717 goto nla_put_failure
;
719 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
720 goto nla_put_failure
;
722 if (events
& (1 << IPCT_PROTOINFO
)
723 && ctnetlink_dump_protoinfo(skb
, ct
) < 0)
724 goto nla_put_failure
;
726 if ((events
& (1 << IPCT_HELPER
) || nfct_help(ct
))
727 && ctnetlink_dump_helpinfo(skb
, ct
) < 0)
728 goto nla_put_failure
;
730 #ifdef CONFIG_NF_CONNTRACK_SECMARK
731 if ((events
& (1 << IPCT_SECMARK
) || ct
->secmark
)
732 && ctnetlink_dump_secctx(skb
, ct
) < 0)
733 goto nla_put_failure
;
735 if (events
& (1 << IPCT_LABEL
) &&
736 ctnetlink_dump_labels(skb
, ct
) < 0)
737 goto nla_put_failure
;
739 if (events
& (1 << IPCT_RELATED
) &&
740 ctnetlink_dump_master(skb
, ct
) < 0)
741 goto nla_put_failure
;
743 if (events
& (1 << IPCT_SEQADJ
) &&
744 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
745 goto nla_put_failure
;
748 #ifdef CONFIG_NF_CONNTRACK_MARK
749 if ((events
& (1 << IPCT_MARK
) || ct
->mark
)
750 && ctnetlink_dump_mark(skb
, ct
) < 0)
751 goto nla_put_failure
;
756 err
= nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
,
758 if (err
== -ENOBUFS
|| err
== -EAGAIN
)
765 nlmsg_cancel(skb
, nlh
);
769 if (nfnetlink_set_err(net
, 0, group
, -ENOBUFS
) > 0)
774 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
776 static int ctnetlink_done(struct netlink_callback
*cb
)
779 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
784 struct ctnetlink_filter
{
791 static struct ctnetlink_filter
*
792 ctnetlink_alloc_filter(const struct nlattr
* const cda
[])
794 #ifdef CONFIG_NF_CONNTRACK_MARK
795 struct ctnetlink_filter
*filter
;
797 filter
= kzalloc(sizeof(*filter
), GFP_KERNEL
);
799 return ERR_PTR(-ENOMEM
);
801 filter
->mark
.val
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
802 filter
->mark
.mask
= ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
806 return ERR_PTR(-EOPNOTSUPP
);
810 static int ctnetlink_filter_match(struct nf_conn
*ct
, void *data
)
812 struct ctnetlink_filter
*filter
= data
;
817 #ifdef CONFIG_NF_CONNTRACK_MARK
818 if ((ct
->mark
& filter
->mark
.mask
) == filter
->mark
.val
)
826 ctnetlink_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
828 struct net
*net
= sock_net(skb
->sk
);
829 struct nf_conn
*ct
, *last
;
830 struct nf_conntrack_tuple_hash
*h
;
831 struct hlist_nulls_node
*n
;
832 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
833 u_int8_t l3proto
= nfmsg
->nfgen_family
;
837 last
= (struct nf_conn
*)cb
->args
[1];
840 for (; cb
->args
[0] < net
->ct
.htable_size
; cb
->args
[0]++) {
842 lockp
= &nf_conntrack_locks
[cb
->args
[0] % CONNTRACK_LOCKS
];
844 if (cb
->args
[0] >= net
->ct
.htable_size
) {
848 hlist_nulls_for_each_entry(h
, n
, &net
->ct
.hash
[cb
->args
[0]],
850 if (NF_CT_DIRECTION(h
) != IP_CT_DIR_ORIGINAL
)
852 ct
= nf_ct_tuplehash_to_ctrack(h
);
853 /* Dump entries of a given L3 protocol number.
854 * If it is not specified, ie. l3proto == 0,
855 * then dump everything. */
856 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
863 if (!ctnetlink_filter_match(ct
, cb
->data
))
868 ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
870 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
874 nf_conntrack_get(&ct
->ct_general
);
875 cb
->args
[1] = (unsigned long)ct
;
895 ctnetlink_parse_tuple_ip(struct nlattr
*attr
, struct nf_conntrack_tuple
*tuple
)
897 struct nlattr
*tb
[CTA_IP_MAX
+1];
898 struct nf_conntrack_l3proto
*l3proto
;
901 ret
= nla_parse_nested(tb
, CTA_IP_MAX
, attr
, NULL
);
906 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
908 if (likely(l3proto
->nlattr_to_tuple
)) {
909 ret
= nla_validate_nested(attr
, CTA_IP_MAX
,
910 l3proto
->nla_policy
);
912 ret
= l3proto
->nlattr_to_tuple(tb
, tuple
);
920 static const struct nla_policy proto_nla_policy
[CTA_PROTO_MAX
+1] = {
921 [CTA_PROTO_NUM
] = { .type
= NLA_U8
},
925 ctnetlink_parse_tuple_proto(struct nlattr
*attr
,
926 struct nf_conntrack_tuple
*tuple
)
928 struct nlattr
*tb
[CTA_PROTO_MAX
+1];
929 struct nf_conntrack_l4proto
*l4proto
;
932 ret
= nla_parse_nested(tb
, CTA_PROTO_MAX
, attr
, proto_nla_policy
);
936 if (!tb
[CTA_PROTO_NUM
])
938 tuple
->dst
.protonum
= nla_get_u8(tb
[CTA_PROTO_NUM
]);
941 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
, tuple
->dst
.protonum
);
943 if (likely(l4proto
->nlattr_to_tuple
)) {
944 ret
= nla_validate_nested(attr
, CTA_PROTO_MAX
,
945 l4proto
->nla_policy
);
947 ret
= l4proto
->nlattr_to_tuple(tb
, tuple
);
956 ctnetlink_parse_zone(const struct nlattr
*attr
,
957 struct nf_conntrack_zone
*zone
)
959 nf_ct_zone_init(zone
, NF_CT_DEFAULT_ZONE_ID
,
960 NF_CT_DEFAULT_ZONE_DIR
, 0);
961 #ifdef CONFIG_NF_CONNTRACK_ZONES
963 zone
->id
= ntohs(nla_get_be16(attr
));
972 ctnetlink_parse_tuple_zone(struct nlattr
*attr
, enum ctattr_type type
,
973 struct nf_conntrack_zone
*zone
)
977 if (zone
->id
!= NF_CT_DEFAULT_ZONE_ID
)
980 ret
= ctnetlink_parse_zone(attr
, zone
);
984 if (type
== CTA_TUPLE_REPLY
)
985 zone
->dir
= NF_CT_ZONE_DIR_REPL
;
987 zone
->dir
= NF_CT_ZONE_DIR_ORIG
;
992 static const struct nla_policy tuple_nla_policy
[CTA_TUPLE_MAX
+1] = {
993 [CTA_TUPLE_IP
] = { .type
= NLA_NESTED
},
994 [CTA_TUPLE_PROTO
] = { .type
= NLA_NESTED
},
995 [CTA_TUPLE_ZONE
] = { .type
= NLA_U16
},
999 ctnetlink_parse_tuple(const struct nlattr
* const cda
[],
1000 struct nf_conntrack_tuple
*tuple
,
1001 enum ctattr_type type
, u_int8_t l3num
,
1002 struct nf_conntrack_zone
*zone
)
1004 struct nlattr
*tb
[CTA_TUPLE_MAX
+1];
1007 memset(tuple
, 0, sizeof(*tuple
));
1009 err
= nla_parse_nested(tb
, CTA_TUPLE_MAX
, cda
[type
], tuple_nla_policy
);
1013 if (!tb
[CTA_TUPLE_IP
])
1016 tuple
->src
.l3num
= l3num
;
1018 err
= ctnetlink_parse_tuple_ip(tb
[CTA_TUPLE_IP
], tuple
);
1022 if (!tb
[CTA_TUPLE_PROTO
])
1025 err
= ctnetlink_parse_tuple_proto(tb
[CTA_TUPLE_PROTO
], tuple
);
1029 if (tb
[CTA_TUPLE_ZONE
]) {
1033 err
= ctnetlink_parse_tuple_zone(tb
[CTA_TUPLE_ZONE
],
1039 /* orig and expect tuples get DIR_ORIGINAL */
1040 if (type
== CTA_TUPLE_REPLY
)
1041 tuple
->dst
.dir
= IP_CT_DIR_REPLY
;
1043 tuple
->dst
.dir
= IP_CT_DIR_ORIGINAL
;
1048 static const struct nla_policy help_nla_policy
[CTA_HELP_MAX
+1] = {
1049 [CTA_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
1050 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
1054 ctnetlink_parse_help(const struct nlattr
*attr
, char **helper_name
,
1055 struct nlattr
**helpinfo
)
1058 struct nlattr
*tb
[CTA_HELP_MAX
+1];
1060 err
= nla_parse_nested(tb
, CTA_HELP_MAX
, attr
, help_nla_policy
);
1064 if (!tb
[CTA_HELP_NAME
])
1067 *helper_name
= nla_data(tb
[CTA_HELP_NAME
]);
1069 if (tb
[CTA_HELP_INFO
])
1070 *helpinfo
= tb
[CTA_HELP_INFO
];
1075 static const struct nla_policy ct_nla_policy
[CTA_MAX
+1] = {
1076 [CTA_TUPLE_ORIG
] = { .type
= NLA_NESTED
},
1077 [CTA_TUPLE_REPLY
] = { .type
= NLA_NESTED
},
1078 [CTA_STATUS
] = { .type
= NLA_U32
},
1079 [CTA_PROTOINFO
] = { .type
= NLA_NESTED
},
1080 [CTA_HELP
] = { .type
= NLA_NESTED
},
1081 [CTA_NAT_SRC
] = { .type
= NLA_NESTED
},
1082 [CTA_TIMEOUT
] = { .type
= NLA_U32
},
1083 [CTA_MARK
] = { .type
= NLA_U32
},
1084 [CTA_ID
] = { .type
= NLA_U32
},
1085 [CTA_NAT_DST
] = { .type
= NLA_NESTED
},
1086 [CTA_TUPLE_MASTER
] = { .type
= NLA_NESTED
},
1087 [CTA_NAT_SEQ_ADJ_ORIG
] = { .type
= NLA_NESTED
},
1088 [CTA_NAT_SEQ_ADJ_REPLY
] = { .type
= NLA_NESTED
},
1089 [CTA_ZONE
] = { .type
= NLA_U16
},
1090 [CTA_MARK_MASK
] = { .type
= NLA_U32
},
1091 [CTA_LABELS
] = { .type
= NLA_BINARY
,
1092 .len
= NF_CT_LABELS_MAX_SIZE
},
1093 [CTA_LABELS_MASK
] = { .type
= NLA_BINARY
,
1094 .len
= NF_CT_LABELS_MAX_SIZE
},
1097 static int ctnetlink_flush_conntrack(struct net
*net
,
1098 const struct nlattr
* const cda
[],
1099 u32 portid
, int report
)
1101 struct ctnetlink_filter
