blob: 050bb3420a6baf2e75f1b6eac080fe0b92b7e6f6 [file] [log] [blame]
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001/* Connection tracking via netlink socket. Allows for user space
2 * protocol helpers and general trouble making from userspace.
3 *
4 * (C) 2001 by Jay Schulist <jschlst@samba.org>
Harald Weltedc808fe2006-03-20 17:56:32 -08005 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08006 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02007 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08008 *
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08009 * Initial connection tracking via netlink development funded and
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080010 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
11 *
12 * Further development of this code funded by Astaro AG (http://www.astaro.com)
13 *
14 * This software may be used and distributed according to the terms
15 * of the GNU General Public License, incorporated herein by reference.
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080016 */
17
18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
Ingo Molnar711bbdd2008-05-17 08:26:25 +020021#include <linux/rculist.h>
Eric Dumazetea781f12009-03-25 21:05:46 +010022#include <linux/rculist_nulls.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080023#include <linux/types.h>
24#include <linux/timer.h>
Eric Paris1cc63242010-10-13 16:24:54 -040025#include <linux/security.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080026#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/netlink.h>
29#include <linux/spinlock.h>
Yasuyuki Kozakai40a839f2006-06-27 03:00:35 -070030#include <linux/interrupt.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090031#include <linux/slab.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080032
33#include <linux/netfilter.h>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070034#include <net/netlink.h>
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +010035#include <net/sock.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080036#include <net/netfilter/nf_conntrack.h>
37#include <net/netfilter/nf_conntrack_core.h>
Martin Josefsson77ab9cf2006-11-29 02:34:58 +010038#include <net/netfilter/nf_conntrack_expect.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080039#include <net/netfilter/nf_conntrack_helper.h>
Patrick McHardy41d73ec2013-08-27 08:50:12 +020040#include <net/netfilter/nf_conntrack_seqadj.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080041#include <net/netfilter/nf_conntrack_l3proto.h>
Martin Josefsson605dcad2006-11-29 02:35:06 +010042#include <net/netfilter/nf_conntrack_l4proto.h>
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -080043#include <net/netfilter/nf_conntrack_tuple.h>
Krzysztof Piotr Oledzki58401572008-07-21 10:01:34 -070044#include <net/netfilter/nf_conntrack_acct.h>
Patrick McHardyef00f892010-02-15 18:14:57 +010045#include <net/netfilter/nf_conntrack_zones.h>
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +010046#include <net/netfilter/nf_conntrack_timestamp.h>
Florian Westphalc539f012013-01-11 06:30:44 +000047#include <net/netfilter/nf_conntrack_labels.h>
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -080048#ifdef CONFIG_NF_NAT_NEEDED
49#include <net/netfilter/nf_nat_core.h>
Patrick McHardyc7232c92012-08-26 19:14:06 +020050#include <net/netfilter/nf_nat_l4proto.h>
Pablo Neira Ayuso8c88f872012-06-07 13:31:25 +020051#include <net/netfilter/nf_nat_helper.h>
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -080052#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080053
54#include <linux/netfilter/nfnetlink.h>
55#include <linux/netfilter/nfnetlink_conntrack.h>
56
57MODULE_LICENSE("GPL");
58
Harald Weltedc808fe2006-03-20 17:56:32 -080059static char __initdata version[] = "0.93";
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080060
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +020061static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
62 const struct nf_conntrack_tuple *tuple,
63 struct nf_conntrack_l4proto *l4proto)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080064{
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080065 int ret = 0;
Patrick McHardydf6fb862007-09-28 14:37:03 -070066 struct nlattr *nest_parms;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080067
Patrick McHardydf6fb862007-09-28 14:37:03 -070068 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
69 if (!nest_parms)
70 goto nla_put_failure;
David S. Millercc1eb432012-04-01 18:57:48 -040071 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
72 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080073
Patrick McHardyfdf70832007-09-28 14:37:41 -070074 if (likely(l4proto->tuple_to_nlattr))
75 ret = l4proto->tuple_to_nlattr(skb, tuple);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -080076
Patrick McHardydf6fb862007-09-28 14:37:03 -070077 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080078
79 return ret;
80
Patrick McHardydf6fb862007-09-28 14:37:03 -070081nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080082 return -1;
83}
84
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +020085static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
86 const struct nf_conntrack_tuple *tuple,
87 struct nf_conntrack_l3proto *l3proto)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080088{
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080089 int ret = 0;
Patrick McHardydf6fb862007-09-28 14:37:03 -070090 struct nlattr *nest_parms;
91
92 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
93 if (!nest_parms)
94 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -080095
Patrick McHardyfdf70832007-09-28 14:37:41 -070096 if (likely(l3proto->tuple_to_nlattr))
97 ret = l3proto->tuple_to_nlattr(skb, tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080098
Patrick McHardydf6fb862007-09-28 14:37:03 -070099 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800100
101 return ret;
102
Patrick McHardydf6fb862007-09-28 14:37:03 -0700103nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800104 return -1;
105}
106
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200107static int ctnetlink_dump_tuples(struct sk_buff *skb,
108 const struct nf_conntrack_tuple *tuple)
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800109{
110 int ret;
111 struct nf_conntrack_l3proto *l3proto;
Martin Josefsson605dcad2006-11-29 02:35:06 +0100112 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800113
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000114 rcu_read_lock();
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100115 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800116 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800117
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000118 if (ret >= 0) {
119 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
120 tuple->dst.protonum);
121 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
122 }
123 rcu_read_unlock();
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800124 return ret;
125}
126
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200127static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
128 const struct nf_conntrack_zone *zone, int dir)
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200129{
130 if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
131 return 0;
132 if (nla_put_be16(skb, attrtype, htons(zone->id)))
133 goto nla_put_failure;
134 return 0;
135
136nla_put_failure:
137 return -1;
138}
139
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200140static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800141{
David S. Millercc1eb432012-04-01 18:57:48 -0400142 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
143 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800144 return 0;
145
Patrick McHardydf6fb862007-09-28 14:37:03 -0700146nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800147 return -1;
148}
149
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200150static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800151{
Xi Wangc1216382011-12-30 10:40:17 -0500152 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800153
Patrick McHardy77236b62007-12-17 22:29:45 -0800154 if (timeout < 0)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800155 timeout = 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800156
David S. Millercc1eb432012-04-01 18:57:48 -0400157 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
158 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800159 return 0;
160
Patrick McHardydf6fb862007-09-28 14:37:03 -0700161nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800162 return -1;
163}
164
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200165static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800166{
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200167 struct nf_conntrack_l4proto *l4proto;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700168 struct nlattr *nest_proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800169 int ret;
170
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100171 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
172 if (!l4proto->to_nlattr)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800173 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800174
Patrick McHardydf6fb862007-09-28 14:37:03 -0700175 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
176 if (!nest_proto)
177 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800178
Patrick McHardyfdf70832007-09-28 14:37:41 -0700179 ret = l4proto->to_nlattr(skb, nest_proto, ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800180
Patrick McHardydf6fb862007-09-28 14:37:03 -0700181 nla_nest_end(skb, nest_proto);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800182
183 return ret;
184
Patrick McHardydf6fb862007-09-28 14:37:03 -0700185nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800186 return -1;
187}
188
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200189static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
190 const struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800191{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700192 struct nlattr *nest_helper;
Harald Weltedc808fe2006-03-20 17:56:32 -0800193 const struct nf_conn_help *help = nfct_help(ct);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700194 struct nf_conntrack_helper *helper;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800195
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700196 if (!help)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800197 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800198
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700199 helper = rcu_dereference(help->helper);
200 if (!helper)
201 goto out;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800202
Patrick McHardydf6fb862007-09-28 14:37:03 -0700203 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
204 if (!nest_helper)
205 goto nla_put_failure;
David S. Millercc1eb432012-04-01 18:57:48 -0400206 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
207 goto nla_put_failure;
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700208
Patrick McHardyfdf70832007-09-28 14:37:41 -0700209 if (helper->to_nlattr)
210 helper->to_nlattr(skb, ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800211
Patrick McHardydf6fb862007-09-28 14:37:03 -0700212 nla_nest_end(skb, nest_helper);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700213out:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800214 return 0;
215
Patrick McHardydf6fb862007-09-28 14:37:03 -0700216nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800217 return -1;
218}
219
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800220static int
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200221dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
222 enum ip_conntrack_dir dir, int type)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800223{
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200224 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
225 struct nf_conn_counter *counter = acct->counter;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700226 struct nlattr *nest_count;
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200227 u64 pkts, bytes;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800228
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200229 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
230 pkts = atomic64_xchg(&counter[dir].packets, 0);
231 bytes = atomic64_xchg(&counter[dir].bytes, 0);
232 } else {
233 pkts = atomic64_read(&counter[dir].packets);
234 bytes = atomic64_read(&counter[dir].bytes);
235 }
236
237 nest_count = nla_nest_start(skb, attr | NLA_F_NESTED);
Patrick McHardydf6fb862007-09-28 14:37:03 -0700238 if (!nest_count)
239 goto nla_put_failure;
240
Nicolas Dichtelb46f6de2016-04-22 17:31:18 +0200241 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
242 CTA_COUNTERS_PAD) ||
243 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
244 CTA_COUNTERS_PAD))
David S. Millercc1eb432012-04-01 18:57:48 -0400245 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800246
Patrick McHardydf6fb862007-09-28 14:37:03 -0700247 nla_nest_end(skb, nest_count);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800248
249 return 0;
250
Patrick McHardydf6fb862007-09-28 14:37:03 -0700251nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800252 return -1;
253}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800254
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100255static int
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200256ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100257{
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200258 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100259
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100260 if (!acct)
261 return 0;
262
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200263 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
264 return -1;
265 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
266 return -1;
267
268 return 0;
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100269}
270
271static int
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100272ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
273{
274 struct nlattr *nest_count;
275 const struct nf_conn_tstamp *tstamp;
276
277 tstamp = nf_conn_tstamp_find(ct);
278 if (!tstamp)
279 return 0;
280
281 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
282 if (!nest_count)
283 goto nla_put_failure;
284
Nicolas Dichtelb46f6de2016-04-22 17:31:18 +0200285 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
286 CTA_TIMESTAMP_PAD) ||
David S. Millercc1eb432012-04-01 18:57:48 -0400287 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
Nicolas Dichtelb46f6de2016-04-22 17:31:18 +0200288 cpu_to_be64(tstamp->stop),
289 CTA_TIMESTAMP_PAD)))
David S. Millercc1eb432012-04-01 18:57:48 -0400290 goto nla_put_failure;
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100291 nla_nest_end(skb, nest_count);
292
293 return 0;
294
295nla_put_failure:
296 return -1;
297}
298
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800299#ifdef CONFIG_NF_CONNTRACK_MARK
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200300static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800301{
David S. Millercc1eb432012-04-01 18:57:48 -0400302 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
303 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800304 return 0;
305
Patrick McHardydf6fb862007-09-28 14:37:03 -0700306nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800307 return -1;
308}
309#else
310#define ctnetlink_dump_mark(a, b) (0)
311#endif
312
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800313#ifdef CONFIG_NF_CONNTRACK_SECMARK
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200314static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800315{
Eric Paris1cc63242010-10-13 16:24:54 -0400316 struct nlattr *nest_secctx;
317 int len, ret;
318 char *secctx;
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800319
Eric Paris1cc63242010-10-13 16:24:54 -0400320 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
321 if (ret)
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800322 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400323
324 ret = -1;
325 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
326 if (!nest_secctx)
327 goto nla_put_failure;
328
David S. Millercc1eb432012-04-01 18:57:48 -0400329 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
330 goto nla_put_failure;
Eric Paris1cc63242010-10-13 16:24:54 -0400331 nla_nest_end(skb, nest_secctx);
332
333 ret = 0;
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800334nla_put_failure:
Eric Paris1cc63242010-10-13 16:24:54 -0400335 security_release_secctx(secctx, len);
336 return ret;
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800337}
338#else
Eric Paris1cc63242010-10-13 16:24:54 -0400339#define ctnetlink_dump_secctx(a, b) (0)
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800340#endif
341
Florian Westphal0ceabd82013-01-11 06:30:45 +0000342#ifdef CONFIG_NF_CONNTRACK_LABELS
Pablo Neira Ayuso4a963002016-04-15 12:24:57 +0200343static inline int ctnetlink_label_size(const struct nf_conn *ct)
Florian Westphal0ceabd82013-01-11 06:30:45 +0000344{
345 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
346
347 if (!labels)
348 return 0;
Florian Westphal23014012016-07-21 12:51:16 +0200349 return nla_total_size(sizeof(labels->bits));
Florian Westphal0ceabd82013-01-11 06:30:45 +0000350}
351
352static int
353ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
354{
355 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
Florian Westphal23014012016-07-21 12:51:16 +0200356 unsigned int i;
Florian Westphal0ceabd82013-01-11 06:30:45 +0000357
358 if (!labels)
359 return 0;
360
Florian Westphal0ceabd82013-01-11 06:30:45 +0000361 i = 0;
362 do {
363 if (labels->bits[i] != 0)
Florian Westphal23014012016-07-21 12:51:16 +0200364 return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
365 labels->bits);
Florian Westphal0ceabd82013-01-11 06:30:45 +0000366 i++;
Florian Westphal23014012016-07-21 12:51:16 +0200367 } while (i < ARRAY_SIZE(labels->bits));
Florian Westphal0ceabd82013-01-11 06:30:45 +0000368
369 return 0;
370}
371#else
372#define ctnetlink_dump_labels(a, b) (0)
373#define ctnetlink_label_size(a) (0)
374#endif
375
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800376#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
377
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200378static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800379{
380 struct nlattr *nest_parms;
381
382 if (!(ct->status & IPS_EXPECTED))
383 return 0;
384
385 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
386 if (!nest_parms)
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);
391
392 return 0;
393
394nla_put_failure:
395 return -1;
396}
397
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800398static int
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200399dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800400{
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800401 struct nlattr *nest_parms;
402
403 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
404 if (!nest_parms)
405 goto nla_put_failure;
406
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200407 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)))
David S. Millercc1eb432012-04-01 18:57:48 -0400413 goto nla_put_failure;
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800414
415 nla_nest_end(skb, nest_parms);
416
417 return 0;
418
419nla_put_failure:
420 return -1;
421}
422
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200423static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb,
424 const struct nf_conn *ct)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800425{
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200426 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
427 struct nf_ct_seqadj *seq;
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800428
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200429 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800430 return 0;
431
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200432 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
433 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800434 return -1;
435
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200436 seq = &seqadj->seq[IP_CT_DIR_REPLY];
437 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800438 return -1;
439
440 return 0;
441}
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800442
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200443static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800444{
David S. Millercc1eb432012-04-01 18:57:48 -0400445 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
