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Merge tag 'linux-can-next-for-3.18-20140820' of git://gitorious.org/linux-can/linux...
[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 39#include <net/netfilter/nf_conntrack_helper.h>
41d73ec0 40#include <net/netfilter/nf_conntrack_seqadj.h>
c1d10adb 41#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6 42#include <net/netfilter/nf_conntrack_l4proto.h>
5b1158e9 43#include <net/netfilter/nf_conntrack_tuple.h>
58401572 44#include <net/netfilter/nf_conntrack_acct.h>
ef00f89f 45#include <net/netfilter/nf_conntrack_zones.h>
a992ca2a 46#include <net/netfilter/nf_conntrack_timestamp.h>
c539f017 47#include <net/netfilter/nf_conntrack_labels.h>
5b1158e9
JK		 48#ifdef CONFIG_NF_NAT_NEEDED
49#include <net/netfilter/nf_nat_core.h>
c7232c99 50#include <net/netfilter/nf_nat_l4proto.h>
8c88f87c 51#include <net/netfilter/nf_nat_helper.h>
5b1158e9 52#endif
c1d10adb
PNA		 53
54#include <linux/netfilter/nfnetlink.h>
55#include <linux/netfilter/nfnetlink_conntrack.h>
56
57MODULE_LICENSE("GPL");
58
dc808fe2 59static char __initdata version[] = "0.93";
c1d10adb 60
c1d10adb 61static inline int
601e68e1 62ctnetlink_dump_tuples_proto(struct sk_buff *skb,
1cde6436 63 const struct nf_conntrack_tuple *tuple,
605dcad6 64 struct nf_conntrack_l4proto *l4proto)
c1d10adb 65{
c1d10adb 66 int ret = 0;
df6fb868 67 struct nlattr *nest_parms;
c1d10adb 68
df6fb868
PM		 69 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
70 if (!nest_parms)
71 goto nla_put_failure;
cc1eb431
DM		 72 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
73 goto nla_put_failure;
c1d10adb 74
fdf70832
PM		 75 if (likely(l4proto->tuple_to_nlattr))
76 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 77
df6fb868 78 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 79
80 return ret;
81
df6fb868 82nla_put_failure:
c1d10adb
PNA		 83 return -1;
84}
85
86static inline int
1cde6436
PNA		 87ctnetlink_dump_tuples_ip(struct sk_buff *skb,
88 const struct nf_conntrack_tuple *tuple,
89 struct nf_conntrack_l3proto *l3proto)
c1d10adb 90{
c1d10adb 91 int ret = 0;
df6fb868
PM		 92 struct nlattr *nest_parms;
93
94 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
95 if (!nest_parms)
96 goto nla_put_failure;
1cde6436 97
fdf70832
PM		 98 if (likely(l3proto->tuple_to_nlattr))
99 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 100
df6fb868 101 nla_nest_end(skb, nest_parms);
c1d10adb 102
1cde6436
PNA		 103 return ret;
104
df6fb868 105nla_put_failure:
1cde6436
PNA		 106 return -1;
107}
108
bb5cf80e 109static int
1cde6436
PNA		 110ctnetlink_dump_tuples(struct sk_buff *skb,
111 const struct nf_conntrack_tuple *tuple)
112{
113 int ret;
114 struct nf_conntrack_l3proto *l3proto;
605dcad6 115 struct nf_conntrack_l4proto *l4proto;
1cde6436 116
3b988ece 117 rcu_read_lock();
528a3a6f 118 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 119 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 120
3b988ece
HS		 121 if (ret >= 0) {
122 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
123 tuple->dst.protonum);
124 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
125 }
126 rcu_read_unlock();
c1d10adb 127 return ret;
c1d10adb
PNA		 128}
129
130static inline int
131ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
132{
cc1eb431
DM		 133 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
134 goto nla_put_failure;
c1d10adb
PNA		 135 return 0;
136
df6fb868 137nla_put_failure:
c1d10adb
PNA		 138 return -1;
139}
140
141static inline int
142ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
143{
c1216382 144 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
c1d10adb 145
77236b6e 146 if (timeout < 0)
c1d10adb 147 timeout = 0;
601e68e1 148
cc1eb431
DM		 149 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
150 goto nla_put_failure;
c1d10adb
PNA		 151 return 0;
152
df6fb868 153nla_put_failure:
c1d10adb
PNA		 154 return -1;
155}
156
157static inline int
440f0d58 158ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 159{
5e8fbe2a 160 struct nf_conntrack_l4proto *l4proto;
df6fb868 161 struct nlattr *nest_proto;
c1d10adb
PNA		 162 int ret;
163
528a3a6f
PNA		 164 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
165 if (!l4proto->to_nlattr)
c1d10adb 166 return 0;
601e68e1 167
df6fb868
PM		 168 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
169 if (!nest_proto)
170 goto nla_put_failure;
c1d10adb 171
fdf70832 172 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 173
df6fb868 174 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 175
176 return ret;
177
df6fb868 178nla_put_failure:
c1d10adb
PNA		 179 return -1;
180}
181
182static inline int
183ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
184{
df6fb868 185 struct nlattr *nest_helper;
dc808fe2 186 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 187 struct nf_conntrack_helper *helper;
c1d10adb 188
3c158f7f 189 if (!help)
c1d10adb 190 return 0;
601e68e1 191
3c158f7f
PM		 192 helper = rcu_dereference(help->helper);
193 if (!helper)
194 goto out;
195
df6fb868
PM		 196 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
197 if (!nest_helper)
198 goto nla_put_failure;
cc1eb431
DM		 199 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
200 goto nla_put_failure;
c1d10adb 201
fdf70832
PM		 202 if (helper->to_nlattr)
203 helper->to_nlattr(skb, ct);
c1d10adb 204
df6fb868 205 nla_nest_end(skb, nest_helper);
3c158f7f 206out:
c1d10adb
PNA		 207 return 0;
208
df6fb868 209nla_put_failure:
c1d10adb
PNA		 210 return -1;
211}
212
bb5cf80e 213static int
4542fa47
HE		 214dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
215 enum ip_conntrack_dir dir, int type)
c1d10adb 216{
4542fa47
HE		 217 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
218 struct nf_conn_counter *counter = acct->counter;
df6fb868 219 struct nlattr *nest_count;
4542fa47 220 u64 pkts, bytes;
c1d10adb 221
4542fa47
HE		 222 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
223 pkts = atomic64_xchg(&counter[dir].packets, 0);
224 bytes = atomic64_xchg(&counter[dir].bytes, 0);
225 } else {
226 pkts = atomic64_read(&counter[dir].packets);
227 bytes = atomic64_read(&counter[dir].bytes);
228 }
229
