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]);
752 struct ctnetlink_filter
{
759 static struct ctnetlink_filter
*
760 ctnetlink_alloc_filter(const struct nlattr
* const cda
[])
762 #ifdef CONFIG_NF_CONNTRACK_MARK
763 struct ctnetlink_filter
*filter
;
765 filter
= kzalloc(sizeof(*filter
), GFP_KERNEL
);
767 return ERR_PTR(-ENOMEM
);
769 filter
->mark
.val
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
770 filter
->mark
.mask
= ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
774 return ERR_PTR(-EOPNOTSUPP
);
778 static int ctnetlink_filter_match(struct nf_conn
*ct
, void *data
)
780 struct ctnetlink_filter
*filter
= data
;
785 #ifdef CONFIG_NF_CONNTRACK_MARK
786 if ((ct
->mark
& filter
->mark
.mask
) == filter
->mark
.val
)
794 ctnetlink_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
796 struct net
*net
= sock_net(skb
->sk
);
797 struct nf_conn
*ct
, *last
;
798 struct nf_conntrack_tuple_hash
*h
;
799 struct hlist_nulls_node
*n
;
800 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
801 u_int8_t l3proto
= nfmsg
->nfgen_family
;
805 last
= (struct nf_conn
*)cb
->args
[1];
808 for (; cb
->args
[0] < net
->ct
.htable_size
; cb
->args
[0]++) {
810 lockp
= &nf_conntrack_locks
[cb
->args
[0] % CONNTRACK_LOCKS
];
812 if (cb
->args
[0] >= net
->ct
.htable_size
) {
816 hlist_nulls_for_each_entry(h
, n
, &net
->ct
.hash
[cb
->args
[0]],
818 if (NF_CT_DIRECTION(h
) != IP_CT_DIR_ORIGINAL
)
820 ct
= nf_ct_tuplehash_to_ctrack(h
);
821 /* Dump entries of a given L3 protocol number.
822 * If it is not specified, ie. l3proto == 0,
823 * then dump everything. */
824 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
831 if (!ctnetlink_filter_match(ct
, cb
->data
))
836 ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
838 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
842 nf_conntrack_get(&ct
->ct_general
);
843 cb
->args
[1] = (unsigned long)ct
;
863 ctnetlink_parse_tuple_ip(struct nlattr
*attr
, struct nf_conntrack_tuple
*tuple
)
865 struct nlattr
*tb
[CTA_IP_MAX
+1];
866 struct nf_conntrack_l3proto
*l3proto
;
869 ret
= nla_parse_nested(tb
, CTA_IP_MAX
, attr
, NULL
);
874 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
876 if (likely(l3proto
->nlattr_to_tuple
)) {
877 ret
= nla_validate_nested(attr
, CTA_IP_MAX
,
878 l3proto
->nla_policy
);
880 ret
= l3proto
->nlattr_to_tuple(tb
, tuple
);
888 static const struct nla_policy proto_nla_policy
[CTA_PROTO_MAX
+1] = {
889 [CTA_PROTO_NUM
] = { .type
= NLA_U8
},
893 ctnetlink_parse_tuple_proto(struct nlattr
*attr
,
894 struct nf_conntrack_tuple
*tuple
)
896 struct nlattr
*tb
[CTA_PROTO_MAX
+1];
897 struct nf_conntrack_l4proto
*l4proto
;
900 ret
= nla_parse_nested(tb
, CTA_PROTO_MAX
, attr
, proto_nla_policy
);
904 if (!tb
[CTA_PROTO_NUM
])
906 tuple
->dst
.protonum
= nla_get_u8(tb
[CTA_PROTO_NUM
]);
909 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
, tuple
->dst
.protonum
);
911 if (likely(l4proto
->nlattr_to_tuple
)) {
912 ret
= nla_validate_nested(attr
, CTA_PROTO_MAX
,
913 l4proto
->nla_policy
);
915 ret
= l4proto
->nlattr_to_tuple(tb
, tuple
);
923 static const struct nla_policy tuple_nla_policy
[CTA_TUPLE_MAX
+1] = {
924 [CTA_TUPLE_IP
] = { .type
= NLA_NESTED
},
925 [CTA_TUPLE_PROTO
] = { .type
= NLA_NESTED
},
929 ctnetlink_parse_tuple(const struct nlattr
* const cda
[],
930 struct nf_conntrack_tuple
*tuple
,
931 enum ctattr_type type
, u_int8_t l3num
)
933 struct nlattr
*tb
[CTA_TUPLE_MAX
+1];
936 memset(tuple
, 0, sizeof(*tuple
));
938 err
= nla_parse_nested(tb
, CTA_TUPLE_MAX
, cda
[type
], tuple_nla_policy
);
942 if (!tb
[CTA_TUPLE_IP
])
945 tuple
->src
.l3num
= l3num
;
947 err
= ctnetlink_parse_tuple_ip(tb
[CTA_TUPLE_IP
], tuple
);
951 if (!tb
[CTA_TUPLE_PROTO
])
954 err
= ctnetlink_parse_tuple_proto(tb
[CTA_TUPLE_PROTO
], tuple
);
958 /* orig and expect tuples get DIR_ORIGINAL */
959 if (type
== CTA_TUPLE_REPLY
)
960 tuple
->dst
.dir
= IP_CT_DIR_REPLY
;
962 tuple
->dst
.dir
= IP_CT_DIR_ORIGINAL
;
968 ctnetlink_parse_zone(const struct nlattr
*attr
, u16
*zone
)
971 #ifdef CONFIG_NF_CONNTRACK_ZONES
972 *zone
= ntohs(nla_get_be16(attr
));
982 static const struct nla_policy help_nla_policy
[CTA_HELP_MAX
+1] = {
983 [CTA_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
984 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
988 ctnetlink_parse_help(const struct nlattr
*attr
, char **helper_name
,
989 struct nlattr
**helpinfo
)
992 struct nlattr
*tb
[CTA_HELP_MAX
+1];
994 err
= nla_parse_nested(tb
, CTA_HELP_MAX
, attr
, help_nla_policy
);
998 if (!tb
[CTA_HELP_NAME
])
1001 *helper_name
= nla_data(tb
[CTA_HELP_NAME
]);
1003 if (tb
[CTA_HELP_INFO
])
1004 *helpinfo
= tb
[CTA_HELP_INFO
];
1009 static const struct nla_policy ct_nla_policy
[CTA_MAX
+1] = {
1010 [CTA_TUPLE_ORIG
] = { .type
= NLA_NESTED
},
1011 [CTA_TUPLE_REPLY
] = { .type
= NLA_NESTED
},
1012 [CTA_STATUS
] = { .type
= NLA_U32
},
1013 [CTA_PROTOINFO
] = { .type
= NLA_NESTED
},
1014 [CTA_HELP
] = { .type
= NLA_NESTED
},
1015 [CTA_NAT_SRC
] = { .type
= NLA_NESTED
},
1016 [CTA_TIMEOUT
] = { .type
= NLA_U32
},
1017 [CTA_MARK
] = { .type
= NLA_U32
},
1018 [CTA_ID
] = { .type
= NLA_U32
},
1019 [CTA_NAT_DST
] = { .type
= NLA_NESTED
},
1020 [CTA_TUPLE_MASTER
] = { .type
= NLA_NESTED
},
1021 [CTA_NAT_SEQ_ADJ_ORIG
] = { .type
= NLA_NESTED
},
1022 [CTA_NAT_SEQ_ADJ_REPLY
] = { .type
= NLA_NESTED
},
1023 [CTA_ZONE
] = { .type
= NLA_U16
},
1024 [CTA_MARK_MASK
] = { .type
= NLA_U32
},
1025 [CTA_LABELS
] = { .type
= NLA_BINARY
,
1026 .len
= NF_CT_LABELS_MAX_SIZE
},
1027 [CTA_LABELS_MASK
] = { .type
= NLA_BINARY
,
1028 .len
= NF_CT_LABELS_MAX_SIZE
},
1031 static int ctnetlink_flush_conntrack(struct net
*net
,
1032 const struct nlattr
* const cda
[],
1033 u32 portid
, int report
)
1035 struct ctnetlink_filter
*filter
= NULL
;
1037 if (cda
[CTA_MARK
] && cda
[CTA_MARK_MASK
]) {
1038 filter
= ctnetlink_alloc_filter(cda
);
1040 return PTR_ERR(filter
);
1043 nf_ct_iterate_cleanup(net
, ctnetlink_filter_match
, filter
,
1051 ctnetlink_del_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1052 const struct nlmsghdr
*nlh
,
1053 const struct nlattr
* const cda
[])
1055 struct net
*net
= sock_net(ctnl
);
1056 struct nf_conntrack_tuple_hash
*h
;
1057 struct nf_conntrack_tuple tuple
;
1059 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1060 u_int8_t u3
= nfmsg
->nfgen_family
;
1064 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1068 if (cda
[CTA_TUPLE_ORIG
])
1069 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
1070 else if (cda
[CTA_TUPLE_REPLY
])
1071 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
1073 return ctnetlink_flush_conntrack(net
, cda
,
1074 NETLINK_CB(skb
).portid
,
1081 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
1085 ct
= nf_ct_tuplehash_to_ctrack(h
);
1088 u_int32_t id
= ntohl(nla_get_be32(cda
[CTA_ID
]));
1089 if (id
!= (u32
)(unsigned long)ct
) {
1095 if (del_timer(&ct
->timeout
))
1096 nf_ct_delete(ct
, NETLINK_CB(skb
).portid
, nlmsg_report(nlh
));
1104 ctnetlink_get_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1105 const struct nlmsghdr
*nlh
,
1106 const struct nlattr
* const cda
[])
1108 struct net
