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) 2005-2006 by Pablo Neira Ayuso <pablo@eurodev.net>
9 * I've reworked this stuff to use attributes instead of conntrack
10 * structures. 5.44 am. I need more tea. --pablo 05/07/11.
12 * Initial connection tracking via netlink development funded and
13 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
15 * Further development of this code funded by Astaro AG (http://www.astaro.com)
17 * This software may be used and distributed according to the terms
18 * of the GNU General Public License, incorporated herein by reference.
20 * Derived from ip_conntrack_netlink.c: Port by Pablo Neira Ayuso (05/11/14)
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/timer.h>
28 #include <linux/skbuff.h>
29 #include <linux/errno.h>
30 #include <linux/netlink.h>
31 #include <linux/spinlock.h>
32 #include <linux/interrupt.h>
33 #include <linux/notifier.h>
35 #include <linux/netfilter.h>
36 #include <net/netlink.h>
37 #include <net/netfilter/nf_conntrack.h>
38 #include <net/netfilter/nf_conntrack_core.h>
39 #include <net/netfilter/nf_conntrack_expect.h>
40 #include <net/netfilter/nf_conntrack_helper.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 #ifdef CONFIG_NF_NAT_NEEDED
45 #include <net/netfilter/nf_nat_core.h>
46 #include <net/netfilter/nf_nat_protocol.h>
49 #include <linux/netfilter/nfnetlink.h>
50 #include <linux/netfilter/nfnetlink_conntrack.h>
52 MODULE_LICENSE("GPL");
54 static char __initdata version
[] = "0.93";
57 ctnetlink_dump_tuples_proto(struct sk_buff
*skb
,
58 const struct nf_conntrack_tuple
*tuple
,
59 struct nf_conntrack_l4proto
*l4proto
)
62 struct nfattr
*nest_parms
= NFA_NEST(skb
, CTA_TUPLE_PROTO
);
64 NFA_PUT(skb
, CTA_PROTO_NUM
, sizeof(u_int8_t
), &tuple
->dst
.protonum
);
66 if (likely(l4proto
->tuple_to_nfattr
))
67 ret
= l4proto
->tuple_to_nfattr(skb
, tuple
);
69 NFA_NEST_END(skb
, nest_parms
);
78 ctnetlink_dump_tuples_ip(struct sk_buff
*skb
,
79 const struct nf_conntrack_tuple
*tuple
,
80 struct nf_conntrack_l3proto
*l3proto
)
83 struct nfattr
*nest_parms
= NFA_NEST(skb
, CTA_TUPLE_IP
);
85 if (likely(l3proto
->tuple_to_nfattr
))
86 ret
= l3proto
->tuple_to_nfattr(skb
, tuple
);
88 NFA_NEST_END(skb
, nest_parms
);
97 ctnetlink_dump_tuples(struct sk_buff
*skb
,
98 const struct nf_conntrack_tuple
*tuple
)
101 struct nf_conntrack_l3proto
*l3proto
;
102 struct nf_conntrack_l4proto
*l4proto
;
104 l3proto
= nf_ct_l3proto_find_get(tuple
->src
.l3num
);
105 ret
= ctnetlink_dump_tuples_ip(skb
, tuple
, l3proto
);
106 nf_ct_l3proto_put(l3proto
);
108 if (unlikely(ret
< 0))
111 l4proto
= nf_ct_l4proto_find_get(tuple
->src
.l3num
, tuple
->dst
.protonum
);
112 ret
= ctnetlink_dump_tuples_proto(skb
, tuple
, l4proto
);
113 nf_ct_l4proto_put(l4proto
);
119 ctnetlink_dump_status(struct sk_buff
*skb
, const struct nf_conn
*ct
)
121 __be32 status
= htonl((u_int32_t
) ct
->status
);
122 NFA_PUT(skb
, CTA_STATUS
, sizeof(status
), &status
);
130 ctnetlink_dump_timeout(struct sk_buff
*skb
, const struct nf_conn
*ct
)
132 long timeout_l
= ct
->timeout
.expires
- jiffies
;
138 timeout
= htonl(timeout_l
/ HZ
);
140 NFA_PUT(skb
, CTA_TIMEOUT
, sizeof(timeout
), &timeout
);
148 ctnetlink_dump_protoinfo(struct sk_buff
*skb
, const struct nf_conn
*ct
)
150 struct nf_conntrack_l4proto
*l4proto
= nf_ct_l4proto_find_get(ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.src
.l3num
, ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
);
151 struct nfattr
*nest_proto
;
154 if (!l4proto
->to_nfattr
) {
155 nf_ct_l4proto_put(l4proto
);
159 nest_proto
= NFA_NEST(skb
, CTA_PROTOINFO
);
161 ret
= l4proto
->to_nfattr(skb
, nest_proto
, ct
);
163 nf_ct_l4proto_put(l4proto
);
165 NFA_NEST_END(skb
, nest_proto
);
170 nf_ct_l4proto_put(l4proto
);
175 ctnetlink_dump_helpinfo(struct sk_buff
*skb
, const struct nf_conn
*ct
)
177 struct nfattr
*nest_helper
;
178 const struct nf_conn_help
*help
= nfct_help(ct
);
180 if (!help
|| !help
->helper
)
183 nest_helper
= NFA_NEST(skb
, CTA_HELP
);
184 NFA_PUT(skb
, CTA_HELP_NAME
, strlen(help
->helper
->name
), help
->helper
->name
);
186 if (help
->helper
->to_nfattr
)
187 help
->helper
->to_nfattr(skb
, ct
);
189 NFA_NEST_END(skb
, nest_helper
);
197 #ifdef CONFIG_NF_CT_ACCT
199 ctnetlink_dump_counters(struct sk_buff
*skb
, const struct nf_conn
*ct
,
200 enum ip_conntrack_dir dir
)
202 enum ctattr_type type
= dir
? CTA_COUNTERS_REPLY
: CTA_COUNTERS_ORIG
;
203 struct nfattr
*nest_count
= NFA_NEST(skb
, type
);
206 tmp
= htonl(ct
->counters
[dir
].packets
);
207 NFA_PUT(skb
, CTA_COUNTERS32_PACKETS
, sizeof(u_int32_t
), &tmp
);
209 tmp
= htonl(ct
->counters
[dir
].bytes
);
210 NFA_PUT(skb
, CTA_COUNTERS32_BYTES
, sizeof(u_int32_t
), &tmp
);
212 NFA_NEST_END(skb
, nest_count
);
220 #define ctnetlink_dump_counters(a, b, c) (0)
223 #ifdef CONFIG_NF_CONNTRACK_MARK
225 ctnetlink_dump_mark(struct sk_buff
*skb
, const struct nf_conn
*ct
)
227 __be32 mark
= htonl(ct
->mark
);
229 NFA_PUT(skb
, CTA_MARK
, sizeof(u_int32_t
), &mark
);
236 #define ctnetlink_dump_mark(a, b) (0)
240 ctnetlink_dump_id(struct sk_buff
*skb
, const struct nf_conn