*filter
= NULL
;
1103 if (cda
[CTA_MARK
] && cda
[CTA_MARK_MASK
]) {
1104 filter
= ctnetlink_alloc_filter(cda
);
1106 return PTR_ERR(filter
);
1109 nf_ct_iterate_cleanup(net
, ctnetlink_filter_match
, filter
,
1116 static int ctnetlink_del_conntrack(struct net
*net
, struct sock
*ctnl
,
1117 struct sk_buff
*skb
,
1118 const struct nlmsghdr
*nlh
,
1119 const struct nlattr
* const cda
[])
1121 struct nf_conntrack_tuple_hash
*h
;
1122 struct nf_conntrack_tuple tuple
;
1124 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1125 u_int8_t u3
= nfmsg
->nfgen_family
;
1126 struct nf_conntrack_zone zone
;
1129 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1133 if (cda
[CTA_TUPLE_ORIG
])
1134 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
,
1136 else if (cda
[CTA_TUPLE_REPLY
])
1137 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
,
1140 return ctnetlink_flush_conntrack(net
, cda
,
1141 NETLINK_CB(skb
).portid
,
1148 h
= nf_conntrack_find_get(net
, &zone
, &tuple
);
1152 ct
= nf_ct_tuplehash_to_ctrack(h
);
1155 u_int32_t id
= ntohl(nla_get_be32(cda
[CTA_ID
]));
1156 if (id
!= (u32
)(unsigned long)ct
) {
1162 if (del_timer(&ct
->timeout
))
1163 nf_ct_delete(ct
, NETLINK_CB(skb
).portid
, nlmsg_report(nlh
));
1170 static int ctnetlink_get_conntrack(struct net
*net
, struct sock
*ctnl
,
1171 struct sk_buff
*skb
,
1172 const struct nlmsghdr
*nlh
,
1173 const struct nlattr
* const cda
[])
1175 struct nf_conntrack_tuple_hash
*h
;
1176 struct nf_conntrack_tuple tuple
;
1178 struct sk_buff
*skb2
= NULL
;
1179 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1180 u_int8_t u3
= nfmsg
->nfgen_family
;
1181 struct nf_conntrack_zone zone
;
1184 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1185 struct netlink_dump_control c
= {
1186 .dump
= ctnetlink_dump_table
,
1187 .done
= ctnetlink_done
,
1190 if (cda
[CTA_MARK
] && cda
[CTA_MARK_MASK
]) {
1191 struct ctnetlink_filter
*filter
;
1193 filter
= ctnetlink_alloc_filter(cda
);
1195 return PTR_ERR(filter
);
1199 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1202 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1206 if (cda
[CTA_TUPLE_ORIG
])
1207 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
,
1209 else if (cda
[CTA_TUPLE_REPLY
])
1210 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
,
1218 h
= nf_conntrack_find_get(net
, &zone
, &tuple
);
1222 ct
= nf_ct_tuplehash_to_ctrack(h
);
1225 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1232 err
= ctnetlink_fill_info(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
,
1233 NFNL_MSG_TYPE(nlh
->nlmsg_type
), ct
);
1239 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1248 /* this avoids a loop in nfnetlink. */
1249 return err
== -EAGAIN
? -ENOBUFS
: err
;
1252 static int ctnetlink_done_list(struct netlink_callback
*cb
)
1255 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
1260 ctnetlink_dump_list(struct sk_buff
*skb
, struct netlink_callback
*cb
, bool dying
)
1262 struct nf_conn
*ct
, *last
;
1263 struct nf_conntrack_tuple_hash
*h
;
1264 struct hlist_nulls_node
*n
;
1265 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
1266 u_int8_t l3proto
= nfmsg
->nfgen_family
;
1269 struct hlist_nulls_head
*list
;
1270 struct net
*net
= sock_net(skb
->sk
);
1275 last
= (struct nf_conn
*)cb
->args
[1];
1277 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
1278 struct ct_pcpu
*pcpu
;
1280 if (!cpu_possible(cpu
))
1283 pcpu
= per_cpu_ptr(net
->ct
.pcpu_lists
, cpu
);
1284 spin_lock_bh(&pcpu
->lock
);
1285 list
= dying
? &pcpu
->dying
: &pcpu
->unconfirmed
;
1287 hlist_nulls_for_each_entry(h
, n
, list
, hnnode
) {
1288 ct
= nf_ct_tuplehash_to_ctrack(h
);
1289 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
1297 res
= ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
1299 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
1303 if (!atomic_inc_not_zero(&ct
->ct_general
.use
))
1306 cb
->args
[1] = (unsigned long)ct
;
1307 spin_unlock_bh(&pcpu
->lock
);
1315 spin_unlock_bh(&pcpu
->lock
);
1326 ctnetlink_dump_dying(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1328 return ctnetlink_dump_list(skb
, cb
, true);
1331 static int ctnetlink_get_ct_dying(struct net
*net
, struct sock
*ctnl
,
1332 struct sk_buff
*skb
,
1333 const struct nlmsghdr
*nlh
,
1334 const struct nlattr
* const cda
[])
1336 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1337 struct netlink_dump_control c
= {
1338 .dump
= ctnetlink_dump_dying
,
1339 .done
= ctnetlink_done_list
,
1341 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1348 ctnetlink_dump_unconfirmed(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1350 return ctnetlink_dump_list(skb
, cb
, false);
1353 static int ctnetlink_get_ct_unconfirmed(struct net
*net
, struct sock
*ctnl
,
1354 struct sk_buff
*skb
,
1355 const struct nlmsghdr
*nlh
,
1356 const struct nlattr
* const cda
[])
1358 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1359 struct netlink_dump_control c
= {
1360 .dump
= ctnetlink_dump_unconfirmed
,
1361 .done
= ctnetlink_done_list
,
1363 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1369 #ifdef CONFIG_NF_NAT_NEEDED
1371 ctnetlink_parse_nat_setup(struct nf_conn
*ct
,
1372 enum nf_nat_manip_type manip
,
1373 const struct nlattr
*attr
)
1375 typeof(nfnetlink_parse_nat_setup_hook
) parse_nat_setup
;
1378 parse_nat_setup
= rcu_dereference(nfnetlink_parse_nat_setup_hook
);
1379 if (!parse_nat_setup
) {
1380 #ifdef CONFIG_MODULES
1382 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1383 if (request_module("nf-nat") < 0) {
1384 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1388 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1390 if (nfnetlink_parse_nat_setup_hook
)
1396 err
= parse_nat_setup(ct
, manip
, attr
);
1397 if (err
== -EAGAIN
) {
1398 #ifdef CONFIG_MODULES
1400 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1401 if (request_module("nf-nat-%u", nf_ct_l3num(ct
)) < 0) {
1402 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1406 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1417 ctnetlink_change_status(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1420 unsigned int status
= ntohl(nla_get_be32(cda
[CTA_STATUS
]));
1421 d
= ct
->status
^ status
;
1423 if (d
& (IPS_EXPECTED
|IPS_CONFIRMED
|IPS_DYING
))
1427 if (d
& IPS_SEEN_REPLY
&& !(status
& IPS_SEEN_REPLY
))
1428 /* SEEN_REPLY bit can only be set */
1431 if (d
& IPS_ASSURED
&& !(status
& IPS_ASSURED
))
1432 /* ASSURED bit can only be set */
1435 /* Be careful here, modifying NAT bits can screw up things,
1436 * so don't let users modify them directly if they don't pass
1438 ct
->status
|= status
& ~(IPS_NAT_DONE_MASK
| IPS_NAT_MASK
);
1443 ctnetlink_setup_nat(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1445 #ifdef CONFIG_NF_NAT_NEEDED
1448 if (!cda
[CTA_NAT_DST
] && !cda
[CTA_NAT_SRC
])
1451 ret
= ctnetlink_parse_nat_setup(ct
, NF_NAT_MANIP_DST
,
1456 ret
= ctnetlink_parse_nat_setup(ct
, NF_NAT_MANIP_SRC
,
1460 if (!cda
[CTA_NAT_DST
] && !cda
[CTA_NAT_SRC
])
1467 ctnetlink_change_helper(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1469 struct nf_conntrack_helper
*helper
;
1470 struct nf_conn_help
*help
= nfct_help(ct
);
1471 char *helpname
= NULL
;
1472 struct nlattr
*helpinfo
= NULL
;
1475 /* don't change helper of sibling connections */
1479 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1483 if (!strcmp(helpname
, "")) {
1484 if (help
&& help
->helper
) {
1485 /* we had a helper before ... */
1486 nf_ct_remove_expectations(ct
);
1487 RCU_INIT_POINTER(help
->helper
, NULL
);
1493 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1494 nf_ct_protonum(ct
));
1495 if (helper
== NULL
) {
1496 #ifdef CONFIG_MODULES
