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";
61 static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
62 const struct nf_conntrack_tuple *tuple,
63 struct nf_conntrack_l4proto *l4proto)
66 struct nlattr *nest_parms;
68 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
71 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
74 if (likely(l4proto->tuple_to_nlattr))
75 ret = l4proto->tuple_to_nlattr(skb, tuple);
77 nla_nest_end(skb, nest_parms);
85 static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
86 const struct nf_conntrack_tuple *tuple,
87 struct nf_conntrack_l3proto *l3proto)
90 struct nlattr *nest_parms;
92 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
96 if (likely(l3proto->tuple_to_nlattr))
97 ret = l3proto->tuple_to_nlattr(skb, tuple);
99 nla_nest_end(skb, nest_parms);
107 static int ctnetlink_dump_tuples(struct sk_buff *skb,
108 const struct nf_conntrack_tuple *tuple)
111 struct nf_conntrack_l3proto *l3proto;
112 struct nf_conntrack_l4proto *l4proto;
115 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
116 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
119 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
120 tuple->dst.protonum);
121 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
127 static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
128 const struct nf_conntrack_zone *zone, int dir)
130 if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
132 if (nla_put_be16(skb, attrtype, htons(zone->id)))
133 goto nla_put_failure;
140 static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
142 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
143 goto nla_put_failure;
150 static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
152 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
157 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
158 goto nla_put_failure;
165 static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
167 struct nf_conntrack_l4proto *l4proto;
168 struct nlattr *nest_proto;
171 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
172 if (!l4proto->to_nlattr)
175 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
177 goto nla_put_failure;
179 ret = l4proto->to_nlattr(skb, nest_proto, ct);
181 nla_nest_end(skb, nest_proto);
189 static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
190 const struct nf_conn *ct)
192 struct nlattr *nest_helper;
193 const struct nf_conn_help *help = nfct_help(ct);
194 struct nf_conntrack_helper *helper;
199 helper = rcu_dereference(help->helper);
203 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
205 goto nla_put_failure;
206 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
207 goto nla_put_failure;
209 if (helper->to_nlattr)
210 helper->to_nlattr(skb, ct);
212 nla_nest_end(skb, nest_helper);
221 dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
222 enum ip_conntrack_dir dir, int type)
224 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
225 struct nf_conn_counter *counter = acct->counter;
226 struct nlattr *nest_count;
229 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
230 pkts = atomic64_xchg(&counter[dir].packets, 0);
231 bytes = atomic64_xchg(&counter[dir].bytes, 0);
233 pkts = atomic64_read(&counter[dir].packets);
234 bytes = atomic64_read(&counter[dir].bytes);
237 nest_count = nla_nest_start(skb, attr | NLA_F_NESTED);
239 goto nla_put_failure;
241 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
243 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
245 goto nla_put_failure;
247 nla_nest_end(skb, nest_count);
256 ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
258 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
263 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
265 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
272 ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
274 struct nlattr *nest_count;
275 const struct nf_conn_tstamp *tstamp;
277 tstamp = nf_conn_tstamp_find(ct);
281 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
283 goto nla_put_failure;
285 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
286 CTA_TIMESTAMP_PAD) ||
287 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
288 cpu_to_be64(tstamp->stop),
290 goto nla_put_failure;
291 nla_nest_end(skb, nest_count);
299 #ifdef CONFIG_NF_CONNTRACK_MARK
300 static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
302 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
303 goto nla_put_failure;
310 #define ctnetlink_dump_mark(a, b) (0)
313 #ifdef CONFIG_NF_CONNTRACK_SECMARK
314 static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
316 struct nlattr *nest_secctx;
320 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
325 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
327 goto nla_put_failure;
329 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
330 goto nla_put_failure;
331 nla_nest_end(skb, nest_secctx);
335 security_release_secctx(secctx, len);
339 #define ctnetlink_dump_secctx(a, b) (0)
342 #ifdef CONFIG_NF_CONNTRACK_LABELS
343 static inline int ctnetlink_label_size(const struct nf_conn *ct)
345 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
349 return nla_total_size(sizeof(labels->bits));
353 ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
355 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
363 if (labels->bits[i] != 0)
364 return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
367 } while (i < ARRAY_SIZE(labels->bits));
372 #define ctnetlink_dump_labels(a, b) (0)
373 #define ctnetlink_label_size(a) (0)
376 #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
378 static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
380 struct nlattr *nest_parms;
382 if (!(ct->status & IPS_EXPECTED))
385 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
387 goto nla_put_failure;
388 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
389 goto nla_put_failure;
390 nla_nest_end(skb, nest_parms);
399 dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
401 struct nlattr *nest_parms;
403 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
405 goto nla_put_failure;
407 if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
408 htonl(seq->correction_pos)) ||
409 nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
410 htonl(seq->offset_before)) ||
411 nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
412 htonl(seq->offset_after)))
413 goto nla_put_failure;
415 nla_nest_end(skb, nest_parms);
423 static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb,
424 const struct nf_conn *ct)
426 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
427 struct nf_ct_seqadj *seq;
429 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
432 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
433 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
436 seq = &seqadj->seq[IP_CT_DIR_REPLY];
437 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
443 static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
445 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
446 goto nla_put_failure;
453 static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
455 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
456 goto nla_put_failure;
464 ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
467 const struct nf_conntrack_zone *zone;
468 struct nlmsghdr *nlh;
469 struct nfgenmsg *nfmsg;
470 struct nlattr *nest_parms;
471 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
473 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
474 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
478 nfmsg = nlmsg_data(nlh);
479 nfmsg->nfgen_family = nf_ct_l3num(ct);
480 nfmsg->version = NFNETLINK_V0;
483 zone = nf_ct_zone(ct);
485 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
487 goto nla_put_failure;
488 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
489 goto nla_put_failure;
490 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
491 NF_CT_ZONE_DIR_ORIG) < 0)
492 goto nla_put_failure;
493 nla_nest_end(skb, nest_parms);
495 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
497 goto nla_put_failure;
498 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
