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Merge tag 'v3.10.108' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / netfilter / nf_conntrack_netlink.c
CommitLineData
c1d10adb
PNA		 1/* 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>
dc808fe2 5 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
c1d10adb 6 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
392025f8 7 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
c1d10adb 8 *
601e68e1 9 * Initial connection tracking via netlink development funded and
c1d10adb
PNA		 10 * 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.
c1d10adb
PNA		 16 */
17
18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
711bbdd6 21#include <linux/rculist.h>
ea781f19 22#include <linux/rculist_nulls.h>
c1d10adb
PNA		 23#include <linux/types.h>
24#include <linux/timer.h>
1cc63249 25#include <linux/security.h>
c1d10adb
PNA		 26#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/netlink.h>
29#include <linux/spinlock.h>
40a839fd 30#include <linux/interrupt.h>
5a0e3ad6 31#include <linux/slab.h>
c1d10adb
PNA		 32
33#include <linux/netfilter.h>
dc5fc579 34#include <net/netlink.h>
9592a5c0 35#include <net/sock.h>
c1d10adb
PNA		 36#include <net/netfilter/nf_conntrack.h>
37#include <net/netfilter/nf_conntrack_core.h>
77ab9cff 38#include <net/netfilter/nf_conntrack_expect.h>
c1d10adb
PNA		 39#include <net/netfilter/nf_conntrack_helper.h>
40#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6 41#include <net/netfilter/nf_conntrack_l4proto.h>
5b1158e9 42#include <net/netfilter/nf_conntrack_tuple.h>
58401572 43#include <net/netfilter/nf_conntrack_acct.h>
ef00f89f 44#include <net/netfilter/nf_conntrack_zones.h>
a992ca2a 45#include <net/netfilter/nf_conntrack_timestamp.h>
c539f017 46#include <net/netfilter/nf_conntrack_labels.h>
5b1158e9
JK		 47#ifdef CONFIG_NF_NAT_NEEDED
48#include <net/netfilter/nf_nat_core.h>
c7232c99 49#include <net/netfilter/nf_nat_l4proto.h>
8c88f87c 50#include <net/netfilter/nf_nat_helper.h>
5b1158e9 51#endif
c1d10adb
PNA		 52
53#include <linux/netfilter/nfnetlink.h>
54#include <linux/netfilter/nfnetlink_conntrack.h>
55
56MODULE_LICENSE("GPL");
57
dc808fe2 58static char __initdata version[] = "0.93";
c1d10adb 59
c1d10adb 60static inline int
601e68e1 61ctnetlink_dump_tuples_proto(struct sk_buff *skb,
1cde6436 62 const struct nf_conntrack_tuple *tuple,
605dcad6 63 struct nf_conntrack_l4proto *l4proto)
c1d10adb 64{
c1d10adb 65 int ret = 0;
df6fb868 66 struct nlattr *nest_parms;
c1d10adb 67
df6fb868
PM		 68 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
69 if (!nest_parms)
70 goto nla_put_failure;
cc1eb431
DM		 71 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
72 goto nla_put_failure;
c1d10adb 73
fdf70832
PM		 74 if (likely(l4proto->tuple_to_nlattr))
75 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 76
df6fb868 77 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 78
79 return ret;
80
df6fb868 81nla_put_failure:
c1d10adb
PNA		 82 return -1;
83}
84
85static inline int
1cde6436
PNA		 86ctnetlink_dump_tuples_ip(struct sk_buff *skb,
87 const struct nf_conntrack_tuple *tuple,
88 struct nf_conntrack_l3proto *l3proto)
c1d10adb 89{
c1d10adb 90 int ret = 0;
df6fb868
PM		 91 struct nlattr *nest_parms;
92
93 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
94 if (!nest_parms)
95 goto nla_put_failure;
1cde6436 96
fdf70832
PM		 97 if (likely(l3proto->tuple_to_nlattr))
98 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 99
df6fb868 100 nla_nest_end(skb, nest_parms);
c1d10adb 101
1cde6436
PNA		 102 return ret;
103
df6fb868 104nla_put_failure:
1cde6436
PNA		 105 return -1;
106}
107
bb5cf80e 108static int
1cde6436
PNA		 109ctnetlink_dump_tuples(struct sk_buff *skb,
110 const struct nf_conntrack_tuple *tuple)
111{
112 int ret;
113 struct nf_conntrack_l3proto *l3proto;
605dcad6 114 struct nf_conntrack_l4proto *l4proto;
1cde6436 115
3b988ece 116 rcu_read_lock();
528a3a6f 117 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 118 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 119
3b988ece
HS		 120 if (ret >= 0) {
121 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
122 tuple->dst.protonum);
123 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
124 }
125 rcu_read_unlock();
c1d10adb 126 return ret;
c1d10adb
PNA		 127}
128
129static inline int
130ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
131{
cc1eb431
DM		 132 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
133 goto nla_put_failure;
c1d10adb
PNA		 134 return 0;
135
df6fb868 136nla_put_failure:
c1d10adb
PNA		 137 return -1;
138}
139
140static inline int
141ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
142{
c1216382 143 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
c1d10adb 144
77236b6e 145 if (timeout < 0)
c1d10adb 146 timeout = 0;
601e68e1 147
cc1eb431
DM		 148 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
149 goto nla_put_failure;
c1d10adb
PNA		 150 return 0;
151
df6fb868 152nla_put_failure:
c1d10adb
PNA		 153 return -1;
154}
155
156static inline int
440f0d58 157ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 158{
5e8fbe2a 159 struct nf_conntrack_l4proto *l4proto;
df6fb868 160 struct nlattr *nest_proto;
c1d10adb
PNA		 161 int ret;
162
528a3a6f
PNA		 163 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
164 if (!l4proto->to_nlattr)
c1d10adb 165 return 0;
601e68e1 166
df6fb868
PM		 167 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
168 if (!nest_proto)
169 goto nla_put_failure;
c1d10adb 170
fdf70832 171 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 172
df6fb868 173 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 174
175 return ret;
176
df6fb868 177nla_put_failure:
c1d10adb
PNA		 178 return -1;
179}
180
181static inline int
182ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
183{
df6fb868 184 struct nlattr *nest_helper;
dc808fe2 185 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 186 struct nf_conntrack_helper *helper;
c1d10adb 187
3c158f7f 188 if (!help)
c1d10adb 189 return 0;
601e68e1 190
3c158f7f
PM		 191 helper = rcu_dereference(help->helper);
192 if (!helper)
193 goto out;
194
df6fb868
PM		 195 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
196 if (!nest_helper)
197 goto nla_put_failure;
cc1eb431
DM		 198 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
199 goto nla_put_failure;
c1d10adb 200
fdf70832
PM		 201 if (helper->to_nlattr)
202 helper->to_nlattr(skb, ct);
c1d10adb 203
df6fb868 204 nla_nest_end(skb, nest_helper);
3c158f7f 205out:
c1d10adb
PNA		 206 return 0;
207
df6fb868 208nla_put_failure:
c1d10adb
PNA		 209 return -1;
210}
211
bb5cf80e 212static int
80e60e67
PNA		 213dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes,
214 enum ip_conntrack_dir dir)
c1d10adb
PNA		 215{
216 enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
df6fb868 217 struct nlattr *nest_count;
c1d10adb 218
df6fb868
PM		 219 nest_count = nla_nest_start(skb, type | NLA_F_NESTED);
220 if (!nest_count)
221 goto nla_put_failure;
222
cc1eb431
DM		 223 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) ||
224 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes)))
225 goto nla_put_failure;
c1d10adb 226
df6fb868 227 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 228
229 return 0;
230
df6fb868 231nla_put_failure:
c1d10adb
PNA		 232 return -1;
233}
c1d10adb 234
80e60e67
PNA		 235static int
236ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
237 enum ip_conntrack_dir dir, int type)
238{
239 struct nf_conn_counter *acct;
240 u64 pkts, bytes;
241
242 acct = nf_conn_acct_find(ct);
243 if (!acct)
244 return 0;
245
246 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
247 pkts = atomic64_xchg(&acct[dir].packets, 0);
248 bytes = atomic64_xchg(&acct[dir].bytes, 0);
249 } else {
250 pkts = atomic64_read(&acct[dir].packets);
251 bytes = atomic64_read(&acct[dir].bytes);
252 }
253 return dump_counters(skb, pkts, bytes, dir);
254}
255
a992ca2a
PNA		 256static int
257ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
258{
259 struct nlattr *nest_count;
260 const struct nf_conn_tstamp *tstamp;
261
262 tstamp = nf_conn_tstamp_find(ct);
263 if (!tstamp)
264 return 0;
265
266 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
267 if (!nest_count)
268 goto nla_put_failure;
269
cc1eb431
DM		 270 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) ||
271 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
272 cpu_to_be64(tstamp->stop))))
273 goto nla_put_failure;
a992ca2a
PNA		 274 nla_nest_end(skb, nest_count);
275
276 return 0;
277
278nla_put_failure:
279 return -1;
280}
281
c1d10adb
PNA		 282#ifdef CONFIG_NF_CONNTRACK_MARK
283static inline int
284ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
285{
cc1eb431
DM		 286 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
287 goto nla_put_failure;
c1d10adb
PNA		 288 return 0;
289
df6fb868 290nla_put_failure:
c1d10adb
PNA		 291 return -1;
292}
293#else
294#define ctnetlink_dump_mark(a, b) (0)
295#endif
296
37fccd85
PNA		 297#ifdef CONFIG_NF_CONNTRACK_SECMARK
298static inline int
1cc63249 299ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 300{
1cc63249
EP		 301 struct nlattr *nest_secctx;
302 int len, ret;
303 char *secctx;
304
305 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
306 if (ret)
cba85b53 307 return 0;
1cc63249
EP		 308
309 ret = -1;
310 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
311 if (!nest_secctx)
312 goto nla_put_failure;
37fccd85 313
cc1eb431
DM		 314 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
315 goto nla_put_failure;
1cc63249
EP		 316 nla_nest_end(skb, nest_secctx);
317
318 ret = 0;
37fccd85 319nla_put_failure:
1cc63249
EP		 320 security_release_secctx(secctx, len);
321 return ret;
37fccd85
PNA		 322}
323#else
1cc63249 324#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 325#endif
326
0ceabd83
FW		 327#ifdef CONFIG_NF_CONNTRACK_LABELS
328static int ctnetlink_label_size(const struct nf_conn *ct)
329{
330 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
331
332 if (!labels)
333 return 0;
334 return nla_total_size(labels->words * sizeof(long));
335}
336
337static int
338ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
339{
340 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
341 unsigned int len, i;
342
343 if (!labels)
344 return 0;
345
346 len = labels->words * sizeof(long);
347 i = 0;
348 do {
349 if (labels->bits[i] != 0)
350 return nla_put(skb, CTA_LABELS, len, labels->bits);
351 i++;
352 } while (i < labels->words);
353
354 return 0;
355}
356#else
357#define ctnetlink_dump_labels(a, b) (0)
358#define ctnetlink_label_size(a) (0)
359#endif
360
0f417ce9
PNA		 361#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
362
363static inline int
364ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
365{
366 struct nlattr *nest_parms;
367
368 if (!(ct->status & IPS_EXPECTED))
369 return 0;
370
371 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
372 if (!nest_parms)
373 goto nla_put_failure;
374 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
375 goto nla_put_failure;
376 nla_nest_end(skb, nest_parms);
377
378 return 0;
379
380nla_put_failure:
381 return -1;
382}
383
13eae15a 384#ifdef CONFIG_NF_NAT_NEEDED
bb5cf80e 385static int
13eae15a
PNA		 386dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type)
387{
13eae15a
PNA		 388 struct nlattr *nest_parms;
389
390 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
391 if (!nest_parms)
392 goto nla_put_failure;
393
cc1eb431
DM		 394 if (nla_put_be32(skb, CTA_NAT_SEQ_CORRECTION_POS,
395 htonl(natseq->correction_pos)) ||
396 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_BEFORE,
397 htonl(natseq->offset_before)) ||
398 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_AFTER,
399 htonl(natseq->offset_after)))
400 goto nla_put_failure;
13eae15a
PNA		 401
402 nla_nest_end(skb, nest_parms);
403
404 return 0;
405
406nla_put_failure:
407 return -1;
408}
409
410static inline int
411ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
412{
413 struct nf_nat_seq *natseq;
414 struct nf_conn_nat *nat = nfct_nat(ct);
415
416 if (!(ct->status & IPS_SEQ_ADJUST) || !nat)
417 return 0;
418
419 natseq = &nat->seq[IP_CT_DIR_ORIGINAL];
420 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1)
421 return -1;
422
423 natseq = &nat->seq[IP_CT_DIR_REPLY];
