blob: 966f5133a38440d316cff53328a58212297d6761 [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>
40#include <net/netfilter/nf_conntrack_l3proto.h>
Martin Josefsson605dcad2006-11-29 02:35:06 +010041#include <net/netfilter/nf_conntrack_l4proto.h>
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -080042#include <net/netfilter/nf_conntrack_tuple.h>
Krzysztof Piotr Oledzki58401572008-07-21 10:01:34 -070043#include <net/netfilter/nf_conntrack_acct.h>
Patrick McHardyef00f892010-02-15 18:14:57 +010044#include <net/netfilter/nf_conntrack_zones.h>
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +010045#include <net/netfilter/nf_conntrack_timestamp.h>
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -080046#ifdef CONFIG_NF_NAT_NEEDED
47#include <net/netfilter/nf_nat_core.h>
Patrick McHardyc7232c92012-08-26 19:14:06 +020048#include <net/netfilter/nf_nat_l4proto.h>
Pablo Neira Ayuso8c88f872012-06-07 13:31:25 +020049#include <net/netfilter/nf_nat_helper.h>
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -080050#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080051
52#include <linux/netfilter/nfnetlink.h>
53#include <linux/netfilter/nfnetlink_conntrack.h>
54
55MODULE_LICENSE("GPL");
56
Harald Weltedc808fe2006-03-20 17:56:32 -080057static char __initdata version[] = "0.93";
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080058
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080059static inline int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -080060ctnetlink_dump_tuples_proto(struct sk_buff *skb,
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -080061 const struct nf_conntrack_tuple *tuple,
Martin Josefsson605dcad2006-11-29 02:35:06 +010062 struct nf_conntrack_l4proto *l4proto)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080063{
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080064 int ret = 0;
Patrick McHardydf6fb862007-09-28 14:37:03 -070065 struct nlattr *nest_parms;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080066
Patrick McHardydf6fb862007-09-28 14:37:03 -070067 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
68 if (!nest_parms)
69 goto nla_put_failure;
David S. Millercc1eb432012-04-01 18:57:48 -040070 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
71 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080072
Patrick McHardyfdf70832007-09-28 14:37:41 -070073 if (likely(l4proto->tuple_to_nlattr))
74 ret = l4proto->tuple_to_nlattr(skb, tuple);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -080075
Patrick McHardydf6fb862007-09-28 14:37:03 -070076 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080077
78 return ret;
79
Patrick McHardydf6fb862007-09-28 14:37:03 -070080nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080081 return -1;
82}
83
84static inline int
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -080085ctnetlink_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
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800107static int
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800108ctnetlink_dump_tuples(struct sk_buff *skb,
109 const struct nf_conntrack_tuple *tuple)
110{
111 int ret;
112 struct nf_conntrack_l3proto *l3proto;
Martin Josefsson605dcad2006-11-29 02:35:06 +0100113 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800114
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000115 rcu_read_lock();
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100116 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800117 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800118
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000119 if (ret >= 0) {
120 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
121 tuple->dst.protonum);
122 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
123 }
124 rcu_read_unlock();
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800125 return ret;
126}
127
128static inline int
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800129ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
130{
David S. Millercc1eb432012-04-01 18:57:48 -0400131 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
132 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800133 return 0;
134
Patrick McHardydf6fb862007-09-28 14:37:03 -0700135nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800136 return -1;
137}
138
139static inline int
140ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
141{
Xi Wangc1216382011-12-30 10:40:17 -0500142 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800143
Patrick McHardy77236b62007-12-17 22:29:45 -0800144 if (timeout < 0)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800145 timeout = 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800146
David S. Millercc1eb432012-04-01 18:57:48 -0400147 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
148 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800149 return 0;
150
Patrick McHardydf6fb862007-09-28 14:37:03 -0700151nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800152 return -1;
153}
154
155static inline int
Patrick McHardy440f0d52009-06-10 14:32:47 +0200156ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800157{
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200158 struct nf_conntrack_l4proto *l4proto;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700159 struct nlattr *nest_proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800160 int ret;
161
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100162 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
163 if (!l4proto->to_nlattr)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800164 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800165
Patrick McHardydf6fb862007-09-28 14:37:03 -0700166 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
167 if (!nest_proto)
168 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800169
Patrick McHardyfdf70832007-09-28 14:37:41 -0700170 ret = l4proto->to_nlattr(skb, nest_proto, ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800171
Patrick McHardydf6fb862007-09-28 14:37:03 -0700172 nla_nest_end(skb, nest_proto);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800173
174 return ret;
175
Patrick McHardydf6fb862007-09-28 14:37:03 -0700176nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800177 return -1;
178}
179
180static inline int
181ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
182{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700183 struct nlattr *nest_helper;
Harald Weltedc808fe2006-03-20 17:56:32 -0800184 const struct nf_conn_help *help = nfct_help(ct);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700185 struct nf_conntrack_helper *helper;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800186
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700187 if (!help)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800188 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800189
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700190 helper = rcu_dereference(help->helper);
191 if (!helper)
192 goto out;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800193
Patrick McHardydf6fb862007-09-28 14:37:03 -0700194 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
195 if (!nest_helper)
196 goto nla_put_failure;
David S. Millercc1eb432012-04-01 18:57:48 -0400197 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
198 goto nla_put_failure;
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700199
Patrick McHardyfdf70832007-09-28 14:37:41 -0700200 if (helper->to_nlattr)
201 helper->to_nlattr(skb, ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800202
Patrick McHardydf6fb862007-09-28 14:37:03 -0700203 nla_nest_end(skb, nest_helper);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700204out:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800205 return 0;
206
Patrick McHardydf6fb862007-09-28 14:37:03 -0700207nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800208 return -1;
209}
210
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800211static int
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100212dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes,
213 enum ip_conntrack_dir dir)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800214{
215 enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700216 struct nlattr *nest_count;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800217
Patrick McHardydf6fb862007-09-28 14:37:03 -0700218 nest_count = nla_nest_start(skb, type | NLA_F_NESTED);
219 if (!nest_count)
220 goto nla_put_failure;
221
David S. Millercc1eb432012-04-01 18:57:48 -0400222 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) ||
223 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes)))
224 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800225
Patrick McHardydf6fb862007-09-28 14:37:03 -0700226 nla_nest_end(skb, nest_count);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800227
228 return 0;
229
Patrick McHardydf6fb862007-09-28 14:37:03 -0700230nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800231 return -1;
232}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800233
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100234static int
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100235ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
236 enum ip_conntrack_dir dir, int type)
237{
238 struct nf_conn_counter *acct;
239 u64 pkts, bytes;
240
241 acct = nf_conn_acct_find(ct);
242 if (!acct)
243 return 0;
244
245 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
246 pkts = atomic64_xchg(&acct[dir].packets, 0);
247 bytes = atomic64_xchg(&acct[dir].bytes, 0);
248 } else {
249 pkts = atomic64_read(&acct[dir].packets);
250 bytes = atomic64_read(&acct[dir].bytes);
251 }
252 return dump_counters(skb, pkts, bytes, dir);
253}
254
255static int
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100256ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
257{
258 struct nlattr *nest_count;
259 const struct nf_conn_tstamp *tstamp;
260
261 tstamp = nf_conn_tstamp_find(ct);
262 if (!tstamp)
263 return 0;
264
265 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
266 if (!nest_count)
267 goto nla_put_failure;
268
David S. Millercc1eb432012-04-01 18:57:48 -0400269 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) ||
270 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
271 cpu_to_be64(tstamp->stop))))
272 goto nla_put_failure;
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100273 nla_nest_end(skb, nest_count);
274
275 return 0;
276
277nla_put_failure:
278 return -1;
279}
280
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800281#ifdef CONFIG_NF_CONNTRACK_MARK
282static inline int
283ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
284{
David S. Millercc1eb432012-04-01 18:57:48 -0400285 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
286 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800287 return 0;
288
Patrick McHardydf6fb862007-09-28 14:37:03 -0700289nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800290 return -1;
291}
292#else
293#define ctnetlink_dump_mark(a, b) (0)
294#endif
295
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800296#ifdef CONFIG_NF_CONNTRACK_SECMARK
297static inline int
Eric Paris1cc63242010-10-13 16:24:54 -0400298ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800299{
Eric Paris1cc63242010-10-13 16:24:54 -0400300 struct nlattr *nest_secctx;
301 int len, ret;
302 char *secctx;
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800303
Eric Paris1cc63242010-10-13 16:24:54 -0400304 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
305 if (ret)
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800306 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400307
308 ret = -1;
309 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
310 if (!nest_secctx)
311 goto nla_put_failure;
312
David S. Millercc1eb432012-04-01 18:57:48 -0400313 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
314 goto nla_put_failure;
Eric Paris1cc63242010-10-13 16:24:54 -0400315 nla_nest_end(skb, nest_secctx);
316
317 ret = 0;
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800318nla_put_failure:
Eric Paris1cc63242010-10-13 16:24:54 -0400319 security_release_secctx(secctx, len);
320 return ret;
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800321}
322#else
Eric Paris1cc63242010-10-13 16:24:54 -0400323#define ctnetlink_dump_secctx(a, b) (0)
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800324#endif
325
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800326#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
327
328static inline int
329ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
330{
331 struct nlattr *nest_parms;
332
333 if (!(ct->status & IPS_EXPECTED))
334 return 0;
335
336 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
337 if (!nest_parms)
338 goto nla_put_failure;
339 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
340 goto nla_put_failure;
341 nla_nest_end(skb, nest_parms);
342
343 return 0;
344
345nla_put_failure:
346 return -1;
347}
348
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800349#ifdef CONFIG_NF_NAT_NEEDED
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800350static int
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800351dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type)
352{
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800353 struct nlattr *nest_parms;
354
355 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
356 if (!nest_parms)
357 goto nla_put_failure;
358
David S. Millercc1eb432012-04-01 18:57:48 -0400359 if (nla_put_be32(skb, CTA_NAT_SEQ_CORRECTION_POS,
360 htonl(natseq->correction_pos)) ||
361 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_BEFORE,
362 htonl(natseq->offset_before)) ||
363 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_AFTER,
364 htonl(natseq->offset_after)))
365 goto nla_put_failure;
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800366
367 nla_nest_end(skb, nest_parms);
368
369 return 0;
370
371nla_put_failure:
372 return -1;
373}
374
375static inline int
376ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
377{
378 struct nf_nat_seq *natseq;
379 struct nf_conn_nat *nat = nfct_nat(ct);
380
381 if (!(ct->status & IPS_SEQ_ADJUST) || !nat)
382 return 0;
383
384 natseq = &nat->seq[IP_CT_DIR_ORIGINAL];
385 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1)
386 return -1;
387
388 natseq = &nat->seq[IP_CT_DIR_REPLY];
389 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1)
390 return -1;
391
392 return 0;
393}
394#else
395#define ctnetlink_dump_nat_seq_adj(a, b) (0)
396#endif
397
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800398static inline int
399ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
400{
David S. Millercc1eb432012-04-01 18:57:48 -0400401 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
402 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800403 return 0;
404
Patrick McHardydf6fb862007-09-28 14:37:03 -0700405nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800406 return -1;
407}
408
409static inline int
410ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
411{
David S. Millercc1eb432012-04-01 18:57:48 -0400412 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
413 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800414 return 0;
415
Patrick McHardydf6fb862007-09-28 14:37:03 -0700416nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800417 return -1;
418}
419
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800420static int
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100421ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, u32 type,
422 struct nf_conn *ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800423{
424 struct nlmsghdr *nlh;
425 struct nfgenmsg *nfmsg;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700426 struct nlattr *nest_parms;
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100427 unsigned int flags = pid ? NLM_F_MULTI : 0, event;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800428
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100429 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200430 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
431 if (nlh == NULL)
432 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800433
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200434 nfmsg = nlmsg_data(nlh);
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200435 nfmsg->nfgen_family = nf_ct_l3num(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800436 nfmsg->version = NFNETLINK_V0;
437 nfmsg->res_id = 0;
438
Patrick McHardydf6fb862007-09-28 14:37:03 -0700439 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
