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netfilter: tproxy: remove nf_tproxy_core.h
[deliverable/linux.git] / net / netfilter / nf_conntrack_netlink.c
CommitLineData
c1d10adb
PNA		 1/* Connection tracking via netlink socket. Allows for user space
2 * protocol helpers and general trouble making from userspace.
3 *
4 * (C) 2001 by Jay Schulist <jschlst@samba.org>
dc808fe2 5 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
c1d10adb 6 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
392025f8 7 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
c1d10adb 8 *
601e68e1 9 * Initial connection tracking via netlink development funded and
c1d10adb
PNA		 10 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
11 *
12 * Further development of this code funded by Astaro AG (http://www.astaro.com)
13 *
14 * This software may be used and distributed according to the terms
15 * of the GNU General Public License, incorporated herein by reference.
c1d10adb
PNA		 16 */
17
18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
711bbdd6 21#include <linux/rculist.h>
ea781f19 22#include <linux/rculist_nulls.h>
c1d10adb
PNA		 23#include <linux/types.h>
24#include <linux/timer.h>
1cc63249 25#include <linux/security.h>
c1d10adb
PNA		 26#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/netlink.h>
29#include <linux/spinlock.h>
40a839fd 30#include <linux/interrupt.h>
5a0e3ad6 31#include <linux/slab.h>
c1d10adb
PNA		 32
33#include <linux/netfilter.h>
dc5fc579 34#include <net/netlink.h>
9592a5c0 35#include <net/sock.h>
c1d10adb
PNA		 36#include <net/netfilter/nf_conntrack.h>
37#include <net/netfilter/nf_conntrack_core.h>
77ab9cff 38#include <net/netfilter/nf_conntrack_expect.h>
c1d10adb
PNA		 39#include <net/netfilter/nf_conntrack_helper.h>
40#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6 41#include <net/netfilter/nf_conntrack_l4proto.h>
5b1158e9 42#include <net/netfilter/nf_conntrack_tuple.h>
58401572 43#include <net/netfilter/nf_conntrack_acct.h>
ef00f89f 44#include <net/netfilter/nf_conntrack_zones.h>
a992ca2a 45#include <net/netfilter/nf_conntrack_timestamp.h>
c539f017 46#include <net/netfilter/nf_conntrack_labels.h>
5b1158e9
JK		 47#ifdef CONFIG_NF_NAT_NEEDED
48#include <net/netfilter/nf_nat_core.h>
c7232c99 49#include <net/netfilter/nf_nat_l4proto.h>
8c88f87c 50#include <net/netfilter/nf_nat_helper.h>
5b1158e9 51#endif
c1d10adb
PNA		 52
53#include <linux/netfilter/nfnetlink.h>
54#include <linux/netfilter/nfnetlink_conntrack.h>
55
56MODULE_LICENSE("GPL");
57
dc808fe2 58static char __initdata version[] = "0.93";
c1d10adb 59
c1d10adb 60static inline int
601e68e1 61ctnetlink_dump_tuples_proto(struct sk_buff *skb,
1cde6436 62 const struct nf_conntrack_tuple *tuple,
605dcad6 63 struct nf_conntrack_l4proto *l4proto)
c1d10adb 64{
c1d10adb 65 int ret = 0;
df6fb868 66 struct nlattr *nest_parms;
c1d10adb 67
df6fb868
PM		 68 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
69 if (!nest_parms)
70 goto nla_put_failure;
cc1eb431
DM		 71 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
72 goto nla_put_failure;
c1d10adb 73
fdf70832
PM		 74 if (likely(l4proto->tuple_to_nlattr))
75 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 76
df6fb868 77 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 78
79 return ret;
80
df6fb868 81nla_put_failure:
c1d10adb
PNA		 82 return -1;
83}
84
85static inline int
1cde6436
PNA		 86ctnetlink_dump_tuples_ip(struct sk_buff *skb,
87 const struct nf_conntrack_tuple *tuple,
88 struct nf_conntrack_l3proto *l3proto)
c1d10adb 89{
c1d10adb 90 int ret = 0;
df6fb868
PM		 91 struct nlattr *nest_parms;
92
93 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
94 if (!nest_parms)
95 goto nla_put_failure;
1cde6436 96
fdf70832
PM		 97 if (likely(l3proto->tuple_to_nlattr))
98 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 99
df6fb868 100 nla_nest_end(skb, nest_parms);
c1d10adb 101
1cde6436
PNA		 102 return ret;
103
df6fb868 104nla_put_failure:
1cde6436
PNA		 105 return -1;
106}
107
bb5cf80e 108static int
1cde6436
PNA		 109ctnetlink_dump_tuples(struct sk_buff *skb,
110 const struct nf_conntrack_tuple *tuple)
111{
112 int ret;
113 struct nf_conntrack_l3proto *l3proto;
605dcad6 114 struct nf_conntrack_l4proto *l4proto;
1cde6436 115
3b988ece 116 rcu_read_lock();
528a3a6f 117 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 118 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 119
3b988ece
HS		 120 if (ret >= 0) {
121 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
122 tuple->dst.protonum);
123 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
124 }
125 rcu_read_unlock();
c1d10adb 126 return ret;
c1d10adb
PNA		 127}
128
129static inline int
130ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
131{
cc1eb431
DM		 132 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
133 goto nla_put_failure;
c1d10adb
PNA		 134 return 0;
135
df6fb868 136nla_put_failure:
c1d10adb
PNA		 137 return -1;
138}
139
140static inline int
141ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
142{
c1216382 143 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
c1d10adb 144
77236b6e 145 if (timeout < 0)
c1d10adb 146 timeout = 0;
601e68e1 147
cc1eb431
DM		 148 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
149 goto nla_put_failure;
c1d10adb
PNA		 150 return 0;
151
df6fb868 152nla_put_failure:
c1d10adb
PNA		 153 return -1;
154}
155
156static inline int
440f0d58 157ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 158{
5e8fbe2a 159 struct nf_conntrack_l4proto *l4proto;
df6fb868 160 struct nlattr *nest_proto;
c1d10adb
PNA		 161 int ret;
162
528a3a6f
PNA		 163 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
164 if (!l4proto->to_nlattr)
c1d10adb 165 return 0;
601e68e1 166
df6fb868
PM		 167 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
168 if (!nest_proto)
169 goto nla_put_failure;
c1d10adb 170
fdf70832 171 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 172
df6fb868 173 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 174
175 return ret;
176
df6fb868 177nla_put_failure:
c1d10adb
PNA		 178 return -1;
179}
180
181static inline int
182ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
183{
df6fb868 184 struct nlattr *nest_helper;
dc808fe2 185 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 186 struct nf_conntrack_helper *helper;
c1d10adb 187
3c158f7f 188 if (!help)
c1d10adb 189 return 0;
601e68e1 190
3c158f7f
PM		 191 helper = rcu_dereference(help->helper);
192 if (!helper)
193 goto out;
194
df6fb868
PM		 195 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
196 if (!nest_helper)
197 goto nla_put_failure;
cc1eb431
DM		 198 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
199 goto nla_put_failure;
c1d10adb 200
fdf70832
PM		 201 if (helper->to_nlattr)
202 helper->to_nlattr(skb, ct);
c1d10adb 203
df6fb868 204 nla_nest_end(skb, nest_helper);
3c158f7f 205out:
c1d10adb
PNA		 206 return 0;
207
df6fb868 208nla_put_failure:
c1d10adb
PNA		 209 return -1;
210}
211
bb5cf80e 212static int
80e60e67
PNA		 213dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes,
214 enum ip_conntrack_dir dir)
c1d10adb
PNA		 215{
216 enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
df6fb868 217 struct nlattr *nest_count;
c1d10adb 218
df6fb868
PM		 219 nest_count = nla_nest_start(skb, type | NLA_F_NESTED);
220 if (!nest_count)
221 goto nla_put_failure;
222
cc1eb431
DM		 223 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) ||
224 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes)))
225 goto nla_put_failure;
c1d10adb 226
df6fb868 227 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 228
229 return 0;
230
df6fb868 231nla_put_failure:
c1d10adb
PNA		 232 return -1;
233}
c1d10adb 234
80e60e67
PNA		 235static int
236ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
237 enum ip_conntrack_dir dir, int type)
238{
239 struct nf_conn_counter *acct;
240 u64 pkts, bytes;
241
242 acct = nf_conn_acct_find(ct);
243 if (!acct)
244 return 0;
245
246 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
247 pkts = atomic64_xchg(&acct[dir].packets, 0);
248 bytes = atomic64_xchg(&acct[dir].bytes, 0);
249 } else {
250 pkts = atomic64_read(&acct[dir].packets);
251 bytes = atomic64_read(&acct[dir].bytes);
252 }
253 return dump_counters(skb, pkts, bytes, dir);
254}
255
a992ca2a
PNA		 256static int
257ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
258{
259 struct nlattr *nest_count;
260 const struct nf_conn_tstamp *tstamp;
261
262 tstamp = nf_conn_tstamp_find(ct);
263 if (!tstamp)
264 return 0;
265
266 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
267 if (!nest_count)
268 goto nla_put_failure;
269
cc1eb431
DM		 270 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) ||
271 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
272 cpu_to_be64(tstamp->stop))))
273 goto nla_put_failure;
a992ca2a
PNA		 274 nla_nest_end(skb, nest_count);
275
276 return 0;
277
278nla_put_failure:
279 return -1;
280}
281
c1d10adb
PNA		 282#ifdef CONFIG_NF_CONNTRACK_MARK
283static inline int
284ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
285{
cc1eb431
DM		 286 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
287 goto nla_put_failure;
c1d10adb
PNA		 288 return 0;
289
df6fb868 290nla_put_failure:
c1d10adb
PNA		 291 return -1;
292}
293#else
294#define ctnetlink_dump_mark(a, b) (0)
295#endif
296
37fccd85
PNA		 297#ifdef CONFIG_NF_CONNTRACK_SECMARK
298static inline int
1cc63249 299ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 300{
1cc63249
EP		 301 struct nlattr *nest_secctx;
302 int len, ret;
303 char *secctx;
304
305 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
306 if (ret)
cba85b53 307 return 0;
1cc63249
EP		 308
309 ret = -1;
310 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
311 if (!nest_secctx)
312 goto nla_put_failure;
37fccd85 313
cc1eb431
DM		 314 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
315 goto nla_put_failure;
1cc63249
EP		 316 nla_nest_end(skb, nest_secctx);
317
318 ret = 0;
37fccd85 319nla_put_failure:
1cc63249
EP		 320 security_release_secctx(secctx, len);
321 return ret;
37fccd85
PNA		 322}
323#else
1cc63249 324#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 325#endif
326
0ceabd83
FW		 327#ifdef CONFIG_NF_CONNTRACK_LABELS
328static int ctnetlink_label_size(const struct nf_conn *ct)
329{
330 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
331
332 if (!labels)
333 return 0;
334 return nla_total_size(labels->words * sizeof(long));
335}
336
337static int
338ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
339{
340 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
341 unsigned int len, i;
342
343 if (!labels)
344 return 0;
345
346 len = labels->words * sizeof(long);
347 i = 0;
348 do {
349 if (labels->bits[i] != 0)
350 return nla_put(skb, CTA_LABELS, len, labels->bits);
351 i++;
352 } while (i < labels->words);
353
354 return 0;
355}
356#else
357#define ctnetlink_dump_labels(a, b) (0)
358#define ctnetlink_label_size(a) (0)
359#endif
360
0f417ce9
PNA		 361#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
362
363static inline int
364ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
365{
366 struct nlattr *nest_parms;
367
368 if (!(ct->status & IPS_EXPECTED))
369 return 0;
370
371 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
372 if (!nest_parms)
373 goto nla_put_failure;
374 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
375 goto nla_put_failure;
376 nla_nest_end(skb, nest_parms);
377
378 return 0;
379
380nla_put_failure:
381 return -1;
382}
383
13eae15a 384#ifdef CONFIG_NF_NAT_NEEDED
bb5cf80e 385static int
13eae15a
PNA		 386dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type)
387{
13eae15a
PNA		 388 struct nlattr *nest_parms;
389
390 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
391 if (!nest_parms)
392 goto nla_put_failure;
393
cc1eb431
DM		 394 if (nla_put_be32(skb, CTA_NAT_SEQ_CORRECTION_POS,
395 htonl(natseq->correction_pos)) ||
396 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_BEFORE,
397 htonl(natseq->offset_before)) ||
398 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_AFTER,
399 htonl(natseq->offset_after)))
400 goto nla_put_failure;
13eae15a
PNA		 401
402 nla_nest_end(skb, nest_parms);
403
404 return 0;
405
406nla_put_failure:
407 return -1;
408}
409
410static inline int
411ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
412{
413 struct nf_nat_seq *natseq;
414 struct nf_conn_nat *nat = nfct_nat(ct);
415
416 if (!(ct->status & IPS_SEQ_ADJUST) || !nat)
