1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/types.h>
3 #include <linux/netfilter.h>
4 #include <linux/slab.h>
5 #include <linux/module.h>
6 #include <linux/skbuff.h>
7 #include <linux/proc_fs.h>
8 #include <linux/seq_file.h>
9 #include <linux/percpu.h>
10 #include <linux/netdevice.h>
11 #include <linux/security.h>
12 #include <net/net_namespace.h>
14 #include <linux/sysctl.h>
17 #include <net/netfilter/nf_conntrack.h>
18 #include <net/netfilter/nf_conntrack_core.h>
19 #include <net/netfilter/nf_conntrack_l4proto.h>
20 #include <net/netfilter/nf_conntrack_expect.h>
21 #include <net/netfilter/nf_conntrack_helper.h>
22 #include <net/netfilter/nf_conntrack_acct.h>
23 #include <net/netfilter/nf_conntrack_zones.h>
24 #include <net/netfilter/nf_conntrack_timestamp.h>
25 #include <linux/rculist_nulls.h>
27 static bool enable_hooks __read_mostly;
28 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
29 module_param(enable_hooks, bool, 0000);
31 unsigned int nf_conntrack_net_id __read_mostly;
33 #ifdef CONFIG_NF_CONNTRACK_PROCFS
35 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
36 const struct nf_conntrack_l4proto *l4proto)
38 switch (tuple->src.l3num) {
40 seq_printf(s, "src=%pI4 dst=%pI4 ",
41 &tuple->src.u3.ip, &tuple->dst.u3.ip);
44 seq_printf(s, "src=%pI6 dst=%pI6 ",
45 tuple->src.u3.ip6, tuple->dst.u3.ip6);
51 switch (l4proto->l4proto) {
53 seq_printf(s, "type=%u code=%u id=%u ",
54 tuple->dst.u.icmp.type,
55 tuple->dst.u.icmp.code,
56 ntohs(tuple->src.u.icmp.id));
59 seq_printf(s, "sport=%hu dport=%hu ",
60 ntohs(tuple->src.u.tcp.port),
61 ntohs(tuple->dst.u.tcp.port));
63 case IPPROTO_UDPLITE: /* fallthrough */
65 seq_printf(s, "sport=%hu dport=%hu ",
66 ntohs(tuple->src.u.udp.port),
67 ntohs(tuple->dst.u.udp.port));
71 seq_printf(s, "sport=%hu dport=%hu ",
72 ntohs(tuple->src.u.dccp.port),
73 ntohs(tuple->dst.u.dccp.port));
76 seq_printf(s, "sport=%hu dport=%hu ",
77 ntohs(tuple->src.u.sctp.port),
78 ntohs(tuple->dst.u.sctp.port));
81 seq_printf(s, "type=%u code=%u id=%u ",
82 tuple->dst.u.icmp.type,
83 tuple->dst.u.icmp.code,
84 ntohs(tuple->src.u.icmp.id));
87 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
88 ntohs(tuple->src.u.gre.key),
89 ntohs(tuple->dst.u.gre.key));
95 EXPORT_SYMBOL_GPL(print_tuple);
97 struct ct_iter_state {
98 struct seq_net_private p;
99 struct hlist_nulls_head *hash;
100 unsigned int htable_size;
105 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
107 struct ct_iter_state *st = seq->private;
108 struct hlist_nulls_node *n;
111 st->bucket < st->htable_size;
114 hlist_nulls_first_rcu(&st->hash[st->bucket]));
121 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
122 struct hlist_nulls_node *head)
124 struct ct_iter_state *st = seq->private;
126 head = rcu_dereference(hlist_nulls_next_rcu(head));
127 while (is_a_nulls(head)) {
128 if (likely(get_nulls_value(head) == st->bucket)) {
129 if (++st->bucket >= st->htable_size)
132 head = rcu_dereference(
133 hlist_nulls_first_rcu(&st->hash[st->bucket]));
138 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
140 struct hlist_nulls_node *head = ct_get_first(seq);
143 while (pos && (head = ct_get_next(seq, head)))
145 return pos ? NULL : head;
148 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
151 struct ct_iter_state *st = seq->private;
153 st->time_now = ktime_get_real_ns();
156 nf_conntrack_get_ht(&st->hash, &st->htable_size);
157 return ct_get_idx(seq, *pos);
160 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
163 return ct_get_next(s, v);
166 static void ct_seq_stop(struct seq_file *s, void *v)
172 #ifdef CONFIG_NF_CONNTRACK_SECMARK
173 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
179 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
183 seq_printf(s, "secctx=%s ", secctx);
185 security_release_secctx(secctx, len);
188 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
193 #ifdef CONFIG_NF_CONNTRACK_ZONES
194 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
197 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