*ct
)
242 __be32 id
= htonl(ct
->id
);
243 NFA_PUT(skb
, CTA_ID
, sizeof(u_int32_t
), &id
);
251 ctnetlink_dump_use(struct sk_buff
*skb
, const struct nf_conn
*ct
)
253 __be32 use
= htonl(atomic_read(&ct
->ct_general
.use
));
255 NFA_PUT(skb
, CTA_USE
, sizeof(u_int32_t
), &use
);
262 #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple)
265 ctnetlink_fill_info(struct sk_buff
*skb
, u32 pid
, u32 seq
,
266 int event
, int nowait
,
267 const struct nf_conn
*ct
)
269 struct nlmsghdr
*nlh
;
270 struct nfgenmsg
*nfmsg
;
271 struct nfattr
*nest_parms
;
272 unsigned char *b
= skb_tail_pointer(skb
);
274 event
|= NFNL_SUBSYS_CTNETLINK
<< 8;
275 nlh
= NLMSG_PUT(skb
, pid
, seq
, event
, sizeof(struct nfgenmsg
));
276 nfmsg
= NLMSG_DATA(nlh
);
278 nlh
->nlmsg_flags
= (nowait
&& pid
) ? NLM_F_MULTI
: 0;
279 nfmsg
->nfgen_family
=
280 ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.src
.l3num
;
281 nfmsg
->version
= NFNETLINK_V0
;
284 nest_parms
= NFA_NEST(skb
, CTA_TUPLE_ORIG
);
285 if (ctnetlink_dump_tuples(skb
, tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
287 NFA_NEST_END(skb
, nest_parms
);
289 nest_parms
= NFA_NEST(skb
, CTA_TUPLE_REPLY
);
290 if (ctnetlink_dump_tuples(skb
, tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
292 NFA_NEST_END(skb
, nest_parms
);
294 if (ctnetlink_dump_status(skb
, ct
) < 0 ||
295 ctnetlink_dump_timeout(skb
, ct
) < 0 ||
296 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_ORIGINAL
) < 0 ||
297 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_REPLY
) < 0 ||
298 ctnetlink_dump_protoinfo(skb
, ct
) < 0 ||
299 ctnetlink_dump_helpinfo(skb
, ct
) < 0 ||
300 ctnetlink_dump_mark(skb
, ct
) < 0 ||
301 ctnetlink_dump_id(skb
, ct
) < 0 ||
302 ctnetlink_dump_use(skb
, ct
) < 0)
305 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
314 #ifdef CONFIG_NF_CONNTRACK_EVENTS
315 static int ctnetlink_conntrack_event(struct notifier_block
*this,
316 unsigned long events
, void *ptr
)
318 struct nlmsghdr
*nlh
;
319 struct nfgenmsg
*nfmsg
;
320 struct nfattr
*nest_parms
;
321 struct nf_conn
*ct
= (struct nf_conn
*)ptr
;
325 unsigned int flags
= 0, group
;
327 /* ignore our fake conntrack entry */
328 if (ct
== &nf_conntrack_untracked
)
331 if (events
& IPCT_DESTROY
) {
332 type
= IPCTNL_MSG_CT_DELETE
;
333 group
= NFNLGRP_CONNTRACK_DESTROY
;
334 } else if (events
& (IPCT_NEW
| IPCT_RELATED
)) {
335 type
= IPCTNL_MSG_CT_NEW
;
336 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
337 group
= NFNLGRP_CONNTRACK_NEW
;
338 } else if (events
& (IPCT_STATUS
| IPCT_PROTOINFO
)) {
339 type
= IPCTNL_MSG_CT_NEW
;
340 group
= NFNLGRP_CONNTRACK_UPDATE
;
344 if (!nfnetlink_has_listeners(group
))
347 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
353 type
|= NFNL_SUBSYS_CTNETLINK
<< 8;
354 nlh
= NLMSG_PUT(skb
, 0, 0, type
, sizeof(struct nfgenmsg
));
355 nfmsg
= NLMSG_DATA(nlh
);
357 nlh
->nlmsg_flags
= flags
;
358 nfmsg
->nfgen_family
= ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.src
.l3num
;
359 nfmsg
->version
= NFNETLINK_V0
;
362 nest_parms
= NFA_NEST(skb
, CTA_TUPLE_ORIG
);
363 if (ctnetlink_dump_tuples(skb
, tuple(ct
, IP_CT_DIR_ORIGINAL
)) < 0)
365 NFA_NEST_END(skb
, nest_parms
);
367 nest_parms
= NFA_NEST(skb
, CTA_TUPLE_REPLY
);
368 if (ctnetlink_dump_tuples(skb
, tuple(ct
, IP_CT_DIR_REPLY
)) < 0)
370 NFA_NEST_END(skb
, nest_parms
);
372 if (events
& IPCT_DESTROY
) {
373 if (ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_ORIGINAL
) < 0 ||
374 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_REPLY
) < 0)
377 if (ctnetlink_dump_status(skb
, ct
) < 0)
380 if (ctnetlink_dump_timeout(skb
, ct
) < 0)
383 if (events
& IPCT_PROTOINFO
384 && ctnetlink_dump_protoinfo(skb
, ct
) < 0)
387 if ((events
& IPCT_HELPER
|| nfct_help(ct
))
388 && ctnetlink_dump_helpinfo(skb
, ct
) < 0)
391 #ifdef CONFIG_NF_CONNTRACK_MARK
392 if ((events
& IPCT_MARK
|| ct
->mark
)
393 && ctnetlink_dump_mark(skb
, ct
) < 0)
397 if (events
& IPCT_COUNTER_FILLING
&&
398 (ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_ORIGINAL
) < 0 ||
399 ctnetlink_dump_counters(skb
, ct
, IP_CT_DIR_REPLY
) < 0))
403 nlh
->nlmsg_len
= skb
->tail
- b
;
404 nfnetlink_send(skb
, 0, group
, 0);
412 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
414 static int ctnetlink_done(struct netlink_callback
*cb
)
417 nf_ct_put((struct nf_conn
*)cb
->args
[1]);
421 #define L3PROTO(ct) ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num
424 ctnetlink_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
426 struct nf_conn
*ct
, *last
;
427 struct nf_conntrack_tuple_hash
*h
;
429 struct nfgenmsg
*nfmsg
= NLMSG_DATA(cb
->nlh
);
430 u_int8_t l3proto
= nfmsg
->nfgen_family
;
432 read_lock_bh(&nf_conntrack_lock
);
433 last
= (struct nf_conn
*)cb
->args
[1];
434 for (; cb
->args
[0] < nf_conntrack_htable_size
; cb
->args
[0]++) {
436 list_for_each_prev(i
, &nf_conntrack_hash
[cb
->args
[0]]) {
437 h
= (struct nf_conntrack_tuple_hash
*) i
;
438 if (NF_CT_DIRECTION(h
) != IP_CT_DIR_ORIGINAL
)
440 ct
= nf_ct_tuplehash_to_ctrack(h
);
441 /* Dump entries of a given L3 protocol number.