417 return 0;
418
419 natseq = &nat->seq[IP_CT_DIR_ORIGINAL];
420 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1)
421 return -1;
422
423 natseq = &nat->seq[IP_CT_DIR_REPLY];
424 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1)
425 return -1;
426
427 return 0;
428}
429#else
430#define ctnetlink_dump_nat_seq_adj(a, b) (0)
431#endif
432
c1d10adb
PNA		 433static inline int
434ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
435{
cc1eb431
DM		 436 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
437 goto nla_put_failure;
c1d10adb
PNA		 438 return 0;
439
df6fb868 440nla_put_failure:
c1d10adb
PNA		 441 return -1;
442}
443
444static inline int
445ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
446{
cc1eb431
DM		 447 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
448 goto nla_put_failure;
c1d10adb
PNA		 449 return 0;
450
df6fb868 451nla_put_failure:
c1d10adb
PNA		 452 return -1;
453}
454
c1d10adb 455static int
15e47304 456ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
80e60e67 457 struct nf_conn *ct)
c1d10adb
PNA		 458{
459 struct nlmsghdr *nlh;
460 struct nfgenmsg *nfmsg;
df6fb868 461 struct nlattr *nest_parms;
15e47304 462 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c1d10adb 463
80e60e67 464 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
15e47304 465 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 466 if (nlh == NULL)
467 goto nlmsg_failure;
c1d10adb 468
96bcf938 469 nfmsg = nlmsg_data(nlh);
5e8fbe2a 470 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 471 nfmsg->version = NFNETLINK_V0;
472 nfmsg->res_id = 0;
473
df6fb868
PM		 474 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
475 if (!nest_parms)
476 goto nla_put_failure;
f2f3e38c 477 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 478 goto nla_put_failure;
479 nla_nest_end(skb, nest_parms);
601e68e1 480
df6fb868
PM		 481 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
482 if (!nest_parms)
483 goto nla_put_failure;
f2f3e38c 484 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 485 goto nla_put_failure;
486 nla_nest_end(skb, nest_parms);
c1d10adb 487
cc1eb431
DM		 488 if (nf_ct_zone(ct) &&
489 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
490 goto nla_put_failure;
ef00f89f 491
c1d10adb
PNA		 492 if (ctnetlink_dump_status(skb, ct) < 0 ||
493 ctnetlink_dump_timeout(skb, ct) < 0 ||
80e60e67
PNA		 494 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 ||
495 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 496 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 497 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
498 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
499 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 500 ctnetlink_dump_secctx(skb, ct) < 0 ||
0ceabd83 501 ctnetlink_dump_labels(skb, ct) < 0 ||
c1d10adb 502 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 503 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 504 ctnetlink_dump_master(skb, ct) < 0 ||
13eae15a 505 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
df6fb868 506 goto nla_put_failure;
c1d10adb 507
96bcf938 508 nlmsg_end(skb, nlh);
c1d10adb
PNA		 509 return skb->len;
510
511nlmsg_failure:
df6fb868 512nla_put_failure:
96bcf938 513 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 514 return -1;
515}
516
03b64f51
PNA		 517static inline size_t
518ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4
HE		 519{
520 struct nf_conntrack_l3proto *l3proto;
521 struct nf_conntrack_l4proto *l4proto;
03b64f51
PNA		 522 size_t len = 0;
523
524 rcu_read_lock();
525 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
526 len += l3proto->nla_size;
527
528 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
529 len += l4proto->nla_size;
530 rcu_read_unlock();
531
532 return len;
533}
534
d26e6a02
JP		 535static inline size_t
536ctnetlink_counters_size(const struct nf_conn *ct)
537{
538 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
539 return 0;
540 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
541 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
542 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
543 ;
544}
545
cba85b53
PNA		 546static inline int
547ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 548{
cba85b53
PNA		 549#ifdef CONFIG_NF_CONNTRACK_SECMARK
550 int len, ret;
1cc63249 551
cba85b53
PNA		 552 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
553 if (ret)
554 return 0;
1cc63249 555
cba85b53
PNA		 556 return nla_total_size(0) /* CTA_SECCTX */
557 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
558#else
559 return 0;
1cc63249 560#endif
cba85b53 561}
1cc63249 562
a992ca2a
PNA		 563static inline size_t
564ctnetlink_timestamp_size(const struct nf_conn *ct)
565{
566#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
567 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
568 return 0;
569 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
570#else
571 return 0;
572#endif
573}
574
03b64f51
PNA		 575static inline size_t
576ctnetlink_nlmsg_size(const struct nf_conn *ct)
577{
578 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
579 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
580 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
581 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
582 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
583 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
584 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
d26e6a02 585 + ctnetlink_counters_size(ct)
a992ca2a 586 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 587 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
588 + nla_total_size(0) /* CTA_PROTOINFO */
589 + nla_total_size(0) /* CTA_HELP */
590 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 591 + ctnetlink_secctx_size(ct)
d271e8bd 592#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 593 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
594 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 595#endif
596#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 597 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
d271e8bd 598#endif
03b64f51 599 + ctnetlink_proto_size(ct)
0ceabd83 600 + ctnetlink_label_size(ct)
03b64f51 601 ;
2732c4e4
HE		 602}
603
8e36c4b5 604#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 605static int
606ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 607{
9592a5c0 608 struct net *net;
c1d10adb
PNA		 609 struct nlmsghdr *nlh;
610 struct nfgenmsg *nfmsg;
df6fb868 611 struct nlattr *nest_parms;
19abb7b0 612 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 613 struct sk_buff *skb;
614 unsigned int type;
c1d10adb 615 unsigned int flags = 0, group;
dd7669a9 616 int err;
c1d10adb
PNA		 617
618 /* ignore our fake conntrack entry */
5bfddbd4 619 if (nf_ct_is_untracked(ct))
e34d5c1a 620 return 0;
c1d10adb 621
a0891aa6 622 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 623 type = IPCTNL_MSG_CT_DELETE;
624 group = NFNLGRP_CONNTRACK_DESTROY;
a0891aa6 625 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 626 type = IPCTNL_MSG_CT_NEW;
627 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 628 group = NFNLGRP_CONNTRACK_NEW;
17e6e4ea 629 } else if (events) {
c1d10adb
PNA		 630 type = IPCTNL_MSG_CT_NEW;
631 group = NFNLGRP_CONNTRACK_UPDATE;
632 } else
e34d5c1a 633 return 0;
a2427692 634
9592a5c0
AD		 635 net = nf_ct_net(ct);
636 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 637 return 0;
a2427692 638
03b64f51
PNA		 639 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
640 if (skb == NULL)
150ace0d 641 goto errout;
c1d10adb 642
c1d10adb 643 type |= NFNL_SUBSYS_CTNETLINK << 8;
15e47304 644 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 645 if (nlh == NULL)
646 goto nlmsg_failure;
c1d10adb 647
96bcf938 648 nfmsg = nlmsg_data(nlh);
5e8fbe2a 649 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 650 nfmsg->version = NFNETLINK_V0;
651 nfmsg->res_id = 0;
652
528a3a6f 653 rcu_read_lock();
df6fb868
PM		 654 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
655 if (!nest_parms)
656 goto nla_put_failure;
f2f3e38c 657 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 658 goto nla_put_failure;
659 nla_nest_end(skb, nest_parms);
601e68e1 660
df6fb868
PM		 661 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
662 if (!nest_parms)
663 goto nla_put_failure;
f2f3e38c 664 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 665 goto nla_put_failure;
666 nla_nest_end(skb, nest_parms);
c1d10adb 667
cc1eb431
DM		 668 if (nf_ct_zone(ct) &&
669 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
670 goto nla_put_failure;
ef00f89f 671
1eedf699
EL		 672 if (ctnetlink_dump_id(skb, ct) < 0)
673 goto nla_put_failure;
674
e57dce60
FH		 675 if (ctnetlink_dump_status(skb, ct) < 0)
676 goto nla_put_failure;
677
a0891aa6 678 if (events & (1 << IPCT_DESTROY)) {
80e60e67
PNA		 679 if (ctnetlink_dump_counters(skb, ct,
680 IP_CT_DIR_ORIGINAL, type) < 0 ||
681 ctnetlink_dump_counters(skb, ct,
682 IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 683 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 684 goto nla_put_failure;
7b621c1e 685 } else {
7b621c1e 686 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 687 goto nla_put_failure;
7b621c1e 688
a0891aa6 689 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 690 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 691 goto nla_put_failure;
7b621c1e 692
a0891aa6 693 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 694 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 695 goto nla_put_failure;
7b621c1e 696
ff660c80 697#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 698 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 699 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 700 goto nla_put_failure;
ff660c80 701#endif
0ceabd83
FW		 702 if (events & (1 << IPCT_LABEL) &&
703 ctnetlink_dump_labels(skb, ct) < 0)
704 goto nla_put_failure;
7b621c1e 705
a0891aa6 706 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 707 ctnetlink_dump_master(skb, ct) < 0)
708 goto nla_put_failure;
709
a0891aa6 710 if (events & (1 << IPCT_NATSEQADJ) &&
13eae15a
PNA		 711 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
712 goto nla_put_failure;
7b621c1e 713 }
b9a37e0c 714
a83099a6 715#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 716 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 717 && ctnetlink_dump_mark(skb, ct) < 0)
718 goto nla_put_failure;
719#endif
528a3a6f 720 rcu_read_unlock();
a83099a6 721
96bcf938 722 nlmsg_end(skb, nlh);
15e47304 723 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 724 GFP_ATOMIC);
dd7669a9
PNA		 725 if (err == -ENOBUFS || err == -EAGAIN)
726 return -ENOBUFS;
727
e34d5c1a 728 return 0;
c1d10adb 729
df6fb868 730nla_put_failure:
528a3a6f 731 rcu_read_unlock();
96bcf938 732 nlmsg_cancel(skb, nlh);
528a3a6f 733nlmsg_failure:
c1d10adb 734 kfree_skb(skb);
150ace0d 735errout:
37b7ef72
PNA		 736 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
737 return -ENOBUFS;
738
e34d5c1a 739 return 0;
c1d10adb
PNA		 740}
741#endif /* CONFIG_NF_CONNTRACK_EVENTS */
742
743static int ctnetlink_done(struct netlink_callback *cb)
744{
89f2e218
PM		 745 if (cb->args[1])
746 nf_ct_put((struct nf_conn *)cb->args[1]);
0f298a28
PNA		 747 if (cb->data)
748 kfree(cb->data);
c1d10adb
PNA		 749 return 0;
750}
751
0f298a28
PNA		 752struct ctnetlink_dump_filter {
753 struct {
754 u_int32_t val;
755 u_int32_t mask;
756 } mark;
757};
758
c1d10adb
PNA		 759static int
760ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
761{
9592a5c0 762 struct net *net = sock_net(skb->sk);
89f2e218 763 struct nf_conn *ct, *last;
c1d10adb 764 struct nf_conntrack_tuple_hash *h;
ea781f19 765 struct hlist_nulls_node *n;
96bcf938 766 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 767 u_int8_t l3proto = nfmsg->nfgen_family;
3b988ece 768 int res;
0f298a28
PNA		 769#ifdef CONFIG_NF_CONNTRACK_MARK
770 const struct ctnetlink_dump_filter *filter = cb->data;
771#endif
3b988ece 772
13ee6ac5 773 spin_lock_bh(&nf_conntrack_lock);
d205dc40 774 last = (struct nf_conn *)cb->args[1];
9ab99d5a 775 for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) {
89f2e218 776restart:
13ee6ac5 777 hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]],
ea781f19 778 hnnode) {
5b1158e9 779 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 780 continue;
781 ct = nf_ct_tuplehash_to_ctrack(h);
87711cb8
PNA		 782 /* Dump entries of a given L3 protocol number.
