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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 Ayuso70e99422011-11-22 00:16:51 +01007 * (C) 2005-2011 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>
48#include <net/netfilter/nf_nat_protocol.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
481#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200482static inline size_t
483ctnetlink_proto_size(const struct nf_conn *ct)
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100484{
485 struct nf_conntrack_l3proto *l3proto;
486 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200487 size_t len = 0;
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100488
489 rcu_read_lock();
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200490 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100491 len += l3proto->nla_size;
492
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200493 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100494 len += l4proto->nla_size;
495 rcu_read_unlock();
496
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200497 return len;
498}
499
500static inline size_t
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200501ctnetlink_counters_size(const struct nf_conn *ct)
502{
503 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
504 return 0;
505 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
506 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
507 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
508 ;
509}
510
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800511static inline int
512ctnetlink_secctx_size(const struct nf_conn *ct)
Eric Paris1cc63242010-10-13 16:24:54 -0400513{
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800514#ifdef CONFIG_NF_CONNTRACK_SECMARK
515 int len, ret;
Eric Paris1cc63242010-10-13 16:24:54 -0400516
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800517 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
518 if (ret)
519 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400520
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800521 return nla_total_size(0) /* CTA_SECCTX */
522 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
523#else
524 return 0;
Eric Paris1cc63242010-10-13 16:24:54 -0400525#endif
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800526}
Eric Paris1cc63242010-10-13 16:24:54 -0400527
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200528static inline size_t
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100529ctnetlink_timestamp_size(const struct nf_conn *ct)
530{
531#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
532 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
533 return 0;
534 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
535#else
536 return 0;
537#endif
538}
539
540static inline size_t
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200541ctnetlink_nlmsg_size(const struct nf_conn *ct)
542{
543 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
544 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
545 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
546 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
547 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
548 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
549 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
Jiri Pirkod26e6a02010-04-01 12:39:19 +0200550 + ctnetlink_counters_size(ct)
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +0100551 + ctnetlink_timestamp_size(ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200552 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
553 + nla_total_size(0) /* CTA_PROTOINFO */
554 + nla_total_size(0) /* CTA_HELP */
555 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
Pablo Neira Ayusocba85b52011-01-06 11:25:00 -0800556 + ctnetlink_secctx_size(ct)
Pablo Neira Ayuso03b64f52009-06-02 20:08:27 +0200557#ifdef CONFIG_NF_NAT_NEEDED
558 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
559 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
560#endif
561#ifdef CONFIG_NF_CONNTRACK_MARK
562 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
563#endif
564 + ctnetlink_proto_size(ct)
565 ;
Holger Eitzenberger2732c4e2009-03-25 21:50:59 +0100566}
567
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
Patrick McHardy39938322009-08-25 16:07:58 +0200905ctnetlink_parse_help(const struct nlattr *attr, char **helper_name)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800906{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700907 struct nlattr *tb[CTA_HELP_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800908
Patrick McHardyd0b02682010-02-10 15:38:33 +0100909 nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800910
Patrick McHardydf6fb862007-09-28 14:37:03 -0700911 if (!tb[CTA_HELP_NAME])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800912 return -EINVAL;
913
Patrick McHardydf6fb862007-09-28 14:37:03 -0700914 *helper_name = nla_data(tb[CTA_HELP_NAME]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800915
916 return 0;
917}
918
Patrick McHardyf73e9242007-09-28 14:39:55 -0700919static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
Patrick McHardyd0b02682010-02-10 15:38:33 +0100920 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
921 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -0700922 [CTA_STATUS] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +0100923 [CTA_PROTOINFO] = { .type = NLA_NESTED },
924 [CTA_HELP] = { .type = NLA_NESTED },
925 [CTA_NAT_SRC] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -0700926 [CTA_TIMEOUT] = { .type = NLA_U32 },
927 [CTA_MARK] = { .type = NLA_U32 },
Patrick McHardyf73e9242007-09-28 14:39:55 -0700928 [CTA_ID] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +0100929 [CTA_NAT_DST] = { .type = NLA_NESTED },
930 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
Patrick McHardyef00f892010-02-15 18:14:57 +0100931 [CTA_ZONE] = { .type = NLA_U16 },
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +0000932 [CTA_MARK_MASK] = { .type = NLA_U32 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800933};
934
935static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800936ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +0200937 const struct nlmsghdr *nlh,
938 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800939{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100940 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800941 struct nf_conntrack_tuple_hash *h;
942 struct nf_conntrack_tuple tuple;
943 struct nf_conn *ct;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +0200944 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800945 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +0100946 u16 zone;
947 int err;
948
949 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
950 if (err < 0)
951 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800952
Patrick McHardydf6fb862007-09-28 14:37:03 -0700953 if (cda[CTA_TUPLE_ORIG])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800954 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
Patrick McHardydf6fb862007-09-28 14:37:03 -0700955 else if (cda[CTA_TUPLE_REPLY])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800956 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
957 else {
958 /* Flush the whole table */
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +0100959 nf_conntrack_flush_report(net,
Pablo Neira Ayuso274d3832009-06-02 20:08:38 +0200960 NETLINK_CB(skb).pid,
961 nlmsg_report(nlh));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800962 return 0;
963 }
964
965 if (err < 0)
966 return err;
967
Patrick McHardyef00f892010-02-15 18:14:57 +0100968 h = nf_conntrack_find_get(net, zone, &tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -0700969 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800970 return -ENOENT;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800971
972 ct = nf_ct_tuplehash_to_ctrack(h);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800973
Patrick McHardydf6fb862007-09-28 14:37:03 -0700974 if (cda[CTA_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -0800975 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
Patrick McHardy7f85f912007-09-28 14:41:27 -0700976 if (id != (u32)(unsigned long)ct) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800977 nf_ct_put(ct);
978 return -ENOENT;
979 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800980 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800981
Pablo Neira Ayusoa16a1642012-03-16 02:00:34 +0000982 if (del_timer(&ct->timeout)) {
983 if (nf_conntrack_event_report(IPCT_DESTROY, ct,
984 NETLINK_CB(skb).pid,
985 nlmsg_report(nlh)) < 0) {
986 nf_ct_delete_from_lists(ct);
987 /* we failed to report the event, try later */
988 nf_ct_insert_dying_list(ct);
989 nf_ct_put(ct);
990 return 0;
991 }
992 /* death_by_timeout would report the event again */
993 set_bit(IPS_DYING_BIT, &ct->status);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200994 nf_ct_delete_from_lists(ct);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200995 nf_ct_put(ct);
Pablo Neira Ayusodd7669a2009-06-13 12:30:52 +0200996 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800997 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800998
999 return 0;
1000}
1001
1002static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001003ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02001004 const struct nlmsghdr *nlh,
1005 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001006{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001007 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001008 struct nf_conntrack_tuple_hash *h;
1009 struct nf_conntrack_tuple tuple;
1010 struct nf_conn *ct;
1011 struct sk_buff *skb2 = NULL;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001012 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001013 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01001014 u16 zone;
1015 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001016
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001017 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1018 struct netlink_dump_control c = {
1019 .dump = ctnetlink_dump_table,
1020 .done = ctnetlink_done,
1021 };
Pablo Neira Ayuso0f298a22012-02-24 14:41:50 +00001022#ifdef CONFIG_NF_CONNTRACK_MARK
1023 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1024 struct ctnetlink_dump_filter *filter;
1025
1026 filter = kzalloc(sizeof(struct ctnetlink_dump_filter),
1027 GFP_ATOMIC);
1028 if (filter == NULL)
1029 return -ENOMEM;
1030
1031 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
1032 filter->mark.mask =
