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x86/msr-index: Cleanup bit defines
[mirror_ubuntu-bionic-kernel.git] / net / netfilter / nf_conntrack_netlink.c
CommitLineData
c1d10adb
PNA		 1/* Connection tracking via netlink socket. Allows for user space
2 * protocol helpers and general trouble making from userspace.
3 *
4 * (C) 2001 by Jay Schulist <jschlst@samba.org>
dc808fe2 5 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
c1d10adb 6 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
392025f8 7 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
c1d10adb 8 *
601e68e1 9 * Initial connection tracking via netlink development funded and
c1d10adb
PNA		 10 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
11 *
12 * Further development of this code funded by Astaro AG (http://www.astaro.com)
13 *
14 * This software may be used and distributed according to the terms
15 * of the GNU General Public License, incorporated herein by reference.
c1d10adb
PNA		 16 */
17
18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
711bbdd6 21#include <linux/rculist.h>
ea781f19 22#include <linux/rculist_nulls.h>
c1d10adb
PNA		 23#include <linux/types.h>
24#include <linux/timer.h>
1cc63249 25#include <linux/security.h>
c1d10adb
PNA		 26#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/netlink.h>
29#include <linux/spinlock.h>
40a839fd 30#include <linux/interrupt.h>
5a0e3ad6 31#include <linux/slab.h>
c1d10adb
PNA		 32
33#include <linux/netfilter.h>
dc5fc579 34#include <net/netlink.h>
9592a5c0 35#include <net/sock.h>
c1d10adb
PNA		 36#include <net/netfilter/nf_conntrack.h>
37#include <net/netfilter/nf_conntrack_core.h>
77ab9cff 38#include <net/netfilter/nf_conntrack_expect.h>
c1d10adb 39#include <net/netfilter/nf_conntrack_helper.h>
41d73ec0 40#include <net/netfilter/nf_conntrack_seqadj.h>
c1d10adb 41#include <net/netfilter/nf_conntrack_l3proto.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>
5b1158e9
JK		 49#ifdef CONFIG_NF_NAT_NEEDED
50#include <net/netfilter/nf_nat_core.h>
c7232c99 51#include <net/netfilter/nf_nat_l4proto.h>
8c88f87c 52#include <net/netfilter/nf_nat_helper.h>
5b1158e9 53#endif
c1d10adb
PNA		 54
55#include <linux/netfilter/nfnetlink.h>
56#include <linux/netfilter/nfnetlink_conntrack.h>
57
58MODULE_LICENSE("GPL");
59
dc808fe2 60static char __initdata version[] = "0.93";
c1d10adb 61
4054ff45 62static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
2a04aabf
JL		 63 const struct nf_conntrack_tuple *tuple,
64 const struct nf_conntrack_l4proto *l4proto)
c1d10adb 65{
c1d10adb 66 int ret = 0;
df6fb868 67 struct nlattr *nest_parms;
c1d10adb 68
df6fb868
PM		 69 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
70 if (!nest_parms)
71 goto nla_put_failure;
cc1eb431
DM		 72 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
73 goto nla_put_failure;
c1d10adb 74
fdf70832
PM		 75 if (likely(l4proto->tuple_to_nlattr))
76 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 77
df6fb868 78 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 79
80 return ret;
81
df6fb868 82nla_put_failure:
c1d10adb
PNA		 83 return -1;
84}
85
4054ff45
PNA		 86static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
87 const struct nf_conntrack_tuple *tuple,
2a04aabf 88 const struct nf_conntrack_l3proto *l3proto)
c1d10adb 89{
c1d10adb 90 int ret = 0;
df6fb868
PM		 91 struct nlattr *nest_parms;
92
93 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
94 if (!nest_parms)
95 goto nla_put_failure;
1cde6436 96
fdf70832
PM		 97 if (likely(l3proto->tuple_to_nlattr))
98 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 99
df6fb868 100 nla_nest_end(skb, nest_parms);
c1d10adb 101
1cde6436
PNA		 102 return ret;
103
df6fb868 104nla_put_failure:
1cde6436
PNA		 105 return -1;
106}
107
4054ff45
PNA		 108static int ctnetlink_dump_tuples(struct sk_buff *skb,
109 const struct nf_conntrack_tuple *tuple)
1cde6436 110{
b3480fe0
FW		 111 const struct nf_conntrack_l3proto *l3proto;
112 const struct nf_conntrack_l4proto *l4proto;
1cde6436 113 int ret;
1cde6436 114
3b988ece 115 rcu_read_lock();
528a3a6f 116 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 117 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 118
3b988ece
HS		 119 if (ret >= 0) {
120 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
121 tuple->dst.protonum);
122 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
123 }
124 rcu_read_unlock();
c1d10adb 125 return ret;
c1d10adb
PNA		 126}
127
4054ff45
PNA		 128static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
129 const struct nf_conntrack_zone *zone, int dir)
deedb590
DB		 130{
131 if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
132 return 0;
133 if (nla_put_be16(skb, attrtype, htons(zone->id)))
134 goto nla_put_failure;
135 return 0;
136
137nla_put_failure:
138 return -1;
139}
140
4054ff45 141static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 142{
cc1eb431
DM		 143 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
144 goto nla_put_failure;
c1d10adb
PNA		 145 return 0;
146
df6fb868 147nla_put_failure:
c1d10adb
PNA		 148 return -1;
149}
150
4054ff45 151static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 152{
d0b35b93 153 long timeout = nf_ct_expires(ct) / HZ;
601e68e1 154
cc1eb431
DM		 155 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
156 goto nla_put_failure;
c1d10adb
PNA		 157 return 0;
158
df6fb868 159nla_put_failure:
c1d10adb
PNA		 160 return -1;
161}
162
4054ff45 163static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 164{
b3480fe0 165 const struct nf_conntrack_l4proto *l4proto;
df6fb868 166 struct nlattr *nest_proto;
c1d10adb
PNA		 167 int ret;
168
528a3a6f
PNA		 169 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
170 if (!l4proto->to_nlattr)
c1d10adb 171 return 0;
601e68e1 172
df6fb868
PM		 173 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
174 if (!nest_proto)
175 goto nla_put_failure;
c1d10adb 176
fdf70832 177 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 178
df6fb868 179 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 180
181 return ret;
182
df6fb868 183nla_put_failure:
c1d10adb
PNA		 184 return -1;
185}
186
4054ff45
PNA		 187static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
188 const struct nf_conn *ct)
c1d10adb 189{
df6fb868 190 struct nlattr *nest_helper;
dc808fe2 191 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 192 struct nf_conntrack_helper *helper;
c1d10adb 193
3c158f7f 194 if (!help)
c1d10adb 195 return 0;
601e68e1 196
3c158f7f
PM		 197 helper = rcu_dereference(help->helper);
198 if (!helper)
199 goto out;
200
df6fb868
PM		 201 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
202 if (!nest_helper)
203 goto nla_put_failure;
cc1eb431
DM		 204 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
205 goto nla_put_failure;
c1d10adb 206
fdf70832
PM		 207 if (helper->to_nlattr)
208 helper->to_nlattr(skb, ct);
c1d10adb 209
df6fb868 210 nla_nest_end(skb, nest_helper);
3c158f7f 211out:
c1d10adb
PNA		 212 return 0;
213
df6fb868 214nla_put_failure:
c1d10adb
PNA		 215 return -1;
216}
217
bb5cf80e 218static int
4542fa47
HE		 219dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
220 enum ip_conntrack_dir dir, int type)
c1d10adb 221{
4542fa47
HE		 222 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
223 struct nf_conn_counter *counter = acct->counter;
df6fb868 224 struct nlattr *nest_count;
4542fa47 225 u64 pkts, bytes;
c1d10adb 226
4542fa47
HE		 227 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
228 pkts = atomic64_xchg(&counter[dir].packets, 0);
229 bytes = atomic64_xchg(&counter[dir].bytes, 0);
230 } else {
231 pkts = atomic64_read(&counter[dir].packets);
232 bytes = atomic64_read(&counter[dir].bytes);
233 }
234
235 nest_count = nla_nest_start(skb, attr | NLA_F_NESTED);
df6fb868
PM		 236 if (!nest_count)
237 goto nla_put_failure;
238
b46f6ded
ND		 239 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
240 CTA_COUNTERS_PAD) ||
241 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
242 CTA_COUNTERS_PAD))
cc1eb431 243 goto nla_put_failure;
c1d10adb 244
df6fb868 245 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 246
247 return 0;
248
df6fb868 249nla_put_failure:
c1d10adb
PNA		 250 return -1;
251}
c1d10adb 252
80e60e67 253static int
4542fa47 254ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
80e60e67 255{
4542fa47 256 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
80e60e67 257
80e60e67
PNA		 258 if (!acct)
259 return 0;
260
4542fa47
HE		 261 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
262 return -1;
263 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
264 return -1;
265
266 return 0;
80e60e67
PNA		 267}
268
a992ca2a
PNA		 269static int
270ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
271{
272 struct nlattr *nest_count;
273 const struct nf_conn_tstamp *tstamp;
274
275 tstamp = nf_conn_tstamp_find(ct);
276 if (!tstamp)
277 return 0;
278
279 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
280 if (!nest_count)
281 goto nla_put_failure;
282
b46f6ded
ND		 283 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
284 CTA_TIMESTAMP_PAD) ||
cc1eb431 285 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
b46f6ded
ND		 286 cpu_to_be64(tstamp->stop),
287 CTA_TIMESTAMP_PAD)))
cc1eb431 288 goto nla_put_failure;
a992ca2a
PNA		 289 nla_nest_end(skb, nest_count);
290
291 return 0;
292
293nla_put_failure:
294 return -1;
295}
296
c1d10adb 297#ifdef CONFIG_NF_CONNTRACK_MARK
4054ff45 298static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 299{
cc1eb431
DM		 300 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
301 goto nla_put_failure;
c1d10adb
PNA		 302 return 0;
303
df6fb868 304nla_put_failure:
c1d10adb
PNA		 305 return -1;
306}
307#else
308#define ctnetlink_dump_mark(a, b) (0)
309#endif
310
37fccd85 311#ifdef CONFIG_NF_CONNTRACK_SECMARK
4054ff45 312static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 313{
1cc63249
EP		 314 struct nlattr *nest_secctx;
315 int len, ret;
316 char *secctx;
317
318 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
319 if (ret)
cba85b53 320 return 0;
1cc63249
EP		 321
322 ret = -1;
323 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
324 if (!nest_secctx)
325 goto nla_put_failure;
37fccd85 326
cc1eb431
DM		 327 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
328 goto nla_put_failure;
1cc63249
EP		 329 nla_nest_end(skb, nest_secctx);
330
331 ret = 0;
37fccd85 332nla_put_failure:
1cc63249
EP		 333 security_release_secctx(secctx, len);
334 return ret;
37fccd85
PNA		 335}
336#else
1cc63249 337#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 338#endif
339
0ceabd83 340#ifdef CONFIG_NF_CONNTRACK_LABELS
4a96300c 341static inline int ctnetlink_label_size(const struct nf_conn *ct)
0ceabd83
FW		 342{
343 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
344
345 if (!labels)
346 return 0;
23014011 347 return nla_total_size(sizeof(labels->bits));
0ceabd83
FW		 348}
349
350static int
351ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
352{
353 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
23014011 354 unsigned int i;
0ceabd83
FW		 355
356 if (!labels)
357 return 0;
358
0ceabd83
FW		 359 i = 0;
360 do {
361 if (labels->bits[i] != 0)
23014011
FW		 362 return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
363 labels->bits);
0ceabd83 364 i++;
23014011 365 } while (i < ARRAY_SIZE(labels->bits));
0ceabd83
FW		 366
367 return 0;
368}
369#else
370#define ctnetlink_dump_labels(a, b) (0)
371#define ctnetlink_label_size(a) (0)
372#endif
373
0f417ce9
PNA		 374#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
375
4054ff45 376static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
0f417ce9
PNA		 377{
378 struct nlattr *nest_parms;
379
380 if (!(ct->status & IPS_EXPECTED))
381 return 0;
382
383 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
384 if (!nest_parms)
385 goto nla_put_failure;
386 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
387 goto nla_put_failure;
388 nla_nest_end(skb, nest_parms);
389
390 return 0;
391
392nla_put_failure:
393 return -1;
394}
395
bb5cf80e 396static int
41d73ec0 397dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
13eae15a 398{
13eae15a
PNA		 399 struct nlattr *nest_parms;
400
401 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
402 if (!nest_parms)
403 goto nla_put_failure;
404
41d73ec0
PM		 405 if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
406 htonl(seq->correction_pos)) ||
407 nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
408 htonl(seq->offset_before)) ||
409 nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
410 htonl(seq->offset_after)))
cc1eb431 411 goto nla_put_failure;
13eae15a
PNA		 412
413 nla_nest_end(skb, nest_parms);
414
415 return 0;
416
417nla_put_failure:
418 return -1;
419}
420
64f3967c 421static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, struct nf_conn *ct)
13eae15a 422{
41d73ec0
PM		 423 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
424 struct nf_ct_seqadj *seq;
13eae15a 425
41d73ec0 426 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
13eae15a
PNA		 427 return 0;
428
64f3967c 429 spin_lock_bh(&ct->lock);
41d73ec0
PM		 430 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
431 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
64f3967c 432 goto err;
13eae15a 433
41d73ec0
PM		 434 seq = &seqadj->seq[IP_CT_DIR_REPLY];
435 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
64f3967c 436 goto err;
13eae15a 437
64f3967c 438 spin_unlock_bh(&ct->lock);
13eae15a 439 return 0;
64f3967c
LZ		 440err:
441 spin_unlock_bh(&ct->lock);
442 return -1;
13eae15a 443}
13eae15a 444
4054ff45 445static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 446{
cc1eb431
DM		 447 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
448 goto nla_put_failure;
c1d10adb
PNA		 449 return 0;
450
df6fb868 451nla_put_failure:
c1d10adb
PNA		 452 return -1;
453}
454
4054ff45 455static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 456{
cc1eb431