230 nest_count = nla_nest_start(skb, attr | NLA_F_NESTED);
df6fb868
PM		 231 if (!nest_count)
232 goto nla_put_failure;
233
cc1eb431
DM		 234 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) ||
235 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes)))
236 goto nla_put_failure;
c1d10adb 237
df6fb868 238 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 239
240 return 0;
241
df6fb868 242nla_put_failure:
c1d10adb
PNA		 243 return -1;
244}
c1d10adb 245
80e60e67 246static int
4542fa47 247ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
80e60e67 248{
4542fa47 249 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
80e60e67 250
80e60e67
PNA		 251 if (!acct)
252 return 0;
253
4542fa47
HE		 254 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
255 return -1;
256 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
257 return -1;
258
259 return 0;
80e60e67
PNA		 260}
261
a992ca2a
PNA		 262static int
263ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
264{
265 struct nlattr *nest_count;
266 const struct nf_conn_tstamp *tstamp;
267
268 tstamp = nf_conn_tstamp_find(ct);
269 if (!tstamp)
270 return 0;
271
272 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
273 if (!nest_count)
274 goto nla_put_failure;
275
cc1eb431
DM		 276 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) ||
277 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
278 cpu_to_be64(tstamp->stop))))
279 goto nla_put_failure;
a992ca2a
PNA		 280 nla_nest_end(skb, nest_count);
281
282 return 0;
283
284nla_put_failure:
285 return -1;
286}
287
c1d10adb
PNA		 288#ifdef CONFIG_NF_CONNTRACK_MARK
289static inline int
290ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
291{
cc1eb431
DM		 292 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
293 goto nla_put_failure;
c1d10adb
PNA		 294 return 0;
295
df6fb868 296nla_put_failure:
c1d10adb
PNA		 297 return -1;
298}
299#else
300#define ctnetlink_dump_mark(a, b) (0)
301#endif
302
37fccd85
PNA		 303#ifdef CONFIG_NF_CONNTRACK_SECMARK
304static inline int
1cc63249 305ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 306{
1cc63249
EP		 307 struct nlattr *nest_secctx;
308 int len, ret;
309 char *secctx;
310
311 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
312 if (ret)
cba85b53 313 return 0;
1cc63249
EP		 314
315 ret = -1;
316 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
317 if (!nest_secctx)
318 goto nla_put_failure;
37fccd85 319
cc1eb431
DM		 320 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
321 goto nla_put_failure;
1cc63249
EP		 322 nla_nest_end(skb, nest_secctx);
323
324 ret = 0;
37fccd85 325nla_put_failure:
1cc63249
EP		 326 security_release_secctx(secctx, len);
327 return ret;
37fccd85
PNA		 328}
329#else
1cc63249 330#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 331#endif
332
0ceabd83
FW		 333#ifdef CONFIG_NF_CONNTRACK_LABELS
334static int ctnetlink_label_size(const struct nf_conn *ct)
335{
336 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
337
338 if (!labels)
339 return 0;
340 return nla_total_size(labels->words * sizeof(long));
341}
342
343static int
344ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
345{
346 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
347 unsigned int len, i;
348
349 if (!labels)
350 return 0;
351
352 len = labels->words * sizeof(long);
353 i = 0;
354 do {
355 if (labels->bits[i] != 0)
356 return nla_put(skb, CTA_LABELS, len, labels->bits);
357 i++;
358 } while (i < labels->words);
359
360 return 0;
361}
362#else
363#define ctnetlink_dump_labels(a, b) (0)
364#define ctnetlink_label_size(a) (0)
365#endif
366
0f417ce9
PNA		 367#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
368
369static inline int
370ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
371{
372 struct nlattr *nest_parms;
373
374 if (!(ct->status & IPS_EXPECTED))
375 return 0;
376
377 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
378 if (!nest_parms)
379 goto nla_put_failure;
380 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
381 goto nla_put_failure;
382 nla_nest_end(skb, nest_parms);
383
384 return 0;
385
386nla_put_failure:
387 return -1;
388}
389
bb5cf80e 390static int
41d73ec0 391dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
13eae15a 392{
13eae15a
PNA		 393 struct nlattr *nest_parms;
394
395 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
396 if (!nest_parms)
397 goto nla_put_failure;
398
41d73ec0
PM		 399 if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
400 htonl(seq->correction_pos)) ||
401 nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
402 htonl(seq->offset_before)) ||
403 nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
404 htonl(seq->offset_after)))
cc1eb431 405 goto nla_put_failure;
13eae15a
PNA		 406
407 nla_nest_end(skb, nest_parms);
408
409 return 0;
410
411nla_put_failure:
412 return -1;
413}
414
415static inline int
41d73ec0 416ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
13eae15a 417{
41d73ec0
PM		 418 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
419 struct nf_ct_seqadj *seq;
13eae15a 420
41d73ec0 421 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
13eae15a
PNA		 422 return 0;
423
41d73ec0
PM		 424 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
425 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
13eae15a
PNA		 426 return -1;
427
41d73ec0
PM		 428 seq = &seqadj->seq[IP_CT_DIR_REPLY];
429 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
13eae15a
PNA		 430 return -1;
431
432 return 0;
433}
13eae15a 434
c1d10adb
PNA		 435static inline int
436ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
437{
cc1eb431
DM		 438 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
439 goto nla_put_failure;
c1d10adb
PNA		 440 return 0;
441
df6fb868 442nla_put_failure:
c1d10adb
PNA		 443 return -1;
444}
445
446static inline int
447ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
448{
cc1eb431
DM		 449 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
450 goto nla_put_failure;
c1d10adb
PNA		 451 return 0;
452
df6fb868 453nla_put_failure:
c1d10adb
PNA		 454 return -1;
455}
456
c1d10adb 457static int
15e47304 458ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
