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
, struct nf_conn_acct
*acct
,
215 enum ip_conntrack_dir dir
, int type
)
217 enum ctattr_type attr
= dir
? CTA_COUNTERS_REPLY
: CTA_COUNTERS_ORIG
;
218 struct nf_conn_counter
*counter
= acct
->counter
;
219 struct nlattr
*nest_count
;
222 if (type
== IPCTNL_MSG_CT_GET_CTRZERO
) {
223 pkts
= atomic64_xchg(&counter
[dir
].packets
, 0);
224 bytes
= atomic64_xchg(&counter
[dir
].bytes
, 0);
226 pkts
= atomic64_read(&counter
[dir
].packets
);
227 bytes
= atomic64_read(&counter
[dir
].bytes
);
230 nest_count
= nla_nest_start(skb
, attr
| NLA_F_NESTED
);
232 goto nla_put_failure
;
234 if (nla_put_be64(skb
, CTA_COUNTERS_PACKETS
, cpu_to_be64(pkts
)) ||
235 nla_put_be64(skb
, CTA_COUNTERS_BYTES
, cpu_to_be64(bytes
)))
236 goto nla_put_failure
;
238 nla_nest_end(skb
, nest_count
);
247 ctnetlink_dump_acct(struct sk_buff
*skb
, const struct nf_conn
*ct
, int type
)
249 struct nf_conn_acct
*acct
= nf_conn_acct_find(ct
);
254 if (dump_counters(skb
, acct
, IP_CT_DIR_ORIGINAL
, type
) < 0)
256 if (dump_counters(skb
, acct
, IP_CT_DIR_REPLY
, type
) < 0)
263 ctnetlink_dump_timestamp(struct sk_buff
*skb
, const struct nf_conn
*ct
)
265 struct nlattr
*nest_count
;
266 const struct nf_conn_tstamp
*tstamp
;
268 tstamp
= nf_conn_tstamp_find(ct
);
272 nest_count
= nla_nest_start(skb
, CTA_TIMESTAMP
| NLA_F_NESTED
);
274 goto nla_put_failure
;
276 if (nla_put_be64(skb
, CTA_TIMESTAMP_START
, cpu_to_be64(tstamp
->start
)) ||
277 (tstamp
->stop
!= 0 && nla_put_be64(skb
, CTA_TIMESTAMP_STOP
,
278 cpu_to_be64(tstamp
->stop
))))
279 goto nla_put_failure
;
280 nla_nest_end(skb
, nest_count
);
288 #ifdef CONFIG_NF_CONNTRACK_MARK
290 ctnetlink_dump_mark(struct sk_buff
*skb
, const struct nf_conn
*ct
)
292 if (nla_put_be32(skb
, CTA_MARK
, htonl(ct
->mark
)))
293 goto nla_put_failure
;
300 #define ctnetlink_dump_mark(a, b) (0)
303 #ifdef CONFIG_NF_CONNTRACK_SECMARK
305 ctnetlink_dump_secctx(struct sk_buff
*skb
, const struct nf_conn
*ct
)
307 struct nlattr
*nest_secctx
;
311 ret
= security_secid_to_secctx(ct
->secmark
, &secctx
, &len
);
316 nest_secctx
= nla_nest_start(skb
, CTA_SECCTX
| NLA_F_NESTED
);
318 goto nla_put_failure
;
320 if (nla_put_string(skb
, CTA_SECCTX_NAME
, secctx
))
321 goto nla_put_failure
;
322 nla_nest_end(skb
, nest_secctx
);
326 security_release_secctx(secctx
, len
);
330 #define ctnetlink_dump_secctx(a, b) (0)
333 #ifdef CONFIG_NF_CONNTRACK_LABELS
334 static int ctnetlink_label_size(const struct nf_conn
*ct
)
336 struct nf_conn_labels
*labels
= nf_ct_labels_find(ct
);
340 return nla_total_size(labels
->words
* sizeof(long));
344 ctnetlink_dump_labels(struct sk_buff
*skb
, const struct nf_conn
*ct
)
346 struct nf_conn_labels
*labels
= nf_ct_labels_find(ct
);
352 len
= labels
->words
* sizeof(long);
355 if (labels
->bits
[i
] != 0)
356 return nla_put(skb
, CTA_LABELS
, len
, labels
->bits
);
358 } while (i
< labels
->words
);
363 #define ctnetlink_dump_labels(a, b) (0)
364 #define ctnetlink_label_size(a) (0)
367 #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
370 ctnetlink_dump_master(struct sk_buff
*skb
, const struct nf_conn
*ct
)
372 struct nlattr
*nest_parms
;
374 if (!(ct
->status
& IPS_EXPECTED
))
377 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_MASTER
| NLA_F_NESTED
);
379 goto nla_put_failure
;
380 if (ctnetlink_dump_tuples(skb
, master_tuple(ct
)) < 0)
381 goto nla_put_failure
;
382 nla_nest_end(skb
, nest_parms
);
391 dump_ct_seq_adj(struct sk_buff
*skb
, const struct nf_ct_seqadj
*seq
, int type
)
393 struct nlattr
*nest_parms
;
395 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
397 goto nla_put_failure
;
399 if (nla_put_be32(skb
, CTA_SEQADJ_CORRECTION_POS
,
400 htonl(seq
->correction_pos
)) ||
401 nla_put_be32(skb
, CTA_SEQADJ_OFFSET_BEFORE
,
402 htonl(seq
->offset_before
)) ||
403 nla_put_be32(skb
, CTA_SEQADJ_OFFSET_AFTER
,
404 htonl(seq
->offset_after
)))
405 goto nla_put_failure
;
407 nla_nest_end(skb
, nest_parms
);
416 ctnetlink_dump_ct_seq_adj(struct sk_buff
*skb
, const struct nf_conn
*ct
)
418 struct nf_conn_seqadj
*seqadj
= nfct_seqadj(ct
);
419 struct nf_ct_seqadj
*seq
;
421 if (!(ct
->status
& IPS_SEQ_ADJUST
) || !seqadj
)
424 seq
= &seqadj
->seq
[IP_CT_DIR_ORIGINAL
];
425 if (dump_ct_seq_adj(skb
, seq
, CTA_SEQ_ADJ_ORIG
) == -1)
428 seq
= &seqadj
->seq
[IP_CT_DIR_REPLY
];
429 if (dump_ct_seq_adj(skb
, seq
, CTA_SEQ_ADJ_REPLY
) == -1)
436 ctnetlink_dump_id(struct sk_buff
*skb
, const struct nf_conn
*ct
)
438 if (nla_put_be32(skb
, CTA_ID
, htonl((unsigned long)ct
)))
439 goto nla_put_failure
;
447 ctnetlink_dump_use(struct sk_buff
*skb
, const struct nf_conn
*ct
)
449 if (nla_put_be32(skb
, CTA_USE
, htonl(atomic_read(&ct
->ct_general
.use
))))
450 goto nla_put_failure
;
458 ctnetlink_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
461 struct nlmsghdr
*nlh
;
462 struct nfgenmsg
*nfmsg
;
463 struct nlattr
*nest_parms
;
464 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
466 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_NEW
);
467 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
471 nfmsg
= nlmsg_data(nlh
);
472 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
473 nfmsg
->version
= NFNETLINK_V0
;
476 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
478 goto nla_put_failure
;
479 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
480 goto nla_put_failure
;
481 nla_nest_end(skb
, nest_parms
);
483 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
485 goto nla_put_failure
;
486 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
487 goto nla_put_failure
;
488 nla_nest_end(skb
, nest_parms
);
490 if (nf_ct_zone(ct
) &&
491 nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
492 goto nla_put_failure
;
494 if (ctnetlink_dump_status(skb
, ct
) < 0 ||
495 ctnetlink_dump_timeout(skb
, ct
) < 0 ||
496 ctnetlink_dump_acct(skb
, ct
, type
) < 0 ||
497 ctnetlink_dump_timestamp(skb
, ct
) < 0 ||
498 ctnetlink_dump_protoinfo(skb
, ct
) < 0 ||
499 ctnetlink_dump_helpinfo(skb
, ct
) < 0 ||
500 ctnetlink_dump_mark(skb
, ct
) < 0 ||
501 ctnetlink_dump_secctx(skb
, ct
) < 0 ||
502 ctnetlink_dump_labels(skb
, ct
) < 0 ||
503 ctnetlink_dump_id(skb
, ct
) < 0 ||
504 ctnetlink_dump_use(skb
, ct
) < 0 ||
505 ctnetlink_dump_master(skb
, ct
) < 0 ||
506 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
507 goto nla_put_failure
;
514 nlmsg_cancel(skb
, nlh
);
519 ctnetlink_proto_size(const struct nf_conn
*ct
)
521 struct nf_conntrack_l3proto
*l3proto
;
522 struct nf_conntrack_l4proto
*l4proto
;
526 l3proto
= __nf_ct_l3proto_find(nf_ct_l3num(ct
));
527 len
+= l3proto
->nla_size
;
529 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
530 len
+= l4proto
->nla_size
;
537 ctnetlink_acct_size(const struct nf_conn
*ct
)
539 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_ACCT
))
541 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
542 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
543 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
548 ctnetlink_secctx_size(const struct nf_conn
*ct
)
550 #ifdef CONFIG_NF_CONNTRACK_SECMARK
553 ret
= security_secid_to_secctx(ct
->secmark
, NULL
, &len
);
557 return nla_total_size(0) /* CTA_SECCTX */
558 + nla_total_size(sizeof(char) * len
); /* CTA_SECCTX_NAME */
565 ctnetlink_timestamp_size(const struct nf_conn
*ct
)
567 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
568 if (!nf_ct_ext_exist(ct
, NF_CT_EXT_TSTAMP
))
570 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
577 ctnetlink_nlmsg_size(const struct nf_conn
*ct
)
579 return NLMSG_ALIGN(sizeof(struct nfgenmsg
))
580 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
581 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
582 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
583 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
584 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
585 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
586 + ctnetlink_acct_size(ct
)
587 + ctnetlink_timestamp_size(ct
)
588 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
589 + nla_total_size(0) /* CTA_PROTOINFO */
590 + nla_total_size(0) /* CTA_HELP */
591 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
592 + ctnetlink_secctx_size(ct
)
593 #ifdef CONFIG_NF_NAT_NEEDED
594 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