199 if (zone->dir != dir)
202 case NF_CT_DEFAULT_ZONE_DIR:
203 seq_printf(s, "zone=%u ", zone->id);
205 case NF_CT_ZONE_DIR_ORIG:
206 seq_printf(s, "zone-orig=%u ", zone->id);
208 case NF_CT_ZONE_DIR_REPL:
209 seq_printf(s, "zone-reply=%u ", zone->id);
216 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
222 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
223 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
225 struct ct_iter_state *st = s->private;
226 struct nf_conn_tstamp *tstamp;
229 tstamp = nf_conn_tstamp_find(ct);
231 delta_time = st->time_now - tstamp->start;
233 delta_time = div_s64(delta_time, NSEC_PER_SEC);
237 seq_printf(s, "delta-time=%llu ",
238 (unsigned long long)delta_time);
244 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
249 static const char* l3proto_name(u16 proto)
252 case AF_INET: return "ipv4";
253 case AF_INET6: return "ipv6";
259 static const char* l4proto_name(u16 proto)
262 case IPPROTO_ICMP: return "icmp";
263 case IPPROTO_TCP: return "tcp";
264 case IPPROTO_UDP: return "udp";
265 case IPPROTO_DCCP: return "dccp";
266 case IPPROTO_GRE: return "gre";
267 case IPPROTO_SCTP: return "sctp";
268 case IPPROTO_UDPLITE: return "udplite";
275 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
277 struct nf_conn_acct *acct;
278 struct nf_conn_counter *counter;
280 acct = nf_conn_acct_find(ct);
284 counter = acct->counter;
285 seq_printf(s, "packets=%llu bytes=%llu ",
286 (unsigned long long)atomic64_read(&counter[dir].packets),
287 (unsigned long long)atomic64_read(&counter[dir].bytes));
292 /* return 0 on success, 1 in case of error */
293 static int ct_seq_show(struct seq_file *s, void *v)
295 struct nf_conntrack_tuple_hash *hash = v;
296 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
297 const struct nf_conntrack_l4proto *l4proto;
298 struct net *net = seq_file_net(s);
302 if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
305 if (nf_ct_should_gc(ct)) {
310 /* we only want to print DIR_ORIGINAL */
311 if (NF_CT_DIRECTION(hash))
314 if (!net_eq(nf_ct_net(ct), net))
317 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
320 seq_printf(s, "%-8s %u %-8s %u ",
321 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
322 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
324 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
325 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
327 if (l4proto->print_conntrack)
328 l4proto->print_conntrack(s, ct);
330 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
333 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
335 if (seq_has_overflowed(s))
338 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
341 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
342 seq_puts(s, "[UNREPLIED] ");
344 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
346 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
348 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
351 if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
352 seq_puts(s, "[OFFLOAD] ");
353 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
354 seq_puts(s, "[ASSURED] ");
356 if (seq_has_overflowed(s))
359 #if defined(CONFIG_NF_CONNTRACK_MARK)
360 seq_printf(s, "mark=%u ", ct->mark);
363 ct_show_secctx(s, ct);
364 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
365 ct_show_delta_time(s, ct);
367 seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
369 if (seq_has_overflowed(s))
378 static const struct seq_operations ct_seq_ops = {
379 .start = ct_seq_start,
385 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
387 struct net *net = seq_file_net(seq);
391 return SEQ_START_TOKEN;
393 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
394 if (!cpu_possible(cpu))
397 return per_cpu_ptr(net->ct.stat, cpu);
403 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
405 struct net *net = seq_file_net(seq);
408 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
409 if (!cpu_possible(cpu))
412 return per_cpu_ptr(net->ct.stat, cpu);
418 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