440 if (!nest_parms)
441 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200442 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700443 goto nla_put_failure;
444 nla_nest_end(skb, nest_parms);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800445
Patrick McHardydf6fb862007-09-28 14:37:03 -0700446 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
447 if (!nest_parms)
448 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200449 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700450 goto nla_put_failure;
451 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800452
David S. Millercc1eb432012-04-01 18:57:48 -0400453 if (nf_ct_zone(ct) &&
454 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
455 goto nla_put_failure;
Patrick McHardyef00f892010-02-15 18:14:57 +0100456
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800457 if (ctnetlink_dump_status(skb, ct) < 0 ||
458 ctnetlink_dump_timeout(skb, ct) < 0 ||
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100459 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 ||
460 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 ||
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100461 ctnetlink_dump_timestamp(skb, ct) < 0 ||
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800462 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
463 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
464 ctnetlink_dump_mark(skb, ct) < 0 ||
Eric Paris1cc63242010-10-13 16:24:54 -0400465 ctnetlink_dump_secctx(skb, ct) < 0 ||
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800466 ctnetlink_dump_id(skb, ct) < 0 ||
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800467 ctnetlink_dump_use(skb, ct) < 0 ||
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800468 ctnetlink_dump_master(skb, ct) < 0 ||
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800469 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700470 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800471
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200472 nlmsg_end(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800473 return skb->len;
474
475nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -0700476nla_put_failure:
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200477 nlmsg_cancel(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800478 return -1;
479}
480
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200481static inline size_t
482ctnetlink_proto_size(const struct nf_conn *ct)
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100483{
484 struct nf_conntrack_l3proto *l3proto;
485 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200486 size_t len = 0;
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100487
488 rcu_read_lock();
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200489 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100490 len += l3proto->nla_size;
491
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200492 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100493 len += l4proto->nla_size;
494 rcu_read_unlock();
495
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200496 return len;
497}
498
499static inline size_t
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200500ctnetlink_counters_size(const struct nf_conn *ct)
501{
502 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
503 return 0;
504 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
505 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
506 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
507 ;
508}
509
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800510static inline int
511ctnetlink_secctx_size(const struct nf_conn *ct)
Eric Paris1cc63242010-10-13 16:24:54 -0400512{
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800513#ifdef CONFIG_NF_CONNTRACK_SECMARK
514 int len, ret;
Eric Paris1cc63242010-10-13 16:24:54 -0400515
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800516 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
517 if (ret)
518 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400519
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800520 return nla_total_size(0) /* CTA_SECCTX */
521 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
522#else
523 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400524#endif
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800525}
Eric Paris1cc63242010-10-13 16:24:54 -0400526
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200527static inline size_t
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100528ctnetlink_timestamp_size(const struct nf_conn *ct)
529{
530#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
531 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
532 return 0;
533 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
534#else
535 return 0;
536#endif
537}
538
539static inline size_t
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200540ctnetlink_nlmsg_size(const struct nf_conn *ct)
541{
542 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
543 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
544 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
545 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
546 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
547 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
548 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200549 + ctnetlink_counters_size(ct)
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100550 + ctnetlink_timestamp_size(ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200551 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
552 + nla_total_size(0) /* CTA_PROTOINFO */
553 + nla_total_size(0) /* CTA_HELP */
554 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800555 + ctnetlink_secctx_size(ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200556#ifdef CONFIG_NF_NAT_NEEDED
557 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
558 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
559#endif
560#ifdef CONFIG_NF_CONNTRACK_MARK
561 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
562#endif
563 + ctnetlink_proto_size(ct)
564 ;
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100565}
566
Pablo Neira Ayuso8e36c4b2012-06-23 01:43:51 +0200567#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200568static int
569ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800570{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100571 struct net *net;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800572 struct nlmsghdr *nlh;
573 struct nfgenmsg *nfmsg;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700574 struct nlattr *nest_parms;
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +0100575 struct nf_conn *ct = item->ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800576 struct sk_buff *skb;
577 unsigned int type;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800578 unsigned int flags = 0, group;
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200579 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800580
581 /* ignore our fake conntrack entry */
Eric Dumazet5bfddbd2010-06-08 16:09:52 +0200582 if (nf_ct_is_untracked(ct))
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200583 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800584
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200585 if (events & (1 << IPCT_DESTROY)) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800586 type = IPCTNL_MSG_CT_DELETE;
587 group = NFNLGRP_CONNTRACK_DESTROY;
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200588 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800589 type = IPCTNL_MSG_CT_NEW;
590 flags = NLM_F_CREATE|NLM_F_EXCL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800591 group = NFNLGRP_CONNTRACK_NEW;
Pablo Neira Ayuso17e6e4e2009-06-02 20:08:46 +0200592 } else if (events) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800593 type = IPCTNL_MSG_CT_NEW;
594 group = NFNLGRP_CONNTRACK_UPDATE;
595 } else
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200596 return 0;
Patrick McHardya2427692006-03-20 18:03:59 -0800597
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100598 net = nf_ct_net(ct);
599 if (!item->report && !nfnetlink_has_listeners(net, group))
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200600 return 0;
Patrick McHardya2427692006-03-20 18:03:59 -0800601
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200602 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
603 if (skb == NULL)
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +0200604 goto errout;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800605
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800606 type |= NFNL_SUBSYS_CTNETLINK << 8;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200607 nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags);
608 if (nlh == NULL)
609 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800610
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200611 nfmsg = nlmsg_data(nlh);
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200612 nfmsg->nfgen_family = nf_ct_l3num(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800613 nfmsg->version = NFNETLINK_V0;
614 nfmsg->res_id = 0;
615
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100616 rcu_read_lock();
Patrick McHardydf6fb862007-09-28 14:37:03 -0700617 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
618 if (!nest_parms)
619 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200620 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700621 goto nla_put_failure;
622 nla_nest_end(skb, nest_parms);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800623
Patrick McHardydf6fb862007-09-28 14:37:03 -0700624 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
625 if (!nest_parms)
626 goto nla_put_failure;
Pablo Neira Ayusof2f3e382009-06-02 20:03:35 +0200627 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700628 goto nla_put_failure;
629 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800630
David S. Millercc1eb432012-04-01 18:57:48 -0400631 if (nf_ct_zone(ct) &&
632 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
633 goto nla_put_failure;
Patrick McHardyef00f892010-02-15 18:14:57 +0100634
Eric Leblond1eedf692008-05-13 23:27:11 -0700635 if (ctnetlink_dump_id(skb, ct) < 0)
636 goto nla_put_failure;
637
Fabian Hugelshofere57dce62008-06-09 15:59:58 -0700638 if (ctnetlink_dump_status(skb, ct) < 0)
639 goto nla_put_failure;
640
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200641 if (events & (1 << IPCT_DESTROY)) {
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +0100642 if (ctnetlink_dump_counters(skb, ct,
643 IP_CT_DIR_ORIGINAL, type) < 0 ||
644 ctnetlink_dump_counters(skb, ct,
645 IP_CT_DIR_REPLY, type) < 0 ||
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100646 ctnetlink_dump_timestamp(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700647 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100648 } else {
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100649 if (ctnetlink_dump_timeout(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700650 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100651
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200652 if (events & (1 << IPCT_PROTOINFO)
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100653 && ctnetlink_dump_protoinfo(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700654 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100655
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200656 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100657 && ctnetlink_dump_helpinfo(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700658 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100659
Eric Parisff660c82010-10-19 18:17:32 -0400660#ifdef CONFIG_NF_CONNTRACK_SECMARK
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200661 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
Eric Paris1cc63242010-10-13 16:24:54 -0400662 && ctnetlink_dump_secctx(skb, ct) < 0)
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800663 goto nla_put_failure;
Eric Parisff660c82010-10-19 18:17:32 -0400664#endif
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100665
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200666 if (events & (1 << IPCT_RELATED) &&
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800667 ctnetlink_dump_master(skb, ct) < 0)
668 goto nla_put_failure;
669
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200670 if (events & (1 << IPCT_NATSEQADJ) &&
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800671 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
672 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100673 }
Pablo Neira Ayusob9a37e02006-08-22 00:31:49 -0700674
Eric Leblonda83099a2008-01-31 04:44:27 -0800675#ifdef CONFIG_NF_CONNTRACK_MARK
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +0200676 if ((events & (1 << IPCT_MARK) || ct->mark)
Eric Leblonda83099a2008-01-31 04:44:27 -0800677 && ctnetlink_dump_mark(skb, ct) < 0)
678 goto nla_put_failure;
679#endif
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100680 rcu_read_unlock();
Eric Leblonda83099a2008-01-31 04:44:27 -0800681
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200682 nlmsg_end(skb, nlh);
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100683 err = nfnetlink_send(skb, net, item->pid, group, item->report,
Alexey Dobriyancd8c20b2010-01-13 16:02:14 +0100684 GFP_ATOMIC);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200685 if (err == -ENOBUFS || err == -EAGAIN)
686 return -ENOBUFS;
687
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200688 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800689
Patrick McHardydf6fb862007-09-28 14:37:03 -0700690nla_put_failure:
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100691 rcu_read_unlock();
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200692 nlmsg_cancel(skb, nlh);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +0100693nlmsg_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800694 kfree_skb(skb);
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +0200695errout:
Pablo Neira Ayuso37b7ef72010-03-16 13:30:21 +0000696 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
697 return -ENOBUFS;
698
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +0200699 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800700}
701#endif /* CONFIG_NF_CONNTRACK_EVENTS */
702
703static int ctnetlink_done(struct netlink_callback *cb)
704{
Patrick McHardy89f2e212006-05-29 18:24:58 -0700705 if (cb->args[1])
706 nf_ct_put((struct nf_conn *)cb->args[1]);
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000707 if (cb->data)
708 kfree(cb->data);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800709 return 0;
710}
711
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000712struct ctnetlink_dump_filter {
713 struct {
714 u_int32_t val;
715 u_int32_t mask;
716 } mark;
717};
718
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800719static int
720ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
721{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100722 struct net *net = sock_net(skb->sk);
Patrick McHardy89f2e212006-05-29 18:24:58 -0700723 struct nf_conn *ct, *last;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800724 struct nf_conntrack_tuple_hash *h;
Eric Dumazetea781f12009-03-25 21:05:46 +0100725 struct hlist_nulls_node *n;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200726 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -0800727 u_int8_t l3proto = nfmsg->nfgen_family;
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000728 int res;
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000729#ifdef CONFIG_NF_CONNTRACK_MARK
730 const struct ctnetlink_dump_filter *filter = cb->data;
731#endif
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000732
Stephen Hemminger13ee6ac2011-01-11 23:54:42 +0100733 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardyd205dc42006-08-17 18:12:38 -0700734 last = (struct nf_conn *)cb->args[1];
Patrick McHardy9ab99d52010-02-10 14:17:10 +0100735 for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) {
Patrick McHardy89f2e212006-05-29 18:24:58 -0700736restart:
Stephen Hemminger13ee6ac2011-01-11 23:54:42 +0100737 hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]],
Eric Dumazetea781f12009-03-25 21:05:46 +0100738 hnnode) {
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800739 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800740 continue;
741 ct = nf_ct_tuplehash_to_ctrack(h);
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -0800742 /* Dump entries of a given L3 protocol number.
