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Merge tag 'x86-apic-2024-03-10' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.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>
3c791076 32#include <linux/siphash.h>
c1d10adb
PNA		 33
34#include <linux/netfilter.h>
dc5fc579 35#include <net/netlink.h>
9592a5c0 36#include <net/sock.h>
c1d10adb
PNA		 37#include <net/netfilter/nf_conntrack.h>
38#include <net/netfilter/nf_conntrack_core.h>
77ab9cff 39#include <net/netfilter/nf_conntrack_expect.h>
c1d10adb 40#include <net/netfilter/nf_conntrack_helper.h>
41d73ec0 41#include <net/netfilter/nf_conntrack_seqadj.h>
605dcad6 42#include <net/netfilter/nf_conntrack_l4proto.h>
5b1158e9 43#include <net/netfilter/nf_conntrack_tuple.h>
58401572 44#include <net/netfilter/nf_conntrack_acct.h>
ef00f89f 45#include <net/netfilter/nf_conntrack_zones.h>
a992ca2a 46#include <net/netfilter/nf_conntrack_timestamp.h>
c539f017 47#include <net/netfilter/nf_conntrack_labels.h>
87e94dbc 48#include <net/netfilter/nf_conntrack_synproxy.h>
4806e975 49#if IS_ENABLED(CONFIG_NF_NAT)
d2c5c103 50#include <net/netfilter/nf_nat.h>
8c88f87c 51#include <net/netfilter/nf_nat_helper.h>
5b1158e9 52#endif
c1d10adb
PNA		 53
54#include <linux/netfilter/nfnetlink.h>
55#include <linux/netfilter/nfnetlink_conntrack.h>
56
cb8aa9a3
RB		 57#include "nf_internals.h"
58
c1d10adb 59MODULE_LICENSE("GPL");
94090b23 60MODULE_DESCRIPTION("List and change connection tracking table");
c1d10adb 61
5948ed29
FW		 62struct ctnetlink_list_dump_ctx {
63 struct nf_conn *last;
64 unsigned int cpu;
65 bool done;
66};
67
4054ff45 68static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
2a04aabf
JL		 69 const struct nf_conntrack_tuple *tuple,
70 const struct nf_conntrack_l4proto *l4proto)
c1d10adb 71{
c1d10adb 72 int ret = 0;
df6fb868 73 struct nlattr *nest_parms;
c1d10adb 74
ae0be8de 75 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO);
df6fb868
PM		 76 if (!nest_parms)
77 goto nla_put_failure;
cc1eb431
DM		 78 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
79 goto nla_put_failure;
c1d10adb 80
fdf70832
PM		 81 if (likely(l4proto->tuple_to_nlattr))
82 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 83
df6fb868 84 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 85
86 return ret;
87
df6fb868 88nla_put_failure:
c1d10adb
PNA		 89 return -1;
90}
91
f957be9d
FW		 92static int ipv4_tuple_to_nlattr(struct sk_buff *skb,
93 const struct nf_conntrack_tuple *tuple)
94{
95 if (nla_put_in_addr(skb, CTA_IP_V4_SRC, tuple->src.u3.ip) ||
96 nla_put_in_addr(skb, CTA_IP_V4_DST, tuple->dst.u3.ip))
97 return -EMSGSIZE;
98 return 0;
99}
100
101static int ipv6_tuple_to_nlattr(struct sk_buff *skb,
102 const struct nf_conntrack_tuple *tuple)
103{
104 if (nla_put_in6_addr(skb, CTA_IP_V6_SRC, &tuple->src.u3.in6) ||
105 nla_put_in6_addr(skb, CTA_IP_V6_DST, &tuple->dst.u3.in6))
106 return -EMSGSIZE;
107 return 0;
108}
109
4054ff45 110static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
f957be9d 111 const struct nf_conntrack_tuple *tuple)
c1d10adb 112{
c1d10adb 113 int ret = 0;
df6fb868
PM		 114 struct nlattr *nest_parms;
115
ae0be8de 116 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP);
df6fb868
PM		 117 if (!nest_parms)
118 goto nla_put_failure;
1cde6436 119
f957be9d
FW		 120 switch (tuple->src.l3num) {
121 case NFPROTO_IPV4:
122 ret = ipv4_tuple_to_nlattr(skb, tuple);
123 break;
124 case NFPROTO_IPV6:
125 ret = ipv6_tuple_to_nlattr(skb, tuple);
126 break;
127 }
1cde6436 128
df6fb868 129 nla_nest_end(skb, nest_parms);
c1d10adb 130
1cde6436
PNA		 131 return ret;
132
df6fb868 133nla_put_failure:
1cde6436
PNA		 134 return -1;
135}
136
4054ff45
PNA		 137static int ctnetlink_dump_tuples(struct sk_buff *skb,
138 const struct nf_conntrack_tuple *tuple)
1cde6436 139{
b3480fe0 140 const struct nf_conntrack_l4proto *l4proto;
1cde6436 141 int ret;
1cde6436 142
3b988ece 143 rcu_read_lock();
f957be9d 144 ret = ctnetlink_dump_tuples_ip(skb, tuple);
c1d10adb 145
3b988ece 146 if (ret >= 0) {
4a60dc74 147 l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
3b988ece
HS		 148 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
149 }
150 rcu_read_unlock();
c1d10adb 151 return ret;
c1d10adb
PNA		 152}
153
4054ff45
PNA		 154static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
155 const struct nf_conntrack_zone *zone, int dir)
deedb590
DB		 156{
157 if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
158 return 0;
159 if (nla_put_be16(skb, attrtype, htons(zone->id)))
160 goto nla_put_failure;
161 return 0;
162
163nla_put_failure:
164 return -1;
165}
166
4054ff45 167static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 168{
cc1eb431
DM		 169 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
170 goto nla_put_failure;
c1d10adb
PNA		 171 return 0;
172
df6fb868 173nla_put_failure:
c1d10adb
PNA		 174 return -1;
175}
176
86d21fc7
FW		 177static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct,
178 bool skip_zero)
c1d10adb 179{
73db1b8f
TBS		 180 long timeout;
181
182 if (nf_ct_is_confirmed(ct))
183 timeout = nf_ct_expires(ct) / HZ;
184 else
185 timeout = ct->timeout / HZ;
601e68e1 186
86d21fc7
FW		 187 if (skip_zero && timeout == 0)
188 return 0;
189
cc1eb431
DM		 190 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
191 goto nla_put_failure;
c1d10adb
PNA		 192 return 0;
193
df6fb868 194nla_put_failure:
c1d10adb
PNA		 195 return -1;
196}
197
86d21fc7
FW		 198static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct,
199 bool destroy)
c1d10adb 200{
b3480fe0 201 const struct nf_conntrack_l4proto *l4proto;
df6fb868 202 struct nlattr *nest_proto;
c1d10adb
PNA		 203 int ret;
204
4a60dc74 205 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
528a3a6f 206 if (!l4proto->to_nlattr)
c1d10adb 207 return 0;
601e68e1 208
ae0be8de 209 nest_proto = nla_nest_start(skb, CTA_PROTOINFO);
df6fb868
PM		 210 if (!nest_proto)
211 goto nla_put_failure;
c1d10adb 212
86d21fc7 213 ret = l4proto->to_nlattr(skb, nest_proto, ct, destroy);
c1d10adb 214
df6fb868 215 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 216
217 return ret;
218
df6fb868 219nla_put_failure:
c1d10adb
PNA		 220 return -1;
221}
222
4054ff45
PNA		 223static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
224 const struct nf_conn *ct)
c1d10adb 225{
df6fb868 226 struct nlattr *nest_helper;
dc808fe2 227 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 228 struct nf_conntrack_helper *helper;
c1d10adb 229
3c158f7f 230 if (!help)
c1d10adb 231 return 0;
601e68e1 232
c23a9fd2 233 rcu_read_lock();
3c158f7f
PM		 234 helper = rcu_dereference(help->helper);
235 if (!helper)
236 goto out;
237
ae0be8de 238 nest_helper = nla_nest_start(skb, CTA_HELP);
df6fb868
PM		 239 if (!nest_helper)
240 goto nla_put_failure;
cc1eb431
DM		 241 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
242 goto nla_put_failure;
c1d10adb 243
fdf70832
PM		 244 if (helper->to_nlattr)
245 helper->to_nlattr(skb, ct);
c1d10adb 246
df6fb868 247 nla_nest_end(skb, nest_helper);
3c158f7f 248out:
c23a9fd2 249 rcu_read_unlock();
c1d10adb
PNA		 250 return 0;
251
df6fb868 252nla_put_failure:
c23a9fd2 253 rcu_read_unlock();
c1d10adb
PNA		 254 return -1;
255}
256
bb5cf80e 257static int
4542fa47
HE		 258dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
259 enum ip_conntrack_dir dir, int type)
c1d10adb 260{
4542fa47
HE		 261 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
262 struct nf_conn_counter *counter = acct->counter;
df6fb868 263 struct nlattr *nest_count;
4542fa47 264 u64 pkts, bytes;
c1d10adb 265
4542fa47
HE		 266 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
267 pkts = atomic64_xchg(&counter[dir].packets, 0);
268 bytes = atomic64_xchg(&counter[dir].bytes, 0);
269 } else {
270 pkts = atomic64_read(&counter[dir].packets);
271 bytes = atomic64_read(&counter[dir].bytes);
272 }
273
ae0be8de 274 nest_count = nla_nest_start(skb, attr);
df6fb868
PM		 275 if (!nest_count)
276 goto nla_put_failure;
277
b46f6ded
ND		 278 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
279 CTA_COUNTERS_PAD) ||
280 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
281 CTA_COUNTERS_PAD))
cc1eb431 282 goto nla_put_failure;
c1d10adb 283
df6fb868 284 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 285
286 return 0;
287
df6fb868 288nla_put_failure:
c1d10adb
PNA		 289 return -1;
290}
c1d10adb 291
80e60e67 292static int
4542fa47 293ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
80e60e67 294{
4542fa47 295 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
80e60e67 296
80e60e67
PNA		 297 if (!acct)
298 return 0;
299
4542fa47
HE		 300 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
301 return -1;
302 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
303 return -1;
304
305 return 0;
80e60e67
PNA		 306}
307
a992ca2a
PNA		 308static int
309ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
310{
311 struct nlattr *nest_count;
312 const struct nf_conn_tstamp *tstamp;
313
314 tstamp = nf_conn_tstamp_find(ct);
315 if (!tstamp)
316 return 0;
317
ae0be8de 318 nest_count = nla_nest_start(skb, CTA_TIMESTAMP);
a992ca2a
PNA		 319 if (!nest_count)
320 goto nla_put_failure;
321
b46f6ded
ND		 322 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
323 CTA_TIMESTAMP_PAD) ||
cc1eb431 324 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
b46f6ded
ND		 325 cpu_to_be64(tstamp->stop),
326 CTA_TIMESTAMP_PAD)))
cc1eb431 327 goto nla_put_failure;
a992ca2a
PNA		 328 nla_nest_end(skb, nest_count);
329
330 return 0;
331
332nla_put_failure:
333 return -1;
334}
335
c1d10adb 336#ifdef CONFIG_NF_CONNTRACK_MARK
9f7dd42f
ID		 337static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct,
338 bool dump)
c1d10adb 339{
1feeae07
PNA		 340 u32 mark = READ_ONCE(ct->mark);
341
9f7dd42f 342 if (!mark && !dump)
1feeae07
PNA		 343 return 0;
344
52d1aa8b 345 if (nla_put_be32(skb, CTA_MARK, htonl(mark)))
cc1eb431 346 goto nla_put_failure;
c1d10adb
PNA		 347 return 0;
348
df6fb868 349nla_put_failure:
c1d10adb
PNA		 350 return -1;
351}
352#else
9f7dd42f 353#define ctnetlink_dump_mark(a, b, c) (0)
c1d10adb
PNA		 354#endif
355
37fccd85 356#ifdef CONFIG_NF_CONNTRACK_SECMARK
4054ff45 357static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 358{
1cc63249
EP		 359 struct nlattr *nest_secctx;
360 int len, ret;
361 char *secctx;
362
363 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
364 if (ret)
cba85b53 365 return 0;
1cc63249
EP		 366
367 ret = -1;
ae0be8de 368 nest_secctx = nla_nest_start(skb, CTA_SECCTX);
1cc63249
EP		 369 if (!nest_secctx)
370 goto nla_put_failure;
37fccd85 371
cc1eb431
DM		 372 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
373 goto nla_put_failure;
1cc63249
EP		 374 nla_nest_end(skb, nest_secctx);
375
376 ret = 0;
37fccd85 377nla_put_failure:
1cc63249
EP		 378 security_release_secctx(secctx, len);
379 return ret;
37fccd85
PNA		 380}
381#else
1cc63249 382#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 383#endif
384
0ceabd83 385#ifdef CONFIG_NF_CONNTRACK_LABELS
4a96300c 386static inline int ctnetlink_label_size(const struct nf_conn *ct)
0ceabd83
FW		 387{
388 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
389
390 if (!labels)
391 return 0;
23014011 392 return nla_total_size(sizeof(labels->bits));
0ceabd83
FW		 393}
394
395static int
396ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
397{
398 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
23014011 399 unsigned int i;
0ceabd83
FW		 400
401 if (!labels)
402 return 0;
403
0ceabd83
FW		 404 i = 0;
405 do {
406 if (labels->bits[i] != 0)
23014011
FW		 407 return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
408 labels->bits);
0ceabd83 409 i++;
23014011 410 } while (i < ARRAY_SIZE(labels->bits));
0ceabd83
FW		 411
412 return 0;
413}
414#else
415#define ctnetlink_dump_labels(a, b) (0)
416#define ctnetlink_label_size(a) (0)
417#endif
418
0f417ce9
PNA		 419#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
420
4054ff45 421static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
0f417ce9
PNA		 422{
423 struct nlattr *nest_parms;
424
425 if (!(ct->status & IPS_EXPECTED))
426 return 0;
427
ae0be8de 428 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER);
0f417ce9
PNA		 429 if (!nest_parms)
430 goto nla_put_failure;
431 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
432 goto nla_put_failure;
433 nla_nest_end(skb, nest_parms);
434
435 return 0;
436
437nla_put_failure:
438 return -1;
439}
440
bb5cf80e 441static int
41d73ec0 442dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
13eae15a 443{
13eae15a
PNA		 444 struct nlattr *nest_parms;
445
ae0be8de 446 nest_parms = nla_nest_start(skb, type);
13eae15a
PNA		 447 if (!nest_parms)
448 goto nla_put_failure;
449
41d73ec0
PM		 450 if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
451 htonl(seq->correction_pos)) ||
452 nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
453 htonl(seq->offset_before)) ||
454 nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
455 htonl(seq->offset_after)))
cc1eb431 456 goto nla_put_failure;
13eae15a
PNA		 457
458 nla_nest_end(skb, nest_parms);
459
460 return 0;
461
462nla_put_failure:
463 return -1;
464}
465
64f3967c 466static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, struct nf_conn *ct)
13eae15a 467{
41d73ec0
PM		 468 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
469 struct nf_ct_seqadj *seq;
13eae15a 470
41d73ec0 471 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
13eae15a
PNA		 472 return 0;
473
64f3967c 474 spin_lock_bh(&ct->lock);
41d73ec0
PM		 475 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
476 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
64f3967c 477 goto err;
13eae15a 478
41d73ec0
PM		 479 seq = &seqadj->seq[IP_CT_DIR_REPLY];
480 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
64f3967c 481 goto err;
13eae15a 482
64f3967c 483 spin_unlock_bh(&ct->lock);
13eae15a 484 return 0;
64f3967c
LZ		 485err:
486 spin_unlock_bh(&ct->lock);
487 return -1;
13eae15a 488}
13eae15a 489
20710b3b
PNA		 490static int ctnetlink_dump_ct_synproxy(struct sk_buff *skb, struct nf_conn *ct)
491{
492 struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
493 struct nlattr *nest_parms;
494
495 if (!synproxy)
496 return 0;
497
ae0be8de 498 nest_parms = nla_nest_start(skb, CTA_SYNPROXY);
20710b3b
PNA		 499 if (!nest_parms)
500 goto nla_put_failure;
501
502 if (nla_put_be32(skb, CTA_SYNPROXY_ISN, htonl(synproxy->isn)) ||
503 nla_put_be32(skb, CTA_SYNPROXY_ITS, htonl(synproxy->its)) ||
504 nla_put_be32(skb, CTA_SYNPROXY_TSOFF, htonl(synproxy->tsoff)))
505 goto nla_put_failure;
506
507 nla_nest_end(skb, nest_parms);
508
509 return 0;
510
511nla_put_failure:
512 return -1;
513}
514
4054ff45 515static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 516{
3c791076
FW		 517 __be32 id = (__force __be32)nf_ct_get_id(ct);
518
519 if (nla_put_be32(skb, CTA_ID, id))
cc1eb431 520 goto nla_put_failure;
c1d10adb
PNA		 521 return 0;
522
df6fb868 523nla_put_failure:
c1d10adb
PNA		 524 return -1;
525}
526
4054ff45 527static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 528{
71977437 529 if (nla_put_be32(skb, CTA_USE, htonl(refcount_read(&ct->ct_general.use))))
cc1eb431 530 goto nla_put_failure;
c1d10adb
PNA		 531 return 0;
532
df6fb868 533nla_put_failure:
c1d10adb
PNA		 534 return -1;
535}
536
49ca022b
FW		 537/* all these functions access ct->ext. Caller must either hold a reference
538 * on ct or prevent its deletion by holding either the bucket spinlock or
539 * pcpu dying list lock.