80e60e67 459 struct nf_conn *ct)
c1d10adb
PNA		 460{
461 struct nlmsghdr *nlh;
462 struct nfgenmsg *nfmsg;
df6fb868 463 struct nlattr *nest_parms;
15e47304 464 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c1d10adb 465
80e60e67 466 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
15e47304 467 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 468 if (nlh == NULL)
469 goto nlmsg_failure;
c1d10adb 470
96bcf938 471 nfmsg = nlmsg_data(nlh);
5e8fbe2a 472 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 473 nfmsg->version = NFNETLINK_V0;
474 nfmsg->res_id = 0;
475
df6fb868
PM		 476 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
477 if (!nest_parms)
478 goto nla_put_failure;
f2f3e38c 479 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 480 goto nla_put_failure;
481 nla_nest_end(skb, nest_parms);
601e68e1 482
df6fb868
PM		 483 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
484 if (!nest_parms)
485 goto nla_put_failure;
f2f3e38c 486 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 487 goto nla_put_failure;
488 nla_nest_end(skb, nest_parms);
c1d10adb 489
cc1eb431
DM		 490 if (nf_ct_zone(ct) &&
491 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
492 goto nla_put_failure;
ef00f89f 493
c1d10adb
PNA		 494 if (ctnetlink_dump_status(skb, ct) < 0 ||
495 ctnetlink_dump_timeout(skb, ct) < 0 ||
4542fa47 496 ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 497 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 498 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
499 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
500 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 501 ctnetlink_dump_secctx(skb, ct) < 0 ||
0ceabd83 502 ctnetlink_dump_labels(skb, ct) < 0 ||
c1d10adb 503 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 504 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 505 ctnetlink_dump_master(skb, ct) < 0 ||
41d73ec0 506 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
df6fb868 507 goto nla_put_failure;
c1d10adb 508
96bcf938 509 nlmsg_end(skb, nlh);
c1d10adb
PNA		 510 return skb->len;
511
512nlmsg_failure:
df6fb868 513nla_put_failure:
96bcf938 514 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 515 return -1;
516}
517
03b64f51
PNA		 518static inline size_t
519ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4
HE		 520{
521 struct nf_conntrack_l3proto *l3proto;
522 struct nf_conntrack_l4proto *l4proto;
03b64f51
PNA		 523 size_t len = 0;
524
525 rcu_read_lock();
526 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
527 len += l3proto->nla_size;
528
529 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
530 len += l4proto->nla_size;
531 rcu_read_unlock();
532
533 return len;
534}
535
d26e6a02 536static inline size_t
f7b13e43 537ctnetlink_acct_size(const struct nf_conn *ct)
d26e6a02
JP		 538{
539 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
540 return 0;
541 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
542 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
543 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
544 ;
545}
546
cba85b53
PNA		 547static inline int
548ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 549{
cba85b53
PNA		 550#ifdef CONFIG_NF_CONNTRACK_SECMARK
551 int len, ret;
1cc63249 552
cba85b53
PNA		 553 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
554 if (ret)
555 return 0;
1cc63249 556
cba85b53
PNA		 557 return nla_total_size(0) /* CTA_SECCTX */
558 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
559#else
560 return 0;
1cc63249 561#endif
cba85b53 562}
1cc63249 563
a992ca2a
PNA		 564static inline size_t
565ctnetlink_timestamp_size(const struct nf_conn *ct)
566{
567#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
568 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
569 return 0;
570 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
571#else
572 return 0;
573#endif
574}
575
03b64f51
PNA		 576static inline size_t
577ctnetlink_nlmsg_size(const struct nf_conn *ct)
578{
579 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
580 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
581 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
582 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
583 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
584 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
585 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
f7b13e43 586 + ctnetlink_acct_size(ct)
a992ca2a 587 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 588 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
589 + nla_total_size(0) /* CTA_PROTOINFO */
590 + nla_total_size(0) /* CTA_HELP */
591 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 592 + ctnetlink_secctx_size(ct)
d271e8bd 593#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 594 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
595 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 596#endif
597#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 598 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 599#endif
600#ifdef CONFIG_NF_CONNTRACK_ZONES
601 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE */
d271e8bd 602#endif
03b64f51 603 + ctnetlink_proto_size(ct)
0ceabd83 604 + ctnetlink_label_size(ct)
03b64f51 605 ;
2732c4e4
HE		 606}
607
8e36c4b5 608#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 609static int
610ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 611{
9592a5c0 612 struct net *net;
c1d10adb
PNA		 613 struct nlmsghdr *nlh;
614 struct nfgenmsg *nfmsg;
df6fb868 615 struct nlattr *nest_parms;
19abb7b0 616 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 617 struct sk_buff *skb;
618 unsigned int type;
c1d10adb 619 unsigned int flags = 0, group;
dd7669a9 620 int err;
c1d10adb
PNA		 621
622 /* ignore our fake conntrack entry */
5bfddbd4 623 if (nf_ct_is_untracked(ct))
e34d5c1a 624 return 0;
c1d10adb 625
a0891aa6 626 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 627 type = IPCTNL_MSG_CT_DELETE;
628 group = NFNLGRP_CONNTRACK_DESTROY;
a0891aa6 629 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 630 type = IPCTNL_MSG_CT_NEW;
631 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 632 group = NFNLGRP_CONNTRACK_NEW;