743 * If it is not specified, ie. l3proto == 0,
744 * then dump everything. */
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200745 if (l3proto && nf_ct_l3num(ct) != l3proto)
Stephen Hemminger13ee6ac2011-01-11 23:54:42 +0100746 continue;
Patrick McHardyd205dc42006-08-17 18:12:38 -0700747 if (cb->args[1]) {
748 if (ct != last)
Stephen Hemminger13ee6ac2011-01-11 23:54:42 +0100749 continue;
Patrick McHardyd205dc42006-08-17 18:12:38 -0700750 cb->args[1] = 0;
Patrick McHardy89f2e212006-05-29 18:24:58 -0700751 }
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000752#ifdef CONFIG_NF_CONNTRACK_MARK
753 if (filter && !((ct->mark & filter->mark.mask) ==
754 filter->mark.val)) {
755 continue;
756 }
757#endif
Hans Schillstrom3b988ec2012-03-05 02:24:29 +0000758 rcu_read_lock();
759 res =
760 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
761 cb->nlh->nlmsg_seq,
762 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
763 ct);
764 rcu_read_unlock();
765 if (res < 0) {
Pablo Neira Ayusoc71caf42011-01-24 19:01:07 +0100766 nf_conntrack_get(&ct->ct_general);
Patrick McHardy89f2e212006-05-29 18:24:58 -0700767 cb->args[1] = (unsigned long)ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800768 goto out;
Patrick McHardy89f2e212006-05-29 18:24:58 -0700769 }
770 }
Patrick McHardyd205dc42006-08-17 18:12:38 -0700771 if (cb->args[1]) {
Patrick McHardy89f2e212006-05-29 18:24:58 -0700772 cb->args[1] = 0;
773 goto restart;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800774 }
775 }
Patrick McHardy89f2e212006-05-29 18:24:58 -0700776out:
Stephen Hemminger13ee6ac2011-01-11 23:54:42 +0100777 spin_unlock_bh(&nf_conntrack_lock);
Patrick McHardyd205dc42006-08-17 18:12:38 -0700778 if (last)
779 nf_ct_put(last);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800780
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800781 return skb->len;
782}
783
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800784static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700785ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800786{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700787 struct nlattr *tb[CTA_IP_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800788 struct nf_conntrack_l3proto *l3proto;
789 int ret = 0;
790
Patrick McHardydf6fb862007-09-28 14:37:03 -0700791 nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800792
Florian Westphalcd915662009-03-18 17:28:37 +0100793 rcu_read_lock();
794 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800795
Patrick McHardyf73e9242007-09-28 14:39:55 -0700796 if (likely(l3proto->nlattr_to_tuple)) {
797 ret = nla_validate_nested(attr, CTA_IP_MAX,
798 l3proto->nla_policy);
799 if (ret == 0)
800 ret = l3proto->nlattr_to_tuple(tb, tuple);
801 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800802
Florian Westphalcd915662009-03-18 17:28:37 +0100803 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800804
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800805 return ret;
806}
807
Patrick McHardyf73e9242007-09-28 14:39:55 -0700808static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
809 [CTA_PROTO_NUM] = { .type = NLA_U8 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800810};
811
812static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700813ctnetlink_parse_tuple_proto(struct nlattr *attr,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800814 struct nf_conntrack_tuple *tuple)
815{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700816 struct nlattr *tb[CTA_PROTO_MAX+1];
Martin Josefsson605dcad2006-11-29 02:35:06 +0100817 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800818 int ret = 0;
819
Patrick McHardyf73e9242007-09-28 14:39:55 -0700820 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
821 if (ret < 0)
822 return ret;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800823
Patrick McHardydf6fb862007-09-28 14:37:03 -0700824 if (!tb[CTA_PROTO_NUM])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800825 return -EINVAL;
Patrick McHardy77236b62007-12-17 22:29:45 -0800826 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800827
Florian Westphalcd915662009-03-18 17:28:37 +0100828 rcu_read_lock();
829 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800830
Patrick McHardyf73e9242007-09-28 14:39:55 -0700831 if (likely(l4proto->nlattr_to_tuple)) {
832 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
833 l4proto->nla_policy);
834 if (ret == 0)
835 ret = l4proto->nlattr_to_tuple(tb, tuple);
836 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800837
Florian Westphalcd915662009-03-18 17:28:37 +0100838 rcu_read_unlock();
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800839
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800840 return ret;
841}
842
Patrick McHardyd0b02682010-02-10 15:38:33 +0100843static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
844 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
845 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
846};
847
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800848static int
Patrick McHardy39938322009-08-25 16:07:58 +0200849ctnetlink_parse_tuple(const struct nlattr * const cda[],
850 struct nf_conntrack_tuple *tuple,
Patrick McHardya00f1f32011-02-01 17:26:37 +0100851 enum ctattr_type type, u_int8_t l3num)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800852{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700853 struct nlattr *tb[CTA_TUPLE_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800854 int err;
855
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800856 memset(tuple, 0, sizeof(*tuple));
857
Patrick McHardyd0b02682010-02-10 15:38:33 +0100858 nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800859
Patrick McHardydf6fb862007-09-28 14:37:03 -0700860 if (!tb[CTA_TUPLE_IP])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800861 return -EINVAL;
862
863 tuple->src.l3num = l3num;
864
Patrick McHardydf6fb862007-09-28 14:37:03 -0700865 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800866 if (err < 0)
867 return err;
868
Patrick McHardydf6fb862007-09-28 14:37:03 -0700869 if (!tb[CTA_TUPLE_PROTO])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800870 return -EINVAL;
871
Patrick McHardydf6fb862007-09-28 14:37:03 -0700872 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800873 if (err < 0)
874 return err;
875
876 /* orig and expect tuples get DIR_ORIGINAL */
877 if (type == CTA_TUPLE_REPLY)
878 tuple->dst.dir = IP_CT_DIR_REPLY;
879 else
880 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
881
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800882 return 0;
883}
884
Patrick McHardyef00f892010-02-15 18:14:57 +0100885static int
886ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone)
887{
888 if (attr)
889#ifdef CONFIG_NF_CONNTRACK_ZONES
890 *zone = ntohs(nla_get_be16(attr));
891#else
892 return -EOPNOTSUPP;
893#endif
894 else
895 *zone = 0;
896
897 return 0;
898}
899
Patrick McHardyd0b02682010-02-10 15:38:33 +0100900static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
901 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING },
902};
903
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800904static inline int
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +0200905ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
906 struct nlattr **helpinfo)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800907{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700908 struct nlattr *tb[CTA_HELP_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800909
Patrick McHardyd0b02682010-02-10 15:38:33 +0100910 nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800911
Patrick McHardydf6fb862007-09-28 14:37:03 -0700912 if (!tb[CTA_HELP_NAME])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800913 return -EINVAL;
914
Patrick McHardydf6fb862007-09-28 14:37:03 -0700915 *helper_name = nla_data(tb[CTA_HELP_NAME]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800916
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +0200917 if (tb[CTA_HELP_INFO])
918 *helpinfo = tb[CTA_HELP_INFO];
919
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800920 return 0;
921}
922
Patrick McHardyf73e9242007-09-28 14:39:55 -0700923static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
Patrick McHardyd0b02682010-02-10 15:38:33 +0100924 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
925 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -0700926 [CTA_STATUS] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +0100927 [CTA_PROTOINFO] = { .type = NLA_NESTED },
928 [CTA_HELP] = { .type = NLA_NESTED },
929 [CTA_NAT_SRC] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -0700930 [CTA_TIMEOUT] = { .type = NLA_U32 },
931 [CTA_MARK] = { .type = NLA_U32 },
Patrick McHardyf73e9242007-09-28 14:39:55 -0700932 [CTA_ID] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +0100933 [CTA_NAT_DST] = { .type = NLA_NESTED },
934 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
Patrick McHardyef00f892010-02-15 18:14:57 +0100935 [CTA_ZONE] = { .type = NLA_U16 },
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000936 [CTA_MARK_MASK] = { .type = NLA_U32 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800937};
938
939static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800940ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +0200941 const struct nlmsghdr *nlh,
942 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800943{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100944 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800945 struct nf_conntrack_tuple_hash *h;
946 struct nf_conntrack_tuple tuple;
947 struct nf_conn *ct;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200948 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800949 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +0100950 u16 zone;
951 int err;
952
953 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
954 if (err < 0)
955 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800956
Patrick McHardydf6fb862007-09-28 14:37:03 -0700957 if (cda[CTA_TUPLE_ORIG])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800958 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
Patrick McHardydf6fb862007-09-28 14:37:03 -0700959 else if (cda[CTA_TUPLE_REPLY])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800960 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
961 else {
962 /* Flush the whole table */
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100963 nf_conntrack_flush_report(net,
Pablo Neira Ayuso274d3832009-06-02 20:08:38 +0200964 NETLINK_CB(skb).pid,
965 nlmsg_report(nlh));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800966 return 0;
967 }
968
969 if (err < 0)
970 return err;
971
Patrick McHardyef00f892010-02-15 18:14:57 +0100972 h = nf_conntrack_find_get(net, zone, &tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -0700973 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800974 return -ENOENT;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800975
976 ct = nf_ct_tuplehash_to_ctrack(h);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800977
Patrick McHardydf6fb862007-09-28 14:37:03 -0700978 if (cda[CTA_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -0800979 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
Patrick McHardy7f85f912007-09-28 14:41:27 -0700980 if (id != (u32)(unsigned long)ct) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800981 nf_ct_put(ct);
982 return -ENOENT;
983 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800984 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800985
Pablo Neira Ayusoa16a1642012-03-16 02:00:34 +0000986 if (del_timer(&ct->timeout)) {
987 if (nf_conntrack_event_report(IPCT_DESTROY, ct,
988 NETLINK_CB(skb).pid,
989 nlmsg_report(nlh)) < 0) {
990 nf_ct_delete_from_lists(ct);
991 /* we failed to report the event, try later */
992 nf_ct_insert_dying_list(ct);
993 nf_ct_put(ct);
994 return 0;
995 }
996 /* death_by_timeout would report the event again */
997 set_bit(IPS_DYING_BIT, &ct->status);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200998 nf_ct_delete_from_lists(ct);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200999 nf_ct_put(ct);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +02001000 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001001 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001002
1003 return 0;
1004}
1005
1006static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001007ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02001008 const struct nlmsghdr *nlh,
1009 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001010{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001011 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001012 struct nf_conntrack_tuple_hash *h;
1013 struct nf_conntrack_tuple tuple;
1014 struct nf_conn *ct;
1015 struct sk_buff *skb2 = NULL;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001016 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001017 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01001018 u16 zone;
1019 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001020
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001021 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1022 struct netlink_dump_control c = {
1023 .dump = ctnetlink_dump_table,
1024 .done = ctnetlink_done,
1025 };
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +00001026#ifdef CONFIG_NF_CONNTRACK_MARK
1027 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1028 struct ctnetlink_dump_filter *filter;
1029
1030 filter = kzalloc(sizeof(struct ctnetlink_dump_filter),
1031 GFP_ATOMIC);
1032 if (filter == NULL)
1033 return -ENOMEM;
1034
1035 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
1036 filter->mark.mask =
1037 ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
1038 c.data = filter;
1039 }
1040#endif
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001041 return netlink_dump_start(ctnl, skb, nlh, &c);
1042 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001043
Patrick McHardyef00f892010-02-15 18:14:57 +01001044 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1045 if (err < 0)
1046 return err;
1047
Patrick McHardydf6fb862007-09-28 14:37:03 -07001048 if (cda[CTA_TUPLE_ORIG])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001049 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001050 else if (cda[CTA_TUPLE_REPLY])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001051 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1052 else
1053 return -EINVAL;
1054
1055 if (err < 0)
1056 return err;
1057
Patrick McHardyef00f892010-02-15 18:14:57 +01001058 h = nf_conntrack_find_get(net, zone, &tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -07001059 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001060 return -ENOENT;
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -07001061
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001062 ct = nf_ct_tuplehash_to_ctrack(h);
1063
1064 err = -ENOMEM;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001065 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1066 if (skb2 == NULL) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001067 nf_ct_put(ct);
1068 return -ENOMEM;
1069 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001070
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001071 rcu_read_lock();