424 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1)
425 return -1;
426
427 return 0;
428}
429#else
430#define ctnetlink_dump_nat_seq_adj(a, b) (0)
431#endif
432
c1d10adb
PNA		 433static inline int
434ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
435{
cc1eb431
DM		 436 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
437 goto nla_put_failure;
c1d10adb
PNA		 438 return 0;
439
df6fb868 440nla_put_failure:
c1d10adb
PNA		 441 return -1;
442}
443
444static inline int
445ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
446{
cc1eb431
DM		 447 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
448 goto nla_put_failure;
c1d10adb
PNA		 449 return 0;
450
df6fb868 451nla_put_failure:
c1d10adb
PNA		 452 return -1;
453}
454
c1d10adb 455static int
15e47304 456ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
80e60e67 457 struct nf_conn *ct)
c1d10adb
PNA		 458{
459 struct nlmsghdr *nlh;
460 struct nfgenmsg *nfmsg;
df6fb868 461 struct nlattr *nest_parms;
15e47304 462 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c1d10adb 463
80e60e67 464 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
15e47304 465 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 466 if (nlh == NULL)
467 goto nlmsg_failure;
c1d10adb 468
96bcf938 469 nfmsg = nlmsg_data(nlh);
5e8fbe2a 470 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 471 nfmsg->version = NFNETLINK_V0;
472 nfmsg->res_id = 0;
473
df6fb868
PM		 474 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
475 if (!nest_parms)
476 goto nla_put_failure;
f2f3e38c 477 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 478 goto nla_put_failure;
479 nla_nest_end(skb, nest_parms);
601e68e1 480
df6fb868
PM		 481 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
482 if (!nest_parms)
483 goto nla_put_failure;
f2f3e38c 484 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 485 goto nla_put_failure;
486 nla_nest_end(skb, nest_parms);
c1d10adb 487
cc1eb431
DM		 488 if (nf_ct_zone(ct) &&
489 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
490 goto nla_put_failure;
ef00f89f 491
c1d10adb
PNA		 492 if (ctnetlink_dump_status(skb, ct) < 0 ||
493 ctnetlink_dump_timeout(skb, ct) < 0 ||
80e60e67
PNA		 494 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 ||
495 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 496 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 497 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
498 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
499 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 500 ctnetlink_dump_secctx(skb, ct) < 0 ||
0ceabd83 501 ctnetlink_dump_labels(skb, ct) < 0 ||
c1d10adb 502 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 503 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 504 ctnetlink_dump_master(skb, ct) < 0 ||
13eae15a 505 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
df6fb868 506 goto nla_put_failure;
c1d10adb 507
96bcf938 508 nlmsg_end(skb, nlh);
c1d10adb
PNA		 509 return skb->len;
510
511nlmsg_failure:
df6fb868 512nla_put_failure:
96bcf938 513 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 514 return -1;
515}
516
03b64f51
PNA		 517static inline size_t
518ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4
HE		 519{
520 struct nf_conntrack_l3proto *l3proto;
521 struct nf_conntrack_l4proto *l4proto;
03b64f51
PNA		 522 size_t len = 0;
523
524 rcu_read_lock();
525 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
526 len += l3proto->nla_size;
527
528 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
529 len += l4proto->nla_size;
530 rcu_read_unlock();
531
532 return len;
533}
534
d26e6a02
JP		 535static inline size_t
536ctnetlink_counters_size(const struct nf_conn *ct)
537{
538 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
539 return 0;
540 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
541 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
542 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
543 ;
544}
545
cba85b53
PNA		 546static inline int
547ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 548{
cba85b53
PNA		 549#ifdef CONFIG_NF_CONNTRACK_SECMARK
550 int len, ret;
1cc63249 551
cba85b53
PNA		 552 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
553 if (ret)
554 return 0;
1cc63249 555
cba85b53
PNA		 556 return nla_total_size(0) /* CTA_SECCTX */
557 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
558#else
559 return 0;
1cc63249 560#endif
cba85b53 561}
1cc63249 562
a992ca2a
PNA		 563static inline size_t
564ctnetlink_timestamp_size(const struct nf_conn *ct)
565{
566#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
567 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
568 return 0;
569 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
570#else
571 return 0;
572#endif
573}
574
03b64f51
PNA		 575static inline size_t
576ctnetlink_nlmsg_size(const struct nf_conn *ct)
577{
578 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
579 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
580 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
581 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
582 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
583 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
584 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
d26e6a02 585 + ctnetlink_counters_size(ct)
a992ca2a 586 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 587 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
588 + nla_total_size(0) /* CTA_PROTOINFO */
589 + nla_total_size(0) /* CTA_HELP */
590 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 591 + ctnetlink_secctx_size(ct)
d271e8bd 592#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 593 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
594 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 595#endif
596#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 597 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
d271e8bd 598#endif
03b64f51 599 + ctnetlink_proto_size(ct)
0ceabd83 600 + ctnetlink_label_size(ct)
03b64f51 601 ;
2732c4e4
HE		 602}
603
8e36c4b5 604#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 605static int
606ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 607{
9592a5c0 608 struct net *net;
c1d10adb
PNA		 609 struct nlmsghdr *nlh;
610 struct nfgenmsg *nfmsg;
df6fb868 611 struct nlattr *nest_parms;
19abb7b0 612 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 613 struct sk_buff *skb;
614 unsigned int type;
c1d10adb 615 unsigned int flags = 0, group;
dd7669a9 616 int err;
c1d10adb
PNA		 617
618 /* ignore our fake conntrack entry */
5bfddbd4 619 if (nf_ct_is_untracked(ct))
e34d5c1a 620 return 0;
c1d10adb 621
a0891aa6 622 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 623 type = IPCTNL_MSG_CT_DELETE;
624 group = NFNLGRP_CONNTRACK_DESTROY;
a0891aa6 625 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 626 type = IPCTNL_MSG_CT_NEW;
627 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 628 group = NFNLGRP_CONNTRACK_NEW;
17e6e4ea 629 } else if (events) {
c1d10adb
PNA		 630 type = IPCTNL_MSG_CT_NEW;
631 group = NFNLGRP_CONNTRACK_UPDATE;
632 } else
e34d5c1a 633 return 0;
a2427692 634
9592a5c0
AD		 635 net = nf_ct_net(ct);
636 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 637 return 0;
a2427692 638
03b64f51
PNA		 639 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
640 if (skb == NULL)
150ace0d 641 goto errout;
c1d10adb 642
c1d10adb 643 type |= NFNL_SUBSYS_CTNETLINK << 8;
15e47304 644 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 645 if (nlh == NULL)
646 goto nlmsg_failure;
c1d10adb 647
96bcf938 648 nfmsg = nlmsg_data(nlh);
5e8fbe2a 649 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 650 nfmsg->version = NFNETLINK_V0;
651 nfmsg->res_id = 0;
652
528a3a6f 653 rcu_read_lock();
df6fb868
PM		 654 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
655 if (!nest_parms)
656 goto nla_put_failure;
f2f3e38c 657 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 658 goto nla_put_failure;
659 nla_nest_end(skb, nest_parms);
601e68e1 660
df6fb868
PM		 661 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
662 if (!nest_parms)
663 goto nla_put_failure;
f2f3e38c 664 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 665 goto nla_put_failure;
666 nla_nest_end(skb, nest_parms);
c1d10adb 667
cc1eb431
DM		 668 if (nf_ct_zone(ct) &&
669 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
670 goto nla_put_failure;
ef00f89f 671
1eedf699
EL		 672 if (ctnetlink_dump_id(skb, ct) < 0)
673 goto nla_put_failure;
674
e57dce60
FH		 675 if (ctnetlink_dump_status(skb, ct) < 0)
676 goto nla_put_failure;
677
a0891aa6 678 if (events & (1 << IPCT_DESTROY)) {
80e60e67
PNA		 679 if (ctnetlink_dump_counters(skb, ct,
680 IP_CT_DIR_ORIGINAL, type) < 0 ||
681 ctnetlink_dump_counters(skb, ct,
682 IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 683 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 684 goto nla_put_failure;
7b621c1e 685 } else {
7b621c1e 686 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 687 goto nla_put_failure;
7b621c1e 688
a0891aa6 689 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 690 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 691 goto nla_put_failure;
7b621c1e 692
a0891aa6 693 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 694 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 695 goto nla_put_failure;
7b621c1e 696
ff660c80 697#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 698 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 699 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 700 goto nla_put_failure;
ff660c80 701#endif
0ceabd83
FW		 702 if (events & (1 << IPCT_LABEL) &&
703 ctnetlink_dump_labels(skb, ct) < 0)
704 goto nla_put_failure;
7b621c1e 705
a0891aa6 706 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 707 ctnetlink_dump_master(skb, ct) < 0)
708 goto nla_put_failure;
709
a0891aa6 710 if (events & (1 << IPCT_NATSEQADJ) &&
13eae15a
PNA		 711 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
712 goto nla_put_failure;
7b621c1e 713 }
b9a37e0c 714
a83099a6 715#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 716 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 717 && ctnetlink_dump_mark(skb, ct) < 0)
718 goto nla_put_failure;
719#endif
528a3a6f 720 rcu_read_unlock();
a83099a6 721
96bcf938 722 nlmsg_end(skb, nlh);
15e47304 723 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 724 GFP_ATOMIC);
dd7669a9
PNA		 725 if (err == -ENOBUFS || err == -EAGAIN)
726 return -ENOBUFS;
727
e34d5c1a 728 return 0;
c1d10adb 729
df6fb868 730nla_put_failure:
528a3a6f 731 rcu_read_unlock();
96bcf938 732 nlmsg_cancel(skb, nlh);
528a3a6f 733nlmsg_failure:
c1d10adb 734 kfree_skb(skb);
150ace0d 735errout:
37b7ef72
PNA		 736 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
737 return -ENOBUFS;
738
e34d5c1a 739 return 0;
c1d10adb
PNA		 740}
741#endif /* CONFIG_NF_CONNTRACK_EVENTS */
742
743static int ctnetlink_done(struct netlink_callback *cb)
744{
89f2e218
PM		 745 if (cb->args[1])
746 nf_ct_put((struct nf_conn *)cb->args[1]);
0f298a28
PNA		 747 if (cb->data)
748 kfree(cb->data);
c1d10adb
PNA		 749 return 0;
750}
751
0f298a28
PNA		 752struct ctnetlink_dump_filter {
753 struct {
754 u_int32_t val;
755 u_int32_t mask;
756 } mark;
757};
758
c1d10adb
PNA		 759static int
760ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
761{
9592a5c0 762 struct net *net = sock_net(skb->sk);
89f2e218 763 struct nf_conn *ct, *last;
c1d10adb 764 struct nf_conntrack_tuple_hash *h;
ea781f19 765 struct hlist_nulls_node *n;
96bcf938 766 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 767 u_int8_t l3proto = nfmsg->nfgen_family;
3b988ece 768 int res;
0f298a28
PNA		 769#ifdef CONFIG_NF_CONNTRACK_MARK
770 const struct ctnetlink_dump_filter *filter = cb->data;
771#endif
3b988ece 772
13ee6ac5 773 spin_lock_bh(&nf_conntrack_lock);
d205dc40 774 last = (struct nf_conn *)cb->args[1];
9ab99d5a 775 for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) {
89f2e218 776restart:
13ee6ac5 777 hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]],
ea781f19 778 hnnode) {
5b1158e9 779 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 780 continue;
781 ct = nf_ct_tuplehash_to_ctrack(h);
87711cb8
PNA		 782 /* Dump entries of a given L3 protocol number.