442 * If it is not specified, ie. l3proto == 0,
443 * then dump everything. */
444 if (l3proto
&& L3PROTO(ct
) != l3proto
)
451 if (ctnetlink_fill_info(skb
, NETLINK_CB(cb
->skb
).pid
,
455 nf_conntrack_get(&ct
->ct_general
);
456 cb
->args
[1] = (unsigned long)ct
;
459 #ifdef CONFIG_NF_CT_ACCT
460 if (NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
) ==
461 IPCTNL_MSG_CT_GET_CTRZERO
)
462 memset(&ct
->counters
, 0, sizeof(ct
->counters
));
471 read_unlock_bh(&nf_conntrack_lock
);
479 ctnetlink_parse_tuple_ip(struct nfattr
*attr
, struct nf_conntrack_tuple
*tuple
)
481 struct nfattr
*tb
[CTA_IP_MAX
];
482 struct nf_conntrack_l3proto
*l3proto
;
485 nfattr_parse_nested(tb
, CTA_IP_MAX
, attr
);
487 l3proto
= nf_ct_l3proto_find_get(tuple
->src
.l3num
);
489 if (likely(l3proto
->nfattr_to_tuple
))
490 ret
= l3proto
->nfattr_to_tuple(tb
, tuple
);
492 nf_ct_l3proto_put(l3proto
);
497 static const size_t cta_min_proto
[CTA_PROTO_MAX
] = {
498 [CTA_PROTO_NUM
-1] = sizeof(u_int8_t
),
502 ctnetlink_parse_tuple_proto(struct nfattr
*attr
,
503 struct nf_conntrack_tuple
*tuple
)
505 struct nfattr
*tb
[CTA_PROTO_MAX
];
506 struct nf_conntrack_l4proto
*l4proto
;
509 nfattr_parse_nested(tb
, CTA_PROTO_MAX
, attr
);
511 if (nfattr_bad_size(tb
, CTA_PROTO_MAX
, cta_min_proto
))
514 if (!tb
[CTA_PROTO_NUM
-1])
516 tuple
->dst
.protonum
= *(u_int8_t
*)NFA_DATA(tb
[CTA_PROTO_NUM
-1]);
518 l4proto
= nf_ct_l4proto_find_get(tuple
->src
.l3num
, tuple
->dst
.protonum
);
520 if (likely(l4proto
->nfattr_to_tuple
))
521 ret
= l4proto
->nfattr_to_tuple(tb
, tuple
);
523 nf_ct_l4proto_put(l4proto
);
529 ctnetlink_parse_tuple(struct nfattr
*cda
[], struct nf_conntrack_tuple
*tuple
,
530 enum ctattr_tuple type
, u_int8_t l3num
)
532 struct nfattr
*tb
[CTA_TUPLE_MAX
];
535 memset(tuple
, 0, sizeof(*tuple
));
537 nfattr_parse_nested(tb
, CTA_TUPLE_MAX
, cda
[type
-1]);
539 if (!tb
[CTA_TUPLE_IP
-1])
542 tuple
->src
.l3num
= l3num
;
544 err
= ctnetlink_parse_tuple_ip(tb
[CTA_TUPLE_IP
-1], tuple
);
548 if (!tb
[CTA_TUPLE_PROTO
-1])
551 err
= ctnetlink_parse_tuple_proto(tb
[CTA_TUPLE_PROTO
-1], tuple
);
555 /* orig and expect tuples get DIR_ORIGINAL */
556 if (type
== CTA_TUPLE_REPLY
)
557 tuple
->dst
.dir
= IP_CT_DIR_REPLY
;
559 tuple
->dst
.dir
= IP_CT_DIR_ORIGINAL
;
564 #ifdef CONFIG_NF_NAT_NEEDED
565 static const size_t cta_min_protonat
[CTA_PROTONAT_MAX
] = {
566 [CTA_PROTONAT_PORT_MIN
-1] = sizeof(u_int16_t
),
567 [CTA_PROTONAT_PORT_MAX
-1] = sizeof(u_int16_t
),
570 static int nfnetlink_parse_nat_proto(struct nfattr
*attr
,
571 const struct nf_conn
*ct
,
572 struct nf_nat_range
*range
)
574 struct nfattr
*tb
[CTA_PROTONAT_MAX
];
575 struct nf_nat_protocol
*npt
;
577 nfattr_parse_nested(tb
, CTA_PROTONAT_MAX
, attr
);
579 if (nfattr_bad_size(tb
, CTA_PROTONAT_MAX
, cta_min_protonat
))
582 npt
= nf_nat_proto_find_get(ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
);
584 if (!npt
->nfattr_to_range
) {
585 nf_nat_proto_put(npt
);
589 /* nfattr_to_range returns 1 if it parsed, 0 if not, neg. on error */
590 if (npt
->nfattr_to_range(tb
, range
) > 0)
591 range
->flags
|= IP_NAT_RANGE_PROTO_SPECIFIED
;
593 nf_nat_proto_put(npt
);
598 static const size_t cta_min_nat
[CTA_NAT_MAX
] = {
599 [CTA_NAT_MINIP
-1] = sizeof(u_int32_t
),
600 [CTA_NAT_MAXIP
-1] = sizeof(u_int32_t
),
604 nfnetlink_parse_nat(struct nfattr
*nat
,
605 const struct nf_conn
*ct
, struct nf_nat_range
*range
)
607 struct nfattr
*tb
[CTA_NAT_MAX
];
610 memset(range
, 0, sizeof(*range
));
612 nfattr_parse_nested(tb
, CTA_NAT_MAX
, nat
);
614 if (nfattr_bad_size(tb
, CTA_NAT_MAX
, cta_min_nat
))
617 if (tb
[CTA_NAT_MINIP
-1])
618 range
->min_ip
= *(__be32
*)NFA_DATA(tb
[CTA_NAT_MINIP
-1]);
620 if (!tb
[CTA_NAT_MAXIP
-1])
621 range
->max_ip
= range
->min_ip
;
623 range
->max_ip
= *(__be32
*)NFA_DATA(tb
[CTA_NAT_MAXIP
-1]);
626 range
->flags
|= IP_NAT_RANGE_MAP_IPS
;
628 if (!tb
[CTA_NAT_PROTO
-1])
631 err
= nfnetlink_parse_nat_proto(tb
[CTA_NAT_PROTO
-1], ct
, range
);
640 ctnetlink_parse_help(struct nfattr
*attr
, char **helper_name
)
642 struct nfattr
*tb
[CTA_HELP_MAX
];
644 nfattr_parse_nested(tb