1497 spin_unlock_bh(&nf_conntrack_expect_lock
);
1499 if (request_module("nfct-helper-%s", helpname
) < 0) {
1500 spin_lock_bh(&nf_conntrack_expect_lock
);
1504 spin_lock_bh(&nf_conntrack_expect_lock
);
1505 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1506 nf_ct_protonum(ct
));
1514 if (help
->helper
== helper
) {
1515 /* update private helper data if allowed. */
1516 if (helper
->from_nlattr
)
1517 helper
->from_nlattr(helpinfo
, ct
);
1523 /* we cannot set a helper for an existing conntrack */
1528 ctnetlink_change_timeout(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1530 u_int32_t timeout
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1532 if (!del_timer(&ct
->timeout
))
1535 ct
->timeout
.expires
= jiffies
+ timeout
* HZ
;
1536 add_timer(&ct
->timeout
);
1541 static const struct nla_policy protoinfo_policy
[CTA_PROTOINFO_MAX
+1] = {
1542 [CTA_PROTOINFO_TCP
] = { .type
= NLA_NESTED
},
1543 [CTA_PROTOINFO_DCCP
] = { .type
= NLA_NESTED
},
1544 [CTA_PROTOINFO_SCTP
] = { .type
= NLA_NESTED
},
1548 ctnetlink_change_protoinfo(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1550 const struct nlattr
*attr
= cda
[CTA_PROTOINFO
];
1551 struct nlattr
*tb
[CTA_PROTOINFO_MAX
+1];
1552 struct nf_conntrack_l4proto
*l4proto
;
1555 err
= nla_parse_nested(tb
, CTA_PROTOINFO_MAX
, attr
, protoinfo_policy
);
1560 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
1561 if (l4proto
->from_nlattr
)
1562 err
= l4proto
->from_nlattr(tb
, ct
);
1568 static const struct nla_policy seqadj_policy
[CTA_SEQADJ_MAX
+1] = {
1569 [CTA_SEQADJ_CORRECTION_POS
] = { .type
= NLA_U32
},
1570 [CTA_SEQADJ_OFFSET_BEFORE
] = { .type
= NLA_U32
},
1571 [CTA_SEQADJ_OFFSET_AFTER
] = { .type
= NLA_U32
},
1575 change_seq_adj(struct nf_ct_seqadj
*seq
, const struct nlattr
* const attr
)
1578 struct nlattr
*cda
[CTA_SEQADJ_MAX
+1];
1580 err
= nla_parse_nested(cda
, CTA_SEQADJ_MAX
, attr
, seqadj_policy
);
1584 if (!cda
[CTA_SEQADJ_CORRECTION_POS
])
1587 seq
->correction_pos
=
1588 ntohl(nla_get_be32(cda
[CTA_SEQADJ_CORRECTION_POS
]));
1590 if (!cda
[CTA_SEQADJ_OFFSET_BEFORE
])
1593 seq
->offset_before
=
1594 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_BEFORE
]));
1596 if (!cda
[CTA_SEQADJ_OFFSET_AFTER
])
1600 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_AFTER
]));
1606 ctnetlink_change_seq_adj(struct nf_conn
*ct
,
1607 const struct nlattr
* const cda
[])
1609 struct nf_conn_seqadj
*seqadj
= nfct_seqadj(ct
);
1615 if (cda
[CTA_SEQ_ADJ_ORIG
]) {
1616 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_ORIGINAL
],
1617 cda
[CTA_SEQ_ADJ_ORIG
]);
1621 ct
->status
|= IPS_SEQ_ADJUST
;
1624 if (cda
[CTA_SEQ_ADJ_REPLY
]) {
1625 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_REPLY
],
1626 cda
[CTA_SEQ_ADJ_REPLY
]);
1630 ct
->status
|= IPS_SEQ_ADJUST
;
1637 ctnetlink_attach_labels(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1639 #ifdef CONFIG_NF_CONNTRACK_LABELS
1640 size_t len
= nla_len(cda
[CTA_LABELS
]);
1641 const void *mask
= cda
[CTA_LABELS_MASK
];
1643 if (len
& (sizeof(u32
)-1)) /* must be multiple of u32 */
1647 if (nla_len(cda
[CTA_LABELS_MASK
]) == 0 ||
1648 nla_len(cda
[CTA_LABELS_MASK
]) != len
)
1650 mask
= nla_data(cda
[CTA_LABELS_MASK
]);
1655 return nf_connlabels_replace(ct
, nla_data(cda
[CTA_LABELS
]), mask
, len
);
1662 ctnetlink_change_conntrack(struct nf_conn
*ct
,
1663 const struct nlattr
* const cda
[])
1667 /* only allow NAT changes and master assignation for new conntracks */
1668 if (cda
[CTA_NAT_SRC
] || cda
[CTA_NAT_DST
] || cda
[CTA_TUPLE_MASTER
])
1671 if (cda
[CTA_HELP
]) {
1672 err
= ctnetlink_change_helper(ct
, cda
);
1677 if (cda
[CTA_TIMEOUT
]) {
1678 err
= ctnetlink_change_timeout(ct
, cda
);
1683 if (cda
[CTA_STATUS
]) {
1684 err
= ctnetlink_change_status(ct
, cda
);
1689 if (cda
[CTA_PROTOINFO
]) {
1690 err
= ctnetlink_change_protoinfo(ct
, cda
);
1695 #if defined(CONFIG_NF_CONNTRACK_MARK)
1697 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1700 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1701 err
= ctnetlink_change_seq_adj(ct
, cda
);
1706 if (cda
[CTA_LABELS
]) {
1707 err
= ctnetlink_attach_labels(ct
, cda
);
1715 static struct nf_conn
*
1716 ctnetlink_create_conntrack(struct net
*net
,
1717 const struct nf_conntrack_zone
*zone
,
1718 const struct nlattr
* const cda
[],
1719 struct nf_conntrack_tuple
*otuple
,
1720 struct nf_conntrack_tuple
*rtuple
,
1725 struct nf_conntrack_helper
*helper
;
1726 struct nf_conn_tstamp
*tstamp
;
1728 ct
= nf_conntrack_alloc(net
, zone
, otuple
, rtuple
, GFP_ATOMIC
);
1730 return ERR_PTR(-ENOMEM
);
1732 if (!cda
[CTA_TIMEOUT
])
1734 ct
->timeout
.expires
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1736 ct
->timeout
.expires
= jiffies
+ ct
->timeout
.expires
* HZ
;
1739 if (cda
[CTA_HELP
]) {
1740 char *helpname
= NULL
;
1741 struct nlattr
*helpinfo
= NULL
;
1743 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1747 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1748 nf_ct_protonum(ct
));
1749 if (helper
== NULL
) {
1751 #ifdef CONFIG_MODULES
1752 if (request_module("nfct-helper-%s", helpname
) < 0) {
1758 helper
= __nf_conntrack_helper_find(helpname
,
1760 nf_ct_protonum(ct
));
1770 struct nf_conn_help
*help
;
1772 help
= nf_ct_helper_ext_add(ct
, helper
, GFP_ATOMIC
);
1777 /* set private helper data if allowed. */
1778 if (helper
->from_nlattr
)
1779 helper
->from_nlattr(helpinfo
, ct
);
1781 /* not in hash table yet so not strictly necessary */
1782 RCU_INIT_POINTER(help
->helper
, helper
);
1785 /* try an implicit helper assignation */
1786 err
= __nf_ct_try_assign_helper(ct
, NULL
, GFP_ATOMIC
);
1791 err
= ctnetlink_setup_nat(ct
, cda
);
1795 nf_ct_acct_ext_add(ct
, GFP_ATOMIC
);
1796 nf_ct_tstamp_ext_add(ct
, GFP_ATOMIC
);
1797 nf_ct_ecache_ext_add(ct
, 0, 0, GFP_ATOMIC
);
1798 nf_ct_labels_ext_add(ct
);
1800 /* we must add conntrack extensions before confirmation. */
1801 ct
->status
|= IPS_CONFIRMED
;
1803 if (cda
[CTA_STATUS
]) {
1804 err
= ctnetlink_change_status(ct
, cda
);
1809 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1810 err
= ctnetlink_change_seq_adj(ct
, cda
);
1815 memset(&ct
->proto
, 0, sizeof(ct
->proto
));
1816 if (cda
[CTA_PROTOINFO
]) {
1817 err
= ctnetlink_change_protoinfo(ct
, cda
);
1822 #if defined(CONFIG_NF_CONNTRACK_MARK)
1824 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1827 /* setup master conntrack: this is a confirmed expectation */
1828 if (cda
[CTA_TUPLE_MASTER
]) {
1829 struct nf_conntrack_tuple master
;
1830 struct nf_conntrack_tuple_hash
*master_h
;
1831 struct nf_conn
*master_ct
;
1833 err
= ctnetlink_parse_tuple(cda
, &master
, CTA_TUPLE_MASTER
,
1838 master_h
= nf_conntrack_find_get(net
, zone
, &master
);
1839 if (master_h
== NULL
) {
1843 master_ct
= nf_ct_tuplehash_to_ctrack(master_h
);
1844 __set_bit(IPS_EXPECTED_BIT
, &ct
->status
);
1845 ct
->master
= master_ct
;
1847 tstamp
= nf_conn_tstamp_find(ct
);
1849 tstamp
->start
= ktime_get_real_ns();
1851 err
= nf_conntrack_hash_check_insert(ct
);
1862 nf_conntrack_free(ct
);
1863 return ERR_PTR(err
);
1866 static int ctnetlink_new_conntrack(struct net
*net
, struct sock
*ctnl
,
1867 struct sk_buff
*skb
,
1868 const struct nlmsghdr
*nlh
,
1869 const struct nlattr
* const cda
[])
1871 struct nf_conntrack_tuple otuple
, rtuple
;
1872 struct nf_conntrack_tuple_hash
*h
= NULL
;
1873 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1875 u_int8_t u3
= nfmsg
->nfgen_family
;
1876 struct nf_conntrack_zone zone
;
1879 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1883 if (cda
[CTA_TUPLE_ORIG
]) {
1884 err
= ctnetlink_parse_tuple(cda
, &otuple
, CTA_TUPLE_ORIG
,
1890 if (cda
[CTA_TUPLE_REPLY
]) {
1891 err
= ctnetlink_parse_tuple(cda
, &rtuple
, CTA_TUPLE_REPLY
,
1897 if (cda