17e6e4ea 633 } else if (events) {
c1d10adb
PNA		 634 type = IPCTNL_MSG_CT_NEW;
635 group = NFNLGRP_CONNTRACK_UPDATE;
636 } else
e34d5c1a 637 return 0;
a2427692 638
9592a5c0
AD		 639 net = nf_ct_net(ct);
640 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 641 return 0;
a2427692 642
03b64f51
PNA		 643 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
644 if (skb == NULL)
150ace0d 645 goto errout;
c1d10adb 646
c1d10adb 647 type |= NFNL_SUBSYS_CTNETLINK << 8;
15e47304 648 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 649 if (nlh == NULL)
650 goto nlmsg_failure;
c1d10adb 651
96bcf938 652 nfmsg = nlmsg_data(nlh);
5e8fbe2a 653 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 654 nfmsg->version = NFNETLINK_V0;
655 nfmsg->res_id = 0;
656
528a3a6f 657 rcu_read_lock();
df6fb868
PM		 658 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
659 if (!nest_parms)
660 goto nla_put_failure;
f2f3e38c 661 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 662 goto nla_put_failure;
663 nla_nest_end(skb, nest_parms);
601e68e1 664
df6fb868
PM		 665 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
666 if (!nest_parms)
667 goto nla_put_failure;
f2f3e38c 668 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 669 goto nla_put_failure;
670 nla_nest_end(skb, nest_parms);
c1d10adb 671
cc1eb431
DM		 672 if (nf_ct_zone(ct) &&
673 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
674 goto nla_put_failure;
ef00f89f 675
1eedf699
EL		 676 if (ctnetlink_dump_id(skb, ct) < 0)
677 goto nla_put_failure;
678
e57dce60
FH		 679 if (ctnetlink_dump_status(skb, ct) < 0)
680 goto nla_put_failure;
681
a0891aa6 682 if (events & (1 << IPCT_DESTROY)) {
4542fa47 683 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 684 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 685 goto nla_put_failure;
7b621c1e 686 } else {
7b621c1e 687 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 688 goto nla_put_failure;
7b621c1e 689
a0891aa6 690 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 691 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 692 goto nla_put_failure;
7b621c1e 693
a0891aa6 694 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 695 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 696 goto nla_put_failure;
7b621c1e 697
ff660c80 698#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 699 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 700 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 701 goto nla_put_failure;
ff660c80 702#endif
0ceabd83
FW		 703 if (events & (1 << IPCT_LABEL) &&
704 ctnetlink_dump_labels(skb, ct) < 0)
705 goto nla_put_failure;
7b621c1e 706
a0891aa6 707 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 708 ctnetlink_dump_master(skb, ct) < 0)
709 goto nla_put_failure;
710
41d73ec0
PM		 711 if (events & (1 << IPCT_SEQADJ) &&
712 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
13eae15a 713 goto nla_put_failure;
7b621c1e 714 }
b9a37e0c 715
a83099a6 716#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 717 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 718 && ctnetlink_dump_mark(skb, ct) < 0)
719 goto nla_put_failure;
720#endif
528a3a6f 721 rcu_read_unlock();
a83099a6 722
96bcf938 723 nlmsg_end(skb, nlh);
15e47304 724 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 725 GFP_ATOMIC);
dd7669a9
PNA		 726 if (err == -ENOBUFS || err == -EAGAIN)
727 return -ENOBUFS;
728
e34d5c1a 729 return 0;
c1d10adb 730
df6fb868 731nla_put_failure:
528a3a6f 732 rcu_read_unlock();
96bcf938 733 nlmsg_cancel(skb, nlh);
528a3a6f 734nlmsg_failure:
c1d10adb 735 kfree_skb(skb);
150ace0d 736errout:
37b7ef72
PNA		 737 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
738 return -ENOBUFS;
739
e34d5c1a 740 return 0;
c1d10adb
PNA		 741}
742#endif /* CONFIG_NF_CONNTRACK_EVENTS */
743
744static int ctnetlink_done(struct netlink_callback *cb)
745{
89f2e218
PM		 746 if (cb->args[1])
747 nf_ct_put((struct nf_conn *)cb->args[1]);
397304b5 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;
93bb0ceb
JDB		 769 spinlock_t *lockp;
770
0f298a28
PNA		 771#ifdef CONFIG_NF_CONNTRACK_MARK
772 const struct ctnetlink_dump_filter *filter = cb->data;
773#endif
3b988ece 774
d205dc40 775 last = (struct nf_conn *)cb->args[1];
93bb0ceb
JDB		 776
777 local_bh_disable();
9ab99d5a 778 for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) {
89f2e218 779restart:
93bb0ceb
JDB		 780 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
781 spin_lock(lockp);
782 if (cb->args[0] >= net->ct.htable_size) {
783 spin_unlock(lockp);
784 goto out;
785 }
13ee6ac5 786 hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]],
ea781f19 787 hnnode) {
5b1158e9 788 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 789 continue;
790 ct = nf_ct_tuplehash_to_ctrack(h);
87711cb8
PNA		 791 /* Dump entries of a given L3 protocol number.
792 * If it is not specified, ie. l3proto == 0,
793 * then dump everything. */
5e8fbe2a 794 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 795 continue;
d205dc40
PM		 796 if (cb->args[1]) {
797 if (ct != last)
13ee6ac5 798 continue;
d205dc40 799 cb->args[1] = 0;
89f2e218 800 }
0f298a28
PNA		 801#ifdef CONFIG_NF_CONNTRACK_MARK
802 if (filter && !((ct->mark & filter->mark.mask) ==
803 filter->mark.val)) {
804 continue;
805 }
806#endif
3b988ece
HS		 807 rcu_read_lock();
808 res =
15e47304 809 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 810 cb->nlh->nlmsg_seq,
811 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
812 ct);
813 rcu_read_unlock();
814 if (res < 0) {
c71caf41 815 nf_conntrack_get(&ct->ct_general);
89f2e218 816 cb->args[1] = (unsigned long)ct;
93bb0ceb 817 spin_unlock(lockp);
c1d10adb 818 goto out;
89f2e218
PM		 819 }
820 }
93bb0ceb 821 spin_unlock(lockp);
d205dc40 822 if (cb->args[1]) {
89f2e218
PM		 823 cb->args[1] = 0;
824 goto restart;
c1d10adb
PNA		 825 }
826 }
89f2e218 827out:
93bb0ceb 828 local_bh_enable();
d205dc40
PM		 829 if (last)
830 nf_ct_put(last);
c1d10adb 831
c1d10adb
PNA		 832 return skb->len;
833}
834
c1d10adb 835static inline int
df6fb868 836ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
c1d10adb 837{
