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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
[linux-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
PNA		 59MODULE_LICENSE("GPL");
60
5948ed29
FW		 61struct ctnetlink_list_dump_ctx {
62 struct nf_conn *last;
63 unsigned int cpu;
64 bool done;
65};
66
4054ff45 67static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
2a04aabf
JL		 68 const struct nf_conntrack_tuple *tuple,
69 const struct nf_conntrack_l4proto *l4proto)
c1d10adb 70{
c1d10adb 71 int ret = 0;
df6fb868 72 struct nlattr *nest_parms;
c1d10adb 73
ae0be8de 74 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO);
df6fb868
PM		 75 if (!nest_parms)
76 goto nla_put_failure;
cc1eb431
DM		 77 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
78 goto nla_put_failure;
c1d10adb 79
fdf70832
PM		 80 if (likely(l4proto->tuple_to_nlattr))
81 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 82
df6fb868 83 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 84
85 return ret;
86
df6fb868 87nla_put_failure:
c1d10adb
PNA		 88 return -1;
89}
90
f957be9d
FW		 91static int ipv4_tuple_to_nlattr(struct sk_buff *skb,
92 const struct nf_conntrack_tuple *tuple)
93{
94 if (nla_put_in_addr(skb, CTA_IP_V4_SRC, tuple->src.u3.ip) ||
95 nla_put_in_addr(skb, CTA_IP_V4_DST, tuple->dst.u3.ip))
96 return -EMSGSIZE;
97 return 0;
98}
99
100static int ipv6_tuple_to_nlattr(struct sk_buff *skb,
101 const struct nf_conntrack_tuple *tuple)
102{
103 if (nla_put_in6_addr(skb, CTA_IP_V6_SRC, &tuple->src.u3.in6) ||
104 nla_put_in6_addr(skb, CTA_IP_V6_DST, &tuple->dst.u3.in6))
105 return -EMSGSIZE;
106 return 0;
107}
108
4054ff45 109static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
f957be9d 110 const struct nf_conntrack_tuple *tuple)
c1d10adb 111{
c1d10adb 112 int ret = 0;
df6fb868
PM		 113 struct nlattr *nest_parms;
114
ae0be8de 115 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP);
df6fb868
PM		 116 if (!nest_parms)
117 goto nla_put_failure;
1cde6436 118
f957be9d
FW		 119 switch (tuple->src.l3num) {
120 case NFPROTO_IPV4:
121 ret = ipv4_tuple_to_nlattr(skb, tuple);
122 break;
123 case NFPROTO_IPV6:
124 ret = ipv6_tuple_to_nlattr(skb, tuple);
125 break;
126 }
1cde6436 127
df6fb868 128 nla_nest_end(skb, nest_parms);
c1d10adb 129
1cde6436
PNA		 130 return ret;
131
df6fb868 132nla_put_failure:
1cde6436
PNA		 133 return -1;
134}
135
4054ff45
PNA		 136static int ctnetlink_dump_tuples(struct sk_buff *skb,
137 const struct nf_conntrack_tuple *tuple)
1cde6436 138{
b3480fe0 139 const struct nf_conntrack_l4proto *l4proto;
1cde6436 140 int ret;
1cde6436 141
3b988ece 142 rcu_read_lock();
f957be9d 143 ret = ctnetlink_dump_tuples_ip(skb, tuple);
c1d10adb 144
3b988ece 145 if (ret >= 0) {
4a60dc74 146 l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
3b988ece
HS		 147 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
148 }
149 rcu_read_unlock();
c1d10adb 150 return ret;
c1d10adb
PNA		 151}
152
4054ff45
PNA		 153static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
154 const struct nf_conntrack_zone *zone, int dir)
deedb590
DB		 155{
156 if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
157 return 0;
158 if (nla_put_be16(skb, attrtype, htons(zone->id)))
159 goto nla_put_failure;
160 return 0;
161
162nla_put_failure:
163 return -1;
164}
165
4054ff45 166static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 167{
cc1eb431
DM		 168 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
169 goto nla_put_failure;
c1d10adb
PNA		 170 return 0;
171
df6fb868 172nla_put_failure:
c1d10adb
PNA		 173 return -1;
174}
175
86d21fc7
FW		 176static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct,
177 bool skip_zero)
c1d10adb 178{
d0b35b93 179 long timeout = nf_ct_expires(ct) / HZ;
601e68e1 180
86d21fc7
FW		 181 if (skip_zero && timeout == 0)
182 return 0;
183
cc1eb431
DM		 184 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
185 goto nla_put_failure;
c1d10adb
PNA		 186 return 0;
187
df6fb868 188nla_put_failure:
c1d10adb
PNA		 189 return -1;
190}
191
86d21fc7
FW		 192static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct,
193 bool destroy)
c1d10adb 194{
b3480fe0 195 const struct nf_conntrack_l4proto *l4proto;
df6fb868 196 struct nlattr *nest_proto;
c1d10adb
PNA		 197 int ret;
198
4a60dc74 199 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
528a3a6f 200 if (!l4proto->to_nlattr)
c1d10adb 201 return 0;
601e68e1 202
ae0be8de 203 nest_proto = nla_nest_start(skb, CTA_PROTOINFO);
df6fb868
PM		 204 if (!nest_proto)
205 goto nla_put_failure;
c1d10adb 206
86d21fc7 207 ret = l4proto->to_nlattr(skb, nest_proto, ct, destroy);
c1d10adb 208
df6fb868 209 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 210
211 return ret;
212
df6fb868 213nla_put_failure:
c1d10adb
PNA		 214 return -1;
215}
216
4054ff45
PNA		 217static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
218 const struct nf_conn *ct)
c1d10adb 219{
df6fb868 220 struct nlattr *nest_helper;
dc808fe2 221 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 222 struct nf_conntrack_helper *helper;
c1d10adb 223
3c158f7f 224 if (!help)
c1d10adb 225 return 0;
601e68e1 226
c23a9fd2 227 rcu_read_lock();
3c158f7f
PM		 228 helper = rcu_dereference(help->helper);
229 if (!helper)
230 goto out;
231
ae0be8de 232 nest_helper = nla_nest_start(skb, CTA_HELP);
df6fb868
PM		 233 if (!nest_helper)
234 goto nla_put_failure;
cc1eb431
DM		 235 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
236 goto nla_put_failure;
c1d10adb 237
fdf70832
PM		 238 if (helper->to_nlattr)
239 helper->to_nlattr(skb, ct);
c1d10adb 240
df6fb868 241 nla_nest_end(skb, nest_helper);
3c158f7f 242out:
c23a9fd2 243 rcu_read_unlock();
c1d10adb
PNA		 244 return 0;
245
df6fb868 246nla_put_failure:
c23a9fd2 247 rcu_read_unlock();
c1d10adb
PNA		 248 return -1;
249}
250
bb5cf80e 251static int
4542fa47
HE		 252dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
253 enum ip_conntrack_dir dir, int type)
c1d10adb 254{
4542fa47
HE		 255 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
256 struct nf_conn_counter *counter = acct->counter;
df6fb868 257 struct nlattr *nest_count;
4542fa47 258 u64 pkts, bytes;
c1d10adb 259
4542fa47
HE		 260 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
261 pkts = atomic64_xchg(&counter[dir].packets, 0);
262 bytes = atomic64_xchg(&counter[dir].bytes, 0);
263 } else {
264 pkts = atomic64_read(&counter[dir].packets);
265 bytes = atomic64_read(&counter[dir].bytes);
266 }
267
ae0be8de 268 nest_count = nla_nest_start(skb, attr);
df6fb868
PM		 269 if (!nest_count)
270 goto nla_put_failure;
271
b46f6ded
ND		 272 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
273 CTA_COUNTERS_PAD) ||
274 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
275 CTA_COUNTERS_PAD))
cc1eb431 276 goto nla_put_failure;
c1d10adb 277
df6fb868 278 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 279
280 return 0;
281
df6fb868 282nla_put_failure:
c1d10adb
PNA		 283 return -1;
284}
c1d10adb 285
80e60e67 286static int
4542fa47 287ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
80e60e67 288{
4542fa47 289 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
80e60e67 290
80e60e67
PNA		 291 if (!acct)
292 return 0;
293
4542fa47
HE		 294 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
295 return -1;
296 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
297 return -1;
298
299 return 0;
80e60e67
PNA		 300}
301
a992ca2a
PNA		 302static int
303ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
304{
305 struct nlattr *nest_count;
306 const struct nf_conn_tstamp *tstamp;
307
308 tstamp = nf_conn_tstamp_find(ct);
309 if (!tstamp)
310 return 0;
311
ae0be8de 312 nest_count = nla_nest_start(skb, CTA_TIMESTAMP);
a992ca2a
PNA		 313 if (!nest_count)
314 goto nla_put_failure;
315
b46f6ded
ND		 316 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
317 CTA_TIMESTAMP_PAD) ||
cc1eb431 318 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
b46f6ded
ND		 319 cpu_to_be64(tstamp->stop),
320 CTA_TIMESTAMP_PAD)))
cc1eb431 321 goto nla_put_failure;
a992ca2a
PNA		 322 nla_nest_end(skb, nest_count);
323
324 return 0;
325
326nla_put_failure:
327 return -1;
328}
329
c1d10adb 330#ifdef CONFIG_NF_CONNTRACK_MARK
4054ff45 331static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 332{
cc1eb431
DM		 333 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
334 goto nla_put_failure;
c1d10adb
PNA		 335 return 0;
336
df6fb868 337nla_put_failure:
c1d10adb
PNA		 338 return -1;
339}
340#else
341#define ctnetlink_dump_mark(a, b) (0)
342#endif
343
37fccd85 344#ifdef CONFIG_NF_CONNTRACK_SECMARK
4054ff45 345static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 346{
1cc63249
EP		 347 struct nlattr *nest_secctx;
348 int len, ret;
349 char *secctx;
350
351 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
352 if (ret)
cba85b53 353 return 0;
1cc63249
EP		 354
355 ret = -1;
ae0be8de 356 nest_secctx = nla_nest_start(skb, CTA_SECCTX);
1cc63249
EP		 357 if (!nest_secctx)
358 goto nla_put_failure;
37fccd85 359
cc1eb431
DM		 360 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
361 goto nla_put_failure;
1cc63249
EP		 362 nla_nest_end(skb, nest_secctx);
363
364 ret = 0;
37fccd85 365nla_put_failure:
1cc63249
EP		 366 security_release_secctx(secctx, len);
367 return ret;
37fccd85
PNA		 368}
369#else
1cc63249 370#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 371#endif
372
0ceabd83 373#ifdef CONFIG_NF_CONNTRACK_LABELS
4a96300c 374static inline int ctnetlink_label_size(const struct nf_conn *ct)
0ceabd83
FW		 375{
376 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
377
378 if (!labels)
379 return 0;
23014011 380 return nla_total_size(sizeof(labels->bits));
0ceabd83
FW		 381}
382
383static int
384ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
385{
386 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
23014011 387 unsigned int i;
0ceabd83
FW		 388
389 if (!labels)
390 return 0;
391
0ceabd83
FW		 392 i = 0;
393 do {
394 if (labels->bits[i] != 0)
23014011
FW		 395 return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
396 labels->bits);
0ceabd83 397 i++;
23014011 398 } while (i < ARRAY_SIZE(labels->bits));
0ceabd83
FW		 399
400 return 0;
401}
402#else
403#define ctnetlink_dump_labels(a, b) (0)
404#define ctnetlink_label_size(a) (0)
405#endif
406
0f417ce9
PNA		 407#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
408
4054ff45 409static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
0f417ce9
PNA		 410{
411 struct nlattr *nest_parms;
412
413 if (!(ct->status & IPS_EXPECTED))
414 return 0;
415
ae0be8de 416 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER);
0f417ce9
PNA		 417 if (!nest_parms)
418 goto nla_put_failure;
419 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
420 goto nla_put_failure;
421 nla_nest_end(skb, nest_parms);
422
423 return 0;
424
425nla_put_failure:
426 return -1;
427}
428
bb5cf80e 429static int
41d73ec0 430dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
13eae15a 431{
13eae15a
PNA		 432 struct nlattr *nest_parms;
433
ae0be8de 434 nest_parms = nla_nest_start(skb, type);
13eae15a
PNA		 435 if (!nest_parms)
436 goto nla_put_failure;
437
41d73ec0
PM		 438 if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
439 htonl(seq->correction_pos)) ||
440 nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
441 htonl(seq->offset_before)) ||
442 nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
443 htonl(seq->offset_after)))
cc1eb431 444 goto nla_put_failure;
13eae15a
PNA		 445
446 nla_nest_end(skb, nest_parms);
447
448 return 0;
449
450nla_put_failure:
451 return -1;
452}
453
64f3967c 454static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, struct nf_conn *ct)
13eae15a 455{
41d73ec0
PM		 456 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
457 struct nf_ct_seqadj *seq;
13eae15a 458
41d73ec0 459 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
13eae15a
PNA		 460 return 0;
461
64f3967c 462 spin_lock_bh(&ct->lock);
41d73ec0
PM		 463 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
464 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
64f3967c 465 goto err;
13eae15a 466
41d73ec0
PM		 467 seq = &seqadj->seq[IP_CT_DIR_REPLY];
468 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
64f3967c 469 goto err;
13eae15a 470
64f3967c 471 spin_unlock_bh(&ct->lock);
13eae15a 472 return 0;
64f3967c
LZ		 473err:
474 spin_unlock_bh(&ct->lock);
475 return -1;
13eae15a 476}
13eae15a 477
20710b3b
PNA		 478static int ctnetlink_dump_ct_synproxy(struct sk_buff *skb, struct nf_conn *ct)
479{
480 struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
481 struct nlattr *nest_parms;
482
483 if (!synproxy)
484 return 0;
485
ae0be8de 486 nest_parms = nla_nest_start(skb, CTA_SYNPROXY);
20710b3b
PNA		 487 if (!nest_parms)
488 goto nla_put_failure;
489
490 if (nla_put_be32(skb, CTA_SYNPROXY_ISN, htonl(synproxy->isn)) ||
491 nla_put_be32(skb, CTA_SYNPROXY_ITS, htonl(synproxy->its)) ||
492 nla_put_be32(skb, CTA_SYNPROXY_TSOFF, htonl(synproxy->tsoff)))
493 goto nla_put_failure;
494
495 nla_nest_end(skb, nest_parms);
496
497 return 0;
498
499nla_put_failure:
500 return -1;
501}
502
4054ff45 503static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 504{
3c791076
FW		 505 __be32 id = (__force __be32)nf_ct_get_id(ct);
506
507 if (nla_put_be32(skb, CTA_ID, id))
cc1eb431 508 goto nla_put_failure;
c1d10adb
PNA		 509 return 0;
510
df6fb868 511nla_put_failure:
c1d10adb
PNA		 512 return -1;
513}
514
4054ff45 515static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 516{
71977437 517 if (nla_put_be32(skb, CTA_USE, htonl(refcount_read(&ct->ct_general.use))))
cc1eb431 518 goto nla_put_failure;
c1d10adb
PNA		 519 return 0;
520
df6fb868 521nla_put_failure:
c1d10adb
PNA		 522 return -1;
523}
524
49ca022b
FW		 525/* all these functions access ct->ext. Caller must either hold a reference
526 * on ct or prevent its deletion by holding either the bucket spinlock or
527 * pcpu dying list lock.