783 * If it is not specified, ie. l3proto == 0,
784 * then dump everything. */
5e8fbe2a 785 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 786 continue;
d205dc40
PM		 787 if (cb->args[1]) {
788 if (ct != last)
13ee6ac5 789 continue;
d205dc40 790 cb->args[1] = 0;
89f2e218 791 }
0f298a28
PNA		 792#ifdef CONFIG_NF_CONNTRACK_MARK
793 if (filter && !((ct->mark & filter->mark.mask) ==
794 filter->mark.val)) {
795 continue;
796 }
797#endif
3b988ece
HS		 798 rcu_read_lock();
799 res =
15e47304 800 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 801 cb->nlh->nlmsg_seq,
802 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
803 ct);
804 rcu_read_unlock();
805 if (res < 0) {
c71caf41 806 nf_conntrack_get(&ct->ct_general);
89f2e218 807 cb->args[1] = (unsigned long)ct;
c1d10adb 808 goto out;
89f2e218
PM		 809 }
810 }
d205dc40 811 if (cb->args[1]) {
89f2e218
PM		 812 cb->args[1] = 0;
813 goto restart;
c1d10adb
PNA		 814 }
815 }
89f2e218 816out:
13ee6ac5 817 spin_unlock_bh(&nf_conntrack_lock);
d205dc40
PM		 818 if (last)
819 nf_ct_put(last);
c1d10adb 820
c1d10adb
PNA		 821 return skb->len;
822}
823
c1d10adb 824static inline int
df6fb868 825ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
c1d10adb 826{
df6fb868 827 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 828 struct nf_conntrack_l3proto *l3proto;
829 int ret = 0;
830
df6fb868 831 nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
c1d10adb 832
cd91566e
FW		 833 rcu_read_lock();
834 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 835
f73e924c
PM		 836 if (likely(l3proto->nlattr_to_tuple)) {
837 ret = nla_validate_nested(attr, CTA_IP_MAX,
838 l3proto->nla_policy);
839 if (ret == 0)
840 ret = l3proto->nlattr_to_tuple(tb, tuple);
841 }
c1d10adb 842
cd91566e 843 rcu_read_unlock();
c1d10adb 844
c1d10adb
PNA		 845 return ret;
846}
847
f73e924c
PM		 848static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
849 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 850};
851
852static inline int
df6fb868 853ctnetlink_parse_tuple_proto(struct nlattr *attr,
c1d10adb
PNA		 854 struct nf_conntrack_tuple *tuple)
855{
df6fb868 856 struct nlattr *tb[CTA_PROTO_MAX+1];
605dcad6 857 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 858 int ret = 0;
859
f73e924c
PM		 860 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
861 if (ret < 0)
862 return ret;
c1d10adb 863
df6fb868 864 if (!tb[CTA_PROTO_NUM])
c1d10adb 865 return -EINVAL;
77236b6e 866 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 867
cd91566e
FW		 868 rcu_read_lock();
869 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 870
f73e924c
PM		 871 if (likely(l4proto->nlattr_to_tuple)) {
872 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
873 l4proto->nla_policy);
874 if (ret == 0)
875 ret = l4proto->nlattr_to_tuple(tb, tuple);
876 }
c1d10adb 877
cd91566e 878 rcu_read_unlock();
601e68e1 879
c1d10adb
PNA		 880 return ret;
881}
882
d0b0268f
PM		 883static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
884 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
885 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
886};
887
bb5cf80e 888static int
39938324
PM		 889ctnetlink_parse_tuple(const struct nlattr * const cda[],
890 struct nf_conntrack_tuple *tuple,
a00f1f36 891 enum ctattr_type type, u_int8_t l3num)
c1d10adb 892{
df6fb868 893 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 894 int err;
895
c1d10adb
PNA		 896 memset(tuple, 0, sizeof(*tuple));
897
d0b0268f 898 nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
c1d10adb 899
df6fb868 900 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 901 return -EINVAL;
902
903 tuple->src.l3num = l3num;
904
df6fb868 905 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 906 if (err < 0)
907 return err;
908
df6fb868 909 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 910 return -EINVAL;
911
df6fb868 912 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 913 if (err < 0)
914 return err;
915
916 /* orig and expect tuples get DIR_ORIGINAL */
917 if (type == CTA_TUPLE_REPLY)
918 tuple->dst.dir = IP_CT_DIR_REPLY;
919 else
920 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
921
c1d10adb
PNA		 922 return 0;
923}
924
ef00f89f
PM		 925static int
926ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone)
927{
928 if (attr)
929#ifdef CONFIG_NF_CONNTRACK_ZONES
930 *zone = ntohs(nla_get_be16(attr));
931#else
932 return -EOPNOTSUPP;
933#endif
934 else
935 *zone = 0;
936
937 return 0;
938}
939
d0b0268f 940static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 941 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
942 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 943};
944
c1d10adb 945static inline int
ae243bee
PNA		 946ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
947 struct nlattr **helpinfo)
c1d10adb 948{
df6fb868 949 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 950
d0b0268f 951 nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
c1d10adb 952
df6fb868 953 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 954 return -EINVAL;
955
df6fb868 956 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 957
ae243bee
PNA		 958 if (tb[CTA_HELP_INFO])
959 *helpinfo = tb[CTA_HELP_INFO];
960
c1d10adb
PNA		 961 return 0;
962}
963
9b21f6a9 964#define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE)
f73e924c 965static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 966 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
967 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 968 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 969 [CTA_PROTOINFO] = { .type = NLA_NESTED },
970 [CTA_HELP] = { .type = NLA_NESTED },
971 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 972 [CTA_TIMEOUT] = { .type = NLA_U32 },
973 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 974 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 975 [CTA_NAT_DST] = { .type = NLA_NESTED },
976 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 977 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
978 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 979 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 980 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9
FW		 981 [CTA_LABELS] = { .type = NLA_BINARY,
982 .len = __CTA_LABELS_MAX_LENGTH },
983 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
984 .len = __CTA_LABELS_MAX_LENGTH },
c1d10adb
PNA		 985};
986
987static int
601e68e1 988ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 989 const struct nlmsghdr *nlh,
990 const struct nlattr * const cda[])
c1d10adb 991{
9592a5c0 992 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 993 struct nf_conntrack_tuple_hash *h;
994 struct nf_conntrack_tuple tuple;
995 struct nf_conn *ct;
96bcf938 996 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 997 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 998 u16 zone;
999 int err;
1000
1001 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1002 if (err < 0)
1003 return err;
c1d10adb 1004
df6fb868 1005 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1006 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1007 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1008 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1009 else {
1010 /* Flush the whole table */
9592a5c0 1011 nf_conntrack_flush_report(net,
15e47304 1012 NETLINK_CB(skb).portid,
274d383b 1013 nlmsg_report(nlh));
c1d10adb
PNA		 1014 return 0;
1015 }
1016
1017 if (err < 0)
1018 return err;
1019
ef00f89f 1020 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1021 if (!h)
c1d10adb 1022 return -ENOENT;
c1d10adb
PNA		 1023
1024 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1025
df6fb868 1026 if (cda[CTA_ID]) {
77236b6e 1027 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 1028 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 1029 nf_ct_put(ct);
1030 return -ENOENT;
1031 }
601e68e1 1032 }
c1d10adb 1033
a16a1647
PNA		 1034 if (del_timer(&ct->timeout)) {
1035 if (nf_conntrack_event_report(IPCT_DESTROY, ct,
15e47304 1036 NETLINK_CB(skb).portid,
a16a1647
PNA		 1037 nlmsg_report(nlh)) < 0) {
1038 nf_ct_delete_from_lists(ct);
1039 /* we failed to report the event, try later */
04dac011 1040 nf_ct_dying_timeout(ct);
a16a1647
PNA		 1041 nf_ct_put(ct);
1042 return 0;
1043 }
1044 /* death_by_timeout would report the event again */
1045 set_bit(IPS_DYING_BIT, &ct->status);
dd7669a9 1046 nf_ct_delete_from_lists(ct);
dd7669a9 1047 nf_ct_put(ct);
dd7669a9 1048 }
c1d10adb 1049 nf_ct_put(ct);
c1d10adb
PNA		 1050
1051 return 0;
1052}
1053
1054static int
601e68e1 1055ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1056 const struct nlmsghdr *nlh,
1057 const struct nlattr * const cda[])
c1d10adb 1058{
9592a5c0 1059 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1060 struct nf_conntrack_tuple_hash *h;
1061 struct nf_conntrack_tuple tuple;
1062 struct nf_conn *ct;
1063 struct sk_buff *skb2 = NULL;
96bcf938 1064 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1065 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1066 u16 zone;
1067 int err;
c1d10adb 1068
80d326fa
PNA		 1069 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1070 struct netlink_dump_control c = {
1071 .dump = ctnetlink_dump_table,
1072 .done = ctnetlink_done,
1073 };
0f298a28
PNA		 1074#ifdef CONFIG_NF_CONNTRACK_MARK
1075 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1076 struct ctnetlink_dump_filter *filter;
1077
1078 filter = kzalloc(sizeof(struct ctnetlink_dump_filter),
1079 GFP_ATOMIC);
1080 if (filter == NULL)
1081 return -ENOMEM;
1082
1083 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
1084 filter->mark.mask =
1085 ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
1086 c.data = filter;
1087 }
1088#endif
80d326fa
PNA		 1089 return netlink_dump_start(ctnl, skb, nlh, &c);
1090 }
c1d10adb 1091
ef00f89f
PM		 1092 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1093 if (err < 0)
1094 return err;
1095
df6fb868 1096 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1097 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1098 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1099 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1100 else
1101 return -EINVAL;
1102
1103 if (err < 0)
1104 return err;
1105
ef00f89f 1106 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1107 if (!h)
c1d10adb 1108 return -ENOENT;
9ea8cfd6 1109
c1d10adb
PNA		 1110 ct = nf_ct_tuplehash_to_ctrack(h);
1111
1112 err = -ENOMEM;
96bcf938
PNA		 1113 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1114 if (skb2 == NULL) {
c1d10adb
PNA		 1115 nf_ct_put(ct);
1116 return -ENOMEM;
1117 }
c1d10adb 1118
528a3a6f 1119 rcu_read_lock();
15e47304 1120 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
80e60e67 1121 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1122 rcu_read_unlock();
c1d10adb
PNA		 1123 nf_ct_put(ct);
1124 if (err <= 0)
1125 goto free;
1126
15e47304 1127 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
c1d10adb
PNA		 1128 if (err < 0)
1129 goto out;
1130
c1d10adb
PNA		 1131 return 0;
1132
1133free:
1134 kfree_skb(skb2);
1135out:
f31e8d49
PNA		 1136 /* this avoids a loop in nfnetlink. */
1137 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1138}
1139
d871befe
PNA		 1140static int ctnetlink_done_list(struct netlink_callback *cb)
1141{
1142 if (cb->args[1])
1143 nf_ct_put((struct nf_conn *)cb->args[1]);
1144 return 0;
1145}
1146
1147static int
1148ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb,
1149 struct hlist_nulls_head *list)
1150{
1151 struct nf_conn *ct, *last;
1152 struct nf_conntrack_tuple_hash *h;
1153 struct hlist_nulls_node *n;
1154 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1155 u_int8_t l3proto = nfmsg->nfgen_family;
1156 int res;
1157
1158 if (cb->args[2])
1159 return 0;
1160
1161 spin_lock_bh(&nf_conntrack_lock);
1162 last = (struct nf_conn *)cb->args[1];
1163restart:
1164 hlist_nulls_for_each_entry(h, n, list, hnnode) {
1165 ct = nf_ct_tuplehash_to_ctrack(h);
1166 if (l3proto && nf_ct_l3num(ct) != l3proto)
1167 continue;
1168 if (cb->args[1]) {
1169 if (ct != last)
1170 continue;
1171 cb->args[1] = 0;
1172 }
1173 rcu_read_lock();
1174 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1175 cb->nlh->nlmsg_seq,
1176 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1177 ct);