499 goto nla_put_failure;
500 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
501 NF_CT_ZONE_DIR_REPL) < 0)
502 goto nla_put_failure;
503 nla_nest_end(skb, nest_parms);
505 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
506 NF_CT_DEFAULT_ZONE_DIR) < 0)
507 goto nla_put_failure;
509 if (ctnetlink_dump_status(skb, ct) < 0 ||
510 ctnetlink_dump_timeout(skb, ct) < 0 ||
511 ctnetlink_dump_acct(skb, ct, type) < 0 ||
512 ctnetlink_dump_timestamp(skb, ct) < 0 ||
513 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
514 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
515 ctnetlink_dump_mark(skb, ct) < 0 ||
516 ctnetlink_dump_secctx(skb, ct) < 0 ||
517 ctnetlink_dump_labels(skb, ct) < 0 ||
518 ctnetlink_dump_id(skb, ct) < 0 ||
519 ctnetlink_dump_use(skb, ct) < 0 ||
520 ctnetlink_dump_master(skb, ct) < 0 ||
521 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
522 goto nla_put_failure;
529 nlmsg_cancel(skb, nlh);
533 static inline size_t ctnetlink_proto_size(const struct nf_conn *ct)
535 struct nf_conntrack_l3proto *l3proto;
536 struct nf_conntrack_l4proto *l4proto;
540 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
541 len += l3proto->nla_size;
543 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
544 len += l4proto->nla_size;
550 static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
552 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
554 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
555 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
556 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
560 static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
562 #ifdef CONFIG_NF_CONNTRACK_SECMARK
565 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
569 return nla_total_size(0) /* CTA_SECCTX */
570 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
576 static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
578 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
579 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
581 return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
587 #ifdef CONFIG_NF_CONNTRACK_EVENTS
588 static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
590 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
591 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
592 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
593 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
594 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
595 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
596 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
597 + ctnetlink_acct_size(ct)
598 + ctnetlink_timestamp_size(ct)
599 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
600 + nla_total_size(0) /* CTA_PROTOINFO */
601 + nla_total_size(0) /* CTA_HELP */
602 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
603 + ctnetlink_secctx_size(ct)
604 #ifdef CONFIG_NF_NAT_NEEDED
605 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
606 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
608 #ifdef CONFIG_NF_CONNTRACK_MARK
609 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
611 #ifdef CONFIG_NF_CONNTRACK_ZONES
612 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
614 + ctnetlink_proto_size(ct)
615 + ctnetlink_label_size(ct)
620 ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
622 const struct nf_conntrack_zone *zone;
624 struct nlmsghdr *nlh;
625 struct nfgenmsg *nfmsg;
626 struct nlattr *nest_parms;
627 struct nf_conn *ct = item->ct;
630 unsigned int flags = 0, group;
633 /* ignore our fake conntrack entry */
634 if (nf_ct_is_untracked(ct))
637 if (events & (1 << IPCT_DESTROY)) {
638 type = IPCTNL_MSG_CT_DELETE;
639 group = NFNLGRP_CONNTRACK_DESTROY;
640 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
641 type = IPCTNL_MSG_CT_NEW;
642 flags = NLM_F_CREATE|NLM_F_EXCL;
643 group = NFNLGRP_CONNTRACK_NEW;
645 type = IPCTNL_MSG_CT_NEW;
646 group = NFNLGRP_CONNTRACK_UPDATE;
651 if (!item->report && !nfnetlink_has_listeners(net, group))
654 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
658 type |= NFNL_SUBSYS_CTNETLINK << 8;
659 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
663 nfmsg = nlmsg_data(nlh);
664 nfmsg->nfgen_family = nf_ct_l3num(ct);
665 nfmsg->version = NFNETLINK_V0;
669 zone = nf_ct_zone(ct);
671 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
673 goto nla_put_failure;
674 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
675 goto nla_put_failure;
676 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
677 NF_CT_ZONE_DIR_ORIG) < 0)
678 goto nla_put_failure;
679 nla_nest_end(skb, nest_parms);
681 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
683 goto nla_put_failure;
684 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
685 goto nla_put_failure;
686 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
687 NF_CT_ZONE_DIR_REPL) < 0)
688 goto nla_put_failure;
689 nla_nest_end(skb, nest_parms);
691 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
692 NF_CT_DEFAULT_ZONE_DIR) < 0)
693 goto nla_put_failure;
695 if (ctnetlink_dump_id(skb, ct) < 0)
696 goto nla_put_failure;
698 if (ctnetlink_dump_status(skb, ct) < 0)
699 goto nla_put_failure;
701 if (events & (1 << IPCT_DESTROY)) {
702 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
703 ctnetlink_dump_timestamp(skb, ct) < 0)
704 goto nla_put_failure;
706 if (ctnetlink_dump_timeout(skb, ct) < 0)
707 goto nla_put_failure;
709 if (events & (1 << IPCT_PROTOINFO)
710 && ctnetlink_dump_protoinfo(skb, ct) < 0)
711 goto nla_put_failure;
713 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
714 && ctnetlink_dump_helpinfo(skb, ct) < 0)
715 goto nla_put_failure;
717 #ifdef CONFIG_NF_CONNTRACK_SECMARK
718 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
719 && ctnetlink_dump_secctx(skb, ct) < 0)
720 goto nla_put_failure;
722 if (events & (1 << IPCT_LABEL) &&
723 ctnetlink_dump_labels(skb, ct) < 0)
724 goto nla_put_failure;
726 if (events & (1 << IPCT_RELATED) &&
727 ctnetlink_dump_master(skb, ct) < 0)
728 goto nla_put_failure;
730 if (events & (1 << IPCT_SEQADJ) &&
731 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
732 goto nla_put_failure;
735 #ifdef CONFIG_NF_CONNTRACK_MARK
736 if ((events & (1 << IPCT_MARK) || ct->mark)
737 && ctnetlink_dump_mark(skb, ct) < 0)
738 goto nla_put_failure;
743 err = nfnetlink_send(skb, net, item->portid, group, item->report,
745 if (err == -ENOBUFS || err == -EAGAIN)
752 nlmsg_cancel(skb, nlh);
756 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
761 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
763 static int ctnetlink_done(struct netlink_callback *cb)
766 nf_ct_put((struct nf_conn *)cb->args[1]);
771 struct ctnetlink_filter {
778 static struct ctnetlink_filter *
779 ctnetlink_alloc_filter(const struct nlattr * const cda[])
781 #ifdef CONFIG_NF_CONNTRACK_MARK
782 struct ctnetlink_filter *filter;
784 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
786 return ERR_PTR(-ENOMEM);
788 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
789 filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
793 return ERR_PTR(-EOPNOTSUPP);
797 static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
799 struct ctnetlink_filter *filter = data;
804 #ifdef CONFIG_NF_CONNTRACK_MARK
805 if ((ct->mark & filter->mark.mask) == filter->mark.val)
813 ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
815 struct net *net = sock_net(skb->sk);
816 struct nf_conn *ct, *last;
817 struct nf_conntrack_tuple_hash *h;
818 struct hlist_nulls_node *n;
819 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
820 u_int8_t l3proto = nfmsg->nfgen_family;
824 last = (struct nf_conn *)cb->args[1];
827 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
829 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
830 nf_conntrack_lock(lockp);
831 if (cb->args[0] >= nf_conntrack_htable_size) {
835 hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
837 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
839 ct = nf_ct_tuplehash_to_ctrack(h);
840 if (!net_eq(net, nf_ct_net(ct)))
843 /* Dump entries of a given L3 protocol number.