446 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800447 return 0;
448
Patrick McHardydf6fb862007-09-28 14:37:03 -0700449nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800450 return -1;
451}
452
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200453static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800454{
David S. Millercc1eb432012-04-01 18:57:48 -0400455 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
456 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800457 return 0;
458
Patrick McHardydf6fb862007-09-28 14:37:03 -0700459nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800460 return -1;
461}
462
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800463static int
Eric W. Biederman15e47302012-09-07 20:12:54 +0000464ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100465 struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800466{
Daniel Borkmann308ac912015-08-08 21:40:01 +0200467 const struct nf_conntrack_zone *zone;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800468 struct nlmsghdr *nlh;
469 struct nfgenmsg *nfmsg;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700470 struct nlattr *nest_parms;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000471 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800472
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100473 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
Eric W. Biederman15e47302012-09-07 20:12:54 +0000474 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200475 if (nlh == NULL)
476 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800477
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200478 nfmsg = nlmsg_data(nlh);
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200479 nfmsg->nfgen_family = nf_ct_l3num(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800480 nfmsg->version = NFNETLINK_V0;
481 nfmsg->res_id = 0;
482
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200483 zone = nf_ct_zone(ct);
484
Patrick McHardydf6fb862007-09-28 14:37:03 -0700485 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
486 if (!nest_parms)
487 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200488 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700489 goto nla_put_failure;
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200490 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
491 NF_CT_ZONE_DIR_ORIG) < 0)
492 goto nla_put_failure;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700493 nla_nest_end(skb, nest_parms);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800494
Patrick McHardydf6fb862007-09-28 14:37:03 -0700495 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
496 if (!nest_parms)
497 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200498 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700499 goto nla_put_failure;
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200500 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
501 NF_CT_ZONE_DIR_REPL) < 0)
502 goto nla_put_failure;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700503 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800504
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200505 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
506 NF_CT_DEFAULT_ZONE_DIR) < 0)
David S. Millercc1eb432012-04-01 18:57:48 -0400507 goto nla_put_failure;
Patrick McHardyef00f892010-02-15 18:14:57 +0100508
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800509 if (ctnetlink_dump_status(skb, ct) < 0 ||
510 ctnetlink_dump_timeout(skb, ct) < 0 ||
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200511 ctnetlink_dump_acct(skb, ct, type) < 0 ||
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100512 ctnetlink_dump_timestamp(skb, ct) < 0 ||
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800513 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
514 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
515 ctnetlink_dump_mark(skb, ct) < 0 ||
Eric Paris1cc63242010-10-13 16:24:54 -0400516 ctnetlink_dump_secctx(skb, ct) < 0 ||
Florian Westphal0ceabd82013-01-11 06:30:45 +0000517 ctnetlink_dump_labels(skb, ct) < 0 ||
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800518 ctnetlink_dump_id(skb, ct) < 0 ||
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800519 ctnetlink_dump_use(skb, ct) < 0 ||
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800520 ctnetlink_dump_master(skb, ct) < 0 ||
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200521 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700522 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800523
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200524 nlmsg_end(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800525 return skb->len;
526
527nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -0700528nla_put_failure:
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200529 nlmsg_cancel(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800530 return -1;
531}
532
Pablo Neira Ayuso4a963002016-04-15 12:24:57 +0200533static inline size_t ctnetlink_proto_size(const struct nf_conn *ct)
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100534{
535 struct nf_conntrack_l3proto *l3proto;
536 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200537 size_t len = 0;
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100538
539 rcu_read_lock();
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200540 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100541 len += l3proto->nla_size;
542
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200543 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100544 len += l4proto->nla_size;
545 rcu_read_unlock();
546
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200547 return len;
548}
549
Pablo Neira Ayuso4a963002016-04-15 12:24:57 +0200550static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200551{
552 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
553 return 0;
554 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
Nicolas Dichtelb46f6de2016-04-22 17:31:18 +0200555 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
556 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200557 ;
558}
559
Pablo Neira Ayuso4a963002016-04-15 12:24:57 +0200560static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
Eric Paris1cc63242010-10-13 16:24:54 -0400561{
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800562#ifdef CONFIG_NF_CONNTRACK_SECMARK
563 int len, ret;
Eric Paris1cc63242010-10-13 16:24:54 -0400564
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800565 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
566 if (ret)
567 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400568
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800569 return nla_total_size(0) /* CTA_SECCTX */
570 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
571#else
572 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400573#endif
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800574}
Eric Paris1cc63242010-10-13 16:24:54 -0400575
Pablo Neira Ayuso4a963002016-04-15 12:24:57 +0200576static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100577{
578#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
579 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
580 return 0;
Nicolas Dichtelb46f6de2016-04-22 17:31:18 +0200581 return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100582#else
583 return 0;
584#endif
585}
586
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200587#ifdef CONFIG_NF_CONNTRACK_EVENTS
588static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200589{
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 */
Holger Eitzenbergerf7b13e42013-09-26 17:31:51 +0200597 + ctnetlink_acct_size(ct)
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100598 + ctnetlink_timestamp_size(ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200599 + 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 */
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800603 + ctnetlink_secctx_size(ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200604#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 */
607#endif
608#ifdef CONFIG_NF_CONNTRACK_MARK
609 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
610#endif
Ken-ichirou MATSUZAWA4a001062014-06-16 13:52:34 +0200611#ifdef CONFIG_NF_CONNTRACK_ZONES
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200612 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
Ken-ichirou MATSUZAWA4a001062014-06-16 13:52:34 +0200613#endif
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200614 + ctnetlink_proto_size(ct)
Florian Westphal0ceabd82013-01-11 06:30:45 +0000615 + ctnetlink_label_size(ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200616 ;
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100617}
618
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200619static int
620ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800621{
Daniel Borkmann308ac912015-08-08 21:40:01 +0200622 const struct nf_conntrack_zone *zone;
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100623 struct net *net;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800624 struct nlmsghdr *nlh;
625 struct nfgenmsg *nfmsg;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700626 struct nlattr *nest_parms;
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +0100627 struct nf_conn *ct = item->ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800628 struct sk_buff *skb;
629 unsigned int type;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800630 unsigned int flags = 0, group;
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200631 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800632
633 /* ignore our fake conntrack entry */
Eric Dumazet5bfddbd2010-06-08 16:09:52 +0200634 if (nf_ct_is_untracked(ct))
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200635 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800636
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200637 if (events & (1 << IPCT_DESTROY)) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800638 type = IPCTNL_MSG_CT_DELETE;
639 group = NFNLGRP_CONNTRACK_DESTROY;
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200640 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800641 type = IPCTNL_MSG_CT_NEW;
642 flags = NLM_F_CREATE|NLM_F_EXCL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800643 group = NFNLGRP_CONNTRACK_NEW;
Pablo Neira Ayuso17e6e4e2009-06-02 20:08:46 +0200644 } else if (events) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800645 type = IPCTNL_MSG_CT_NEW;
646 group = NFNLGRP_CONNTRACK_UPDATE;
647 } else
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200648 return 0;
Patrick McHardya2427692006-03-20 18:03:59 -0800649
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100650 net = nf_ct_net(ct);
651 if (!item->report && !nfnetlink_has_listeners(net, group))
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200652 return 0;
Patrick McHardya2427692006-03-20 18:03:59 -0800653
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200654 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
655 if (skb == NULL)
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +0200656 goto errout;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800657
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800658 type |= NFNL_SUBSYS_CTNETLINK << 8;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000659 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200660 if (nlh == NULL)
661 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800662
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200663 nfmsg = nlmsg_data(nlh);
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200664 nfmsg->nfgen_family = nf_ct_l3num(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800665 nfmsg->version = NFNETLINK_V0;
666 nfmsg->res_id = 0;
667
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100668 rcu_read_lock();
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200669 zone = nf_ct_zone(ct);
670
Patrick McHardydf6fb862007-09-28 14:37:03 -0700671 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
672 if (!nest_parms)
673 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200674 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700675 goto nla_put_failure;
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200676 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
677 NF_CT_ZONE_DIR_ORIG) < 0)
678 goto nla_put_failure;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700679 nla_nest_end(skb, nest_parms);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800680
Patrick McHardydf6fb862007-09-28 14:37:03 -0700681 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
682 if (!nest_parms)
683 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200684 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700685 goto nla_put_failure;
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200686 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
687 NF_CT_ZONE_DIR_REPL) < 0)
688 goto nla_put_failure;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700689 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800690
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200691 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
692 NF_CT_DEFAULT_ZONE_DIR) < 0)
David S. Millercc1eb432012-04-01 18:57:48 -0400693 goto nla_put_failure;
Patrick McHardyef00f892010-02-15 18:14:57 +0100694
Eric Leblond1eedf692008-05-13 23:27:11 -0700695 if (ctnetlink_dump_id(skb, ct) < 0)
696 goto nla_put_failure;
697
Fabian Hugelshofere57dce62008-06-09 15:59:58 -0700698 if (ctnetlink_dump_status(skb, ct) < 0)
699 goto nla_put_failure;
700
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200701 if (events & (1 << IPCT_DESTROY)) {
Holger Eitzenberger4542fa42013-09-26 17:31:52 +0200702 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100703 ctnetlink_dump_timestamp(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700704 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100705 } else {
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100706 if (ctnetlink_dump_timeout(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700707 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100708
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200709 if (events & (1 << IPCT_PROTOINFO)
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100710 && ctnetlink_dump_protoinfo(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700711 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100712
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200713 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100714 && ctnetlink_dump_helpinfo(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700715 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100716
Eric Parisff660c82010-10-19 18:17:32 -0400717#ifdef CONFIG_NF_CONNTRACK_SECMARK
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200718 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
Eric Paris1cc63242010-10-13 16:24:54 -0400719 && ctnetlink_dump_secctx(skb, ct) < 0)
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800720 goto nla_put_failure;
Eric Parisff660c82010-10-19 18:17:32 -0400721#endif
Florian Westphal0ceabd82013-01-11 06:30:45 +0000722 if (events & (1 << IPCT_LABEL) &&
723 ctnetlink_dump_labels(skb, ct) < 0)
724 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100725
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200726 if (events & (1 << IPCT_RELATED) &&
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800727 ctnetlink_dump_master(skb, ct) < 0)
728 goto nla_put_failure;
729
Patrick McHardy41d73ec2013-08-27 08:50:12 +0200730 if (events & (1 << IPCT_SEQADJ) &&
731 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800732 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100733 }
Pablo Neira Ayusob9a37e02006-08-22 00:31:49 -0700734
Eric Leblonda83099a2008-01-31 04:44:27 -0800735#ifdef CONFIG_NF_CONNTRACK_MARK
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200736 if ((events & (1 << IPCT_MARK) || ct->mark)
Eric Leblonda83099a2008-01-31 04:44:27 -0800737 && ctnetlink_dump_mark(skb, ct) < 0)
738 goto nla_put_failure;
739#endif
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100740 rcu_read_unlock();
Eric Leblonda83099a2008-01-31 04:44:27 -0800741
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200742 nlmsg_end(skb, nlh);
Eric W. Biederman15e47302012-09-07 20:12:54 +0000743 err = nfnetlink_send(skb, net, item->portid, group, item->report,
Alexey Dobriyancd8c20b2010-01-13 16:02:14 +0100744 GFP_ATOMIC);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200745 if (err == -ENOBUFS || err == -EAGAIN)
746 return -ENOBUFS;
747
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200748 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800749
Patrick McHardydf6fb862007-09-28 14:37:03 -0700750nla_put_failure:
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100751 rcu_read_unlock();
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200752 nlmsg_cancel(skb, nlh);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100753nlmsg_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800754 kfree_skb(skb);
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +0200755errout:
Pablo Neira Ayuso37b7ef72010-03-16 13:30:21 +0000756 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
757 return -ENOBUFS;
758
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200759 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800760}
761#endif /* CONFIG_NF_CONNTRACK_EVENTS */
762
763static int ctnetlink_done(struct netlink_callback *cb)
764{
Patrick McHardy89f2e212006-05-29 18:24:58 -0700765 if (cb->args[1])
766 nf_ct_put((struct nf_conn *)cb->args[1]);
Fabian Frederick397304b2014-06-20 22:38:58 +0200767 kfree(cb->data);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800768 return 0;
769}
770
Kristian Evensen866476f2014-12-24 09:57:10 +0100771struct ctnetlink_filter {
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000772 struct {
773 u_int32_t val;
774 u_int32_t mask;
775 } mark;
776};
777
Kristian Evensen866476f2014-12-24 09:57:10 +0100778static struct ctnetlink_filter *
779ctnetlink_alloc_filter(const struct nlattr * const cda[])
780{
781#ifdef CONFIG_NF_CONNTRACK_MARK
782 struct ctnetlink_filter *filter;
783
784 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
785 if (filter == NULL)
786 return ERR_PTR(-ENOMEM);
787
788 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
789 filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
790
791 return filter;
792#else
793 return ERR_PTR(-EOPNOTSUPP);
794#endif
795}
796
797static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
798{
799 struct ctnetlink_filter *filter = data;
800
801 if (filter == NULL)
802 return 1;
803
804#ifdef CONFIG_NF_CONNTRACK_MARK
805 if ((ct->mark & filter->mark.mask) == filter->mark.val)
806 return 1;
807#endif
808
809 return 0;
810}
811
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800812static int
813ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
814{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100815 struct net *net = sock_net(skb->sk);
Patrick McHardy89f2e212006-05-29 18:24:58 -0700816 struct nf_conn *ct, *last;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800817 struct nf_conntrack_tuple_hash *h;
Eric Dumazetea781f12009-03-25 21:05:46 +0100818 struct hlist_nulls_node *n;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200819 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -0800820 u_int8_t l3proto = nfmsg->nfgen_family;
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000821 int res;
Jesper Dangaard Brouer93bb0ce2014-03-03 14:46:13 +0100822 spinlock_t *lockp;
823
Patrick McHardyd205dc42006-08-17 18:12:38 -0700824 last = (struct nf_conn *)cb->args[1];
Jesper Dangaard Brouer93bb0ce2014-03-03 14:46:13 +0100825
826 local_bh_disable();
Florian Westphal56d52d42016-05-02 18:39:55 +0200827 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
Patrick McHardy89f2e212006-05-29 18:24:58 -0700828restart:
Jesper Dangaard Brouer93bb0ce2014-03-03 14:46:13 +0100829 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
Sasha Levinb16c2912016-01-18 19:23:51 -0500830 nf_conntrack_lock(lockp);
Florian Westphal56d52d42016-05-02 18:39:55 +0200831 if (cb->args[0] >= nf_conntrack_htable_size) {
Jesper Dangaard Brouer93bb0ce2014-03-03 14:46:13 +0100832 spin_unlock(lockp);
833 goto out;
834 }
Florian Westphal56d52d42016-05-02 18:39:55 +0200835 hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
836 hnnode) {
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800837 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800838 continue;
839 ct = nf_ct_tuplehash_to_ctrack(h);
Florian Westphale0c7d472016-04-28 19:13:45 +0200840 if (!net_eq(net, nf_ct_net(ct)))
841 continue;
842
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -0800843 /* Dump entries of a given L3 protocol number.