595 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
597 #ifdef CONFIG_NF_CONNTRACK_MARK
598 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
600 #ifdef CONFIG_NF_CONNTRACK_ZONES
601 + nla_total_size(sizeof(u_int16_t
)) /* CTA_ZONE */
603 + ctnetlink_proto_size(ct
)
604 + ctnetlink_label_size(ct
)
608 #ifdef CONFIG_NF_CONNTRACK_EVENTS
610 ctnetlink_conntrack_event(unsigned int events
, struct nf_ct_event
*item
)
613 struct nlmsghdr
*nlh
;
614 struct nfgenmsg
*nfmsg
;
615 struct nlattr
*nest_parms
;
616 struct nf_conn
*ct
= item
->ct
;
619 unsigned int flags
= 0, group
;
622 /* ignore our fake conntrack entry */
623 if (nf_ct_is_untracked(ct
))
626 if (events
& (1 << IPCT_DESTROY
)) {
627 type
= IPCTNL_MSG_CT_DELETE
;
628 group
= NFNLGRP_CONNTRACK_DESTROY
;
629 } else if (events
& ((1 << IPCT_NEW
) | (1 << IPCT_RELATED
))) {
630 type
= IPCTNL_MSG_CT_NEW
;
631 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
632 group
= NFNLGRP_CONNTRACK_NEW
;
634 type
= IPCTNL_MSG_CT_NEW
;
635 group
= NFNLGRP_CONNTRACK_UPDATE
;
640 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
643 skb
= nlmsg_new(ctnetlink_nlmsg_size(ct
), GFP_ATOMIC
);
647 type
|= NFNL_SUBSYS_CTNETLINK
<< 8;
648 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
652 nfmsg
= nlmsg_data(nlh
);
653 nfmsg
->nfgen_family
= nf_ct_l3num(ct
);
654 nfmsg
->version
= NFNETLINK_V0
;
658 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
660 goto nla_put_failure
;
661 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
662 goto nla_put_failure
;
663 nla_nest_end(skb
, nest_parms
);
665 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
667 goto nla_put_failure
;
668 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
669 goto nla_put_failure
;
670 nla_nest_end(skb
, nest_parms
);
672 if (nf_ct_zone(ct
) &&
673 nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
674 goto nla_put_failure
;
676 if (ctnetlink_dump_id(skb
, ct
) < 0)
677 goto nla_put_failure
;
679 if (ctnetlink_dump_status(skb
, ct
) < 0)
680 goto nla_put_failure
;
682 if (events
& (1 << IPCT_DESTROY
)) {
683 if (ctnetlink_dump_acct(skb
, ct
, type
) < 0 ||
684 ctnetlink_dump_timestamp(skb
, ct
) < 0)
685 goto nla_put_failure
;
687 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
688 goto nla_put_failure
;
690 if (events
& (1 << IPCT_PROTOINFO
)
691 && ctnetlink_dump_protoinfo(skb
, ct
) < 0)
692 goto nla_put_failure
;
694 if ((events
& (1 << IPCT_HELPER
) || nfct_help(ct
))
695 && ctnetlink_dump_helpinfo(skb
, ct
) < 0)
696 goto nla_put_failure
;
698 #ifdef CONFIG_NF_CONNTRACK_SECMARK
699 if ((events
& (1 << IPCT_SECMARK
) || ct
->secmark
)
700 && ctnetlink_dump_secctx(skb
, ct
) < 0)
701 goto nla_put_failure
;
703 if (events
& (1 << IPCT_LABEL
) &&
704 ctnetlink_dump_labels(skb
, ct
) < 0)
705 goto nla_put_failure
;
707 if (events
& (1 << IPCT_RELATED
) &&
708 ctnetlink_dump_master(skb
, ct
) < 0)
709 goto nla_put_failure
;
711 if (events
& (1 << IPCT_SEQADJ
) &&
712 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
713 goto nla_put_failure
;
716 #ifdef CONFIG_NF_CONNTRACK_MARK
717 if ((events
& (1 << IPCT_MARK
) || ct
->mark
)
718 && ctnetlink_dump_mark(skb
, ct
) < 0)
719 goto nla_put_failure
;
724 err
= nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
,
726 if (err
== -ENOBUFS
|| err
== -EAGAIN
)
733 nlmsg_cancel(skb
, nlh
);
737 if (nfnetlink_set_err(net
, 0, group
, -ENOBUFS
) > 0)
742 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
744 static int ctnetlink_done(struct netlink_callback
*cb
)
747 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
753 struct ctnetlink_dump_filter
{
761 ctnetlink_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
763 struct net
*net
= sock_net(skb
->sk
);
764 struct nf_conn
*ct
, *last
;
765 struct nf_conntrack_tuple_hash
*h
;
766 struct hlist_nulls_node
*n
;
767 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
768 u_int8_t l3proto
= nfmsg
->nfgen_family
;
772 #ifdef CONFIG_NF_CONNTRACK_MARK
773 const struct ctnetlink_dump_filter
*filter
= cb
->data
;
776 last
= (struct nf_conn
*)cb
->args
[1];
779 for (; cb
->args
[0] < net
->ct
.htable_size
; cb
->args
[0]++) {
781 lockp
= &nf_conntrack_locks
[cb
->args
[0] % CONNTRACK_LOCKS
];
783 if (cb
->args
[0] >= net
->ct
.htable_size
) {
787 hlist_nulls_for_each_entry(h
, n
, &net
->ct
.hash
[cb
->args
[0]],
789 if (NF_CT_DIRECTION(h
) != IP_CT_DIR_ORIGINAL
)
791 ct
= nf_ct_tuplehash_to_ctrack(h
);
792 /* Dump entries of a given L3 protocol number.
793 * If it is not specified, ie. l3proto == 0,
794 * then dump everything. */
795 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
802 #ifdef CONFIG_NF_CONNTRACK_MARK
803 if (filter
&& !((ct
->mark
& filter
->mark
.mask
) ==
810 ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
812 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
816 nf_conntrack_get(&ct
->ct_general
);
817 cb
->args
[1] = (unsigned long)ct
;
837 ctnetlink_parse_tuple_ip(struct nlattr
*attr
, struct nf_conntrack_tuple
*tuple
)
839 struct nlattr
*tb
[CTA_IP_MAX
+1];
840 struct nf_conntrack_l3proto
*l3proto
;
843 ret
= nla_parse_nested(tb
, CTA_IP_MAX
, attr
, NULL
);
848 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
850 if (likely(l3proto
->nlattr_to_tuple
)) {
851 ret
= nla_validate_nested(attr
, CTA_IP_MAX
,
852 l3proto
->nla_policy
);
854 ret
= l3proto
->nlattr_to_tuple(tb
, tuple
);
862 static const struct nla_policy proto_nla_policy
[CTA_PROTO_MAX
+1] = {
863 [CTA_PROTO_NUM
] = { .type
= NLA_U8
},
867 ctnetlink_parse_tuple_proto(struct nlattr
*attr
,
868 struct nf_conntrack_tuple
*tuple
)
870 struct nlattr
*tb
[CTA_PROTO_MAX
+1];
871 struct nf_conntrack_l4proto
*l4proto
;
874 ret
= nla_parse_nested(tb
, CTA_PROTO_MAX
, attr
, proto_nla_policy
);
878 if (!tb
[CTA_PROTO_NUM
])
880 tuple
->dst
.protonum
= nla_get_u8(tb
[CTA_PROTO_NUM
]);
883 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
, tuple
->dst
.protonum
);
885 if (likely(l4proto
->nlattr_to_tuple
)) {
886 ret
= nla_validate_nested(attr
, CTA_PROTO_MAX
,
887 l4proto
->nla_policy
);
889 ret
= l4proto
->nlattr_to_tuple(tb
, tuple
);
897 static const struct nla_policy tuple_nla_policy
[CTA_TUPLE_MAX
+1] = {
898 [CTA_TUPLE_IP
] = { .type
= NLA_NESTED
},
899 [CTA_TUPLE_PROTO
] = { .type
= NLA_NESTED
},
903 ctnetlink_parse_tuple(const struct nlattr
* const cda
[],
904 struct nf_conntrack_tuple
*tuple
,
905 enum ctattr_type type
, u_int8_t l3num
)
907 struct nlattr
*tb
[CTA_TUPLE_MAX
+1];
910 memset(tuple
, 0, sizeof(*tuple
));
912 err
= nla_parse_nested(tb
, CTA_TUPLE_MAX
, cda
[type
], tuple_nla_policy
);
916 if (!tb
[CTA_TUPLE_IP
])
919 tuple
->src
.l3num
= l3num
;
921 err
= ctnetlink_parse_tuple_ip(tb
[CTA_TUPLE_IP
], tuple
);
925 if (!tb
[CTA_TUPLE_PROTO
])
928 err
= ctnetlink_parse_tuple_proto(tb
[CTA_TUPLE_PROTO
], tuple
);
932 /* orig and expect tuples get DIR_ORIGINAL */
933 if (type
== CTA_TUPLE_REPLY
)
934 tuple
->dst
.dir
= IP_CT_DIR_REPLY
;
936 tuple
->dst
.dir
= IP_CT_DIR_ORIGINAL
;
942 ctnetlink_parse_zone(const struct nlattr
*attr
, u16
*zone
)
945 #ifdef CONFIG_NF_CONNTRACK_ZONES
946 *zone
= ntohs(nla_get_be16(attr
));
956 static const struct nla_policy help_nla_policy
[CTA_HELP_MAX
+1] = {
957 [CTA_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
958 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
962 ctnetlink_parse_help(const struct nlattr
*attr
, char **helper_name
,
963 struct nlattr
**helpinfo
)
966 struct nlattr
*tb
[CTA_HELP_MAX
+1];
968 err
= nla_parse_nested(tb
, CTA_HELP_MAX
, attr
, help_nla_policy
);
972 if (!tb
[CTA_HELP_NAME
])
975 *helper_name
= nla_data(tb
[CTA_HELP_NAME
]);
977 if (tb
[CTA_HELP_INFO
])
978 *helpinfo
= tb
[CTA_HELP_INFO
];
983 static const struct nla_policy ct_nla_policy
[CTA_MAX
+1] = {
984 [CTA_TUPLE_ORIG
] = { .type
= NLA_NESTED
},
985 [CTA_TUPLE_REPLY
] = { .type
= NLA_NESTED
},
986 [CTA_STATUS
] = { .type
= NLA_U32
},
987 [CTA_PROTOINFO
] = { .type
= NLA_NESTED
},
988 [CTA_HELP
] = { .type
= NLA_NESTED
},
989 [CTA_NAT_SRC
] = { .type
= NLA_NESTED
},
990 [CTA_TIMEOUT
] = { .type
= NLA_U32
},
991 [CTA_MARK
] = { .type
= NLA_U32
},
992 [CTA_ID
] = { .type
= NLA_U32
},
993 [CTA_NAT_DST
] = { .type
= NLA_NESTED
},
994 [CTA_TUPLE_MASTER
] = { .type
= NLA_NESTED
},
995 [CTA_NAT_SEQ_ADJ_ORIG
] = { .type
= NLA_NESTED