844 * If it is not specified, ie. l3proto == 0,
845 * then dump everything. */
846 if (l3proto && nf_ct_l3num(ct) != l3proto)
853 if (!ctnetlink_filter_match(ct, cb->data))
858 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
860 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
864 nf_conntrack_get(&ct->ct_general);
865 cb->args[1] = (unsigned long)ct;
884 static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
885 struct nf_conntrack_tuple *tuple)
887 struct nlattr *tb[CTA_IP_MAX+1];
888 struct nf_conntrack_l3proto *l3proto;
891 ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
896 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
898 if (likely(l3proto->nlattr_to_tuple)) {
899 ret = nla_validate_nested(attr, CTA_IP_MAX,
900 l3proto->nla_policy);
902 ret = l3proto->nlattr_to_tuple(tb, tuple);
910 static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
911 [CTA_PROTO_NUM] = { .type = NLA_U8 },
914 static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
915 struct nf_conntrack_tuple *tuple)
917 struct nlattr *tb[CTA_PROTO_MAX+1];
918 struct nf_conntrack_l4proto *l4proto;
921 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
925 if (!tb[CTA_PROTO_NUM])
927 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
930 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
932 if (likely(l4proto->nlattr_to_tuple)) {
933 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
934 l4proto->nla_policy);
936 ret = l4proto->nlattr_to_tuple(tb, tuple);
945 ctnetlink_parse_zone(const struct nlattr *attr,
946 struct nf_conntrack_zone *zone)
948 nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
949 NF_CT_DEFAULT_ZONE_DIR, 0);
950 #ifdef CONFIG_NF_CONNTRACK_ZONES
952 zone->id = ntohs(nla_get_be16(attr));
961 ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
962 struct nf_conntrack_zone *zone)
966 if (zone->id != NF_CT_DEFAULT_ZONE_ID)
969 ret = ctnetlink_parse_zone(attr, zone);
973 if (type == CTA_TUPLE_REPLY)
974 zone->dir = NF_CT_ZONE_DIR_REPL;
976 zone->dir = NF_CT_ZONE_DIR_ORIG;
981 static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
982 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
983 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
984 [CTA_TUPLE_ZONE] = { .type = NLA_U16 },
988 ctnetlink_parse_tuple(const struct nlattr * const cda[],
989 struct nf_conntrack_tuple *tuple,
990 enum ctattr_type type, u_int8_t l3num,
991 struct nf_conntrack_zone *zone)
993 struct nlattr *tb[CTA_TUPLE_MAX+1];
996 memset(tuple, 0, sizeof(*tuple));
998 err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
1002 if (!tb[CTA_TUPLE_IP])
1005 tuple->src.l3num = l3num;
1007 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
1011 if (!tb[CTA_TUPLE_PROTO])
1014 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
1018 if (tb[CTA_TUPLE_ZONE]) {
1022 err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
1028 /* orig and expect tuples get DIR_ORIGINAL */
1029 if (type == CTA_TUPLE_REPLY)
1030 tuple->dst.dir = IP_CT_DIR_REPLY;
1032 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
1037 static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
1038 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
1039 .len = NF_CT_HELPER_NAME_LEN - 1 },
1042 static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
1043 struct nlattr **helpinfo)
1046 struct nlattr *tb[CTA_HELP_MAX+1];
1048 err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
1052 if (!tb[CTA_HELP_NAME])
1055 *helper_name = nla_data(tb[CTA_HELP_NAME]);
1057 if (tb[CTA_HELP_INFO])
1058 *helpinfo = tb[CTA_HELP_INFO];
1063 static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
1064 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
1065 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
1066 [CTA_STATUS] = { .type = NLA_U32 },
1067 [CTA_PROTOINFO] = { .type = NLA_NESTED },
1068 [CTA_HELP] = { .type = NLA_NESTED },
1069 [CTA_NAT_SRC] = { .type = NLA_NESTED },
1070 [CTA_TIMEOUT] = { .type = NLA_U32 },
1071 [CTA_MARK] = { .type = NLA_U32 },
1072 [CTA_ID] = { .type = NLA_U32 },
1073 [CTA_NAT_DST] = { .type = NLA_NESTED },
1074 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
1075 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
1076 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
1077 [CTA_ZONE] = { .type = NLA_U16 },
1078 [CTA_MARK_MASK] = { .type = NLA_U32 },
1079 [CTA_LABELS] = { .type = NLA_BINARY,
1080 .len = NF_CT_LABELS_MAX_SIZE },
1081 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
1082 .len = NF_CT_LABELS_MAX_SIZE },
1085 static int ctnetlink_flush_conntrack(struct net *net,
1086 const struct nlattr * const cda[],
1087 u32 portid, int report)
1089 struct ctnetlink_filter *filter = NULL;
1091 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1092 filter = ctnetlink_alloc_filter(cda);
1094 return PTR_ERR(filter);
1097 nf_ct_iterate_cleanup(net, ctnetlink_filter_match, filter,
1104 static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl,
1105 struct sk_buff *skb,
1106 const struct nlmsghdr *nlh,
1107 const struct nlattr * const cda[])
1109 struct nf_conntrack_tuple_hash *h;
1110 struct nf_conntrack_tuple tuple;
1112 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
1113 u_int8_t u3 = nfmsg->nfgen_family;
1114 struct nf_conntrack_zone zone;
1117 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1121 if (cda[CTA_TUPLE_ORIG])
1122 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1124 else if (cda[CTA_TUPLE_REPLY])
1125 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1128 return ctnetlink_flush_conntrack(net, cda,
1129 NETLINK_CB(skb).portid,
1136 h = nf_conntrack_find_get(net, &zone, &tuple);
1140 ct = nf_ct_tuplehash_to_ctrack(h);
1143 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
1144 if (id != (u32)(unsigned long)ct) {
1150 if (del_timer(&ct->timeout))
1151 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh));
1158 static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl,
1159 struct sk_buff *skb,
1160 const struct nlmsghdr *nlh,
1161 const struct nlattr * const cda[])
1163 struct nf_conntrack_tuple_hash *h;
1164 struct nf_conntrack_tuple tuple;
1166 struct sk_buff *skb2 = NULL;
1167 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
1168 u_int8_t u3 = nfmsg->nfgen_family;
1169 struct nf_conntrack_zone zone;
1172 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1173 struct netlink_dump_control c = {
1174 .dump = ctnetlink_dump_table,
1175 .done = ctnetlink_done,
1178 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1179 struct ctnetlink_filter *filter;
1181 filter = ctnetlink_alloc_filter(cda);
1183 return PTR_ERR(filter);
1187 return netlink_dump_start(ctnl, skb, nlh, &c);
1190 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1194 if (cda[CTA_TUPLE_ORIG])
1195 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1197 else if (cda[CTA_TUPLE_REPLY])
1198 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1206 h = nf_conntrack_find_get(net, &zone, &tuple);
1210 ct = nf_ct_tuplehash_to_ctrack(h);
1213 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1220 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1221 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
1227 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
1236 /* this avoids a loop in nfnetlink. */
1237 return err == -EAGAIN ? -ENOBUFS : err;
1240 static int ctnetlink_done_list(struct netlink_callback *cb)
1243 nf_ct_put((struct nf_conn *)cb->args[1]);
1248 ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
1250 struct nf_conn *ct, *last;
1251 struct nf_conntrack_tuple_hash *h;
1252 struct hlist_nulls_node *n;
1253 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1254 u_int8_t l3proto = nfmsg->nfgen_family;
1257 struct hlist_nulls_head *list;
1258 struct net *net = sock_net(skb->sk);
1263 last = (struct nf_conn *)cb->args[1];
1265 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1266 struct ct_pcpu *pcpu;
1268 if (!cpu_possible(cpu))
1271 pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
1272 spin_lock_bh(&pcpu->lock);
1273 list = dying ? &pcpu->dying : &pcpu->unconfirmed;
1275 hlist_nulls_for_each_entry(h, n, list, hnnode) {
1276 ct = nf_ct_tuplehash_to_ctrack(h);
1277 if (l3proto && nf_ct_l3num(ct) != l3proto)
1285 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1287 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1291 if (!atomic_inc_not_zero(&ct->ct_general.use))
1294 cb->args[1] = (unsigned long)ct;
1295 spin_unlock_bh(&pcpu->lock);
1303 spin_unlock_bh(&pcpu->lock);
1314 ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1316 return ctnetlink_dump_list(skb, cb, true);
1319 static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl,
1320 struct sk_buff *skb,
1321 const struct nlmsghdr *nlh,
1322 const struct nlattr * const cda[])
1324 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1325 struct netlink_dump_control c = {
1326 .dump = ctnetlink_dump_dying,