1178 rcu_read_unlock();
1179 if (res < 0) {
1180 nf_conntrack_get(&ct->ct_general);
1181 cb->args[1] = (unsigned long)ct;
1182 goto out;
1183 }
1184 }
1185 if (cb->args[1]) {
1186 cb->args[1] = 0;
1187 goto restart;
1188 } else
1189 cb->args[2] = 1;
1190out:
1191 spin_unlock_bh(&nf_conntrack_lock);
1192 if (last)
1193 nf_ct_put(last);
1194
1195 return skb->len;
1196}
1197
1198static int
1199ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1200{
1201 struct net *net = sock_net(skb->sk);
1202
1203 return ctnetlink_dump_list(skb, cb, &net->ct.dying);
1204}
1205
1206static int
1207ctnetlink_get_ct_dying(struct sock *ctnl, struct sk_buff *skb,
1208 const struct nlmsghdr *nlh,
1209 const struct nlattr * const cda[])
1210{
1211 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1212 struct netlink_dump_control c = {
1213 .dump = ctnetlink_dump_dying,
1214 .done = ctnetlink_done_list,
1215 };
1216 return netlink_dump_start(ctnl, skb, nlh, &c);
1217 }
1218
1219 return -EOPNOTSUPP;
1220}
1221
1222static int
1223ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1224{
1225 struct net *net = sock_net(skb->sk);
1226
1227 return ctnetlink_dump_list(skb, cb, &net->ct.unconfirmed);
1228}
1229
1230static int
1231ctnetlink_get_ct_unconfirmed(struct sock *ctnl, struct sk_buff *skb,
1232 const struct nlmsghdr *nlh,
1233 const struct nlattr * const cda[])
1234{
1235 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1236 struct netlink_dump_control c = {
1237 .dump = ctnetlink_dump_unconfirmed,
1238 .done = ctnetlink_done_list,
1239 };
1240 return netlink_dump_start(ctnl, skb, nlh, &c);
1241 }
1242
1243 return -EOPNOTSUPP;
1244}
1245
67671841 1246#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1247static int
1248ctnetlink_parse_nat_setup(struct nf_conn *ct,
1249 enum nf_nat_manip_type manip,
39938324 1250 const struct nlattr *attr)
e6a7d3c0
PNA		 1251{
1252 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
c7232c99 1253 int err;
e6a7d3c0
PNA		 1254
1255 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1256 if (!parse_nat_setup) {
95a5afca 1257#ifdef CONFIG_MODULES
e6a7d3c0 1258 rcu_read_unlock();
c14b78e7 1259 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1260 if (request_module("nf-nat") < 0) {
c14b78e7 1261 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1262 rcu_read_lock();
1263 return -EOPNOTSUPP;
1264 }
c14b78e7 1265 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1266 rcu_read_lock();
1267 if (nfnetlink_parse_nat_setup_hook)
1268 return -EAGAIN;
1269#endif
1270 return -EOPNOTSUPP;
1271 }
1272
c7232c99
PM		 1273 err = parse_nat_setup(ct, manip, attr);
1274 if (err == -EAGAIN) {
1275#ifdef CONFIG_MODULES
1276 rcu_read_unlock();
c14b78e7 1277 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1278 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1279 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1280 rcu_read_lock();
1281 return -EOPNOTSUPP;
1282 }
c14b78e7 1283 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1284 rcu_read_lock();
1285#else
1286 err = -EOPNOTSUPP;
1287#endif
1288 }
1289 return err;
e6a7d3c0 1290}
67671841 1291#endif
e6a7d3c0 1292
bb5cf80e 1293static int
39938324 1294ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1295{
1296 unsigned long d;
77236b6e 1297 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1298 d = ct->status ^ status;
1299
1300 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1301 /* unchangeable */
0adf9d67 1302 return -EBUSY;
601e68e1 1303
c1d10adb
PNA		 1304 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1305 /* SEEN_REPLY bit can only be set */
0adf9d67 1306 return -EBUSY;
601e68e1 1307
c1d10adb
PNA		 1308 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1309 /* ASSURED bit can only be set */
0adf9d67 1310 return -EBUSY;
c1d10adb 1311
c1d10adb
PNA		 1312 /* Be careful here, modifying NAT bits can screw up things,
1313 * so don't let users modify them directly if they don't pass
5b1158e9 1314 * nf_nat_range. */
c1d10adb
PNA		 1315 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1316 return 0;
1317}
1318
e6a7d3c0 1319static int
39938324 1320ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1321{
1322#ifdef CONFIG_NF_NAT_NEEDED
1323 int ret;
1324
1325 if (cda[CTA_NAT_DST]) {
1326 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1327 NF_NAT_MANIP_DST,
e6a7d3c0
PNA		 1328 cda[CTA_NAT_DST]);
1329 if (ret < 0)
1330 return ret;
1331 }
1332 if (cda[CTA_NAT_SRC]) {
1333 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1334 NF_NAT_MANIP_SRC,
e6a7d3c0
PNA		 1335 cda[CTA_NAT_SRC]);
1336 if (ret < 0)
1337 return ret;
1338 }
1339 return 0;
1340#else
1341 return -EOPNOTSUPP;
1342#endif
1343}
c1d10adb
PNA		 1344
1345static inline int
39938324 1346ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1347{
1348 struct nf_conntrack_helper *helper;
dc808fe2 1349 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1350 char *helpname = NULL;
ae243bee 1351 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1352 int err;
1353
c1d10adb
PNA		 1354 /* don't change helper of sibling connections */
1355 if (ct->master)
0adf9d67 1356 return -EBUSY;
c1d10adb 1357
ae243bee 1358 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1359 if (err < 0)
1360 return err;
1361
df293bbb
YK		 1362 if (!strcmp(helpname, "")) {
1363 if (help && help->helper) {
c1d10adb
PNA		 1364 /* we had a helper before ... */
1365 nf_ct_remove_expectations(ct);
a9b3cd7f 1366 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1367 }
df293bbb
YK		 1368
1369 return 0;
c1d10adb 1370 }
601e68e1 1371
794e6871
PM		 1372 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1373 nf_ct_protonum(ct));
226c0c0e
PNA		 1374 if (helper == NULL) {
1375#ifdef CONFIG_MODULES
1376 spin_unlock_bh(&nf_conntrack_lock);
1377
1378 if (request_module("nfct-helper-%s", helpname) < 0) {
1379 spin_lock_bh(&nf_conntrack_lock);
1380 return -EOPNOTSUPP;
1381 }
1382
1383 spin_lock_bh(&nf_conntrack_lock);
794e6871
PM		 1384 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1385 nf_ct_protonum(ct));
226c0c0e
PNA		 1386 if (helper)
1387 return -EAGAIN;
1388#endif
0adf9d67 1389 return -EOPNOTSUPP;
226c0c0e 1390 }
df293bbb 1391
ceceae1b 1392 if (help) {
ae243bee
PNA		 1393 if (help->helper == helper) {
1394 /* update private helper data if allowed. */
7be54ca4 1395 if (helper->from_nlattr)
ae243bee 1396 helper->from_nlattr(helpinfo, ct);
ceceae1b 1397 return 0;
fd7462de 1398 } else
ceceae1b 1399 return -EBUSY;
ceceae1b 1400 }
df293bbb 1401
fd7462de
PNA		 1402 /* we cannot set a helper for an existing conntrack */
1403 return -EOPNOTSUPP;
c1d10adb
PNA		 1404}
1405
1406static inline int
39938324 1407ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1408{
77236b6e 1409 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
601e68e1 1410
c1d10adb
PNA		 1411 if (!del_timer(&ct->timeout))
1412 return -ETIME;
1413
1414 ct->timeout.expires = jiffies + timeout * HZ;
1415 add_timer(&ct->timeout);
1416
1417 return 0;
1418}
1419
d0b0268f
PM		 1420static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1421 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1422 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1423 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1424};
1425
c1d10adb 1426static inline int
39938324 1427ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1428{
39938324
PM		 1429 const struct nlattr *attr = cda[CTA_PROTOINFO];
1430 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
605dcad6 1431 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 1432 int err = 0;
1433
d0b0268f 1434 nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
c1d10adb 1435
cd91566e
FW		 1436 rcu_read_lock();
1437 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1438 if (l4proto->from_nlattr)
1439 err = l4proto->from_nlattr(tb, ct);
cd91566e 1440 rcu_read_unlock();
c1d10adb
PNA		 1441
1442 return err;
1443}
1444
13eae15a 1445#ifdef CONFIG_NF_NAT_NEEDED
d0b0268f
PM		 1446static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = {
1447 [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 },
1448 [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 },
1449 [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 },
1450};
1451
13eae15a 1452static inline int
39938324 1453change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr)
13eae15a
PNA		 1454{
1455 struct nlattr *cda[CTA_NAT_SEQ_MAX+1];
1456
d0b0268f 1457 nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy);
13eae15a
PNA		 1458
1459 if (!cda[CTA_NAT_SEQ_CORRECTION_POS])
1460 return -EINVAL;
1461
1462 natseq->correction_pos =
77236b6e 1463 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS]));
13eae15a
PNA		 1464
1465 if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE])
1466 return -EINVAL;
1467
1468 natseq->offset_before =
77236b6e 1469 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE]));
13eae15a
PNA		 1470
1471 if (!cda[CTA_NAT_SEQ_OFFSET_AFTER])
1472 return -EINVAL;
1473
1474 natseq->offset_after =
77236b6e 1475 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER]));
13eae15a
PNA		 1476
1477 return 0;
1478}
1479
1480static int
39938324
PM		 1481ctnetlink_change_nat_seq_adj(struct nf_conn *ct,
1482 const struct nlattr * const cda[])
13eae15a
PNA		 1483{
1484 int ret = 0;
1485 struct nf_conn_nat *nat = nfct_nat(ct);
1486
1487 if (!nat)
1488 return 0;
1489
1490 if (cda[CTA_NAT_SEQ_ADJ_ORIG]) {
1491 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL],
1492 cda[CTA_NAT_SEQ_ADJ_ORIG]);
1493 if (ret < 0)
1494 return ret;
1495
1496 ct->status |= IPS_SEQ_ADJUST;
1497 }
1498
1499 if (cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1500 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY],
1501 cda[CTA_NAT_SEQ_ADJ_REPLY]);
1502 if (ret < 0)
1503 return ret;
1504
1505 ct->status |= IPS_SEQ_ADJUST;
1506 }
1507
1508 return 0;
1509}
1510#endif
1511
9b21f6a9
FW		 1512static int
1513ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1514{
1515#ifdef CONFIG_NF_CONNTRACK_LABELS
1516 size_t len = nla_len(cda[CTA_LABELS]);
1517 const void *mask = cda[CTA_LABELS_MASK];
1518
1519 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1520 return -EINVAL;
1521
1522 if (mask) {
1523 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1524 nla_len(cda[CTA_LABELS_MASK]) != len)
1525 return -EINVAL;
1526 mask = nla_data(cda[CTA_LABELS_MASK]);
1527 }
1528
1529 len /= sizeof(u32);
1530
1531 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1532#else
1533 return -EOPNOTSUPP;
1534#endif
1535}
1536
c1d10adb 1537static int
39938324
PM		 1538ctnetlink_change_conntrack(struct nf_conn *ct,
1539 const struct nlattr * const cda[])
c1d10adb
PNA		 1540{
1541 int err;
1542
e098360f
PNA		 1543 /* only allow NAT changes and master assignation for new conntracks */
1544 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1545 return -EOPNOTSUPP;
1546
df6fb868 1547 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1548 err = ctnetlink_change_helper(ct, cda);
1549 if (err < 0)
1550 return err;
1551 }
1552
df6fb868 1553 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1554 err = ctnetlink_change_timeout(ct, cda);
1555 if (err < 0)
1556 return err;
1557 }
1558
df6fb868 1559 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1560 err = ctnetlink_change_status(ct, cda);
1561 if (err < 0)
1562 return err;
1563 }
1564
df6fb868 1565 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1566 err = ctnetlink_change_protoinfo(ct, cda);
1567 if (err < 0)
1568 return err;
1569 }
1570
bcd1e830 1571#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1572 if (cda[CTA_MARK])
77236b6e 1573 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1574#endif
1575
13eae15a
PNA		 1576#ifdef CONFIG_NF_NAT_NEEDED
1577 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1578 err = ctnetlink_change_nat_seq_adj(ct, cda);
1579 if (err < 0)
1580 return err;
1581 }
1582#endif
9b21f6a9
FW		 1583 if (cda[CTA_LABELS]) {
1584 err = ctnetlink_attach_labels(ct, cda);
1585 if (err < 0)
1586 return err;
1587 }
13eae15a 1588
c1d10adb
PNA		 1589 return 0;
1590}
1591
f0a3c086 1592static struct nf_conn *
ef00f89f 1593ctnetlink_create_conntrack(struct net *net, u16 zone,
9592a5c0 1594 const struct nlattr * const cda[],
c1d10adb 1595 struct nf_conntrack_tuple *otuple,