783 * If it is not specified, ie. l3proto == 0,
784 * then dump everything. */
5e8fbe2a 785 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 786 continue;
d205dc40
PM		 787 if (cb->args[1]) {
788 if (ct != last)
13ee6ac5 789 continue;
d205dc40 790 cb->args[1] = 0;
89f2e218 791 }
0f298a28
PNA		 792#ifdef CONFIG_NF_CONNTRACK_MARK
793 if (filter && !((ct->mark & filter->mark.mask) ==
794 filter->mark.val)) {
795 continue;
796 }
797#endif
3b988ece
HS		 798 rcu_read_lock();
799 res =
15e47304 800 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 801 cb->nlh->nlmsg_seq,
802 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
803 ct);
804 rcu_read_unlock();
805 if (res < 0) {
c71caf41 806 nf_conntrack_get(&ct->ct_general);
89f2e218 807 cb->args[1] = (unsigned long)ct;
c1d10adb 808 goto out;
89f2e218
PM		 809 }
810 }
d205dc40 811 if (cb->args[1]) {
89f2e218
PM		 812 cb->args[1] = 0;
813 goto restart;
c1d10adb
PNA		 814 }
815 }
89f2e218 816out:
13ee6ac5 817 spin_unlock_bh(&nf_conntrack_lock);
d205dc40
PM		 818 if (last)
819 nf_ct_put(last);
c1d10adb 820
c1d10adb
PNA		 821 return skb->len;
822}
823
c1d10adb 824static inline int
df6fb868 825ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
c1d10adb 826{
df6fb868 827 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 828 struct nf_conntrack_l3proto *l3proto;
829 int ret = 0;
830
130ffbc2
DB		 831 ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
832 if (ret < 0)
833 return ret;
c1d10adb 834
cd91566e
FW		 835 rcu_read_lock();
836 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 837
f73e924c
PM		 838 if (likely(l3proto->nlattr_to_tuple)) {
839 ret = nla_validate_nested(attr, CTA_IP_MAX,
840 l3proto->nla_policy);
841 if (ret == 0)
842 ret = l3proto->nlattr_to_tuple(tb, tuple);
843 }
c1d10adb 844
cd91566e 845 rcu_read_unlock();
c1d10adb 846
c1d10adb
PNA		 847 return ret;
848}
849
f73e924c
PM		 850static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
851 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 852};
853
854static inline int
df6fb868 855ctnetlink_parse_tuple_proto(struct nlattr *attr,
c1d10adb
PNA		 856 struct nf_conntrack_tuple *tuple)
857{
df6fb868 858 struct nlattr *tb[CTA_PROTO_MAX+1];
605dcad6 859 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 860 int ret = 0;
861
f73e924c
PM		 862 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
863 if (ret < 0)
864 return ret;
c1d10adb 865
df6fb868 866 if (!tb[CTA_PROTO_NUM])
c1d10adb 867 return -EINVAL;
77236b6e 868 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 869
cd91566e
FW		 870 rcu_read_lock();
871 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 872
f73e924c
PM		 873 if (likely(l4proto->nlattr_to_tuple)) {
874 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
875 l4proto->nla_policy);
876 if (ret == 0)
877 ret = l4proto->nlattr_to_tuple(tb, tuple);
878 }
c1d10adb 879
cd91566e 880 rcu_read_unlock();
601e68e1 881
c1d10adb
PNA		 882 return ret;
883}
884
d0b0268f
PM		 885static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
886 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
887 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
888};
889
bb5cf80e 890static int
39938324
PM		 891ctnetlink_parse_tuple(const struct nlattr * const cda[],
892 struct nf_conntrack_tuple *tuple,
a00f1f36 893 enum ctattr_type type, u_int8_t l3num)
c1d10adb 894{
df6fb868 895 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 896 int err;
897
c1d10adb
PNA		 898 memset(tuple, 0, sizeof(*tuple));
899
130ffbc2
DB		 900 err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
901 if (err < 0)
902 return err;
c1d10adb 903
df6fb868 904 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 905 return -EINVAL;
906
907 tuple->src.l3num = l3num;
908
df6fb868 909 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 910 if (err < 0)
911 return err;
912
df6fb868 913 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 914 return -EINVAL;
915
df6fb868 916 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 917 if (err < 0)
918 return err;
919
920 /* orig and expect tuples get DIR_ORIGINAL */
921 if (type == CTA_TUPLE_REPLY)
922 tuple->dst.dir = IP_CT_DIR_REPLY;
923 else
924 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
925
c1d10adb
PNA		 926 return 0;
927}
928
ef00f89f
PM		 929static int
930ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone)
931{
932 if (attr)
933#ifdef CONFIG_NF_CONNTRACK_ZONES
934 *zone = ntohs(nla_get_be16(attr));
935#else
936 return -EOPNOTSUPP;
937#endif
938 else
939 *zone = 0;
940
941 return 0;
942}
943
d0b0268f 944static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 945 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
946 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 947};
948
c1d10adb 949static inline int
ae243bee
PNA		 950ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
951 struct nlattr **helpinfo)
c1d10adb 952{
130ffbc2 953 int err;
df6fb868 954 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 955
130ffbc2
DB		 956 err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
957 if (err < 0)
958 return err;
c1d10adb 959
df6fb868 960 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 961 return -EINVAL;
962
df6fb868 963 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 964
ae243bee
PNA		 965 if (tb[CTA_HELP_INFO])
966 *helpinfo = tb[CTA_HELP_INFO];
967
c1d10adb
PNA		 968 return 0;
969}
970
9b21f6a9 971#define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE)
f73e924c 972static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 973 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
974 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 975 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 976 [CTA_PROTOINFO] = { .type = NLA_NESTED },
977 [CTA_HELP] = { .type = NLA_NESTED },
978 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 979 [CTA_TIMEOUT] = { .type = NLA_U32 },
980 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 981 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 982 [CTA_NAT_DST] = { .type = NLA_NESTED },
983 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 984 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
985 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 986 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 987 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9
FW		 988 [CTA_LABELS] = { .type = NLA_BINARY,
989 .len = __CTA_LABELS_MAX_LENGTH },
990 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
991 .len = __CTA_LABELS_MAX_LENGTH },
c1d10adb
PNA		 992};
993
994static int
601e68e1 995ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 996 const struct nlmsghdr *nlh,
997 const struct nlattr * const cda[])
c1d10adb 998{
9592a5c0 999 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1000 struct nf_conntrack_tuple_hash *h;
1001 struct nf_conntrack_tuple tuple;
1002 struct nf_conn *ct;
96bcf938 1003 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1004 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1005 u16 zone;
1006 int err;
1007
1008 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1009 if (err < 0)
1010 return err;
c1d10adb 1011
df6fb868 1012 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1013 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1014 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1015 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1016 else {
1017 /* Flush the whole table */
9592a5c0 1018 nf_conntrack_flush_report(net,
15e47304 1019 NETLINK_CB(skb).portid,
274d383b 1020 nlmsg_report(nlh));
c1d10adb
PNA		 1021 return 0;
1022 }
1023
1024 if (err < 0)
1025 return err;
1026
ef00f89f 1027 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1028 if (!h)
c1d10adb 1029 return -ENOENT;
c1d10adb
PNA		 1030
1031 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1032
df6fb868 1033 if (cda[CTA_ID]) {
77236b6e 1034 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 1035 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 1036 nf_ct_put(ct);
1037 return -ENOENT;
1038 }
601e68e1 1039 }
c1d10adb 1040
a16a1647
PNA		 1041 if (del_timer(&ct->timeout)) {
1042 if (nf_conntrack_event_report(IPCT_DESTROY, ct,
15e47304 1043 NETLINK_CB(skb).portid,
a16a1647
PNA		 1044 nlmsg_report(nlh)) < 0) {
1045 nf_ct_delete_from_lists(ct);
1046 /* we failed to report the event, try later */
04dac011 1047 nf_ct_dying_timeout(ct);
a16a1647
PNA		 1048 nf_ct_put(ct);
1049 return 0;
1050 }
1051 /* death_by_timeout would report the event again */
1052 set_bit(IPS_DYING_BIT, &ct->status);
dd7669a9 1053 nf_ct_delete_from_lists(ct);
dd7669a9 1054 nf_ct_put(ct);
dd7669a9 1055 }
c1d10adb 1056 nf_ct_put(ct);
c1d10adb
PNA		 1057
1058 return 0;
1059}
1060
1061static int
601e68e1 1062ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1063 const struct nlmsghdr *nlh,
1064 const struct nlattr * const cda[])
c1d10adb 1065{
9592a5c0 1066 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1067 struct nf_conntrack_tuple_hash *h;
1068 struct nf_conntrack_tuple tuple;
1069 struct nf_conn *ct;
1070 struct sk_buff *skb2 = NULL;
96bcf938 1071 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1072 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1073 u16 zone;
1074 int err;
c1d10adb 1075
80d326fa
PNA		 1076 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1077 struct netlink_dump_control c = {
1078 .dump = ctnetlink_dump_table,
1079 .done = ctnetlink_done,
1080 };
0f298a28
PNA		 1081#ifdef CONFIG_NF_CONNTRACK_MARK
1082 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1083 struct ctnetlink_dump_filter *filter;
1084
1085 filter = kzalloc(sizeof(struct ctnetlink_dump_filter),
1086 GFP_ATOMIC);
1087 if (filter == NULL)
1088 return -ENOMEM;
1089
1090 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
1091 filter->mark.mask =
1092 ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
1093 c.data = filter;
1094 }
1095#endif
80d326fa
PNA		 1096 return netlink_dump_start(ctnl, skb, nlh, &c);
1097 }
c1d10adb 1098
ef00f89f
PM		 1099 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1100 if (err < 0)
1101 return err;
1102
df6fb868 1103 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1104 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1105 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1106 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1107 else
1108 return -EINVAL;
1109
1110 if (err < 0)
1111 return err;
1112
ef00f89f 1113 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1114 if (!h)
c1d10adb 1115 return -ENOENT;
9ea8cfd6 1116
c1d10adb
PNA		 1117 ct = nf_ct_tuplehash_to_ctrack(h);
1118
1119 err = -ENOMEM;
96bcf938
PNA		 1120 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1121 if (skb2 == NULL) {
c1d10adb
PNA		 1122 nf_ct_put(ct);
1123 return -ENOMEM;
1124 }
c1d10adb 1125
528a3a6f 1126 rcu_read_lock();
15e47304 1127 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
80e60e67 1128 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1129 rcu_read_unlock();
c1d10adb
PNA		 1130 nf_ct_put(ct);
1131 if (err <= 0)
1132 goto free;
1133
15e47304 1134 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
c1d10adb
PNA		 1135 if (err < 0)
1136 goto out;
1137
c1d10adb
PNA		 1138 return 0;
1139
1140free:
1141 kfree_skb(skb2);
1142out:
f31e8d49
PNA		 1143 /* this avoids a loop in nfnetlink. */
1144 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1145}
1146
d871befe
PNA		 1147static int ctnetlink_done_list(struct netlink_callback *cb)
1148{
1149 if (cb->args[1])
1150 nf_ct_put((struct nf_conn *)cb->args[1]);
1151 return 0;
1152}
1153
1154static int
1155ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb,
1156 struct hlist_nulls_head *list)
1157{
1158 struct nf_conn *ct, *last;
1159 struct nf_conntrack_tuple_hash *h;
1160 struct hlist_nulls_node *n;
1161 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1162 u_int8_t l3proto = nfmsg->nfgen_family;
1163 int res;
1164
1165 if (cb->args[2])
1166 return 0;
1167
1168 spin_lock_bh(&nf_conntrack_lock);
1169 last = (struct nf_conn *)cb->args[1];
1170restart:
1171 hlist_nulls_for_each_entry(h, n, list, hnnode) {
1172 ct = nf_ct_tuplehash_to_ctrack(h);
1173 if (l3proto && nf_ct_l3num(ct) != l3proto)
1174 continue;
1175 if (cb->args[1]) {
1176 if (ct != last)
1177 continue;
1178 cb->args[1] = 0;
1179 }
1180 rcu_read_lock();
