blob: 13918c1fbf6675a05fc2822ae7042af649a39227 [file] [log] [blame]
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001/* Connection tracking via netlink socket. Allows for user space
2 * protocol helpers and general trouble making from userspace.
3 *
4 * (C) 2001 by Jay Schulist <jschlst@samba.org>
Harald Weltedc808fe2006-03-20 17:56:32 -08005 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08006 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07007 * (C) 2005-2008 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>
21#include <linux/types.h>
22#include <linux/timer.h>
23#include <linux/skbuff.h>
24#include <linux/errno.h>
25#include <linux/netlink.h>
26#include <linux/spinlock.h>
Yasuyuki Kozakai40a839f2006-06-27 03:00:35 -070027#include <linux/interrupt.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080028#include <linux/notifier.h>
29
30#include <linux/netfilter.h>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070031#include <net/netlink.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080032#include <net/netfilter/nf_conntrack.h>
33#include <net/netfilter/nf_conntrack_core.h>
Martin Josefsson77ab9cf2006-11-29 02:34:58 +010034#include <net/netfilter/nf_conntrack_expect.h>
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080035#include <net/netfilter/nf_conntrack_helper.h>
36#include <net/netfilter/nf_conntrack_l3proto.h>
Martin Josefsson605dcad2006-11-29 02:35:06 +010037#include <net/netfilter/nf_conntrack_l4proto.h>
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -080038#include <net/netfilter/nf_conntrack_tuple.h>
39#ifdef CONFIG_NF_NAT_NEEDED
40#include <net/netfilter/nf_nat_core.h>
41#include <net/netfilter/nf_nat_protocol.h>
42#endif
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080043
44#include <linux/netfilter/nfnetlink.h>
45#include <linux/netfilter/nfnetlink_conntrack.h>
46
47MODULE_LICENSE("GPL");
48
Harald Weltedc808fe2006-03-20 17:56:32 -080049static char __initdata version[] = "0.93";
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080050
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080051static inline int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -080052ctnetlink_dump_tuples_proto(struct sk_buff *skb,
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -080053 const struct nf_conntrack_tuple *tuple,
Martin Josefsson605dcad2006-11-29 02:35:06 +010054 struct nf_conntrack_l4proto *l4proto)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080055{
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080056 int ret = 0;
Patrick McHardydf6fb862007-09-28 14:37:03 -070057 struct nlattr *nest_parms;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080058
Patrick McHardydf6fb862007-09-28 14:37:03 -070059 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
60 if (!nest_parms)
61 goto nla_put_failure;
Patrick McHardy77236b62007-12-17 22:29:45 -080062 NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080063
Patrick McHardyfdf70832007-09-28 14:37:41 -070064 if (likely(l4proto->tuple_to_nlattr))
65 ret = l4proto->tuple_to_nlattr(skb, tuple);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -080066
Patrick McHardydf6fb862007-09-28 14:37:03 -070067 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080068
69 return ret;
70
Patrick McHardydf6fb862007-09-28 14:37:03 -070071nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080072 return -1;
73}
74
75static inline int
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -080076ctnetlink_dump_tuples_ip(struct sk_buff *skb,
77 const struct nf_conntrack_tuple *tuple,
78 struct nf_conntrack_l3proto *l3proto)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080079{
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080080 int ret = 0;
Patrick McHardydf6fb862007-09-28 14:37:03 -070081 struct nlattr *nest_parms;
82
83 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
84 if (!nest_parms)
85 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -080086
Patrick McHardyfdf70832007-09-28 14:37:41 -070087 if (likely(l3proto->tuple_to_nlattr))
88 ret = l3proto->tuple_to_nlattr(skb, tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080089
Patrick McHardydf6fb862007-09-28 14:37:03 -070090 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080091
92 return ret;
93
Patrick McHardydf6fb862007-09-28 14:37:03 -070094nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -080095 return -1;
96}
97
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -080098static int
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -080099ctnetlink_dump_tuples(struct sk_buff *skb,
100 const struct nf_conntrack_tuple *tuple)
101{
102 int ret;
103 struct nf_conntrack_l3proto *l3proto;
Martin Josefsson605dcad2006-11-29 02:35:06 +0100104 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800105
106 l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
107 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
108 nf_ct_l3proto_put(l3proto);
109
110 if (unlikely(ret < 0))
111 return ret;
112
Martin Josefsson605dcad2006-11-29 02:35:06 +0100113 l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum);
114 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
115 nf_ct_l4proto_put(l4proto);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -0800116
117 return ret;
118}
119
120static inline int
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800121ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
122{
Patrick McHardy77236b62007-12-17 22:29:45 -0800123 NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800124 return 0;
125
Patrick McHardydf6fb862007-09-28 14:37:03 -0700126nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800127 return -1;
128}
129
130static inline int
131ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
132{
Patrick McHardy77236b62007-12-17 22:29:45 -0800133 long timeout = (ct->timeout.expires - jiffies) / HZ;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800134
Patrick McHardy77236b62007-12-17 22:29:45 -0800135 if (timeout < 0)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800136 timeout = 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800137
Patrick McHardy77236b62007-12-17 22:29:45 -0800138 NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800139 return 0;
140
Patrick McHardydf6fb862007-09-28 14:37:03 -0700141nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800142 return -1;
143}
144
145static inline int
146ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct)
147{
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200148 struct nf_conntrack_l4proto *l4proto;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700149 struct nlattr *nest_proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800150 int ret;
151
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200152 l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct));
Patrick McHardyfdf70832007-09-28 14:37:41 -0700153 if (!l4proto->to_nlattr) {
Martin Josefsson605dcad2006-11-29 02:35:06 +0100154 nf_ct_l4proto_put(l4proto);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800155 return 0;
156 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800157
Patrick McHardydf6fb862007-09-28 14:37:03 -0700158 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
159 if (!nest_proto)
160 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800161
Patrick McHardyfdf70832007-09-28 14:37:41 -0700162 ret = l4proto->to_nlattr(skb, nest_proto, ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800163
Martin Josefsson605dcad2006-11-29 02:35:06 +0100164 nf_ct_l4proto_put(l4proto);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800165
Patrick McHardydf6fb862007-09-28 14:37:03 -0700166 nla_nest_end(skb, nest_proto);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800167
168 return ret;
169
Patrick McHardydf6fb862007-09-28 14:37:03 -0700170nla_put_failure:
Martin Josefsson605dcad2006-11-29 02:35:06 +0100171 nf_ct_l4proto_put(l4proto);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800172 return -1;
173}
174
175static inline int
176ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
177{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700178 struct nlattr *nest_helper;
Harald Weltedc808fe2006-03-20 17:56:32 -0800179 const struct nf_conn_help *help = nfct_help(ct);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700180 struct nf_conntrack_helper *helper;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800181
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700182 if (!help)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800183 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800184
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700185 rcu_read_lock();
186 helper = rcu_dereference(help->helper);
187 if (!helper)
188 goto out;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800189
Patrick McHardydf6fb862007-09-28 14:37:03 -0700190 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
191 if (!nest_helper)
192 goto nla_put_failure;
Patrick McHardy77236b62007-12-17 22:29:45 -0800193 NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700194
Patrick McHardyfdf70832007-09-28 14:37:41 -0700195 if (helper->to_nlattr)
196 helper->to_nlattr(skb, ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800197
Patrick McHardydf6fb862007-09-28 14:37:03 -0700198 nla_nest_end(skb, nest_helper);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700199out:
200 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800201 return 0;
202
Patrick McHardydf6fb862007-09-28 14:37:03 -0700203nla_put_failure:
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700204 rcu_read_unlock();
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800205 return -1;
206}
207
208#ifdef CONFIG_NF_CT_ACCT
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800209static int
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800210ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
211 enum ip_conntrack_dir dir)
212{
213 enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700214 struct nlattr *nest_count;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800215
Patrick McHardydf6fb862007-09-28 14:37:03 -0700216 nest_count = nla_nest_start(skb, type | NLA_F_NESTED);
217 if (!nest_count)
218 goto nla_put_failure;
219
Patrick McHardy77236b62007-12-17 22:29:45 -0800220 NLA_PUT_BE32(skb, CTA_COUNTERS32_PACKETS,
221 htonl(ct->counters[dir].packets));
222 NLA_PUT_BE32(skb, CTA_COUNTERS32_BYTES,
223 htonl(ct->counters[dir].bytes));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800224
Patrick McHardydf6fb862007-09-28 14:37:03 -0700225 nla_nest_end(skb, nest_count);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800226
227 return 0;
228
Patrick McHardydf6fb862007-09-28 14:37:03 -0700229nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800230 return -1;
231}
232#else
233#define ctnetlink_dump_counters(a, b, c) (0)
234#endif
235
236#ifdef CONFIG_NF_CONNTRACK_MARK
237static inline int
238ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
239{
Patrick McHardy77236b62007-12-17 22:29:45 -0800240 NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800241 return 0;
242
Patrick McHardydf6fb862007-09-28 14:37:03 -0700243nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800244 return -1;
245}
246#else
247#define ctnetlink_dump_mark(a, b) (0)
248#endif
249
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800250#ifdef CONFIG_NF_CONNTRACK_SECMARK
251static inline int
252ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct)
253{
Patrick McHardy77236b62007-12-17 22:29:45 -0800254 NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark));
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800255 return 0;
256
257nla_put_failure:
258 return -1;
259}
260#else
261#define ctnetlink_dump_secmark(a, b) (0)
262#endif
263
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800264#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
265
266static inline int
267ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
268{
269 struct nlattr *nest_parms;
270
271 if (!(ct->status & IPS_EXPECTED))
272 return 0;
273
274 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
275 if (!nest_parms)
276 goto nla_put_failure;
277 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
278 goto nla_put_failure;