422 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
424 struct net *net = seq_file_net(seq);
425 unsigned int nr_conntracks = atomic_read(&net->ct.count);
426 const struct ip_conntrack_stat *st = v;
428 if (v == SEQ_START_TOKEN) {
429 seq_puts(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n");
433 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
434 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
457 static const struct seq_operations ct_cpu_seq_ops = {
458 .start = ct_cpu_seq_start,
459 .next = ct_cpu_seq_next,
460 .stop = ct_cpu_seq_stop,
461 .show = ct_cpu_seq_show,
464 static int nf_conntrack_standalone_init_proc(struct net *net)
466 struct proc_dir_entry *pde;
470 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
471 sizeof(struct ct_iter_state));
473 goto out_nf_conntrack;
475 root_uid = make_kuid(net->user_ns, 0);
476 root_gid = make_kgid(net->user_ns, 0);
477 if (uid_valid(root_uid) && gid_valid(root_gid))
478 proc_set_user(pde, root_uid, root_gid);
480 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
481 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
483 goto out_stat_nf_conntrack;
486 out_stat_nf_conntrack:
487 remove_proc_entry("nf_conntrack", net->proc_net);
492 static void nf_conntrack_standalone_fini_proc(struct net *net)
494 remove_proc_entry("nf_conntrack", net->proc_net_stat);
495 remove_proc_entry("nf_conntrack", net->proc_net);
498 static int nf_conntrack_standalone_init_proc(struct net *net)
503 static void nf_conntrack_standalone_fini_proc(struct net *net)
506 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
511 /* Log invalid packets of a given protocol */
512 static int log_invalid_proto_min __read_mostly;
513 static int log_invalid_proto_max __read_mostly = 255;
517 /* size the user *wants to set */
518 static unsigned int nf_conntrack_htable_size_user __read_mostly;
521 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
522 void __user *buffer, size_t *lenp, loff_t *ppos)
526 ret = proc_dointvec(table, write, buffer, lenp, ppos);
527 if (ret < 0 || !write)
530 /* update ret, we might not be able to satisfy request */
531 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
533 /* update it to the actual value used by conntrack */
534 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
538 static struct ctl_table_header *nf_ct_netfilter_header;
540 enum nf_ct_sysctl_index {
543 NF_SYSCTL_CT_BUCKETS,
544 NF_SYSCTL_CT_CHECKSUM,
545 NF_SYSCTL_CT_LOG_INVALID,
546 NF_SYSCTL_CT_EXPECT_MAX,
549 #ifdef CONFIG_NF_CONNTRACK_EVENTS
552 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
553 NF_SYSCTL_CT_TIMESTAMP,
555 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
556 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
557 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
558 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
559 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
560 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
561 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
562 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
563 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
564 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
565 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
566 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
567 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
568 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
573 #ifdef CONFIG_NF_CT_PROTO_SCTP
574 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
577 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
578 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
579 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
580 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
581 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
582 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
584 #ifdef CONFIG_NF_CT_PROTO_DCCP
585 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
586 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
