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[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>
5b1158e9
JK		 48#ifdef CONFIG_NF_NAT_NEEDED
49#include <net/netfilter/nf_nat_core.h>
c7232c99 50#include <net/netfilter/nf_nat_l4proto.h>
8c88f87c 51#include <net/netfilter/nf_nat_helper.h>
5b1158e9 52#endif
c1d10adb
PNA		 53
54#include <linux/netfilter/nfnetlink.h>
55#include <linux/netfilter/nfnetlink_conntrack.h>
56
57MODULE_LICENSE("GPL");
58
dc808fe2 59static char __initdata version[] = "0.93";
c1d10adb 60
4054ff45
PNA		 61static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
62 const struct nf_conntrack_tuple *tuple,
63 struct nf_conntrack_l4proto *l4proto)
c1d10adb 64{
c1d10adb 65 int ret = 0;
df6fb868 66 struct nlattr *nest_parms;
c1d10adb 67
df6fb868
PM		 68 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
69 if (!nest_parms)
70 goto nla_put_failure;
cc1eb431
DM		 71 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
72 goto nla_put_failure;
c1d10adb 73
fdf70832
PM		 74 if (likely(l4proto->tuple_to_nlattr))
75 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 76
df6fb868 77 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 78
79 return ret;
80
df6fb868 81nla_put_failure:
c1d10adb
PNA		 82 return -1;
83}
84
4054ff45
PNA		 85static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
86 const struct nf_conntrack_tuple *tuple,
87 struct nf_conntrack_l3proto *l3proto)
c1d10adb 88{
c1d10adb 89 int ret = 0;
df6fb868
PM		 90 struct nlattr *nest_parms;
91
92 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
93 if (!nest_parms)
94 goto nla_put_failure;
1cde6436 95
fdf70832
PM		 96 if (likely(l3proto->tuple_to_nlattr))
97 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 98
df6fb868 99 nla_nest_end(skb, nest_parms);
c1d10adb 100
1cde6436
PNA		 101 return ret;
102
df6fb868 103nla_put_failure:
1cde6436
PNA		 104 return -1;
105}
106
4054ff45
PNA		 107static int ctnetlink_dump_tuples(struct sk_buff *skb,
108 const struct nf_conntrack_tuple *tuple)
1cde6436
PNA		 109{
110 int ret;
111 struct nf_conntrack_l3proto *l3proto;
605dcad6 112 struct nf_conntrack_l4proto *l4proto;
1cde6436 113
3b988ece 114 rcu_read_lock();
528a3a6f 115 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 116 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 117
3b988ece
HS		 118 if (ret >= 0) {
119 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
120 tuple->dst.protonum);
121 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
122 }
123 rcu_read_unlock();
c1d10adb 124 return ret;
c1d10adb
PNA		 125}
126
4054ff45
PNA		 127static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
128 const struct nf_conntrack_zone *zone, int dir)
deedb590
DB		 129{
130 if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
131 return 0;
132 if (nla_put_be16(skb, attrtype, htons(zone->id)))
133 goto nla_put_failure;
134 return 0;
135
136nla_put_failure:
137 return -1;
138}
139
4054ff45 140static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 141{
cc1eb431
DM		 142 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
143 goto nla_put_failure;
c1d10adb
PNA		 144 return 0;
145
df6fb868 146nla_put_failure:
c1d10adb
PNA		 147 return -1;
148}
149
4054ff45 150static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 151{
d0b35b93 152 long timeout = nf_ct_expires(ct) / HZ;
601e68e1 153
cc1eb431
DM		 154 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
155 goto nla_put_failure;
c1d10adb
PNA		 156 return 0;
157
df6fb868 158nla_put_failure:
c1d10adb
PNA		 159 return -1;
160}
161
4054ff45 162static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 163{
5e8fbe2a 164 struct nf_conntrack_l4proto *l4proto;
df6fb868 165 struct nlattr *nest_proto;
c1d10adb
PNA		 166 int ret;
167
528a3a6f
PNA		 168 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
169 if (!l4proto->to_nlattr)
c1d10adb 170 return 0;
601e68e1 171
df6fb868
PM		 172 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
173 if (!nest_proto)
174 goto nla_put_failure;
c1d10adb 175
fdf70832 176 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 177
df6fb868 178 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 179
180 return ret;
181
df6fb868 182nla_put_failure:
c1d10adb
PNA		 183 return -1;
184}
185
4054ff45
PNA		 186static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
187 const struct nf_conn *ct)
c1d10adb 188{
df6fb868 189 struct nlattr *nest_helper;
dc808fe2 190 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 191 struct nf_conntrack_helper *helper;
c1d10adb 192
3c158f7f 193 if (!help)
c1d10adb 194 return 0;
601e68e1 195
3c158f7f
PM		 196 helper = rcu_dereference(help->helper);
197 if (!helper)
198 goto out;
199
df6fb868
PM		 200 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
201 if (!nest_helper)
202 goto nla_put_failure;
cc1eb431
DM		 203 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
204 goto nla_put_failure;
c1d10adb 205
fdf70832
PM		 206 if (helper->to_nlattr)
207 helper->to_nlattr(skb, ct);
c1d10adb 208
df6fb868 209 nla_nest_end(skb, nest_helper);
3c158f7f 210out:
c1d10adb
PNA		 211 return 0;
212
df6fb868 213nla_put_failure:
c1d10adb
PNA		 214 return -1;
215}
216
bb5cf80e 217static int
4542fa47
HE		 218dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
219 enum ip_conntrack_dir dir, int type)
c1d10adb 220{
4542fa47
HE		 221 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
222 struct nf_conn_counter *counter = acct->counter;
df6fb868 223 struct nlattr *nest_count;
4542fa47 224 u64 pkts, bytes;
c1d10adb 225
4542fa47
HE		 226 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
227 pkts = atomic64_xchg(&counter[dir].packets, 0);
228 bytes = atomic64_xchg(&counter[dir].bytes, 0);
229 } else {
230 pkts = atomic64_read(&counter[dir].packets);
231 bytes = atomic64_read(&counter[dir].bytes);
232 }
233
234 nest_count = nla_nest_start(skb, attr | NLA_F_NESTED);
df6fb868
PM		 235 if (!nest_count)
236 goto nla_put_failure;
237
b46f6ded
ND		 238 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
239 CTA_COUNTERS_PAD) ||
240 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
241 CTA_COUNTERS_PAD))
cc1eb431 242 goto nla_put_failure;
c1d10adb 243
df6fb868 244 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 245
246 return 0;
247
df6fb868 248nla_put_failure:
c1d10adb
PNA		 249 return -1;
250}
c1d10adb 251
80e60e67 252static int
4542fa47 253ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
80e60e67 254{
4542fa47 255 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
80e60e67 256
80e60e67
PNA		 257 if (!acct)
258 return 0;
259
4542fa47
HE		 260 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
261 return -1;
262 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
263 return -1;
264
265 return 0;
80e60e67
PNA		 266}
267
a992ca2a
PNA		 268static int
269ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
270{
271 struct nlattr *nest_count;
272 const struct nf_conn_tstamp *tstamp;
273
274 tstamp = nf_conn_tstamp_find(ct);
275 if (!tstamp)
276 return 0;
277
278 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
279 if (!nest_count)
280 goto nla_put_failure;
281
b46f6ded
ND		 282 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
283 CTA_TIMESTAMP_PAD) ||
cc1eb431 284 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
b46f6ded
ND		 285 cpu_to_be64(tstamp->stop),
286 CTA_TIMESTAMP_PAD)))
cc1eb431 287 goto nla_put_failure;
a992ca2a
PNA		 288 nla_nest_end(skb, nest_count);
289
290 return 0;
291
292nla_put_failure:
293 return -1;
294}
295
c1d10adb 296#ifdef CONFIG_NF_CONNTRACK_MARK
4054ff45 297static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 298{
cc1eb431
DM		 299 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
300 goto nla_put_failure;
c1d10adb
PNA		 301 return 0;
302
df6fb868 303nla_put_failure:
c1d10adb
PNA		 304 return -1;
305}
306#else
307#define ctnetlink_dump_mark(a, b) (0)
308#endif
309
37fccd85 310#ifdef CONFIG_NF_CONNTRACK_SECMARK
4054ff45 311static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 312{
1cc63249
EP		 313 struct nlattr *nest_secctx;
314 int len, ret;
315 char *secctx;
316
317 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
318 if (ret)
cba85b53 319 return 0;
1cc63249
EP		 320
321 ret = -1;
322 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
323 if (!nest_secctx)
324 goto nla_put_failure;
37fccd85 325
cc1eb431
DM		 326 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
327 goto nla_put_failure;
1cc63249
EP		 328 nla_nest_end(skb, nest_secctx);
329
330 ret = 0;
37fccd85 331nla_put_failure:
1cc63249
EP		 332 security_release_secctx(secctx, len);
333 return ret;
37fccd85
PNA		 334}
335#else
1cc63249 336#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 337#endif
338
0ceabd83 339#ifdef CONFIG_NF_CONNTRACK_LABELS
4a96300c 340static inline int ctnetlink_label_size(const struct nf_conn *ct)
0ceabd83
FW		 341{
342 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
343
344 if (!labels)
345 return 0;
23014011 346 return nla_total_size(sizeof(labels->bits));
0ceabd83
FW		 347}
348
349static int
350ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
351{
352 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
23014011 353 unsigned int i;
0ceabd83
FW		 354
355 if (!labels)
356 return 0;
357
0ceabd83
FW		 358 i = 0;
359 do {
360 if (labels->bits[i] != 0)
23014011
FW		 361 return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
362 labels->bits);
0ceabd83 363 i++;
23014011 364 } while (i < ARRAY_SIZE(labels->bits));
0ceabd83
FW		 365
366 return 0;
367}
368#else
369#define ctnetlink_dump_labels(a, b) (0)
370#define ctnetlink_label_size(a) (0)
371#endif
372
0f417ce9
PNA		 373#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
374
4054ff45 375static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
0f417ce9
PNA		 376{
377 struct nlattr *nest_parms;
378
379 if (!(ct->status & IPS_EXPECTED))
380 return 0;
381
382 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
383 if (!nest_parms)
384 goto nla_put_failure;
385 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
386 goto nla_put_failure;
387 nla_nest_end(skb, nest_parms);
388
389 return 0;
390
391nla_put_failure:
392 return -1;
393}
394
bb5cf80e 395static int
41d73ec0 396dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
13eae15a 397{
13eae15a
PNA		 398 struct nlattr *nest_parms;
399
400 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
401 if (!nest_parms)
402 goto nla_put_failure;
403
41d73ec0
PM		 404 if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
405 htonl(seq->correction_pos)) ||
406 nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
407 htonl(seq->offset_before)) ||
408 nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
409 htonl(seq->offset_after)))
cc1eb431 410 goto nla_put_failure;
13eae15a
PNA		 411
412 nla_nest_end(skb, nest_parms);
413
414 return 0;
415
416nla_put_failure:
417 return -1;
418}
419
64f3967c 420static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, struct nf_conn *ct)
13eae15a 421{
41d73ec0
PM		 422 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
423 struct nf_ct_seqadj *seq;
13eae15a 424
41d73ec0 425 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
13eae15a
PNA		 426 return 0;
427
64f3967c 428 spin_lock_bh(&ct->lock);
41d73ec0
PM		 429 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
430 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
64f3967c 431 goto err;
13eae15a 432
41d73ec0
PM		 433 seq = &seqadj->seq[IP_CT_DIR_REPLY];
434 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
64f3967c 435 goto err;
13eae15a 436
64f3967c 437 spin_unlock_bh(&ct->lock);
13eae15a 438 return 0;
64f3967c
LZ		 439err:
440 spin_unlock_bh(&ct->lock);
441 return -1;
13eae15a 442}
13eae15a 443
4054ff45 444static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 445{
cc1eb431
DM		 446 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
447 goto nla_put_failure;
c1d10adb
PNA		 448 return 0;
449
df6fb868 450nla_put_failure:
c1d10adb
PNA		 451 return -1;
452}
453
4054ff45 454static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 455{
cc1eb431
DM		 456 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
457 goto nla_put_failure;
c1d10adb
PNA		 458 return 0;
459
df6fb868 460nla_put_failure:
c1d10adb
PNA		 461 return -1;
462}
463
c1d10adb 464static int
15e47304 465ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
80e60e67 466 struct nf_conn *ct)
c1d10adb 467{
308ac914 468 const struct nf_conntrack_zone *zone;
c1d10adb
PNA		 469 struct nlmsghdr *nlh;
470 struct nfgenmsg *nfmsg;
df6fb868 471 struct nlattr *nest_parms;
15e47304 472 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c1d10adb 473
dedb67c4 474 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW);
15e47304 475 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 476 if (nlh == NULL)
477 goto nlmsg_failure;
c1d10adb 478
96bcf938 479 nfmsg = nlmsg_data(nlh);