[CTA_TUPLE_ORIG
])
1898 h
= nf_conntrack_find_get(net
, &zone
, &otuple
);
1899 else if (cda
[CTA_TUPLE_REPLY
])
1900 h
= nf_conntrack_find_get(net
, &zone
, &rtuple
);
1904 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
1905 enum ip_conntrack_events events
;
1907 if (!cda
[CTA_TUPLE_ORIG
] || !cda
[CTA_TUPLE_REPLY
])
1910 ct
= ctnetlink_create_conntrack(net
, &zone
, cda
, &otuple
,
1916 if (test_bit(IPS_EXPECTED_BIT
, &ct
->status
))
1917 events
= IPCT_RELATED
;
1921 if (cda
[CTA_LABELS
] &&
1922 ctnetlink_attach_labels(ct
, cda
) == 0)
1923 events
|= (1 << IPCT_LABEL
);
1925 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1926 (1 << IPCT_ASSURED
) |
1927 (1 << IPCT_HELPER
) |
1928 (1 << IPCT_PROTOINFO
) |
1929 (1 << IPCT_SEQADJ
) |
1930 (1 << IPCT_MARK
) | events
,
1931 ct
, NETLINK_CB(skb
).portid
,
1938 /* implicit 'else' */
1941 ct
= nf_ct_tuplehash_to_ctrack(h
);
1942 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
)) {
1943 spin_lock_bh(&nf_conntrack_expect_lock
);
1944 err
= ctnetlink_change_conntrack(ct
, cda
);
1945 spin_unlock_bh(&nf_conntrack_expect_lock
);
1947 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1948 (1 << IPCT_ASSURED
) |
1949 (1 << IPCT_HELPER
) |
1951 (1 << IPCT_PROTOINFO
) |
1952 (1 << IPCT_SEQADJ
) |
1954 ct
, NETLINK_CB(skb
).portid
,
1964 ctnetlink_ct_stat_cpu_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
1965 __u16 cpu
, const struct ip_conntrack_stat
*st
)
1967 struct nlmsghdr
*nlh
;
1968 struct nfgenmsg
*nfmsg
;
1969 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1971 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS_CPU
);
1972 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1976 nfmsg
= nlmsg_data(nlh
);
1977 nfmsg
->nfgen_family
= AF_UNSPEC
;
1978 nfmsg
->version
= NFNETLINK_V0
;
1979 nfmsg
->res_id
= htons(cpu
);
1981 if (nla_put_be32(skb
, CTA_STATS_SEARCHED
, htonl(st
->searched
)) ||
1982 nla_put_be32(skb
, CTA_STATS_FOUND
, htonl(st
->found
)) ||
1983 nla_put_be32(skb
, CTA_STATS_NEW
, htonl(st
->new)) ||
1984 nla_put_be32(skb
, CTA_STATS_INVALID
, htonl(st
->invalid
)) ||
1985 nla_put_be32(skb
, CTA_STATS_IGNORE
, htonl(st
->ignore
)) ||
1986 nla_put_be32(skb
, CTA_STATS_DELETE
, htonl(st
->delete)) ||
1987 nla_put_be32(skb
, CTA_STATS_DELETE_LIST
, htonl(st
->delete_list
)) ||
1988 nla_put_be32(skb
, CTA_STATS_INSERT
, htonl(st
->insert
)) ||
1989 nla_put_be32(skb
, CTA_STATS_INSERT_FAILED
,
1990 htonl(st
->insert_failed
)) ||
1991 nla_put_be32(skb
, CTA_STATS_DROP
, htonl(st
->drop
)) ||
1992 nla_put_be32(skb
, CTA_STATS_EARLY_DROP
, htonl(st
->early_drop
)) ||
1993 nla_put_be32(skb
, CTA_STATS_ERROR
, htonl(st
->error
)) ||
1994 nla_put_be32(skb
, CTA_STATS_SEARCH_RESTART
,
1995 htonl(st
->search_restart
)))
1996 goto nla_put_failure
;
1998 nlmsg_end(skb
, nlh
);
2003 nlmsg_cancel(skb
, nlh
);
2008 ctnetlink_ct_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2011 struct net
*net
= sock_net(skb
->sk
);
2013 if (cb
->args
[0] == nr_cpu_ids
)
2016 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
2017 const struct ip_conntrack_stat
*st
;
2019 if (!cpu_possible(cpu
))
2022 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
2023 if (ctnetlink_ct_stat_cpu_fill_info(skb
,
2024 NETLINK_CB(cb
->skb
).portid
,
2034 static int ctnetlink_stat_ct_cpu(struct net
*net
, struct sock
*ctnl
,
2035 struct sk_buff
*skb
,
2036 const struct nlmsghdr
*nlh
,
2037 const struct nlattr
* const cda
[])
2039 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
2040 struct netlink_dump_control c
= {
2041 .dump
= ctnetlink_ct_stat_cpu_dump
,
2043 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2050 ctnetlink_stat_ct_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
2053 struct nlmsghdr
*nlh
;
2054 struct nfgenmsg
*nfmsg
;
2055 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
2056 unsigned int nr_conntracks
= atomic_read(&net
->ct
.count
);
2058 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS
);
2059 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
2063 nfmsg
= nlmsg_data(nlh
);
2064 nfmsg
->nfgen_family
= AF_UNSPEC
;
2065 nfmsg
->version
= NFNETLINK_V0
;
2068 if (nla_put_be32(skb
, CTA_STATS_GLOBAL_ENTRIES
, htonl(nr_conntracks
)))
2069 goto nla_put_failure
;
2071 nlmsg_end(skb
, nlh
);
2076 nlmsg_cancel(skb
, nlh
);
2080 static int ctnetlink_stat_ct(struct net
*net
, struct sock
*ctnl
,
2081 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
2082 const struct nlattr
* const cda
[])
2084 struct sk_buff
*skb2
;
2087 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
2091 err
= ctnetlink_stat_ct_fill_info(skb2
, NETLINK_CB(skb
).portid
,
2093 NFNL_MSG_TYPE(nlh
->nlmsg_type
),
2098 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
2107 /* this avoids a loop in nfnetlink. */
2108 return err
== -EAGAIN
? -ENOBUFS
: err
;
2111 static const struct nla_policy exp_nla_policy
[CTA_EXPECT_MAX
+1] = {
2112 [CTA_EXPECT_MASTER
] = { .type
= NLA_NESTED
},
2113 [CTA_EXPECT_TUPLE
] = { .type
= NLA_NESTED
},
2114 [CTA_EXPECT_MASK
] = { .type
= NLA_NESTED
},
2115 [CTA_EXPECT_TIMEOUT
] = { .type
= NLA_U32
},
2116 [CTA_EXPECT_ID
] = { .type
= NLA_U32
},
2117 [CTA_EXPECT_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
2118 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
2119 [CTA_EXPECT_ZONE
] = { .type
= NLA_U16
},
2120 [CTA_EXPECT_FLAGS
] = { .type
= NLA_U32
},
2121 [CTA_EXPECT_CLASS
] = { .type
= NLA_U32
},
2122 [CTA_EXPECT_NAT
] = { .type
= NLA_NESTED
},
2123 [CTA_EXPECT_FN
] = { .type
= NLA_NUL_STRING
},
2126 static struct nf_conntrack_expect
*
2127 ctnetlink_alloc_expect(const struct nlattr
*const cda
[], struct nf_conn
*ct
,
2128 struct nf_conntrack_helper
*helper
,
2129 struct nf_conntrack_tuple
*tuple
,
2130 struct nf_conntrack_tuple
*mask
);
2132 #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
2134 ctnetlink_glue_build_size(const struct nf_conn
*ct
)
2136 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2137 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2138 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2139 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
2140 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
2141 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
2142 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
2143 + nla_total_size(0) /* CTA_PROTOINFO */
2144 + nla_total_size(0) /* CTA_HELP */
2145 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
2146 + ctnetlink_secctx_size(ct
)
2147 #ifdef CONFIG_NF_NAT_NEEDED
2148 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2149 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
2151 #ifdef CONFIG_NF_CONNTRACK_MARK
2152 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
2154 #ifdef CONFIG_NF_CONNTRACK_ZONES
2155 + nla_total_size(sizeof(u_int16_t
)) /* CTA_ZONE|CTA_TUPLE_ZONE */
2157 + ctnetlink_proto_size(ct
)
2161 static struct nf_conn
*ctnetlink_glue_get_ct(const struct sk_buff
*skb
,
2162 enum ip_conntrack_info
*ctinfo
)
2166 ct
= nf_ct_get(skb
, ctinfo
);
2167 if (ct
&& nf_ct_is_untracked(ct
))
2173 static int __ctnetlink_glue_build(struct sk_buff
*skb
, struct nf_conn
*ct
)
2175 const struct nf_conntrack_zone
*zone
;
2176 struct nlattr
*nest_parms
;
2179 zone
= nf_ct_zone(ct
);
2181 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
2183 goto nla_put_failure
;
2184 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
2185 goto nla_put_failure
;
2186 if (ctnetlink_dump_zone_id(skb
, CTA_TUPLE_ZONE
, zone
,
2187 NF_CT_ZONE_DIR_ORIG
) < 0)
2188 goto nla_put_failure
;
2189 nla_nest_end(skb
, nest_parms
);
2191 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
2193 goto nla_put_failure
;
2194 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