279 nla_nest_end(skb, nest_parms);
280
281 return 0;
282
283nla_put_failure:
284 return -1;
285}
286
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800287#ifdef CONFIG_NF_NAT_NEEDED
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800288static int
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800289dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type)
290{
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800291 struct nlattr *nest_parms;
292
293 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
294 if (!nest_parms)
295 goto nla_put_failure;
296
Patrick McHardy77236b62007-12-17 22:29:45 -0800297 NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS,
298 htonl(natseq->correction_pos));
299 NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE,
300 htonl(natseq->offset_before));
301 NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER,
302 htonl(natseq->offset_after));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800303
304 nla_nest_end(skb, nest_parms);
305
306 return 0;
307
308nla_put_failure:
309 return -1;
310}
311
312static inline int
313ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
314{
315 struct nf_nat_seq *natseq;
316 struct nf_conn_nat *nat = nfct_nat(ct);
317
318 if (!(ct->status & IPS_SEQ_ADJUST) || !nat)
319 return 0;
320
321 natseq = &nat->seq[IP_CT_DIR_ORIGINAL];
322 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1)
323 return -1;
324
325 natseq = &nat->seq[IP_CT_DIR_REPLY];
326 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1)
327 return -1;
328
329 return 0;
330}
331#else
332#define ctnetlink_dump_nat_seq_adj(a, b) (0)
333#endif
334
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800335static inline int
336ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
337{
Patrick McHardy77236b62007-12-17 22:29:45 -0800338 NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800339 return 0;
340
Patrick McHardydf6fb862007-09-28 14:37:03 -0700341nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800342 return -1;
343}
344
345static inline int
346ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
347{
Patrick McHardy77236b62007-12-17 22:29:45 -0800348 NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800349 return 0;
350
Patrick McHardydf6fb862007-09-28 14:37:03 -0700351nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800352 return -1;
353}
354
355#define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple)
356
357static int
358ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800359 int event, int nowait,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800360 const struct nf_conn *ct)
361{
362 struct nlmsghdr *nlh;
363 struct nfgenmsg *nfmsg;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700364 struct nlattr *nest_parms;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700365 unsigned char *b = skb_tail_pointer(skb);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800366
367 event |= NFNL_SUBSYS_CTNETLINK << 8;
368 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
369 nfmsg = NLMSG_DATA(nlh);
370
371 nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0;
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200372 nfmsg->nfgen_family = nf_ct_l3num(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800373 nfmsg->version = NFNETLINK_V0;
374 nfmsg->res_id = 0;
375
Patrick McHardydf6fb862007-09-28 14:37:03 -0700376 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
377 if (!nest_parms)
378 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800379 if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700380 goto nla_put_failure;
381 nla_nest_end(skb, nest_parms);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800382
Patrick McHardydf6fb862007-09-28 14:37:03 -0700383 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
384 if (!nest_parms)
385 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800386 if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700387 goto nla_put_failure;
388 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800389
390 if (ctnetlink_dump_status(skb, ct) < 0 ||
391 ctnetlink_dump_timeout(skb, ct) < 0 ||
392 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
393 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 ||
394 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
395 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
396 ctnetlink_dump_mark(skb, ct) < 0 ||
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800397 ctnetlink_dump_secmark(skb, ct) < 0 ||
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800398 ctnetlink_dump_id(skb, ct) < 0 ||
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800399 ctnetlink_dump_use(skb, ct) < 0 ||
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800400 ctnetlink_dump_master(skb, ct) < 0 ||
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800401 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700402 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800403
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700404 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800405 return skb->len;
406
407nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -0700408nla_put_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700409 nlmsg_trim(skb, b);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800410 return -1;
411}
412
413#ifdef CONFIG_NF_CONNTRACK_EVENTS
414static int ctnetlink_conntrack_event(struct notifier_block *this,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800415 unsigned long events, void *ptr)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800416{
417 struct nlmsghdr *nlh;
418 struct nfgenmsg *nfmsg;
Patrick McHardydf6fb862007-09-28 14:37:03 -0700419 struct nlattr *nest_parms;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800420 struct nf_conn *ct = (struct nf_conn *)ptr;
421 struct sk_buff *skb;
422 unsigned int type;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700423 sk_buff_data_t b;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800424 unsigned int flags = 0, group;
425
426 /* ignore our fake conntrack entry */
427 if (ct == &nf_conntrack_untracked)
428 return NOTIFY_DONE;
429
430 if (events & IPCT_DESTROY) {
431 type = IPCTNL_MSG_CT_DELETE;
432 group = NFNLGRP_CONNTRACK_DESTROY;
433 } else if (events & (IPCT_NEW | IPCT_RELATED)) {
434 type = IPCTNL_MSG_CT_NEW;
435 flags = NLM_F_CREATE|NLM_F_EXCL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800436 group = NFNLGRP_CONNTRACK_NEW;
Pablo Neira Ayuso1a315262006-08-22 00:32:23 -0700437 } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800438 type = IPCTNL_MSG_CT_NEW;
439 group = NFNLGRP_CONNTRACK_UPDATE;
440 } else
441 return NOTIFY_DONE;
Patrick McHardya2427692006-03-20 18:03:59 -0800442
443 if (!nfnetlink_has_listeners(group))
444 return NOTIFY_DONE;
445
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800446 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
447 if (!skb)
448 return NOTIFY_DONE;
449
450 b = skb->tail;
451
452 type |= NFNL_SUBSYS_CTNETLINK << 8;
453 nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg));
454 nfmsg = NLMSG_DATA(nlh);
455
456 nlh->nlmsg_flags = flags;
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200457 nfmsg->nfgen_family = nf_ct_l3num(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800458 nfmsg->version = NFNETLINK_V0;
459 nfmsg->res_id = 0;
460
Patrick McHardydf6fb862007-09-28 14:37:03 -0700461 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
462 if (!nest_parms)
463 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800464 if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700465 goto nla_put_failure;
466 nla_nest_end(skb, nest_parms);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800467
Patrick McHardydf6fb862007-09-28 14:37:03 -0700468 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
469 if (!nest_parms)
470 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800471 if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700472 goto nla_put_failure;
473 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800474
Eric Leblond1eedf692008-05-13 23:27:11 -0700475 if (ctnetlink_dump_id(skb, ct) < 0)
476 goto nla_put_failure;
477
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100478 if (events & IPCT_DESTROY) {
479 if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
480 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700481 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100482 } else {
483 if (ctnetlink_dump_status(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700484 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800485
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100486 if (ctnetlink_dump_timeout(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700487 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100488
489 if (events & IPCT_PROTOINFO
490 && ctnetlink_dump_protoinfo(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700491 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100492
493 if ((events & IPCT_HELPER || nfct_help(ct))
494 && ctnetlink_dump_helpinfo(skb, ct) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -0700495 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100496
Pablo Neira Ayuso37fccd82007-12-17 22:28:41 -0800497#ifdef CONFIG_NF_CONNTRACK_SECMARK
498 if ((events & IPCT_SECMARK || ct->secmark)
499 && ctnetlink_dump_secmark(skb, ct) < 0)
500 goto nla_put_failure;
501#endif
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100502
503 if (events & IPCT_COUNTER_FILLING &&
504 (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
505 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0))
Patrick McHardydf6fb862007-09-28 14:37:03 -0700506 goto nla_put_failure;
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800507
Pablo Neira Ayuso0f417ce2007-12-17 22:28:19 -0800508 if (events & IPCT_RELATED &&
509 ctnetlink_dump_master(skb, ct) < 0)
510 goto nla_put_failure;
511
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -0800512 if (events & IPCT_NATSEQADJ &&
513 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
514 goto nla_put_failure;
Pablo Neira Ayuso7b621c12006-11-29 02:35:32 +0100515 }
Pablo Neira Ayusob9a37e02006-08-22 00:31:49 -0700516
Eric Leblonda83099a2008-01-31 04:44:27 -0800517#ifdef CONFIG_NF_CONNTRACK_MARK
518 if ((events & IPCT_MARK || ct->mark)
519 && ctnetlink_dump_mark(skb, ct) < 0)
520 goto nla_put_failure;
521#endif
522
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800523 nlh->nlmsg_len = skb->tail - b;
524 nfnetlink_send(skb, 0, group, 0);
525 return NOTIFY_DONE;
526
527nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -0700528nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800529 kfree_skb(skb);
530 return NOTIFY_DONE;
531}
532#endif /* CONFIG_NF_CONNTRACK_EVENTS */
533
534static int ctnetlink_done(struct netlink_callback *cb)
535{
Patrick McHardy89f2e212006-05-29 18:24:58 -0700536 if (cb->args[1])
537 nf_ct_put((struct nf_conn *)cb->args[1]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800538 return 0;
539}
540
541static int
542ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
543{
Patrick McHardy89f2e212006-05-29 18:24:58 -0700544 struct nf_conn *ct, *last;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800545 struct nf_conntrack_tuple_hash *h;
Patrick McHardyf205c5e2007-07-07 22:28:14 -0700546 struct hlist_node *n;
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -0800547 struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
548 u_int8_t l3proto = nfmsg->nfgen_family;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800549
Patrick McHardy76507f62008-01-31 04:38:38 -0800550 rcu_read_lock();
Patrick McHardyd205dc42006-08-17 18:12:38 -0700551 last = (struct nf_conn *)cb->args[1];
Patrick McHardy89f2e212006-05-29 18:24:58 -0700552 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
553restart:
Patrick McHardy76507f62008-01-31 04:38:38 -0800554 hlist_for_each_entry_rcu(h, n, &nf_conntrack_hash[cb->args[0]],
555 hnode) {
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800556 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800557 continue;
558 ct = nf_ct_tuplehash_to_ctrack(h);
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -0800559 /* Dump entries of a given L3 protocol number.