DM		 457 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
458 goto nla_put_failure;
c1d10adb
PNA		 459 return 0;
460
df6fb868 461nla_put_failure:
c1d10adb
PNA		 462 return -1;
463}
464
c1d10adb 465static int
15e47304 466ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
80e60e67 467 struct nf_conn *ct)
c1d10adb 468{
308ac914 469 const struct nf_conntrack_zone *zone;
c1d10adb
PNA		 470 struct nlmsghdr *nlh;
471 struct nfgenmsg *nfmsg;
df6fb868 472 struct nlattr *nest_parms;
15e47304 473 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c1d10adb 474
dedb67c4 475 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW);
15e47304 476 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 477 if (nlh == NULL)
478 goto nlmsg_failure;
c1d10adb 479
96bcf938 480 nfmsg = nlmsg_data(nlh);
5e8fbe2a 481 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 482 nfmsg->version = NFNETLINK_V0;
483 nfmsg->res_id = 0;
484
deedb590
DB		 485 zone = nf_ct_zone(ct);
486
df6fb868
PM		 487 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
488 if (!nest_parms)
489 goto nla_put_failure;
f2f3e38c 490 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 491 goto nla_put_failure;
deedb590
DB		 492 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
493 NF_CT_ZONE_DIR_ORIG) < 0)
494 goto nla_put_failure;
df6fb868 495 nla_nest_end(skb, nest_parms);
601e68e1 496
df6fb868
PM		 497 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
498 if (!nest_parms)
499 goto nla_put_failure;
f2f3e38c 500 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 501 goto nla_put_failure;
deedb590
DB		 502 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
503 NF_CT_ZONE_DIR_REPL) < 0)
504 goto nla_put_failure;
df6fb868 505 nla_nest_end(skb, nest_parms);
c1d10adb 506
deedb590
DB		 507 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
508 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 509 goto nla_put_failure;
ef00f89f 510
c1d10adb
PNA		 511 if (ctnetlink_dump_status(skb, ct) < 0 ||
512 ctnetlink_dump_timeout(skb, ct) < 0 ||
4542fa47 513 ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 514 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 515 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
516 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
517 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 518 ctnetlink_dump_secctx(skb, ct) < 0 ||
0ceabd83 519 ctnetlink_dump_labels(skb, ct) < 0 ||
c1d10adb 520 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 521 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 522 ctnetlink_dump_master(skb, ct) < 0 ||
41d73ec0 523 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
df6fb868 524 goto nla_put_failure;
c1d10adb 525
96bcf938 526 nlmsg_end(skb, nlh);
c1d10adb
PNA		 527 return skb->len;
528
529nlmsg_failure:
df6fb868 530nla_put_failure:
96bcf938 531 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 532 return -1;
533}
534
8252fcea 535#if defined(CONFIG_NETFILTER_NETLINK_GLUE_CT) || defined(CONFIG_NF_CONNTRACK_EVENTS)
5caaed15 536static size_t ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4 537{
b3480fe0
FW		 538 const struct nf_conntrack_l3proto *l3proto;
539 const struct nf_conntrack_l4proto *l4proto;
5caaed15 540 size_t len, len4 = 0;
03b64f51 541
03b64f51 542 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
0d035100
FW		 543 len = l3proto->nla_size;
544 len *= 3u; /* ORIG, REPLY, MASTER */
03b64f51
PNA		 545
546 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
547 len += l4proto->nla_size;
5caaed15
FW		 548 if (l4proto->nlattr_tuple_size) {
549 len4 = l4proto->nlattr_tuple_size();
550 len4 *= 3u; /* ORIG, REPLY, MASTER */
551 }
03b64f51 552
5caaed15 553 return len + len4;
03b64f51 554}
8252fcea 555#endif
03b64f51 556
4a96300c 557static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
d26e6a02
JP		 558{
559 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
560 return 0;
561 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
b46f6ded
ND		 562 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
563 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
d26e6a02
JP		 564 ;
565}
566
4a96300c 567static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 568{
cba85b53
PNA		 569#ifdef CONFIG_NF_CONNTRACK_SECMARK
570 int len, ret;
1cc63249 571
cba85b53
PNA		 572 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
573 if (ret)
574 return 0;
1cc63249 575
cba85b53
PNA		 576 return nla_total_size(0) /* CTA_SECCTX */
577 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
578#else
579 return 0;
1cc63249 580#endif
cba85b53 581}
1cc63249 582
4a96300c 583static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
a992ca2a
PNA		 584{
585#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
586 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
587 return 0;
b46f6ded 588 return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
a992ca2a
PNA		 589#else
590 return 0;
591#endif
592}
593
4054ff45
PNA		 594#ifdef CONFIG_NF_CONNTRACK_EVENTS
595static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
03b64f51
PNA		 596{
597 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
598 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
599 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
600 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
601 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
602 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
603 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
f7b13e43 604 + ctnetlink_acct_size(ct)
a992ca2a 605 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 606 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
607 + nla_total_size(0) /* CTA_PROTOINFO */
608 + nla_total_size(0) /* CTA_HELP */
609 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 610 + ctnetlink_secctx_size(ct)
d271e8bd 611#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 612 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
613 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 614#endif
615#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 616 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 617#endif
618#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 619 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
d271e8bd 620#endif
03b64f51 621 + ctnetlink_proto_size(ct)
0ceabd83 622 + ctnetlink_label_size(ct)
03b64f51 623 ;
2732c4e4
HE		 624}
625
e34d5c1a
PNA		 626static int
627ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 628{
308ac914 629 const struct nf_conntrack_zone *zone;
9592a5c0 630 struct net *net;
c1d10adb
PNA		 631 struct nlmsghdr *nlh;
632 struct nfgenmsg *nfmsg;
df6fb868 633 struct nlattr *nest_parms;
19abb7b0 634 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 635 struct sk_buff *skb;
636 unsigned int type;
c1d10adb 637 unsigned int flags = 0, group;
dd7669a9 638 int err;
c1d10adb 639
a0891aa6 640 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 641 type = IPCTNL_MSG_CT_DELETE;
642 group = NFNLGRP_CONNTRACK_DESTROY;
04b80cea 643 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 644 type = IPCTNL_MSG_CT_NEW;
645 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 646 group = NFNLGRP_CONNTRACK_NEW;
04b80cea 647 } else if (events) {
c1d10adb
PNA		 648 type = IPCTNL_MSG_CT_NEW;
649 group = NFNLGRP_CONNTRACK_UPDATE;
650 } else
e34d5c1a 651 return 0;
a2427692 652
9592a5c0
AD		 653 net = nf_ct_net(ct);
654 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 655 return 0;
a2427692 656
03b64f51
PNA		 657 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
658 if (skb == NULL)
150ace0d 659 goto errout;
c1d10adb 660
dedb67c4 661 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type);
15e47304 662 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 663 if (nlh == NULL)
664 goto nlmsg_failure;
c1d10adb 665
96bcf938 666 nfmsg = nlmsg_data(nlh);
5e8fbe2a 667 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 668 nfmsg->version = NFNETLINK_V0;
669 nfmsg->res_id = 0;
670
deedb590
DB		 671 zone = nf_ct_zone(ct);
672
df6fb868
PM		 673 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
674 if (!nest_parms)
675 goto nla_put_failure;
f2f3e38c 676 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 677 goto nla_put_failure;
deedb590
DB		 678 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
679 NF_CT_ZONE_DIR_ORIG) < 0)
680 goto nla_put_failure;
df6fb868 681 nla_nest_end(skb, nest_parms);
601e68e1 682
df6fb868
PM		 683 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
684 if (!nest_parms)
685 goto nla_put_failure;
f2f3e38c 686 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 687 goto nla_put_failure;
deedb590
DB		 688 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
689 NF_CT_ZONE_DIR_REPL) < 0)
690 goto nla_put_failure;
df6fb868 691 nla_nest_end(skb, nest_parms);
c1d10adb 692
deedb590
DB		 693 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
694 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 695 goto nla_put_failure;
ef00f89f 696
1eedf699
EL		 697 if (ctnetlink_dump_id(skb, ct) < 0)
698 goto nla_put_failure;
699
e57dce60
FH		 700 if (ctnetlink_dump_status(skb, ct) < 0)
701 goto nla_put_failure;
702
a0891aa6 703 if (events & (1 << IPCT_DESTROY)) {
4542fa47 704 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 705 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 706 goto nla_put_failure;
7b621c1e 707 } else {
7b621c1e 708 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 709 goto nla_put_failure;
7b621c1e 710
a0891aa6 711 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 712 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 713 goto nla_put_failure;
7b621c1e 714
a0891aa6 715 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 716 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 717 goto nla_put_failure;
7b621c1e 718
ff660c80 719#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 720 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 721 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 722 goto nla_put_failure;
ff660c80 723#endif
0ceabd83
FW		 724 if (events & (1 << IPCT_LABEL) &&
725 ctnetlink_dump_labels(skb, ct) < 0)
726 goto nla_put_failure;
7b621c1e 727
a0891aa6 728 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 729 ctnetlink_dump_master(skb, ct) < 0)
730 goto nla_put_failure;
731
41d73ec0
PM		 732 if (events & (1 << IPCT_SEQADJ) &&
733 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
13eae15a 734 goto nla_put_failure;
7b621c1e 735 }
b9a37e0c 736
a83099a6 737#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 738 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 739 && ctnetlink_dump_mark(skb, ct) < 0)
740 goto nla_put_failure;
741#endif
96bcf938 742 nlmsg_end(skb, nlh);
15e47304 743 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 744 GFP_ATOMIC);
dd7669a9
PNA		 745 if (err == -ENOBUFS || err == -EAGAIN)
746 return -ENOBUFS;
747
e34d5c1a 748 return 0;
c1d10adb 749
df6fb868 750nla_put_failure:
96bcf938 751 nlmsg_cancel(skb, nlh);
528a3a6f 752nlmsg_failure:
c1d10adb 753 kfree_skb(skb);
150ace0d 754errout:
37b7ef72
PNA		 755 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
756 return -ENOBUFS;
757
e34d5c1a 758 return 0;
c1d10adb
PNA		 759}
760#endif /* CONFIG_NF_CONNTRACK_EVENTS */
761
762static int ctnetlink_done(struct netlink_callback *cb)
763{
89f2e218
PM		 764 if (cb->args[1])
765 nf_ct_put((struct nf_conn *)cb->args[1]);
397304b5 766 kfree(cb->data);
c1d10adb
PNA		 767 return 0;
768}
769
866476f3 770struct ctnetlink_filter {
0f298a28
PNA		 771 struct {
772 u_int32_t val;
773 u_int32_t mask;
774 } mark;
775};
776
866476f3
KE		 777static struct ctnetlink_filter *
778ctnetlink_alloc_filter(const struct nlattr * const cda[])
779{
780#ifdef CONFIG_NF_CONNTRACK_MARK
781 struct ctnetlink_filter *filter;
782
783 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
784 if (filter == NULL)
785 return ERR_PTR(-ENOMEM);
786
787 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
788 filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
789
790 return filter;
791#else
792 return ERR_PTR(-EOPNOTSUPP);
793#endif
794}
795
796static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
797{
798 struct ctnetlink_filter *filter = data;
799
800 if (filter == NULL)
801 return 1;
802
803#ifdef CONFIG_NF_CONNTRACK_MARK
804 if ((ct->mark & filter->mark.mask) == filter->mark.val)
805 return 1;
806#endif
807
808 return 0;
809}
810
c1d10adb
PNA		 811static int
812ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
813{
9592a5c0 814 struct net *net = sock_net(skb->sk);
89f2e218 815 struct nf_conn *ct, *last;
c1d10adb 816 struct nf_conntrack_tuple_hash *h;
ea781f19 817 struct hlist_nulls_node *n;
96bcf938 818 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 819 u_int8_t l3proto = nfmsg->nfgen_family;
2344d64e
FW		 820 struct nf_conn *nf_ct_evict[8];
821 int res, i;
93bb0ceb
JDB		 822 spinlock_t *lockp;
823
d205dc40 824 last = (struct nf_conn *)cb->args[1];
2344d64e 825 i = 0;
93bb0ceb
JDB		 826
827 local_bh_disable();
56d52d48 828 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
89f2e218 829restart:
2344d64e
FW		 830 while (i) {
831 i--;
832 if (nf_ct_should_gc(nf_ct_evict[i]))
833 nf_ct_kill(nf_ct_evict[i]);
834 nf_ct_put(nf_ct_evict[i]);
835 }
836
93bb0ceb 837 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
b16c2919 838 nf_conntrack_lock(lockp);
56d52d48 839 if (cb->args[0] >= nf_conntrack_htable_size) {
93bb0ceb
JDB		 840 spin_unlock(lockp);
841 goto out;
842 }
56d52d48
FW		 843 hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
844 hnnode) {
5b1158e9 845 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 846 continue;
847 ct = nf_ct_tuplehash_to_ctrack(h);
2344d64e
FW		 848 if (nf_ct_is_expired(ct)) {
849 if (i < ARRAY_SIZE(nf_ct_evict) &&
850 atomic_inc_not_zero(&ct->ct_general.use))
851 nf_ct_evict[i++] = ct;
852 continue;
853 }
854
e0c7d472
FW		 855 if (!net_eq(net, nf_ct_net(ct)))
856 continue;
857
87711cb8
PNA		 858 /* Dump entries of a given L3 protocol number.