*net
= sock_net(ctnl
);
1109 struct nf_conntrack_tuple_hash
*h
;
1110 struct nf_conntrack_tuple tuple
;
1112 struct sk_buff
*skb2
= NULL
;
1113 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1114 u_int8_t u3
= nfmsg
->nfgen_family
;
1118 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1119 struct netlink_dump_control c
= {
1120 .dump
= ctnetlink_dump_table
,
1121 .done
= ctnetlink_done
,
1124 if (cda
[CTA_MARK
] && cda
[CTA_MARK_MASK
]) {
1125 struct ctnetlink_filter
*filter
;
1127 filter
= ctnetlink_alloc_filter(cda
);
1129 return PTR_ERR(filter
);
1133 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1136 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1140 if (cda
[CTA_TUPLE_ORIG
])
1141 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
1142 else if (cda
[CTA_TUPLE_REPLY
])
1143 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
1150 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
1154 ct
= nf_ct_tuplehash_to_ctrack(h
);
1157 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1164 err
= ctnetlink_fill_info(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
,
1165 NFNL_MSG_TYPE(nlh
->nlmsg_type
), ct
);
1171 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1180 /* this avoids a loop in nfnetlink. */
1181 return err
== -EAGAIN
? -ENOBUFS
: err
;
1184 static int ctnetlink_done_list(struct netlink_callback
*cb
)
1187 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
1192 ctnetlink_dump_list(struct sk_buff
*skb
, struct netlink_callback
*cb
, bool dying
)
1194 struct nf_conn
*ct
, *last
;
1195 struct nf_conntrack_tuple_hash
*h
;
1196 struct hlist_nulls_node
*n
;
1197 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
1198 u_int8_t l3proto
= nfmsg
->nfgen_family
;
1201 struct hlist_nulls_head
*list
;
1202 struct net
*net
= sock_net(skb
->sk
);
1207 last
= (struct nf_conn
*)cb
->args
[1];
1209 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
1210 struct ct_pcpu
*pcpu
;
1212 if (!cpu_possible(cpu
))
1215 pcpu
= per_cpu_ptr(net
->ct
.pcpu_lists
, cpu
);
1216 spin_lock_bh(&pcpu
->lock
);
1217 list
= dying
? &pcpu
->dying
: &pcpu
->unconfirmed
;
1219 hlist_nulls_for_each_entry(h
, n
, list
, hnnode
) {
1220 ct
= nf_ct_tuplehash_to_ctrack(h
);
1221 if (l3proto
&& nf_ct_l3num(ct
) != l3proto
)
1229 res
= ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
1231 NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
),
1235 if (!atomic_inc_not_zero(&ct
->ct_general
.use
))
1238 cb
->args
[1] = (unsigned long)ct
;
1239 spin_unlock_bh(&pcpu
->lock
);
1247 spin_unlock_bh(&pcpu
->lock
);
1258 ctnetlink_dump_dying(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1260 return ctnetlink_dump_list(skb
, cb
, true);
1264 ctnetlink_get_ct_dying(struct sock
*ctnl
, struct sk_buff
*skb
,
1265 const struct nlmsghdr
*nlh
,
1266 const struct nlattr
* const cda
[])
1268 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1269 struct netlink_dump_control c
= {
1270 .dump
= ctnetlink_dump_dying
,
1271 .done
= ctnetlink_done_list
,
1273 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1280 ctnetlink_dump_unconfirmed(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1282 return ctnetlink_dump_list(skb
, cb
, false);
1286 ctnetlink_get_ct_unconfirmed(struct sock
*ctnl
, struct sk_buff
*skb
,
1287 const struct nlmsghdr
*nlh
,
1288 const struct nlattr
* const cda
[])
1290 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1291 struct netlink_dump_control c
= {
1292 .dump
= ctnetlink_dump_unconfirmed
,
1293 .done
= ctnetlink_done_list
,
1295 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1301 #ifdef CONFIG_NF_NAT_NEEDED
1303 ctnetlink_parse_nat_setup(struct nf_conn
*ct
,
1304 enum nf_nat_manip_type manip
,
1305 const struct nlattr
*attr
)
1307 typeof(nfnetlink_parse_nat_setup_hook
) parse_nat_setup
;
1310 parse_nat_setup
= rcu_dereference(nfnetlink_parse_nat_setup_hook
);
1311 if (!parse_nat_setup
) {
1312 #ifdef CONFIG_MODULES
1314 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1315 if (request_module("nf-nat") < 0) {
1316 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1320 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1322 if (nfnetlink_parse_nat_setup_hook
)
1328 err
= parse_nat_setup(ct
, manip
, attr
);
1329 if (err
== -EAGAIN
) {
1330 #ifdef CONFIG_MODULES
1332 nfnl_unlock(NFNL_SUBSYS_CTNETLINK
);
1333 if (request_module("nf-nat-%u", nf_ct_l3num(ct
)) < 0) {
1334 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1338 nfnl_lock(NFNL_SUBSYS_CTNETLINK
);
1349 ctnetlink_change_status(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1352 unsigned int status
= ntohl(nla_get_be32(cda
[CTA_STATUS
]));
1353 d
= ct
->status
^ status
;
1355 if (d
& (IPS_EXPECTED
|IPS_CONFIRMED
|IPS_DYING
))
1359 if (d
& IPS_SEEN_REPLY
&& !(status
& IPS_SEEN_REPLY
))
1360 /* SEEN_REPLY bit can only be set */
1363 if (d
& IPS_ASSURED
&& !(status
& IPS_ASSURED
))
1364 /* ASSURED bit can only be set */
1367 /* Be careful here, modifying NAT bits can screw up things,
1368 * so don't let users modify them directly if they don't pass
1370 ct
->status
|= status
& ~(IPS_NAT_DONE_MASK
| IPS_NAT_MASK
);
1375 ctnetlink_setup_nat(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1377 #ifdef CONFIG_NF_NAT_NEEDED
1380 if (!cda
[CTA_NAT_DST
] && !cda
[CTA_NAT_SRC
])
1383 ret
= ctnetlink_parse_nat_setup(ct
, NF_NAT_MANIP_DST
,
1388 ret
= ctnetlink_parse_nat_setup(ct
, NF_NAT_MANIP_SRC
,
1392 if (!cda
[CTA_NAT_DST
] && !cda
[CTA_NAT_SRC
])
1399 ctnetlink_change_helper(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1401 struct nf_conntrack_helper
*helper
;
1402 struct nf_conn_help
*help
= nfct_help(ct
);
1403 char *helpname
= NULL
;
1404 struct nlattr
*helpinfo
= NULL
;
1407 /* don't change helper of sibling connections */
1411 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1415 if (!strcmp(helpname
, "")) {
1416 if (help
&& help
->helper
) {
1417 /* we had a helper before ... */
1418 nf_ct_remove_expectations(ct
);
1419 RCU_INIT_POINTER(help
->helper
, NULL
);
1425 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1426 nf_ct_protonum(ct
));
1427 if (helper
== NULL
) {
1428 #ifdef CONFIG_MODULES
1429 spin_unlock_bh(&nf_conntrack_expect_lock
);
1431 if (request_module("nfct-helper-%s", helpname
) < 0) {
1432 spin_lock_bh(&nf_conntrack_expect_lock
);
1436 spin_lock_bh(&nf_conntrack_expect_lock
);
1437 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1438 nf_ct_protonum(ct
));
1446 if (help
->helper
== helper
) {
1447 /* update private helper data if allowed. */
1448 if (helper
->from_nlattr
)
1449 helper
->from_nlattr(helpinfo
, ct
);
1455 /* we cannot set a helper for an existing conntrack */
1460 ctnetlink_change_timeout(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1462 u_int32_t timeout
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1464 if (!del_timer(&ct
->timeout
))
1467 ct
->timeout
.expires
= jiffies
+ timeout
* HZ
;
1468 add_timer(&ct
->timeout
);
1473 static const struct nla_policy protoinfo_policy
[CTA_PROTOINFO_MAX
+1] = {
1474 [CTA_PROTOINFO_TCP
] = { .type
= NLA_NESTED
},
1475 [CTA_PROTOINFO_DCCP
] = { .type
= NLA_NESTED
},