560 * If it is not specified, ie. l3proto == 0,
561 * then dump everything. */
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200562 if (l3proto && nf_ct_l3num(ct) != l3proto)
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -0800563 continue;
Patrick McHardyd205dc42006-08-17 18:12:38 -0700564 if (cb->args[1]) {
565 if (ct != last)
Patrick McHardy89f2e212006-05-29 18:24:58 -0700566 continue;
Patrick McHardyd205dc42006-08-17 18:12:38 -0700567 cb->args[1] = 0;
Patrick McHardy89f2e212006-05-29 18:24:58 -0700568 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800569 if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800570 cb->nlh->nlmsg_seq,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800571 IPCTNL_MSG_CT_NEW,
Patrick McHardy89f2e212006-05-29 18:24:58 -0700572 1, ct) < 0) {
Patrick McHardy76507f62008-01-31 04:38:38 -0800573 if (!atomic_inc_not_zero(&ct->ct_general.use))
574 continue;
Patrick McHardy89f2e212006-05-29 18:24:58 -0700575 cb->args[1] = (unsigned long)ct;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800576 goto out;
Patrick McHardy89f2e212006-05-29 18:24:58 -0700577 }
Pablo Neira Ayuso01f34842006-09-20 12:00:45 -0700578#ifdef CONFIG_NF_CT_ACCT
579 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) ==
580 IPCTNL_MSG_CT_GET_CTRZERO)
581 memset(&ct->counters, 0, sizeof(ct->counters));
582#endif
Patrick McHardy89f2e212006-05-29 18:24:58 -0700583 }
Patrick McHardyd205dc42006-08-17 18:12:38 -0700584 if (cb->args[1]) {
Patrick McHardy89f2e212006-05-29 18:24:58 -0700585 cb->args[1] = 0;
586 goto restart;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800587 }
588 }
Patrick McHardy89f2e212006-05-29 18:24:58 -0700589out:
Patrick McHardy76507f62008-01-31 04:38:38 -0800590 rcu_read_unlock();
Patrick McHardyd205dc42006-08-17 18:12:38 -0700591 if (last)
592 nf_ct_put(last);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800593
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800594 return skb->len;
595}
596
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800597static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700598ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800599{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700600 struct nlattr *tb[CTA_IP_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800601 struct nf_conntrack_l3proto *l3proto;
602 int ret = 0;
603
Patrick McHardydf6fb862007-09-28 14:37:03 -0700604 nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800605
606 l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
607
Patrick McHardyf73e9242007-09-28 14:39:55 -0700608 if (likely(l3proto->nlattr_to_tuple)) {
609 ret = nla_validate_nested(attr, CTA_IP_MAX,
610 l3proto->nla_policy);
611 if (ret == 0)
612 ret = l3proto->nlattr_to_tuple(tb, tuple);
613 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800614
615 nf_ct_l3proto_put(l3proto);
616
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800617 return ret;
618}
619
Patrick McHardyf73e9242007-09-28 14:39:55 -0700620static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
621 [CTA_PROTO_NUM] = { .type = NLA_U8 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800622};
623
624static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700625ctnetlink_parse_tuple_proto(struct nlattr *attr,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800626 struct nf_conntrack_tuple *tuple)
627{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700628 struct nlattr *tb[CTA_PROTO_MAX+1];
Martin Josefsson605dcad2006-11-29 02:35:06 +0100629 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800630 int ret = 0;
631
Patrick McHardyf73e9242007-09-28 14:39:55 -0700632 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
633 if (ret < 0)
634 return ret;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800635
Patrick McHardydf6fb862007-09-28 14:37:03 -0700636 if (!tb[CTA_PROTO_NUM])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800637 return -EINVAL;
Patrick McHardy77236b62007-12-17 22:29:45 -0800638 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800639
Martin Josefsson605dcad2006-11-29 02:35:06 +0100640 l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800641
Patrick McHardyf73e9242007-09-28 14:39:55 -0700642 if (likely(l4proto->nlattr_to_tuple)) {
643 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
644 l4proto->nla_policy);
645 if (ret == 0)
646 ret = l4proto->nlattr_to_tuple(tb, tuple);
647 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800648
Martin Josefsson605dcad2006-11-29 02:35:06 +0100649 nf_ct_l4proto_put(l4proto);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800650
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800651 return ret;
652}
653
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800654static int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700655ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800656 enum ctattr_tuple type, u_int8_t l3num)
657{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700658 struct nlattr *tb[CTA_TUPLE_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800659 int err;
660
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800661 memset(tuple, 0, sizeof(*tuple));
662
Patrick McHardydf6fb862007-09-28 14:37:03 -0700663 nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800664
Patrick McHardydf6fb862007-09-28 14:37:03 -0700665 if (!tb[CTA_TUPLE_IP])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800666 return -EINVAL;
667
668 tuple->src.l3num = l3num;
669
Patrick McHardydf6fb862007-09-28 14:37:03 -0700670 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800671 if (err < 0)
672 return err;
673
Patrick McHardydf6fb862007-09-28 14:37:03 -0700674 if (!tb[CTA_TUPLE_PROTO])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800675 return -EINVAL;
676
Patrick McHardydf6fb862007-09-28 14:37:03 -0700677 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800678 if (err < 0)
679 return err;
680
681 /* orig and expect tuples get DIR_ORIGINAL */
682 if (type == CTA_TUPLE_REPLY)
683 tuple->dst.dir = IP_CT_DIR_REPLY;
684 else
685 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
686
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800687 return 0;
688}
689
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800690#ifdef CONFIG_NF_NAT_NEEDED
Patrick McHardyf73e9242007-09-28 14:39:55 -0700691static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = {
692 [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 },
693 [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800694};
695
Patrick McHardydf6fb862007-09-28 14:37:03 -0700696static int nfnetlink_parse_nat_proto(struct nlattr *attr,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800697 const struct nf_conn *ct,
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800698 struct nf_nat_range *range)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800699{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700700 struct nlattr *tb[CTA_PROTONAT_MAX+1];
Patrick McHardy2b628a02007-12-17 22:37:36 -0800701 const struct nf_nat_protocol *npt;
Patrick McHardyf73e9242007-09-28 14:39:55 -0700702 int err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800703
Patrick McHardyf73e9242007-09-28 14:39:55 -0700704 err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy);
705 if (err < 0)
706 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800707
Patrick McHardy5e8fbe22008-04-14 11:15:52 +0200708 npt = nf_nat_proto_find_get(nf_ct_protonum(ct));
Patrick McHardyca6a5072008-04-14 11:15:47 +0200709 if (npt->nlattr_to_range)
710 err = npt->nlattr_to_range(tb, range);
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800711 nf_nat_proto_put(npt);
Patrick McHardyca6a5072008-04-14 11:15:47 +0200712 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800713}
714
Patrick McHardyf73e9242007-09-28 14:39:55 -0700715static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
716 [CTA_NAT_MINIP] = { .type = NLA_U32 },
717 [CTA_NAT_MAXIP] = { .type = NLA_U32 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800718};
719
720static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700721nfnetlink_parse_nat(struct nlattr *nat,
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800722 const struct nf_conn *ct, struct nf_nat_range *range)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800723{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700724 struct nlattr *tb[CTA_NAT_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800725 int err;
726
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800727 memset(range, 0, sizeof(*range));
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800728
Patrick McHardyf73e9242007-09-28 14:39:55 -0700729 err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy);
730 if (err < 0)
731 return err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800732
Patrick McHardydf6fb862007-09-28 14:37:03 -0700733 if (tb[CTA_NAT_MINIP])
Patrick McHardy77236b62007-12-17 22:29:45 -0800734 range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800735
Patrick McHardydf6fb862007-09-28 14:37:03 -0700736 if (!tb[CTA_NAT_MAXIP])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800737 range->max_ip = range->min_ip;
738 else
Patrick McHardy77236b62007-12-17 22:29:45 -0800739 range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800740
741 if (range->min_ip)
742 range->flags |= IP_NAT_RANGE_MAP_IPS;
743
Patrick McHardydf6fb862007-09-28 14:37:03 -0700744 if (!tb[CTA_NAT_PROTO])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800745 return 0;
746
Patrick McHardydf6fb862007-09-28 14:37:03 -0700747 err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800748 if (err < 0)
749 return err;
750
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800751 return 0;