1327 .done = ctnetlink_done_list,
1329 return netlink_dump_start(ctnl, skb, nlh, &c);
1336 ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1338 return ctnetlink_dump_list(skb, cb, false);
1341 static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl,
1342 struct sk_buff *skb,
1343 const struct nlmsghdr *nlh,
1344 const struct nlattr * const cda[])
1346 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1347 struct netlink_dump_control c = {
1348 .dump = ctnetlink_dump_unconfirmed,
1349 .done = ctnetlink_done_list,
1351 return netlink_dump_start(ctnl, skb, nlh, &c);
1357 #ifdef CONFIG_NF_NAT_NEEDED
1359 ctnetlink_parse_nat_setup(struct nf_conn *ct,
1360 enum nf_nat_manip_type manip,
1361 const struct nlattr *attr)
1363 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
1366 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1367 if (!parse_nat_setup) {
1368 #ifdef CONFIG_MODULES
1370 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
1371 if (request_module("nf-nat") < 0) {
1372 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
1376 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
1378 if (nfnetlink_parse_nat_setup_hook)
1384 err = parse_nat_setup(ct, manip, attr);
1385 if (err == -EAGAIN) {
1386 #ifdef CONFIG_MODULES
1388 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
1389 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
1390 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
1394 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
1405 ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
1408 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
1409 d = ct->status ^ status;
1411 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1415 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1416 /* SEEN_REPLY bit can only be set */
1419 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1420 /* ASSURED bit can only be set */
1423 /* Be careful here, modifying NAT bits can screw up things,
1424 * so don't let users modify them directly if they don't pass
1426 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1431 ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
1433 #ifdef CONFIG_NF_NAT_NEEDED
1436 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1439 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1444 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1448 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1454 static int ctnetlink_change_helper(struct nf_conn *ct,
1455 const struct nlattr * const cda[])
1457 struct nf_conntrack_helper *helper;
1458 struct nf_conn_help *help = nfct_help(ct);
1459 char *helpname = NULL;
1460 struct nlattr *helpinfo = NULL;
1463 /* don't change helper of sibling connections */
1467 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
1471 if (!strcmp(helpname, "")) {
1472 if (help && help->helper) {
1473 /* we had a helper before ... */
1474 nf_ct_remove_expectations(ct);
1475 RCU_INIT_POINTER(help->helper, NULL);
1481 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1482 nf_ct_protonum(ct));
1483 if (helper == NULL) {
1484 #ifdef CONFIG_MODULES
1485 spin_unlock_bh(&nf_conntrack_expect_lock);
1487 if (request_module("nfct-helper-%s", helpname) < 0) {
1488 spin_lock_bh(&nf_conntrack_expect_lock);
1492 spin_lock_bh(&nf_conntrack_expect_lock);
1493 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1494 nf_ct_protonum(ct));
1502 if (help->helper == helper) {
1503 /* update private helper data if allowed. */
1504 if (helper->from_nlattr)
1505 helper->from_nlattr(helpinfo, ct);
1511 /* we cannot set a helper for an existing conntrack */
1515 static int ctnetlink_change_timeout(struct nf_conn *ct,
1516 const struct nlattr * const cda[])
1518 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
1520 if (!del_timer(&ct->timeout))
1523 ct->timeout.expires = jiffies + timeout * HZ;
1524 add_timer(&ct->timeout);
1529 static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1530 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1531 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1532 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1535 static int ctnetlink_change_protoinfo(struct nf_conn *ct,
1536 const struct nlattr * const cda[])
1538 const struct nlattr *attr = cda[CTA_PROTOINFO];
1539 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
1540 struct nf_conntrack_l4proto *l4proto;
1543 err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
1548 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
1549 if (l4proto->from_nlattr)
1550 err = l4proto->from_nlattr(tb, ct);
1556 static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = {
1557 [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 },
1558 [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 },
1559 [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 },
1562 static int change_seq_adj(struct nf_ct_seqadj *seq,
1563 const struct nlattr * const attr)
1566 struct nlattr *cda[CTA_SEQADJ_MAX+1];
1568 err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy);
1572 if (!cda[CTA_SEQADJ_CORRECTION_POS])
1575 seq->correction_pos =
1576 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
1578 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
1581 seq->offset_before =
1582 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
1584 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
1588 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
1594 ctnetlink_change_seq_adj(struct nf_conn *ct,
1595 const struct nlattr * const cda[])
1597 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
1603 if (cda[CTA_SEQ_ADJ_ORIG]) {
1604 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
1605 cda[CTA_SEQ_ADJ_ORIG]);
1609 ct->status |= IPS_SEQ_ADJUST;
1612 if (cda[CTA_SEQ_ADJ_REPLY]) {
1613 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
1614 cda[CTA_SEQ_ADJ_REPLY]);
1618 ct->status |= IPS_SEQ_ADJUST;
1625 ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1627 #ifdef CONFIG_NF_CONNTRACK_LABELS
1628 size_t len = nla_len(cda[CTA_LABELS]);
1629 const void *mask = cda[CTA_LABELS_MASK];
1631 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1635 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1636 nla_len(cda[CTA_LABELS_MASK]) != len)
1638 mask = nla_data(cda[CTA_LABELS_MASK]);
1643 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1650 ctnetlink_change_conntrack(struct nf_conn *ct,
1651 const struct nlattr * const cda[])
1655 /* only allow NAT changes and master assignation for new conntracks */
1656 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1659 if (cda[CTA_HELP]) {
1660 err = ctnetlink_change_helper(ct, cda);
1665 if (cda[CTA_TIMEOUT]) {
1666 err = ctnetlink_change_timeout(ct, cda);
1671 if (cda[CTA_STATUS]) {
1672 err = ctnetlink_change_status(ct, cda);
1677 if (cda[CTA_PROTOINFO]) {
1678 err = ctnetlink_change_protoinfo(ct, cda);
1683 #if defined(CONFIG_NF_CONNTRACK_MARK)
1685 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1688 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1689 err = ctnetlink_change_seq_adj(ct, cda);
1694 if (cda[CTA_LABELS]) {
1695 err = ctnetlink_attach_labels(ct, cda);
1703 static struct nf_conn *
1704 ctnetlink_create_conntrack(struct net *net,
1705 const struct nf_conntrack_zone *zone,
1706 const struct nlattr * const cda[],
1707 struct nf_conntrack_tuple *otuple,
1708 struct nf_conntrack_tuple *rtuple,
1713 struct nf_conntrack_helper *helper;
1714 struct nf_conn_tstamp *tstamp;
1716 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
1718 return ERR_PTR(-ENOMEM);
1720 if (!cda[CTA_TIMEOUT])
1722 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
1724 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
1727 if (cda[CTA_HELP]) {
1728 char *helpname = NULL;
1729 struct nlattr *helpinfo = NULL;
1731 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
1735 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1736 nf_ct_protonum(ct));
1737 if (helper == NULL) {
1739 #ifdef CONFIG_MODULES
1740 if (request_module("nfct-helper-%s", helpname) < 0) {
1746 helper = __nf_conntrack_helper_find(helpname,
1748 nf_ct_protonum(ct));
1758 struct nf_conn_help *help;
1760 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
1765 /* set private helper data if allowed. */
1766 if (helper->from_nlattr)
1767 helper->from_nlattr(helpinfo, ct);
1769 /* not in hash table yet so not strictly necessary */
1770 RCU_INIT_POINTER(help->helper, helper);
1773 /* try an implicit helper assignation */
1774 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
1779 err = ctnetlink_setup_nat(ct, cda);
1783 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
1784 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
1785 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
1786 nf_ct_labels_ext_add(ct);
1788 /* we must add conntrack extensions before confirmation. */
1789 ct->status |= IPS_CONFIRMED;