, CTA_HELP_MAX
, attr
);
646 if (!tb
[CTA_HELP_NAME
-1])
649 *helper_name
= NFA_DATA(tb
[CTA_HELP_NAME
-1]);
654 static const size_t cta_min
[CTA_MAX
] = {
655 [CTA_STATUS
-1] = sizeof(u_int32_t
),
656 [CTA_TIMEOUT
-1] = sizeof(u_int32_t
),
657 [CTA_MARK
-1] = sizeof(u_int32_t
),
658 [CTA_USE
-1] = sizeof(u_int32_t
),
659 [CTA_ID
-1] = sizeof(u_int32_t
)
663 ctnetlink_del_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
664 struct nlmsghdr
*nlh
, struct nfattr
*cda
[])
666 struct nf_conntrack_tuple_hash
*h
;
667 struct nf_conntrack_tuple tuple
;
669 struct nfgenmsg
*nfmsg
= NLMSG_DATA(nlh
);
670 u_int8_t u3
= nfmsg
->nfgen_family
;
673 if (nfattr_bad_size(cda
, CTA_MAX
, cta_min
))
676 if (cda
[CTA_TUPLE_ORIG
-1])
677 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
678 else if (cda
[CTA_TUPLE_REPLY
-1])
679 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
681 /* Flush the whole table */
682 nf_conntrack_flush();
689 h
= nf_conntrack_find_get(&tuple
, NULL
);
693 ct
= nf_ct_tuplehash_to_ctrack(h
);
696 u_int32_t id
= ntohl(*(__be32
*)NFA_DATA(cda
[CTA_ID
-1]));
702 if (del_timer(&ct
->timeout
))
703 ct
->timeout
.function((unsigned long)ct
);
711 ctnetlink_get_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
712 struct nlmsghdr
*nlh
, struct nfattr
*cda
[])
714 struct nf_conntrack_tuple_hash
*h
;
715 struct nf_conntrack_tuple tuple
;
717 struct sk_buff
*skb2
= NULL
;
718 struct nfgenmsg
*nfmsg
= NLMSG_DATA(nlh
);
719 u_int8_t u3
= nfmsg
->nfgen_family
;
722 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
723 #ifndef CONFIG_NF_CT_ACCT
724 if (NFNL_MSG_TYPE(nlh
->nlmsg_type
) == IPCTNL_MSG_CT_GET_CTRZERO
)
727 err
= netlink_dump_start(ctnl
, skb
, nlh
, ctnetlink_dump_table
,
734 if (nfattr_bad_size(cda
, CTA_MAX
, cta_min
))
737 if (cda
[CTA_TUPLE_ORIG
-1])
738 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_ORIG
, u3
);
739 else if (cda
[CTA_TUPLE_REPLY
-1])
740 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_TUPLE_REPLY
, u3
);
747 h
= nf_conntrack_find_get(&tuple
, NULL
);
751 ct
= nf_ct_tuplehash_to_ctrack(h
);
754 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
760 err
= ctnetlink_fill_info(skb2
, NETLINK_CB(skb
).pid
, nlh
->nlmsg_seq
,
761 IPCTNL_MSG_CT_NEW
, 1, ct
);
766 err
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
779 ctnetlink_change_status(struct nf_conn
*ct
, struct nfattr
*cda
[])
782 unsigned int status
= ntohl(*(__be32
*)NFA_DATA(cda
[CTA_STATUS
-1]));
783 d
= ct
->status
^ status
;
785 if (d
& (IPS_EXPECTED
|IPS_CONFIRMED
|IPS_DYING
))
789 if (d
& IPS_SEEN_REPLY
&& !(status
& IPS_SEEN_REPLY
))
790 /* SEEN_REPLY bit can only be set */
794 if (d
& IPS_ASSURED
&& !(status
& IPS_ASSURED
))
795 /* ASSURED bit can only be set */
798 if (cda
[CTA_NAT_SRC
-1] || cda
[CTA_NAT_DST
-1]) {
799 #ifndef CONFIG_NF_NAT_NEEDED
802 struct nf_nat_range range
;
804 if (cda
[CTA_NAT_DST
-1]) {
805 if (nfnetlink_parse_nat(cda
[CTA_NAT_DST
-1], ct
,
808 if (nf_nat_initialized(ct
,
809 HOOK2MANIP(NF_IP_PRE_ROUTING
)))
811 nf_nat_setup_info(ct
, &range
, NF_IP_PRE_ROUTING
);
813 if (cda
[CTA_NAT_SRC
-1]) {
814 if (nfnetlink_parse_nat(cda
[CTA_NAT_SRC
-1], ct
,
817 if (nf_nat_initialized(ct
,
818 HOOK2MANIP(NF_IP_POST_ROUTING
)))
820 nf_nat_setup_info(ct
, &range
, NF_IP_POST_ROUTING
);
825 /* Be careful here, modifying NAT bits can screw up things,
826 * so don't let users modify them directly if they don't pass
828 ct
->status
|= status
& ~(IPS_NAT_DONE_MASK
| IPS_NAT_MASK
);
834 ctnetlink_change_helper(struct nf_conn
*ct
, struct nfattr
*cda
[])
836 struct nf_conntrack_helper
*helper
;
837 struct nf_conn_help
*help
= nfct_help(ct
);
842 /* FIXME: we need to reallocate and rehash */
846 /* don't change helper of sibling connections */
850 err
= ctnetlink_parse_help(cda
[CTA_HELP
-1], &helpname
);
854 helper
= __nf_conntrack_helper_find_byname(helpname
);
856 if (!strcmp(helpname
, ""))
864 /* we had a helper before ... */
865 nf_ct_remove_expectations(ct
);
868 /* need to zero data of old helper */
869 memset(&help
->help
, 0, sizeof(help
->help
));
873 help
->helper
= helper