752}
753#endif
754
755static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700756ctnetlink_parse_help(struct nlattr *attr, char **helper_name)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800757{
Patrick McHardydf6fb862007-09-28 14:37:03 -0700758 struct nlattr *tb[CTA_HELP_MAX+1];
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800759
Patrick McHardydf6fb862007-09-28 14:37:03 -0700760 nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800761
Patrick McHardydf6fb862007-09-28 14:37:03 -0700762 if (!tb[CTA_HELP_NAME])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800763 return -EINVAL;
764
Patrick McHardydf6fb862007-09-28 14:37:03 -0700765 *helper_name = nla_data(tb[CTA_HELP_NAME]);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800766
767 return 0;
768}
769
Patrick McHardyf73e9242007-09-28 14:39:55 -0700770static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
771 [CTA_STATUS] = { .type = NLA_U32 },
772 [CTA_TIMEOUT] = { .type = NLA_U32 },
773 [CTA_MARK] = { .type = NLA_U32 },
774 [CTA_USE] = { .type = NLA_U32 },
775 [CTA_ID] = { .type = NLA_U32 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800776};
777
778static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800779ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardydf6fb862007-09-28 14:37:03 -0700780 struct nlmsghdr *nlh, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800781{
782 struct nf_conntrack_tuple_hash *h;
783 struct nf_conntrack_tuple tuple;
784 struct nf_conn *ct;
785 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
786 u_int8_t u3 = nfmsg->nfgen_family;
787 int err = 0;
788
Patrick McHardydf6fb862007-09-28 14:37:03 -0700789 if (cda[CTA_TUPLE_ORIG])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800790 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
Patrick McHardydf6fb862007-09-28 14:37:03 -0700791 else if (cda[CTA_TUPLE_REPLY])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800792 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
793 else {
794 /* Flush the whole table */
795 nf_conntrack_flush();
796 return 0;
797 }
798
799 if (err < 0)
800 return err;
801
Patrick McHardy330f7db2007-07-07 22:28:42 -0700802 h = nf_conntrack_find_get(&tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -0700803 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800804 return -ENOENT;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800805
806 ct = nf_ct_tuplehash_to_ctrack(h);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800807
Patrick McHardydf6fb862007-09-28 14:37:03 -0700808 if (cda[CTA_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -0800809 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
Patrick McHardy7f85f912007-09-28 14:41:27 -0700810 if (id != (u32)(unsigned long)ct) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800811 nf_ct_put(ct);
812 return -ENOENT;
813 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800814 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800815 if (del_timer(&ct->timeout))
816 ct->timeout.function((unsigned long)ct);
817
818 nf_ct_put(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800819
820 return 0;
821}
822
823static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800824ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardydf6fb862007-09-28 14:37:03 -0700825 struct nlmsghdr *nlh, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800826{
827 struct nf_conntrack_tuple_hash *h;
828 struct nf_conntrack_tuple tuple;
829 struct nf_conn *ct;
830 struct sk_buff *skb2 = NULL;
831 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
832 u_int8_t u3 = nfmsg->nfgen_family;
833 int err = 0;
834
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800835 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Pablo Neira Ayuso01f34842006-09-20 12:00:45 -0700836#ifndef CONFIG_NF_CT_ACCT
837 if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800838 return -ENOTSUPP;
839#endif
Thomas Grafc702e802007-03-22 23:30:55 -0700840 return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table,
841 ctnetlink_done);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800842 }
843
Patrick McHardydf6fb862007-09-28 14:37:03 -0700844 if (cda[CTA_TUPLE_ORIG])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800845 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
Patrick McHardydf6fb862007-09-28 14:37:03 -0700846 else if (cda[CTA_TUPLE_REPLY])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800847 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
848 else
849 return -EINVAL;
850
851 if (err < 0)
852 return err;
853
Patrick McHardy330f7db2007-07-07 22:28:42 -0700854 h = nf_conntrack_find_get(&tuple);
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -0700855 if (!h)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800856 return -ENOENT;
Pablo Neira Ayuso9ea8cfd2006-10-12 14:09:16 -0700857
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800858 ct = nf_ct_tuplehash_to_ctrack(h);
859
860 err = -ENOMEM;
861 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
862 if (!skb2) {
863 nf_ct_put(ct);
864 return -ENOMEM;
865 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800866
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800867 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800868 IPCTNL_MSG_CT_NEW, 1, ct);
869 nf_ct_put(ct);
870 if (err <= 0)
871 goto free;
872
873 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
874 if (err < 0)
875 goto out;
876
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800877 return 0;
878
879free:
880 kfree_skb(skb2);
881out:
882 return err;
883}
884
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -0800885static int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700886ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800887{
888 unsigned long d;
Patrick McHardy77236b62007-12-17 22:29:45 -0800889 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800890 d = ct->status ^ status;
891
892 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
893 /* unchangeable */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -0700894 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800895
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800896 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
897 /* SEEN_REPLY bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -0700898 return -EBUSY;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800899
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800900 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
901 /* ASSURED bit can only be set */
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -0700902 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800903
Patrick McHardydf6fb862007-09-28 14:37:03 -0700904 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800905#ifndef CONFIG_NF_NAT_NEEDED
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -0700906 return -EOPNOTSUPP;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800907#else
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800908 struct nf_nat_range range;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800909
Patrick McHardydf6fb862007-09-28 14:37:03 -0700910 if (cda[CTA_NAT_DST]) {
911 if (nfnetlink_parse_nat(cda[CTA_NAT_DST], ct,
Patrick McHardy3726add2006-05-29 18:24:39 -0700912 &range) < 0)
913 return -EINVAL;
Patrick McHardycc01dcb2007-12-17 22:38:20 -0800914 if (nf_nat_initialized(ct, IP_NAT_MANIP_DST))
Patrick McHardy3726add2006-05-29 18:24:39 -0700915 return -EEXIST;
Patrick McHardycc01dcb2007-12-17 22:38:20 -0800916 nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST);
Patrick McHardy3726add2006-05-29 18:24:39 -0700917 }
Patrick McHardydf6fb862007-09-28 14:37:03 -0700918 if (cda[CTA_NAT_SRC]) {
919 if (nfnetlink_parse_nat(cda[CTA_NAT_SRC], ct,
Patrick McHardy3726add2006-05-29 18:24:39 -0700920 &range) < 0)
921 return -EINVAL;
Patrick McHardycc01dcb2007-12-17 22:38:20 -0800922 if (nf_nat_initialized(ct, IP_NAT_MANIP_SRC))
Patrick McHardy3726add2006-05-29 18:24:39 -0700923 return -EEXIST;
Patrick McHardycc01dcb2007-12-17 22:38:20 -0800924 nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC);
Patrick McHardy3726add2006-05-29 18:24:39 -0700925 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800926#endif
927 }
928
929 /* Be careful here, modifying NAT bits can screw up things,
930 * so don't let users modify them directly if they don't pass
Jozsef Kadlecsik5b1158e2006-12-02 22:07:13 -0800931 * nf_nat_range. */
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800932 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
933 return 0;
934}
935
936
937static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700938ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800939{
940 struct nf_conntrack_helper *helper;
Harald Weltedc808fe2006-03-20 17:56:32 -0800941 struct nf_conn_help *help = nfct_help(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800942 char *helpname;
943 int err;
944
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800945 /* don't change helper of sibling connections */
946 if (ct->master)
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -0700947 return -EBUSY;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800948
Patrick McHardydf6fb862007-09-28 14:37:03 -0700949 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800950 if (err < 0)
951 return err;
952
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -0700953 if (!strcmp(helpname, "")) {
954 if (help && help->helper) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800955 /* we had a helper before ... */
956 nf_ct_remove_expectations(ct);