528 */
529static int ctnetlink_dump_extinfo(struct sk_buff *skb,
530 struct nf_conn *ct, u32 type)
531{
532 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
533 ctnetlink_dump_timestamp(skb, ct) < 0 ||
534 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
535 ctnetlink_dump_labels(skb, ct) < 0 ||
536 ctnetlink_dump_ct_seq_adj(skb, ct) < 0 ||
537 ctnetlink_dump_ct_synproxy(skb, ct) < 0)
538 return -1;
539
540 return 0;
541}
542
543static int ctnetlink_dump_info(struct sk_buff *skb, struct nf_conn *ct)
544{
545 if (ctnetlink_dump_status(skb, ct) < 0 ||
546 ctnetlink_dump_mark(skb, ct) < 0 ||
547 ctnetlink_dump_secctx(skb, ct) < 0 ||
548 ctnetlink_dump_id(skb, ct) < 0 ||
549 ctnetlink_dump_use(skb, ct) < 0 ||
550 ctnetlink_dump_master(skb, ct) < 0)
551 return -1;
552
553 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status) &&
86d21fc7
FW		 554 (ctnetlink_dump_timeout(skb, ct, false) < 0 ||
555 ctnetlink_dump_protoinfo(skb, ct, false) < 0))
49ca022b
FW		 556 return -1;
557
558 return 0;
559}
560
c1d10adb 561static int
15e47304 562ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
cb8aa9a3 563 struct nf_conn *ct, bool extinfo, unsigned int flags)
c1d10adb 564{
308ac914 565 const struct nf_conntrack_zone *zone;
c1d10adb 566 struct nlmsghdr *nlh;
df6fb868 567 struct nlattr *nest_parms;
cb8aa9a3 568 unsigned int event;
c1d10adb 569
cb8aa9a3
RB		 570 if (portid)
571 flags |= NLM_F_MULTI;
dedb67c4 572 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW);
19c28b13
PNA		 573 nlh = nfnl_msg_put(skb, portid, seq, event, flags, nf_ct_l3num(ct),
574 NFNETLINK_V0, 0);
575 if (!nlh)
96bcf938 576 goto nlmsg_failure;
c1d10adb 577
deedb590
DB		 578 zone = nf_ct_zone(ct);
579
ae0be8de 580 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
df6fb868
PM		 581 if (!nest_parms)
582 goto nla_put_failure;
f2f3e38c 583 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 584 goto nla_put_failure;
deedb590
DB		 585 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
586 NF_CT_ZONE_DIR_ORIG) < 0)
587 goto nla_put_failure;
df6fb868 588 nla_nest_end(skb, nest_parms);
601e68e1 589
ae0be8de 590 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
df6fb868
PM		 591 if (!nest_parms)
592 goto nla_put_failure;
f2f3e38c 593 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 594 goto nla_put_failure;
deedb590
DB		 595 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
596 NF_CT_ZONE_DIR_REPL) < 0)
597 goto nla_put_failure;
df6fb868 598 nla_nest_end(skb, nest_parms);
c1d10adb 599
deedb590
DB		 600 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
601 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 602 goto nla_put_failure;
ef00f89f 603
49ca022b 604 if (ctnetlink_dump_info(skb, ct) < 0)
df6fb868 605 goto nla_put_failure;
49ca022b 606 if (extinfo && ctnetlink_dump_extinfo(skb, ct, type) < 0)
b067fa00
PNA		 607 goto nla_put_failure;
608
96bcf938 609 nlmsg_end(skb, nlh);
c1d10adb
PNA		 610 return skb->len;
611
612nlmsg_failure:
df6fb868 613nla_put_failure:
96bcf938 614 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 615 return -1;
616}
617
f957be9d
FW		 618static const struct nla_policy cta_ip_nla_policy[CTA_IP_MAX + 1] = {
619 [CTA_IP_V4_SRC] = { .type = NLA_U32 },
620 [CTA_IP_V4_DST] = { .type = NLA_U32 },
621 [CTA_IP_V6_SRC] = { .len = sizeof(__be32) * 4 },
622 [CTA_IP_V6_DST] = { .len = sizeof(__be32) * 4 },
623};
624
8252fcea 625#if defined(CONFIG_NETFILTER_NETLINK_GLUE_CT) || defined(CONFIG_NF_CONNTRACK_EVENTS)
5caaed15 626static size_t ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4 627{
b3480fe0 628 const struct nf_conntrack_l4proto *l4proto;
5caaed15 629 size_t len, len4 = 0;
03b64f51 630
f957be9d 631 len = nla_policy_len(cta_ip_nla_policy, CTA_IP_MAX + 1);
0d035100 632 len *= 3u; /* ORIG, REPLY, MASTER */
03b64f51 633
4a60dc74 634 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
39215846 635 len += l4proto->nlattr_size;
5caaed15
FW		 636 if (l4proto->nlattr_tuple_size) {
637 len4 = l4proto->nlattr_tuple_size();
638 len4 *= 3u; /* ORIG, REPLY, MASTER */
639 }
03b64f51 640
5caaed15 641 return len + len4;
03b64f51 642}
8252fcea 643#endif
03b64f51 644
4a96300c 645static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
d26e6a02
JP		 646{
647 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
648 return 0;
649 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
b46f6ded
ND		 650 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
651 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
d26e6a02
JP		 652 ;
653}
654
4a96300c 655static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 656{
cba85b53
PNA		 657#ifdef CONFIG_NF_CONNTRACK_SECMARK
658 int len, ret;
1cc63249 659
cba85b53
PNA		 660 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
661 if (ret)
662 return 0;
1cc63249 663
cba85b53
PNA		 664 return nla_total_size(0) /* CTA_SECCTX */
665 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
666#else
667 return 0;
1cc63249 668#endif
cba85b53 669}
1cc63249 670
4a96300c 671static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
a992ca2a
PNA		 672{
673#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
674 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
675 return 0;
b46f6ded 676 return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
a992ca2a
PNA		 677#else
678 return 0;
679#endif
680}
681
4054ff45
PNA		 682#ifdef CONFIG_NF_CONNTRACK_EVENTS
683static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
03b64f51
PNA		 684{
685 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
686 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
687 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
688 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
689 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
690 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
691 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
f7b13e43 692 + ctnetlink_acct_size(ct)
a992ca2a 693 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 694 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
695 + nla_total_size(0) /* CTA_PROTOINFO */
696 + nla_total_size(0) /* CTA_HELP */
697 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 698 + ctnetlink_secctx_size(ct)
4806e975 699#if IS_ENABLED(CONFIG_NF_NAT)
03b64f51
PNA		 700 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
701 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 702#endif
703#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 704 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 705#endif
706#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 707 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
d271e8bd 708#endif
03b64f51 709 + ctnetlink_proto_size(ct)
0ceabd83 710 + ctnetlink_label_size(ct)
03b64f51 711 ;
2732c4e4
HE		 712}
713
e34d5c1a 714static int
478374a3 715ctnetlink_conntrack_event(unsigned int events, const struct nf_ct_event *item)
c1d10adb 716{
308ac914 717 const struct nf_conntrack_zone *zone;
9592a5c0 718 struct net *net;
c1d10adb 719 struct nlmsghdr *nlh;
df6fb868 720 struct nlattr *nest_parms;
19abb7b0 721 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 722 struct sk_buff *skb;
723 unsigned int type;
c1d10adb 724 unsigned int flags = 0, group;
dd7669a9 725 int err;
c1d10adb 726
a0891aa6 727 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 728 type = IPCTNL_MSG_CT_DELETE;
729 group = NFNLGRP_CONNTRACK_DESTROY;
04b80cea 730 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 731 type = IPCTNL_MSG_CT_NEW;
732 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 733 group = NFNLGRP_CONNTRACK_NEW;
04b80cea 734 } else if (events) {
c1d10adb
PNA		 735 type = IPCTNL_MSG_CT_NEW;
736 group = NFNLGRP_CONNTRACK_UPDATE;
737 } else
e34d5c1a 738 return 0;
a2427692 739
9592a5c0
AD		 740 net = nf_ct_net(ct);
741 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 742 return 0;
a2427692 743
03b64f51
PNA		 744 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
745 if (skb == NULL)
150ace0d 746 goto errout;
c1d10adb 747
dedb67c4 748 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type);
19c28b13
PNA		 749 nlh = nfnl_msg_put(skb, item->portid, 0, type, flags, nf_ct_l3num(ct),
750 NFNETLINK_V0, 0);
751 if (!nlh)
96bcf938 752 goto nlmsg_failure;
c1d10adb 753
deedb590
DB		 754 zone = nf_ct_zone(ct);
755
ae0be8de 756 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
df6fb868
PM		 757 if (!nest_parms)
758 goto nla_put_failure;
f2f3e38c 759 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 760 goto nla_put_failure;
deedb590
DB		 761 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
762 NF_CT_ZONE_DIR_ORIG) < 0)
763 goto nla_put_failure;
df6fb868 764 nla_nest_end(skb, nest_parms);
601e68e1 765
ae0be8de 766 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
df6fb868
PM		 767 if (!nest_parms)
768 goto nla_put_failure;
f2f3e38c 769 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 770 goto nla_put_failure;
deedb590
DB		 771 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
772 NF_CT_ZONE_DIR_REPL) < 0)
773 goto nla_put_failure;
df6fb868 774 nla_nest_end(skb, nest_parms);
c1d10adb 775
deedb590
DB		 776 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
777 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 778 goto nla_put_failure;
ef00f89f 779
1eedf699
EL		 780 if (ctnetlink_dump_id(skb, ct) < 0)
781 goto nla_put_failure;
782
e57dce60
FH		 783 if (ctnetlink_dump_status(skb, ct) < 0)
784 goto nla_put_failure;
785
a0891aa6 786 if (events & (1 << IPCT_DESTROY)) {
86d21fc7
FW		 787 if (ctnetlink_dump_timeout(skb, ct, true) < 0)
788 goto nla_put_failure;
789
4542fa47 790 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
86d21fc7
FW		 791 ctnetlink_dump_timestamp(skb, ct) < 0 ||
792 ctnetlink_dump_protoinfo(skb, ct, true) < 0)
df6fb868 793 goto nla_put_failure;
7b621c1e 794 } else {
86d21fc7 795 if (ctnetlink_dump_timeout(skb, ct, false) < 0)
df6fb868 796 goto nla_put_failure;
7b621c1e 797
86d21fc7
FW		 798 if (events & (1 << IPCT_PROTOINFO) &&
799 ctnetlink_dump_protoinfo(skb, ct, false) < 0)
df6fb868 800 goto nla_put_failure;
7b621c1e 801
a0891aa6 802 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 803 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 804 goto nla_put_failure;
7b621c1e 805
ff660c80 806#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 807 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 808 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 809 goto nla_put_failure;
ff660c80 810#endif
0ceabd83
FW		 811 if (events & (1 << IPCT_LABEL) &&
812 ctnetlink_dump_labels(skb, ct) < 0)
813 goto nla_put_failure;
7b621c1e 814
a0891aa6 815 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 816 ctnetlink_dump_master(skb, ct) < 0)
817 goto nla_put_failure;
818
41d73ec0
PM		 819 if (events & (1 << IPCT_SEQADJ) &&
820 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
13eae15a 821 goto nla_put_failure;
20710b3b
PNA		 822
823 if (events & (1 << IPCT_SYNPROXY) &&
824 ctnetlink_dump_ct_synproxy(skb, ct) < 0)
825 goto nla_put_failure;
7b621c1e 826 }
b9a37e0c 827
a83099a6 828#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 829 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 830 && ctnetlink_dump_mark(skb, ct) < 0)
831 goto nla_put_failure;
832#endif
96bcf938 833 nlmsg_end(skb, nlh);
15e47304 834 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 835 GFP_ATOMIC);
dd7669a9
PNA		 836 if (err == -ENOBUFS || err == -EAGAIN)
837 return -ENOBUFS;
838
e34d5c1a 839 return 0;
c1d10adb 840
df6fb868 841nla_put_failure:
96bcf938 842 nlmsg_cancel(skb, nlh);
528a3a6f 843nlmsg_failure:
c1d10adb 844 kfree_skb(skb);
150ace0d 845errout:
37b7ef72
PNA		 846 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
847 return -ENOBUFS;
848
e34d5c1a 849 return 0;
c1d10adb
PNA		 850}
851#endif /* CONFIG_NF_CONNTRACK_EVENTS */
852
853static int ctnetlink_done(struct netlink_callback *cb)
854{
89f2e218
PM		 855 if (cb->args[1])
856 nf_ct_put((struct nf_conn *)cb->args[1]);
397304b5 857 kfree(cb->data);
c1d10adb
PNA		 858 return 0;
859}
860
ff1199db
FW		 861struct ctnetlink_filter_u32 {
862 u32 val;
863 u32 mask;
864};
865
866476f3 866struct ctnetlink_filter {
59c08c69 867 u8 family;
cb8aa9a3
RB		 868
869 u_int32_t orig_flags;
870 u_int32_t reply_flags;
871
872 struct nf_conntrack_tuple orig;
873 struct nf_conntrack_tuple reply;
874 struct nf_conntrack_zone zone;
875
ff1199db 876 struct ctnetlink_filter_u32 mark;
9344988d 877 struct ctnetlink_filter_u32 status;
0f298a28
PNA		 878};
879
cb8aa9a3
RB		 880static const struct nla_policy cta_filter_nla_policy[CTA_FILTER_MAX + 1] = {
881 [CTA_FILTER_ORIG_FLAGS] = { .type = NLA_U32 },
882 [CTA_FILTER_REPLY_FLAGS] = { .type = NLA_U32 },
883};
884
885static int ctnetlink_parse_filter(const struct nlattr *attr,
886 struct ctnetlink_filter *filter)
887{
888 struct nlattr *tb[CTA_FILTER_MAX + 1];
889 int ret = 0;
890
891 ret = nla_parse_nested(tb, CTA_FILTER_MAX, attr, cta_filter_nla_policy,
892 NULL);
893 if (ret)
894 return ret;
895
896 if (tb[CTA_FILTER_ORIG_FLAGS]) {
897 filter->orig_flags = nla_get_u32(tb[CTA_FILTER_ORIG_FLAGS]);
898 if (filter->orig_flags & ~CTA_FILTER_F_ALL)
899 return -EOPNOTSUPP;
900 }
901
902 if (tb[CTA_FILTER_REPLY_FLAGS]) {
903 filter->reply_flags = nla_get_u32(tb[CTA_FILTER_REPLY_FLAGS]);
904 if (filter->reply_flags & ~CTA_FILTER_F_ALL)
905 return -EOPNOTSUPP;
906 }
907
908 return 0;
909}
910
911static int ctnetlink_parse_zone(const struct nlattr *attr,
912 struct nf_conntrack_zone *zone);
913static int ctnetlink_parse_tuple_filter(const struct nlattr * const cda[],
914 struct nf_conntrack_tuple *tuple,
915 u32 type, u_int8_t l3num,
916 struct nf_conntrack_zone *zone,
917 u_int32_t flags);
918
ff1199db
FW		 919static int ctnetlink_filter_parse_mark(struct ctnetlink_filter_u32 *mark,
920 const struct nlattr * const cda[])
921{
922#ifdef CONFIG_NF_CONNTRACK_MARK
923 if (cda[CTA_MARK]) {
924 mark->val = ntohl(nla_get_be32(cda[CTA_MARK]));
925
926 if (cda[CTA_MARK_MASK])
927 mark->mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
928 else
929 mark->mask = 0xffffffff;
930 } else if (cda[CTA_MARK_MASK]) {
931 return -EINVAL;
932 }
933#endif
934 return 0;
935}
936
9344988d
FW		 937static int ctnetlink_filter_parse_status(struct ctnetlink_filter_u32 *status,
938 const struct nlattr * const cda[])
939{
940 if (cda[CTA_STATUS]) {
941 status->val = ntohl(nla_get_be32(cda[CTA_STATUS]));
942 if (cda[CTA_STATUS_MASK])
943 status->mask = ntohl(nla_get_be32(cda[CTA_STATUS_MASK]));
944 else
945 status->mask = status->val;
946
947 /* status->val == 0? always true, else always false. */
948 if (status->mask == 0)
949 return -EINVAL;
950 } else if (cda[CTA_STATUS_MASK]) {
951 return -EINVAL;
952 }
953
954 /* CTA_STATUS is NLA_U32, if this fires UAPI needs to be extended */
955 BUILD_BUG_ON(__IPS_MAX_BIT >= 32);
956 return 0;
957}
958
866476f3 959static struct ctnetlink_filter *
59c08c69 960ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family)
866476f3 961{
866476f3 962 struct ctnetlink_filter *filter;
cb8aa9a3 963 int err;
866476f3 964
9306425b 965#ifndef CONFIG_NF_CONNTRACK_MARK
7c6b4121 966 if (cda[CTA_MARK] || cda[CTA_MARK_MASK])
9306425b
FW		 967 return ERR_PTR(-EOPNOTSUPP);
968#endif
969
866476f3
KE		 970 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
971 if (filter == NULL)
972 return ERR_PTR(-ENOMEM);
973
59c08c69
KE		 974 filter->family = family;
975
ff1199db
FW		 976 err = ctnetlink_filter_parse_mark(&filter->mark, cda);
977 if (err)
6c2d2176 978 goto err_filter;
ff1199db 979
9344988d
FW		 980 err = ctnetlink_filter_parse_status(&filter->status, cda);
981 if (err)
982 goto err_filter;
983
cb8aa9a3
RB		 984 if (!cda[CTA_FILTER])
985 return filter;
986
987 err = ctnetlink_parse_zone(cda[CTA_ZONE], &filter->zone);
988 if (err < 0)
6c2d2176 989 goto err_filter;
cb8aa9a3
RB		 990
991 err = ctnetlink_parse_filter(cda[CTA_FILTER], filter);
992 if (err < 0)
6c2d2176 993 goto err_filter;
cb8aa9a3
RB		 994
995 if (filter->orig_flags) {
6c2d2176
PNA		 996 if (!cda[CTA_TUPLE_ORIG]) {
997 err = -EINVAL;
998 goto err_filter;
999 }
cb8aa9a3
RB		 1000
1001 err = ctnetlink_parse_tuple_filter(cda, &filter->orig,
1002 CTA_TUPLE_ORIG,
1003 filter->family,
1004 &filter->zone,
1005 filter->orig_flags);
1006 if (err < 0)
6c2d2176 1007 goto err_filter;
cb8aa9a3
RB		 1008 }
1009
1010 if (filter->reply_flags) {
6c2d2176
PNA		 1011 if (!cda[CTA_TUPLE_REPLY]) {
1012 err = -EINVAL;
1013 goto err_filter;
1014 }
cb8aa9a3
RB		 1015
1016 err = ctnetlink_parse_tuple_filter(cda, &filter->reply,
1017 CTA_TUPLE_REPLY,
1018 filter->family,
1019 &filter->zone,
ad81d4da 1020 filter->reply_flags);
77522ff0 1021 if (err < 0)
6c2d2176 1022 goto err_filter;
cb8aa9a3
RB		 1023 }
1024
59c08c69 1025 return filter;
6c2d2176
PNA		 1026
1027err_filter:
1028 kfree(filter);
1029
1030 return ERR_PTR(err);
866476f3
KE		 1031}
1032
cb8aa9a3
RB		 1033static bool ctnetlink_needs_filter(u8 family, const struct nlattr * const *cda)
1034{
9344988d 1035 return family || cda[CTA_MARK] || cda[CTA_FILTER] || cda[CTA_STATUS];
cb8aa9a3
RB		 1036}
1037
3e673b23
FW		 1038static int ctnetlink_start(struct netlink_callback *cb)
1039{
1040 const struct nlattr * const *cda = cb->data;
1041 struct ctnetlink_filter *filter = NULL;
59c08c69
KE		 1042 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1043 u8 family = nfmsg->nfgen_family;
3e673b23 1044
cb8aa9a3 1045 if (ctnetlink_needs_filter(family, cda)) {
59c08c69 1046 filter = ctnetlink_alloc_filter(cda, family);
3e673b23
FW		 1047 if (IS_ERR(filter))
1048 return PTR_ERR(filter);
1049 }
1050
1051 cb->data = filter;
1052 return 0;
1053}
1054
cb8aa9a3
RB		 1055static int ctnetlink_filter_match_tuple(struct nf_conntrack_tuple *filter_tuple,
1056 struct nf_conntrack_tuple *ct_tuple,
1057 u_int32_t flags, int family)
1058{
1059 switch (family) {
1060 case NFPROTO_IPV4:
1061 if ((flags & CTA_FILTER_FLAG(CTA_IP_SRC)) &&
1062 filter_tuple->src.u3.ip != ct_tuple->src.u3.ip)
1063 return 0;
1064
1065 if ((flags & CTA_FILTER_FLAG(CTA_IP_DST)) &&
1066 filter_tuple->dst.u3.ip != ct_tuple->dst.u3.ip)
1067 return 0;
1068 break;
1069 case NFPROTO_IPV6:
1070 if ((flags & CTA_FILTER_FLAG(CTA_IP_SRC)) &&
1071 !ipv6_addr_cmp(&filter_tuple->src.u3.in6,
1072 &ct_tuple->src.u3.in6))
1073 return 0;
1074
1075 if ((flags & CTA_FILTER_FLAG(CTA_IP_DST)) &&
1076 !ipv6_addr_cmp(&filter_tuple->dst.u3.in6,
1077 &ct_tuple->dst.u3.in6))
1078 return 0;
1079 break;
1080 }
1081
1082 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)) &&
1083 filter_tuple->dst.protonum != ct_tuple->dst.protonum)
1084 return 0;
1085
1086 switch (ct_tuple->dst.protonum) {
1087 case IPPROTO_TCP:
1088 case IPPROTO_UDP:
1089 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_SRC_PORT)) &&
1090 filter_tuple->src.u.tcp.port != ct_tuple->src.u.tcp.port)
1091 return 0;
1092
1093 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_DST_PORT)) &&
1094 filter_tuple->dst.u.tcp.port != ct_tuple->dst.u.tcp.port)
1095 return 0;
1096 break;
1097 case IPPROTO_ICMP:
1098 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_TYPE)) &&
1099 filter_tuple->dst.u.icmp.type != ct_tuple->dst.u.icmp.type)
1100 return 0;
1101 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_CODE)) &&
1102 filter_tuple->dst.u.icmp.code != ct_tuple->dst.u.icmp.code)
1103 return 0;
1104 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_ID)) &&
1105 filter_tuple->src.u.icmp.id != ct_tuple->src.u.icmp.id)
1106 return 0;
1107 break;
1108 case IPPROTO_ICMPV6:
1109 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_TYPE)) &&
1110 filter_tuple->dst.u.icmp.type != ct_tuple->dst.u.icmp.type)
1111 return 0;
1112 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_CODE)) &&
1113 filter_tuple->dst.u.icmp.code != ct_tuple->dst.u.icmp.code)
1114 return 0;
1115 if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_ID)) &&
1116 filter_tuple->src.u.icmp.id != ct_tuple->src.u.icmp.id)
1117 return 0;
1118 break;
1119 }
1120
1121 return 1;
1122}
1123
866476f3
KE		 1124static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
1125{
1126 struct ctnetlink_filter *filter = data;
cb8aa9a3 1127 struct nf_conntrack_tuple *tuple;
9344988d 1128 u32 status;
866476f3
KE		 1129
1130 if (filter == NULL)
59c08c69
KE		 1131 goto out;
1132
1133 /* Match entries of a given L3 protocol number.