1033 ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
1034 c.data = filter;
1035 }
1036#endif
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001037 return netlink_dump_start(ctnl, skb, nlh, &c);
1038 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001039
Patrick McHardyef00f892010-02-15 18:14:57 +01001040 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1041 if (err < 0)
1042 return err;
1043
Patrick McHardydf6fb862007-09-28 14:37:03 -07001044 if (cda[CTA_TUPLE_ORIG])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001045 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001046 else if (cda[CTA_TUPLE_REPLY])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001047 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1048 else
1049 return -EINVAL;
1050
1051 if (err < 0)
1052 return err;
1053
Patrick McHardyef00f892010-02-15 18:14:57 +01001054 h = nf_conntrack_find_get(net, zone, &tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -07001055 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001056 return -ENOENT;
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -07001057
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001058 ct = nf_ct_tuplehash_to_ctrack(h);
1059
1060 err = -ENOMEM;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001061 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1062 if (skb2 == NULL) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001063 nf_ct_put(ct);
1064 return -ENOMEM;
1065 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001066
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001067 rcu_read_lock();
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001068 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
Pablo Neira Ayuso80e60e62011-12-24 14:11:39 +01001069 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001070 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001071 nf_ct_put(ct);
1072 if (err <= 0)
1073 goto free;
1074
1075 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1076 if (err < 0)
1077 goto out;
1078
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001079 return 0;
1080
1081free:
1082 kfree_skb(skb2);
1083out:
Pablo Neira Ayusof31e8d492011-01-13 14:19:55 +01001084 /* this avoids a loop in nfnetlink. */
1085 return err == -EAGAIN ? -ENOBUFS : err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001086}
1087
Pablo Neira Ayuso67671842008-10-20 03:34:27 -07001088#ifdef CONFIG_NF_NAT_NEEDED
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -08001089static int
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001090ctnetlink_parse_nat_setup(struct nf_conn *ct,
1091 enum nf_nat_manip_type manip,
Patrick McHardy39938322009-08-25 16:07:58 +02001092 const struct nlattr *attr)
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001093{
1094 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
1095
1096 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1097 if (!parse_nat_setup) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07001098#ifdef CONFIG_MODULES
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001099 rcu_read_unlock();
1100 nfnl_unlock();
1101 if (request_module("nf-nat-ipv4") < 0) {
1102 nfnl_lock();
1103 rcu_read_lock();
1104 return -EOPNOTSUPP;
1105 }
1106 nfnl_lock();
1107 rcu_read_lock();
1108 if (nfnetlink_parse_nat_setup_hook)
1109 return -EAGAIN;
1110#endif
1111 return -EOPNOTSUPP;
1112 }
1113
1114 return parse_nat_setup(ct, manip, attr);
1115}
Pablo Neira Ayuso67671842008-10-20 03:34:27 -07001116#endif
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001117
1118static int
Patrick McHardy39938322009-08-25 16:07:58 +02001119ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001120{
1121 unsigned long d;
Patrick McHardy77236b62007-12-17 22:29:45 -08001122 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001123 d = ct->status ^ status;
1124
1125 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1126 /* unchangeable */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001127 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001128
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001129 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1130 /* SEEN_REPLY bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001131 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001132
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001133 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1134 /* ASSURED bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001135 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001136
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001137 /* Be careful here, modifying NAT bits can screw up things,
1138 * so don't let users modify them directly if they don't pass
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -08001139 * nf_nat_range. */
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001140 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1141 return 0;
1142}
1143
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001144static int
Patrick McHardy39938322009-08-25 16:07:58 +02001145ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001146{
1147#ifdef CONFIG_NF_NAT_NEEDED
1148 int ret;
1149
1150 if (cda[CTA_NAT_DST]) {
1151 ret = ctnetlink_parse_nat_setup(ct,
Patrick McHardycbc9f2f2011-12-23 13:59:49 +01001152 NF_NAT_MANIP_DST,
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001153 cda[CTA_NAT_DST]);
1154 if (ret < 0)
1155 return ret;
1156 }
1157 if (cda[CTA_NAT_SRC]) {
1158 ret = ctnetlink_parse_nat_setup(ct,
Patrick McHardycbc9f2f2011-12-23 13:59:49 +01001159 NF_NAT_MANIP_SRC,
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001160 cda[CTA_NAT_SRC]);
1161 if (ret < 0)
1162 return ret;
1163 }
1164 return 0;
1165#else
1166 return -EOPNOTSUPP;
1167#endif
1168}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001169
1170static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001171ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001172{
1173 struct nf_conntrack_helper *helper;
Harald Weltedc808fe2006-03-20 17:56:32 -08001174 struct nf_conn_help *help = nfct_help(ct);
Pablo Neira Ayuso29fe1b42009-04-22 02:26:37 -07001175 char *helpname = NULL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001176 int err;
1177
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001178 /* don't change helper of sibling connections */
1179 if (ct->master)
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001180 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001181
Patrick McHardydf6fb862007-09-28 14:37:03 -07001182 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001183 if (err < 0)
1184 return err;
1185
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001186 if (!strcmp(helpname, "")) {
1187 if (help && help->helper) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001188 /* we had a helper before ... */
1189 nf_ct_remove_expectations(ct);
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001190 RCU_INIT_POINTER(help->helper, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001191 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001192
1193 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001194 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001195
Patrick McHardy794e6872010-02-03 13:41:29 +01001196 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1197 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001198 if (helper == NULL) {
1199#ifdef CONFIG_MODULES
1200 spin_unlock_bh(&nf_conntrack_lock);
1201
1202 if (request_module("nfct-helper-%s", helpname) < 0) {
1203 spin_lock_bh(&nf_conntrack_lock);
1204 return -EOPNOTSUPP;
1205 }
1206
1207 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy794e6872010-02-03 13:41:29 +01001208 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1209 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001210 if (helper)
1211 return -EAGAIN;
1212#endif
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001213 return -EOPNOTSUPP;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001214 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001215
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001216 if (help) {
1217 if (help->helper == helper)
1218 return 0;
1219 if (help->helper)
1220 return -EBUSY;
1221 /* need to zero data of old helper */
Pablo Neira Ayuso1afc5672012-06-07 12:11:50 +02001222 memset(help->data, 0, help->helper->data_len);
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001223 } else {
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001224 /* we cannot set a helper for an existing conntrack */
1225 return -EOPNOTSUPP;
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001226 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -07001227
Eric Dumazetcf778b02012-01-12 04:41:32 +00001228 rcu_assign_pointer(help->helper, helper);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001229
1230 return 0;
1231}
1232
1233static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001234ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001235{
Patrick McHardy77236b62007-12-17 22:29:45 -08001236 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001237
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001238 if (!del_timer(&ct->timeout))
1239 return -ETIME;
1240
1241 ct->timeout.expires = jiffies + timeout * HZ;
1242 add_timer(&ct->timeout);
1243
1244 return 0;
1245}
1246
Patrick McHardyd0b02682010-02-10 15:38:33 +01001247static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1248 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1249 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1250 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1251};
1252
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001253static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001254ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001255{
Patrick McHardy39938322009-08-25 16:07:58 +02001256 const struct nlattr *attr = cda[CTA_PROTOINFO];
1257 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
Martin Josefsson605dcad2006-11-29 02:35:06 +01001258 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001259 int err = 0;
1260
Patrick McHardyd0b02682010-02-10 15:38:33 +01001261 nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001262
Florian Westphalcd915662009-03-18 17:28:37 +01001263 rcu_read_lock();
1264 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
Patrick McHardyfdf70832007-09-28 14:37:41 -07001265 if (l4proto->from_nlattr)
1266 err = l4proto->from_nlattr(tb, ct);
Florian Westphalcd915662009-03-18 17:28:37 +01001267 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001268
1269 return err;
1270}
1271
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001272#ifdef CONFIG_NF_NAT_NEEDED