df6fb868 838 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 839 struct nf_conntrack_l3proto *l3proto;
840 int ret = 0;
841
130ffbc2
DB		 842 ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
843 if (ret < 0)
844 return ret;
c1d10adb 845
cd91566e
FW		 846 rcu_read_lock();
847 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 848
f73e924c
PM		 849 if (likely(l3proto->nlattr_to_tuple)) {
850 ret = nla_validate_nested(attr, CTA_IP_MAX,
851 l3proto->nla_policy);
852 if (ret == 0)
853 ret = l3proto->nlattr_to_tuple(tb, tuple);
854 }
c1d10adb 855
cd91566e 856 rcu_read_unlock();
c1d10adb 857
c1d10adb
PNA		 858 return ret;
859}
860
f73e924c
PM		 861static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
862 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 863};
864
865static inline int
df6fb868 866ctnetlink_parse_tuple_proto(struct nlattr *attr,
c1d10adb
PNA		 867 struct nf_conntrack_tuple *tuple)
868{
df6fb868 869 struct nlattr *tb[CTA_PROTO_MAX+1];
605dcad6 870 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 871 int ret = 0;
872
f73e924c
PM		 873 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
874 if (ret < 0)
875 return ret;
c1d10adb 876
df6fb868 877 if (!tb[CTA_PROTO_NUM])
c1d10adb 878 return -EINVAL;
77236b6e 879 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 880
cd91566e
FW		 881 rcu_read_lock();
882 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 883
f73e924c
PM		 884 if (likely(l4proto->nlattr_to_tuple)) {
885 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
886 l4proto->nla_policy);
887 if (ret == 0)
888 ret = l4proto->nlattr_to_tuple(tb, tuple);
889 }
c1d10adb 890
cd91566e 891 rcu_read_unlock();
601e68e1 892
c1d10adb
PNA		 893 return ret;
894}
895
d0b0268f
PM		 896static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
897 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
898 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
899};
900
bb5cf80e 901static int
39938324
PM		 902ctnetlink_parse_tuple(const struct nlattr * const cda[],
903 struct nf_conntrack_tuple *tuple,
a00f1f36 904 enum ctattr_type type, u_int8_t l3num)
c1d10adb 905{
df6fb868 906 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 907 int err;
908
c1d10adb
PNA		 909 memset(tuple, 0, sizeof(*tuple));
910
130ffbc2
DB		 911 err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
912 if (err < 0)
913 return err;
c1d10adb 914
df6fb868 915 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 916 return -EINVAL;
917
918 tuple->src.l3num = l3num;
919
df6fb868 920 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 921 if (err < 0)
922 return err;
923
df6fb868 924 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 925 return -EINVAL;
926
df6fb868 927 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 928 if (err < 0)
929 return err;
930
931 /* orig and expect tuples get DIR_ORIGINAL */
932 if (type == CTA_TUPLE_REPLY)
933 tuple->dst.dir = IP_CT_DIR_REPLY;
934 else
935 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
936
c1d10adb
PNA		 937 return 0;
938}
939
ef00f89f
PM		 940static int
941ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone)
942{
943 if (attr)
944#ifdef CONFIG_NF_CONNTRACK_ZONES
945 *zone = ntohs(nla_get_be16(attr));
946#else
947 return -EOPNOTSUPP;
948#endif
949 else
950 *zone = 0;
951
952 return 0;
953}
954
d0b0268f 955static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 956 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
957 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 958};
959
c1d10adb 960static inline int
ae243bee
PNA		 961ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
962 struct nlattr **helpinfo)
c1d10adb 963{
130ffbc2 964 int err;
df6fb868 965 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 966
130ffbc2
DB		 967 err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
968 if (err < 0)
969 return err;
c1d10adb 970
df6fb868 971 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 972 return -EINVAL;
973
df6fb868 974 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 975
ae243bee
PNA		 976 if (tb[CTA_HELP_INFO])
977 *helpinfo = tb[CTA_HELP_INFO];
978
c1d10adb
PNA		 979 return 0;
980}
981
f73e924c 982static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 983 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
984 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 985 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 986 [CTA_PROTOINFO] = { .type = NLA_NESTED },
987 [CTA_HELP] = { .type = NLA_NESTED },
988 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 989 [CTA_TIMEOUT] = { .type = NLA_U32 },
990 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 991 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 992 [CTA_NAT_DST] = { .type = NLA_NESTED },
993 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 994 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
995 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 996 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 997 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9 998 [CTA_LABELS] = { .type = NLA_BINARY,
d2bf2f34 999 .len = NF_CT_LABELS_MAX_SIZE },
9b21f6a9 1000 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
d2bf2f34 1001 .len = NF_CT_LABELS_MAX_SIZE },
c1d10adb
PNA		 1002};
1003
1004static int
601e68e1 1005ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1006 const struct nlmsghdr *nlh,
1007 const struct nlattr * const cda[])
c1d10adb 1008{
9592a5c0 1009 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1010 struct nf_conntrack_tuple_hash *h;
1011 struct nf_conntrack_tuple tuple;
1012 struct nf_conn *ct;
96bcf938 1013 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1014 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1015 u16 zone;
1016 int err;
1017
1018 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1019 if (err < 0)
1020 return err;
c1d10adb 1021
df6fb868 1022 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1023 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1024 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1025 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1026 else {
1027 /* Flush the whole table */