1134 * If it is not specified, ie. l3proto == 0,
1135 * then match everything.
1136 */
1137 if (filter->family && nf_ct_l3num(ct) != filter->family)
1138 goto ignore_entry;
866476f3 1139
cb8aa9a3
RB		 1140 if (filter->orig_flags) {
1141 tuple = nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL);
1142 if (!ctnetlink_filter_match_tuple(&filter->orig, tuple,
1143 filter->orig_flags,
1144 filter->family))
1145 goto ignore_entry;
1146 }
1147
1148 if (filter->reply_flags) {
1149 tuple = nf_ct_tuple(ct, IP_CT_DIR_REPLY);
1150 if (!ctnetlink_filter_match_tuple(&filter->reply, tuple,
1151 filter->reply_flags,
1152 filter->family))
1153 goto ignore_entry;
1154 }
1155
866476f3 1156#ifdef CONFIG_NF_CONNTRACK_MARK
6c0d95d1 1157 if ((ct->mark & filter->mark.mask) != filter->mark.val)
59c08c69 1158 goto ignore_entry;
866476f3 1159#endif
9344988d
FW		 1160 status = (u32)READ_ONCE(ct->status);
1161 if ((status & filter->status.mask) != filter->status.val)
1162 goto ignore_entry;
866476f3 1163
59c08c69
KE		 1164out:
1165 return 1;
1166
1167ignore_entry:
866476f3
KE		 1168 return 0;
1169}
1170
c1d10adb
PNA		 1171static int
1172ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
1173{
cb8aa9a3 1174 unsigned int flags = cb->data ? NLM_F_DUMP_FILTERED : 0;
9592a5c0 1175 struct net *net = sock_net(skb->sk);
89f2e218 1176 struct nf_conn *ct, *last;
c1d10adb 1177 struct nf_conntrack_tuple_hash *h;
ea781f19 1178 struct hlist_nulls_node *n;
2344d64e
FW		 1179 struct nf_conn *nf_ct_evict[8];
1180 int res, i;
93bb0ceb
JDB		 1181 spinlock_t *lockp;
1182
d205dc40 1183 last = (struct nf_conn *)cb->args[1];
2344d64e 1184 i = 0;
93bb0ceb
JDB		 1185
1186 local_bh_disable();
56d52d48 1187 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
89f2e218 1188restart:
2344d64e
FW		 1189 while (i) {
1190 i--;
1191 if (nf_ct_should_gc(nf_ct_evict[i]))
1192 nf_ct_kill(nf_ct_evict[i]);
1193 nf_ct_put(nf_ct_evict[i]);
1194 }
1195
93bb0ceb 1196 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
b16c2919 1197 nf_conntrack_lock(lockp);
56d52d48 1198 if (cb->args[0] >= nf_conntrack_htable_size) {
93bb0ceb
JDB		 1199 spin_unlock(lockp);
1200 goto out;
1201 }
56d52d48
FW		 1202 hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
1203 hnnode) {
c1d10adb 1204 ct = nf_ct_tuplehash_to_ctrack(h);
2344d64e 1205 if (nf_ct_is_expired(ct)) {
0ed8f619 1206 /* need to defer nf_ct_kill() until lock is released */
2344d64e 1207 if (i < ARRAY_SIZE(nf_ct_evict) &&
71977437 1208 refcount_inc_not_zero(&ct->ct_general.use))
2344d64e
FW		 1209 nf_ct_evict[i++] = ct;
1210 continue;
1211 }
1212
e0c7d472
FW		 1213 if (!net_eq(net, nf_ct_net(ct)))
1214 continue;
1215
76f12e63
FW		 1216 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
1217 continue;
1218
d205dc40
PM		 1219 if (cb->args[1]) {
1220 if (ct != last)
13ee6ac5 1221 continue;
d205dc40 1222 cb->args[1] = 0;
89f2e218 1223 }
866476f3 1224 if (!ctnetlink_filter_match(ct, cb->data))
0f298a28 1225 continue;
866476f3 1226
3b988ece 1227 res =
15e47304 1228 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 1229 cb->nlh->nlmsg_seq,
1230 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
cb8aa9a3 1231 ct, true, flags);
3b988ece 1232 if (res < 0) {
c71caf41 1233 nf_conntrack_get(&ct->ct_general);
89f2e218 1234 cb->args[1] = (unsigned long)ct;
93bb0ceb 1235 spin_unlock(lockp);
c1d10adb 1236 goto out;
89f2e218
PM		 1237 }
1238 }
93bb0ceb 1239 spin_unlock(lockp);
d205dc40 1240 if (cb->args[1]) {
89f2e218
PM		 1241 cb->args[1] = 0;
1242 goto restart;
c1d10adb
PNA		 1243 }
1244 }
89f2e218 1245out:
93bb0ceb 1246 local_bh_enable();
fefa9267
LZ		 1247 if (last) {
1248 /* nf ct hash resize happened, now clear the leftover. */
1249 if ((struct nf_conn *)cb->args[1] == last)
1250 cb->args[1] = 0;
1251
d205dc40 1252 nf_ct_put(last);
fefa9267 1253 }
c1d10adb 1254
2344d64e
FW		 1255 while (i) {
1256 i--;
1257 if (nf_ct_should_gc(nf_ct_evict[i]))
1258 nf_ct_kill(nf_ct_evict[i]);
1259 nf_ct_put(nf_ct_evict[i]);
1260 }
1261
c1d10adb
PNA		 1262 return skb->len;
1263}
1264
f957be9d 1265static int ipv4_nlattr_to_tuple(struct nlattr *tb[],
cb8aa9a3
RB		 1266 struct nf_conntrack_tuple *t,
1267 u_int32_t flags)
f957be9d 1268{
cb8aa9a3
RB		 1269 if (flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
1270 if (!tb[CTA_IP_V4_SRC])
1271 return -EINVAL;
1272
1273 t->src.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_SRC]);
1274 }
f957be9d 1275
cb8aa9a3
RB		 1276 if (flags & CTA_FILTER_FLAG(CTA_IP_DST)) {
1277 if (!tb[CTA_IP_V4_DST])
1278 return -EINVAL;
1279
1280 t->dst.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_DST]);
1281 }
f957be9d
FW		 1282
1283 return 0;
1284}
1285
1286static int ipv6_nlattr_to_tuple(struct nlattr *tb[],
cb8aa9a3
RB		 1287 struct nf_conntrack_tuple *t,
1288 u_int32_t flags)
f957be9d 1289{
cb8aa9a3
RB		 1290 if (flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
1291 if (!tb[CTA_IP_V6_SRC])
1292 return -EINVAL;
1293
1294 t->src.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_SRC]);
1295 }
f957be9d 1296
cb8aa9a3
RB		 1297 if (flags & CTA_FILTER_FLAG(CTA_IP_DST)) {
1298 if (!tb[CTA_IP_V6_DST])
1299 return -EINVAL;
1300
1301 t->dst.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_DST]);
1302 }
f957be9d
FW		 1303
1304 return 0;
1305}
1306
4054ff45 1307static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
cb8aa9a3
RB		 1308 struct nf_conntrack_tuple *tuple,
1309 u_int32_t flags)
c1d10adb 1310{
df6fb868 1311 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 1312 int ret = 0;
1313
8cb08174 1314 ret = nla_parse_nested_deprecated(tb, CTA_IP_MAX, attr, NULL, NULL);
130ffbc2
DB		 1315 if (ret < 0)
1316 return ret;
c1d10adb 1317
8cb08174
JB		 1318 ret = nla_validate_nested_deprecated(attr, CTA_IP_MAX,
1319 cta_ip_nla_policy, NULL);
f957be9d
FW		 1320 if (ret)
1321 return ret;
c1d10adb 1322
f957be9d
FW		 1323 switch (tuple->src.l3num) {
1324 case NFPROTO_IPV4:
cb8aa9a3 1325 ret = ipv4_nlattr_to_tuple(tb, tuple, flags);
f957be9d
FW		 1326 break;
1327 case NFPROTO_IPV6:
cb8aa9a3 1328 ret = ipv6_nlattr_to_tuple(tb, tuple, flags);
f957be9d 1329 break;
f73e924c 1330 }
c1d10adb 1331
c1d10adb
PNA		 1332 return ret;
1333}
1334
f73e924c
PM		 1335static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
1336 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 1337};
1338
4054ff45 1339static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
cb8aa9a3
RB		 1340 struct nf_conntrack_tuple *tuple,
1341 u_int32_t flags)
c1d10adb 1342{
b3480fe0 1343 const struct nf_conntrack_l4proto *l4proto;
df6fb868 1344 struct nlattr *tb[CTA_PROTO_MAX+1];
c1d10adb
PNA		 1345 int ret = 0;
1346
8cb08174
JB		 1347 ret = nla_parse_nested_deprecated(tb, CTA_PROTO_MAX, attr,
1348 proto_nla_policy, NULL);
f73e924c
PM		 1349 if (ret < 0)
1350 return ret;
c1d10adb 1351
cb8aa9a3
RB		 1352 if (!(flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)))
1353 return 0;
1354
df6fb868 1355 if (!tb[CTA_PROTO_NUM])
c1d10adb 1356 return -EINVAL;
cb8aa9a3 1357
77236b6e 1358 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 1359
cd91566e 1360 rcu_read_lock();
4a60dc74 1361 l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
c1d10adb 1362
f73e924c 1363 if (likely(l4proto->nlattr_to_tuple)) {
8cb08174
JB		 1364 ret = nla_validate_nested_deprecated(attr, CTA_PROTO_MAX,
1365 l4proto->nla_policy,
1366 NULL);
f73e924c 1367 if (ret == 0)
cb8aa9a3 1368 ret = l4proto->nlattr_to_tuple(tb, tuple, flags);
f73e924c 1369 }
c1d10adb 1370
cd91566e 1371 rcu_read_unlock();
601e68e1 1372
c1d10adb
PNA		 1373 return ret;
1374}
1375
deedb590
DB		 1376static int
1377ctnetlink_parse_zone(const struct nlattr *attr,
1378 struct nf_conntrack_zone *zone)
1379{
5e8018fc
DB		 1380 nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
1381 NF_CT_DEFAULT_ZONE_DIR, 0);
deedb590
DB		 1382#ifdef CONFIG_NF_CONNTRACK_ZONES
1383 if (attr)
1384 zone->id = ntohs(nla_get_be16(attr));
1385#else
1386 if (attr)
1387 return -EOPNOTSUPP;
1388#endif
1389 return 0;
1390}
1391
1392static int
1393ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
1394 struct nf_conntrack_zone *zone)
1395{
1396 int ret;
1397
1398 if (zone->id != NF_CT_DEFAULT_ZONE_ID)
1399 return -EINVAL;
1400
1401 ret = ctnetlink_parse_zone(attr, zone);
1402 if (ret < 0)
1403 return ret;
1404
1405 if (type == CTA_TUPLE_REPLY)
1406 zone->dir = NF_CT_ZONE_DIR_REPL;
1407 else
1408 zone->dir = NF_CT_ZONE_DIR_ORIG;
1409
1410 return 0;
1411}
1412
d0b0268f
PM		 1413static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
1414 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
1415 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
deedb590 1416 [CTA_TUPLE_ZONE] = { .type = NLA_U16 },
d0b0268f
PM		 1417};
1418
cb8aa9a3
RB		 1419#define CTA_FILTER_F_ALL_CTA_PROTO \
1420 (CTA_FILTER_F_CTA_PROTO_SRC_PORT | \
1421 CTA_FILTER_F_CTA_PROTO_DST_PORT | \
1422 CTA_FILTER_F_CTA_PROTO_ICMP_TYPE | \
1423 CTA_FILTER_F_CTA_PROTO_ICMP_CODE | \
1424 CTA_FILTER_F_CTA_PROTO_ICMP_ID | \
1425 CTA_FILTER_F_CTA_PROTO_ICMPV6_TYPE | \
1426 CTA_FILTER_F_CTA_PROTO_ICMPV6_CODE | \
1427 CTA_FILTER_F_CTA_PROTO_ICMPV6_ID)
1428
bb5cf80e 1429static int
cb8aa9a3
RB		 1430ctnetlink_parse_tuple_filter(const struct nlattr * const cda[],
1431 struct nf_conntrack_tuple *tuple, u32 type,
1432 u_int8_t l3num, struct nf_conntrack_zone *zone,
1433 u_int32_t flags)
c1d10adb 1434{
df6fb868 1435 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 1436 int err;
1437
c1d10adb
PNA		 1438 memset(tuple, 0, sizeof(*tuple));
1439
8cb08174
JB		 1440 err = nla_parse_nested_deprecated(tb, CTA_TUPLE_MAX, cda[type],
1441 tuple_nla_policy, NULL);
130ffbc2
DB		 1442 if (err < 0)
1443 return err;
c1d10adb 1444
1cc5ef91
WM		 1445 if (l3num != NFPROTO_IPV4 && l3num != NFPROTO_IPV6)
1446 return -EOPNOTSUPP;
c1d10adb
PNA		 1447 tuple->src.l3num = l3num;
1448
cb8aa9a3
RB		 1449 if (flags & CTA_FILTER_FLAG(CTA_IP_DST) ||
1450 flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
1451 if (!tb[CTA_TUPLE_IP])
1452 return -EINVAL;
c1d10adb 1453
cb8aa9a3
RB		 1454 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple, flags);
1455 if (err < 0)
1456 return err;
1457 }
c1d10adb 1458
cb8aa9a3
RB		 1459 if (flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)) {
1460 if (!tb[CTA_TUPLE_PROTO])
1461 return -EINVAL;
c1d10adb 1462
cb8aa9a3
RB		 1463 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple, flags);
1464 if (err < 0)
1465 return err;
1466 } else if (flags & CTA_FILTER_FLAG(ALL_CTA_PROTO)) {
1467 /* Can't manage proto flags without a protonum */
1468 return -EINVAL;
1469 }
1470
1471 if ((flags & CTA_FILTER_FLAG(CTA_TUPLE_ZONE)) && tb[CTA_TUPLE_ZONE]) {
deedb590
DB		 1472 if (!zone)
1473 return -EINVAL;
1474
1475 err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
1476 type, zone);
1477 if (err < 0)
1478 return err;
1479 }
1480
c1d10adb
PNA		 1481 /* orig and expect tuples get DIR_ORIGINAL */
1482 if (type == CTA_TUPLE_REPLY)
1483 tuple->dst.dir = IP_CT_DIR_REPLY;
1484 else
1485 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
1486
c1d10adb
PNA		 1487 return 0;
1488}
1489
cb8aa9a3
RB		 1490static int
1491ctnetlink_parse_tuple(const struct nlattr * const cda[],
1492 struct nf_conntrack_tuple *tuple, u32 type,
1493 u_int8_t l3num, struct nf_conntrack_zone *zone)
1494{
1495 return ctnetlink_parse_tuple_filter(cda, tuple, type, l3num, zone,
1496 CTA_FILTER_FLAG(ALL));
1497}
1498
d0b0268f 1499static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 1500 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
1501 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 1502};
1503
4054ff45
PNA		 1504static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
1505 struct nlattr **helpinfo)
c1d10adb 1506{
130ffbc2 1507 int err;
df6fb868 1508 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 1509
8cb08174
JB		 1510 err = nla_parse_nested_deprecated(tb, CTA_HELP_MAX, attr,
1511 help_nla_policy, NULL);
130ffbc2
DB		 1512 if (err < 0)
1513 return err;
c1d10adb 1514
df6fb868 1515 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 1516 return -EINVAL;
1517
df6fb868 1518 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 1519
ae243bee
PNA		 1520 if (tb[CTA_HELP_INFO])
1521 *helpinfo = tb[CTA_HELP_INFO];
1522
c1d10adb
PNA		 1523 return 0;
1524}
1525
f73e924c 1526static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 1527 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
1528 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 1529 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 1530 [CTA_PROTOINFO] = { .type = NLA_NESTED },
1531 [CTA_HELP] = { .type = NLA_NESTED },
1532 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 1533 [CTA_TIMEOUT] = { .type = NLA_U32 },