},
996 [CTA_NAT_SEQ_ADJ_REPLY
] = { .type
= NLA_NESTED
},
997 [CTA_ZONE
] = { .type
= NLA_U16
},
998 [CTA_MARK_MASK
] = { .type
= NLA_U32
},
999 [CTA_LABELS
] = { .type
= NLA_BINARY
,
1000 .len
= NF_CT_LABELS_MAX_SIZE
},
1001 [CTA_LABELS_MASK
] = { .type
= NLA_BINARY
,
1002 .len
= NF_CT_LABELS_MAX_SIZE
},
1006 ctnetlink_del_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1007 const struct nlmsghdr
*nlh
,
1008 const struct nlattr
* const cda
[])
1010 struct net
*net
= sock_net(ctnl
);
1011 struct nf_conntrack_tuple_hash
*h
;
1012 struct nf_conntrack_tuple tuple
;
1014 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1015 u_int8_t u3
= nfmsg
->nfgen_family
;
1019 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1023 if (cda
[CTA_TUPLE_ORIG
])
1024 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
1025 else if (cda
[CTA_TUPLE_REPLY
])
1026 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
1028 /* Flush the whole table */
1029 nf_conntrack_flush_report(net
,
1030 NETLINK_CB(skb
).portid
,
1038 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
1042 ct
= nf_ct_tuplehash_to_ctrack(h
);
1045 u_int32_t id
= ntohl(nla_get_be32(cda
[CTA_ID
]));
1046 if (id
!= (u32
)(unsigned long)ct
) {
1052 if (del_timer(&ct
->timeout
))
1053 nf_ct_delete(ct
, NETLINK_CB(skb
).portid
, nlmsg_report(nlh
));
1061 ctnetlink_get_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1062 const struct nlmsghdr
*nlh
,
1063 const struct nlattr
* const cda
[])
1065 struct net
*net
= sock_net(ctnl
);
1066 struct nf_conntrack_tuple_hash
*h
;
1067 struct nf_conntrack_tuple tuple
;
1069 struct sk_buff
*skb2
= NULL
;
1070 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1071 u_int8_t u3
= nfmsg
->nfgen_family
;
1075 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1076 struct netlink_dump_control c
= {
1077 .dump
= ctnetlink_dump_table
,
1078 .done
= ctnetlink_done
,
1080 #ifdef CONFIG_NF_CONNTRACK_MARK
1081 if (cda
[CTA_MARK
] && cda
[CTA_MARK_MASK
]) {
1082 struct ctnetlink_dump_filter
*filter
;
1084 filter
= kzalloc(sizeof(struct ctnetlink_dump_filter
),
1089 filter
->mark
.val
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1091 ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
1095 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1098 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1102 if (cda
[CTA_TUPLE_ORIG
])
1103 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
1104 else if (cda
[CTA_TUPLE_REPLY
])
1105 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
1112 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
1116 ct
= nf_ct_tuplehash_to_ctrack(h
);
1119 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1126 err
= ctnetlink_fill_info(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
,
1127 NFNL_MSG_TYPE(nlh
->nlmsg_type
), ct
);
1133 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1142 /* this avoids a loop in nfnetlink. */
1143 return err
== -EAGAIN
? -ENOBUFS
: err
;
1146 static int ctnetlink_done_list(struct netlink_callback
*cb
)
1149 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
1154 ctnetlink_dump_list(struct sk_buff
*skb
, struct netlink_callback
*cb
, bool dying
)
1156 struct nf_conn
*ct
, *last
;
1157 struct nf_conntrack_tuple_hash
*h
;
1158 struct hlist_nulls_node
*n
;
1159 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
1160 u_int8_t l3proto
= nfmsg
->nfgen_family
;
1163 struct hlist_nulls_head
*list
;
1164 struct net
*net
= sock_net(skb
->sk
);
1169 last
= (struct nf_conn
*)cb
->args
[1];
1171 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
1172 struct ct_pcpu
*pcpu
;
1174 if (!cpu_possible(cpu
))
1177 pcpu
= per_cpu_ptr(net
->ct
.pcpu_lists
, cpu
);
1178 spin_lock_bh(&pcpu
->lock
);
1179 list
= dying
? &pcpu
->dying
: &pcpu
->unconfirmed
;
1181 hlist_nulls_for_each_entry(h
, n
, list
, hnnode
) {
1182 ct
= nf_ct_tuplehash_to_ctrack(h
);
1183 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
1191 res
= ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
1193 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
1197 if (!atomic_inc_not_zero(&ct
->ct_general
.use
))
1200 cb
->args
[1] = (unsigned long)ct
;
1201 spin_unlock_bh(&pcpu
->lock
);
1209 spin_unlock_bh(&pcpu
->lock
);
1220 ctnetlink_dump_dying(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1222 return ctnetlink_dump_list(skb
, cb
, true);
1226 ctnetlink_get_ct_dying(struct sock
*ctnl
, struct sk_buff
*skb
,
1227 const struct nlmsghdr
*nlh
,
1228 const struct nlattr
* const cda
[])
1230 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1231 struct netlink_dump_control c
= {
1232 .dump
= ctnetlink_dump_dying
,
1233 .done
= ctnetlink_done_list
,
1235 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1242 ctnetlink_dump_unconfirmed(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1244 return ctnetlink_dump_list(skb
, cb
, false);
1248 ctnetlink_get_ct_unconfirmed(struct sock
*ctnl
, struct sk_buff
*skb
,
1249 const struct nlmsghdr
*nlh
,
1250 const struct nlattr
* const cda
[])
1252 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1253 struct netlink_dump_control c
= {
1254 .dump
= ctnetlink_dump_unconfirmed
,
1255 .done
= ctnetlink_done_list
,
1257 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1263 #ifdef CONFIG_NF_NAT_NEEDED
1265 ctnetlink_parse_nat_setup(struct nf_conn
*ct
,
1266 enum nf_nat_manip_type manip
,
1267 const struct nlattr
*attr
)
1269 typeof(nfnetlink_parse_nat_setup_hook
) parse_nat_setup
;
1272 parse_nat_setup
= rcu_dereference(nfnetlink_parse_nat_setup_hook
);
1273 if (!parse_nat_setup
) {
1274 #ifdef CONFIG_MODULES
1276 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1277 if (request_module("nf-nat") < 0) {
1278 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1282 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1284 if (nfnetlink_parse_nat_setup_hook
)
1290 err
= parse_nat_setup(ct
, manip
, attr
);
1291 if (err
== -EAGAIN
) {
1292 #ifdef CONFIG_MODULES
1294 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1295 if (request_module("nf-nat-%u", nf_ct_l3num(ct
)) < 0) {
1296 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1300 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1311 ctnetlink_change_status(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1314 unsigned int status
= ntohl(nla_get_be32(cda
[CTA_STATUS
]));
1315 d
= ct
->status
^ status
;
1317 if (d
& (IPS_EXPECTED
|IPS_CONFIRMED
|IPS_DYING
))
1321 if (d
& IPS_SEEN_REPLY
&& !(status
& IPS_SEEN_REPLY
))
1322 /* SEEN_REPLY bit can only be set */
1325 if (d
& IPS_ASSURED
&& !(status
& IPS_ASSURED
))
1326 /* ASSURED bit can only be set */
1329 /* Be careful here, modifying NAT bits can screw up things,
1330 * so don't let users modify them directly if they don't pass
1332 ct
->status
|= status
& ~(IPS_NAT_DONE_MASK
| IPS_NAT_MASK
);
1337 ctnetlink_setup_nat(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1339 #ifdef CONFIG_NF_NAT_NEEDED
1342 if (!cda
[CTA_NAT_DST
] && !cda
[CTA_NAT_SRC
])
1345 ret
= ctnetlink_parse_nat_setup(ct
, NF_NAT_MANIP_DST
,
1350 ret
= ctnetlink_parse_nat_setup(ct
, NF_NAT_MANIP_SRC
,
1354 if (!cda
[CTA_NAT_DST
] && !cda
[CTA_NAT_SRC
])
1361 ctnetlink_change_helper(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1363 struct nf_conntrack_helper
*helper
;
1364 struct nf_conn_help
*help
= nfct_help(ct
);
1365 char *helpname
= NULL
;
1366 struct nlattr
*helpinfo
= NULL
;
1369 /* don't change helper of sibling connections */
1373 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1377 if (!strcmp(helpname
, "")) {
1378 if (help
&& help
->helper
) {
1379 /* we had a helper before ... */
1380 nf_ct_remove_expectations(ct
);
1381 RCU_INIT_POINTER(help
->helper
, NULL
);
1387 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1388 nf_ct_protonum(ct
));
1389 if (helper
== NULL
) {
1390 #ifdef CONFIG_MODULES
1391 spin_unlock_bh(&nf_conntrack_expect_lock
);
1393 if (request_module("nfct-helper-%s", helpname
) < 0) {
1394 spin_lock_bh(&nf_conntrack_expect_lock
);
1398 spin_lock_bh(&nf_conntrack_expect_lock
);
1399 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1400 nf_ct_protonum(ct
));
1408 if (help
->helper
== helper
) {
1409 /* update private helper data if allowed. */
1410 if (helper
->from_nlattr
)
1411 helper
->from_nlattr(helpinfo
, ct
);