587 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
588 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
589 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
592 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
594 #ifdef CONFIG_NF_CT_PROTO_GRE
595 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
596 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
599 __NF_SYSCTL_CT_LAST_SYSCTL,
602 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
604 static struct ctl_table nf_ct_sysctl_table[] = {
605 [NF_SYSCTL_CT_MAX] = {
606 .procname = "nf_conntrack_max",
607 .data = &nf_conntrack_max,
608 .maxlen = sizeof(int),
610 .proc_handler = proc_dointvec,
612 [NF_SYSCTL_CT_COUNT] = {
613 .procname = "nf_conntrack_count",
614 .data = &init_net.ct.count,
615 .maxlen = sizeof(int),
617 .proc_handler = proc_dointvec,
619 [NF_SYSCTL_CT_BUCKETS] = {
620 .procname = "nf_conntrack_buckets",
621 .data = &nf_conntrack_htable_size_user,
622 .maxlen = sizeof(unsigned int),
624 .proc_handler = nf_conntrack_hash_sysctl,
626 [NF_SYSCTL_CT_CHECKSUM] = {
627 .procname = "nf_conntrack_checksum",
628 .data = &init_net.ct.sysctl_checksum,
629 .maxlen = sizeof(int),
631 .proc_handler = proc_dointvec_minmax,
635 [NF_SYSCTL_CT_LOG_INVALID] = {
636 .procname = "nf_conntrack_log_invalid",
637 .data = &init_net.ct.sysctl_log_invalid,
638 .maxlen = sizeof(unsigned int),
640 .proc_handler = proc_dointvec_minmax,
641 .extra1 = &log_invalid_proto_min,
642 .extra2 = &log_invalid_proto_max,
644 [NF_SYSCTL_CT_EXPECT_MAX] = {
645 .procname = "nf_conntrack_expect_max",
646 .data = &nf_ct_expect_max,
647 .maxlen = sizeof(int),
649 .proc_handler = proc_dointvec,
651 [NF_SYSCTL_CT_ACCT] = {
652 .procname = "nf_conntrack_acct",
653 .data = &init_net.ct.sysctl_acct,
654 .maxlen = sizeof(int),
656 .proc_handler = proc_dointvec_minmax,
660 [NF_SYSCTL_CT_HELPER] = {
661 .procname = "nf_conntrack_helper",
662 .data = &init_net.ct.sysctl_auto_assign_helper,
663 .maxlen = sizeof(int),
665 .proc_handler = proc_dointvec_minmax,
669 #ifdef CONFIG_NF_CONNTRACK_EVENTS
670 [NF_SYSCTL_CT_EVENTS] = {
671 .procname = "nf_conntrack_events",
672 .data = &init_net.ct.sysctl_events,
673 .maxlen = sizeof(int),
675 .proc_handler = proc_dointvec_minmax,
680 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
681 [NF_SYSCTL_CT_TIMESTAMP] = {
682 .procname = "nf_conntrack_timestamp",
683 .data = &init_net.ct.sysctl_tstamp,
684 .maxlen = sizeof(int),
686 .proc_handler = proc_dointvec_minmax,
691 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
692 .procname = "nf_conntrack_generic_timeout",
693 .maxlen = sizeof(unsigned int),
695 .proc_handler = proc_dointvec_jiffies,
697 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
698 .procname = "nf_conntrack_tcp_timeout_syn_sent",
699 .maxlen = sizeof(unsigned int),
701 .proc_handler = proc_dointvec_jiffies,
703 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
704 .procname = "nf_conntrack_tcp_timeout_syn_recv",
705 .maxlen = sizeof(unsigned int),
707 .proc_handler = proc_dointvec_jiffies,
709 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
710 .procname = "nf_conntrack_tcp_timeout_established",
711 .maxlen = sizeof(unsigned int),
713 .proc_handler = proc_dointvec_jiffies,
715 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
716 .procname = "nf_conntrack_tcp_timeout_fin_wait",
717 .maxlen = sizeof(unsigned int),
719 .proc_handler = proc_dointvec_jiffies,
721 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
722 .procname = "nf_conntrack_tcp_timeout_close_wait",
723 .maxlen = sizeof(unsigned int),
725 .proc_handler = proc_dointvec_jiffies,
727 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
728 .procname = "nf_conntrack_tcp_timeout_last_ack",
729 .maxlen = sizeof(unsigned int),
731 .proc_handler = proc_dointvec_jiffies,
733 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
734 .procname = "nf_conntrack_tcp_timeout_time_wait",
735 .maxlen = sizeof(unsigned int),
737 .proc_handler = proc_dointvec_jiffies,