1181 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1182 cb->nlh->nlmsg_seq,
1183 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1184 ct);
1185 rcu_read_unlock();
1186 if (res < 0) {
1187 nf_conntrack_get(&ct->ct_general);
1188 cb->args[1] = (unsigned long)ct;
1189 goto out;
1190 }
1191 }
1192 if (cb->args[1]) {
1193 cb->args[1] = 0;
1194 goto restart;
1195 } else
1196 cb->args[2] = 1;
1197out:
1198 spin_unlock_bh(&nf_conntrack_lock);
1199 if (last)
1200 nf_ct_put(last);
1201
1202 return skb->len;
1203}
1204
1205static int
1206ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1207{
1208 struct net *net = sock_net(skb->sk);
1209
1210 return ctnetlink_dump_list(skb, cb, &net->ct.dying);
1211}
1212
1213static int
1214ctnetlink_get_ct_dying(struct sock *ctnl, struct sk_buff *skb,
1215 const struct nlmsghdr *nlh,
1216 const struct nlattr * const cda[])
1217{
1218 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1219 struct netlink_dump_control c = {
1220 .dump = ctnetlink_dump_dying,
1221 .done = ctnetlink_done_list,
1222 };
1223 return netlink_dump_start(ctnl, skb, nlh, &c);
1224 }
1225
1226 return -EOPNOTSUPP;
1227}
1228
1229static int
1230ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1231{
1232 struct net *net = sock_net(skb->sk);
1233
1234 return ctnetlink_dump_list(skb, cb, &net->ct.unconfirmed);
1235}
1236
1237static int
1238ctnetlink_get_ct_unconfirmed(struct sock *ctnl, struct sk_buff *skb,
1239 const struct nlmsghdr *nlh,
1240 const struct nlattr * const cda[])
1241{
1242 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1243 struct netlink_dump_control c = {
1244 .dump = ctnetlink_dump_unconfirmed,
1245 .done = ctnetlink_done_list,
1246 };
1247 return netlink_dump_start(ctnl, skb, nlh, &c);
1248 }
1249
1250 return -EOPNOTSUPP;
1251}
1252
67671841 1253#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1254static int
1255ctnetlink_parse_nat_setup(struct nf_conn *ct,
1256 enum nf_nat_manip_type manip,
39938324 1257 const struct nlattr *attr)
e6a7d3c0
PNA		 1258{
1259 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
c7232c99 1260 int err;
e6a7d3c0
PNA		 1261
1262 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1263 if (!parse_nat_setup) {
95a5afca 1264#ifdef CONFIG_MODULES
e6a7d3c0 1265 rcu_read_unlock();
c14b78e7 1266 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1267 if (request_module("nf-nat") < 0) {
c14b78e7 1268 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1269 rcu_read_lock();
1270 return -EOPNOTSUPP;
1271 }
c14b78e7 1272 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1273 rcu_read_lock();
1274 if (nfnetlink_parse_nat_setup_hook)
1275 return -EAGAIN;
1276#endif
1277 return -EOPNOTSUPP;
1278 }
1279
c7232c99
PM		 1280 err = parse_nat_setup(ct, manip, attr);
1281 if (err == -EAGAIN) {
1282#ifdef CONFIG_MODULES
1283 rcu_read_unlock();
c14b78e7 1284 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1285 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1286 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1287 rcu_read_lock();
1288 return -EOPNOTSUPP;
1289 }
c14b78e7 1290 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1291 rcu_read_lock();
1292#else
1293 err = -EOPNOTSUPP;
1294#endif
1295 }
1296 return err;
e6a7d3c0 1297}
67671841 1298#endif
e6a7d3c0 1299
bb5cf80e 1300static int
39938324 1301ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1302{
1303 unsigned long d;
77236b6e 1304 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1305 d = ct->status ^ status;
1306
1307 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1308 /* unchangeable */
0adf9d67 1309 return -EBUSY;
601e68e1 1310
c1d10adb
PNA		 1311 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1312 /* SEEN_REPLY bit can only be set */
0adf9d67 1313 return -EBUSY;
601e68e1 1314
c1d10adb
PNA		 1315 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1316 /* ASSURED bit can only be set */
0adf9d67 1317 return -EBUSY;
c1d10adb 1318
c1d10adb
PNA		 1319 /* Be careful here, modifying NAT bits can screw up things,
1320 * so don't let users modify them directly if they don't pass
5b1158e9 1321 * nf_nat_range. */
c1d10adb
PNA		 1322 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1323 return 0;
1324}
1325
e6a7d3c0 1326static int
39938324 1327ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1328{
1329#ifdef CONFIG_NF_NAT_NEEDED
1330 int ret;
1331
1332 if (cda[CTA_NAT_DST]) {
1333 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1334 NF_NAT_MANIP_DST,
e6a7d3c0
PNA		 1335 cda[CTA_NAT_DST]);
1336 if (ret < 0)
1337 return ret;
1338 }
1339 if (cda[CTA_NAT_SRC]) {
1340 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1341 NF_NAT_MANIP_SRC,
e6a7d3c0
PNA		 1342 cda[CTA_NAT_SRC]);
1343 if (ret < 0)
1344 return ret;
1345 }
1346 return 0;
1347#else
1348 return -EOPNOTSUPP;
1349#endif
1350}
c1d10adb
PNA		 1351
1352static inline int
39938324 1353ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1354{
1355 struct nf_conntrack_helper *helper;
dc808fe2 1356 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1357 char *helpname = NULL;
ae243bee 1358 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1359 int err;
1360
c1d10adb
PNA		 1361 /* don't change helper of sibling connections */
1362 if (ct->master)
0adf9d67 1363 return -EBUSY;
c1d10adb 1364
ae243bee 1365 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1366 if (err < 0)
1367 return err;
1368
df293bbb
YK		 1369 if (!strcmp(helpname, "")) {
1370 if (help && help->helper) {
c1d10adb
PNA		 1371 /* we had a helper before ... */
1372 nf_ct_remove_expectations(ct);
a9b3cd7f 1373 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1374 }
df293bbb
YK		 1375
1376 return 0;
c1d10adb 1377 }
601e68e1 1378
794e6871
PM		 1379 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1380 nf_ct_protonum(ct));
226c0c0e
PNA		 1381 if (helper == NULL) {
1382#ifdef CONFIG_MODULES
1383 spin_unlock_bh(&nf_conntrack_lock);
1384
1385 if (request_module("nfct-helper-%s", helpname) < 0) {
1386 spin_lock_bh(&nf_conntrack_lock);
1387 return -EOPNOTSUPP;
1388 }
1389
1390 spin_lock_bh(&nf_conntrack_lock);
794e6871
PM		 1391 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1392 nf_ct_protonum(ct));
226c0c0e
PNA		 1393 if (helper)
1394 return -EAGAIN;
1395#endif
0adf9d67 1396 return -EOPNOTSUPP;
226c0c0e 1397 }
df293bbb 1398
ceceae1b 1399 if (help) {
ae243bee
PNA		 1400 if (help->helper == helper) {
1401 /* update private helper data if allowed. */
7be54ca4 1402 if (helper->from_nlattr)
ae243bee 1403 helper->from_nlattr(helpinfo, ct);
ceceae1b 1404 return 0;
fd7462de 1405 } else
ceceae1b 1406 return -EBUSY;
ceceae1b 1407 }
df293bbb 1408
fd7462de
PNA		 1409 /* we cannot set a helper for an existing conntrack */
1410 return -EOPNOTSUPP;
c1d10adb
PNA		 1411}
1412
1413static inline int
39938324 1414ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1415{
77236b6e 1416 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
601e68e1 1417
c1d10adb
PNA		 1418 if (!del_timer(&ct->timeout))
1419 return -ETIME;
1420
1421 ct->timeout.expires = jiffies + timeout * HZ;
1422 add_timer(&ct->timeout);
1423
1424 return 0;
1425}
1426
d0b0268f
PM		 1427static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1428 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1429 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1430 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1431};
1432
c1d10adb 1433static inline int
39938324 1434ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1435{
39938324
PM		 1436 const struct nlattr *attr = cda[CTA_PROTOINFO];
1437 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
605dcad6 1438 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 1439 int err = 0;
1440
130ffbc2
DB		 1441 err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
1442 if (err < 0)
1443 return err;
c1d10adb 1444
cd91566e
FW		 1445 rcu_read_lock();
1446 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1447 if (l4proto->from_nlattr)
1448 err = l4proto->from_nlattr(tb, ct);
cd91566e 1449 rcu_read_unlock();
c1d10adb
PNA		 1450
1451 return err;
1452}
1453
13eae15a 1454#ifdef CONFIG_NF_NAT_NEEDED
d0b0268f
PM		 1455static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = {
1456 [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 },
1457 [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 },
1458 [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 },
1459};
1460
13eae15a 1461static inline int
39938324 1462change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr)
13eae15a 1463{
130ffbc2 1464 int err;
13eae15a
PNA		 1465 struct nlattr *cda[CTA_NAT_SEQ_MAX+1];
1466
130ffbc2
DB		 1467 err = nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy);
1468 if (err < 0)
1469 return err;
13eae15a
PNA		 1470
1471 if (!cda[CTA_NAT_SEQ_CORRECTION_POS])
1472 return -EINVAL;
1473
1474 natseq->correction_pos =
77236b6e 1475 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS]));
13eae15a
PNA		 1476
1477 if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE])
1478 return -EINVAL;
1479
1480 natseq->offset_before =
77236b6e 1481 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE]));
13eae15a
PNA		 1482
1483 if (!cda[CTA_NAT_SEQ_OFFSET_AFTER])
1484 return -EINVAL;
1485
1486 natseq->offset_after =
77236b6e 1487 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER]));
13eae15a
PNA		 1488
1489 return 0;
1490}
1491
1492static int
39938324
PM		 1493ctnetlink_change_nat_seq_adj(struct nf_conn *ct,
1494 const struct nlattr * const cda[])
13eae15a
PNA		 1495{
1496 int ret = 0;
1497 struct nf_conn_nat *nat = nfct_nat(ct);
1498
1499 if (!nat)
1500 return 0;
1501
1502 if (cda[CTA_NAT_SEQ_ADJ_ORIG]) {
1503 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL],
1504 cda[CTA_NAT_SEQ_ADJ_ORIG]);
1505 if (ret < 0)
1506 return ret;
1507
1508 ct->status |= IPS_SEQ_ADJUST;
1509 }
1510
1511 if (cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1512 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY],
1513 cda[CTA_NAT_SEQ_ADJ_REPLY]);
1514 if (ret < 0)
1515 return ret;
1516
1517 ct->status |= IPS_SEQ_ADJUST;
1518 }
1519
1520 return 0;
1521}
1522#endif
1523
9b21f6a9
FW		 1524static int
1525ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1526{
1527#ifdef CONFIG_NF_CONNTRACK_LABELS
1528 size_t len = nla_len(cda[CTA_LABELS]);
1529 const void *mask = cda[CTA_LABELS_MASK];
1530
1531 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1532 return -EINVAL;
1533
1534 if (mask) {
1535 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1536 nla_len(cda[CTA_LABELS_MASK]) != len)
1537 return -EINVAL;
1538 mask = nla_data(cda[CTA_LABELS_MASK]);
1539 }
1540
1541 len /= sizeof(u32);
1542
1543 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1544#else
1545 return -EOPNOTSUPP;
1546#endif
1547}
1548
c1d10adb 1549static int
39938324
PM		 1550ctnetlink_change_conntrack(struct nf_conn *ct,
1551 const struct nlattr * const cda[])
c1d10adb
PNA		 1552{
1553 int err;
1554
e098360f
PNA		 1555 /* only allow NAT changes and master assignation for new conntracks */
1556 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1557 return -EOPNOTSUPP;
1558
df6fb868 1559 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1560 err = ctnetlink_change_helper(ct, cda);
1561 if (err < 0)
1562 return err;
1563 }
1564
df6fb868 1565 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1566 err = ctnetlink_change_timeout(ct, cda);
1567 if (err < 0)
1568 return err;
1569 }
1570
df6fb868 1571 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1572 err = ctnetlink_change_status(ct, cda);
1573 if (err < 0)
1574 return err;
1575 }
1576
df6fb868 1577 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1578 err = ctnetlink_change_protoinfo(ct, cda);
1579 if (err < 0)
1580 return err;
1581 }
1582
bcd1e830 1583#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1584 if (cda[CTA_MARK])
77236b6e 1585 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1586#endif
1587
13eae15a
PNA		 1588#ifdef CONFIG_NF_NAT_NEEDED
1589 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1590 err = ctnetlink_change_nat_seq_adj(ct, cda);
1591 if (err < 0)
1592 return err;
1593 }
1594#endif
9b21f6a9
FW		 1595 if (cda[CTA_LABELS]) {
1596 err = ctnetlink_attach_labels(ct, cda);
1597 if (err < 0)
1598 return err;
1599 }
13eae15a 1600
c1d10adb
PNA		 1601 return 0;
1602}
1603
f0a3c086 1604static struct nf_conn *