859 * If it is not specified, ie. l3proto == 0,
860 * then dump everything. */
5e8fbe2a 861 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 862 continue;
d205dc40
PM		 863 if (cb->args[1]) {
864 if (ct != last)
13ee6ac5 865 continue;
d205dc40 866 cb->args[1] = 0;
89f2e218 867 }
866476f3 868 if (!ctnetlink_filter_match(ct, cb->data))
0f298a28 869 continue;
866476f3 870
3b988ece
HS		 871 rcu_read_lock();
872 res =
15e47304 873 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 874 cb->nlh->nlmsg_seq,
875 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
876 ct);
877 rcu_read_unlock();
878 if (res < 0) {
c71caf41 879 nf_conntrack_get(&ct->ct_general);
89f2e218 880 cb->args[1] = (unsigned long)ct;
93bb0ceb 881 spin_unlock(lockp);
c1d10adb 882 goto out;
89f2e218
PM		 883 }
884 }
93bb0ceb 885 spin_unlock(lockp);
d205dc40 886 if (cb->args[1]) {
89f2e218
PM		 887 cb->args[1] = 0;
888 goto restart;
c1d10adb
PNA		 889 }
890 }
89f2e218 891out:
93bb0ceb 892 local_bh_enable();
fefa9267
LZ		 893 if (last) {
894 /* nf ct hash resize happened, now clear the leftover. */
895 if ((struct nf_conn *)cb->args[1] == last)
896 cb->args[1] = 0;
897
d205dc40 898 nf_ct_put(last);
fefa9267 899 }
c1d10adb 900
2344d64e
FW		 901 while (i) {
902 i--;
903 if (nf_ct_should_gc(nf_ct_evict[i]))
904 nf_ct_kill(nf_ct_evict[i]);
905 nf_ct_put(nf_ct_evict[i]);
906 }
907
c1d10adb
PNA		 908 return skb->len;
909}
910
4054ff45
PNA		 911static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
912 struct nf_conntrack_tuple *tuple)
c1d10adb 913{
df6fb868 914 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 915 struct nf_conntrack_l3proto *l3proto;
916 int ret = 0;
917
fceb6435 918 ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL, NULL);
130ffbc2
DB		 919 if (ret < 0)
920 return ret;
c1d10adb 921
cd91566e
FW		 922 rcu_read_lock();
923 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 924
f73e924c
PM		 925 if (likely(l3proto->nlattr_to_tuple)) {
926 ret = nla_validate_nested(attr, CTA_IP_MAX,
fceb6435 927 l3proto->nla_policy, NULL);
f73e924c
PM		 928 if (ret == 0)
929 ret = l3proto->nlattr_to_tuple(tb, tuple);
930 }
c1d10adb 931
cd91566e 932 rcu_read_unlock();
c1d10adb 933
c1d10adb
PNA		 934 return ret;
935}
936
f73e924c
PM		 937static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
938 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 939};
940
4054ff45
PNA		 941static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
942 struct nf_conntrack_tuple *tuple)
c1d10adb 943{
b3480fe0 944 const struct nf_conntrack_l4proto *l4proto;
df6fb868 945 struct nlattr *tb[CTA_PROTO_MAX+1];
c1d10adb
PNA		 946 int ret = 0;
947
fceb6435
JB		 948 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy,
949 NULL);
f73e924c
PM		 950 if (ret < 0)
951 return ret;
c1d10adb 952
df6fb868 953 if (!tb[CTA_PROTO_NUM])
c1d10adb 954 return -EINVAL;
77236b6e 955 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 956
cd91566e
FW		 957 rcu_read_lock();
958 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 959
f73e924c
PM		 960 if (likely(l4proto->nlattr_to_tuple)) {
961 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
fceb6435 962 l4proto->nla_policy, NULL);
f73e924c
PM		 963 if (ret == 0)
964 ret = l4proto->nlattr_to_tuple(tb, tuple);
965 }
c1d10adb 966
cd91566e 967 rcu_read_unlock();
601e68e1 968
c1d10adb
PNA		 969 return ret;
970}
971
deedb590
DB		 972static int
973ctnetlink_parse_zone(const struct nlattr *attr,
974 struct nf_conntrack_zone *zone)
975{
5e8018fc
DB		 976 nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
977 NF_CT_DEFAULT_ZONE_DIR, 0);
deedb590
DB		 978#ifdef CONFIG_NF_CONNTRACK_ZONES
979 if (attr)
980 zone->id = ntohs(nla_get_be16(attr));
981#else
982 if (attr)
983 return -EOPNOTSUPP;
984#endif
985 return 0;
986}
987
988static int
989ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
990 struct nf_conntrack_zone *zone)
991{
992 int ret;
993
994 if (zone->id != NF_CT_DEFAULT_ZONE_ID)
995 return -EINVAL;
996
997 ret = ctnetlink_parse_zone(attr, zone);
998 if (ret < 0)
999 return ret;
1000
1001 if (type == CTA_TUPLE_REPLY)
1002 zone->dir = NF_CT_ZONE_DIR_REPL;
1003 else
1004 zone->dir = NF_CT_ZONE_DIR_ORIG;
1005
1006 return 0;
1007}
1008
d0b0268f
PM		 1009static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
1010 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
1011 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
deedb590 1012 [CTA_TUPLE_ZONE] = { .type = NLA_U16 },
d0b0268f
PM		 1013};
1014
bb5cf80e 1015static int
39938324 1016ctnetlink_parse_tuple(const struct nlattr * const cda[],
a2b7cbdd
MK		 1017 struct nf_conntrack_tuple *tuple, u32 type,
1018 u_int8_t l3num, struct nf_conntrack_zone *zone)
c1d10adb 1019{
df6fb868 1020 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 1021 int err;
1022
c1d10adb
PNA		 1023 memset(tuple, 0, sizeof(*tuple));
1024
fceb6435
JB		 1025 err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy,
1026 NULL);
130ffbc2
DB		 1027 if (err < 0)
1028 return err;
c1d10adb 1029
df6fb868 1030 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 1031 return -EINVAL;
1032
1033 tuple->src.l3num = l3num;
1034
df6fb868 1035 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 1036 if (err < 0)
1037 return err;
1038
df6fb868 1039 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 1040 return -EINVAL;
1041
df6fb868 1042 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 1043 if (err < 0)
1044 return err;
1045
deedb590
DB		 1046 if (tb[CTA_TUPLE_ZONE]) {
1047 if (!zone)
1048 return -EINVAL;
1049
1050 err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
1051 type, zone);
1052 if (err < 0)
1053 return err;
1054 }
1055
c1d10adb
PNA		 1056 /* orig and expect tuples get DIR_ORIGINAL */
1057 if (type == CTA_TUPLE_REPLY)
1058 tuple->dst.dir = IP_CT_DIR_REPLY;
1059 else
1060 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
1061
c1d10adb
PNA		 1062 return 0;
1063}
1064
d0b0268f 1065static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 1066 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
1067 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 1068};
1069
4054ff45
PNA		 1070static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
1071 struct nlattr **helpinfo)
c1d10adb 1072{
130ffbc2 1073 int err;
df6fb868 1074 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 1075
fceb6435 1076 err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy, NULL);
130ffbc2
DB		 1077 if (err < 0)
1078 return err;
c1d10adb 1079
df6fb868 1080 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 1081 return -EINVAL;
1082
df6fb868 1083 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 1084
ae243bee
PNA		 1085 if (tb[CTA_HELP_INFO])
1086 *helpinfo = tb[CTA_HELP_INFO];
1087
c1d10adb
PNA		 1088 return 0;
1089}
1090
f73e924c 1091static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 1092 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
1093 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 1094 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 1095 [CTA_PROTOINFO] = { .type = NLA_NESTED },
1096 [CTA_HELP] = { .type = NLA_NESTED },
1097 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 1098 [CTA_TIMEOUT] = { .type = NLA_U32 },
1099 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 1100 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 1101 [CTA_NAT_DST] = { .type = NLA_NESTED },
1102 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 1103 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
1104 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 1105 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 1106 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9 1107 [CTA_LABELS] = { .type = NLA_BINARY,
d2bf2f34 1108 .len = NF_CT_LABELS_MAX_SIZE },
9b21f6a9 1109 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
d2bf2f34 1110 .len = NF_CT_LABELS_MAX_SIZE },
c1d10adb
PNA		 1111};
1112
866476f3
KE		 1113static int ctnetlink_flush_conntrack(struct net *net,
1114 const struct nlattr * const cda[],
1115 u32 portid, int report)
1116{
1117 struct ctnetlink_filter *filter = NULL;
1118
1119 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1120 filter = ctnetlink_alloc_filter(cda);
1121 if (IS_ERR(filter))
1122 return PTR_ERR(filter);
1123 }
1124
9fd6452d
FW		 1125 nf_ct_iterate_cleanup_net(net, ctnetlink_filter_match, filter,
1126 portid, report);
866476f3
KE		 1127 kfree(filter);
1128
1129 return 0;
1130}
1131
7b8002a1
PNA		 1132static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl,
1133 struct sk_buff *skb,
1134 const struct nlmsghdr *nlh,
04ba724b
PNA		 1135 const struct nlattr * const cda[],
1136 struct netlink_ext_ack *extack)
c1d10adb
PNA		 1137{
1138 struct nf_conntrack_tuple_hash *h;
1139 struct nf_conntrack_tuple tuple;
1140 struct nf_conn *ct;
96bcf938 1141 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1142 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1143 struct nf_conntrack_zone zone;
ef00f89f
PM		 1144 int err;
1145
1146 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1147 if (err < 0)
1148 return err;
c1d10adb 1149
df6fb868 1150 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1151 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1152 u3, &zone);
df6fb868 1153 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1154 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1155 u3, &zone);
c1d10adb 1156 else {
866476f3
KE		 1157 return ctnetlink_flush_conntrack(net, cda,
1158 NETLINK_CB(skb).portid,
1159 nlmsg_report(nlh));
c1d10adb
PNA		 1160 }
1161
1162 if (err < 0)
1163 return err;
1164
308ac914 1165 h = nf_conntrack_find_get(net, &zone, &tuple);
9ea8cfd6 1166 if (!h)
c1d10adb 1167 return -ENOENT;
c1d10adb
PNA		 1168
1169 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1170
df6fb868 1171 if (cda[CTA_ID]) {
77236b6e 1172 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 1173 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 1174 nf_ct_put(ct);
1175 return -ENOENT;
1176 }
601e68e1 1177 }
c1d10adb 1178
f330a7fd 1179 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh));
c1d10adb 1180 nf_ct_put(ct);
c1d10adb
PNA		 1181
1182 return 0;
1183}
1184
7b8002a1
PNA		 1185static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl,
1186 struct sk_buff *skb,
1187 const struct nlmsghdr *nlh,
04ba724b
PNA		 1188 const struct nlattr * const cda[],
1189 struct netlink_ext_ack *extack)
c1d10adb
PNA		 1190{
1191 struct nf_conntrack_tuple_hash *h;
1192 struct nf_conntrack_tuple tuple;
1193 struct nf_conn *ct;
1194 struct sk_buff *skb2 = NULL;
96bcf938 1195 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1196 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1197 struct nf_conntrack_zone zone;
ef00f89f 1198 int err;
c1d10adb 1199
80d326fa
PNA		 1200 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1201 struct netlink_dump_control c = {
1202 .dump = ctnetlink_dump_table,
1203 .done = ctnetlink_done,
1204 };
866476f3 1205
0f298a28 1206 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
866476f3 1207 struct ctnetlink_filter *filter;
0f298a28 1208
866476f3
KE		 1209 filter = ctnetlink_alloc_filter(cda);
1210 if (IS_ERR(filter))
1211 return PTR_ERR(filter);
0f298a28 1212
0f298a28
PNA		 1213 c.data = filter;
1214 }
80d326fa
PNA		 1215 return netlink_dump_start(ctnl, skb, nlh, &c);
1216 }
c1d10adb 1217
ef00f89f
PM		 1218 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1219 if (err < 0)
1220 return err;
1221
df6fb868 1222 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1223 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1224 u3, &zone);
df6fb868 1225 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1226 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1227 u3, &zone);
c1d10adb
PNA		 1228 else
1229 return -EINVAL;
1230
1231 if (err < 0)
1232 return err;
1233
308ac914 1234 h = nf_conntrack_find_get(net, &zone, &tuple);
9ea8cfd6 1235 if (!h)
c1d10adb 1236 return -ENOENT;
9ea8cfd6 1237
c1d10adb
PNA		 1238 ct = nf_ct_tuplehash_to_ctrack(h);
1239
1240 err = -ENOMEM;
96bcf938
PNA		 1241 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1242 if (skb2 == NULL) {
c1d10adb
PNA		 1243 nf_ct_put(ct);
1244 return -ENOMEM;
1245 }
c1d10adb 1246
528a3a6f 1247 rcu_read_lock();
15e47304 1248 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
80e60e67 1249 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1250 rcu_read_unlock();
c1d10adb
PNA		 1251 nf_ct_put(ct);
1252 if (err <= 0)
1253 goto free;
1254
15e47304 1255 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
c1d10adb
PNA		 1256 if (err < 0)
1257 goto out;
1258
c1d10adb
PNA		 1259 return 0;
1260
1261free:
1262 kfree_skb(skb2);
1263out:
f31e8d49
PNA		 1264 /* this avoids a loop in nfnetlink. */
1265 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1266}
1267
d871befe
PNA		 1268static int ctnetlink_done_list(struct netlink_callback *cb)
1269{
1270 if (cb->args[1])
1271 nf_ct_put((struct nf_conn *)cb->args[1]);
1272 return 0;
1273}
1274
1275static int
b7779d06 1276ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
d871befe 1277{
cd5f336f 1278 struct nf_conn *ct, *last;
d871befe
PNA		 1279 struct nf_conntrack_tuple_hash *h;
1280 struct hlist_nulls_node *n;
1281 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1282 u_int8_t l3proto = nfmsg->nfgen_family;
1283 int res;
b7779d06
JDB		 1284 int cpu;
1285 struct hlist_nulls_head *list;
1286 struct net *net = sock_net(skb->sk);
d871befe
PNA		 1287
1288 if (cb->args[2])
1289 return 0;
1290
cd5f336f
FW		 1291 last = (struct nf_conn *)cb->args[1];
1292
b7779d06
JDB		 1293 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1294 struct ct_pcpu *pcpu;
1295
1296 if (!cpu_possible(cpu))
d871befe 1297 continue;
b7779d06
JDB		 1298
1299 pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
1300 spin_lock_bh(&pcpu->lock);
b7779d06
JDB		 1301 list = dying ? &pcpu->dying : &pcpu->unconfirmed;
1302restart:
1303 hlist_nulls_for_each_entry(h, n, list, hnnode) {
1304 ct = nf_ct_tuplehash_to_ctrack(h);
1305 if (l3proto && nf_ct_l3num(ct) != l3proto)
d871befe 1306 continue;
b7779d06
JDB		 1307 if (cb->args[1]) {
1308 if (ct != last)
1309 continue;
1310 cb->args[1] = 0;
1311 }
1312 rcu_read_lock();
1313 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1314 cb->nlh->nlmsg_seq,
1315 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1316 ct);
1317 rcu_read_unlock();
1318 if (res < 0) {
cd5f336f
FW		 1319 if (!atomic_inc_not_zero(&ct->ct_general.use))
1320 continue;
266155b2 1321 cb->args[0] = cpu;
b7779d06
JDB		 1322 cb->args[1] = (unsigned long)ct;
1323 spin_unlock_bh(&pcpu->lock);
1324 goto out;
1325 }
d871befe 1326 }
b7779d06
JDB		 1327 if (cb->args[1]) {
1328 cb->args[1] = 0;
1329 goto restart;
266155b2 1330 }
b7779d06 1331 spin_unlock_bh(&pcpu->lock);
d871befe 1332 }
266155b2 1333 cb->args[2] = 1;
d871befe 1334out:
d871befe
PNA		 1335 if (last)
1336 nf_ct_put(last);
1337
1338 return skb->len;
1339}
1340
1341static int
1342ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1343{
b7779d06 1344 return ctnetlink_dump_list(skb, cb, true);
d871befe
PNA		 1345}
1346
7b8002a1
PNA		 1347static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl,
1348 struct sk_buff *skb,
1349 const struct nlmsghdr *nlh,
04ba724b
PNA		 1350 const struct nlattr * const cda[],
1351 struct netlink_ext_ack *extack)
d871befe
PNA		 1352{
1353 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1354 struct netlink_dump_control c = {
1355 .dump = ctnetlink_dump_dying,
1356 .done = ctnetlink_done_list,
1357 };
1358 return netlink_dump_start(ctnl, skb, nlh, &c);