1534 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 1535 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 1536 [CTA_NAT_DST] = { .type = NLA_NESTED },
1537 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 1538 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
1539 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 1540 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 1541 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9 1542 [CTA_LABELS] = { .type = NLA_BINARY,
d2bf2f34 1543 .len = NF_CT_LABELS_MAX_SIZE },
9b21f6a9 1544 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
d2bf2f34 1545 .len = NF_CT_LABELS_MAX_SIZE },
cb8aa9a3 1546 [CTA_FILTER] = { .type = NLA_NESTED },
9344988d 1547 [CTA_STATUS_MASK] = { .type = NLA_U32 },
c1d10adb
PNA		 1548};
1549
90964016
PNA		 1550static int ctnetlink_flush_iterate(struct nf_conn *ct, void *data)
1551{
1552 if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
1553 return 0;
1554
1555 return ctnetlink_filter_match(ct, data);
1556}
1557
866476f3
KE		 1558static int ctnetlink_flush_conntrack(struct net *net,
1559 const struct nlattr * const cda[],
59c08c69 1560 u32 portid, int report, u8 family)
866476f3
KE		 1561{
1562 struct ctnetlink_filter *filter = NULL;
8169ff58
PNA		 1563 struct nf_ct_iter_data iter = {
1564 .net = net,
1565 .portid = portid,
1566 .report = report,
1567 };
866476f3 1568
cb8aa9a3
RB		 1569 if (ctnetlink_needs_filter(family, cda)) {
1570 if (cda[CTA_FILTER])
1571 return -EOPNOTSUPP;
1572
59c08c69 1573 filter = ctnetlink_alloc_filter(cda, family);
866476f3
KE		 1574 if (IS_ERR(filter))
1575 return PTR_ERR(filter);
8169ff58
PNA		 1576
1577 iter.data = filter;
866476f3
KE		 1578 }
1579
8169ff58 1580 nf_ct_iterate_cleanup_net(ctnetlink_flush_iterate, &iter);
866476f3
KE		 1581 kfree(filter);
1582
1583 return 0;
1584}
1585
a6555365
PNA		 1586static int ctnetlink_del_conntrack(struct sk_buff *skb,
1587 const struct nfnl_info *info,
1588 const struct nlattr * const cda[])
c1d10adb 1589{
ef4b65e5 1590 u8 family = info->nfmsg->nfgen_family;
c1d10adb
PNA		 1591 struct nf_conntrack_tuple_hash *h;
1592 struct nf_conntrack_tuple tuple;
308ac914 1593 struct nf_conntrack_zone zone;
a6555365 1594 struct nf_conn *ct;
ef00f89f
PM		 1595 int err;
1596
1597 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1598 if (err < 0)
1599 return err;
c1d10adb 1600
df6fb868 1601 if (cda[CTA_TUPLE_ORIG])
deedb590 1602 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
ef4b65e5 1603 family, &zone);
df6fb868 1604 else if (cda[CTA_TUPLE_REPLY])
deedb590 1605 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
ef4b65e5 1606 family, &zone);
c1d10adb 1607 else {
ef4b65e5 1608 u_int8_t u3 = info->nfmsg->version ? family : AF_UNSPEC;
e7600865 1609
a6555365 1610 return ctnetlink_flush_conntrack(info->net, cda,
866476f3 1611 NETLINK_CB(skb).portid,
a6555365 1612 nlmsg_report(info->nlh), u3);
c1d10adb
PNA		 1613 }
1614
1615 if (err < 0)
1616 return err;
1617
a6555365 1618 h = nf_conntrack_find_get(info->net, &zone, &tuple);
9ea8cfd6 1619 if (!h)
c1d10adb 1620 return -ENOENT;
c1d10adb
PNA		 1621
1622 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1623
90964016
PNA		 1624 if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) {
1625 nf_ct_put(ct);
1626 return -EBUSY;
1627 }
1628
df6fb868 1629 if (cda[CTA_ID]) {
3c791076
FW		 1630 __be32 id = nla_get_be32(cda[CTA_ID]);
1631
1632 if (id != (__force __be32)nf_ct_get_id(ct)) {
c1d10adb
PNA		 1633 nf_ct_put(ct);
1634 return -ENOENT;
1635 }
601e68e1 1636 }
c1d10adb 1637
a6555365 1638 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(info->nlh));
c1d10adb 1639 nf_ct_put(ct);
c1d10adb
PNA		 1640
1641 return 0;
1642}
1643
a6555365
PNA		 1644static int ctnetlink_get_conntrack(struct sk_buff *skb,
1645 const struct nfnl_info *info,
1646 const struct nlattr * const cda[])
c1d10adb 1647{
ef4b65e5 1648 u_int8_t u3 = info->nfmsg->nfgen_family;
c1d10adb
PNA		 1649 struct nf_conntrack_tuple_hash *h;
1650 struct nf_conntrack_tuple tuple;
308ac914 1651 struct nf_conntrack_zone zone;
a6555365
PNA		 1652 struct sk_buff *skb2;
1653 struct nf_conn *ct;
ef00f89f 1654 int err;
c1d10adb 1655
a6555365 1656 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
80d326fa 1657 struct netlink_dump_control c = {
3e673b23 1658 .start = ctnetlink_start,
80d326fa
PNA		 1659 .dump = ctnetlink_dump_table,
1660 .done = ctnetlink_done,
3e673b23 1661 .data = (void *)cda,
80d326fa 1662 };
866476f3 1663
a6555365 1664 return netlink_dump_start(info->sk, skb, info->nlh, &c);
80d326fa 1665 }
c1d10adb 1666
ef00f89f
PM		 1667 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1668 if (err < 0)
1669 return err;
1670
df6fb868 1671 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1672 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1673 u3, &zone);
df6fb868 1674 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1675 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1676 u3, &zone);
c1d10adb
PNA		 1677 else
1678 return -EINVAL;
1679
1680 if (err < 0)
1681 return err;
1682
a6555365 1683 h = nf_conntrack_find_get(info->net, &zone, &tuple);
9ea8cfd6 1684 if (!h)
c1d10adb 1685 return -ENOENT;
9ea8cfd6 1686
c1d10adb
PNA		 1687 ct = nf_ct_tuplehash_to_ctrack(h);
1688
96bcf938 1689 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
e0241ae6 1690 if (!skb2) {
c1d10adb
PNA		 1691 nf_ct_put(ct);
1692 return -ENOMEM;
1693 }
c1d10adb 1694
a6555365
PNA		 1695 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid,
1696 info->nlh->nlmsg_seq,
1697 NFNL_MSG_TYPE(info->nlh->nlmsg_type), ct,
1698 true, 0);
c1d10adb 1699 nf_ct_put(ct);
e0241ae6
PNA		 1700 if (err <= 0) {
1701 kfree_skb(skb2);
1702 return -ENOMEM;
1703 }
c1d10adb 1704
e0241ae6 1705 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
c1d10adb
PNA		 1706}
1707
d871befe
PNA		 1708static int ctnetlink_done_list(struct netlink_callback *cb)
1709{
5948ed29
FW		 1710 struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
1711
1712 if (ctx->last)
1713 nf_ct_put(ctx->last);
1714
d871befe
PNA		 1715 return 0;
1716}
1717
58a94a62 1718#ifdef CONFIG_NF_CONNTRACK_EVENTS
49001a2e
FW		 1719static int ctnetlink_dump_one_entry(struct sk_buff *skb,
1720 struct netlink_callback *cb,
1721 struct nf_conn *ct,
1722 bool dying)
1723{
1724 struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
1725 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1726 u8 l3proto = nfmsg->nfgen_family;
1727 int res;
1728
1729 if (l3proto && nf_ct_l3num(ct) != l3proto)
1730 return 0;
1731
1732 if (ctx->last) {
1733 if (ct != ctx->last)
1734 return 0;
1735
1736 ctx->last = NULL;
1737 }
1738
1739 /* We can't dump extension info for the unconfirmed
1740 * list because unconfirmed conntracks can have
1741 * ct->ext reallocated (and thus freed).
1742 *
1743 * In the dying list case ct->ext can't be free'd
1744 * until after we drop pcpu->lock.
1745 */
1746 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1747 cb->nlh->nlmsg_seq,
1748 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1749 ct, dying, 0);
1750 if (res < 0) {
1751 if (!refcount_inc_not_zero(&ct->ct_general.use))
1752 return 0;
1753
1754 ctx->last = ct;
1755 }
1756
1757 return res;
1758}
58a94a62 1759#endif
49001a2e 1760
d871befe 1761static int
1397af5b 1762ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
d871befe 1763{
8a75a2c1 1764 return 0;
d871befe
PNA		 1765}
1766
1767static int
1768ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1769{
0d3cc504
FW		 1770 struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
1771 struct nf_conn *last = ctx->last;
1772#ifdef CONFIG_NF_CONNTRACK_EVENTS
1773 const struct net *net = sock_net(skb->sk);
1774 struct nf_conntrack_net_ecache *ecache_net;
1775 struct nf_conntrack_tuple_hash *h;
1776 struct hlist_nulls_node *n;
1777#endif
1778
1397af5b
FW		 1779 if (ctx->done)
1780 return 0;
0d3cc504
FW		 1781
1782 ctx->last = NULL;
1783
1784#ifdef CONFIG_NF_CONNTRACK_EVENTS
1785 ecache_net = nf_conn_pernet_ecache(net);
1786 spin_lock_bh(&ecache_net->dying_lock);
1787
1788 hlist_nulls_for_each_entry(h, n, &ecache_net->dying_list, hnnode) {
1789 struct nf_conn *ct;
1790 int res;
1791
1792 ct = nf_ct_tuplehash_to_ctrack(h);
1793 if (last && last != ct)
1794 continue;
1795
1796 res = ctnetlink_dump_one_entry(skb, cb, ct, true);
1797 if (res < 0) {
1798 spin_unlock_bh(&ecache_net->dying_lock);
1799 nf_ct_put(last);
1800 return skb->len;
1801 }
1802
1803 nf_ct_put(last);
1804 last = NULL;
1805 }
1806
1807 spin_unlock_bh(&ecache_net->dying_lock);
1808#endif
1397af5b 1809 ctx->done = true;
0d3cc504 1810 nf_ct_put(last);
0d3cc504 1811
1397af5b 1812 return skb->len;
d871befe
PNA		 1813}
1814
a6555365
PNA		 1815static int ctnetlink_get_ct_dying(struct sk_buff *skb,
1816 const struct nfnl_info *info,
1817 const struct nlattr * const cda[])
d871befe 1818{
a6555365 1819 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
d871befe
PNA		 1820 struct netlink_dump_control c = {
1821 .dump = ctnetlink_dump_dying,
1822 .done = ctnetlink_done_list,
1823 };
a6555365 1824 return netlink_dump_start(info->sk, skb, info->nlh, &c);
d871befe
PNA		 1825 }
1826
1827 return -EOPNOTSUPP;
1828}
1829
a6555365
PNA		 1830static int ctnetlink_get_ct_unconfirmed(struct sk_buff *skb,
1831 const struct nfnl_info *info,
1832 const struct nlattr * const cda[])
d871befe 1833{
a6555365 1834 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
d871befe
PNA		 1835 struct netlink_dump_control c = {
1836 .dump = ctnetlink_dump_unconfirmed,
1837 .done = ctnetlink_done_list,
1838 };
a6555365 1839 return netlink_dump_start(info->sk, skb, info->nlh, &c);
d871befe
PNA		 1840 }
1841
1842 return -EOPNOTSUPP;
1843}
1844
4806e975 1845#if IS_ENABLED(CONFIG_NF_NAT)
e6a7d3c0
PNA		 1846static int
1847ctnetlink_parse_nat_setup(struct nf_conn *ct,
1848 enum nf_nat_manip_type manip,
39938324 1849 const struct nlattr *attr)
19f8f717 1850 __must_hold(RCU)
e6a7d3c0 1851{
285c8a7a 1852 const struct nf_nat_hook *nat_hook;
c7232c99 1853 int err;
e6a7d3c0 1854
2c205dd3
PNA		 1855 nat_hook = rcu_dereference(nf_nat_hook);
1856 if (!nat_hook) {
95a5afca 1857#ifdef CONFIG_MODULES
e6a7d3c0 1858 rcu_read_unlock();
c14b78e7 1859 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1860 if (request_module("nf-nat") < 0) {
c14b78e7 1861 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1862 rcu_read_lock();
1863 return -EOPNOTSUPP;
1864 }
c14b78e7 1865 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0 1866 rcu_read_lock();
c05a45c0
FW		 1867 nat_hook = rcu_dereference(nf_nat_hook);
1868 if (nat_hook)
e6a7d3c0
PNA		 1869 return -EAGAIN;
1870#endif
1871 return -EOPNOTSUPP;
1872 }
1873
2c205dd3 1874 err = nat_hook->parse_nat_setup(ct, manip, attr);
c7232c99
PM		 1875 if (err == -EAGAIN) {
1876#ifdef CONFIG_MODULES
1877 rcu_read_unlock();
c14b78e7 1878 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1879 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1880 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1881 rcu_read_lock();
1882 return -EOPNOTSUPP;
1883 }
c14b78e7 1884 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1885 rcu_read_lock();
1886#else
1887 err = -EOPNOTSUPP;
1888#endif
1889 }
1890 return err;
e6a7d3c0 1891}
67671841 1892#endif
e6a7d3c0 1893
bb5cf80e 1894static int
39938324 1895ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1896{
ef69aa3a 1897 return nf_ct_change_status_common(ct, ntohl(nla_get_be32(cda[CTA_STATUS])));
c1d10adb
PNA		 1898}
1899
e6a7d3c0 1900static int
0eba801b 1901ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0 1902{
4806e975 1903#if IS_ENABLED(CONFIG_NF_NAT)
e6a7d3c0
PNA		 1904 int ret;
1905
fe337ac2
FW		 1906 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1907 return 0;
1908
0eba801b
PNA		 1909 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1910 cda[CTA_NAT_DST]);
1911 if (ret < 0)
1912 return ret;
1913
c47d36b3
AS		 1914 return ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1915 cda[CTA_NAT_SRC]);
e6a7d3c0 1916#else
0eba801b
PNA		 1917 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1918 return 0;
e6a7d3c0
PNA		 1919 return -EOPNOTSUPP;
1920#endif
1921}
c1d10adb 1922
4054ff45
PNA		 1923static int ctnetlink_change_helper(struct nf_conn *ct,
1924 const struct nlattr * const cda[])
c1d10adb
PNA		 1925{
1926 struct nf_conntrack_helper *helper;
dc808fe2 1927 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1928 char *helpname = NULL;
ae243bee 1929 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1930 int err;
1931
ae243bee 1932 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1933 if (err < 0)
1934 return err;
1935
f95d7a46
KC		 1936 /* don't change helper of sibling connections */
1937 if (ct->master) {
1938 /* If we try to change the helper to the same thing twice,
1939 * treat the second attempt as a no-op instead of returning
1940 * an error.