5faa1f4c 1596 struct nf_conntrack_tuple *rtuple,
7ec47496 1597 u8 u3)
c1d10adb
PNA		 1598{
1599 struct nf_conn *ct;
1600 int err = -EINVAL;
ceceae1b 1601 struct nf_conntrack_helper *helper;
315c34da 1602 struct nf_conn_tstamp *tstamp;
c1d10adb 1603
ef00f89f 1604 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1605 if (IS_ERR(ct))
f0a3c086 1606 return ERR_PTR(-ENOMEM);
c1d10adb 1607
df6fb868 1608 if (!cda[CTA_TIMEOUT])
0f5b3e85 1609 goto err1;
77236b6e 1610 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
c1d10adb
PNA		 1611
1612 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
c1d10adb 1613
1575e7ea 1614 rcu_read_lock();
226c0c0e 1615 if (cda[CTA_HELP]) {
29fe1b48 1616 char *helpname = NULL;
ae243bee
PNA		 1617 struct nlattr *helpinfo = NULL;
1618
1619 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1620 if (err < 0)
1621 goto err2;
226c0c0e 1622
794e6871
PM		 1623 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1624 nf_ct_protonum(ct));
226c0c0e
PNA		 1625 if (helper == NULL) {
1626 rcu_read_unlock();
1627#ifdef CONFIG_MODULES
1628 if (request_module("nfct-helper-%s", helpname) < 0) {
1629 err = -EOPNOTSUPP;
0f5b3e85 1630 goto err1;
226c0c0e
PNA		 1631 }
1632
1633 rcu_read_lock();
794e6871
PM		 1634 helper = __nf_conntrack_helper_find(helpname,
1635 nf_ct_l3num(ct),
1636 nf_ct_protonum(ct));
226c0c0e 1637 if (helper) {
226c0c0e 1638 err = -EAGAIN;
0f5b3e85 1639 goto err2;
226c0c0e
PNA		 1640 }
1641 rcu_read_unlock();
1642#endif
1643 err = -EOPNOTSUPP;
0f5b3e85 1644 goto err1;
226c0c0e
PNA		 1645 } else {
1646 struct nf_conn_help *help;
1647
1afc5679 1648 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1649 if (help == NULL) {
226c0c0e 1650 err = -ENOMEM;
0f5b3e85 1651 goto err2;
226c0c0e 1652 }
ae243bee 1653 /* set private helper data if allowed. */
7be54ca4 1654 if (helper->from_nlattr)
ae243bee 1655 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1656
1657 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1658 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1659 }
1660 } else {
1661 /* try an implicit helper assignation */
b2a15a60 1662 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1663 if (err < 0)
1664 goto err2;
1575e7ea
PNA		 1665 }
1666
a88e22ad
PNA		 1667 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
1668 err = ctnetlink_change_nat(ct, cda);
0f5b3e85
PM		 1669 if (err < 0)
1670 goto err2;
e6a7d3c0
PNA		 1671 }
1672
a88e22ad 1673 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1674 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 1675 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017
FW		 1676 nf_ct_labels_ext_add(ct);
1677
a88e22ad
PNA		 1678 /* we must add conntrack extensions before confirmation. */
1679 ct->status |= IPS_CONFIRMED;
1680
1681 if (cda[CTA_STATUS]) {
1682 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1683 if (err < 0)
1684 goto err2;
bbb3357d 1685 }
c1d10adb 1686
c969aa7d
PNA		 1687#ifdef CONFIG_NF_NAT_NEEDED
1688 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1689 err = ctnetlink_change_nat_seq_adj(ct, cda);
0f5b3e85
PM		 1690 if (err < 0)
1691 goto err2;
c969aa7d
PNA		 1692 }
1693#endif
1694
e5fc9e7a 1695 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 1696 if (cda[CTA_PROTOINFO]) {
c1d10adb 1697 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 1698 if (err < 0)
1699 goto err2;
c1d10adb
PNA		 1700 }
1701
bcd1e830 1702#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1703 if (cda[CTA_MARK])
77236b6e 1704 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1705#endif
1706
5faa1f4c 1707 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 1708 if (cda[CTA_TUPLE_MASTER]) {
1709 struct nf_conntrack_tuple master;
1710 struct nf_conntrack_tuple_hash *master_h;
1711 struct nf_conn *master_ct;
1712
1713 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
1714 if (err < 0)
0f5b3e85 1715 goto err2;
7ec47496 1716
ef00f89f 1717 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 1718 if (master_h == NULL) {
1719 err = -ENOENT;
0f5b3e85 1720 goto err2;
7ec47496
PNA		 1721 }
1722 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 1723 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 1724 ct->master = master_ct;
f2a89004 1725 }
315c34da
PNA		 1726 tstamp = nf_conn_tstamp_find(ct);
1727 if (tstamp)
1728 tstamp->start = ktime_to_ns(ktime_get_real());
5faa1f4c 1729
7d367e06
JK		 1730 err = nf_conntrack_hash_check_insert(ct);
1731 if (err < 0)
1732 goto err2;
1733
58a3c9bb 1734 rcu_read_unlock();
dafc741c 1735
f0a3c086 1736 return ct;
c1d10adb 1737
0f5b3e85
PM		 1738err2:
1739 rcu_read_unlock();
1740err1:
c1d10adb 1741 nf_conntrack_free(ct);
f0a3c086 1742 return ERR_PTR(err);
c1d10adb
PNA		 1743}
1744
601e68e1
YH		 1745static int
1746ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1747 const struct nlmsghdr *nlh,
1748 const struct nlattr * const cda[])
c1d10adb 1749{
9592a5c0 1750 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1751 struct nf_conntrack_tuple otuple, rtuple;
1752 struct nf_conntrack_tuple_hash *h = NULL;
96bcf938 1753 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
7d367e06 1754 struct nf_conn *ct;
c1d10adb 1755 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1756 u16 zone;
1757 int err;
1758
1759 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1760 if (err < 0)
1761 return err;
c1d10adb 1762
df6fb868 1763 if (cda[CTA_TUPLE_ORIG]) {
c1d10adb
PNA		 1764 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3);
1765 if (err < 0)
1766 return err;
1767 }
1768
df6fb868 1769 if (cda[CTA_TUPLE_REPLY]) {
c1d10adb
PNA		 1770 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3);
1771 if (err < 0)
1772 return err;
1773 }
1774
df6fb868 1775 if (cda[CTA_TUPLE_ORIG])
7d367e06 1776 h = nf_conntrack_find_get(net, zone, &otuple);
df6fb868 1777 else if (cda[CTA_TUPLE_REPLY])
7d367e06 1778 h = nf_conntrack_find_get(net, zone, &rtuple);
c1d10adb
PNA		 1779
1780 if (h == NULL) {
c1d10adb 1781 err = -ENOENT;
f0a3c086 1782 if (nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 1783 enum ip_conntrack_events events;
5faa1f4c 1784
442fad94
FW		 1785 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
1786 return -EINVAL;
1787
ef00f89f 1788 ct = ctnetlink_create_conntrack(net, zone, cda, &otuple,
f0a3c086 1789 &rtuple, u3);
7d367e06
JK		 1790 if (IS_ERR(ct))
1791 return PTR_ERR(ct);
1792
f0a3c086 1793 err = 0;
fecc1133
PNA		 1794 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1795 events = IPCT_RELATED;
1796 else
1797 events = IPCT_NEW;
1798
9b21f6a9
FW		 1799 if (cda[CTA_LABELS] &&
1800 ctnetlink_attach_labels(ct, cda) == 0)
1801 events |= (1 << IPCT_LABEL);
1802
858b3133
PM		 1803 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1804 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1805 (1 << IPCT_HELPER) |
1806 (1 << IPCT_PROTOINFO) |
1807 (1 << IPCT_NATSEQADJ) |
1808 (1 << IPCT_MARK) | events,
15e47304 1809 ct, NETLINK_CB(skb).portid,
a0891aa6 1810 nlmsg_report(nlh));
f0a3c086 1811 nf_ct_put(ct);
7d367e06 1812 }
5faa1f4c 1813
c1d10adb
PNA		 1814 return err;
1815 }
1816 /* implicit 'else' */
1817
c1d10adb 1818 err = -EEXIST;
7d367e06 1819 ct = nf_ct_tuplehash_to_ctrack(h);
ff4ca827 1820 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
7d367e06 1821 spin_lock_bh(&nf_conntrack_lock);
19abb7b0 1822 err = ctnetlink_change_conntrack(ct, cda);
7d367e06 1823 spin_unlock_bh(&nf_conntrack_lock);
19abb7b0 1824 if (err == 0) {
858b3133
PM		 1825 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1826 (1 << IPCT_ASSURED) |
a0891aa6 1827 (1 << IPCT_HELPER) |
797a7d66 1828 (1 << IPCT_LABEL) |
a0891aa6
PNA		 1829 (1 << IPCT_PROTOINFO) |
1830 (1 << IPCT_NATSEQADJ) |
1831 (1 << IPCT_MARK),
15e47304 1832 ct, NETLINK_CB(skb).portid,
a0891aa6 1833 nlmsg_report(nlh));
7d367e06 1834 }
ff4ca827 1835 }
c1d10adb 1836
7d367e06 1837 nf_ct_put(ct);
c1d10adb
PNA		 1838 return err;
1839}
1840
392025f8 1841static int
15e47304 1842ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 1843 __u16 cpu, const struct ip_conntrack_stat *st)
1844{
1845 struct nlmsghdr *nlh;
1846 struct nfgenmsg *nfmsg;
15e47304 1847 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 1848
1849 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU);
15e47304 1850 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 1851 if (nlh == NULL)
1852 goto nlmsg_failure;
1853
1854 nfmsg = nlmsg_data(nlh);
1855 nfmsg->nfgen_family = AF_UNSPEC;
1856 nfmsg->version = NFNETLINK_V0;
1857 nfmsg->res_id = htons(cpu);
1858
1859 if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) ||
1860 nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
1861 nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) ||
1862 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
1863 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
1864 nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) ||
1865 nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) ||
1866 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
1867 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
1868 htonl(st->insert_failed)) ||
1869 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
1870 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
1871 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
1872 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
1873 htonl(st->search_restart)))
1874 goto nla_put_failure;
1875
1876 nlmsg_end(skb, nlh);
1877 return skb->len;
1878
1879nla_put_failure:
1880nlmsg_failure:
1881 nlmsg_cancel(skb, nlh);
1882 return -1;
1883}
1884
1885static int
1886ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
1887{
1888 int cpu;
1889 struct net *net = sock_net(skb->sk);
1890
1891 if (cb->args[0] == nr_cpu_ids)
1892 return 0;
1893
1894 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1895 const struct ip_conntrack_stat *st;
1896
1897 if (!cpu_possible(cpu))
1898 continue;
1899
1900 st = per_cpu_ptr(net->ct.stat, cpu);
1901 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 1902 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 1903 cb->nlh->nlmsg_seq,
1904 cpu, st) < 0)
1905 break;
1906 }
1907 cb->args[0] = cpu;
1908
1909 return skb->len;
1910}
1911
1912static int
1913ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb,
1914 const struct nlmsghdr *nlh,
1915 const struct nlattr * const cda[])
1916{
1917 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1918 struct netlink_dump_control c = {
1919 .dump = ctnetlink_ct_stat_cpu_dump,
1920 };
1921 return netlink_dump_start(ctnl, skb, nlh, &c);
1922 }
1923
1924 return 0;
1925}
1926
1927static int
15e47304 1928ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 1929 struct net *net)
1930{
1931 struct nlmsghdr *nlh;
1932 struct nfgenmsg *nfmsg;
15e47304 1933 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 1934 unsigned int nr_conntracks = atomic_read(&net->ct.count);
1935
1936 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS);
15e47304 1937 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 1938 if (nlh == NULL)
1939 goto nlmsg_failure;
1940
1941 nfmsg = nlmsg_data(nlh);
1942 nfmsg->nfgen_family = AF_UNSPEC;
1943 nfmsg->version = NFNETLINK_V0;
1944 nfmsg->res_id = 0;
1945
1946 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
1947 goto nla_put_failure;
1948
1949 nlmsg_end(skb, nlh);
1950 return skb->len;
1951
1952nla_put_failure:
1953nlmsg_failure:
1954 nlmsg_cancel(skb, nlh);
1955 return -1;
1956}
1957
1958static int
1959ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb,
1960 const struct nlmsghdr *nlh,
1961 const struct nlattr * const cda[])
1962{
1963 struct sk_buff *skb2;
1964 int err;
1965
1966 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1967 if (skb2 == NULL)
1968 return -ENOMEM;
1969
15e47304 1970 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
392025f8
PNA		 1971 nlh->nlmsg_seq,
1972 NFNL_MSG_TYPE(nlh->nlmsg_type),
1973 sock_net(skb->sk));
1974 if (err <= 0)
1975 goto free;
1976
15e47304 1977 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
392025f8
PNA		 1978 if (err < 0)
1979 goto out;
1980
1981 return 0;
1982
1983free:
1984 kfree_skb(skb2);
1985out:
1986 /* this avoids a loop in nfnetlink. */
1987 return err == -EAGAIN ? -ENOBUFS : err;
1988}
1989
7c622345 1990#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 1991static size_t