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700957 rcu_assign_pointer(help->helper, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800958 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -0700959
960 return 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800961 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800962
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -0700963 helper = __nf_conntrack_helper_find_byname(helpname);
964 if (helper == NULL)
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -0700965 return -EOPNOTSUPP;
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -0700966
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -0700967 if (help) {
968 if (help->helper == helper)
969 return 0;
970 if (help->helper)
971 return -EBUSY;
972 /* need to zero data of old helper */
973 memset(&help->help, 0, sizeof(help->help));
974 } else {
Patrick McHardyb5605802007-07-07 22:35:56 -0700975 help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -0700976 if (help == NULL)
977 return -ENOMEM;
978 }
Yasuyuki Kozakaidf293bb2007-05-10 14:15:58 -0700979
Patrick McHarrdy3c158f72007-06-05 12:55:27 -0700980 rcu_assign_pointer(help->helper, helper);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800981
982 return 0;
983}
984
985static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -0700986ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800987{
Patrick McHardy77236b62007-12-17 22:29:45 -0800988 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -0800989
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -0800990 if (!del_timer(&ct->timeout))
991 return -ETIME;
992
993 ct->timeout.expires = jiffies + timeout * HZ;
994 add_timer(&ct->timeout);
995
996 return 0;
997}
998
999static inline int
Patrick McHardydf6fb862007-09-28 14:37:03 -07001000ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001001{
Patrick McHardydf6fb862007-09-28 14:37:03 -07001002 struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO];
Martin Josefsson605dcad2006-11-29 02:35:06 +01001003 struct nf_conntrack_l4proto *l4proto;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001004 int err = 0;
1005
Patrick McHardydf6fb862007-09-28 14:37:03 -07001006 nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001007
Patrick McHardy5e8fbe22008-04-14 11:15:52 +02001008 l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct));
Patrick McHardyfdf70832007-09-28 14:37:41 -07001009 if (l4proto->from_nlattr)
1010 err = l4proto->from_nlattr(tb, ct);
Martin Josefsson605dcad2006-11-29 02:35:06 +01001011 nf_ct_l4proto_put(l4proto);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001012
1013 return err;
1014}
1015
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001016#ifdef CONFIG_NF_NAT_NEEDED
1017static inline int
1018change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr)
1019{
1020 struct nlattr *cda[CTA_NAT_SEQ_MAX+1];
1021
1022 nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL);
1023
1024 if (!cda[CTA_NAT_SEQ_CORRECTION_POS])
1025 return -EINVAL;
1026
1027 natseq->correction_pos =
Patrick McHardy77236b62007-12-17 22:29:45 -08001028 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001029
1030 if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE])
1031 return -EINVAL;
1032
1033 natseq->offset_before =
Patrick McHardy77236b62007-12-17 22:29:45 -08001034 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001035
1036 if (!cda[CTA_NAT_SEQ_OFFSET_AFTER])
1037 return -EINVAL;
1038
1039 natseq->offset_after =
Patrick McHardy77236b62007-12-17 22:29:45 -08001040 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER]));
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001041
1042 return 0;
1043}
1044
1045static int
1046ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[])
1047{
1048 int ret = 0;
1049 struct nf_conn_nat *nat = nfct_nat(ct);
1050
1051 if (!nat)
1052 return 0;
1053
1054 if (cda[CTA_NAT_SEQ_ADJ_ORIG]) {
1055 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL],
1056 cda[CTA_NAT_SEQ_ADJ_ORIG]);
1057 if (ret < 0)
1058 return ret;
1059
1060 ct->status |= IPS_SEQ_ADJUST;
1061 }
1062
1063 if (cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1064 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY],
1065 cda[CTA_NAT_SEQ_ADJ_REPLY]);
1066 if (ret < 0)
1067 return ret;
1068
1069 ct->status |= IPS_SEQ_ADJUST;
1070 }
1071
1072 return 0;
1073}
1074#endif
1075
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001076static int
Patrick McHardydf6fb862007-09-28 14:37:03 -07001077ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001078{
1079 int err;
1080
Patrick McHardydf6fb862007-09-28 14:37:03 -07001081 if (cda[CTA_HELP]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001082 err = ctnetlink_change_helper(ct, cda);
1083 if (err < 0)
1084 return err;
1085 }
1086
Patrick McHardydf6fb862007-09-28 14:37:03 -07001087 if (cda[CTA_TIMEOUT]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001088 err = ctnetlink_change_timeout(ct, cda);
1089 if (err < 0)
1090 return err;
1091 }
1092
Patrick McHardydf6fb862007-09-28 14:37:03 -07001093 if (cda[CTA_STATUS]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001094 err = ctnetlink_change_status(ct, cda);
1095 if (err < 0)
1096 return err;
1097 }
1098
Patrick McHardydf6fb862007-09-28 14:37:03 -07001099 if (cda[CTA_PROTOINFO]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001100 err = ctnetlink_change_protoinfo(ct, cda);
1101 if (err < 0)
1102 return err;
1103 }
1104
Martin Josefssonbcd1e832006-04-01 02:23:21 -08001105#if defined(CONFIG_NF_CONNTRACK_MARK)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001106 if (cda[CTA_MARK])
Patrick McHardy77236b62007-12-17 22:29:45 -08001107 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001108#endif
1109
Pablo Neira Ayuso13eae152007-12-17 22:28:00 -08001110#ifdef CONFIG_NF_NAT_NEEDED
1111 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1112 err = ctnetlink_change_nat_seq_adj(ct, cda);
1113 if (err < 0)
1114 return err;
1115 }
1116#endif
1117
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001118 return 0;
1119}
1120
1121static int
Patrick McHardydf6fb862007-09-28 14:37:03 -07001122ctnetlink_create_conntrack(struct nlattr *cda[],
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001123 struct nf_conntrack_tuple *otuple,
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001124 struct nf_conntrack_tuple *rtuple,
1125 struct nf_conn *master_ct)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001126{
1127 struct nf_conn *ct;
1128 int err = -EINVAL;
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001129 struct nf_conn_help *help;
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001130 struct nf_conntrack_helper *helper;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001131
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001132 ct = nf_conntrack_alloc(otuple, rtuple);
1133 if (ct == NULL || IS_ERR(ct))
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001134 return -ENOMEM;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001135
Patrick McHardydf6fb862007-09-28 14:37:03 -07001136 if (!cda[CTA_TIMEOUT])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001137 goto err;
Patrick McHardy77236b62007-12-17 22:29:45 -08001138 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001139
1140 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
1141 ct->status |= IPS_CONFIRMED;
1142
Patrick McHardydf6fb862007-09-28 14:37:03 -07001143 if (cda[CTA_STATUS]) {
Pablo Neira Ayusobbb33572006-11-29 02:35:31 +01001144 err = ctnetlink_change_status(ct, cda);
1145 if (err < 0)
1146 goto err;
1147 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001148
Patrick McHardydf6fb862007-09-28 14:37:03 -07001149 if (cda[CTA_PROTOINFO]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001150 err = ctnetlink_change_protoinfo(ct, cda);
1151 if (err < 0)
Patrick McHardyc54ea3b2007-01-15 17:16:03 -08001152 goto err;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001153 }
1154
Martin Josefssonbcd1e832006-04-01 02:23:21 -08001155#if defined(CONFIG_NF_CONNTRACK_MARK)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001156 if (cda[CTA_MARK])
Patrick McHardy77236b62007-12-17 22:29:45 -08001157 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001158#endif
1159
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001160 rcu_read_lock();
1161 helper = __nf_ct_helper_find(rtuple);
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001162 if (helper) {
Patrick McHardyb5605802007-07-07 22:35:56 -07001163 help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001164 if (help == NULL) {
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001165 rcu_read_unlock();
Yasuyuki Kozakaiceceae12007-07-07 22:23:42 -07001166 err = -ENOMEM;
1167 goto err;
1168 }
Patrick McHarrdy3c158f72007-06-05 12:55:27 -07001169 /* not in hash table yet so not strictly necessary */
1170 rcu_assign_pointer(help->helper, helper);
1171 }
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001172
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001173 /* setup master conntrack: this is a confirmed expectation */
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001174 if (master_ct) {
1175 __set_bit(IPS_EXPECTED_BIT, &ct->status);
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001176 ct->master = master_ct;
Pablo Neira Ayusof2a89002007-12-12 10:34:29 -08001177 }
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001178
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001179 add_timer(&ct->timeout);
1180 nf_conntrack_hash_insert(ct);
Patrick McHardy58a3c9b2008-01-31 04:36:54 -08001181 rcu_read_unlock();
Yasuyuki Kozakaidafc7412006-11-27 10:25:32 -08001182
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001183 return 0;
1184