1941 */
3173d5b8
LZ		 1942 err = -EBUSY;
1943 if (help) {
1944 rcu_read_lock();
1945 helper = rcu_dereference(help->helper);
1946 if (helper && !strcmp(helper->name, helpname))
1947 err = 0;
1948 rcu_read_unlock();
1949 }
1950
1951 return err;
f95d7a46
KC		 1952 }
1953
df293bbb
YK		 1954 if (!strcmp(helpname, "")) {
1955 if (help && help->helper) {
c1d10adb
PNA		 1956 /* we had a helper before ... */
1957 nf_ct_remove_expectations(ct);
a9b3cd7f 1958 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1959 }
df293bbb
YK		 1960
1961 return 0;
c1d10adb 1962 }
601e68e1 1963
88be4c09 1964 rcu_read_lock();
794e6871
PM		 1965 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1966 nf_ct_protonum(ct));
226c0c0e 1967 if (helper == NULL) {
88be4c09 1968 rcu_read_unlock();
0adf9d67 1969 return -EOPNOTSUPP;
226c0c0e 1970 }
df293bbb 1971
ceceae1b 1972 if (help) {
e14575fa 1973 if (rcu_access_pointer(help->helper) == helper) {
ae243bee 1974 /* update private helper data if allowed. */
7be54ca4 1975 if (helper->from_nlattr)
ae243bee 1976 helper->from_nlattr(helpinfo, ct);
88be4c09 1977 err = 0;
fd7462de 1978 } else
88be4c09
LZ		 1979 err = -EBUSY;
1980 } else {
1981 /* we cannot set a helper for an existing conntrack */
1982 err = -EOPNOTSUPP;
ceceae1b 1983 }
df293bbb 1984
88be4c09
LZ		 1985 rcu_read_unlock();
1986 return err;
c1d10adb
PNA		 1987}
1988
4054ff45
PNA		 1989static int ctnetlink_change_timeout(struct nf_conn *ct,
1990 const struct nlattr * const cda[])
c1d10adb 1991{
0b389236 1992 return __nf_ct_change_timeout(ct, (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ);
c1d10adb
PNA		 1993}
1994
58fc419b
AJ		 1995#if defined(CONFIG_NF_CONNTRACK_MARK)
1996static void ctnetlink_change_mark(struct nf_conn *ct,
1997 const struct nlattr * const cda[])
1998{
1999 u32 mark, newmark, mask = 0;
2000
2001 if (cda[CTA_MARK_MASK])
2002 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2003
2004 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2005 newmark = (ct->mark & mask) ^ mark;
2006 if (newmark != ct->mark)
2007 ct->mark = newmark;
2008}
2009#endif
2010
d0b0268f
PM		 2011static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
2012 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
2013 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
2014 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
2015};
2016
4054ff45
PNA		 2017static int ctnetlink_change_protoinfo(struct nf_conn *ct,
2018 const struct nlattr * const cda[])
c1d10adb 2019{
39938324 2020 const struct nlattr *attr = cda[CTA_PROTOINFO];
b3480fe0 2021 const struct nf_conntrack_l4proto *l4proto;
39938324 2022 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
c1d10adb
PNA		 2023 int err = 0;
2024
8cb08174
JB		 2025 err = nla_parse_nested_deprecated(tb, CTA_PROTOINFO_MAX, attr,
2026 protoinfo_policy, NULL);
130ffbc2
DB		 2027 if (err < 0)
2028 return err;
c1d10adb 2029
4a60dc74 2030 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
fdf70832
PM		 2031 if (l4proto->from_nlattr)
2032 err = l4proto->from_nlattr(tb, ct);
c1d10adb
PNA		 2033
2034 return err;
2035}
2036
41d73ec0
PM		 2037static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = {
2038 [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 },
2039 [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 },
2040 [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 },
d0b0268f
PM		 2041};
2042
4054ff45
PNA		 2043static int change_seq_adj(struct nf_ct_seqadj *seq,
2044 const struct nlattr * const attr)
13eae15a 2045{
130ffbc2 2046 int err;
41d73ec0 2047 struct nlattr *cda[CTA_SEQADJ_MAX+1];
13eae15a 2048
8cb08174
JB		 2049 err = nla_parse_nested_deprecated(cda, CTA_SEQADJ_MAX, attr,
2050 seqadj_policy, NULL);
130ffbc2
DB		 2051 if (err < 0)
2052 return err;
13eae15a 2053
41d73ec0 2054 if (!cda[CTA_SEQADJ_CORRECTION_POS])
13eae15a
PNA		 2055 return -EINVAL;
2056
41d73ec0
PM		 2057 seq->correction_pos =
2058 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
13eae15a 2059
41d73ec0 2060 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
13eae15a
PNA		 2061 return -EINVAL;
2062
41d73ec0
PM		 2063 seq->offset_before =
2064 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
13eae15a 2065
41d73ec0 2066 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
13eae15a
PNA		 2067 return -EINVAL;
2068
41d73ec0
PM		 2069 seq->offset_after =
2070 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
13eae15a
PNA		 2071
2072 return 0;
2073}
2074
2075static int
41d73ec0
PM		 2076ctnetlink_change_seq_adj(struct nf_conn *ct,
2077 const struct nlattr * const cda[])
13eae15a 2078{
41d73ec0 2079 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
13eae15a 2080 int ret = 0;
13eae15a 2081
41d73ec0 2082 if (!seqadj)
13eae15a
PNA		 2083 return 0;
2084
64f3967c 2085 spin_lock_bh(&ct->lock);
41d73ec0
PM		 2086 if (cda[CTA_SEQ_ADJ_ORIG]) {
2087 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
2088 cda[CTA_SEQ_ADJ_ORIG]);
13eae15a 2089 if (ret < 0)
64f3967c 2090 goto err;
13eae15a 2091
53b56da8 2092 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 2093 }
2094
41d73ec0
PM		 2095 if (cda[CTA_SEQ_ADJ_REPLY]) {
2096 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
2097 cda[CTA_SEQ_ADJ_REPLY]);
13eae15a 2098 if (ret < 0)
64f3967c 2099 goto err;
13eae15a 2100
53b56da8 2101 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 2102 }
2103
64f3967c 2104 spin_unlock_bh(&ct->lock);
13eae15a 2105 return 0;
64f3967c
LZ		 2106err:
2107 spin_unlock_bh(&ct->lock);
2108 return ret;
13eae15a 2109}
13eae15a 2110
20710b3b
PNA		 2111static const struct nla_policy synproxy_policy[CTA_SYNPROXY_MAX + 1] = {
2112 [CTA_SYNPROXY_ISN] = { .type = NLA_U32 },
2113 [CTA_SYNPROXY_ITS] = { .type = NLA_U32 },
2114 [CTA_SYNPROXY_TSOFF] = { .type = NLA_U32 },
2115};
2116
2117static int ctnetlink_change_synproxy(struct nf_conn *ct,
2118 const struct nlattr * const cda[])
2119{
2120 struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
2121 struct nlattr *tb[CTA_SYNPROXY_MAX + 1];
2122 int err;
2123
2124 if (!synproxy)
2125 return 0;
2126
8cb08174
JB		 2127 err = nla_parse_nested_deprecated(tb, CTA_SYNPROXY_MAX,
2128 cda[CTA_SYNPROXY], synproxy_policy,
2129 NULL);
20710b3b
PNA		 2130 if (err < 0)
2131 return err;
2132
2133 if (!tb[CTA_SYNPROXY_ISN] ||
2134 !tb[CTA_SYNPROXY_ITS] ||
2135 !tb[CTA_SYNPROXY_TSOFF])
2136 return -EINVAL;
2137
2138 synproxy->isn = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ISN]));
2139 synproxy->its = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ITS]));
2140 synproxy->tsoff = ntohl(nla_get_be32(tb[CTA_SYNPROXY_TSOFF]));
2141
2142 return 0;
2143}
2144
9b21f6a9
FW		 2145static int
2146ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
2147{
2148#ifdef CONFIG_NF_CONNTRACK_LABELS
2149 size_t len = nla_len(cda[CTA_LABELS]);
2150 const void *mask = cda[CTA_LABELS_MASK];
2151
2152 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
2153 return -EINVAL;
2154
2155 if (mask) {
2156 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
2157 nla_len(cda[CTA_LABELS_MASK]) != len)
2158 return -EINVAL;
2159 mask = nla_data(cda[CTA_LABELS_MASK]);
2160 }
2161
2162 len /= sizeof(u32);
2163
2164 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
2165#else
2166 return -EOPNOTSUPP;
2167#endif
2168}
2169
c1d10adb 2170static int
39938324
PM		 2171ctnetlink_change_conntrack(struct nf_conn *ct,
2172 const struct nlattr * const cda[])
c1d10adb
PNA		 2173{
2174 int err;
2175
e098360f
PNA		 2176 /* only allow NAT changes and master assignation for new conntracks */
2177 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
2178 return -EOPNOTSUPP;
2179
df6fb868 2180 if (cda[CTA_HELP]) {
c1d10adb
PNA		 2181 err = ctnetlink_change_helper(ct, cda);
2182 if (err < 0)
2183 return err;
2184 }
2185
df6fb868 2186 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 2187 err = ctnetlink_change_timeout(ct, cda);
2188 if (err < 0)
2189 return err;
2190 }
2191
df6fb868 2192 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 2193 err = ctnetlink_change_status(ct, cda);
2194 if (err < 0)
2195 return err;
2196 }
2197
df6fb868 2198 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 2199 err = ctnetlink_change_protoinfo(ct, cda);
2200 if (err < 0)
2201 return err;
2202 }
2203
bcd1e830 2204#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 2205 if (cda[CTA_MARK])
58fc419b 2206 ctnetlink_change_mark(ct, cda);
c1d10adb
PNA		 2207#endif
2208
41d73ec0
PM		 2209 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
2210 err = ctnetlink_change_seq_adj(ct, cda);
13eae15a
PNA		 2211 if (err < 0)
2212 return err;
2213 }
41d73ec0 2214
20710b3b
PNA		 2215 if (cda[CTA_SYNPROXY]) {
2216 err = ctnetlink_change_synproxy(ct, cda);
2217 if (err < 0)
2218 return err;
2219 }
2220
9b21f6a9
FW		 2221 if (cda[CTA_LABELS]) {
2222 err = ctnetlink_attach_labels(ct, cda);
2223 if (err < 0)
2224 return err;
2225 }
13eae15a 2226
c1d10adb
PNA		 2227 return 0;
2228}
2229
f0a3c086 2230static struct nf_conn *
308ac914
DB		 2231ctnetlink_create_conntrack(struct net *net,
2232 const struct nf_conntrack_zone *zone,
9592a5c0 2233 const struct nlattr * const cda[],
c1d10adb 2234 struct nf_conntrack_tuple *otuple,
5faa1f4c 2235 struct nf_conntrack_tuple *rtuple,
7ec47496 2236 u8 u3)
c1d10adb
PNA		 2237{
2238 struct nf_conn *ct;
2239 int err = -EINVAL;
ceceae1b 2240 struct nf_conntrack_helper *helper;
315c34da 2241 struct nf_conn_tstamp *tstamp;
8b1836c4 2242 u64 timeout;
c1d10adb 2243
ef00f89f 2244 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 2245 if (IS_ERR(ct))
f0a3c086 2246 return ERR_PTR(-ENOMEM);
c1d10adb 2247
df6fb868 2248 if (!cda[CTA_TIMEOUT])
0f5b3e85 2249 goto err1;
c1d10adb 2250
8b1836c4 2251 timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;
d7e79c97 2252 __nf_ct_set_timeout(ct, timeout);
c1d10adb 2253
1575e7ea 2254 rcu_read_lock();
226c0c0e 2255 if (cda[CTA_HELP]) {
29fe1b48 2256 char *helpname = NULL;
ae243bee
PNA		 2257 struct nlattr *helpinfo = NULL;
2258
2259 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 2260 if (err < 0)
2261 goto err2;
226c0c0e 2262
794e6871
PM		 2263 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2264 nf_ct_protonum(ct));
226c0c0e
PNA		 2265 if (helper == NULL) {
2266 rcu_read_unlock();
2267#ifdef CONFIG_MODULES
2268 if (request_module("nfct-helper-%s", helpname) < 0) {
2269 err = -EOPNOTSUPP;
0f5b3e85 2270 goto err1;
226c0c0e
PNA		 2271 }
2272
2273 rcu_read_lock();
794e6871
PM		 2274 helper = __nf_conntrack_helper_find(helpname,
2275 nf_ct_l3num(ct),
2276 nf_ct_protonum(ct));
226c0c0e 2277 if (helper) {
226c0c0e 2278 err = -EAGAIN;
0f5b3e85 2279 goto err2;
226c0c0e
PNA		 2280 }
2281 rcu_read_unlock();
2282#endif
2283 err = -EOPNOTSUPP;
0f5b3e85 2284 goto err1;
226c0c0e
PNA		 2285 } else {
2286 struct nf_conn_help *help;
2287
440534d3 2288 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
226c0c0e 2289 if (help == NULL) {
226c0c0e 2290 err = -ENOMEM;
0f5b3e85 2291 goto err2;
226c0c0e 2292 }
ae243bee 2293 /* set private helper data if allowed. */
7be54ca4 2294 if (helper->from_nlattr)
ae243bee 2295 helper->from_nlattr(helpinfo, ct);
226c0c0e 2296
d1ca60ef
FW		 2297 /* disable helper auto-assignment for this entry */
2298 ct->status |= IPS_HELPER;
a9b3cd7f 2299 RCU_INIT_POINTER(help->helper, helper);
226c0c0e 2300 }
1575e7ea
PNA		 2301 }
2302
0eba801b
PNA		 2303 err = ctnetlink_setup_nat(ct, cda);
2304 if (err < 0)
2305 goto err2;
e6a7d3c0 2306
a88e22ad 2307 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 2308 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 2309 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017 2310 nf_ct_labels_ext_add(ct);
87e94dbc
EL		 2311 nfct_seqadj_ext_add(ct);
2312 nfct_synproxy_ext_add(ct);
c539f017 2313
a88e22ad
PNA		 2314 /* we must add conntrack extensions before confirmation. */
2315 ct->status |= IPS_CONFIRMED;
2316
2317 if (cda[CTA_STATUS]) {
2318 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 2319 if (err < 0)
2320 goto err2;
bbb3357d 2321 }
c1d10adb 2322
41d73ec0
PM		 2323 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
2324 err = ctnetlink_change_seq_adj(ct, cda);
0f5b3e85
PM		 2325 if (err < 0)
2326 goto err2;
c969aa7d 2327 }
c969aa7d 2328
e5fc9e7a 2329 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 2330 if (cda[CTA_PROTOINFO]) {
c1d10adb 2331 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 2332 if (err < 0)
2333 goto err2;
c1d10adb
PNA		 2334 }
2335
20710b3b
PNA		 2336 if (cda[CTA_SYNPROXY]) {
2337 err = ctnetlink_change_synproxy(ct, cda);
2338 if (err < 0)
2339 goto err2;
2340 }
2341
bcd1e830 2342#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 2343 if (cda[CTA_MARK])
58fc419b 2344 ctnetlink_change_mark(ct, cda);
c1d10adb
PNA		 2345#endif
2346
5faa1f4c 2347 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 2348 if (cda[CTA_TUPLE_MASTER]) {
2349 struct nf_conntrack_tuple master;
2350 struct nf_conntrack_tuple_hash *master_h;
2351 struct nf_conn *master_ct;
2352
deedb590
DB		 2353 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
2354 u3, NULL);
7ec47496 2355 if (err < 0)
0f5b3e85 2356 goto err2;
7ec47496 2357
ef00f89f 2358 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 2359 if (master_h == NULL) {
2360 err = -ENOENT;
0f5b3e85 2361 goto err2;
7ec47496
PNA		 2362 }
2363 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 2364 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 2365 ct->master = master_ct;
f2a89004 2366 }
315c34da
PNA		 2367 tstamp = nf_conn_tstamp_find(ct);
2368 if (tstamp)
d2de875c 2369 tstamp->start = ktime_get_real_ns();
5faa1f4c 2370
7d367e06
JK		 2371 err = nf_conntrack_hash_check_insert(ct);
2372 if (err < 0)
2373 goto err2;
2374
58a3c9bb 2375 rcu_read_unlock();
dafc741c 2376
f0a3c086 2377 return ct;
c1d10adb 2378
0f5b3e85
PM		 2379err2:
2380 rcu_read_unlock();
2381err1:
c1d10adb 2382 nf_conntrack_free(ct);
f0a3c086 2383 return ERR_PTR(err);
c1d10adb
PNA		 2384}
2385
a6555365
PNA		 2386static int ctnetlink_new_conntrack(struct sk_buff *skb,
2387 const struct nfnl_info *info,
2388 const struct nlattr * const cda[])
c1d10adb
PNA		 2389{
2390 struct nf_conntrack_tuple otuple, rtuple;
2391 struct nf_conntrack_tuple_hash *h = NULL;
ef4b65e5 2392 u_int8_t u3 = info->nfmsg->nfgen_family;
308ac914 2393 struct nf_conntrack_zone zone;
a6555365 2394 struct nf_conn *ct;
ef00f89f
PM		 2395 int err;
2396
2397 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
2398 if (err < 0)
2399 return err;
c1d10adb 2400
df6fb868 2401 if (cda[CTA_TUPLE_ORIG]) {
deedb590
DB		 2402 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
2403 u3, &zone);
c1d10adb
PNA		 2404 if (err < 0)
2405 return err;
2406 }
2407
df6fb868 2408 if (cda[CTA_TUPLE_REPLY]) {
deedb590
DB		 2409 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
2410 u3, &zone);
c1d10adb
PNA		 2411 if (err < 0)
2412 return err;
2413 }
2414
df6fb868 2415 if (cda[CTA_TUPLE_ORIG])
a6555365 2416 h = nf_conntrack_find_get(info->net, &zone, &otuple);
df6fb868 2417 else if (cda[CTA_TUPLE_REPLY])
a6555365 2418 h = nf_conntrack_find_get(info->net, &zone, &rtuple);
c1d10adb
PNA		 2419
2420 if (h == NULL) {
c1d10adb 2421 err = -ENOENT;
a6555365 2422 if (info->nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 2423 enum ip_conntrack_events events;
5faa1f4c 2424
442fad94
FW		 2425 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
2426 return -EINVAL;
aa0c2c68
LZ		 2427 if (otuple.dst.protonum != rtuple.dst.protonum)
2428 return -EINVAL;
442fad94 2429
a6555365
PNA		 2430 ct = ctnetlink_create_conntrack(info->net, &zone, cda,
2431 &otuple, &rtuple, u3);
7d367e06
JK		 2432 if (IS_ERR(ct))
2433 return PTR_ERR(ct);
2434
f0a3c086 2435 err = 0;
fecc1133 2436 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
97aae0df 2437 events = 1 << IPCT_RELATED;
fecc1133 2438 else
97aae0df 2439 events = 1 << IPCT_NEW;
fecc1133 2440
9b21f6a9
FW		 2441 if (cda[CTA_LABELS] &&
2442 ctnetlink_attach_labels(ct, cda) == 0)
2443 events |= (1 << IPCT_LABEL);
2444
858b3133
PM		 2445 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
2446 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 2447 (1 << IPCT_HELPER) |
2448 (1 << IPCT_PROTOINFO) |
41d73ec0 2449 (1 << IPCT_SEQADJ) |
20710b3b
PNA		 2450 (1 << IPCT_MARK) |
2451 (1 << IPCT_SYNPROXY) |