1359 }
1360
1361 return -EOPNOTSUPP;
1362}
1363
1364static int
1365ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1366{
b7779d06 1367 return ctnetlink_dump_list(skb, cb, false);
d871befe
PNA		 1368}
1369
7b8002a1
PNA		 1370static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl,
1371 struct sk_buff *skb,
1372 const struct nlmsghdr *nlh,
04ba724b
PNA		 1373 const struct nlattr * const cda[],
1374 struct netlink_ext_ack *extack)
d871befe
PNA		 1375{
1376 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1377 struct netlink_dump_control c = {
1378 .dump = ctnetlink_dump_unconfirmed,
1379 .done = ctnetlink_done_list,
1380 };
1381 return netlink_dump_start(ctnl, skb, nlh, &c);
1382 }
1383
1384 return -EOPNOTSUPP;
1385}
1386
67671841 1387#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1388static int
1389ctnetlink_parse_nat_setup(struct nf_conn *ct,
1390 enum nf_nat_manip_type manip,
39938324 1391 const struct nlattr *attr)
e6a7d3c0
PNA		 1392{
1393 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
c7232c99 1394 int err;
e6a7d3c0
PNA		 1395
1396 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1397 if (!parse_nat_setup) {
95a5afca 1398#ifdef CONFIG_MODULES
e6a7d3c0 1399 rcu_read_unlock();
c14b78e7 1400 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1401 if (request_module("nf-nat") < 0) {
c14b78e7 1402 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1403 rcu_read_lock();
1404 return -EOPNOTSUPP;
1405 }
c14b78e7 1406 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1407 rcu_read_lock();
1408 if (nfnetlink_parse_nat_setup_hook)
1409 return -EAGAIN;
1410#endif
1411 return -EOPNOTSUPP;
1412 }
1413
c7232c99
PM		 1414 err = parse_nat_setup(ct, manip, attr);
1415 if (err == -EAGAIN) {
1416#ifdef CONFIG_MODULES
1417 rcu_read_unlock();
c14b78e7 1418 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1419 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1420 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1421 rcu_read_lock();
1422 return -EOPNOTSUPP;
1423 }
c14b78e7 1424 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1425 rcu_read_lock();
1426#else
1427 err = -EOPNOTSUPP;
1428#endif
1429 }
1430 return err;
e6a7d3c0 1431}
67671841 1432#endif
e6a7d3c0 1433
53b56da8
LZ		 1434static void
1435__ctnetlink_change_status(struct nf_conn *ct, unsigned long on,
1436 unsigned long off)
1437{
1438 unsigned int bit;
1439
1440 /* Ignore these unchangable bits */
1441 on &= ~IPS_UNCHANGEABLE_MASK;
1442 off &= ~IPS_UNCHANGEABLE_MASK;
1443
1444 for (bit = 0; bit < __IPS_MAX_BIT; bit++) {
1445 if (on & (1 << bit))
1446 set_bit(bit, &ct->status);
1447 else if (off & (1 << bit))
1448 clear_bit(bit, &ct->status);
1449 }
1450}
1451
bb5cf80e 1452static int
39938324 1453ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1454{
1455 unsigned long d;
77236b6e 1456 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1457 d = ct->status ^ status;
1458
1459 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1460 /* unchangeable */
0adf9d67 1461 return -EBUSY;
601e68e1 1462
c1d10adb
PNA		 1463 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1464 /* SEEN_REPLY bit can only be set */
0adf9d67 1465 return -EBUSY;
601e68e1 1466
c1d10adb
PNA		 1467 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1468 /* ASSURED bit can only be set */
0adf9d67 1469 return -EBUSY;
c1d10adb 1470
53b56da8 1471 __ctnetlink_change_status(ct, status, 0);
c1d10adb
PNA		 1472 return 0;
1473}
1474
e6a7d3c0 1475static int
0eba801b 1476ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1477{
1478#ifdef CONFIG_NF_NAT_NEEDED
1479 int ret;
1480
fe337ac2
FW		 1481 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1482 return 0;
1483
0eba801b
PNA		 1484 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1485 cda[CTA_NAT_DST]);
1486 if (ret < 0)
1487 return ret;
1488
1489 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1490 cda[CTA_NAT_SRC]);
1491 return ret;
e6a7d3c0 1492#else
0eba801b
PNA		 1493 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1494 return 0;
e6a7d3c0
PNA		 1495 return -EOPNOTSUPP;
1496#endif
1497}
c1d10adb 1498
4054ff45
PNA		 1499static int ctnetlink_change_helper(struct nf_conn *ct,
1500 const struct nlattr * const cda[])
c1d10adb
PNA		 1501{
1502 struct nf_conntrack_helper *helper;
dc808fe2 1503 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1504 char *helpname = NULL;
ae243bee 1505 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1506 int err;
1507
ae243bee 1508 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1509 if (err < 0)
1510 return err;
1511
f95d7a46
KC		 1512 /* don't change helper of sibling connections */
1513 if (ct->master) {
1514 /* If we try to change the helper to the same thing twice,
1515 * treat the second attempt as a no-op instead of returning
1516 * an error.
1517 */
3173d5b8
LZ		 1518 err = -EBUSY;
1519 if (help) {
1520 rcu_read_lock();
1521 helper = rcu_dereference(help->helper);
1522 if (helper && !strcmp(helper->name, helpname))
1523 err = 0;
1524 rcu_read_unlock();
1525 }
1526
1527 return err;
f95d7a46
KC		 1528 }
1529
df293bbb
YK		 1530 if (!strcmp(helpname, "")) {
1531 if (help && help->helper) {
c1d10adb
PNA		 1532 /* we had a helper before ... */
1533 nf_ct_remove_expectations(ct);
a9b3cd7f 1534 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1535 }
df293bbb
YK		 1536
1537 return 0;
c1d10adb 1538 }
601e68e1 1539
88be4c09 1540 rcu_read_lock();
794e6871
PM		 1541 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1542 nf_ct_protonum(ct));
226c0c0e 1543 if (helper == NULL) {
88be4c09 1544 rcu_read_unlock();
0adf9d67 1545 return -EOPNOTSUPP;
226c0c0e 1546 }
df293bbb 1547
ceceae1b 1548 if (help) {
ae243bee
PNA		 1549 if (help->helper == helper) {
1550 /* update private helper data if allowed. */
7be54ca4 1551 if (helper->from_nlattr)
ae243bee 1552 helper->from_nlattr(helpinfo, ct);
88be4c09 1553 err = 0;
fd7462de 1554 } else
88be4c09
LZ		 1555 err = -EBUSY;
1556 } else {
1557 /* we cannot set a helper for an existing conntrack */
1558 err = -EOPNOTSUPP;
ceceae1b 1559 }
df293bbb 1560
88be4c09
LZ		 1561 rcu_read_unlock();
1562 return err;
c1d10adb
PNA		 1563}
1564
4054ff45
PNA		 1565static int ctnetlink_change_timeout(struct nf_conn *ct,
1566 const struct nlattr * const cda[])
c1d10adb 1567{
8b1836c4 1568 u64 timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;
601e68e1 1569
8b1836c4
JE		 1570 if (timeout > INT_MAX)
1571 timeout = INT_MAX;
1572 ct->timeout = nfct_time_stamp + (u32)timeout;
c1d10adb 1573
f330a7fd
FW		 1574 if (test_bit(IPS_DYING_BIT, &ct->status))
1575 return -ETIME;
c1d10adb
PNA		 1576
1577 return 0;
1578}
1579
d0b0268f
PM		 1580static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1581 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1582 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1583 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1584};
1585
4054ff45
PNA		 1586static int ctnetlink_change_protoinfo(struct nf_conn *ct,
1587 const struct nlattr * const cda[])
c1d10adb 1588{
39938324 1589 const struct nlattr *attr = cda[CTA_PROTOINFO];
b3480fe0 1590 const struct nf_conntrack_l4proto *l4proto;
39938324 1591 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
c1d10adb
PNA		 1592 int err = 0;
1593
fceb6435
JB		 1594 err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy,
1595 NULL);
130ffbc2
DB		 1596 if (err < 0)
1597 return err;
c1d10adb 1598
cd91566e
FW		 1599 rcu_read_lock();
1600 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1601 if (l4proto->from_nlattr)
1602 err = l4proto->from_nlattr(tb, ct);
cd91566e 1603 rcu_read_unlock();
c1d10adb
PNA		 1604
1605 return err;
1606}
1607
41d73ec0
PM		 1608static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = {
1609 [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 },
1610 [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 },
1611 [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 },
d0b0268f
PM		 1612};
1613
4054ff45
PNA		 1614static int change_seq_adj(struct nf_ct_seqadj *seq,
1615 const struct nlattr * const attr)
13eae15a 1616{
130ffbc2 1617 int err;
41d73ec0 1618 struct nlattr *cda[CTA_SEQADJ_MAX+1];
13eae15a 1619
fceb6435 1620 err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy, NULL);
130ffbc2
DB		 1621 if (err < 0)
1622 return err;
13eae15a 1623
41d73ec0 1624 if (!cda[CTA_SEQADJ_CORRECTION_POS])
13eae15a
PNA		 1625 return -EINVAL;
1626
41d73ec0
PM		 1627 seq->correction_pos =
1628 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
13eae15a 1629
41d73ec0 1630 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
13eae15a
PNA		 1631 return -EINVAL;
1632
41d73ec0
PM		 1633 seq->offset_before =
1634 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
13eae15a 1635
41d73ec0 1636 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
13eae15a
PNA		 1637 return -EINVAL;
1638
41d73ec0
PM		 1639 seq->offset_after =
1640 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
13eae15a
PNA		 1641
1642 return 0;
1643}
1644
1645static int
41d73ec0
PM		 1646ctnetlink_change_seq_adj(struct nf_conn *ct,
1647 const struct nlattr * const cda[])
13eae15a 1648{
41d73ec0 1649 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
13eae15a 1650 int ret = 0;
13eae15a 1651
41d73ec0 1652 if (!seqadj)
13eae15a
PNA		 1653 return 0;
1654
64f3967c 1655 spin_lock_bh(&ct->lock);
41d73ec0
PM		 1656 if (cda[CTA_SEQ_ADJ_ORIG]) {
1657 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
1658 cda[CTA_SEQ_ADJ_ORIG]);
13eae15a 1659 if (ret < 0)
64f3967c 1660 goto err;
13eae15a 1661
53b56da8 1662 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 1663 }
1664
41d73ec0
PM		 1665 if (cda[CTA_SEQ_ADJ_REPLY]) {
1666 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
1667 cda[CTA_SEQ_ADJ_REPLY]);
13eae15a 1668 if (ret < 0)
64f3967c 1669 goto err;
13eae15a 1670
53b56da8 1671 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 1672 }
1673
64f3967c 1674 spin_unlock_bh(&ct->lock);
13eae15a 1675 return 0;
64f3967c
LZ		 1676err:
1677 spin_unlock_bh(&ct->lock);
1678 return ret;
13eae15a 1679}
13eae15a 1680
9b21f6a9
FW		 1681static int
1682ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1683{
1684#ifdef CONFIG_NF_CONNTRACK_LABELS
1685 size_t len = nla_len(cda[CTA_LABELS]);
1686 const void *mask = cda[CTA_LABELS_MASK];
1687
1688 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1689 return -EINVAL;
1690
1691 if (mask) {
1692 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1693 nla_len(cda[CTA_LABELS_MASK]) != len)
1694 return -EINVAL;
1695 mask = nla_data(cda[CTA_LABELS_MASK]);
1696 }
1697
1698 len /= sizeof(u32);
1699
1700 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1701#else
1702 return -EOPNOTSUPP;
1703#endif
1704}
1705
c1d10adb 1706static int
39938324
PM		 1707ctnetlink_change_conntrack(struct nf_conn *ct,
1708 const struct nlattr * const cda[])
c1d10adb
PNA		 1709{
1710 int err;
1711
e098360f
PNA		 1712 /* only allow NAT changes and master assignation for new conntracks */
1713 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1714 return -EOPNOTSUPP;
1715
df6fb868 1716 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1717 err = ctnetlink_change_helper(ct, cda);
1718 if (err < 0)
1719 return err;
1720 }
1721
df6fb868 1722 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1723 err = ctnetlink_change_timeout(ct, cda);
1724 if (err < 0)
1725 return err;
1726 }
1727
df6fb868 1728 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1729 err = ctnetlink_change_status(ct, cda);
1730 if (err < 0)
1731 return err;
1732 }
1733
df6fb868 1734 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1735 err = ctnetlink_change_protoinfo(ct, cda);
1736 if (err < 0)
1737 return err;
1738 }
1739
bcd1e830 1740#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1741 if (cda[CTA_MARK])
77236b6e 1742 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1743#endif
1744
41d73ec0
PM		 1745 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1746 err = ctnetlink_change_seq_adj(ct, cda);
13eae15a
PNA		 1747 if (err < 0)
1748 return err;
1749 }
41d73ec0 1750
9b21f6a9
FW		 1751 if (cda[CTA_LABELS]) {
1752 err = ctnetlink_attach_labels(ct, cda);
1753 if (err < 0)
1754 return err;
1755 }
13eae15a 1756
c1d10adb
PNA		 1757 return 0;
1758}
1759
f0a3c086 1760static struct nf_conn *
308ac914
DB		 1761ctnetlink_create_conntrack(struct net *net,
1762 const struct nf_conntrack_zone *zone,
9592a5c0 1763 const struct nlattr * const cda[],
c1d10adb 1764 struct nf_conntrack_tuple *otuple,
5faa1f4c 1765 struct nf_conntrack_tuple *rtuple,
7ec47496 1766 u8 u3)
c1d10adb
PNA		 1767{
1768 struct nf_conn *ct;
1769 int err = -EINVAL;
ceceae1b 1770 struct nf_conntrack_helper *helper;
315c34da 1771 struct nf_conn_tstamp *tstamp;
8b1836c4 1772 u64 timeout;
c1d10adb 1773
ef00f89f 1774 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1775 if (IS_ERR(ct))
f0a3c086 1776 return ERR_PTR(-ENOMEM);
c1d10adb 1777
df6fb868 1778 if (!cda[CTA_TIMEOUT])
0f5b3e85 1779 goto err1;
c1d10adb 1780
8b1836c4
JE		 1781 timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;
1782 if (timeout > INT_MAX)
1783 timeout = INT_MAX;
1784 ct->timeout = (u32)timeout + nfct_time_stamp;
c1d10adb 1785
1575e7ea 1786 rcu_read_lock();
226c0c0e 1787 if (cda[CTA_HELP]) {
29fe1b48 1788 char *helpname = NULL;
ae243bee
PNA		 1789 struct nlattr *helpinfo = NULL;
1790
1791 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1792 if (err < 0)
1793 goto err2;
226c0c0e 1794
794e6871
PM		 1795 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1796 nf_ct_protonum(ct));
226c0c0e
PNA		 1797 if (helper == NULL) {
1798 rcu_read_unlock();
1799#ifdef CONFIG_MODULES
1800 if (request_module("nfct-helper-%s", helpname) < 0) {
1801 err = -EOPNOTSUPP;
0f5b3e85 1802 goto err1;
226c0c0e
PNA		 1803 }
1804
1805 rcu_read_lock();
794e6871
PM		 1806 helper = __nf_conntrack_helper_find(helpname,
1807 nf_ct_l3num(ct),
1808 nf_ct_protonum(ct));
226c0c0e 1809 if (helper) {
226c0c0e 1810 err = -EAGAIN;
0f5b3e85 1811 goto err2;
226c0c0e
PNA		 1812 }
1813 rcu_read_unlock();
1814#endif
1815 err = -EOPNOTSUPP;
0f5b3e85 1816 goto err1;
226c0c0e
PNA		 1817 } else {
1818 struct nf_conn_help *help;
1819
1afc5679 1820 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1821 if (help == NULL) {
226c0c0e 1822 err = -ENOMEM;
0f5b3e85 1823 goto err2;
226c0c0e 1824 }
ae243bee 1825 /* set private helper data if allowed. */
7be54ca4 1826 if (helper->from_nlattr)
ae243bee 1827 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1828
1829 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1830 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1831 }
1832 } else {
1833 /* try an implicit helper assignation */
b2a15a60 1834 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1835 if (err < 0)
1836 goto err2;
1575e7ea
PNA		 1837 }
1838
0eba801b
PNA		 1839 err = ctnetlink_setup_nat(ct, cda);
1840 if (err < 0)
1841 goto err2;
e6a7d3c0 1842
a88e22ad 1843 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1844 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 1845 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017 1846 nf_ct_labels_ext_add(ct);
87e94dbc
EL		 1847 nfct_seqadj_ext_add(ct);
1848 nfct_synproxy_ext_add(ct);
c539f017 1849
a88e22ad
PNA		 1850 /* we must add conntrack extensions before confirmation. */
1851 ct->status |= IPS_CONFIRMED;
1852
1853 if (cda[CTA_STATUS]) {
1854 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1855 if (err < 0)
1856 goto err2;
bbb3357d 1857 }
c1d10adb 1858
41d73ec0