Patrick McHardyd0b02682010-02-10 15:38:33 +01001273static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = {
1274 [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 },
1275 [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 },
1276 [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 },
1277};
1278
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001279static inline int
Patrick McHardy39938322009-08-25 16:07:58 +02001280change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr)
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001281{
1282 struct nlattr *cda[CTA_NAT_SEQ_MAX+1];
1283
Patrick McHardyd0b02682010-02-10 15:38:33 +01001284 nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy);
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001285
1286 if (!cda[CTA_NAT_SEQ_CORRECTION_POS])
1287 return -EINVAL;
1288
1289 natseq->correction_pos =
Patrick McHardy77236b62007-12-17 22:29:45 -08001290 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001291
1292 if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE])
1293 return -EINVAL;
1294
1295 natseq->offset_before =
Patrick McHardy77236b62007-12-17 22:29:45 -08001296 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001297
1298 if (!cda[CTA_NAT_SEQ_OFFSET_AFTER])
1299 return -EINVAL;
1300
1301 natseq->offset_after =
Patrick McHardy77236b62007-12-17 22:29:45 -08001302 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001303
1304 return 0;
1305}
1306
1307static int
Patrick McHardy39938322009-08-25 16:07:58 +02001308ctnetlink_change_nat_seq_adj(struct nf_conn *ct,
1309 const struct nlattr * const cda[])
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001310{
1311 int ret = 0;
1312 struct nf_conn_nat *nat = nfct_nat(ct);
1313
1314 if (!nat)
1315 return 0;
1316
1317 if (cda[CTA_NAT_SEQ_ADJ_ORIG]) {
1318 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL],
1319 cda[CTA_NAT_SEQ_ADJ_ORIG]);
1320 if (ret < 0)
1321 return ret;
1322
1323 ct->status |= IPS_SEQ_ADJUST;
1324 }
1325
1326 if (cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1327 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY],
1328 cda[CTA_NAT_SEQ_ADJ_REPLY]);
1329 if (ret < 0)
1330 return ret;
1331
1332 ct->status |= IPS_SEQ_ADJUST;
1333 }
1334
1335 return 0;
1336}
1337#endif
1338
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001339static int
Patrick McHardy39938322009-08-25 16:07:58 +02001340ctnetlink_change_conntrack(struct nf_conn *ct,
1341 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001342{
1343 int err;
1344
Pablo Neira Ayusoe0983602009-03-16 15:27:22 +01001345 /* only allow NAT changes and master assignation for new conntracks */
1346 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1347 return -EOPNOTSUPP;
1348
Patrick McHardydf6fb862007-09-28 14:37:03 -07001349 if (cda[CTA_HELP]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001350 err = ctnetlink_change_helper(ct, cda);
1351 if (err < 0)
1352 return err;
1353 }
1354
Patrick McHardydf6fb862007-09-28 14:37:03 -07001355 if (cda[CTA_TIMEOUT]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001356 err = ctnetlink_change_timeout(ct, cda);
1357 if (err < 0)
1358 return err;
1359 }
1360
Patrick McHardydf6fb862007-09-28 14:37:03 -07001361 if (cda[CTA_STATUS]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001362 err = ctnetlink_change_status(ct, cda);
1363 if (err < 0)
1364 return err;
1365 }
1366
Patrick McHardydf6fb862007-09-28 14:37:03 -07001367 if (cda[CTA_PROTOINFO]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001368 err = ctnetlink_change_protoinfo(ct, cda);
1369 if (err < 0)
1370 return err;
1371 }
1372
Martin Josefssonbcd1e832006-04-01 02:23:21 -08001373#if defined(CONFIG_NF_CONNTRACK_MARK)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001374 if (cda[CTA_MARK])
Patrick McHardy77236b62007-12-17 22:29:45 -08001375 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001376#endif
1377
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001378#ifdef CONFIG_NF_NAT_NEEDED
1379 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1380 err = ctnetlink_change_nat_seq_adj(ct, cda);
1381 if (err < 0)
1382 return err;
1383 }
1384#endif
1385
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001386 return 0;
1387}
1388
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001389static struct nf_conn *
Patrick McHardyef00f892010-02-15 18:14:57 +01001390ctnetlink_create_conntrack(struct net *net, u16 zone,
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001391 const struct nlattr * const cda[],
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001392 struct nf_conntrack_tuple *otuple,
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001393 struct nf_conntrack_tuple *rtuple,
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001394 u8 u3)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001395{
1396 struct nf_conn *ct;
1397 int err = -EINVAL;
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001398 struct nf_conntrack_helper *helper;
Pablo Neira Ayuso315c34d2011-04-21 10:55:07 +02001399 struct nf_conn_tstamp *tstamp;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001400
Patrick McHardyef00f892010-02-15 18:14:57 +01001401 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
Julia Lawallcd7fcbf2009-01-12 00:06:08 +00001402 if (IS_ERR(ct))
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001403 return ERR_PTR(-ENOMEM);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001404
Patrick McHardydf6fb862007-09-28 14:37:03 -07001405 if (!cda[CTA_TIMEOUT])
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001406 goto err1;
Patrick McHardy77236b62007-12-17 22:29:45 -08001407 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001408
1409 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001410
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001411 rcu_read_lock();
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001412 if (cda[CTA_HELP]) {
Pablo Neira Ayuso29fe1b42009-04-22 02:26:37 -07001413 char *helpname = NULL;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001414
1415 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001416 if (err < 0)
1417 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001418
Patrick McHardy794e6872010-02-03 13:41:29 +01001419 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1420 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001421 if (helper == NULL) {
1422 rcu_read_unlock();
1423#ifdef CONFIG_MODULES
1424 if (request_module("nfct-helper-%s", helpname) < 0) {
1425 err = -EOPNOTSUPP;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001426 goto err1;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001427 }
1428
1429 rcu_read_lock();
Patrick McHardy794e6872010-02-03 13:41:29 +01001430 helper = __nf_conntrack_helper_find(helpname,
1431 nf_ct_l3num(ct),
1432 nf_ct_protonum(ct));
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001433 if (helper) {
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001434 err = -EAGAIN;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001435 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001436 }
1437 rcu_read_unlock();
1438#endif
1439 err = -EOPNOTSUPP;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001440 goto err1;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001441 } else {
1442 struct nf_conn_help *help;
1443
Pablo Neira Ayuso1afc5672012-06-07 12:11:50 +02001444 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001445 if (help == NULL) {
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001446 err = -ENOMEM;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001447 goto err2;
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001448 }
1449
1450 /* not in hash table yet so not strictly necessary */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001451 RCU_INIT_POINTER(help->helper, helper);
Pablo Neira Ayuso226c0c02008-11-18 11:54:05 +01001452 }
1453 } else {
1454 /* try an implicit helper assignation */
Patrick McHardyb2a15a62010-02-03 14:13:03 +01001455 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001456 if (err < 0)
1457 goto err2;
Patrick McHarrdy3c158f72007-06-05 12:55:27 -07001458 }
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001459
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001460 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
1461 err = ctnetlink_change_nat(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001462 if (err < 0)
1463 goto err2;
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001464 }
1465
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001466 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
Pablo Neira Ayusoa992ca22011-01-19 16:00:07 +01001467 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
Pablo Neira Ayusoa88e22a2010-02-19 14:24:39 +01001468 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
1469 /* we must add conntrack extensions before confirmation. */
1470 ct->status |= IPS_CONFIRMED;
1471
1472 if (cda[CTA_STATUS]) {
1473 err = ctnetlink_change_status(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001474 if (err < 0)
1475 goto err2;
Pablo Neira Ayusoe6a7d3c2008-10-14 11:58:31 -07001476 }
1477
Pablo Neira Ayusoc969aa72009-02-09 14:33:57 -08001478#ifdef CONFIG_NF_NAT_NEEDED
1479 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1480 err = ctnetlink_change_nat_seq_adj(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001481 if (err < 0)
1482 goto err2;
Pablo Neira Ayusoc969aa72009-02-09 14:33:57 -08001483 }
1484#endif
1485
Changli Gaoe5fc9e72010-11-12 17:33:17 +01001486 memset(&ct->proto, 0, sizeof(ct->proto));
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001487 if (cda[CTA_PROTOINFO]) {
1488 err = ctnetlink_change_protoinfo(ct, cda);
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001489 if (err < 0)
1490 goto err2;
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001491 }
1492
Pablo Neira Ayuso1575e7e2008-08-18 21:30:55 -07001493#if defined(CONFIG_NF_CONNTRACK_MARK)
1494 if (cda[CTA_MARK])
1495 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1496#endif
1497
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001498 /* setup master conntrack: this is a confirmed expectation */
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001499 if (cda[CTA_TUPLE_MASTER]) {
1500 struct nf_conntrack_tuple master;
1501 struct nf_conntrack_tuple_hash *master_h;
1502 struct nf_conn *master_ct;
1503
1504 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
1505 if (err < 0)
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001506 goto err2;
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001507
Patrick McHardyef00f892010-02-15 18:14:57 +01001508 master_h = nf_conntrack_find_get(net, zone, &master);