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001185err:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001186 nf_conntrack_free(ct);
1187 return err;
1188}
1189
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001190static int
1191ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardydf6fb862007-09-28 14:37:03 -07001192 struct nlmsghdr *nlh, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001193{
1194 struct nf_conntrack_tuple otuple, rtuple;
1195 struct nf_conntrack_tuple_hash *h = NULL;
1196 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
1197 u_int8_t u3 = nfmsg->nfgen_family;
1198 int err = 0;
1199
Patrick McHardydf6fb862007-09-28 14:37:03 -07001200 if (cda[CTA_TUPLE_ORIG]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001201 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3);
1202 if (err < 0)
1203 return err;
1204 }
1205
Patrick McHardydf6fb862007-09-28 14:37:03 -07001206 if (cda[CTA_TUPLE_REPLY]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001207 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3);
1208 if (err < 0)
1209 return err;
1210 }
1211
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001212 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001213 if (cda[CTA_TUPLE_ORIG])
Patrick McHardyba419af2008-01-31 04:39:23 -08001214 h = __nf_conntrack_find(&otuple);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001215 else if (cda[CTA_TUPLE_REPLY])
Patrick McHardyba419af2008-01-31 04:39:23 -08001216 h = __nf_conntrack_find(&rtuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001217
1218 if (h == NULL) {
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001219 struct nf_conntrack_tuple master;
1220 struct nf_conntrack_tuple_hash *master_h = NULL;
1221 struct nf_conn *master_ct = NULL;
1222
1223 if (cda[CTA_TUPLE_MASTER]) {
1224 err = ctnetlink_parse_tuple(cda,
1225 &master,
1226 CTA_TUPLE_MASTER,
1227 u3);
1228 if (err < 0)
Patrick McHardy1d670fd2008-01-31 04:35:57 -08001229 goto out_unlock;
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001230
Patrick McHardyba419af2008-01-31 04:39:23 -08001231 master_h = __nf_conntrack_find(&master);
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001232 if (master_h == NULL) {
1233 err = -ENOENT;
1234 goto out_unlock;
1235 }
1236 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
1237 atomic_inc(&master_ct->ct_general.use);
1238 }
1239
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001240 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001241 err = -ENOENT;
1242 if (nlh->nlmsg_flags & NLM_F_CREATE)
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001243 err = ctnetlink_create_conntrack(cda,
1244 &otuple,
1245 &rtuple,
1246 master_ct);
1247 if (err < 0 && master_ct)
1248 nf_ct_put(master_ct);
1249
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001250 return err;
1251 }
1252 /* implicit 'else' */
1253
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001254 /* We manipulate the conntrack inside the global conntrack table lock,
1255 * so there's no need to increase the refcount */
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001256 err = -EEXIST;
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001257 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
1258 /* we only allow nat config for new conntracks */
Patrick McHardydf6fb862007-09-28 14:37:03 -07001259 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001260 err = -EOPNOTSUPP;
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001261 goto out_unlock;
1262 }
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001263 /* can't link an existing conntrack to a master */
1264 if (cda[CTA_TUPLE_MASTER]) {
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001265 err = -EOPNOTSUPP;
Pablo Neira Ayuso5faa1f42007-09-28 14:43:53 -07001266 goto out_unlock;
1267 }
Pablo Neira Ayusoff4ca822007-08-07 18:11:26 -07001268 err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h),
1269 cda);
1270 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001271
1272out_unlock:
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001273 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001274 return err;
1275}
1276
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001277/***********************************************************************
1278 * EXPECT
1279 ***********************************************************************/
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001280
1281static inline int
1282ctnetlink_exp_dump_tuple(struct sk_buff *skb,
1283 const struct nf_conntrack_tuple *tuple,
1284 enum ctattr_expect type)
1285{
Patrick McHardydf6fb862007-09-28 14:37:03 -07001286 struct nlattr *nest_parms;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001287
Patrick McHardydf6fb862007-09-28 14:37:03 -07001288 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
1289 if (!nest_parms)
1290 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001291 if (ctnetlink_dump_tuples(skb, tuple) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001292 goto nla_put_failure;
1293 nla_nest_end(skb, nest_parms);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001294
1295 return 0;
1296
Patrick McHardydf6fb862007-09-28 14:37:03 -07001297nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001298 return -1;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001299}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001300
1301static inline int
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001302ctnetlink_exp_dump_mask(struct sk_buff *skb,
1303 const struct nf_conntrack_tuple *tuple,
Patrick McHardyd4156e82007-07-07 22:31:32 -07001304 const struct nf_conntrack_tuple_mask *mask)
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001305{
1306 int ret;
1307 struct nf_conntrack_l3proto *l3proto;
Martin Josefsson605dcad2006-11-29 02:35:06 +01001308 struct nf_conntrack_l4proto *l4proto;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001309 struct nf_conntrack_tuple m;
Patrick McHardydf6fb862007-09-28 14:37:03 -07001310 struct nlattr *nest_parms;
Patrick McHardyd4156e82007-07-07 22:31:32 -07001311
1312 memset(&m, 0xFF, sizeof(m));
1313 m.src.u.all = mask->src.u.all;
1314 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
1315
Patrick McHardydf6fb862007-09-28 14:37:03 -07001316 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
1317 if (!nest_parms)
1318 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001319
1320 l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
Patrick McHardyd4156e82007-07-07 22:31:32 -07001321 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001322 nf_ct_l3proto_put(l3proto);
1323
1324 if (unlikely(ret < 0))
Patrick McHardydf6fb862007-09-28 14:37:03 -07001325 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001326
Martin Josefsson605dcad2006-11-29 02:35:06 +01001327 l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum);
Patrick McHardyd4156e82007-07-07 22:31:32 -07001328 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
Martin Josefsson605dcad2006-11-29 02:35:06 +01001329 nf_ct_l4proto_put(l4proto);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001330 if (unlikely(ret < 0))
Patrick McHardydf6fb862007-09-28 14:37:03 -07001331 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001332
Patrick McHardydf6fb862007-09-28 14:37:03 -07001333 nla_nest_end(skb, nest_parms);
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001334
1335 return 0;
1336
Patrick McHardydf6fb862007-09-28 14:37:03 -07001337nla_put_failure:
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001338 return -1;
1339}
1340
Ilpo Järvinenbb5cf802008-01-05 23:11:31 -08001341static int
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001342ctnetlink_exp_dump_expect(struct sk_buff *skb,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001343 const struct nf_conntrack_expect *exp)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001344{
1345 struct nf_conn *master = exp->master;
Patrick McHardyd978e5d2007-12-17 22:37:03 -08001346 long timeout = (exp->timeout.expires - jiffies) / HZ;
1347
1348 if (timeout < 0)
1349 timeout = 0;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001350
1351 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001352 goto nla_put_failure;
Pablo Neira Ayuso1cde6432006-03-22 13:54:15 -08001353 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001354 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001355 if (ctnetlink_exp_dump_tuple(skb,
1356 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
1357 CTA_EXPECT_MASTER) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001358 goto nla_put_failure;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001359
Patrick McHardyd978e5d2007-12-17 22:37:03 -08001360 NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout));
Patrick McHardy77236b62007-12-17 22:29:45 -08001361 NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp));
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001362
1363 return 0;
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001364
Patrick McHardydf6fb862007-09-28 14:37:03 -07001365nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001366 return -1;
1367}
1368
1369static int
1370ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001371 int event,
1372 int nowait,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001373 const struct nf_conntrack_expect *exp)
1374{
1375 struct nlmsghdr *nlh;
1376 struct nfgenmsg *nfmsg;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001377 unsigned char *b = skb_tail_pointer(skb);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001378
1379 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
1380 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
1381 nfmsg = NLMSG_DATA(nlh);
1382
1383 nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0;