739 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
740 .procname = "nf_conntrack_tcp_timeout_close",
741 .maxlen = sizeof(unsigned int),
743 .proc_handler = proc_dointvec_jiffies,
745 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
746 .procname = "nf_conntrack_tcp_timeout_max_retrans",
747 .maxlen = sizeof(unsigned int),
749 .proc_handler = proc_dointvec_jiffies,
751 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
752 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
753 .maxlen = sizeof(unsigned int),
755 .proc_handler = proc_dointvec_jiffies,
757 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
758 .procname = "nf_conntrack_tcp_loose",
759 .maxlen = sizeof(int),
761 .proc_handler = proc_dointvec_minmax,
765 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
766 .procname = "nf_conntrack_tcp_be_liberal",
767 .maxlen = sizeof(int),
769 .proc_handler = proc_dointvec_minmax,
773 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
774 .procname = "nf_conntrack_tcp_max_retrans",
775 .maxlen = sizeof(unsigned int),
777 .proc_handler = proc_dointvec,
779 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
780 .procname = "nf_conntrack_udp_timeout",
781 .maxlen = sizeof(unsigned int),
783 .proc_handler = proc_dointvec_jiffies,
785 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
786 .procname = "nf_conntrack_udp_timeout_stream",
787 .maxlen = sizeof(unsigned int),
789 .proc_handler = proc_dointvec_jiffies,
791 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
792 .procname = "nf_conntrack_icmp_timeout",
793 .maxlen = sizeof(unsigned int),
795 .proc_handler = proc_dointvec_jiffies,
797 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
798 .procname = "nf_conntrack_icmpv6_timeout",
799 .maxlen = sizeof(unsigned int),
801 .proc_handler = proc_dointvec_jiffies,
803 #ifdef CONFIG_NF_CT_PROTO_SCTP
804 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
805 .procname = "nf_conntrack_sctp_timeout_closed",
806 .maxlen = sizeof(unsigned int),
808 .proc_handler = proc_dointvec_jiffies,
810 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
811 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
812 .maxlen = sizeof(unsigned int),
814 .proc_handler = proc_dointvec_jiffies,
816 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
817 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
818 .maxlen = sizeof(unsigned int),
820 .proc_handler = proc_dointvec_jiffies,
822 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
823 .procname = "nf_conntrack_sctp_timeout_established",
824 .maxlen = sizeof(unsigned int),
826 .proc_handler = proc_dointvec_jiffies,
828 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
829 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
830 .maxlen = sizeof(unsigned int),
832 .proc_handler = proc_dointvec_jiffies,
834 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
835 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
836 .maxlen = sizeof(unsigned int),
838 .proc_handler = proc_dointvec_jiffies,
840 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
841 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
842 .maxlen = sizeof(unsigned int),
844 .proc_handler = proc_dointvec_jiffies,
846 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
847 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
848 .maxlen = sizeof(unsigned int),
850 .proc_handler = proc_dointvec_jiffies,
852 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
853 .procname = "nf_conntrack_sctp_timeout_heartbeat_acked",
854 .maxlen = sizeof(unsigned int),
856 .proc_handler = proc_dointvec_jiffies,
859 #ifdef CONFIG_NF_CT_PROTO_DCCP
860 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
861 .procname = "nf_conntrack_dccp_timeout_request",
862 .maxlen = sizeof(unsigned int),
864 .proc_handler = proc_dointvec_jiffies,
866 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
867 .procname = "nf_conntrack_dccp_timeout_respond",
868 .maxlen = sizeof(unsigned int),
870 .proc_handler = proc_dointvec_jiffies,