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001072 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +01001073 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001074 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001075 nf_ct_put(ct);
1076 if (err <= 0)
1077 goto free;
1078
1079 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1080 if (err < 0)
1081 goto out;
1082
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001083 return 0;
1084
1085free:
1086 kfree_skb(skb2);
1087out:
Pablo Neira Ayusof31e8d492011-01-13 14:19:55 +01001088 /* this avoids a loop in nfnetlink. */
1089 return err == -EAGAIN ? -ENOBUFS : err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001090}
1091
Pablo Neira Ayuso67671842008-10-20 03:34:27 -07001092#ifdef CONFIG_NF_NAT_NEEDED
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -08001093static int
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001094ctnetlink_parse_nat_setup(struct nf_conn *ct,
1095 enum nf_nat_manip_type manip,
Patrick McHardy39938322009-08-25 16:07:58 +02001096 const struct nlattr *attr)
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001097{
1098 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
Patrick McHardyc7232c92012-08-26 19:14:06 +02001099 int err;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001100
1101 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1102 if (!parse_nat_setup) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07001103#ifdef CONFIG_MODULES
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001104 rcu_read_unlock();
1105 nfnl_unlock();
Patrick McHardyc7232c92012-08-26 19:14:06 +02001106 if (request_module("nf-nat") < 0) {
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001107 nfnl_lock();
1108 rcu_read_lock();
1109 return -EOPNOTSUPP;
1110 }
1111 nfnl_lock();
1112 rcu_read_lock();
1113 if (nfnetlink_parse_nat_setup_hook)
1114 return -EAGAIN;
1115#endif
1116 return -EOPNOTSUPP;
1117 }
1118
Patrick McHardyc7232c92012-08-26 19:14:06 +02001119 err = parse_nat_setup(ct, manip, attr);
1120 if (err == -EAGAIN) {
1121#ifdef CONFIG_MODULES
1122 rcu_read_unlock();
1123 spin_unlock_bh(&nf_conntrack_lock);
1124 nfnl_unlock();
1125 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
1126 nfnl_lock();
1127 spin_lock_bh(&nf_conntrack_lock);
1128 rcu_read_lock();
1129 return -EOPNOTSUPP;
1130 }
1131 nfnl_lock();
1132 spin_lock_bh(&nf_conntrack_lock);
1133 rcu_read_lock();
1134#else
1135 err = -EOPNOTSUPP;
1136#endif
1137 }
1138 return err;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001139}
Pablo Neira Ayuso67671842008-10-20 03:34:27 -07001140#endif
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001141
1142static int
Patrick McHardy39938322009-08-25 16:07:58 +02001143ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001144{
1145 unsigned long d;
Patrick McHardy77236b62007-12-17 22:29:45 -08001146 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001147 d = ct->status ^ status;
1148
1149 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1150 /* unchangeable */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001151 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001152
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001153 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1154 /* SEEN_REPLY bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001155 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001156
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001157 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1158 /* ASSURED bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001159 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001160
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001161 /* Be careful here, modifying NAT bits can screw up things,
1162 * so don't let users modify them directly if they don't pass
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -08001163 * nf_nat_range. */
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001164 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1165 return 0;
1166}
1167
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001168static int
Patrick McHardy39938322009-08-25 16:07:58 +02001169ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001170{
1171#ifdef CONFIG_NF_NAT_NEEDED
1172 int ret;
1173
1174 if (cda[CTA_NAT_DST]) {
1175 ret = ctnetlink_parse_nat_setup(ct,
Patrick McHardycbc9f2f2011-12-23 13:59:49 +01001176 NF_NAT_MANIP_DST,
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001177 cda[CTA_NAT_DST]);
1178 if (ret < 0)
1179 return ret;
1180 }
1181 if (cda[CTA_NAT_SRC]) {
1182 ret = ctnetlink_parse_nat_setup(ct,
Patrick McHardycbc9f2f2011-12-23 13:59:49 +01001183 NF_NAT_MANIP_SRC,
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001184 cda[CTA_NAT_SRC]);
1185 if (ret < 0)
1186 return ret;
1187 }
1188 return 0;
1189#else
1190 return -EOPNOTSUPP;
1191#endif
1192}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001193
1194static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001195ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001196{
1197 struct nf_conntrack_helper *helper;
Harald Weltedc808fe2006-03-20 17:56:32 -08001198 struct nf_conn_help *help = nfct_help(ct);
Pablo Neira Ayuso29fe1b42009-04-22 02:26:37 -07001199 char *helpname = NULL;
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001200 struct nlattr *helpinfo = NULL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001201 int err;
1202
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001203 /* don't change helper of sibling connections */
1204 if (ct->master)
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001205 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001206
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001207 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001208 if (err < 0)
1209 return err;
1210
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001211 if (!strcmp(helpname, "")) {
1212 if (help && help->helper) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001213 /* we had a helper before ... */
1214 nf_ct_remove_expectations(ct);
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001215 RCU_INIT_POINTER(help->helper, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001216 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001217
1218 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001219 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001220
Patrick McHardy794e6872010-02-03 13:41:29 +01001221 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1222 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001223 if (helper == NULL) {
1224#ifdef CONFIG_MODULES
1225 spin_unlock_bh(&nf_conntrack_lock);
1226
1227 if (request_module("nfct-helper-%s", helpname) < 0) {
1228 spin_lock_bh(&nf_conntrack_lock);
1229 return -EOPNOTSUPP;
1230 }
1231
1232 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy794e6872010-02-03 13:41:29 +01001233 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1234 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001235 if (helper)
1236 return -EAGAIN;
1237#endif
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001238 return -EOPNOTSUPP;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001239 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001240
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001241 if (help) {
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001242 if (help->helper == helper) {
1243 /* update private helper data if allowed. */
1244 if (helper->from_nlattr && helpinfo)
1245 helper->from_nlattr(helpinfo, ct);
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001246 return 0;
Pablo Neira Ayusofd7462d2012-06-18 17:29:53 +02001247 } else
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001248 return -EBUSY;
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001249 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001250
Pablo Neira Ayusofd7462d2012-06-18 17:29:53 +02001251 /* we cannot set a helper for an existing conntrack */
1252 return -EOPNOTSUPP;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001253}
1254
1255static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001256ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001257{
Patrick McHardy77236b62007-12-17 22:29:45 -08001258 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001259
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001260 if (!del_timer(&ct->timeout))
1261 return -ETIME;
1262
1263 ct->timeout.expires = jiffies + timeout * HZ;
1264 add_timer(&ct->timeout);
1265
1266 return 0;
1267}
1268
Patrick McHardyd0b02682010-02-10 15:38:33 +01001269static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1270 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1271 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1272 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1273};
1274
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001275static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001276ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001277{
Patrick McHardy39938322009-08-25 16:07:58 +02001278 const struct nlattr *attr = cda[CTA_PROTOINFO];
1279 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
Martin Josefsson605dcad2006-11-29 02:35:06 +01001280 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001281 int err = 0;
1282
Patrick McHardyd0b02682010-02-10 15:38:33 +01001283 nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001284
Florian Westphalcd915662009-03-18 17:28:37 +01001285 rcu_read_lock();
1286 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
Patrick McHardyfdf70832007-09-28 14:37:41 -07001287 if (l4proto->from_nlattr)
1288 err = l4proto->from_nlattr(tb, ct);
Florian Westphalcd915662009-03-18 17:28:37 +01001289 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001290
1291 return err;
1292}
1293
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001294#ifdef CONFIG_NF_NAT_NEEDED
Patrick McHardyd0b02682010-02-10 15:38:33 +01001295static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = {
1296 [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 },
1297 [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 },
1298 [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 },
1299};
1300
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001301static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001302change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001303{
1304 struct nlattr *cda[CTA_NAT_SEQ_MAX+1];
1305
Patrick McHardyd0b02682010-02-10 15:38:33 +01001306 nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy);
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001307
1308 if (!cda[CTA_NAT_SEQ_CORRECTION_POS])
1309 return -EINVAL;
1310
1311 natseq->correction_pos =
Patrick McHardy77236b62007-12-17 22:29:45 -08001312 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001313
1314 if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE])
1315 return -EINVAL;
1316
1317 natseq->offset_before =
Patrick McHardy77236b62007-12-17 22:29:45 -08001318 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001319
1320 if (!cda[CTA_NAT_SEQ_OFFSET_AFTER])
1321 return -EINVAL;
1322
1323 natseq->offset_after =
Patrick McHardy77236b62007-12-17 22:29:45 -08001324 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001325
1326 return 0;
1327}
1328
1329static int
Patrick McHardy39938322009-08-25 16:07:58 +02001330ctnetlink_change_nat_seq_adj(struct nf_conn *ct,
1331 const struct nlattr * const cda[])
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001332{
1333 int ret = 0;
1334 struct nf_conn_nat *nat = nfct_nat(ct);
1335
1336 if (!nat)
1337 return 0;
1338
1339 if (cda[CTA_NAT_SEQ_ADJ_ORIG]) {
1340 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL],
1341 cda[CTA_NAT_SEQ_ADJ_ORIG]);
1342 if (ret < 0)
1343 return ret;
1344
1345 ct->status |= IPS_SEQ_ADJUST;
1346 }
1347
1348 if (cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1349 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY],
1350 cda[CTA_NAT_SEQ_ADJ_REPLY]);
1351 if (ret < 0)
1352 return ret;
1353
1354 ct->status |= IPS_SEQ_ADJUST;
1355 }
1356
1357 return 0;
1358}
1359#endif
1360
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001361static int
Patrick McHardy39938322009-08-25 16:07:58 +02001362ctnetlink_change_conntrack(struct nf_conn *ct,
1363 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001364{
1365 int err;
1366
Pablo Neira Ayusoe0983602009-03-16 15:27:22 +01001367 /* only allow NAT changes and master assignation for new conntracks */
1368 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1369 return -EOPNOTSUPP;
1370
Patrick McHardydf6fb862007-09-28 14:37:03 -07001371 if (cda[CTA_HELP]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001372 err = ctnetlink_change_helper(ct, cda);
1373 if (err < 0)
1374 return err;
1375 }
1376
Patrick McHardydf6fb862007-09-28 14:37:03 -07001377 if (cda[CTA_TIMEOUT]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001378 err = ctnetlink_change_timeout(ct, cda);
1379 if (err < 0)
1380 return err;
1381 }
1382
Patrick McHardydf6fb862007-09-28 14:37:03 -07001383 if (cda[CTA_STATUS]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001384 err = ctnetlink_change_status(ct, cda);
1385 if (err < 0)
1386 return err;
1387 }
1388
Patrick McHardydf6fb862007-09-28 14:37:03 -07001389 if (cda[CTA_PROTOINFO]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001390 err = ctnetlink_change_protoinfo(ct, cda);
1391 if (err < 0)
1392 return err;
1393 }
1394
Martin Josefssonbcd1e832006-04-01 02:23:21 -08001395#if defined(CONFIG_NF_CONNTRACK_MARK)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001396 if (cda[CTA_MARK])
Patrick McHardy77236b62007-12-17 22:29:45 -08001397 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001398#endif
1399
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001400#ifdef CONFIG_NF_NAT_NEEDED
1401 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1402 err = ctnetlink_change_nat_seq_adj(ct, cda);
1403 if (err < 0)
1404 return err;
1405 }
1406#endif
1407
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001408 return 0;
1409}
1410
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001411static struct nf_conn *
Patrick McHardyef00f892010-02-15 18:14:57 +01001412ctnetlink_create_conntrack(struct net *net, u16 zone,
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001413 const struct nlattr * const cda[],
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001414 struct nf_conntrack_tuple *otuple,
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001415 struct nf_conntrack_tuple *rtuple,
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001416 u8 u3)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001417{
1418 struct nf_conn *ct;
1419 int err = -EINVAL;
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001420 struct nf_conntrack_helper *helper;
Pablo Neira Ayuso315c34d2011-04-21 10:55:07 +02001421 struct nf_conn_tstamp *tstamp;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001422
Patrick McHardyef00f892010-02-15 18:14:57 +01001423 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
Julia Lawallcd7fcbf2009-01-12 00:06:08 +00001424 if (IS_ERR(ct))
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001425 return ERR_PTR(-ENOMEM);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001426
Patrick McHardydf6fb862007-09-28 14:37:03 -07001427 if (!cda[CTA_TIMEOUT])
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001428 goto err1;