844 * If it is not specified, ie. l3proto == 0,
845 * then dump everything. */
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200846 if (l3proto && nf_ct_l3num(ct) != l3proto)
Stephen Hemminger13ee6ac2011-01-11 23:54:42 +0100847 continue;
Patrick McHardyd205dc42006-08-17 18:12:38 -0700848 if (cb->args[1]) {
849 if (ct != last)
Stephen Hemminger13ee6ac2011-01-11 23:54:42 +0100850 continue;
Patrick McHardyd205dc42006-08-17 18:12:38 -0700851 cb->args[1] = 0;
Patrick McHardy89f2e212006-05-29 18:24:58 -0700852 }
Kristian Evensen866476f2014-12-24 09:57:10 +0100853 if (!ctnetlink_filter_match(ct, cb->data))
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000854 continue;
Kristian Evensen866476f2014-12-24 09:57:10 +0100855
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000856 rcu_read_lock();
857 res =
Eric W. Biederman15e47302012-09-07 20:12:54 +0000858 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000859 cb->nlh->nlmsg_seq,
860 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
861 ct);
862 rcu_read_unlock();
863 if (res < 0) {
Pablo Neira Ayusoc71caf42011-01-24 19:01:07 +0100864 nf_conntrack_get(&ct->ct_general);
Patrick McHardy89f2e212006-05-29 18:24:58 -0700865 cb->args[1] = (unsigned long)ct;
Jesper Dangaard Brouer93bb0ce2014-03-03 14:46:13 +0100866 spin_unlock(lockp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800867 goto out;
Patrick McHardy89f2e212006-05-29 18:24:58 -0700868 }
869 }
Jesper Dangaard Brouer93bb0ce2014-03-03 14:46:13 +0100870 spin_unlock(lockp);
Patrick McHardyd205dc42006-08-17 18:12:38 -0700871 if (cb->args[1]) {
Patrick McHardy89f2e212006-05-29 18:24:58 -0700872 cb->args[1] = 0;
873 goto restart;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800874 }
875 }
Patrick McHardy89f2e212006-05-29 18:24:58 -0700876out:
Jesper Dangaard Brouer93bb0ce2014-03-03 14:46:13 +0100877 local_bh_enable();
Patrick McHardyd205dc42006-08-17 18:12:38 -0700878 if (last)
879 nf_ct_put(last);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800880
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800881 return skb->len;
882}
883
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200884static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
885 struct nf_conntrack_tuple *tuple)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800886{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700887 struct nlattr *tb[CTA_IP_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800888 struct nf_conntrack_l3proto *l3proto;
889 int ret = 0;
890
Daniel Borkmann130ffbc2013-06-12 17:54:51 +0200891 ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
892 if (ret < 0)
893 return ret;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800894
Florian Westphalcd915662009-03-18 17:28:37 +0100895 rcu_read_lock();
896 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800897
Patrick McHardyf73e9242007-09-28 14:39:55 -0700898 if (likely(l3proto->nlattr_to_tuple)) {
899 ret = nla_validate_nested(attr, CTA_IP_MAX,
900 l3proto->nla_policy);
901 if (ret == 0)
902 ret = l3proto->nlattr_to_tuple(tb, tuple);
903 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800904
Florian Westphalcd915662009-03-18 17:28:37 +0100905 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800906
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800907 return ret;
908}
909
Patrick McHardyf73e9242007-09-28 14:39:55 -0700910static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
911 [CTA_PROTO_NUM] = { .type = NLA_U8 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800912};
913
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +0200914static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
915 struct nf_conntrack_tuple *tuple)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800916{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700917 struct nlattr *tb[CTA_PROTO_MAX+1];
Martin Josefsson605dcad2006-11-29 02:35:06 +0100918 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800919 int ret = 0;
920
Patrick McHardyf73e9242007-09-28 14:39:55 -0700921 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
922 if (ret < 0)
923 return ret;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800924
Patrick McHardydf6fb862007-09-28 14:37:03 -0700925 if (!tb[CTA_PROTO_NUM])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800926 return -EINVAL;
Patrick McHardy77236b62007-12-17 22:29:45 -0800927 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800928
Florian Westphalcd915662009-03-18 17:28:37 +0100929 rcu_read_lock();
930 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800931
Patrick McHardyf73e9242007-09-28 14:39:55 -0700932 if (likely(l4proto->nlattr_to_tuple)) {
933 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
934 l4proto->nla_policy);
935 if (ret == 0)
936 ret = l4proto->nlattr_to_tuple(tb, tuple);
937 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800938
Florian Westphalcd915662009-03-18 17:28:37 +0100939 rcu_read_unlock();
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800940
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800941 return ret;
942}
943
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200944static int
945ctnetlink_parse_zone(const struct nlattr *attr,
946 struct nf_conntrack_zone *zone)
947{
Daniel Borkmann5e8018f2015-08-14 16:03:40 +0200948 nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
949 NF_CT_DEFAULT_ZONE_DIR, 0);
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200950#ifdef CONFIG_NF_CONNTRACK_ZONES
951 if (attr)
952 zone->id = ntohs(nla_get_be16(attr));
953#else
954 if (attr)
955 return -EOPNOTSUPP;
956#endif
957 return 0;
958}
959
960static int
961ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
962 struct nf_conntrack_zone *zone)
963{
964 int ret;
965
966 if (zone->id != NF_CT_DEFAULT_ZONE_ID)
967 return -EINVAL;
968
969 ret = ctnetlink_parse_zone(attr, zone);
970 if (ret < 0)
971 return ret;
972
973 if (type == CTA_TUPLE_REPLY)
974 zone->dir = NF_CT_ZONE_DIR_REPL;
975 else
976 zone->dir = NF_CT_ZONE_DIR_ORIG;
977
978 return 0;
979}
980
Patrick McHardyd0b02682010-02-10 15:38:33 +0100981static 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 },
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200984 [CTA_TUPLE_ZONE] = { .type = NLA_U16 },
Patrick McHardyd0b02682010-02-10 15:38:33 +0100985};
986
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800987static int
Patrick McHardy39938322009-08-25 16:07:58 +0200988ctnetlink_parse_tuple(const struct nlattr * const cda[],
989 struct nf_conntrack_tuple *tuple,
Daniel Borkmanndeedb592015-08-14 16:03:39 +0200990 enum ctattr_type type, u_int8_t l3num,
991 struct nf_conntrack_zone *zone)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800992{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700993 struct nlattr *tb[CTA_TUPLE_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800994 int err;
995
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800996 memset(tuple, 0, sizeof(*tuple));
997
Daniel Borkmann130ffbc2013-06-12 17:54:51 +0200998 err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
999 if (err < 0)
1000 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001001
Patrick McHardydf6fb862007-09-28 14:37:03 -07001002 if (!tb[CTA_TUPLE_IP])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001003 return -EINVAL;
1004
1005 tuple->src.l3num = l3num;
1006
Patrick McHardydf6fb862007-09-28 14:37:03 -07001007 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001008 if (err < 0)
1009 return err;
1010
Patrick McHardydf6fb862007-09-28 14:37:03 -07001011 if (!tb[CTA_TUPLE_PROTO])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001012 return -EINVAL;
1013
Patrick McHardydf6fb862007-09-28 14:37:03 -07001014 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001015 if (err < 0)
1016 return err;
1017
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001018 if (tb[CTA_TUPLE_ZONE]) {
1019 if (!zone)
1020 return -EINVAL;
1021
1022 err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
1023 type, zone);
1024 if (err < 0)
1025 return err;
1026 }
1027
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001028 /* orig and expect tuples get DIR_ORIGINAL */
1029 if (type == CTA_TUPLE_REPLY)
1030 tuple->dst.dir = IP_CT_DIR_REPLY;
1031 else
1032 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
1033
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001034 return 0;
1035}
1036
Patrick McHardyd0b02682010-02-10 15:38:33 +01001037static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
Florian Westphal6d1fafc2012-11-22 01:32:46 +00001038 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
1039 .len = NF_CT_HELPER_NAME_LEN - 1 },
Patrick McHardyd0b02682010-02-10 15:38:33 +01001040};
1041
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +02001042static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
1043 struct nlattr **helpinfo)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001044{
Daniel Borkmann130ffbc2013-06-12 17:54:51 +02001045 int err;
Patrick McHardydf6fb862007-09-28 14:37:03 -07001046 struct nlattr *tb[CTA_HELP_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001047
Daniel Borkmann130ffbc2013-06-12 17:54:51 +02001048 err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
1049 if (err < 0)
1050 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001051
Patrick McHardydf6fb862007-09-28 14:37:03 -07001052 if (!tb[CTA_HELP_NAME])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001053 return -EINVAL;
1054
Patrick McHardydf6fb862007-09-28 14:37:03 -07001055 *helper_name = nla_data(tb[CTA_HELP_NAME]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001056
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001057 if (tb[CTA_HELP_INFO])
1058 *helpinfo = tb[CTA_HELP_INFO];
1059
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001060 return 0;
1061}
1062
Patrick McHardyf73e9242007-09-28 14:39:55 -07001063static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
Patrick McHardyd0b02682010-02-10 15:38:33 +01001064 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
1065 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -07001066 [CTA_STATUS] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +01001067 [CTA_PROTOINFO] = { .type = NLA_NESTED },
1068 [CTA_HELP] = { .type = NLA_NESTED },
1069 [CTA_NAT_SRC] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -07001070 [CTA_TIMEOUT] = { .type = NLA_U32 },
1071 [CTA_MARK] = { .type = NLA_U32 },
Patrick McHardyf73e9242007-09-28 14:39:55 -07001072 [CTA_ID] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +01001073 [CTA_NAT_DST] = { .type = NLA_NESTED },
1074 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
Florian Westphal6d1fafc2012-11-22 01:32:46 +00001075 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
1076 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
Patrick McHardyef00f892010-02-15 18:14:57 +01001077 [CTA_ZONE] = { .type = NLA_U16 },
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +00001078 [CTA_MARK_MASK] = { .type = NLA_U32 },
Florian Westphal9b21f6a2013-01-11 06:30:46 +00001079 [CTA_LABELS] = { .type = NLA_BINARY,
Florian Westphald2bf2f32014-02-18 15:25:32 +01001080 .len = NF_CT_LABELS_MAX_SIZE },
Florian Westphal9b21f6a2013-01-11 06:30:46 +00001081 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
Florian Westphald2bf2f32014-02-18 15:25:32 +01001082 .len = NF_CT_LABELS_MAX_SIZE },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001083};
1084
Kristian Evensen866476f2014-12-24 09:57:10 +01001085static int ctnetlink_flush_conntrack(struct net *net,
1086 const struct nlattr * const cda[],
1087 u32 portid, int report)
1088{
1089 struct ctnetlink_filter *filter = NULL;
1090
1091 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1092 filter = ctnetlink_alloc_filter(cda);
1093 if (IS_ERR(filter))
1094 return PTR_ERR(filter);
1095 }
1096
1097 nf_ct_iterate_cleanup(net, ctnetlink_filter_match, filter,
1098 portid, report);
1099 kfree(filter);
1100
1101 return 0;
1102}
1103
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01001104static 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[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001108{
1109 struct nf_conntrack_tuple_hash *h;
1110 struct nf_conntrack_tuple tuple;
1111 struct nf_conn *ct;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001112 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001113 u_int8_t u3 = nfmsg->nfgen_family;
Daniel Borkmann308ac912015-08-08 21:40:01 +02001114 struct nf_conntrack_zone zone;
Patrick McHardyef00f892010-02-15 18:14:57 +01001115 int err;
1116
1117 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1118 if (err < 0)
1119 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001120
Patrick McHardydf6fb862007-09-28 14:37:03 -07001121 if (cda[CTA_TUPLE_ORIG])
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001122 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1123 u3, &zone);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001124 else if (cda[CTA_TUPLE_REPLY])
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001125 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1126 u3, &zone);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001127 else {
Kristian Evensen866476f2014-12-24 09:57:10 +01001128 return ctnetlink_flush_conntrack(net, cda,
1129 NETLINK_CB(skb).portid,
1130 nlmsg_report(nlh));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001131 }
1132
1133 if (err < 0)
1134 return err;
1135
Daniel Borkmann308ac912015-08-08 21:40:01 +02001136 h = nf_conntrack_find_get(net, &zone, &tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -07001137 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001138 return -ENOENT;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001139
1140 ct = nf_ct_tuplehash_to_ctrack(h);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001141
Patrick McHardydf6fb862007-09-28 14:37:03 -07001142 if (cda[CTA_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08001143 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
Patrick McHardy7f85f912007-09-28 14:41:27 -07001144 if (id != (u32)(unsigned long)ct) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001145 nf_ct_put(ct);
1146 return -ENOENT;
1147 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001148 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001149
Florian Westphal02982c22013-07-29 15:41:54 +02001150 if (del_timer(&ct->timeout))
1151 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh));
1152
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001153 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001154
1155 return 0;
1156}
1157
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01001158static 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[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001162{
1163 struct nf_conntrack_tuple_hash *h;
1164 struct nf_conntrack_tuple tuple;
1165 struct nf_conn *ct;
1166 struct sk_buff *skb2 = NULL;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001167 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001168 u_int8_t u3 = nfmsg->nfgen_family;
Daniel Borkmann308ac912015-08-08 21:40:01 +02001169 struct nf_conntrack_zone zone;
Patrick McHardyef00f892010-02-15 18:14:57 +01001170 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001171
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001172 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1173 struct netlink_dump_control c = {
1174 .dump = ctnetlink_dump_table,
1175 .done = ctnetlink_done,
1176 };
Kristian Evensen866476f2014-12-24 09:57:10 +01001177
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +00001178 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
Kristian Evensen866476f2014-12-24 09:57:10 +01001179 struct ctnetlink_filter *filter;
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +00001180
Kristian Evensen866476f2014-12-24 09:57:10 +01001181 filter = ctnetlink_alloc_filter(cda);
1182 if (IS_ERR(filter))
1183 return PTR_ERR(filter);
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +00001184
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +00001185 c.data = filter;
1186 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001187 return netlink_dump_start(ctnl, skb, nlh, &c);
1188 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001189
Patrick McHardyef00f892010-02-15 18:14:57 +01001190 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1191 if (err < 0)
1192 return err;
1193
Patrick McHardydf6fb862007-09-28 14:37:03 -07001194 if (cda[CTA_TUPLE_ORIG])
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001195 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1196 u3, &zone);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001197 else if (cda[CTA_TUPLE_REPLY])
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001198 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1199 u3, &zone);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001200 else
1201 return -EINVAL;
1202
1203 if (err < 0)
1204 return err;
1205
Daniel Borkmann308ac912015-08-08 21:40:01 +02001206 h = nf_conntrack_find_get(net, &zone, &tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -07001207 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001208 return -ENOENT;
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -07001209
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001210 ct = nf_ct_tuplehash_to_ctrack(h);
1211
1212 err = -ENOMEM;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001213 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1214 if (skb2 == NULL) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001215 nf_ct_put(ct);
1216 return -ENOMEM;
1217 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001218
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001219 rcu_read_lock();
Eric W. Biederman15e47302012-09-07 20:12:54 +00001220 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +01001221 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001222 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001223 nf_ct_put(ct);
1224 if (err <= 0)
1225 goto free;
1226
Eric W. Biederman15e47302012-09-07 20:12:54 +00001227 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001228 if (err < 0)
1229 goto out;
1230
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001231 return 0;
1232
1233free:
1234 kfree_skb(skb2);
1235out:
Pablo Neira Ayusof31e8d492011-01-13 14:19:55 +01001236 /* this avoids a loop in nfnetlink. */
1237 return err == -EAGAIN ? -ENOBUFS : err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001238}
1239
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001240static int ctnetlink_done_list(struct netlink_callback *cb)
1241{
1242 if (cb->args[1])
1243 nf_ct_put((struct nf_conn *)cb->args[1]);