540 */
541static int ctnetlink_dump_extinfo(struct sk_buff *skb,
542 struct nf_conn *ct, u32 type)
543{
544 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
545 ctnetlink_dump_timestamp(skb, ct) < 0 ||
546 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
547 ctnetlink_dump_labels(skb, ct) < 0 ||
548 ctnetlink_dump_ct_seq_adj(skb, ct) < 0 ||
549 ctnetlink_dump_ct_synproxy(skb, ct) < 0)
550 return -1;
551
552 return 0;
553}
554
555static int ctnetlink_dump_info(struct sk_buff *skb, struct nf_conn *ct)
556{
557 if (ctnetlink_dump_status(skb, ct) < 0 ||
9f7dd42f 558 ctnetlink_dump_mark(skb, ct, true) < 0 ||
49ca022b
FW		 559 ctnetlink_dump_secctx(skb, ct) < 0 ||
560 ctnetlink_dump_id(skb, ct) < 0 ||
561 ctnetlink_dump_use(skb, ct) < 0 ||
562 ctnetlink_dump_master(skb, ct) < 0)
563 return -1;
564
565 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status) &&
86d21fc7
FW		 566 (ctnetlink_dump_timeout(skb, ct, false) < 0 ||
567 ctnetlink_dump_protoinfo(skb, ct, false) < 0))
49ca022b
FW		 568 return -1;
569
570 return 0;
571}
572
c1d10adb 573static int
15e47304 574ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
cb8aa9a3 575 struct nf_conn *ct, bool extinfo, unsigned int flags)
c1d10adb 576{
308ac914 577 const struct nf_conntrack_zone *zone;
c1d10adb 578 struct nlmsghdr *nlh;
df6fb868 579 struct nlattr *nest_parms;
cb8aa9a3 580 unsigned int event;
c1d10adb 581
cb8aa9a3
RB		 582 if (portid)
583 flags |= NLM_F_MULTI;
dedb67c4 584 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW);
19c28b13
PNA		 585 nlh = nfnl_msg_put(skb, portid, seq, event, flags, nf_ct_l3num(ct),
586 NFNETLINK_V0, 0);
587 if (!nlh)
96bcf938 588 goto nlmsg_failure;
c1d10adb 589
deedb590
DB		 590 zone = nf_ct_zone(ct);
591
ae0be8de 592 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
df6fb868
PM		 593 if (!nest_parms)
594 goto nla_put_failure;
f2f3e38c 595 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 596 goto nla_put_failure;
deedb590
DB		 597 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
598 NF_CT_ZONE_DIR_ORIG) < 0)
599 goto nla_put_failure;
df6fb868 600 nla_nest_end(skb, nest_parms);
601e68e1 601
ae0be8de 602 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
df6fb868
PM		 603 if (!nest_parms)
604 goto nla_put_failure;
f2f3e38c 605 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 606 goto nla_put_failure;
deedb590
DB		 607 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
608 NF_CT_ZONE_DIR_REPL) < 0)
609 goto nla_put_failure;
df6fb868 610 nla_nest_end(skb, nest_parms);
c1d10adb 611
deedb590
DB		 612 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
613 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 614 goto nla_put_failure;
ef00f89f 615
49ca022b 616 if (ctnetlink_dump_info(skb, ct) < 0)
df6fb868 617 goto nla_put_failure;
49ca022b 618 if (extinfo && ctnetlink_dump_extinfo(skb, ct, type) < 0)
b067fa00
PNA		 619 goto nla_put_failure;
620
96bcf938 621 nlmsg_end(skb, nlh);
c1d10adb
PNA		 622 return skb->len;
623
624nlmsg_failure:
df6fb868 625nla_put_failure:
96bcf938 626 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 627 return -1;
628}
629
f957be9d
FW		 630static const struct nla_policy cta_ip_nla_policy[CTA_IP_MAX + 1] = {
631 [CTA_IP_V4_SRC] = { .type = NLA_U32 },
632 [CTA_IP_V4_DST] = { .type = NLA_U32 },
633 [CTA_IP_V6_SRC] = { .len = sizeof(__be32) * 4 },
634 [CTA_IP_V6_DST] = { .len = sizeof(__be32) * 4 },
635};
636
8252fcea 637#if defined(CONFIG_NETFILTER_NETLINK_GLUE_CT) || defined(CONFIG_NF_CONNTRACK_EVENTS)
5caaed15 638static size_t ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4 639{
b3480fe0 640 const struct nf_conntrack_l4proto *l4proto;
5caaed15 641 size_t len, len4 = 0;
03b64f51 642
f957be9d 643 len = nla_policy_len(cta_ip_nla_policy, CTA_IP_MAX + 1);
0d035100 644 len *= 3u; /* ORIG, REPLY, MASTER */
03b64f51 645
4a60dc74 646 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
39215846 647 len += l4proto->nlattr_size;
5caaed15
FW		 648 if (l4proto->nlattr_tuple_size) {
649 len4 = l4proto->nlattr_tuple_size();
650 len4 *= 3u; /* ORIG, REPLY, MASTER */
651 }
03b64f51 652
5caaed15 653 return len + len4;
03b64f51 654}
8252fcea 655#endif
03b64f51 656
4a96300c 657static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
d26e6a02
JP		 658{
659 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
660 return 0;
661 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
b46f6ded
ND		 662 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
663 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
d26e6a02
JP		 664 ;
665}
666
4a96300c 667static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 668{
cba85b53
PNA		 669#ifdef CONFIG_NF_CONNTRACK_SECMARK
670 int len, ret;
1cc63249 671
cba85b53
PNA		 672 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
673 if (ret)
674 return 0;
1cc63249 675
cba85b53
PNA		 676 return nla_total_size(0) /* CTA_SECCTX */
677 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
678#else
679 return 0;
1cc63249 680#endif
cba85b53 681}
1cc63249 682
4a96300c 683static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
a992ca2a
PNA		 684{
685#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
686 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
687 return 0;
b46f6ded 688 return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
a992ca2a
PNA		 689#else
690 return 0;
691#endif
692}
693
4054ff45
PNA		 694#ifdef CONFIG_NF_CONNTRACK_EVENTS
695static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
03b64f51
PNA		 696{
697 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
698 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
699 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
700 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
701 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
702 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
703 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
f7b13e43 704 + ctnetlink_acct_size(ct)
a992ca2a 705 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 706 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
707 + nla_total_size(0) /* CTA_PROTOINFO */
708 + nla_total_size(0) /* CTA_HELP */
709 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 710 + ctnetlink_secctx_size(ct)
4806e975 711#if IS_ENABLED(CONFIG_NF_NAT)
03b64f51
PNA		 712 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
713 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 714#endif
715#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 716 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 717#endif
718#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 719 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
d271e8bd 720#endif
03b64f51 721 + ctnetlink_proto_size(ct)
0ceabd83 722 + ctnetlink_label_size(ct)
03b64f51 723 ;
2732c4e4
HE		 724}
725
e34d5c1a 726static int
478374a3 727ctnetlink_conntrack_event(unsigned int events, const struct nf_ct_event *item)
c1d10adb 728{
308ac914 729 const struct nf_conntrack_zone *zone;
9592a5c0 730 struct net *net;
c1d10adb 731 struct nlmsghdr *nlh;
df6fb868 732 struct nlattr *nest_parms;
19abb7b0 733 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 734 struct sk_buff *skb;
735 unsigned int type;
c1d10adb 736 unsigned int flags = 0, group;
dd7669a9 737 int err;
c1d10adb 738
a0891aa6 739 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 740 type = IPCTNL_MSG_CT_DELETE;
741 group = NFNLGRP_CONNTRACK_DESTROY;
04b80cea 742 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 743 type = IPCTNL_MSG_CT_NEW;
744 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 745 group = NFNLGRP_CONNTRACK_NEW;
04b80cea 746 } else if (events) {
c1d10adb
PNA		 747 type = IPCTNL_MSG_CT_NEW;
748 group = NFNLGRP_CONNTRACK_UPDATE;
749 } else
e34d5c1a 750 return 0;
a2427692 751
9592a5c0
AD		 752 net = nf_ct_net(ct);
753 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 754 return 0;
a2427692 755
03b64f51
PNA		 756 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
757 if (skb == NULL)
150ace0d 758 goto errout;
c1d10adb 759
dedb67c4 760 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type);
19c28b13
PNA		 761 nlh = nfnl_msg_put(skb, item->portid, 0, type, flags, nf_ct_l3num(ct),
762 NFNETLINK_V0, 0);
763 if (!nlh)
96bcf938 764 goto nlmsg_failure;
c1d10adb 765
deedb590
DB		 766 zone = nf_ct_zone(ct);
767
ae0be8de 768 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
df6fb868
PM		 769 if (!nest_parms)
770 goto nla_put_failure;
f2f3e38c 771 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 772 goto nla_put_failure;
deedb590
DB		 773 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
774 NF_CT_ZONE_DIR_ORIG) < 0)
775 goto nla_put_failure;
df6fb868 776 nla_nest_end(skb, nest_parms);
601e68e1 777
ae0be8de 778 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
df6fb868
PM		 779 if (!nest_parms)
780 goto nla_put_failure;
f2f3e38c 781 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 782 goto nla_put_failure;
deedb590
DB		 783 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
784 NF_CT_ZONE_DIR_REPL) < 0)
785 goto nla_put_failure;
df6fb868 786 nla_nest_end(skb, nest_parms);
c1d10adb 787
deedb590
DB		 788 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
789 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 790 goto nla_put_failure;
ef00f89f 791
1eedf699
EL		 792 if (ctnetlink_dump_id(skb, ct) < 0)
793 goto nla_put_failure;
794
e57dce60
FH		 795 if (ctnetlink_dump_status(skb, ct) < 0)
796 goto nla_put_failure;
797
a0891aa6 798 if (events & (1 << IPCT_DESTROY)) {
86d21fc7
FW		 799 if (ctnetlink_dump_timeout(skb, ct, true) < 0)
800 goto nla_put_failure;
801
4542fa47 802 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
86d21fc7
FW		 803 ctnetlink_dump_timestamp(skb, ct) < 0 ||
804 ctnetlink_dump_protoinfo(skb, ct, true) < 0)
df6fb868 805 goto nla_put_failure;
7b621c1e 806 } else {
86d21fc7 807 if (ctnetlink_dump_timeout(skb, ct, false) < 0)
df6fb868 808 goto nla_put_failure;
7b621c1e 809
86d21fc7
FW		 810 if (events & (1 << IPCT_PROTOINFO) &&
811 ctnetlink_dump_protoinfo(skb, ct, false) < 0)
df6fb868 812 goto nla_put_failure;
7b621c1e 813
a0891aa6 814 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 815 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 816 goto nla_put_failure;
7b621c1e 817
ff660c80 818#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 819 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 820 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 821 goto nla_put_failure;
ff660c80 822#endif
0ceabd83
FW		 823 if (events & (1 << IPCT_LABEL) &&
824 ctnetlink_dump_labels(skb, ct) < 0)
825 goto nla_put_failure;
7b621c1e 826
a0891aa6 827 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 828 ctnetlink_dump_master(skb, ct) < 0)
829 goto nla_put_failure;
830
41d73ec0
PM		 831 if (events & (1 << IPCT_SEQADJ) &&
832 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
13eae15a 833 goto nla_put_failure;
20710b3b
PNA		 834
835 if (events & (1 << IPCT_SYNPROXY) &&
836 ctnetlink_dump_ct_synproxy(skb, ct) < 0)
837 goto nla_put_failure;
7b621c1e 838 }
b9a37e0c 839
a83099a6 840#ifdef CONFIG_NF_CONNTRACK_MARK
9f7dd42f 841 if (ctnetlink_dump_mark(skb, ct, events & (1 << IPCT_MARK)))
a83099a6
EL		 842 goto nla_put_failure;
843#endif
96bcf938 844 nlmsg_end(skb, nlh);
15e47304 845 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 846 GFP_ATOMIC);
dd7669a9
PNA		 847 if (err == -ENOBUFS || err == -EAGAIN)
848 return -ENOBUFS;
849
e34d5c1a 850 return 0;
c1d10adb 851
df6fb868 852nla_put_failure:
96bcf938 853 nlmsg_cancel(skb, nlh);
528a3a6f 854nlmsg_failure:
c1d10adb 855 kfree_skb(skb);
150ace0d 856errout:
37b7ef72
PNA		 857 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
858 return -ENOBUFS;
859
e34d5c1a 860 return 0;
c1d10adb
PNA		 861}
862#endif /* CONFIG_NF_CONNTRACK_EVENTS */
863
864static int ctnetlink_done(struct netlink_callback *cb)
865{
89f2e218
PM		 866 if (cb->args[1])
867 nf_ct_put((struct nf_conn *)cb->args[1]);
397304b5 868 kfree(cb->data);
c1d10adb
PNA		 869 return 0;
870}
871
ff1199db
FW		 872struct ctnetlink_filter_u32 {
873 u32 val;
874 u32 mask;
875};
876
866476f3 877struct ctnetlink_filter {
59c08c69 878 u8 family;
fa173a1b 879 bool zone_filter;
cb8aa9a3
RB		 880
881 u_int32_t orig_flags;
882 u_int32_t reply_flags;
883
884 struct nf_conntrack_tuple orig;
885 struct nf_conntrack_tuple reply;
886 struct nf_conntrack_zone zone;
887
ff1199db 888 struct ctnetlink_filter_u32 mark;
9344988d 889 struct ctnetlink_filter_u32 status;
0f298a28
PNA		 890};
891
cb8aa9a3
RB		 892static const struct nla_policy cta_filter_nla_policy[CTA_FILTER_MAX + 1] = {
893 [CTA_FILTER_ORIG_FLAGS] = { .type = NLA_U32 },
894 [CTA_FILTER_REPLY_FLAGS] = { .type = NLA_U32 },
895};
896
897static int ctnetlink_parse_filter(const struct nlattr *attr,
898 struct ctnetlink_filter *filter)
899{
900 struct nlattr *tb[CTA_FILTER_MAX + 1];
901 int ret = 0;
902
903 ret = nla_parse_nested(tb, CTA_FILTER_MAX, attr, cta_filter_nla_policy,
904 NULL);
905 if (ret)
906 return ret;
907
908 if (tb[CTA_FILTER_ORIG_FLAGS]) {
909 filter->orig_flags = nla_get_u32(tb[CTA_FILTER_ORIG_FLAGS]);
910 if (filter->orig_flags & ~CTA_FILTER_F_ALL)
911 return -EOPNOTSUPP;
912 }
913
914 if (tb[CTA_FILTER_REPLY_FLAGS]) {
915 filter->reply_flags = nla_get_u32(tb[CTA_FILTER_REPLY_FLAGS]);
916 if (filter->reply_flags & ~CTA_FILTER_F_ALL)
917 return -EOPNOTSUPP;
918 }
919
920 return 0;
921}
922
923static int ctnetlink_parse_zone(const struct nlattr *attr,
924 struct nf_conntrack_zone *zone);
925static int ctnetlink_parse_tuple_filter(const struct nlattr * const cda[],
926 struct nf_conntrack_tuple *tuple,
927 u32 type, u_int8_t l3num,
928 struct nf_conntrack_zone *zone,
929 u_int32_t flags);
930
ff1199db
FW		 931static int ctnetlink_filter_parse_mark(struct ctnetlink_filter_u32 *mark,
932 const struct nlattr * const cda[])
933{
934#ifdef CONFIG_NF_CONNTRACK_MARK
935 if (cda[CTA_MARK]) {
936 mark->val = ntohl(nla_get_be32(cda[CTA_MARK]));
937
938 if (cda[CTA_MARK_MASK])
939 mark->mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
940 else
941 mark->mask = 0xffffffff;
942 } else if (cda[CTA_MARK_MASK]) {
943 return -EINVAL;
944 }
945#endif
946 return 0;
947}
948
9344988d
FW		 949static int ctnetlink_filter_parse_status(struct ctnetlink_filter_u32 *status,
950 const struct nlattr * const cda[])
951{
952 if (cda[CTA_STATUS]) {
953 status->val = ntohl(nla_get_be32(cda[CTA_STATUS]));
954 if (cda[CTA_STATUS_MASK])
955 status->mask = ntohl(nla_get_be32(cda[CTA_STATUS_MASK]));
956 else
957 status->mask = status->val;
958
959 /* status->val == 0? always true, else always false. */
960 if (status->mask == 0)
961 return -EINVAL;
962 } else if (cda[CTA_STATUS_MASK]) {
963 return -EINVAL;
964 }
965
966 /* CTA_STATUS is NLA_U32, if this fires UAPI needs to be extended */
967 BUILD_BUG_ON(__IPS_MAX_BIT >= 32);
968 return 0;
969}
970
866476f3 971static struct ctnetlink_filter *
59c08c69 972ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family)
866476f3 973{
866476f3 974 struct ctnetlink_filter *filter;
cb8aa9a3 975 int err;
866476f3 976
9306425b 977#ifndef CONFIG_NF_CONNTRACK_MARK
7c6b4121 978 if (cda[CTA_MARK] || cda[CTA_MARK_MASK])
9306425b
FW		 979 return ERR_PTR(-EOPNOTSUPP);
980#endif
981
866476f3
KE		 982 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
983 if (filter == NULL)
984 return ERR_PTR(-ENOMEM);
985
59c08c69
KE		 986 filter->family = family;
987
ff1199db
FW		 988 err = ctnetlink_filter_parse_mark(&filter->mark, cda);
989 if (err)
6c2d2176 990 goto err_filter;
ff1199db 991
9344988d
FW		 992 err = ctnetlink_filter_parse_status(&filter->status, cda);
993 if (err)
994 goto err_filter;
995
fa173a1b
FH		 996 if (cda[CTA_ZONE]) {
997 err = ctnetlink_parse_zone(cda[CTA_ZONE], &filter->zone);
998 if (err < 0)
999 goto err_filter;
1000 filter->zone_filter = true;
1001 }
cb8aa9a3 1002
eff3c558
FH		 1003 if (!cda[CTA_FILTER])
1004 return filter;
1005
cb8aa9a3
RB		 1006 err = ctnetlink_parse_filter(cda[CTA_FILTER], filter);
1007 if (err < 0)
6c2d2176 1008 goto err_filter;
cb8aa9a3
RB		 1009
1010 if (filter->orig_flags) {
6c2d2176
PNA		 1011 if (!cda[CTA_TUPLE_ORIG]) {
1012 err = -EINVAL;
1013 goto err_filter;
1014 }
cb8aa9a3
RB		 1015
1016 err = ctnetlink_parse_tuple_filter(cda, &filter->orig,
1017 CTA_TUPLE_ORIG,
1018 filter->family,
1019 &filter->zone,
1020 filter->orig_flags);
1021 if (err < 0)
6c2d2176 1022 goto err_filter;
cb8aa9a3
RB		 1023 }
1024
1025 if (filter->reply_flags) {
6c2d2176
PNA		 1026 if (!cda[CTA_TUPLE_REPLY]) {
1027 err = -EINVAL;
1028 goto err_filter;
1029 }
cb8aa9a3
RB		 1030
1031 err = ctnetlink_parse_tuple_filter(cda, &filter->reply,
1032 CTA_TUPLE_REPLY,
1033 filter->family,
1034 &filter->zone,
ad81d4da 1035 filter->reply_flags);
77522ff0 1036 if (err < 0)
6c2d2176 1037 goto err_filter;
cb8aa9a3
RB		 1038 }
1039
59c08c69 1040 return filter;
6c2d2176
PNA		 1041
1042err_filter:
1043 kfree(filter);
1044
1045 return ERR_PTR(err);
866476f3
KE		 1046}
1047
cb8aa9a3
RB		 1048static bool ctnetlink_needs_filter(u8 family, const struct nlattr * const *cda)
1049{
eff3c558 1050 return family || cda[CTA_MARK] || cda[CTA_FILTER] || cda[CTA_STATUS] || cda[CTA_ZONE];
cb8aa9a3
RB		 1051}
1052
3e673b23
FW		 1053static int ctnetlink_start(struct netlink_callback *cb)
1054{
1055 const struct nlattr * const *cda = cb->data;
1056 struct ctnetlink_filter *filter = NULL;
59c08c69
KE		 1057 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1058 u8 family = nfmsg->nfgen_family;
3e673b23 1059
cb8aa9a3 1060 if (ctnetlink_needs_filter(family, cda)) {
59c08c69 1061 filter = ctnetlink_alloc_filter(cda, family);
3e673b23
FW		 1062 if (IS_ERR(filter))
1063 return PTR_ERR(filter);
1064 }
1065
1066 cb->data = filter;
1067 return 0;
1068}
1069
cb8aa9a3
RB		 1070static int ctnetlink_filter_match_tuple(struct nf_conntrack_tuple *filter_tuple,
1071 struct nf_conntrack_tuple *ct_tuple,
1072 u_int32_t flags, int family)
1073{
1074 switch (family) {
1075 case NFPROTO_IPV4:
1076 if ((flags & CTA_FILTER_FLAG(CTA_IP_SRC)) &&
1077 filter_tuple->src.u3.ip != ct_tuple->src.u3.ip)
1078 return 0;
1079
1080 if ((flags & CTA_FILTER_FLAG(CTA_IP_DST)) &&
1081 filter_tuple->dst.u3.ip != ct_tuple->dst.u3.ip)
1082 return 0;
1083 break;
1084 case NFPROTO_IPV6:
1085 if ((flags & CTA_FILTER_FLAG(CTA_IP_SRC)) &&
1086 !ipv6_addr_cmp(&filter_tuple->src.u3.in6,
1087 &ct_tuple->src.u3.in6))
1088 return 0;
1089
1090 if ((flags & CTA_FILTER_FLAG(CTA_IP_DST)) &&
1091 !ipv6_addr_cmp(&filter_tuple->dst.u3.in6,
1092 &ct_tuple->dst.u3.in6))
1093 return 0;
1094 break;
1095 }
1096
1097 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)) &&
1098 filter_tuple->dst.protonum != ct_tuple->dst.protonum)
1099 return 0;
1100
1101 switch (ct_tuple->dst.protonum) {
1102 case IPPROTO_TCP:
1103 case IPPROTO_UDP:
1104 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_SRC_PORT)) &&
1105 filter_tuple->src.u.tcp.port != ct_tuple->src.u.tcp.port)
1106 return 0;
1107
1108 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_DST_PORT)) &&
1109 filter_tuple->dst.u.tcp.port != ct_tuple->dst.u.tcp.port)
1110 return 0;
1111 break;
1112 case IPPROTO_ICMP:
1113 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_TYPE)) &&
1114 filter_tuple->dst.u.icmp.type != ct_tuple->dst.u.icmp.type)
1115 return 0;
1116 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_CODE)) &&
1117 filter_tuple->dst.u.icmp.code != ct_tuple->dst.u.icmp.code)
1118 return 0;
1119 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_ID)) &&
1120 filter_tuple->src.u.icmp.id != ct_tuple->src.u.icmp.id)
1121 return 0;
1122 break;
1123 case IPPROTO_ICMPV6:
1124 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_TYPE)) &&
1125 filter_tuple->dst.u.icmp.type != ct_tuple->dst.u.icmp.type)
1126 return 0;
1127 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_CODE)) &&
1128 filter_tuple->dst.u.icmp.code != ct_tuple->dst.u.icmp.code)
1129 return 0;
1130 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_ID)) &&
1131 filter_tuple->src.u.icmp.id != ct_tuple->src.u.icmp.id)
1132 return 0;
1133 break;
1134 }
1135
1136 return 1;
1137}
1138
866476f3
KE		 1139static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
1140{
1141 struct ctnetlink_filter *filter = data;
cb8aa9a3 1142 struct nf_conntrack_tuple *tuple;
9344988d 1143 u32 status;
866476f3
KE		 1144
1145 if (filter == NULL)
59c08c69
KE		 1146 goto out;
1147
1148 /* Match entries of a given L3 protocol number.