ef00f89f 1605ctnetlink_create_conntrack(struct net *net, u16 zone,
9592a5c0 1606 const struct nlattr * const cda[],
c1d10adb 1607 struct nf_conntrack_tuple *otuple,
5faa1f4c 1608 struct nf_conntrack_tuple *rtuple,
7ec47496 1609 u8 u3)
c1d10adb
PNA		 1610{
1611 struct nf_conn *ct;
1612 int err = -EINVAL;
ceceae1b 1613 struct nf_conntrack_helper *helper;
315c34da 1614 struct nf_conn_tstamp *tstamp;
c1d10adb 1615
ef00f89f 1616 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1617 if (IS_ERR(ct))
f0a3c086 1618 return ERR_PTR(-ENOMEM);
c1d10adb 1619
df6fb868 1620 if (!cda[CTA_TIMEOUT])
0f5b3e85 1621 goto err1;
77236b6e 1622 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
c1d10adb
PNA		 1623
1624 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
c1d10adb 1625
1575e7ea 1626 rcu_read_lock();
226c0c0e 1627 if (cda[CTA_HELP]) {
29fe1b48 1628 char *helpname = NULL;
ae243bee
PNA		 1629 struct nlattr *helpinfo = NULL;
1630
1631 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1632 if (err < 0)
1633 goto err2;
226c0c0e 1634
794e6871
PM		 1635 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1636 nf_ct_protonum(ct));
226c0c0e
PNA		 1637 if (helper == NULL) {
1638 rcu_read_unlock();
1639#ifdef CONFIG_MODULES
1640 if (request_module("nfct-helper-%s", helpname) < 0) {
1641 err = -EOPNOTSUPP;
0f5b3e85 1642 goto err1;
226c0c0e
PNA		 1643 }
1644
1645 rcu_read_lock();
794e6871
PM		 1646 helper = __nf_conntrack_helper_find(helpname,
1647 nf_ct_l3num(ct),
1648 nf_ct_protonum(ct));
226c0c0e 1649 if (helper) {
226c0c0e 1650 err = -EAGAIN;
0f5b3e85 1651 goto err2;
226c0c0e
PNA		 1652 }
1653 rcu_read_unlock();
1654#endif
1655 err = -EOPNOTSUPP;
0f5b3e85 1656 goto err1;
226c0c0e
PNA		 1657 } else {
1658 struct nf_conn_help *help;
1659
1afc5679 1660 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1661 if (help == NULL) {
226c0c0e 1662 err = -ENOMEM;
0f5b3e85 1663 goto err2;
226c0c0e 1664 }
ae243bee 1665 /* set private helper data if allowed. */
7be54ca4 1666 if (helper->from_nlattr)
ae243bee 1667 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1668
1669 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1670 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1671 }
1672 } else {
1673 /* try an implicit helper assignation */
b2a15a60 1674 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1675 if (err < 0)
1676 goto err2;
1575e7ea
PNA		 1677 }
1678
a88e22ad
PNA		 1679 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
1680 err = ctnetlink_change_nat(ct, cda);
0f5b3e85
PM		 1681 if (err < 0)
1682 goto err2;
e6a7d3c0
PNA		 1683 }
1684
a88e22ad 1685 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1686 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 1687 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017
FW		 1688 nf_ct_labels_ext_add(ct);
1689
a88e22ad
PNA		 1690 /* we must add conntrack extensions before confirmation. */
1691 ct->status |= IPS_CONFIRMED;
1692
1693 if (cda[CTA_STATUS]) {
1694 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1695 if (err < 0)
1696 goto err2;
bbb3357d 1697 }
c1d10adb 1698
c969aa7d
PNA		 1699#ifdef CONFIG_NF_NAT_NEEDED
1700 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1701 err = ctnetlink_change_nat_seq_adj(ct, cda);
0f5b3e85
PM		 1702 if (err < 0)
1703 goto err2;
c969aa7d
PNA		 1704 }
1705#endif
1706
e5fc9e7a 1707 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 1708 if (cda[CTA_PROTOINFO]) {
c1d10adb 1709 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 1710 if (err < 0)
1711 goto err2;
c1d10adb
PNA		 1712 }
1713
bcd1e830 1714#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1715 if (cda[CTA_MARK])
77236b6e 1716 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1717#endif
1718
5faa1f4c 1719 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 1720 if (cda[CTA_TUPLE_MASTER]) {
1721 struct nf_conntrack_tuple master;
1722 struct nf_conntrack_tuple_hash *master_h;
1723 struct nf_conn *master_ct;
1724
1725 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
1726 if (err < 0)
0f5b3e85 1727 goto err2;
7ec47496 1728
ef00f89f 1729 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 1730 if (master_h == NULL) {
1731 err = -ENOENT;
0f5b3e85 1732 goto err2;
7ec47496
PNA		 1733 }
1734 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 1735 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 1736 ct->master = master_ct;
f2a89004 1737 }
315c34da
PNA		 1738 tstamp = nf_conn_tstamp_find(ct);
1739 if (tstamp)
1740 tstamp->start = ktime_to_ns(ktime_get_real());
5faa1f4c 1741
7d367e06
JK		 1742 err = nf_conntrack_hash_check_insert(ct);
1743 if (err < 0)
1744 goto err2;
1745
58a3c9bb 1746 rcu_read_unlock();
dafc741c 1747
f0a3c086 1748 return ct;
c1d10adb 1749
0f5b3e85
PM		 1750err2:
1751 rcu_read_unlock();
1752err1:
c1d10adb 1753 nf_conntrack_free(ct);
f0a3c086 1754 return ERR_PTR(err);
c1d10adb
PNA		 1755}
1756
601e68e1
YH		 1757static int
1758ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1759 const struct nlmsghdr *nlh,
1760 const struct nlattr * const cda[])
c1d10adb 1761{
9592a5c0 1762 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1763 struct nf_conntrack_tuple otuple, rtuple;
1764 struct nf_conntrack_tuple_hash *h = NULL;
96bcf938 1765 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
7d367e06 1766 struct nf_conn *ct;
c1d10adb 1767 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1768 u16 zone;
1769 int err;
1770
1771 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1772 if (err < 0)
1773 return err;
c1d10adb 1774
df6fb868 1775 if (cda[CTA_TUPLE_ORIG]) {
c1d10adb
PNA		 1776 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3);
1777 if (err < 0)
1778 return err;
1779 }
1780
df6fb868 1781 if (cda[CTA_TUPLE_REPLY]) {
c1d10adb
PNA		 1782 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3);
1783 if (err < 0)
1784 return err;
1785 }
1786
df6fb868 1787 if (cda[CTA_TUPLE_ORIG])
7d367e06 1788 h = nf_conntrack_find_get(net, zone, &otuple);
df6fb868 1789 else if (cda[CTA_TUPLE_REPLY])
7d367e06 1790 h = nf_conntrack_find_get(net, zone, &rtuple);
c1d10adb
PNA		 1791
1792 if (h == NULL) {
c1d10adb 1793 err = -ENOENT;
f0a3c086 1794 if (nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 1795 enum ip_conntrack_events events;
5faa1f4c 1796
442fad94
FW		 1797 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
1798 return -EINVAL;
1799
ef00f89f 1800 ct = ctnetlink_create_conntrack(net, zone, cda, &otuple,
f0a3c086 1801 &rtuple, u3);
7d367e06
JK		 1802 if (IS_ERR(ct))
1803 return PTR_ERR(ct);
1804
f0a3c086 1805 err = 0;
fecc1133
PNA		 1806 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1807 events = IPCT_RELATED;
1808 else
1809 events = IPCT_NEW;
1810
9b21f6a9
FW		 1811 if (cda[CTA_LABELS] &&
1812 ctnetlink_attach_labels(ct, cda) == 0)
1813 events |= (1 << IPCT_LABEL);
1814
858b3133
PM		 1815 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1816 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1817 (1 << IPCT_HELPER) |
1818 (1 << IPCT_PROTOINFO) |
1819 (1 << IPCT_NATSEQADJ) |
1820 (1 << IPCT_MARK) | events,
15e47304 1821 ct, NETLINK_CB(skb).portid,
a0891aa6 1822 nlmsg_report(nlh));
f0a3c086 1823 nf_ct_put(ct);
7d367e06 1824 }
5faa1f4c 1825
c1d10adb
PNA		 1826 return err;
1827 }
1828 /* implicit 'else' */
1829
c1d10adb 1830 err = -EEXIST;
7d367e06 1831 ct = nf_ct_tuplehash_to_ctrack(h);
ff4ca827 1832 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
7d367e06 1833 spin_lock_bh(&nf_conntrack_lock);
19abb7b0 1834 err = ctnetlink_change_conntrack(ct, cda);
7d367e06 1835 spin_unlock_bh(&nf_conntrack_lock);
19abb7b0 1836 if (err == 0) {
858b3133
PM		 1837 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1838 (1 << IPCT_ASSURED) |
a0891aa6 1839 (1 << IPCT_HELPER) |
797a7d66 1840 (1 << IPCT_LABEL) |
a0891aa6
PNA		 1841 (1 << IPCT_PROTOINFO) |
1842 (1 << IPCT_NATSEQADJ) |
1843 (1 << IPCT_MARK),
15e47304 1844 ct, NETLINK_CB(skb).portid,
a0891aa6 1845 nlmsg_report(nlh));
7d367e06 1846 }
ff4ca827 1847 }
c1d10adb 1848
7d367e06 1849 nf_ct_put(ct);
c1d10adb
PNA		 1850 return err;
1851}
1852
392025f8 1853static int
15e47304 1854ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 1855 __u16 cpu, const struct ip_conntrack_stat *st)
1856{
1857 struct nlmsghdr *nlh;
1858 struct nfgenmsg *nfmsg;
15e47304 1859 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 1860
1861 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU);
15e47304 1862 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 1863 if (nlh == NULL)
1864 goto nlmsg_failure;
1865
1866 nfmsg = nlmsg_data(nlh);
1867 nfmsg->nfgen_family = AF_UNSPEC;
1868 nfmsg->version = NFNETLINK_V0;
1869 nfmsg->res_id = htons(cpu);
1870
1871 if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) ||
1872 nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
1873 nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) ||
1874 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
1875 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
1876 nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) ||
1877 nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) ||
1878 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
1879 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
1880 htonl(st->insert_failed)) ||
1881 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
1882 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
1883 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
1884 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
1885 htonl(st->search_restart)))
1886 goto nla_put_failure;
1887
1888 nlmsg_end(skb, nlh);
1889 return skb->len;
1890
1891nla_put_failure:
1892nlmsg_failure:
1893 nlmsg_cancel(skb, nlh);
1894 return -1;
1895}
1896
1897static int
1898ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
1899{
1900 int cpu;
1901 struct net *net = sock_net(skb->sk);
1902
1903 if (cb->args[0] == nr_cpu_ids)
1904 return 0;
1905
1906 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1907 const struct ip_conntrack_stat *st;
1908
1909 if (!cpu_possible(cpu))
1910 continue;
1911
1912 st = per_cpu_ptr(net->ct.stat, cpu);
1913 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 1914 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 1915 cb->nlh->nlmsg_seq,
1916 cpu, st) < 0)
1917 break;
1918 }
1919 cb->args[0] = cpu;
1920
1921 return skb->len;
1922}
1923
1924static int
1925ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb,
1926 const struct nlmsghdr *nlh,
1927 const struct nlattr * const cda[])
1928{
1929 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1930 struct netlink_dump_control c = {
1931 .dump = ctnetlink_ct_stat_cpu_dump,
1932 };
1933 return netlink_dump_start(ctnl, skb, nlh, &c);
1934 }
1935
1936 return 0;
1937}
1938
1939static int
15e47304 1940ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 1941 struct net *net)
1942{
1943 struct nlmsghdr *nlh;
1944 struct nfgenmsg *nfmsg;
15e47304 1945 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 1946 unsigned int nr_conntracks = atomic_read(&net->ct.count);
1947
1948 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS);
15e47304 1949 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 1950 if (nlh == NULL)
1951 goto nlmsg_failure;
1952
1953 nfmsg = nlmsg_data(nlh);
1954 nfmsg->nfgen_family = AF_UNSPEC;
1955 nfmsg->version = NFNETLINK_V0;
1956 nfmsg->res_id = 0;
1957
1958 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
1959 goto nla_put_failure;
1960
1961 nlmsg_end(skb, nlh);
1962 return skb->len;
1963
1964nla_put_failure:
1965nlmsg_failure:
1966 nlmsg_cancel(skb, nlh);
1967 return -1;
1968}
1969
1970static int
1971ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb,
1972 const struct nlmsghdr *nlh,
1973 const struct nlattr * const cda[])
1974{
1975 struct sk_buff *skb2;
1976 int err;
1977
1978 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1979 if (skb2 == NULL)
1980 return -ENOMEM;
1981
15e47304 1982 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
392025f8
PNA		 1983 nlh->nlmsg_seq,
1984 NFNL_MSG_TYPE(nlh->nlmsg_type),
1985 sock_net(skb->sk));
1986 if (err <= 0)
1987 goto free;
1988
15e47304 1989 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
392025f8
PNA		 1990 if (err < 0)
1991 goto out;
1992
1993 return 0;
1994
1995free:
1996 kfree_skb(skb2);
1997out:
1998 /* this avoids a loop in nfnetlink. */
1999 return err == -EAGAIN ? -ENOBUFS : err;
2000}
2001