2195 goto nla_put_failure
;
2196 if (ctnetlink_dump_zone_id(skb
, CTA_TUPLE_ZONE
, zone
,
2197 NF_CT_ZONE_DIR_REPL
) < 0)
2198 goto nla_put_failure
;
2199 nla_nest_end(skb
, nest_parms
);
2201 if (ctnetlink_dump_zone_id(skb
, CTA_ZONE
, zone
,
2202 NF_CT_DEFAULT_ZONE_DIR
) < 0)
2203 goto nla_put_failure
;
2205 if (ctnetlink_dump_id(skb
, ct
) < 0)
2206 goto nla_put_failure
;
2208 if (ctnetlink_dump_status(skb
, ct
) < 0)
2209 goto nla_put_failure
;
2211 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
2212 goto nla_put_failure
;
2214 if (ctnetlink_dump_protoinfo(skb
, ct
) < 0)
2215 goto nla_put_failure
;
2217 if (ctnetlink_dump_helpinfo(skb
, ct
) < 0)
2218 goto nla_put_failure
;
2220 #ifdef CONFIG_NF_CONNTRACK_SECMARK
2221 if (ct
->secmark
&& ctnetlink_dump_secctx(skb
, ct
) < 0)
2222 goto nla_put_failure
;
2224 if (ct
->master
&& ctnetlink_dump_master(skb
, ct
) < 0)
2225 goto nla_put_failure
;
2227 if ((ct
->status
& IPS_SEQ_ADJUST
) &&
2228 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
2229 goto nla_put_failure
;
2231 #ifdef CONFIG_NF_CONNTRACK_MARK
2232 if (ct
->mark
&& ctnetlink_dump_mark(skb
, ct
) < 0)
2233 goto nla_put_failure
;
2235 if (ctnetlink_dump_labels(skb
, ct
) < 0)
2236 goto nla_put_failure
;
2246 ctnetlink_glue_build(struct sk_buff
*skb
, struct nf_conn
*ct
,
2247 enum ip_conntrack_info ctinfo
,
2248 u_int16_t ct_attr
, u_int16_t ct_info_attr
)
2250 struct nlattr
*nest_parms
;
2252 nest_parms
= nla_nest_start(skb
, ct_attr
| NLA_F_NESTED
);
2254 goto nla_put_failure
;
2256 if (__ctnetlink_glue_build(skb
, ct
) < 0)
2257 goto nla_put_failure
;
2259 nla_nest_end(skb
, nest_parms
);
2261 if (nla_put_be32(skb
, ct_info_attr
, htonl(ctinfo
)))
2262 goto nla_put_failure
;
2271 ctnetlink_glue_parse_ct(const struct nlattr
*cda
[], struct nf_conn
*ct
)
2275 if (cda
[CTA_TIMEOUT
]) {
2276 err
= ctnetlink_change_timeout(ct
, cda
);
2280 if (cda
[CTA_STATUS
]) {
2281 err
= ctnetlink_change_status(ct
, cda
);
2285 if (cda
[CTA_HELP
]) {
2286 err
= ctnetlink_change_helper(ct
, cda
);
2290 if (cda
[CTA_LABELS
]) {
2291 err
= ctnetlink_attach_labels(ct
, cda
);
2295 #if defined(CONFIG_NF_CONNTRACK_MARK)
2296 if (cda
[CTA_MARK
]) {
2297 u32 mask
= 0, mark
, newmark
;
2298 if (cda
[CTA_MARK_MASK
])
2299 mask
= ~ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
2301 mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
2302 newmark
= (ct
->mark
& mask
) ^ mark
;
2303 if (newmark
!= ct
->mark
)
2311 ctnetlink_glue_parse(const struct nlattr
*attr
, struct nf_conn
*ct
)
2313 struct nlattr
*cda
[CTA_MAX
+1];
2316 ret
= nla_parse_nested(cda
, CTA_MAX
, attr
, ct_nla_policy
);
2320 spin_lock_bh(&nf_conntrack_expect_lock
);
2321 ret
= ctnetlink_glue_parse_ct((const struct nlattr
**)cda
, ct
);
2322 spin_unlock_bh(&nf_conntrack_expect_lock
);
2327 static int ctnetlink_glue_exp_parse(const struct nlattr
* const *cda
,
2328 const struct nf_conn
*ct
,
2329 struct nf_conntrack_tuple
*tuple
,
2330 struct nf_conntrack_tuple
*mask
)
2334 err
= ctnetlink_parse_tuple(cda
, tuple
, CTA_EXPECT_TUPLE
,
2335 nf_ct_l3num(ct
), NULL
);
2339 return ctnetlink_parse_tuple(cda
, mask
, CTA_EXPECT_MASK
,
2340 nf_ct_l3num(ct
), NULL
);
2344 ctnetlink_glue_attach_expect(const struct nlattr
*attr
, struct nf_conn
*ct
,
2345 u32 portid
, u32 report
)
2347 struct nlattr
*cda
[CTA_EXPECT_MAX
+1];
2348 struct nf_conntrack_tuple tuple
, mask
;
2349 struct nf_conntrack_helper
*helper
= NULL
;
2350 struct nf_conntrack_expect
*exp
;
2353 err
= nla_parse_nested(cda
, CTA_EXPECT_MAX
, attr
, exp_nla_policy
);
2357 err
= ctnetlink_glue_exp_parse((const struct nlattr
* const *)cda
,
2362 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2363 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2365 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
2366 nf_ct_protonum(ct
));
2371 exp
= ctnetlink_alloc_expect((const struct nlattr
* const *)cda
, ct
,
2372 helper
, &tuple
, &mask
);
2374 return PTR_ERR(exp
);
2376 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2378 nf_ct_expect_put(exp
);
2385 static void ctnetlink_glue_seqadj(struct sk_buff
*skb
, struct nf_conn
*ct
,
2386 enum ip_conntrack_info ctinfo
, int diff
)
2388 if (!(ct
->status
& IPS_NAT_MASK
))
2391 nf_ct_tcp_seqadj_set(skb
, ct
, ctinfo
, diff
);
2394 static struct nfnl_ct_hook ctnetlink_glue_hook
= {
2395 .get_ct
= ctnetlink_glue_get_ct
,
2396 .build_size
= ctnetlink_glue_build_size
,
2397 .build
= ctnetlink_glue_build
,
2398 .parse
= ctnetlink_glue_parse
,
2399 .attach_expect
= ctnetlink_glue_attach_expect
,
2400 .seq_adjust
= ctnetlink_glue_seqadj
,
2402 #endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
2404 /***********************************************************************
2406 ***********************************************************************/
2409 ctnetlink_exp_dump_tuple(struct sk_buff
*skb
,
2410 const struct nf_conntrack_tuple
*tuple
,
2411 enum ctattr_expect type
)
2413 struct nlattr
*nest_parms
;
2415 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
2417 goto nla_put_failure
;
2418 if (ctnetlink_dump_tuples(skb
, tuple
) < 0)
2419 goto nla_put_failure
;
2420 nla_nest_end(skb
, nest_parms
);
2429 ctnetlink_exp_dump_mask(struct sk_buff
*skb
,
2430 const struct nf_conntrack_tuple
*tuple
,
2431 const struct nf_conntrack_tuple_mask
*mask
)
2434 struct nf_conntrack_l3proto
*l3proto
;
2435 struct nf_conntrack_l4proto
*l4proto
;
2436 struct nf_conntrack_tuple m
;
2437 struct nlattr
*nest_parms
;
2439 memset(&m
, 0xFF, sizeof(m
));
2440 memcpy(&m
.src
.u3
, &mask
->src
.u3
, sizeof(m
.src
.u3
));
2441 m
.src
.u
.all
= mask
->src
.u
.all
;
2442 m
.dst
.protonum
= tuple
->dst
.protonum
;
2444 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_MASK
| NLA_F_NESTED
);
2446 goto nla_put_failure
;
2449 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
2450 ret
= ctnetlink_dump_tuples_ip(skb
, &m
, l3proto
);
2452 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
,
2453 tuple
->dst
.protonum
);
2454 ret
= ctnetlink_dump_tuples_proto(skb
, &m
, l4proto
);
2458 if (unlikely(ret
< 0))
2459 goto nla_put_failure
;
2461 nla_nest_end(skb
, nest_parms
);
2469 static const union nf_inet_addr any_addr
;
2472 ctnetlink_exp_dump_expect(struct sk_buff
*skb
,
2473 const struct nf_conntrack_expect
*exp
)
2475 struct nf_conn
*master
= exp
->master
;
2476 long timeout
= ((long)exp
->timeout
.expires
- (long)jiffies
) / HZ
;
2477 struct nf_conn_help
*help
;
2478 #ifdef CONFIG_NF_NAT_NEEDED
2479 struct nlattr
*nest_parms
;
2480 struct nf_conntrack_tuple nat_tuple
= {};
2482 struct nf_ct_helper_expectfn
*expfn
;
2487 if (ctnetlink_exp_dump_tuple(skb
, &exp
->tuple
, CTA_EXPECT_TUPLE
) < 0)
2488 goto nla_put_failure
;
2489 if (ctnetlink_exp_dump_mask(skb
, &exp
->tuple
, &exp
->mask
) < 0)
2490 goto nla_put_failure
;
2491 if (ctnetlink_exp_dump_tuple(skb
,
2492 &master
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
2493 CTA_EXPECT_MASTER
) < 0)
2494 goto nla_put_failure
;
2496 #ifdef CONFIG_NF_NAT_NEEDED
2497 if (!nf_inet_addr_cmp(&exp
->saved_addr
, &any_addr
) ||
2498 exp
->saved_proto
.all
) {
2499 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_NAT
| NLA_F_NESTED
);
2501 goto nla_put_failure
;
2503 if (nla_put_be32(skb
, CTA_EXPECT_NAT_DIR
, htonl(exp
->dir
)))
2504 goto nla_put_failure
;
2506 nat_tuple
.src
.l3num
= nf_ct_l3num(master
);
2507 nat_tuple
.src
.u3
= exp
->saved_addr
;
2508 nat_tuple
.dst
.protonum
= nf_ct_protonum(master
);
2509 nat_tuple
.src
.u
= exp
->saved_proto
;
2511 if (ctnetlink_exp_dump_tuple(skb
, &nat_tuple
,
2512 CTA_EXPECT_NAT_TUPLE
) < 0)
2513 goto nla_put_failure
;
2514 nla_nest_end(skb
, nest_parms
);
2517 if (nla_put_be32(skb
, CTA_EXPECT_TIMEOUT
, htonl(timeout
)) ||