1149 * If it is not specified, ie. l3proto == 0,
1150 * then match everything.
1151 */
1152 if (filter->family && nf_ct_l3num(ct) != filter->family)
1153 goto ignore_entry;
866476f3 1154
fa173a1b 1155 if (filter->zone_filter &&
eff3c558
FH		 1156 !nf_ct_zone_equal_any(ct, &filter->zone))
1157 goto ignore_entry;
1158
cb8aa9a3
RB		 1159 if (filter->orig_flags) {
1160 tuple = nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL);
1161 if (!ctnetlink_filter_match_tuple(&filter->orig, tuple,
1162 filter->orig_flags,
1163 filter->family))
1164 goto ignore_entry;
1165 }
1166
1167 if (filter->reply_flags) {
1168 tuple = nf_ct_tuple(ct, IP_CT_DIR_REPLY);
1169 if (!ctnetlink_filter_match_tuple(&filter->reply, tuple,
1170 filter->reply_flags,
1171 filter->family))
1172 goto ignore_entry;
1173 }
1174
866476f3 1175#ifdef CONFIG_NF_CONNTRACK_MARK
52d1aa8b 1176 if ((READ_ONCE(ct->mark) & filter->mark.mask) != filter->mark.val)
59c08c69 1177 goto ignore_entry;
866476f3 1178#endif
9344988d
FW		 1179 status = (u32)READ_ONCE(ct->status);
1180 if ((status & filter->status.mask) != filter->status.val)
1181 goto ignore_entry;
866476f3 1182
59c08c69
KE		 1183out:
1184 return 1;
1185
1186ignore_entry:
866476f3
KE		 1187 return 0;
1188}
1189
c1d10adb
PNA		 1190static int
1191ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
1192{
cb8aa9a3 1193 unsigned int flags = cb->data ? NLM_F_DUMP_FILTERED : 0;
9592a5c0 1194 struct net *net = sock_net(skb->sk);
89f2e218 1195 struct nf_conn *ct, *last;
c1d10adb 1196 struct nf_conntrack_tuple_hash *h;
ea781f19 1197 struct hlist_nulls_node *n;
2344d64e
FW		 1198 struct nf_conn *nf_ct_evict[8];
1199 int res, i;
93bb0ceb
JDB		 1200 spinlock_t *lockp;
1201
d205dc40 1202 last = (struct nf_conn *)cb->args[1];
2344d64e 1203 i = 0;
93bb0ceb
JDB		 1204
1205 local_bh_disable();
56d52d48 1206 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
89f2e218 1207restart:
2344d64e
FW		 1208 while (i) {
1209 i--;
1210 if (nf_ct_should_gc(nf_ct_evict[i]))
1211 nf_ct_kill(nf_ct_evict[i]);
1212 nf_ct_put(nf_ct_evict[i]);
1213 }
1214
93bb0ceb 1215 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
b16c2919 1216 nf_conntrack_lock(lockp);
56d52d48 1217 if (cb->args[0] >= nf_conntrack_htable_size) {
93bb0ceb
JDB		 1218 spin_unlock(lockp);
1219 goto out;
1220 }
56d52d48
FW		 1221 hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
1222 hnnode) {
c1d10adb 1223 ct = nf_ct_tuplehash_to_ctrack(h);
2344d64e 1224 if (nf_ct_is_expired(ct)) {
0ed8f619 1225 /* need to defer nf_ct_kill() until lock is released */
2344d64e 1226 if (i < ARRAY_SIZE(nf_ct_evict) &&
71977437 1227 refcount_inc_not_zero(&ct->ct_general.use))
2344d64e
FW		 1228 nf_ct_evict[i++] = ct;
1229 continue;
1230 }
1231
e0c7d472
FW		 1232 if (!net_eq(net, nf_ct_net(ct)))
1233 continue;
1234
76f12e63
FW		 1235 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
1236 continue;
1237
d205dc40
PM		 1238 if (cb->args[1]) {
1239 if (ct != last)
13ee6ac5 1240 continue;
d205dc40 1241 cb->args[1] = 0;
89f2e218 1242 }
866476f3 1243 if (!ctnetlink_filter_match(ct, cb->data))
0f298a28 1244 continue;
866476f3 1245
3b988ece 1246 res =
15e47304 1247 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 1248 cb->nlh->nlmsg_seq,
1249 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
cb8aa9a3 1250 ct, true, flags);
3b988ece 1251 if (res < 0) {
c71caf41 1252 nf_conntrack_get(&ct->ct_general);
89f2e218 1253 cb->args[1] = (unsigned long)ct;
93bb0ceb 1254 spin_unlock(lockp);
c1d10adb 1255 goto out;
89f2e218
PM		 1256 }
1257 }
93bb0ceb 1258 spin_unlock(lockp);
d205dc40 1259 if (cb->args[1]) {
89f2e218
PM		 1260 cb->args[1] = 0;
1261 goto restart;
c1d10adb
PNA		 1262 }
1263 }
89f2e218 1264out:
93bb0ceb 1265 local_bh_enable();
fefa9267
LZ		 1266 if (last) {
1267 /* nf ct hash resize happened, now clear the leftover. */
1268 if ((struct nf_conn *)cb->args[1] == last)
1269 cb->args[1] = 0;
1270
d205dc40 1271 nf_ct_put(last);
fefa9267 1272 }
c1d10adb 1273
2344d64e
FW		 1274 while (i) {
1275 i--;
1276 if (nf_ct_should_gc(nf_ct_evict[i]))
1277 nf_ct_kill(nf_ct_evict[i]);
1278 nf_ct_put(nf_ct_evict[i]);
1279 }
1280
c1d10adb
PNA		 1281 return skb->len;
1282}
1283
f957be9d 1284static int ipv4_nlattr_to_tuple(struct nlattr *tb[],
cb8aa9a3
RB		 1285 struct nf_conntrack_tuple *t,
1286 u_int32_t flags)
f957be9d 1287{
cb8aa9a3
RB		 1288 if (flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
1289 if (!tb[CTA_IP_V4_SRC])
1290 return -EINVAL;
1291
1292 t->src.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_SRC]);
1293 }
f957be9d 1294
cb8aa9a3
RB		 1295 if (flags & CTA_FILTER_FLAG(CTA_IP_DST)) {
1296 if (!tb[CTA_IP_V4_DST])
1297 return -EINVAL;
1298
1299 t->dst.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_DST]);
1300 }
f957be9d
FW		 1301
1302 return 0;
1303}
1304
1305static int ipv6_nlattr_to_tuple(struct nlattr *tb[],
cb8aa9a3
RB		 1306 struct nf_conntrack_tuple *t,
1307 u_int32_t flags)
f957be9d 1308{
cb8aa9a3
RB		 1309 if (flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
1310 if (!tb[CTA_IP_V6_SRC])
1311 return -EINVAL;
1312
1313 t->src.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_SRC]);
1314 }
f957be9d 1315
cb8aa9a3
RB		 1316 if (flags & CTA_FILTER_FLAG(CTA_IP_DST)) {
1317 if (!tb[CTA_IP_V6_DST])
1318 return -EINVAL;
1319
1320 t->dst.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_DST]);
1321 }
f957be9d
FW		 1322
1323 return 0;
1324}
1325
4054ff45 1326static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
cb8aa9a3
RB		 1327 struct nf_conntrack_tuple *tuple,
1328 u_int32_t flags)
c1d10adb 1329{
df6fb868 1330 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 1331 int ret = 0;
1332
0c805e80
LM		 1333 ret = nla_parse_nested_deprecated(tb, CTA_IP_MAX, attr,
1334 cta_ip_nla_policy, NULL);
130ffbc2
DB		 1335 if (ret < 0)
1336 return ret;
c1d10adb 1337
f957be9d
FW		 1338 switch (tuple->src.l3num) {
1339 case NFPROTO_IPV4:
cb8aa9a3 1340 ret = ipv4_nlattr_to_tuple(tb, tuple, flags);
f957be9d
FW		 1341 break;
1342 case NFPROTO_IPV6:
cb8aa9a3 1343 ret = ipv6_nlattr_to_tuple(tb, tuple, flags);
f957be9d 1344 break;
f73e924c 1345 }
c1d10adb 1346
c1d10adb
PNA		 1347 return ret;
1348}
1349
f73e924c
PM		 1350static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
1351 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 1352};
1353
4054ff45 1354static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
cb8aa9a3
RB		 1355 struct nf_conntrack_tuple *tuple,
1356 u_int32_t flags)
c1d10adb 1357{
b3480fe0 1358 const struct nf_conntrack_l4proto *l4proto;
df6fb868 1359 struct nlattr *tb[CTA_PROTO_MAX+1];
c1d10adb
PNA		 1360 int ret = 0;
1361
8cb08174
JB		 1362 ret = nla_parse_nested_deprecated(tb, CTA_PROTO_MAX, attr,
1363 proto_nla_policy, NULL);
f73e924c
PM		 1364 if (ret < 0)
1365 return ret;
c1d10adb 1366
cb8aa9a3
RB		 1367 if (!(flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)))
1368 return 0;
1369
df6fb868 1370 if (!tb[CTA_PROTO_NUM])
c1d10adb 1371 return -EINVAL;
cb8aa9a3 1372
77236b6e 1373 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 1374
cd91566e 1375 rcu_read_lock();
4a60dc74 1376 l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
c1d10adb 1377
f73e924c 1378 if (likely(l4proto->nlattr_to_tuple)) {
8cb08174
JB		 1379 ret = nla_validate_nested_deprecated(attr, CTA_PROTO_MAX,
1380 l4proto->nla_policy,
1381 NULL);
f73e924c 1382 if (ret == 0)
cb8aa9a3 1383 ret = l4proto->nlattr_to_tuple(tb, tuple, flags);
f73e924c 1384 }
c1d10adb 1385
cd91566e 1386 rcu_read_unlock();
601e68e1 1387
c1d10adb
PNA		 1388 return ret;
1389}
1390
deedb590
DB		 1391static int
1392ctnetlink_parse_zone(const struct nlattr *attr,
1393 struct nf_conntrack_zone *zone)
1394{
5e8018fc
DB		 1395 nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
1396 NF_CT_DEFAULT_ZONE_DIR, 0);
deedb590
DB		 1397#ifdef CONFIG_NF_CONNTRACK_ZONES
1398 if (attr)
1399 zone->id = ntohs(nla_get_be16(attr));
1400#else
1401 if (attr)
1402 return -EOPNOTSUPP;
1403#endif
1404 return 0;
1405}
1406
1407static int
1408ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
1409 struct nf_conntrack_zone *zone)
1410{
1411 int ret;
1412
1413 if (zone->id != NF_CT_DEFAULT_ZONE_ID)
1414 return -EINVAL;
1415
1416 ret = ctnetlink_parse_zone(attr, zone);
1417 if (ret < 0)
1418 return ret;
1419
1420 if (type == CTA_TUPLE_REPLY)
1421 zone->dir = NF_CT_ZONE_DIR_REPL;
1422 else
1423 zone->dir = NF_CT_ZONE_DIR_ORIG;
1424
1425 return 0;
1426}
1427
d0b0268f
PM		 1428static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
1429 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
1430 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
deedb590 1431 [CTA_TUPLE_ZONE] = { .type = NLA_U16 },
d0b0268f
PM		 1432};
1433
cb8aa9a3
RB		 1434#define CTA_FILTER_F_ALL_CTA_PROTO \
1435 (CTA_FILTER_F_CTA_PROTO_SRC_PORT | \
1436 CTA_FILTER_F_CTA_PROTO_DST_PORT | \
1437 CTA_FILTER_F_CTA_PROTO_ICMP_TYPE | \
1438 CTA_FILTER_F_CTA_PROTO_ICMP_CODE | \
1439 CTA_FILTER_F_CTA_PROTO_ICMP_ID | \
1440 CTA_FILTER_F_CTA_PROTO_ICMPV6_TYPE | \
1441 CTA_FILTER_F_CTA_PROTO_ICMPV6_CODE | \
1442 CTA_FILTER_F_CTA_PROTO_ICMPV6_ID)
1443
bb5cf80e 1444static int
cb8aa9a3
RB		 1445ctnetlink_parse_tuple_filter(const struct nlattr * const cda[],
1446 struct nf_conntrack_tuple *tuple, u32 type,
1447 u_int8_t l3num, struct nf_conntrack_zone *zone,
1448 u_int32_t flags)
c1d10adb 1449{
df6fb868 1450 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 1451 int err;
1452
c1d10adb
PNA		 1453 memset(tuple, 0, sizeof(*tuple));
1454
8cb08174
JB		 1455 err = nla_parse_nested_deprecated(tb, CTA_TUPLE_MAX, cda[type],
1456 tuple_nla_policy, NULL);
130ffbc2
DB		 1457 if (err < 0)
1458 return err;
c1d10adb 1459
1cc5ef91
WM		 1460 if (l3num != NFPROTO_IPV4 && l3num != NFPROTO_IPV6)
1461 return -EOPNOTSUPP;
c1d10adb
PNA		 1462 tuple->src.l3num = l3num;
1463
cb8aa9a3
RB		 1464 if (flags & CTA_FILTER_FLAG(CTA_IP_DST) ||
1465 flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
1466 if (!tb[CTA_TUPLE_IP])
1467 return -EINVAL;
c1d10adb 1468
cb8aa9a3
RB		 1469 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple, flags);
1470 if (err < 0)
1471 return err;
1472 }
c1d10adb 1473
cb8aa9a3
RB		 1474 if (flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)) {
1475 if (!tb[CTA_TUPLE_PROTO])
1476 return -EINVAL;
c1d10adb 1477
cb8aa9a3
RB		 1478 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple, flags);
1479 if (err < 0)
1480 return err;
1481 } else if (flags & CTA_FILTER_FLAG(ALL_CTA_PROTO)) {
1482 /* Can't manage proto flags without a protonum */
1483 return -EINVAL;
1484 }
1485
1486 if ((flags & CTA_FILTER_FLAG(CTA_TUPLE_ZONE)) && tb[CTA_TUPLE_ZONE]) {
deedb590
DB		 1487 if (!zone)
1488 return -EINVAL;
1489
1490 err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
1491 type, zone);
1492 if (err < 0)
1493 return err;
1494 }
1495
c1d10adb
PNA		 1496 /* orig and expect tuples get DIR_ORIGINAL */
1497 if (type == CTA_TUPLE_REPLY)
1498 tuple->dst.dir = IP_CT_DIR_REPLY;
1499 else
1500 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
1501
c1d10adb
PNA		 1502 return 0;
1503}
1504
cb8aa9a3
RB		 1505static int
1506ctnetlink_parse_tuple(const struct nlattr * const cda[],
1507 struct nf_conntrack_tuple *tuple, u32 type,
1508 u_int8_t l3num, struct nf_conntrack_zone *zone)
1509{
1510 return ctnetlink_parse_tuple_filter(cda, tuple, type, l3num, zone,
1511 CTA_FILTER_FLAG(ALL));
1512}
1513
d0b0268f 1514static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 1515 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
1516 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 1517};
1518
4054ff45
PNA		 1519static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
1520 struct nlattr **helpinfo)
c1d10adb 1521{
130ffbc2 1522 int err;
df6fb868 1523 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 1524
8cb08174
JB		 1525 err = nla_parse_nested_deprecated(tb, CTA_HELP_MAX, attr,
1526 help_nla_policy, NULL);
130ffbc2
DB		 1527 if (err < 0)
1528 return err;
c1d10adb 1529
df6fb868 1530 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 1531 return -EINVAL;
1532
df6fb868 1533 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 1534
ae243bee
PNA		 1535 if (tb[CTA_HELP_INFO])
1536 *helpinfo = tb[CTA_HELP_INFO];
1537
c1d10adb
PNA		 1538 return 0;
1539}
1540
f73e924c 1541static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 1542 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
1543 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 1544 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 1545 [CTA_PROTOINFO] = { .type = NLA_NESTED },
1546 [CTA_HELP] = { .type = NLA_NESTED },
1547 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 1548 [CTA_TIMEOUT] = { .type = NLA_U32 },