1992ctnetlink_nfqueue_build_size(const struct nf_conn *ct)
1993{
1994 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
1995 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
1996 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
1997 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
1998 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
1999 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2000 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2001 + nla_total_size(0) /* CTA_PROTOINFO */
2002 + nla_total_size(0) /* CTA_HELP */
2003 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2004 + ctnetlink_secctx_size(ct)
2005#ifdef CONFIG_NF_NAT_NEEDED
2006 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2007 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2008#endif
2009#ifdef CONFIG_NF_CONNTRACK_MARK
2010 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
2011#endif
2012 + ctnetlink_proto_size(ct)
2013 ;
2014}
2015
2016static int
2017ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
2018{
2019 struct nlattr *nest_parms;
2020
2021 rcu_read_lock();
2022 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2023 if (!nest_parms)
2024 goto nla_put_failure;
2025 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2026 goto nla_put_failure;
2027 nla_nest_end(skb, nest_parms);
2028
2029 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2030 if (!nest_parms)
2031 goto nla_put_failure;
2032 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2033 goto nla_put_failure;
2034 nla_nest_end(skb, nest_parms);
2035
2036 if (nf_ct_zone(ct)) {
2037 if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
2038 goto nla_put_failure;
2039 }
2040
2041 if (ctnetlink_dump_id(skb, ct) < 0)
2042 goto nla_put_failure;
2043
2044 if (ctnetlink_dump_status(skb, ct) < 0)
2045 goto nla_put_failure;
2046
2047 if (ctnetlink_dump_timeout(skb, ct) < 0)
2048 goto nla_put_failure;
2049
2050 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2051 goto nla_put_failure;
2052
2053 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2054 goto nla_put_failure;
2055
2056#ifdef CONFIG_NF_CONNTRACK_SECMARK
2057 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2058 goto nla_put_failure;
2059#endif
2060 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2061 goto nla_put_failure;
2062
2063 if ((ct->status & IPS_SEQ_ADJUST) &&
2064 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
2065 goto nla_put_failure;
2066
2067#ifdef CONFIG_NF_CONNTRACK_MARK
2068 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2069 goto nla_put_failure;
2070#endif
0ceabd83
FW		 2071 if (ctnetlink_dump_labels(skb, ct) < 0)
2072 goto nla_put_failure;
9cb01766
PNA		 2073 rcu_read_unlock();
2074 return 0;
2075
2076nla_put_failure:
2077 rcu_read_unlock();
2078 return -ENOSPC;
2079}
2080
2081static int
2082ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
2083{
2084 int err;
2085
2086 if (cda[CTA_TIMEOUT]) {
2087 err = ctnetlink_change_timeout(ct, cda);
2088 if (err < 0)
2089 return err;
2090 }
2091 if (cda[CTA_STATUS]) {
2092 err = ctnetlink_change_status(ct, cda);
2093 if (err < 0)
2094 return err;
2095 }
2096 if (cda[CTA_HELP]) {
2097 err = ctnetlink_change_helper(ct, cda);
2098 if (err < 0)
2099 return err;
2100 }
9b21f6a9
FW		 2101 if (cda[CTA_LABELS]) {
2102 err = ctnetlink_attach_labels(ct, cda);
2103 if (err < 0)
2104 return err;
2105 }
9cb01766
PNA		 2106#if defined(CONFIG_NF_CONNTRACK_MARK)
2107 if (cda[CTA_MARK])
2108 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2109#endif
2110 return 0;
2111}
2112
2113static int
2114ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct)
2115{
2116 struct nlattr *cda[CTA_MAX+1];
68e035c9 2117 int ret;
9cb01766
PNA		 2118
2119 nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
2120
68e035c9
PNA		 2121 spin_lock_bh(&nf_conntrack_lock);
2122 ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct);
2123 spin_unlock_bh(&nf_conntrack_lock);
2124
2125 return ret;
9cb01766
PNA		 2126}
2127
2128static struct nfq_ct_hook ctnetlink_nfqueue_hook = {
2129 .build_size = ctnetlink_nfqueue_build_size,
2130 .build = ctnetlink_nfqueue_build,
2131 .parse = ctnetlink_nfqueue_parse,
2132};
7c622345 2133#endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
9cb01766 2134
601e68e1
YH		 2135/***********************************************************************
2136 * EXPECT
2137 ***********************************************************************/
c1d10adb
PNA		 2138
2139static inline int
2140ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2141 const struct nf_conntrack_tuple *tuple,
2142 enum ctattr_expect type)
2143{
df6fb868 2144 struct nlattr *nest_parms;
601e68e1 2145
df6fb868
PM		 2146 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2147 if (!nest_parms)
2148 goto nla_put_failure;
c1d10adb 2149 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2150 goto nla_put_failure;
2151 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2152
2153 return 0;
2154
df6fb868 2155nla_put_failure:
c1d10adb 2156 return -1;
601e68e1 2157}
c1d10adb 2158
1cde6436
PNA		 2159static inline int
2160ctnetlink_exp_dump_mask(struct sk_buff *skb,
2161 const struct nf_conntrack_tuple *tuple,
d4156e8c 2162 const struct nf_conntrack_tuple_mask *mask)
1cde6436
PNA		 2163{
2164 int ret;
2165 struct nf_conntrack_l3proto *l3proto;
605dcad6 2166 struct nf_conntrack_l4proto *l4proto;
d4156e8c 2167 struct nf_conntrack_tuple m;
df6fb868 2168 struct nlattr *nest_parms;
d4156e8c
PM		 2169
2170 memset(&m, 0xFF, sizeof(m));
d4156e8c 2171 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 2172 m.src.u.all = mask->src.u.all;
2173 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2174
df6fb868
PM		 2175 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2176 if (!nest_parms)
2177 goto nla_put_failure;
1cde6436 2178
3b988ece 2179 rcu_read_lock();
528a3a6f 2180 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 2181 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 2182 if (ret >= 0) {
2183 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2184 tuple->dst.protonum);
d4156e8c 2185 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2186 }
2187 rcu_read_unlock();
2188
1cde6436 2189 if (unlikely(ret < 0))
df6fb868 2190 goto nla_put_failure;
1cde6436 2191
df6fb868 2192 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2193
2194 return 0;
2195
df6fb868 2196nla_put_failure:
1cde6436
PNA		 2197 return -1;
2198}
2199
c7232c99
PM		 2200static const union nf_inet_addr any_addr;
2201
bb5cf80e 2202static int
c1d10adb 2203ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2204 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2205{
2206 struct nf_conn *master = exp->master;
c1216382 2207 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 2208 struct nf_conn_help *help;
076a0ca0
PNA		 2209#ifdef CONFIG_NF_NAT_NEEDED
2210 struct nlattr *nest_parms;
2211 struct nf_conntrack_tuple nat_tuple = {};
2212#endif
544d5c7d
PNA		 2213 struct nf_ct_helper_expectfn *expfn;
2214
d978e5da
PM		 2215 if (timeout < 0)
2216 timeout = 0;
c1d10adb
PNA		 2217
2218 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 2219 goto nla_put_failure;
1cde6436 2220 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 2221 goto nla_put_failure;
c1d10adb
PNA		 2222 if (ctnetlink_exp_dump_tuple(skb,
2223 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2224 CTA_EXPECT_MASTER) < 0)
df6fb868 2225 goto nla_put_failure;
601e68e1 2226
076a0ca0 2227#ifdef CONFIG_NF_NAT_NEEDED
c7232c99
PM		 2228 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2229 exp->saved_proto.all) {
076a0ca0
PNA		 2230 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2231 if (!nest_parms)
2232 goto nla_put_failure;
2233
cc1eb431
DM		 2234 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2235 goto nla_put_failure;
076a0ca0
PNA		 2236
2237 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 2238 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 2239 nat_tuple.dst.protonum = nf_ct_protonum(master);
2240 nat_tuple.src.u = exp->saved_proto;
2241
2242 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2243 CTA_EXPECT_NAT_TUPLE) < 0)
2244 goto nla_put_failure;
2245 nla_nest_end(skb, nest_parms);
2246 }
2247#endif
cc1eb431
DM		 2248 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2249 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2250 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2251 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2252 goto nla_put_failure;
bc01befd
PNA		 2253 help = nfct_help(master);
2254 if (help) {
2255 struct nf_conntrack_helper *helper;
2256
2257 helper = rcu_dereference(help->helper);
cc1eb431
DM		 2258 if (helper &&
2259 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2260 goto nla_put_failure;
bc01befd 2261 }
544d5c7d 2262 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 2263 if (expfn != NULL &&
2264 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2265 goto nla_put_failure;
c1d10adb
PNA		 2266
2267 return 0;
601e68e1 2268
df6fb868 2269nla_put_failure:
c1d10adb
PNA		 2270 return -1;
2271}
2272
2273static int
15e47304 2274ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 2275 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2276{
2277 struct nlmsghdr *nlh;
2278 struct nfgenmsg *nfmsg;
15e47304 2279 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb
PNA		 2280
2281 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2282 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 2283 if (nlh == NULL)
2284 goto nlmsg_failure;
c1d10adb 2285
96bcf938 2286 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2287 nfmsg->nfgen_family = exp->tuple.src.l3num;
2288 nfmsg->version = NFNETLINK_V0;
2289 nfmsg->res_id = 0;
2290
2291 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2292 goto nla_put_failure;
c1d10adb 2293
96bcf938 2294 nlmsg_end(skb, nlh);
c1d10adb
PNA		 2295 return skb->len;
2296
2297nlmsg_failure:
df6fb868 2298nla_put_failure:
96bcf938 2299 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 2300 return -1;
2301}
2302
2303#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2304static int
2305ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 2306{
9592a5c0
AD		 2307 struct nf_conntrack_expect *exp = item->exp;
2308 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 2309 struct nlmsghdr *nlh;
2310 struct nfgenmsg *nfmsg;
c1d10adb 2311 struct sk_buff *skb;
ebbf41df 2312 unsigned int type, group;
c1d10adb
PNA		 2313 int flags = 0;
2314
ebbf41df
PNA		 2315 if (events & (1 << IPEXP_DESTROY)) {
2316 type = IPCTNL_MSG_EXP_DELETE;
2317 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2318 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 2319 type = IPCTNL_MSG_EXP_NEW;
2320 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 2321 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 2322 } else
e34d5c1a 2323 return 0;
c1d10adb 2324
ebbf41df 2325 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 2326 return 0;
b3a27bfb 2327
96bcf938
PNA		 2328 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2329 if (skb == NULL)
150ace0d 2330 goto errout;
c1d10adb 2331
b633ad5f 2332 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2333 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 2334 if (nlh == NULL)
2335 goto nlmsg_failure;
c1d10adb 2336
96bcf938 2337 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2338 nfmsg->nfgen_family = exp->tuple.src.l3num;
2339 nfmsg->version = NFNETLINK_V0;
2340 nfmsg->res_id = 0;
2341
528a3a6f 2342 rcu_read_lock();
c1d10adb 2343 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2344 goto nla_put_failure;
528a3a6f 2345 rcu_read_unlock();
c1d10adb 2346
96bcf938 2347 nlmsg_end(skb, nlh);
15e47304 2348 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 2349 return 0;
c1d10adb 2350
df6fb868 2351nla_put_failure:
528a3a6f 2352 rcu_read_unlock();
96bcf938 2353 nlmsg_cancel(skb, nlh);
528a3a6f 2354nlmsg_failure:
c1d10adb 2355 kfree_skb(skb);
150ace0d 2356errout:
9592a5c0 2357 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 2358 return 0;
c1d10adb
PNA		 2359}
2360#endif
cf6994c2
PM		 2361static int ctnetlink_exp_done(struct netlink_callback *cb)
2362{
31f15875
PM		 2363 if (cb->args[1])
2364 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2365 return 0;
2366}
c1d10adb