7c622345 2002#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 2003static size_t
2004ctnetlink_nfqueue_build_size(const struct nf_conn *ct)
2005{
2006 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2007 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2008 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2009 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2010 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2011 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2012 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2013 + nla_total_size(0) /* CTA_PROTOINFO */
2014 + nla_total_size(0) /* CTA_HELP */
2015 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2016 + ctnetlink_secctx_size(ct)
2017#ifdef CONFIG_NF_NAT_NEEDED
2018 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2019 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2020#endif
2021#ifdef CONFIG_NF_CONNTRACK_MARK
2022 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
2023#endif
2024 + ctnetlink_proto_size(ct)
2025 ;
2026}
2027
2028static int
2029ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
2030{
2031 struct nlattr *nest_parms;
2032
2033 rcu_read_lock();
2034 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2035 if (!nest_parms)
2036 goto nla_put_failure;
2037 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2038 goto nla_put_failure;
2039 nla_nest_end(skb, nest_parms);
2040
2041 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2042 if (!nest_parms)
2043 goto nla_put_failure;
2044 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2045 goto nla_put_failure;
2046 nla_nest_end(skb, nest_parms);
2047
2048 if (nf_ct_zone(ct)) {
2049 if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
2050 goto nla_put_failure;
2051 }
2052
2053 if (ctnetlink_dump_id(skb, ct) < 0)
2054 goto nla_put_failure;
2055
2056 if (ctnetlink_dump_status(skb, ct) < 0)
2057 goto nla_put_failure;
2058
2059 if (ctnetlink_dump_timeout(skb, ct) < 0)
2060 goto nla_put_failure;
2061
2062 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2063 goto nla_put_failure;
2064
2065 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2066 goto nla_put_failure;
2067
2068#ifdef CONFIG_NF_CONNTRACK_SECMARK
2069 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2070 goto nla_put_failure;
2071#endif
2072 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2073 goto nla_put_failure;
2074
2075 if ((ct->status & IPS_SEQ_ADJUST) &&
2076 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
2077 goto nla_put_failure;
2078
2079#ifdef CONFIG_NF_CONNTRACK_MARK
2080 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2081 goto nla_put_failure;
2082#endif
0ceabd83
FW		 2083 if (ctnetlink_dump_labels(skb, ct) < 0)
2084 goto nla_put_failure;
9cb01766
PNA		 2085 rcu_read_unlock();
2086 return 0;
2087
2088nla_put_failure:
2089 rcu_read_unlock();
2090 return -ENOSPC;
2091}
2092
2093static int
2094ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
2095{
2096 int err;
2097
2098 if (cda[CTA_TIMEOUT]) {
2099 err = ctnetlink_change_timeout(ct, cda);
2100 if (err < 0)
2101 return err;
2102 }
2103 if (cda[CTA_STATUS]) {
2104 err = ctnetlink_change_status(ct, cda);
2105 if (err < 0)
2106 return err;
2107 }
2108 if (cda[CTA_HELP]) {
2109 err = ctnetlink_change_helper(ct, cda);
2110 if (err < 0)
2111 return err;
2112 }
9b21f6a9
FW		 2113 if (cda[CTA_LABELS]) {
2114 err = ctnetlink_attach_labels(ct, cda);
2115 if (err < 0)
2116 return err;
2117 }
9cb01766
PNA		 2118#if defined(CONFIG_NF_CONNTRACK_MARK)
2119 if (cda[CTA_MARK])
2120 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2121#endif
2122 return 0;
2123}
2124
2125static int
2126ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct)
2127{
2128 struct nlattr *cda[CTA_MAX+1];
68e035c9 2129 int ret;
9cb01766 2130
130ffbc2
DB		 2131 ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
2132 if (ret < 0)
2133 return ret;
9cb01766 2134
68e035c9
PNA		 2135 spin_lock_bh(&nf_conntrack_lock);
2136 ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct);
2137 spin_unlock_bh(&nf_conntrack_lock);
2138
2139 return ret;
9cb01766
PNA		 2140}
2141
2142static struct nfq_ct_hook ctnetlink_nfqueue_hook = {
2143 .build_size = ctnetlink_nfqueue_build_size,
2144 .build = ctnetlink_nfqueue_build,
2145 .parse = ctnetlink_nfqueue_parse,
2146};
7c622345 2147#endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
9cb01766 2148
601e68e1
YH		 2149/***********************************************************************
2150 * EXPECT
2151 ***********************************************************************/
c1d10adb
PNA		 2152
2153static inline int
2154ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2155 const struct nf_conntrack_tuple *tuple,
2156 enum ctattr_expect type)
2157{
df6fb868 2158 struct nlattr *nest_parms;
601e68e1 2159
df6fb868
PM		 2160 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2161 if (!nest_parms)
2162 goto nla_put_failure;
c1d10adb 2163 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2164 goto nla_put_failure;
2165 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2166
2167 return 0;
2168
df6fb868 2169nla_put_failure:
c1d10adb 2170 return -1;
601e68e1 2171}
c1d10adb 2172
1cde6436
PNA		 2173static inline int
2174ctnetlink_exp_dump_mask(struct sk_buff *skb,
2175 const struct nf_conntrack_tuple *tuple,
d4156e8c 2176 const struct nf_conntrack_tuple_mask *mask)
1cde6436
PNA		 2177{
2178 int ret;
2179 struct nf_conntrack_l3proto *l3proto;
605dcad6 2180 struct nf_conntrack_l4proto *l4proto;
d4156e8c 2181 struct nf_conntrack_tuple m;
df6fb868 2182 struct nlattr *nest_parms;
d4156e8c
PM		 2183
2184 memset(&m, 0xFF, sizeof(m));
d4156e8c 2185 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 2186 m.src.u.all = mask->src.u.all;
2187 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2188
df6fb868
PM		 2189 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2190 if (!nest_parms)
2191 goto nla_put_failure;
1cde6436 2192
3b988ece 2193 rcu_read_lock();
528a3a6f 2194 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 2195 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 2196 if (ret >= 0) {
2197 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2198 tuple->dst.protonum);
d4156e8c 2199 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2200 }
2201 rcu_read_unlock();
2202
1cde6436 2203 if (unlikely(ret < 0))
df6fb868 2204 goto nla_put_failure;
1cde6436 2205
df6fb868 2206 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2207
2208 return 0;
2209
df6fb868 2210nla_put_failure:
1cde6436
PNA		 2211 return -1;
2212}
2213
c7232c99
PM		 2214static const union nf_inet_addr any_addr;
2215
bb5cf80e 2216static int
c1d10adb 2217ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2218 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2219{
2220 struct nf_conn *master = exp->master;
c1216382 2221 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 2222 struct nf_conn_help *help;
076a0ca0
PNA		 2223#ifdef CONFIG_NF_NAT_NEEDED
2224 struct nlattr *nest_parms;
2225 struct nf_conntrack_tuple nat_tuple = {};
2226#endif
544d5c7d
PNA		 2227 struct nf_ct_helper_expectfn *expfn;
2228
d978e5da
PM		 2229 if (timeout < 0)
2230 timeout = 0;
c1d10adb
PNA		 2231
2232 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 2233 goto nla_put_failure;
1cde6436 2234 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 2235 goto nla_put_failure;
c1d10adb
PNA		 2236 if (ctnetlink_exp_dump_tuple(skb,
2237 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2238 CTA_EXPECT_MASTER) < 0)
df6fb868 2239 goto nla_put_failure;
601e68e1 2240
076a0ca0 2241#ifdef CONFIG_NF_NAT_NEEDED
c7232c99
PM		 2242 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2243 exp->saved_proto.all) {
076a0ca0
PNA		 2244 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2245 if (!nest_parms)
2246 goto nla_put_failure;
2247
cc1eb431
DM		 2248 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2249 goto nla_put_failure;
076a0ca0
PNA		 2250
2251 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 2252 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 2253 nat_tuple.dst.protonum = nf_ct_protonum(master);
2254 nat_tuple.src.u = exp->saved_proto;
2255
2256 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2257 CTA_EXPECT_NAT_TUPLE) < 0)
2258 goto nla_put_failure;
2259 nla_nest_end(skb, nest_parms);
2260 }
2261#endif
cc1eb431
DM		 2262 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2263 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2264 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2265 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2266 goto nla_put_failure;
bc01befd
PNA		 2267 help = nfct_help(master);
2268 if (help) {
2269 struct nf_conntrack_helper *helper;
2270
2271 helper = rcu_dereference(help->helper);
cc1eb431
DM		 2272 if (helper &&
2273 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2274 goto nla_put_failure;
bc01befd 2275 }
544d5c7d 2276 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 2277 if (expfn != NULL &&
2278 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2279 goto nla_put_failure;
c1d10adb
PNA		 2280
2281 return 0;
601e68e1 2282
df6fb868 2283nla_put_failure:
c1d10adb
PNA		 2284 return -1;
2285}
2286
2287static int
15e47304 2288ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 2289 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2290{
2291 struct nlmsghdr *nlh;
2292 struct nfgenmsg *nfmsg;
15e47304 2293 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb
PNA		 2294
2295 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2296 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 2297 if (nlh == NULL)
2298 goto nlmsg_failure;
c1d10adb 2299
96bcf938 2300 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2301 nfmsg->nfgen_family = exp->tuple.src.l3num;
2302 nfmsg->version = NFNETLINK_V0;
2303 nfmsg->res_id = 0;
2304
2305 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2306 goto nla_put_failure;
c1d10adb 2307
96bcf938 2308 nlmsg_end(skb, nlh);
c1d10adb
PNA		 2309 return skb->len;
2310
2311nlmsg_failure:
df6fb868 2312nla_put_failure:
96bcf938 2313 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 2314 return -1;
2315}
2316
2317#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2318static int
2319ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 2320{
9592a5c0
AD		 2321 struct nf_conntrack_expect *exp = item->exp;
2322 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 2323 struct nlmsghdr *nlh;
2324 struct nfgenmsg *nfmsg;
c1d10adb 2325 struct sk_buff *skb;
ebbf41df 2326 unsigned int type, group;
c1d10adb
PNA		 2327 int flags = 0;
2328
ebbf41df
PNA		 2329 if (events & (1 << IPEXP_DESTROY)) {
2330 type = IPCTNL_MSG_EXP_DELETE;
2331 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2332 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 2333 type = IPCTNL_MSG_EXP_NEW;
2334 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 2335 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 2336 } else
e34d5c1a 2337 return 0;
c1d10adb 2338
ebbf41df 2339 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 2340 return 0;
b3a27bfb 2341
96bcf938
PNA		 2342 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2343 if (skb == NULL)
150ace0d 2344 goto errout;
c1d10adb 2345
b633ad5f 2346 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2347 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 2348 if (nlh == NULL)
2349 goto nlmsg_failure;
c1d10adb 2350
96bcf938 2351 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2352 nfmsg->nfgen_family = exp->tuple.src.l3num;
2353 nfmsg->version = NFNETLINK_V0;
2354 nfmsg->res_id = 0;
2355
528a3a6f 2356 rcu_read_lock();
c1d10adb 2357 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2358 goto nla_put_failure;
528a3a6f 2359 rcu_read_unlock();
c1d10adb 2360
96bcf938 2361 nlmsg_end(skb, nlh);
15e47304 2362 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 2363 return 0;
c1d10adb 2364
df6fb868 2365nla_put_failure:
528a3a6f 2366 rcu_read_unlock();
96bcf938 2367 nlmsg_cancel(skb, nlh);
528a3a6f 2368nlmsg_failure:
c1d10adb 2369 kfree_skb(skb);
150ace0d 2370errout:
9592a5c0 2371 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 2372 return 0;
c1d10adb
PNA		 2373}
2374#endif
cf6994c2
PM		 2375static int ctnetlink_exp_done(struct netlink_callback *cb)
2376{
31f15875
PM		 2377 if (cb->args[1])