1244 return 0;
1245}
1246
1247static int
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001248ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001249{
Florian Westphalcd5f3362014-06-08 11:41:23 +02001250 struct nf_conn *ct, *last;
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001251 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;
1255 int res;
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001256 int cpu;
1257 struct hlist_nulls_head *list;
1258 struct net *net = sock_net(skb->sk);
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001259
1260 if (cb->args[2])
1261 return 0;
1262
Florian Westphalcd5f3362014-06-08 11:41:23 +02001263 last = (struct nf_conn *)cb->args[1];
1264
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001265 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1266 struct ct_pcpu *pcpu;
1267
1268 if (!cpu_possible(cpu))
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001269 continue;
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001270
1271 pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
1272 spin_lock_bh(&pcpu->lock);
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001273 list = dying ? &pcpu->dying : &pcpu->unconfirmed;
1274restart:
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)
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001278 continue;
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001279 if (cb->args[1]) {
1280 if (ct != last)
1281 continue;
1282 cb->args[1] = 0;
1283 }
1284 rcu_read_lock();
1285 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1286 cb->nlh->nlmsg_seq,
1287 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1288 ct);
1289 rcu_read_unlock();
1290 if (res < 0) {
Florian Westphalcd5f3362014-06-08 11:41:23 +02001291 if (!atomic_inc_not_zero(&ct->ct_general.use))
1292 continue;
Pablo Neira Ayuso266155b2014-06-05 14:28:44 +02001293 cb->args[0] = cpu;
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001294 cb->args[1] = (unsigned long)ct;
1295 spin_unlock_bh(&pcpu->lock);
1296 goto out;
1297 }
1298 }
1299 if (cb->args[1]) {
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001300 cb->args[1] = 0;
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001301 goto restart;
Pablo Neira Ayuso266155b2014-06-05 14:28:44 +02001302 }
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001303 spin_unlock_bh(&pcpu->lock);
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001304 }
Pablo Neira Ayuso266155b2014-06-05 14:28:44 +02001305 cb->args[2] = 1;
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001306out:
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001307 if (last)
1308 nf_ct_put(last);
1309
1310 return skb->len;
1311}
1312
1313static int
1314ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1315{
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001316 return ctnetlink_dump_list(skb, cb, true);
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001317}
1318
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01001319static 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[])
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001323{
1324 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1325 struct netlink_dump_control c = {
1326 .dump = ctnetlink_dump_dying,
1327 .done = ctnetlink_done_list,
1328 };
1329 return netlink_dump_start(ctnl, skb, nlh, &c);
1330 }
1331
1332 return -EOPNOTSUPP;
1333}
1334
1335static int
1336ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1337{
Jesper Dangaard Brouerb7779d02014-03-03 14:45:20 +01001338 return ctnetlink_dump_list(skb, cb, false);
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001339}
1340
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01001341static 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[])
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01001345{
1346 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1347 struct netlink_dump_control c = {
1348 .dump = ctnetlink_dump_unconfirmed,
1349 .done = ctnetlink_done_list,
1350 };
1351 return netlink_dump_start(ctnl, skb, nlh, &c);
1352 }
1353
1354 return -EOPNOTSUPP;
1355}
1356
Pablo Neira Ayuso67671842008-10-20 03:34:27 -07001357#ifdef CONFIG_NF_NAT_NEEDED
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -08001358static int
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001359ctnetlink_parse_nat_setup(struct nf_conn *ct,
1360 enum nf_nat_manip_type manip,
Patrick McHardy39938322009-08-25 16:07:58 +02001361 const struct nlattr *attr)
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001362{
1363 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
Patrick McHardyc7232c92012-08-26 19:14:06 +02001364 int err;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001365
1366 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1367 if (!parse_nat_setup) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07001368#ifdef CONFIG_MODULES
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001369 rcu_read_unlock();
Pablo Neira Ayusoc14b78e2013-02-05 01:50:26 +01001370 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
Patrick McHardyc7232c92012-08-26 19:14:06 +02001371 if (request_module("nf-nat") < 0) {
Pablo Neira Ayusoc14b78e2013-02-05 01:50:26 +01001372 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001373 rcu_read_lock();
1374 return -EOPNOTSUPP;
1375 }
Pablo Neira Ayusoc14b78e2013-02-05 01:50:26 +01001376 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001377 rcu_read_lock();
1378 if (nfnetlink_parse_nat_setup_hook)
1379 return -EAGAIN;
1380#endif
1381 return -EOPNOTSUPP;
1382 }
1383
Patrick McHardyc7232c92012-08-26 19:14:06 +02001384 err = parse_nat_setup(ct, manip, attr);
1385 if (err == -EAGAIN) {
1386#ifdef CONFIG_MODULES
1387 rcu_read_unlock();
Pablo Neira Ayusoc14b78e2013-02-05 01:50:26 +01001388 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
Patrick McHardyc7232c92012-08-26 19:14:06 +02001389 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
Pablo Neira Ayusoc14b78e2013-02-05 01:50:26 +01001390 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
Patrick McHardyc7232c92012-08-26 19:14:06 +02001391 rcu_read_lock();
1392 return -EOPNOTSUPP;
1393 }
Pablo Neira Ayusoc14b78e2013-02-05 01:50:26 +01001394 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
Patrick McHardyc7232c92012-08-26 19:14:06 +02001395 rcu_read_lock();
1396#else
1397 err = -EOPNOTSUPP;
1398#endif
1399 }
1400 return err;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001401}
Pablo Neira Ayuso67671842008-10-20 03:34:27 -07001402#endif
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001403
1404static int
Patrick McHardy39938322009-08-25 16:07:58 +02001405ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001406{
1407 unsigned long d;
Patrick McHardy77236b62007-12-17 22:29:45 -08001408 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001409 d = ct->status ^ status;
1410
1411 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1412 /* unchangeable */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001413 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001414
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001415 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1416 /* SEEN_REPLY bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001417 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001418
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001419 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1420 /* ASSURED bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001421 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001422
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001423 /* Be careful here, modifying NAT bits can screw up things,
1424 * so don't let users modify them directly if they don't pass
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -08001425 * nf_nat_range. */
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001426 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1427 return 0;
1428}
1429
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001430static int
Pablo Neira Ayuso0eba8012014-02-16 12:15:43 +01001431ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001432{
1433#ifdef CONFIG_NF_NAT_NEEDED
1434 int ret;
1435
Florian Westphalfe337ac2014-04-28 21:07:31 +02001436 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1437 return 0;
1438
Pablo Neira Ayuso0eba8012014-02-16 12:15:43 +01001439 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1440 cda[CTA_NAT_DST]);
1441 if (ret < 0)
1442 return ret;
1443
1444 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1445 cda[CTA_NAT_SRC]);
1446 return ret;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001447#else
Pablo Neira Ayuso0eba8012014-02-16 12:15:43 +01001448 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1449 return 0;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001450 return -EOPNOTSUPP;
1451#endif
1452}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001453
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +02001454static int ctnetlink_change_helper(struct nf_conn *ct,
1455 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001456{
1457 struct nf_conntrack_helper *helper;
Harald Weltedc808fe2006-03-20 17:56:32 -08001458 struct nf_conn_help *help = nfct_help(ct);
Pablo Neira Ayuso29fe1b42009-04-22 02:26:37 -07001459 char *helpname = NULL;
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001460 struct nlattr *helpinfo = NULL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001461 int err;
1462
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001463 /* don't change helper of sibling connections */
1464 if (ct->master)
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001465 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001466
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001467 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001468 if (err < 0)
1469 return err;
1470
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001471 if (!strcmp(helpname, "")) {
1472 if (help && help->helper) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001473 /* we had a helper before ... */
1474 nf_ct_remove_expectations(ct);
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001475 RCU_INIT_POINTER(help->helper, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001476 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001477
1478 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001479 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001480
Patrick McHardy794e6872010-02-03 13:41:29 +01001481 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1482 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001483 if (helper == NULL) {
1484#ifdef CONFIG_MODULES
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01001485 spin_unlock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001486
1487 if (request_module("nfct-helper-%s", helpname) < 0) {
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01001488 spin_lock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001489 return -EOPNOTSUPP;
1490 }
1491
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01001492 spin_lock_bh(&nf_conntrack_expect_lock);
Patrick McHardy794e6872010-02-03 13:41:29 +01001493 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1494 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001495 if (helper)
1496 return -EAGAIN;
1497#endif
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001498 return -EOPNOTSUPP;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001499 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001500
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001501 if (help) {
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001502 if (help->helper == helper) {
1503 /* update private helper data if allowed. */
Pablo Neira Ayuso7be54ca2012-09-21 16:52:08 +02001504 if (helper->from_nlattr)
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001505 helper->from_nlattr(helpinfo, ct);
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001506 return 0;
Pablo Neira Ayusofd7462d2012-06-18 17:29:53 +02001507 } else
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001508 return -EBUSY;
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001509 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001510
Pablo Neira Ayusofd7462d2012-06-18 17:29:53 +02001511 /* we cannot set a helper for an existing conntrack */
1512 return -EOPNOTSUPP;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001513}
1514
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +02001515static int ctnetlink_change_timeout(struct nf_conn *ct,
1516 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001517{
Patrick McHardy77236b62007-12-17 22:29:45 -08001518 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001519
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001520 if (!del_timer(&ct->timeout))
1521 return -ETIME;
1522
1523 ct->timeout.expires = jiffies + timeout * HZ;
1524 add_timer(&ct->timeout);
1525
1526 return 0;
1527}
1528
Patrick McHardyd0b02682010-02-10 15:38:33 +01001529static 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 },
1533};
1534
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +02001535static int ctnetlink_change_protoinfo(struct nf_conn *ct,
1536 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001537{
Patrick McHardy39938322009-08-25 16:07:58 +02001538 const struct nlattr *attr = cda[CTA_PROTOINFO];
1539 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
Martin Josefsson605dcad2006-11-29 02:35:06 +01001540 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001541 int err = 0;
1542
Daniel Borkmann130ffbc2013-06-12 17:54:51 +02001543 err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
1544 if (err < 0)
1545 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001546
Florian Westphalcd915662009-03-18 17:28:37 +01001547 rcu_read_lock();
1548 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
Patrick McHardyfdf70832007-09-28 14:37:41 -07001549 if (l4proto->from_nlattr)
1550 err = l4proto->from_nlattr(tb, ct);
Florian Westphalcd915662009-03-18 17:28:37 +01001551 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001552
1553 return err;
1554}
1555
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001556static 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 },
Patrick McHardyd0b02682010-02-10 15:38:33 +01001560};
1561
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +02001562static int change_seq_adj(struct nf_ct_seqadj *seq,
1563 const struct nlattr * const attr)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001564{
Daniel Borkmann130ffbc2013-06-12 17:54:51 +02001565 int err;
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001566 struct nlattr *cda[CTA_SEQADJ_MAX+1];
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001567
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001568 err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy);
Daniel Borkmann130ffbc2013-06-12 17:54:51 +02001569 if (err < 0)
1570 return err;
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001571
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001572 if (!cda[CTA_SEQADJ_CORRECTION_POS])
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001573 return -EINVAL;
1574
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001575 seq->correction_pos =
1576 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001577
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001578 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001579 return -EINVAL;
1580
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001581 seq->offset_before =
1582 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001583
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001584 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001585 return -EINVAL;
1586
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001587 seq->offset_after =
1588 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001589
1590 return 0;
1591}
1592
1593static int
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001594ctnetlink_change_seq_adj(struct nf_conn *ct,
1595 const struct nlattr * const cda[])
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001596{
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001597 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001598 int ret = 0;
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001599
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001600 if (!seqadj)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001601 return 0;
1602
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001603 if (cda[CTA_SEQ_ADJ_ORIG]) {
1604 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
1605 cda[CTA_SEQ_ADJ_ORIG]);
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001606 if (ret < 0)
1607 return ret;
1608
1609 ct->status |= IPS_SEQ_ADJUST;
1610 }
1611
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001612 if (cda[CTA_SEQ_ADJ_REPLY]) {
1613 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
1614 cda[CTA_SEQ_ADJ_REPLY]);
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001615 if (ret < 0)
1616 return ret;
1617
1618 ct->status |= IPS_SEQ_ADJUST;
1619 }
1620
1621 return 0;
1622}
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001623
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001624static int
Florian Westphal9b21f6a2013-01-11 06:30:46 +00001625ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1626{
1627#ifdef CONFIG_NF_CONNTRACK_LABELS
1628 size_t len = nla_len(cda[CTA_LABELS]);
1629 const void *mask = cda[CTA_LABELS_MASK];
1630
1631 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1632 return -EINVAL;
1633
1634 if (mask) {
1635 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1636 nla_len(cda[CTA_LABELS_MASK]) != len)
1637 return -EINVAL;
1638 mask = nla_data(cda[CTA_LABELS_MASK]);
1639 }
1640
1641 len /= sizeof(u32);
1642
1643 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1644#else
1645 return -EOPNOTSUPP;
1646#endif
1647}
1648
1649static int
Patrick McHardy39938322009-08-25 16:07:58 +02001650ctnetlink_change_conntrack(struct nf_conn *ct,
1651 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001652{
1653 int err;
1654
Pablo Neira Ayusoe0983602009-03-16 15:27:22 +01001655 /* only allow NAT changes and master assignation for new conntracks */
1656 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1657 return -EOPNOTSUPP;
1658
Patrick McHardydf6fb862007-09-28 14:37:03 -07001659 if (cda[CTA_HELP]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001660 err = ctnetlink_change_helper(ct, cda);
1661 if (err < 0)
1662 return err;
1663 }
1664