1791 if (cda[CTA_STATUS]) {
1792 err = ctnetlink_change_status(ct, cda);
1797 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1798 err = ctnetlink_change_seq_adj(ct, cda);
1803 memset(&ct->proto, 0, sizeof(ct->proto));
1804 if (cda[CTA_PROTOINFO]) {
1805 err = ctnetlink_change_protoinfo(ct, cda);
1810 #if defined(CONFIG_NF_CONNTRACK_MARK)
1812 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1815 /* setup master conntrack: this is a confirmed expectation */
1816 if (cda[CTA_TUPLE_MASTER]) {
1817 struct nf_conntrack_tuple master;
1818 struct nf_conntrack_tuple_hash *master_h;
1819 struct nf_conn *master_ct;
1821 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
1826 master_h = nf_conntrack_find_get(net, zone, &master);
1827 if (master_h == NULL) {
1831 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
1832 __set_bit(IPS_EXPECTED_BIT, &ct->status);
1833 ct->master = master_ct;
1835 tstamp = nf_conn_tstamp_find(ct);
1837 tstamp->start = ktime_get_real_ns();
1839 err = nf_conntrack_hash_check_insert(ct);
1850 nf_conntrack_free(ct);
1851 return ERR_PTR(err);
1854 static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
1855 struct sk_buff *skb,
1856 const struct nlmsghdr *nlh,
1857 const struct nlattr * const cda[])
1859 struct nf_conntrack_tuple otuple, rtuple;
1860 struct nf_conntrack_tuple_hash *h = NULL;
1861 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
1863 u_int8_t u3 = nfmsg->nfgen_family;
1864 struct nf_conntrack_zone zone;
1867 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1871 if (cda[CTA_TUPLE_ORIG]) {
1872 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
1878 if (cda[CTA_TUPLE_REPLY]) {
1879 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
1885 if (cda[CTA_TUPLE_ORIG])
1886 h = nf_conntrack_find_get(net, &zone, &otuple);
1887 else if (cda[CTA_TUPLE_REPLY])
1888 h = nf_conntrack_find_get(net, &zone, &rtuple);
1892 if (nlh->nlmsg_flags & NLM_F_CREATE) {
1893 enum ip_conntrack_events events;
1895 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
1897 if (otuple.dst.protonum != rtuple.dst.protonum)
1900 ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple,
1906 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1907 events = IPCT_RELATED;
1911 if (cda[CTA_LABELS] &&
1912 ctnetlink_attach_labels(ct, cda) == 0)
1913 events |= (1 << IPCT_LABEL);
1915 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1916 (1 << IPCT_ASSURED) |
1917 (1 << IPCT_HELPER) |
1918 (1 << IPCT_PROTOINFO) |
1919 (1 << IPCT_SEQADJ) |
1920 (1 << IPCT_MARK) | events,
1921 ct, NETLINK_CB(skb).portid,
1928 /* implicit 'else' */
1931 ct = nf_ct_tuplehash_to_ctrack(h);
1932 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
1933 spin_lock_bh(&nf_conntrack_expect_lock);
1934 err = ctnetlink_change_conntrack(ct, cda);
1935 spin_unlock_bh(&nf_conntrack_expect_lock);
1937 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1938 (1 << IPCT_ASSURED) |
1939 (1 << IPCT_HELPER) |
1941 (1 << IPCT_PROTOINFO) |
1942 (1 << IPCT_SEQADJ) |
1944 ct, NETLINK_CB(skb).portid,
1954 ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
1955 __u16 cpu, const struct ip_conntrack_stat *st)
1957 struct nlmsghdr *nlh;
1958 struct nfgenmsg *nfmsg;
1959 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
1961 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU);
1962 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
1966 nfmsg = nlmsg_data(nlh);
1967 nfmsg->nfgen_family = AF_UNSPEC;
1968 nfmsg->version = NFNETLINK_V0;
1969 nfmsg->res_id = htons(cpu);
1971 if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) ||
1972 nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
1973 nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) ||
1974 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
1975 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
1976 nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) ||
1977 nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) ||
1978 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
1979 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
1980 htonl(st->insert_failed)) ||
1981 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
1982 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
1983 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
1984 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
1985 htonl(st->search_restart)))
1986 goto nla_put_failure;
1988 nlmsg_end(skb, nlh);
1993 nlmsg_cancel(skb, nlh);
1998 ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2001 struct net *net = sock_net(skb->sk);
2003 if (cb->args[0] == nr_cpu_ids)
2006 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2007 const struct ip_conntrack_stat *st;
2009 if (!cpu_possible(cpu))
2012 st = per_cpu_ptr(net->ct.stat, cpu);
2013 if (ctnetlink_ct_stat_cpu_fill_info(skb,
2014 NETLINK_CB(cb->skb).portid,
2024 static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl,
2025 struct sk_buff *skb,
2026 const struct nlmsghdr *nlh,
2027 const struct nlattr * const cda[])
2029 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2030 struct netlink_dump_control c = {
2031 .dump = ctnetlink_ct_stat_cpu_dump,
2033 return netlink_dump_start(ctnl, skb, nlh, &c);
2040 ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
2043 struct nlmsghdr *nlh;
2044 struct nfgenmsg *nfmsg;
2045 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
2046 unsigned int nr_conntracks = atomic_read(&net->ct.count);
2048 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS);
2049 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
2053 nfmsg = nlmsg_data(nlh);
2054 nfmsg->nfgen_family = AF_UNSPEC;
2055 nfmsg->version = NFNETLINK_V0;
2058 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
2059 goto nla_put_failure;
2061 nlmsg_end(skb, nlh);
2066 nlmsg_cancel(skb, nlh);
2070 static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl,
2071 struct sk_buff *skb, const struct nlmsghdr *nlh,
2072 const struct nlattr * const cda[])
2074 struct sk_buff *skb2;
2077 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2081 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
2083 NFNL_MSG_TYPE(nlh->nlmsg_type),
2088 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
2097 /* this avoids a loop in nfnetlink. */
2098 return err == -EAGAIN ? -ENOBUFS : err;
2101 static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2102 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2103 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2104 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2105 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2106 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2107 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2108 .len = NF_CT_HELPER_NAME_LEN - 1 },
2109 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2110 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2111 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2112 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2113 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2116 static struct nf_conntrack_expect *
2117 ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2118 struct nf_conntrack_helper *helper,
2119 struct nf_conntrack_tuple *tuple,
2120 struct nf_conntrack_tuple *mask);
2122 #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
2124 ctnetlink_glue_build_size(const struct nf_conn *ct)
2126 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2127 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2128 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2129 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2130 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2131 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2132 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2133 + nla_total_size(0) /* CTA_PROTOINFO */
2134 + nla_total_size(0) /* CTA_HELP */
2135 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2136 + ctnetlink_secctx_size(ct)
2137 #ifdef CONFIG_NF_NAT_NEEDED
2138 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2139 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2141 #ifdef CONFIG_NF_CONNTRACK_MARK
2142 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
2144 #ifdef CONFIG_NF_CONNTRACK_ZONES
2145 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
2147 + ctnetlink_proto_size(ct)
2151 static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
2152 enum ip_conntrack_info *ctinfo)
2156 ct = nf_ct_get(skb, ctinfo);
2157 if (ct && nf_ct_is_untracked(ct))
2163 static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
2165 const struct nf_conntrack_zone *zone;
2166 struct nlattr *nest_parms;
2169 zone = nf_ct_zone(ct);
2171 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2173 goto nla_put_failure;
2174 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2175 goto nla_put_failure;
2176 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2177 NF_CT_ZONE_DIR_ORIG) < 0)