1384 nfmsg->nfgen_family = exp->tuple.src.l3num;
1385 nfmsg->version = NFNETLINK_V0;
1386 nfmsg->res_id = 0;
1387
1388 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001389 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001390
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001391 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001392 return skb->len;
1393
1394nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -07001395nla_put_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -07001396 nlmsg_trim(skb, b);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001397 return -1;
1398}
1399
1400#ifdef CONFIG_NF_CONNTRACK_EVENTS
1401static int ctnetlink_expect_event(struct notifier_block *this,
1402 unsigned long events, void *ptr)
1403{
1404 struct nlmsghdr *nlh;
1405 struct nfgenmsg *nfmsg;
1406 struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr;
1407 struct sk_buff *skb;
1408 unsigned int type;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001409 sk_buff_data_t b;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001410 int flags = 0;
1411
1412 if (events & IPEXP_NEW) {
1413 type = IPCTNL_MSG_EXP_NEW;
1414 flags = NLM_F_CREATE|NLM_F_EXCL;
1415 } else
1416 return NOTIFY_DONE;
1417
Pablo Neira Ayusob3a27bf2006-08-22 00:32:05 -07001418 if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW))
1419 return NOTIFY_DONE;
1420
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001421 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
1422 if (!skb)
1423 return NOTIFY_DONE;
1424
1425 b = skb->tail;
1426
Marcus Sundbergb633ad52006-02-04 02:11:09 -08001427 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001428 nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg));
1429 nfmsg = NLMSG_DATA(nlh);
1430
1431 nlh->nlmsg_flags = flags;
1432 nfmsg->nfgen_family = exp->tuple.src.l3num;
1433 nfmsg->version = NFNETLINK_V0;
1434 nfmsg->res_id = 0;
1435
1436 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
Patrick McHardydf6fb862007-09-28 14:37:03 -07001437 goto nla_put_failure;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001438
1439 nlh->nlmsg_len = skb->tail - b;
1440 nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0);
1441 return NOTIFY_DONE;
1442
1443nlmsg_failure:
Patrick McHardydf6fb862007-09-28 14:37:03 -07001444nla_put_failure:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001445 kfree_skb(skb);
1446 return NOTIFY_DONE;
1447}
1448#endif
Patrick McHardycf6994c2007-07-07 22:32:34 -07001449static int ctnetlink_exp_done(struct netlink_callback *cb)
1450{
Patrick McHardy31f15872007-07-07 22:35:21 -07001451 if (cb->args[1])
1452 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
Patrick McHardycf6994c2007-07-07 22:32:34 -07001453 return 0;
1454}
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001455
1456static int
1457ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
1458{
Patrick McHardycf6994c2007-07-07 22:32:34 -07001459 struct nf_conntrack_expect *exp, *last;
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -08001460 struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
Patrick McHardy31f15872007-07-07 22:35:21 -07001461 struct hlist_node *n;
Pablo Neira Ayuso87711cb2006-01-05 12:19:23 -08001462 u_int8_t l3proto = nfmsg->nfgen_family;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001463
Patrick McHardy7d0742d2008-01-31 04:38:19 -08001464 rcu_read_lock();
Patrick McHardy31f15872007-07-07 22:35:21 -07001465 last = (struct nf_conntrack_expect *)cb->args[1];
1466 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
Patrick McHardycf6994c2007-07-07 22:32:34 -07001467restart:
Patrick McHardy31f15872007-07-07 22:35:21 -07001468 hlist_for_each_entry(exp, n, &nf_ct_expect_hash[cb->args[0]],
1469 hnode) {
1470 if (l3proto && exp->tuple.src.l3num != l3proto)
Patrick McHardycf6994c2007-07-07 22:32:34 -07001471 continue;
Patrick McHardy31f15872007-07-07 22:35:21 -07001472 if (cb->args[1]) {
1473 if (exp != last)
1474 continue;
1475 cb->args[1] = 0;
1476 }
1477 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid,
1478 cb->nlh->nlmsg_seq,
1479 IPCTNL_MSG_EXP_NEW,
1480 1, exp) < 0) {
Patrick McHardy7d0742d2008-01-31 04:38:19 -08001481 if (!atomic_inc_not_zero(&exp->use))
1482 continue;
Patrick McHardy31f15872007-07-07 22:35:21 -07001483 cb->args[1] = (unsigned long)exp;
1484 goto out;
1485 }
Patrick McHardycf6994c2007-07-07 22:32:34 -07001486 }
Patrick McHardy31f15872007-07-07 22:35:21 -07001487 if (cb->args[1]) {
1488 cb->args[1] = 0;
1489 goto restart;
Patrick McHardycf6994c2007-07-07 22:32:34 -07001490 }
1491 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001492out:
Patrick McHardy7d0742d2008-01-31 04:38:19 -08001493 rcu_read_unlock();
Patrick McHardycf6994c2007-07-07 22:32:34 -07001494 if (last)
1495 nf_ct_expect_put(last);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001496
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001497 return skb->len;
1498}
1499
Patrick McHardyf73e9242007-09-28 14:39:55 -07001500static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
1501 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
1502 [CTA_EXPECT_ID] = { .type = NLA_U32 },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001503};
1504
1505static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001506ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardydf6fb862007-09-28 14:37:03 -07001507 struct nlmsghdr *nlh, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001508{
1509 struct nf_conntrack_tuple tuple;
1510 struct nf_conntrack_expect *exp;
1511 struct sk_buff *skb2;
1512 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
1513 u_int8_t u3 = nfmsg->nfgen_family;
1514 int err = 0;
1515
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001516 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafc702e802007-03-22 23:30:55 -07001517 return netlink_dump_start(ctnl, skb, nlh,
1518 ctnetlink_exp_dump_table,
Patrick McHardycf6994c2007-07-07 22:32:34 -07001519 ctnetlink_exp_done);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001520 }
1521
Patrick McHardydf6fb862007-09-28 14:37:03 -07001522 if (cda[CTA_EXPECT_MASTER])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001523 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
1524 else
1525 return -EINVAL;
1526
1527 if (err < 0)
1528 return err;
1529
Patrick McHardy68236452007-07-07 22:30:49 -07001530 exp = nf_ct_expect_find_get(&tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001531 if (!exp)
1532 return -ENOENT;
1533
Patrick McHardydf6fb862007-09-28 14:37:03 -07001534 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08001535 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07001536 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07001537 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001538 return -ENOENT;
1539 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001540 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001541
1542 err = -ENOMEM;
1543 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1544 if (!skb2)
1545 goto out;
Thomas Graf4e9b8262006-11-27 09:25:58 -08001546
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001547 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid,
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001548 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW,
1549 1, exp);
1550 if (err <= 0)
1551 goto free;
1552
Patrick McHardy68236452007-07-07 22:30:49 -07001553 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001554
1555 return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1556
1557free:
1558 kfree_skb(skb2);
1559out:
Patrick McHardy68236452007-07-07 22:30:49 -07001560 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001561 return err;
1562}
1563
1564static int
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001565ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardydf6fb862007-09-28 14:37:03 -07001566 struct nlmsghdr *nlh, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001567{
Patrick McHardy31f15872007-07-07 22:35:21 -07001568 struct nf_conntrack_expect *exp;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001569 struct nf_conntrack_tuple tuple;
1570 struct nf_conntrack_helper *h;
1571 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
Patrick McHardy31f15872007-07-07 22:35:21 -07001572 struct hlist_node *n, *next;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001573 u_int8_t u3 = nfmsg->nfgen_family;
Patrick McHardy31f15872007-07-07 22:35:21 -07001574 unsigned int i;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001575 int err;
1576
Patrick McHardydf6fb862007-09-28 14:37:03 -07001577 if (cda[CTA_EXPECT_TUPLE]) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001578 /* delete a single expect by tuple */
1579 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
1580 if (err < 0)
1581 return err;
1582
1583 /* bump usage count to 2 */
Patrick McHardy68236452007-07-07 22:30:49 -07001584 exp = nf_ct_expect_find_get(&tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001585 if (!exp)
1586 return -ENOENT;
1587
Patrick McHardydf6fb862007-09-28 14:37:03 -07001588 if (cda[CTA_EXPECT_ID]) {
Patrick McHardy77236b62007-12-17 22:29:45 -08001589 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
Patrick McHardy35832402007-09-28 14:41:50 -07001590 if (ntohl(id) != (u32)(unsigned long)exp) {
Patrick McHardy68236452007-07-07 22:30:49 -07001591 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001592 return -ENOENT;
1593 }
1594 }
1595
1596 /* after list removal, usage count == 1 */
Patrick McHardy68236452007-07-07 22:30:49 -07001597 nf_ct_unexpect_related(exp);
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001598 /* have to put what we 'get' above.