9592a5c0 1028 nf_conntrack_flush_report(net,
15e47304 1029 NETLINK_CB(skb).portid,
274d383b 1030 nlmsg_report(nlh));
c1d10adb
PNA		 1031 return 0;
1032 }
1033
1034 if (err < 0)
1035 return err;
1036
ef00f89f 1037 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1038 if (!h)
c1d10adb 1039 return -ENOENT;
c1d10adb
PNA		 1040
1041 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1042
df6fb868 1043 if (cda[CTA_ID]) {
77236b6e 1044 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 1045 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 1046 nf_ct_put(ct);
1047 return -ENOENT;
1048 }
601e68e1 1049 }
c1d10adb 1050
02982c27
FW		 1051 if (del_timer(&ct->timeout))
1052 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh));
1053
c1d10adb 1054 nf_ct_put(ct);
c1d10adb
PNA		 1055
1056 return 0;
1057}
1058
1059static int
601e68e1 1060ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1061 const struct nlmsghdr *nlh,
1062 const struct nlattr * const cda[])
c1d10adb 1063{
9592a5c0 1064 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1065 struct nf_conntrack_tuple_hash *h;
1066 struct nf_conntrack_tuple tuple;
1067 struct nf_conn *ct;
1068 struct sk_buff *skb2 = NULL;
96bcf938 1069 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1070 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1071 u16 zone;
1072 int err;
c1d10adb 1073
80d326fa
PNA		 1074 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1075 struct netlink_dump_control c = {
1076 .dump = ctnetlink_dump_table,
1077 .done = ctnetlink_done,
1078 };
0f298a28
PNA		 1079#ifdef CONFIG_NF_CONNTRACK_MARK
1080 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1081 struct ctnetlink_dump_filter *filter;
1082
1083 filter = kzalloc(sizeof(struct ctnetlink_dump_filter),
1084 GFP_ATOMIC);
1085 if (filter == NULL)
1086 return -ENOMEM;
1087
1088 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
1089 filter->mark.mask =
1090 ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
1091 c.data = filter;
1092 }
1093#endif
80d326fa
PNA		 1094 return netlink_dump_start(ctnl, skb, nlh, &c);
1095 }
c1d10adb 1096
ef00f89f
PM		 1097 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1098 if (err < 0)
1099 return err;
1100
df6fb868 1101 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1102 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1103 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1104 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1105 else
1106 return -EINVAL;
1107
1108 if (err < 0)
1109 return err;
1110
ef00f89f 1111 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1112 if (!h)
c1d10adb 1113 return -ENOENT;
9ea8cfd6 1114
c1d10adb
PNA		 1115 ct = nf_ct_tuplehash_to_ctrack(h);
1116
1117 err = -ENOMEM;
96bcf938
PNA		 1118 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1119 if (skb2 == NULL) {
c1d10adb
PNA		 1120 nf_ct_put(ct);
1121 return -ENOMEM;
1122 }
c1d10adb 1123
528a3a6f 1124 rcu_read_lock();
15e47304 1125 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
80e60e67 1126 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1127 rcu_read_unlock();
c1d10adb
PNA		 1128 nf_ct_put(ct);
1129 if (err <= 0)
1130 goto free;
1131
15e47304 1132 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
c1d10adb
PNA		 1133 if (err < 0)
1134 goto out;
1135
c1d10adb
PNA		 1136 return 0;
1137
1138free:
1139 kfree_skb(skb2);
1140out:
f31e8d49
PNA		 1141 /* this avoids a loop in nfnetlink. */
1142 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1143}
1144
d871befe
PNA		 1145static int ctnetlink_done_list(struct netlink_callback *cb)
1146{
1147 if (cb->args[1])
1148 nf_ct_put((struct nf_conn *)cb->args[1]);
1149 return 0;
1150}
1151
1152static int
b7779d06 1153ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
d871befe 1154{
cd5f336f 1155 struct nf_conn *ct, *last;
d871befe
PNA		 1156 struct nf_conntrack_tuple_hash *h;
1157 struct hlist_nulls_node *n;
1158 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1159 u_int8_t l3proto = nfmsg->nfgen_family;
1160 int res;
b7779d06
JDB		 1161 int cpu;
1162 struct hlist_nulls_head *list;
1163 struct net *net = sock_net(skb->sk);
d871befe
PNA		 1164
1165 if (cb->args[2])
1166 return 0;
1167
cd5f336f
FW		 1168 last = (struct nf_conn *)cb->args[1];
1169
b7779d06
JDB		 1170 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1171 struct ct_pcpu *pcpu;
1172
1173 if (!cpu_possible(cpu))
d871befe 1174 continue;
b7779d06
JDB		 1175
1176 pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
1177 spin_lock_bh(&pcpu->lock);
b7779d06
JDB		 1178 list = dying ? &pcpu->dying : &pcpu->unconfirmed;
1179restart:
1180 hlist_nulls_for_each_entry(h, n, list, hnnode) {
1181 ct = nf_ct_tuplehash_to_ctrack(h);
1182 if (l3proto && nf_ct_l3num(ct) != l3proto)
d871befe 1183 continue;
b7779d06
JDB		 1184 if (cb->args[1]) {
1185 if (ct != last)
1186 continue;
1187 cb->args[1] = 0;
1188 }
1189 rcu_read_lock();
1190 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1191 cb->nlh->nlmsg_seq,
1192 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1193 ct);
1194 rcu_read_unlock();
1195 if (res < 0) {
cd5f336f
FW		 1196 if (!atomic_inc_not_zero(&ct->ct_general.use))
1197 continue;
266155b2 1198 cb->args[0] = cpu;
b7779d06
JDB		 1199 cb->args[1] = (unsigned long)ct;
1200 spin_unlock_bh(&pcpu->lock);
1201 goto out;
1202 }
d871befe 1203 }
b7779d06
JDB		 1204 if (cb->args[1]) {
1205 cb->args[1] = 0;
1206 goto restart;
266155b2 1207 }
b7779d06 1208 spin_unlock_bh(&pcpu->lock);
d871befe 1209 }
266155b2 1210 cb->args[2] = 1;
d871befe 1211out:
d871befe
PNA		 1212 if (last)
1213 nf_ct_put(last);
1214
1215 return skb->len;
1216}
1217
1218static int
1219ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1220{
b7779d06 1221 return ctnetlink_dump_list(skb, cb, true);
d871befe
PNA		 1222}
1223
1224static int
1225ctnetlink_get_ct_dying(struct sock *ctnl, struct sk_buff *skb,
1226 const struct nlmsghdr *nlh,
1227 const struct nlattr * const cda[])
1228{
1229 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1230 struct netlink_dump_control c = {
1231 .dump = ctnetlink_dump_dying,
1232 .done = ctnetlink_done_list,
1233 };
1234 return netlink_dump_start(ctnl, skb, nlh, &c);
1235 }