2178 goto nla_put_failure;
2179 nla_nest_end(skb, nest_parms);
2181 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2183 goto nla_put_failure;
2184 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2185 goto nla_put_failure;
2186 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2187 NF_CT_ZONE_DIR_REPL) < 0)
2188 goto nla_put_failure;
2189 nla_nest_end(skb, nest_parms);
2191 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
2192 NF_CT_DEFAULT_ZONE_DIR) < 0)
2193 goto nla_put_failure;
2195 if (ctnetlink_dump_id(skb, ct) < 0)
2196 goto nla_put_failure;
2198 if (ctnetlink_dump_status(skb, ct) < 0)
2199 goto nla_put_failure;
2201 if (ctnetlink_dump_timeout(skb, ct) < 0)
2202 goto nla_put_failure;
2204 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2205 goto nla_put_failure;
2207 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2208 goto nla_put_failure;
2210 #ifdef CONFIG_NF_CONNTRACK_SECMARK
2211 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2212 goto nla_put_failure;
2214 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2215 goto nla_put_failure;
2217 if ((ct->status & IPS_SEQ_ADJUST) &&
2218 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
2219 goto nla_put_failure;
2221 #ifdef CONFIG_NF_CONNTRACK_MARK
2222 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2223 goto nla_put_failure;
2225 if (ctnetlink_dump_labels(skb, ct) < 0)
2226 goto nla_put_failure;
2236 ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
2237 enum ip_conntrack_info ctinfo,
2238 u_int16_t ct_attr, u_int16_t ct_info_attr)
2240 struct nlattr *nest_parms;
2242 nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED);
2244 goto nla_put_failure;
2246 if (__ctnetlink_glue_build(skb, ct) < 0)
2247 goto nla_put_failure;
2249 nla_nest_end(skb, nest_parms);
2251 if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
2252 goto nla_put_failure;
2261 ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
2265 if (cda[CTA_TIMEOUT]) {
2266 err = ctnetlink_change_timeout(ct, cda);
2270 if (cda[CTA_STATUS]) {
2271 err = ctnetlink_change_status(ct, cda);
2275 if (cda[CTA_HELP]) {
2276 err = ctnetlink_change_helper(ct, cda);
2280 if (cda[CTA_LABELS]) {
2281 err = ctnetlink_attach_labels(ct, cda);
2285 #if defined(CONFIG_NF_CONNTRACK_MARK)
2286 if (cda[CTA_MARK]) {
2287 u32 mask = 0, mark, newmark;
2288 if (cda[CTA_MARK_MASK])
2289 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2291 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2292 newmark = (ct->mark & mask) ^ mark;
2293 if (newmark != ct->mark)
2301 ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
2303 struct nlattr *cda[CTA_MAX+1];
2306 ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
2310 spin_lock_bh(&nf_conntrack_expect_lock);
2311 ret = ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
2312 spin_unlock_bh(&nf_conntrack_expect_lock);
2317 static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
2318 const struct nf_conn *ct,
2319 struct nf_conntrack_tuple *tuple,
2320 struct nf_conntrack_tuple *mask)
2324 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
2325 nf_ct_l3num(ct), NULL);
2329 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
2330 nf_ct_l3num(ct), NULL);
2334 ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2335 u32 portid, u32 report)
2337 struct nlattr *cda[CTA_EXPECT_MAX+1];
2338 struct nf_conntrack_tuple tuple, mask;
2339 struct nf_conntrack_helper *helper = NULL;
2340 struct nf_conntrack_expect *exp;
2343 err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy);
2347 err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
2352 if (cda[CTA_EXPECT_HELP_NAME]) {
2353 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2355 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2356 nf_ct_protonum(ct));
2361 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2362 helper, &tuple, &mask);
2364 return PTR_ERR(exp);
2366 err = nf_ct_expect_related_report(exp, portid, report);
2367 nf_ct_expect_put(exp);
2371 static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
2372 enum ip_conntrack_info ctinfo, int diff)
2374 if (!(ct->status & IPS_NAT_MASK))
2377 nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
2380 static struct nfnl_ct_hook ctnetlink_glue_hook = {
2381 .get_ct = ctnetlink_glue_get_ct,
2382 .build_size = ctnetlink_glue_build_size,
2383 .build = ctnetlink_glue_build,
2384 .parse = ctnetlink_glue_parse,
2385 .attach_expect = ctnetlink_glue_attach_expect,
2386 .seq_adjust = ctnetlink_glue_seqadj,
2388 #endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
2390 /***********************************************************************
2392 ***********************************************************************/
2394 static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2395 const struct nf_conntrack_tuple *tuple,
2396 enum ctattr_expect type)
2398 struct nlattr *nest_parms;
2400 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2402 goto nla_put_failure;
2403 if (ctnetlink_dump_tuples(skb, tuple) < 0)
2404 goto nla_put_failure;
2405 nla_nest_end(skb, nest_parms);
2413 static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
2414 const struct nf_conntrack_tuple *tuple,
2415 const struct nf_conntrack_tuple_mask *mask)
2418 struct nf_conntrack_l3proto *l3proto;
2419 struct nf_conntrack_l4proto *l4proto;
2420 struct nf_conntrack_tuple m;
2421 struct nlattr *nest_parms;
2423 memset(&m, 0xFF, sizeof(m));
2424 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
2425 m.src.u.all = mask->src.u.all;
2426 m.dst.protonum = tuple->dst.protonum;
2428 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2430 goto nla_put_failure;
2433 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
2434 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
2436 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2437 tuple->dst.protonum);
2438 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
2442 if (unlikely(ret < 0))
2443 goto nla_put_failure;
2445 nla_nest_end(skb, nest_parms);
2453 static const union nf_inet_addr any_addr;
2456 ctnetlink_exp_dump_expect(struct sk_buff *skb,
2457 const struct nf_conntrack_expect *exp)
2459 struct nf_conn *master = exp->master;
2460 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
2461 struct nf_conn_help *help;
2462 #ifdef CONFIG_NF_NAT_NEEDED
2463 struct nlattr *nest_parms;
2464 struct nf_conntrack_tuple nat_tuple = {};
2466 struct nf_ct_helper_expectfn *expfn;
2471 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
2472 goto nla_put_failure;
2473 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
2474 goto nla_put_failure;
2475 if (ctnetlink_exp_dump_tuple(skb,
2476 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2477 CTA_EXPECT_MASTER) < 0)
2478 goto nla_put_failure;
2480 #ifdef CONFIG_NF_NAT_NEEDED
2481 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2482 exp->saved_proto.all) {
2483 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2485 goto nla_put_failure;
2487 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2488 goto nla_put_failure;
2490 nat_tuple.src.l3num = nf_ct_l3num(master);
2491 nat_tuple.src.u3 = exp->saved_addr;
2492 nat_tuple.dst.protonum = nf_ct_protonum(master);
2493 nat_tuple.src.u = exp->saved_proto;
2495 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2496 CTA_EXPECT_NAT_TUPLE) < 0)
2497 goto nla_put_failure;
2498 nla_nest_end(skb, nest_parms);
2501 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2502 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2503 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2504 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2505 goto nla_put_failure;
2506 help = nfct_help(master);
2508 struct nf_conntrack_helper *helper;
2510 helper = rcu_dereference(help->helper);
2512 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2513 goto nla_put_failure;
2515 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
2516 if (expfn != NULL &&
2517 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2518 goto nla_put_failure;
2527 ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
2528 int event, const struct nf_conntrack_expect *exp)
2530 struct nlmsghdr *nlh;
2531 struct nfgenmsg *nfmsg;
2532 unsigned int flags = portid ? NLM_F_MULTI : 0;
2534 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
2535 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
2539 nfmsg = nlmsg_data(nlh);
2540 nfmsg->nfgen_family = exp->tuple.src.l3num;
2541 nfmsg->version = NFNETLINK_V0;
2544 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
2545 goto nla_put_failure;
2547 nlmsg_end(skb, nlh);
2552 nlmsg_cancel(skb, nlh);
2556 #ifdef CONFIG_NF_CONNTRACK_EVENTS
2558 ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
2560 struct nf_conntrack_expect *exp = item->exp;
2561 struct net *net = nf_ct_exp_net(exp);
2562 struct nlmsghdr *nlh;
2563 struct nfgenmsg *nfmsg;