5e8fbe2a 480 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 481 nfmsg->version = NFNETLINK_V0;
482 nfmsg->res_id = 0;
483
deedb590
DB		 484 zone = nf_ct_zone(ct);
485
df6fb868
PM		 486 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
487 if (!nest_parms)
488 goto nla_put_failure;
f2f3e38c 489 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 490 goto nla_put_failure;
deedb590
DB		 491 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
492 NF_CT_ZONE_DIR_ORIG) < 0)
493 goto nla_put_failure;
df6fb868 494 nla_nest_end(skb, nest_parms);
601e68e1 495
df6fb868
PM		 496 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
497 if (!nest_parms)
498 goto nla_put_failure;
f2f3e38c 499 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 500 goto nla_put_failure;
deedb590
DB		 501 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
502 NF_CT_ZONE_DIR_REPL) < 0)
503 goto nla_put_failure;
df6fb868 504 nla_nest_end(skb, nest_parms);
c1d10adb 505
deedb590
DB		 506 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
507 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 508 goto nla_put_failure;
ef00f89f 509
c1d10adb
PNA		 510 if (ctnetlink_dump_status(skb, ct) < 0 ||
511 ctnetlink_dump_timeout(skb, ct) < 0 ||
4542fa47 512 ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 513 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 514 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
515 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
516 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 517 ctnetlink_dump_secctx(skb, ct) < 0 ||
0ceabd83 518 ctnetlink_dump_labels(skb, ct) < 0 ||
c1d10adb 519 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 520 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 521 ctnetlink_dump_master(skb, ct) < 0 ||
41d73ec0 522 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
df6fb868 523 goto nla_put_failure;
c1d10adb 524
96bcf938 525 nlmsg_end(skb, nlh);
c1d10adb
PNA		 526 return skb->len;
527
528nlmsg_failure:
df6fb868 529nla_put_failure:
96bcf938 530 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 531 return -1;
532}
533
4a96300c 534static inline size_t ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4
HE		 535{
536 struct nf_conntrack_l3proto *l3proto;
537 struct nf_conntrack_l4proto *l4proto;
03b64f51
PNA		 538 size_t len = 0;
539
540 rcu_read_lock();
541 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
542 len += l3proto->nla_size;
543
544 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
545 len += l4proto->nla_size;
546 rcu_read_unlock();
547
548 return len;
549}
550
4a96300c 551static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
d26e6a02
JP		 552{
553 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
554 return 0;
555 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
b46f6ded
ND		 556 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
557 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
d26e6a02
JP		 558 ;
559}
560
4a96300c 561static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 562{
cba85b53
PNA		 563#ifdef CONFIG_NF_CONNTRACK_SECMARK
564 int len, ret;
1cc63249 565
cba85b53
PNA		 566 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
567 if (ret)
568 return 0;
1cc63249 569
cba85b53
PNA		 570 return nla_total_size(0) /* CTA_SECCTX */
571 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
572#else
573 return 0;
1cc63249 574#endif
cba85b53 575}
1cc63249 576
4a96300c 577static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
a992ca2a
PNA		 578{
579#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
580 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
581 return 0;
b46f6ded 582 return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
a992ca2a
PNA		 583#else
584 return 0;
585#endif
586}
587
4054ff45
PNA		 588#ifdef CONFIG_NF_CONNTRACK_EVENTS
589static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
03b64f51
PNA		 590{
591 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
592 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
593 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
594 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
595 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
596 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
597 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
f7b13e43 598 + ctnetlink_acct_size(ct)
a992ca2a 599 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 600 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
601 + nla_total_size(0) /* CTA_PROTOINFO */
602 + nla_total_size(0) /* CTA_HELP */
603 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 604 + ctnetlink_secctx_size(ct)
d271e8bd 605#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 606 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
607 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 608#endif
609#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 610 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 611#endif
612#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 613 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
d271e8bd 614#endif
03b64f51 615 + ctnetlink_proto_size(ct)
0ceabd83 616 + ctnetlink_label_size(ct)
03b64f51 617 ;
2732c4e4
HE		 618}
619
e34d5c1a
PNA		 620static int
621ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 622{
308ac914 623 const struct nf_conntrack_zone *zone;
9592a5c0 624 struct net *net;
c1d10adb
PNA		 625 struct nlmsghdr *nlh;
626 struct nfgenmsg *nfmsg;
df6fb868 627 struct nlattr *nest_parms;
19abb7b0 628 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 629 struct sk_buff *skb;
630 unsigned int type;
c1d10adb 631 unsigned int flags = 0, group;
dd7669a9 632 int err;
c1d10adb 633
a0891aa6 634 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 635 type = IPCTNL_MSG_CT_DELETE;
636 group = NFNLGRP_CONNTRACK_DESTROY;
a0891aa6 637 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 638 type = IPCTNL_MSG_CT_NEW;
639 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 640 group = NFNLGRP_CONNTRACK_NEW;
17e6e4ea 641 } else if (events) {
c1d10adb
PNA		 642 type = IPCTNL_MSG_CT_NEW;
643 group = NFNLGRP_CONNTRACK_UPDATE;
644 } else
e34d5c1a 645 return 0;
a2427692 646
9592a5c0
AD		 647 net = nf_ct_net(ct);
648 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 649 return 0;
a2427692 650
03b64f51
PNA		 651 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
652 if (skb == NULL)
150ace0d 653 goto errout;
c1d10adb 654
dedb67c4 655 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type);
15e47304 656 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 657 if (nlh == NULL)
658 goto nlmsg_failure;
c1d10adb 659
96bcf938 660 nfmsg = nlmsg_data(nlh);
5e8fbe2a 661 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 662 nfmsg->version = NFNETLINK_V0;
663 nfmsg->res_id = 0;
664
528a3a6f 665 rcu_read_lock();
deedb590
DB		 666 zone = nf_ct_zone(ct);
667
df6fb868
PM		 668 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
669 if (!nest_parms)
670 goto nla_put_failure;
f2f3e38c 671 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 672 goto nla_put_failure;
deedb590
DB		 673 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
674 NF_CT_ZONE_DIR_ORIG) < 0)
675 goto nla_put_failure;
df6fb868 676 nla_nest_end(skb, nest_parms);
601e68e1 677
df6fb868
PM		 678 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
679 if (!nest_parms)
680 goto nla_put_failure;
f2f3e38c 681 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 682 goto nla_put_failure;
deedb590
DB		 683 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
684 NF_CT_ZONE_DIR_REPL) < 0)
685 goto nla_put_failure;
df6fb868 686 nla_nest_end(skb, nest_parms);
c1d10adb 687
deedb590
DB		 688 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
689 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 690 goto nla_put_failure;
ef00f89f 691
1eedf699
EL		 692 if (ctnetlink_dump_id(skb, ct) < 0)
693 goto nla_put_failure;
694
e57dce60
FH		 695 if (ctnetlink_dump_status(skb, ct) < 0)
696 goto nla_put_failure;
697
a0891aa6 698 if (events & (1 << IPCT_DESTROY)) {
4542fa47 699 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 700 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 701 goto nla_put_failure;
7b621c1e 702 } else {
7b621c1e 703 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 704 goto nla_put_failure;
7b621c1e 705
a0891aa6 706 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 707 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 708 goto nla_put_failure;
7b621c1e 709
a0891aa6 710 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 711 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 712 goto nla_put_failure;
7b621c1e 713
ff660c80 714#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 715 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 716 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 717 goto nla_put_failure;
ff660c80 718#endif
0ceabd83
FW		 719 if (events & (1 << IPCT_LABEL) &&
720 ctnetlink_dump_labels(skb, ct) < 0)
721 goto nla_put_failure;
7b621c1e 722
a0891aa6 723 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 724 ctnetlink_dump_master(skb, ct) < 0)
725 goto nla_put_failure;
726
41d73ec0
PM		 727 if (events & (1 << IPCT_SEQADJ) &&
728 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
13eae15a 729 goto nla_put_failure;
7b621c1e 730 }
b9a37e0c 731
a83099a6 732#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 733 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 734 && ctnetlink_dump_mark(skb, ct) < 0)
735 goto nla_put_failure;
736#endif
528a3a6f 737 rcu_read_unlock();
a83099a6 738
96bcf938 739 nlmsg_end(skb, nlh);
15e47304 740 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 741 GFP_ATOMIC);
dd7669a9
PNA		 742 if (err == -ENOBUFS || err == -EAGAIN)
743 return -ENOBUFS;
744
e34d5c1a 745 return 0;
c1d10adb 746
df6fb868 747nla_put_failure:
528a3a6f 748 rcu_read_unlock();
96bcf938 749 nlmsg_cancel(skb, nlh);
528a3a6f 750nlmsg_failure:
c1d10adb 751 kfree_skb(skb);
150ace0d 752errout:
37b7ef72
PNA		 753 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
754 return -ENOBUFS;
755
e34d5c1a 756 return 0;
c1d10adb
PNA		 757}
758#endif /* CONFIG_NF_CONNTRACK_EVENTS */
759
760static int ctnetlink_done(struct netlink_callback *cb)
761{
89f2e218
PM		 762 if (cb->args[1])
763 nf_ct_put((struct nf_conn *)cb->args[1]);
397304b5 764 kfree(cb->data);
c1d10adb
PNA		 765 return 0;
766}
767
866476f3 768struct ctnetlink_filter {
0f298a28
PNA		 769 struct {
770 u_int32_t val;
771 u_int32_t mask;
772 } mark;
773};
774
866476f3
KE		 775static struct ctnetlink_filter *
776ctnetlink_alloc_filter(const struct nlattr * const cda[])
777{
778#ifdef CONFIG_NF_CONNTRACK_MARK
779 struct ctnetlink_filter *filter;
780
781 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
782 if (filter == NULL)
783 return ERR_PTR(-ENOMEM);
784
785 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
786 filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
787
788 return filter;
789#else
790 return ERR_PTR(-EOPNOTSUPP);
791#endif
792}
793
794static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
795{
796 struct ctnetlink_filter *filter = data;
797
798 if (filter == NULL)
799 return 1;
800
801#ifdef CONFIG_NF_CONNTRACK_MARK
802 if ((ct->mark & filter->mark.mask) == filter->mark.val)
803 return 1;
804#endif
805
806 return 0;
807}
808
c1d10adb
PNA		 809static int
810ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
811{
9592a5c0 812 struct net *net = sock_net(skb->sk);
89f2e218 813 struct nf_conn *ct, *last;
c1d10adb 814 struct nf_conntrack_tuple_hash *h;
ea781f19 815 struct hlist_nulls_node *n;
96bcf938 816 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 817 u_int8_t l3proto = nfmsg->nfgen_family;
2344d64e
FW		 818 struct nf_conn *nf_ct_evict[8];
819 int res, i;
93bb0ceb
JDB		 820 spinlock_t *lockp;
821
d205dc40 822 last = (struct nf_conn *)cb->args[1];
2344d64e 823 i = 0;
93bb0ceb
JDB		 824
825 local_bh_disable();
56d52d48 826 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
89f2e218 827restart:
2344d64e
FW		 828 while (i) {
829 i--;
830 if (nf_ct_should_gc(nf_ct_evict[i]))
831 nf_ct_kill(nf_ct_evict[i]);
832 nf_ct_put(nf_ct_evict[i]);
833 }
834
93bb0ceb 835 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
b16c2919 836 nf_conntrack_lock(lockp);
56d52d48 837 if (cb->args[0] >= nf_conntrack_htable_size) {
93bb0ceb
JDB		 838 spin_unlock(lockp);
839 goto out;
840 }
56d52d48
FW		 841 hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
842 hnnode) {
5b1158e9 843 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 844 continue;
845 ct = nf_ct_tuplehash_to_ctrack(h);
2344d64e
FW		 846 if (nf_ct_is_expired(ct)) {
847 if (i < ARRAY_SIZE(nf_ct_evict) &&
848 atomic_inc_not_zero(&ct->ct_general.use))
849 nf_ct_evict[i++] = ct;
850 continue;
851 }
852
e0c7d472
FW		 853 if (!net_eq(net, nf_ct_net(ct)))
854 continue;
855
87711cb8
PNA		 856 /* Dump entries of a given L3 protocol number.