PM		 1859 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1860 err = ctnetlink_change_seq_adj(ct, cda);
0f5b3e85
PM		 1861 if (err < 0)
1862 goto err2;
c969aa7d 1863 }
c969aa7d 1864
e5fc9e7a 1865 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 1866 if (cda[CTA_PROTOINFO]) {
c1d10adb 1867 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 1868 if (err < 0)
1869 goto err2;
c1d10adb
PNA		 1870 }
1871
bcd1e830 1872#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1873 if (cda[CTA_MARK])
77236b6e 1874 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1875#endif
1876
5faa1f4c 1877 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 1878 if (cda[CTA_TUPLE_MASTER]) {
1879 struct nf_conntrack_tuple master;
1880 struct nf_conntrack_tuple_hash *master_h;
1881 struct nf_conn *master_ct;
1882
deedb590
DB		 1883 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
1884 u3, NULL);
7ec47496 1885 if (err < 0)
0f5b3e85 1886 goto err2;
7ec47496 1887
ef00f89f 1888 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 1889 if (master_h == NULL) {
1890 err = -ENOENT;
0f5b3e85 1891 goto err2;
7ec47496
PNA		 1892 }
1893 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 1894 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 1895 ct->master = master_ct;
f2a89004 1896 }
315c34da
PNA		 1897 tstamp = nf_conn_tstamp_find(ct);
1898 if (tstamp)
d2de875c 1899 tstamp->start = ktime_get_real_ns();
5faa1f4c 1900
7d367e06
JK		 1901 err = nf_conntrack_hash_check_insert(ct);
1902 if (err < 0)
1903 goto err2;
1904
58a3c9bb 1905 rcu_read_unlock();
dafc741c 1906
f0a3c086 1907 return ct;
c1d10adb 1908
0f5b3e85
PM		 1909err2:
1910 rcu_read_unlock();
1911err1:
c1d10adb 1912 nf_conntrack_free(ct);
f0a3c086 1913 return ERR_PTR(err);
c1d10adb
PNA		 1914}
1915
7b8002a1
PNA		 1916static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
1917 struct sk_buff *skb,
1918 const struct nlmsghdr *nlh,
04ba724b
PNA		 1919 const struct nlattr * const cda[],
1920 struct netlink_ext_ack *extack)
c1d10adb
PNA		 1921{
1922 struct nf_conntrack_tuple otuple, rtuple;
1923 struct nf_conntrack_tuple_hash *h = NULL;
96bcf938 1924 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
7d367e06 1925 struct nf_conn *ct;
c1d10adb 1926 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1927 struct nf_conntrack_zone zone;
ef00f89f
PM		 1928 int err;
1929
1930 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1931 if (err < 0)
1932 return err;
c1d10adb 1933
df6fb868 1934 if (cda[CTA_TUPLE_ORIG]) {
deedb590
DB		 1935 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
1936 u3, &zone);
c1d10adb
PNA		 1937 if (err < 0)
1938 return err;
1939 }
1940
df6fb868 1941 if (cda[CTA_TUPLE_REPLY]) {
deedb590
DB		 1942 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
1943 u3, &zone);
c1d10adb
PNA		 1944 if (err < 0)
1945 return err;
1946 }
1947
df6fb868 1948 if (cda[CTA_TUPLE_ORIG])
308ac914 1949 h = nf_conntrack_find_get(net, &zone, &otuple);
df6fb868 1950 else if (cda[CTA_TUPLE_REPLY])
308ac914 1951 h = nf_conntrack_find_get(net, &zone, &rtuple);
c1d10adb
PNA		 1952
1953 if (h == NULL) {
c1d10adb 1954 err = -ENOENT;
f0a3c086 1955 if (nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 1956 enum ip_conntrack_events events;
5faa1f4c 1957
442fad94
FW		 1958 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
1959 return -EINVAL;
aa0c2c68
LZ		 1960 if (otuple.dst.protonum != rtuple.dst.protonum)
1961 return -EINVAL;
442fad94 1962
308ac914 1963 ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple,
f0a3c086 1964 &rtuple, u3);
7d367e06
JK		 1965 if (IS_ERR(ct))
1966 return PTR_ERR(ct);
1967
f0a3c086 1968 err = 0;
fecc1133 1969 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
97aae0df 1970 events = 1 << IPCT_RELATED;
fecc1133 1971 else
97aae0df 1972 events = 1 << IPCT_NEW;
fecc1133 1973
9b21f6a9
FW		 1974 if (cda[CTA_LABELS] &&
1975 ctnetlink_attach_labels(ct, cda) == 0)
1976 events |= (1 << IPCT_LABEL);
1977
858b3133
PM		 1978 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1979 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1980 (1 << IPCT_HELPER) |
1981 (1 << IPCT_PROTOINFO) |
41d73ec0 1982 (1 << IPCT_SEQADJ) |
a0891aa6 1983 (1 << IPCT_MARK) | events,
15e47304 1984 ct, NETLINK_CB(skb).portid,
a0891aa6 1985 nlmsg_report(nlh));
f0a3c086 1986 nf_ct_put(ct);
7d367e06 1987 }
5faa1f4c 1988
c1d10adb
PNA		 1989 return err;
1990 }
1991 /* implicit 'else' */
1992
c1d10adb 1993 err = -EEXIST;
7d367e06 1994 ct = nf_ct_tuplehash_to_ctrack(h);
ff4ca827 1995 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
19abb7b0
PNA		 1996 err = ctnetlink_change_conntrack(ct, cda);
1997 if (err == 0) {
858b3133
PM		 1998 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1999 (1 << IPCT_ASSURED) |
a0891aa6 2000 (1 << IPCT_HELPER) |
797a7d66 2001 (1 << IPCT_LABEL) |
a0891aa6 2002 (1 << IPCT_PROTOINFO) |
41d73ec0 2003 (1 << IPCT_SEQADJ) |
a0891aa6 2004 (1 << IPCT_MARK),
15e47304 2005 ct, NETLINK_CB(skb).portid,
a0891aa6 2006 nlmsg_report(nlh));
7d367e06 2007 }
ff4ca827 2008 }
c1d10adb 2009
7d367e06 2010 nf_ct_put(ct);
c1d10adb
PNA		 2011 return err;
2012}
2013
392025f8 2014static int
15e47304 2015ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 2016 __u16 cpu, const struct ip_conntrack_stat *st)
2017{
2018 struct nlmsghdr *nlh;
2019 struct nfgenmsg *nfmsg;
15e47304 2020 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 2021
dedb67c4
PNA		 2022 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
2023 IPCTNL_MSG_CT_GET_STATS_CPU);
15e47304 2024 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2025 if (nlh == NULL)
2026 goto nlmsg_failure;
2027
2028 nfmsg = nlmsg_data(nlh);
2029 nfmsg->nfgen_family = AF_UNSPEC;
2030 nfmsg->version = NFNETLINK_V0;
2031 nfmsg->res_id = htons(cpu);
2032
8e8118f8 2033 if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
392025f8
PNA		 2034 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
2035 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
392025f8
PNA		 2036 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
2037 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
2038 htonl(st->insert_failed)) ||
2039 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
2040 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
2041 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
2042 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
2043 htonl(st->search_restart)))
2044 goto nla_put_failure;
2045
2046 nlmsg_end(skb, nlh);
2047 return skb->len;
2048
2049nla_put_failure:
2050nlmsg_failure:
2051 nlmsg_cancel(skb, nlh);
2052 return -1;
2053}
2054
2055static int
2056ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2057{
2058 int cpu;
2059 struct net *net = sock_net(skb->sk);
2060
2061 if (cb->args[0] == nr_cpu_ids)
2062 return 0;
2063
2064 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2065 const struct ip_conntrack_stat *st;
2066
2067 if (!cpu_possible(cpu))
2068 continue;
2069
2070 st = per_cpu_ptr(net->ct.stat, cpu);
2071 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 2072 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2073 cb->nlh->nlmsg_seq,
2074 cpu, st) < 0)
2075 break;
2076 }
2077 cb->args[0] = cpu;
2078
2079 return skb->len;
2080}
2081
7b8002a1
PNA		 2082static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl,
2083 struct sk_buff *skb,
2084 const struct nlmsghdr *nlh,
04ba724b
PNA		 2085 const struct nlattr * const cda[],
2086 struct netlink_ext_ack *extack)
392025f8
PNA		 2087{
2088 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2089 struct netlink_dump_control c = {
2090 .dump = ctnetlink_ct_stat_cpu_dump,
2091 };
2092 return netlink_dump_start(ctnl, skb, nlh, &c);
2093 }
2094
2095 return 0;
2096}
2097
2098static int
15e47304 2099ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 2100 struct net *net)
2101{
2102 struct nlmsghdr *nlh;
2103 struct nfgenmsg *nfmsg;
15e47304 2104 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 2105 unsigned int nr_conntracks = atomic_read(&net->ct.count);
2106
dedb67c4 2107 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS);
15e47304 2108 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2109 if (nlh == NULL)
2110 goto nlmsg_failure;
2111
2112 nfmsg = nlmsg_data(nlh);
2113 nfmsg->nfgen_family = AF_UNSPEC;
2114 nfmsg->version = NFNETLINK_V0;
2115 nfmsg->res_id = 0;
2116
2117 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
2118 goto nla_put_failure;
2119
2120 nlmsg_end(skb, nlh);
2121 return skb->len;
2122
2123nla_put_failure:
2124nlmsg_failure:
2125 nlmsg_cancel(skb, nlh);
2126 return -1;
2127}
2128
7b8002a1
PNA		 2129static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl,
2130 struct sk_buff *skb, const struct nlmsghdr *nlh,
04ba724b
PNA		 2131 const struct nlattr * const cda[],
2132 struct netlink_ext_ack *extack)
392025f8
PNA		 2133{
2134 struct sk_buff *skb2;
2135 int err;
2136
2137 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2138 if (skb2 == NULL)
2139 return -ENOMEM;
2140
15e47304 2141 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
392025f8
PNA		 2142 nlh->nlmsg_seq,
2143 NFNL_MSG_TYPE(nlh->nlmsg_type),
2144 sock_net(skb->sk));
2145 if (err <= 0)
2146 goto free;
2147
15e47304 2148 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
392025f8
PNA		 2149 if (err < 0)
2150 goto out;
2151
2152 return 0;
2153
2154free:
2155 kfree_skb(skb2);
2156out:
2157 /* this avoids a loop in nfnetlink. */
2158 return err == -EAGAIN ? -ENOBUFS : err;
2159}
2160
bd077937
PNA		 2161static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2162 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2163 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2164 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2165 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2166 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2167 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2168 .len = NF_CT_HELPER_NAME_LEN - 1 },
2169 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2170 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2171 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2172 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2173 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2174};
2175
2176static struct nf_conntrack_expect *
2177ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2178 struct nf_conntrack_helper *helper,
2179 struct nf_conntrack_tuple *tuple,
2180 struct nf_conntrack_tuple *mask);
2181
83f3e94d 2182#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 2183static size_t
a4b4766c 2184ctnetlink_glue_build_size(const struct nf_conn *ct)
9cb01766
PNA		 2185{
2186 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2187 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2188 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2189 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2190 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2191 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2192 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2193 + nla_total_size(0) /* CTA_PROTOINFO */
2194 + nla_total_size(0) /* CTA_HELP */
2195 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2196 + ctnetlink_secctx_size(ct)
2197#ifdef CONFIG_NF_NAT_NEEDED
2198 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2199 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2200#endif
2201#ifdef CONFIG_NF_CONNTRACK_MARK
2202 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 2203#endif
2204#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 2205 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
9cb01766
PNA		 2206#endif
2207 + ctnetlink_proto_size(ct)
2208 ;
2209}
2210
224a0597 2211static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
a4b4766c 2212 enum ip_conntrack_info *ctinfo)
b7bd1809 2213{
ab8bc7ed 2214 return nf_ct_get(skb, ctinfo);
b7bd1809
PNA		 2215}
2216
a4b4766c 2217static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
9cb01766 2218{
308ac914 2219 const struct nf_conntrack_zone *zone;
9cb01766
PNA		 2220 struct nlattr *nest_parms;
2221
deedb590
DB		 2222 zone = nf_ct_zone(ct);
2223
9cb01766
PNA		 2224 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2225 if (!nest_parms)
2226 goto nla_put_failure;
2227 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2228 goto nla_put_failure;
deedb590
DB		 2229 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2230 NF_CT_ZONE_DIR_ORIG) < 0)
2231 goto nla_put_failure;
9cb01766
PNA		 2232 nla_nest_end(skb, nest_parms);
2233
2234 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2235 if (!nest_parms)
2236 goto nla_put_failure;
2237 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2238 goto nla_put_failure;
deedb590
DB		 2239 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2240 NF_CT_ZONE_DIR_REPL) < 0)
2241 goto nla_put_failure;
9cb01766
PNA		 2242 nla_nest_end(skb, nest_parms);
2243
deedb590
DB		 2244 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
2245 NF_CT_DEFAULT_ZONE_DIR) < 0)
308ac914 2246 goto nla_put_failure;
9cb01766
PNA		 2247
2248 if (ctnetlink_dump_id(skb, ct) < 0)
2249 goto nla_put_failure;
2250
2251 if (ctnetlink_dump_status(skb, ct) < 0)
2252 goto nla_put_failure;
2253
2254 if (ctnetlink_dump_timeout(skb, ct) < 0)
2255 goto nla_put_failure;
2256
2257 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2258 goto nla_put_failure;
2259
2260 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2261 goto nla_put_failure;
2262
2263#ifdef CONFIG_NF_CONNTRACK_SECMARK
2264 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2265 goto nla_put_failure;
2266#endif
2267 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2268 goto nla_put_failure;
2269
2270 if ((ct->status & IPS_SEQ_ADJUST) &&
41d73ec0 2271 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
9cb01766
PNA		 2272 goto nla_put_failure;
2273
2274#ifdef CONFIG_NF_CONNTRACK_MARK
2275 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2276 goto nla_put_failure;
2277#endif
0ceabd83
FW		 2278 if (ctnetlink_dump_labels(skb, ct) < 0)
2279 goto nla_put_failure;
9cb01766
PNA		 2280 return 0;
2281
2282nla_put_failure:
9cb01766
PNA		 2283 return -ENOSPC;
2284}
2285
b7bd1809 2286static int
a4b4766c
KM		 2287ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
2288 enum ip_conntrack_info ctinfo,
2289 u_int16_t ct_attr, u_int16_t ct_info_attr)
b7bd1809
PNA		 2290{
2291 struct nlattr *nest_parms;
2292
2293 nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED);
2294 if (!nest_parms)
2295 goto nla_put_failure;
2296
a4b4766c 2297 if (__ctnetlink_glue_build(skb, ct) < 0)
b7bd1809
PNA		 2298 goto nla_put_failure;
2299
2300 nla_nest_end(skb, nest_parms);
2301
2302 if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
2303 goto nla_put_failure;
2304
2305 return 0;
2306
2307nla_put_failure:
2308 return -ENOSPC;
2309}
2310
a963d710
KC		 2311static int
2312ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[])
2313{
2314 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
2315 unsigned long d = ct->status ^ status;
2316
2317 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
2318 /* SEEN_REPLY bit can only be set */
2319 return -EBUSY;
2320
2321 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
2322 /* ASSURED bit can only be set */
2323 return -EBUSY;
2324
2325 /* This check is less strict than ctnetlink_change_status()
2326 * because callers often flip IPS_EXPECTED bits when sending
2327 * an NFQA_CT attribute to the kernel. So ignore the
53b56da8
LZ		 2328 * unchangeable bits but do not error out. Also user programs
2329 * are allowed to clear the bits that they are allowed to change.