Patrick McHardydf6fb862007-09-28 14:37:03 -07001665 if (cda[CTA_TIMEOUT]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001666 err = ctnetlink_change_timeout(ct, cda);
1667 if (err < 0)
1668 return err;
1669 }
1670
Patrick McHardydf6fb862007-09-28 14:37:03 -07001671 if (cda[CTA_STATUS]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001672 err = ctnetlink_change_status(ct, cda);
1673 if (err < 0)
1674 return err;
1675 }
1676
Patrick McHardydf6fb862007-09-28 14:37:03 -07001677 if (cda[CTA_PROTOINFO]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001678 err = ctnetlink_change_protoinfo(ct, cda);
1679 if (err < 0)
1680 return err;
1681 }
1682
Martin Josefssonbcd1e832006-04-01 02:23:21 -08001683#if defined(CONFIG_NF_CONNTRACK_MARK)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001684 if (cda[CTA_MARK])
Patrick McHardy77236b62007-12-17 22:29:45 -08001685 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001686#endif
1687
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001688 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1689 err = ctnetlink_change_seq_adj(ct, cda);
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001690 if (err < 0)
1691 return err;
1692 }
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001693
Florian Westphal9b21f6a2013-01-11 06:30:46 +00001694 if (cda[CTA_LABELS]) {
1695 err = ctnetlink_attach_labels(ct, cda);
1696 if (err < 0)
1697 return err;
1698 }
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001699
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001700 return 0;
1701}
1702
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001703static struct nf_conn *
Daniel Borkmann308ac912015-08-08 21:40:01 +02001704ctnetlink_create_conntrack(struct net *net,
1705 const struct nf_conntrack_zone *zone,
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001706 const struct nlattr * const cda[],
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001707 struct nf_conntrack_tuple *otuple,
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001708 struct nf_conntrack_tuple *rtuple,
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001709 u8 u3)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001710{
1711 struct nf_conn *ct;
1712 int err = -EINVAL;
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001713 struct nf_conntrack_helper *helper;
Pablo Neira Ayuso315c34d2011-04-21 10:55:07 +02001714 struct nf_conn_tstamp *tstamp;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001715
Patrick McHardyef00f892010-02-15 18:14:57 +01001716 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
Julia Lawallcd7fcbf2009-01-12 00:06:08 +00001717 if (IS_ERR(ct))
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001718 return ERR_PTR(-ENOMEM);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001719
Patrick McHardydf6fb862007-09-28 14:37:03 -07001720 if (!cda[CTA_TIMEOUT])
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001721 goto err1;
Patrick McHardy77236b62007-12-17 22:29:45 -08001722 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001723
1724 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001725
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001726 rcu_read_lock();
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001727 if (cda[CTA_HELP]) {
Pablo Neira Ayuso29fe1b42009-04-22 02:26:37 -07001728 char *helpname = NULL;
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001729 struct nlattr *helpinfo = NULL;
1730
1731 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001732 if (err < 0)
1733 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001734
Patrick McHardy794e6872010-02-03 13:41:29 +01001735 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1736 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001737 if (helper == NULL) {
1738 rcu_read_unlock();
1739#ifdef CONFIG_MODULES
1740 if (request_module("nfct-helper-%s", helpname) < 0) {
1741 err = -EOPNOTSUPP;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001742 goto err1;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001743 }
1744
1745 rcu_read_lock();
Patrick McHardy794e6872010-02-03 13:41:29 +01001746 helper = __nf_conntrack_helper_find(helpname,
1747 nf_ct_l3num(ct),
1748 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001749 if (helper) {
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001750 err = -EAGAIN;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001751 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001752 }
1753 rcu_read_unlock();
1754#endif
1755 err = -EOPNOTSUPP;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001756 goto err1;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001757 } else {
1758 struct nf_conn_help *help;
1759
Pablo Neira Ayuso1afc5672012-06-07 12:11:50 +02001760 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001761 if (help == NULL) {
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001762 err = -ENOMEM;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001763 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001764 }
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001765 /* set private helper data if allowed. */
Pablo Neira Ayuso7be54ca2012-09-21 16:52:08 +02001766 if (helper->from_nlattr)
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001767 helper->from_nlattr(helpinfo, ct);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001768
1769 /* not in hash table yet so not strictly necessary */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001770 RCU_INIT_POINTER(help->helper, helper);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001771 }
1772 } else {
1773 /* try an implicit helper assignation */
Patrick McHardyb2a15a62010-02-03 14:13:03 +01001774 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001775 if (err < 0)
1776 goto err2;
Patrick McHarrdy3c158f72007-06-05 12:55:27 -07001777 }
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001778
Pablo Neira Ayuso0eba8012014-02-16 12:15:43 +01001779 err = ctnetlink_setup_nat(ct, cda);
1780 if (err < 0)
1781 goto err2;
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001782
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001783 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +01001784 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001785 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
Florian Westphalc539f012013-01-11 06:30:44 +00001786 nf_ct_labels_ext_add(ct);
1787
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001788 /* we must add conntrack extensions before confirmation. */
1789 ct->status |= IPS_CONFIRMED;
1790
1791 if (cda[CTA_STATUS]) {
1792 err = ctnetlink_change_status(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001793 if (err < 0)
1794 goto err2;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001795 }
1796
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001797 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1798 err = ctnetlink_change_seq_adj(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001799 if (err < 0)
1800 goto err2;
Pablo Neira Ayusoc969aa72009-02-09 14:33:57 -08001801 }
Pablo Neira Ayusoc969aa72009-02-09 14:33:57 -08001802
Changli Gaoe5fc9e72010-11-12 17:33:17 +01001803 memset(&ct->proto, 0, sizeof(ct->proto));
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001804 if (cda[CTA_PROTOINFO]) {
1805 err = ctnetlink_change_protoinfo(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001806 if (err < 0)
1807 goto err2;
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001808 }
1809
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001810#if defined(CONFIG_NF_CONNTRACK_MARK)
1811 if (cda[CTA_MARK])
1812 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1813#endif
1814
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001815 /* setup master conntrack: this is a confirmed expectation */
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001816 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;
1820
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001821 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
1822 u3, NULL);
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001823 if (err < 0)
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001824 goto err2;
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001825
Patrick McHardyef00f892010-02-15 18:14:57 +01001826 master_h = nf_conntrack_find_get(net, zone, &master);
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001827 if (master_h == NULL) {
1828 err = -ENOENT;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001829 goto err2;
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001830 }
1831 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001832 __set_bit(IPS_EXPECTED_BIT, &ct->status);
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001833 ct->master = master_ct;
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001834 }
Pablo Neira Ayuso315c34d2011-04-21 10:55:07 +02001835 tstamp = nf_conn_tstamp_find(ct);
1836 if (tstamp)
Eric Dumazetd2de8752014-08-22 18:32:09 -07001837 tstamp->start = ktime_get_real_ns();
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001838
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001839 err = nf_conntrack_hash_check_insert(ct);
1840 if (err < 0)
1841 goto err2;
1842
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001843 rcu_read_unlock();
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001844
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001845 return ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001846
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001847err2:
1848 rcu_read_unlock();
1849err1:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001850 nf_conntrack_free(ct);
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001851 return ERR_PTR(err);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001852}
1853
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01001854static 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[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001858{
1859 struct nf_conntrack_tuple otuple, rtuple;
1860 struct nf_conntrack_tuple_hash *h = NULL;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001861 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001862 struct nf_conn *ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001863 u_int8_t u3 = nfmsg->nfgen_family;
Daniel Borkmann308ac912015-08-08 21:40:01 +02001864 struct nf_conntrack_zone zone;
Patrick McHardyef00f892010-02-15 18:14:57 +01001865 int err;
1866
1867 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1868 if (err < 0)
1869 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001870
Patrick McHardydf6fb862007-09-28 14:37:03 -07001871 if (cda[CTA_TUPLE_ORIG]) {
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001872 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
1873 u3, &zone);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001874 if (err < 0)
1875 return err;
1876 }
1877
Patrick McHardydf6fb862007-09-28 14:37:03 -07001878 if (cda[CTA_TUPLE_REPLY]) {
Daniel Borkmanndeedb592015-08-14 16:03:39 +02001879 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
1880 u3, &zone);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001881 if (err < 0)
1882 return err;
1883 }
1884
Patrick McHardydf6fb862007-09-28 14:37:03 -07001885 if (cda[CTA_TUPLE_ORIG])
Daniel Borkmann308ac912015-08-08 21:40:01 +02001886 h = nf_conntrack_find_get(net, &zone, &otuple);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001887 else if (cda[CTA_TUPLE_REPLY])
Daniel Borkmann308ac912015-08-08 21:40:01 +02001888 h = nf_conntrack_find_get(net, &zone, &rtuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001889
1890 if (h == NULL) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001891 err = -ENOENT;
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001892 if (nlh->nlmsg_flags & NLM_F_CREATE) {
Pablo Neira Ayusofecc1132009-05-05 17:48:26 +02001893 enum ip_conntrack_events events;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001894
Florian Westphal442fad92013-02-11 23:22:38 +00001895 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
1896 return -EINVAL;
1897
Daniel Borkmann308ac912015-08-08 21:40:01 +02001898 ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple,
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001899 &rtuple, u3);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001900 if (IS_ERR(ct))
1901 return PTR_ERR(ct);
1902
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001903 err = 0;
Pablo Neira Ayusofecc1132009-05-05 17:48:26 +02001904 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1905 events = IPCT_RELATED;
1906 else
1907 events = IPCT_NEW;
1908
Florian Westphal9b21f6a2013-01-11 06:30:46 +00001909 if (cda[CTA_LABELS] &&
1910 ctnetlink_attach_labels(ct, cda) == 0)
1911 events |= (1 << IPCT_LABEL);
1912
Patrick McHardy858b31332010-02-03 13:48:53 +01001913 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1914 (1 << IPCT_ASSURED) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001915 (1 << IPCT_HELPER) |
1916 (1 << IPCT_PROTOINFO) |
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001917 (1 << IPCT_SEQADJ) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001918 (1 << IPCT_MARK) | events,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001919 ct, NETLINK_CB(skb).portid,
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001920 nlmsg_report(nlh));
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001921 nf_ct_put(ct);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001922 }
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001923
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001924 return err;
1925 }
1926 /* implicit 'else' */
1927
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001928 err = -EEXIST;
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001929 ct = nf_ct_tuplehash_to_ctrack(h);
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001930 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01001931 spin_lock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01001932 err = ctnetlink_change_conntrack(ct, cda);
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01001933 spin_unlock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01001934 if (err == 0) {
Patrick McHardy858b31332010-02-03 13:48:53 +01001935 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1936 (1 << IPCT_ASSURED) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001937 (1 << IPCT_HELPER) |
Florian Westphal797a7d62013-06-21 16:51:30 +02001938 (1 << IPCT_LABEL) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001939 (1 << IPCT_PROTOINFO) |
Patrick McHardy41d73ec2013-08-27 08:50:12 +02001940 (1 << IPCT_SEQADJ) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001941 (1 << IPCT_MARK),
Eric W. Biederman15e47302012-09-07 20:12:54 +00001942 ct, NETLINK_CB(skb).portid,
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001943 nlmsg_report(nlh));
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001944 }
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001945 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001946
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001947 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001948 return err;
1949}
1950
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02001951static int
Eric W. Biederman15e47302012-09-07 20:12:54 +00001952ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02001953 __u16 cpu, const struct ip_conntrack_stat *st)
1954{
1955 struct nlmsghdr *nlh;
1956 struct nfgenmsg *nfmsg;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001957 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02001958
1959 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU);
Eric W. Biederman15e47302012-09-07 20:12:54 +00001960 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02001961 if (nlh == NULL)
1962 goto nlmsg_failure;
1963
1964 nfmsg = nlmsg_data(nlh);
1965 nfmsg->nfgen_family = AF_UNSPEC;
1966 nfmsg->version = NFNETLINK_V0;
1967 nfmsg->res_id = htons(cpu);
1968
1969 if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) ||
1970 nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
1971 nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) ||
1972 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
1973 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
1974 nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) ||
1975 nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) ||
1976 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
1977 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
1978 htonl(st->insert_failed)) ||
1979 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
1980 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
1981 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
1982 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
1983 htonl(st->search_restart)))
1984 goto nla_put_failure;
1985
1986 nlmsg_end(skb, nlh);
1987 return skb->len;
1988
1989nla_put_failure:
1990nlmsg_failure:
1991 nlmsg_cancel(skb, nlh);
1992 return -1;
1993}
1994
1995static int
1996ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
1997{
1998 int cpu;
1999 struct net *net = sock_net(skb->sk);
2000
2001 if (cb->args[0] == nr_cpu_ids)
2002 return 0;
2003
2004 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2005 const struct ip_conntrack_stat *st;
2006
2007 if (!cpu_possible(cpu))
2008 continue;
2009
2010 st = per_cpu_ptr(net->ct.stat, cpu);
2011 if (ctnetlink_ct_stat_cpu_fill_info(skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002012 NETLINK_CB(cb->skb).portid,
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002013 cb->nlh->nlmsg_seq,
2014 cpu, st) < 0)
2015 break;
2016 }
2017 cb->args[0] = cpu;
2018
2019 return skb->len;
2020}
2021
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01002022static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl,
2023 struct sk_buff *skb,
2024 const struct nlmsghdr *nlh,
2025 const struct nlattr * const cda[])
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002026{
2027 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2028 struct netlink_dump_control c = {
2029 .dump = ctnetlink_ct_stat_cpu_dump,
2030 };
2031 return netlink_dump_start(ctnl, skb, nlh, &c);
2032 }
2033
2034 return 0;
2035}
2036
2037static int
Eric W. Biederman15e47302012-09-07 20:12:54 +00002038ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002039 struct net *net)
2040{
2041 struct nlmsghdr *nlh;
2042 struct nfgenmsg *nfmsg;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002043 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002044 unsigned int nr_conntracks = atomic_read(&net->ct.count);
2045
2046 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS);