1549 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 1550 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 1551 [CTA_NAT_DST] = { .type = NLA_NESTED },
1552 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 1553 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
1554 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 1555 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 1556 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9 1557 [CTA_LABELS] = { .type = NLA_BINARY,
d2bf2f34 1558 .len = NF_CT_LABELS_MAX_SIZE },
9b21f6a9 1559 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
d2bf2f34 1560 .len = NF_CT_LABELS_MAX_SIZE },
cb8aa9a3 1561 [CTA_FILTER] = { .type = NLA_NESTED },
9344988d 1562 [CTA_STATUS_MASK] = { .type = NLA_U32 },
c1d10adb
PNA		 1563};
1564
90964016
PNA		 1565static int ctnetlink_flush_iterate(struct nf_conn *ct, void *data)
1566{
90964016
PNA		 1567 return ctnetlink_filter_match(ct, data);
1568}
1569
866476f3
KE		 1570static int ctnetlink_flush_conntrack(struct net *net,
1571 const struct nlattr * const cda[],
59c08c69 1572 u32 portid, int report, u8 family)
866476f3
KE		 1573{
1574 struct ctnetlink_filter *filter = NULL;
8169ff58
PNA		 1575 struct nf_ct_iter_data iter = {
1576 .net = net,
1577 .portid = portid,
1578 .report = report,
1579 };
866476f3 1580
cb8aa9a3
RB		 1581 if (ctnetlink_needs_filter(family, cda)) {
1582 if (cda[CTA_FILTER])
1583 return -EOPNOTSUPP;
1584
59c08c69 1585 filter = ctnetlink_alloc_filter(cda, family);
866476f3
KE		 1586 if (IS_ERR(filter))
1587 return PTR_ERR(filter);
8169ff58
PNA		 1588
1589 iter.data = filter;
866476f3
KE		 1590 }
1591
8169ff58 1592 nf_ct_iterate_cleanup_net(ctnetlink_flush_iterate, &iter);
866476f3
KE		 1593 kfree(filter);
1594
1595 return 0;
1596}
1597
a6555365
PNA		 1598static int ctnetlink_del_conntrack(struct sk_buff *skb,
1599 const struct nfnl_info *info,
1600 const struct nlattr * const cda[])
c1d10adb 1601{
ef4b65e5 1602 u8 family = info->nfmsg->nfgen_family;
c1d10adb
PNA		 1603 struct nf_conntrack_tuple_hash *h;
1604 struct nf_conntrack_tuple tuple;
308ac914 1605 struct nf_conntrack_zone zone;
a6555365 1606 struct nf_conn *ct;
ef00f89f
PM		 1607 int err;
1608
1609 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1610 if (err < 0)
1611 return err;
c1d10adb 1612
df6fb868 1613 if (cda[CTA_TUPLE_ORIG])
deedb590 1614 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
ef4b65e5 1615 family, &zone);
df6fb868 1616 else if (cda[CTA_TUPLE_REPLY])
deedb590 1617 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
ef4b65e5 1618 family, &zone);
c1d10adb 1619 else {
ef4b65e5 1620 u_int8_t u3 = info->nfmsg->version ? family : AF_UNSPEC;
e7600865 1621
a6555365 1622 return ctnetlink_flush_conntrack(info->net, cda,
866476f3 1623 NETLINK_CB(skb).portid,
a6555365 1624 nlmsg_report(info->nlh), u3);
c1d10adb
PNA		 1625 }
1626
1627 if (err < 0)
1628 return err;
1629
a6555365 1630 h = nf_conntrack_find_get(info->net, &zone, &tuple);
9ea8cfd6 1631 if (!h)
c1d10adb 1632 return -ENOENT;
c1d10adb
PNA		 1633
1634 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1635
df6fb868 1636 if (cda[CTA_ID]) {
3c791076
FW		 1637 __be32 id = nla_get_be32(cda[CTA_ID]);
1638
1639 if (id != (__force __be32)nf_ct_get_id(ct)) {
c1d10adb
PNA		 1640 nf_ct_put(ct);
1641 return -ENOENT;
1642 }
601e68e1 1643 }
c1d10adb 1644
a6555365 1645 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(info->nlh));
c1d10adb 1646 nf_ct_put(ct);
c1d10adb
PNA		 1647
1648 return 0;
1649}
1650
a6555365
PNA		 1651static int ctnetlink_get_conntrack(struct sk_buff *skb,
1652 const struct nfnl_info *info,
1653 const struct nlattr * const cda[])
c1d10adb 1654{
ef4b65e5 1655 u_int8_t u3 = info->nfmsg->nfgen_family;
c1d10adb
PNA		 1656 struct nf_conntrack_tuple_hash *h;
1657 struct nf_conntrack_tuple tuple;
308ac914 1658 struct nf_conntrack_zone zone;
a6555365
PNA		 1659 struct sk_buff *skb2;
1660 struct nf_conn *ct;
ef00f89f 1661 int err;
c1d10adb 1662
a6555365 1663 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
80d326fa 1664 struct netlink_dump_control c = {
3e673b23 1665 .start = ctnetlink_start,
80d326fa
PNA		 1666 .dump = ctnetlink_dump_table,
1667 .done = ctnetlink_done,
3e673b23 1668 .data = (void *)cda,
80d326fa 1669 };
866476f3 1670
a6555365 1671 return netlink_dump_start(info->sk, skb, info->nlh, &c);
80d326fa 1672 }
c1d10adb 1673
ef00f89f
PM		 1674 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1675 if (err < 0)
1676 return err;
1677
df6fb868 1678 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1679 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1680 u3, &zone);
df6fb868 1681 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1682 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1683 u3, &zone);
c1d10adb
PNA		 1684 else
1685 return -EINVAL;
1686
1687 if (err < 0)
1688 return err;
1689
a6555365 1690 h = nf_conntrack_find_get(info->net, &zone, &tuple);
9ea8cfd6 1691 if (!h)
c1d10adb 1692 return -ENOENT;
9ea8cfd6 1693
c1d10adb
PNA		 1694 ct = nf_ct_tuplehash_to_ctrack(h);
1695
96bcf938 1696 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
e0241ae6 1697 if (!skb2) {
c1d10adb
PNA		 1698 nf_ct_put(ct);
1699 return -ENOMEM;
1700 }
c1d10adb 1701
a6555365
PNA		 1702 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid,
1703 info->nlh->nlmsg_seq,
1704 NFNL_MSG_TYPE(info->nlh->nlmsg_type), ct,
1705 true, 0);
c1d10adb 1706 nf_ct_put(ct);
e0241ae6
PNA		 1707 if (err <= 0) {
1708 kfree_skb(skb2);
1709 return -ENOMEM;
1710 }
c1d10adb 1711
e0241ae6 1712 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
c1d10adb
PNA		 1713}
1714
d871befe
PNA		 1715static int ctnetlink_done_list(struct netlink_callback *cb)
1716{
5948ed29
FW		 1717 struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
1718
1719 if (ctx->last)
1720 nf_ct_put(ctx->last);
1721
d871befe
PNA		 1722 return 0;
1723}
1724
58a94a62 1725#ifdef CONFIG_NF_CONNTRACK_EVENTS
49001a2e
FW		 1726static int ctnetlink_dump_one_entry(struct sk_buff *skb,
1727 struct netlink_callback *cb,
1728 struct nf_conn *ct,
1729 bool dying)
1730{
1731 struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
1732 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1733 u8 l3proto = nfmsg->nfgen_family;
1734 int res;
1735
1736 if (l3proto && nf_ct_l3num(ct) != l3proto)
1737 return 0;
1738
1739 if (ctx->last) {
1740 if (ct != ctx->last)
1741 return 0;
1742
1743 ctx->last = NULL;
1744 }
1745
1746 /* We can't dump extension info for the unconfirmed
1747 * list because unconfirmed conntracks can have
1748 * ct->ext reallocated (and thus freed).
1749 *
1750 * In the dying list case ct->ext can't be free'd
1751 * until after we drop pcpu->lock.
1752 */
1753 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1754 cb->nlh->nlmsg_seq,
1755 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1756 ct, dying, 0);
1757 if (res < 0) {
1758 if (!refcount_inc_not_zero(&ct->ct_general.use))
1759 return 0;
1760
1761 ctx->last = ct;
1762 }
1763
1764 return res;
1765}
58a94a62 1766#endif
49001a2e 1767
d871befe 1768static int
1397af5b 1769ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
d871befe 1770{
8a75a2c1 1771 return 0;
d871befe
PNA		 1772}
1773
1774static int
1775ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1776{
0d3cc504
FW		 1777 struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
1778 struct nf_conn *last = ctx->last;
1779#ifdef CONFIG_NF_CONNTRACK_EVENTS
1780 const struct net *net = sock_net(skb->sk);
1781 struct nf_conntrack_net_ecache *ecache_net;
1782 struct nf_conntrack_tuple_hash *h;
1783 struct hlist_nulls_node *n;
1784#endif
1785
1397af5b
FW		 1786 if (ctx->done)
1787 return 0;
0d3cc504
FW		 1788
1789 ctx->last = NULL;
1790
1791#ifdef CONFIG_NF_CONNTRACK_EVENTS
1792 ecache_net = nf_conn_pernet_ecache(net);
1793 spin_lock_bh(&ecache_net->dying_lock);
1794
1795 hlist_nulls_for_each_entry(h, n, &ecache_net->dying_list, hnnode) {
1796 struct nf_conn *ct;
1797 int res;
1798
1799 ct = nf_ct_tuplehash_to_ctrack(h);
1800 if (last && last != ct)
1801 continue;
1802
1803 res = ctnetlink_dump_one_entry(skb, cb, ct, true);
1804 if (res < 0) {
1805 spin_unlock_bh(&ecache_net->dying_lock);
1806 nf_ct_put(last);
1807 return skb->len;
1808 }
1809
1810 nf_ct_put(last);
1811 last = NULL;
1812 }
1813
1814 spin_unlock_bh(&ecache_net->dying_lock);
1815#endif
1397af5b 1816 ctx->done = true;
0d3cc504 1817 nf_ct_put(last);
0d3cc504 1818
1397af5b 1819 return skb->len;
d871befe
PNA		 1820}
1821
a6555365
PNA		 1822static int ctnetlink_get_ct_dying(struct sk_buff *skb,
1823 const struct nfnl_info *info,
1824 const struct nlattr * const cda[])
d871befe 1825{
a6555365 1826 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
d871befe
PNA		 1827 struct netlink_dump_control c = {
1828 .dump = ctnetlink_dump_dying,
1829 .done = ctnetlink_done_list,
1830 };
a6555365 1831 return netlink_dump_start(info->sk, skb, info->nlh, &c);
d871befe
PNA		 1832 }
1833
1834 return -EOPNOTSUPP;
1835}
1836
a6555365
PNA		 1837static int ctnetlink_get_ct_unconfirmed(struct sk_buff *skb,
1838 const struct nfnl_info *info,
1839 const struct nlattr * const cda[])
d871befe 1840{
a6555365 1841 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
d871befe
PNA		 1842 struct netlink_dump_control c = {
1843 .dump = ctnetlink_dump_unconfirmed,
1844 .done = ctnetlink_done_list,
1845 };
a6555365 1846 return netlink_dump_start(info->sk, skb, info->nlh, &c);
d871befe
PNA		 1847 }
1848
1849 return -EOPNOTSUPP;
1850}
1851
4806e975 1852#if IS_ENABLED(CONFIG_NF_NAT)
e6a7d3c0
PNA		 1853static int
1854ctnetlink_parse_nat_setup(struct nf_conn *ct,
1855 enum nf_nat_manip_type manip,
39938324 1856 const struct nlattr *attr)
19f8f717 1857 __must_hold(RCU)
e6a7d3c0 1858{
285c8a7a 1859 const struct nf_nat_hook *nat_hook;
c7232c99 1860 int err;
e6a7d3c0 1861
2c205dd3
PNA		 1862 nat_hook = rcu_dereference(nf_nat_hook);
1863 if (!nat_hook) {
95a5afca 1864#ifdef CONFIG_MODULES
e6a7d3c0 1865 rcu_read_unlock();
c14b78e7 1866 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1867 if (request_module("nf-nat") < 0) {
c14b78e7 1868 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1869 rcu_read_lock();
1870 return -EOPNOTSUPP;
1871 }
c14b78e7 1872 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0 1873 rcu_read_lock();
c05a45c0
FW		 1874 nat_hook = rcu_dereference(nf_nat_hook);
1875 if (nat_hook)
e6a7d3c0
PNA		 1876 return -EAGAIN;
1877#endif
1878 return -EOPNOTSUPP;
1879 }
1880
2c205dd3 1881 err = nat_hook->parse_nat_setup(ct, manip, attr);
c7232c99
PM		 1882 if (err == -EAGAIN) {
1883#ifdef CONFIG_MODULES
1884 rcu_read_unlock();
c14b78e7 1885 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1886 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1887 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1888 rcu_read_lock();
1889 return -EOPNOTSUPP;
1890 }
c14b78e7 1891 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1892 rcu_read_lock();
1893#else
1894 err = -EOPNOTSUPP;
1895#endif
1896 }
1897 return err;
e6a7d3c0 1898}
67671841 1899#endif
e6a7d3c0 1900
bb5cf80e 1901static int
39938324 1902ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1903{
ef69aa3a 1904 return nf_ct_change_status_common(ct, ntohl(nla_get_be32(cda[CTA_STATUS])));
c1d10adb
PNA		 1905}
1906
e6a7d3c0 1907static int
0eba801b 1908ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0 1909{
4806e975 1910#if IS_ENABLED(CONFIG_NF_NAT)
e6a7d3c0
PNA		 1911 int ret;
1912
fe337ac2
FW		 1913 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1914 return 0;
1915
0eba801b
PNA		 1916 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1917 cda[CTA_NAT_DST]);
1918 if (ret < 0)
1919 return ret;
1920
c47d36b3
AS		 1921 return ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1922 cda[CTA_NAT_SRC]);
e6a7d3c0 1923#else
0eba801b
PNA		 1924 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1925 return 0;
e6a7d3c0
PNA		 1926 return -EOPNOTSUPP;
1927#endif
1928}
c1d10adb 1929
4054ff45
PNA		 1930static int ctnetlink_change_helper(struct nf_conn *ct,
1931 const struct nlattr * const cda[])
c1d10adb
PNA		 1932{
1933 struct nf_conntrack_helper *helper;
dc808fe2 1934 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1935 char *helpname = NULL;
ae243bee 1936 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1937 int err;
1938
ae243bee 1939 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1940 if (err < 0)
1941 return err;
1942
f95d7a46
KC		 1943 /* don't change helper of sibling connections */
1944 if (ct->master) {
1945 /* If we try to change the helper to the same thing twice,
1946 * treat the second attempt as a no-op instead of returning
1947 * an error.