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001509 if (master_h == NULL) {
1510 err = -ENOENT;
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001511 goto err2;
Pablo Neira Ayuso7ec47492009-03-16 15:25:46 +01001512 }
1513 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001514 __set_bit(IPS_EXPECTED_BIT, &ct->status);
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001515 ct->master = master_ct;
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001516 }
Pablo Neira Ayuso315c34d2011-04-21 10:55:07 +02001517 tstamp = nf_conn_tstamp_find(ct);
1518 if (tstamp)
1519 tstamp->start = ktime_to_ns(ktime_get_real());
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001520
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001521 err = nf_conntrack_hash_check_insert(ct);
1522 if (err < 0)
1523 goto err2;
1524
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001525 rcu_read_unlock();
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001526
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001527 return ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001528
Patrick McHardy0f5b3e82009-03-18 17:36:40 +01001529err2:
1530 rcu_read_unlock();
1531err1:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001532 nf_conntrack_free(ct);
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001533 return ERR_PTR(err);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001534}
1535
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001536static int
1537ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02001538 const struct nlmsghdr *nlh,
1539 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001540{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001541 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001542 struct nf_conntrack_tuple otuple, rtuple;
1543 struct nf_conntrack_tuple_hash *h = NULL;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001544 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001545 struct nf_conn *ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001546 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01001547 u16 zone;
1548 int err;
1549
1550 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1551 if (err < 0)
1552 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001553
Patrick McHardydf6fb862007-09-28 14:37:03 -07001554 if (cda[CTA_TUPLE_ORIG]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001555 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3);
1556 if (err < 0)
1557 return err;
1558 }
1559
Patrick McHardydf6fb862007-09-28 14:37:03 -07001560 if (cda[CTA_TUPLE_REPLY]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001561 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3);
1562 if (err < 0)
1563 return err;
1564 }
1565
Patrick McHardydf6fb862007-09-28 14:37:03 -07001566 if (cda[CTA_TUPLE_ORIG])
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001567 h = nf_conntrack_find_get(net, zone, &otuple);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001568 else if (cda[CTA_TUPLE_REPLY])
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001569 h = nf_conntrack_find_get(net, zone, &rtuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001570
1571 if (h == NULL) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001572 err = -ENOENT;
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001573 if (nlh->nlmsg_flags & NLM_F_CREATE) {
Pablo Neira Ayusofecc1132009-05-05 17:48:26 +02001574 enum ip_conntrack_events events;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001575
Patrick McHardyef00f892010-02-15 18:14:57 +01001576 ct = ctnetlink_create_conntrack(net, zone, cda, &otuple,
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001577 &rtuple, u3);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001578 if (IS_ERR(ct))
1579 return PTR_ERR(ct);
1580
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001581 err = 0;
Pablo Neira Ayusofecc1132009-05-05 17:48:26 +02001582 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1583 events = IPCT_RELATED;
1584 else
1585 events = IPCT_NEW;
1586
Patrick McHardy858b31332010-02-03 13:48:53 +01001587 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1588 (1 << IPCT_ASSURED) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001589 (1 << IPCT_HELPER) |
1590 (1 << IPCT_PROTOINFO) |
1591 (1 << IPCT_NATSEQADJ) |
1592 (1 << IPCT_MARK) | events,
1593 ct, NETLINK_CB(skb).pid,
1594 nlmsg_report(nlh));
Pablo Neira Ayusof0a3c082009-03-16 15:28:09 +01001595 nf_ct_put(ct);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001596 }
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001597
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001598 return err;
1599 }
1600 /* implicit 'else' */
1601
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001602 err = -EEXIST;
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001603 ct = nf_ct_tuplehash_to_ctrack(h);
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001604 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001605 spin_lock_bh(&nf_conntrack_lock);
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01001606 err = ctnetlink_change_conntrack(ct, cda);
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001607 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01001608 if (err == 0) {
Patrick McHardy858b31332010-02-03 13:48:53 +01001609 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1610 (1 << IPCT_ASSURED) |
Pablo Neira Ayusoa0891aa2009-06-13 12:26:29 +02001611 (1 << IPCT_HELPER) |
1612 (1 << IPCT_PROTOINFO) |
1613 (1 << IPCT_NATSEQADJ) |
1614 (1 << IPCT_MARK),
1615 ct, NETLINK_CB(skb).pid,
1616 nlmsg_report(nlh));
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001617 }
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001618 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001619
Jozsef Kadlecsik7d367e02012-02-24 11:45:49 +01001620 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001621 return err;
1622}
1623
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02001624#if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \
1625 defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE)
1626static size_t
1627ctnetlink_nfqueue_build_size(const struct nf_conn *ct)
1628{
1629 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
1630 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
1631 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
1632 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
1633 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
1634 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
1635 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
1636 + nla_total_size(0) /* CTA_PROTOINFO */
1637 + nla_total_size(0) /* CTA_HELP */
1638 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
1639 + ctnetlink_secctx_size(ct)
1640#ifdef CONFIG_NF_NAT_NEEDED
1641 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
1642 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
1643#endif
1644#ifdef CONFIG_NF_CONNTRACK_MARK
1645 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
1646#endif
1647 + ctnetlink_proto_size(ct)
1648 ;
1649}
1650
1651static int
1652ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
1653{
1654 struct nlattr *nest_parms;
1655
1656 rcu_read_lock();
1657 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
1658 if (!nest_parms)
1659 goto nla_put_failure;
1660 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
1661 goto nla_put_failure;
1662 nla_nest_end(skb, nest_parms);
1663
1664 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
1665 if (!nest_parms)
1666 goto nla_put_failure;
1667 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
1668 goto nla_put_failure;
1669 nla_nest_end(skb, nest_parms);
1670
1671 if (nf_ct_zone(ct)) {
1672 if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
1673 goto nla_put_failure;
1674 }
1675
1676 if (ctnetlink_dump_id(skb, ct) < 0)
1677 goto nla_put_failure;
1678
1679 if (ctnetlink_dump_status(skb, ct) < 0)
1680 goto nla_put_failure;
1681
1682 if (ctnetlink_dump_timeout(skb, ct) < 0)
1683 goto nla_put_failure;
1684
1685 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
1686 goto nla_put_failure;
1687
1688 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
1689 goto nla_put_failure;
1690
1691#ifdef CONFIG_NF_CONNTRACK_SECMARK
1692 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
1693 goto nla_put_failure;
1694#endif
1695 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
1696 goto nla_put_failure;
1697
1698 if ((ct->status & IPS_SEQ_ADJUST) &&
1699 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
1700 goto nla_put_failure;
1701
1702#ifdef CONFIG_NF_CONNTRACK_MARK
1703 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
1704 goto nla_put_failure;
1705#endif
1706 rcu_read_unlock();
1707 return 0;
1708
1709nla_put_failure:
1710 rcu_read_unlock();
1711 return -ENOSPC;
1712}
1713
1714static int
1715ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
1716{
1717 int err;
1718
1719 if (cda[CTA_TIMEOUT]) {
1720 err = ctnetlink_change_timeout(ct, cda);
1721 if (err < 0)
1722 return err;
1723 }
1724 if (cda[CTA_STATUS]) {
1725 err = ctnetlink_change_status(ct, cda);
1726 if (err < 0)
1727 return err;
1728 }
1729 if (cda[CTA_HELP]) {
1730 err = ctnetlink_change_helper(ct, cda);
1731 if (err < 0)
1732 return err;
1733 }
1734#if defined(CONFIG_NF_CONNTRACK_MARK)
1735 if (cda[CTA_MARK])
1736 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1737#endif
1738 return 0;
1739}
1740
1741static int
1742ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct)
1743{
1744 struct nlattr *cda[CTA_MAX+1];
1745
1746 nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
1747
1748 return ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct);
1749}
1750
1751static struct nfq_ct_hook ctnetlink_nfqueue_hook = {
1752 .build_size = ctnetlink_nfqueue_build_size,
1753 .build = ctnetlink_nfqueue_build,
1754 .parse = ctnetlink_nfqueue_parse,
Pablo Neira Ayuso8c88f872012-06-07 13:31:25 +02001755#ifdef CONFIG_NF_NAT_NEEDED
1756 .seq_adjust = nf_nat_tcp_seq_adjust,
1757#endif
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02001758};
1759#endif /* CONFIG_NETFILTER_NETLINK_QUEUE */
1760
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001761/***********************************************************************
1762 * EXPECT
1763 ***********************************************************************/
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001764
1765static inline int
1766ctnetlink_exp_dump_tuple(struct sk_buff *skb,
1767 const struct nf_conntrack_tuple *tuple,
1768 enum ctattr_expect type)
1769{