2452 events,
15e47304 2453 ct, NETLINK_CB(skb).portid,
a6555365 2454 nlmsg_report(info->nlh));
f0a3c086 2455 nf_ct_put(ct);
7d367e06 2456 }
5faa1f4c 2457
c1d10adb
PNA		 2458 return err;
2459 }
2460 /* implicit 'else' */
2461
c1d10adb 2462 err = -EEXIST;
7d367e06 2463 ct = nf_ct_tuplehash_to_ctrack(h);
a6555365 2464 if (!(info->nlh->nlmsg_flags & NLM_F_EXCL)) {
19abb7b0
PNA		 2465 err = ctnetlink_change_conntrack(ct, cda);
2466 if (err == 0) {
858b3133
PM		 2467 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
2468 (1 << IPCT_ASSURED) |
a0891aa6 2469 (1 << IPCT_HELPER) |
797a7d66 2470 (1 << IPCT_LABEL) |
a0891aa6 2471 (1 << IPCT_PROTOINFO) |
41d73ec0 2472 (1 << IPCT_SEQADJ) |
20710b3b
PNA		 2473 (1 << IPCT_MARK) |
2474 (1 << IPCT_SYNPROXY),
15e47304 2475 ct, NETLINK_CB(skb).portid,
a6555365 2476 nlmsg_report(info->nlh));
7d367e06 2477 }
ff4ca827 2478 }
c1d10adb 2479
7d367e06 2480 nf_ct_put(ct);
c1d10adb
PNA		 2481 return err;
2482}
2483
392025f8 2484static int
15e47304 2485ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 2486 __u16 cpu, const struct ip_conntrack_stat *st)
2487{
2488 struct nlmsghdr *nlh;
15e47304 2489 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 2490
dedb67c4
PNA		 2491 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
2492 IPCTNL_MSG_CT_GET_STATS_CPU);
19c28b13
PNA		 2493 nlh = nfnl_msg_put(skb, portid, seq, event, flags, AF_UNSPEC,
2494 NFNETLINK_V0, htons(cpu));
2495 if (!nlh)
392025f8
PNA		 2496 goto nlmsg_failure;
2497
8e8118f8 2498 if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
392025f8 2499 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
392025f8
PNA		 2500 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
2501 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
2502 htonl(st->insert_failed)) ||
2503 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
2504 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
2505 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
2506 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
bc924704
FW		 2507 htonl(st->search_restart)) ||
2508 nla_put_be32(skb, CTA_STATS_CLASH_RESOLVE,
d7e7747a
FW		 2509 htonl(st->clash_resolve)) ||
2510 nla_put_be32(skb, CTA_STATS_CHAIN_TOOLONG,
2511 htonl(st->chaintoolong)))
392025f8
PNA		 2512 goto nla_put_failure;
2513
2514 nlmsg_end(skb, nlh);
2515 return skb->len;
2516
2517nla_put_failure:
2518nlmsg_failure:
2519 nlmsg_cancel(skb, nlh);
2520 return -1;
2521}
2522
2523static int
2524ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2525{
2526 int cpu;
2527 struct net *net = sock_net(skb->sk);
2528
2529 if (cb->args[0] == nr_cpu_ids)
2530 return 0;
2531
2532 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2533 const struct ip_conntrack_stat *st;
2534
2535 if (!cpu_possible(cpu))
2536 continue;
2537
2538 st = per_cpu_ptr(net->ct.stat, cpu);
2539 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 2540 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2541 cb->nlh->nlmsg_seq,
2542 cpu, st) < 0)
2543 break;
2544 }
2545 cb->args[0] = cpu;
2546
2547 return skb->len;
2548}
2549
a6555365
PNA		 2550static int ctnetlink_stat_ct_cpu(struct sk_buff *skb,
2551 const struct nfnl_info *info,
2552 const struct nlattr * const cda[])
392025f8 2553{
a6555365 2554 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
392025f8
PNA		 2555 struct netlink_dump_control c = {
2556 .dump = ctnetlink_ct_stat_cpu_dump,
2557 };
a6555365 2558 return netlink_dump_start(info->sk, skb, info->nlh, &c);
392025f8
PNA		 2559 }
2560
2561 return 0;
2562}
2563
2564static int
15e47304 2565ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 2566 struct net *net)
2567{
15e47304 2568 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c53bd0e9
FW		 2569 unsigned int nr_conntracks;
2570 struct nlmsghdr *nlh;
392025f8 2571
dedb67c4 2572 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS);
19c28b13
PNA		 2573 nlh = nfnl_msg_put(skb, portid, seq, event, flags, AF_UNSPEC,
2574 NFNETLINK_V0, 0);
2575 if (!nlh)
392025f8
PNA		 2576 goto nlmsg_failure;
2577
c53bd0e9 2578 nr_conntracks = nf_conntrack_count(net);
392025f8
PNA		 2579 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
2580 goto nla_put_failure;
2581
538c5672
FF		 2582 if (nla_put_be32(skb, CTA_STATS_GLOBAL_MAX_ENTRIES, htonl(nf_conntrack_max)))
2583 goto nla_put_failure;
2584
392025f8
PNA		 2585 nlmsg_end(skb, nlh);
2586 return skb->len;
2587
2588nla_put_failure:
2589nlmsg_failure:
2590 nlmsg_cancel(skb, nlh);
2591 return -1;
2592}
2593
a6555365
PNA		 2594static int ctnetlink_stat_ct(struct sk_buff *skb, const struct nfnl_info *info,
2595 const struct nlattr * const cda[])
392025f8
PNA		 2596{
2597 struct sk_buff *skb2;
2598 int err;
2599
2600 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2601 if (skb2 == NULL)
2602 return -ENOMEM;
2603
15e47304 2604 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
a6555365
PNA		 2605 info->nlh->nlmsg_seq,
2606 NFNL_MSG_TYPE(info->nlh->nlmsg_type),
392025f8 2607 sock_net(skb->sk));
e0241ae6
PNA		 2608 if (err <= 0) {
2609 kfree_skb(skb2);
2610 return -ENOMEM;
2611 }
392025f8 2612
e0241ae6 2613 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
392025f8
PNA		 2614}
2615
bd077937
PNA		 2616static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2617 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2618 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2619 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2620 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2621 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2622 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2623 .len = NF_CT_HELPER_NAME_LEN - 1 },
2624 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2625 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2626 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2627 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2628 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2629};
2630
2631static struct nf_conntrack_expect *
2632ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2633 struct nf_conntrack_helper *helper,
2634 struct nf_conntrack_tuple *tuple,
2635 struct nf_conntrack_tuple *mask);
2636
83f3e94d 2637#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 2638static size_t
a4b4766c 2639ctnetlink_glue_build_size(const struct nf_conn *ct)
9cb01766
PNA		 2640{
2641 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2642 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2643 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2644 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2645 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2646 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2647 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2648 + nla_total_size(0) /* CTA_PROTOINFO */
2649 + nla_total_size(0) /* CTA_HELP */
2650 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2651 + ctnetlink_secctx_size(ct)
6c89dac5
PNA		 2652 + ctnetlink_acct_size(ct)
2653 + ctnetlink_timestamp_size(ct)
4806e975 2654#if IS_ENABLED(CONFIG_NF_NAT)
9cb01766
PNA		 2655 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2656 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2657#endif
2658#ifdef CONFIG_NF_CONNTRACK_MARK
2659 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 2660#endif
2661#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 2662 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
9cb01766
PNA		 2663#endif
2664 + ctnetlink_proto_size(ct)
2665 ;
2666}
2667
a4b4766c 2668static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
9cb01766 2669{
308ac914 2670 const struct nf_conntrack_zone *zone;
9cb01766
PNA		 2671 struct nlattr *nest_parms;
2672
deedb590
DB		 2673 zone = nf_ct_zone(ct);
2674
ae0be8de 2675 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
9cb01766
PNA		 2676 if (!nest_parms)
2677 goto nla_put_failure;
2678 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2679 goto nla_put_failure;
deedb590
DB		 2680 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2681 NF_CT_ZONE_DIR_ORIG) < 0)
2682 goto nla_put_failure;
9cb01766
PNA		 2683 nla_nest_end(skb, nest_parms);
2684
ae0be8de 2685 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
9cb01766
PNA		 2686 if (!nest_parms)
2687 goto nla_put_failure;
2688 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2689 goto nla_put_failure;
deedb590
DB		 2690 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2691 NF_CT_ZONE_DIR_REPL) < 0)
2692 goto nla_put_failure;
9cb01766
PNA		 2693 nla_nest_end(skb, nest_parms);
2694
deedb590
DB		 2695 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
2696 NF_CT_DEFAULT_ZONE_DIR) < 0)
308ac914 2697 goto nla_put_failure;
9cb01766
PNA		 2698
2699 if (ctnetlink_dump_id(skb, ct) < 0)
2700 goto nla_put_failure;
2701
2702 if (ctnetlink_dump_status(skb, ct) < 0)
2703 goto nla_put_failure;
2704
86d21fc7 2705 if (ctnetlink_dump_timeout(skb, ct, false) < 0)
9cb01766
PNA		 2706 goto nla_put_failure;
2707
86d21fc7 2708 if (ctnetlink_dump_protoinfo(skb, ct, false) < 0)
9cb01766
PNA		 2709 goto nla_put_failure;
2710
6c89dac5
PNA		 2711 if (ctnetlink_dump_acct(skb, ct, IPCTNL_MSG_CT_GET) < 0 ||
2712 ctnetlink_dump_timestamp(skb, ct) < 0)
2713 goto nla_put_failure;
2714
9cb01766
PNA		 2715 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2716 goto nla_put_failure;
2717
2718#ifdef CONFIG_NF_CONNTRACK_SECMARK
2719 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2720 goto nla_put_failure;
2721#endif
2722 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2723 goto nla_put_failure;
2724
2725 if ((ct->status & IPS_SEQ_ADJUST) &&
41d73ec0 2726 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
9cb01766
PNA		 2727 goto nla_put_failure;
2728
20710b3b
PNA		 2729 if (ctnetlink_dump_ct_synproxy(skb, ct) < 0)
2730 goto nla_put_failure;
2731
9cb01766
PNA		 2732#ifdef CONFIG_NF_CONNTRACK_MARK
2733 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2734 goto nla_put_failure;
2735#endif
0ceabd83
FW		 2736 if (ctnetlink_dump_labels(skb, ct) < 0)
2737 goto nla_put_failure;
9cb01766
PNA		 2738 return 0;
2739
2740nla_put_failure:
9cb01766
PNA		 2741 return -ENOSPC;
2742}
2743
b7bd1809 2744static int
a4b4766c
KM		 2745ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
2746 enum ip_conntrack_info ctinfo,
2747 u_int16_t ct_attr, u_int16_t ct_info_attr)
b7bd1809
PNA		 2748{
2749 struct nlattr *nest_parms;
2750
ae0be8de 2751 nest_parms = nla_nest_start(skb, ct_attr);
b7bd1809
PNA		 2752 if (!nest_parms)
2753 goto nla_put_failure;
2754
a4b4766c 2755 if (__ctnetlink_glue_build(skb, ct) < 0)
b7bd1809
PNA		 2756 goto nla_put_failure;
2757
2758 nla_nest_end(skb, nest_parms);
2759
2760 if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
2761 goto nla_put_failure;
2762
2763 return 0;
2764
2765nla_put_failure:
2766 return -ENOSPC;
2767}
2768
a963d710
KC		 2769static int
2770ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[])
2771{
2772 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
2773 unsigned long d = ct->status ^ status;
2774
2775 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
2776 /* SEEN_REPLY bit can only be set */
2777 return -EBUSY;
2778
2779 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
2780 /* ASSURED bit can only be set */
2781 return -EBUSY;
2782
2783 /* This check is less strict than ctnetlink_change_status()
2784 * because callers often flip IPS_EXPECTED bits when sending
2785 * an NFQA_CT attribute to the kernel. So ignore the
53b56da8
LZ		 2786 * unchangeable bits but do not error out. Also user programs
2787 * are allowed to clear the bits that they are allowed to change.
a963d710 2788 */
ef69aa3a 2789 __nf_ct_change_status(ct, status, ~status);
a963d710
KC		 2790 return 0;
2791}
2792
9cb01766 2793static int
a4b4766c 2794ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
9cb01766
PNA		 2795{
2796 int err;
2797
2798 if (cda[CTA_TIMEOUT]) {
2799 err = ctnetlink_change_timeout(ct, cda);
2800 if (err < 0)
2801 return err;
2802 }
2803 if (cda[CTA_STATUS]) {
a963d710 2804 err = ctnetlink_update_status(ct, cda);
9cb01766
PNA		 2805 if (err < 0)
2806 return err;
2807 }
2808 if (cda[CTA_HELP]) {
2809 err = ctnetlink_change_helper(ct, cda);
2810 if (err < 0)
2811 return err;
2812 }
9b21f6a9
FW		 2813 if (cda[CTA_LABELS]) {
2814 err = ctnetlink_attach_labels(ct, cda);
2815 if (err < 0)
2816 return err;
2817 }
9cb01766 2818#if defined(CONFIG_NF_CONNTRACK_MARK)
534473c6 2819 if (cda[CTA_MARK]) {
58fc419b 2820 ctnetlink_change_mark(ct, cda);
534473c6 2821 }
9cb01766
PNA		 2822#endif
2823 return 0;
2824}
2825
2826static int
a4b4766c 2827ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
9cb01766
PNA		 2828{
2829 struct nlattr *cda[CTA_MAX+1];
68e035c9 2830 int ret;
9cb01766 2831
8cb08174
JB		 2832 ret = nla_parse_nested_deprecated(cda, CTA_MAX, attr, ct_nla_policy,
2833 NULL);
130ffbc2
DB		 2834 if (ret < 0)
2835 return ret;
9cb01766 2836
88be4c09 2837 return ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
9cb01766
PNA		 2838}
2839
a4b4766c
KM		 2840static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
2841 const struct nf_conn *ct,
2842 struct nf_conntrack_tuple *tuple,
2843 struct nf_conntrack_tuple *mask)
bd077937
PNA		 2844{
2845 int err;
2846
2847 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
deedb590 2848 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2849 if (err < 0)
2850 return err;
2851
2852 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
deedb590 2853 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2854}
2855
2856static int
a4b4766c
KM		 2857ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2858 u32 portid, u32 report)
bd077937
PNA		 2859{
2860 struct nlattr *cda[CTA_EXPECT_MAX+1];
2861 struct nf_conntrack_tuple tuple, mask;
b7e092c0 2862 struct nf_conntrack_helper *helper = NULL;
bd077937
PNA		 2863 struct nf_conntrack_expect *exp;
2864 int err;
2865
8cb08174
JB		 2866 err = nla_parse_nested_deprecated(cda, CTA_EXPECT_MAX, attr,
2867 exp_nla_policy, NULL);
bd077937
PNA		 2868 if (err < 0)
2869 return err;
2870
a4b4766c
KM		 2871 err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
2872 ct, &tuple, &mask);
bd077937
PNA		 2873 if (err < 0)
2874 return err;
2875
2876 if (cda[CTA_EXPECT_HELP_NAME]) {
2877 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2878
2879 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2880 nf_ct_protonum(ct));
2881 if (helper == NULL)
2882 return -EOPNOTSUPP;
2883 }
2884
2885 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2886 helper, &tuple, &mask);
2887 if (IS_ERR(exp))
2888 return PTR_ERR(exp);
2889
3c00fb0b 2890 err = nf_ct_expect_related_report(exp, portid, report, 0);
b18bcb00
LZ		 2891 nf_ct_expect_put(exp);
2892 return err;
bd077937
PNA		 2893}
2894
a4b4766c
KM		 2895static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
2896 enum ip_conntrack_info ctinfo, int diff)
b7bd1809
PNA		 2897{
2898 if (!(ct->status & IPS_NAT_MASK))
2899 return;
2900
2901 nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
2902}
2903
285c8a7a 2904static const struct nfnl_ct_hook ctnetlink_glue_hook = {
a4b4766c
KM		 2905 .build_size = ctnetlink_glue_build_size,
2906 .build = ctnetlink_glue_build,
2907 .parse = ctnetlink_glue_parse,
2908 .attach_expect = ctnetlink_glue_attach_expect,
2909 .seq_adjust = ctnetlink_glue_seqadj,
9cb01766 2910};
83f3e94d 2911#endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
9cb01766 2912
601e68e1
YH		 2913/***********************************************************************
2914 * EXPECT
2915 ***********************************************************************/
c1d10adb 2916
4054ff45
PNA		 2917static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2918 const struct nf_conntrack_tuple *tuple,
a2b7cbdd 2919 u32 type)
c1d10adb 2920{
df6fb868 2921 struct nlattr *nest_parms;
601e68e1 2922
ae0be8de 2923 nest_parms = nla_nest_start(skb, type);
df6fb868
PM		 2924 if (!nest_parms)
2925 goto nla_put_failure;
c1d10adb 2926 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2927 goto nla_put_failure;
2928 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2929
2930 return 0;
2931
df6fb868 2932nla_put_failure:
c1d10adb 2933 return -1;
601e68e1 2934}
c1d10adb 2935
4054ff45