857 * If it is not specified, ie. l3proto == 0,
858 * then dump everything. */
5e8fbe2a 859 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 860 continue;
d205dc40
PM		 861 if (cb->args[1]) {
862 if (ct != last)
13ee6ac5 863 continue;
d205dc40 864 cb->args[1] = 0;
89f2e218 865 }
866476f3 866 if (!ctnetlink_filter_match(ct, cb->data))
0f298a28 867 continue;
866476f3 868
3b988ece
HS		 869 rcu_read_lock();
870 res =
15e47304 871 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 872 cb->nlh->nlmsg_seq,
873 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
874 ct);
875 rcu_read_unlock();
876 if (res < 0) {
c71caf41 877 nf_conntrack_get(&ct->ct_general);
89f2e218 878 cb->args[1] = (unsigned long)ct;
93bb0ceb 879 spin_unlock(lockp);
c1d10adb 880 goto out;
89f2e218
PM		 881 }
882 }
93bb0ceb 883 spin_unlock(lockp);
d205dc40 884 if (cb->args[1]) {
89f2e218
PM		 885 cb->args[1] = 0;
886 goto restart;
c1d10adb
PNA		 887 }
888 }
89f2e218 889out:
93bb0ceb 890 local_bh_enable();
d205dc40
PM		 891 if (last)
892 nf_ct_put(last);
c1d10adb 893
2344d64e
FW		 894 while (i) {
895 i--;
896 if (nf_ct_should_gc(nf_ct_evict[i]))
897 nf_ct_kill(nf_ct_evict[i]);
898 nf_ct_put(nf_ct_evict[i]);
899 }
900
c1d10adb
PNA		 901 return skb->len;
902}
903
4054ff45
PNA		 904static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
905 struct nf_conntrack_tuple *tuple)
c1d10adb 906{
df6fb868 907 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 908 struct nf_conntrack_l3proto *l3proto;
909 int ret = 0;
910
fceb6435 911 ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL, NULL);
130ffbc2
DB		 912 if (ret < 0)
913 return ret;
c1d10adb 914
cd91566e
FW		 915 rcu_read_lock();
916 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 917
f73e924c
PM		 918 if (likely(l3proto->nlattr_to_tuple)) {
919 ret = nla_validate_nested(attr, CTA_IP_MAX,
fceb6435 920 l3proto->nla_policy, NULL);
f73e924c
PM		 921 if (ret == 0)
922 ret = l3proto->nlattr_to_tuple(tb, tuple);
923 }
c1d10adb 924
cd91566e 925 rcu_read_unlock();
c1d10adb 926
c1d10adb
PNA		 927 return ret;
928}
929
f73e924c
PM		 930static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
931 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 932};
933
4054ff45
PNA		 934static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
935 struct nf_conntrack_tuple *tuple)
c1d10adb 936{
df6fb868 937 struct nlattr *tb[CTA_PROTO_MAX+1];
605dcad6 938 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 939 int ret = 0;
940
fceb6435
JB		 941 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy,
942 NULL);
f73e924c
PM		 943 if (ret < 0)
944 return ret;
c1d10adb 945
df6fb868 946 if (!tb[CTA_PROTO_NUM])
c1d10adb 947 return -EINVAL;
77236b6e 948 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 949
cd91566e
FW		 950 rcu_read_lock();
951 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 952
f73e924c
PM		 953 if (likely(l4proto->nlattr_to_tuple)) {
954 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
fceb6435 955 l4proto->nla_policy, NULL);
f73e924c
PM		 956 if (ret == 0)
957 ret = l4proto->nlattr_to_tuple(tb, tuple);
958 }
c1d10adb 959
cd91566e 960 rcu_read_unlock();
601e68e1 961
c1d10adb
PNA		 962 return ret;
963}
964
deedb590
DB		 965static int
966ctnetlink_parse_zone(const struct nlattr *attr,
967 struct nf_conntrack_zone *zone)
968{
5e8018fc
DB		 969 nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
970 NF_CT_DEFAULT_ZONE_DIR, 0);
deedb590
DB		 971#ifdef CONFIG_NF_CONNTRACK_ZONES
972 if (attr)
973 zone->id = ntohs(nla_get_be16(attr));
974#else
975 if (attr)
976 return -EOPNOTSUPP;
977#endif
978 return 0;
979}
980
981static int
982ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
983 struct nf_conntrack_zone *zone)
984{
985 int ret;
986
987 if (zone->id != NF_CT_DEFAULT_ZONE_ID)
988 return -EINVAL;
989
990 ret = ctnetlink_parse_zone(attr, zone);
991 if (ret < 0)
992 return ret;
993
994 if (type == CTA_TUPLE_REPLY)
995 zone->dir = NF_CT_ZONE_DIR_REPL;
996 else
997 zone->dir = NF_CT_ZONE_DIR_ORIG;
998
999 return 0;
1000}
1001
d0b0268f
PM		 1002static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
1003 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
1004 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
deedb590 1005 [CTA_TUPLE_ZONE] = { .type = NLA_U16 },
d0b0268f
PM		 1006};
1007
bb5cf80e 1008static int
39938324
PM		 1009ctnetlink_parse_tuple(const struct nlattr * const cda[],
1010 struct nf_conntrack_tuple *tuple,
deedb590
DB		 1011 enum ctattr_type type, u_int8_t l3num,
1012 struct nf_conntrack_zone *zone)
c1d10adb 1013{
df6fb868 1014 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 1015 int err;
1016
c1d10adb
PNA		 1017 memset(tuple, 0, sizeof(*tuple));
1018
fceb6435
JB		 1019 err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy,
1020 NULL);
130ffbc2
DB		 1021 if (err < 0)
1022 return err;
c1d10adb 1023
df6fb868 1024 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 1025 return -EINVAL;
1026
1027 tuple->src.l3num = l3num;
1028
df6fb868 1029 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 1030 if (err < 0)
1031 return err;
1032
df6fb868 1033 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 1034 return -EINVAL;
1035
df6fb868 1036 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 1037 if (err < 0)
1038 return err;
1039
deedb590
DB		 1040 if (tb[CTA_TUPLE_ZONE]) {
1041 if (!zone)
1042 return -EINVAL;
1043
1044 err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
1045 type, zone);
1046 if (err < 0)
1047 return err;
1048 }
1049
c1d10adb
PNA		 1050 /* orig and expect tuples get DIR_ORIGINAL */
1051 if (type == CTA_TUPLE_REPLY)
1052 tuple->dst.dir = IP_CT_DIR_REPLY;
1053 else
1054 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
1055
c1d10adb
PNA		 1056 return 0;
1057}
1058
d0b0268f 1059static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 1060 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
1061 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 1062};
1063
4054ff45
PNA		 1064static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
1065 struct nlattr **helpinfo)
c1d10adb 1066{
130ffbc2 1067 int err;
df6fb868 1068 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 1069
fceb6435 1070 err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy, NULL);
130ffbc2
DB		 1071 if (err < 0)
1072 return err;
c1d10adb 1073
df6fb868 1074 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 1075 return -EINVAL;
1076
df6fb868 1077 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 1078
ae243bee
PNA		 1079 if (tb[CTA_HELP_INFO])
1080 *helpinfo = tb[CTA_HELP_INFO];
1081
c1d10adb
PNA		 1082 return 0;
1083}
1084
f73e924c 1085static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 1086 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
1087 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 1088 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 1089 [CTA_PROTOINFO] = { .type = NLA_NESTED },
1090 [CTA_HELP] = { .type = NLA_NESTED },
1091 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 1092 [CTA_TIMEOUT] = { .type = NLA_U32 },
1093 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 1094 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 1095 [CTA_NAT_DST] = { .type = NLA_NESTED },
1096 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 1097 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
1098 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 1099 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 1100 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9 1101 [CTA_LABELS] = { .type = NLA_BINARY,
d2bf2f34 1102 .len = NF_CT_LABELS_MAX_SIZE },
9b21f6a9 1103 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
d2bf2f34 1104 .len = NF_CT_LABELS_MAX_SIZE },
c1d10adb
PNA		 1105};
1106
866476f3
KE		 1107static int ctnetlink_flush_conntrack(struct net *net,
1108 const struct nlattr * const cda[],
1109 u32 portid, int report)
1110{
1111 struct ctnetlink_filter *filter = NULL;
1112
1113 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1114 filter = ctnetlink_alloc_filter(cda);
1115 if (IS_ERR(filter))
1116 return PTR_ERR(filter);
1117 }
1118
1119 nf_ct_iterate_cleanup(net, ctnetlink_filter_match, filter,
1120 portid, report);
1121 kfree(filter);
1122
1123 return 0;
1124}
1125
7b8002a1
PNA		 1126static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl,
1127 struct sk_buff *skb,
1128 const struct nlmsghdr *nlh,
1129 const struct nlattr * const cda[])
c1d10adb
PNA		 1130{
1131 struct nf_conntrack_tuple_hash *h;
1132 struct nf_conntrack_tuple tuple;
1133 struct nf_conn *ct;
96bcf938 1134 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1135 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1136 struct nf_conntrack_zone zone;
ef00f89f
PM		 1137 int err;
1138
1139 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1140 if (err < 0)
1141 return err;
c1d10adb 1142
df6fb868 1143 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1144 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1145 u3, &zone);
df6fb868 1146 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1147 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1148 u3, &zone);
c1d10adb 1149 else {
866476f3
KE		 1150 return ctnetlink_flush_conntrack(net, cda,
1151 NETLINK_CB(skb).portid,
1152 nlmsg_report(nlh));
c1d10adb
PNA		 1153 }
1154
1155 if (err < 0)
1156 return err;
1157
308ac914 1158 h = nf_conntrack_find_get(net, &zone, &tuple);
9ea8cfd6 1159 if (!h)
c1d10adb 1160 return -ENOENT;
c1d10adb
PNA		 1161
1162 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1163
df6fb868 1164 if (cda[CTA_ID]) {
77236b6e 1165 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 1166 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 1167 nf_ct_put(ct);
1168 return -ENOENT;
1169 }
601e68e1 1170 }
c1d10adb 1171
f330a7fd 1172 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh));
c1d10adb 1173 nf_ct_put(ct);
c1d10adb
PNA		 1174
1175 return 0;
1176}
1177
7b8002a1
PNA		 1178static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl,
1179 struct sk_buff *skb,
1180 const struct nlmsghdr *nlh,
1181 const struct nlattr * const cda[])
c1d10adb
PNA		 1182{
1183 struct nf_conntrack_tuple_hash *h;
1184 struct nf_conntrack_tuple tuple;
1185 struct nf_conn *ct;
1186 struct sk_buff *skb2 = NULL;
96bcf938 1187 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1188 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1189 struct nf_conntrack_zone zone;
ef00f89f 1190 int err;
c1d10adb 1191
80d326fa
PNA		 1192 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1193 struct netlink_dump_control c = {
1194 .dump = ctnetlink_dump_table,
1195 .done = ctnetlink_done,
1196 };
866476f3 1197
0f298a28 1198 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
866476f3 1199 struct ctnetlink_filter *filter;
0f298a28 1200
866476f3
KE		 1201 filter = ctnetlink_alloc_filter(cda);
1202 if (IS_ERR(filter))
1203 return PTR_ERR(filter);
0f298a28 1204
0f298a28
PNA		 1205 c.data = filter;
1206 }
80d326fa
PNA		 1207 return netlink_dump_start(ctnl, skb, nlh, &c);
1208 }
c1d10adb 1209
ef00f89f
PM		 1210 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1211 if (err < 0)
1212 return err;
1213
df6fb868 1214 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1215 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1216 u3, &zone);
df6fb868 1217 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1218 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1219 u3, &zone);
c1d10adb
PNA		 1220 else
1221 return -EINVAL;
1222
1223 if (err < 0)
1224 return err;
1225
308ac914 1226 h = nf_conntrack_find_get(net, &zone, &tuple);
9ea8cfd6 1227 if (!h)
c1d10adb 1228 return -ENOENT;
9ea8cfd6 1229
c1d10adb
PNA		 1230 ct = nf_ct_tuplehash_to_ctrack(h);
1231
1232 err = -ENOMEM;
96bcf938
PNA		 1233 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1234 if (skb2 == NULL) {
c1d10adb
PNA		 1235 nf_ct_put(ct);
1236 return -ENOMEM;
1237 }
c1d10adb 1238
528a3a6f 1239 rcu_read_lock();
15e47304 1240 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
80e60e67 1241 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1242 rcu_read_unlock();
c1d10adb
PNA		 1243 nf_ct_put(ct);
1244 if (err <= 0)
1245 goto free;
1246
15e47304 1247 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
c1d10adb
PNA		 1248 if (err < 0)
1249 goto out;
1250
c1d10adb
PNA		 1251 return 0;
1252
1253free:
1254 kfree_skb(skb2);
1255out:
f31e8d49
PNA		 1256 /* this avoids a loop in nfnetlink. */
1257 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1258}
1259
d871befe
PNA		 1260static int ctnetlink_done_list(struct netlink_callback *cb)
1261{
1262 if (cb->args[1])
1263 nf_ct_put((struct nf_conn *)cb->args[1]);
1264 return 0;
1265}
1266
1267static int
b7779d06 1268ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
d871befe 1269{
cd5f336f 1270 struct nf_conn *ct, *last;
d871befe
PNA		 1271 struct nf_conntrack_tuple_hash *h;
1272 struct hlist_nulls_node *n;
1273 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1274 u_int8_t l3proto = nfmsg->nfgen_family;
1275 int res;
b7779d06
JDB		 1276 int cpu;
1277 struct hlist_nulls_head *list;
1278 struct net *net = sock_net(skb->sk);
d871befe
PNA		 1279
1280 if (cb->args[2])
1281 return 0;
1282
cd5f336f
FW		 1283 last = (struct nf_conn *)cb->args[1];