Eric W. Biederman15e47302012-09-07 20:12:54 +00002047 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002048 if (nlh == NULL)
2049 goto nlmsg_failure;
2050
2051 nfmsg = nlmsg_data(nlh);
2052 nfmsg->nfgen_family = AF_UNSPEC;
2053 nfmsg->version = NFNETLINK_V0;
2054 nfmsg->res_id = 0;
2055
2056 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
2057 goto nla_put_failure;
2058
2059 nlmsg_end(skb, nlh);
2060 return skb->len;
2061
2062nla_put_failure:
2063nlmsg_failure:
2064 nlmsg_cancel(skb, nlh);
2065 return -1;
2066}
2067
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01002068static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl,
2069 struct sk_buff *skb, const struct nlmsghdr *nlh,
2070 const struct nlattr * const cda[])
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002071{
2072 struct sk_buff *skb2;
2073 int err;
2074
2075 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2076 if (skb2 == NULL)
2077 return -ENOMEM;
2078
Eric W. Biederman15e47302012-09-07 20:12:54 +00002079 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002080 nlh->nlmsg_seq,
2081 NFNL_MSG_TYPE(nlh->nlmsg_type),
2082 sock_net(skb->sk));
2083 if (err <= 0)
2084 goto free;
2085
Eric W. Biederman15e47302012-09-07 20:12:54 +00002086 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002087 if (err < 0)
2088 goto out;
2089
2090 return 0;
2091
2092free:
2093 kfree_skb(skb2);
2094out:
2095 /* this avoids a loop in nfnetlink. */
2096 return err == -EAGAIN ? -ENOBUFS : err;
2097}
2098
Pablo Neira Ayusobd077932013-08-07 18:13:20 +02002099static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2100 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2101 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2102 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2103 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2104 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2105 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2106 .len = NF_CT_HELPER_NAME_LEN - 1 },
2107 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2108 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2109 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2110 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2111 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2112};
2113
2114static struct nf_conntrack_expect *
2115ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2116 struct nf_conntrack_helper *helper,
2117 struct nf_conntrack_tuple *tuple,
2118 struct nf_conntrack_tuple *mask);
2119
Ken-ichirou MATSUZAWA83f3e942015-10-05 11:48:47 +09002120#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002121static size_t
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002122ctnetlink_glue_build_size(const struct nf_conn *ct)
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002123{
2124 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2125 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2126 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2127 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2128 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2129 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2130 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2131 + nla_total_size(0) /* CTA_PROTOINFO */
2132 + nla_total_size(0) /* CTA_HELP */
2133 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2134 + ctnetlink_secctx_size(ct)
2135#ifdef CONFIG_NF_NAT_NEEDED
2136 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2137 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2138#endif
2139#ifdef CONFIG_NF_CONNTRACK_MARK
2140 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
2141#endif
Ken-ichirou MATSUZAWA4a001062014-06-16 13:52:34 +02002142#ifdef CONFIG_NF_CONNTRACK_ZONES
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002143 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
Ken-ichirou MATSUZAWA4a001062014-06-16 13:52:34 +02002144#endif
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002145 + ctnetlink_proto_size(ct)
2146 ;
2147}
2148
Ken-ichirou MATSUZAWA224a0592015-10-05 11:49:56 +09002149static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002150 enum ip_conntrack_info *ctinfo)
Pablo Neira Ayusob7bd1802015-09-30 22:53:44 +01002151{
2152 struct nf_conn *ct;
2153
2154 ct = nf_ct_get(skb, ctinfo);
2155 if (ct && nf_ct_is_untracked(ct))
2156 ct = NULL;
2157
2158 return ct;
2159}
2160
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002161static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002162{
Daniel Borkmann308ac912015-08-08 21:40:01 +02002163 const struct nf_conntrack_zone *zone;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002164 struct nlattr *nest_parms;
2165
2166 rcu_read_lock();
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002167 zone = nf_ct_zone(ct);
2168
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002169 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2170 if (!nest_parms)
2171 goto nla_put_failure;
2172 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2173 goto nla_put_failure;
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002174 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2175 NF_CT_ZONE_DIR_ORIG) < 0)
2176 goto nla_put_failure;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002177 nla_nest_end(skb, nest_parms);
2178
2179 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2180 if (!nest_parms)
2181 goto nla_put_failure;
2182 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2183 goto nla_put_failure;
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002184 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2185 NF_CT_ZONE_DIR_REPL) < 0)
2186 goto nla_put_failure;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002187 nla_nest_end(skb, nest_parms);
2188
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002189 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
2190 NF_CT_DEFAULT_ZONE_DIR) < 0)
Daniel Borkmann308ac912015-08-08 21:40:01 +02002191 goto nla_put_failure;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002192
2193 if (ctnetlink_dump_id(skb, ct) < 0)
2194 goto nla_put_failure;
2195
2196 if (ctnetlink_dump_status(skb, ct) < 0)
2197 goto nla_put_failure;
2198
2199 if (ctnetlink_dump_timeout(skb, ct) < 0)
2200 goto nla_put_failure;
2201
2202 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2203 goto nla_put_failure;
2204
2205 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2206 goto nla_put_failure;
2207
2208#ifdef CONFIG_NF_CONNTRACK_SECMARK
2209 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2210 goto nla_put_failure;
2211#endif
2212 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2213 goto nla_put_failure;
2214
2215 if ((ct->status & IPS_SEQ_ADJUST) &&
Patrick McHardy41d73ec2013-08-27 08:50:12 +02002216 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002217 goto nla_put_failure;
2218
2219#ifdef CONFIG_NF_CONNTRACK_MARK
2220 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2221 goto nla_put_failure;
2222#endif
Florian Westphal0ceabd82013-01-11 06:30:45 +00002223 if (ctnetlink_dump_labels(skb, ct) < 0)
2224 goto nla_put_failure;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002225 rcu_read_unlock();
2226 return 0;
2227
2228nla_put_failure:
2229 rcu_read_unlock();
2230 return -ENOSPC;
2231}
2232
2233static int
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002234ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
2235 enum ip_conntrack_info ctinfo,
2236 u_int16_t ct_attr, u_int16_t ct_info_attr)
Pablo Neira Ayusob7bd1802015-09-30 22:53:44 +01002237{
2238 struct nlattr *nest_parms;
2239
2240 nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED);
2241 if (!nest_parms)
2242 goto nla_put_failure;
2243
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002244 if (__ctnetlink_glue_build(skb, ct) < 0)
Pablo Neira Ayusob7bd1802015-09-30 22:53:44 +01002245 goto nla_put_failure;
2246
2247 nla_nest_end(skb, nest_parms);
2248
2249 if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
2250 goto nla_put_failure;
2251
2252 return 0;
2253
2254nla_put_failure:
2255 return -ENOSPC;
2256}
2257
2258static int
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002259ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002260{
2261 int err;
2262
2263 if (cda[CTA_TIMEOUT]) {
2264 err = ctnetlink_change_timeout(ct, cda);
2265 if (err < 0)
2266 return err;
2267 }
2268 if (cda[CTA_STATUS]) {
2269 err = ctnetlink_change_status(ct, cda);
2270 if (err < 0)
2271 return err;
2272 }
2273 if (cda[CTA_HELP]) {
2274 err = ctnetlink_change_helper(ct, cda);
2275 if (err < 0)
2276 return err;
2277 }
Florian Westphal9b21f6a2013-01-11 06:30:46 +00002278 if (cda[CTA_LABELS]) {
2279 err = ctnetlink_attach_labels(ct, cda);
2280 if (err < 0)
2281 return err;
2282 }
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002283#if defined(CONFIG_NF_CONNTRACK_MARK)
Florian Westphal534473c2013-12-19 18:25:15 +01002284 if (cda[CTA_MARK]) {
2285 u32 mask = 0, mark, newmark;
2286 if (cda[CTA_MARK_MASK])
2287 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2288
2289 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2290 newmark = (ct->mark & mask) ^ mark;
2291 if (newmark != ct->mark)
2292 ct->mark = newmark;
2293 }
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002294#endif
2295 return 0;
2296}
2297
2298static int
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002299ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002300{
2301 struct nlattr *cda[CTA_MAX+1];
Pablo Neira Ayuso68e035c2012-08-14 12:47:37 +02002302 int ret;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002303
Daniel Borkmann130ffbc2013-06-12 17:54:51 +02002304 ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
2305 if (ret < 0)
2306 return ret;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002307
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002308 spin_lock_bh(&nf_conntrack_expect_lock);
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002309 ret = ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002310 spin_unlock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayuso68e035c2012-08-14 12:47:37 +02002311
2312 return ret;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002313}
2314
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002315static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
2316 const struct nf_conn *ct,
2317 struct nf_conntrack_tuple *tuple,
2318 struct nf_conntrack_tuple *mask)
Pablo Neira Ayusobd077932013-08-07 18:13:20 +02002319{
2320 int err;
2321
2322 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002323 nf_ct_l3num(ct), NULL);
Pablo Neira Ayusobd077932013-08-07 18:13:20 +02002324 if (err < 0)
2325 return err;
2326
2327 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002328 nf_ct_l3num(ct), NULL);
Pablo Neira Ayusobd077932013-08-07 18:13:20 +02002329}
2330
2331static int
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002332ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2333 u32 portid, u32 report)
Pablo Neira Ayusobd077932013-08-07 18:13:20 +02002334{
2335 struct nlattr *cda[CTA_EXPECT_MAX+1];
2336 struct nf_conntrack_tuple tuple, mask;
Florian Westphalb7e092c2013-08-27 11:47:26 +02002337 struct nf_conntrack_helper *helper = NULL;
Pablo Neira Ayusobd077932013-08-07 18:13:20 +02002338 struct nf_conntrack_expect *exp;
2339 int err;
2340
2341 err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy);
2342 if (err < 0)
2343 return err;
2344
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002345 err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
2346 ct, &tuple, &mask);
Pablo Neira Ayusobd077932013-08-07 18:13:20 +02002347 if (err < 0)
2348 return err;
2349
2350 if (cda[CTA_EXPECT_HELP_NAME]) {
2351 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2352
2353 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2354 nf_ct_protonum(ct));
2355 if (helper == NULL)
2356 return -EOPNOTSUPP;
2357 }
2358
2359 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2360 helper, &tuple, &mask);
2361 if (IS_ERR(exp))
2362 return PTR_ERR(exp);
2363
2364 err = nf_ct_expect_related_report(exp, portid, report);
2365 if (err < 0) {
2366 nf_ct_expect_put(exp);
2367 return err;
2368 }
2369
2370 return 0;
2371}
2372
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002373static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
2374 enum ip_conntrack_info ctinfo, int diff)
Pablo Neira Ayusob7bd1802015-09-30 22:53:44 +01002375{
2376 if (!(ct->status & IPS_NAT_MASK))
2377 return;
2378
2379 nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
2380}
2381
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09002382static struct nfnl_ct_hook ctnetlink_glue_hook = {
2383 .get_ct = ctnetlink_glue_get_ct,
2384 .build_size = ctnetlink_glue_build_size,
2385 .build = ctnetlink_glue_build,
2386 .parse = ctnetlink_glue_parse,
2387 .attach_expect = ctnetlink_glue_attach_expect,
2388 .seq_adjust = ctnetlink_glue_seqadj,
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002389};
Ken-ichirou MATSUZAWA83f3e942015-10-05 11:48:47 +09002390#endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002391
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002392/***********************************************************************
2393 * EXPECT
2394 ***********************************************************************/
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002395
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +02002396static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2397 const struct nf_conntrack_tuple *tuple,
2398 enum ctattr_expect type)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002399{
Patrick McHardydf6fb862007-09-28 14:37:03 -07002400 struct nlattr *nest_parms;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002401
Patrick McHardydf6fb862007-09-28 14:37:03 -07002402 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2403 if (!nest_parms)
2404 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002405 if (ctnetlink_dump_tuples(skb, tuple) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002406 goto nla_put_failure;
2407 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002408
2409 return 0;
2410
Patrick McHardydf6fb862007-09-28 14:37:03 -07002411nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002412 return -1;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002413}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002414
Pablo Neira Ayuso4054ff42016-04-12 23:32:34 +02002415static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
2416 const struct nf_conntrack_tuple *tuple,
2417 const struct nf_conntrack_tuple_mask *mask)
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002418{
2419 int ret;
2420 struct nf_conntrack_l3proto *l3proto;
Martin Josefsson605dcad2006-11-29 02:35:06 +01002421 struct nf_conntrack_l4proto *l4proto;
Patrick McHardyd4156e82007-07-07 22:31:32 -07002422 struct nf_conntrack_tuple m;
Patrick McHardydf6fb862007-09-28 14:37:03 -07002423 struct nlattr *nest_parms;
Patrick McHardyd4156e82007-07-07 22:31:32 -07002424
2425 memset(&m, 0xFF, sizeof(m));
Patrick McHardyd4156e82007-07-07 22:31:32 -07002426 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
Patrick McHardye5787562010-01-26 17:04:02 +01002427 m.src.u.all = mask->src.u.all;
2428 m.dst.protonum = tuple->dst.protonum;
Patrick McHardyd4156e82007-07-07 22:31:32 -07002429
Patrick McHardydf6fb862007-09-28 14:37:03 -07002430 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2431 if (!nest_parms)
2432 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002433
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00002434 rcu_read_lock();
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002435 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
Patrick McHardyd4156e82007-07-07 22:31:32 -07002436 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00002437 if (ret >= 0) {
2438 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2439 tuple->dst.protonum);
Patrick McHardyd4156e82007-07-07 22:31:32 -07002440 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00002441 }
2442 rcu_read_unlock();
2443
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002444 if (unlikely(ret < 0))
Patrick McHardydf6fb862007-09-28 14:37:03 -07002445 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002446
Patrick McHardydf6fb862007-09-28 14:37:03 -07002447 nla_nest_end(skb, nest_parms);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002448
2449 return 0;
2450
Patrick McHardydf6fb862007-09-28 14:37:03 -07002451nla_put_failure:
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002452 return -1;
2453}
2454
Patrick McHardyc7232c92012-08-26 19:14:06 +02002455static const union nf_inet_addr any_addr;
2456
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -08002457static int
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002458ctnetlink_exp_dump_expect(struct sk_buff *skb,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002459 const struct nf_conntrack_expect *exp)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002460{
2461 struct nf_conn *master = exp->master;
Xi Wangc1216382011-12-30 10:40:17 -05002462 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002463 struct nf_conn_help *help;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002464#ifdef CONFIG_NF_NAT_NEEDED
2465 struct nlattr *nest_parms;
2466 struct nf_conntrack_tuple nat_tuple = {};
2467#endif
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002468 struct nf_ct_helper_expectfn *expfn;
2469
Patrick McHardyd978e5d2007-12-17 22:37:03 -08002470 if (timeout < 0)
2471 timeout = 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002472
2473 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002474 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002475 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002476 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002477 if (ctnetlink_exp_dump_tuple(skb,
2478 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2479 CTA_EXPECT_MASTER) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002480 goto nla_put_failure;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002481
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002482#ifdef CONFIG_NF_NAT_NEEDED
Patrick McHardyc7232c92012-08-26 19:14:06 +02002483 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2484 exp->saved_proto.all) {
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002485 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2486 if (!nest_parms)
2487 goto nla_put_failure;
2488
David S. Millercc1eb432012-04-01 18:57:48 -04002489 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2490 goto nla_put_failure;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002491