a963d710 2330 */
53b56da8 2331 __ctnetlink_change_status(ct, status, ~status);
a963d710
KC		 2332 return 0;
2333}
2334
9cb01766 2335static int
a4b4766c 2336ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
9cb01766
PNA		 2337{
2338 int err;
2339
2340 if (cda[CTA_TIMEOUT]) {
2341 err = ctnetlink_change_timeout(ct, cda);
2342 if (err < 0)
2343 return err;
2344 }
2345 if (cda[CTA_STATUS]) {
a963d710 2346 err = ctnetlink_update_status(ct, cda);
9cb01766
PNA		 2347 if (err < 0)
2348 return err;
2349 }
2350 if (cda[CTA_HELP]) {
2351 err = ctnetlink_change_helper(ct, cda);
2352 if (err < 0)
2353 return err;
2354 }
9b21f6a9
FW		 2355 if (cda[CTA_LABELS]) {
2356 err = ctnetlink_attach_labels(ct, cda);
2357 if (err < 0)
2358 return err;
2359 }
9cb01766 2360#if defined(CONFIG_NF_CONNTRACK_MARK)
534473c6
FW		 2361 if (cda[CTA_MARK]) {
2362 u32 mask = 0, mark, newmark;
2363 if (cda[CTA_MARK_MASK])
2364 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2365
2366 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2367 newmark = (ct->mark & mask) ^ mark;
2368 if (newmark != ct->mark)
2369 ct->mark = newmark;
2370 }
9cb01766
PNA		 2371#endif
2372 return 0;
2373}
2374
2375static int
a4b4766c 2376ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
9cb01766
PNA		 2377{
2378 struct nlattr *cda[CTA_MAX+1];
68e035c9 2379 int ret;
9cb01766 2380
fceb6435 2381 ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy, NULL);
130ffbc2
DB		 2382 if (ret < 0)
2383 return ret;
9cb01766 2384
88be4c09 2385 return ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
9cb01766
PNA		 2386}
2387
a4b4766c
KM		 2388static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
2389 const struct nf_conn *ct,
2390 struct nf_conntrack_tuple *tuple,
2391 struct nf_conntrack_tuple *mask)
bd077937
PNA		 2392{
2393 int err;
2394
2395 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
deedb590 2396 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2397 if (err < 0)
2398 return err;
2399
2400 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
deedb590 2401 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2402}
2403
2404static int
a4b4766c
KM		 2405ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2406 u32 portid, u32 report)
bd077937
PNA		 2407{
2408 struct nlattr *cda[CTA_EXPECT_MAX+1];
2409 struct nf_conntrack_tuple tuple, mask;
b7e092c0 2410 struct nf_conntrack_helper *helper = NULL;
bd077937
PNA		 2411 struct nf_conntrack_expect *exp;
2412 int err;
2413
fceb6435
JB		 2414 err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy,
2415 NULL);
bd077937
PNA		 2416 if (err < 0)
2417 return err;
2418
a4b4766c
KM		 2419 err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
2420 ct, &tuple, &mask);
bd077937
PNA		 2421 if (err < 0)
2422 return err;
2423
2424 if (cda[CTA_EXPECT_HELP_NAME]) {
2425 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2426
2427 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2428 nf_ct_protonum(ct));
2429 if (helper == NULL)
2430 return -EOPNOTSUPP;
2431 }
2432
2433 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2434 helper, &tuple, &mask);
2435 if (IS_ERR(exp))
2436 return PTR_ERR(exp);
2437
2438 err = nf_ct_expect_related_report(exp, portid, report);
b18bcb00
LZ		 2439 nf_ct_expect_put(exp);
2440 return err;
bd077937
PNA		 2441}
2442
a4b4766c
KM		 2443static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
2444 enum ip_conntrack_info ctinfo, int diff)
b7bd1809
PNA		 2445{
2446 if (!(ct->status & IPS_NAT_MASK))
2447 return;
2448
2449 nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
2450}
2451
a4b4766c
KM		 2452static struct nfnl_ct_hook ctnetlink_glue_hook = {
2453 .get_ct = ctnetlink_glue_get_ct,
2454 .build_size = ctnetlink_glue_build_size,
2455 .build = ctnetlink_glue_build,
2456 .parse = ctnetlink_glue_parse,
2457 .attach_expect = ctnetlink_glue_attach_expect,
2458 .seq_adjust = ctnetlink_glue_seqadj,
9cb01766 2459};
83f3e94d 2460#endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
9cb01766 2461
601e68e1
YH		 2462/***********************************************************************
2463 * EXPECT
2464 ***********************************************************************/
c1d10adb 2465
4054ff45
PNA		 2466static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2467 const struct nf_conntrack_tuple *tuple,
a2b7cbdd 2468 u32 type)
c1d10adb 2469{
df6fb868 2470 struct nlattr *nest_parms;
601e68e1 2471
df6fb868
PM		 2472 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2473 if (!nest_parms)
2474 goto nla_put_failure;
c1d10adb 2475 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2476 goto nla_put_failure;
2477 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2478
2479 return 0;
2480
df6fb868 2481nla_put_failure:
c1d10adb 2482 return -1;
601e68e1 2483}
c1d10adb 2484
4054ff45
PNA		 2485static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
2486 const struct nf_conntrack_tuple *tuple,
2487 const struct nf_conntrack_tuple_mask *mask)
1cde6436 2488{
b3480fe0
FW		 2489 const struct nf_conntrack_l3proto *l3proto;
2490 const struct nf_conntrack_l4proto *l4proto;
d4156e8c 2491 struct nf_conntrack_tuple m;
df6fb868 2492 struct nlattr *nest_parms;
b3480fe0 2493 int ret;
d4156e8c
PM		 2494
2495 memset(&m, 0xFF, sizeof(m));
d4156e8c 2496 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 2497 m.src.u.all = mask->src.u.all;
2498 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2499
df6fb868
PM		 2500 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2501 if (!nest_parms)
2502 goto nla_put_failure;
1cde6436 2503
3b988ece 2504 rcu_read_lock();
528a3a6f 2505 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 2506 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 2507 if (ret >= 0) {
2508 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2509 tuple->dst.protonum);
d4156e8c 2510 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2511 }
2512 rcu_read_unlock();
2513
1cde6436 2514 if (unlikely(ret < 0))
df6fb868 2515 goto nla_put_failure;
1cde6436 2516
df6fb868 2517 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2518
2519 return 0;
2520
df6fb868 2521nla_put_failure:
1cde6436
PNA		 2522 return -1;
2523}
2524
c7232c99
PM		 2525static const union nf_inet_addr any_addr;
2526
bb5cf80e 2527static int
c1d10adb 2528ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2529 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2530{
2531 struct nf_conn *master = exp->master;
c1216382 2532 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 2533 struct nf_conn_help *help;
076a0ca0
PNA		 2534#ifdef CONFIG_NF_NAT_NEEDED
2535 struct nlattr *nest_parms;
2536 struct nf_conntrack_tuple nat_tuple = {};
2537#endif
544d5c7d
PNA		 2538 struct nf_ct_helper_expectfn *expfn;
2539
d978e5da
PM		 2540 if (timeout < 0)
2541 timeout = 0;
c1d10adb
PNA		 2542
2543 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 2544 goto nla_put_failure;
1cde6436 2545 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 2546 goto nla_put_failure;
c1d10adb
PNA		 2547 if (ctnetlink_exp_dump_tuple(skb,
2548 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2549 CTA_EXPECT_MASTER) < 0)
df6fb868 2550 goto nla_put_failure;
601e68e1 2551
076a0ca0 2552#ifdef CONFIG_NF_NAT_NEEDED
c7232c99
PM		 2553 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2554 exp->saved_proto.all) {
076a0ca0
PNA		 2555 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2556 if (!nest_parms)
2557 goto nla_put_failure;
2558
cc1eb431
DM		 2559 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2560 goto nla_put_failure;
076a0ca0
PNA		 2561
2562 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 2563 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 2564 nat_tuple.dst.protonum = nf_ct_protonum(master);
2565 nat_tuple.src.u = exp->saved_proto;
2566
2567 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2568 CTA_EXPECT_NAT_TUPLE) < 0)
2569 goto nla_put_failure;
2570 nla_nest_end(skb, nest_parms);
2571 }
2572#endif
cc1eb431
DM		 2573 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2574 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2575 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2576 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2577 goto nla_put_failure;
bc01befd
PNA		 2578 help = nfct_help(master);
2579 if (help) {
2580 struct nf_conntrack_helper *helper;
2581
2582 helper = rcu_dereference(help->helper);
cc1eb431
DM		 2583 if (helper &&
2584 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2585 goto nla_put_failure;
bc01befd 2586 }
544d5c7d 2587 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 2588 if (expfn != NULL &&
2589 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2590 goto nla_put_failure;
c1d10adb
PNA		 2591
2592 return 0;
601e68e1 2593
df6fb868 2594nla_put_failure:
c1d10adb
PNA		 2595 return -1;
2596}
2597
2598static int
15e47304 2599ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 2600 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2601{
2602 struct nlmsghdr *nlh;
2603 struct nfgenmsg *nfmsg;
15e47304 2604 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb 2605
dedb67c4 2606 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event);
15e47304 2607 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 2608 if (nlh == NULL)
2609 goto nlmsg_failure;
c1d10adb 2610
96bcf938 2611 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2612 nfmsg->nfgen_family = exp->tuple.src.l3num;
2613 nfmsg->version = NFNETLINK_V0;
2614 nfmsg->res_id = 0;
2615
2616 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2617 goto nla_put_failure;
c1d10adb 2618
96bcf938 2619 nlmsg_end(skb, nlh);
c1d10adb
PNA		 2620 return skb->len;
2621
2622nlmsg_failure:
df6fb868 2623nla_put_failure:
96bcf938 2624 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 2625 return -1;
2626}
2627
2628#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2629static int
2630ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 2631{
9592a5c0
AD		 2632 struct nf_conntrack_expect *exp = item->exp;
2633 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 2634 struct nlmsghdr *nlh;
2635 struct nfgenmsg *nfmsg;
c1d10adb 2636 struct sk_buff *skb;
ebbf41df 2637 unsigned int type, group;
c1d10adb
PNA		 2638 int flags = 0;
2639
ebbf41df
PNA		 2640 if (events & (1 << IPEXP_DESTROY)) {
2641 type = IPCTNL_MSG_EXP_DELETE;