1417 /* we cannot set a helper for an existing conntrack */
1422 ctnetlink_change_timeout(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1424 u_int32_t timeout
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1426 if (!del_timer(&ct
->timeout
))
1429 ct
->timeout
.expires
= jiffies
+ timeout
* HZ
;
1430 add_timer(&ct
->timeout
);
1435 static const struct nla_policy protoinfo_policy
[CTA_PROTOINFO_MAX
+1] = {
1436 [CTA_PROTOINFO_TCP
] = { .type
= NLA_NESTED
},
1437 [CTA_PROTOINFO_DCCP
] = { .type
= NLA_NESTED
},
1438 [CTA_PROTOINFO_SCTP
] = { .type
= NLA_NESTED
},
1442 ctnetlink_change_protoinfo(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1444 const struct nlattr
*attr
= cda
[CTA_PROTOINFO
];
1445 struct nlattr
*tb
[CTA_PROTOINFO_MAX
+1];
1446 struct nf_conntrack_l4proto
*l4proto
;
1449 err
= nla_parse_nested(tb
, CTA_PROTOINFO_MAX
, attr
, protoinfo_policy
);
1454 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
1455 if (l4proto
->from_nlattr
)
1456 err
= l4proto
->from_nlattr(tb
, ct
);
1462 static const struct nla_policy seqadj_policy
[CTA_SEQADJ_MAX
+1] = {
1463 [CTA_SEQADJ_CORRECTION_POS
] = { .type
= NLA_U32
},
1464 [CTA_SEQADJ_OFFSET_BEFORE
] = { .type
= NLA_U32
},
1465 [CTA_SEQADJ_OFFSET_AFTER
] = { .type
= NLA_U32
},
1469 change_seq_adj(struct nf_ct_seqadj
*seq
, const struct nlattr
* const attr
)
1472 struct nlattr
*cda
[CTA_SEQADJ_MAX
+1];
1474 err
= nla_parse_nested(cda
, CTA_SEQADJ_MAX
, attr
, seqadj_policy
);
1478 if (!cda
[CTA_SEQADJ_CORRECTION_POS
])
1481 seq
->correction_pos
=
1482 ntohl(nla_get_be32(cda
[CTA_SEQADJ_CORRECTION_POS
]));
1484 if (!cda
[CTA_SEQADJ_OFFSET_BEFORE
])
1487 seq
->offset_before
=
1488 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_BEFORE
]));
1490 if (!cda
[CTA_SEQADJ_OFFSET_AFTER
])
1494 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_AFTER
]));
1500 ctnetlink_change_seq_adj(struct nf_conn
*ct
,
1501 const struct nlattr
* const cda
[])
1503 struct nf_conn_seqadj
*seqadj
= nfct_seqadj(ct
);
1509 if (cda
[CTA_SEQ_ADJ_ORIG
]) {
1510 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_ORIGINAL
],
1511 cda
[CTA_SEQ_ADJ_ORIG
]);
1515 ct
->status
|= IPS_SEQ_ADJUST
;
1518 if (cda
[CTA_SEQ_ADJ_REPLY
]) {
1519 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_REPLY
],
1520 cda
[CTA_SEQ_ADJ_REPLY
]);
1524 ct
->status
|= IPS_SEQ_ADJUST
;
1531 ctnetlink_attach_labels(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1533 #ifdef CONFIG_NF_CONNTRACK_LABELS
1534 size_t len
= nla_len(cda
[CTA_LABELS
]);
1535 const void *mask
= cda
[CTA_LABELS_MASK
];
1537 if (len
& (sizeof(u32
)-1)) /* must be multiple of u32 */
1541 if (nla_len(cda
[CTA_LABELS_MASK
]) == 0 ||
1542 nla_len(cda
[CTA_LABELS_MASK
]) != len
)
1544 mask
= nla_data(cda
[CTA_LABELS_MASK
]);
1549 return nf_connlabels_replace(ct
, nla_data(cda
[CTA_LABELS
]), mask
, len
);
1556 ctnetlink_change_conntrack(struct nf_conn
*ct
,
1557 const struct nlattr
* const cda
[])
1561 /* only allow NAT changes and master assignation for new conntracks */
1562 if (cda
[CTA_NAT_SRC
] || cda
[CTA_NAT_DST
] || cda
[CTA_TUPLE_MASTER
])
1565 if (cda
[CTA_HELP
]) {
1566 err
= ctnetlink_change_helper(ct
, cda
);
1571 if (cda
[CTA_TIMEOUT
]) {
1572 err
= ctnetlink_change_timeout(ct
, cda
);
1577 if (cda
[CTA_STATUS
]) {
1578 err
= ctnetlink_change_status(ct
, cda
);
1583 if (cda
[CTA_PROTOINFO
]) {
1584 err
= ctnetlink_change_protoinfo(ct
, cda
);
1589 #if defined(CONFIG_NF_CONNTRACK_MARK)
1591 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1594 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1595 err
= ctnetlink_change_seq_adj(ct
, cda
);
1600 if (cda
[CTA_LABELS
]) {
1601 err
= ctnetlink_attach_labels(ct
, cda
);
1609 static struct nf_conn
*
1610 ctnetlink_create_conntrack(struct net
*net
, u16 zone
,
1611 const struct nlattr
* const cda
[],
1612 struct nf_conntrack_tuple
*otuple
,
1613 struct nf_conntrack_tuple
*rtuple
,
1618 struct nf_conntrack_helper
*helper
;
1619 struct nf_conn_tstamp
*tstamp
;
1621 ct
= nf_conntrack_alloc(net
, zone
, otuple
, rtuple
, GFP_ATOMIC
);
1623 return ERR_PTR(-ENOMEM
);
1625 if (!cda
[CTA_TIMEOUT
])
1627 ct
->timeout
.expires
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1629 ct
->timeout
.expires
= jiffies
+ ct
->timeout
.expires
* HZ
;
1632 if (cda
[CTA_HELP
]) {
1633 char *helpname
= NULL
;
1634 struct nlattr
*helpinfo
= NULL
;
1636 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1640 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1641 nf_ct_protonum(ct
));
1642 if (helper
== NULL
) {
1644 #ifdef CONFIG_MODULES
1645 if (request_module("nfct-helper-%s", helpname
) < 0) {
1651 helper
= __nf_conntrack_helper_find(helpname
,
1653 nf_ct_protonum(ct
));
1663 struct nf_conn_help
*help
;
1665 help
= nf_ct_helper_ext_add(ct
, helper
, GFP_ATOMIC
);
1670 /* set private helper data if allowed. */
1671 if (helper
->from_nlattr
)
1672 helper
->from_nlattr(helpinfo
, ct
);
1674 /* not in hash table yet so not strictly necessary */
1675 RCU_INIT_POINTER(help
->helper
, helper
);
1678 /* try an implicit helper assignation */
1679 err
= __nf_ct_try_assign_helper(ct
, NULL
, GFP_ATOMIC
);
1684 err
= ctnetlink_setup_nat(ct
, cda
);
1688 nf_ct_acct_ext_add(ct
, GFP_ATOMIC
);
1689 nf_ct_tstamp_ext_add(ct
, GFP_ATOMIC
);
1690 nf_ct_ecache_ext_add(ct
, 0, 0, GFP_ATOMIC
);
1691 nf_ct_labels_ext_add(ct
);
1693 /* we must add conntrack extensions before confirmation. */
1694 ct
->status
|= IPS_CONFIRMED
;
1696 if (cda
[CTA_STATUS
]) {
1697 err
= ctnetlink_change_status(ct
, cda
);
1702 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1703 err
= ctnetlink_change_seq_adj(ct
, cda
);
1708 memset(&ct
->proto
, 0, sizeof(ct
->proto
));
1709 if (cda
[CTA_PROTOINFO
]) {
1710 err
= ctnetlink_change_protoinfo(ct
, cda
);
1715 #if defined(CONFIG_NF_CONNTRACK_MARK)
1717 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1720 /* setup master conntrack: this is a confirmed expectation */
1721 if (cda
[CTA_TUPLE_MASTER
]) {
1722 struct nf_conntrack_tuple master
;
1723 struct nf_conntrack_tuple_hash
*master_h
;
1724 struct nf_conn
*master_ct
;
1726 err
= ctnetlink_parse_tuple(cda
, &master
, CTA_TUPLE_MASTER
, u3
);
1730 master_h
= nf_conntrack_find_get(net
, zone
, &master
);
1731 if (master_h
== NULL
) {
1735 master_ct
= nf_ct_tuplehash_to_ctrack(master_h
);
1736 __set_bit(IPS_EXPECTED_BIT
, &ct
->status
);
1737 ct
->master
= master_ct
;
1739 tstamp
= nf_conn_tstamp_find(ct
);
1741 tstamp
->start
= ktime_to_ns(ktime_get_real());
1743 err
= nf_conntrack_hash_check_insert(ct
);
1754 nf_conntrack_free(ct
);
1755 return ERR_PTR(err
);
1759 ctnetlink_new_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1760 const struct nlmsghdr
*nlh
,
1761 const struct nlattr
* const cda
[])
1763 struct net
*net
= sock_net(ctnl
);
1764 struct nf_conntrack_tuple otuple
, rtuple
;
1765 struct nf_conntrack_tuple_hash
*h
= NULL
;
1766 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1768 u_int8_t u3
= nfmsg
->nfgen_family
;
1772 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1776 if (cda
[CTA_TUPLE_ORIG
]) {
1777 err
= ctnetlink_parse_tuple(cda
, &otuple
, CTA_TUPLE_ORIG
, u3
);
1782 if (cda
[CTA_TUPLE_REPLY
]) {
1783 err
= ctnetlink_parse_tuple(cda
, &rtuple
, CTA_TUPLE_REPLY
, u3
);
1788 if (cda
[CTA_TUPLE_ORIG
])
1789 h
= nf_conntrack_find_get(net
, zone
, &otuple
);
1790 else if (cda
[CTA_TUPLE_REPLY
])
1791 h
= nf_conntrack_find_get(net
, zone
, &rtuple
);
1795 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
1796 enum ip_conntrack_events events
;
1798 if (!cda
[CTA_TUPLE_ORIG
] || !cda
[CTA_TUPLE_REPLY
])
1801 ct
= ctnetlink_create_conntrack(net
, zone
, cda
, &otuple
,
1807 if (test_bit(IPS_EXPECTED_BIT
, &ct
->status
))
1808 events
= IPCT_RELATED
;
1812 if (cda
[CTA_LABELS
] &&
1813 ctnetlink_attach_labels(ct
, cda
) == 0)
1814 events
|= (1 << IPCT_LABEL
);
1816 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1817 (1 << IPCT_ASSURED
) |
1818 (1 << IPCT_HELPER
) |
1819 (1 << IPCT_PROTOINFO
) |
1820 (1 << IPCT_SEQADJ
) |
1821 (1 << IPCT_MARK
) | events
,
1822 ct
, NETLINK_CB(skb
).portid
,
1829 /* implicit 'else' */
1832 ct
= nf_ct_tuplehash_to_ctrack(h
);
1833 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
)) {
1834 spin_lock_bh(&nf_conntrack_expect_lock
);
1835 err
= ctnetlink_change_conntrack(ct