Patrick McHardydf6fb862007-09-28 14:37:03 -07001770 struct nlattr *nest_parms;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001771
Patrick McHardydf6fb862007-09-28 14:37:03 -07001772 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
1773 if (!nest_parms)
1774 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001775 if (ctnetlink_dump_tuples(skb, tuple) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001776 goto nla_put_failure;
1777 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001778
1779 return 0;
1780
Patrick McHardydf6fb862007-09-28 14:37:03 -07001781nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001782 return -1;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001783}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001784
1785static inline int
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001786ctnetlink_exp_dump_mask(struct sk_buff *skb,
1787 const struct nf_conntrack_tuple *tuple,
Patrick McHardyd4156e82007-07-07 22:31:32 -07001788 const struct nf_conntrack_tuple_mask *mask)
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001789{
1790 int ret;
1791 struct nf_conntrack_l3proto *l3proto;
Martin Josefsson605dcad2006-11-29 02:35:06 +01001792 struct nf_conntrack_l4proto *l4proto;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001793 struct nf_conntrack_tuple m;
Patrick McHardydf6fb862007-09-28 14:37:03 -07001794 struct nlattr *nest_parms;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001795
1796 memset(&m, 0xFF, sizeof(m));
Patrick McHardyd4156e82007-07-07 22:31:32 -07001797 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
Patrick McHardye5787562010-01-26 17:04:02 +01001798 m.src.u.all = mask->src.u.all;
1799 m.dst.protonum = tuple->dst.protonum;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001800
Patrick McHardydf6fb862007-09-28 14:37:03 -07001801 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
1802 if (!nest_parms)
1803 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001804
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00001805 rcu_read_lock();
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001806 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
Patrick McHardyd4156e82007-07-07 22:31:32 -07001807 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00001808 if (ret >= 0) {
1809 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
1810 tuple->dst.protonum);
Patrick McHardyd4156e82007-07-07 22:31:32 -07001811 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
Hans Schillstrom3b988ec2012-03-05 02:24:29 +00001812 }
1813 rcu_read_unlock();
1814
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001815 if (unlikely(ret < 0))
Patrick McHardydf6fb862007-09-28 14:37:03 -07001816 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001817
Patrick McHardydf6fb862007-09-28 14:37:03 -07001818 nla_nest_end(skb, nest_parms);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001819
1820 return 0;
1821
Patrick McHardydf6fb862007-09-28 14:37:03 -07001822nla_put_failure:
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001823 return -1;
1824}
1825
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -08001826static int
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001827ctnetlink_exp_dump_expect(struct sk_buff *skb,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001828 const struct nf_conntrack_expect *exp)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001829{
1830 struct nf_conn *master = exp->master;
Xi Wangc1216382011-12-30 10:40:17 -05001831 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02001832 struct nf_conn_help *help;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01001833#ifdef CONFIG_NF_NAT_NEEDED
1834 struct nlattr *nest_parms;
1835 struct nf_conntrack_tuple nat_tuple = {};
1836#endif
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01001837 struct nf_ct_helper_expectfn *expfn;
1838
Patrick McHardyd978e5d2007-12-17 22:37:03 -08001839 if (timeout < 0)
1840 timeout = 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001841
1842 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001843 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001844 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001845 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001846 if (ctnetlink_exp_dump_tuple(skb,
1847 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
1848 CTA_EXPECT_MASTER) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001849 goto nla_put_failure;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001850
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01001851#ifdef CONFIG_NF_NAT_NEEDED
1852 if (exp->saved_ip || exp->saved_proto.all) {
1853 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
1854 if (!nest_parms)
1855 goto nla_put_failure;
1856
David S. Millercc1eb432012-04-01 18:57:48 -04001857 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
1858 goto nla_put_failure;
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01001859
1860 nat_tuple.src.l3num = nf_ct_l3num(master);
1861 nat_tuple.src.u3.ip = exp->saved_ip;
1862 nat_tuple.dst.protonum = nf_ct_protonum(master);
1863 nat_tuple.src.u = exp->saved_proto;
1864
1865 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
1866 CTA_EXPECT_NAT_TUPLE) < 0)
1867 goto nla_put_failure;
1868 nla_nest_end(skb, nest_parms);
1869 }
1870#endif
David S. Millercc1eb432012-04-01 18:57:48 -04001871 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
1872 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
1873 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
1874 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
1875 goto nla_put_failure;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02001876 help = nfct_help(master);
1877 if (help) {
1878 struct nf_conntrack_helper *helper;
1879
1880 helper = rcu_dereference(help->helper);
David S. Millercc1eb432012-04-01 18:57:48 -04001881 if (helper &&
1882 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
1883 goto nla_put_failure;
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02001884 }
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01001885 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
David S. Millercc1eb432012-04-01 18:57:48 -04001886 if (expfn != NULL &&
1887 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
1888 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001889
1890 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001891
Patrick McHardydf6fb862007-09-28 14:37:03 -07001892nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001893 return -1;
1894}
1895
1896static int
1897ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02001898 int event, const struct nf_conntrack_expect *exp)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001899{
1900 struct nlmsghdr *nlh;
1901 struct nfgenmsg *nfmsg;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001902 unsigned int flags = pid ? NLM_F_MULTI : 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001903
1904 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001905 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
1906 if (nlh == NULL)
1907 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001908
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001909 nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001910 nfmsg->nfgen_family = exp->tuple.src.l3num;
1911 nfmsg->version = NFNETLINK_V0;
1912 nfmsg->res_id = 0;
1913
1914 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001915 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001916
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001917 nlmsg_end(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001918 return skb->len;
1919
1920nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -07001921nla_put_failure:
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001922 nlmsg_cancel(skb, nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001923 return -1;
1924}
1925
1926#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02001927static int
1928ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001929{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001930 struct nf_conntrack_expect *exp = item->exp;
1931 struct net *net = nf_ct_exp_net(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001932 struct nlmsghdr *nlh;
1933 struct nfgenmsg *nfmsg;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001934 struct sk_buff *skb;
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02001935 unsigned int type, group;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001936 int flags = 0;
1937
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02001938 if (events & (1 << IPEXP_DESTROY)) {
1939 type = IPCTNL_MSG_EXP_DELETE;
1940 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
1941 } else if (events & (1 << IPEXP_NEW)) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001942 type = IPCTNL_MSG_EXP_NEW;
1943 flags = NLM_F_CREATE|NLM_F_EXCL;
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02001944 group = NFNLGRP_CONNTRACK_EXP_NEW;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001945 } else
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02001946 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001947
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02001948 if (!item->report && !nfnetlink_has_listeners(net, group))
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02001949 return 0;
Pablo Neira Ayusob3a27bf2006-08-22 00:32:05 -07001950
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001951 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1952 if (skb == NULL)
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +02001953 goto errout;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001954
Marcus Sundbergb633ad52006-02-04 02:11:09 -08001955 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001956 nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags);
1957 if (nlh == NULL)
1958 goto nlmsg_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001959
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001960 nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001961 nfmsg->nfgen_family = exp->tuple.src.l3num;
1962 nfmsg->version = NFNETLINK_V0;
1963 nfmsg->res_id = 0;
1964
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001965 rcu_read_lock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001966 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001967 goto nla_put_failure;
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001968 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001969
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001970 nlmsg_end(skb, nlh);
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02001971 nfnetlink_send(skb, net, item->pid, group, item->report, GFP_ATOMIC);