2564 struct sk_buff *skb;
2565 unsigned int type, group;
2568 if (events & (1 << IPEXP_DESTROY)) {
2569 type = IPCTNL_MSG_EXP_DELETE;
2570 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2571 } else if (events & (1 << IPEXP_NEW)) {
2572 type = IPCTNL_MSG_EXP_NEW;
2573 flags = NLM_F_CREATE|NLM_F_EXCL;
2574 group = NFNLGRP_CONNTRACK_EXP_NEW;
2578 if (!item->report && !nfnetlink_has_listeners(net, group))
2581 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2585 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
2586 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
2590 nfmsg = nlmsg_data(nlh);
2591 nfmsg->nfgen_family = exp->tuple.src.l3num;
2592 nfmsg->version = NFNETLINK_V0;
2596 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
2597 goto nla_put_failure;
2600 nlmsg_end(skb, nlh);
2601 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
2606 nlmsg_cancel(skb, nlh);
2610 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
2614 static int ctnetlink_exp_done(struct netlink_callback *cb)
2617 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
2622 ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2624 struct net *net = sock_net(skb->sk);
2625 struct nf_conntrack_expect *exp, *last;
2626 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2627 u_int8_t l3proto = nfmsg->nfgen_family;
2630 last = (struct nf_conntrack_expect *)cb->args[1];
2631 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
2633 hlist_for_each_entry(exp, &nf_ct_expect_hash[cb->args[0]],
2635 if (l3proto && exp->tuple.src.l3num != l3proto)
2638 if (!net_eq(nf_ct_net(exp->master), net))
2646 if (ctnetlink_exp_fill_info(skb,
2647 NETLINK_CB(cb->skb).portid,
2651 if (!atomic_inc_not_zero(&exp->use))
2653 cb->args[1] = (unsigned long)exp;
2665 nf_ct_expect_put(last);
2671 ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2673 struct nf_conntrack_expect *exp, *last;
2674 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2675 struct nf_conn *ct = cb->data;
2676 struct nf_conn_help *help = nfct_help(ct);
2677 u_int8_t l3proto = nfmsg->nfgen_family;
2683 last = (struct nf_conntrack_expect *)cb->args[1];
2685 hlist_for_each_entry(exp, &help->expectations, lnode) {
2686 if (l3proto && exp->tuple.src.l3num != l3proto)
2693 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2697 if (!atomic_inc_not_zero(&exp->use))
2699 cb->args[1] = (unsigned long)exp;
2711 nf_ct_expect_put(last);
2716 static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
2717 struct sk_buff *skb,
2718 const struct nlmsghdr *nlh,
2719 const struct nlattr * const cda[])
2722 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2723 u_int8_t u3 = nfmsg->nfgen_family;
2724 struct nf_conntrack_tuple tuple;
2725 struct nf_conntrack_tuple_hash *h;
2727 struct nf_conntrack_zone zone;
2728 struct netlink_dump_control c = {
2729 .dump = ctnetlink_exp_ct_dump_table,
2730 .done = ctnetlink_exp_done,
2733 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2738 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2742 h = nf_conntrack_find_get(net, &zone, &tuple);
2746 ct = nf_ct_tuplehash_to_ctrack(h);
2749 err = netlink_dump_start(ctnl, skb, nlh, &c);
2755 static int ctnetlink_get_expect(struct net *net, struct sock *ctnl,
2756 struct sk_buff *skb, const struct nlmsghdr *nlh,
2757 const struct nlattr * const cda[])
2759 struct nf_conntrack_tuple tuple;
2760 struct nf_conntrack_expect *exp;
2761 struct sk_buff *skb2;
2762 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2763 u_int8_t u3 = nfmsg->nfgen_family;
2764 struct nf_conntrack_zone zone;
2767 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2768 if (cda[CTA_EXPECT_MASTER])
2769 return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda);
2771 struct netlink_dump_control c = {
2772 .dump = ctnetlink_exp_dump_table,
2773 .done = ctnetlink_exp_done,
2775 return netlink_dump_start(ctnl, skb, nlh, &c);
2779 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2783 if (cda[CTA_EXPECT_TUPLE])
2784 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2786 else if (cda[CTA_EXPECT_MASTER])
2787 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2795 exp = nf_ct_expect_find_get(net, &zone, &tuple);
2799 if (cda[CTA_EXPECT_ID]) {
2800 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
2801 if (ntohl(id) != (u32)(unsigned long)exp) {
2802 nf_ct_expect_put(exp);
2808 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2810 nf_ct_expect_put(exp);
2815 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
2816 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
2818 nf_ct_expect_put(exp);
2822 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
2831 /* this avoids a loop in nfnetlink. */
2832 return err == -EAGAIN ? -ENOBUFS : err;
2835 static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
2836 struct sk_buff *skb, const struct nlmsghdr *nlh,
2837 const struct nlattr * const cda[])
2839 struct nf_conntrack_expect *exp;
2840 struct nf_conntrack_tuple tuple;
2841 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2842 struct hlist_node *next;
2843 u_int8_t u3 = nfmsg->nfgen_family;
2844 struct nf_conntrack_zone zone;
2848 if (cda[CTA_EXPECT_TUPLE]) {
2849 /* delete a single expect by tuple */
2850 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2854 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2859 /* bump usage count to 2 */
2860 exp = nf_ct_expect_find_get(net, &zone, &tuple);
2864 if (cda[CTA_EXPECT_ID]) {
2865 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
2866 if (ntohl(id) != (u32)(unsigned long)exp) {
2867 nf_ct_expect_put(exp);
2872 /* after list removal, usage count == 1 */
2873 spin_lock_bh(&nf_conntrack_expect_lock);
2874 if (del_timer(&exp->timeout)) {
2875 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
2877 nf_ct_expect_put(exp);
2879 spin_unlock_bh(&nf_conntrack_expect_lock);
2880 /* have to put what we 'get' above.
2881 * after this line usage count == 0 */
2882 nf_ct_expect_put(exp);
2883 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2884 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2885 struct nf_conn_help *m_help;
2887 /* delete all expectations for this helper */
2888 spin_lock_bh(&nf_conntrack_expect_lock);
2889 for (i = 0; i < nf_ct_expect_hsize; i++) {
2890 hlist_for_each_entry_safe(exp, next,
2891 &nf_ct_expect_hash[i],
2894 if (!net_eq(nf_ct_exp_net(exp), net))
2897 m_help = nfct_help(exp->master);
2898 if (!strcmp(m_help->helper->name, name) &&
2899 del_timer(&exp->timeout)) {
2900 nf_ct_unlink_expect_report(exp,
2901 NETLINK_CB(skb).portid,
2903 nf_ct_expect_put(exp);
2907 spin_unlock_bh(&nf_conntrack_expect_lock);
2909 /* This basically means we have to flush everything*/
2910 spin_lock_bh(&nf_conntrack_expect_lock);
2911 for (i = 0; i < nf_ct_expect_hsize; i++) {
2912 hlist_for_each_entry_safe(exp, next,
2913 &nf_ct_expect_hash[i],
2916 if (!net_eq(nf_ct_exp_net(exp), net))
2919 if (del_timer(&exp->timeout)) {
2920 nf_ct_unlink_expect_report(exp,
2921 NETLINK_CB(skb).portid,
2923 nf_ct_expect_put(exp);
2927 spin_unlock_bh(&nf_conntrack_expect_lock);
2933 ctnetlink_change_expect(struct nf_conntrack_expect *x,
2934 const struct nlattr * const cda[])
2936 if (cda[CTA_EXPECT_TIMEOUT]) {
2937 if (!del_timer(&x->timeout))
2940 x->timeout.expires = jiffies +
2941 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2942 add_timer(&x->timeout);
2947 static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2948 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2949 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2953 ctnetlink_parse_expect_nat(const struct nlattr *attr,
2954 struct nf_conntrack_expect *exp,
2957 #ifdef CONFIG_NF_NAT_NEEDED
2958 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2959 struct nf_conntrack_tuple nat_tuple = {};
2962 err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2966 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2969 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2970 &nat_tuple, CTA_EXPECT_NAT_TUPLE,
2975 exp->saved_addr = nat_tuple.src.u3;
2976 exp->saved_proto = nat_tuple.src.u;
2977 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2985 static struct nf_conntrack_expect *
2986 ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
2987 struct nf_conntrack_helper *helper,
2988 struct nf_conntrack_tuple *tuple,
2989 struct nf_conntrack_tuple *mask)
2991 u_int32_t class = 0;
2992 struct nf_conntrack_expect *exp;
2993 struct nf_conn_help *help;
2996 if (cda[CTA_EXPECT_CLASS] && helper) {
2997 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
2998 if (class > helper->expect_class_max)
2999 return ERR_PTR(-EINVAL);
3001 exp = nf_ct_expect_alloc(ct);
3003 return ERR_PTR(-ENOMEM);
3005 help = nfct_help(ct);
3007 if (!cda[CTA_EXPECT_TIMEOUT]) {
3011 exp->timeout.expires =
3012 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
3014 exp->flags = NF_CT_EXPECT_USERSPACE;