1476 [CTA_PROTOINFO_SCTP
] = { .type
= NLA_NESTED
},
1480 ctnetlink_change_protoinfo(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1482 const struct nlattr
*attr
= cda
[CTA_PROTOINFO
];
1483 struct nlattr
*tb
[CTA_PROTOINFO_MAX
+1];
1484 struct nf_conntrack_l4proto
*l4proto
;
1487 err
= nla_parse_nested(tb
, CTA_PROTOINFO_MAX
, attr
, protoinfo_policy
);
1492 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
1493 if (l4proto
->from_nlattr
)
1494 err
= l4proto
->from_nlattr(tb
, ct
);
1500 static const struct nla_policy seqadj_policy
[CTA_SEQADJ_MAX
+1] = {
1501 [CTA_SEQADJ_CORRECTION_POS
] = { .type
= NLA_U32
},
1502 [CTA_SEQADJ_OFFSET_BEFORE
] = { .type
= NLA_U32
},
1503 [CTA_SEQADJ_OFFSET_AFTER
] = { .type
= NLA_U32
},
1507 change_seq_adj(struct nf_ct_seqadj
*seq
, const struct nlattr
* const attr
)
1510 struct nlattr
*cda
[CTA_SEQADJ_MAX
+1];
1512 err
= nla_parse_nested(cda
, CTA_SEQADJ_MAX
, attr
, seqadj_policy
);
1516 if (!cda
[CTA_SEQADJ_CORRECTION_POS
])
1519 seq
->correction_pos
=
1520 ntohl(nla_get_be32(cda
[CTA_SEQADJ_CORRECTION_POS
]));
1522 if (!cda
[CTA_SEQADJ_OFFSET_BEFORE
])
1525 seq
->offset_before
=
1526 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_BEFORE
]));
1528 if (!cda
[CTA_SEQADJ_OFFSET_AFTER
])
1532 ntohl(nla_get_be32(cda
[CTA_SEQADJ_OFFSET_AFTER
]));
1538 ctnetlink_change_seq_adj(struct nf_conn
*ct
,
1539 const struct nlattr
* const cda
[])
1541 struct nf_conn_seqadj
*seqadj
= nfct_seqadj(ct
);
1547 if (cda
[CTA_SEQ_ADJ_ORIG
]) {
1548 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_ORIGINAL
],
1549 cda
[CTA_SEQ_ADJ_ORIG
]);
1553 ct
->status
|= IPS_SEQ_ADJUST
;
1556 if (cda
[CTA_SEQ_ADJ_REPLY
]) {
1557 ret
= change_seq_adj(&seqadj
->seq
[IP_CT_DIR_REPLY
],
1558 cda
[CTA_SEQ_ADJ_REPLY
]);
1562 ct
->status
|= IPS_SEQ_ADJUST
;
1569 ctnetlink_attach_labels(struct nf_conn
*ct
, const struct nlattr
* const cda
[])
1571 #ifdef CONFIG_NF_CONNTRACK_LABELS
1572 size_t len
= nla_len(cda
[CTA_LABELS
]);
1573 const void *mask
= cda
[CTA_LABELS_MASK
];
1575 if (len
& (sizeof(u32
)-1)) /* must be multiple of u32 */
1579 if (nla_len(cda
[CTA_LABELS_MASK
]) == 0 ||
1580 nla_len(cda
[CTA_LABELS_MASK
]) != len
)
1582 mask
= nla_data(cda
[CTA_LABELS_MASK
]);
1587 return nf_connlabels_replace(ct
, nla_data(cda
[CTA_LABELS
]), mask
, len
);
1594 ctnetlink_change_conntrack(struct nf_conn
*ct
,
1595 const struct nlattr
* const cda
[])
1599 /* only allow NAT changes and master assignation for new conntracks */
1600 if (cda
[CTA_NAT_SRC
] || cda
[CTA_NAT_DST
] || cda
[CTA_TUPLE_MASTER
])
1603 if (cda
[CTA_HELP
]) {
1604 err
= ctnetlink_change_helper(ct
, cda
);
1609 if (cda
[CTA_TIMEOUT
]) {
1610 err
= ctnetlink_change_timeout(ct
, cda
);
1615 if (cda
[CTA_STATUS
]) {
1616 err
= ctnetlink_change_status(ct
, cda
);
1621 if (cda
[CTA_PROTOINFO
]) {
1622 err
= ctnetlink_change_protoinfo(ct
, cda
);
1627 #if defined(CONFIG_NF_CONNTRACK_MARK)
1629 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1632 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1633 err
= ctnetlink_change_seq_adj(ct
, cda
);
1638 if (cda
[CTA_LABELS
]) {
1639 err
= ctnetlink_attach_labels(ct
, cda
);
1647 static struct nf_conn
*
1648 ctnetlink_create_conntrack(struct net
*net
, u16 zone
,
1649 const struct nlattr
* const cda
[],
1650 struct nf_conntrack_tuple
*otuple
,
1651 struct nf_conntrack_tuple
*rtuple
,
1656 struct nf_conntrack_helper
*helper
;
1657 struct nf_conn_tstamp
*tstamp
;
1659 ct
= nf_conntrack_alloc(net
, zone
, otuple
, rtuple
, GFP_ATOMIC
);
1661 return ERR_PTR(-ENOMEM
);
1663 if (!cda
[CTA_TIMEOUT
])
1665 ct
->timeout
.expires
= ntohl(nla_get_be32(cda
[CTA_TIMEOUT
]));
1667 ct
->timeout
.expires
= jiffies
+ ct
->timeout
.expires
* HZ
;
1670 if (cda
[CTA_HELP
]) {
1671 char *helpname
= NULL
;
1672 struct nlattr
*helpinfo
= NULL
;
1674 err
= ctnetlink_parse_help(cda
[CTA_HELP
], &helpname
, &helpinfo
);
1678 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
1679 nf_ct_protonum(ct
));
1680 if (helper
== NULL
) {
1682 #ifdef CONFIG_MODULES
1683 if (request_module("nfct-helper-%s", helpname
) < 0) {
1689 helper
= __nf_conntrack_helper_find(helpname
,
1691 nf_ct_protonum(ct
));
1701 struct nf_conn_help
*help
;
1703 help
= nf_ct_helper_ext_add(ct
, helper
, GFP_ATOMIC
);
1708 /* set private helper data if allowed. */
1709 if (helper
->from_nlattr
)
1710 helper
->from_nlattr(helpinfo
, ct
);
1712 /* not in hash table yet so not strictly necessary */
1713 RCU_INIT_POINTER(help
->helper
, helper
);
1716 /* try an implicit helper assignation */
1717 err
= __nf_ct_try_assign_helper(ct
, NULL
, GFP_ATOMIC
);
1722 err
= ctnetlink_setup_nat(ct
, cda
);
1726 nf_ct_acct_ext_add(ct
, GFP_ATOMIC
);
1727 nf_ct_tstamp_ext_add(ct
, GFP_ATOMIC
);
1728 nf_ct_ecache_ext_add(ct
, 0, 0, GFP_ATOMIC
);
1729 nf_ct_labels_ext_add(ct
);
1731 /* we must add conntrack extensions before confirmation. */
1732 ct
->status
|= IPS_CONFIRMED
;
1734 if (cda
[CTA_STATUS
]) {
1735 err
= ctnetlink_change_status(ct
, cda
);
1740 if (cda
[CTA_SEQ_ADJ_ORIG
] || cda
[CTA_SEQ_ADJ_REPLY
]) {
1741 err
= ctnetlink_change_seq_adj(ct
, cda
);
1746 memset(&ct
->proto
, 0, sizeof(ct
->proto
));
1747 if (cda
[CTA_PROTOINFO
]) {
1748 err
= ctnetlink_change_protoinfo(ct
, cda
);
1753 #if defined(CONFIG_NF_CONNTRACK_MARK)
1755 ct
->mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
1758 /* setup master conntrack: this is a confirmed expectation */
1759 if (cda
[CTA_TUPLE_MASTER
]) {
1760 struct nf_conntrack_tuple master
;
1761 struct nf_conntrack_tuple_hash
*master_h
;
1762 struct nf_conn
*master_ct
;
1764 err
= ctnetlink_parse_tuple(cda
, &master
, CTA_TUPLE_MASTER
, u3
);
1768 master_h
= nf_conntrack_find_get(net
, zone
, &master
);
1769 if (master_h
== NULL
) {
1773 master_ct
= nf_ct_tuplehash_to_ctrack(master_h
);
1774 __set_bit(IPS_EXPECTED_BIT
, &ct
->status
);
1775 ct
->master
= master_ct
;
1777 tstamp
= nf_conn_tstamp_find(ct
);
1779 tstamp
->start
= ktime_get_real_ns();
1781 err
= nf_conntrack_hash_check_insert(ct
);
1792 nf_conntrack_free(ct
);
1793 return ERR_PTR(err
);
1797 ctnetlink_new_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1798 const struct nlmsghdr
*nlh
,
1799 const struct nlattr
* const cda
[])
1801 struct net
*net
= sock_net(ctnl
);
1802 struct nf_conntrack_tuple otuple
, rtuple
;
1803 struct nf_conntrack_tuple_hash
*h
= NULL
;
1804 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1806 u_int8_t u3
= nfmsg
->nfgen_family
;
1810 err
= ctnetlink_parse_zone(cda
[CTA_ZONE
], &zone
);
1814 if (cda
[CTA_TUPLE_ORIG
]) {
1815 err
= ctnetlink_parse_tuple(cda
, &otuple
, CTA_TUPLE_ORIG
, u3
);
1820 if (cda
[CTA_TUPLE_REPLY
]) {
1821 err
= ctnetlink_parse_tuple(cda
, &rtuple
, CTA_TUPLE_REPLY
, u3
);
1826 if (cda
[CTA_TUPLE_ORIG
])
1827 h
= nf_conntrack_find_get(net
, zone
, &otuple
);
1828 else if (cda
[CTA_TUPLE_REPLY
])
1829 h
= nf_conntrack_find_get(net
, zone
, &rtuple
);
1833 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
1834 enum ip_conntrack_events events
;
1836 if (!cda
[CTA_TUPLE_ORIG
] || !cda
[CTA_TUPLE_REPLY
])
1839 ct
= ctnetlink_create_conntrack(net
, zone
, cda
, &otuple
,