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02001972 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001973
Patrick McHardydf6fb862007-09-28 14:37:03 -07001974nla_put_failure:
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001975 rcu_read_unlock();
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001976 nlmsg_cancel(skb, nlh);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01001977nlmsg_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001978 kfree_skb(skb);
Pablo Neira Ayuso150ace02009-04-17 17:47:31 +02001979errout:
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001980 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02001981 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001982}
1983#endif
Patrick McHardycf6994c2007-07-07 22:32:34 -07001984static int ctnetlink_exp_done(struct netlink_callback *cb)
1985{
Patrick McHardy31f15872007-07-07 22:35:21 -07001986 if (cb->args[1])
1987 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
Patrick McHardycf6994c2007-07-07 22:32:34 -07001988 return 0;
1989}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001990
1991static int
1992ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
1993{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01001994 struct net *net = sock_net(skb->sk);
Patrick McHardycf6994c2007-07-07 22:32:34 -07001995 struct nf_conntrack_expect *exp, *last;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02001996 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
Patrick McHardy31f15872007-07-07 22:35:21 -07001997 struct hlist_node *n;
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -08001998 u_int8_t l3proto = nfmsg->nfgen_family;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001999
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002000 rcu_read_lock();
Patrick McHardy31f15872007-07-07 22:35:21 -07002001 last = (struct nf_conntrack_expect *)cb->args[1];
2002 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
Patrick McHardycf6994c2007-07-07 22:32:34 -07002003restart:
Alexey Dobriyan9b03f382008-10-08 11:35:03 +02002004 hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]],
Patrick McHardy31f15872007-07-07 22:35:21 -07002005 hnode) {
2006 if (l3proto && exp->tuple.src.l3num != l3proto)
Patrick McHardycf6994c2007-07-07 22:32:34 -07002007 continue;
Patrick McHardy31f15872007-07-07 22:35:21 -07002008 if (cb->args[1]) {
2009 if (exp != last)
2010 continue;
2011 cb->args[1] = 0;
2012 }
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002013 if (ctnetlink_exp_fill_info(skb,
2014 NETLINK_CB(cb->skb).pid,
Patrick McHardy31f15872007-07-07 22:35:21 -07002015 cb->nlh->nlmsg_seq,
2016 IPCTNL_MSG_EXP_NEW,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002017 exp) < 0) {
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002018 if (!atomic_inc_not_zero(&exp->use))
2019 continue;
Patrick McHardy31f15872007-07-07 22:35:21 -07002020 cb->args[1] = (unsigned long)exp;
2021 goto out;
2022 }
Patrick McHardycf6994c2007-07-07 22:32:34 -07002023 }
Patrick McHardy31f15872007-07-07 22:35:21 -07002024 if (cb->args[1]) {
2025 cb->args[1] = 0;
2026 goto restart;
Patrick McHardycf6994c2007-07-07 22:32:34 -07002027 }
2028 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002029out:
Patrick McHardy7d0742d2008-01-31 04:38:19 -08002030 rcu_read_unlock();
Patrick McHardycf6994c2007-07-07 22:32:34 -07002031 if (last)
2032 nf_ct_expect_put(last);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002033
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002034 return skb->len;
2035}
2036
Patrick McHardyf73e9242007-09-28 14:39:55 -07002037static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
Patrick McHardyd0b02682010-02-10 15:38:33 +01002038 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2039 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2040 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
Patrick McHardyf73e9242007-09-28 14:39:55 -07002041 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2042 [CTA_EXPECT_ID] = { .type = NLA_U32 },
Patrick McHardyd0b02682010-02-10 15:38:33 +01002043 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING },
Pablo Neira Ayusobcac0df2010-09-22 08:35:36 +02002044 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
Pablo Neira Ayuso8b008fa2010-09-22 08:36:59 +02002045 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002046 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002047 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002048 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002049};
2050
2051static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002052ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02002053 const struct nlmsghdr *nlh,
2054 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002055{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002056 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002057 struct nf_conntrack_tuple tuple;
2058 struct nf_conntrack_expect *exp;
2059 struct sk_buff *skb2;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002060 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002061 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01002062 u16 zone;
2063 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002064
David S. Millerb8f3ab42011-01-18 12:40:38 -08002065 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00002066 struct netlink_dump_control c = {
2067 .dump = ctnetlink_exp_dump_table,
2068 .done = ctnetlink_exp_done,
2069 };
2070 return netlink_dump_start(ctnl, skb, nlh, &c);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002071 }
2072
Patrick McHardyef00f892010-02-15 18:14:57 +01002073 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2074 if (err < 0)
2075 return err;
2076
Pablo Neira Ayuso35dba1d2011-12-14 12:45:22 +01002077 if (cda[CTA_EXPECT_TUPLE])
2078 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2079 else if (cda[CTA_EXPECT_MASTER])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002080 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2081 else
2082 return -EINVAL;
2083
2084 if (err < 0)
2085 return err;
2086
Patrick McHardyef00f892010-02-15 18:14:57 +01002087 exp = nf_ct_expect_find_get(net, zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002088 if (!exp)
2089 return -ENOENT;
2090
Patrick McHardydf6fb862007-09-28 14:37:03 -07002091 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08002092 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07002093 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07002094 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002095 return -ENOENT;
2096 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002097 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002098
2099 err = -ENOMEM;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002100 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002101 if (skb2 == NULL) {
2102 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002103 goto out;
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002104 }
Thomas Graf4e9b8262006-11-27 09:25:58 -08002105
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002106 rcu_read_lock();
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002107 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid,
Pablo Neira Ayuso8b0a2312009-06-02 20:03:34 +02002108 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
Pablo Neira Ayuso528a3a62008-11-17 16:00:40 +01002109 rcu_read_unlock();
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002110 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002111 if (err <= 0)
2112 goto free;
2113
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002114 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
2115 if (err < 0)
2116 goto out;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002117
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002118 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002119
2120free:
2121 kfree_skb(skb2);
2122out:
Pablo Neira Ayuso81378f72011-12-24 19:03:46 +01002123 /* this avoids a loop in nfnetlink. */
2124 return err == -EAGAIN ? -ENOBUFS : err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002125}
2126
2127static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002128ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02002129 const struct nlmsghdr *nlh,
2130 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002131{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002132 struct net *net = sock_net(ctnl);
Patrick McHardy31f15872007-07-07 22:35:21 -07002133 struct nf_conntrack_expect *exp;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002134 struct nf_conntrack_tuple tuple;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002135 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Patrick McHardy31f15872007-07-07 22:35:21 -07002136 struct hlist_node *n, *next;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002137 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardy31f15872007-07-07 22:35:21 -07002138 unsigned int i;
Patrick McHardyef00f892010-02-15 18:14:57 +01002139 u16 zone;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002140 int err;
2141
Patrick McHardydf6fb862007-09-28 14:37:03 -07002142 if (cda[CTA_EXPECT_TUPLE]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002143 /* delete a single expect by tuple */
Patrick McHardyef00f892010-02-15 18:14:57 +01002144 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2145 if (err < 0)
2146 return err;
2147
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002148 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2149 if (err < 0)
2150 return err;
2151
2152 /* bump usage count to 2 */
Patrick McHardyef00f892010-02-15 18:14:57 +01002153 exp = nf_ct_expect_find_get(net, zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002154 if (!exp)
2155 return -ENOENT;
2156
Patrick McHardydf6fb862007-09-28 14:37:03 -07002157 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08002158 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07002159 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07002160 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002161 return -ENOENT;
2162 }
2163 }
2164
2165 /* after list removal, usage count == 1 */
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002166 spin_lock_bh(&nf_conntrack_lock);
2167 if (del_timer(&exp->timeout)) {
2168 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).pid,
2169 nlmsg_report(nlh));
2170 nf_ct_expect_put(exp);
2171 }
2172 spin_unlock_bh(&nf_conntrack_lock);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002173 /* have to put what we 'get' above.