2518 nla_put_be32(skb
, CTA_EXPECT_ID
, htonl((unsigned long)exp
)) ||
2519 nla_put_be32(skb
, CTA_EXPECT_FLAGS
, htonl(exp
->flags
)) ||
2520 nla_put_be32(skb
, CTA_EXPECT_CLASS
, htonl(exp
->class)))
2521 goto nla_put_failure
;
2522 help
= nfct_help(master
);
2524 struct nf_conntrack_helper
*helper
;
2526 helper
= rcu_dereference(help
->helper
);
2528 nla_put_string(skb
, CTA_EXPECT_HELP_NAME
, helper
->name
))
2529 goto nla_put_failure
;
2531 expfn
= nf_ct_helper_expectfn_find_by_symbol(exp
->expectfn
);
2532 if (expfn
!= NULL
&&
2533 nla_put_string(skb
, CTA_EXPECT_FN
, expfn
->name
))
2534 goto nla_put_failure
;
2543 ctnetlink_exp_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
2544 int event
, const struct nf_conntrack_expect
*exp
)
2546 struct nlmsghdr
*nlh
;
2547 struct nfgenmsg
*nfmsg
;
2548 unsigned int flags
= portid
? NLM_F_MULTI
: 0;
2550 event
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2551 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
2555 nfmsg
= nlmsg_data(nlh
);
2556 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2557 nfmsg
->version
= NFNETLINK_V0
;
2560 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2561 goto nla_put_failure
;
2563 nlmsg_end(skb
, nlh
);
2568 nlmsg_cancel(skb
, nlh
);
2572 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2574 ctnetlink_expect_event(unsigned int events
, struct nf_exp_event
*item
)
2576 struct nf_conntrack_expect
*exp
= item
->exp
;
2577 struct net
*net
= nf_ct_exp_net(exp
);
2578 struct nlmsghdr
*nlh
;
2579 struct nfgenmsg
*nfmsg
;
2580 struct sk_buff
*skb
;
2581 unsigned int type
, group
;
2584 if (events
& (1 << IPEXP_DESTROY
)) {
2585 type
= IPCTNL_MSG_EXP_DELETE
;
2586 group
= NFNLGRP_CONNTRACK_EXP_DESTROY
;
2587 } else if (events
& (1 << IPEXP_NEW
)) {
2588 type
= IPCTNL_MSG_EXP_NEW
;
2589 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
2590 group
= NFNLGRP_CONNTRACK_EXP_NEW
;
2594 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
2597 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
2601 type
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2602 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
2606 nfmsg
= nlmsg_data(nlh
);
2607 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2608 nfmsg
->version
= NFNETLINK_V0
;
2612 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2613 goto nla_put_failure
;
2616 nlmsg_end(skb
, nlh
);
2617 nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
, GFP_ATOMIC
);
2622 nlmsg_cancel(skb
, nlh
);
2626 nfnetlink_set_err(net
, 0, 0, -ENOBUFS
);
2630 static int ctnetlink_exp_done(struct netlink_callback
*cb
)
2633 nf_ct_expect_put((struct nf_conntrack_expect
*)cb
->args
[1]);
2638 ctnetlink_exp_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2640 struct net
*net
= sock_net(skb
->sk
);
2641 struct nf_conntrack_expect
*exp
, *last
;
2642 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2643 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2646 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2647 for (; cb
->args
[0] < nf_ct_expect_hsize
; cb
->args
[0]++) {
2649 hlist_for_each_entry(exp
, &net
->ct
.expect_hash
[cb
->args
[0]],
2651 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2658 if (ctnetlink_exp_fill_info(skb
,
2659 NETLINK_CB(cb
->skb
).portid
,
2663 if (!atomic_inc_not_zero(&exp
->use
))
2665 cb
->args
[1] = (unsigned long)exp
;
2677 nf_ct_expect_put(last
);
2683 ctnetlink_exp_ct_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2685 struct nf_conntrack_expect
*exp
, *last
;
2686 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2687 struct nf_conn
*ct
= cb
->data
;
2688 struct nf_conn_help
*help
= nfct_help(ct
);
2689 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2695 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2697 hlist_for_each_entry(exp
, &help
->expectations
, lnode
) {
2698 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2705 if (ctnetlink_exp_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
2709 if (!atomic_inc_not_zero(&exp
->use
))
2711 cb
->args
[1] = (unsigned long)exp
;
2723 nf_ct_expect_put(last
);
2728 static int ctnetlink_dump_exp_ct(struct net
*net
, struct sock
*ctnl
,
2729 struct sk_buff
*skb
,
2730 const struct nlmsghdr
*nlh
,
2731 const struct nlattr
* const cda
[])
2734 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2735 u_int8_t u3
= nfmsg
->nfgen_family
;
2736 struct nf_conntrack_tuple tuple
;
2737 struct nf_conntrack_tuple_hash
*h
;
2739 struct nf_conntrack_zone zone
;
2740 struct netlink_dump_control c
= {
2741 .dump
= ctnetlink_exp_ct_dump_table
,
2742 .done
= ctnetlink_exp_done
,
2745 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
,
2750 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2754 h
= nf_conntrack_find_get(net
, &zone
, &tuple
);
2758 ct
= nf_ct_tuplehash_to_ctrack(h
);
2761 err
= netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2767 static int ctnetlink_get_expect(struct net
*net
, struct sock
*ctnl
,
2768 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
2769 const struct nlattr
* const cda
[])
2771 struct nf_conntrack_tuple tuple
;
2772 struct nf_conntrack_expect
*exp
;
2773 struct sk_buff
*skb2
;
2774 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2775 u_int8_t u3
= nfmsg
->nfgen_family
;
2776 struct nf_conntrack_zone zone
;
2779 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
2780 if (cda
[CTA_EXPECT_MASTER
])
2781 return ctnetlink_dump_exp_ct(net
, ctnl
, skb
, nlh
, cda
);
2783 struct netlink_dump_control c
= {
2784 .dump
= ctnetlink_exp_dump_table
,
2785 .done
= ctnetlink_exp_done
,
2787 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2791 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2795 if (cda
[CTA_EXPECT_TUPLE
])
2796 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
,
2798 else if (cda
[CTA_EXPECT_MASTER
])
2799 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
,
2807 exp
= nf_ct_expect_find_get(net
, &zone
, &tuple
);
2811 if (cda
[CTA_EXPECT_ID
]) {
2812 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2813 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2814 nf_ct_expect_put(exp
);
2820 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
2822 nf_ct_expect_put(exp
);
2827 err
= ctnetlink_exp_fill_info(skb2
, NETLINK_CB(skb
).portid
,
2828 nlh
->nlmsg_seq
, IPCTNL_MSG_EXP_NEW
, exp
);
2830 nf_ct_expect_put(exp
);
2834 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
2843 /* this avoids a loop in nfnetlink. */
2844 return err
== -EAGAIN
? -ENOBUFS
: err
;
2847 static int ctnetlink_del_expect(struct net
*net
, struct sock
*ctnl
,
2848 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
2849 const struct nlattr
* const cda
[])
2851 struct nf_conntrack_expect
*exp
;
2852 struct nf_conntrack_tuple tuple
;
2853 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2854 struct hlist_node
*next
;
2855 u_int8_t u3
= nfmsg
->nfgen_family
;
2856 struct nf_conntrack_zone zone
;
2860 if (cda
[CTA_EXPECT_TUPLE
]) {
2861 /* delete a single expect by tuple */
2862 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2866 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
,
2871 /* bump usage count to 2 */
2872 exp
= nf_ct_expect_find_get(net
, &zone
, &tuple
);
2876 if (cda
[CTA_EXPECT_ID
]) {
2877 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2878 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2879 nf_ct_expect_put(exp
);
2884 /* after list removal, usage count == 1 */
2885 spin_lock_bh(&nf_conntrack_expect_lock
);
2886 if (del_timer(&exp
->timeout
)) {
2887 nf_ct_unlink_expect_report(exp
, NETLINK_CB(skb
).portid
,
2889 nf_ct_expect_put(exp
);
2891 spin_unlock_bh(&nf_conntrack_expect_lock
);
2892 /* have to put what we 'get' above.