2378 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2379 return 0;
2380}
c1d10adb
PNA		 2381
2382static int
2383ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2384{
9592a5c0 2385 struct net *net = sock_net(skb->sk);
cf6994c2 2386 struct nf_conntrack_expect *exp, *last;
96bcf938 2387 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 2388 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2389
7d0742da 2390 rcu_read_lock();
31f15875
PM		 2391 last = (struct nf_conntrack_expect *)cb->args[1];
2392 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2393restart:
b67bfe0d 2394 hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]],
31f15875
PM		 2395 hnode) {
2396 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2397 continue;
31f15875
PM		 2398 if (cb->args[1]) {
2399 if (exp != last)
2400 continue;
2401 cb->args[1] = 0;
2402 }
8b0a231d 2403 if (ctnetlink_exp_fill_info(skb,
15e47304 2404 NETLINK_CB(cb->skb).portid,
31f15875
PM		 2405 cb->nlh->nlmsg_seq,
2406 IPCTNL_MSG_EXP_NEW,
8b0a231d 2407 exp) < 0) {
7d0742da
PM		 2408 if (!atomic_inc_not_zero(&exp->use))
2409 continue;
31f15875
PM		 2410 cb->args[1] = (unsigned long)exp;
2411 goto out;
2412 }
cf6994c2 2413 }
31f15875
PM		 2414 if (cb->args[1]) {
2415 cb->args[1] = 0;
2416 goto restart;
cf6994c2
PM		 2417 }
2418 }
601e68e1 2419out:
7d0742da 2420 rcu_read_unlock();
cf6994c2
PM		 2421 if (last)
2422 nf_ct_expect_put(last);
c1d10adb 2423
c1d10adb
PNA		 2424 return skb->len;
2425}
2426
e844a928
PNA		 2427static int
2428ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2429{
2430 struct nf_conntrack_expect *exp, *last;
2431 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2432 struct nf_conn *ct = cb->data;
2433 struct nf_conn_help *help = nfct_help(ct);
2434 u_int8_t l3proto = nfmsg->nfgen_family;
2435
2436 if (cb->args[0])
2437 return 0;
2438
2439 rcu_read_lock();
2440 last = (struct nf_conntrack_expect *)cb->args[1];
2441restart:
2442 hlist_for_each_entry(exp, &help->expectations, lnode) {
2443 if (l3proto && exp->tuple.src.l3num != l3proto)
2444 continue;
2445 if (cb->args[1]) {
2446 if (exp != last)
2447 continue;
2448 cb->args[1] = 0;
2449 }
2450 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2451 cb->nlh->nlmsg_seq,
2452 IPCTNL_MSG_EXP_NEW,
2453 exp) < 0) {
2454 if (!atomic_inc_not_zero(&exp->use))
2455 continue;
2456 cb->args[1] = (unsigned long)exp;
2457 goto out;
2458 }
2459 }
2460 if (cb->args[1]) {
2461 cb->args[1] = 0;
2462 goto restart;
2463 }
2464 cb->args[0] = 1;
2465out:
2466 rcu_read_unlock();
2467 if (last)
2468 nf_ct_expect_put(last);
2469
2470 return skb->len;
2471}
2472
2473static int ctnetlink_dump_exp_ct(struct sock *ctnl, struct sk_buff *skb,
2474 const struct nlmsghdr *nlh,
2475 const struct nlattr * const cda[])
2476{
2477 int err;
2478 struct net *net = sock_net(ctnl);
2479 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2480 u_int8_t u3 = nfmsg->nfgen_family;
2481 struct nf_conntrack_tuple tuple;
2482 struct nf_conntrack_tuple_hash *h;
2483 struct nf_conn *ct;
2484 u16 zone = 0;
2485 struct netlink_dump_control c = {
2486 .dump = ctnetlink_exp_ct_dump_table,
2487 .done = ctnetlink_exp_done,
2488 };
2489
2490 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2491 if (err < 0)
2492 return err;
2493
2494 if (cda[CTA_EXPECT_ZONE]) {
2495 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2496 if (err < 0)
2497 return err;
2498 }
2499
2500 h = nf_conntrack_find_get(net, zone, &tuple);
2501 if (!h)
2502 return -ENOENT;
2503
2504 ct = nf_ct_tuplehash_to_ctrack(h);
2505 c.data = ct;
2506
2507 err = netlink_dump_start(ctnl, skb, nlh, &c);
2508 nf_ct_put(ct);
2509
2510 return err;
2511}
2512
f73e924c 2513static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
d0b0268f
PM		 2514 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2515 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2516 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
f73e924c
PM		 2517 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2518 [CTA_EXPECT_ID] = { .type = NLA_U32 },
6d1fafca
FW		 2519 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2520 .len = NF_CT_HELPER_NAME_LEN - 1 },
bcac0dfa 2521 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
8b008faf 2522 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
b8c5e52c 2523 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
076a0ca0 2524 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
544d5c7d 2525 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
c1d10adb
PNA		 2526};
2527
2528static int
601e68e1 2529ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2530 const struct nlmsghdr *nlh,
2531 const struct nlattr * const cda[])
c1d10adb 2532{
9592a5c0 2533 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2534 struct nf_conntrack_tuple tuple;
2535 struct nf_conntrack_expect *exp;
2536 struct sk_buff *skb2;
96bcf938 2537 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2538 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2539 u16 zone;
2540 int err;
c1d10adb 2541
b8f3ab42 2542 if (nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928
PNA		 2543 if (cda[CTA_EXPECT_MASTER])
2544 return ctnetlink_dump_exp_ct(ctnl, skb, nlh, cda);
2545 else {
2546 struct netlink_dump_control c = {
2547 .dump = ctnetlink_exp_dump_table,
2548 .done = ctnetlink_exp_done,
2549 };
2550 return netlink_dump_start(ctnl, skb, nlh, &c);
2551 }
c1d10adb
PNA		 2552 }
2553
ef00f89f
PM		 2554 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2555 if (err < 0)
2556 return err;
2557
35dba1d7
PNA		 2558 if (cda[CTA_EXPECT_TUPLE])
2559 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2560 else if (cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2561 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2562 else
2563 return -EINVAL;
2564
2565 if (err < 0)
2566 return err;
2567
ef00f89f 2568 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2569 if (!exp)
2570 return -ENOENT;
2571
df6fb868 2572 if (cda[CTA_EXPECT_ID]) {
77236b6e 2573 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2574 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2575 nf_ct_expect_put(exp);
c1d10adb
PNA		 2576 return -ENOENT;
2577 }
601e68e1 2578 }
c1d10adb
PNA		 2579
2580 err = -ENOMEM;
96bcf938 2581 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2582 if (skb2 == NULL) {
2583 nf_ct_expect_put(exp);
c1d10adb 2584 goto out;
81378f72 2585 }
4e9b8269 2586
528a3a6f 2587 rcu_read_lock();
15e47304 2588 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
8b0a231d 2589 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2590 rcu_read_unlock();
81378f72 2591 nf_ct_expect_put(exp);
c1d10adb
PNA		 2592 if (err <= 0)
2593 goto free;
2594
15e47304 2595 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
81378f72
PNA		 2596 if (err < 0)
2597 goto out;
c1d10adb 2598
81378f72 2599 return 0;
c1d10adb
PNA		 2600
2601free:
2602 kfree_skb(skb2);
2603out:
81378f72
PNA		 2604 /* this avoids a loop in nfnetlink. */
2605 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2606}
2607
2608static int
601e68e1 2609ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2610 const struct nlmsghdr *nlh,
2611 const struct nlattr * const cda[])
c1d10adb 2612{
9592a5c0 2613 struct net *net = sock_net(ctnl);
31f15875 2614 struct nf_conntrack_expect *exp;
c1d10adb 2615 struct nf_conntrack_tuple tuple;
96bcf938 2616 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
b67bfe0d 2617 struct hlist_node *next;
c1d10adb 2618 u_int8_t u3 = nfmsg->nfgen_family;
31f15875 2619 unsigned int i;
ef00f89f 2620 u16 zone;
c1d10adb
PNA		 2621 int err;
2622
df6fb868 2623 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2624 /* delete a single expect by tuple */
ef00f89f
PM		 2625 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2626 if (err < 0)
2627 return err;
2628
c1d10adb
PNA		 2629 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2630 if (err < 0)
2631 return err;
2632
2633 /* bump usage count to 2 */
ef00f89f 2634 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2635 if (!exp)
2636 return -ENOENT;
2637
df6fb868 2638 if (cda[CTA_EXPECT_ID]) {
77236b6e 2639 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2640 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2641 nf_ct_expect_put(exp);
c1d10adb
PNA		 2642 return -ENOENT;
2643 }
2644 }
2645
2646 /* after list removal, usage count == 1 */
ebbf41df
PNA		 2647 spin_lock_bh(&nf_conntrack_lock);
2648 if (del_timer(&exp->timeout)) {
15e47304 2649 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
ebbf41df
PNA		 2650 nlmsg_report(nlh));
2651 nf_ct_expect_put(exp);
2652 }
2653 spin_unlock_bh(&nf_conntrack_lock);
601e68e1 2654 /* have to put what we 'get' above.
c1d10adb 2655 * after this line usage count == 0 */
6823645d 2656 nf_ct_expect_put(exp);
df6fb868
PM		 2657 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2658 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
31f15875 2659 struct nf_conn_help *m_help;
c1d10adb
PNA		 2660
2661 /* delete all expectations for this helper */
f8ba1aff 2662 spin_lock_bh(&nf_conntrack_lock);
31f15875 2663 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2664 hlist_for_each_entry_safe(exp, next,
9592a5c0 2665 &net->ct.expect_hash[i],
31f15875
PM		 2666 hnode) {
2667 m_help = nfct_help(exp->master);
794e6871
PM		 2668 if (!strcmp(m_help->helper->name, name) &&
2669 del_timer(&exp->timeout)) {
ebbf41df 2670 nf_ct_unlink_expect_report(exp,
15e47304 2671 NETLINK_CB(skb).portid,
ebbf41df 2672 nlmsg_report(nlh));
31f15875
PM		 2673 nf_ct_expect_put(exp);
2674 }
c1d10adb
PNA		 2675 }
2676 }
f8ba1aff 2677 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2678 } else {
2679 /* This basically means we have to flush everything*/
f8ba1aff 2680 spin_lock_bh(&nf_conntrack_lock);
31f15875 2681 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2682 hlist_for_each_entry_safe(exp, next,
9592a5c0 2683 &net->ct.expect_hash[i],
31f15875
PM		 2684 hnode) {
2685 if (del_timer(&exp->timeout)) {
ebbf41df 2686 nf_ct_unlink_expect_report(exp,
15e47304 2687 NETLINK_CB(skb).portid,
ebbf41df 2688 nlmsg_report(nlh));
31f15875
PM		 2689 nf_ct_expect_put(exp);
2690 }
c1d10adb
PNA		 2691 }
2692 }
f8ba1aff 2693 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2694 }
2695
2696 return 0;
2697}
2698static int
39938324
PM		 2699ctnetlink_change_expect(struct nf_conntrack_expect *x,
2700 const struct nlattr * const cda[])
c1d10adb 2701{
9768e1ac
KW		 2702 if (cda[CTA_EXPECT_TIMEOUT]) {
2703 if (!del_timer(&x->timeout))
2704 return -ETIME;
2705
2706 x->timeout.expires = jiffies +
2707 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2708 add_timer(&x->timeout);
2709 }
2710 return 0;
c1d10adb
PNA		 2711}
2712
076a0ca0
PNA		 2713static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2714 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2715 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2716};
2717
2718static int
2719ctnetlink_parse_expect_nat(const struct nlattr *attr,
2720 struct nf_conntrack_expect *exp,
2721 u_int8_t u3)
2722{
2723#ifdef CONFIG_NF_NAT_NEEDED
2724 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2725 struct nf_conntrack_tuple nat_tuple = {};
2726 int err;
2727
130ffbc2
DB		 2728 err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2729 if (err < 0)
2730 return err;
076a0ca0
PNA		 2731
2732 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2733 return -EINVAL;
2734
2735 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2736 &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3);
2737 if (err < 0)
2738 return err;
2739
c7232c99 2740 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 2741 exp->saved_proto = nat_tuple.src.u;
2742 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2743
2744 return 0;
2745#else
2746 return -EOPNOTSUPP;
2747#endif
2748}
2749
c1d10adb 2750static int
ef00f89f
PM		 2751ctnetlink_create_expect(struct net *net, u16 zone,
2752 const struct nlattr * const cda[],
9592a5c0 2753 u_int8_t u3,
15e47304 2754 u32 portid, int report)
c1d10adb
PNA		 2755{
2756 struct nf_conntrack_tuple tuple, mask, master_tuple;
2757 struct nf_conntrack_tuple_hash *h = NULL;
2758 struct nf_conntrack_expect *exp;
2759 struct nf_conn *ct;
dc808fe2 2760 struct nf_conn_help *help;
660fdb2a 2761 struct nf_conntrack_helper *helper = NULL;
b8c5e52c 2762 u_int32_t class = 0;
c1d10adb
PNA		 2763 int err = 0;
2764
c1d10adb