PNA		 2936static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
2937 const struct nf_conntrack_tuple *tuple,
2938 const struct nf_conntrack_tuple_mask *mask)
1cde6436 2939{
b3480fe0 2940 const struct nf_conntrack_l4proto *l4proto;
d4156e8c 2941 struct nf_conntrack_tuple m;
df6fb868 2942 struct nlattr *nest_parms;
b3480fe0 2943 int ret;
d4156e8c
PM		 2944
2945 memset(&m, 0xFF, sizeof(m));
d4156e8c 2946 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c 2947 m.src.u.all = mask->src.u.all;
b58f33d4 2948 m.src.l3num = tuple->src.l3num;
e578756c 2949 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2950
ae0be8de 2951 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK);
df6fb868
PM		 2952 if (!nest_parms)
2953 goto nla_put_failure;
1cde6436 2954
3b988ece 2955 rcu_read_lock();
f957be9d 2956 ret = ctnetlink_dump_tuples_ip(skb, &m);
3b988ece 2957 if (ret >= 0) {
4a60dc74 2958 l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
48ab807c 2959 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2960 }
2961 rcu_read_unlock();
2962
1cde6436 2963 if (unlikely(ret < 0))
df6fb868 2964 goto nla_put_failure;
1cde6436 2965
df6fb868 2966 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2967
2968 return 0;
2969
df6fb868 2970nla_put_failure:
1cde6436
PNA		 2971 return -1;
2972}
2973
c7232c99
PM		 2974static const union nf_inet_addr any_addr;
2975
3c791076
FW		 2976static __be32 nf_expect_get_id(const struct nf_conntrack_expect *exp)
2977{
49ecc2e9 2978 static siphash_aligned_key_t exp_id_seed;
3c791076
FW		 2979 unsigned long a, b, c, d;
2980
2981 net_get_random_once(&exp_id_seed, sizeof(exp_id_seed));
2982
2983 a = (unsigned long)exp;
2984 b = (unsigned long)exp->helper;
2985 c = (unsigned long)exp->master;
2986 d = (unsigned long)siphash(&exp->tuple, sizeof(exp->tuple), &exp_id_seed);
2987
2988#ifdef CONFIG_64BIT
2989 return (__force __be32)siphash_4u64((u64)a, (u64)b, (u64)c, (u64)d, &exp_id_seed);
2990#else
2991 return (__force __be32)siphash_4u32((u32)a, (u32)b, (u32)c, (u32)d, &exp_id_seed);
2992#endif
2993}
2994
bb5cf80e 2995static int
c1d10adb 2996ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2997 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2998{
2999 struct nf_conn *master = exp->master;
c1216382 3000 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 3001 struct nf_conn_help *help;
4806e975 3002#if IS_ENABLED(CONFIG_NF_NAT)
076a0ca0
PNA		 3003 struct nlattr *nest_parms;
3004 struct nf_conntrack_tuple nat_tuple = {};
3005#endif
544d5c7d
PNA		 3006 struct nf_ct_helper_expectfn *expfn;
3007
d978e5da
PM		 3008 if (timeout < 0)
3009 timeout = 0;
c1d10adb
PNA		 3010
3011 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 3012 goto nla_put_failure;
1cde6436 3013 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 3014 goto nla_put_failure;
c1d10adb
PNA		 3015 if (ctnetlink_exp_dump_tuple(skb,
3016 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
3017 CTA_EXPECT_MASTER) < 0)
df6fb868 3018 goto nla_put_failure;
601e68e1 3019
4806e975 3020#if IS_ENABLED(CONFIG_NF_NAT)
c7232c99
PM		 3021 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
3022 exp->saved_proto.all) {
ae0be8de 3023 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT);
076a0ca0
PNA		 3024 if (!nest_parms)
3025 goto nla_put_failure;
3026
cc1eb431
DM		 3027 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
3028 goto nla_put_failure;
076a0ca0
PNA		 3029
3030 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 3031 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 3032 nat_tuple.dst.protonum = nf_ct_protonum(master);
3033 nat_tuple.src.u = exp->saved_proto;
3034
3035 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
3036 CTA_EXPECT_NAT_TUPLE) < 0)
3037 goto nla_put_failure;
3038 nla_nest_end(skb, nest_parms);
3039 }
3040#endif
cc1eb431 3041 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
3c791076 3042 nla_put_be32(skb, CTA_EXPECT_ID, nf_expect_get_id(exp)) ||
cc1eb431
DM		 3043 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
3044 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
3045 goto nla_put_failure;
bc01befd
PNA		 3046 help = nfct_help(master);
3047 if (help) {
3048 struct nf_conntrack_helper *helper;
3049
3050 helper = rcu_dereference(help->helper);
cc1eb431
DM		 3051 if (helper &&
3052 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
3053 goto nla_put_failure;
bc01befd 3054 }
544d5c7d 3055 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 3056 if (expfn != NULL &&
3057 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
3058 goto nla_put_failure;
c1d10adb
PNA		 3059
3060 return 0;
601e68e1 3061
df6fb868 3062nla_put_failure:
c1d10adb
PNA		 3063 return -1;
3064}
3065
3066static int
15e47304 3067ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 3068 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 3069{
3070 struct nlmsghdr *nlh;
15e47304 3071 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb 3072
dedb67c4 3073 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event);
19c28b13
PNA		 3074 nlh = nfnl_msg_put(skb, portid, seq, event, flags,
3075 exp->tuple.src.l3num, NFNETLINK_V0, 0);
3076 if (!nlh)
96bcf938 3077 goto nlmsg_failure;
c1d10adb 3078
c1d10adb 3079 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 3080 goto nla_put_failure;
c1d10adb 3081
96bcf938 3082 nlmsg_end(skb, nlh);
c1d10adb
PNA		 3083 return skb->len;
3084
3085nlmsg_failure:
df6fb868 3086nla_put_failure:
96bcf938 3087 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 3088 return -1;
3089}
3090
3091#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a 3092static int
bd1431db 3093ctnetlink_expect_event(unsigned int events, const struct nf_exp_event *item)
c1d10adb 3094{
9592a5c0
AD		 3095 struct nf_conntrack_expect *exp = item->exp;
3096 struct net *net = nf_ct_exp_net(exp);
c1d10adb 3097 struct nlmsghdr *nlh;
c1d10adb 3098 struct sk_buff *skb;
ebbf41df 3099 unsigned int type, group;
c1d10adb
PNA		 3100 int flags = 0;
3101
ebbf41df
PNA		 3102 if (events & (1 << IPEXP_DESTROY)) {
3103 type = IPCTNL_MSG_EXP_DELETE;
3104 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
3105 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 3106 type = IPCTNL_MSG_EXP_NEW;
3107 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 3108 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 3109 } else
e34d5c1a 3110 return 0;
c1d10adb 3111
ebbf41df 3112 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 3113 return 0;
b3a27bfb 3114
96bcf938
PNA		 3115 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3116 if (skb == NULL)
150ace0d 3117 goto errout;
c1d10adb 3118
dedb67c4 3119 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type);
19c28b13
PNA		 3120 nlh = nfnl_msg_put(skb, item->portid, 0, type, flags,
3121 exp->tuple.src.l3num, NFNETLINK_V0, 0);
3122 if (!nlh)
96bcf938 3123 goto nlmsg_failure;
c1d10adb 3124
c1d10adb 3125 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 3126 goto nla_put_failure;
c1d10adb 3127
96bcf938 3128 nlmsg_end(skb, nlh);
15e47304 3129 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 3130 return 0;
c1d10adb 3131
df6fb868 3132nla_put_failure:
96bcf938 3133 nlmsg_cancel(skb, nlh);
528a3a6f 3134nlmsg_failure:
c1d10adb 3135 kfree_skb(skb);
150ace0d 3136errout:
9592a5c0 3137 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 3138 return 0;
c1d10adb
PNA		 3139}
3140#endif
cf6994c2
PM		 3141static int ctnetlink_exp_done(struct netlink_callback *cb)
3142{
31f15875
PM		 3143 if (cb->args[1])
3144 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 3145 return 0;
3146}
c1d10adb
PNA		 3147
3148static int
3149ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
3150{
9592a5c0 3151 struct net *net = sock_net(skb->sk);
cf6994c2 3152 struct nf_conntrack_expect *exp, *last;
96bcf938 3153 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 3154 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 3155
7d0742da 3156 rcu_read_lock();
31f15875
PM		 3157 last = (struct nf_conntrack_expect *)cb->args[1];
3158 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 3159restart:
7cddd967
LZ		 3160 hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]],
3161 hnode) {
31f15875 3162 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 3163 continue;
03d7dc5c
FW		 3164
3165 if (!net_eq(nf_ct_net(exp->master), net))
3166 continue;
3167
31f15875
PM		 3168 if (cb->args[1]) {
3169 if (exp != last)
3170 continue;
3171 cb->args[1] = 0;
3172 }
8b0a231d 3173 if (ctnetlink_exp_fill_info(skb,
15e47304 3174 NETLINK_CB(cb->skb).portid,
31f15875
PM		 3175 cb->nlh->nlmsg_seq,
3176 IPCTNL_MSG_EXP_NEW,
8b0a231d 3177 exp) < 0) {
b54ab92b 3178 if (!refcount_inc_not_zero(&exp->use))
7d0742da 3179 continue;
31f15875
PM		 3180 cb->args[1] = (unsigned long)exp;
3181 goto out;
3182 }
cf6994c2 3183 }
31f15875
PM		 3184 if (cb->args[1]) {
3185 cb->args[1] = 0;
3186 goto restart;
cf6994c2
PM		 3187 }
3188 }
601e68e1 3189out:
7d0742da 3190 rcu_read_unlock();
cf6994c2
PM		 3191 if (last)
3192 nf_ct_expect_put(last);
c1d10adb 3193
c1d10adb
PNA		 3194 return skb->len;
3195}
3196
e844a928
PNA		 3197static int
3198ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
3199{
3200 struct nf_conntrack_expect *exp, *last;
3201 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
3202 struct nf_conn *ct = cb->data;
3203 struct nf_conn_help *help = nfct_help(ct);
3204 u_int8_t l3proto = nfmsg->nfgen_family;
3205
3206 if (cb->args[0])
3207 return 0;
3208
3209 rcu_read_lock();
3210 last = (struct nf_conntrack_expect *)cb->args[1];
3211restart:
7cddd967 3212 hlist_for_each_entry_rcu(exp, &help->expectations, lnode) {
e844a928
PNA		 3213 if (l3proto && exp->tuple.src.l3num != l3proto)
3214 continue;
3215 if (cb->args[1]) {
3216 if (exp != last)
3217 continue;
3218 cb->args[1] = 0;
3219 }
3220 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
3221 cb->nlh->nlmsg_seq,
3222 IPCTNL_MSG_EXP_NEW,
3223 exp) < 0) {
b54ab92b 3224 if (!refcount_inc_not_zero(&exp->use))
e844a928
PNA		 3225 continue;
3226 cb->args[1] = (unsigned long)exp;
3227 goto out;
3228 }
3229 }
3230 if (cb->args[1]) {
3231 cb->args[1] = 0;
3232 goto restart;
3233 }
3234 cb->args[0] = 1;
3235out:
3236 rcu_read_unlock();
3237 if (last)
3238 nf_ct_expect_put(last);
3239
3240 return skb->len;
3241}
3242
7b8002a1
PNA		 3243static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
3244 struct sk_buff *skb,
e844a928 3245 const struct nlmsghdr *nlh,
04ba724b
PNA		 3246 const struct nlattr * const cda[],
3247 struct netlink_ext_ack *extack)
e844a928
PNA		 3248{
3249 int err;
e844a928
PNA		 3250 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
3251 u_int8_t u3 = nfmsg->nfgen_family;
3252 struct nf_conntrack_tuple tuple;
3253 struct nf_conntrack_tuple_hash *h;
3254 struct nf_conn *ct;
308ac914 3255 struct nf_conntrack_zone zone;
e844a928
PNA		 3256 struct netlink_dump_control c = {
3257 .dump = ctnetlink_exp_ct_dump_table,
3258 .done = ctnetlink_exp_done,
3259 };
3260
deedb590
DB		 3261 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
3262 u3, NULL);
e844a928
PNA		 3263 if (err < 0)
3264 return err;
3265
308ac914
DB		 3266 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3267 if (err < 0)
3268 return err;
e844a928 3269
308ac914 3270 h = nf_conntrack_find_get(net, &zone, &tuple);
e844a928
PNA		 3271 if (!h)
3272 return -ENOENT;
3273
3274 ct = nf_ct_tuplehash_to_ctrack(h);
207df815
LZ		 3275 /* No expectation linked to this connection tracking. */
3276 if (!nfct_help(ct)) {
3277 nf_ct_put(ct);
3278 return 0;
3279 }
3280
e844a928
PNA		 3281 c.data = ct;
3282
3283 err = netlink_dump_start(ctnl, skb, nlh, &c);
3284 nf_ct_put(ct);
3285
3286 return err;
3287}
3288
a6555365
PNA		 3289static int ctnetlink_get_expect(struct sk_buff *skb,
3290 const struct nfnl_info *info,
3291 const struct nlattr * const cda[])
c1d10adb 3292{
ef4b65e5 3293 u_int8_t u3 = info->nfmsg->nfgen_family;
c1d10adb
PNA		 3294 struct nf_conntrack_tuple tuple;
3295 struct nf_conntrack_expect *exp;
308ac914 3296 struct nf_conntrack_zone zone;
a6555365 3297 struct sk_buff *skb2;
ef00f89f 3298 int err;
c1d10adb 3299
a6555365 3300 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928 3301 if (cda[CTA_EXPECT_MASTER])
a6555365
PNA		 3302 return ctnetlink_dump_exp_ct(info->net, info->sk, skb,
3303 info->nlh, cda,
3304 info->extack);
e844a928
PNA		 3305 else {
3306 struct netlink_dump_control c = {
3307 .dump = ctnetlink_exp_dump_table,
3308 .done = ctnetlink_exp_done,
3309 };
a6555365 3310 return netlink_dump_start(info->sk, skb, info->nlh, &c);
e844a928 3311 }
c1d10adb
PNA		 3312 }
3313
ef00f89f
PM		 3314 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3315 if (err < 0)
3316 return err;
3317
35dba1d7 3318 if (cda[CTA_EXPECT_TUPLE])
deedb590
DB		 3319 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3320 u3, NULL);
35dba1d7 3321 else if (cda[CTA_EXPECT_MASTER])
deedb590
DB		 3322 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
3323 u3, NULL);
c1d10adb
PNA		 3324 else
3325 return -EINVAL;
3326
3327 if (err < 0)
3328 return err;
3329
a6555365 3330 exp = nf_ct_expect_find_get(info->net, &zone, &tuple);
c1d10adb
PNA		 3331 if (!exp)
3332 return -ENOENT;
3333
df6fb868 3334 if (cda[CTA_EXPECT_ID]) {
77236b6e 3335 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
3c791076
FW		 3336
3337 if (id != nf_expect_get_id(exp)) {
6823645d 3338 nf_ct_expect_put(exp);
c1d10adb
PNA		 3339 return -ENOENT;
3340 }
601e68e1 3341 }
c1d10adb 3342
96bcf938 3343 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
e0241ae6 3344 if (!skb2) {
81378f72 3345 nf_ct_expect_put(exp);
e0241ae6 3346 return -ENOMEM;
81378f72 3347 }
4e9b8269 3348
528a3a6f 3349 rcu_read_lock();
15e47304 3350 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
a6555365
PNA		 3351 info->nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW,
3352 exp);
528a3a6f 3353 rcu_read_unlock();
81378f72 3354 nf_ct_expect_put(exp);
e0241ae6
PNA		 3355 if (err <= 0) {
3356 kfree_skb(skb2);
3357 return -ENOMEM;
3358 }
c1d10adb 3359
e0241ae6 3360 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
c1d10adb
PNA		 3361}
3362
ac7b8483
FW		 3363static bool expect_iter_name(struct nf_conntrack_expect *exp, void *data)
3364{
e14575fa 3365 struct nf_conntrack_helper *helper;
ac7b8483
FW		 3366 const struct nf_conn_help *m_help;
3367 const char *name = data;
3368
3369 m_help = nfct_help(exp->master);
3370
e14575fa
FW		 3371 helper = rcu_dereference(m_help->helper);
3372 if (!helper)
3373 return false;
3374
3375 return strcmp(helper->name, name) == 0;
ac7b8483
FW		 3376}
3377
3378static bool expect_iter_all(struct nf_conntrack_expect *exp, void *data)
3379{
3380 return true;
3381}
3382
a6555365
PNA		 3383static int ctnetlink_del_expect(struct sk_buff *skb,
3384 const struct nfnl_info *info,
3385 const struct nlattr * const cda[])
c1d10adb 3386{
ef4b65e5 3387 u_int8_t u3 = info->nfmsg->nfgen_family;
31f15875 3388 struct nf_conntrack_expect *exp;
c1d10adb 3389 struct nf_conntrack_tuple tuple;
308ac914 3390 struct nf_conntrack_zone zone;
c1d10adb
PNA		 3391 int err;
3392
df6fb868 3393 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 3394 /* delete a single expect by tuple */
ef00f89f
PM		 3395 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3396 if (err < 0)
3397 return err;
3398
deedb590
DB		 3399 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3400 u3, NULL);
c1d10adb
PNA		 3401 if (err < 0)
3402 return err;
3403
3404 /* bump usage count to 2 */
a6555365 3405 exp = nf_ct_expect_find_get(info->net, &zone, &tuple);
c1d10adb
PNA		 3406 if (!exp)
3407 return -ENOENT;
3408
df6fb868 3409 if (cda[CTA_EXPECT_ID]) {
77236b6e 3410 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 3411 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 3412 nf_ct_expect_put(exp);
c1d10adb
PNA		 3413 return -ENOENT;
3414 }
3415 }
3416
3417 /* after list removal, usage count == 1 */
ca7433df 3418 spin_lock_bh(&nf_conntrack_expect_lock);
ebbf41df 3419 if (del_timer(&exp->timeout)) {
15e47304 3420 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
a6555365 3421 nlmsg_report(info->nlh));
ebbf41df
PNA		 3422 nf_ct_expect_put(exp);
3423 }
ca7433df 3424 spin_unlock_bh(&nf_conntrack_expect_lock);
601e68e1 3425 /* have to put what we 'get' above.