1948 */
3173d5b8
LZ		 1949 err = -EBUSY;
1950 if (help) {
1951 rcu_read_lock();
1952 helper = rcu_dereference(help->helper);
1953 if (helper && !strcmp(helper->name, helpname))
1954 err = 0;
1955 rcu_read_unlock();
1956 }
1957
1958 return err;
f95d7a46
KC		 1959 }
1960
df293bbb
YK		 1961 if (!strcmp(helpname, "")) {
1962 if (help && help->helper) {
c1d10adb
PNA		 1963 /* we had a helper before ... */
1964 nf_ct_remove_expectations(ct);
a9b3cd7f 1965 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1966 }
df293bbb
YK		 1967
1968 return 0;
c1d10adb 1969 }
601e68e1 1970
88be4c09 1971 rcu_read_lock();
794e6871
PM		 1972 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1973 nf_ct_protonum(ct));
226c0c0e 1974 if (helper == NULL) {
88be4c09 1975 rcu_read_unlock();
0adf9d67 1976 return -EOPNOTSUPP;
226c0c0e 1977 }
df293bbb 1978
ceceae1b 1979 if (help) {
e14575fa 1980 if (rcu_access_pointer(help->helper) == helper) {
ae243bee 1981 /* update private helper data if allowed. */
7be54ca4 1982 if (helper->from_nlattr)
ae243bee 1983 helper->from_nlattr(helpinfo, ct);
88be4c09 1984 err = 0;
fd7462de 1985 } else
88be4c09
LZ		 1986 err = -EBUSY;
1987 } else {
1988 /* we cannot set a helper for an existing conntrack */
1989 err = -EOPNOTSUPP;
ceceae1b 1990 }
df293bbb 1991
88be4c09
LZ		 1992 rcu_read_unlock();
1993 return err;
c1d10adb
PNA		 1994}
1995
4054ff45
PNA		 1996static int ctnetlink_change_timeout(struct nf_conn *ct,
1997 const struct nlattr * const cda[])
c1d10adb 1998{
0b389236 1999 return __nf_ct_change_timeout(ct, (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ);
c1d10adb
PNA		 2000}
2001
58fc419b
AJ		 2002#if defined(CONFIG_NF_CONNTRACK_MARK)
2003static void ctnetlink_change_mark(struct nf_conn *ct,
2004 const struct nlattr * const cda[])
2005{
2006 u32 mark, newmark, mask = 0;
2007
2008 if (cda[CTA_MARK_MASK])
2009 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2010
2011 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
52d1aa8b
DX		 2012 newmark = (READ_ONCE(ct->mark) & mask) ^ mark;
2013 if (newmark != READ_ONCE(ct->mark))
2014 WRITE_ONCE(ct->mark, newmark);
58fc419b
AJ		 2015}
2016#endif
2017
d0b0268f
PM		 2018static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
2019 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
2020 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
2021 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
2022};
2023
4054ff45
PNA		 2024static int ctnetlink_change_protoinfo(struct nf_conn *ct,
2025 const struct nlattr * const cda[])
c1d10adb 2026{
39938324 2027 const struct nlattr *attr = cda[CTA_PROTOINFO];
b3480fe0 2028 const struct nf_conntrack_l4proto *l4proto;
39938324 2029 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
c1d10adb
PNA		 2030 int err = 0;
2031
8cb08174
JB		 2032 err = nla_parse_nested_deprecated(tb, CTA_PROTOINFO_MAX, attr,
2033 protoinfo_policy, NULL);
130ffbc2
DB		 2034 if (err < 0)
2035 return err;
c1d10adb 2036
4a60dc74 2037 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
fdf70832
PM		 2038 if (l4proto->from_nlattr)
2039 err = l4proto->from_nlattr(tb, ct);
c1d10adb
PNA		 2040
2041 return err;
2042}
2043
41d73ec0
PM		 2044static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = {
2045 [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 },
2046 [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 },
2047 [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 },
d0b0268f
PM		 2048};
2049
4054ff45
PNA		 2050static int change_seq_adj(struct nf_ct_seqadj *seq,
2051 const struct nlattr * const attr)
13eae15a 2052{
130ffbc2 2053 int err;
41d73ec0 2054 struct nlattr *cda[CTA_SEQADJ_MAX+1];
13eae15a 2055
8cb08174
JB		 2056 err = nla_parse_nested_deprecated(cda, CTA_SEQADJ_MAX, attr,
2057 seqadj_policy, NULL);
130ffbc2
DB		 2058 if (err < 0)
2059 return err;
13eae15a 2060
41d73ec0 2061 if (!cda[CTA_SEQADJ_CORRECTION_POS])
13eae15a
PNA		 2062 return -EINVAL;
2063
41d73ec0
PM		 2064 seq->correction_pos =
2065 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
13eae15a 2066
41d73ec0 2067 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
13eae15a
PNA		 2068 return -EINVAL;
2069
41d73ec0
PM		 2070 seq->offset_before =
2071 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
13eae15a 2072
41d73ec0 2073 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
13eae15a
PNA		 2074 return -EINVAL;
2075
41d73ec0
PM		 2076 seq->offset_after =
2077 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
13eae15a
PNA		 2078
2079 return 0;
2080}
2081
2082static int
41d73ec0
PM		 2083ctnetlink_change_seq_adj(struct nf_conn *ct,
2084 const struct nlattr * const cda[])
13eae15a 2085{
41d73ec0 2086 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
13eae15a 2087 int ret = 0;
13eae15a 2088
41d73ec0 2089 if (!seqadj)
13eae15a
PNA		 2090 return 0;
2091
64f3967c 2092 spin_lock_bh(&ct->lock);
41d73ec0
PM		 2093 if (cda[CTA_SEQ_ADJ_ORIG]) {
2094 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
2095 cda[CTA_SEQ_ADJ_ORIG]);
13eae15a 2096 if (ret < 0)
64f3967c 2097 goto err;
13eae15a 2098
53b56da8 2099 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 2100 }
2101
41d73ec0
PM		 2102 if (cda[CTA_SEQ_ADJ_REPLY]) {
2103 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
2104 cda[CTA_SEQ_ADJ_REPLY]);
13eae15a 2105 if (ret < 0)
64f3967c 2106 goto err;
13eae15a 2107
53b56da8 2108 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 2109 }
2110
64f3967c 2111 spin_unlock_bh(&ct->lock);
13eae15a 2112 return 0;
64f3967c
LZ		 2113err:
2114 spin_unlock_bh(&ct->lock);
2115 return ret;
13eae15a 2116}
13eae15a 2117
20710b3b
PNA		 2118static const struct nla_policy synproxy_policy[CTA_SYNPROXY_MAX + 1] = {
2119 [CTA_SYNPROXY_ISN] = { .type = NLA_U32 },
2120 [CTA_SYNPROXY_ITS] = { .type = NLA_U32 },
2121 [CTA_SYNPROXY_TSOFF] = { .type = NLA_U32 },
2122};
2123
2124static int ctnetlink_change_synproxy(struct nf_conn *ct,
2125 const struct nlattr * const cda[])
2126{
2127 struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
2128 struct nlattr *tb[CTA_SYNPROXY_MAX + 1];
2129 int err;
2130
2131 if (!synproxy)
2132 return 0;
2133
8cb08174
JB		 2134 err = nla_parse_nested_deprecated(tb, CTA_SYNPROXY_MAX,
2135 cda[CTA_SYNPROXY], synproxy_policy,
2136 NULL);
20710b3b
PNA		 2137 if (err < 0)
2138 return err;
2139
2140 if (!tb[CTA_SYNPROXY_ISN] ||
2141 !tb[CTA_SYNPROXY_ITS] ||
2142 !tb[CTA_SYNPROXY_TSOFF])
2143 return -EINVAL;
2144
2145 synproxy->isn = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ISN]));
2146 synproxy->its = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ITS]));
2147 synproxy->tsoff = ntohl(nla_get_be32(tb[CTA_SYNPROXY_TSOFF]));
2148
2149 return 0;
2150}
2151
9b21f6a9
FW		 2152static int
2153ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
2154{
2155#ifdef CONFIG_NF_CONNTRACK_LABELS
2156 size_t len = nla_len(cda[CTA_LABELS]);
2157 const void *mask = cda[CTA_LABELS_MASK];
2158
2159 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
2160 return -EINVAL;
2161
2162 if (mask) {
2163 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
2164 nla_len(cda[CTA_LABELS_MASK]) != len)
2165 return -EINVAL;
2166 mask = nla_data(cda[CTA_LABELS_MASK]);
2167 }
2168
2169 len /= sizeof(u32);
2170
2171 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
2172#else
2173 return -EOPNOTSUPP;
2174#endif
2175}
2176
c1d10adb 2177static int
39938324
PM		 2178ctnetlink_change_conntrack(struct nf_conn *ct,
2179 const struct nlattr * const cda[])
c1d10adb
PNA		 2180{
2181 int err;
2182
e098360f
PNA		 2183 /* only allow NAT changes and master assignation for new conntracks */
2184 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
2185 return -EOPNOTSUPP;
2186
df6fb868 2187 if (cda[CTA_HELP]) {
c1d10adb
PNA		 2188 err = ctnetlink_change_helper(ct, cda);
2189 if (err < 0)
2190 return err;
2191 }
2192
df6fb868 2193 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 2194 err = ctnetlink_change_timeout(ct, cda);
2195 if (err < 0)
2196 return err;
2197 }
2198
df6fb868 2199 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 2200 err = ctnetlink_change_status(ct, cda);
2201 if (err < 0)
2202 return err;
2203 }
2204
df6fb868 2205 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 2206 err = ctnetlink_change_protoinfo(ct, cda);
2207 if (err < 0)
2208 return err;
2209 }
2210
bcd1e830 2211#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 2212 if (cda[CTA_MARK])
58fc419b 2213 ctnetlink_change_mark(ct, cda);
c1d10adb
PNA		 2214#endif
2215
41d73ec0
PM		 2216 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
2217 err = ctnetlink_change_seq_adj(ct, cda);
13eae15a
PNA		 2218 if (err < 0)
2219 return err;
2220 }
41d73ec0 2221
20710b3b
PNA		 2222 if (cda[CTA_SYNPROXY]) {
2223 err = ctnetlink_change_synproxy(ct, cda);
2224 if (err < 0)
2225 return err;
2226 }
2227
9b21f6a9
FW		 2228 if (cda[CTA_LABELS]) {
2229 err = ctnetlink_attach_labels(ct, cda);
2230 if (err < 0)
2231 return err;
2232 }
13eae15a 2233
c1d10adb
PNA		 2234 return 0;
2235}
2236
f0a3c086 2237static struct nf_conn *
308ac914
DB		 2238ctnetlink_create_conntrack(struct net *net,
2239 const struct nf_conntrack_zone *zone,
9592a5c0 2240 const struct nlattr * const cda[],
c1d10adb 2241 struct nf_conntrack_tuple *otuple,
5faa1f4c 2242 struct nf_conntrack_tuple *rtuple,
7ec47496 2243 u8 u3)
c1d10adb
PNA		 2244{
2245 struct nf_conn *ct;
2246 int err = -EINVAL;
ceceae1b 2247 struct nf_conntrack_helper *helper;
315c34da 2248 struct nf_conn_tstamp *tstamp;
8b1836c4 2249 u64 timeout;
c1d10adb 2250
ef00f89f 2251 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 2252 if (IS_ERR(ct))
f0a3c086 2253 return ERR_PTR(-ENOMEM);
c1d10adb 2254
df6fb868 2255 if (!cda[CTA_TIMEOUT])
0f5b3e85 2256 goto err1;
c1d10adb 2257
1575e7ea 2258 rcu_read_lock();
226c0c0e 2259 if (cda[CTA_HELP]) {
29fe1b48 2260 char *helpname = NULL;
ae243bee
PNA		 2261 struct nlattr *helpinfo = NULL;
2262
2263 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 2264 if (err < 0)
2265 goto err2;
226c0c0e 2266
794e6871
PM		 2267 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2268 nf_ct_protonum(ct));
226c0c0e
PNA		 2269 if (helper == NULL) {
2270 rcu_read_unlock();
2271#ifdef CONFIG_MODULES
2272 if (request_module("nfct-helper-%s", helpname) < 0) {
2273 err = -EOPNOTSUPP;
0f5b3e85 2274 goto err1;
226c0c0e
PNA		 2275 }
2276
2277 rcu_read_lock();
794e6871
PM		 2278 helper = __nf_conntrack_helper_find(helpname,
2279 nf_ct_l3num(ct),
2280 nf_ct_protonum(ct));
226c0c0e 2281 if (helper) {
226c0c0e 2282 err = -EAGAIN;
0f5b3e85 2283 goto err2;
226c0c0e
PNA		 2284 }
2285 rcu_read_unlock();
2286#endif
2287 err = -EOPNOTSUPP;
0f5b3e85 2288 goto err1;
226c0c0e
PNA		 2289 } else {
2290 struct nf_conn_help *help;
2291
440534d3 2292 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
226c0c0e 2293 if (help == NULL) {
226c0c0e 2294 err = -ENOMEM;
0f5b3e85 2295 goto err2;
226c0c0e 2296 }
ae243bee 2297 /* set private helper data if allowed. */
7be54ca4 2298 if (helper->from_nlattr)
ae243bee 2299 helper->from_nlattr(helpinfo, ct);
226c0c0e 2300
d1ca60ef
FW		 2301 /* disable helper auto-assignment for this entry */
2302 ct->status |= IPS_HELPER;
a9b3cd7f 2303 RCU_INIT_POINTER(help->helper, helper);
226c0c0e 2304 }
1575e7ea
PNA		 2305 }
2306
0eba801b
PNA		 2307 err = ctnetlink_setup_nat(ct, cda);
2308 if (err < 0)
2309 goto err2;
e6a7d3c0 2310
a88e22ad 2311 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 2312 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 2313 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017 2314 nf_ct_labels_ext_add(ct);
87e94dbc
EL		 2315 nfct_seqadj_ext_add(ct);
2316 nfct_synproxy_ext_add(ct);
c539f017 2317
2cdaa3ee
PNA		 2318 /* we must add conntrack extensions before confirmation. */
2319 ct->status |= IPS_CONFIRMED;
2320
73db1b8f
TBS		 2321 timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;
2322 __nf_ct_set_timeout(ct, timeout);
2323
a88e22ad
PNA		 2324 if (cda[CTA_STATUS]) {
2325 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 2326 if (err < 0)
2327 goto err2;
bbb3357d 2328 }
c1d10adb 2329
41d73ec0
PM		 2330 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
2331 err = ctnetlink_change_seq_adj(ct, cda);
0f5b3e85
PM		 2332 if (err < 0)
2333 goto err2;
c969aa7d 2334 }
c969aa7d 2335
e5fc9e7a 2336 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 2337 if (cda[CTA_PROTOINFO]) {
c1d10adb 2338 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 2339 if (err < 0)
2340 goto err2;
c1d10adb
PNA		 2341 }
2342
20710b3b
PNA		 2343 if (cda[CTA_SYNPROXY]) {
2344 err = ctnetlink_change_synproxy(ct, cda);
2345 if (err < 0)
2346 goto err2;
2347 }
2348
bcd1e830 2349#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 2350 if (cda[CTA_MARK])
58fc419b 2351 ctnetlink_change_mark(ct, cda);
c1d10adb
PNA		 2352#endif
2353
5faa1f4c 2354 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 2355 if (cda[CTA_TUPLE_MASTER]) {
2356 struct nf_conntrack_tuple master;
2357 struct nf_conntrack_tuple_hash *master_h;
2358 struct nf_conn *master_ct;
2359
deedb590
DB		 2360 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
2361 u3, NULL);
7ec47496 2362 if (err < 0)
0f5b3e85 2363 goto err2;
7ec47496 2364
ef00f89f 2365 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 2366 if (master_h == NULL) {
2367 err = -ENOENT;
0f5b3e85 2368 goto err2;
7ec47496
PNA		 2369 }
2370 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 2371 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 2372 ct->master = master_ct;
f2a89004 2373 }
315c34da
PNA		 2374 tstamp = nf_conn_tstamp_find(ct);
2375 if (tstamp)
d2de875c 2376 tstamp->start = ktime_get_real_ns();
5faa1f4c 2377
7d367e06
JK		 2378 err = nf_conntrack_hash_check_insert(ct);
2379 if (err < 0)
ac489398 2380 goto err3;
7d367e06 2381
58a3c9bb 2382 rcu_read_unlock();
dafc741c 2383
f0a3c086 2384 return ct;
c1d10adb 2385
ac489398
HH		 2386err3:
2387 if (ct->master)
2388 nf_ct_put(ct->master);
0f5b3e85
PM		 2389err2:
2390 rcu_read_unlock();
2391err1:
c1d10adb 2392 nf_conntrack_free(ct);
f0a3c086 2393 return ERR_PTR(err);
c1d10adb
PNA		 2394}
2395
a6555365
PNA		 2396static int ctnetlink_new_conntrack(struct sk_buff *skb,
2397 const struct nfnl_info *info,
2398 const struct nlattr * const cda[])
c1d10adb
PNA		 2399{
2400 struct nf_conntrack_tuple otuple, rtuple;
2401 struct nf_conntrack_tuple_hash *h = NULL;
ef4b65e5 2402 u_int8_t u3 = info->nfmsg->nfgen_family;
308ac914 2403 struct nf_conntrack_zone zone;
a6555365 2404 struct nf_conn *ct;
ef00f89f
PM		 2405 int err;
2406
2407 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
2408 if (err < 0)
2409 return err;
c1d10adb 2410
df6fb868 2411 if (cda[CTA_TUPLE_ORIG]) {
deedb590
DB		 2412 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
2413 u3, &zone);
c1d10adb
PNA		 2414 if (err < 0)
2415 return err;
2416 }
2417
df6fb868 2418 if (cda[CTA_TUPLE_REPLY]) {
deedb590
DB		 2419 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
2420 u3, &zone);
c1d10adb
PNA		 2421 if (err < 0)
2422 return err;
2423 }
2424
df6fb868 2425 if (cda[CTA_TUPLE_ORIG])
a6555365 2426 h = nf_conntrack_find_get(info->net, &zone, &otuple);
df6fb868 2427 else if (cda[CTA_TUPLE_REPLY])
a6555365 2428 h = nf_conntrack_find_get(info->net, &zone, &rtuple);
c1d10adb
PNA		 2429
2430 if (h == NULL) {
c1d10adb 2431 err = -ENOENT;
a6555365 2432 if (info->nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 2433 enum ip_conntrack_events events;
5faa1f4c 2434
442fad94
FW		 2435 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
2436 return -EINVAL;
aa0c2c68
LZ		 2437 if (otuple.dst.protonum != rtuple.dst.protonum)
2438 return -EINVAL;
442fad94 2439
a6555365
PNA		 2440 ct = ctnetlink_create_conntrack(info->net, &zone, cda,
2441 &otuple, &rtuple, u3);
7d367e06
JK		 2442 if (IS_ERR(ct))
2443 return PTR_ERR(ct);
2444
f0a3c086 2445 err = 0;
fecc1133 2446 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
97aae0df 2447 events = 1 << IPCT_RELATED;
fecc1133 2448 else
97aae0df 2449 events = 1 << IPCT_NEW;
fecc1133 2450
9b21f6a9
FW		 2451 if (cda[CTA_LABELS] &&
2452 ctnetlink_attach_labels(ct, cda) == 0)
2453 events |= (1 << IPCT_LABEL);
2454
858b3133
PM		 2455 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
2456 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 2457 (1 << IPCT_HELPER) |
2458 (1 << IPCT_PROTOINFO) |