;
879 ctnetlink_change_timeout(struct nf_conn
*ct
, struct nfattr
*cda
[])
881 u_int32_t timeout
= ntohl(*(__be32
*)NFA_DATA(cda
[CTA_TIMEOUT
-1]));
883 if (!del_timer(&ct
->timeout
))
886 ct
->timeout
.expires
= jiffies
+ timeout
* HZ
;
887 add_timer(&ct
->timeout
);
893 ctnetlink_change_protoinfo(struct nf_conn
*ct
, struct nfattr
*cda
[])
895 struct nfattr
*tb
[CTA_PROTOINFO_MAX
], *attr
= cda
[CTA_PROTOINFO
-1];
896 struct nf_conntrack_l4proto
*l4proto
;
897 u_int16_t npt
= ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
;
898 u_int16_t l3num
= ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.src
.l3num
;
901 nfattr_parse_nested(tb
, CTA_PROTOINFO_MAX
, attr
);
903 l4proto
= nf_ct_l4proto_find_get(l3num
, npt
);
905 if (l4proto
->from_nfattr
)
906 err
= l4proto
->from_nfattr(tb
, ct
);
907 nf_ct_l4proto_put(l4proto
);
913 ctnetlink_change_conntrack(struct nf_conn
*ct
, struct nfattr
*cda
[])
917 if (cda
[CTA_HELP
-1]) {
918 err
= ctnetlink_change_helper(ct
, cda
);
923 if (cda
[CTA_TIMEOUT
-1]) {
924 err
= ctnetlink_change_timeout(ct
, cda
);
929 if (cda
[CTA_STATUS
-1]) {
930 err
= ctnetlink_change_status(ct
, cda
);
935 if (cda
[CTA_PROTOINFO
-1]) {
936 err
= ctnetlink_change_protoinfo(ct
, cda
);
941 #if defined(CONFIG_NF_CONNTRACK_MARK)
943 ct
->mark
= ntohl(*(__be32
*)NFA_DATA(cda
[CTA_MARK
-1]));
950 ctnetlink_create_conntrack(struct nfattr
*cda
[],
951 struct nf_conntrack_tuple
*otuple
,
952 struct nf_conntrack_tuple
*rtuple
)
956 struct nf_conn_help
*help
;
958 ct
= nf_conntrack_alloc(otuple
, rtuple
);
959 if (ct
== NULL
|| IS_ERR(ct
))
962 if (!cda
[CTA_TIMEOUT
-1])
964 ct
->timeout
.expires
= ntohl(*(__be32
*)NFA_DATA(cda
[CTA_TIMEOUT
-1]));
966 ct
->timeout
.expires
= jiffies
+ ct
->timeout
.expires
* HZ
;
967 ct
->status
|= IPS_CONFIRMED
;
969 if (cda
[CTA_STATUS
-1]) {
970 err
= ctnetlink_change_status(ct
, cda
);
975 if (cda
[CTA_PROTOINFO
-1]) {
976 err
= ctnetlink_change_protoinfo(ct
, cda
);
981 #if defined(CONFIG_NF_CONNTRACK_MARK)
983 ct
->mark
= ntohl(*(__be32
*)NFA_DATA(cda
[CTA_MARK
-1]));
986 help
= nfct_help(ct
);
988 help
->helper
= nf_ct_helper_find_get(rtuple
);
990 add_timer(&ct
->timeout
);
991 nf_conntrack_hash_insert(ct
);
993 if (help
&& help
->helper
)
994 nf_ct_helper_put(help
->helper
);
999 nf_conntrack_free(ct
);
1004 ctnetlink_new_conntrack(struct sock
*ctnl
, struct sk_buff
*skb
,
1005 struct nlmsghdr
*nlh
, struct nfattr
*cda
[])
1007 struct nf_conntrack_tuple otuple
, rtuple
;
1008 struct nf_conntrack_tuple_hash
*h
= NULL
;
1009 struct nfgenmsg
*nfmsg
= NLMSG_DATA(nlh
);
1010 u_int8_t u3
= nfmsg
->nfgen_family
;
1013 if (nfattr_bad_size(cda
, CTA_MAX
, cta_min
))
1016 if (cda
[CTA_TUPLE_ORIG
-1]) {
1017 err
= ctnetlink_parse_tuple(cda
, &otuple
, CTA_TUPLE_ORIG
, u3
);
1022 if (cda
[CTA_TUPLE_REPLY
-1]) {
1023 err
= ctnetlink_parse_tuple(cda
, &rtuple
, CTA_TUPLE_REPLY
, u3
);
1028 write_lock_bh(&nf_conntrack_lock
);
1029 if (cda
[CTA_TUPLE_ORIG
-1])
1030 h
= __nf_conntrack_find(&otuple
, NULL
);
1031 else if (cda
[CTA_TUPLE_REPLY
-1])
1032 h
= __nf_conntrack_find(&rtuple
, NULL
);
1035 write_unlock_bh(&nf_conntrack_lock
);
1037 if (nlh
->nlmsg_flags
& NLM_F_CREATE
)
1038 err
= ctnetlink_create_conntrack(cda
, &otuple
, &rtuple
);
1041 /* implicit 'else' */
1043 /* we only allow nat config for new conntracks */
1044 if (cda
[CTA_NAT_SRC
-1] || cda
[CTA_NAT_DST
-1]) {
1049 /* We manipulate the conntrack inside the global conntrack table lock,
1050 * so there's no need to increase the refcount */
1052 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
))
1053 err
= ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h
), cda
);
1056 write_unlock_bh(&nf_conntrack_lock
);
1060 /***********************************************************************
1062 ***********************************************************************/
1065 ctnetlink_exp_dump_tuple(struct sk_buff
*skb
,
1066 const struct nf_conntrack_tuple
*tuple
,
1067 enum ctattr_expect type
)
1069 struct nfattr
*nest_parms
= NFA_NEST(skb
, type
);
1071 if (ctnetlink_dump_tuples(skb
, tuple
) < 0)
1072 goto nfattr_failure