c1d10adb 3426 * after this line usage count == 0 */
6823645d 3427 nf_ct_expect_put(exp);
df6fb868
PM		 3428 } else if (cda[CTA_EXPECT_HELP_NAME]) {
3429 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
c1d10adb 3430
a6555365 3431 nf_ct_expect_iterate_net(info->net, expect_iter_name, name,
ac7b8483 3432 NETLINK_CB(skb).portid,
a6555365 3433 nlmsg_report(info->nlh));
c1d10adb
PNA		 3434 } else {
3435 /* This basically means we have to flush everything*/
a6555365 3436 nf_ct_expect_iterate_net(info->net, expect_iter_all, NULL,
ac7b8483 3437 NETLINK_CB(skb).portid,
a6555365 3438 nlmsg_report(info->nlh));
c1d10adb
PNA		 3439 }
3440
3441 return 0;
3442}
3443static int
39938324
PM		 3444ctnetlink_change_expect(struct nf_conntrack_expect *x,
3445 const struct nlattr * const cda[])
c1d10adb 3446{
9768e1ac
KW		 3447 if (cda[CTA_EXPECT_TIMEOUT]) {
3448 if (!del_timer(&x->timeout))
3449 return -ETIME;
3450
3451 x->timeout.expires = jiffies +
3452 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
3453 add_timer(&x->timeout);
3454 }
3455 return 0;
c1d10adb
PNA		 3456}
3457
076a0ca0
PNA		 3458static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
3459 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
3460 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
3461};
3462
3463static int
3464ctnetlink_parse_expect_nat(const struct nlattr *attr,
3465 struct nf_conntrack_expect *exp,
3466 u_int8_t u3)
3467{
4806e975 3468#if IS_ENABLED(CONFIG_NF_NAT)
076a0ca0
PNA		 3469 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
3470 struct nf_conntrack_tuple nat_tuple = {};
3471 int err;
3472
8cb08174
JB		 3473 err = nla_parse_nested_deprecated(tb, CTA_EXPECT_NAT_MAX, attr,
3474 exp_nat_nla_policy, NULL);
130ffbc2
DB		 3475 if (err < 0)
3476 return err;
076a0ca0
PNA		 3477
3478 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
3479 return -EINVAL;
3480
3481 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
deedb590
DB		 3482 &nat_tuple, CTA_EXPECT_NAT_TUPLE,
3483 u3, NULL);
076a0ca0
PNA		 3484 if (err < 0)
3485 return err;
3486
c7232c99 3487 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 3488 exp->saved_proto = nat_tuple.src.u;
3489 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
3490
3491 return 0;
3492#else
3493 return -EOPNOTSUPP;
3494#endif
3495}
3496
0ef71ee1
PNA		 3497static struct nf_conntrack_expect *
3498ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
3499 struct nf_conntrack_helper *helper,
3500 struct nf_conntrack_tuple *tuple,
3501 struct nf_conntrack_tuple *mask)
c1d10adb 3502{
0ef71ee1 3503 u_int32_t class = 0;
c1d10adb 3504 struct nf_conntrack_expect *exp;
dc808fe2 3505 struct nf_conn_help *help;
0ef71ee1 3506 int err;
660fdb2a 3507
2c62e0bc
GF		 3508 help = nfct_help(ct);
3509 if (!help)
3510 return ERR_PTR(-EOPNOTSUPP);
3511
b8c5e52c
PNA		 3512 if (cda[CTA_EXPECT_CLASS] && helper) {
3513 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
0ef71ee1
PNA		 3514 if (class > helper->expect_class_max)
3515 return ERR_PTR(-EINVAL);
b8c5e52c 3516 }
6823645d 3517 exp = nf_ct_expect_alloc(ct);
0ef71ee1
PNA		 3518 if (!exp)
3519 return ERR_PTR(-ENOMEM);
3520
2c62e0bc
GF		 3521 if (cda[CTA_EXPECT_FLAGS]) {
3522 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3523 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
bc01befd 3524 } else {
2c62e0bc 3525 exp->flags = 0;
bc01befd 3526 }
544d5c7d
PNA		 3527 if (cda[CTA_EXPECT_FN]) {
3528 const char *name = nla_data(cda[CTA_EXPECT_FN]);
3529 struct nf_ct_helper_expectfn *expfn;
3530
3531 expfn = nf_ct_helper_expectfn_find_by_name(name);
3532 if (expfn == NULL) {
3533 err = -EINVAL;
3534 goto err_out;
3535 }
3536 exp->expectfn = expfn->expectfn;
3537 } else
3538 exp->expectfn = NULL;
601e68e1 3539
b8c5e52c 3540 exp->class = class;
c1d10adb 3541 exp->master = ct;
660fdb2a 3542 exp->helper = helper;
0ef71ee1
PNA		 3543 exp->tuple = *tuple;
3544 exp->mask.src.u3 = mask->src.u3;
3545 exp->mask.src.u.all = mask->src.u.all;
c1d10adb 3546
076a0ca0
PNA		 3547 if (cda[CTA_EXPECT_NAT]) {
3548 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
0ef71ee1 3549 exp, nf_ct_l3num(ct));
076a0ca0
PNA		 3550 if (err < 0)
3551 goto err_out;
3552 }
0ef71ee1 3553 return exp;
076a0ca0 3554err_out:
6823645d 3555 nf_ct_expect_put(exp);
0ef71ee1
PNA		 3556 return ERR_PTR(err);
3557}
3558
3559static int
308ac914
DB		 3560ctnetlink_create_expect(struct net *net,
3561 const struct nf_conntrack_zone *zone,
0ef71ee1
PNA		 3562 const struct nlattr * const cda[],
3563 u_int8_t u3, u32 portid, int report)
3564{
3565 struct nf_conntrack_tuple tuple, mask, master_tuple;
3566 struct nf_conntrack_tuple_hash *h = NULL;
3567 struct nf_conntrack_helper *helper = NULL;
3568 struct nf_conntrack_expect *exp;
3569 struct nf_conn *ct;
3570 int err;
3571
3572 /* caller guarantees that those three CTA_EXPECT_* exist */
deedb590
DB		 3573 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3574 u3, NULL);
0ef71ee1
PNA		 3575 if (err < 0)
3576 return err;
deedb590
DB		 3577 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
3578 u3, NULL);
0ef71ee1
PNA		 3579 if (err < 0)
3580 return err;
deedb590
DB		 3581 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
3582 u3, NULL);
0ef71ee1
PNA		 3583 if (err < 0)
3584 return err;
3585
3586 /* Look for master conntrack of this expectation */
3587 h = nf_conntrack_find_get(net, zone, &master_tuple);
3588 if (!h)
3589 return -ENOENT;
3590 ct = nf_ct_tuplehash_to_ctrack(h);
3591
8b5995d0 3592 rcu_read_lock();
0ef71ee1
PNA		 3593 if (cda[CTA_EXPECT_HELP_NAME]) {
3594 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
3595
3596 helper = __nf_conntrack_helper_find(helpname, u3,
3597 nf_ct_protonum(ct));
3598 if (helper == NULL) {
8b5995d0 3599 rcu_read_unlock();
0ef71ee1
PNA		 3600#ifdef CONFIG_MODULES
3601 if (request_module("nfct-helper-%s", helpname) < 0) {
3602 err = -EOPNOTSUPP;
3603 goto err_ct;
3604 }
8b5995d0 3605 rcu_read_lock();
0ef71ee1
PNA		 3606 helper = __nf_conntrack_helper_find(helpname, u3,
3607 nf_ct_protonum(ct));
3608 if (helper) {
3609 err = -EAGAIN;
8b5995d0 3610 goto err_rcu;
0ef71ee1 3611 }
8b5995d0 3612 rcu_read_unlock();
0ef71ee1
PNA		 3613#endif
3614 err = -EOPNOTSUPP;
3615 goto err_ct;
3616 }
3617 }
3618
3619 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
3620 if (IS_ERR(exp)) {
3621 err = PTR_ERR(exp);
8b5995d0 3622 goto err_rcu;
0ef71ee1
PNA		 3623 }
3624
3c00fb0b 3625 err = nf_ct_expect_related_report(exp, portid, report, 0);
0ef71ee1 3626 nf_ct_expect_put(exp);
8b5995d0
GF		 3627err_rcu:
3628 rcu_read_unlock();
0ef71ee1
PNA		 3629err_ct:
3630 nf_ct_put(ct);
c1d10adb
PNA		 3631 return err;
3632}
3633
a6555365
PNA		 3634static int ctnetlink_new_expect(struct sk_buff *skb,
3635 const struct nfnl_info *info,
3636 const struct nlattr * const cda[])
c1d10adb 3637{
ef4b65e5 3638 u_int8_t u3 = info->nfmsg->nfgen_family;
c1d10adb
PNA		 3639 struct nf_conntrack_tuple tuple;
3640 struct nf_conntrack_expect *exp;
308ac914 3641 struct nf_conntrack_zone zone;
ef00f89f 3642 int err;
c1d10adb 3643
df6fb868
PM		 3644 if (!cda[CTA_EXPECT_TUPLE]
3645 || !cda[CTA_EXPECT_MASK]
3646 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 3647 return -EINVAL;
3648
ef00f89f
PM		 3649 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3650 if (err < 0)
3651 return err;
3652
deedb590
DB		 3653 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3654 u3, NULL);
c1d10adb
PNA		 3655 if (err < 0)
3656 return err;
3657
ca7433df 3658 spin_lock_bh(&nf_conntrack_expect_lock);
a6555365 3659 exp = __nf_ct_expect_find(info->net, &zone, &tuple);
c1d10adb 3660 if (!exp) {
ca7433df 3661 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3662 err = -ENOENT;
a6555365
PNA		 3663 if (info->nlh->nlmsg_flags & NLM_F_CREATE) {
3664 err = ctnetlink_create_expect(info->net, &zone, cda, u3,
15e47304 3665 NETLINK_CB(skb).portid,
a6555365 3666 nlmsg_report(info->nlh));
19abb7b0 3667 }
c1d10adb
PNA		 3668 return err;
3669 }
3670
3671 err = -EEXIST;
a6555365 3672 if (!(info->nlh->nlmsg_flags & NLM_F_EXCL))
c1d10adb 3673 err = ctnetlink_change_expect(exp, cda);
ca7433df 3674 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3675
c1d10adb
PNA		 3676 return err;
3677}
3678
392025f8 3679static int
15e47304 3680ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 3681 const struct ip_conntrack_stat *st)
3682{
3683 struct nlmsghdr *nlh;
15e47304 3684 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 3685
dedb67c4
PNA		 3686 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
3687 IPCTNL_MSG_EXP_GET_STATS_CPU);
19c28b13
PNA		 3688 nlh = nfnl_msg_put(skb, portid, seq, event, flags, AF_UNSPEC,
3689 NFNETLINK_V0, htons(cpu));
3690 if (!nlh)
392025f8
PNA		 3691 goto nlmsg_failure;
3692
392025f8
PNA		 3693 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3694 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3695 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3696 goto nla_put_failure;
3697
3698 nlmsg_end(skb, nlh);
3699 return skb->len;
3700
3701nla_put_failure:
3702nlmsg_failure:
3703 nlmsg_cancel(skb, nlh);
3704 return -1;
3705}
3706
3707static int
3708ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3709{
3710 int cpu;
3711 struct net *net = sock_net(skb->sk);
3712
3713 if (cb->args[0] == nr_cpu_ids)
3714 return 0;
3715
3716 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3717 const struct ip_conntrack_stat *st;
3718
3719 if (!cpu_possible(cpu))
3720 continue;
3721
3722 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 3723 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 3724 cb->nlh->nlmsg_seq,
3725 cpu, st) < 0)
3726 break;
3727 }
3728 cb->args[0] = cpu;
3729
3730 return skb->len;
3731}
3732
a6555365
PNA		 3733static int ctnetlink_stat_exp_cpu(struct sk_buff *skb,
3734 const struct nfnl_info *info,
3735 const struct nlattr * const cda[])
392025f8 3736{
a6555365 3737 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
392025f8
PNA		 3738 struct netlink_dump_control c = {
3739 .dump = ctnetlink_exp_stat_cpu_dump,
3740 };
a6555365 3741 return netlink_dump_start(info->sk, skb, info->nlh, &c);
392025f8
PNA		 3742 }
3743
3744 return 0;
3745}
3746
c1d10adb 3747#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a 3748static struct nf_ct_event_notifier ctnl_notifier = {
b86c0e64 3749 .ct_event = ctnetlink_conntrack_event,
b86c0e64 3750 .exp_event = ctnetlink_expect_event,
c1d10adb
PNA		 3751};
3752#endif
3753
7c8d4cb4 3754static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
50f2db9e
PNA		 3755 [IPCTNL_MSG_CT_NEW] = {
3756 .call = ctnetlink_new_conntrack,
3757 .type = NFNL_CB_MUTEX,
3758 .attr_count = CTA_MAX,
3759 .policy = ct_nla_policy
3760 },
3761 [IPCTNL_MSG_CT_GET] = {
3762 .call = ctnetlink_get_conntrack,
3763 .type = NFNL_CB_MUTEX,
3764 .attr_count = CTA_MAX,
3765 .policy = ct_nla_policy
3766 },
3767 [IPCTNL_MSG_CT_DELETE] = {
3768 .call = ctnetlink_del_conntrack,
3769 .type = NFNL_CB_MUTEX,
3770 .attr_count = CTA_MAX,
3771 .policy = ct_nla_policy
3772 },
3773 [IPCTNL_MSG_CT_GET_CTRZERO] = {
3774 .call = ctnetlink_get_conntrack,
3775 .type = NFNL_CB_MUTEX,
3776 .attr_count = CTA_MAX,
3777 .policy = ct_nla_policy
3778 },
3779 [IPCTNL_MSG_CT_GET_STATS_CPU] = {
3780 .call = ctnetlink_stat_ct_cpu,
3781 .type = NFNL_CB_MUTEX,
3782 },
3783 [IPCTNL_MSG_CT_GET_STATS] = {
3784 .call = ctnetlink_stat_ct,
3785 .type = NFNL_CB_MUTEX,
3786 },
3787 [IPCTNL_MSG_CT_GET_DYING] = {
3788 .call = ctnetlink_get_ct_dying,
3789 .type = NFNL_CB_MUTEX,
3790 },
3791 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = {
3792 .call = ctnetlink_get_ct_unconfirmed,
3793 .type = NFNL_CB_MUTEX,
3794 },
c1d10adb
PNA		 3795};
3796
7c8d4cb4 3797static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
50f2db9e
PNA		 3798 [IPCTNL_MSG_EXP_GET] = {
3799 .call = ctnetlink_get_expect,
3800 .type = NFNL_CB_MUTEX,
3801 .attr_count = CTA_EXPECT_MAX,
3802 .policy = exp_nla_policy
3803 },
3804 [IPCTNL_MSG_EXP_NEW] = {
3805 .call = ctnetlink_new_expect,
3806 .type = NFNL_CB_MUTEX,
3807 .attr_count = CTA_EXPECT_MAX,
3808 .policy = exp_nla_policy
3809 },
3810 [IPCTNL_MSG_EXP_DELETE] = {
3811 .call = ctnetlink_del_expect,
3812 .type = NFNL_CB_MUTEX,
3813 .attr_count = CTA_EXPECT_MAX,
3814 .policy = exp_nla_policy
3815 },
3816 [IPCTNL_MSG_EXP_GET_STATS_CPU] = {
3817 .call = ctnetlink_stat_exp_cpu,
3818 .type = NFNL_CB_MUTEX,
3819 },
c1d10adb
PNA		 3820};
3821
7c8d4cb4 3822static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 3823 .name = "conntrack",
3824 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3825 .cb_count = IPCTNL_MSG_MAX,
3826 .cb = ctnl_cb,
3827};
3828
7c8d4cb4 3829static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 3830 .name = "conntrack_expect",
3831 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3832 .cb_count = IPCTNL_MSG_EXP_MAX,
3833 .cb = ctnl_exp_cb,
3834};
3835
d2483dde 3836MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 3837MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 3838MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 3839
70e9942f
PNA		 3840static int __net_init ctnetlink_net_init(struct net *net)
3841{
3842#ifdef CONFIG_NF_CONNTRACK_EVENTS
b86c0e64 3843 nf_conntrack_register_notifier(net, &ctnl_notifier);
70e9942f
PNA		 3844#endif
3845 return 0;
70e9942f
PNA		 3846}
3847
bd1431db 3848static void ctnetlink_net_pre_exit(struct net *net)
70e9942f
PNA		 3849{
3850#ifdef CONFIG_NF_CONNTRACK_EVENTS
b86c0e64 3851 nf_conntrack_unregister_notifier(net);
70e9942f
PNA		 3852#endif
3853}
3854
70e9942f
PNA		 3855static struct pernet_operations ctnetlink_net_ops = {
3856 .init = ctnetlink_net_init,
bd1431db 3857 .pre_exit = ctnetlink_net_pre_exit,
70e9942f
PNA		 3858};
3859
c1d10adb
PNA		 3860static int __init ctnetlink_init(void)
3861{
3862 int ret;
3863
5948ed29
FW		 3864 BUILD_BUG_ON(sizeof(struct ctnetlink_list_dump_ctx) > sizeof_field(struct netlink_callback, ctx));
3865
c1d10adb
PNA		 3866 ret = nfnetlink_subsys_register(&ctnl_subsys);
3867 if (ret < 0) {
654d0fbd 3868 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 3869 goto err_out;
3870 }
3871
3872 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3873 if (ret < 0) {
654d0fbd 3874 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 3875 goto err_unreg_subsys;
3876 }
3877
ef6acf68
JL		 3878 ret = register_pernet_subsys(&ctnetlink_net_ops);
3879 if (ret < 0) {
70e9942f 3880 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 3881 goto err_unreg_exp_subsys;
3882 }
83f3e94d 3883#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 3884 /* setup interaction between nf_queue and nf_conntrack_netlink. */
a4b4766c 3885 RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook);
9cb01766 3886#endif
c1d10adb
PNA		 3887 return 0;
3888
c1d10adb
PNA		 3889err_unreg_exp_subsys:
3890 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 3891err_unreg_subsys:
3892 nfnetlink_subsys_unregister(&ctnl_subsys);
3893err_out:
3894 return ret;
3895}
3896
3897static void __exit ctnetlink_exit(void)
3898{
70e9942f 3899 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 3900 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3901 nfnetlink_subsys_unregister(&ctnl_subsys);
83f3e94d 3902#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
a4b4766c 3903 RCU_INIT_POINTER(nfnl_ct_hook, NULL);
9cb01766 3904#endif
3b7dabf0 3905 synchronize_rcu();
c1d10adb
PNA		 3906}
3907
3908module_init(ctnetlink_init);
3909module_exit(ctnetlink_exit);
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