1236
1237 return -EOPNOTSUPP;
1238}
1239
1240static int
1241ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1242{
b7779d06 1243 return ctnetlink_dump_list(skb, cb, false);
d871befe
PNA		 1244}
1245
1246static int
1247ctnetlink_get_ct_unconfirmed(struct sock *ctnl, struct sk_buff *skb,
1248 const struct nlmsghdr *nlh,
1249 const struct nlattr * const cda[])
1250{
1251 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1252 struct netlink_dump_control c = {
1253 .dump = ctnetlink_dump_unconfirmed,
1254 .done = ctnetlink_done_list,
1255 };
1256 return netlink_dump_start(ctnl, skb, nlh, &c);
1257 }
1258
1259 return -EOPNOTSUPP;
1260}
1261
67671841 1262#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1263static int
1264ctnetlink_parse_nat_setup(struct nf_conn *ct,
1265 enum nf_nat_manip_type manip,
39938324 1266 const struct nlattr *attr)
e6a7d3c0
PNA		 1267{
1268 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
c7232c99 1269 int err;
e6a7d3c0
PNA		 1270
1271 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1272 if (!parse_nat_setup) {
95a5afca 1273#ifdef CONFIG_MODULES
e6a7d3c0 1274 rcu_read_unlock();
c14b78e7 1275 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1276 if (request_module("nf-nat") < 0) {
c14b78e7 1277 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1278 rcu_read_lock();
1279 return -EOPNOTSUPP;
1280 }
c14b78e7 1281 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1282 rcu_read_lock();
1283 if (nfnetlink_parse_nat_setup_hook)
1284 return -EAGAIN;
1285#endif
1286 return -EOPNOTSUPP;
1287 }
1288
c7232c99
PM		 1289 err = parse_nat_setup(ct, manip, attr);
1290 if (err == -EAGAIN) {
1291#ifdef CONFIG_MODULES
1292 rcu_read_unlock();
c14b78e7 1293 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1294 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1295 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1296 rcu_read_lock();
1297 return -EOPNOTSUPP;
1298 }
c14b78e7 1299 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1300 rcu_read_lock();
1301#else
1302 err = -EOPNOTSUPP;
1303#endif
1304 }
1305 return err;
e6a7d3c0 1306}
67671841 1307#endif
e6a7d3c0 1308
bb5cf80e 1309static int
39938324 1310ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1311{
1312 unsigned long d;
77236b6e 1313 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1314 d = ct->status ^ status;
1315
1316 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1317 /* unchangeable */
0adf9d67 1318 return -EBUSY;
601e68e1 1319
c1d10adb
PNA		 1320 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1321 /* SEEN_REPLY bit can only be set */
0adf9d67 1322 return -EBUSY;
601e68e1 1323
c1d10adb
PNA		 1324 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1325 /* ASSURED bit can only be set */
0adf9d67 1326 return -EBUSY;
c1d10adb 1327
c1d10adb
PNA		 1328 /* Be careful here, modifying NAT bits can screw up things,
1329 * so don't let users modify them directly if they don't pass
5b1158e9 1330 * nf_nat_range. */
c1d10adb
PNA		 1331 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1332 return 0;
1333}
1334
e6a7d3c0 1335static int
0eba801b 1336ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1337{
1338#ifdef CONFIG_NF_NAT_NEEDED
1339 int ret;
1340
fe337ac2
FW		 1341 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1342 return 0;
1343
0eba801b
PNA		 1344 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1345 cda[CTA_NAT_DST]);
1346 if (ret < 0)
1347 return ret;
1348
1349 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1350 cda[CTA_NAT_SRC]);
1351 return ret;
e6a7d3c0 1352#else
0eba801b
PNA		 1353 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1354 return 0;
e6a7d3c0
PNA		 1355 return -EOPNOTSUPP;
1356#endif
1357}
c1d10adb
PNA		 1358
1359static inline int
39938324 1360ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1361{
1362 struct nf_conntrack_helper *helper;
dc808fe2 1363 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1364 char *helpname = NULL;
ae243bee 1365 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1366 int err;
1367
c1d10adb
PNA		 1368 /* don't change helper of sibling connections */
1369 if (ct->master)
0adf9d67 1370 return -EBUSY;
c1d10adb 1371
ae243bee 1372 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1373 if (err < 0)
1374 return err;
1375
df293bbb
YK		 1376 if (!strcmp(helpname, "")) {
1377 if (help && help->helper) {
c1d10adb
PNA		 1378 /* we had a helper before ... */
1379 nf_ct_remove_expectations(ct);
a9b3cd7f 1380 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1381 }
df293bbb
YK		 1382
1383 return 0;
c1d10adb 1384 }
601e68e1 1385
794e6871
PM		 1386 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1387 nf_ct_protonum(ct));
226c0c0e
PNA		 1388 if (helper == NULL) {
1389#ifdef CONFIG_MODULES
ca7433df 1390 spin_unlock_bh(&nf_conntrack_expect_lock);
226c0c0e
PNA		 1391
1392 if (request_module("nfct-helper-%s", helpname) < 0) {
ca7433df 1393 spin_lock_bh(&nf_conntrack_expect_lock);
226c0c0e
PNA		 1394 return -EOPNOTSUPP;
1395 }
1396
ca7433df 1397 spin_lock_bh(&nf_conntrack_expect_lock);
794e6871
PM		 1398 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1399 nf_ct_protonum(ct));
226c0c0e
PNA		 1400 if (helper)
1401 return -EAGAIN;
1402#endif
0adf9d67 1403 return -EOPNOTSUPP;
226c0c0e 1404 }
df293bbb 1405
ceceae1b 1406 if (help) {
ae243bee
PNA		 1407 if (help->helper == helper) {
1408 /* update private helper data if allowed. */
7be54ca4 1409 if (helper->from_nlattr)
ae243bee 1410 helper->from_nlattr(helpinfo, ct);
ceceae1b 1411 return 0;
fd7462de 1412 } else
ceceae1b 1413 return -EBUSY;
ceceae1b 1414 }
df293bbb 1415
fd7462de
PNA		 1416 /* we cannot set a helper for an existing conntrack */
1417 return -EOPNOTSUPP;
c1d10adb
PNA		 1418}
1419
1420static inline int
39938324 1421ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1422{
77236b6e 1423 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
601e68e1 1424
c1d10adb
PNA		 1425 if (!del_timer(&ct->timeout))
1426 return -ETIME;
1427
1428 ct->timeout.expires = jiffies + timeout * HZ;
1429 add_timer(&ct->timeout);
1430
1431 return 0;
1432}
1433
d0b0268f