2642 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2643 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 2644 type = IPCTNL_MSG_EXP_NEW;
2645 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 2646 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 2647 } else
e34d5c1a 2648 return 0;
c1d10adb 2649
ebbf41df 2650 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 2651 return 0;
b3a27bfb 2652
96bcf938
PNA		 2653 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2654 if (skb == NULL)
150ace0d 2655 goto errout;
c1d10adb 2656
dedb67c4 2657 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type);
15e47304 2658 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 2659 if (nlh == NULL)
2660 goto nlmsg_failure;
c1d10adb 2661
96bcf938 2662 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2663 nfmsg->nfgen_family = exp->tuple.src.l3num;
2664 nfmsg->version = NFNETLINK_V0;
2665 nfmsg->res_id = 0;
2666
2667 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2668 goto nla_put_failure;
c1d10adb 2669
96bcf938 2670 nlmsg_end(skb, nlh);
15e47304 2671 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 2672 return 0;
c1d10adb 2673
df6fb868 2674nla_put_failure:
96bcf938 2675 nlmsg_cancel(skb, nlh);
528a3a6f 2676nlmsg_failure:
c1d10adb 2677 kfree_skb(skb);
150ace0d 2678errout:
9592a5c0 2679 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 2680 return 0;
c1d10adb
PNA		 2681}
2682#endif
cf6994c2
PM		 2683static int ctnetlink_exp_done(struct netlink_callback *cb)
2684{
31f15875
PM		 2685 if (cb->args[1])
2686 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2687 return 0;
2688}
c1d10adb
PNA		 2689
2690static int
2691ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2692{
9592a5c0 2693 struct net *net = sock_net(skb->sk);
cf6994c2 2694 struct nf_conntrack_expect *exp, *last;
96bcf938 2695 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 2696 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2697
7d0742da 2698 rcu_read_lock();
31f15875
PM		 2699 last = (struct nf_conntrack_expect *)cb->args[1];
2700 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2701restart:
7cddd967
LZ		 2702 hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]],
2703 hnode) {
31f15875 2704 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2705 continue;
03d7dc5c
FW		 2706
2707 if (!net_eq(nf_ct_net(exp->master), net))
2708 continue;
2709
31f15875
PM		 2710 if (cb->args[1]) {
2711 if (exp != last)
2712 continue;
2713 cb->args[1] = 0;
2714 }
8b0a231d 2715 if (ctnetlink_exp_fill_info(skb,
15e47304 2716 NETLINK_CB(cb->skb).portid,
31f15875
PM		 2717 cb->nlh->nlmsg_seq,
2718 IPCTNL_MSG_EXP_NEW,
8b0a231d 2719 exp) < 0) {
b54ab92b 2720 if (!refcount_inc_not_zero(&exp->use))
7d0742da 2721 continue;
31f15875
PM		 2722 cb->args[1] = (unsigned long)exp;
2723 goto out;
2724 }
cf6994c2 2725 }
31f15875
PM		 2726 if (cb->args[1]) {
2727 cb->args[1] = 0;
2728 goto restart;
cf6994c2
PM		 2729 }
2730 }
601e68e1 2731out:
7d0742da 2732 rcu_read_unlock();
cf6994c2
PM		 2733 if (last)
2734 nf_ct_expect_put(last);
c1d10adb 2735
c1d10adb
PNA		 2736 return skb->len;
2737}
2738
e844a928
PNA		 2739static int
2740ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2741{
2742 struct nf_conntrack_expect *exp, *last;
2743 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2744 struct nf_conn *ct = cb->data;
2745 struct nf_conn_help *help = nfct_help(ct);
2746 u_int8_t l3proto = nfmsg->nfgen_family;
2747
2748 if (cb->args[0])
2749 return 0;
2750
2751 rcu_read_lock();
2752 last = (struct nf_conntrack_expect *)cb->args[1];
2753restart:
7cddd967 2754 hlist_for_each_entry_rcu(exp, &help->expectations, lnode) {
e844a928
PNA		 2755 if (l3proto && exp->tuple.src.l3num != l3proto)
2756 continue;
2757 if (cb->args[1]) {
2758 if (exp != last)
2759 continue;
2760 cb->args[1] = 0;
2761 }
2762 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2763 cb->nlh->nlmsg_seq,
2764 IPCTNL_MSG_EXP_NEW,
2765 exp) < 0) {
b54ab92b 2766 if (!refcount_inc_not_zero(&exp->use))
e844a928
PNA		 2767 continue;
2768 cb->args[1] = (unsigned long)exp;
2769 goto out;
2770 }
2771 }
2772 if (cb->args[1]) {
2773 cb->args[1] = 0;
2774 goto restart;
2775 }
2776 cb->args[0] = 1;
2777out:
2778 rcu_read_unlock();
2779 if (last)
2780 nf_ct_expect_put(last);
2781
2782 return skb->len;
2783}
2784
7b8002a1
PNA		 2785static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
2786 struct sk_buff *skb,
e844a928 2787 const struct nlmsghdr *nlh,
04ba724b
PNA		 2788 const struct nlattr * const cda[],
2789 struct netlink_ext_ack *extack)
e844a928
PNA		 2790{
2791 int err;
e844a928
PNA		 2792 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2793 u_int8_t u3 = nfmsg->nfgen_family;
2794 struct nf_conntrack_tuple tuple;
2795 struct nf_conntrack_tuple_hash *h;
2796 struct nf_conn *ct;
308ac914 2797 struct nf_conntrack_zone zone;
e844a928
PNA		 2798 struct netlink_dump_control c = {
2799 .dump = ctnetlink_exp_ct_dump_table,
2800 .done = ctnetlink_exp_done,
2801 };
2802
deedb590
DB		 2803 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2804 u3, NULL);
e844a928
PNA		 2805 if (err < 0)
2806 return err;
2807
308ac914
DB		 2808 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2809 if (err < 0)
2810 return err;
e844a928 2811
308ac914 2812 h = nf_conntrack_find_get(net, &zone, &tuple);
e844a928
PNA		 2813 if (!h)
2814 return -ENOENT;
2815
2816 ct = nf_ct_tuplehash_to_ctrack(h);
207df815
LZ		 2817 /* No expectation linked to this connection tracking. */
2818 if (!nfct_help(ct)) {
2819 nf_ct_put(ct);
2820 return 0;
2821 }
2822
e844a928
PNA		 2823 c.data = ct;
2824
2825 err = netlink_dump_start(ctnl, skb, nlh, &c);
2826 nf_ct_put(ct);
2827
2828 return err;
2829}
2830
7b8002a1
PNA		 2831static int ctnetlink_get_expect(struct net *net, struct sock *ctnl,
2832 struct sk_buff *skb, const struct nlmsghdr *nlh,
04ba724b
PNA		 2833 const struct nlattr * const cda[],
2834 struct netlink_ext_ack *extack)
c1d10adb
PNA		 2835{
2836 struct nf_conntrack_tuple tuple;
2837 struct nf_conntrack_expect *exp;
2838 struct sk_buff *skb2;
96bcf938 2839 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2840 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 2841 struct nf_conntrack_zone zone;
ef00f89f 2842 int err;
c1d10adb 2843
b8f3ab42 2844 if (nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928 2845 if (cda[CTA_EXPECT_MASTER])
04ba724b
PNA		 2846 return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda,
2847 extack);
e844a928
PNA		 2848 else {
2849 struct netlink_dump_control c = {
2850 .dump = ctnetlink_exp_dump_table,
2851 .done = ctnetlink_exp_done,
2852 };
2853 return netlink_dump_start(ctnl, skb, nlh, &c);
2854 }
c1d10adb
PNA		 2855 }
2856
ef00f89f
PM		 2857 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2858 if (err < 0)
2859 return err;
2860
35dba1d7 2861 if (cda[CTA_EXPECT_TUPLE])
deedb590
DB		 2862 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2863 u3, NULL);
35dba1d7 2864 else if (cda[CTA_EXPECT_MASTER])
deedb590
DB		 2865 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2866 u3, NULL);
c1d10adb
PNA		 2867 else
2868 return -EINVAL;
2869
2870 if (err < 0)
2871 return err;
2872
308ac914 2873 exp = nf_ct_expect_find_get(net, &zone, &tuple);
c1d10adb
PNA		 2874 if (!exp)
2875 return -ENOENT;
2876
df6fb868 2877 if (cda[CTA_EXPECT_ID]) {
77236b6e 2878 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2879 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2880 nf_ct_expect_put(exp);
c1d10adb
PNA		 2881 return -ENOENT;
2882 }
601e68e1 2883 }
c1d10adb
PNA		 2884
2885 err = -ENOMEM;
96bcf938 2886 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2887 if (skb2 == NULL) {
2888 nf_ct_expect_put(exp);
c1d10adb 2889 goto out;
81378f72 2890 }
4e9b8269 2891
528a3a6f 2892 rcu_read_lock();
15e47304 2893 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
8b0a231d 2894 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2895 rcu_read_unlock();
81378f72 2896 nf_ct_expect_put(exp);
c1d10adb
PNA		 2897 if (err <= 0)
2898 goto free;
2899
15e47304 2900 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
81378f72
PNA		 2901 if (err < 0)
2902 goto out;
c1d10adb 2903
81378f72 2904 return 0;
c1d10adb
PNA		 2905
2906free:
2907 kfree_skb(skb2);
2908out:
81378f72
PNA		 2909 /* this avoids a loop in nfnetlink. */
2910 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2911}
2912
ac7b8483
FW		 2913static bool expect_iter_name(struct nf_conntrack_expect *exp, void *data)
2914{
2915 const struct nf_conn_help *m_help;
2916 const char *name = data;
2917
2918 m_help = nfct_help(exp->master);
2919
2920 return strcmp(m_help->helper->name, name) == 0;
2921}
2922
2923static bool expect_iter_all(struct nf_conntrack_expect *exp, void *data)
2924{
2925 return true;
2926}
2927
7b8002a1
PNA		 2928static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
2929 struct sk_buff *skb, const struct nlmsghdr *nlh,
04ba724b
PNA		 2930 const struct nlattr * const cda[],
2931 struct netlink_ext_ack *extack)
c1d10adb 2932{
31f15875 2933 struct nf_conntrack_expect *exp;
c1d10adb 2934 struct nf_conntrack_tuple tuple;
96bcf938 2935 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2936 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 2937 struct nf_conntrack_zone zone;
c1d10adb
PNA		 2938 int err;
2939
df6fb868 2940 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2941 /* delete a single expect by tuple */
ef00f89f
PM		 2942 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2943 if (err < 0)
2944 return err;
2945
deedb590
DB		 2946 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2947 u3, NULL);
c1d10adb
PNA		 2948 if (err < 0)
2949 return err;
2950
2951 /* bump usage count to 2 */
308ac914 2952 exp = nf_ct_expect_find_get(net, &zone, &tuple);
c1d10adb
PNA		 2953 if (!exp)
2954 return -ENOENT;
2955
df6fb868 2956 if (cda[CTA_EXPECT_ID]) {
77236b6e 2957 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2958 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2959 nf_ct_expect_put(exp);
c1d10adb
PNA		 2960 return -ENOENT;
2961 }
2962 }
2963
2964 /* after list removal, usage count == 1 */
ca7433df 2965 spin_lock_bh(&nf_conntrack_expect_lock);
ebbf41df 2966 if (del_timer(&exp->timeout)) {
15e47304 2967 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
ebbf41df
PNA		 2968 nlmsg_report(nlh));
2969 nf_ct_expect_put(exp);
2970 }
ca7433df 2971 spin_unlock_bh(&nf_conntrack_expect_lock);
601e68e1 2972 /* have to put what we 'get' above.