41d73ec0 2459 (1 << IPCT_SEQADJ) |
20710b3b
PNA		 2460 (1 << IPCT_MARK) |
2461 (1 << IPCT_SYNPROXY) |
2462 events,
15e47304 2463 ct, NETLINK_CB(skb).portid,
a6555365 2464 nlmsg_report(info->nlh));
f0a3c086 2465 nf_ct_put(ct);
7d367e06 2466 }
5faa1f4c 2467
c1d10adb
PNA		 2468 return err;
2469 }
2470 /* implicit 'else' */
2471
c1d10adb 2472 err = -EEXIST;
7d367e06 2473 ct = nf_ct_tuplehash_to_ctrack(h);
a6555365 2474 if (!(info->nlh->nlmsg_flags & NLM_F_EXCL)) {
19abb7b0
PNA		 2475 err = ctnetlink_change_conntrack(ct, cda);
2476 if (err == 0) {
858b3133
PM		 2477 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
2478 (1 << IPCT_ASSURED) |
a0891aa6 2479 (1 << IPCT_HELPER) |
797a7d66 2480 (1 << IPCT_LABEL) |
a0891aa6 2481 (1 << IPCT_PROTOINFO) |
41d73ec0 2482 (1 << IPCT_SEQADJ) |
20710b3b
PNA		 2483 (1 << IPCT_MARK) |
2484 (1 << IPCT_SYNPROXY),
15e47304 2485 ct, NETLINK_CB(skb).portid,
a6555365 2486 nlmsg_report(info->nlh));
7d367e06 2487 }
ff4ca827 2488 }
c1d10adb 2489
7d367e06 2490 nf_ct_put(ct);
c1d10adb
PNA		 2491 return err;
2492}
2493
392025f8 2494static int
15e47304 2495ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 2496 __u16 cpu, const struct ip_conntrack_stat *st)
2497{
2498 struct nlmsghdr *nlh;
15e47304 2499 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 2500
dedb67c4
PNA		 2501 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
2502 IPCTNL_MSG_CT_GET_STATS_CPU);
19c28b13
PNA		 2503 nlh = nfnl_msg_put(skb, portid, seq, event, flags, AF_UNSPEC,
2504 NFNETLINK_V0, htons(cpu));
2505 if (!nlh)
392025f8
PNA		 2506 goto nlmsg_failure;
2507
8e8118f8 2508 if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
392025f8 2509 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
392025f8
PNA		 2510 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
2511 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
2512 htonl(st->insert_failed)) ||
2513 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
2514 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
2515 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
2516 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
bc924704
FW		 2517 htonl(st->search_restart)) ||
2518 nla_put_be32(skb, CTA_STATS_CLASH_RESOLVE,
d7e7747a
FW		 2519 htonl(st->clash_resolve)) ||
2520 nla_put_be32(skb, CTA_STATS_CHAIN_TOOLONG,
2521 htonl(st->chaintoolong)))
392025f8
PNA		 2522 goto nla_put_failure;
2523
2524 nlmsg_end(skb, nlh);
2525 return skb->len;
2526
2527nla_put_failure:
2528nlmsg_failure:
2529 nlmsg_cancel(skb, nlh);
2530 return -1;
2531}
2532
2533static int
2534ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2535{
2536 int cpu;
2537 struct net *net = sock_net(skb->sk);
2538
2539 if (cb->args[0] == nr_cpu_ids)
2540 return 0;
2541
2542 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2543 const struct ip_conntrack_stat *st;
2544
2545 if (!cpu_possible(cpu))
2546 continue;
2547
2548 st = per_cpu_ptr(net->ct.stat, cpu);
2549 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 2550 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2551 cb->nlh->nlmsg_seq,
2552 cpu, st) < 0)
2553 break;
2554 }
2555 cb->args[0] = cpu;
2556
2557 return skb->len;
2558}
2559
a6555365
PNA		 2560static int ctnetlink_stat_ct_cpu(struct sk_buff *skb,
2561 const struct nfnl_info *info,
2562 const struct nlattr * const cda[])
392025f8 2563{
a6555365 2564 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
392025f8
PNA		 2565 struct netlink_dump_control c = {
2566 .dump = ctnetlink_ct_stat_cpu_dump,
2567 };
a6555365 2568 return netlink_dump_start(info->sk, skb, info->nlh, &c);
392025f8
PNA		 2569 }
2570
2571 return 0;
2572}
2573
2574static int
15e47304 2575ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 2576 struct net *net)
2577{
15e47304 2578 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c53bd0e9
FW		 2579 unsigned int nr_conntracks;
2580 struct nlmsghdr *nlh;
392025f8 2581
dedb67c4 2582 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS);
19c28b13
PNA		 2583 nlh = nfnl_msg_put(skb, portid, seq, event, flags, AF_UNSPEC,
2584 NFNETLINK_V0, 0);
2585 if (!nlh)
392025f8
PNA		 2586 goto nlmsg_failure;
2587
c53bd0e9 2588 nr_conntracks = nf_conntrack_count(net);
392025f8
PNA		 2589 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
2590 goto nla_put_failure;
2591
538c5672
FF		 2592 if (nla_put_be32(skb, CTA_STATS_GLOBAL_MAX_ENTRIES, htonl(nf_conntrack_max)))
2593 goto nla_put_failure;
2594
392025f8
PNA		 2595 nlmsg_end(skb, nlh);
2596 return skb->len;
2597
2598nla_put_failure:
2599nlmsg_failure:
2600 nlmsg_cancel(skb, nlh);
2601 return -1;
2602}
2603
a6555365
PNA		 2604static int ctnetlink_stat_ct(struct sk_buff *skb, const struct nfnl_info *info,
2605 const struct nlattr * const cda[])
392025f8
PNA		 2606{
2607 struct sk_buff *skb2;
2608 int err;
2609
2610 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2611 if (skb2 == NULL)
2612 return -ENOMEM;
2613
15e47304 2614 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
a6555365
PNA		 2615 info->nlh->nlmsg_seq,
2616 NFNL_MSG_TYPE(info->nlh->nlmsg_type),
392025f8 2617 sock_net(skb->sk));
e0241ae6
PNA		 2618 if (err <= 0) {
2619 kfree_skb(skb2);
2620 return -ENOMEM;
2621 }
392025f8 2622
e0241ae6 2623 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
392025f8
PNA		 2624}
2625
bd077937
PNA		 2626static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2627 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2628 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2629 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2630 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2631 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2632 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2633 .len = NF_CT_HELPER_NAME_LEN - 1 },
2634 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2635 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2636 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2637 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2638 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2639};
2640
2641static struct nf_conntrack_expect *
2642ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2643 struct nf_conntrack_helper *helper,
2644 struct nf_conntrack_tuple *tuple,
2645 struct nf_conntrack_tuple *mask);
2646
83f3e94d 2647#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 2648static size_t
a4b4766c 2649ctnetlink_glue_build_size(const struct nf_conn *ct)
9cb01766
PNA		 2650{
2651 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2652 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2653 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2654 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2655 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2656 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2657 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2658 + nla_total_size(0) /* CTA_PROTOINFO */
2659 + nla_total_size(0) /* CTA_HELP */
2660 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2661 + ctnetlink_secctx_size(ct)
6c89dac5
PNA		 2662 + ctnetlink_acct_size(ct)
2663 + ctnetlink_timestamp_size(ct)
4806e975 2664#if IS_ENABLED(CONFIG_NF_NAT)
9cb01766
PNA		 2665 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2666 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2667#endif
2668#ifdef CONFIG_NF_CONNTRACK_MARK
2669 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 2670#endif
2671#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 2672 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
9cb01766
PNA		 2673#endif
2674 + ctnetlink_proto_size(ct)
2675 ;
2676}
2677
a4b4766c 2678static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
9cb01766 2679{
308ac914 2680 const struct nf_conntrack_zone *zone;
9cb01766
PNA		 2681 struct nlattr *nest_parms;
2682
deedb590
DB		 2683 zone = nf_ct_zone(ct);
2684
ae0be8de 2685 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
9cb01766
PNA		 2686 if (!nest_parms)
2687 goto nla_put_failure;
2688 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2689 goto nla_put_failure;
deedb590
DB		 2690 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2691 NF_CT_ZONE_DIR_ORIG) < 0)
2692 goto nla_put_failure;
9cb01766
PNA		 2693 nla_nest_end(skb, nest_parms);
2694
ae0be8de 2695 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
9cb01766
PNA		 2696 if (!nest_parms)
2697 goto nla_put_failure;
2698 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2699 goto nla_put_failure;
deedb590
DB		 2700 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2701 NF_CT_ZONE_DIR_REPL) < 0)
2702 goto nla_put_failure;
9cb01766
PNA		 2703 nla_nest_end(skb, nest_parms);
2704
deedb590
DB		 2705 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
2706 NF_CT_DEFAULT_ZONE_DIR) < 0)
308ac914 2707 goto nla_put_failure;
9cb01766
PNA		 2708
2709 if (ctnetlink_dump_id(skb, ct) < 0)
2710 goto nla_put_failure;
2711
2712 if (ctnetlink_dump_status(skb, ct) < 0)
2713 goto nla_put_failure;
2714
86d21fc7 2715 if (ctnetlink_dump_timeout(skb, ct, false) < 0)
9cb01766
PNA		 2716 goto nla_put_failure;
2717
86d21fc7 2718 if (ctnetlink_dump_protoinfo(skb, ct, false) < 0)
9cb01766
PNA		 2719 goto nla_put_failure;
2720
6c89dac5
PNA		 2721 if (ctnetlink_dump_acct(skb, ct, IPCTNL_MSG_CT_GET) < 0 ||
2722 ctnetlink_dump_timestamp(skb, ct) < 0)
2723 goto nla_put_failure;
2724
9cb01766
PNA		 2725 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2726 goto nla_put_failure;
2727
2728#ifdef CONFIG_NF_CONNTRACK_SECMARK
2729 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2730 goto nla_put_failure;
2731#endif
2732 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2733 goto nla_put_failure;
2734
2735 if ((ct->status & IPS_SEQ_ADJUST) &&
41d73ec0 2736 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
9cb01766
PNA		 2737 goto nla_put_failure;
2738
20710b3b
PNA		 2739 if (ctnetlink_dump_ct_synproxy(skb, ct) < 0)
2740 goto nla_put_failure;
2741
9cb01766 2742#ifdef CONFIG_NF_CONNTRACK_MARK
9f7dd42f 2743 if (ctnetlink_dump_mark(skb, ct, true) < 0)
9cb01766
PNA		 2744 goto nla_put_failure;
2745#endif
0ceabd83
FW		 2746 if (ctnetlink_dump_labels(skb, ct) < 0)
2747 goto nla_put_failure;
9cb01766
PNA		 2748 return 0;
2749
2750nla_put_failure:
9cb01766
PNA		 2751 return -ENOSPC;
2752}
2753
b7bd1809 2754static int
a4b4766c
KM		 2755ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
2756 enum ip_conntrack_info ctinfo,
2757 u_int16_t ct_attr, u_int16_t ct_info_attr)
b7bd1809
PNA		 2758{
2759 struct nlattr *nest_parms;
2760
ae0be8de 2761 nest_parms = nla_nest_start(skb, ct_attr);
b7bd1809
PNA		 2762 if (!nest_parms)
2763 goto nla_put_failure;
2764
a4b4766c 2765 if (__ctnetlink_glue_build(skb, ct) < 0)
b7bd1809
PNA		 2766 goto nla_put_failure;
2767
2768 nla_nest_end(skb, nest_parms);
2769
2770 if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
2771 goto nla_put_failure;
2772
2773 return 0;
2774
2775nla_put_failure:
2776 return -ENOSPC;
2777}
2778
a963d710
KC		 2779static int
2780ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[])
2781{
2782 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
2783 unsigned long d = ct->status ^ status;
2784
2785 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
2786 /* SEEN_REPLY bit can only be set */
2787 return -EBUSY;
2788
2789 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
2790 /* ASSURED bit can only be set */
2791 return -EBUSY;
2792
2793 /* This check is less strict than ctnetlink_change_status()
2794 * because callers often flip IPS_EXPECTED bits when sending
2795 * an NFQA_CT attribute to the kernel. So ignore the
53b56da8
LZ		 2796 * unchangeable bits but do not error out. Also user programs
2797 * are allowed to clear the bits that they are allowed to change.
a963d710 2798 */
ef69aa3a 2799 __nf_ct_change_status(ct, status, ~status);
a963d710
KC		 2800 return 0;
2801}
2802
9cb01766 2803static int
a4b4766c 2804ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
9cb01766
PNA		 2805{
2806 int err;
2807
2808 if (cda[CTA_TIMEOUT]) {
2809 err = ctnetlink_change_timeout(ct, cda);
2810 if (err < 0)
2811 return err;
2812 }
2813 if (cda[CTA_STATUS]) {
a963d710 2814 err = ctnetlink_update_status(ct, cda);
9cb01766
PNA		 2815 if (err < 0)
2816 return err;
2817 }
2818 if (cda[CTA_HELP]) {
2819 err = ctnetlink_change_helper(ct, cda);
2820 if (err < 0)
2821 return err;
2822 }
9b21f6a9
FW		 2823 if (cda[CTA_LABELS]) {
2824 err = ctnetlink_attach_labels(ct, cda);
2825 if (err < 0)
2826 return err;
2827 }
9cb01766 2828#if defined(CONFIG_NF_CONNTRACK_MARK)
534473c6 2829 if (cda[CTA_MARK]) {
58fc419b 2830 ctnetlink_change_mark(ct, cda);
534473c6 2831 }
9cb01766
PNA		 2832#endif
2833 return 0;
2834}
2835
2836static int
a4b4766c 2837ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
9cb01766
PNA		 2838{
2839 struct nlattr *cda[CTA_MAX+1];
68e035c9 2840 int ret;
9cb01766 2841
8cb08174
JB		 2842 ret = nla_parse_nested_deprecated(cda, CTA_MAX, attr, ct_nla_policy,
2843 NULL);
130ffbc2
DB		 2844 if (ret < 0)
2845 return ret;
9cb01766 2846
88be4c09 2847 return ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
9cb01766
PNA		 2848}
2849
a4b4766c
KM		 2850static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
2851 const struct nf_conn *ct,
2852 struct nf_conntrack_tuple *tuple,
2853 struct nf_conntrack_tuple *mask)
bd077937
PNA		 2854{
2855 int err;
2856
2857 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
deedb590 2858 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2859 if (err < 0)
2860 return err;
2861
2862 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
deedb590 2863 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2864}
2865
2866static int
a4b4766c
KM		 2867ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2868 u32 portid, u32 report)
bd077937
PNA		 2869{
2870 struct nlattr *cda[CTA_EXPECT_MAX+1];
2871 struct nf_conntrack_tuple tuple, mask;
b7e092c0 2872 struct nf_conntrack_helper *helper = NULL;
bd077937
PNA		 2873 struct nf_conntrack_expect *exp;
2874 int err;
2875
8cb08174
JB		 2876 err = nla_parse_nested_deprecated(cda, CTA_EXPECT_MAX, attr,
2877 exp_nla_policy, NULL);
bd077937
PNA		 2878 if (err < 0)
2879 return err;
2880
a4b4766c
KM		 2881 err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
2882 ct, &tuple, &mask);
bd077937
PNA		 2883 if (err < 0)
2884 return err;
2885
2886 if (cda[CTA_EXPECT_HELP_NAME]) {
2887 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2888
2889 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2890 nf_ct_protonum(ct));
2891 if (helper == NULL)
2892 return -EOPNOTSUPP;
2893 }
2894
2895 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2896 helper, &tuple, &mask);
2897 if (IS_ERR(exp))
2898 return PTR_ERR(exp);
2899
3c00fb0b 2900 err = nf_ct_expect_related_report(exp, portid, report, 0);
b18bcb00
LZ		 2901 nf_ct_expect_put(exp);
2902 return err;
bd077937
PNA		 2903}
2904
a4b4766c
KM		 2905static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
2906 enum ip_conntrack_info ctinfo, int diff)
b7bd1809
PNA		 2907{
2908 if (!(ct->status & IPS_NAT_MASK))
2909 return;
2910
2911 nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
2912}
2913
285c8a7a 2914static const struct nfnl_ct_hook ctnetlink_glue_hook = {
a4b4766c
KM		 2915 .build_size = ctnetlink_glue_build_size,
2916 .build = ctnetlink_glue_build,
2917 .parse = ctnetlink_glue_parse,
2918 .attach_expect = ctnetlink_glue_attach_expect,
2919 .seq_adjust = ctnetlink_glue_seqadj,
9cb01766 2920};
83f3e94d 2921#endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
9cb01766 2922
601e68e1
YH		 2923/***********************************************************************
2924 * EXPECT
2925 ***********************************************************************/
c1d10adb 2926
4054ff45
PNA		 2927static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2928 const struct nf_conntrack_tuple *tuple,
a2b7cbdd 2929 u32 type)
c1d10adb 2930{
df6fb868 2931 struct nlattr *nest_parms;
601e68e1 2932
ae0be8de 2933 nest_parms = nla_nest_start(skb, type);
df6fb868
PM		 2934 if (!nest_parms)
2935 goto nla_put_failure;
c1d10adb 2936 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2937 goto nla_put_failure;
2938 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2939
2940 return 0;
2941
df6fb868 2942nla_put_failure:
c1d10adb 2943 return -1;
601e68e1 2944}
c1d10adb 2945