Patrick McHardy77236b62007-12-17 22:29:45 -08001429 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001430
1431 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001432
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001433 rcu_read_lock();
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001434 if (cda[CTA_HELP]) {
Pablo Neira Ayuso29fe1b42009-04-22 02:26:37 -07001435 char *helpname = NULL;
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001436 struct nlattr *helpinfo = NULL;
1437
1438 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001439 if (err < 0)
1440 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001441
Patrick McHardy794e6872010-02-03 13:41:29 +01001442 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1443 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001444 if (helper == NULL) {
1445 rcu_read_unlock();
1446#ifdef CONFIG_MODULES
1447 if (request_module("nfct-helper-%s", helpname) < 0) {
1448 err = -EOPNOTSUPP;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001449 goto err1;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001450 }
1451
1452 rcu_read_lock();
Patrick McHardy794e6872010-02-03 13:41:29 +01001453 helper = __nf_conntrack_helper_find(helpname,
1454 nf_ct_l3num(ct),
1455 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001456 if (helper) {
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001457 err = -EAGAIN;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001458 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001459 }
1460 rcu_read_unlock();
1461#endif
1462 err = -EOPNOTSUPP;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001463 goto err1;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001464 } else {
1465 struct nf_conn_help *help;
1466
Pablo Neira Ayuso1afc5672012-06-07 12:11:50 +02001467 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001468 if (help == NULL) {
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001469 err = -ENOMEM;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001470 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001471 }
Pablo Neira Ayusoae243be2012-06-07 14:19:42 +02001472 /* set private helper data if allowed. */
1473 if (helper->from_nlattr && helpinfo)
1474 helper->from_nlattr(helpinfo, ct);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001475
1476 /* not in hash table yet so not strictly necessary */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001477 RCU_INIT_POINTER(help->helper, helper);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001478 }
1479 } else {
1480 /* try an implicit helper assignation */
Patrick McHardyb2a15a62010-02-03 14:13:03 +01001481 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001482 if (err < 0)
1483 goto err2;
Patrick McHarrdy3c158f72007-06-05 12:55:27 -07001484 }
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001485
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001486 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
1487 err = ctnetlink_change_nat(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001488 if (err < 0)
1489 goto err2;
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001490 }
1491
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001492 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +01001493 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001494 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
1495 /* we must add conntrack extensions before confirmation. */
1496 ct->status |= IPS_CONFIRMED;
1497
1498 if (cda[CTA_STATUS]) {
1499 err = ctnetlink_change_status(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001500 if (err < 0)
1501 goto err2;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001502 }
1503
Pablo Neira Ayusoc969aa72009-02-09 14:33:57 -08001504#ifdef CONFIG_NF_NAT_NEEDED
1505 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1506 err = ctnetlink_change_nat_seq_adj(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001507 if (err < 0)
1508 goto err2;
Pablo Neira Ayusoc969aa72009-02-09 14:33:57 -08001509 }
1510#endif
1511
Changli Gaoe5fc9e72010-11-12 17:33:17 +01001512 memset(&ct->proto, 0, sizeof(ct->proto));
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001513 if (cda[CTA_PROTOINFO]) {
1514 err = ctnetlink_change_protoinfo(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001515 if (err < 0)
1516 goto err2;
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001517 }
1518
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001519#if defined(CONFIG_NF_CONNTRACK_MARK)
1520 if (cda[CTA_MARK])
1521 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1522#endif
1523
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001524 /* setup master conntrack: this is a confirmed expectation */
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001525 if (cda[CTA_TUPLE_MASTER]) {
1526 struct nf_conntrack_tuple master;
1527 struct nf_conntrack_tuple_hash *master_h;
1528 struct nf_conn *master_ct;
1529
1530 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
1531 if (err < 0)
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001532 goto err2;
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001533
Patrick McHardyef00f892010-02-15 18:14:57 +01001534 master_h = nf_conntrack_find_get(net, zone, &master);
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001535 if (master_h == NULL) {
1536 err = -ENOENT;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001537 goto err2;
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001538 }
1539 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001540 __set_bit(IPS_EXPECTED_BIT, &ct->status);
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001541 ct->master = master_ct;
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001542 }
Pablo Neira Ayuso315c34d2011-04-21 10:55:07 +02001543 tstamp = nf_conn_tstamp_find(ct);
1544 if (tstamp)
1545 tstamp->start = ktime_to_ns(ktime_get_real());
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001546
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001547 err = nf_conntrack_hash_check_insert(ct);
1548 if (err < 0)
1549 goto err2;
1550
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001551 rcu_read_unlock();
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001552
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001553 return ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001554
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001555err2:
1556 rcu_read_unlock();
1557err1:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001558 nf_conntrack_free(ct);
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001559 return ERR_PTR(err);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001560}
1561
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001562static int
1563ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02001564 const struct nlmsghdr *nlh,
1565 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001566{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001567 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001568 struct nf_conntrack_tuple otuple, rtuple;
1569 struct nf_conntrack_tuple_hash *h = NULL;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001570 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001571 struct nf_conn *ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001572 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01001573 u16 zone;
1574 int err;
1575
1576 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1577 if (err < 0)
1578 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001579
Patrick McHardydf6fb862007-09-28 14:37:03 -07001580 if (cda[CTA_TUPLE_ORIG]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001581 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3);
1582 if (err < 0)
1583 return err;
1584 }
1585
Patrick McHardydf6fb862007-09-28 14:37:03 -07001586 if (cda[CTA_TUPLE_REPLY]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001587 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3);
1588 if (err < 0)
1589 return err;
1590 }
1591
Patrick McHardydf6fb862007-09-28 14:37:03 -07001592 if (cda[CTA_TUPLE_ORIG])
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001593 h = nf_conntrack_find_get(net, zone, &otuple);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001594 else if (cda[CTA_TUPLE_REPLY])
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001595 h = nf_conntrack_find_get(net, zone, &rtuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001596
1597 if (h == NULL) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001598 err = -ENOENT;
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001599 if (nlh->nlmsg_flags & NLM_F_CREATE) {
Pablo Neira Ayusofecc1132009-05-05 17:48:26 +02001600 enum ip_conntrack_events events;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001601
Patrick McHardyef00f892010-02-15 18:14:57 +01001602 ct = ctnetlink_create_conntrack(net, zone, cda, &otuple,
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001603 &rtuple, u3);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001604 if (IS_ERR(ct))
1605 return PTR_ERR(ct);
1606
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001607 err = 0;
Pablo Neira Ayusofecc1132009-05-05 17:48:26 +02001608 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1609 events = IPCT_RELATED;
1610 else
1611 events = IPCT_NEW;
1612
Patrick McHardy858b31332010-02-03 13:48:53 +01001613 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1614 (1 << IPCT_ASSURED) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001615 (1 << IPCT_HELPER) |
1616 (1 << IPCT_PROTOINFO) |
1617 (1 << IPCT_NATSEQADJ) |
1618 (1 << IPCT_MARK) | events,
1619 ct, NETLINK_CB(skb).pid,
1620 nlmsg_report(nlh));
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001621 nf_ct_put(ct);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001622 }
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001623
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001624 return err;
1625 }
1626 /* implicit 'else' */
1627
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001628 err = -EEXIST;
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001629 ct = nf_ct_tuplehash_to_ctrack(h);
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001630 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001631 spin_lock_bh(&nf_conntrack_lock);
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01001632 err = ctnetlink_change_conntrack(ct, cda);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001633 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01001634 if (err == 0) {
Patrick McHardy858b31332010-02-03 13:48:53 +01001635 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1636 (1 << IPCT_ASSURED) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001637 (1 << IPCT_HELPER) |
1638 (1 << IPCT_PROTOINFO) |
1639 (1 << IPCT_NATSEQADJ) |
1640 (1 << IPCT_MARK),
1641 ct, NETLINK_CB(skb).pid,
1642 nlmsg_report(nlh));
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001643 }
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001644 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001645
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001646 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001647 return err;
1648}
1649
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02001650static int
1651ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
1652 __u16 cpu, const struct ip_conntrack_stat *st)
1653{
1654 struct nlmsghdr *nlh;
1655 struct nfgenmsg *nfmsg;
1656 unsigned int flags = pid ? NLM_F_MULTI : 0, event;
1657
1658 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU);
1659 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
1660 if (nlh == NULL)
1661 goto nlmsg_failure;
1662
1663 nfmsg = nlmsg_data(nlh);
1664 nfmsg->nfgen_family = AF_UNSPEC;
1665 nfmsg->version = NFNETLINK_V0;
1666 nfmsg->res_id = htons(cpu);
1667
1668 if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) ||
1669 nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
1670 nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) ||
1671 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
1672 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
1673 nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) ||
1674 nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) ||
1675 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
1676 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
1677 htonl(st->insert_failed)) ||
1678 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
1679 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
1680 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
1681 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
1682 htonl(st->search_restart)))
1683 goto nla_put_failure;
1684
1685 nlmsg_end(skb, nlh);
1686 return skb->len;
1687
1688nla_put_failure:
1689nlmsg_failure:
1690 nlmsg_cancel(skb, nlh);
1691 return -1;
1692}
1693
1694static int
1695ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
1696{
1697 int cpu;
1698 struct net *net = sock_net(skb->sk);
1699
1700 if (cb->args[0] == nr_cpu_ids)
1701 return 0;
1702
1703 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1704 const struct ip_conntrack_stat *st;
1705
1706 if (!cpu_possible(cpu))
1707 continue;
1708
1709 st = per_cpu_ptr(net->ct.stat, cpu);
1710 if (ctnetlink_ct_stat_cpu_fill_info(skb,
1711 NETLINK_CB(cb->skb).pid,
1712 cb->nlh->nlmsg_seq,
1713 cpu, st) < 0)
1714 break;
1715 }
1716 cb->args[0] = cpu;
1717
1718 return skb->len;
1719}
1720
1721static int
1722ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb,
1723 const struct nlmsghdr *nlh,
1724 const struct nlattr * const cda[])
1725{
1726 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1727 struct netlink_dump_control c = {
1728 .dump = ctnetlink_ct_stat_cpu_dump,
1729 };
1730 return netlink_dump_start(ctnl, skb, nlh, &c);
1731 }
1732
1733 return 0;
1734}
1735
1736static int
1737ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 pid, u32 seq, u32 type,
1738 struct net *net)
1739{
1740 struct nlmsghdr *nlh;
1741 struct nfgenmsg *nfmsg;
1742 unsigned int flags = pid ? NLM_F_MULTI : 0, event;
1743 unsigned int nr_conntracks = atomic_read(&net->ct.count);
1744
1745 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS);
1746 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
1747 if (nlh == NULL)
1748 goto nlmsg_failure;
1749
1750 nfmsg = nlmsg_data(nlh);
1751 nfmsg->nfgen_family = AF_UNSPEC;
1752 nfmsg->version = NFNETLINK_V0;
1753 nfmsg->res_id = 0;
1754
1755 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
1756 goto nla_put_failure;
1757
1758 nlmsg_end(skb, nlh);
1759 return skb->len;
1760
1761nla_put_failure:
1762nlmsg_failure:
1763 nlmsg_cancel(skb, nlh);
1764 return -1;
1765}
1766
1767static int
1768ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb,
1769 const struct nlmsghdr *nlh,
1770 const struct nlattr * const cda[])
1771{
1772 struct sk_buff *skb2;
1773 int err;
1774
1775 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1776 if (skb2 == NULL)
1777 return -ENOMEM;
1778
1779 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).pid,
1780 nlh->nlmsg_seq,
1781 NFNL_MSG_TYPE(nlh->nlmsg_type),
1782 sock_net(skb->sk));
1783 if (err <= 0)
1784 goto free;
1785
1786 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1787 if (err < 0)
1788 goto out;
1789
1790 return 0;
1791
1792free:
1793 kfree_skb(skb2);
1794out:
1795 /* this avoids a loop in nfnetlink. */
1796 return err == -EAGAIN ? -ENOBUFS : err;