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002174 * after this line usage count == 0 */
Patrick McHardy68236452007-07-07 22:30:49 -07002175 nf_ct_expect_put(exp);
Patrick McHardydf6fb862007-09-28 14:37:03 -07002176 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2177 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
Patrick McHardy31f15872007-07-07 22:35:21 -07002178 struct nf_conn_help *m_help;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002179
2180 /* delete all expectations for this helper */
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002181 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy31f15872007-07-07 22:35:21 -07002182 for (i = 0; i < nf_ct_expect_hsize; i++) {
2183 hlist_for_each_entry_safe(exp, n, next,
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002184 &net->ct.expect_hash[i],
Patrick McHardy31f15872007-07-07 22:35:21 -07002185 hnode) {
2186 m_help = nfct_help(exp->master);
Patrick McHardy794e6872010-02-03 13:41:29 +01002187 if (!strcmp(m_help->helper->name, name) &&
2188 del_timer(&exp->timeout)) {
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002189 nf_ct_unlink_expect_report(exp,
2190 NETLINK_CB(skb).pid,
2191 nlmsg_report(nlh));
Patrick McHardy31f15872007-07-07 22:35:21 -07002192 nf_ct_expect_put(exp);
2193 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002194 }
2195 }
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002196 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002197 } else {
2198 /* This basically means we have to flush everything*/
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002199 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy31f15872007-07-07 22:35:21 -07002200 for (i = 0; i < nf_ct_expect_hsize; i++) {
2201 hlist_for_each_entry_safe(exp, n, next,
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002202 &net->ct.expect_hash[i],
Patrick McHardy31f15872007-07-07 22:35:21 -07002203 hnode) {
2204 if (del_timer(&exp->timeout)) {
Pablo Neira Ayusoebbf41d2010-10-19 10:19:06 +02002205 nf_ct_unlink_expect_report(exp,
2206 NETLINK_CB(skb).pid,
2207 nlmsg_report(nlh));
Patrick McHardy31f15872007-07-07 22:35:21 -07002208 nf_ct_expect_put(exp);
2209 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002210 }
2211 }
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002212 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002213 }
2214
2215 return 0;
2216}
2217static int
Patrick McHardy39938322009-08-25 16:07:58 +02002218ctnetlink_change_expect(struct nf_conntrack_expect *x,
2219 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002220{
Kelvie Wong9768e1a2012-05-02 14:39:24 +00002221 if (cda[CTA_EXPECT_TIMEOUT]) {
2222 if (!del_timer(&x->timeout))
2223 return -ETIME;
2224
2225 x->timeout.expires = jiffies +
2226 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2227 add_timer(&x->timeout);
2228 }
2229 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002230}
2231
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002232static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2233 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2234 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2235};
2236
2237static int
2238ctnetlink_parse_expect_nat(const struct nlattr *attr,
2239 struct nf_conntrack_expect *exp,
2240 u_int8_t u3)
2241{
2242#ifdef CONFIG_NF_NAT_NEEDED
2243 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2244 struct nf_conntrack_tuple nat_tuple = {};
2245 int err;
2246
2247 nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2248
2249 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2250 return -EINVAL;
2251
2252 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2253 &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3);
2254 if (err < 0)
2255 return err;
2256
2257 exp->saved_ip = nat_tuple.src.u3.ip;
2258 exp->saved_proto = nat_tuple.src.u;
2259 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2260
2261 return 0;
2262#else
2263 return -EOPNOTSUPP;
2264#endif
2265}
2266
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002267static int
Patrick McHardyef00f892010-02-15 18:14:57 +01002268ctnetlink_create_expect(struct net *net, u16 zone,
2269 const struct nlattr * const cda[],
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002270 u_int8_t u3,
Patrick McHardy39938322009-08-25 16:07:58 +02002271 u32 pid, int report)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002272{
2273 struct nf_conntrack_tuple tuple, mask, master_tuple;
2274 struct nf_conntrack_tuple_hash *h = NULL;
2275 struct nf_conntrack_expect *exp;
2276 struct nf_conn *ct;
Harald Weltedc808fe2006-03-20 17:56:32 -08002277 struct nf_conn_help *help;
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01002278 struct nf_conntrack_helper *helper = NULL;
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002279 u_int32_t class = 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002280 int err = 0;
2281
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002282 /* caller guarantees that those three CTA_EXPECT_* exist */
2283 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2284 if (err < 0)
2285 return err;
2286 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
2287 if (err < 0)
2288 return err;
2289 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
2290 if (err < 0)
2291 return err;
2292
2293 /* Look for master conntrack of this expectation */
Patrick McHardyef00f892010-02-15 18:14:57 +01002294 h = nf_conntrack_find_get(net, zone, &master_tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002295 if (!h)
2296 return -ENOENT;
2297 ct = nf_ct_tuplehash_to_ctrack(h);
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01002298
2299 /* Look for helper of this expectation */
2300 if (cda[CTA_EXPECT_HELP_NAME]) {
2301 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2302
2303 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2304 nf_ct_protonum(ct));
2305 if (helper == NULL) {
2306#ifdef CONFIG_MODULES
2307 if (request_module("nfct-helper-%s", helpname) < 0) {
2308 err = -EOPNOTSUPP;
2309 goto out;
2310 }
2311
2312 helper = __nf_conntrack_helper_find(helpname,
2313 nf_ct_l3num(ct),
2314 nf_ct_protonum(ct));
2315 if (helper) {
2316 err = -EAGAIN;
2317 goto out;
2318 }
2319#endif
2320 err = -EOPNOTSUPP;
2321 goto out;
2322 }
2323 }
2324
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002325 if (cda[CTA_EXPECT_CLASS] && helper) {
2326 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
2327 if (class > helper->expect_class_max) {
2328 err = -EINVAL;
2329 goto out;
2330 }
2331 }
Patrick McHardy68236452007-07-07 22:30:49 -07002332 exp = nf_ct_expect_alloc(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002333 if (!exp) {
2334 err = -ENOMEM;
2335 goto out;
2336 }
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002337 help = nfct_help(ct);
2338 if (!help) {
2339 if (!cda[CTA_EXPECT_TIMEOUT]) {
2340 err = -EINVAL;
2341 goto out;
2342 }
2343 exp->timeout.expires =
2344 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002345
Pablo Neira Ayusobc01befd2010-09-28 21:06:34 +02002346 exp->flags = NF_CT_EXPECT_USERSPACE;
2347 if (cda[CTA_EXPECT_FLAGS]) {
2348 exp->flags |=
2349 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2350 }
2351 } else {
2352 if (cda[CTA_EXPECT_FLAGS]) {
2353 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2354 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
2355 } else
2356 exp->flags = 0;
2357 }
Pablo Neira Ayuso544d5c72012-02-05 03:44:51 +01002358 if (cda[CTA_EXPECT_FN]) {
2359 const char *name = nla_data(cda[CTA_EXPECT_FN]);
2360 struct nf_ct_helper_expectfn *expfn;
2361
2362 expfn = nf_ct_helper_expectfn_find_by_name(name);
2363 if (expfn == NULL) {
2364 err = -EINVAL;
2365 goto err_out;
2366 }
2367 exp->expectfn = expfn->expectfn;
2368 } else
2369 exp->expectfn = NULL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002370
Pablo Neira Ayusob8c5e522012-02-05 03:21:12 +01002371 exp->class = class;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002372 exp->master = ct;
Pablo Neira Ayuso660fdb22012-02-05 02:34:16 +01002373 exp->helper = helper;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002374 memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
Patrick McHardyd4156e82007-07-07 22:31:32 -07002375 memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
2376 exp->mask.src.u.all = mask.src.u.all;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002377
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002378 if (cda[CTA_EXPECT_NAT]) {
2379 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
2380 exp, u3);
2381 if (err < 0)
2382 goto err_out;
2383 }
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01002384 err = nf_ct_expect_related_report(exp, pid, report);
Pablo Neira Ayuso076a0ca2012-02-05 03:41:52 +01002385err_out:
Patrick McHardy68236452007-07-07 22:30:49 -07002386 nf_ct_expect_put(exp);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08002387out:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002388 nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