4054ff45
PNA		 2946static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
2947 const struct nf_conntrack_tuple *tuple,
2948 const struct nf_conntrack_tuple_mask *mask)
1cde6436 2949{
b3480fe0 2950 const struct nf_conntrack_l4proto *l4proto;
d4156e8c 2951 struct nf_conntrack_tuple m;
df6fb868 2952 struct nlattr *nest_parms;
b3480fe0 2953 int ret;
d4156e8c
PM		 2954
2955 memset(&m, 0xFF, sizeof(m));
d4156e8c 2956 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c 2957 m.src.u.all = mask->src.u.all;
b58f33d4 2958 m.src.l3num = tuple->src.l3num;
e578756c 2959 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2960
ae0be8de 2961 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK);
df6fb868
PM		 2962 if (!nest_parms)
2963 goto nla_put_failure;
1cde6436 2964
3b988ece 2965 rcu_read_lock();
f957be9d 2966 ret = ctnetlink_dump_tuples_ip(skb, &m);
3b988ece 2967 if (ret >= 0) {
4a60dc74 2968 l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
48ab807c 2969 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2970 }
2971 rcu_read_unlock();
2972
1cde6436 2973 if (unlikely(ret < 0))
df6fb868 2974 goto nla_put_failure;
1cde6436 2975
df6fb868 2976 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2977
2978 return 0;
2979
df6fb868 2980nla_put_failure:
1cde6436
PNA		 2981 return -1;
2982}
2983
224a876e 2984#if IS_ENABLED(CONFIG_NF_NAT)
c7232c99 2985static const union nf_inet_addr any_addr;
224a876e 2986#endif
c7232c99 2987
3c791076
FW		 2988static __be32 nf_expect_get_id(const struct nf_conntrack_expect *exp)
2989{
49ecc2e9 2990 static siphash_aligned_key_t exp_id_seed;
3c791076
FW		 2991 unsigned long a, b, c, d;
2992
2993 net_get_random_once(&exp_id_seed, sizeof(exp_id_seed));
2994
2995 a = (unsigned long)exp;
2996 b = (unsigned long)exp->helper;
2997 c = (unsigned long)exp->master;
2998 d = (unsigned long)siphash(&exp->tuple, sizeof(exp->tuple), &exp_id_seed);
2999
3000#ifdef CONFIG_64BIT
3001 return (__force __be32)siphash_4u64((u64)a, (u64)b, (u64)c, (u64)d, &exp_id_seed);
3002#else
3003 return (__force __be32)siphash_4u32((u32)a, (u32)b, (u32)c, (u32)d, &exp_id_seed);
3004#endif
3005}
3006
bb5cf80e 3007static int
c1d10adb 3008ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 3009 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 3010{
3011 struct nf_conn *master = exp->master;
c1216382 3012 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 3013 struct nf_conn_help *help;
4806e975 3014#if IS_ENABLED(CONFIG_NF_NAT)
076a0ca0
PNA		 3015 struct nlattr *nest_parms;
3016 struct nf_conntrack_tuple nat_tuple = {};
3017#endif
544d5c7d
PNA		 3018 struct nf_ct_helper_expectfn *expfn;
3019
d978e5da
PM		 3020 if (timeout < 0)
3021 timeout = 0;
c1d10adb
PNA		 3022
3023 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 3024 goto nla_put_failure;
1cde6436 3025 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 3026 goto nla_put_failure;
c1d10adb
PNA		 3027 if (ctnetlink_exp_dump_tuple(skb,
3028 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
3029 CTA_EXPECT_MASTER) < 0)
df6fb868 3030 goto nla_put_failure;
601e68e1 3031
4806e975 3032#if IS_ENABLED(CONFIG_NF_NAT)
c7232c99
PM		 3033 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
3034 exp->saved_proto.all) {
ae0be8de 3035 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT);
076a0ca0
PNA		 3036 if (!nest_parms)
3037 goto nla_put_failure;
3038
cc1eb431
DM		 3039 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
3040 goto nla_put_failure;
076a0ca0
PNA		 3041
3042 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 3043 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 3044 nat_tuple.dst.protonum = nf_ct_protonum(master);
3045 nat_tuple.src.u = exp->saved_proto;
3046
3047 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
3048 CTA_EXPECT_NAT_TUPLE) < 0)
3049 goto nla_put_failure;
3050 nla_nest_end(skb, nest_parms);
3051 }
3052#endif
cc1eb431 3053 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
3c791076 3054 nla_put_be32(skb, CTA_EXPECT_ID, nf_expect_get_id(exp)) ||
cc1eb431
DM		 3055 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
3056 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
3057 goto nla_put_failure;
bc01befd
PNA		 3058 help = nfct_help(master);
3059 if (help) {
3060 struct nf_conntrack_helper *helper;
3061
3062 helper = rcu_dereference(help->helper);
cc1eb431
DM		 3063 if (helper &&
3064 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
3065 goto nla_put_failure;
bc01befd 3066 }
544d5c7d 3067 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 3068 if (expfn != NULL &&
3069 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
3070 goto nla_put_failure;
c1d10adb
PNA		 3071
3072 return 0;
601e68e1 3073
df6fb868 3074nla_put_failure:
c1d10adb
PNA		 3075 return -1;
3076}
3077
3078static int
15e47304 3079ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 3080 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 3081{
3082 struct nlmsghdr *nlh;
15e47304 3083 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb 3084
dedb67c4 3085 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event);
19c28b13
PNA		 3086 nlh = nfnl_msg_put(skb, portid, seq, event, flags,
3087 exp->tuple.src.l3num, NFNETLINK_V0, 0);
3088 if (!nlh)
96bcf938 3089 goto nlmsg_failure;
c1d10adb 3090
c1d10adb 3091 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 3092 goto nla_put_failure;
c1d10adb 3093
96bcf938 3094 nlmsg_end(skb, nlh);
c1d10adb
PNA		 3095 return skb->len;
3096
3097nlmsg_failure:
df6fb868 3098nla_put_failure:
96bcf938 3099 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 3100 return -1;
3101}
3102
3103#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a 3104static int
bd1431db 3105ctnetlink_expect_event(unsigned int events, const struct nf_exp_event *item)
c1d10adb 3106{
9592a5c0
AD		 3107 struct nf_conntrack_expect *exp = item->exp;
3108 struct net *net = nf_ct_exp_net(exp);
c1d10adb 3109 struct nlmsghdr *nlh;
c1d10adb 3110 struct sk_buff *skb;
ebbf41df 3111 unsigned int type, group;
c1d10adb
PNA		 3112 int flags = 0;
3113
ebbf41df
PNA		 3114 if (events & (1 << IPEXP_DESTROY)) {
3115 type = IPCTNL_MSG_EXP_DELETE;
3116 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
3117 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 3118 type = IPCTNL_MSG_EXP_NEW;
3119 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 3120 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 3121 } else
e34d5c1a 3122 return 0;
c1d10adb 3123
ebbf41df 3124 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 3125 return 0;
b3a27bfb 3126
96bcf938
PNA		 3127 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3128 if (skb == NULL)
150ace0d 3129 goto errout;
c1d10adb 3130
dedb67c4 3131 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type);
19c28b13
PNA		 3132 nlh = nfnl_msg_put(skb, item->portid, 0, type, flags,
3133 exp->tuple.src.l3num, NFNETLINK_V0, 0);
3134 if (!nlh)
96bcf938 3135 goto nlmsg_failure;
c1d10adb 3136
c1d10adb 3137 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 3138 goto nla_put_failure;
c1d10adb 3139
96bcf938 3140 nlmsg_end(skb, nlh);
15e47304 3141 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 3142 return 0;
c1d10adb 3143
df6fb868 3144nla_put_failure:
96bcf938 3145 nlmsg_cancel(skb, nlh);
528a3a6f 3146nlmsg_failure:
c1d10adb 3147 kfree_skb(skb);
150ace0d 3148errout:
9592a5c0 3149 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 3150 return 0;
c1d10adb
PNA		 3151}
3152#endif
cf6994c2
PM		 3153static int ctnetlink_exp_done(struct netlink_callback *cb)
3154{
31f15875
PM		 3155 if (cb->args[1])
3156 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 3157 return 0;
3158}
c1d10adb
PNA		 3159
3160static int
3161ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
3162{
9592a5c0 3163 struct net *net = sock_net(skb->sk);
cf6994c2 3164 struct nf_conntrack_expect *exp, *last;
96bcf938 3165 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 3166 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 3167
7d0742da 3168 rcu_read_lock();
31f15875
PM		 3169 last = (struct nf_conntrack_expect *)cb->args[1];
3170 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 3171restart:
7cddd967
LZ		 3172 hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]],
3173 hnode) {
31f15875 3174 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 3175 continue;
03d7dc5c
FW		 3176
3177 if (!net_eq(nf_ct_net(exp->master), net))
3178 continue;
3179
31f15875
PM		 3180 if (cb->args[1]) {
3181 if (exp != last)
3182 continue;
3183 cb->args[1] = 0;
3184 }
8b0a231d 3185 if (ctnetlink_exp_fill_info(skb,
15e47304 3186 NETLINK_CB(cb->skb).portid,
31f15875
PM		 3187 cb->nlh->nlmsg_seq,
3188 IPCTNL_MSG_EXP_NEW,
8b0a231d 3189 exp) < 0) {
b54ab92b 3190 if (!refcount_inc_not_zero(&exp->use))
7d0742da 3191 continue;
31f15875
PM		 3192 cb->args[1] = (unsigned long)exp;
3193 goto out;
3194 }
cf6994c2 3195 }
31f15875
PM		 3196 if (cb->args[1]) {
3197 cb->args[1] = 0;
3198 goto restart;
cf6994c2
PM		 3199 }
3200 }
601e68e1 3201out:
7d0742da 3202 rcu_read_unlock();
cf6994c2
PM		 3203 if (last)
3204 nf_ct_expect_put(last);
c1d10adb 3205
c1d10adb
PNA		 3206 return skb->len;
3207}
3208
e844a928
PNA		 3209static int
3210ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
3211{
3212 struct nf_conntrack_expect *exp, *last;
3213 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
3214 struct nf_conn *ct = cb->data;
3215 struct nf_conn_help *help = nfct_help(ct);
3216 u_int8_t l3proto = nfmsg->nfgen_family;
3217
3218 if (cb->args[0])
3219 return 0;
3220
3221 rcu_read_lock();
3222 last = (struct nf_conntrack_expect *)cb->args[1];
3223restart:
7cddd967 3224 hlist_for_each_entry_rcu(exp, &help->expectations, lnode) {
e844a928
PNA		 3225 if (l3proto && exp->tuple.src.l3num != l3proto)
3226 continue;
3227 if (cb->args[1]) {
3228 if (exp != last)
3229 continue;
3230 cb->args[1] = 0;
3231 }
3232 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
3233 cb->nlh->nlmsg_seq,
3234 IPCTNL_MSG_EXP_NEW,
3235 exp) < 0) {
b54ab92b 3236 if (!refcount_inc_not_zero(&exp->use))
e844a928
PNA		 3237 continue;
3238 cb->args[1] = (unsigned long)exp;
3239 goto out;
3240 }
3241 }
3242 if (cb->args[1]) {
3243 cb->args[1] = 0;
3244 goto restart;
3245 }
3246 cb->args[0] = 1;
3247out:
3248 rcu_read_unlock();
3249 if (last)
3250 nf_ct_expect_put(last);
3251
3252 return skb->len;
3253}
3254
7b8002a1
PNA		 3255static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
3256 struct sk_buff *skb,
e844a928 3257 const struct nlmsghdr *nlh,
04ba724b
PNA		 3258 const struct nlattr * const cda[],
3259 struct netlink_ext_ack *extack)
e844a928
PNA		 3260{
3261 int err;
e844a928
PNA		 3262 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
3263 u_int8_t u3 = nfmsg->nfgen_family;
3264 struct nf_conntrack_tuple tuple;
3265 struct nf_conntrack_tuple_hash *h;
3266 struct nf_conn *ct;
308ac914 3267 struct nf_conntrack_zone zone;
e844a928
PNA		 3268 struct netlink_dump_control c = {
3269 .dump = ctnetlink_exp_ct_dump_table,
3270 .done = ctnetlink_exp_done,
3271 };
3272
deedb590
DB		 3273 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
3274 u3, NULL);
e844a928
PNA		 3275 if (err < 0)
3276 return err;
3277
308ac914
DB		 3278 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3279 if (err < 0)
3280 return err;
e844a928 3281
308ac914 3282 h = nf_conntrack_find_get(net, &zone, &tuple);
e844a928
PNA		 3283 if (!h)
3284 return -ENOENT;
3285
3286 ct = nf_ct_tuplehash_to_ctrack(h);
207df815
LZ		 3287 /* No expectation linked to this connection tracking. */
3288 if (!nfct_help(ct)) {
3289 nf_ct_put(ct);
3290 return 0;
3291 }
3292
e844a928
PNA		 3293 c.data = ct;
3294
3295 err = netlink_dump_start(ctnl, skb, nlh, &c);
3296 nf_ct_put(ct);
3297
3298 return err;
3299}
3300
a6555365
PNA		 3301static int ctnetlink_get_expect(struct sk_buff *skb,
3302 const struct nfnl_info *info,
3303 const struct nlattr * const cda[])
c1d10adb 3304{
ef4b65e5 3305 u_int8_t u3 = info->nfmsg->nfgen_family;
c1d10adb
PNA		 3306 struct nf_conntrack_tuple tuple;
3307 struct nf_conntrack_expect *exp;
308ac914 3308 struct nf_conntrack_zone zone;
a6555365 3309 struct sk_buff *skb2;
ef00f89f 3310 int err;
c1d10adb 3311
a6555365 3312 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928 3313 if (cda[CTA_EXPECT_MASTER])
a6555365
PNA		 3314 return ctnetlink_dump_exp_ct(info->net, info->sk, skb,
3315 info->nlh, cda,
3316 info->extack);
e844a928
PNA		 3317 else {
3318 struct netlink_dump_control c = {
3319 .dump = ctnetlink_exp_dump_table,
3320 .done = ctnetlink_exp_done,
3321 };
a6555365 3322 return netlink_dump_start(info->sk, skb, info->nlh, &c);
e844a928 3323 }
c1d10adb
PNA		 3324 }
3325
ef00f89f
PM		 3326 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3327 if (err < 0)
3328 return err;
3329
35dba1d7 3330 if (cda[CTA_EXPECT_TUPLE])
deedb590
DB		 3331 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3332 u3, NULL);
35dba1d7 3333 else if (cda[CTA_EXPECT_MASTER])
deedb590
DB		 3334 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
3335 u3, NULL);
c1d10adb
PNA		 3336 else
3337 return -EINVAL;
3338
3339 if (err < 0)
3340 return err;
3341
a6555365 3342 exp = nf_ct_expect_find_get(info->net, &zone, &tuple);
c1d10adb
PNA		 3343 if (!exp)
3344 return -ENOENT;
3345
df6fb868 3346 if (cda[CTA_EXPECT_ID]) {
77236b6e 3347 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
3c791076
FW		 3348
3349 if (id != nf_expect_get_id(exp)) {
6823645d 3350 nf_ct_expect_put(exp);
c1d10adb
PNA		 3351 return -ENOENT;
3352 }
601e68e1 3353 }
c1d10adb 3354
96bcf938 3355 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
e0241ae6 3356 if (!skb2) {
81378f72 3357 nf_ct_expect_put(exp);
e0241ae6 3358 return -ENOMEM;
81378f72 3359 }
4e9b8269 3360
528a3a6f 3361 rcu_read_lock();
15e47304 3362 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
a6555365
PNA		 3363 info->nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW,
3364 exp);
528a3a6f 3365 rcu_read_unlock();
81378f72 3366 nf_ct_expect_put(exp);
e0241ae6
PNA		 3367 if (err <= 0) {
3368 kfree_skb(skb2);
3369 return -ENOMEM;
3370 }
c1d10adb 3371
e0241ae6 3372 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
c1d10adb
PNA		 3373}
3374
ac7b8483
FW		 3375static bool expect_iter_name(struct nf_conntrack_expect *exp, void *data)
3376{
e14575fa 3377 struct nf_conntrack_helper *helper;
ac7b8483
FW		 3378 const struct nf_conn_help *m_help;
3379 const char *name = data;
3380
3381 m_help = nfct_help(exp->master);
3382
e14575fa
FW		 3383 helper = rcu_dereference(m_help->helper);
3384 if (!helper)
3385 return false;
3386
3387 return strcmp(helper->name, name) == 0;
ac7b8483
FW		 3388}
3389
3390static bool expect_iter_all(struct nf_conntrack_expect *exp, void *data)
3391{
3392 return true;
3393}
3394
a6555365
PNA		 3395static int ctnetlink_del_expect(struct sk_buff *skb,
3396 const struct nfnl_info *info,
3397 const struct nlattr * const cda[])
c1d10adb 3398{
ef4b65e5 3399 u_int8_t u3 = info->nfmsg->nfgen_family;
31f15875 3400 struct nf_conntrack_expect *exp;
c1d10adb 3401 struct nf_conntrack_tuple tuple;
308ac914 3402 struct nf_conntrack_zone zone;
c1d10adb
PNA		 3403 int err;
3404
df6fb868 3405 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 3406 /* delete a single expect by tuple */
ef00f89f
PM		 3407 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3408 if (err < 0)
3409 return err;
3410
deedb590
DB		 3411 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3412 u3, NULL);
c1d10adb
PNA		 3413 if (err < 0)
3414 return err;
3415
3416 /* bump usage count to 2 */
a6555365 3417 exp = nf_ct_expect_find_get(info->net, &zone, &tuple);
c1d10adb
PNA		 3418 if (!exp)
3419 return -ENOENT;
3420
df6fb868 3421 if (cda[CTA_EXPECT_ID]) {
77236b6e 3422 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 3423 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 3424 nf_ct_expect_put(exp);
c1d10adb
PNA		 3425 return -ENOENT;
3426 }
3427 }
3428
3429 /* after list removal, usage count == 1 */
ca7433df 3430 spin_lock_bh(&nf_conntrack_expect_lock);
ebbf41df 3431 if (del_timer(&exp->timeout)) {
15e47304 3432 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
a6555365 3433 nlmsg_report(info->nlh));
ebbf41df
PNA		 3434 nf_ct_expect_put(exp);
3435 }
ca7433df 3436 spin_unlock_bh(&nf_conntrack_expect_lock);
601e68e1 3437 /* have to put what we 'get' above.