1845 if (test_bit(IPS_EXPECTED_BIT
, &ct
->status
))
1846 events
= IPCT_RELATED
;
1850 if (cda
[CTA_LABELS
] &&
1851 ctnetlink_attach_labels(ct
, cda
) == 0)
1852 events
|= (1 << IPCT_LABEL
);
1854 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1855 (1 << IPCT_ASSURED
) |
1856 (1 << IPCT_HELPER
) |
1857 (1 << IPCT_PROTOINFO
) |
1858 (1 << IPCT_SEQADJ
) |
1859 (1 << IPCT_MARK
) | events
,
1860 ct
, NETLINK_CB(skb
).portid
,
1867 /* implicit 'else' */
1870 ct
= nf_ct_tuplehash_to_ctrack(h
);
1871 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
)) {
1872 spin_lock_bh(&nf_conntrack_expect_lock
);
1873 err
= ctnetlink_change_conntrack(ct
, cda
);
1874 spin_unlock_bh(&nf_conntrack_expect_lock
);
1876 nf_conntrack_eventmask_report((1 << IPCT_REPLY
) |
1877 (1 << IPCT_ASSURED
) |
1878 (1 << IPCT_HELPER
) |
1880 (1 << IPCT_PROTOINFO
) |
1881 (1 << IPCT_SEQADJ
) |
1883 ct
, NETLINK_CB(skb
).portid
,
1893 ctnetlink_ct_stat_cpu_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
1894 __u16 cpu
, const struct ip_conntrack_stat
*st
)
1896 struct nlmsghdr
*nlh
;
1897 struct nfgenmsg
*nfmsg
;
1898 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1900 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS_CPU
);
1901 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1905 nfmsg
= nlmsg_data(nlh
);
1906 nfmsg
->nfgen_family
= AF_UNSPEC
;
1907 nfmsg
->version
= NFNETLINK_V0
;
1908 nfmsg
->res_id
= htons(cpu
);
1910 if (nla_put_be32(skb
, CTA_STATS_SEARCHED
, htonl(st
->searched
)) ||
1911 nla_put_be32(skb
, CTA_STATS_FOUND
, htonl(st
->found
)) ||
1912 nla_put_be32(skb
, CTA_STATS_NEW
, htonl(st
->new)) ||
1913 nla_put_be32(skb
, CTA_STATS_INVALID
, htonl(st
->invalid
)) ||
1914 nla_put_be32(skb
, CTA_STATS_IGNORE
, htonl(st
->ignore
)) ||
1915 nla_put_be32(skb
, CTA_STATS_DELETE
, htonl(st
->delete)) ||
1916 nla_put_be32(skb
, CTA_STATS_DELETE_LIST
, htonl(st
->delete_list
)) ||
1917 nla_put_be32(skb
, CTA_STATS_INSERT
, htonl(st
->insert
)) ||
1918 nla_put_be32(skb
, CTA_STATS_INSERT_FAILED
,
1919 htonl(st
->insert_failed
)) ||
1920 nla_put_be32(skb
, CTA_STATS_DROP
, htonl(st
->drop
)) ||
1921 nla_put_be32(skb
, CTA_STATS_EARLY_DROP
, htonl(st
->early_drop
)) ||
1922 nla_put_be32(skb
, CTA_STATS_ERROR
, htonl(st
->error
)) ||
1923 nla_put_be32(skb
, CTA_STATS_SEARCH_RESTART
,
1924 htonl(st
->search_restart
)))
1925 goto nla_put_failure
;
1927 nlmsg_end(skb
, nlh
);
1932 nlmsg_cancel(skb
, nlh
);
1937 ctnetlink_ct_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1940 struct net
*net
= sock_net(skb
->sk
);
1942 if (cb
->args
[0] == nr_cpu_ids
)
1945 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
1946 const struct ip_conntrack_stat
*st
;
1948 if (!cpu_possible(cpu
))
1951 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
1952 if (ctnetlink_ct_stat_cpu_fill_info(skb
,
1953 NETLINK_CB(cb
->skb
).portid
,
1964 ctnetlink_stat_ct_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
1965 const struct nlmsghdr
*nlh
,
1966 const struct nlattr
* const cda
[])
1968 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1969 struct netlink_dump_control c
= {
1970 .dump
= ctnetlink_ct_stat_cpu_dump
,
1972 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1979 ctnetlink_stat_ct_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
1982 struct nlmsghdr
*nlh
;
1983 struct nfgenmsg
*nfmsg
;
1984 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
1985 unsigned int nr_conntracks
= atomic_read(&net
->ct
.count
);
1987 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_CT_GET_STATS
);
1988 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
1992 nfmsg
= nlmsg_data(nlh
);
1993 nfmsg
->nfgen_family
= AF_UNSPEC
;
1994 nfmsg
->version
= NFNETLINK_V0
;
1997 if (nla_put_be32(skb
, CTA_STATS_GLOBAL_ENTRIES
, htonl(nr_conntracks
)))
1998 goto nla_put_failure
;
2000 nlmsg_end(skb
, nlh
);
2005 nlmsg_cancel(skb
, nlh
);
2010 ctnetlink_stat_ct(struct sock
*ctnl
, struct sk_buff
*skb
,
2011 const struct nlmsghdr
*nlh
,
2012 const struct nlattr
* const cda
[])
2014 struct sk_buff
*skb2
;
2017 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
2021 err
= ctnetlink_stat_ct_fill_info(skb2
, NETLINK_CB(skb
).portid
,
2023 NFNL_MSG_TYPE(nlh
->nlmsg_type
),
2028 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
2037 /* this avoids a loop in nfnetlink. */
2038 return err
== -EAGAIN
? -ENOBUFS
: err
;
2041 static const struct nla_policy exp_nla_policy
[CTA_EXPECT_MAX
+1] = {
2042 [CTA_EXPECT_MASTER
] = { .type
= NLA_NESTED
},
2043 [CTA_EXPECT_TUPLE
] = { .type
= NLA_NESTED
},
2044 [CTA_EXPECT_MASK
] = { .type
= NLA_NESTED
},
2045 [CTA_EXPECT_TIMEOUT
] = { .type
= NLA_U32
},
2046 [CTA_EXPECT_ID
] = { .type
= NLA_U32
},
2047 [CTA_EXPECT_HELP_NAME
] = { .type
= NLA_NUL_STRING
,
2048 .len
= NF_CT_HELPER_NAME_LEN
- 1 },
2049 [CTA_EXPECT_ZONE
] = { .type
= NLA_U16
},
2050 [CTA_EXPECT_FLAGS
] = { .type
= NLA_U32
},
2051 [CTA_EXPECT_CLASS
] = { .type
= NLA_U32
},
2052 [CTA_EXPECT_NAT
] = { .type
= NLA_NESTED
},
2053 [CTA_EXPECT_FN
] = { .type
= NLA_NUL_STRING
},
2056 static struct nf_conntrack_expect
*
2057 ctnetlink_alloc_expect(const struct nlattr
*const cda
[], struct nf_conn
*ct
,
2058 struct nf_conntrack_helper
*helper
,
2059 struct nf_conntrack_tuple
*tuple
,
2060 struct nf_conntrack_tuple
*mask
);
2062 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
2064 ctnetlink_nfqueue_build_size(const struct nf_conn
*ct
)
2066 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2067 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2068 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2069 + 3 * nla_total_size(sizeof(u_int8_t
)) /* CTA_PROTO_NUM */
2070 + nla_total_size(sizeof(u_int32_t
)) /* CTA_ID */
2071 + nla_total_size(sizeof(u_int32_t
)) /* CTA_STATUS */
2072 + nla_total_size(sizeof(u_int32_t
)) /* CTA_TIMEOUT */
2073 + nla_total_size(0) /* CTA_PROTOINFO */
2074 + nla_total_size(0) /* CTA_HELP */
2075 + nla_total_size(NF_CT_HELPER_NAME_LEN
) /* CTA_HELP_NAME */
2076 + ctnetlink_secctx_size(ct
)
2077 #ifdef CONFIG_NF_NAT_NEEDED
2078 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2079 + 6 * nla_total_size(sizeof(u_int32_t
)) /* CTA_NAT_SEQ_OFFSET */
2081 #ifdef CONFIG_NF_CONNTRACK_MARK
2082 + nla_total_size(sizeof(u_int32_t
)) /* CTA_MARK */
2084 #ifdef CONFIG_NF_CONNTRACK_ZONES
2085 + nla_total_size(sizeof(u_int16_t
)) /* CTA_ZONE */
2087 + ctnetlink_proto_size(ct
)
2092 ctnetlink_nfqueue_build(struct sk_buff
*skb
, struct nf_conn
*ct
)
2094 struct nlattr
*nest_parms
;
2097 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_ORIG
| NLA_F_NESTED
);
2099 goto nla_put_failure
;
2100 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
2101 goto nla_put_failure
;
2102 nla_nest_end(skb
, nest_parms
);
2104 nest_parms
= nla_nest_start(skb
, CTA_TUPLE_REPLY
| NLA_F_NESTED
);
2106 goto nla_put_failure
;
2107 if (ctnetlink_dump_tuples(skb
, nf_ct_tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
2108 goto nla_put_failure
;
2109 nla_nest_end(skb
, nest_parms
);
2111 if (nf_ct_zone(ct
)) {
2112 if (nla_put_be16(skb
, CTA_ZONE
, htons(nf_ct_zone(ct
))))
2113 goto nla_put_failure
;
2116 if (ctnetlink_dump_id(skb
, ct