1284
b7779d06
JDB		 1285 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1286 struct ct_pcpu *pcpu;
1287
1288 if (!cpu_possible(cpu))
d871befe 1289 continue;
b7779d06
JDB		 1290
1291 pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
1292 spin_lock_bh(&pcpu->lock);
b7779d06
JDB		 1293 list = dying ? &pcpu->dying : &pcpu->unconfirmed;
1294restart:
1295 hlist_nulls_for_each_entry(h, n, list, hnnode) {
1296 ct = nf_ct_tuplehash_to_ctrack(h);
1297 if (l3proto && nf_ct_l3num(ct) != l3proto)
d871befe 1298 continue;
b7779d06
JDB		 1299 if (cb->args[1]) {
1300 if (ct != last)
1301 continue;
1302 cb->args[1] = 0;
1303 }
1304 rcu_read_lock();
1305 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1306 cb->nlh->nlmsg_seq,
1307 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1308 ct);
1309 rcu_read_unlock();
1310 if (res < 0) {
cd5f336f
FW		 1311 if (!atomic_inc_not_zero(&ct->ct_general.use))
1312 continue;
266155b2 1313 cb->args[0] = cpu;
b7779d06
JDB		 1314 cb->args[1] = (unsigned long)ct;
1315 spin_unlock_bh(&pcpu->lock);
1316 goto out;
1317 }
d871befe 1318 }
b7779d06
JDB		 1319 if (cb->args[1]) {
1320 cb->args[1] = 0;
1321 goto restart;
266155b2 1322 }
b7779d06 1323 spin_unlock_bh(&pcpu->lock);
d871befe 1324 }
266155b2 1325 cb->args[2] = 1;
d871befe 1326out:
d871befe
PNA		 1327 if (last)
1328 nf_ct_put(last);
1329
1330 return skb->len;
1331}
1332
1333static int
1334ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1335{
b7779d06 1336 return ctnetlink_dump_list(skb, cb, true);
d871befe
PNA		 1337}
1338
7b8002a1
PNA		 1339static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl,
1340 struct sk_buff *skb,
1341 const struct nlmsghdr *nlh,
1342 const struct nlattr * const cda[])
d871befe
PNA		 1343{
1344 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1345 struct netlink_dump_control c = {
1346 .dump = ctnetlink_dump_dying,
1347 .done = ctnetlink_done_list,
1348 };
1349 return netlink_dump_start(ctnl, skb, nlh, &c);
1350 }
1351
1352 return -EOPNOTSUPP;
1353}
1354
1355static int
1356ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1357{
b7779d06 1358 return ctnetlink_dump_list(skb, cb, false);
d871befe
PNA		 1359}
1360
7b8002a1
PNA		 1361static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl,
1362 struct sk_buff *skb,
1363 const struct nlmsghdr *nlh,
1364 const struct nlattr * const cda[])
d871befe
PNA		 1365{
1366 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1367 struct netlink_dump_control c = {
1368 .dump = ctnetlink_dump_unconfirmed,
1369 .done = ctnetlink_done_list,
1370 };
1371 return netlink_dump_start(ctnl, skb, nlh, &c);
1372 }
1373
1374 return -EOPNOTSUPP;
1375}
1376
67671841 1377#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1378static int
1379ctnetlink_parse_nat_setup(struct nf_conn *ct,
1380 enum nf_nat_manip_type manip,
39938324 1381 const struct nlattr *attr)
e6a7d3c0
PNA		 1382{
1383 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
c7232c99 1384 int err;
e6a7d3c0
PNA		 1385
1386 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1387 if (!parse_nat_setup) {
95a5afca 1388#ifdef CONFIG_MODULES
e6a7d3c0 1389 rcu_read_unlock();
c14b78e7 1390 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1391 if (request_module("nf-nat") < 0) {
c14b78e7 1392 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1393 rcu_read_lock();
1394 return -EOPNOTSUPP;
1395 }
c14b78e7 1396 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1397 rcu_read_lock();
1398 if (nfnetlink_parse_nat_setup_hook)
1399 return -EAGAIN;
1400#endif
1401 return -EOPNOTSUPP;
1402 }
1403
c7232c99
PM		 1404 err = parse_nat_setup(ct, manip, attr);
1405 if (err == -EAGAIN) {
1406#ifdef CONFIG_MODULES
1407 rcu_read_unlock();
c14b78e7 1408 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1409 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1410 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1411 rcu_read_lock();
1412 return -EOPNOTSUPP;
1413 }
c14b78e7 1414 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1415 rcu_read_lock();
1416#else
1417 err = -EOPNOTSUPP;
1418#endif
1419 }
1420 return err;
e6a7d3c0 1421}
67671841 1422#endif
e6a7d3c0 1423
53b56da8
LZ		 1424static void
1425__ctnetlink_change_status(struct nf_conn *ct, unsigned long on,
1426 unsigned long off)
1427{
1428 unsigned int bit;
1429
1430 /* Ignore these unchangable bits */
1431 on &= ~IPS_UNCHANGEABLE_MASK;
1432 off &= ~IPS_UNCHANGEABLE_MASK;
1433
1434 for (bit = 0; bit < __IPS_MAX_BIT; bit++) {
1435 if (on & (1 << bit))
1436 set_bit(bit, &ct->status);
1437 else if (off & (1 << bit))
1438 clear_bit(bit, &ct->status);
1439 }
1440}
1441
bb5cf80e 1442static int
39938324 1443ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1444{
1445 unsigned long d;
77236b6e 1446 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1447 d = ct->status ^ status;
1448
1449 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1450 /* unchangeable */
0adf9d67 1451 return -EBUSY;
601e68e1 1452
c1d10adb
PNA		 1453 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1454 /* SEEN_REPLY bit can only be set */
0adf9d67 1455 return -EBUSY;
601e68e1 1456
c1d10adb
PNA		 1457 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1458 /* ASSURED bit can only be set */
0adf9d67 1459 return -EBUSY;
c1d10adb 1460
53b56da8 1461 __ctnetlink_change_status(ct, status, 0);
c1d10adb
PNA		 1462 return 0;
1463}
1464
e6a7d3c0 1465static int
0eba801b 1466ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1467{
1468#ifdef CONFIG_NF_NAT_NEEDED
1469 int ret;
1470
fe337ac2
FW		 1471 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1472 return 0;
1473
0eba801b
PNA		 1474 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1475 cda[CTA_NAT_DST]);
1476 if (ret < 0)
1477 return ret;
1478
1479 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1480 cda[CTA_NAT_SRC]);
1481 return ret;
e6a7d3c0 1482#else
0eba801b
PNA		 1483 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1484 return 0;
e6a7d3c0
PNA		 1485 return -EOPNOTSUPP;
1486#endif
1487}
c1d10adb 1488
4054ff45
PNA		 1489static int ctnetlink_change_helper(struct nf_conn *ct,
1490 const struct nlattr * const cda[])
c1d10adb
PNA		 1491{
1492 struct nf_conntrack_helper *helper;
dc808fe2 1493 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1494 char *helpname = NULL;
ae243bee 1495 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1496 int err;
1497
ae243bee 1498 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1499 if (err < 0)
1500 return err;
1501
f95d7a46
KC		 1502 /* don't change helper of sibling connections */
1503 if (ct->master) {
1504 /* If we try to change the helper to the same thing twice,
1505 * treat the second attempt as a no-op instead of returning
1506 * an error.
1507 */
3173d5b8
LZ		 1508 err = -EBUSY;
1509 if (help) {
1510 rcu_read_lock();
1511 helper = rcu_dereference(help->helper);
1512 if (helper && !strcmp(helper->name, helpname))
1513 err = 0;
1514 rcu_read_unlock();
1515 }
1516
1517 return err;
f95d7a46
KC		 1518 }
1519
df293bbb
YK		 1520 if (!strcmp(helpname, "")) {
1521 if (help && help->helper) {
c1d10adb
PNA		 1522 /* we had a helper before ... */
1523 nf_ct_remove_expectations(ct);
a9b3cd7f 1524 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1525 }
df293bbb
YK		 1526
1527 return 0;
c1d10adb 1528 }
601e68e1 1529
88be4c09 1530 rcu_read_lock();
794e6871
PM		 1531 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1532 nf_ct_protonum(ct));
226c0c0e 1533 if (helper == NULL) {
88be4c09 1534 rcu_read_unlock();
0adf9d67 1535 return -EOPNOTSUPP;
226c0c0e 1536 }
df293bbb 1537
ceceae1b 1538 if (help) {
ae243bee
PNA		 1539 if (help->helper == helper) {
1540 /* update private helper data if allowed. */
7be54ca4 1541 if (helper->from_nlattr)
ae243bee 1542 helper->from_nlattr(helpinfo, ct);
88be4c09 1543 err = 0;
fd7462de 1544 } else
88be4c09
LZ		 1545 err = -EBUSY;
1546 } else {
1547 /* we cannot set a helper for an existing conntrack */
1548 err = -EOPNOTSUPP;
ceceae1b 1549 }
df293bbb 1550
88be4c09
LZ		 1551 rcu_read_unlock();
1552 return err;
c1d10adb
PNA		 1553}
1554
4054ff45
PNA		 1555static int ctnetlink_change_timeout(struct nf_conn *ct,
1556 const struct nlattr * const cda[])
c1d10adb 1557{
77236b6e 1558 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
601e68e1 1559
f330a7fd 1560 ct->timeout = nfct_time_stamp + timeout * HZ;
c1d10adb 1561
f330a7fd
FW		 1562 if (test_bit(IPS_DYING_BIT, &ct->status))
1563 return -ETIME;
c1d10adb
PNA		 1564
1565 return 0;
1566}
1567
d0b0268f
PM		 1568static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1569 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1570 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1571 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1572};
1573
4054ff45
PNA		 1574static int ctnetlink_change_protoinfo(struct nf_conn *ct,
1575 const struct nlattr * const cda[])
c1d10adb 1576{
39938324
PM		 1577 const struct nlattr *attr = cda[CTA_PROTOINFO];
1578 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
605dcad6 1579 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 1580 int err = 0;
1581
fceb6435
JB		 1582 err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy,
1583 NULL);
130ffbc2
DB		 1584 if (err < 0)
1585 return err;
c1d10adb 1586
cd91566e
FW		 1587 rcu_read_lock();
1588 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1589 if (l4proto->from_nlattr)
1590 err = l4proto->from_nlattr(tb, ct);
cd91566e 1591 rcu_read_unlock();
c1d10adb
PNA		 1592
1593 return err;
1594}
1595
41d73ec0
PM		 1596static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = {
1597 [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 },
1598 [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 },
1599 [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 },
d0b0268f
PM		 1600};
1601
4054ff45
PNA		 1602static int change_seq_adj(struct nf_ct_seqadj *seq,
1603 const struct nlattr * const attr)
13eae15a 1604{
130ffbc2 1605 int err;
41d73ec0 1606 struct nlattr *cda[CTA_SEQADJ_MAX+1];
13eae15a 1607
fceb6435 1608 err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy, NULL);
130ffbc2
DB		 1609 if (err < 0)
1610 return err;
13eae15a 1611
41d73ec0 1612 if (!cda[CTA_SEQADJ_CORRECTION_POS])
13eae15a
PNA		 1613 return -EINVAL;
1614
41d73ec0
PM		 1615 seq->correction_pos =
1616 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
13eae15a 1617
41d73ec0 1618 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
13eae15a
PNA		 1619 return -EINVAL;
1620
41d73ec0
PM		 1621 seq->offset_before =
1622 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
13eae15a 1623
41d73ec0 1624 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
13eae15a
PNA		 1625 return -EINVAL;
1626
41d73ec0
PM		 1627 seq->offset_after =
1628 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
13eae15a
PNA		 1629
1630 return 0;
1631}
1632
1633static int
41d73ec0
PM		 1634ctnetlink_change_seq_adj(struct nf_conn *ct,
1635 const struct nlattr * const cda[])
13eae15a 1636{
41d73ec0 1637 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
13eae15a 1638 int ret = 0;
13eae15a 1639
41d73ec0 1640 if (!seqadj)
13eae15a
PNA		 1641 return 0;
1642
64f3967c 1643 spin_lock_bh(&ct->lock);
41d73ec0
PM		 1644 if (cda[CTA_SEQ_ADJ_ORIG]) {
1645 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
1646 cda[CTA_SEQ_ADJ_ORIG]);
13eae15a 1647 if (ret < 0)
64f3967c 1648 goto err;
13eae15a 1649
53b56da8 1650 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 1651 }
1652
41d73ec0
PM		 1653 if (cda[CTA_SEQ_ADJ_REPLY]) {
1654 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
1655 cda[CTA_SEQ_ADJ_REPLY]);
13eae15a 1656 if (ret < 0)
64f3967c 1657 goto err;
13eae15a 1658
53b56da8 1659 set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
13eae15a
PNA		 1660 }
1661
64f3967c 1662 spin_unlock_bh(&ct->lock);
13eae15a 1663 return 0;
64f3967c
LZ		 1664err:
1665 spin_unlock_bh(&ct->lock);
1666 return ret;
13eae15a 1667}
13eae15a 1668
9b21f6a9
FW		 1669static int
1670ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1671{
1672#ifdef CONFIG_NF_CONNTRACK_LABELS
1673 size_t len = nla_len(cda[CTA_LABELS]);
1674 const void *mask = cda[CTA_LABELS_MASK];
1675
1676 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1677 return -EINVAL;
1678
1679 if (mask) {
1680 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1681 nla_len(cda[CTA_LABELS_MASK]) != len)
1682 return -EINVAL;
1683 mask = nla_data(cda[CTA_LABELS_MASK]);
1684 }
1685
1686 len /= sizeof(u32);
1687
1688 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1689#else
1690 return -EOPNOTSUPP;
1691#endif
1692}
1693
c1d10adb 1694static int
39938324
PM		 1695ctnetlink_change_conntrack(struct nf_conn *ct,
1696 const struct nlattr * const cda[])
c1d10adb
PNA		 1697{
1698 int err;
1699
e098360f
PNA		 1700 /* only allow NAT changes and master assignation for new conntracks */
1701 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1702 return -EOPNOTSUPP;
1703
df6fb868 1704 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1705 err = ctnetlink_change_helper(ct, cda);
1706 if (err < 0)
1707 return err;
1708 }
1709
df6fb868 1710 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1711 err = ctnetlink_change_timeout(ct, cda);
1712 if (err < 0)
1713 return err;
1714 }
1715