c1d10adb 3438 * after this line usage count == 0 */
6823645d 3439 nf_ct_expect_put(exp);
df6fb868
PM		 3440 } else if (cda[CTA_EXPECT_HELP_NAME]) {
3441 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
c1d10adb 3442
a6555365 3443 nf_ct_expect_iterate_net(info->net, expect_iter_name, name,
ac7b8483 3444 NETLINK_CB(skb).portid,
a6555365 3445 nlmsg_report(info->nlh));
c1d10adb
PNA		 3446 } else {
3447 /* This basically means we have to flush everything*/
a6555365 3448 nf_ct_expect_iterate_net(info->net, expect_iter_all, NULL,
ac7b8483 3449 NETLINK_CB(skb).portid,
a6555365 3450 nlmsg_report(info->nlh));
c1d10adb
PNA		 3451 }
3452
3453 return 0;
3454}
3455static int
39938324
PM		 3456ctnetlink_change_expect(struct nf_conntrack_expect *x,
3457 const struct nlattr * const cda[])
c1d10adb 3458{
9768e1ac
KW		 3459 if (cda[CTA_EXPECT_TIMEOUT]) {
3460 if (!del_timer(&x->timeout))
3461 return -ETIME;
3462
3463 x->timeout.expires = jiffies +
3464 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
3465 add_timer(&x->timeout);
3466 }
3467 return 0;
c1d10adb
PNA		 3468}
3469
224a876e 3470#if IS_ENABLED(CONFIG_NF_NAT)
076a0ca0
PNA		 3471static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
3472 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
3473 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
3474};
224a876e 3475#endif
076a0ca0
PNA		 3476
3477static int
3478ctnetlink_parse_expect_nat(const struct nlattr *attr,
3479 struct nf_conntrack_expect *exp,
3480 u_int8_t u3)
3481{
4806e975 3482#if IS_ENABLED(CONFIG_NF_NAT)
076a0ca0
PNA		 3483 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
3484 struct nf_conntrack_tuple nat_tuple = {};
3485 int err;
3486
8cb08174
JB		 3487 err = nla_parse_nested_deprecated(tb, CTA_EXPECT_NAT_MAX, attr,
3488 exp_nat_nla_policy, NULL);
130ffbc2
DB		 3489 if (err < 0)
3490 return err;
076a0ca0
PNA		 3491
3492 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
3493 return -EINVAL;
3494
3495 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
deedb590
DB		 3496 &nat_tuple, CTA_EXPECT_NAT_TUPLE,
3497 u3, NULL);
076a0ca0
PNA		 3498 if (err < 0)
3499 return err;
3500
c7232c99 3501 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 3502 exp->saved_proto = nat_tuple.src.u;
3503 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
3504
3505 return 0;
3506#else
3507 return -EOPNOTSUPP;
3508#endif
3509}
3510
0ef71ee1
PNA		 3511static struct nf_conntrack_expect *
3512ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
3513 struct nf_conntrack_helper *helper,
3514 struct nf_conntrack_tuple *tuple,
3515 struct nf_conntrack_tuple *mask)
c1d10adb 3516{
0ef71ee1 3517 u_int32_t class = 0;
c1d10adb 3518 struct nf_conntrack_expect *exp;
dc808fe2 3519 struct nf_conn_help *help;
0ef71ee1 3520 int err;
660fdb2a 3521
2c62e0bc
GF		 3522 help = nfct_help(ct);
3523 if (!help)
3524 return ERR_PTR(-EOPNOTSUPP);
3525
b8c5e52c
PNA		 3526 if (cda[CTA_EXPECT_CLASS] && helper) {
3527 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
0ef71ee1
PNA		 3528 if (class > helper->expect_class_max)
3529 return ERR_PTR(-EINVAL);
b8c5e52c 3530 }
6823645d 3531 exp = nf_ct_expect_alloc(ct);
0ef71ee1
PNA		 3532 if (!exp)
3533 return ERR_PTR(-ENOMEM);
3534
2c62e0bc
GF		 3535 if (cda[CTA_EXPECT_FLAGS]) {
3536 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3537 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
bc01befd 3538 } else {
2c62e0bc 3539 exp->flags = 0;
bc01befd 3540 }
544d5c7d
PNA		 3541 if (cda[CTA_EXPECT_FN]) {
3542 const char *name = nla_data(cda[CTA_EXPECT_FN]);
3543 struct nf_ct_helper_expectfn *expfn;
3544
3545 expfn = nf_ct_helper_expectfn_find_by_name(name);
3546 if (expfn == NULL) {
3547 err = -EINVAL;
3548 goto err_out;
3549 }
3550 exp->expectfn = expfn->expectfn;
3551 } else
3552 exp->expectfn = NULL;
601e68e1 3553
b8c5e52c 3554 exp->class = class;
c1d10adb 3555 exp->master = ct;
660fdb2a 3556 exp->helper = helper;
0ef71ee1
PNA		 3557 exp->tuple = *tuple;
3558 exp->mask.src.u3 = mask->src.u3;
3559 exp->mask.src.u.all = mask->src.u.all;
c1d10adb 3560
076a0ca0
PNA		 3561 if (cda[CTA_EXPECT_NAT]) {
3562 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
0ef71ee1 3563 exp, nf_ct_l3num(ct));
076a0ca0
PNA		 3564 if (err < 0)
3565 goto err_out;
3566 }
0ef71ee1 3567 return exp;
076a0ca0 3568err_out:
6823645d 3569 nf_ct_expect_put(exp);
0ef71ee1
PNA		 3570 return ERR_PTR(err);
3571}
3572
3573static int
308ac914
DB		 3574ctnetlink_create_expect(struct net *net,
3575 const struct nf_conntrack_zone *zone,
0ef71ee1
PNA		 3576 const struct nlattr * const cda[],
3577 u_int8_t u3, u32 portid, int report)
3578{
3579 struct nf_conntrack_tuple tuple, mask, master_tuple;
3580 struct nf_conntrack_tuple_hash *h = NULL;
3581 struct nf_conntrack_helper *helper = NULL;
3582 struct nf_conntrack_expect *exp;
3583 struct nf_conn *ct;
3584 int err;
3585
3586 /* caller guarantees that those three CTA_EXPECT_* exist */
deedb590
DB		 3587 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3588 u3, NULL);
0ef71ee1
PNA		 3589 if (err < 0)
3590 return err;
deedb590
DB		 3591 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
3592 u3, NULL);
0ef71ee1
PNA		 3593 if (err < 0)
3594 return err;
deedb590
DB		 3595 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
3596 u3, NULL);
0ef71ee1
PNA		 3597 if (err < 0)
3598 return err;
3599
3600 /* Look for master conntrack of this expectation */
3601 h = nf_conntrack_find_get(net, zone, &master_tuple);
3602 if (!h)
3603 return -ENOENT;
3604 ct = nf_ct_tuplehash_to_ctrack(h);
3605
8b5995d0 3606 rcu_read_lock();
0ef71ee1
PNA		 3607 if (cda[CTA_EXPECT_HELP_NAME]) {
3608 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
3609
3610 helper = __nf_conntrack_helper_find(helpname, u3,
3611 nf_ct_protonum(ct));
3612 if (helper == NULL) {
8b5995d0 3613 rcu_read_unlock();
0ef71ee1
PNA		 3614#ifdef CONFIG_MODULES
3615 if (request_module("nfct-helper-%s", helpname) < 0) {
3616 err = -EOPNOTSUPP;
3617 goto err_ct;
3618 }
8b5995d0 3619 rcu_read_lock();
0ef71ee1
PNA		 3620 helper = __nf_conntrack_helper_find(helpname, u3,
3621 nf_ct_protonum(ct));
3622 if (helper) {
3623 err = -EAGAIN;
8b5995d0 3624 goto err_rcu;
0ef71ee1 3625 }
8b5995d0 3626 rcu_read_unlock();
0ef71ee1
PNA		 3627#endif
3628 err = -EOPNOTSUPP;
3629 goto err_ct;
3630 }
3631 }
3632
3633 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
3634 if (IS_ERR(exp)) {
3635 err = PTR_ERR(exp);
8b5995d0 3636 goto err_rcu;
0ef71ee1
PNA		 3637 }
3638
3c00fb0b 3639 err = nf_ct_expect_related_report(exp, portid, report, 0);
0ef71ee1 3640 nf_ct_expect_put(exp);
8b5995d0
GF		 3641err_rcu:
3642 rcu_read_unlock();
0ef71ee1
PNA		 3643err_ct:
3644 nf_ct_put(ct);
c1d10adb
PNA		 3645 return err;
3646}
3647
a6555365
PNA		 3648static int ctnetlink_new_expect(struct sk_buff *skb,
3649 const struct nfnl_info *info,
3650 const struct nlattr * const cda[])
c1d10adb 3651{
ef4b65e5 3652 u_int8_t u3 = info->nfmsg->nfgen_family;
c1d10adb
PNA		 3653 struct nf_conntrack_tuple tuple;
3654 struct nf_conntrack_expect *exp;
308ac914 3655 struct nf_conntrack_zone zone;
ef00f89f 3656 int err;
c1d10adb 3657
df6fb868
PM		 3658 if (!cda[CTA_EXPECT_TUPLE]
3659 || !cda[CTA_EXPECT_MASK]
3660 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 3661 return -EINVAL;
3662
ef00f89f
PM		 3663 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3664 if (err < 0)
3665 return err;
3666
deedb590
DB		 3667 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3668 u3, NULL);
c1d10adb
PNA		 3669 if (err < 0)
3670 return err;
3671
ca7433df 3672 spin_lock_bh(&nf_conntrack_expect_lock);
a6555365 3673 exp = __nf_ct_expect_find(info->net, &zone, &tuple);
c1d10adb 3674 if (!exp) {
ca7433df 3675 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3676 err = -ENOENT;
a6555365
PNA		 3677 if (info->nlh->nlmsg_flags & NLM_F_CREATE) {
3678 err = ctnetlink_create_expect(info->net, &zone, cda, u3,
15e47304 3679 NETLINK_CB(skb).portid,
a6555365 3680 nlmsg_report(info->nlh));
19abb7b0 3681 }
c1d10adb
PNA		 3682 return err;
3683 }
3684
3685 err = -EEXIST;
a6555365 3686 if (!(info->nlh->nlmsg_flags & NLM_F_EXCL))
c1d10adb 3687 err = ctnetlink_change_expect(exp, cda);
ca7433df 3688 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3689
c1d10adb
PNA		 3690 return err;
3691}
3692
392025f8 3693static int
15e47304 3694ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 3695 const struct ip_conntrack_stat *st)
3696{
3697 struct nlmsghdr *nlh;
15e47304 3698 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 3699
dedb67c4
PNA		 3700 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
3701 IPCTNL_MSG_EXP_GET_STATS_CPU);
19c28b13
PNA		 3702 nlh = nfnl_msg_put(skb, portid, seq, event, flags, AF_UNSPEC,
3703 NFNETLINK_V0, htons(cpu));
3704 if (!nlh)
392025f8
PNA		 3705 goto nlmsg_failure;
3706
392025f8
PNA		 3707 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3708 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3709 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3710 goto nla_put_failure;
3711
3712 nlmsg_end(skb, nlh);
3713 return skb->len;
3714
3715nla_put_failure:
3716nlmsg_failure:
3717 nlmsg_cancel(skb, nlh);
3718 return -1;
3719}
3720
3721static int
3722ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3723{
3724 int cpu;
3725 struct net *net = sock_net(skb->sk);
3726
3727 if (cb->args[0] == nr_cpu_ids)
3728 return 0;
3729
3730 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3731 const struct ip_conntrack_stat *st;
3732
3733 if (!cpu_possible(cpu))
3734 continue;
3735
3736 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 3737 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 3738 cb->nlh->nlmsg_seq,
3739 cpu, st) < 0)
3740 break;
3741 }
3742 cb->args[0] = cpu;
3743
3744 return skb->len;
3745}
3746
a6555365
PNA		 3747static int ctnetlink_stat_exp_cpu(struct sk_buff *skb,
3748 const struct nfnl_info *info,
3749 const struct nlattr * const cda[])
392025f8 3750{
a6555365 3751 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
392025f8
PNA		 3752 struct netlink_dump_control c = {
3753 .dump = ctnetlink_exp_stat_cpu_dump,
3754 };
a6555365 3755 return netlink_dump_start(info->sk, skb, info->nlh, &c);
392025f8
PNA		 3756 }
3757
3758 return 0;
3759}
3760
c1d10adb 3761#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a 3762static struct nf_ct_event_notifier ctnl_notifier = {
b86c0e64 3763 .ct_event = ctnetlink_conntrack_event,
b86c0e64 3764 .exp_event = ctnetlink_expect_event,
c1d10adb
PNA		 3765};
3766#endif
3767
7c8d4cb4 3768static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
50f2db9e
PNA		 3769 [IPCTNL_MSG_CT_NEW] = {
3770 .call = ctnetlink_new_conntrack,
3771 .type = NFNL_CB_MUTEX,
3772 .attr_count = CTA_MAX,
3773 .policy = ct_nla_policy
3774 },
3775 [IPCTNL_MSG_CT_GET] = {
3776 .call = ctnetlink_get_conntrack,
3777 .type = NFNL_CB_MUTEX,
3778 .attr_count = CTA_MAX,
3779 .policy = ct_nla_policy
3780 },
3781 [IPCTNL_MSG_CT_DELETE] = {
3782 .call = ctnetlink_del_conntrack,
3783 .type = NFNL_CB_MUTEX,
3784 .attr_count = CTA_MAX,
3785 .policy = ct_nla_policy
3786 },
3787 [IPCTNL_MSG_CT_GET_CTRZERO] = {
3788 .call = ctnetlink_get_conntrack,
3789 .type = NFNL_CB_MUTEX,
3790 .attr_count = CTA_MAX,
3791 .policy = ct_nla_policy
3792 },
3793 [IPCTNL_MSG_CT_GET_STATS_CPU] = {
3794 .call = ctnetlink_stat_ct_cpu,
3795 .type = NFNL_CB_MUTEX,
3796 },
3797 [IPCTNL_MSG_CT_GET_STATS] = {
3798 .call = ctnetlink_stat_ct,
3799 .type = NFNL_CB_MUTEX,
3800 },
3801 [IPCTNL_MSG_CT_GET_DYING] = {
3802 .call = ctnetlink_get_ct_dying,
3803 .type = NFNL_CB_MUTEX,
3804 },
3805 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = {
3806 .call = ctnetlink_get_ct_unconfirmed,
3807 .type = NFNL_CB_MUTEX,
3808 },
c1d10adb
PNA		 3809};
3810
7c8d4cb4 3811static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
50f2db9e
PNA		 3812 [IPCTNL_MSG_EXP_GET] = {
3813 .call = ctnetlink_get_expect,
3814 .type = NFNL_CB_MUTEX,
3815 .attr_count = CTA_EXPECT_MAX,
3816 .policy = exp_nla_policy
3817 },
3818 [IPCTNL_MSG_EXP_NEW] = {
3819 .call = ctnetlink_new_expect,
3820 .type = NFNL_CB_MUTEX,
3821 .attr_count = CTA_EXPECT_MAX,
3822 .policy = exp_nla_policy
3823 },
3824 [IPCTNL_MSG_EXP_DELETE] = {
3825 .call = ctnetlink_del_expect,
3826 .type = NFNL_CB_MUTEX,
3827 .attr_count = CTA_EXPECT_MAX,
3828 .policy = exp_nla_policy
3829 },
3830 [IPCTNL_MSG_EXP_GET_STATS_CPU] = {
3831 .call = ctnetlink_stat_exp_cpu,
3832 .type = NFNL_CB_MUTEX,
3833 },
c1d10adb
PNA		 3834};
3835
7c8d4cb4 3836static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 3837 .name = "conntrack",
3838 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3839 .cb_count = IPCTNL_MSG_MAX,
3840 .cb = ctnl_cb,
3841};
3842
7c8d4cb4 3843static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 3844 .name = "conntrack_expect",
3845 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3846 .cb_count = IPCTNL_MSG_EXP_MAX,
3847 .cb = ctnl_exp_cb,
3848};
3849
d2483dde 3850MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 3851MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 3852MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 3853
70e9942f
PNA		 3854static int __net_init ctnetlink_net_init(struct net *net)
3855{
3856#ifdef CONFIG_NF_CONNTRACK_EVENTS
b86c0e64 3857 nf_conntrack_register_notifier(net, &ctnl_notifier);
70e9942f
PNA		 3858#endif
3859 return 0;
70e9942f
PNA		 3860}
3861
bd1431db 3862static void ctnetlink_net_pre_exit(struct net *net)
70e9942f
PNA		 3863{
3864#ifdef CONFIG_NF_CONNTRACK_EVENTS
b86c0e64 3865 nf_conntrack_unregister_notifier(net);
70e9942f
PNA		 3866#endif
3867}
3868
70e9942f
PNA		 3869static struct pernet_operations ctnetlink_net_ops = {
3870 .init = ctnetlink_net_init,
bd1431db 3871 .pre_exit = ctnetlink_net_pre_exit,
70e9942f
PNA		 3872};
3873
c1d10adb
PNA		 3874static int __init ctnetlink_init(void)
3875{
3876 int ret;
3877
ec8f7d49 3878 NL_ASSERT_DUMP_CTX_FITS(struct ctnetlink_list_dump_ctx);
5948ed29 3879
c1d10adb
PNA		 3880 ret = nfnetlink_subsys_register(&ctnl_subsys);
3881 if (ret < 0) {
654d0fbd 3882 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 3883 goto err_out;
3884 }
3885
3886 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3887 if (ret < 0) {
654d0fbd 3888 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 3889 goto err_unreg_subsys;
3890 }
3891
ef6acf68
JL		 3892 ret = register_pernet_subsys(&ctnetlink_net_ops);
3893 if (ret < 0) {
70e9942f 3894 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 3895 goto err_unreg_exp_subsys;
3896 }
83f3e94d 3897#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 3898 /* setup interaction between nf_queue and nf_conntrack_netlink. */
a4b4766c 3899 RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook);
9cb01766 3900#endif
c1d10adb
PNA		 3901 return 0;
3902
c1d10adb
PNA		 3903err_unreg_exp_subsys:
3904 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 3905err_unreg_subsys:
3906 nfnetlink_subsys_unregister(&ctnl_subsys);
3907err_out:
3908 return ret;
3909}
3910
3911static void __exit ctnetlink_exit(void)
3912{
70e9942f 3913 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 3914 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3915 nfnetlink_subsys_unregister(&ctnl_subsys);
83f3e94d 3916#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
a4b4766c 3917 RCU_INIT_POINTER(nfnl_ct_hook, NULL);
9cb01766 3918#endif
3b7dabf0 3919 synchronize_rcu();
c1d10adb
PNA		 3920}
3921
3922module_init(ctnetlink_init);
3923module_exit(ctnetlink_exit);
Linux 6.x block layer and io_uring tree(s)