872 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
873 .procname = "nf_conntrack_dccp_timeout_partopen",
874 .maxlen = sizeof(unsigned int),
876 .proc_handler = proc_dointvec_jiffies,
878 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
879 .procname = "nf_conntrack_dccp_timeout_open",
880 .maxlen = sizeof(unsigned int),
882 .proc_handler = proc_dointvec_jiffies,
884 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
885 .procname = "nf_conntrack_dccp_timeout_closereq",
886 .maxlen = sizeof(unsigned int),
888 .proc_handler = proc_dointvec_jiffies,
890 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
891 .procname = "nf_conntrack_dccp_timeout_closing",
892 .maxlen = sizeof(unsigned int),
894 .proc_handler = proc_dointvec_jiffies,
896 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
897 .procname = "nf_conntrack_dccp_timeout_timewait",
898 .maxlen = sizeof(unsigned int),
900 .proc_handler = proc_dointvec_jiffies,
902 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
903 .procname = "nf_conntrack_dccp_loose",
904 .maxlen = sizeof(int),
906 .proc_handler = proc_dointvec_minmax,
911 #ifdef CONFIG_NF_CT_PROTO_GRE
912 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
913 .procname = "nf_conntrack_gre_timeout",
914 .maxlen = sizeof(unsigned int),
916 .proc_handler = proc_dointvec_jiffies,
918 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
919 .procname = "nf_conntrack_gre_timeout_stream",
920 .maxlen = sizeof(unsigned int),
922 .proc_handler = proc_dointvec_jiffies,
928 static struct ctl_table nf_ct_netfilter_table[] = {
930 .procname = "nf_conntrack_max",
931 .data = &nf_conntrack_max,
932 .maxlen = sizeof(int),
934 .proc_handler = proc_dointvec,
939 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
940 struct ctl_table *table)
942 struct nf_tcp_net *tn = nf_tcp_pernet(net);
944 #define XASSIGN(XNAME, tn) \
945 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
946 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
948 XASSIGN(SYN_SENT, tn);
949 XASSIGN(SYN_RECV, tn);
950 XASSIGN(ESTABLISHED, tn);
951 XASSIGN(FIN_WAIT, tn);
952 XASSIGN(CLOSE_WAIT, tn);
953 XASSIGN(LAST_ACK, tn);
954 XASSIGN(TIME_WAIT, tn);
956 XASSIGN(RETRANS, tn);
959 #define XASSIGN(XNAME, rval) \
960 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
962 XASSIGN(LOOSE, &tn->tcp_loose);
963 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
964 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
968 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
969 struct ctl_table *table)
971 #ifdef CONFIG_NF_CT_PROTO_SCTP
972 struct nf_sctp_net *sn = nf_sctp_pernet(net);
974 #define XASSIGN(XNAME, sn) \
975 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
976 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
979 XASSIGN(COOKIE_WAIT, sn);
980 XASSIGN(COOKIE_ECHOED, sn);
981 XASSIGN(ESTABLISHED, sn);
982 XASSIGN(SHUTDOWN_SENT, sn);
983 XASSIGN(SHUTDOWN_RECD, sn);
984 XASSIGN(SHUTDOWN_ACK_SENT, sn);
985 XASSIGN(HEARTBEAT_SENT, sn);
986 XASSIGN(HEARTBEAT_ACKED, sn);
991 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
992 struct ctl_table *table)
994 #ifdef CONFIG_NF_CT_PROTO_DCCP
995 struct nf_dccp_net *dn = nf_dccp_pernet(net);
997 #define XASSIGN(XNAME, dn) \
998 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
999 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1001 XASSIGN(REQUEST, dn);
1002 XASSIGN(RESPOND, dn);
1003 XASSIGN(PARTOPEN, dn);
1005 XASSIGN(CLOSEREQ, dn);
1006 XASSIGN(CLOSING, dn);
1007 XASSIGN(TIMEWAIT, dn);
1010 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1014 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1015 struct ctl_table *table)
1017 #ifdef CONFIG_NF_CT_PROTO_GRE
1018 struct nf_gre_net *gn = nf_gre_pernet(net);
1020 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1021 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1025 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1027 struct nf_udp_net *un = nf_udp_pernet(net);
1028 struct ctl_table *table;