df6fb868 1716 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1717 err = ctnetlink_change_status(ct, cda);
1718 if (err < 0)
1719 return err;
1720 }
1721
df6fb868 1722 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1723 err = ctnetlink_change_protoinfo(ct, cda);
1724 if (err < 0)
1725 return err;
1726 }
1727
bcd1e830 1728#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1729 if (cda[CTA_MARK])
77236b6e 1730 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1731#endif
1732
41d73ec0
PM		 1733 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1734 err = ctnetlink_change_seq_adj(ct, cda);
13eae15a
PNA		 1735 if (err < 0)
1736 return err;
1737 }
41d73ec0 1738
9b21f6a9
FW		 1739 if (cda[CTA_LABELS]) {
1740 err = ctnetlink_attach_labels(ct, cda);
1741 if (err < 0)
1742 return err;
1743 }
13eae15a 1744
c1d10adb
PNA		 1745 return 0;
1746}
1747
f0a3c086 1748static struct nf_conn *
308ac914
DB		 1749ctnetlink_create_conntrack(struct net *net,
1750 const struct nf_conntrack_zone *zone,
9592a5c0 1751 const struct nlattr * const cda[],
c1d10adb 1752 struct nf_conntrack_tuple *otuple,
5faa1f4c 1753 struct nf_conntrack_tuple *rtuple,
7ec47496 1754 u8 u3)
c1d10adb
PNA		 1755{
1756 struct nf_conn *ct;
1757 int err = -EINVAL;
ceceae1b 1758 struct nf_conntrack_helper *helper;
315c34da 1759 struct nf_conn_tstamp *tstamp;
c1d10adb 1760
ef00f89f 1761 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1762 if (IS_ERR(ct))
f0a3c086 1763 return ERR_PTR(-ENOMEM);
c1d10adb 1764
df6fb868 1765 if (!cda[CTA_TIMEOUT])
0f5b3e85 1766 goto err1;
c1d10adb 1767
f330a7fd 1768 ct->timeout = nfct_time_stamp + ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;
c1d10adb 1769
1575e7ea 1770 rcu_read_lock();
226c0c0e 1771 if (cda[CTA_HELP]) {
29fe1b48 1772 char *helpname = NULL;
ae243bee
PNA		 1773 struct nlattr *helpinfo = NULL;
1774
1775 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1776 if (err < 0)
1777 goto err2;
226c0c0e 1778
794e6871
PM		 1779 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1780 nf_ct_protonum(ct));
226c0c0e
PNA		 1781 if (helper == NULL) {
1782 rcu_read_unlock();
1783#ifdef CONFIG_MODULES
1784 if (request_module("nfct-helper-%s", helpname) < 0) {
1785 err = -EOPNOTSUPP;
0f5b3e85 1786 goto err1;
226c0c0e
PNA		 1787 }
1788
1789 rcu_read_lock();
794e6871
PM		 1790 helper = __nf_conntrack_helper_find(helpname,
1791 nf_ct_l3num(ct),
1792 nf_ct_protonum(ct));
226c0c0e 1793 if (helper) {
226c0c0e 1794 err = -EAGAIN;
0f5b3e85 1795 goto err2;
226c0c0e
PNA		 1796 }
1797 rcu_read_unlock();
1798#endif
1799 err = -EOPNOTSUPP;
0f5b3e85 1800 goto err1;
226c0c0e
PNA		 1801 } else {
1802 struct nf_conn_help *help;
1803
1afc5679 1804 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1805 if (help == NULL) {
226c0c0e 1806 err = -ENOMEM;
0f5b3e85 1807 goto err2;
226c0c0e 1808 }
ae243bee 1809 /* set private helper data if allowed. */
7be54ca4 1810 if (helper->from_nlattr)
ae243bee 1811 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1812
1813 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1814 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1815 }
1816 } else {
1817 /* try an implicit helper assignation */
b2a15a60 1818 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1819 if (err < 0)
1820 goto err2;
1575e7ea
PNA		 1821 }
1822
0eba801b
PNA		 1823 err = ctnetlink_setup_nat(ct, cda);
1824 if (err < 0)
1825 goto err2;
e6a7d3c0 1826
a88e22ad 1827 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1828 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 1829 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017
FW		 1830 nf_ct_labels_ext_add(ct);
1831
a88e22ad
PNA		 1832 /* we must add conntrack extensions before confirmation. */
1833 ct->status |= IPS_CONFIRMED;
1834
1835 if (cda[CTA_STATUS]) {
1836 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1837 if (err < 0)
1838 goto err2;
bbb3357d 1839 }
c1d10adb 1840
41d73ec0
PM		 1841 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1842 err = ctnetlink_change_seq_adj(ct, cda);
0f5b3e85
PM		 1843 if (err < 0)
1844 goto err2;
c969aa7d 1845 }
c969aa7d 1846
e5fc9e7a 1847 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 1848 if (cda[CTA_PROTOINFO]) {
c1d10adb 1849 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 1850 if (err < 0)
1851 goto err2;
c1d10adb
PNA		 1852 }
1853
bcd1e830 1854#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1855 if (cda[CTA_MARK])
77236b6e 1856 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1857#endif
1858
5faa1f4c 1859 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 1860 if (cda[CTA_TUPLE_MASTER]) {
1861 struct nf_conntrack_tuple master;
1862 struct nf_conntrack_tuple_hash *master_h;
1863 struct nf_conn *master_ct;
1864
deedb590
DB		 1865 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
1866 u3, NULL);
7ec47496 1867 if (err < 0)
0f5b3e85 1868 goto err2;
7ec47496 1869
ef00f89f 1870 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 1871 if (master_h == NULL) {
1872 err = -ENOENT;
0f5b3e85 1873 goto err2;
7ec47496
PNA		 1874 }
1875 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 1876 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 1877 ct->master = master_ct;
f2a89004 1878 }
315c34da
PNA		 1879 tstamp = nf_conn_tstamp_find(ct);
1880 if (tstamp)
d2de875c 1881 tstamp->start = ktime_get_real_ns();
5faa1f4c 1882
7d367e06
JK		 1883 err = nf_conntrack_hash_check_insert(ct);
1884 if (err < 0)
1885 goto err2;
1886
58a3c9bb 1887 rcu_read_unlock();
dafc741c 1888
f0a3c086 1889 return ct;
c1d10adb 1890
0f5b3e85
PM		 1891err2:
1892 rcu_read_unlock();
1893err1:
c1d10adb 1894 nf_conntrack_free(ct);
f0a3c086 1895 return ERR_PTR(err);
c1d10adb
PNA		 1896}
1897
7b8002a1
PNA		 1898static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
1899 struct sk_buff *skb,
1900 const struct nlmsghdr *nlh,
1901 const struct nlattr * const cda[])
c1d10adb
PNA		 1902{
1903 struct nf_conntrack_tuple otuple, rtuple;
1904 struct nf_conntrack_tuple_hash *h = NULL;
96bcf938 1905 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
7d367e06 1906 struct nf_conn *ct;
c1d10adb 1907 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1908 struct nf_conntrack_zone zone;
ef00f89f
PM		 1909 int err;
1910
1911 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1912 if (err < 0)
1913 return err;
c1d10adb 1914
df6fb868 1915 if (cda[CTA_TUPLE_ORIG]) {
deedb590
DB		 1916 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
1917 u3, &zone);
c1d10adb
PNA		 1918 if (err < 0)
1919 return err;
1920 }
1921
df6fb868 1922 if (cda[CTA_TUPLE_REPLY]) {
deedb590
DB		 1923 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
1924 u3, &zone);
c1d10adb
PNA		 1925 if (err < 0)
1926 return err;
1927 }
1928
df6fb868 1929 if (cda[CTA_TUPLE_ORIG])
308ac914 1930 h = nf_conntrack_find_get(net, &zone, &otuple);
df6fb868 1931 else if (cda[CTA_TUPLE_REPLY])
308ac914 1932 h = nf_conntrack_find_get(net, &zone, &rtuple);
c1d10adb
PNA		 1933
1934 if (h == NULL) {
c1d10adb 1935 err = -ENOENT;
f0a3c086 1936 if (nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 1937 enum ip_conntrack_events events;
5faa1f4c 1938
442fad94
FW		 1939 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
1940 return -EINVAL;
aa0c2c68
LZ		 1941 if (otuple.dst.protonum != rtuple.dst.protonum)
1942 return -EINVAL;
442fad94 1943
308ac914 1944 ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple,
f0a3c086 1945 &rtuple, u3);
7d367e06
JK		 1946 if (IS_ERR(ct))
1947 return PTR_ERR(ct);
1948
f0a3c086 1949 err = 0;
fecc1133 1950 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
97aae0df 1951 events = 1 << IPCT_RELATED;
fecc1133 1952 else
97aae0df 1953 events = 1 << IPCT_NEW;
fecc1133 1954
9b21f6a9
FW		 1955 if (cda[CTA_LABELS] &&
1956 ctnetlink_attach_labels(ct, cda) == 0)
1957 events |= (1 << IPCT_LABEL);
1958
858b3133
PM		 1959 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1960 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1961 (1 << IPCT_HELPER) |
1962 (1 << IPCT_PROTOINFO) |
41d73ec0 1963 (1 << IPCT_SEQADJ) |
a0891aa6 1964 (1 << IPCT_MARK) | events,
15e47304 1965 ct, NETLINK_CB(skb).portid,
a0891aa6 1966 nlmsg_report(nlh));
f0a3c086 1967 nf_ct_put(ct);
7d367e06 1968 }
5faa1f4c 1969
c1d10adb
PNA		 1970 return err;
1971 }
1972 /* implicit 'else' */
1973
c1d10adb 1974 err = -EEXIST;
7d367e06 1975 ct = nf_ct_tuplehash_to_ctrack(h);
ff4ca827 1976 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
19abb7b0
PNA		 1977 err = ctnetlink_change_conntrack(ct, cda);
1978 if (err == 0) {
858b3133
PM		 1979 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1980 (1 << IPCT_ASSURED) |
a0891aa6 1981 (1 << IPCT_HELPER) |
797a7d66 1982 (1 << IPCT_LABEL) |
a0891aa6 1983 (1 << IPCT_PROTOINFO) |
41d73ec0 1984 (1 << IPCT_SEQADJ) |
a0891aa6 1985 (1 << IPCT_MARK),
15e47304 1986 ct, NETLINK_CB(skb).portid,
a0891aa6 1987 nlmsg_report(nlh));
7d367e06 1988 }
ff4ca827 1989 }
c1d10adb 1990
7d367e06 1991 nf_ct_put(ct);
c1d10adb
PNA		 1992 return err;
1993}
1994
392025f8 1995static int
15e47304 1996ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 1997 __u16 cpu, const struct ip_conntrack_stat *st)
1998{
1999 struct nlmsghdr *nlh;
2000 struct nfgenmsg *nfmsg;
15e47304 2001 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 2002
dedb67c4
PNA		 2003 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
2004 IPCTNL_MSG_CT_GET_STATS_CPU);
15e47304 2005 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2006 if (nlh == NULL)
2007 goto nlmsg_failure;
2008
2009 nfmsg = nlmsg_data(nlh);
2010 nfmsg->nfgen_family = AF_UNSPEC;
2011 nfmsg->version = NFNETLINK_V0;
2012 nfmsg->res_id = htons(cpu);
2013
8e8118f8 2014 if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
392025f8
PNA		 2015 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
2016 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
392025f8
PNA		 2017 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
2018 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
2019 htonl(st->insert_failed)) ||
2020 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
2021 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
2022 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
2023 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
2024 htonl(st->search_restart)))
2025 goto nla_put_failure;
2026
2027 nlmsg_end(skb, nlh);
2028 return skb->len;
2029
2030nla_put_failure:
2031nlmsg_failure:
2032 nlmsg_cancel(skb, nlh);
2033 return -1;
2034}
2035
2036static int
2037ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2038{
2039 int cpu;
2040 struct net *net = sock_net(skb->sk);
2041
2042 if (cb->args[0] == nr_cpu_ids)
2043 return 0;
2044
2045 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2046 const struct ip_conntrack_stat *st;
2047
2048 if (!cpu_possible(cpu))
2049 continue;
2050
2051 st = per_cpu_ptr(net->ct.stat, cpu);
2052 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 2053 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2054 cb->nlh->nlmsg_seq,
2055 cpu, st) < 0)
2056 break;
2057 }
2058 cb->args[0] = cpu;
2059
2060 return skb->len;
2061}
2062
7b8002a1
PNA		 2063static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl,
2064 struct sk_buff *skb,
2065 const struct nlmsghdr *nlh,
2066 const struct nlattr * const cda[])
392025f8
PNA		 2067{
2068 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2069 struct netlink_dump_control c = {
2070 .dump = ctnetlink_ct_stat_cpu_dump,
2071 };
2072 return netlink_dump_start(ctnl, skb, nlh, &c);
2073 }
2074
2075 return 0;
2076}
2077
2078static int
15e47304 2079ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 2080 struct net *net)
2081{
2082 struct nlmsghdr *nlh;
2083 struct nfgenmsg *nfmsg;
15e47304 2084 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 2085 unsigned int nr_conntracks = atomic_read(&net->ct.count);
2086
dedb67c4 2087 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS);
15e47304 2088 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2089 if (nlh == NULL)
2090 goto nlmsg_failure;
2091
2092 nfmsg = nlmsg_data(nlh);
2093 nfmsg->nfgen_family = AF_UNSPEC;
2094 nfmsg->version = NFNETLINK_V0;
2095 nfmsg->res_id = 0;
2096
2097 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
2098 goto nla_put_failure;
2099
2100 nlmsg_end(skb, nlh);
2101 return skb->len;
2102
2103nla_put_failure:
2104nlmsg_failure:
2105 nlmsg_cancel(skb, nlh);
2106 return -1;
2107}
2108
7b8002a1
PNA		 2109static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl,
2110 struct sk_buff *skb, const struct nlmsghdr *nlh,
2111 const struct nlattr * const cda[])
392025f8
PNA		 2112{
2113 struct sk_buff *skb2;
2114 int err;
2115
2116 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2117 if (skb2 == NULL)
2118 return -ENOMEM;
2119
15e47304 2120 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
392025f8
PNA		 2121 nlh->nlmsg_seq,
2122 NFNL_MSG_TYPE(nlh->nlmsg_type),
2123 sock_net(skb->sk));
2124 if (err <= 0)
2125 goto free;
2126
15e47304 2127 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
392025f8
PNA		 2128 if (err < 0)
2129 goto out;
2130
2131 return 0;
2132
2133free:
2134 kfree_skb(skb2);
2135out:
2136 /* this avoids a loop in nfnetlink. */
2137 return err == -EAGAIN ? -ENOBUFS : err;
2138}
2139
bd077937