;
1074 NFA_NEST_END(skb
, nest_parms
);
1083 ctnetlink_exp_dump_mask(struct sk_buff
*skb
,
1084 const struct nf_conntrack_tuple
*tuple
,
1085 const struct nf_conntrack_tuple
*mask
)
1088 struct nf_conntrack_l3proto
*l3proto
;
1089 struct nf_conntrack_l4proto
*l4proto
;
1090 struct nfattr
*nest_parms
= NFA_NEST(skb
, CTA_EXPECT_MASK
);
1092 l3proto
= nf_ct_l3proto_find_get(tuple
->src
.l3num
);
1093 ret
= ctnetlink_dump_tuples_ip(skb
, mask
, l3proto
);
1094 nf_ct_l3proto_put(l3proto
);
1096 if (unlikely(ret
< 0))
1097 goto nfattr_failure
;
1099 l4proto
= nf_ct_l4proto_find_get(tuple
->src
.l3num
, tuple
->dst
.protonum
);
1100 ret
= ctnetlink_dump_tuples_proto(skb
, mask
, l4proto
);
1101 nf_ct_l4proto_put(l4proto
);
1102 if (unlikely(ret
< 0))
1103 goto nfattr_failure
;
1105 NFA_NEST_END(skb
, nest_parms
);
1114 ctnetlink_exp_dump_expect(struct sk_buff
*skb
,
1115 const struct nf_conntrack_expect
*exp
)
1117 struct nf_conn
*master
= exp
->master
;
1118 __be32 timeout
= htonl((exp
->timeout
.expires
- jiffies
) / HZ
);
1119 __be32 id
= htonl(exp
->id
);
1121 if (ctnetlink_exp_dump_tuple(skb
, &exp
->tuple
, CTA_EXPECT_TUPLE
) < 0)
1122 goto nfattr_failure
;
1123 if (ctnetlink_exp_dump_mask(skb
, &exp
->tuple
, &exp
->mask
) < 0)
1124 goto nfattr_failure
;
1125 if (ctnetlink_exp_dump_tuple(skb
,
1126 &master
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
1127 CTA_EXPECT_MASTER
) < 0)
1128 goto nfattr_failure
;
1130 NFA_PUT(skb
, CTA_EXPECT_TIMEOUT
, sizeof(timeout
), &timeout
);
1131 NFA_PUT(skb
, CTA_EXPECT_ID
, sizeof(u_int32_t
), &id
);
1140 ctnetlink_exp_fill_info(struct sk_buff
*skb
, u32 pid
, u32 seq
,
1143 const struct nf_conntrack_expect
*exp
)
1145 struct nlmsghdr
*nlh
;
1146 struct nfgenmsg
*nfmsg
;
1147 unsigned char *b
= skb_tail_pointer(skb
);
1149 event
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
1150 nlh
= NLMSG_PUT(skb
, pid
, seq
, event
, sizeof(struct nfgenmsg
));
1151 nfmsg
= NLMSG_DATA(nlh
);
1153 nlh
->nlmsg_flags
= (nowait
&& pid
) ? NLM_F_MULTI
: 0;
1154 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
1155 nfmsg
->version
= NFNETLINK_V0
;
1158 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
1159 goto nfattr_failure
;
1161 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
1170 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1171 static int ctnetlink_expect_event(struct notifier_block
*this,
1172 unsigned long events
, void *ptr
)
1174 struct nlmsghdr
*nlh
;
1175 struct nfgenmsg
*nfmsg
;
1176 struct nf_conntrack_expect
*exp
= (struct nf_conntrack_expect
*)ptr
;
1177 struct sk_buff
*skb
;
1182 if (events
& IPEXP_NEW
) {
1183 type
= IPCTNL_MSG_EXP_NEW
;
1184 flags
= NLM_F_CREATE
|NLM_F_EXCL
;
1188 if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW
))
1191 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
1197 type
|= NFNL_SUBSYS_CTNETLINK_EXP
<< 8;
1198 nlh
= NLMSG_PUT(skb
, 0, 0, type
, sizeof(struct nfgenmsg
));
1199 nfmsg
= NLMSG_DATA(nlh
);
1201 nlh
->nlmsg_flags
= flags
;
1202 nfmsg
->nfgen_family
= exp
->tuple
.src
.l3num
;
1203 nfmsg
->version
= NFNETLINK_V0
;
1206 if (ctnetlink_exp_dump_expect(skb
, exp
) < 0)
1207 goto nfattr_failure
;
1209 nlh
->nlmsg_len
= skb
->tail
- b
;
1210 nfnetlink_send(skb
, 0, NFNLGRP_CONNTRACK_EXP_NEW
, 0);
1221 ctnetlink_exp_dump_table(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1223 struct nf_conntrack_expect
*exp
= NULL
;
1224 struct list_head
*i
;
1225 u_int32_t
*id
= (u_int32_t
*) &cb
->args
[0];
1226 struct nfgenmsg
*nfmsg
= NLMSG_DATA(cb
->nlh
);
1227 u_int8_t l3proto
= nfmsg
->nfgen_family
;
1229 read_lock_bh(&nf_conntrack_lock
);
1230 list_for_each_prev(i
, &nf_conntrack_expect_list
) {
1231 exp
= (struct nf_conntrack_expect
*) i
;
1232 if (l3proto
&& exp
->tuple
.src
.l3num
!= l3proto
)
1236 if (ctnetlink_exp_fill_info(skb
, NETLINK_CB(cb
->skb
).pid
,
1244 read_unlock_bh(&nf_conntrack_lock
);
1249 static const size_t cta_min_exp
[CTA_EXPECT_MAX
] = {
1250 [CTA_EXPECT_TIMEOUT
-1] = sizeof(u_int32_t
),
1251 [CTA_EXPECT_ID
-1] = sizeof(u_int32_t
)
1255 ctnetlink_get_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