) < 0)
2117 goto nla_put_failure
;
2119 if (ctnetlink_dump_status(skb
, ct
) < 0)
2120 goto nla_put_failure
;
2122 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
2123 goto nla_put_failure
;
2125 if (ctnetlink_dump_protoinfo(skb
, ct
) < 0)
2126 goto nla_put_failure
;
2128 if (ctnetlink_dump_helpinfo(skb
, ct
) < 0)
2129 goto nla_put_failure
;
2131 #ifdef CONFIG_NF_CONNTRACK_SECMARK
2132 if (ct
->secmark
&& ctnetlink_dump_secctx(skb
, ct
) < 0)
2133 goto nla_put_failure
;
2135 if (ct
->master
&& ctnetlink_dump_master(skb
, ct
) < 0)
2136 goto nla_put_failure
;
2138 if ((ct
->status
& IPS_SEQ_ADJUST
) &&
2139 ctnetlink_dump_ct_seq_adj(skb
, ct
) < 0)
2140 goto nla_put_failure
;
2142 #ifdef CONFIG_NF_CONNTRACK_MARK
2143 if (ct
->mark
&& ctnetlink_dump_mark(skb
, ct
) < 0)
2144 goto nla_put_failure
;
2146 if (ctnetlink_dump_labels(skb
, ct
) < 0)
2147 goto nla_put_failure
;
2157 ctnetlink_nfqueue_parse_ct(const struct nlattr
*cda
[], struct nf_conn
*ct
)
2161 if (cda
[CTA_TIMEOUT
]) {
2162 err
= ctnetlink_change_timeout(ct
, cda
);
2166 if (cda
[CTA_STATUS
]) {
2167 err
= ctnetlink_change_status(ct
, cda
);
2171 if (cda
[CTA_HELP
]) {
2172 err
= ctnetlink_change_helper(ct
, cda
);
2176 if (cda
[CTA_LABELS
]) {
2177 err
= ctnetlink_attach_labels(ct
, cda
);
2181 #if defined(CONFIG_NF_CONNTRACK_MARK)
2182 if (cda
[CTA_MARK
]) {
2183 u32 mask
= 0, mark
, newmark
;
2184 if (cda
[CTA_MARK_MASK
])
2185 mask
= ~ntohl(nla_get_be32(cda
[CTA_MARK_MASK
]));
2187 mark
= ntohl(nla_get_be32(cda
[CTA_MARK
]));
2188 newmark
= (ct
->mark
& mask
) ^ mark
;
2189 if (newmark
!= ct
->mark
)
2197 ctnetlink_nfqueue_parse(const struct nlattr
*attr
, struct nf_conn
*ct
)
2199 struct nlattr
*cda
[CTA_MAX
+1];
2202 ret
= nla_parse_nested(cda
, CTA_MAX
, attr
, ct_nla_policy
);
2206 spin_lock_bh(&nf_conntrack_expect_lock
);
2207 ret
= ctnetlink_nfqueue_parse_ct((const struct nlattr
**)cda
, ct
);
2208 spin_unlock_bh(&nf_conntrack_expect_lock
);
2213 static int ctnetlink_nfqueue_exp_parse(const struct nlattr
* const *cda
,
2214 const struct nf_conn
*ct
,
2215 struct nf_conntrack_tuple
*tuple
,
2216 struct nf_conntrack_tuple
*mask
)
2220 err
= ctnetlink_parse_tuple(cda
, tuple
, CTA_EXPECT_TUPLE
,
2225 return ctnetlink_parse_tuple(cda
, mask
, CTA_EXPECT_MASK
,
2230 ctnetlink_nfqueue_attach_expect(const struct nlattr
*attr
, struct nf_conn
*ct
,
2231 u32 portid
, u32 report
)
2233 struct nlattr
*cda
[CTA_EXPECT_MAX
+1];
2234 struct nf_conntrack_tuple tuple
, mask
;
2235 struct nf_conntrack_helper
*helper
= NULL
;
2236 struct nf_conntrack_expect
*exp
;
2239 err
= nla_parse_nested(cda
, CTA_EXPECT_MAX
, attr
, exp_nla_policy
);
2243 err
= ctnetlink_nfqueue_exp_parse((const struct nlattr
* const *)cda
,
2248 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2249 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2251 helper
= __nf_conntrack_helper_find(helpname
, nf_ct_l3num(ct
),
2252 nf_ct_protonum(ct
));
2257 exp
= ctnetlink_alloc_expect((const struct nlattr
* const *)cda
, ct
,
2258 helper
, &tuple
, &mask
);
2260 return PTR_ERR(exp
);
2262 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2264 nf_ct_expect_put(exp
);
2271 static struct nfq_ct_hook ctnetlink_nfqueue_hook
= {
2272 .build_size
= ctnetlink_nfqueue_build_size
,
2273 .build
= ctnetlink_nfqueue_build
,
2274 .parse
= ctnetlink_nfqueue_parse
,
2275 .attach_expect
= ctnetlink_nfqueue_attach_expect
,
2276 .seq_adjust
= nf_ct_tcp_seqadj_set
,
2278 #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
2280 /***********************************************************************
2282 ***********************************************************************/
2285 ctnetlink_exp_dump_tuple(struct sk_buff
*skb
,
2286 const struct nf_conntrack_tuple
*tuple
,
2287 enum ctattr_expect type
)
2289 struct nlattr
*nest_parms
;
2291 nest_parms
= nla_nest_start(skb
, type
| NLA_F_NESTED
);
2293 goto nla_put_failure
;
2294 if (ctnetlink_dump_tuples(skb
, tuple
) < 0)
2295 goto nla_put_failure
;
2296 nla_nest_end(skb
, nest_parms
);
2305 ctnetlink_exp_dump_mask(struct sk_buff
*skb
,
2306 const struct nf_conntrack_tuple
*tuple
,
2307 const struct nf_conntrack_tuple_mask
*mask
)
2310 struct nf_conntrack_l3proto
*l3proto
;
2311 struct nf_conntrack_l4proto
*l4proto
;
2312 struct nf_conntrack_tuple m
;
2313 struct nlattr
*nest_parms
;
2315 memset(&m
, 0xFF, sizeof(m
));
2316 memcpy(&m
.src
.u3
, &mask
->src
.u3
, sizeof(m
.src
.u3
));
2317 m
.src
.u
.all
= mask
->src
.u
.all
;
2318 m
.dst
.protonum
= tuple
->dst
.protonum
;
2320 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_MASK
| NLA_F_NESTED
);
2322 goto nla_put_failure
;
2325 l3proto
= __nf_ct_l3proto_find(tuple
->src
.l3num
);
2326 ret
= ctnetlink_dump_tuples_ip(skb
, &m
, l3proto
);
2328 l4proto
= __nf_ct_l4proto_find(tuple
->src
.l3num
,
2329 tuple
->dst
.protonum
);
2330 ret
= ctnetlink_dump_tuples_proto(skb
, &m
, l4proto
);
2334 if (unlikely(ret
< 0))
2335 goto nla_put_failure
;
2337 nla_nest_end(skb
, nest_parms
);
2345 static const union nf_inet_addr any_addr
;
2348 ctnetlink_exp_dump_expect(struct sk_buff
*skb
,
2349 const struct nf_conntrack_expect
*exp
)
2351 struct nf_conn
*master
= exp
->master
;
2352 long timeout
= ((long)exp
->timeout
.expires
- (long)jiffies
) / HZ
;
2353 struct nf_conn_help
*help
;
2354 #ifdef CONFIG_NF_NAT_NEEDED
2355 struct nlattr
*nest_parms
;
2356 struct nf_conntrack_tuple nat_tuple
= {};
2358 struct nf_ct_helper_expectfn
*expfn
;
2363 if (ctnetlink_exp_dump_tuple(skb
, &exp
->tuple
, CTA_EXPECT_TUPLE
) < 0)
2364 goto nla_put_failure
;
2365 if (ctnetlink_exp_dump_mask(skb
, &exp
->tuple
, &exp
->mask
) < 0)
2366 goto nla_put_failure
;
2367 if (ctnetlink_exp_dump_tuple(skb
,
2368 &master
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
2369 CTA_EXPECT_MASTER
) < 0)
2370 goto nla_put_failure
;
2372 #ifdef CONFIG_NF_NAT_NEEDED
2373 if (!nf_inet_addr_cmp(&exp
->saved_addr
, &any_addr
) ||
2374 exp
->saved_proto
.all
) {
2375 nest_parms
= nla_nest_start(skb
, CTA_EXPECT_NAT
| NLA_F_NESTED
);
2377 goto nla_put_failure
;
2379 if (nla_put_be32(skb
, CTA_EXPECT_NAT_DIR
, htonl(exp
->dir
)))
2380 goto nla_put_failure
;
2382 nat_tuple
.src
.l3num
= nf_ct_l3num(master
);
2383 nat_tuple
.src
.u3
= exp
->saved_addr
;
2384 nat_tuple
.dst
.protonum
= nf_ct_protonum(master
);
2385 nat_tuple
.src
.u
= exp
->saved_proto
;
2387 if (ctnetlink_exp_dump_tuple(skb
, &nat_tuple
,
2388 CTA_EXPECT_NAT_TUPLE
) < 0)
2389 goto nla_put_failure
;
2390 nla_nest_end(skb
, nest_parms
);
2393 if (nla_put_be32(skb
, CTA_EXPECT_TIMEOUT
, htonl(timeout
)) ||
2394 nla_put_be32(skb
, CTA_EXPECT_ID
, htonl((unsigned long)exp
)) ||
2395 nla_put_be32(skb
, CTA_EXPECT_FLAGS
, htonl(exp
->flags
)) ||
2396 nla_put_be32(skb
, CTA_EXPECT_CLASS
, htonl(exp
->class)))
2397 goto nla_put_failure
;
2398 help
= nfct_help(master
);
2400 struct nf_conntrack_helper
*helper
;
2402 helper
= rcu_dereference(help
->helper
);
2404 nla_put_string(skb
, CTA_EXPECT_HELP_NAME
, helper
->name
))
2405 goto nla_put_failure
;
2407 expfn
= nf_ct_helper_expectfn_find_by_symbol(exp
->expectfn
);
2408 if (expfn
!= NULL
&&
2409 nla_put_string(skb