, cda
);
1836 spin_unlock_bh(&nf_conntrack_expect_lock
);
1838 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1839 (1 << IPCT_ASSURED
) |
1840 (1 << IPCT_HELPER
) |
1842 (1 << IPCT_PROTOINFO
) |
1843 (1 << IPCT_SEQADJ
) |
1845 ct
, NETLINK_CB(skb
).portid
,
1855 ctnetlink_ct_stat_cpu_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
1856 __u16 cpu
, const struct ip_conntrack_stat
*st
)
1858 struct nlmsghdr
*nlh
;
1859 struct nfgenmsg
*nfmsg
;
1860 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1862 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS_CPU
);
1863 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1867 nfmsg
= nlmsg_data(nlh
);
1868 nfmsg
->nfgen_family
= AF_UNSPEC
;
1869 nfmsg
->version
= NFNETLINK_V0
;
1870 nfmsg
->res_id
= htons(cpu
);
1872 if (nla_put_be32(skb
, CTA_STATS_SEARCHED
, htonl(st
->searched
)) ||
1873 nla_put_be32(skb
, CTA_STATS_FOUND
, htonl(st
->found
)) ||
1874 nla_put_be32(skb
, CTA_STATS_NEW
, htonl(st
->new)) ||
1875 nla_put_be32(skb
, CTA_STATS_INVALID
, htonl(st
->invalid
)) ||
1876 nla_put_be32(skb
, CTA_STATS_IGNORE
, htonl(st
->ignore
)) ||
1877 nla_put_be32(skb
, CTA_STATS_DELETE
, htonl(st
->delete)) ||
1878 nla_put_be32(skb
, CTA_STATS_DELETE_LIST
, htonl(st
->delete_list
)) ||
1879 nla_put_be32(skb
, CTA_STATS_INSERT
, htonl(st
->insert
)) ||
1880 nla_put_be32(skb
, CTA_STATS_INSERT_FAILED
,
1881 htonl(st
->insert_failed
)) ||
1882 nla_put_be32(skb
, CTA_STATS_DROP
, htonl(st
->drop
)) ||
1883 nla_put_be32(skb
, CTA_STATS_EARLY_DROP
, htonl(st
->early_drop
)) ||
1884 nla_put_be32(skb
, CTA_STATS_ERROR
, htonl(st
->error
)) ||
1885 nla_put_be32(skb
, CTA_STATS_SEARCH_RESTART
,
1886 htonl(st
->search_restart
)))
1887 goto nla_put_failure
;
1889 nlmsg_end(skb
, nlh
);
1894 nlmsg_cancel(skb
, nlh
);
1899 ctnetlink_ct_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1902 struct net
*net
= sock_net(skb
->sk
);
1904 if (cb
->args
[0] == nr_cpu_ids
)
1907 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
1908 const struct ip_conntrack_stat
*st
;
1910 if (!cpu_possible(cpu
))
1913 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
1914 if (ctnetlink_ct_stat_cpu_fill_info(skb
,
1915 NETLINK_CB(cb
->skb
).portid
,
1926 ctnetlink_stat_ct_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
1927 const struct nlmsghdr
*nlh
,
1928 const struct nlattr
* const cda
[])
1930 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1931 struct netlink_dump_control c
= {
1932 .dump
= ctnetlink_ct_stat_cpu_dump
,
1934 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1941 ctnetlink_stat_ct_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
1944 struct nlmsghdr
*nlh
;
1945 struct nfgenmsg
*nfmsg
;
1946 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1947 unsigned int nr_conntracks
= atomic_read(&net
->ct
.count
);
1949 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS
);
1950 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1954 nfmsg
= nlmsg_data(nlh
);
1955 nfmsg
->nfgen_family
= AF_UNSPEC
;
1956 nfmsg
->version
= NFNETLINK_V0
;
1959 if (nla_put_be32(skb
, CTA_STATS_GLOBAL_ENTRIES
, htonl(nr_conntracks
)))
1960 goto nla_put_failure
;
1962 nlmsg_end(skb
, nlh
);
1967 nlmsg_cancel(skb
, nlh
);
1972 ctnetlink_stat_ct(struct sock
*ctnl
, struct sk_buff
*skb
,
1973 const struct nlmsghdr
*nlh
,
1974 const struct nlattr
* const cda
[])
1976 struct sk_buff
*skb2
;
1979 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1983 err
= ctnetlink_stat_ct_fill_info(skb2
, NETLINK_CB(skb
).portid
,
1985 NFNL_MSG_TYPE(nlh
->nlmsg_type
),
1990 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1999 /* this avoids a loop in nfnetlink. */
2000 return err
== -EAGAIN
? -ENOBUFS
: err
;
2003 static const struct nla_policy exp_nla_policy
[CTA_EXPECT_MAX
+1] = {
2004 [CTA_EXPECT_MASTER
] = { .type
= NLA_NESTED
},
2005 [CTA_EXPECT_TUPLE
] = { .type
= NLA_NESTED
},
2006 [CTA_EXPECT_MASK
] = { .type
= NLA_NESTED
},
2007 [CTA_EXPECT_TIMEOUT
] = { .type
= NLA_U32
},
2008 [CTA_EXPECT_ID
] = { .type
= NLA_U32
},
2009 [CTA_EXPECT_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
2010 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
2011 [CTA_EXPECT_ZONE
] = { .type
= NLA_U16
},
2012 [CTA_EXPECT_FLAGS
] = { .type
= NLA_U32
},
2013 [CTA_EXPECT_CLASS
] = { .type
= NLA_U32
},
2014 [CTA_EXPECT_NAT
] = { .type
= NLA_NESTED
},
2015 [CTA_EXPECT_FN
] = { .type
= NLA_NUL_STRING
},
2018 static struct nf_conntrack_expect
*
2019 ctnetlink_alloc_expect(const struct nlattr
*const cda
[], struct nf_conn
*ct
,
2020 struct nf_conntrack_helper
*helper
,
2021 struct nf_conntrack_tuple
*tuple
,
2022 struct nf_conntrack_tuple
*mask
);
2024 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
2026 ctnetlink_nfqueue_build_size(const struct nf_conn
*ct
)
2028 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2029 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2030 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2031 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
2032 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
2033 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
2034 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
2035 + nla_total_size(0) /* CTA_PROTOINFO */
2036 + nla_total_size(0) /* CTA_HELP */
2037 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
2038 + ctnetlink_secctx_size(ct
)
2039 #ifdef CONFIG_NF_NAT_NEEDED
2040 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2041 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
2043 #ifdef CONFIG_NF_CONNTRACK_MARK
2044 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
2046 #ifdef CONFIG_NF_CONNTRACK_ZONES
2047 + nla_total_size(sizeof(u_int16_t
)) /* CTA_ZONE */
2049 + ctnetlink_proto_size(ct
)
2054 ctnetlink_nfqueue_build(struct sk_buff
*skb
, struct nf_conn
*ct
)
2056 struct nlattr
*nest_parms
;
2059 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
2061 goto nla_put_failure
;
2062 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
2063 goto nla_put_failure
;
2064 nla_nest_end(skb
, nest_parms
);
2066 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
2068 goto nla_put_failure
;
2069 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
2070 goto nla_put_failure
;
2071 nla_nest_end(skb
, nest_parms
);
2073 if (nf_ct_zone(ct
)) {
2074 if (nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
2075 goto nla_put_failure
;
2078 if (ctnetlink_dump_id(skb
, ct
) < 0)
2079 goto nla_put_failure
;
2081 if (ctnetlink_dump_status(skb
, ct
) < 0)
2082 goto nla_put_failure
;
2084 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
2085 goto nla_put_failure
;
2087 if (ctnetlink_dump_protoinfo(skb
, ct
) < 0)
2088 goto nla_put_failure
;
2090 if (ctnetlink_dump_helpinfo(skb
, ct
) < 0)
2091 goto nla_put_failure
;
2093 #ifdef CONFIG_NF_CONNTRACK_SECMARK
2094 if (ct
->secmark
&& ctnetlink_dump_secctx(skb
, ct
) < 0)
2095 goto nla_put_failure
;
2097 if (ct
->master
&& ctnetlink_dump_master(skb
, ct
) < 0)
2098 goto nla_put_failure
;
2100 if ((ct
->status
& IPS_SEQ_ADJUST
) &&
2101 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
2102 goto nla_put_failure
;
2104 #ifdef CONFIG_NF_CONNTRACK_MARK
2105 if (ct
->mark
&& ctnetlink_dump_mark(skb
, ct
) < 0)
2106 goto nla_put_failure
;
2108 if (ctnetlink_dump_labels(skb
, ct
) < 0)
2109 goto nla_put_failure
;
2119 ctnetlink_nfqueue_parse_ct(const struct nlattr
*cda
[], struct nf_conn
*ct
)
2123 if (cda
[CTA_TIMEOUT
]) {
2124 err
= ctnetlink_change_timeout(ct
, cda
);
2128 if (cda
[CTA_STATUS
]) {
2129 err
= ctnetlink_change_status(ct
, cda
);
2133 if (cda
[CTA_HELP
]) {
2134 err
= ctnetlink_change_helper(ct
, cda
);
2138 if (cda
[CTA_LABELS
]) {
2139 err
= ctnetlink_attach_labels(ct
, cda
);
2143 #if defined(CONFIG_NF_CONNTRACK_MARK)
2144 if (cda
[CTA_MARK
]) {
2145 u32 mask
= 0, mark
, newmark
;
2146 if (cda
[CTA_MARK_MASK
])
2147 mask
= ~ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
2149 mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
2150 newmark
= (ct
->mark
& mask
) ^ mark
;
2151 if (newmark
!= ct
->mark
)
2159 ctnetlink_nfqueue_parse(const struct nlattr
*attr
, struct nf_conn
*ct
)
2161 struct nlattr
*cda
[CTA_MAX
+1];
2164 ret
= nla_parse_nested(cda
, CTA_MAX
, attr
, ct_nla_policy
);
2168 spin_lock_bh(&nf_conntrack_expect_lock
);
2169 ret