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001599 * after this line usage count == 0 */
Patrick McHardy68236452007-07-07 22:30:49 -07001600 nf_ct_expect_put(exp);
Patrick McHardydf6fb862007-09-28 14:37:03 -07001601 } else if (cda[CTA_EXPECT_HELP_NAME]) {
1602 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
Patrick McHardy31f15872007-07-07 22:35:21 -07001603 struct nf_conn_help *m_help;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001604
1605 /* delete all expectations for this helper */
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001606 spin_lock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001607 h = __nf_conntrack_helper_find_byname(name);
1608 if (!h) {
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001609 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayuso0adf9d62008-06-09 15:56:20 -07001610 return -EOPNOTSUPP;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001611 }
Patrick McHardy31f15872007-07-07 22:35:21 -07001612 for (i = 0; i < nf_ct_expect_hsize; i++) {
1613 hlist_for_each_entry_safe(exp, n, next,
1614 &nf_ct_expect_hash[i],
1615 hnode) {
1616 m_help = nfct_help(exp->master);
1617 if (m_help->helper == h
1618 && del_timer(&exp->timeout)) {
1619 nf_ct_unlink_expect(exp);
1620 nf_ct_expect_put(exp);
1621 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001622 }
1623 }
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001624 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001625 } else {
1626 /* This basically means we have to flush everything*/
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001627 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy31f15872007-07-07 22:35:21 -07001628 for (i = 0; i < nf_ct_expect_hsize; i++) {
1629 hlist_for_each_entry_safe(exp, n, next,
1630 &nf_ct_expect_hash[i],
1631 hnode) {
1632 if (del_timer(&exp->timeout)) {
1633 nf_ct_unlink_expect(exp);
1634 nf_ct_expect_put(exp);
1635 }
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001636 }
1637 }
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001638 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001639 }
1640
1641 return 0;
1642}
1643static int
Patrick McHardydf6fb862007-09-28 14:37:03 -07001644ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001645{
1646 return -EOPNOTSUPP;
1647}
1648
1649static int
Patrick McHardydf6fb862007-09-28 14:37:03 -07001650ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3)
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001651{
1652 struct nf_conntrack_tuple tuple, mask, master_tuple;
1653 struct nf_conntrack_tuple_hash *h = NULL;
1654 struct nf_conntrack_expect *exp;
1655 struct nf_conn *ct;
Harald Weltedc808fe2006-03-20 17:56:32 -08001656 struct nf_conn_help *help;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001657 int err = 0;
1658
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001659 /* caller guarantees that those three CTA_EXPECT_* exist */
1660 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
1661 if (err < 0)
1662 return err;
1663 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
1664 if (err < 0)
1665 return err;
1666 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
1667 if (err < 0)
1668 return err;
1669
1670 /* Look for master conntrack of this expectation */
Patrick McHardy330f7db2007-07-07 22:28:42 -07001671 h = nf_conntrack_find_get(&master_tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001672 if (!h)
1673 return -ENOENT;
1674 ct = nf_ct_tuplehash_to_ctrack(h);
Harald Weltedc808fe2006-03-20 17:56:32 -08001675 help = nfct_help(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001676
Harald Weltedc808fe2006-03-20 17:56:32 -08001677 if (!help || !help->helper) {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001678 /* such conntrack hasn't got any helper, abort */
1679 err = -EINVAL;
1680 goto out;
1681 }
1682
Patrick McHardy68236452007-07-07 22:30:49 -07001683 exp = nf_ct_expect_alloc(ct);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001684 if (!exp) {
1685 err = -ENOMEM;
1686 goto out;
1687 }
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001688
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001689 exp->expectfn = NULL;
1690 exp->flags = 0;
1691 exp->master = ct;
Patrick McHardy9457d852006-12-02 22:05:25 -08001692 exp->helper = NULL;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001693 memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
Patrick McHardyd4156e82007-07-07 22:31:32 -07001694 memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
1695 exp->mask.src.u.all = mask.src.u.all;
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001696
Patrick McHardy68236452007-07-07 22:30:49 -07001697 err = nf_ct_expect_related(exp);
1698 nf_ct_expect_put(exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001699
YOSHIFUJI Hideaki601e68e2007-02-12 11:15:49 -08001700out:
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001701 nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
1702 return err;
1703}
1704
1705static int
1706ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
Patrick McHardydf6fb862007-09-28 14:37:03 -07001707 struct nlmsghdr *nlh, struct nlattr *cda[])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001708{
1709 struct nf_conntrack_tuple tuple;
1710 struct nf_conntrack_expect *exp;
1711 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
1712 u_int8_t u3 = nfmsg->nfgen_family;
1713 int err = 0;
1714
Patrick McHardydf6fb862007-09-28 14:37:03 -07001715 if (!cda[CTA_EXPECT_TUPLE]
1716 || !cda[CTA_EXPECT_MASK]
1717 || !cda[CTA_EXPECT_MASTER])
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001718 return -EINVAL;
1719
1720 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
1721 if (err < 0)
1722 return err;
1723
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001724 spin_lock_bh(&nf_conntrack_lock);
Patrick McHardy68236452007-07-07 22:30:49 -07001725 exp = __nf_ct_expect_find(&tuple);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001726
1727 if (!exp) {
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001728 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001729 err = -ENOENT;
1730 if (nlh->nlmsg_flags & NLM_F_CREATE)
1731 err = ctnetlink_create_expect(cda, u3);
1732 return err;
1733 }
1734
1735 err = -EEXIST;
1736 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
1737 err = ctnetlink_change_expect(exp, cda);
Patrick McHardyf8ba1af2008-01-31 04:38:58 -08001738 spin_unlock_bh(&nf_conntrack_lock);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001739
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001740 return err;
1741}
1742
1743#ifdef CONFIG_NF_CONNTRACK_EVENTS
1744static struct notifier_block ctnl_notifier = {
1745 .notifier_call = ctnetlink_conntrack_event,
1746};
1747
1748static struct notifier_block ctnl_notifier_exp = {
1749 .notifier_call = ctnetlink_expect_event,
1750};
1751#endif
1752
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07001753static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001754 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07001755 .attr_count = CTA_MAX,
1756 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001757 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07001758 .attr_count = CTA_MAX,
1759 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001760 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07001761 .attr_count = CTA_MAX,
1762 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001763 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
Patrick McHardyf73e9242007-09-28 14:39:55 -07001764 .attr_count = CTA_MAX,
1765 .policy = ct_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001766};
1767
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07001768static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001769 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07001770 .attr_count = CTA_EXPECT_MAX,
1771 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001772 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07001773 .attr_count = CTA_EXPECT_MAX,
1774 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001775 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
Patrick McHardyf73e9242007-09-28 14:39:55 -07001776 .attr_count = CTA_EXPECT_MAX,
1777 .policy = exp_nla_policy },
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001778};
1779
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07001780static const struct nfnetlink_subsystem ctnl_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001781 .name = "conntrack",
1782 .subsys_id = NFNL_SUBSYS_CTNETLINK,
1783 .cb_count = IPCTNL_MSG_MAX,
1784 .cb = ctnl_cb,
1785};
1786
Patrick McHardy7c8d4cb2007-09-28 14:15:45 -07001787static const struct nfnetlink_subsystem ctnl_exp_subsys = {
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001788 .name = "conntrack_expect",
1789 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
1790 .cb_count = IPCTNL_MSG_EXP_MAX,
1791 .cb = ctnl_exp_cb,
1792};
1793
Patrick McHardyd2483dd2006-12-02 22:06:05 -08001794MODULE_ALIAS("ip_conntrack_netlink");
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001795MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
Pablo Neira Ayuso34f9a2e2006-02-04 02:11:41 -08001796MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001797
1798static int __init ctnetlink_init(void)
1799{
1800 int ret;
1801
1802 printk("ctnetlink v%s: registering with nfnetlink.\n", version);
1803 ret = nfnetlink_subsys_register(&ctnl_subsys);
1804 if (ret < 0) {
1805 printk("ctnetlink_init: cannot register with nfnetlink.\n");
1806 goto err_out;
1807 }
1808
1809 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
1810 if (ret < 0) {
1811 printk("ctnetlink_init: cannot register exp with nfnetlink.\n");
1812 goto err_unreg_subsys;
1813 }
1814
1815#ifdef CONFIG_NF_CONNTRACK_EVENTS
1816 ret = nf_conntrack_register_notifier(&ctnl_notifier);
1817 if (ret < 0) {
1818 printk("ctnetlink_init: cannot register notifier.\n");
1819 goto err_unreg_exp_subsys;
1820 }
1821
Patrick McHardy68236452007-07-07 22:30:49 -07001822 ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001823 if (ret < 0) {
1824 printk("ctnetlink_init: cannot expect register notifier.\n");
1825 goto err_unreg_notifier;
1826 }
1827#endif
1828
1829 return 0;
1830
1831#ifdef CONFIG_NF_CONNTRACK_EVENTS
1832err_unreg_notifier:
1833 nf_conntrack_unregister_notifier(&ctnl_notifier);
1834err_unreg_exp_subsys:
1835 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
1836#endif
1837err_unreg_subsys:
1838 nfnetlink_subsys_unregister(&ctnl_subsys);
1839err_out:
1840 return ret;
1841}
1842
1843static void __exit ctnetlink_exit(void)
1844{
1845 printk("ctnetlink: unregistering from nfnetlink.\n");
1846
1847#ifdef CONFIG_NF_CONNTRACK_EVENTS
Patrick McHardy68236452007-07-07 22:30:49 -07001848 nf_ct_expect_unregister_notifier(&ctnl_notifier_exp);
Pablo Neira Ayusoc1d10ad2006-01-05 12:19:05 -08001849 nf_conntrack_unregister_notifier(&ctnl_notifier);
1850#endif
1851
1852 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
1853 nfnetlink_subsys_unregister(&ctnl_subsys);
1854 return;
1855}
1856
1857module_init(ctnetlink_init);
1858module_exit(ctnetlink_exit);