2893 * after this line usage count == 0 */
2894 nf_ct_expect_put(exp
);
2895 } else if (cda
[CTA_EXPECT_HELP_NAME
]) {
2896 char *name
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2897 struct nf_conn_help
*m_help
;
2899 /* delete all expectations for this helper */
2900 spin_lock_bh(&nf_conntrack_expect_lock
);
2901 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2902 hlist_for_each_entry_safe(exp
, next
,
2903 &net
->ct
.expect_hash
[i
],
2905 m_help
= nfct_help(exp
->master
);
2906 if (!strcmp(m_help
->helper
->name
, name
) &&
2907 del_timer(&exp
->timeout
)) {
2908 nf_ct_unlink_expect_report(exp
,
2909 NETLINK_CB(skb
).portid
,
2911 nf_ct_expect_put(exp
);
2915 spin_unlock_bh(&nf_conntrack_expect_lock
);
2917 /* This basically means we have to flush everything*/
2918 spin_lock_bh(&nf_conntrack_expect_lock
);
2919 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2920 hlist_for_each_entry_safe(exp
, next
,
2921 &net
->ct
.expect_hash
[i
],
2923 if (del_timer(&exp
->timeout
)) {
2924 nf_ct_unlink_expect_report(exp
,
2925 NETLINK_CB(skb
).portid
,
2927 nf_ct_expect_put(exp
);
2931 spin_unlock_bh(&nf_conntrack_expect_lock
);
2937 ctnetlink_change_expect(struct nf_conntrack_expect
*x
,
2938 const struct nlattr
* const cda
[])
2940 if (cda
[CTA_EXPECT_TIMEOUT
]) {
2941 if (!del_timer(&x
->timeout
))
2944 x
->timeout
.expires
= jiffies
+
2945 ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2946 add_timer(&x
->timeout
);
2951 static const struct nla_policy exp_nat_nla_policy
[CTA_EXPECT_NAT_MAX
+1] = {
2952 [CTA_EXPECT_NAT_DIR
] = { .type
= NLA_U32
},
2953 [CTA_EXPECT_NAT_TUPLE
] = { .type
= NLA_NESTED
},
2957 ctnetlink_parse_expect_nat(const struct nlattr
*attr
,
2958 struct nf_conntrack_expect
*exp
,
2961 #ifdef CONFIG_NF_NAT_NEEDED
2962 struct nlattr
*tb
[CTA_EXPECT_NAT_MAX
+1];
2963 struct nf_conntrack_tuple nat_tuple
= {};
2966 err
= nla_parse_nested(tb
, CTA_EXPECT_NAT_MAX
, attr
, exp_nat_nla_policy
);
2970 if (!tb
[CTA_EXPECT_NAT_DIR
] || !tb
[CTA_EXPECT_NAT_TUPLE
])
2973 err
= ctnetlink_parse_tuple((const struct nlattr
* const *)tb
,
2974 &nat_tuple
, CTA_EXPECT_NAT_TUPLE
,
2979 exp
->saved_addr
= nat_tuple
.src
.u3
;
2980 exp
->saved_proto
= nat_tuple
.src
.u
;
2981 exp
->dir
= ntohl(nla_get_be32(tb
[CTA_EXPECT_NAT_DIR
]));
2989 static struct nf_conntrack_expect
*
2990 ctnetlink_alloc_expect(const struct nlattr
* const cda
[], struct nf_conn
*ct
,
2991 struct nf_conntrack_helper
*helper
,
2992 struct nf_conntrack_tuple
*tuple
,
2993 struct nf_conntrack_tuple
*mask
)
2995 u_int32_t
class = 0;
2996 struct nf_conntrack_expect
*exp
;
2997 struct nf_conn_help
*help
;
3000 if (cda
[CTA_EXPECT_CLASS
] && helper
) {
3001 class = ntohl(nla_get_be32(cda
[CTA_EXPECT_CLASS
]));
3002 if (class > helper
->expect_class_max
)
3003 return ERR_PTR(-EINVAL
);
3005 exp
= nf_ct_expect_alloc(ct
);
3007 return ERR_PTR(-ENOMEM
);
3009 help
= nfct_help(ct
);
3011 if (!cda
[CTA_EXPECT_TIMEOUT
]) {
3015 exp
->timeout
.expires
=
3016 jiffies
+ ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
3018 exp
->flags
= NF_CT_EXPECT_USERSPACE
;
3019 if (cda
[CTA_EXPECT_FLAGS
]) {
3021 ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
3024 if (cda
[CTA_EXPECT_FLAGS
]) {
3025 exp
->flags
= ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
3026 exp
->flags
&= ~NF_CT_EXPECT_USERSPACE
;
3030 if (cda
[CTA_EXPECT_FN
]) {
3031 const char *name
= nla_data(cda
[CTA_EXPECT_FN
]);
3032 struct nf_ct_helper_expectfn
*expfn
;
3034 expfn
= nf_ct_helper_expectfn_find_by_name(name
);
3035 if (expfn
== NULL
) {
3039 exp
->expectfn
= expfn
->expectfn
;
3041 exp
->expectfn
= NULL
;
3045 exp
->helper
= helper
;
3046 exp
->tuple
= *tuple
;
3047 exp
->mask
.src
.u3
= mask
->src
.u3
;
3048 exp
->mask
.src
.u
.all
= mask
->src
.u
.all
;
3050 if (cda
[CTA_EXPECT_NAT
]) {
3051 err
= ctnetlink_parse_expect_nat(cda
[CTA_EXPECT_NAT
],
3052 exp
, nf_ct_l3num(ct
));
3058 nf_ct_expect_put(exp
);
3059 return ERR_PTR(err
);
3063 ctnetlink_create_expect(struct net
*net
,
3064 const struct nf_conntrack_zone
*zone
,
3065 const struct nlattr
* const cda
[],
3066 u_int8_t u3
, u32 portid
, int report
)
3068 struct nf_conntrack_tuple tuple
, mask
, master_tuple
;
3069 struct nf_conntrack_tuple_hash
*h
= NULL
;
3070 struct nf_conntrack_helper
*helper
= NULL
;
3071 struct nf_conntrack_expect
*exp
;
3075 /* caller guarantees that those three CTA_EXPECT_* exist */
3076 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
,
3080 err
= ctnetlink_parse_tuple(cda
, &mask
, CTA_EXPECT_MASK
,
3084 err
= ctnetlink_parse_tuple(cda
, &master_tuple
, CTA_EXPECT_MASTER
,
3089 /* Look for master conntrack of this expectation */
3090 h
= nf_conntrack_find_get(net
, zone
, &master_tuple
);
3093 ct
= nf_ct_tuplehash_to_ctrack(h
);
3095 if (cda
[CTA_EXPECT_HELP_NAME
]) {
3096 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
3098 helper
= __nf_conntrack_helper_find(helpname
, u3
,
3099 nf_ct_protonum(ct
));
3100 if (helper
== NULL
) {
3101 #ifdef CONFIG_MODULES
3102 if (request_module("nfct-helper-%s", helpname
) < 0) {
3106 helper
= __nf_conntrack_helper_find(helpname
, u3
,
3107 nf_ct_protonum(ct
));
3118 exp
= ctnetlink_alloc_expect(cda
, ct
, helper
, &tuple
, &mask
);
3124 err
= nf_ct_expect_related_report(exp
, portid
, report
);
3125 nf_ct_expect_put(exp
);
3131 static int ctnetlink_new_expect(struct net
*net
, struct sock
*ctnl
,
3132 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
3133 const struct nlattr
* const cda
[])
3135 struct nf_conntrack_tuple tuple
;
3136 struct nf_conntrack_expect
*exp
;
3137 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
3138 u_int8_t u3
= nfmsg
->nfgen_family
;
3139 struct nf_conntrack_zone zone
;
3142 if (!cda
[CTA_EXPECT_TUPLE
]
3143 || !cda
[CTA_EXPECT_MASK
]
3144 || !cda
[CTA_EXPECT_MASTER
])
3147 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
3151 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
,
3156 spin_lock_bh(&nf_conntrack_expect_lock
);
3157 exp
= __nf_ct_expect_find(net
, &zone
, &tuple
);
3159 spin_unlock_bh(&nf_conntrack_expect_lock
);
3161 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
3162 err
= ctnetlink_create_expect(net
, &zone
, cda
, u3
,
3163 NETLINK_CB(skb
).portid
,
3170 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
))