= ctnetlink_nfqueue_parse_ct((const struct nlattr
**)cda
, ct
);
2170 spin_unlock_bh(&nf_conntrack_expect_lock
);
2175 static int ctnetlink_nfqueue_exp_parse(const struct nlattr
* const *cda
,
2176 const struct nf_conn
*ct
,
2177 struct nf_conntrack_tuple
*tuple
,
2178 struct nf_conntrack_tuple
*mask
)
2182 err
= ctnetlink_parse_tuple(cda
, tuple
, CTA_EXPECT_TUPLE
,
2187 return ctnetlink_parse_tuple(cda
, mask
, CTA_EXPECT_MASK
,
2192 ctnetlink_nfqueue_attach_expect(const struct nlattr
*attr
, struct nf_conn
*ct
,
2193 u32 portid
, u32 report
)
2195 struct nlattr
*cda
[CTA_EXPECT_MAX
+1];
2196 struct nf_conntrack_tuple tuple
, mask
;
2197 struct nf_conntrack_helper
*helper
= NULL
;
2198 struct nf_conntrack_expect
*exp
;
2201 err
= nla_parse_nested(cda
, CTA_EXPECT_MAX
, attr
, exp_nla_policy
);
2205 err
= ctnetlink_nfqueue_exp_parse((const struct nlattr
* const *)cda
,
2210 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2211 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2213 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
2214 nf_ct_protonum(ct
));
2219 exp
= ctnetlink_alloc_expect((const struct nlattr
* const *)cda
, ct
,
2220 helper
, &tuple
, &mask
);
2222 return PTR_ERR(exp
);
2224 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2226 nf_ct_expect_put(exp
);
2233 static struct nfq_ct_hook ctnetlink_nfqueue_hook
= {
2234 .build_size
= ctnetlink_nfqueue_build_size
,
2235 .build
= ctnetlink_nfqueue_build
,
2236 .parse
= ctnetlink_nfqueue_parse
,
2237 .attach_expect
= ctnetlink_nfqueue_attach_expect
,
2238 .seq_adjust
= nf_ct_tcp_seqadj_set
,
2240 #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
2242 /***********************************************************************
2244 ***********************************************************************/
2247 ctnetlink_exp_dump_tuple(struct sk_buff
*skb
,
2248 const struct nf_conntrack_tuple
*tuple
,
2249 enum ctattr_expect type
)
2251 struct nlattr
*nest_parms
;
2253 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
2255 goto nla_put_failure
;
2256 if (ctnetlink_dump_tuples(skb
, tuple
) < 0)
2257 goto nla_put_failure
;
2258 nla_nest_end(skb
, nest_parms
);
2267 ctnetlink_exp_dump_mask(struct sk_buff
*skb
,
2268 const struct nf_conntrack_tuple
*tuple
,
2269 const struct nf_conntrack_tuple_mask
*mask
)
2272 struct nf_conntrack_l3proto
*l3proto
;
2273 struct nf_conntrack_l4proto
*l4proto
;
2274 struct nf_conntrack_tuple m
;
2275 struct nlattr
*nest_parms
;
2277 memset(&m
, 0xFF, sizeof(m
));
2278 memcpy(&m
.src
.u3
, &mask
->src
.u3
, sizeof(m
.src
.u3
));
2279 m
.src
.u
.all
= mask
->src
.u
.all
;
2280 m
.dst
.protonum
= tuple
->dst
.protonum
;
2282 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_MASK
| NLA_F_NESTED
);
2284 goto nla_put_failure
;
2287 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
2288 ret
= ctnetlink_dump_tuples_ip(skb
, &m
, l3proto
);
2290 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
,
2291 tuple
->dst
.protonum
);
2292 ret
= ctnetlink_dump_tuples_proto(skb
, &m
, l4proto
);
2296 if (unlikely(ret
< 0))
2297 goto nla_put_failure
;
2299 nla_nest_end(skb
, nest_parms
);
2307 static const union nf_inet_addr any_addr
;
2310 ctnetlink_exp_dump_expect(struct sk_buff
*skb
,
2311 const struct nf_conntrack_expect
*exp
)
2313 struct nf_conn
*master
= exp
->master
;
2314 long timeout
= ((long)exp
->timeout
.expires
- (long)jiffies
) / HZ
;
2315 struct nf_conn_help
*help
;
2316 #ifdef CONFIG_NF_NAT_NEEDED
2317 struct nlattr
*nest_parms
;
2318 struct nf_conntrack_tuple nat_tuple
= {};
2320 struct nf_ct_helper_expectfn
*expfn
;
2325 if (ctnetlink_exp_dump_tuple(skb
, &exp
->tuple
, CTA_EXPECT_TUPLE
) < 0)
2326 goto nla_put_failure
;
2327 if (ctnetlink_exp_dump_mask(skb
, &exp
->tuple
, &exp
->mask
) < 0)
2328 goto nla_put_failure
;
2329 if (ctnetlink_exp_dump_tuple(skb
,
2330 &master
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
2331 CTA_EXPECT_MASTER
) < 0)
2332 goto nla_put_failure
;
2334 #ifdef CONFIG_NF_NAT_NEEDED
2335 if (!nf_inet_addr_cmp(&exp
->saved_addr
, &any_addr
) ||
2336 exp
->saved_proto
.all
) {
2337 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_NAT
| NLA_F_NESTED
);
2339 goto nla_put_failure
;
2341 if (nla_put_be32(skb
, CTA_EXPECT_NAT_DIR
, htonl(exp
->dir
)))
2342 goto nla_put_failure
;
2344 nat_tuple
.src
.l3num
= nf_ct_l3num(master
);
2345 nat_tuple
.src
.u3
= exp
->saved_addr
;
2346 nat_tuple
.dst
.protonum
= nf_ct_protonum(master
);
2347 nat_tuple
.src
.u
= exp
->saved_proto
;
2349 if (ctnetlink_exp_dump_tuple(skb
, &nat_tuple
,
2350 CTA_EXPECT_NAT_TUPLE
) < 0)
2351 goto nla_put_failure
;
2352 nla_nest_end(skb
, nest_parms
);
2355 if (nla_put_be32(skb
, CTA_EXPECT_TIMEOUT
, htonl(timeout
)) ||
2356 nla_put_be32(skb
, CTA_EXPECT_ID
, htonl((unsigned long)exp
)) ||
2357 nla_put_be32(skb
, CTA_EXPECT_FLAGS
, htonl(exp
->flags
)) ||
2358 nla_put_be32(skb
, CTA_EXPECT_CLASS
, htonl(exp
->class)))
2359 goto nla_put_failure
;
2360 help
= nfct_help(master
);
2362 struct nf_conntrack_helper
*helper
;
2364 helper
= rcu_dereference(help
->helper
);
2366 nla_put_string(skb
, CTA_EXPECT_HELP_NAME
, helper
->name
))
2367 goto nla_put_failure
;
2369 expfn
= nf_ct_helper_expectfn_find_by_symbol(exp
->expectfn
);
2370 if (expfn
!= NULL
&&
2371 nla_put_string(skb
, CTA_EXPECT_FN
, expfn
->name
))
2372 goto nla_put_failure
;
2381 ctnetlink_exp_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
2382 int event
, const struct nf_conntrack_expect
*exp
)
2384 struct nlmsghdr
*nlh
;
2385 struct nfgenmsg
*nfmsg
;
2386 unsigned int flags
= portid
? NLM_F_MULTI
: 0;
2388 event
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2389 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
2393 nfmsg
= nlmsg_data(nlh
);
2394 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2395 nfmsg
->version
= NFNETLINK_V0
;
2398 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2399 goto nla_put_failure
;
2401 nlmsg_end(skb
, nlh
);
2406 nlmsg_cancel(skb
, nlh
);
2410 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2412 ctnetlink_expect_event(unsigned int events
, struct nf_exp_event
*item
)
2414 struct nf_conntrack_expect
*exp
= item
->exp
;
2415 struct net
*net
= nf_ct_exp_net(exp
);
2416 struct nlmsghdr
*nlh
;
2417 struct nfgenmsg
*nfmsg
;
2418 struct sk_buff
*skb
;
2419 unsigned int type
, group
;
2422 if (events
& (1 << IPEXP_DESTROY
)) {
2423 type
= IPCTNL_MSG_EXP_DELETE
;
2424 group
= NFNLGRP_CONNTRACK_EXP_DESTROY
;
2425 } else if (events
& (1 << IPEXP_NEW
)) {
2426 type
= IPCTNL_MSG_EXP_NEW
;
2427 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
2428 group
= NFNLGRP_CONNTRACK_EXP_NEW
;
2432 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
2435 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
2439 type
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2440 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
2444 nfmsg
= nlmsg_data(nlh
);
2445 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2446 nfmsg
->version
= NFNETLINK_V0
;
2450 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2451 goto nla_put_failure
;
2454 nlmsg_end(skb
, nlh
);
2455 nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
, GFP_ATOMIC
);
2460 nlmsg_cancel(skb
, nlh
);
2464 nfnetlink_set_err(net
, 0, 0, -ENOBUFS
);
2468 static int ctnetlink_exp_done(struct netlink_callback
*cb
)
2471 nf_ct_expect_put((struct nf_conntrack_expect
*)cb
->args
[1]);
2476 ctnetlink_exp_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2478 struct net
*net
= sock_net(skb
->sk
);
2479 struct nf_conntrack_expect
*exp
, *last
;
2480 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2481 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2484 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2485 for (; cb
->args
[0] < nf_ct_expect_hsize
; cb
->args
[0]++) {
2487 hlist_for_each_entry(exp
, &net
->ct
.expect_hash
[cb
->args
[0]],
2489 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2496 if (ctnetlink_exp_fill_info(skb
,
2497 NETLINK_CB(cb
->skb
).portid
,
2501 if (!atomic_inc_not_zero(&exp
->use
))
2503 cb
->args
[1] = (unsigned long)exp
;
2515 nf_ct_expect_put(last
);
2521 ctnetlink_exp_ct_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2523 struct nf_conntrack_expect
*exp
, *last
;
2524 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2525 struct nf_conn