PNA		 2765 /* caller guarantees that those three CTA_EXPECT_* exist */
2766 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2767 if (err < 0)
2768 return err;
2769 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
2770 if (err < 0)
2771 return err;
2772 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
2773 if (err < 0)
2774 return err;
2775
2776 /* Look for master conntrack of this expectation */
ef00f89f 2777 h = nf_conntrack_find_get(net, zone, &master_tuple);
c1d10adb
PNA		 2778 if (!h)
2779 return -ENOENT;
2780 ct = nf_ct_tuplehash_to_ctrack(h);
660fdb2a
PNA		 2781
2782 /* Look for helper of this expectation */
2783 if (cda[CTA_EXPECT_HELP_NAME]) {
2784 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2785
2786 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2787 nf_ct_protonum(ct));
2788 if (helper == NULL) {
2789#ifdef CONFIG_MODULES
2790 if (request_module("nfct-helper-%s", helpname) < 0) {
2791 err = -EOPNOTSUPP;
2792 goto out;
2793 }
2794
2795 helper = __nf_conntrack_helper_find(helpname,
2796 nf_ct_l3num(ct),
2797 nf_ct_protonum(ct));
2798 if (helper) {
2799 err = -EAGAIN;
2800 goto out;
2801 }
2802#endif
2803 err = -EOPNOTSUPP;
2804 goto out;
2805 }
2806 }
2807
b8c5e52c
PNA		 2808 if (cda[CTA_EXPECT_CLASS] && helper) {
2809 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
2810 if (class > helper->expect_class_max) {
2811 err = -EINVAL;
2812 goto out;
2813 }
2814 }
6823645d 2815 exp = nf_ct_expect_alloc(ct);
c1d10adb
PNA		 2816 if (!exp) {
2817 err = -ENOMEM;
2818 goto out;
2819 }
bc01befd
PNA		 2820 help = nfct_help(ct);
2821 if (!help) {
2822 if (!cda[CTA_EXPECT_TIMEOUT]) {
2823 err = -EINVAL;
1310b955 2824 goto err_out;
bc01befd
PNA		 2825 }
2826 exp->timeout.expires =
2827 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
601e68e1 2828
bc01befd
PNA		 2829 exp->flags = NF_CT_EXPECT_USERSPACE;
2830 if (cda[CTA_EXPECT_FLAGS]) {
2831 exp->flags |=
2832 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2833 }
2834 } else {
2835 if (cda[CTA_EXPECT_FLAGS]) {
2836 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2837 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
2838 } else
2839 exp->flags = 0;
2840 }
544d5c7d
PNA		 2841 if (cda[CTA_EXPECT_FN]) {
2842 const char *name = nla_data(cda[CTA_EXPECT_FN]);
2843 struct nf_ct_helper_expectfn *expfn;
2844
2845 expfn = nf_ct_helper_expectfn_find_by_name(name);
2846 if (expfn == NULL) {
2847 err = -EINVAL;
2848 goto err_out;
2849 }
2850 exp->expectfn = expfn->expectfn;
2851 } else
2852 exp->expectfn = NULL;
601e68e1 2853
b8c5e52c 2854 exp->class = class;
c1d10adb 2855 exp->master = ct;
660fdb2a 2856 exp->helper = helper;
c1d10adb 2857 memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
d4156e8c
PM		 2858 memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
2859 exp->mask.src.u.all = mask.src.u.all;
c1d10adb 2860
076a0ca0
PNA		 2861 if (cda[CTA_EXPECT_NAT]) {
2862 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
2863 exp, u3);
2864 if (err < 0)
2865 goto err_out;
2866 }
15e47304 2867 err = nf_ct_expect_related_report(exp, portid, report);
076a0ca0 2868err_out:
6823645d 2869 nf_ct_expect_put(exp);
601e68e1 2870out:
c1d10adb
PNA		 2871 nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
2872 return err;
2873}
2874
2875static int
2876ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2877 const struct nlmsghdr *nlh,
2878 const struct nlattr * const cda[])
c1d10adb 2879{
9592a5c0 2880 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2881 struct nf_conntrack_tuple tuple;
2882 struct nf_conntrack_expect *exp;
96bcf938 2883 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2884 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2885 u16 zone;
2886 int err;
c1d10adb 2887
df6fb868
PM		 2888 if (!cda[CTA_EXPECT_TUPLE]
2889 || !cda[CTA_EXPECT_MASK]
2890 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2891 return -EINVAL;
2892
ef00f89f
PM		 2893 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2894 if (err < 0)
2895 return err;
2896
c1d10adb
PNA		 2897 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2898 if (err < 0)
2899 return err;
2900
f8ba1aff 2901 spin_lock_bh(&nf_conntrack_lock);
ef00f89f 2902 exp = __nf_ct_expect_find(net, zone, &tuple);
c1d10adb
PNA		 2903
2904 if (!exp) {
f8ba1aff 2905 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2906 err = -ENOENT;
19abb7b0 2907 if (nlh->nlmsg_flags & NLM_F_CREATE) {
ef00f89f 2908 err = ctnetlink_create_expect(net, zone, cda,
19abb7b0 2909 u3,
15e47304 2910 NETLINK_CB(skb).portid,
19abb7b0
PNA		 2911 nlmsg_report(nlh));
2912 }
c1d10adb
PNA		 2913 return err;
2914 }
2915
2916 err = -EEXIST;
2917 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
2918 err = ctnetlink_change_expect(exp, cda);
f8ba1aff 2919 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2920
c1d10adb
PNA		 2921 return err;
2922}
2923
392025f8 2924static int
15e47304 2925ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 2926 const struct ip_conntrack_stat *st)
2927{
2928 struct nlmsghdr *nlh;
2929 struct nfgenmsg *nfmsg;
15e47304 2930 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 2931
2932 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU);
15e47304 2933 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2934 if (nlh == NULL)
2935 goto nlmsg_failure;
2936
2937 nfmsg = nlmsg_data(nlh);
2938 nfmsg->nfgen_family = AF_UNSPEC;
2939 nfmsg->version = NFNETLINK_V0;
2940 nfmsg->res_id = htons(cpu);
2941
2942 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
2943 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
2944 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
2945 goto nla_put_failure;
2946
2947 nlmsg_end(skb, nlh);
2948 return skb->len;
2949
2950nla_put_failure:
2951nlmsg_failure:
2952 nlmsg_cancel(skb, nlh);
2953 return -1;
2954}
2955
2956static int
2957ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2958{
2959 int cpu;
2960 struct net *net = sock_net(skb->sk);
2961
2962 if (cb->args[0] == nr_cpu_ids)
2963 return 0;
2964
2965 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2966 const struct ip_conntrack_stat *st;
2967
2968 if (!cpu_possible(cpu))
2969 continue;
2970
2971 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 2972 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2973 cb->nlh->nlmsg_seq,
2974 cpu, st) < 0)
2975 break;
2976 }
2977 cb->args[0] = cpu;
2978
2979 return skb->len;
2980}
2981
2982static int
2983ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb,
2984 const struct nlmsghdr *nlh,
2985 const struct nlattr * const cda[])
2986{
2987 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2988 struct netlink_dump_control c = {
2989 .dump = ctnetlink_exp_stat_cpu_dump,
2990 };
2991 return netlink_dump_start(ctnl, skb, nlh, &c);
2992 }
2993
2994 return 0;
2995}
2996
c1d10adb 2997#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2998static struct nf_ct_event_notifier ctnl_notifier = {
2999 .fcn = ctnetlink_conntrack_event,
c1d10adb
PNA		 3000};
3001
e34d5c1a
PNA		 3002static struct nf_exp_event_notifier ctnl_notifier_exp = {
3003 .fcn = ctnetlink_expect_event,
c1d10adb
PNA		 3004};
3005#endif
3006
7c8d4cb4 3007static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
c1d10adb 3008 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
f73e924c
PM		 3009 .attr_count = CTA_MAX,
3010 .policy = ct_nla_policy },
c1d10adb 3011 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3012 .attr_count = CTA_MAX,
3013 .policy = ct_nla_policy },
c1d10adb 3014 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
f73e924c
PM		 3015 .attr_count = CTA_MAX,
3016 .policy = ct_nla_policy },
c1d10adb 3017 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3018 .attr_count = CTA_MAX,
3019 .policy = ct_nla_policy },
392025f8
PNA		 3020 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
3021 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
d871befe
PNA		 3022 [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying },
3023 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed },
c1d10adb
PNA		 3024};
3025
7c8d4cb4 3026static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
c1d10adb 3027 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
f73e924c
PM		 3028 .attr_count = CTA_EXPECT_MAX,
3029 .policy = exp_nla_policy },
c1d10adb 3030 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
f73e924c
PM		 3031 .attr_count = CTA_EXPECT_MAX,
3032 .policy = exp_nla_policy },
c1d10adb 3033 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
f73e924c
PM		 3034 .attr_count = CTA_EXPECT_MAX,
3035 .policy = exp_nla_policy },
392025f8 3036 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
c1d10adb
PNA		 3037};
3038
7c8d4cb4 3039static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 3040 .name = "conntrack",
3041 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3042 .cb_count = IPCTNL_MSG_MAX,
3043 .cb = ctnl_cb,
3044};
3045
7c8d4cb4 3046static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 3047 .name = "conntrack_expect",
3048 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3049 .cb_count = IPCTNL_MSG_EXP_MAX,
3050 .cb = ctnl_exp_cb,
3051};
3052
d2483dde 3053MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 3054MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 3055MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 3056
70e9942f
PNA		 3057static int __net_init ctnetlink_net_init(struct net *net)
3058{
3059#ifdef CONFIG_NF_CONNTRACK_EVENTS
3060 int ret;
3061
3062 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
3063 if (ret < 0) {
3064 pr_err("ctnetlink_init: cannot register notifier.\n");
3065 goto err_out;
3066 }
3067
3068 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
3069 if (ret < 0) {
3070 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3071 goto err_unreg_notifier;
3072 }
3073#endif
3074 return 0;
3075
3076#ifdef CONFIG_NF_CONNTRACK_EVENTS
3077err_unreg_notifier:
3078 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3079err_out:
3080 return ret;
3081#endif
3082}
3083
3084static void ctnetlink_net_exit(struct net *net)
3085{
3086#ifdef CONFIG_NF_CONNTRACK_EVENTS
3087 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
3088 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3089#endif
3090}
3091
3092static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
3093{
3094 struct net *net;
3095
3096 list_for_each_entry(net, net_exit_list, exit_list)
3097 ctnetlink_net_exit(net);
3098}
3099
3100static struct pernet_operations ctnetlink_net_ops = {
3101 .init = ctnetlink_net_init,
3102 .exit_batch = ctnetlink_net_exit_batch,
3103};
3104
c1d10adb
PNA		 3105static int __init ctnetlink_init(void)
3106{
3107 int ret;
3108
654d0fbd 3109 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
c1d10adb
PNA		 3110 ret = nfnetlink_subsys_register(&ctnl_subsys);
3111 if (ret < 0) {
654d0fbd 3112 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 3113 goto err_out;
3114 }
3115
3116 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3117 if (ret < 0) {
654d0fbd 3118 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 3119 goto err_unreg_subsys;
3120 }
3121
ef6acf68
JL		 3122 ret = register_pernet_subsys(&ctnetlink_net_ops);
3123 if (ret < 0) {
70e9942f 3124 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 3125 goto err_unreg_exp_subsys;
3126 }
7c622345 3127#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 3128 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3129 RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook);
3130#endif
c1d10adb
PNA		 3131 return 0;
3132
c1d10adb
PNA		 3133err_unreg_exp_subsys:
3134 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 3135err_unreg_subsys:
3136 nfnetlink_subsys_unregister(&ctnl_subsys);
3137err_out:
3138 return ret;
3139}
3140
3141static void __exit ctnetlink_exit(void)
3142{
654d0fbd 3143 pr_info("ctnetlink: unregistering from nfnetlink.\n");
c1d10adb 3144
70e9942f 3145 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 3146 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3147 nfnetlink_subsys_unregister(&ctnl_subsys);
7c622345 3148#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 3149 RCU_INIT_POINTER(nfq_ct_hook, NULL);
3150#endif
c1d10adb
PNA		 3151}
3152
3153module_init(ctnetlink_init);
3154module_exit(ctnetlink_exit);
Linux kernel - Deliverables
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