2492 nat_tuple.src.l3num = nf_ct_l3num(master);
Patrick McHardyc7232c92012-08-26 19:14:06 +02002493 nat_tuple.src.u3 = exp->saved_addr;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002494 nat_tuple.dst.protonum = nf_ct_protonum(master);
2495 nat_tuple.src.u = exp->saved_proto;
2496
2497 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2498 CTA_EXPECT_NAT_TUPLE) < 0)
2499 goto nla_put_failure;
2500 nla_nest_end(skb, nest_parms);
2501 }
2502#endif
David S. Millercc1eb432012-04-01 18:57:48 -04002503 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2504 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2505 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2506 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2507 goto nla_put_failure;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002508 help = nfct_help(master);
2509 if (help) {
2510 struct nf_conntrack_helper *helper;
2511
2512 helper = rcu_dereference(help->helper);
David S. Millercc1eb432012-04-01 18:57:48 -04002513 if (helper &&
2514 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2515 goto nla_put_failure;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002516 }
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002517 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
David S. Millercc1eb432012-04-01 18:57:48 -04002518 if (expfn != NULL &&
2519 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2520 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002521
2522 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002523
Patrick McHardydf6fb862007-09-28 14:37:03 -07002524nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002525 return -1;
2526}
2527
2528static int
Eric W. Biederman15e47302012-09-07 20:12:54 +00002529ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002530 int event, const struct nf_conntrack_expect *exp)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002531{
2532 struct nlmsghdr *nlh;
2533 struct nfgenmsg *nfmsg;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002534 unsigned int flags = portid ? NLM_F_MULTI : 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002535
2536 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002537 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002538 if (nlh == NULL)
2539 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002540
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002541 nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002542 nfmsg->nfgen_family = exp->tuple.src.l3num;
2543 nfmsg->version = NFNETLINK_V0;
2544 nfmsg->res_id = 0;
2545
2546 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002547 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002548
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002549 nlmsg_end(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002550 return skb->len;
2551
2552nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -07002553nla_put_failure:
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002554 nlmsg_cancel(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002555 return -1;
2556}
2557
2558#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002559static int
2560ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002561{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002562 struct nf_conntrack_expect *exp = item->exp;
2563 struct net *net = nf_ct_exp_net(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002564 struct nlmsghdr *nlh;
2565 struct nfgenmsg *nfmsg;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002566 struct sk_buff *skb;
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002567 unsigned int type, group;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002568 int flags = 0;
2569
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002570 if (events & (1 << IPEXP_DESTROY)) {
2571 type = IPCTNL_MSG_EXP_DELETE;
2572 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2573 } else if (events & (1 << IPEXP_NEW)) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002574 type = IPCTNL_MSG_EXP_NEW;
2575 flags = NLM_F_CREATE|NLM_F_EXCL;
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002576 group = NFNLGRP_CONNTRACK_EXP_NEW;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002577 } else
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002578 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002579
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002580 if (!item->report && !nfnetlink_has_listeners(net, group))
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002581 return 0;
Pablo Neira Ayusob3a27bf2006-08-22 00:32:05 -07002582
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002583 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2584 if (skb == NULL)
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +02002585 goto errout;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002586
Marcus Sundbergb633ad52006-02-04 02:11:09 -08002587 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002588 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002589 if (nlh == NULL)
2590 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002591
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002592 nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002593 nfmsg->nfgen_family = exp->tuple.src.l3num;
2594 nfmsg->version = NFNETLINK_V0;
2595 nfmsg->res_id = 0;
2596
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002597 rcu_read_lock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002598 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002599 goto nla_put_failure;
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002600 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002601
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002602 nlmsg_end(skb, nlh);
Eric W. Biederman15e47302012-09-07 20:12:54 +00002603 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002604 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002605
Patrick McHardydf6fb862007-09-28 14:37:03 -07002606nla_put_failure:
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002607 rcu_read_unlock();
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002608 nlmsg_cancel(skb, nlh);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002609nlmsg_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002610 kfree_skb(skb);
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +02002611errout:
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002612 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002613 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002614}
2615#endif
Patrick McHardycf6994c2007-07-07 22:32:34 -07002616static int ctnetlink_exp_done(struct netlink_callback *cb)
2617{
Patrick McHardy31f15872007-07-07 22:35:21 -07002618 if (cb->args[1])
2619 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
Patrick McHardycf6994c2007-07-07 22:32:34 -07002620 return 0;
2621}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002622
2623static int
2624ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2625{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002626 struct net *net = sock_net(skb->sk);
Patrick McHardycf6994c2007-07-07 22:32:34 -07002627 struct nf_conntrack_expect *exp, *last;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002628 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -08002629 u_int8_t l3proto = nfmsg->nfgen_family;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002630
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002631 rcu_read_lock();
Patrick McHardy31f15872007-07-07 22:35:21 -07002632 last = (struct nf_conntrack_expect *)cb->args[1];
2633 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
Patrick McHardycf6994c2007-07-07 22:32:34 -07002634restart:
Florian Westphal0a93aae2016-05-06 00:51:49 +02002635 hlist_for_each_entry(exp, &nf_ct_expect_hash[cb->args[0]],
Patrick McHardy31f15872007-07-07 22:35:21 -07002636 hnode) {
2637 if (l3proto && exp->tuple.src.l3num != l3proto)
Patrick McHardycf6994c2007-07-07 22:32:34 -07002638 continue;
Florian Westphal03d7dc52016-05-06 00:51:47 +02002639
2640 if (!net_eq(nf_ct_net(exp->master), net))
2641 continue;
2642
Patrick McHardy31f15872007-07-07 22:35:21 -07002643 if (cb->args[1]) {
2644 if (exp != last)
2645 continue;
2646 cb->args[1] = 0;
2647 }
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002648 if (ctnetlink_exp_fill_info(skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002649 NETLINK_CB(cb->skb).portid,
Patrick McHardy31f15872007-07-07 22:35:21 -07002650 cb->nlh->nlmsg_seq,
2651 IPCTNL_MSG_EXP_NEW,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002652 exp) < 0) {
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002653 if (!atomic_inc_not_zero(&exp->use))
2654 continue;
Patrick McHardy31f15872007-07-07 22:35:21 -07002655 cb->args[1] = (unsigned long)exp;
2656 goto out;
2657 }
Patrick McHardycf6994c2007-07-07 22:32:34 -07002658 }
Patrick McHardy31f15872007-07-07 22:35:21 -07002659 if (cb->args[1]) {
2660 cb->args[1] = 0;
2661 goto restart;
Patrick McHardycf6994c2007-07-07 22:32:34 -07002662 }
2663 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002664out:
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002665 rcu_read_unlock();
Patrick McHardycf6994c2007-07-07 22:32:34 -07002666 if (last)
2667 nf_ct_expect_put(last);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002668
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002669 return skb->len;
2670}
2671
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002672static int
2673ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2674{
2675 struct nf_conntrack_expect *exp, *last;
2676 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2677 struct nf_conn *ct = cb->data;
2678 struct nf_conn_help *help = nfct_help(ct);
2679 u_int8_t l3proto = nfmsg->nfgen_family;
2680
2681 if (cb->args[0])
2682 return 0;
2683
2684 rcu_read_lock();
2685 last = (struct nf_conntrack_expect *)cb->args[1];
2686restart:
2687 hlist_for_each_entry(exp, &help->expectations, lnode) {
2688 if (l3proto && exp->tuple.src.l3num != l3proto)
2689 continue;
2690 if (cb->args[1]) {
2691 if (exp != last)
2692 continue;
2693 cb->args[1] = 0;
2694 }
2695 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2696 cb->nlh->nlmsg_seq,
2697 IPCTNL_MSG_EXP_NEW,
2698 exp) < 0) {
2699 if (!atomic_inc_not_zero(&exp->use))
2700 continue;
2701 cb->args[1] = (unsigned long)exp;
2702 goto out;
2703 }
2704 }
2705 if (cb->args[1]) {
2706 cb->args[1] = 0;
2707 goto restart;
2708 }
2709 cb->args[0] = 1;
2710out:
2711 rcu_read_unlock();
2712 if (last)
2713 nf_ct_expect_put(last);
2714
2715 return skb->len;
2716}
2717
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01002718static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
2719 struct sk_buff *skb,
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002720 const struct nlmsghdr *nlh,
2721 const struct nlattr * const cda[])
2722{
2723 int err;
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002724 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2725 u_int8_t u3 = nfmsg->nfgen_family;
2726 struct nf_conntrack_tuple tuple;
2727 struct nf_conntrack_tuple_hash *h;
2728 struct nf_conn *ct;
Daniel Borkmann308ac912015-08-08 21:40:01 +02002729 struct nf_conntrack_zone zone;
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002730 struct netlink_dump_control c = {
2731 .dump = ctnetlink_exp_ct_dump_table,
2732 .done = ctnetlink_exp_done,
2733 };
2734
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002735 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2736 u3, NULL);
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002737 if (err < 0)
2738 return err;
2739
Daniel Borkmann308ac912015-08-08 21:40:01 +02002740 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2741 if (err < 0)
2742 return err;
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002743
Daniel Borkmann308ac912015-08-08 21:40:01 +02002744 h = nf_conntrack_find_get(net, &zone, &tuple);
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002745 if (!h)
2746 return -ENOENT;
2747
2748 ct = nf_ct_tuplehash_to_ctrack(h);
2749 c.data = ct;
2750
2751 err = netlink_dump_start(ctnl, skb, nlh, &c);
2752 nf_ct_put(ct);
2753
2754 return err;
2755}
2756
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01002757static int ctnetlink_get_expect(struct net *net, struct sock *ctnl,
2758 struct sk_buff *skb, const struct nlmsghdr *nlh,
2759 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002760{
2761 struct nf_conntrack_tuple tuple;
2762 struct nf_conntrack_expect *exp;
2763 struct sk_buff *skb2;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002764 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002765 u_int8_t u3 = nfmsg->nfgen_family;
Daniel Borkmann308ac912015-08-08 21:40:01 +02002766 struct nf_conntrack_zone zone;
Patrick McHardyef00f892010-02-15 18:14:57 +01002767 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002768
David S. Millerb8f3ab42011-01-18 12:40:38 -08002769 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002770 if (cda[CTA_EXPECT_MASTER])
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01002771 return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda);
Pablo Neira Ayusoe844a922013-03-17 23:21:36 +00002772 else {
2773 struct netlink_dump_control c = {
2774 .dump = ctnetlink_exp_dump_table,
2775 .done = ctnetlink_exp_done,
2776 };
2777 return netlink_dump_start(ctnl, skb, nlh, &c);
2778 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002779 }
2780
Patrick McHardyef00f892010-02-15 18:14:57 +01002781 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2782 if (err < 0)
2783 return err;
2784
Pablo Neira Ayuso35dba1d2011-12-14 12:45:22 +01002785 if (cda[CTA_EXPECT_TUPLE])
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002786 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2787 u3, NULL);
Pablo Neira Ayuso35dba1d2011-12-14 12:45:22 +01002788 else if (cda[CTA_EXPECT_MASTER])
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002789 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2790 u3, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002791 else
2792 return -EINVAL;
2793
2794 if (err < 0)
2795 return err;
2796
Daniel Borkmann308ac912015-08-08 21:40:01 +02002797 exp = nf_ct_expect_find_get(net, &zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002798 if (!exp)
2799 return -ENOENT;
2800
Patrick McHardydf6fb862007-09-28 14:37:03 -07002801 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08002802 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07002803 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07002804 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002805 return -ENOENT;
2806 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002807 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002808
2809 err = -ENOMEM;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002810 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002811 if (skb2 == NULL) {
2812 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002813 goto out;
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002814 }
Thomas Graf4e9b8262006-11-27 09:25:58 -08002815
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002816 rcu_read_lock();
Eric W. Biederman15e47302012-09-07 20:12:54 +00002817 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002818 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002819 rcu_read_unlock();
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002820 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002821 if (err <= 0)
2822 goto free;
2823
Eric W. Biederman15e47302012-09-07 20:12:54 +00002824 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002825 if (err < 0)
2826 goto out;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002827
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002828 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002829
2830free:
2831 kfree_skb(skb2);
2832out:
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002833 /* this avoids a loop in nfnetlink. */
2834 return err == -EAGAIN ? -ENOBUFS : err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002835}
2836
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01002837static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
2838 struct sk_buff *skb, const struct nlmsghdr *nlh,
2839 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002840{
Patrick McHardy31f15872007-07-07 22:35:21 -07002841 struct nf_conntrack_expect *exp;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002842 struct nf_conntrack_tuple tuple;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002843 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Sasha Levinb67bfe02013-02-27 17:06:00 -08002844 struct hlist_node *next;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002845 u_int8_t u3 = nfmsg->nfgen_family;
Daniel Borkmann308ac912015-08-08 21:40:01 +02002846 struct nf_conntrack_zone zone;
Patrick McHardy31f15872007-07-07 22:35:21 -07002847 unsigned int i;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002848 int err;
2849
Patrick McHardydf6fb862007-09-28 14:37:03 -07002850 if (cda[CTA_EXPECT_TUPLE]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002851 /* delete a single expect by tuple */
Patrick McHardyef00f892010-02-15 18:14:57 +01002852 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2853 if (err < 0)
2854 return err;
2855
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002856 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2857 u3, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002858 if (err < 0)
2859 return err;
2860
2861 /* bump usage count to 2 */
Daniel Borkmann308ac912015-08-08 21:40:01 +02002862 exp = nf_ct_expect_find_get(net, &zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002863 if (!exp)
2864 return -ENOENT;
2865
Patrick McHardydf6fb862007-09-28 14:37:03 -07002866 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08002867 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07002868 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07002869 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002870 return -ENOENT;
2871 }
2872 }
2873
2874 /* after list removal, usage count == 1 */
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002875 spin_lock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002876 if (del_timer(&exp->timeout)) {
Eric W. Biederman15e47302012-09-07 20:12:54 +00002877 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002878 nlmsg_report(nlh));
2879 nf_ct_expect_put(exp);
2880 }
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002881 spin_unlock_bh(&nf_conntrack_expect_lock);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002882 /* have to put what we 'get' above.