3015 if (cda[CTA_EXPECT_FLAGS]) {
3017 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3020 if (cda[CTA_EXPECT_FLAGS]) {
3021 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3022 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
3026 if (cda[CTA_EXPECT_FN]) {
3027 const char *name = nla_data(cda[CTA_EXPECT_FN]);
3028 struct nf_ct_helper_expectfn *expfn;
3030 expfn = nf_ct_helper_expectfn_find_by_name(name);
3031 if (expfn == NULL) {
3035 exp->expectfn = expfn->expectfn;
3037 exp->expectfn = NULL;
3041 exp->helper = helper;
3042 exp->tuple = *tuple;
3043 exp->mask.src.u3 = mask->src.u3;
3044 exp->mask.src.u.all = mask->src.u.all;
3046 if (cda[CTA_EXPECT_NAT]) {
3047 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
3048 exp, nf_ct_l3num(ct));
3054 nf_ct_expect_put(exp);
3055 return ERR_PTR(err);
3059 ctnetlink_create_expect(struct net *net,
3060 const struct nf_conntrack_zone *zone,
3061 const struct nlattr * const cda[],
3062 u_int8_t u3, u32 portid, int report)
3064 struct nf_conntrack_tuple tuple, mask, master_tuple;
3065 struct nf_conntrack_tuple_hash *h = NULL;
3066 struct nf_conntrack_helper *helper = NULL;
3067 struct nf_conntrack_expect *exp;
3071 /* caller guarantees that those three CTA_EXPECT_* exist */
3072 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3076 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
3080 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
3085 /* Look for master conntrack of this expectation */
3086 h = nf_conntrack_find_get(net, zone, &master_tuple);
3089 ct = nf_ct_tuplehash_to_ctrack(h);
3091 if (cda[CTA_EXPECT_HELP_NAME]) {
3092 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
3094 helper = __nf_conntrack_helper_find(helpname, u3,
3095 nf_ct_protonum(ct));
3096 if (helper == NULL) {
3097 #ifdef CONFIG_MODULES
3098 if (request_module("nfct-helper-%s", helpname) < 0) {
3102 helper = __nf_conntrack_helper_find(helpname, u3,
3103 nf_ct_protonum(ct));
3114 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
3120 err = nf_ct_expect_related_report(exp, portid, report);
3121 nf_ct_expect_put(exp);
3127 static int ctnetlink_new_expect(struct net *net, struct sock *ctnl,
3128 struct sk_buff *skb, const struct nlmsghdr *nlh,
3129 const struct nlattr * const cda[])
3131 struct nf_conntrack_tuple tuple;
3132 struct nf_conntrack_expect *exp;
3133 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
3134 u_int8_t u3 = nfmsg->nfgen_family;
3135 struct nf_conntrack_zone zone;
3138 if (!cda[CTA_EXPECT_TUPLE]
3139 || !cda[CTA_EXPECT_MASK]
3140 || !cda[CTA_EXPECT_MASTER])
3143 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3147 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3152 spin_lock_bh(&nf_conntrack_expect_lock);
3153 exp = __nf_ct_expect_find(net, &zone, &tuple);
3155 spin_unlock_bh(&nf_conntrack_expect_lock);
3157 if (nlh->nlmsg_flags & NLM_F_CREATE) {
3158 err = ctnetlink_create_expect(net, &zone, cda, u3,
3159 NETLINK_CB(skb).portid,
3166 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
3167 err = ctnetlink_change_expect(exp, cda);
3168 spin_unlock_bh(&nf_conntrack_expect_lock);
3174 ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
3175 const struct ip_conntrack_stat *st)
3177 struct nlmsghdr *nlh;
3178 struct nfgenmsg *nfmsg;
3179 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
3181 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU);
3182 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
3186 nfmsg = nlmsg_data(nlh);
3187 nfmsg->nfgen_family = AF_UNSPEC;
3188 nfmsg->version = NFNETLINK_V0;
3189 nfmsg->res_id = htons(cpu);
3191 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3192 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3193 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3194 goto nla_put_failure;
3196 nlmsg_end(skb, nlh);
3201 nlmsg_cancel(skb, nlh);
3206 ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3209 struct net *net = sock_net(skb->sk);
3211 if (cb->args[0] == nr_cpu_ids)
3214 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3215 const struct ip_conntrack_stat *st;
3217 if (!cpu_possible(cpu))
3220 st = per_cpu_ptr(net->ct.stat, cpu);
3221 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
3231 static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl,
3232 struct sk_buff *skb,
3233 const struct nlmsghdr *nlh,
3234 const struct nlattr * const cda[])
3236 if (nlh->nlmsg_flags & NLM_F_DUMP) {
3237 struct netlink_dump_control c = {
3238 .dump = ctnetlink_exp_stat_cpu_dump,
3240 return netlink_dump_start(ctnl, skb, nlh, &c);
3246 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3247 static struct nf_ct_event_notifier ctnl_notifier = {
3248 .fcn = ctnetlink_conntrack_event,
3251 static struct nf_exp_event_notifier ctnl_notifier_exp = {
3252 .fcn = ctnetlink_expect_event,
3256 static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
3257 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
3258 .attr_count = CTA_MAX,
3259 .policy = ct_nla_policy },
3260 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
3261 .attr_count = CTA_MAX,
3262 .policy = ct_nla_policy },
3263 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
3264 .attr_count = CTA_MAX,
3265 .policy = ct_nla_policy },
3266 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
3267 .attr_count = CTA_MAX,
3268 .policy = ct_nla_policy },
3269 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
3270 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
3271 [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying },
3272 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed },
3275 static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
3276 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
3277 .attr_count = CTA_EXPECT_MAX,
3278 .policy = exp_nla_policy },
3279 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
3280 .attr_count = CTA_EXPECT_MAX,
3281 .policy = exp_nla_policy },
3282 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
3283 .attr_count = CTA_EXPECT_MAX,
3284 .policy = exp_nla_policy },
3285 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
3288 static const struct nfnetlink_subsystem ctnl_subsys = {
3289 .name = "conntrack",
3290 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3291 .cb_count = IPCTNL_MSG_MAX,
3295 static const struct nfnetlink_subsystem ctnl_exp_subsys = {
3296 .name = "conntrack_expect",
3297 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3298 .cb_count = IPCTNL_MSG_EXP_MAX,
3302 MODULE_ALIAS("ip_conntrack_netlink");
3303 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
3304 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
3306 static int __net_init ctnetlink_net_init(struct net *net)
3308 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3311 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
3313 pr_err("ctnetlink_init: cannot register notifier.\n");
3317 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
3319 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3320 goto err_unreg_notifier;
3325 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3327 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3333 static void ctnetlink_net_exit(struct net *net)
3335 #ifdef CONFIG_NF_CONNTRACK_EVENTS
3336 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
3337 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3341 static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
3345 list_for_each_entry(net, net_exit_list, exit_list)
3346 ctnetlink_net_exit(net);
3349 static struct pernet_operations ctnetlink_net_ops = {
3350 .init = ctnetlink_net_init,
3351 .exit_batch = ctnetlink_net_exit_batch,
3354 static int __init ctnetlink_init(void)
3358 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
3359 ret = nfnetlink_subsys_register(&ctnl_subsys);
3361 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
3365 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3367 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
3368 goto err_unreg_subsys;
3371 ret = register_pernet_subsys(&ctnetlink_net_ops);
3373 pr_err("ctnetlink_init: cannot register pernet operations\n");
3374 goto err_unreg_exp_subsys;
3376 #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
3377 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3378 RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook);
3382 err_unreg_exp_subsys:
3383 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3385 nfnetlink_subsys_unregister(&ctnl_subsys);
3390 static void __exit ctnetlink_exit(void)
3392 pr_info("ctnetlink: unregistering from nfnetlink.\n");
3394 unregister_pernet_subsys(&ctnetlink_net_ops);
3395 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3396 nfnetlink_subsys_unregister(&ctnl_subsys);
3397 #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
3398 RCU_INIT_POINTER(nfnl_ct_hook, NULL);
3402 module_init(ctnetlink_init);
3403 module_exit(ctnetlink_exit);