c1d10adb 2973 * after this line usage count == 0 */
6823645d 2974 nf_ct_expect_put(exp);
df6fb868
PM		 2975 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2976 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
c1d10adb 2977
ac7b8483
FW		 2978 nf_ct_expect_iterate_net(net, expect_iter_name, name,
2979 NETLINK_CB(skb).portid,
2980 nlmsg_report(nlh));
c1d10adb
PNA		 2981 } else {
2982 /* This basically means we have to flush everything*/
ac7b8483
FW		 2983 nf_ct_expect_iterate_net(net, expect_iter_all, NULL,
2984 NETLINK_CB(skb).portid,
2985 nlmsg_report(nlh));
c1d10adb
PNA		 2986 }
2987
2988 return 0;
2989}
2990static int
39938324
PM		 2991ctnetlink_change_expect(struct nf_conntrack_expect *x,
2992 const struct nlattr * const cda[])
c1d10adb 2993{
9768e1ac
KW		 2994 if (cda[CTA_EXPECT_TIMEOUT]) {
2995 if (!del_timer(&x->timeout))
2996 return -ETIME;
2997
2998 x->timeout.expires = jiffies +
2999 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
3000 add_timer(&x->timeout);
3001 }
3002 return 0;
c1d10adb
PNA		 3003}
3004
076a0ca0
PNA		 3005static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
3006 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
3007 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
3008};
3009
3010static int
3011ctnetlink_parse_expect_nat(const struct nlattr *attr,
3012 struct nf_conntrack_expect *exp,
3013 u_int8_t u3)
3014{
3015#ifdef CONFIG_NF_NAT_NEEDED
3016 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
3017 struct nf_conntrack_tuple nat_tuple = {};
3018 int err;
3019
fceb6435
JB		 3020 err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr,
3021 exp_nat_nla_policy, NULL);
130ffbc2
DB		 3022 if (err < 0)
3023 return err;
076a0ca0
PNA		 3024
3025 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
3026 return -EINVAL;
3027
3028 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
deedb590
DB		 3029 &nat_tuple, CTA_EXPECT_NAT_TUPLE,
3030 u3, NULL);
076a0ca0
PNA		 3031 if (err < 0)
3032 return err;
3033
c7232c99 3034 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 3035 exp->saved_proto = nat_tuple.src.u;
3036 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
3037
3038 return 0;
3039#else
3040 return -EOPNOTSUPP;
3041#endif
3042}
3043
0ef71ee1
PNA		 3044static struct nf_conntrack_expect *
3045ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
3046 struct nf_conntrack_helper *helper,
3047 struct nf_conntrack_tuple *tuple,
3048 struct nf_conntrack_tuple *mask)
c1d10adb 3049{
0ef71ee1 3050 u_int32_t class = 0;
c1d10adb 3051 struct nf_conntrack_expect *exp;
dc808fe2 3052 struct nf_conn_help *help;
0ef71ee1 3053 int err;
660fdb2a 3054
2c62e0bc
GF		 3055 help = nfct_help(ct);
3056 if (!help)
3057 return ERR_PTR(-EOPNOTSUPP);
3058
b8c5e52c
PNA		 3059 if (cda[CTA_EXPECT_CLASS] && helper) {
3060 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
0ef71ee1
PNA		 3061 if (class > helper->expect_class_max)
3062 return ERR_PTR(-EINVAL);
b8c5e52c 3063 }
6823645d 3064 exp = nf_ct_expect_alloc(ct);
0ef71ee1
PNA		 3065 if (!exp)
3066 return ERR_PTR(-ENOMEM);
3067
2c62e0bc
GF		 3068 if (cda[CTA_EXPECT_FLAGS]) {
3069 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3070 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
bc01befd 3071 } else {
2c62e0bc 3072 exp->flags = 0;
bc01befd 3073 }
544d5c7d
PNA		 3074 if (cda[CTA_EXPECT_FN]) {
3075 const char *name = nla_data(cda[CTA_EXPECT_FN]);
3076 struct nf_ct_helper_expectfn *expfn;
3077
3078 expfn = nf_ct_helper_expectfn_find_by_name(name);
3079 if (expfn == NULL) {
3080 err = -EINVAL;
3081 goto err_out;
3082 }
3083 exp->expectfn = expfn->expectfn;
3084 } else
3085 exp->expectfn = NULL;
601e68e1 3086
b8c5e52c 3087 exp->class = class;
c1d10adb 3088 exp->master = ct;
660fdb2a 3089 exp->helper = helper;
0ef71ee1
PNA		 3090 exp->tuple = *tuple;
3091 exp->mask.src.u3 = mask->src.u3;
3092 exp->mask.src.u.all = mask->src.u.all;
c1d10adb 3093
076a0ca0
PNA		 3094 if (cda[CTA_EXPECT_NAT]) {
3095 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
0ef71ee1 3096 exp, nf_ct_l3num(ct));
076a0ca0
PNA		 3097 if (err < 0)
3098 goto err_out;
3099 }
0ef71ee1 3100 return exp;
076a0ca0 3101err_out:
6823645d 3102 nf_ct_expect_put(exp);
0ef71ee1
PNA		 3103 return ERR_PTR(err);
3104}
3105
3106static int
308ac914
DB		 3107ctnetlink_create_expect(struct net *net,
3108 const struct nf_conntrack_zone *zone,
0ef71ee1
PNA		 3109 const struct nlattr * const cda[],
3110 u_int8_t u3, u32 portid, int report)
3111{
3112 struct nf_conntrack_tuple tuple, mask, master_tuple;
3113 struct nf_conntrack_tuple_hash *h = NULL;
3114 struct nf_conntrack_helper *helper = NULL;
3115 struct nf_conntrack_expect *exp;
3116 struct nf_conn *ct;
3117 int err;
3118
3119 /* caller guarantees that those three CTA_EXPECT_* exist */
deedb590
DB		 3120 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3121 u3, NULL);
0ef71ee1
PNA		 3122 if (err < 0)
3123 return err;
deedb590
DB		 3124 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
3125 u3, NULL);
0ef71ee1
PNA		 3126 if (err < 0)
3127 return err;
deedb590
DB		 3128 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
3129 u3, NULL);
0ef71ee1
PNA		 3130 if (err < 0)
3131 return err;
3132
3133 /* Look for master conntrack of this expectation */
3134 h = nf_conntrack_find_get(net, zone, &master_tuple);
3135 if (!h)
3136 return -ENOENT;
3137 ct = nf_ct_tuplehash_to_ctrack(h);
3138
8b5995d0 3139 rcu_read_lock();
0ef71ee1
PNA		 3140 if (cda[CTA_EXPECT_HELP_NAME]) {
3141 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
3142
3143 helper = __nf_conntrack_helper_find(helpname, u3,
3144 nf_ct_protonum(ct));
3145 if (helper == NULL) {
8b5995d0 3146 rcu_read_unlock();
0ef71ee1
PNA		 3147#ifdef CONFIG_MODULES
3148 if (request_module("nfct-helper-%s", helpname) < 0) {
3149 err = -EOPNOTSUPP;
3150 goto err_ct;
3151 }
8b5995d0 3152 rcu_read_lock();
0ef71ee1
PNA		 3153 helper = __nf_conntrack_helper_find(helpname, u3,
3154 nf_ct_protonum(ct));
3155 if (helper) {
3156 err = -EAGAIN;
8b5995d0 3157 goto err_rcu;
0ef71ee1 3158 }
8b5995d0 3159 rcu_read_unlock();
0ef71ee1
PNA		 3160#endif
3161 err = -EOPNOTSUPP;
3162 goto err_ct;
3163 }
3164 }
3165
3166 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
3167 if (IS_ERR(exp)) {
3168 err = PTR_ERR(exp);
8b5995d0 3169 goto err_rcu;
0ef71ee1
PNA		 3170 }
3171
3172 err = nf_ct_expect_related_report(exp, portid, report);
0ef71ee1 3173 nf_ct_expect_put(exp);
8b5995d0
GF		 3174err_rcu:
3175 rcu_read_unlock();
0ef71ee1
PNA		 3176err_ct:
3177 nf_ct_put(ct);
c1d10adb
PNA		 3178 return err;
3179}
3180
7b8002a1
PNA		 3181static int ctnetlink_new_expect(struct net *net, struct sock *ctnl,
3182 struct sk_buff *skb, const struct nlmsghdr *nlh,
04ba724b
PNA		 3183 const struct nlattr * const cda[],
3184 struct netlink_ext_ack *extack)
c1d10adb
PNA		 3185{
3186 struct nf_conntrack_tuple tuple;
3187 struct nf_conntrack_expect *exp;
96bcf938 3188 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 3189 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 3190 struct nf_conntrack_zone zone;
ef00f89f 3191 int err;
c1d10adb 3192
df6fb868
PM		 3193 if (!cda[CTA_EXPECT_TUPLE]
3194 || !cda[CTA_EXPECT_MASK]
3195 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 3196 return -EINVAL;
3197
ef00f89f
PM		 3198 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3199 if (err < 0)
3200 return err;
3201
deedb590
DB		 3202 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3203 u3, NULL);
c1d10adb
PNA		 3204 if (err < 0)
3205 return err;
3206
ca7433df 3207 spin_lock_bh(&nf_conntrack_expect_lock);
308ac914 3208 exp = __nf_ct_expect_find(net, &zone, &tuple);
c1d10adb 3209 if (!exp) {
ca7433df 3210 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3211 err = -ENOENT;
19abb7b0 3212 if (nlh->nlmsg_flags & NLM_F_CREATE) {
308ac914 3213 err = ctnetlink_create_expect(net, &zone, cda, u3,
15e47304 3214 NETLINK_CB(skb).portid,
19abb7b0
PNA		 3215 nlmsg_report(nlh));
3216 }
c1d10adb
PNA		 3217 return err;
3218 }
3219
3220 err = -EEXIST;
3221 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
3222 err = ctnetlink_change_expect(exp, cda);
ca7433df 3223 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3224
c1d10adb
PNA		 3225 return err;
3226}
3227
392025f8 3228static int
15e47304 3229ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 3230 const struct ip_conntrack_stat *st)
3231{
3232 struct nlmsghdr *nlh;
3233 struct nfgenmsg *nfmsg;
15e47304 3234 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 3235
dedb67c4
PNA		 3236 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
3237 IPCTNL_MSG_EXP_GET_STATS_CPU);
15e47304 3238 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 3239 if (nlh == NULL)
3240 goto nlmsg_failure;
3241
3242 nfmsg = nlmsg_data(nlh);
3243 nfmsg->nfgen_family = AF_UNSPEC;
3244 nfmsg->version = NFNETLINK_V0;
3245 nfmsg->res_id = htons(cpu);
3246
3247 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3248 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3249 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3250 goto nla_put_failure;
3251
3252 nlmsg_end(skb, nlh);
3253 return skb->len;
3254
3255nla_put_failure:
3256nlmsg_failure:
3257 nlmsg_cancel(skb, nlh);
3258 return -1;
3259}
3260
3261static int
3262ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3263{
3264 int cpu;
3265 struct net *net = sock_net(skb->sk);
3266
3267 if (cb->args[0] == nr_cpu_ids)
3268 return 0;
3269
3270 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3271 const struct ip_conntrack_stat *st;
3272
3273 if (!cpu_possible(cpu))
3274 continue;
3275
3276 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 3277 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 3278 cb->nlh->nlmsg_seq,
3279 cpu, st) < 0)
3280 break;
3281 }
3282 cb->args[0] = cpu;
3283
3284 return skb->len;
3285}
3286
7b8002a1
PNA		 3287static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl,
3288 struct sk_buff *skb,
3289 const struct nlmsghdr *nlh,
04ba724b
PNA		 3290 const struct nlattr * const cda[],
3291 struct netlink_ext_ack *extack)
392025f8
PNA		 3292{
3293 if (nlh->nlmsg_flags & NLM_F_DUMP) {
3294 struct netlink_dump_control c = {
3295 .dump = ctnetlink_exp_stat_cpu_dump,
3296 };
3297 return netlink_dump_start(ctnl, skb, nlh, &c);
3298 }
3299
3300 return 0;
3301}
3302
c1d10adb 3303#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 3304static struct nf_ct_event_notifier ctnl_notifier = {
3305 .fcn = ctnetlink_conntrack_event,
c1d10adb
PNA		 3306};
3307
e34d5c1a
PNA		 3308static struct nf_exp_event_notifier ctnl_notifier_exp = {
3309 .fcn = ctnetlink_expect_event,
c1d10adb
PNA		 3310};
3311#endif
3312
7c8d4cb4 3313static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
c1d10adb 3314 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
f73e924c
PM		 3315 .attr_count = CTA_MAX,
3316 .policy = ct_nla_policy },
c1d10adb 3317 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3318 .attr_count = CTA_MAX,
3319 .policy = ct_nla_policy },
c1d10adb 3320 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
f73e924c
PM		 3321 .attr_count = CTA_MAX,
3322 .policy = ct_nla_policy },
c1d10adb 3323 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3324 .attr_count = CTA_MAX,
3325 .policy = ct_nla_policy },
392025f8
PNA		 3326 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
3327 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
d871befe
PNA		 3328 [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying },
3329 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed },
c1d10adb
PNA		 3330};
3331
7c8d4cb4 3332static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
c1d10adb 3333 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
f73e924c
PM		 3334 .attr_count = CTA_EXPECT_MAX,
3335 .policy = exp_nla_policy },
c1d10adb 3336 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
f73e924c
PM		 3337 .attr_count = CTA_EXPECT_MAX,
3338 .policy = exp_nla_policy },
c1d10adb 3339 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
f73e924c
PM		 3340 .attr_count = CTA_EXPECT_MAX,
3341 .policy = exp_nla_policy },
392025f8 3342 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
c1d10adb
PNA		 3343};
3344
7c8d4cb4 3345static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 3346 .name = "conntrack",
3347 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3348 .cb_count = IPCTNL_MSG_MAX,
3349 .cb = ctnl_cb,
3350};
3351
7c8d4cb4 3352static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 3353 .name = "conntrack_expect",
3354 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3355 .cb_count = IPCTNL_MSG_EXP_MAX,
3356 .cb = ctnl_exp_cb,
3357};
3358
d2483dde 3359MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 3360MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 3361MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 3362
70e9942f
PNA		 3363static int __net_init ctnetlink_net_init(struct net *net)
3364{
3365#ifdef CONFIG_NF_CONNTRACK_EVENTS
3366 int ret;
3367
3368 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
3369 if (ret < 0) {
3370 pr_err("ctnetlink_init: cannot register notifier.\n");
3371 goto err_out;
3372 }
3373
3374 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
3375 if (ret < 0) {
3376 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3377 goto err_unreg_notifier;
3378 }
3379#endif
3380 return 0;
3381
3382#ifdef CONFIG_NF_CONNTRACK_EVENTS
3383err_unreg_notifier:
3384 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3385err_out:
3386 return ret;
3387#endif
3388}
3389
3390static void ctnetlink_net_exit(struct net *net)
3391{
3392#ifdef CONFIG_NF_CONNTRACK_EVENTS
3393 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
3394 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3395#endif
3396}
3397
3398static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
3399{
3400 struct net *net;
3401
3402 list_for_each_entry(net, net_exit_list, exit_list)
3403 ctnetlink_net_exit(net);
3404}
3405
3406static struct pernet_operations ctnetlink_net_ops = {
3407 .init = ctnetlink_net_init,
3408 .exit_batch = ctnetlink_net_exit_batch,
3409};
3410
c1d10adb
PNA		 3411static int __init ctnetlink_init(void)
3412{
3413 int ret;
3414
654d0fbd 3415 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
c1d10adb
PNA		 3416 ret = nfnetlink_subsys_register(&ctnl_subsys);
3417 if (ret < 0) {
654d0fbd 3418 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 3419 goto err_out;
3420 }
3421
3422 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3423 if (ret < 0) {
654d0fbd 3424 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 3425 goto err_unreg_subsys;
3426 }
3427
ef6acf68
JL		 3428 ret = register_pernet_subsys(&ctnetlink_net_ops);
3429 if (ret < 0) {
70e9942f 3430 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 3431 goto err_unreg_exp_subsys;
3432 }
83f3e94d 3433#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 3434 /* setup interaction between nf_queue and nf_conntrack_netlink. */
a4b4766c 3435 RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook);
9cb01766 3436#endif
c1d10adb
PNA		 3437 return 0;
3438
c1d10adb
PNA		 3439err_unreg_exp_subsys:
3440 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 3441err_unreg_subsys:
3442 nfnetlink_subsys_unregister(&ctnl_subsys);
3443err_out:
3444 return ret;
3445}
3446
3447static void __exit ctnetlink_exit(void)
3448{
654d0fbd 3449 pr_info("ctnetlink: unregistering from nfnetlink.\n");
c1d10adb 3450
70e9942f 3451 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 3452 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3453 nfnetlink_subsys_unregister(&ctnl_subsys);
83f3e94d 3454#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
a4b4766c 3455 RCU_INIT_POINTER(nfnl_ct_hook, NULL);
9cb01766 3456#endif
3b7dabf0 3457 synchronize_rcu();
c1d10adb
PNA		 3458}
3459
3460module_init(ctnetlink_init);
3461module_exit(ctnetlink_exit);
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