3171 err
= ctnetlink_change_expect(exp
, cda
);
3172 spin_unlock_bh(&nf_conntrack_expect_lock
);
3178 ctnetlink_exp_stat_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, int cpu
,
3179 const struct ip_conntrack_stat
*st
)
3181 struct nlmsghdr
*nlh
;
3182 struct nfgenmsg
*nfmsg
;
3183 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
3185 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_EXP_GET_STATS_CPU
);
3186 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
3190 nfmsg
= nlmsg_data(nlh
);
3191 nfmsg
->nfgen_family
= AF_UNSPEC
;
3192 nfmsg
->version
= NFNETLINK_V0
;
3193 nfmsg
->res_id
= htons(cpu
);
3195 if (nla_put_be32(skb
, CTA_STATS_EXP_NEW
, htonl(st
->expect_new
)) ||
3196 nla_put_be32(skb
, CTA_STATS_EXP_CREATE
, htonl(st
->expect_create
)) ||
3197 nla_put_be32(skb
, CTA_STATS_EXP_DELETE
, htonl(st
->expect_delete
)))
3198 goto nla_put_failure
;
3200 nlmsg_end(skb
, nlh
);
3205 nlmsg_cancel(skb
, nlh
);
3210 ctnetlink_exp_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3213 struct net
*net
= sock_net(skb
->sk
);
3215 if (cb
->args
[0] == nr_cpu_ids
)
3218 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
3219 const struct ip_conntrack_stat
*st
;
3221 if (!cpu_possible(cpu
))
3224 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
3225 if (ctnetlink_exp_stat_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
3235 static int ctnetlink_stat_exp_cpu(struct net
*net
, struct sock
*ctnl
,
3236 struct sk_buff
*skb
,
3237 const struct nlmsghdr
*nlh
,
3238 const struct nlattr
* const cda
[])
3240 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
3241 struct netlink_dump_control c
= {
3242 .dump
= ctnetlink_exp_stat_cpu_dump
,
3244 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
3250 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3251 static struct nf_ct_event_notifier ctnl_notifier
= {
3252 .fcn
= ctnetlink_conntrack_event
,
3255 static struct nf_exp_event_notifier ctnl_notifier_exp
= {
3256 .fcn
= ctnetlink_expect_event
,
3260 static const struct nfnl_callback ctnl_cb
[IPCTNL_MSG_MAX
] = {
3261 [IPCTNL_MSG_CT_NEW
] = { .call
= ctnetlink_new_conntrack
,
3262 .attr_count
= CTA_MAX
,
3263 .policy
= ct_nla_policy
},
3264 [IPCTNL_MSG_CT_GET
] = { .call
= ctnetlink_get_conntrack
,
3265 .attr_count
= CTA_MAX
,
3266 .policy
= ct_nla_policy
},
3267 [IPCTNL_MSG_CT_DELETE
] = { .call
= ctnetlink_del_conntrack
,
3268 .attr_count
= CTA_MAX
,
3269 .policy
= ct_nla_policy
},
3270 [IPCTNL_MSG_CT_GET_CTRZERO
] = { .call
= ctnetlink_get_conntrack
,
3271 .attr_count
= CTA_MAX
,
3272 .policy
= ct_nla_policy
},
3273 [IPCTNL_MSG_CT_GET_STATS_CPU
] = { .call
= ctnetlink_stat_ct_cpu
},
3274 [IPCTNL_MSG_CT_GET_STATS
] = { .call
= ctnetlink_stat_ct
},
3275 [IPCTNL_MSG_CT_GET_DYING
] = { .call
= ctnetlink_get_ct_dying
},
3276 [IPCTNL_MSG_CT_GET_UNCONFIRMED
] = { .call
= ctnetlink_get_ct_unconfirmed
},
3279 static const struct nfnl_callback ctnl_exp_cb
[IPCTNL_MSG_EXP_MAX
] = {
3280 [IPCTNL_MSG_EXP_GET
] = { .call
= ctnetlink_get_expect
,
3281 .attr_count
= CTA_EXPECT_MAX
,
3282 .policy
= exp_nla_policy
},
3283 [IPCTNL_MSG_EXP_NEW
] = { .call
= ctnetlink_new_expect
,
3284 .attr_count
= CTA_EXPECT_MAX
,
3285 .policy
= exp_nla_policy
},
3286 [IPCTNL_MSG_EXP_DELETE
] = { .call
= ctnetlink_del_expect
,
3287 .attr_count
= CTA_EXPECT_MAX
,
3288 .policy
= exp_nla_policy
},
3289 [IPCTNL_MSG_EXP_GET_STATS_CPU
] = { .call
= ctnetlink_stat_exp_cpu
},
3292 static const struct nfnetlink_subsystem ctnl_subsys
= {
3293 .name
= "conntrack",
3294 .subsys_id
= NFNL_SUBSYS_CTNETLINK
,
3295 .cb_count
= IPCTNL_MSG_MAX
,
3299 static const struct nfnetlink_subsystem ctnl_exp_subsys
= {
3300 .name
= "conntrack_expect",
3301 .subsys_id
= NFNL_SUBSYS_CTNETLINK_EXP
,
3302 .cb_count
= IPCTNL_MSG_EXP_MAX
,
3306 MODULE_ALIAS("ip_conntrack_netlink");
3307 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK
);
3308 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP
);
3310 static int __net_init
ctnetlink_net_init(struct net
*net
)
3312 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3315 ret
= nf_conntrack_register_notifier(net
, &ctnl_notifier
);
3317 pr_err("ctnetlink_init: cannot register notifier.\n");
3321 ret
= nf_ct_expect_register_notifier(net
, &ctnl_notifier_exp
);
3323 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3324 goto err_unreg_notifier
;
3329 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3331 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3337 static void ctnetlink_net_exit(struct net
*net
)
3339 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3340 nf_ct_expect_unregister_notifier(net
, &ctnl_notifier_exp
);
3341 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3345 static void __net_exit
ctnetlink_net_exit_batch(struct list_head
*net_exit_list
)
3349 list_for_each_entry(net
, net_exit_list
, exit_list
)
3350 ctnetlink_net_exit(net
);
3353 static struct pernet_operations ctnetlink_net_ops
= {
3354 .init
= ctnetlink_net_init
,
3355 .exit_batch
= ctnetlink_net_exit_batch
,
3358 static int __init
ctnetlink_init(void)
3362 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version
);
3363 ret
= nfnetlink_subsys_register(&ctnl_subsys
);
3365 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
3369 ret
= nfnetlink_subsys_register(&ctnl_exp_subsys
);
3371 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
3372 goto err_unreg_subsys
;
3375 ret
= register_pernet_subsys(&ctnetlink_net_ops
);
3377 pr_err("ctnetlink_init: cannot register pernet operations\n");
3378 goto err_unreg_exp_subsys
;
3380 #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
3381 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3382 RCU_INIT_POINTER(nfnl_ct_hook
, &ctnetlink_glue_hook
);
3386 err_unreg_exp_subsys
:
3387 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3389 nfnetlink_subsys_unregister(&ctnl_subsys
);
3394 static void __exit
ctnetlink_exit(void)
3396 pr_info("ctnetlink: unregistering from nfnetlink.\n");
3398 unregister_pernet_subsys(&ctnetlink_net_ops
);
3399 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3400 nfnetlink_subsys_unregister(&ctnl_subsys
);
3401 #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
3402 RCU_INIT_POINTER(nfnl_ct_hook
, NULL
);
3406 module_init(ctnetlink_init
);
3407 module_exit(ctnetlink_exit
);