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002883 * after this line usage count == 0 */
Patrick McHardy68236452007-07-07 22:30:49 -07002884 nf_ct_expect_put(exp);
Patrick McHardydf6fb862007-09-28 14:37:03 -07002885 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2886 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
Patrick McHardy31f15872007-07-07 22:35:21 -07002887 struct nf_conn_help *m_help;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002888
2889 /* delete all expectations for this helper */
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002890 spin_lock_bh(&nf_conntrack_expect_lock);
Patrick McHardy31f15872007-07-07 22:35:21 -07002891 for (i = 0; i < nf_ct_expect_hsize; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08002892 hlist_for_each_entry_safe(exp, next,
Florian Westphal0a93aae2016-05-06 00:51:49 +02002893 &nf_ct_expect_hash[i],
Patrick McHardy31f15872007-07-07 22:35:21 -07002894 hnode) {
Florian Westphal03d7dc52016-05-06 00:51:47 +02002895
2896 if (!net_eq(nf_ct_exp_net(exp), net))
2897 continue;
2898
Patrick McHardy31f15872007-07-07 22:35:21 -07002899 m_help = nfct_help(exp->master);
Patrick McHardy794e6872010-02-03 13:41:29 +01002900 if (!strcmp(m_help->helper->name, name) &&
2901 del_timer(&exp->timeout)) {
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002902 nf_ct_unlink_expect_report(exp,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002903 NETLINK_CB(skb).portid,
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002904 nlmsg_report(nlh));
Patrick McHardy31f15872007-07-07 22:35:21 -07002905 nf_ct_expect_put(exp);
2906 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002907 }
2908 }
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002909 spin_unlock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002910 } else {
2911 /* This basically means we have to flush everything*/
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002912 spin_lock_bh(&nf_conntrack_expect_lock);
Patrick McHardy31f15872007-07-07 22:35:21 -07002913 for (i = 0; i < nf_ct_expect_hsize; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08002914 hlist_for_each_entry_safe(exp, next,
Florian Westphal0a93aae2016-05-06 00:51:49 +02002915 &nf_ct_expect_hash[i],
Patrick McHardy31f15872007-07-07 22:35:21 -07002916 hnode) {
Florian Westphal03d7dc52016-05-06 00:51:47 +02002917
2918 if (!net_eq(nf_ct_exp_net(exp), net))
2919 continue;
2920
Patrick McHardy31f15872007-07-07 22:35:21 -07002921 if (del_timer(&exp->timeout)) {
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002922 nf_ct_unlink_expect_report(exp,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002923 NETLINK_CB(skb).portid,
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002924 nlmsg_report(nlh));
Patrick McHardy31f15872007-07-07 22:35:21 -07002925 nf_ct_expect_put(exp);
2926 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002927 }
2928 }
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01002929 spin_unlock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002930 }
2931
2932 return 0;
2933}
2934static int
Patrick McHardy39938322009-08-25 16:07:58 +02002935ctnetlink_change_expect(struct nf_conntrack_expect *x,
2936 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002937{
Kelvie Wong9768e1a2012-05-02 14:39:24 +00002938 if (cda[CTA_EXPECT_TIMEOUT]) {
2939 if (!del_timer(&x->timeout))
2940 return -ETIME;
2941
2942 x->timeout.expires = jiffies +
2943 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2944 add_timer(&x->timeout);
2945 }
2946 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002947}
2948
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002949static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2950 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2951 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2952};
2953
2954static int
2955ctnetlink_parse_expect_nat(const struct nlattr *attr,
2956 struct nf_conntrack_expect *exp,
2957 u_int8_t u3)
2958{
2959#ifdef CONFIG_NF_NAT_NEEDED
2960 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2961 struct nf_conntrack_tuple nat_tuple = {};
2962 int err;
2963
Daniel Borkmann130ffbc2013-06-12 17:54:51 +02002964 err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2965 if (err < 0)
2966 return err;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002967
2968 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2969 return -EINVAL;
2970
2971 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
Daniel Borkmanndeedb592015-08-14 16:03:39 +02002972 &nat_tuple, CTA_EXPECT_NAT_TUPLE,
2973 u3, NULL);
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002974 if (err < 0)
2975 return err;
2976
Patrick McHardyc7232c92012-08-26 19:14:06 +02002977 exp->saved_addr = nat_tuple.src.u3;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002978 exp->saved_proto = nat_tuple.src.u;
2979 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2980
2981 return 0;
2982#else
2983 return -EOPNOTSUPP;
2984#endif
2985}
2986
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02002987static struct nf_conntrack_expect *
2988ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
2989 struct nf_conntrack_helper *helper,
2990 struct nf_conntrack_tuple *tuple,
2991 struct nf_conntrack_tuple *mask)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002992{
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002993 u_int32_t class = 0;
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02002994 struct nf_conntrack_expect *exp;
2995 struct nf_conn_help *help;
2996 int err;
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01002997
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002998 if (cda[CTA_EXPECT_CLASS] && helper) {
2999 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003000 if (class > helper->expect_class_max)
3001 return ERR_PTR(-EINVAL);
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01003002 }
Patrick McHardy68236452007-07-07 22:30:49 -07003003 exp = nf_ct_expect_alloc(ct);
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003004 if (!exp)
3005 return ERR_PTR(-ENOMEM);
3006
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02003007 help = nfct_help(ct);
3008 if (!help) {
3009 if (!cda[CTA_EXPECT_TIMEOUT]) {
3010 err = -EINVAL;
Jesper Juhl1310b9552012-12-26 11:49:40 +00003011 goto err_out;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02003012 }
3013 exp->timeout.expires =
3014 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08003015
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02003016 exp->flags = NF_CT_EXPECT_USERSPACE;
3017 if (cda[CTA_EXPECT_FLAGS]) {
3018 exp->flags |=
3019 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3020 }
3021 } else {
3022 if (cda[CTA_EXPECT_FLAGS]) {
3023 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3024 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
3025 } else
3026 exp->flags = 0;
3027 }
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01003028 if (cda[CTA_EXPECT_FN]) {
3029 const char *name = nla_data(cda[CTA_EXPECT_FN]);
3030 struct nf_ct_helper_expectfn *expfn;
3031
3032 expfn = nf_ct_helper_expectfn_find_by_name(name);
3033 if (expfn == NULL) {
3034 err = -EINVAL;
3035 goto err_out;
3036 }
3037 exp->expectfn = expfn->expectfn;
3038 } else
3039 exp->expectfn = NULL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003040
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01003041 exp->class = class;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003042 exp->master = ct;
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01003043 exp->helper = helper;
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003044 exp->tuple = *tuple;
3045 exp->mask.src.u3 = mask->src.u3;
3046 exp->mask.src.u.all = mask->src.u.all;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003047
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01003048 if (cda[CTA_EXPECT_NAT]) {
3049 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003050 exp, nf_ct_l3num(ct));
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01003051 if (err < 0)
3052 goto err_out;
3053 }
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003054 return exp;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01003055err_out:
Patrick McHardy68236452007-07-07 22:30:49 -07003056 nf_ct_expect_put(exp);
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003057 return ERR_PTR(err);
3058}
3059
3060static int
Daniel Borkmann308ac912015-08-08 21:40:01 +02003061ctnetlink_create_expect(struct net *net,
3062 const struct nf_conntrack_zone *zone,
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003063 const struct nlattr * const cda[],
3064 u_int8_t u3, u32 portid, int report)
3065{
3066 struct nf_conntrack_tuple tuple, mask, master_tuple;
3067 struct nf_conntrack_tuple_hash *h = NULL;
3068 struct nf_conntrack_helper *helper = NULL;
3069 struct nf_conntrack_expect *exp;
3070 struct nf_conn *ct;
3071 int err;
3072
3073 /* caller guarantees that those three CTA_EXPECT_* exist */
Daniel Borkmanndeedb592015-08-14 16:03:39 +02003074 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3075 u3, NULL);
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003076 if (err < 0)
3077 return err;
Daniel Borkmanndeedb592015-08-14 16:03:39 +02003078 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
3079 u3, NULL);
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003080 if (err < 0)
3081 return err;
Daniel Borkmanndeedb592015-08-14 16:03:39 +02003082 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
3083 u3, NULL);
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003084 if (err < 0)
3085 return err;
3086
3087 /* Look for master conntrack of this expectation */
3088 h = nf_conntrack_find_get(net, zone, &master_tuple);
3089 if (!h)
3090 return -ENOENT;
3091 ct = nf_ct_tuplehash_to_ctrack(h);
3092
3093 if (cda[CTA_EXPECT_HELP_NAME]) {
3094 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
3095
3096 helper = __nf_conntrack_helper_find(helpname, u3,
3097 nf_ct_protonum(ct));
3098 if (helper == NULL) {
3099#ifdef CONFIG_MODULES
3100 if (request_module("nfct-helper-%s", helpname) < 0) {
3101 err = -EOPNOTSUPP;
3102 goto err_ct;
3103 }
3104 helper = __nf_conntrack_helper_find(helpname, u3,
3105 nf_ct_protonum(ct));
3106 if (helper) {
3107 err = -EAGAIN;
3108 goto err_ct;
3109 }
3110#endif
3111 err = -EOPNOTSUPP;
3112 goto err_ct;
3113 }
3114 }
3115
3116 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
3117 if (IS_ERR(exp)) {
3118 err = PTR_ERR(exp);
3119 goto err_ct;
3120 }
3121
3122 err = nf_ct_expect_related_report(exp, portid, report);
Pablo Neira Ayuso0ef71ee2013-08-07 19:12:34 +02003123 nf_ct_expect_put(exp);
3124err_ct:
3125 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003126 return err;
3127}
3128
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01003129static int ctnetlink_new_expect(struct net *net, struct sock *ctnl,
3130 struct sk_buff *skb, const struct nlmsghdr *nlh,
3131 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003132{
3133 struct nf_conntrack_tuple tuple;
3134 struct nf_conntrack_expect *exp;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02003135 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003136 u_int8_t u3 = nfmsg->nfgen_family;
Daniel Borkmann308ac912015-08-08 21:40:01 +02003137 struct nf_conntrack_zone zone;
Patrick McHardyef00f892010-02-15 18:14:57 +01003138 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003139
Patrick McHardydf6fb862007-09-28 14:37:03 -07003140 if (!cda[CTA_EXPECT_TUPLE]
3141 || !cda[CTA_EXPECT_MASK]
3142 || !cda[CTA_EXPECT_MASTER])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003143 return -EINVAL;
3144
Patrick McHardyef00f892010-02-15 18:14:57 +01003145 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3146 if (err < 0)
3147 return err;
3148
Daniel Borkmanndeedb592015-08-14 16:03:39 +02003149 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3150 u3, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003151 if (err < 0)
3152 return err;
3153
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01003154 spin_lock_bh(&nf_conntrack_expect_lock);
Daniel Borkmann308ac912015-08-08 21:40:01 +02003155 exp = __nf_ct_expect_find(net, &zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003156 if (!exp) {
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01003157 spin_unlock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003158 err = -ENOENT;
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01003159 if (nlh->nlmsg_flags & NLM_F_CREATE) {
Daniel Borkmann308ac912015-08-08 21:40:01 +02003160 err = ctnetlink_create_expect(net, &zone, cda, u3,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003161 NETLINK_CB(skb).portid,
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01003162 nlmsg_report(nlh));
3163 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003164 return err;
3165 }
3166
3167 err = -EEXIST;
3168 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
3169 err = ctnetlink_change_expect(exp, cda);
Jesper Dangaard Brouerca7433d2014-03-03 14:46:01 +01003170 spin_unlock_bh(&nf_conntrack_expect_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003171
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003172 return err;
3173}
3174
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003175static int
Eric W. Biederman15e47302012-09-07 20:12:54 +00003176ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003177 const struct ip_conntrack_stat *st)
3178{
3179 struct nlmsghdr *nlh;
3180 struct nfgenmsg *nfmsg;
Eric W. Biederman15e47302012-09-07 20:12:54 +00003181 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003182
3183 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU);
Eric W. Biederman15e47302012-09-07 20:12:54 +00003184 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003185 if (nlh == NULL)
3186 goto nlmsg_failure;
3187
3188 nfmsg = nlmsg_data(nlh);
3189 nfmsg->nfgen_family = AF_UNSPEC;
3190 nfmsg->version = NFNETLINK_V0;
3191 nfmsg->res_id = htons(cpu);
3192
3193 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3194 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3195 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3196 goto nla_put_failure;
3197
3198 nlmsg_end(skb, nlh);
3199 return skb->len;
3200
3201nla_put_failure:
3202nlmsg_failure:
3203 nlmsg_cancel(skb, nlh);
3204 return -1;
3205}
3206
3207static int
3208ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3209{
3210 int cpu;
3211 struct net *net = sock_net(skb->sk);
3212
3213 if (cb->args[0] == nr_cpu_ids)
3214 return 0;
3215
3216 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3217 const struct ip_conntrack_stat *st;
3218
3219 if (!cpu_possible(cpu))
3220 continue;
3221
3222 st = per_cpu_ptr(net->ct.stat, cpu);
Eric W. Biederman15e47302012-09-07 20:12:54 +00003223 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003224 cb->nlh->nlmsg_seq,
3225 cpu, st) < 0)
3226 break;
3227 }
3228 cb->args[0] = cpu;
3229
3230 return skb->len;
3231}
3232
Pablo Neira Ayuso7b8002a2015-12-15 18:41:56 +01003233static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl,
3234 struct sk_buff *skb,
3235 const struct nlmsghdr *nlh,
3236 const struct nlattr * const cda[])
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003237{
3238 if (nlh->nlmsg_flags & NLM_F_DUMP) {
3239 struct netlink_dump_control c = {
3240 .dump = ctnetlink_exp_stat_cpu_dump,
3241 };
3242 return netlink_dump_start(ctnl, skb, nlh, &c);
3243 }
3244
3245 return 0;
3246}
3247
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003248#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02003249static struct nf_ct_event_notifier ctnl_notifier = {
3250 .fcn = ctnetlink_conntrack_event,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003251};
3252
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02003253static struct nf_exp_event_notifier ctnl_notifier_exp = {
3254 .fcn = ctnetlink_expect_event,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003255};
3256#endif
3257
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07003258static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003259 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07003260 .attr_count = CTA_MAX,
3261 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003262 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07003263 .attr_count = CTA_MAX,
3264 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003265 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07003266 .attr_count = CTA_MAX,
3267 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003268 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07003269 .attr_count = CTA_MAX,
3270 .policy = ct_nla_policy },
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003271 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
3272 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
Pablo Neira Ayusod871bef2012-11-27 14:49:42 +01003273 [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying },
3274 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003275};
3276
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07003277static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003278 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07003279 .attr_count = CTA_EXPECT_MAX,
3280 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003281 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07003282 .attr_count = CTA_EXPECT_MAX,
3283 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003284 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07003285 .attr_count = CTA_EXPECT_MAX,
3286 .policy = exp_nla_policy },
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02003287 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003288};
3289
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07003290static const struct nfnetlink_subsystem ctnl_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003291 .name = "conntrack",
3292 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3293 .cb_count = IPCTNL_MSG_MAX,
3294 .cb = ctnl_cb,
3295};
3296
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07003297static const struct nfnetlink_subsystem ctnl_exp_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003298 .name = "conntrack_expect",
3299 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3300 .cb_count = IPCTNL_MSG_EXP_MAX,
3301 .cb = ctnl_exp_cb,
3302};
3303
Patrick McHardyd2483dd2006-12-02 22:06:05 -08003304MODULE_ALIAS("ip_conntrack_netlink");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003305MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
Pablo Neira Ayuso34f9a2e2006-02-04 02:11:41 -08003306MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003307
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01003308static int __net_init ctnetlink_net_init(struct net *net)
3309{
3310#ifdef CONFIG_NF_CONNTRACK_EVENTS
3311 int ret;
3312
3313 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
3314 if (ret < 0) {
3315 pr_err("ctnetlink_init: cannot register notifier.\n");
3316 goto err_out;
3317 }
3318
3319 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
3320 if (ret < 0) {
3321 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3322 goto err_unreg_notifier;
3323 }
3324#endif
3325 return 0;
3326
3327#ifdef CONFIG_NF_CONNTRACK_EVENTS
3328err_unreg_notifier:
3329 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3330err_out:
3331 return ret;
3332#endif
3333}
3334
3335static void ctnetlink_net_exit(struct net *net)
3336{
3337#ifdef CONFIG_NF_CONNTRACK_EVENTS
3338 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
3339 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3340#endif
3341}
3342
3343static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
3344{
3345 struct net *net;
3346
3347 list_for_each_entry(net, net_exit_list, exit_list)
3348 ctnetlink_net_exit(net);
3349}
3350
3351static struct pernet_operations ctnetlink_net_ops = {
3352 .init = ctnetlink_net_init,
3353 .exit_batch = ctnetlink_net_exit_batch,
3354};
3355
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003356static int __init ctnetlink_init(void)
3357{
3358 int ret;
3359
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02003360 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003361 ret = nfnetlink_subsys_register(&ctnl_subsys);
3362 if (ret < 0) {
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02003363 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003364 goto err_out;
3365 }
3366
3367 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3368 if (ret < 0) {
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02003369 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003370 goto err_unreg_subsys;
3371 }
3372
Julia Lawallef6acf62012-08-29 06:49:16 +00003373 ret = register_pernet_subsys(&ctnetlink_net_ops);
3374 if (ret < 0) {
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01003375 pr_err("ctnetlink_init: cannot register pernet operations\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003376 goto err_unreg_exp_subsys;
3377 }
Ken-ichirou MATSUZAWA83f3e942015-10-05 11:48:47 +09003378#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02003379 /* setup interaction between nf_queue and nf_conntrack_netlink. */
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09003380 RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook);
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02003381#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003382 return 0;
3383
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003384err_unreg_exp_subsys:
3385 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003386err_unreg_subsys:
3387 nfnetlink_subsys_unregister(&ctnl_subsys);
3388err_out:
3389 return ret;
3390}
3391
3392static void __exit ctnetlink_exit(void)
3393{
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02003394 pr_info("ctnetlink: unregistering from nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003395
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01003396 unregister_pernet_subsys(&ctnetlink_net_ops);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003397 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3398 nfnetlink_subsys_unregister(&ctnl_subsys);
Ken-ichirou MATSUZAWA83f3e942015-10-05 11:48:47 +09003399#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
Ken-ichirou MATSUZAWAa4b47662015-10-05 11:47:13 +09003400 RCU_INIT_POINTER(nfnl_ct_hook, NULL);
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02003401#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08003402}
3403
3404module_init(ctnetlink_init);
3405module_exit(ctnetlink_exit);