PNA		 2140static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2141 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2142 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2143 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2144 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2145 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2146 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2147 .len = NF_CT_HELPER_NAME_LEN - 1 },
2148 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2149 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2150 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2151 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2152 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2153};
2154
2155static struct nf_conntrack_expect *
2156ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2157 struct nf_conntrack_helper *helper,
2158 struct nf_conntrack_tuple *tuple,
2159 struct nf_conntrack_tuple *mask);
2160
83f3e94d 2161#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 2162static size_t
a4b4766c 2163ctnetlink_glue_build_size(const struct nf_conn *ct)
9cb01766
PNA		 2164{
2165 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2166 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2167 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2168 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2169 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2170 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2171 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2172 + nla_total_size(0) /* CTA_PROTOINFO */
2173 + nla_total_size(0) /* CTA_HELP */
2174 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2175 + ctnetlink_secctx_size(ct)
2176#ifdef CONFIG_NF_NAT_NEEDED
2177 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2178 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2179#endif
2180#ifdef CONFIG_NF_CONNTRACK_MARK
2181 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 2182#endif
2183#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 2184 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
9cb01766
PNA		 2185#endif
2186 + ctnetlink_proto_size(ct)
2187 ;
2188}
2189
224a0597 2190static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
a4b4766c 2191 enum ip_conntrack_info *ctinfo)
b7bd1809 2192{
ab8bc7ed 2193 return nf_ct_get(skb, ctinfo);
b7bd1809
PNA		 2194}
2195
a4b4766c 2196static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
9cb01766 2197{
308ac914 2198 const struct nf_conntrack_zone *zone;
9cb01766
PNA		 2199 struct nlattr *nest_parms;
2200
2201 rcu_read_lock();
deedb590
DB		 2202 zone = nf_ct_zone(ct);
2203
9cb01766
PNA		 2204 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2205 if (!nest_parms)
2206 goto nla_put_failure;
2207 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2208 goto nla_put_failure;
deedb590
DB		 2209 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2210 NF_CT_ZONE_DIR_ORIG) < 0)
2211 goto nla_put_failure;
9cb01766
PNA		 2212 nla_nest_end(skb, nest_parms);
2213
2214 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2215 if (!nest_parms)
2216 goto nla_put_failure;
2217 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2218 goto nla_put_failure;
deedb590
DB		 2219 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2220 NF_CT_ZONE_DIR_REPL) < 0)
2221 goto nla_put_failure;
9cb01766
PNA		 2222 nla_nest_end(skb, nest_parms);
2223
deedb590
DB		 2224 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
2225 NF_CT_DEFAULT_ZONE_DIR) < 0)
308ac914 2226 goto nla_put_failure;
9cb01766
PNA		 2227
2228 if (ctnetlink_dump_id(skb, ct) < 0)
2229 goto nla_put_failure;
2230
2231 if (ctnetlink_dump_status(skb, ct) < 0)
2232 goto nla_put_failure;
2233
2234 if (ctnetlink_dump_timeout(skb, ct) < 0)
2235 goto nla_put_failure;
2236
2237 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2238 goto nla_put_failure;
2239
2240 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2241 goto nla_put_failure;
2242
2243#ifdef CONFIG_NF_CONNTRACK_SECMARK
2244 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2245 goto nla_put_failure;
2246#endif
2247 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2248 goto nla_put_failure;
2249
2250 if ((ct->status & IPS_SEQ_ADJUST) &&
41d73ec0 2251 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
9cb01766
PNA		 2252 goto nla_put_failure;
2253
2254#ifdef CONFIG_NF_CONNTRACK_MARK
2255 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2256 goto nla_put_failure;
2257#endif
0ceabd83
FW		 2258 if (ctnetlink_dump_labels(skb, ct) < 0)
2259 goto nla_put_failure;
9cb01766
PNA		 2260 rcu_read_unlock();
2261 return 0;
2262
2263nla_put_failure:
2264 rcu_read_unlock();
2265 return -ENOSPC;
2266}
2267
b7bd1809 2268static int
a4b4766c
KM		 2269ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
2270 enum ip_conntrack_info ctinfo,
2271 u_int16_t ct_attr, u_int16_t ct_info_attr)
b7bd1809
PNA		 2272{
2273 struct nlattr *nest_parms;
2274
2275 nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED);
2276 if (!nest_parms)
2277 goto nla_put_failure;
2278
a4b4766c 2279 if (__ctnetlink_glue_build(skb, ct) < 0)
b7bd1809
PNA		 2280 goto nla_put_failure;
2281
2282 nla_nest_end(skb, nest_parms);
2283
2284 if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
2285 goto nla_put_failure;
2286
2287 return 0;
2288
2289nla_put_failure:
2290 return -ENOSPC;
2291}
2292
a963d710
KC		 2293static int
2294ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[])
2295{
2296 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
2297 unsigned long d = ct->status ^ status;
2298
2299 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
2300 /* SEEN_REPLY bit can only be set */
2301 return -EBUSY;
2302
2303 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
2304 /* ASSURED bit can only be set */
2305 return -EBUSY;
2306
2307 /* This check is less strict than ctnetlink_change_status()
2308 * because callers often flip IPS_EXPECTED bits when sending
2309 * an NFQA_CT attribute to the kernel. So ignore the
53b56da8
LZ		 2310 * unchangeable bits but do not error out. Also user programs
2311 * are allowed to clear the bits that they are allowed to change.
a963d710 2312 */
53b56da8 2313 __ctnetlink_change_status(ct, status, ~status);
a963d710
KC		 2314 return 0;
2315}
2316
9cb01766 2317static int
a4b4766c 2318ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
9cb01766
PNA		 2319{
2320 int err;
2321
2322 if (cda[CTA_TIMEOUT]) {
2323 err = ctnetlink_change_timeout(ct, cda);
2324 if (err < 0)
2325 return err;
2326 }
2327 if (cda[CTA_STATUS]) {
a963d710 2328 err = ctnetlink_update_status(ct, cda);
9cb01766
PNA		 2329 if (err < 0)
2330 return err;
2331 }
2332 if (cda[CTA_HELP]) {
2333 err = ctnetlink_change_helper(ct, cda);
2334 if (err < 0)
2335 return err;
2336 }
9b21f6a9
FW		 2337 if (cda[CTA_LABELS]) {
2338 err = ctnetlink_attach_labels(ct, cda);
2339 if (err < 0)
2340 return err;
2341 }
9cb01766 2342#if defined(CONFIG_NF_CONNTRACK_MARK)
534473c6
FW		 2343 if (cda[CTA_MARK]) {
2344 u32 mask = 0, mark, newmark;
2345 if (cda[CTA_MARK_MASK])
2346 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2347
2348 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2349 newmark = (ct->mark & mask) ^ mark;
2350 if (newmark != ct->mark)
2351 ct->mark = newmark;
2352 }
9cb01766
PNA		 2353#endif
2354 return 0;
2355}
2356
2357static int
a4b4766c 2358ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
9cb01766
PNA		 2359{
2360 struct nlattr *cda[CTA_MAX+1];
68e035c9 2361 int ret;
9cb01766 2362
fceb6435 2363 ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy, NULL);
130ffbc2
DB		 2364 if (ret < 0)
2365 return ret;
9cb01766 2366
88be4c09 2367 return ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
9cb01766
PNA		 2368}
2369
a4b4766c
KM		 2370static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
2371 const struct nf_conn *ct,
2372 struct nf_conntrack_tuple *tuple,
2373 struct nf_conntrack_tuple *mask)
bd077937
PNA		 2374{
2375 int err;
2376
2377 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
deedb590 2378 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2379 if (err < 0)
2380 return err;
2381
2382 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
deedb590 2383 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2384}
2385
2386static int
a4b4766c
KM		 2387ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2388 u32 portid, u32 report)
bd077937
PNA		 2389{
2390 struct nlattr *cda[CTA_EXPECT_MAX+1];
2391 struct nf_conntrack_tuple tuple, mask;
b7e092c0 2392 struct nf_conntrack_helper *helper = NULL;
bd077937
PNA		 2393 struct nf_conntrack_expect *exp;
2394 int err;
2395
fceb6435
JB		 2396 err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy,
2397 NULL);
bd077937
PNA		 2398 if (err < 0)
2399 return err;
2400
a4b4766c
KM		 2401 err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
2402 ct, &tuple, &mask);
bd077937
PNA		 2403 if (err < 0)
2404 return err;
2405
2406 if (cda[CTA_EXPECT_HELP_NAME]) {
2407 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2408
2409 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2410 nf_ct_protonum(ct));
2411 if (helper == NULL)
2412 return -EOPNOTSUPP;
2413 }
2414
2415 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2416 helper, &tuple, &mask);
2417 if (IS_ERR(exp))
2418 return PTR_ERR(exp);
2419
2420 err = nf_ct_expect_related_report(exp, portid, report);
b18bcb00
LZ		 2421 nf_ct_expect_put(exp);
2422 return err;
bd077937
PNA		 2423}
2424
a4b4766c
KM		 2425static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
2426 enum ip_conntrack_info ctinfo, int diff)
b7bd1809
PNA		 2427{
2428 if (!(ct->status & IPS_NAT_MASK))
2429 return;
2430
2431 nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
2432}
2433
a4b4766c
KM		 2434static struct nfnl_ct_hook ctnetlink_glue_hook = {
2435 .get_ct = ctnetlink_glue_get_ct,
2436 .build_size = ctnetlink_glue_build_size,
2437 .build = ctnetlink_glue_build,
2438 .parse = ctnetlink_glue_parse,
2439 .attach_expect = ctnetlink_glue_attach_expect,
2440 .seq_adjust = ctnetlink_glue_seqadj,
9cb01766 2441};
83f3e94d 2442#endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
9cb01766 2443
601e68e1
YH		 2444/***********************************************************************
2445 * EXPECT
2446 ***********************************************************************/
c1d10adb 2447
4054ff45
PNA		 2448static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2449 const struct nf_conntrack_tuple *tuple,
2450 enum ctattr_expect type)
c1d10adb 2451{
df6fb868 2452 struct nlattr *nest_parms;
601e68e1 2453
df6fb868
PM		 2454 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2455 if (!nest_parms)
2456 goto nla_put_failure;
c1d10adb 2457 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2458 goto nla_put_failure;
2459 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2460
2461 return 0;
2462
df6fb868 2463nla_put_failure:
c1d10adb 2464 return -1;
601e68e1 2465}
c1d10adb 2466
4054ff45
PNA		 2467static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
2468 const struct nf_conntrack_tuple *tuple,
2469 const struct nf_conntrack_tuple_mask *mask)
1cde6436
PNA		 2470{
2471 int ret;
2472 struct nf_conntrack_l3proto *l3proto;
605dcad6 2473 struct nf_conntrack_l4proto *l4proto;
d4156e8c 2474 struct nf_conntrack_tuple m;
df6fb868 2475 struct nlattr *nest_parms;
d4156e8c
PM		 2476
2477 memset(&m, 0xFF, sizeof(m));
d4156e8c 2478 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 2479 m.src.u.all = mask->src.u.all;
2480 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2481
df6fb868
PM		 2482 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2483 if (!nest_parms)
2484 goto nla_put_failure;
1cde6436 2485
3b988ece 2486 rcu_read_lock();
528a3a6f 2487 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 2488 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 2489 if (ret >= 0) {
2490 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2491 tuple->dst.protonum);
d4156e8c 2492 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2493 }
2494 rcu_read_unlock();
2495
1cde6436 2496 if (unlikely(ret < 0))
df6fb868 2497 goto nla_put_failure;
1cde6436 2498
df6fb868 2499 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2500
2501 return 0;
2502
df6fb868 2503nla_put_failure:
1cde6436
PNA		 2504 return -1;
2505}
2506
c7232c99
PM		 2507static const union nf_inet_addr any_addr;
2508
bb5cf80e 2509static int
c1d10adb 2510ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2511 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2512{
2513 struct nf_conn *master = exp->master;
c1216382 2514 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 2515 struct nf_conn_help *help;
076a0ca0
PNA		 2516#ifdef CONFIG_NF_NAT_NEEDED
2517 struct nlattr *nest_parms;
2518 struct nf_conntrack_tuple nat_tuple = {};
2519#endif
544d5c7d
PNA		 2520 struct nf_ct_helper_expectfn *expfn;
2521
d978e5da
PM		 2522 if (timeout < 0)
2523 timeout = 0;
c1d10adb
PNA		 2524
2525 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 2526 goto nla_put_failure;
1cde6436 2527 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 2528 goto nla_put_failure;
c1d10adb
PNA		 2529 if (ctnetlink_exp_dump_tuple(skb,
2530 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2531 CTA_EXPECT_MASTER) < 0)