1256 struct nlmsghdr
*nlh
, struct nfattr
*cda
[])
1258 struct nf_conntrack_tuple tuple
;
1259 struct nf_conntrack_expect
*exp
;
1260 struct sk_buff
*skb2
;
1261 struct nfgenmsg
*nfmsg
= NLMSG_DATA(nlh
);
1262 u_int8_t u3
= nfmsg
->nfgen_family
;
1265 if (nfattr_bad_size(cda
, CTA_EXPECT_MAX
, cta_min_exp
))
1268 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1269 err
= netlink_dump_start(ctnl
, skb
, nlh
,
1270 ctnetlink_exp_dump_table
,
1277 if (cda
[CTA_EXPECT_MASTER
-1])
1278 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_MASTER
, u3
);
1285 exp
= nf_conntrack_expect_find_get(&tuple
);
1289 if (cda
[CTA_EXPECT_ID
-1]) {
1290 __be32 id
= *(__be32
*)NFA_DATA(cda
[CTA_EXPECT_ID
-1]);
1291 if (exp
->id
!= ntohl(id
)) {
1292 nf_conntrack_expect_put(exp
);
1298 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
1302 err
= ctnetlink_exp_fill_info(skb2
, NETLINK_CB(skb
).pid
,
1303 nlh
->nlmsg_seq
, IPCTNL_MSG_EXP_NEW
,
1308 nf_conntrack_expect_put(exp
);
1310 return netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
1315 nf_conntrack_expect_put(exp
);
1320 ctnetlink_del_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
1321 struct nlmsghdr
*nlh
, struct nfattr
*cda
[])
1323 struct nf_conntrack_expect
*exp
, *tmp
;
1324 struct nf_conntrack_tuple tuple
;
1325 struct nf_conntrack_helper
*h
;
1326 struct nfgenmsg
*nfmsg
= NLMSG_DATA(nlh
);
1327 u_int8_t u3
= nfmsg
->nfgen_family
;
1330 if (nfattr_bad_size(cda
, CTA_EXPECT_MAX
, cta_min_exp
))
1333 if (cda
[CTA_EXPECT_TUPLE
-1]) {
1334 /* delete a single expect by tuple */
1335 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
1339 /* bump usage count to 2 */
1340 exp
= nf_conntrack_expect_find_get(&tuple
);
1344 if (cda
[CTA_EXPECT_ID
-1]) {
1345 __be32 id
= *(__be32
*)NFA_DATA(cda
[CTA_EXPECT_ID
-1]);
1346 if (exp
->id
!= ntohl(id
)) {
1347 nf_conntrack_expect_put(exp
);
1352 /* after list removal, usage count == 1 */
1353 nf_conntrack_unexpect_related(exp
);
1354 /* have to put what we 'get' above.
1355 * after this line usage count == 0 */
1356 nf_conntrack_expect_put(exp
);
1357 } else if (cda
[CTA_EXPECT_HELP_NAME
-1]) {
1358 char *name
= NFA_DATA(cda
[CTA_EXPECT_HELP_NAME
-1]);
1360 /* delete all expectations for this helper */
1361 write_lock_bh(&nf_conntrack_lock
);
1362 h
= __nf_conntrack_helper_find_byname(name
);
1364 write_unlock_bh(&nf_conntrack_lock
);
1367 list_for_each_entry_safe(exp
, tmp
, &nf_conntrack_expect_list
,
1369 struct nf_conn_help
*m_help
= nfct_help(exp
->master
);
1370 if (m_help
->helper
== h
1371 && del_timer(&exp
->timeout
)) {
1372 nf_ct_unlink_expect(exp
);
1373 nf_conntrack_expect_put(exp
);
1376 write_unlock_bh(&nf_conntrack_lock
);
1378 /* This basically means we have to flush everything*/
1379 write_lock_bh(&nf_conntrack_lock
);
1380 list_for_each_entry_safe(exp
, tmp
, &nf_conntrack_expect_list
,
1382 if (del_timer(&exp
->timeout
)) {
1383 nf_ct_unlink_expect(exp
);
1384 nf_conntrack_expect_put(exp
);
1387 write_unlock_bh(&nf_conntrack_lock
);
1393 ctnetlink_change_expect(struct nf_conntrack_expect
*x
, struct nfattr
*cda
[])
1399 ctnetlink_create_expect(struct nfattr
*cda
[], u_int8_t u3
)
1401 struct nf_conntrack_tuple tuple
, mask
, master_tuple
;
1402 struct nf_conntrack_tuple_hash
*h
= NULL
;
1403 struct nf_conntrack_expect
*exp
;
1405 struct nf_conn_help
*help
;
1408 /* caller guarantees that those three CTA_EXPECT_* exist */
1409 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
1412 err
= ctnetlink_parse_tuple(cda
, &mask
, CTA_EXPECT_MASK
, u3
);
1415 err
= ctnetlink_parse_tuple(cda
, &master_tuple
, CTA_EXPECT_MASTER
, u3
);
1419 /* Look for master conntrack of this expectation */
1420 h
= nf_conntrack_find_get(&master_tuple
, NULL
);
1423 ct
= nf_ct_tuplehash_to_ctrack(h
);
1424 help
= nfct_help(ct
);
1426 if (!help
|| !help
->helper
) {
1427 /* such conntrack hasn't got any helper, abort */
1432 exp
= nf_conntrack_expect_alloc(ct
);
1438 exp
->expectfn
= NULL
;
1442 memcpy(&exp
->tuple
, &tuple
, sizeof(struct nf_conntrack_tuple
));
1443 memcpy(&exp
->mask
, &mask
, sizeof(struct nf_conntrack_tuple