PNA		 2367
2368static int
2369ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2370{
9592a5c0 2371 struct net *net = sock_net(skb->sk);
cf6994c2 2372 struct nf_conntrack_expect *exp, *last;
96bcf938 2373 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 2374 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2375
7d0742da 2376 rcu_read_lock();
31f15875
PM		 2377 last = (struct nf_conntrack_expect *)cb->args[1];
2378 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2379restart:
b67bfe0d 2380 hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]],
31f15875
PM		 2381 hnode) {
2382 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2383 continue;
31f15875
PM		 2384 if (cb->args[1]) {
2385 if (exp != last)
2386 continue;
2387 cb->args[1] = 0;
2388 }
8b0a231d 2389 if (ctnetlink_exp_fill_info(skb,
15e47304 2390 NETLINK_CB(cb->skb).portid,
31f15875
PM		 2391 cb->nlh->nlmsg_seq,
2392 IPCTNL_MSG_EXP_NEW,
8b0a231d 2393 exp) < 0) {
7d0742da
PM		 2394 if (!atomic_inc_not_zero(&exp->use))
2395 continue;
31f15875
PM		 2396 cb->args[1] = (unsigned long)exp;
2397 goto out;
2398 }
cf6994c2 2399 }
31f15875
PM		 2400 if (cb->args[1]) {
2401 cb->args[1] = 0;
2402 goto restart;
cf6994c2
PM		 2403 }
2404 }
601e68e1 2405out:
7d0742da 2406 rcu_read_unlock();
cf6994c2
PM		 2407 if (last)
2408 nf_ct_expect_put(last);
c1d10adb 2409
c1d10adb
PNA		 2410 return skb->len;
2411}
2412
e844a928
PNA		 2413static int
2414ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2415{
2416 struct nf_conntrack_expect *exp, *last;
2417 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2418 struct nf_conn *ct = cb->data;
2419 struct nf_conn_help *help = nfct_help(ct);
2420 u_int8_t l3proto = nfmsg->nfgen_family;
2421
2422 if (cb->args[0])
2423 return 0;
2424
2425 rcu_read_lock();
2426 last = (struct nf_conntrack_expect *)cb->args[1];
2427restart:
2428 hlist_for_each_entry(exp, &help->expectations, lnode) {
2429 if (l3proto && exp->tuple.src.l3num != l3proto)
2430 continue;
2431 if (cb->args[1]) {
2432 if (exp != last)
2433 continue;
2434 cb->args[1] = 0;
2435 }
2436 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2437 cb->nlh->nlmsg_seq,
2438 IPCTNL_MSG_EXP_NEW,
2439 exp) < 0) {
2440 if (!atomic_inc_not_zero(&exp->use))
2441 continue;
2442 cb->args[1] = (unsigned long)exp;
2443 goto out;
2444 }
2445 }
2446 if (cb->args[1]) {
2447 cb->args[1] = 0;
2448 goto restart;
2449 }
2450 cb->args[0] = 1;
2451out:
2452 rcu_read_unlock();
2453 if (last)
2454 nf_ct_expect_put(last);
2455
2456 return skb->len;
2457}
2458
2459static int ctnetlink_dump_exp_ct(struct sock *ctnl, struct sk_buff *skb,
2460 const struct nlmsghdr *nlh,
2461 const struct nlattr * const cda[])
2462{
2463 int err;
2464 struct net *net = sock_net(ctnl);
2465 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2466 u_int8_t u3 = nfmsg->nfgen_family;
2467 struct nf_conntrack_tuple tuple;
2468 struct nf_conntrack_tuple_hash *h;
2469 struct nf_conn *ct;
2470 u16 zone = 0;
2471 struct netlink_dump_control c = {
2472 .dump = ctnetlink_exp_ct_dump_table,
2473 .done = ctnetlink_exp_done,
2474 };
2475
2476 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2477 if (err < 0)
2478 return err;
2479
2480 if (cda[CTA_EXPECT_ZONE]) {
2481 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2482 if (err < 0)
2483 return err;
2484 }
2485
2486 h = nf_conntrack_find_get(net, zone, &tuple);
2487 if (!h)
2488 return -ENOENT;
2489
2490 ct = nf_ct_tuplehash_to_ctrack(h);
2491 c.data = ct;
2492
2493 err = netlink_dump_start(ctnl, skb, nlh, &c);
2494 nf_ct_put(ct);
2495
2496 return err;
2497}
2498
f73e924c 2499static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
d0b0268f
PM		 2500 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2501 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2502 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
f73e924c
PM		 2503 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2504 [CTA_EXPECT_ID] = { .type = NLA_U32 },
6d1fafca
FW		 2505 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2506 .len = NF_CT_HELPER_NAME_LEN - 1 },
bcac0dfa 2507 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
8b008faf 2508 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
b8c5e52c 2509 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
076a0ca0 2510 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
544d5c7d 2511 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
c1d10adb
PNA		 2512};
2513
2514static int
601e68e1 2515ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2516 const struct nlmsghdr *nlh,
2517 const struct nlattr * const cda[])
c1d10adb 2518{
9592a5c0 2519 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2520 struct nf_conntrack_tuple tuple;
2521 struct nf_conntrack_expect *exp;
2522 struct sk_buff *skb2;
96bcf938 2523 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2524 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2525 u16 zone;
2526 int err;
c1d10adb 2527
b8f3ab42 2528 if (nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928
PNA		 2529 if (cda[CTA_EXPECT_MASTER])
2530 return ctnetlink_dump_exp_ct(ctnl, skb, nlh, cda);
2531 else {
2532 struct netlink_dump_control c = {
2533 .dump = ctnetlink_exp_dump_table,
2534 .done = ctnetlink_exp_done,
2535 };
2536 return netlink_dump_start(ctnl, skb, nlh, &c);
2537 }
c1d10adb
PNA		 2538 }
2539
ef00f89f
PM		 2540 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2541 if (err < 0)
2542 return err;
2543
35dba1d7
PNA		 2544 if (cda[CTA_EXPECT_TUPLE])
2545 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2546 else if (cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2547 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2548 else
2549 return -EINVAL;
2550
2551 if (err < 0)
2552 return err;
2553
ef00f89f 2554 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2555 if (!exp)
2556 return -ENOENT;
2557
df6fb868 2558 if (cda[CTA_EXPECT_ID]) {
77236b6e 2559 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2560 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2561 nf_ct_expect_put(exp);
c1d10adb
PNA		 2562 return -ENOENT;
2563 }
601e68e1 2564 }
c1d10adb
PNA		 2565
2566 err = -ENOMEM;
96bcf938 2567 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2568 if (skb2 == NULL) {
2569 nf_ct_expect_put(exp);
c1d10adb 2570 goto out;
81378f72 2571 }
4e9b8269 2572
528a3a6f 2573 rcu_read_lock();
15e47304 2574 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
8b0a231d 2575 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2576 rcu_read_unlock();
81378f72 2577 nf_ct_expect_put(exp);
c1d10adb
PNA		 2578 if (err <= 0)
2579 goto free;
2580
15e47304 2581 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
81378f72
PNA		 2582 if (err < 0)
2583 goto out;
c1d10adb 2584
81378f72 2585 return 0;
c1d10adb
PNA		 2586
2587free:
2588 kfree_skb(skb2);
2589out:
81378f72
PNA		 2590 /* this avoids a loop in nfnetlink. */
2591 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2592}
2593
2594static int
601e68e1 2595ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2596 const struct nlmsghdr *nlh,
2597 const struct nlattr * const cda[])
c1d10adb 2598{
9592a5c0 2599 struct net *net = sock_net(ctnl);
31f15875 2600 struct nf_conntrack_expect *exp;
c1d10adb 2601 struct nf_conntrack_tuple tuple;
96bcf938 2602 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
b67bfe0d 2603 struct hlist_node *next;
c1d10adb 2604 u_int8_t u3 = nfmsg->nfgen_family;
31f15875 2605 unsigned int i;
ef00f89f 2606 u16 zone;
c1d10adb
PNA		 2607 int err;
2608
df6fb868 2609 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2610 /* delete a single expect by tuple */
ef00f89f
PM		 2611 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2612 if (err < 0)
2613 return err;
2614
c1d10adb
PNA		 2615 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2616 if (err < 0)
2617 return err;
2618
2619 /* bump usage count to 2 */
ef00f89f 2620 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2621 if (!exp)
2622 return -ENOENT;
2623
df6fb868 2624 if (cda[CTA_EXPECT_ID]) {
77236b6e 2625 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2626 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2627 nf_ct_expect_put(exp);
c1d10adb
PNA		 2628 return -ENOENT;
2629 }
2630 }
2631
2632 /* after list removal, usage count == 1 */
ebbf41df
PNA		 2633 spin_lock_bh(&nf_conntrack_lock);
2634 if (del_timer(&exp->timeout)) {
15e47304 2635 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
ebbf41df
PNA		 2636 nlmsg_report(nlh));
2637 nf_ct_expect_put(exp);
2638 }
2639 spin_unlock_bh(&nf_conntrack_lock);
601e68e1 2640 /* have to put what we 'get' above.
c1d10adb 2641 * after this line usage count == 0 */
6823645d 2642 nf_ct_expect_put(exp);
df6fb868
PM		 2643 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2644 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
31f15875 2645 struct nf_conn_help *m_help;
c1d10adb
PNA		 2646
2647 /* delete all expectations for this helper */
f8ba1aff 2648 spin_lock_bh(&nf_conntrack_lock);
31f15875 2649 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2650 hlist_for_each_entry_safe(exp, next,
9592a5c0 2651 &net->ct.expect_hash[i],
31f15875
PM		 2652 hnode) {
2653 m_help = nfct_help(exp->master);
794e6871
PM		 2654 if (!strcmp(m_help->helper->name, name) &&
2655 del_timer(&exp->timeout)) {
ebbf41df 2656 nf_ct_unlink_expect_report(exp,
15e47304 2657 NETLINK_CB(skb).portid,
ebbf41df 2658 nlmsg_report(nlh));
31f15875
PM		 2659 nf_ct_expect_put(exp);
2660 }
c1d10adb
PNA		 2661 }
2662 }
f8ba1aff 2663 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2664 } else {
2665 /* This basically means we have to flush everything*/
f8ba1aff 2666 spin_lock_bh(&nf_conntrack_lock);
31f15875 2667 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2668 hlist_for_each_entry_safe(exp, next,
9592a5c0 2669 &net->ct.expect_hash[i],
31f15875
PM		 2670 hnode) {
2671 if (del_timer(&exp->timeout)) {
ebbf41df 2672 nf_ct_unlink_expect_report(exp,
15e47304 2673 NETLINK_CB(skb).portid,
ebbf41df 2674 nlmsg_report(nlh));
31f15875
PM		 2675 nf_ct_expect_put(exp);
2676 }
c1d10adb
PNA		 2677 }
2678 }
f8ba1aff 2679 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2680 }
2681
2682 return 0;
2683}
2684static int
39938324
PM		 2685ctnetlink_change_expect(struct nf_conntrack_expect *x,
2686 const struct nlattr * const cda[])
c1d10adb 2687{
9768e1ac
KW		 2688 if (cda[CTA_EXPECT_TIMEOUT]) {
2689 if (!del_timer(&x->timeout))
2690 return -ETIME;
2691
2692 x->timeout.expires = jiffies +
2693 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2694 add_timer(&x->timeout);
2695 }
2696 return 0;
c1d10adb
PNA		 2697}
2698
076a0ca0
PNA		 2699static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2700 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2701 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2702};
2703
2704static int
2705ctnetlink_parse_expect_nat(const struct nlattr *attr,
2706 struct nf_conntrack_expect *exp,
2707 u_int8_t u3)
2708{
2709#ifdef CONFIG_NF_NAT_NEEDED
2710 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2711 struct nf_conntrack_tuple nat_tuple = {};
2712 int err;
2713
2714 nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2715
2716 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2717 return -EINVAL;
2718
2719 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2720 &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3);
2721 if (err < 0)
2722 return err;
2723
c7232c99 2724 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 2725 exp->saved_proto = nat_tuple.src.u;
2726 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2727
2728 return 0;
2729#else
2730 return -EOPNOTSUPP;
2731#endif
2732}
2733
c1d10adb 2734static int
ef00f89f
PM		 2735ctnetlink_create_expect(struct net *net, u16 zone,
2736 const struct nlattr * const cda[],
9592a5c0 2737 u_int8_t u3,
15e47304 2738 u32 portid, int report)
c1d10adb
PNA		 2739{
2740 struct nf_conntrack_tuple tuple, mask, master_tuple;
2741 struct nf_conntrack_tuple_hash *h = NULL;
2742 struct nf_conntrack_expect *exp;
2743 struct nf_conn *ct;
dc808fe2 2744 struct nf_conn_help *help;
660fdb2a 2745 struct nf_conntrack_helper *helper = NULL;
b8c5e52c 2746 u_int32_t class = 0;
c1d10adb
PNA		 2747 int err = 0;
2748
c1d10adb
PNA		 2749 /* caller guarantees that those three CTA_EXPECT_* exist */