df6fb868 2532 goto nla_put_failure;
601e68e1 2533
076a0ca0 2534#ifdef CONFIG_NF_NAT_NEEDED
c7232c99
PM		 2535 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2536 exp->saved_proto.all) {
076a0ca0
PNA		 2537 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2538 if (!nest_parms)
2539 goto nla_put_failure;
2540
cc1eb431
DM		 2541 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2542 goto nla_put_failure;
076a0ca0
PNA		 2543
2544 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 2545 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 2546 nat_tuple.dst.protonum = nf_ct_protonum(master);
2547 nat_tuple.src.u = exp->saved_proto;
2548
2549 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2550 CTA_EXPECT_NAT_TUPLE) < 0)
2551 goto nla_put_failure;
2552 nla_nest_end(skb, nest_parms);
2553 }
2554#endif
cc1eb431
DM		 2555 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2556 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2557 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2558 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2559 goto nla_put_failure;
bc01befd
PNA		 2560 help = nfct_help(master);
2561 if (help) {
2562 struct nf_conntrack_helper *helper;
2563
2564 helper = rcu_dereference(help->helper);
cc1eb431
DM		 2565 if (helper &&
2566 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2567 goto nla_put_failure;
bc01befd 2568 }
544d5c7d 2569 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 2570 if (expfn != NULL &&
2571 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2572 goto nla_put_failure;
c1d10adb
PNA		 2573
2574 return 0;
601e68e1 2575
df6fb868 2576nla_put_failure:
c1d10adb
PNA		 2577 return -1;
2578}
2579
2580static int
15e47304 2581ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 2582 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2583{
2584 struct nlmsghdr *nlh;
2585 struct nfgenmsg *nfmsg;
15e47304 2586 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb 2587
dedb67c4 2588 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event);
15e47304 2589 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 2590 if (nlh == NULL)
2591 goto nlmsg_failure;
c1d10adb 2592
96bcf938 2593 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2594 nfmsg->nfgen_family = exp->tuple.src.l3num;
2595 nfmsg->version = NFNETLINK_V0;
2596 nfmsg->res_id = 0;
2597
2598 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2599 goto nla_put_failure;
c1d10adb 2600
96bcf938 2601 nlmsg_end(skb, nlh);
c1d10adb
PNA		 2602 return skb->len;
2603
2604nlmsg_failure:
df6fb868 2605nla_put_failure:
96bcf938 2606 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 2607 return -1;
2608}
2609
2610#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2611static int
2612ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 2613{
9592a5c0
AD		 2614 struct nf_conntrack_expect *exp = item->exp;
2615 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 2616 struct nlmsghdr *nlh;
2617 struct nfgenmsg *nfmsg;
c1d10adb 2618 struct sk_buff *skb;
ebbf41df 2619 unsigned int type, group;
c1d10adb
PNA		 2620 int flags = 0;
2621
ebbf41df
PNA		 2622 if (events & (1 << IPEXP_DESTROY)) {
2623 type = IPCTNL_MSG_EXP_DELETE;
2624 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2625 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 2626 type = IPCTNL_MSG_EXP_NEW;
2627 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 2628 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 2629 } else
e34d5c1a 2630 return 0;
c1d10adb 2631
ebbf41df 2632 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 2633 return 0;
b3a27bfb 2634
96bcf938
PNA		 2635 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2636 if (skb == NULL)
150ace0d 2637 goto errout;
c1d10adb 2638
dedb67c4 2639 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type);
15e47304 2640 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 2641 if (nlh == NULL)
2642 goto nlmsg_failure;
c1d10adb 2643
96bcf938 2644 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2645 nfmsg->nfgen_family = exp->tuple.src.l3num;
2646 nfmsg->version = NFNETLINK_V0;
2647 nfmsg->res_id = 0;
2648
528a3a6f 2649 rcu_read_lock();
c1d10adb 2650 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2651 goto nla_put_failure;
528a3a6f 2652 rcu_read_unlock();
c1d10adb 2653
96bcf938 2654 nlmsg_end(skb, nlh);
15e47304 2655 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 2656 return 0;
c1d10adb 2657
df6fb868 2658nla_put_failure:
528a3a6f 2659 rcu_read_unlock();
96bcf938 2660 nlmsg_cancel(skb, nlh);
528a3a6f 2661nlmsg_failure:
c1d10adb 2662 kfree_skb(skb);
150ace0d 2663errout:
9592a5c0 2664 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 2665 return 0;
c1d10adb
PNA		 2666}
2667#endif
cf6994c2
PM		 2668static int ctnetlink_exp_done(struct netlink_callback *cb)
2669{
31f15875
PM		 2670 if (cb->args[1])
2671 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2672 return 0;
2673}
c1d10adb
PNA		 2674
2675static int
2676ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2677{
9592a5c0 2678 struct net *net = sock_net(skb->sk);
cf6994c2 2679 struct nf_conntrack_expect *exp, *last;
96bcf938 2680 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 2681 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2682
7d0742da 2683 rcu_read_lock();
31f15875
PM		 2684 last = (struct nf_conntrack_expect *)cb->args[1];
2685 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2686restart:
7cddd967
LZ		 2687 hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]],
2688 hnode) {
31f15875 2689 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2690 continue;
03d7dc5c
FW		 2691
2692 if (!net_eq(nf_ct_net(exp->master), net))
2693 continue;
2694
31f15875
PM		 2695 if (cb->args[1]) {
2696 if (exp != last)
2697 continue;
2698 cb->args[1] = 0;
2699 }
8b0a231d 2700 if (ctnetlink_exp_fill_info(skb,
15e47304 2701 NETLINK_CB(cb->skb).portid,
31f15875
PM		 2702 cb->nlh->nlmsg_seq,
2703 IPCTNL_MSG_EXP_NEW,
8b0a231d 2704 exp) < 0) {
b54ab92b 2705 if (!refcount_inc_not_zero(&exp->use))
7d0742da 2706 continue;
31f15875
PM		 2707 cb->args[1] = (unsigned long)exp;
2708 goto out;
2709 }
cf6994c2 2710 }
31f15875
PM		 2711 if (cb->args[1]) {
2712 cb->args[1] = 0;
2713 goto restart;
cf6994c2
PM		 2714 }
2715 }
601e68e1 2716out:
7d0742da 2717 rcu_read_unlock();
cf6994c2
PM		 2718 if (last)
2719 nf_ct_expect_put(last);
c1d10adb 2720
c1d10adb
PNA		 2721 return skb->len;
2722}
2723
e844a928
PNA		 2724static int
2725ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2726{
2727 struct nf_conntrack_expect *exp, *last;
2728 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2729 struct nf_conn *ct = cb->data;
2730 struct nf_conn_help *help = nfct_help(ct);
2731 u_int8_t l3proto = nfmsg->nfgen_family;
2732
2733 if (cb->args[0])
2734 return 0;
2735
2736 rcu_read_lock();
2737 last = (struct nf_conntrack_expect *)cb->args[1];
2738restart:
7cddd967 2739 hlist_for_each_entry_rcu(exp, &help->expectations, lnode) {
e844a928
PNA		 2740 if (l3proto && exp->tuple.src.l3num != l3proto)
2741 continue;
2742 if (cb->args[1]) {
2743 if (exp != last)
2744 continue;
2745 cb->args[1] = 0;
2746 }
2747 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2748 cb->nlh->nlmsg_seq,
2749 IPCTNL_MSG_EXP_NEW,
2750 exp) < 0) {
b54ab92b 2751 if (!refcount_inc_not_zero(&exp->use))
e844a928
PNA		 2752 continue;
2753 cb->args[1] = (unsigned long)exp;
2754 goto out;
2755 }
2756 }
2757 if (cb->args[1]) {
2758 cb->args[1] = 0;
2759 goto restart;
2760 }
2761 cb->args[0] = 1;
2762out:
2763 rcu_read_unlock();
2764 if (last)
2765 nf_ct_expect_put(last);
2766
2767 return skb->len;
2768}
2769
7b8002a1
PNA		 2770static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
2771 struct sk_buff *skb,
e844a928
PNA		 2772 const struct nlmsghdr *nlh,
2773 const struct nlattr * const cda[])
2774{
2775 int err;
e844a928
PNA		 2776 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2777 u_int8_t u3 = nfmsg->nfgen_family;
2778 struct nf_conntrack_tuple tuple;
2779 struct nf_conntrack_tuple_hash *h;
2780 struct nf_conn *ct;
308ac914 2781 struct nf_conntrack_zone zone;
e844a928
PNA		 2782 struct netlink_dump_control c = {
2783 .dump = ctnetlink_exp_ct_dump_table,
2784 .done = ctnetlink_exp_done,
2785 };
2786
deedb590
DB		 2787 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2788 u3, NULL);
e844a928
PNA		 2789 if (err < 0)
2790 return err;
2791
308ac914
DB		 2792 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2793 if (err < 0)
2794 return err;
e844a928 2795
308ac914 2796 h = nf_conntrack_find_get(net, &zone, &tuple);
e844a928
PNA		 2797 if (!h)
2798 return -ENOENT;
2799
2800 ct = nf_ct_tuplehash_to_ctrack(h);
207df815
LZ		 2801 /* No expectation linked to this connection tracking. */
2802 if (!nfct_help(ct)) {
2803 nf_ct_put(ct);
2804 return 0;
2805 }
2806
e844a928
PNA		 2807 c.data = ct;
2808
2809 err = netlink_dump_start(ctnl, skb, nlh, &c);
2810 nf_ct_put(ct);
2811
2812 return err;
2813}
2814
7b8002a1
PNA		 2815static int ctnetlink_get_expect(struct net *net, struct sock *ctnl,
2816 struct sk_buff *skb, const struct nlmsghdr *nlh,
2817 const struct nlattr * const cda[])
c1d10adb
PNA		 2818{
2819 struct nf_conntrack_tuple tuple;
2820 struct nf_conntrack_expect *exp;
2821 struct sk_buff *skb2;
96bcf938 2822 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2823 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 2824 struct nf_conntrack_zone zone;
ef00f89f 2825 int err;
c1d10adb 2826
b8f3ab42 2827 if (nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928 2828 if (cda[CTA_EXPECT_MASTER])
7b8002a1 2829 return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda);
e844a928
PNA		 2830 else {
2831 struct netlink_dump_control c = {
2832 .dump = ctnetlink_exp_dump_table,
2833 .done = ctnetlink_exp_done,
2834 };
2835 return netlink_dump_start(ctnl, skb, nlh, &c);
2836 }
c1d10adb
PNA		 2837 }
2838
ef00f89f
PM		 2839 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2840 if (err < 0)
2841 return err;
2842
35dba1d7 2843 if (cda[CTA_EXPECT_TUPLE])
deedb590
DB		 2844 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2845 u3, NULL);
35dba1d7 2846 else if (cda[CTA_EXPECT_MASTER])
deedb590
DB		 2847 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2848 u3, NULL);
c1d10adb
PNA		 2849 else
2850 return -EINVAL;
2851
2852 if (err < 0)
2853 return err;
2854
308ac914 2855 exp = nf_ct_expect_find_get(net, &zone, &tuple);
c1d10adb
PNA		 2856 if (!exp)
2857 return -ENOENT;
2858
df6fb868 2859 if (cda[CTA_EXPECT_ID]) {
77236b6e 2860 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2861 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2862 nf_ct_expect_put(exp);
c1d10adb
PNA		 2863 return -ENOENT;
2864 }
601e68e1 2865 }
c1d10adb
PNA		 2866
2867 err = -ENOMEM;
96bcf938 2868 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2869 if (skb2 == NULL) {
2870 nf_ct_expect_put(exp);
c1d10adb 2871 goto out;
81378f72 2872 }
4e9b8269 2873
528a3a6f 2874 rcu_read_lock();
15e47304 2875 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
8b0a231d 2876 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2877 rcu_read_unlock();
81378f72 2878 nf_ct_expect_put(exp);
c1d10adb
PNA		 2879 if (err <= 0)
2880 goto free;
2881
15e47304 2882 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
81378f72
PNA		 2883 if (err < 0)
2884 goto out;
c1d10adb 2885
81378f72 2886 return 0;
c1d10adb
PNA		 2887
2888free:
2889 kfree_skb(skb2);
2890out:
81378f72
PNA		 2891 /* this avoids a loop in nfnetlink. */
2892 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2893}
2894
7b8002a1
PNA		 2895static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
2896 struct sk_buff *skb, const struct nlmsghdr *nlh,
2897 const struct nlattr * const cda[])
c1d10adb 2898{
31f15875 2899 struct nf_conntrack_expect *exp;
c1d10adb 2900 struct nf_conntrack_tuple tuple;
96bcf938 2901 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
b67bfe0d 2902 struct hlist_node *next;
c1d10adb 2903 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 2904 struct nf_conntrack_zone zone;
31f15875 2905 unsigned int i;
c1d10adb
PNA		 2906 int err;
2907
df6fb868 2908 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2909 /* delete a single expect by tuple */
ef00f89f
PM		 2910 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2911 if (err < 0)
2912 return err;
2913
deedb590
DB		 2914 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2915 u3, NULL);
c1d10adb
PNA		 2916 if (err < 0)
2917 return err;
2918
2919 /* bump usage count to 2 */
308ac914 2920 exp = nf_ct_expect_find_get(net, &zone, &tuple);
c1d10adb
PNA		 2921 if (!exp)
2922 return -ENOENT;
2923
df6fb868 2924 if (cda[CTA_EXPECT_ID]) {
77236b6e 2925 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2926 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2927 nf_ct_expect_put(exp);
c1d10adb
PNA		 2928 return -ENOENT;
2929 }
2930 }
2931
2932 /* after list removal, usage count == 1 */
ca7433df 2933 spin_lock_bh(&nf_conntrack_expect_lock);
ebbf41df 2934 if (del_timer(&exp->timeout)) {
15e47304 2935 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
ebbf41df
PNA		 2936 nlmsg_report(nlh));
2937 nf_ct_expect_put(exp);
2938 }
ca7433df 2939 spin_unlock_bh(&nf_conntrack_expect_lock);
601e68e1 2940 /* have to put what we 'get' above.