));
1445 err
= nf_conntrack_expect_related(exp
);
1446 nf_conntrack_expect_put(exp
);
1449 nf_ct_put(nf_ct_tuplehash_to_ctrack(h
));
1454 ctnetlink_new_expect(struct sock
*ctnl
, struct sk_buff
*skb
,
1455 struct nlmsghdr
*nlh
, struct nfattr
*cda
[])
1457 struct nf_conntrack_tuple tuple
;
1458 struct nf_conntrack_expect
*exp
;
1459 struct nfgenmsg
*nfmsg
= NLMSG_DATA(nlh
);
1460 u_int8_t u3
= nfmsg
->nfgen_family
;
1463 if (nfattr_bad_size(cda
, CTA_EXPECT_MAX
, cta_min_exp
))
1466 if (!cda
[CTA_EXPECT_TUPLE
-1]
1467 || !cda
[CTA_EXPECT_MASK
-1]
1468 || !cda
[CTA_EXPECT_MASTER
-1])
1471 err
= ctnetlink_parse_tuple(cda
, &tuple
, CTA_EXPECT_TUPLE
, u3
);
1475 write_lock_bh(&nf_conntrack_lock
);
1476 exp
= __nf_conntrack_expect_find(&tuple
);
1479 write_unlock_bh(&nf_conntrack_lock
);
1481 if (nlh
->nlmsg_flags
& NLM_F_CREATE
)
1482 err
= ctnetlink_create_expect(cda
, u3
);
1487 if (!(nlh
->nlmsg_flags
& NLM_F_EXCL
))
1488 err
= ctnetlink_change_expect(exp
, cda
);
1489 write_unlock_bh(&nf_conntrack_lock
);
1494 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1495 static struct notifier_block ctnl_notifier
= {
1496 .notifier_call
= ctnetlink_conntrack_event
,
1499 static struct notifier_block ctnl_notifier_exp
= {
1500 .notifier_call
= ctnetlink_expect_event
,
1504 static struct nfnl_callback ctnl_cb
[IPCTNL_MSG_MAX
] = {
1505 [IPCTNL_MSG_CT_NEW
] = { .call
= ctnetlink_new_conntrack
,
1506 .attr_count
= CTA_MAX
, },
1507 [IPCTNL_MSG_CT_GET
] = { .call
= ctnetlink_get_conntrack
,
1508 .attr_count
= CTA_MAX
, },
1509 [IPCTNL_MSG_CT_DELETE
] = { .call
= ctnetlink_del_conntrack
,
1510 .attr_count
= CTA_MAX
, },
1511 [IPCTNL_MSG_CT_GET_CTRZERO
] = { .call
= ctnetlink_get_conntrack
,
1512 .attr_count
= CTA_MAX
, },
1515 static struct nfnl_callback ctnl_exp_cb
[IPCTNL_MSG_EXP_MAX
] = {
1516 [IPCTNL_MSG_EXP_GET
] = { .call
= ctnetlink_get_expect
,
1517 .attr_count
= CTA_EXPECT_MAX
, },
1518 [IPCTNL_MSG_EXP_NEW
] = { .call
= ctnetlink_new_expect
,
1519 .attr_count
= CTA_EXPECT_MAX
, },
1520 [IPCTNL_MSG_EXP_DELETE
] = { .call
= ctnetlink_del_expect
,
1521 .attr_count
= CTA_EXPECT_MAX
, },
1524 static struct nfnetlink_subsystem ctnl_subsys
= {
1525 .name
= "conntrack",
1526 .subsys_id
= NFNL_SUBSYS_CTNETLINK
,
1527 .cb_count
= IPCTNL_MSG_MAX
,
1531 static struct nfnetlink_subsystem ctnl_exp_subsys
= {
1532 .name
= "conntrack_expect",
1533 .subsys_id
= NFNL_SUBSYS_CTNETLINK_EXP
,
1534 .cb_count
= IPCTNL_MSG_EXP_MAX
,
1538 MODULE_ALIAS("ip_conntrack_netlink");
1539 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK
);
1540 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP
);
1542 static int __init
ctnetlink_init(void)
1546 printk("ctnetlink v%s: registering with nfnetlink.\n", version
);
1547 ret
= nfnetlink_subsys_register(&ctnl_subsys
);
1549 printk("ctnetlink_init: cannot register with nfnetlink.\n");
1553 ret
= nfnetlink_subsys_register(&ctnl_exp_subsys
);
1555 printk("ctnetlink_init: cannot register exp with nfnetlink.\n");
1556 goto err_unreg_subsys
;
1559 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1560 ret
= nf_conntrack_register_notifier(&ctnl_notifier
);
1562 printk("ctnetlink_init: cannot register notifier.\n");
1563 goto err_unreg_exp_subsys
;
1566 ret
= nf_conntrack_expect_register_notifier(&ctnl_notifier_exp
);
1568 printk("ctnetlink_init: cannot expect register notifier.\n");
1569 goto err_unreg_notifier
;
1575 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1577 nf_conntrack_unregister_notifier(&ctnl_notifier
);
1578 err_unreg_exp_subsys
:
1579 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
1582 nfnetlink_subsys_unregister(&ctnl_subsys
);
1587 static void __exit
ctnetlink_exit(void)
1589 printk("ctnetlink: unregistering from nfnetlink.\n");
1591 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1592 nf_conntrack_expect_unregister_notifier(&ctnl_notifier_exp
);
1593 nf_conntrack_unregister_notifier(&ctnl_notifier
);
1596 nfnetlink_subsys_unregister(&ctnl_exp_subsys
);
1597 nfnetlink_subsys_unregister(&ctnl_subsys
);
1601 module_init(ctnetlink_init
);
1602 module_exit(ctnetlink_exit
);