1797}
1798
Pablo Neira Ayuso7c622342012-06-19 02:10:57 +02001799#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02001800static size_t
1801ctnetlink_nfqueue_build_size(const struct nf_conn *ct)
1802{
1803 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
1804 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
1805 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
1806 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
1807 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
1808 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
1809 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
1810 + nla_total_size(0) /* CTA_PROTOINFO */
1811 + nla_total_size(0) /* CTA_HELP */
1812 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
1813 + ctnetlink_secctx_size(ct)
1814#ifdef CONFIG_NF_NAT_NEEDED
1815 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
1816 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
1817#endif
1818#ifdef CONFIG_NF_CONNTRACK_MARK
1819 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
1820#endif
1821 + ctnetlink_proto_size(ct)
1822 ;
1823}
1824
1825static int
1826ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
1827{
1828 struct nlattr *nest_parms;
1829
1830 rcu_read_lock();
1831 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
1832 if (!nest_parms)
1833 goto nla_put_failure;
1834 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
1835 goto nla_put_failure;
1836 nla_nest_end(skb, nest_parms);
1837
1838 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
1839 if (!nest_parms)
1840 goto nla_put_failure;
1841 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
1842 goto nla_put_failure;
1843 nla_nest_end(skb, nest_parms);
1844
1845 if (nf_ct_zone(ct)) {
1846 if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
1847 goto nla_put_failure;
1848 }
1849
1850 if (ctnetlink_dump_id(skb, ct) < 0)
1851 goto nla_put_failure;
1852
1853 if (ctnetlink_dump_status(skb, ct) < 0)
1854 goto nla_put_failure;
1855
1856 if (ctnetlink_dump_timeout(skb, ct) < 0)
1857 goto nla_put_failure;
1858
1859 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
1860 goto nla_put_failure;
1861
1862 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
1863 goto nla_put_failure;
1864
1865#ifdef CONFIG_NF_CONNTRACK_SECMARK
1866 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
1867 goto nla_put_failure;
1868#endif
1869 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
1870 goto nla_put_failure;
1871
1872 if ((ct->status & IPS_SEQ_ADJUST) &&
1873 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
1874 goto nla_put_failure;
1875
1876#ifdef CONFIG_NF_CONNTRACK_MARK
1877 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
1878 goto nla_put_failure;
1879#endif
1880 rcu_read_unlock();
1881 return 0;
1882
1883nla_put_failure:
1884 rcu_read_unlock();
1885 return -ENOSPC;
1886}
1887
1888static int
1889ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
1890{
1891 int err;
1892
1893 if (cda[CTA_TIMEOUT]) {
1894 err = ctnetlink_change_timeout(ct, cda);
1895 if (err < 0)
1896 return err;
1897 }
1898 if (cda[CTA_STATUS]) {
1899 err = ctnetlink_change_status(ct, cda);
1900 if (err < 0)
1901 return err;
1902 }
1903 if (cda[CTA_HELP]) {
1904 err = ctnetlink_change_helper(ct, cda);
1905 if (err < 0)
1906 return err;
1907 }
1908#if defined(CONFIG_NF_CONNTRACK_MARK)
1909 if (cda[CTA_MARK])
1910 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1911#endif
1912 return 0;
1913}
1914
1915static int
1916ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct)
1917{
1918 struct nlattr *cda[CTA_MAX+1];
Pablo Neira Ayuso68e035c2012-08-14 12:47:37 +02001919 int ret;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02001920
1921 nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
1922
Pablo Neira Ayuso68e035c2012-08-14 12:47:37 +02001923 spin_lock_bh(&nf_conntrack_lock);
1924 ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct);
1925 spin_unlock_bh(&nf_conntrack_lock);
1926
1927 return ret;
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02001928}
1929
1930static struct nfq_ct_hook ctnetlink_nfqueue_hook = {
1931 .build_size = ctnetlink_nfqueue_build_size,
1932 .build = ctnetlink_nfqueue_build,
1933 .parse = ctnetlink_nfqueue_parse,
1934};
Pablo Neira Ayuso7c622342012-06-19 02:10:57 +02001935#endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02001936
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001937/***********************************************************************
1938 * EXPECT
1939 ***********************************************************************/
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001940
1941static inline int
1942ctnetlink_exp_dump_tuple(struct sk_buff *skb,
1943 const struct nf_conntrack_tuple *tuple,
1944 enum ctattr_expect type)
1945{
Patrick McHardydf6fb862007-09-28 14:37:03 -07001946 struct nlattr *nest_parms;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001947
Patrick McHardydf6fb862007-09-28 14:37:03 -07001948 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
1949 if (!nest_parms)
1950 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001951 if (ctnetlink_dump_tuples(skb, tuple) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001952 goto nla_put_failure;
1953 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001954
1955 return 0;
1956
Patrick McHardydf6fb862007-09-28 14:37:03 -07001957nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001958 return -1;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001959}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001960
1961static inline int
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001962ctnetlink_exp_dump_mask(struct sk_buff *skb,
1963 const struct nf_conntrack_tuple *tuple,
Patrick McHardyd4156e82007-07-07 22:31:32 -07001964 const struct nf_conntrack_tuple_mask *mask)
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001965{
1966 int ret;
1967 struct nf_conntrack_l3proto *l3proto;
Martin Josefsson605dcad2006-11-29 02:35:06 +01001968 struct nf_conntrack_l4proto *l4proto;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001969 struct nf_conntrack_tuple m;
Patrick McHardydf6fb862007-09-28 14:37:03 -07001970 struct nlattr *nest_parms;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001971
1972 memset(&m, 0xFF, sizeof(m));
Patrick McHardyd4156e82007-07-07 22:31:32 -07001973 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
Patrick McHardye5787562010-01-26 17:04:02 +01001974 m.src.u.all = mask->src.u.all;
1975 m.dst.protonum = tuple->dst.protonum;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001976
Patrick McHardydf6fb862007-09-28 14:37:03 -07001977 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
1978 if (!nest_parms)
1979 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001980
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00001981 rcu_read_lock();
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001982 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
Patrick McHardyd4156e82007-07-07 22:31:32 -07001983 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00001984 if (ret >= 0) {
1985 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
1986 tuple->dst.protonum);
Patrick McHardyd4156e82007-07-07 22:31:32 -07001987 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00001988 }
1989 rcu_read_unlock();
1990
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001991 if (unlikely(ret < 0))
Patrick McHardydf6fb862007-09-28 14:37:03 -07001992 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001993
Patrick McHardydf6fb862007-09-28 14:37:03 -07001994 nla_nest_end(skb, nest_parms);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001995
1996 return 0;
1997
Patrick McHardydf6fb862007-09-28 14:37:03 -07001998nla_put_failure:
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001999 return -1;
2000}
2001
Patrick McHardyc7232c92012-08-26 19:14:06 +02002002static const union nf_inet_addr any_addr;
2003
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -08002004static int
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002005ctnetlink_exp_dump_expect(struct sk_buff *skb,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002006 const struct nf_conntrack_expect *exp)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002007{
2008 struct nf_conn *master = exp->master;
Xi Wangc1216382011-12-30 10:40:17 -05002009 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002010 struct nf_conn_help *help;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002011#ifdef CONFIG_NF_NAT_NEEDED
2012 struct nlattr *nest_parms;
2013 struct nf_conntrack_tuple nat_tuple = {};
2014#endif
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002015 struct nf_ct_helper_expectfn *expfn;
2016
Patrick McHardyd978e5d2007-12-17 22:37:03 -08002017 if (timeout < 0)
2018 timeout = 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002019
2020 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002021 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08002022 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002023 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002024 if (ctnetlink_exp_dump_tuple(skb,
2025 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2026 CTA_EXPECT_MASTER) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002027 goto nla_put_failure;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002028
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002029#ifdef CONFIG_NF_NAT_NEEDED
Patrick McHardyc7232c92012-08-26 19:14:06 +02002030 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2031 exp->saved_proto.all) {
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002032 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2033 if (!nest_parms)
2034 goto nla_put_failure;
2035
David S. Millercc1eb432012-04-01 18:57:48 -04002036 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2037 goto nla_put_failure;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002038
2039 nat_tuple.src.l3num = nf_ct_l3num(master);
Patrick McHardyc7232c92012-08-26 19:14:06 +02002040 nat_tuple.src.u3 = exp->saved_addr;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002041 nat_tuple.dst.protonum = nf_ct_protonum(master);
2042 nat_tuple.src.u = exp->saved_proto;
2043
2044 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2045 CTA_EXPECT_NAT_TUPLE) < 0)
2046 goto nla_put_failure;
2047 nla_nest_end(skb, nest_parms);
2048 }
2049#endif
David S. Millercc1eb432012-04-01 18:57:48 -04002050 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2051 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2052 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2053 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2054 goto nla_put_failure;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002055 help = nfct_help(master);
2056 if (help) {
2057 struct nf_conntrack_helper *helper;
2058
2059 helper = rcu_dereference(help->helper);
David S. Millercc1eb432012-04-01 18:57:48 -04002060 if (helper &&
2061 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2062 goto nla_put_failure;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002063 }
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002064 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
David S. Millercc1eb432012-04-01 18:57:48 -04002065 if (expfn != NULL &&
2066 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2067 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002068
2069 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002070
Patrick McHardydf6fb862007-09-28 14:37:03 -07002071nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002072 return -1;
2073}
2074
2075static int
2076ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002077 int event, const struct nf_conntrack_expect *exp)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002078{
2079 struct nlmsghdr *nlh;
2080 struct nfgenmsg *nfmsg;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002081 unsigned int flags = pid ? NLM_F_MULTI : 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002082
2083 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002084 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
2085 if (nlh == NULL)
2086 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002087
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002088 nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002089 nfmsg->nfgen_family = exp->tuple.src.l3num;
2090 nfmsg->version = NFNETLINK_V0;
2091 nfmsg->res_id = 0;
2092
2093 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002094 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002095
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002096 nlmsg_end(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002097 return skb->len;
2098
2099nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -07002100nla_put_failure:
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002101 nlmsg_cancel(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002102 return -1;
2103}
2104
2105#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002106static int
2107ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002108{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002109 struct nf_conntrack_expect *exp = item->exp;
2110 struct net *net = nf_ct_exp_net(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002111 struct nlmsghdr *nlh;
2112 struct nfgenmsg *nfmsg;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002113 struct sk_buff *skb;
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002114 unsigned int type, group;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002115 int flags = 0;
2116
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002117 if (events & (1 << IPEXP_DESTROY)) {
2118 type = IPCTNL_MSG_EXP_DELETE;
2119 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2120 } else if (events & (1 << IPEXP_NEW)) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002121 type = IPCTNL_MSG_EXP_NEW;
2122 flags = NLM_F_CREATE|NLM_F_EXCL;
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002123 group = NFNLGRP_CONNTRACK_EXP_NEW;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002124 } else
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002125 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002126
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002127 if (!item->report && !nfnetlink_has_listeners(net, group))
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002128 return 0;
Pablo Neira Ayusob3a27bf2006-08-22 00:32:05 -07002129
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002130 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2131 if (skb == NULL)
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +02002132 goto errout;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002133
Marcus Sundbergb633ad52006-02-04 02:11:09 -08002134 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002135 nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags);
2136 if (nlh == NULL)
2137 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002138
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002139 nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002140 nfmsg->nfgen_family = exp->tuple.src.l3num;
2141 nfmsg->version = NFNETLINK_V0;
2142 nfmsg->res_id = 0;
2143
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002144 rcu_read_lock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002145 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07002146 goto nla_put_failure;