, CTA_EXPECT_FN
, expfn
->name
))
2410 goto nla_put_failure
;
2419 ctnetlink_exp_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
,
2420 int event
, const struct nf_conntrack_expect
*exp
)
2422 struct nlmsghdr
*nlh
;
2423 struct nfgenmsg
*nfmsg
;
2424 unsigned int flags
= portid
? NLM_F_MULTI
: 0;
2426 event
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2427 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
2431 nfmsg
= nlmsg_data(nlh
);
2432 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2433 nfmsg
->version
= NFNETLINK_V0
;
2436 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2437 goto nla_put_failure
;
2439 nlmsg_end(skb
, nlh
);
2444 nlmsg_cancel(skb
, nlh
);
2448 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2450 ctnetlink_expect_event(unsigned int events
, struct nf_exp_event
*item
)
2452 struct nf_conntrack_expect
*exp
= item
->exp
;
2453 struct net
*net
= nf_ct_exp_net(exp
);
2454 struct nlmsghdr
*nlh
;
2455 struct nfgenmsg
*nfmsg
;
2456 struct sk_buff
*skb
;
2457 unsigned int type
, group
;
2460 if (events
& (1 << IPEXP_DESTROY
)) {
2461 type
= IPCTNL_MSG_EXP_DELETE
;
2462 group
= NFNLGRP_CONNTRACK_EXP_DESTROY
;
2463 } else if (events
& (1 << IPEXP_NEW
)) {
2464 type
= IPCTNL_MSG_EXP_NEW
;
2465 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
2466 group
= NFNLGRP_CONNTRACK_EXP_NEW
;
2470 if (!item
->report
&& !nfnetlink_has_listeners(net
, group
))
2473 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
2477 type
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
2478 nlh
= nlmsg_put(skb
, item
->portid
, 0, type
, sizeof(*nfmsg
), flags
);
2482 nfmsg
= nlmsg_data(nlh
);
2483 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
2484 nfmsg
->version
= NFNETLINK_V0
;
2488 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
2489 goto nla_put_failure
;
2492 nlmsg_end(skb
, nlh
);
2493 nfnetlink_send(skb
, net
, item
->portid
, group
, item
->report
, GFP_ATOMIC
);
2498 nlmsg_cancel(skb
, nlh
);
2502 nfnetlink_set_err(net
, 0, 0, -ENOBUFS
);
2506 static int ctnetlink_exp_done(struct netlink_callback
*cb
)
2509 nf_ct_expect_put((struct nf_conntrack_expect
*)cb
->args
[1]);
2514 ctnetlink_exp_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2516 struct net
*net
= sock_net(skb
->sk
);
2517 struct nf_conntrack_expect
*exp
, *last
;
2518 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2519 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2522 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2523 for (; cb
->args
[0] < nf_ct_expect_hsize
; cb
->args
[0]++) {
2525 hlist_for_each_entry(exp
, &net
->ct
.expect_hash
[cb
->args
[0]],
2527 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2534 if (ctnetlink_exp_fill_info(skb
,
2535 NETLINK_CB(cb
->skb
).portid
,
2539 if (!atomic_inc_not_zero(&exp
->use
))
2541 cb
->args
[1] = (unsigned long)exp
;
2553 nf_ct_expect_put(last
);
2559 ctnetlink_exp_ct_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2561 struct nf_conntrack_expect
*exp
, *last
;
2562 struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2563 struct nf_conn
*ct
= cb
->data
;
2564 struct nf_conn_help
*help
= nfct_help(ct
);
2565 u_int8_t l3proto
= nfmsg
->nfgen_family
;
2571 last
= (struct nf_conntrack_expect
*)cb
->args
[1];
2573 hlist_for_each_entry(exp
, &help
->expectations
, lnode
) {
2574 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
2581 if (ctnetlink_exp_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
2585 if (!atomic_inc_not_zero(&exp
->use
))
2587 cb
->args
[1] = (unsigned long)exp
;
2599 nf_ct_expect_put(last
);
2604 static int ctnetlink_dump_exp_ct(struct sock
*ctnl
, struct sk_buff
*skb
,
2605 const struct nlmsghdr
*nlh
,
2606 const struct nlattr
* const cda
[])
2609 struct net
*net
= sock_net(ctnl
);
2610 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2611 u_int8_t u3
= nfmsg
->nfgen_family
;
2612 struct nf_conntrack_tuple tuple
;
2613 struct nf_conntrack_tuple_hash
*h
;
2616 struct netlink_dump_control c
= {
2617 .dump
= ctnetlink_exp_ct_dump_table
,
2618 .done
= ctnetlink_exp_done
,
2621 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
2625 if (cda
[CTA_EXPECT_ZONE
]) {
2626 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2631 h
= nf_conntrack_find_get(net
, zone
, &tuple
);
2635 ct
= nf_ct_tuplehash_to_ctrack(h
);
2638 err
= netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2645 ctnetlink_get_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2646 const struct nlmsghdr
*nlh
,
2647 const struct nlattr
* const cda
[])
2649 struct net
*net
= sock_net(ctnl
);
2650 struct nf_conntrack_tuple tuple
;
2651 struct nf_conntrack_expect
*exp
;
2652 struct sk_buff
*skb2
;
2653 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2654 u_int8_t u3
= nfmsg
->nfgen_family
;
2658 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
2659 if (cda
[CTA_EXPECT_MASTER
])
2660 return ctnetlink_dump_exp_ct(ctnl
, skb
, nlh
, cda
);
2662 struct netlink_dump_control c
= {
2663 .dump
= ctnetlink_exp_dump_table
,
2664 .done
= ctnetlink_exp_done
,
2666 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
2670 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2674 if (cda
[CTA_EXPECT_TUPLE
])
2675 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2676 else if (cda
[CTA_EXPECT_MASTER
])
2677 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
2684 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2688 if (cda
[CTA_EXPECT_ID
]) {
2689 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2690 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2691 nf_ct_expect_put(exp
);
2697 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
2699 nf_ct_expect_put(exp
);
2704 err
= ctnetlink_exp_fill_info(skb2
, NETLINK_CB(skb
).portid
,
2705 nlh
->nlmsg_seq
, IPCTNL_MSG_EXP_NEW
, exp
);
2707 nf_ct_expect_put(exp
);
2711 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
2720 /* this avoids a loop in nfnetlink. */
2721 return err
== -EAGAIN
? -ENOBUFS
: err
;
2725 ctnetlink_del_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
2726 const struct nlmsghdr
*nlh
,
2727 const struct nlattr
* const cda
[])
2729 struct net
*net
= sock_net(ctnl
);
2730 struct nf_conntrack_expect
*exp
;
2731 struct nf_conntrack_tuple tuple
;
2732 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2733 struct hlist_node
*next
;
2734 u_int8_t u3
= nfmsg
->nfgen_family
;
2739 if (cda
[CTA_EXPECT_TUPLE
]) {
2740 /* delete a single expect by tuple */
2741 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
2745 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2749 /* bump usage count to 2 */
2750 exp
= nf_ct_expect_find_get(net
, zone
, &tuple
);
2754 if (cda
[CTA_EXPECT_ID
]) {
2755 __be32 id
= nla_get_be32(cda
[CTA_EXPECT_ID
]);
2756 if (ntohl(id
) != (u32
)(unsigned long)exp
) {
2757 nf_ct_expect_put(exp
);
2762 /* after list removal, usage count == 1 */
2763 spin_lock_bh(&nf_conntrack_expect_lock
);
2764 if (del_timer(&exp
->timeout
)) {
2765 nf_ct_unlink_expect_report(exp
, NETLINK_CB(skb
).portid
,
2767 nf_ct_expect_put(exp
);
2769 spin_unlock_bh(&nf_conntrack_expect_lock
);
2770 /* have to put what we 'get' above.