*ct
= cb
->data
;
2526 struct nf_conn_help
*help
= nfct_help(ct
);
2527 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2533 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2535 hlist_for_each_entry(exp
, &help
->expectations
, lnode
) {
2536 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2543 if (ctnetlink_exp_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
2547 if (!atomic_inc_not_zero(&exp
->use
))
2549 cb
->args
[1] = (unsigned long)exp
;
2561 nf_ct_expect_put(last
);
2566 static int ctnetlink_dump_exp_ct(struct sock
*ctnl
, struct sk_buff
*skb
,
2567 const struct nlmsghdr
*nlh
,
2568 const struct nlattr
* const cda
[])
2571 struct net
*net
= sock_net(ctnl
);
2572 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2573 u_int8_t u3
= nfmsg
->nfgen_family
;
2574 struct nf_conntrack_tuple tuple
;
2575 struct nf_conntrack_tuple_hash
*h
;
2578 struct netlink_dump_control c
= {
2579 .dump
= ctnetlink_exp_ct_dump_table
,
2580 .done
= ctnetlink_exp_done
,
2583 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
2587 if (cda
[CTA_EXPECT_ZONE
]) {
2588 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2593 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
2597 ct
= nf_ct_tuplehash_to_ctrack(h
);
2600 err
= netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2607 ctnetlink_get_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2608 const struct nlmsghdr
*nlh
,
2609 const struct nlattr
* const cda
[])
2611 struct net
*net
= sock_net(ctnl
);
2612 struct nf_conntrack_tuple tuple
;
2613 struct nf_conntrack_expect
*exp
;
2614 struct sk_buff
*skb2
;
2615 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2616 u_int8_t u3
= nfmsg
->nfgen_family
;
2620 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
2621 if (cda
[CTA_EXPECT_MASTER
])
2622 return ctnetlink_dump_exp_ct(ctnl
, skb
, nlh
, cda
);
2624 struct netlink_dump_control c
= {
2625 .dump
= ctnetlink_exp_dump_table
,
2626 .done
= ctnetlink_exp_done
,
2628 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2632 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2636 if (cda
[CTA_EXPECT_TUPLE
])
2637 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2638 else if (cda
[CTA_EXPECT_MASTER
])
2639 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
2646 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2650 if (cda
[CTA_EXPECT_ID
]) {
2651 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2652 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2653 nf_ct_expect_put(exp
);
2659 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
2661 nf_ct_expect_put(exp
);
2666 err
= ctnetlink_exp_fill_info(skb2
, NETLINK_CB(skb
).portid
,
2667 nlh
->nlmsg_seq
, IPCTNL_MSG_EXP_NEW
, exp
);
2669 nf_ct_expect_put(exp
);
2673 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
2682 /* this avoids a loop in nfnetlink. */
2683 return err
== -EAGAIN
? -ENOBUFS
: err
;
2687 ctnetlink_del_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2688 const struct nlmsghdr
*nlh
,
2689 const struct nlattr
* const cda
[])
2691 struct net
*net
= sock_net(ctnl
);
2692 struct nf_conntrack_expect
*exp
;
2693 struct nf_conntrack_tuple tuple
;
2694 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2695 struct hlist_node
*next
;
2696 u_int8_t u3
= nfmsg
->nfgen_family
;
2701 if (cda
[CTA_EXPECT_TUPLE
]) {
2702 /* delete a single expect by tuple */
2703 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2707 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2711 /* bump usage count to 2 */
2712 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2716 if (cda
[CTA_EXPECT_ID
]) {
2717 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2718 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2719 nf_ct_expect_put(exp
);
2724 /* after list removal, usage count == 1 */
2725 spin_lock_bh(&nf_conntrack_expect_lock
);
2726 if (del_timer(&exp
->timeout
)) {
2727 nf_ct_unlink_expect_report(exp
, NETLINK_CB(skb
).portid
,
2729 nf_ct_expect_put(exp
);
2731 spin_unlock_bh(&nf_conntrack_expect_lock
);
2732 /* have to put what we 'get' above.
2733 * after this line usage count == 0 */
2734 nf_ct_expect_put(exp
);
2735 } else if (cda
[CTA_EXPECT_HELP_NAME
]) {
2736 char *name
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2737 struct nf_conn_help
*m_help
;
2739 /* delete all expectations for this helper */
2740 spin_lock_bh(&nf_conntrack_expect_lock
);
2741 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2742 hlist_for_each_entry_safe(exp
, next
,
2743 &net
->ct
.expect_hash
[i
],
2745 m_help
= nfct_help(exp
->master
);
2746 if (!strcmp(m_help
->helper
->name
, name
) &&
2747 del_timer(&exp
->timeout
)) {
2748 nf_ct_unlink_expect_report(exp
,
2749 NETLINK_CB(skb
).portid
,
2751 nf_ct_expect_put(exp
);
2755 spin_unlock_bh(&nf_conntrack_expect_lock
);
2757 /* This basically means we have to flush everything*/
2758 spin_lock_bh(&nf_conntrack_expect_lock
);
2759 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2760 hlist_for_each_entry_safe(exp
, next
,
2761 &net
->ct
.expect_hash
[i
],
2763 if (del_timer(&exp
->timeout
)) {
2764 nf_ct_unlink_expect_report(exp
,
2765 NETLINK_CB(skb
).portid
,
2767 nf_ct_expect_put(exp
);
2771 spin_unlock_bh(&nf_conntrack_expect_lock
);
2777 ctnetlink_change_expect(struct nf_conntrack_expect
*x
,
2778 const struct nlattr
* const cda
[])
2780 if (cda
[CTA_EXPECT_TIMEOUT
]) {
2781 if (!del_timer(&x
->timeout
))
2784 x
->timeout
.expires
= jiffies
+
2785 ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2786 add_timer(&x
->timeout
);
2791 static const struct nla_policy exp_nat_nla_policy
[CTA_EXPECT_NAT_MAX
+1] = {
2792 [CTA_EXPECT_NAT_DIR
] = { .type
= NLA_U32
},
2793 [CTA_EXPECT_NAT_TUPLE
] = { .type
= NLA_NESTED
},
2797 ctnetlink_parse_expect_nat(const struct nlattr
*attr
,
2798 struct nf_conntrack_expect
*exp
,
2801 #ifdef CONFIG_NF_NAT_NEEDED
2802 struct nlattr
*tb
[CTA_EXPECT_NAT_MAX
+1];
2803 struct nf_conntrack_tuple nat_tuple
= {};
2806 err
= nla_parse_nested(tb
, CTA_EXPECT_NAT_MAX
, attr
, exp_nat_nla_policy
);
2810 if (!tb
[CTA_EXPECT_NAT_DIR
] || !tb
[CTA_EXPECT_NAT_TUPLE
])
2813 err
= ctnetlink_parse_tuple((const struct nlattr
* const *)tb
,
2814 &nat_tuple
, CTA_EXPECT_NAT_TUPLE
, u3
);
2818 exp
->saved_addr
= nat_tuple
.src
.u3
;
2819 exp
->saved_proto
= nat_tuple
.src
.u
;
2820 exp
->dir
= ntohl(nla_get_be32(tb
[CTA_EXPECT_NAT_DIR
]));
2828 static struct nf_conntrack_expect
*
2829 ctnetlink_alloc_expect(const struct nlattr
* const cda
[], struct nf_conn
*ct
,
2830 struct nf_conntrack_helper
*helper
,
2831 struct nf_conntrack_tuple
*tuple
,
2832 struct nf_conntrack_tuple
*mask
)
2834 u_int32_t
class = 0;
2835 struct nf_conntrack_expect
*exp
;
2836 struct nf_conn_help
*help
;
2839 if (cda
[CTA_EXPECT_CLASS
] && helper
) {
2840 class = ntohl(nla_get_be32(cda
[CTA_EXPECT_CLASS
]));
2841 if (class > helper
->expect_class_max
)
2842 return ERR_PTR(-EINVAL
);
2844 exp
= nf_ct_expect_alloc(ct
);
2846 return ERR_PTR(-ENOMEM
);
2848 help
= nfct_help(ct
);
2850 if (!cda
[CTA_EXPECT_TIMEOUT
]) {
2854 exp
->timeout
.expires
=
2855 jiffies
+ ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2857 exp
->flags
= NF_CT_EXPECT_USERSPACE
;
2858 if (cda
[CTA_EXPECT_FLAGS
]) {
2860 ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2863 if (cda
[CTA_EXPECT_FLAGS
]) {
2864 exp
->flags
= ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2865 exp
->flags
&= ~NF_CT_EXPECT_USERSPACE
;
2869 if (cda
[CTA_EXPECT_FN
]) {
2870 const char *name
= nla_data(cda
[CTA_EXPECT_FN
]);
2871 struct nf_ct_helper_expectfn
*expfn
;
2873 expfn
= nf_ct_helper_expectfn_find_by_name(name
);
2874 if (expfn
== NULL
) {
2878 exp
->expectfn
= expfn
->expectfn
;
2880 exp
->expectfn
= NULL
;
2884 exp
->helper
= helper
;
2885 exp
->tuple
= *tuple
;
2886 exp
->mask
.src
.u3
= mask
->src
.u3
;
2887 exp
->mask
.src
.u
.all
= mask
->src
.u
.all
;
2889 if (cda
[CTA_EXPECT_NAT
]) {
2890 err
= ctnetlink_parse_expect_nat(cda
[CTA_EXPECT_NAT
],
2891 exp
, nf_ct_l3num(ct
));
2897 nf_ct_expect_put(exp
);
2898 return ERR_PTR(err
);
2902 ctnetlink_create_expect(struct net
*net
, u16 zone
,
2903 const struct nlattr
* const cda
[],
2904 u_int8_t u3
, u32 portid
, int report
)
2906 struct nf_conntrack_tuple tuple
, mask
, master_tuple
;
2907 struct nf_conntrack_tuple_hash