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002147 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002148
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002149 nlmsg_end(skb, nlh);
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002150 nfnetlink_send(skb, net, item->pid, group, item->report, GFP_ATOMIC);
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002151 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002152
Patrick McHardydf6fb862007-09-28 14:37:03 -07002153nla_put_failure:
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002154 rcu_read_unlock();
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002155 nlmsg_cancel(skb, nlh);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002156nlmsg_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002157 kfree_skb(skb);
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +02002158errout:
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002159 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002160 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002161}
2162#endif
Patrick McHardycf6994c2007-07-07 22:32:34 -07002163static int ctnetlink_exp_done(struct netlink_callback *cb)
2164{
Patrick McHardy31f15872007-07-07 22:35:21 -07002165 if (cb->args[1])
2166 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
Patrick McHardycf6994c2007-07-07 22:32:34 -07002167 return 0;
2168}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002169
2170static int
2171ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2172{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002173 struct net *net = sock_net(skb->sk);
Patrick McHardycf6994c2007-07-07 22:32:34 -07002174 struct nf_conntrack_expect *exp, *last;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002175 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
Patrick McHardy31f15872007-07-07 22:35:21 -07002176 struct hlist_node *n;
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -08002177 u_int8_t l3proto = nfmsg->nfgen_family;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002178
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002179 rcu_read_lock();
Patrick McHardy31f15872007-07-07 22:35:21 -07002180 last = (struct nf_conntrack_expect *)cb->args[1];
2181 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
Patrick McHardycf6994c2007-07-07 22:32:34 -07002182restart:
Alexey Dobriyan9b03f382008-10-08 11:35:03 +02002183 hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]],
Patrick McHardy31f15872007-07-07 22:35:21 -07002184 hnode) {
2185 if (l3proto && exp->tuple.src.l3num != l3proto)
Patrick McHardycf6994c2007-07-07 22:32:34 -07002186 continue;
Patrick McHardy31f15872007-07-07 22:35:21 -07002187 if (cb->args[1]) {
2188 if (exp != last)
2189 continue;
2190 cb->args[1] = 0;
2191 }
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002192 if (ctnetlink_exp_fill_info(skb,
2193 NETLINK_CB(cb->skb).pid,
Patrick McHardy31f15872007-07-07 22:35:21 -07002194 cb->nlh->nlmsg_seq,
2195 IPCTNL_MSG_EXP_NEW,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002196 exp) < 0) {
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002197 if (!atomic_inc_not_zero(&exp->use))
2198 continue;
Patrick McHardy31f15872007-07-07 22:35:21 -07002199 cb->args[1] = (unsigned long)exp;
2200 goto out;
2201 }
Patrick McHardycf6994c2007-07-07 22:32:34 -07002202 }
Patrick McHardy31f15872007-07-07 22:35:21 -07002203 if (cb->args[1]) {
2204 cb->args[1] = 0;
2205 goto restart;
Patrick McHardycf6994c2007-07-07 22:32:34 -07002206 }
2207 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002208out:
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002209 rcu_read_unlock();
Patrick McHardycf6994c2007-07-07 22:32:34 -07002210 if (last)
2211 nf_ct_expect_put(last);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002212
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002213 return skb->len;
2214}
2215
Patrick McHardyf73e9242007-09-28 14:39:55 -07002216static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
Patrick McHardyd0b02682010-02-10 15:38:33 +01002217 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2218 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2219 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -07002220 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2221 [CTA_EXPECT_ID] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +01002222 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING },
Pablo Neira Ayusobcac0df2010-09-22 08:35:36 +02002223 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
Pablo Neira Ayuso8b008fa2010-09-22 08:36:59 +02002224 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002225 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002226 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002227 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002228};
2229
2230static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002231ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02002232 const struct nlmsghdr *nlh,
2233 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002234{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002235 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002236 struct nf_conntrack_tuple tuple;
2237 struct nf_conntrack_expect *exp;
2238 struct sk_buff *skb2;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002239 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002240 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01002241 u16 zone;
2242 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002243
David S. Millerb8f3ab42011-01-18 12:40:38 -08002244 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00002245 struct netlink_dump_control c = {
2246 .dump = ctnetlink_exp_dump_table,
2247 .done = ctnetlink_exp_done,
2248 };
2249 return netlink_dump_start(ctnl, skb, nlh, &c);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002250 }
2251
Patrick McHardyef00f892010-02-15 18:14:57 +01002252 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2253 if (err < 0)
2254 return err;
2255
Pablo Neira Ayuso35dba1d2011-12-14 12:45:22 +01002256 if (cda[CTA_EXPECT_TUPLE])
2257 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2258 else if (cda[CTA_EXPECT_MASTER])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002259 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2260 else
2261 return -EINVAL;
2262
2263 if (err < 0)
2264 return err;
2265
Patrick McHardyef00f892010-02-15 18:14:57 +01002266 exp = nf_ct_expect_find_get(net, zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002267 if (!exp)
2268 return -ENOENT;
2269
Patrick McHardydf6fb862007-09-28 14:37:03 -07002270 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08002271 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07002272 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07002273 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002274 return -ENOENT;
2275 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002276 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002277
2278 err = -ENOMEM;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002279 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002280 if (skb2 == NULL) {
2281 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002282 goto out;
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002283 }
Thomas Graf4e9b8262006-11-27 09:25:58 -08002284
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002285 rcu_read_lock();
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002286 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002287 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002288 rcu_read_unlock();
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002289 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002290 if (err <= 0)
2291 goto free;
2292
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002293 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
2294 if (err < 0)
2295 goto out;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002296
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002297 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002298
2299free:
2300 kfree_skb(skb2);
2301out:
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002302 /* this avoids a loop in nfnetlink. */
2303 return err == -EAGAIN ? -ENOBUFS : err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002304}
2305
2306static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002307ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02002308 const struct nlmsghdr *nlh,
2309 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002310{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002311 struct net *net = sock_net(ctnl);
Patrick McHardy31f15872007-07-07 22:35:21 -07002312 struct nf_conntrack_expect *exp;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002313 struct nf_conntrack_tuple tuple;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002314 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Patrick McHardy31f15872007-07-07 22:35:21 -07002315 struct hlist_node *n, *next;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002316 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardy31f15872007-07-07 22:35:21 -07002317 unsigned int i;
Patrick McHardyef00f892010-02-15 18:14:57 +01002318 u16 zone;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002319 int err;
2320
Patrick McHardydf6fb862007-09-28 14:37:03 -07002321 if (cda[CTA_EXPECT_TUPLE]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002322 /* delete a single expect by tuple */
Patrick McHardyef00f892010-02-15 18:14:57 +01002323 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2324 if (err < 0)
2325 return err;
2326
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002327 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2328 if (err < 0)
2329 return err;
2330
2331 /* bump usage count to 2 */
Patrick McHardyef00f892010-02-15 18:14:57 +01002332 exp = nf_ct_expect_find_get(net, zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002333 if (!exp)
2334 return -ENOENT;
2335
Patrick McHardydf6fb862007-09-28 14:37:03 -07002336 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08002337 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07002338 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07002339 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002340 return -ENOENT;
2341 }
2342 }
2343
2344 /* after list removal, usage count == 1 */
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002345 spin_lock_bh(&nf_conntrack_lock);
2346 if (del_timer(&exp->timeout)) {
2347 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).pid,
2348 nlmsg_report(nlh));
2349 nf_ct_expect_put(exp);
2350 }
2351 spin_unlock_bh(&nf_conntrack_lock);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002352 /* have to put what we 'get' above.
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002353 * after this line usage count == 0 */
Patrick McHardy68236452007-07-07 22:30:49 -07002354 nf_ct_expect_put(exp);
Patrick McHardydf6fb862007-09-28 14:37:03 -07002355 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2356 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
Patrick McHardy31f15872007-07-07 22:35:21 -07002357 struct nf_conn_help *m_help;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002358
2359 /* delete all expectations for this helper */
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002360 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy31f15872007-07-07 22:35:21 -07002361 for (i = 0; i < nf_ct_expect_hsize; i++) {
2362 hlist_for_each_entry_safe(exp, n, next,
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002363 &net->ct.expect_hash[i],
Patrick McHardy31f15872007-07-07 22:35:21 -07002364 hnode) {
2365 m_help = nfct_help(exp->master);
Patrick McHardy794e6872010-02-03 13:41:29 +01002366 if (!strcmp(m_help->helper->name, name) &&
2367 del_timer(&exp->timeout)) {
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002368 nf_ct_unlink_expect_report(exp,
2369 NETLINK_CB(skb).pid,
2370 nlmsg_report(nlh));
Patrick McHardy31f15872007-07-07 22:35:21 -07002371 nf_ct_expect_put(exp);
2372 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002373 }
2374 }
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002375 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002376 } else {
2377 /* This basically means we have to flush everything*/
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002378 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy31f15872007-07-07 22:35:21 -07002379 for (i = 0; i < nf_ct_expect_hsize; i++) {
2380 hlist_for_each_entry_safe(exp, n, next,
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002381 &net->ct.expect_hash[i],
Patrick McHardy31f15872007-07-07 22:35:21 -07002382 hnode) {
2383 if (del_timer(&exp->timeout)) {
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002384 nf_ct_unlink_expect_report(exp,
2385 NETLINK_CB(skb).pid,
2386 nlmsg_report(nlh));
Patrick McHardy31f15872007-07-07 22:35:21 -07002387 nf_ct_expect_put(exp);
2388 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002389 }
2390 }
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002391 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002392 }
2393
2394 return 0;
2395}
2396static int
Patrick McHardy39938322009-08-25 16:07:58 +02002397ctnetlink_change_expect(struct nf_conntrack_expect *x,
2398 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002399{
Kelvie Wong9768e1a2012-05-02 14:39:24 +00002400 if (cda[CTA_EXPECT_TIMEOUT]) {
2401 if (!del_timer(&x->timeout))
2402 return -ETIME;
2403
2404 x->timeout.expires = jiffies +
2405 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2406 add_timer(&x->timeout);
2407 }
2408 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002409}
2410
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002411static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2412 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2413 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2414};
2415
2416static int
2417ctnetlink_parse_expect_nat(const struct nlattr *attr,
2418 struct nf_conntrack_expect *exp,
2419 u_int8_t u3)
2420{
2421#ifdef CONFIG_NF_NAT_NEEDED
2422 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2423 struct nf_conntrack_tuple nat_tuple = {};
2424 int err;
2425
2426 nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2427
2428 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2429 return -EINVAL;
2430
2431 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2432 &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3);
2433 if (err < 0)
2434 return err;
2435
Patrick McHardyc7232c92012-08-26 19:14:06 +02002436 exp->saved_addr = nat_tuple.src.u3;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002437 exp->saved_proto = nat_tuple.src.u;
2438 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2439
2440 return 0;
2441#else
2442 return -EOPNOTSUPP;
2443#endif
2444}
2445
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002446static int
Patrick McHardyef00f892010-02-15 18:14:57 +01002447ctnetlink_create_expect(struct net *net, u16 zone,
2448 const struct nlattr * const cda[],
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002449 u_int8_t u3,
Patrick McHardy39938322009-08-25 16:07:58 +02002450 u32 pid, int report)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002451{
2452 struct nf_conntrack_tuple tuple, mask, master_tuple;