2771 * after this line usage count == 0 */
2772 nf_ct_expect_put(exp
);
2773 } else if (cda
[CTA_EXPECT_HELP_NAME
]) {
2774 char *name
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2775 struct nf_conn_help
*m_help
;
2777 /* delete all expectations for this helper */
2778 spin_lock_bh(&nf_conntrack_expect_lock
);
2779 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2780 hlist_for_each_entry_safe(exp
, next
,
2781 &net
->ct
.expect_hash
[i
],
2783 m_help
= nfct_help(exp
->master
);
2784 if (!strcmp(m_help
->helper
->name
, name
) &&
2785 del_timer(&exp
->timeout
)) {
2786 nf_ct_unlink_expect_report(exp
,
2787 NETLINK_CB(skb
).portid
,
2789 nf_ct_expect_put(exp
);
2793 spin_unlock_bh(&nf_conntrack_expect_lock
);
2795 /* This basically means we have to flush everything*/
2796 spin_lock_bh(&nf_conntrack_expect_lock
);
2797 for (i
= 0; i
< nf_ct_expect_hsize
; i
++) {
2798 hlist_for_each_entry_safe(exp
, next
,
2799 &net
->ct
.expect_hash
[i
],
2801 if (del_timer(&exp
->timeout
)) {
2802 nf_ct_unlink_expect_report(exp
,
2803 NETLINK_CB(skb
).portid
,
2805 nf_ct_expect_put(exp
);
2809 spin_unlock_bh(&nf_conntrack_expect_lock
);
2815 ctnetlink_change_expect(struct nf_conntrack_expect
*x
,
2816 const struct nlattr
* const cda
[])
2818 if (cda
[CTA_EXPECT_TIMEOUT
]) {
2819 if (!del_timer(&x
->timeout
))
2822 x
->timeout
.expires
= jiffies
+
2823 ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2824 add_timer(&x
->timeout
);
2829 static const struct nla_policy exp_nat_nla_policy
[CTA_EXPECT_NAT_MAX
+1] = {
2830 [CTA_EXPECT_NAT_DIR
] = { .type
= NLA_U32
},
2831 [CTA_EXPECT_NAT_TUPLE
] = { .type
= NLA_NESTED
},
2835 ctnetlink_parse_expect_nat(const struct nlattr
*attr
,
2836 struct nf_conntrack_expect
*exp
,
2839 #ifdef CONFIG_NF_NAT_NEEDED
2840 struct nlattr
*tb
[CTA_EXPECT_NAT_MAX
+1];
2841 struct nf_conntrack_tuple nat_tuple
= {};
2844 err
= nla_parse_nested(tb
, CTA_EXPECT_NAT_MAX
, attr
, exp_nat_nla_policy
);
2848 if (!tb
[CTA_EXPECT_NAT_DIR
] || !tb
[CTA_EXPECT_NAT_TUPLE
])
2851 err
= ctnetlink_parse_tuple((const struct nlattr
* const *)tb
,
2852 &nat_tuple
, CTA_EXPECT_NAT_TUPLE
, u3
);
2856 exp
->saved_addr
= nat_tuple
.src
.u3
;
2857 exp
->saved_proto
= nat_tuple
.src
.u
;
2858 exp
->dir
= ntohl(nla_get_be32(tb
[CTA_EXPECT_NAT_DIR
]));
2866 static struct nf_conntrack_expect
*
2867 ctnetlink_alloc_expect(const struct nlattr
* const cda
[], struct nf_conn
*ct
,
2868 struct nf_conntrack_helper
*helper
,
2869 struct nf_conntrack_tuple
*tuple
,
2870 struct nf_conntrack_tuple
*mask
)
2872 u_int32_t
class = 0;
2873 struct nf_conntrack_expect
*exp
;
2874 struct nf_conn_help
*help
;
2877 if (cda
[CTA_EXPECT_CLASS
] && helper
) {
2878 class = ntohl(nla_get_be32(cda
[CTA_EXPECT_CLASS
]));
2879 if (class > helper
->expect_class_max
)
2880 return ERR_PTR(-EINVAL
);
2882 exp
= nf_ct_expect_alloc(ct
);
2884 return ERR_PTR(-ENOMEM
);
2886 help
= nfct_help(ct
);
2888 if (!cda
[CTA_EXPECT_TIMEOUT
]) {
2892 exp
->timeout
.expires
=
2893 jiffies
+ ntohl(nla_get_be32(cda
[CTA_EXPECT_TIMEOUT
])) * HZ
;
2895 exp
->flags
= NF_CT_EXPECT_USERSPACE
;
2896 if (cda
[CTA_EXPECT_FLAGS
]) {
2898 ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2901 if (cda
[CTA_EXPECT_FLAGS
]) {
2902 exp
->flags
= ntohl(nla_get_be32(cda
[CTA_EXPECT_FLAGS
]));
2903 exp
->flags
&= ~NF_CT_EXPECT_USERSPACE
;
2907 if (cda
[CTA_EXPECT_FN
]) {
2908 const char *name
= nla_data(cda
[CTA_EXPECT_FN
]);
2909 struct nf_ct_helper_expectfn
*expfn
;
2911 expfn
= nf_ct_helper_expectfn_find_by_name(name
);
2912 if (expfn
== NULL
) {
2916 exp
->expectfn
= expfn
->expectfn
;
2918 exp
->expectfn
= NULL
;
2922 exp
->helper
= helper
;
2923 exp
->tuple
= *tuple
;
2924 exp
->mask
.src
.u3
= mask
->src
.u3
;
2925 exp
->mask
.src
.u
.all
= mask
->src
.u
.all
;
2927 if (cda
[CTA_EXPECT_NAT
]) {
2928 err
= ctnetlink_parse_expect_nat(cda
[CTA_EXPECT_NAT
],
2929 exp
, nf_ct_l3num(ct
));
2935 nf_ct_expect_put(exp
);
2936 return ERR_PTR(err
);
2940 ctnetlink_create_expect(struct net
*net
, u16 zone
,
2941 const struct nlattr
* const cda
[],
2942 u_int8_t u3
, u32 portid
, int report
)
2944 struct nf_conntrack_tuple tuple
, mask
, master_tuple
;
2945 struct nf_conntrack_tuple_hash
*h
= NULL
;
2946 struct nf_conntrack_helper
*helper
= NULL
;
2947 struct nf_conntrack_expect
*exp
;
2951 /* caller guarantees that those three CTA_EXPECT_* exist */
2952 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
2955 err
= ctnetlink_parse_tuple(cda
, &mask
, CTA_EXPECT_MASK
, u3
);
2958 err
= ctnetlink_parse_tuple(cda
, &master_tuple
, CTA_EXPECT_MASTER
, u3
);
2962 /* Look for master conntrack of this expectation */
2963 h
= nf_conntrack_find_get(net
, zone
, &master_tuple
);
2966 ct
= nf_ct_tuplehash_to_ctrack(h
);
2968 if (cda
[CTA_EXPECT_HELP_NAME
]) {
2969 const char *helpname
= nla_data(cda
[CTA_EXPECT_HELP_NAME
]);
2971 helper
= __nf_conntrack_helper_find(helpname
, u3
,
2972 nf_ct_protonum(ct
));
2973 if (helper
== NULL
) {
2974 #ifdef CONFIG_MODULES
2975 if (request_module("nfct-helper-%s", helpname
) < 0) {
2979 helper
= __nf_conntrack_helper_find(helpname
, u3
,
2980 nf_ct_protonum(ct
));
2991 exp
= ctnetlink_alloc_expect(cda
, ct
, helper
, &tuple
, &mask
);
2997 err
= nf_ct_expect_related_report(exp
, portid
, report
);
2998 nf_ct_expect_put(exp
);
3005 ctnetlink_new_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
3006 const struct nlmsghdr
*nlh
,
3007 const struct nlattr
* const cda
[])
3009 struct net
*net
= sock_net(ctnl
);
3010 struct nf_conntrack_tuple tuple
;
3011 struct nf_conntrack_expect
*exp
;
3012 struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
3013 u_int8_t u3
= nfmsg
->nfgen_family
;
3017 if (!cda
[CTA_EXPECT_TUPLE
]
3018 || !cda
[CTA_EXPECT_MASK
]
3019 || !cda
[CTA_EXPECT_MASTER
])
3022 err
= ctnetlink_parse_zone(cda
[CTA_EXPECT_ZONE
], &zone
);
3026 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
3030 spin_lock_bh(&nf_conntrack_expect_lock
);
3031 exp
= __nf_ct_expect_find(net
, zone
, &tuple
);
3034 spin_unlock_bh(&nf_conntrack_expect_lock
);
3036 if (nlh
->nlmsg_flags
& NLM_F_CREATE
) {
3037 err
= ctnetlink_create_expect(net
, zone
, cda
,
3039 NETLINK_CB(skb
).portid
,
3046 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
))
3047 err