*h
= NULL
;
2908 struct nf_conntrack_helper
*helper
= NULL
;
2909 struct nf_conntrack_expect
*exp
;
2913 /* caller guarantees that those three CTA_EXPECT_* exist */
2914 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2917 err
= ctnetlink_parse_tuple(cda
, &mask
, CTA_EXPECT_MASK
, u3
);
2920 err
= ctnetlink_parse_tuple(cda
, &master_tuple
, CTA_EXPECT_MASTER
, u3
);
2924 /* Look for master conntrack of this expectation */
2925 h
= nf_conntrack_find_get(net
, zone
, &master_tuple
);
2928 ct
= nf_ct_tuplehash_to_ctrack(h
);
2930 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2931 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2933 helper
= __nf_conntrack_helper_find(helpname
, u3
,
2934 nf_ct_protonum(ct
));
2935 if (helper
== NULL
) {
2936 #ifdef CONFIG_MODULES
2937 if (request_module("nfct-helper-%s", helpname
) < 0) {
2941 helper
= __nf_conntrack_helper_find(helpname
, u3
,
2942 nf_ct_protonum(ct
));
2953 exp
= ctnetlink_alloc_expect(cda
, ct
, helper
, &tuple
, &mask
);
2959 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2965 nf_ct_expect_put(exp
);
2972 ctnetlink_new_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2973 const struct nlmsghdr
*nlh
,
2974 const struct nlattr
* const cda
[])
2976 struct net
*net
= sock_net(ctnl
);
2977 struct nf_conntrack_tuple tuple
;
2978 struct nf_conntrack_expect
*exp
;
2979 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2980 u_int8_t u3
= nfmsg
->nfgen_family
;
2984 if (!cda
[CTA_EXPECT_TUPLE
]
2985 || !cda
[CTA_EXPECT_MASK
]
2986 || !cda
[CTA_EXPECT_MASTER
])
2989 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2993 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2997 spin_lock_bh(&nf_conntrack_expect_lock
);
2998 exp
= __nf_ct_expect_find(net
, zone
, &tuple
);
3001 spin_unlock_bh(&nf_conntrack_expect_lock
);
3003 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
3004 err
= ctnetlink_create_expect(net
, zone
, cda
,
3006 NETLINK_CB(skb
).portid
,
3013 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
))
3014 err
= ctnetlink_change_expect(exp
, cda
);
3015 spin_unlock_bh(&nf_conntrack_expect_lock
);
3021 ctnetlink_exp_stat_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, int cpu
,
3022 const struct ip_conntrack_stat
*st
)
3024 struct nlmsghdr
*nlh
;
3025 struct nfgenmsg
*nfmsg
;
3026 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
3028 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_EXP_GET_STATS_CPU
);
3029 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
3033 nfmsg
= nlmsg_data(nlh
);
3034 nfmsg
->nfgen_family
= AF_UNSPEC
;
3035 nfmsg
->version
= NFNETLINK_V0
;
3036 nfmsg
->res_id
= htons(cpu
);
3038 if (nla_put_be32(skb
, CTA_STATS_EXP_NEW
, htonl(st
->expect_new
)) ||
3039 nla_put_be32(skb
, CTA_STATS_EXP_CREATE
, htonl(st
->expect_create
)) ||
3040 nla_put_be32(skb
, CTA_STATS_EXP_DELETE
, htonl(st
->expect_delete
)))
3041 goto nla_put_failure
;
3043 nlmsg_end(skb
, nlh
);
3048 nlmsg_cancel(skb
, nlh
);
3053 ctnetlink_exp_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3056 struct net
*net
= sock_net(skb
->sk
);
3058 if (cb
->args
[0] == nr_cpu_ids
)
3061 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
3062 const struct ip_conntrack_stat
*st
;
3064 if (!cpu_possible(cpu
))
3067 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
3068 if (ctnetlink_exp_stat_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
3079 ctnetlink_stat_exp_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
3080 const struct nlmsghdr
*nlh
,
3081 const struct nlattr
* const cda
[])
3083 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
3084 struct netlink_dump_control c
= {
3085 .dump
= ctnetlink_exp_stat_cpu_dump
,
3087 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
3093 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3094 static struct nf_ct_event_notifier ctnl_notifier
= {
3095 .fcn
= ctnetlink_conntrack_event
,
3098 static struct nf_exp_event_notifier ctnl_notifier_exp
= {
3099 .fcn
= ctnetlink_expect_event
,
3103 static const struct nfnl_callback ctnl_cb
[IPCTNL_MSG_MAX
] = {
3104 [IPCTNL_MSG_CT_NEW
] = { .call
= ctnetlink_new_conntrack
,
3105 .attr_count
= CTA_MAX
,
3106 .policy
= ct_nla_policy
},
3107 [IPCTNL_MSG_CT_GET
] = { .call
= ctnetlink_get_conntrack
,
3108 .attr_count
= CTA_MAX
,
3109 .policy
= ct_nla_policy
},
3110 [IPCTNL_MSG_CT_DELETE
] = { .call
= ctnetlink_del_conntrack
,
3111 .attr_count
= CTA_MAX
,
3112 .policy
= ct_nla_policy
},
3113 [IPCTNL_MSG_CT_GET_CTRZERO
] = { .call
= ctnetlink_get_conntrack
,
3114 .attr_count
= CTA_MAX
,
3115 .policy
= ct_nla_policy
},
3116 [IPCTNL_MSG_CT_GET_STATS_CPU
] = { .call
= ctnetlink_stat_ct_cpu
},
3117 [IPCTNL_MSG_CT_GET_STATS
] = { .call
= ctnetlink_stat_ct
},
3118 [IPCTNL_MSG_CT_GET_DYING
] = { .call
= ctnetlink_get_ct_dying
},
3119 [IPCTNL_MSG_CT_GET_UNCONFIRMED
] = { .call
= ctnetlink_get_ct_unconfirmed
},
3122 static const struct nfnl_callback ctnl_exp_cb
[IPCTNL_MSG_EXP_MAX
] = {
3123 [IPCTNL_MSG_EXP_GET
] = { .call
= ctnetlink_get_expect
,
3124 .attr_count
= CTA_EXPECT_MAX
,
3125 .policy
= exp_nla_policy
},
3126 [IPCTNL_MSG_EXP_NEW
] = { .call
= ctnetlink_new_expect
,
3127 .attr_count
= CTA_EXPECT_MAX
,
3128 .policy
= exp_nla_policy
},
3129 [IPCTNL_MSG_EXP_DELETE
] = { .call
= ctnetlink_del_expect
,
3130 .attr_count
= CTA_EXPECT_MAX
,
3131 .policy
= exp_nla_policy
},
3132 [IPCTNL_MSG_EXP_GET_STATS_CPU
] = { .call
= ctnetlink_stat_exp_cpu
},
3135 static const struct nfnetlink_subsystem ctnl_subsys
= {
3136 .name
= "conntrack",
3137 .subsys_id
= NFNL_SUBSYS_CTNETLINK
,
3138 .cb_count
= IPCTNL_MSG_MAX
,
3142 static const struct nfnetlink_subsystem ctnl_exp_subsys
= {
3143 .name
= "conntrack_expect",
3144 .subsys_id
= NFNL_SUBSYS_CTNETLINK_EXP
,
3145 .cb_count
= IPCTNL_MSG_EXP_MAX
,
3149 MODULE_ALIAS("ip_conntrack_netlink");
3150 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK
);
3151 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP
);
3153 static int __net_init
ctnetlink_net_init(struct net
*net
)
3155 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3158 ret
= nf_conntrack_register_notifier(net
, &ctnl_notifier
);
3160 pr_err("ctnetlink_init: cannot register notifier.\n");
3164 ret
= nf_ct_expect_register_notifier(net
, &ctnl_notifier_exp
);
3166 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3167 goto err_unreg_notifier
;
3172 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3174 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3180 static void ctnetlink_net_exit(struct net
*net
)
3182 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3183 nf_ct_expect_unregister_notifier(net
, &ctnl_notifier_exp
);
3184 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3188 static void __net_exit
ctnetlink_net_exit_batch(struct list_head
*net_exit_list
)
3192 list_for_each_entry(net
, net_exit_list
, exit_list
)
3193 ctnetlink_net_exit(net
);
3196 static struct pernet_operations ctnetlink_net_ops
= {
3197 .init
= ctnetlink_net_init
,
3198 .exit_batch
= ctnetlink_net_exit_batch
,
3201 static int __init
ctnetlink_init(void)
3205 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version
);
3206 ret
= nfnetlink_subsys_register(&ctnl_subsys
);
3208 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
3212 ret
= nfnetlink_subsys_register(&ctnl_exp_subsys
);
3214 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
3215 goto err_unreg_subsys
;
3218 ret
= register_pernet_subsys(&ctnetlink_net_ops
);
3220 pr_err("ctnetlink_init: cannot register pernet operations\n");
3221 goto err_unreg_exp_subsys
;
3223 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
3224 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3225 RCU_INIT_POINTER(nfq_ct_hook
, &ctnetlink_nfqueue_hook
);
3229 err_unreg_exp_subsys
:
3230 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3232 nfnetlink_subsys_unregister(&ctnl_subsys
);
3237 static void __exit
ctnetlink_exit(void)
3239 pr_info("ctnetlink: unregistering from nfnetlink.\n");
3241 unregister_pernet_subsys(&ctnetlink_net_ops
);
3242 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3243 nfnetlink_subsys_unregister(&ctnl_subsys
);
3244 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
3245 RCU_INIT_POINTER(nfq_ct_hook
, NULL
);
3249 module_init(ctnetlink_init
);
3250 module_exit(ctnetlink_exit
);