2750 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2751 if (err < 0)
2752 return err;
2753 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
2754 if (err < 0)
2755 return err;
2756 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
2757 if (err < 0)
2758 return err;
2759
2760 /* Look for master conntrack of this expectation */
ef00f89f 2761 h = nf_conntrack_find_get(net, zone, &master_tuple);
c1d10adb
PNA		 2762 if (!h)
2763 return -ENOENT;
2764 ct = nf_ct_tuplehash_to_ctrack(h);
660fdb2a
PNA		 2765
2766 /* Look for helper of this expectation */
2767 if (cda[CTA_EXPECT_HELP_NAME]) {
2768 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2769
2770 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2771 nf_ct_protonum(ct));
2772 if (helper == NULL) {
2773#ifdef CONFIG_MODULES
2774 if (request_module("nfct-helper-%s", helpname) < 0) {
2775 err = -EOPNOTSUPP;
2776 goto out;
2777 }
2778
2779 helper = __nf_conntrack_helper_find(helpname,
2780 nf_ct_l3num(ct),
2781 nf_ct_protonum(ct));
2782 if (helper) {
2783 err = -EAGAIN;
2784 goto out;
2785 }
2786#endif
2787 err = -EOPNOTSUPP;
2788 goto out;
2789 }
2790 }
2791
b8c5e52c
PNA		 2792 if (cda[CTA_EXPECT_CLASS] && helper) {
2793 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
2794 if (class > helper->expect_class_max) {
2795 err = -EINVAL;
2796 goto out;
2797 }
2798 }
6823645d 2799 exp = nf_ct_expect_alloc(ct);
c1d10adb
PNA		 2800 if (!exp) {
2801 err = -ENOMEM;
2802 goto out;
2803 }
bc01befd
PNA		 2804 help = nfct_help(ct);
2805 if (!help) {
2806 if (!cda[CTA_EXPECT_TIMEOUT]) {
2807 err = -EINVAL;
1310b955 2808 goto err_out;
bc01befd
PNA		 2809 }
2810 exp->timeout.expires =
2811 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
601e68e1 2812
bc01befd
PNA		 2813 exp->flags = NF_CT_EXPECT_USERSPACE;
2814 if (cda[CTA_EXPECT_FLAGS]) {
2815 exp->flags |=
2816 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2817 }
2818 } else {
2819 if (cda[CTA_EXPECT_FLAGS]) {
2820 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2821 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
2822 } else
2823 exp->flags = 0;
2824 }
544d5c7d
PNA		 2825 if (cda[CTA_EXPECT_FN]) {
2826 const char *name = nla_data(cda[CTA_EXPECT_FN]);
2827 struct nf_ct_helper_expectfn *expfn;
2828
2829 expfn = nf_ct_helper_expectfn_find_by_name(name);
2830 if (expfn == NULL) {
2831 err = -EINVAL;
2832 goto err_out;
2833 }
2834 exp->expectfn = expfn->expectfn;
2835 } else
2836 exp->expectfn = NULL;
601e68e1 2837
b8c5e52c 2838 exp->class = class;
c1d10adb 2839 exp->master = ct;
660fdb2a 2840 exp->helper = helper;
c1d10adb 2841 memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
d4156e8c
PM		 2842 memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
2843 exp->mask.src.u.all = mask.src.u.all;
c1d10adb 2844
076a0ca0
PNA		 2845 if (cda[CTA_EXPECT_NAT]) {
2846 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
2847 exp, u3);
2848 if (err < 0)
2849 goto err_out;
2850 }
15e47304 2851 err = nf_ct_expect_related_report(exp, portid, report);
076a0ca0 2852err_out:
6823645d 2853 nf_ct_expect_put(exp);
601e68e1 2854out:
c1d10adb
PNA		 2855 nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
2856 return err;
2857}
2858
2859static int
2860ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2861 const struct nlmsghdr *nlh,
2862 const struct nlattr * const cda[])
c1d10adb 2863{
9592a5c0 2864 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2865 struct nf_conntrack_tuple tuple;
2866 struct nf_conntrack_expect *exp;
96bcf938 2867 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2868 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2869 u16 zone;
2870 int err;
c1d10adb 2871
df6fb868
PM		 2872 if (!cda[CTA_EXPECT_TUPLE]
2873 || !cda[CTA_EXPECT_MASK]
2874 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2875 return -EINVAL;
2876
ef00f89f
PM		 2877 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2878 if (err < 0)
2879 return err;
2880
c1d10adb
PNA		 2881 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2882 if (err < 0)
2883 return err;
2884
f8ba1aff 2885 spin_lock_bh(&nf_conntrack_lock);
ef00f89f 2886 exp = __nf_ct_expect_find(net, zone, &tuple);
c1d10adb
PNA		 2887
2888 if (!exp) {
f8ba1aff 2889 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2890 err = -ENOENT;
19abb7b0 2891 if (nlh->nlmsg_flags & NLM_F_CREATE) {
ef00f89f 2892 err = ctnetlink_create_expect(net, zone, cda,
19abb7b0 2893 u3,
15e47304 2894 NETLINK_CB(skb).portid,
19abb7b0
PNA		 2895 nlmsg_report(nlh));
2896 }
c1d10adb
PNA		 2897 return err;
2898 }
2899
2900 err = -EEXIST;
2901 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
2902 err = ctnetlink_change_expect(exp, cda);
f8ba1aff 2903 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2904
c1d10adb
PNA		 2905 return err;
2906}
2907
392025f8 2908static int
15e47304 2909ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 2910 const struct ip_conntrack_stat *st)
2911{
2912 struct nlmsghdr *nlh;
2913 struct nfgenmsg *nfmsg;
15e47304 2914 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 2915
2916 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU);
15e47304 2917 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2918 if (nlh == NULL)
2919 goto nlmsg_failure;
2920
2921 nfmsg = nlmsg_data(nlh);
2922 nfmsg->nfgen_family = AF_UNSPEC;
2923 nfmsg->version = NFNETLINK_V0;
2924 nfmsg->res_id = htons(cpu);
2925
2926 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
2927 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
2928 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
2929 goto nla_put_failure;
2930
2931 nlmsg_end(skb, nlh);
2932 return skb->len;
2933
2934nla_put_failure:
2935nlmsg_failure:
2936 nlmsg_cancel(skb, nlh);
2937 return -1;
2938}
2939
2940static int
2941ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2942{
2943 int cpu;
2944 struct net *net = sock_net(skb->sk);
2945
2946 if (cb->args[0] == nr_cpu_ids)
2947 return 0;
2948
2949 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2950 const struct ip_conntrack_stat *st;
2951
2952 if (!cpu_possible(cpu))
2953 continue;
2954
2955 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 2956 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2957 cb->nlh->nlmsg_seq,
2958 cpu, st) < 0)
2959 break;
2960 }
2961 cb->args[0] = cpu;
2962
2963 return skb->len;
2964}
2965
2966static int
2967ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb,
2968 const struct nlmsghdr *nlh,
2969 const struct nlattr * const cda[])
2970{
2971 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2972 struct netlink_dump_control c = {
2973 .dump = ctnetlink_exp_stat_cpu_dump,
2974 };
2975 return netlink_dump_start(ctnl, skb, nlh, &c);
2976 }
2977
2978 return 0;
2979}
2980
c1d10adb 2981#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2982static struct nf_ct_event_notifier ctnl_notifier = {
2983 .fcn = ctnetlink_conntrack_event,
c1d10adb
PNA		 2984};
2985
e34d5c1a
PNA		 2986static struct nf_exp_event_notifier ctnl_notifier_exp = {
2987 .fcn = ctnetlink_expect_event,
c1d10adb
PNA		 2988};
2989#endif
2990
7c8d4cb4 2991static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
c1d10adb 2992 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
f73e924c
PM		 2993 .attr_count = CTA_MAX,
2994 .policy = ct_nla_policy },
c1d10adb 2995 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 2996 .attr_count = CTA_MAX,
2997 .policy = ct_nla_policy },
c1d10adb 2998 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
f73e924c
PM		 2999 .attr_count = CTA_MAX,
3000 .policy = ct_nla_policy },
c1d10adb 3001 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3002 .attr_count = CTA_MAX,
3003 .policy = ct_nla_policy },
392025f8
PNA		 3004 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
3005 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
d871befe
PNA		 3006 [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying },
3007 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed },
c1d10adb
PNA		 3008};
3009
7c8d4cb4 3010static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
c1d10adb 3011 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
f73e924c
PM		 3012 .attr_count = CTA_EXPECT_MAX,
3013 .policy = exp_nla_policy },
c1d10adb 3014 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
f73e924c
PM		 3015 .attr_count = CTA_EXPECT_MAX,
3016 .policy = exp_nla_policy },
c1d10adb 3017 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
f73e924c
PM		 3018 .attr_count = CTA_EXPECT_MAX,
3019 .policy = exp_nla_policy },
392025f8 3020 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
c1d10adb
PNA		 3021};
3022
7c8d4cb4 3023static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 3024 .name = "conntrack",
3025 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3026 .cb_count = IPCTNL_MSG_MAX,
3027 .cb = ctnl_cb,
3028};
3029
7c8d4cb4 3030static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 3031 .name = "conntrack_expect",
3032 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3033 .cb_count = IPCTNL_MSG_EXP_MAX,
3034 .cb = ctnl_exp_cb,
3035};
3036
d2483dde 3037MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 3038MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 3039MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 3040
70e9942f
PNA		 3041static int __net_init ctnetlink_net_init(struct net *net)
3042{
3043#ifdef CONFIG_NF_CONNTRACK_EVENTS
3044 int ret;
3045
3046 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
3047 if (ret < 0) {
3048 pr_err("ctnetlink_init: cannot register notifier.\n");
3049 goto err_out;
3050 }
3051
3052 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
3053 if (ret < 0) {
3054 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3055 goto err_unreg_notifier;
3056 }
3057#endif
3058 return 0;
3059
3060#ifdef CONFIG_NF_CONNTRACK_EVENTS
3061err_unreg_notifier:
3062 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3063err_out:
3064 return ret;
3065#endif
3066}
3067
3068static void ctnetlink_net_exit(struct net *net)
3069{
3070#ifdef CONFIG_NF_CONNTRACK_EVENTS
3071 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
3072 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3073#endif
3074}
3075
3076static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
3077{
3078 struct net *net;
3079
3080 list_for_each_entry(net, net_exit_list, exit_list)
3081 ctnetlink_net_exit(net);
3082}
3083
3084static struct pernet_operations ctnetlink_net_ops = {
3085 .init = ctnetlink_net_init,
3086 .exit_batch = ctnetlink_net_exit_batch,
3087};
3088
c1d10adb
PNA		 3089static int __init ctnetlink_init(void)
3090{
3091 int ret;
3092
654d0fbd 3093 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
c1d10adb
PNA		 3094 ret = nfnetlink_subsys_register(&ctnl_subsys);
3095 if (ret < 0) {
654d0fbd 3096 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 3097 goto err_out;
3098 }
3099
3100 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3101 if (ret < 0) {
654d0fbd 3102 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 3103 goto err_unreg_subsys;
3104 }
3105
ef6acf68
JL		 3106 ret = register_pernet_subsys(&ctnetlink_net_ops);
3107 if (ret < 0) {
70e9942f 3108 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 3109 goto err_unreg_exp_subsys;
3110 }
7c622345 3111#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 3112 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3113 RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook);
3114#endif
c1d10adb
PNA		 3115 return 0;
3116
c1d10adb
PNA		 3117err_unreg_exp_subsys:
3118 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 3119err_unreg_subsys:
3120 nfnetlink_subsys_unregister(&ctnl_subsys);
3121err_out:
3122 return ret;
3123}
3124
3125static void __exit ctnetlink_exit(void)
3126{
654d0fbd 3127 pr_info("ctnetlink: unregistering from nfnetlink.\n");
c1d10adb 3128
70e9942f 3129 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 3130 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3131 nfnetlink_subsys_unregister(&ctnl_subsys);
7c622345 3132#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 3133 RCU_INIT_POINTER(nfq_ct_hook, NULL);
3134#endif
09ab11eb 3135 synchronize_rcu();
c1d10adb
PNA		 3136}
3137
3138module_init(ctnetlink_init);
3139module_exit(ctnetlink_exit);
kernel source for telekom puls (alcatel/mediatek)