c1d10adb 2941 * after this line usage count == 0 */
6823645d 2942 nf_ct_expect_put(exp);
df6fb868
PM		 2943 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2944 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
31f15875 2945 struct nf_conn_help *m_help;
c1d10adb
PNA		 2946
2947 /* delete all expectations for this helper */
ca7433df 2948 spin_lock_bh(&nf_conntrack_expect_lock);
31f15875 2949 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2950 hlist_for_each_entry_safe(exp, next,
0a93aaed 2951 &nf_ct_expect_hash[i],
31f15875 2952 hnode) {
03d7dc5c
FW		 2953
2954 if (!net_eq(nf_ct_exp_net(exp), net))
2955 continue;
2956
31f15875 2957 m_help = nfct_help(exp->master);
794e6871
PM		 2958 if (!strcmp(m_help->helper->name, name) &&
2959 del_timer(&exp->timeout)) {
ebbf41df 2960 nf_ct_unlink_expect_report(exp,
15e47304 2961 NETLINK_CB(skb).portid,
ebbf41df 2962 nlmsg_report(nlh));
31f15875
PM		 2963 nf_ct_expect_put(exp);
2964 }
c1d10adb
PNA		 2965 }
2966 }
ca7433df 2967 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb
PNA		 2968 } else {
2969 /* This basically means we have to flush everything*/
ca7433df 2970 spin_lock_bh(&nf_conntrack_expect_lock);
31f15875 2971 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2972 hlist_for_each_entry_safe(exp, next,
0a93aaed 2973 &nf_ct_expect_hash[i],
31f15875 2974 hnode) {
03d7dc5c
FW		 2975
2976 if (!net_eq(nf_ct_exp_net(exp), net))
2977 continue;
2978
31f15875 2979 if (del_timer(&exp->timeout)) {
ebbf41df 2980 nf_ct_unlink_expect_report(exp,
15e47304 2981 NETLINK_CB(skb).portid,
ebbf41df 2982 nlmsg_report(nlh));
31f15875
PM		 2983 nf_ct_expect_put(exp);
2984 }
c1d10adb
PNA		 2985 }
2986 }
ca7433df 2987 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb
PNA		 2988 }
2989
2990 return 0;
2991}
2992static int
39938324
PM		 2993ctnetlink_change_expect(struct nf_conntrack_expect *x,
2994 const struct nlattr * const cda[])
c1d10adb 2995{
9768e1ac
KW		 2996 if (cda[CTA_EXPECT_TIMEOUT]) {
2997 if (!del_timer(&x->timeout))
2998 return -ETIME;
2999
3000 x->timeout.expires = jiffies +
3001 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
3002 add_timer(&x->timeout);
3003 }
3004 return 0;
c1d10adb
PNA		 3005}
3006
076a0ca0
PNA		 3007static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
3008 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
3009 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
3010};
3011
3012static int
3013ctnetlink_parse_expect_nat(const struct nlattr *attr,
3014 struct nf_conntrack_expect *exp,
3015 u_int8_t u3)
3016{
3017#ifdef CONFIG_NF_NAT_NEEDED
3018 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
3019 struct nf_conntrack_tuple nat_tuple = {};
3020 int err;
3021
fceb6435
JB		 3022 err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr,
3023 exp_nat_nla_policy, NULL);
130ffbc2
DB		 3024 if (err < 0)
3025 return err;
076a0ca0
PNA		 3026
3027 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
3028 return -EINVAL;
3029
3030 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
deedb590
DB		 3031 &nat_tuple, CTA_EXPECT_NAT_TUPLE,
3032 u3, NULL);
076a0ca0
PNA		 3033 if (err < 0)
3034 return err;
3035
c7232c99 3036 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 3037 exp->saved_proto = nat_tuple.src.u;
3038 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
3039
3040 return 0;
3041#else
3042 return -EOPNOTSUPP;
3043#endif
3044}
3045
0ef71ee1
PNA		 3046static struct nf_conntrack_expect *
3047ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
3048 struct nf_conntrack_helper *helper,
3049 struct nf_conntrack_tuple *tuple,
3050 struct nf_conntrack_tuple *mask)
c1d10adb 3051{
0ef71ee1 3052 u_int32_t class = 0;
c1d10adb 3053 struct nf_conntrack_expect *exp;
dc808fe2 3054 struct nf_conn_help *help;
0ef71ee1 3055 int err;
660fdb2a 3056
2c62e0bc
GF		 3057 help = nfct_help(ct);
3058 if (!help)
3059 return ERR_PTR(-EOPNOTSUPP);
3060
b8c5e52c
PNA		 3061 if (cda[CTA_EXPECT_CLASS] && helper) {
3062 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
0ef71ee1
PNA		 3063 if (class > helper->expect_class_max)
3064 return ERR_PTR(-EINVAL);
b8c5e52c 3065 }
6823645d 3066 exp = nf_ct_expect_alloc(ct);
0ef71ee1
PNA		 3067 if (!exp)
3068 return ERR_PTR(-ENOMEM);
3069
2c62e0bc
GF		 3070 if (cda[CTA_EXPECT_FLAGS]) {
3071 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3072 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
bc01befd 3073 } else {
2c62e0bc 3074 exp->flags = 0;
bc01befd 3075 }
544d5c7d
PNA		 3076 if (cda[CTA_EXPECT_FN]) {
3077 const char *name = nla_data(cda[CTA_EXPECT_FN]);
3078 struct nf_ct_helper_expectfn *expfn;
3079
3080 expfn = nf_ct_helper_expectfn_find_by_name(name);
3081 if (expfn == NULL) {
3082 err = -EINVAL;
3083 goto err_out;
3084 }
3085 exp->expectfn = expfn->expectfn;
3086 } else
3087 exp->expectfn = NULL;
601e68e1 3088
b8c5e52c 3089 exp->class = class;
c1d10adb 3090 exp->master = ct;
660fdb2a 3091 exp->helper = helper;
0ef71ee1
PNA		 3092 exp->tuple = *tuple;
3093 exp->mask.src.u3 = mask->src.u3;
3094 exp->mask.src.u.all = mask->src.u.all;
c1d10adb 3095
076a0ca0
PNA		 3096 if (cda[CTA_EXPECT_NAT]) {
3097 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
0ef71ee1 3098 exp, nf_ct_l3num(ct));
076a0ca0
PNA		 3099 if (err < 0)
3100 goto err_out;
3101 }
0ef71ee1 3102 return exp;
076a0ca0 3103err_out:
6823645d 3104 nf_ct_expect_put(exp);
0ef71ee1
PNA		 3105 return ERR_PTR(err);
3106}
3107
3108static int
308ac914
DB		 3109ctnetlink_create_expect(struct net *net,
3110 const struct nf_conntrack_zone *zone,
0ef71ee1
PNA		 3111 const struct nlattr * const cda[],
3112 u_int8_t u3, u32 portid, int report)
3113{
3114 struct nf_conntrack_tuple tuple, mask, master_tuple;
3115 struct nf_conntrack_tuple_hash *h = NULL;
3116 struct nf_conntrack_helper *helper = NULL;
3117 struct nf_conntrack_expect *exp;
3118 struct nf_conn *ct;
3119 int err;
3120
3121 /* caller guarantees that those three CTA_EXPECT_* exist */
deedb590
DB		 3122 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3123 u3, NULL);
0ef71ee1
PNA		 3124 if (err < 0)
3125 return err;
deedb590
DB		 3126 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
3127 u3, NULL);
0ef71ee1
PNA		 3128 if (err < 0)
3129 return err;
deedb590
DB		 3130 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
3131 u3, NULL);
0ef71ee1
PNA		 3132 if (err < 0)
3133 return err;
3134
3135 /* Look for master conntrack of this expectation */
3136 h = nf_conntrack_find_get(net, zone, &master_tuple);
3137 if (!h)
3138 return -ENOENT;
3139 ct = nf_ct_tuplehash_to_ctrack(h);
3140
8b5995d0 3141 rcu_read_lock();
0ef71ee1
PNA		 3142 if (cda[CTA_EXPECT_HELP_NAME]) {
3143 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
3144
3145 helper = __nf_conntrack_helper_find(helpname, u3,
3146 nf_ct_protonum(ct));
3147 if (helper == NULL) {
8b5995d0 3148 rcu_read_unlock();
0ef71ee1
PNA		 3149#ifdef CONFIG_MODULES
3150 if (request_module("nfct-helper-%s", helpname) < 0) {
3151 err = -EOPNOTSUPP;
3152 goto err_ct;
3153 }
8b5995d0 3154 rcu_read_lock();
0ef71ee1
PNA		 3155 helper = __nf_conntrack_helper_find(helpname, u3,
3156 nf_ct_protonum(ct));
3157 if (helper) {
3158 err = -EAGAIN;
8b5995d0 3159 goto err_rcu;
0ef71ee1 3160 }
8b5995d0 3161 rcu_read_unlock();
0ef71ee1
PNA		 3162#endif
3163 err = -EOPNOTSUPP;
3164 goto err_ct;
3165 }
3166 }
3167
3168 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
3169 if (IS_ERR(exp)) {
3170 err = PTR_ERR(exp);
8b5995d0 3171 goto err_rcu;
0ef71ee1
PNA		 3172 }
3173
3174 err = nf_ct_expect_related_report(exp, portid, report);
0ef71ee1 3175 nf_ct_expect_put(exp);
8b5995d0
GF		 3176err_rcu:
3177 rcu_read_unlock();
0ef71ee1
PNA		 3178err_ct:
3179 nf_ct_put(ct);
c1d10adb
PNA		 3180 return err;
3181}
3182
7b8002a1
PNA		 3183static int ctnetlink_new_expect(struct net *net, struct sock *ctnl,
3184 struct sk_buff *skb, const struct nlmsghdr *nlh,
3185 const struct nlattr * const cda[])
c1d10adb
PNA		 3186{
3187 struct nf_conntrack_tuple tuple;
3188 struct nf_conntrack_expect *exp;
96bcf938 3189 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 3190 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 3191 struct nf_conntrack_zone zone;
ef00f89f 3192 int err;
c1d10adb 3193
df6fb868
PM		 3194 if (!cda[CTA_EXPECT_TUPLE]
3195 || !cda[CTA_EXPECT_MASK]
3196 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 3197 return -EINVAL;
3198
ef00f89f
PM		 3199 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3200 if (err < 0)
3201 return err;
3202
deedb590
DB		 3203 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3204 u3, NULL);
c1d10adb
PNA		 3205 if (err < 0)
3206 return err;
3207
ca7433df 3208 spin_lock_bh(&nf_conntrack_expect_lock);
308ac914 3209 exp = __nf_ct_expect_find(net, &zone, &tuple);
c1d10adb 3210 if (!exp) {
ca7433df 3211 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3212 err = -ENOENT;
19abb7b0 3213 if (nlh->nlmsg_flags & NLM_F_CREATE) {
308ac914 3214 err = ctnetlink_create_expect(net, &zone, cda, u3,
15e47304 3215 NETLINK_CB(skb).portid,
19abb7b0
PNA		 3216 nlmsg_report(nlh));
3217 }
c1d10adb
PNA		 3218 return err;
3219 }
3220
3221 err = -EEXIST;
3222 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
3223 err = ctnetlink_change_expect(exp, cda);
ca7433df 3224 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3225
c1d10adb
PNA		 3226 return err;
3227}
3228
392025f8 3229static int
15e47304 3230ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 3231 const struct ip_conntrack_stat *st)
3232{
3233 struct nlmsghdr *nlh;
3234 struct nfgenmsg *nfmsg;
15e47304 3235 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 3236
dedb67c4
PNA		 3237 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
3238 IPCTNL_MSG_EXP_GET_STATS_CPU);
15e47304 3239 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 3240 if (nlh == NULL)
3241 goto nlmsg_failure;
3242
3243 nfmsg = nlmsg_data(nlh);
3244 nfmsg->nfgen_family = AF_UNSPEC;
3245 nfmsg->version = NFNETLINK_V0;
3246 nfmsg->res_id = htons(cpu);
3247
3248 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3249 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3250 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3251 goto nla_put_failure;
3252
3253 nlmsg_end(skb, nlh);
3254 return skb->len;
3255
3256nla_put_failure:
3257nlmsg_failure:
3258 nlmsg_cancel(skb, nlh);
3259 return -1;
3260}
3261
3262static int
3263ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3264{
3265 int cpu;
3266 struct net *net = sock_net(skb->sk);
3267
3268 if (cb->args[0] == nr_cpu_ids)
3269 return 0;
3270
3271 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3272 const struct ip_conntrack_stat *st;
3273
3274 if (!cpu_possible(cpu))
3275 continue;
3276
3277 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 3278 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 3279 cb->nlh->nlmsg_seq,
3280 cpu, st) < 0)
3281 break;
3282 }
3283 cb->args[0] = cpu;
3284
3285 return skb->len;
3286}
3287
7b8002a1
PNA		 3288static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl,
3289 struct sk_buff *skb,
3290 const struct nlmsghdr *nlh,
3291 const struct nlattr * const cda[])
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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