1030 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1032 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1037 table[NF_SYSCTL_CT_COUNT].data = &net->ct.count;
1038 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1039 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1040 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1041 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1043 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1044 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1045 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1046 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1047 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1049 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1050 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1051 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1052 nf_conntrack_standalone_init_gre_sysctl(net, table);
1054 /* Don't export sysctls to unprivileged users */
1055 if (net->user_ns != &init_user_ns) {
1056 table[NF_SYSCTL_CT_MAX].procname = NULL;
1057 table[NF_SYSCTL_CT_ACCT].procname = NULL;
1058 table[NF_SYSCTL_CT_HELPER].procname = NULL;
1059 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1060 table[NF_SYSCTL_CT_TIMESTAMP].procname = NULL;
1062 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1063 table[NF_SYSCTL_CT_EVENTS].procname = NULL;
1067 if (!net_eq(&init_net, net))
1068 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1070 net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1071 if (!net->ct.sysctl_header)
1072 goto out_unregister_netfilter;
1076 out_unregister_netfilter:
1081 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1083 struct ctl_table *table;
1085 table = net->ct.sysctl_header->ctl_table_arg;
1086 unregister_net_sysctl_table(net->ct.sysctl_header);
1090 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1095 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1098 #endif /* CONFIG_SYSCTL */
1100 static void nf_conntrack_fini_net(struct net *net)
1103 nf_ct_netns_put(net, NFPROTO_INET);
1105 nf_conntrack_standalone_fini_proc(net);
1106 nf_conntrack_standalone_fini_sysctl(net);
1109 static int nf_conntrack_pernet_init(struct net *net)
1113 net->ct.sysctl_checksum = 1;
1115 ret = nf_conntrack_standalone_init_sysctl(net);
1119 ret = nf_conntrack_standalone_init_proc(net);
1123 ret = nf_conntrack_init_net(net);
1128 ret = nf_ct_netns_get(net, NFPROTO_INET);
1136 nf_conntrack_cleanup_net(net);
1138 nf_conntrack_standalone_fini_proc(net);
1140 nf_conntrack_standalone_fini_sysctl(net);
1144 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1148 list_for_each_entry(net, net_exit_list, exit_list)
1149 nf_conntrack_fini_net(net);
1151 nf_conntrack_cleanup_net_list(net_exit_list);
1154 static struct pernet_operations nf_conntrack_net_ops = {
1155 .init = nf_conntrack_pernet_init,
1156 .exit_batch = nf_conntrack_pernet_exit,
1157 .id = &nf_conntrack_net_id,
1158 .size = sizeof(struct nf_conntrack_net),
1161 static int __init nf_conntrack_standalone_init(void)
1163 int ret = nf_conntrack_init_start();
1167 BUILD_BUG_ON(SKB_NFCT_PTRMASK != NFCT_PTRMASK);
1168 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1170 #ifdef CONFIG_SYSCTL
1171 nf_ct_netfilter_header =
1172 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1173 if (!nf_ct_netfilter_header) {
1174 pr_err("nf_conntrack: can't register to sysctl.\n");
1179 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1182 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1186 nf_conntrack_init_end();
1190 #ifdef CONFIG_SYSCTL
1191 unregister_net_sysctl_table(nf_ct_netfilter_header);
1194 nf_conntrack_cleanup_end();
1199 static void __exit nf_conntrack_standalone_fini(void)
1201 nf_conntrack_cleanup_start();
1202 unregister_pernet_subsys(&nf_conntrack_net_ops);
1203 #ifdef CONFIG_SYSCTL
1204 unregister_net_sysctl_table(nf_ct_netfilter_header);
1206 nf_conntrack_cleanup_end();
1209 module_init(nf_conntrack_standalone_init);
1210 module_exit(nf_conntrack_standalone_fini);