2453 struct nf_conntrack_tuple_hash *h = NULL;
2454 struct nf_conntrack_expect *exp;
2455 struct nf_conn *ct;
Harald Weltedc808fe2006-03-20 17:56:32 -08002456 struct nf_conn_help *help;
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01002457 struct nf_conntrack_helper *helper = NULL;
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002458 u_int32_t class = 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002459 int err = 0;
2460
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002461 /* caller guarantees that those three CTA_EXPECT_* exist */
2462 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2463 if (err < 0)
2464 return err;
2465 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
2466 if (err < 0)
2467 return err;
2468 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
2469 if (err < 0)
2470 return err;
2471
2472 /* Look for master conntrack of this expectation */
Patrick McHardyef00f892010-02-15 18:14:57 +01002473 h = nf_conntrack_find_get(net, zone, &master_tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002474 if (!h)
2475 return -ENOENT;
2476 ct = nf_ct_tuplehash_to_ctrack(h);
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01002477
2478 /* Look for helper of this expectation */
2479 if (cda[CTA_EXPECT_HELP_NAME]) {
2480 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2481
2482 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2483 nf_ct_protonum(ct));
2484 if (helper == NULL) {
2485#ifdef CONFIG_MODULES
2486 if (request_module("nfct-helper-%s", helpname) < 0) {
2487 err = -EOPNOTSUPP;
2488 goto out;
2489 }
2490
2491 helper = __nf_conntrack_helper_find(helpname,
2492 nf_ct_l3num(ct),
2493 nf_ct_protonum(ct));
2494 if (helper) {
2495 err = -EAGAIN;
2496 goto out;
2497 }
2498#endif
2499 err = -EOPNOTSUPP;
2500 goto out;
2501 }
2502 }
2503
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002504 if (cda[CTA_EXPECT_CLASS] && helper) {
2505 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
2506 if (class > helper->expect_class_max) {
2507 err = -EINVAL;
2508 goto out;
2509 }
2510 }
Patrick McHardy68236452007-07-07 22:30:49 -07002511 exp = nf_ct_expect_alloc(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002512 if (!exp) {
2513 err = -ENOMEM;
2514 goto out;
2515 }
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002516 help = nfct_help(ct);
2517 if (!help) {
2518 if (!cda[CTA_EXPECT_TIMEOUT]) {
2519 err = -EINVAL;
2520 goto out;
2521 }
2522 exp->timeout.expires =
2523 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002524
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002525 exp->flags = NF_CT_EXPECT_USERSPACE;
2526 if (cda[CTA_EXPECT_FLAGS]) {
2527 exp->flags |=
2528 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2529 }
2530 } else {
2531 if (cda[CTA_EXPECT_FLAGS]) {
2532 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2533 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
2534 } else
2535 exp->flags = 0;
2536 }
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002537 if (cda[CTA_EXPECT_FN]) {
2538 const char *name = nla_data(cda[CTA_EXPECT_FN]);
2539 struct nf_ct_helper_expectfn *expfn;
2540
2541 expfn = nf_ct_helper_expectfn_find_by_name(name);
2542 if (expfn == NULL) {
2543 err = -EINVAL;
2544 goto err_out;
2545 }
2546 exp->expectfn = expfn->expectfn;
2547 } else
2548 exp->expectfn = NULL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002549
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002550 exp->class = class;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002551 exp->master = ct;
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01002552 exp->helper = helper;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002553 memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
Patrick McHardyd4156e82007-07-07 22:31:32 -07002554 memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
2555 exp->mask.src.u.all = mask.src.u.all;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002556
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002557 if (cda[CTA_EXPECT_NAT]) {
2558 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
2559 exp, u3);
2560 if (err < 0)
2561 goto err_out;
2562 }
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01002563 err = nf_ct_expect_related_report(exp, pid, report);
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002564err_out:
Patrick McHardy68236452007-07-07 22:30:49 -07002565 nf_ct_expect_put(exp);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002566out:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002567 nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
2568 return err;
2569}
2570
2571static int
2572ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02002573 const struct nlmsghdr *nlh,
2574 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002575{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002576 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002577 struct nf_conntrack_tuple tuple;
2578 struct nf_conntrack_expect *exp;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002579 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002580 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01002581 u16 zone;
2582 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002583
Patrick McHardydf6fb862007-09-28 14:37:03 -07002584 if (!cda[CTA_EXPECT_TUPLE]
2585 || !cda[CTA_EXPECT_MASK]
2586 || !cda[CTA_EXPECT_MASTER])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002587 return -EINVAL;
2588
Patrick McHardyef00f892010-02-15 18:14:57 +01002589 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2590 if (err < 0)
2591 return err;
2592
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002593 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2594 if (err < 0)
2595 return err;
2596
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002597 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardyef00f892010-02-15 18:14:57 +01002598 exp = __nf_ct_expect_find(net, zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002599
2600 if (!exp) {
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002601 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002602 err = -ENOENT;
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01002603 if (nlh->nlmsg_flags & NLM_F_CREATE) {
Patrick McHardyef00f892010-02-15 18:14:57 +01002604 err = ctnetlink_create_expect(net, zone, cda,
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01002605 u3,
2606 NETLINK_CB(skb).pid,
2607 nlmsg_report(nlh));
2608 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002609 return err;
2610 }
2611
2612 err = -EEXIST;
2613 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
2614 err = ctnetlink_change_expect(exp, cda);
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002615 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002616
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002617 return err;
2618}
2619
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002620static int
2621ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int cpu,
2622 const struct ip_conntrack_stat *st)
2623{
2624 struct nlmsghdr *nlh;
2625 struct nfgenmsg *nfmsg;
2626 unsigned int flags = pid ? NLM_F_MULTI : 0, event;
2627
2628 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU);
2629 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
2630 if (nlh == NULL)
2631 goto nlmsg_failure;
2632
2633 nfmsg = nlmsg_data(nlh);
2634 nfmsg->nfgen_family = AF_UNSPEC;
2635 nfmsg->version = NFNETLINK_V0;
2636 nfmsg->res_id = htons(cpu);
2637
2638 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
2639 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
2640 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
2641 goto nla_put_failure;
2642
2643 nlmsg_end(skb, nlh);
2644 return skb->len;
2645
2646nla_put_failure:
2647nlmsg_failure:
2648 nlmsg_cancel(skb, nlh);
2649 return -1;
2650}
2651
2652static int
2653ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2654{
2655 int cpu;
2656 struct net *net = sock_net(skb->sk);
2657
2658 if (cb->args[0] == nr_cpu_ids)
2659 return 0;
2660
2661 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2662 const struct ip_conntrack_stat *st;
2663
2664 if (!cpu_possible(cpu))
2665 continue;
2666
2667 st = per_cpu_ptr(net->ct.stat, cpu);
2668 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).pid,
2669 cb->nlh->nlmsg_seq,
2670 cpu, st) < 0)
2671 break;
2672 }
2673 cb->args[0] = cpu;
2674
2675 return skb->len;
2676}
2677
2678static int
2679ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb,
2680 const struct nlmsghdr *nlh,
2681 const struct nlattr * const cda[])
2682{
2683 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2684 struct netlink_dump_control c = {
2685 .dump = ctnetlink_exp_stat_cpu_dump,
2686 };
2687 return netlink_dump_start(ctnl, skb, nlh, &c);
2688 }
2689
2690 return 0;
2691}
2692
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002693#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002694static struct nf_ct_event_notifier ctnl_notifier = {
2695 .fcn = ctnetlink_conntrack_event,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002696};
2697
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002698static struct nf_exp_event_notifier ctnl_notifier_exp = {
2699 .fcn = ctnetlink_expect_event,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002700};
2701#endif
2702
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002703static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002704 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002705 .attr_count = CTA_MAX,
2706 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002707 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002708 .attr_count = CTA_MAX,
2709 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002710 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002711 .attr_count = CTA_MAX,
2712 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002713 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002714 .attr_count = CTA_MAX,
2715 .policy = ct_nla_policy },
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002716 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
2717 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002718};
2719
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002720static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002721 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002722 .attr_count = CTA_EXPECT_MAX,
2723 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002724 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002725 .attr_count = CTA_EXPECT_MAX,
2726 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002727 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002728 .attr_count = CTA_EXPECT_MAX,
2729 .policy = exp_nla_policy },
Pablo Neira Ayuso392025f2012-06-26 20:27:09 +02002730 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002731};
2732
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002733static const struct nfnetlink_subsystem ctnl_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002734 .name = "conntrack",
2735 .subsys_id = NFNL_SUBSYS_CTNETLINK,
2736 .cb_count = IPCTNL_MSG_MAX,
2737 .cb = ctnl_cb,
2738};
2739
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002740static const struct nfnetlink_subsystem ctnl_exp_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002741 .name = "conntrack_expect",
2742 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
2743 .cb_count = IPCTNL_MSG_EXP_MAX,
2744 .cb = ctnl_exp_cb,
2745};
2746
Patrick McHardyd2483dd2006-12-02 22:06:05 -08002747MODULE_ALIAS("ip_conntrack_netlink");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002748MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
Pablo Neira Ayuso34f9a2e2006-02-04 02:11:41 -08002749MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002750
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01002751static int __net_init ctnetlink_net_init(struct net *net)
2752{
2753#ifdef CONFIG_NF_CONNTRACK_EVENTS
2754 int ret;
2755
2756 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
2757 if (ret < 0) {
2758 pr_err("ctnetlink_init: cannot register notifier.\n");
2759 goto err_out;
2760 }
2761
2762 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
2763 if (ret < 0) {
2764 pr_err("ctnetlink_init: cannot expect register notifier.\n");
2765 goto err_unreg_notifier;
2766 }
2767#endif
2768 return 0;
2769
2770#ifdef CONFIG_NF_CONNTRACK_EVENTS
2771err_unreg_notifier:
2772 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2773err_out:
2774 return ret;
2775#endif
2776}
2777
2778static void ctnetlink_net_exit(struct net *net)
2779{
2780#ifdef CONFIG_NF_CONNTRACK_EVENTS
2781 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
2782 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2783#endif
2784}
2785
2786static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
2787{
2788 struct net *net;
2789
2790 list_for_each_entry(net, net_exit_list, exit_list)
2791 ctnetlink_net_exit(net);
2792}
2793
2794static struct pernet_operations ctnetlink_net_ops = {
2795 .init = ctnetlink_net_init,
2796 .exit_batch = ctnetlink_net_exit_batch,
2797};
2798
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002799static int __init ctnetlink_init(void)
2800{
2801 int ret;
2802
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002803 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002804 ret = nfnetlink_subsys_register(&ctnl_subsys);
2805 if (ret < 0) {
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002806 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002807 goto err_out;
2808 }
2809
2810 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
2811 if (ret < 0) {
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002812 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002813 goto err_unreg_subsys;
2814 }
2815
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01002816 if (register_pernet_subsys(&ctnetlink_net_ops)) {
2817 pr_err("ctnetlink_init: cannot register pernet operations\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002818 goto err_unreg_exp_subsys;
2819 }
Pablo Neira Ayuso7c622342012-06-19 02:10:57 +02002820#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002821 /* setup interaction between nf_queue and nf_conntrack_netlink. */
2822 RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook);
2823#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002824 return 0;
2825
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002826err_unreg_exp_subsys:
2827 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002828err_unreg_subsys:
2829 nfnetlink_subsys_unregister(&ctnl_subsys);
2830err_out:
2831 return ret;
2832}
2833
2834static void __exit ctnetlink_exit(void)
2835{
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002836 pr_info("ctnetlink: unregistering from nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002837
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01002838 unregister_pernet_subsys(&ctnetlink_net_ops);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002839 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
2840 nfnetlink_subsys_unregister(&ctnl_subsys);
Pablo Neira Ayuso7c622342012-06-19 02:10:57 +02002841#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002842 RCU_INIT_POINTER(nfq_ct_hook, NULL);
2843#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002844}
2845
2846module_init(ctnetlink_init);
2847module_exit(ctnetlink_exit);