2389 return err;
2390}
2391
2392static int
2393ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardy39938322009-08-25 16:07:58 +02002394 const struct nlmsghdr *nlh,
2395 const struct nlattr * const cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002396{
Alexey Dobriyan9592a5c2010-01-13 16:04:18 +01002397 struct net *net = sock_net(ctnl);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002398 struct nf_conntrack_tuple tuple;
2399 struct nf_conntrack_expect *exp;
Pablo Neira Ayuso96bcf932009-06-02 20:07:39 +02002400 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002401 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardyef00f892010-02-15 18:14:57 +01002402 u16 zone;
2403 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002404
Patrick McHardydf6fb862007-09-28 14:37:03 -07002405 if (!cda[CTA_EXPECT_TUPLE]
2406 || !cda[CTA_EXPECT_MASK]
2407 || !cda[CTA_EXPECT_MASTER])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002408 return -EINVAL;
2409
Patrick McHardyef00f892010-02-15 18:14:57 +01002410 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2411 if (err < 0)
2412 return err;
2413
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002414 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2415 if (err < 0)
2416 return err;
2417
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002418 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardyef00f892010-02-15 18:14:57 +01002419 exp = __nf_ct_expect_find(net, zone, &tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002420
2421 if (!exp) {
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002422 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002423 err = -ENOENT;
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01002424 if (nlh->nlmsg_flags & NLM_F_CREATE) {
Patrick McHardyef00f892010-02-15 18:14:57 +01002425 err = ctnetlink_create_expect(net, zone, cda,
Pablo Neira Ayuso19abb7b2008-11-18 11:56:20 +01002426 u3,
2427 NETLINK_CB(skb).pid,
2428 nlmsg_report(nlh));
2429 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002430 return err;
2431 }
2432
2433 err = -EEXIST;
2434 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
2435 err = ctnetlink_change_expect(exp, cda);
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08002436 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002437
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002438 return err;
2439}
2440
2441#ifdef CONFIG_NF_CONNTRACK_EVENTS
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002442static struct nf_ct_event_notifier ctnl_notifier = {
2443 .fcn = ctnetlink_conntrack_event,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002444};
2445
Pablo Neira Ayusoe34d5c12009-06-03 10:32:06 +02002446static struct nf_exp_event_notifier ctnl_notifier_exp = {
2447 .fcn = ctnetlink_expect_event,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002448};
2449#endif
2450
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002451static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002452 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002453 .attr_count = CTA_MAX,
2454 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002455 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002456 .attr_count = CTA_MAX,
2457 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002458 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002459 .attr_count = CTA_MAX,
2460 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002461 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002462 .attr_count = CTA_MAX,
2463 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002464};
2465
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002466static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002467 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002468 .attr_count = CTA_EXPECT_MAX,
2469 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002470 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002471 .attr_count = CTA_EXPECT_MAX,
2472 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002473 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07002474 .attr_count = CTA_EXPECT_MAX,
2475 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002476};
2477
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002478static const struct nfnetlink_subsystem ctnl_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002479 .name = "conntrack",
2480 .subsys_id = NFNL_SUBSYS_CTNETLINK,
2481 .cb_count = IPCTNL_MSG_MAX,
2482 .cb = ctnl_cb,
2483};
2484
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07002485static const struct nfnetlink_subsystem ctnl_exp_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002486 .name = "conntrack_expect",
2487 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
2488 .cb_count = IPCTNL_MSG_EXP_MAX,
2489 .cb = ctnl_exp_cb,
2490};
2491
Patrick McHardyd2483dd2006-12-02 22:06:05 -08002492MODULE_ALIAS("ip_conntrack_netlink");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002493MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
Pablo Neira Ayuso34f9a2e2006-02-04 02:11:41 -08002494MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002495
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01002496static int __net_init ctnetlink_net_init(struct net *net)
2497{
2498#ifdef CONFIG_NF_CONNTRACK_EVENTS
2499 int ret;
2500
2501 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
2502 if (ret < 0) {
2503 pr_err("ctnetlink_init: cannot register notifier.\n");
2504 goto err_out;
2505 }
2506
2507 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
2508 if (ret < 0) {
2509 pr_err("ctnetlink_init: cannot expect register notifier.\n");
2510 goto err_unreg_notifier;
2511 }
2512#endif
2513 return 0;
2514
2515#ifdef CONFIG_NF_CONNTRACK_EVENTS
2516err_unreg_notifier:
2517 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2518err_out:
2519 return ret;
2520#endif
2521}
2522
2523static void ctnetlink_net_exit(struct net *net)
2524{
2525#ifdef CONFIG_NF_CONNTRACK_EVENTS
2526 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
2527 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2528#endif
2529}
2530
2531static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
2532{
2533 struct net *net;
2534
2535 list_for_each_entry(net, net_exit_list, exit_list)
2536 ctnetlink_net_exit(net);
2537}
2538
2539static struct pernet_operations ctnetlink_net_ops = {
2540 .init = ctnetlink_net_init,
2541 .exit_batch = ctnetlink_net_exit_batch,
2542};
2543
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002544static int __init ctnetlink_init(void)
2545{
2546 int ret;
2547
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002548 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002549 ret = nfnetlink_subsys_register(&ctnl_subsys);
2550 if (ret < 0) {
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002551 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002552 goto err_out;
2553 }
2554
2555 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
2556 if (ret < 0) {
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002557 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002558 goto err_unreg_subsys;
2559 }
2560
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01002561 if (register_pernet_subsys(&ctnetlink_net_ops)) {
2562 pr_err("ctnetlink_init: cannot register pernet operations\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002563 goto err_unreg_exp_subsys;
2564 }
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002565#if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \
2566 defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE)
2567 /* setup interaction between nf_queue and nf_conntrack_netlink. */
2568 RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook);
2569#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002570 return 0;
2571
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002572err_unreg_exp_subsys:
2573 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002574err_unreg_subsys:
2575 nfnetlink_subsys_unregister(&ctnl_subsys);
2576err_out:
2577 return ret;
2578}
2579
2580static void __exit ctnetlink_exit(void)
2581{
Stephen Hemminger654d0fb2010-05-13 15:02:08 +02002582 pr_info("ctnetlink: unregistering from nfnetlink.\n");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002583
Pablo Neira Ayuso70e99422011-11-22 00:16:51 +01002584 unregister_pernet_subsys(&ctnetlink_net_ops);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002585 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
2586 nfnetlink_subsys_unregister(&ctnl_subsys);
Pablo Neira Ayuso9cb01762012-06-07 12:13:39 +02002587#if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \
2588 defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE)
2589 RCU_INIT_POINTER(nfq_ct_hook, NULL);
2590#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08002591}
2592
2593module_init(ctnetlink_init);
2594module_exit(ctnetlink_exit);