= ctnetlink_change_expect(exp
, cda
);
3048 spin_unlock_bh(&nf_conntrack_expect_lock
);
3054 ctnetlink_exp_stat_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, int cpu
,
3055 const struct ip_conntrack_stat
*st
)
3057 struct nlmsghdr
*nlh
;
3058 struct nfgenmsg
*nfmsg
;
3059 unsigned int flags
= portid
? NLM_F_MULTI
: 0, event
;
3061 event
= (NFNL_SUBSYS_CTNETLINK
<< 8 | IPCTNL_MSG_EXP_GET_STATS_CPU
);
3062 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
3066 nfmsg
= nlmsg_data(nlh
);
3067 nfmsg
->nfgen_family
= AF_UNSPEC
;
3068 nfmsg
->version
= NFNETLINK_V0
;
3069 nfmsg
->res_id
= htons(cpu
);
3071 if (nla_put_be32(skb
, CTA_STATS_EXP_NEW
, htonl(st
->expect_new
)) ||
3072 nla_put_be32(skb
, CTA_STATS_EXP_CREATE
, htonl(st
->expect_create
)) ||
3073 nla_put_be32(skb
, CTA_STATS_EXP_DELETE
, htonl(st
->expect_delete
)))
3074 goto nla_put_failure
;
3076 nlmsg_end(skb
, nlh
);
3081 nlmsg_cancel(skb
, nlh
);
3086 ctnetlink_exp_stat_cpu_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3089 struct net
*net
= sock_net(skb
->sk
);
3091 if (cb
->args
[0] == nr_cpu_ids
)
3094 for (cpu
= cb
->args
[0]; cpu
< nr_cpu_ids
; cpu
++) {
3095 const struct ip_conntrack_stat
*st
;
3097 if (!cpu_possible(cpu
))
3100 st
= per_cpu_ptr(net
->ct
.stat
, cpu
);
3101 if (ctnetlink_exp_stat_fill_info(skb
, NETLINK_CB(cb
->skb
).portid
,
3112 ctnetlink_stat_exp_cpu(struct sock
*ctnl
, struct sk_buff
*skb
,
3113 const struct nlmsghdr
*nlh
,
3114 const struct nlattr
* const cda
[])
3116 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
3117 struct netlink_dump_control c
= {
3118 .dump
= ctnetlink_exp_stat_cpu_dump
,
3120 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
3126 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3127 static struct nf_ct_event_notifier ctnl_notifier
= {
3128 .fcn
= ctnetlink_conntrack_event
,
3131 static struct nf_exp_event_notifier ctnl_notifier_exp
= {
3132 .fcn
= ctnetlink_expect_event
,
3136 static const struct nfnl_callback ctnl_cb
[IPCTNL_MSG_MAX
] = {
3137 [IPCTNL_MSG_CT_NEW
] = { .call
= ctnetlink_new_conntrack
,
3138 .attr_count
= CTA_MAX
,
3139 .policy
= ct_nla_policy
},
3140 [IPCTNL_MSG_CT_GET
] = { .call
= ctnetlink_get_conntrack
,
3141 .attr_count
= CTA_MAX
,
3142 .policy
= ct_nla_policy
},
3143 [IPCTNL_MSG_CT_DELETE
] = { .call
= ctnetlink_del_conntrack
,
3144 .attr_count
= CTA_MAX
,
3145 .policy
= ct_nla_policy
},
3146 [IPCTNL_MSG_CT_GET_CTRZERO
] = { .call
= ctnetlink_get_conntrack
,
3147 .attr_count
= CTA_MAX
,
3148 .policy
= ct_nla_policy
},
3149 [IPCTNL_MSG_CT_GET_STATS_CPU
] = { .call
= ctnetlink_stat_ct_cpu
},
3150 [IPCTNL_MSG_CT_GET_STATS
] = { .call
= ctnetlink_stat_ct
},
3151 [IPCTNL_MSG_CT_GET_DYING
] = { .call
= ctnetlink_get_ct_dying
},
3152 [IPCTNL_MSG_CT_GET_UNCONFIRMED
] = { .call
= ctnetlink_get_ct_unconfirmed
},
3155 static const struct nfnl_callback ctnl_exp_cb
[IPCTNL_MSG_EXP_MAX
] = {
3156 [IPCTNL_MSG_EXP_GET
] = { .call
= ctnetlink_get_expect
,
3157 .attr_count
= CTA_EXPECT_MAX
,
3158 .policy
= exp_nla_policy
},
3159 [IPCTNL_MSG_EXP_NEW
] = { .call
= ctnetlink_new_expect
,
3160 .attr_count
= CTA_EXPECT_MAX
,
3161 .policy
= exp_nla_policy
},
3162 [IPCTNL_MSG_EXP_DELETE
] = { .call
= ctnetlink_del_expect
,
3163 .attr_count
= CTA_EXPECT_MAX
,
3164 .policy
= exp_nla_policy
},
3165 [IPCTNL_MSG_EXP_GET_STATS_CPU
] = { .call
= ctnetlink_stat_exp_cpu
},
3168 static const struct nfnetlink_subsystem ctnl_subsys
= {
3169 .name
= "conntrack",
3170 .subsys_id
= NFNL_SUBSYS_CTNETLINK
,
3171 .cb_count
= IPCTNL_MSG_MAX
,
3175 static const struct nfnetlink_subsystem ctnl_exp_subsys
= {
3176 .name
= "conntrack_expect",
3177 .subsys_id
= NFNL_SUBSYS_CTNETLINK_EXP
,
3178 .cb_count
= IPCTNL_MSG_EXP_MAX
,
3182 MODULE_ALIAS("ip_conntrack_netlink");
3183 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK
);
3184 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP
);
3186 static int __net_init
ctnetlink_net_init(struct net
*net
)
3188 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3191 ret
= nf_conntrack_register_notifier(net
, &ctnl_notifier
);
3193 pr_err("ctnetlink_init: cannot register notifier.\n");
3197 ret
= nf_ct_expect_register_notifier(net
, &ctnl_notifier_exp
);
3199 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3200 goto err_unreg_notifier
;
3205 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3207 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3213 static void ctnetlink_net_exit(struct net
*net
)
3215 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3216 nf_ct_expect_unregister_notifier(net
, &ctnl_notifier_exp
);
3217 nf_conntrack_unregister_notifier(net
, &ctnl_notifier
);
3221 static void __net_exit
ctnetlink_net_exit_batch(struct list_head
*net_exit_list
)
3225 list_for_each_entry(net
, net_exit_list
, exit_list
)
3226 ctnetlink_net_exit(net
);
3229 static struct pernet_operations ctnetlink_net_ops
= {
3230 .init
= ctnetlink_net_init
,
3231 .exit_batch
= ctnetlink_net_exit_batch
,
3234 static int __init
ctnetlink_init(void)
3238 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version
);
3239 ret
= nfnetlink_subsys_register(&ctnl_subsys
);
3241 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
3245 ret
= nfnetlink_subsys_register(&ctnl_exp_subsys
);
3247 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
3248 goto err_unreg_subsys
;
3251 ret
= register_pernet_subsys(&ctnetlink_net_ops
);
3253 pr_err("ctnetlink_init: cannot register pernet operations\n");
3254 goto err_unreg_exp_subsys
;
3256 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
3257 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3258 RCU_INIT_POINTER(nfq_ct_hook
, &ctnetlink_nfqueue_hook
);
3262 err_unreg_exp_subsys
:
3263 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3265 nfnetlink_subsys_unregister(&ctnl_subsys
);
3270 static void __exit
ctnetlink_exit(void)
3272 pr_info("ctnetlink: unregistering from nfnetlink.\n");
3274 unregister_pernet_subsys(&ctnetlink_net_ops
);
3275 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
3276 nfnetlink_subsys_unregister(&ctnl_subsys
);
3277 #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
3278 RCU_INIT_POINTER(nfq_ct_hook
, NULL
);
3282 module_init(ctnetlink_init
);
3283 module_exit(ctnetlink_exit
);