PM		 1434static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1435 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1436 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1437 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1438};
1439
c1d10adb 1440static inline int
39938324 1441ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1442{
39938324
PM		 1443 const struct nlattr *attr = cda[CTA_PROTOINFO];
1444 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
605dcad6 1445 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 1446 int err = 0;
1447
130ffbc2
DB		 1448 err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
1449 if (err < 0)
1450 return err;
c1d10adb 1451
cd91566e
FW		 1452 rcu_read_lock();
1453 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1454 if (l4proto->from_nlattr)
1455 err = l4proto->from_nlattr(tb, ct);
cd91566e 1456 rcu_read_unlock();
c1d10adb
PNA		 1457
1458 return err;
1459}
1460
41d73ec0
PM		 1461static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = {
1462 [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 },
1463 [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 },
1464 [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 },
d0b0268f
PM		 1465};
1466
13eae15a 1467static inline int
41d73ec0 1468change_seq_adj(struct nf_ct_seqadj *seq, const struct nlattr * const attr)
13eae15a 1469{
130ffbc2 1470 int err;
41d73ec0 1471 struct nlattr *cda[CTA_SEQADJ_MAX+1];
13eae15a 1472
41d73ec0 1473 err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy);
130ffbc2
DB		 1474 if (err < 0)
1475 return err;
13eae15a 1476
41d73ec0 1477 if (!cda[CTA_SEQADJ_CORRECTION_POS])
13eae15a
PNA		 1478 return -EINVAL;
1479
41d73ec0
PM		 1480 seq->correction_pos =
1481 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
13eae15a 1482
41d73ec0 1483 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
13eae15a
PNA		 1484 return -EINVAL;
1485
41d73ec0
PM		 1486 seq->offset_before =
1487 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
13eae15a 1488
41d73ec0 1489 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
13eae15a
PNA		 1490 return -EINVAL;
1491
41d73ec0
PM		 1492 seq->offset_after =
1493 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
13eae15a
PNA		 1494
1495 return 0;
1496}
1497
1498static int
41d73ec0
PM		 1499ctnetlink_change_seq_adj(struct nf_conn *ct,
1500 const struct nlattr * const cda[])
13eae15a 1501{
41d73ec0 1502 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
13eae15a 1503 int ret = 0;
13eae15a 1504
41d73ec0 1505 if (!seqadj)
13eae15a
PNA		 1506 return 0;
1507
41d73ec0
PM		 1508 if (cda[CTA_SEQ_ADJ_ORIG]) {
1509 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
1510 cda[CTA_SEQ_ADJ_ORIG]);
13eae15a
PNA		 1511 if (ret < 0)
1512 return ret;
1513
1514 ct->status |= IPS_SEQ_ADJUST;
1515 }
1516
41d73ec0
PM		 1517 if (cda[CTA_SEQ_ADJ_REPLY]) {
1518 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
1519 cda[CTA_SEQ_ADJ_REPLY]);
13eae15a
PNA		 1520 if (ret < 0)
1521 return ret;
1522
1523 ct->status |= IPS_SEQ_ADJUST;
1524 }
1525
1526 return 0;
1527}
13eae15a 1528
9b21f6a9
FW		 1529static int
1530ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1531{
1532#ifdef CONFIG_NF_CONNTRACK_LABELS
1533 size_t len = nla_len(cda[CTA_LABELS]);
1534 const void *mask = cda[CTA_LABELS_MASK];
1535
1536 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1537 return -EINVAL;
1538
1539 if (mask) {
1540 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1541 nla_len(cda[CTA_LABELS_MASK]) != len)
1542 return -EINVAL;
1543 mask = nla_data(cda[CTA_LABELS_MASK]);
1544 }
1545
1546 len /= sizeof(u32);
1547
1548 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1549#else
1550 return -EOPNOTSUPP;
1551#endif
1552}
1553
c1d10adb 1554static int
39938324
PM		 1555ctnetlink_change_conntrack(struct nf_conn *ct,
1556 const struct nlattr * const cda[])
c1d10adb
PNA		 1557{
1558 int err;
1559
e098360f
PNA		 1560 /* only allow NAT changes and master assignation for new conntracks */
1561 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1562 return -EOPNOTSUPP;
1563
df6fb868 1564 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1565 err = ctnetlink_change_helper(ct, cda);
1566 if (err < 0)
1567 return err;
1568 }
1569
df6fb868 1570 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1571 err = ctnetlink_change_timeout(ct, cda);
1572 if (err < 0)
1573 return err;
1574 }
1575
df6fb868 1576 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1577 err = ctnetlink_change_status(ct, cda);
1578 if (err < 0)
1579 return err;
1580 }
1581
df6fb868 1582 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1583 err = ctnetlink_change_protoinfo(ct, cda);
1584 if (err < 0)
1585 return err;
1586 }
1587
bcd1e830 1588#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1589 if (cda[CTA_MARK])
77236b6e 1590 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1591#endif
1592
41d73ec0
PM		 1593 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1594 err = ctnetlink_change_seq_adj(ct, cda);
13eae15a
PNA		 1595 if (err < 0)
1596 return err;
1597 }
41d73ec0 1598
9b21f6a9
FW		 1599 if (cda[CTA_LABELS]) {
1600 err = ctnetlink_attach_labels(ct, cda);
1601 if (err < 0)
1602 return err;
1603 }
13eae15a 1604
c1d10adb
PNA		 1605 return 0;
1606}
1607
f0a3c086 1608static struct nf_conn *
ef00f89f 1609ctnetlink_create_conntrack(struct net *net, u16 zone,
9592a5c0 1610 const struct nlattr * const cda[],
c1d10adb 1611 struct nf_conntrack_tuple *otuple,
5faa1f4c 1612 struct nf_conntrack_tuple *rtuple,
7ec47496 1613 u8 u3)
c1d10adb
PNA		 1614{
1615 struct nf_conn *ct;
1616 int err = -EINVAL;
ceceae1b 1617 struct nf_conntrack_helper *helper;
315c34da 1618 struct nf_conn_tstamp *tstamp;
c1d10adb 1619
ef00f89f 1620 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1621 if (IS_ERR(ct))
f0a3c086 1622 return ERR_PTR(-ENOMEM);
c1d10adb 1623
df6fb868 1624 if (!cda[CTA_TIMEOUT])
0f5b3e85 1625 goto err1;
77236b6e 1626 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
c1d10adb
PNA		 1627
1628 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
c1d10adb 1629
1575e7ea 1630 rcu_read_lock();
226c0c0e 1631 if (cda[CTA_HELP]) {
29fe1b48 1632 char *helpname = NULL;
ae243bee
PNA		 1633 struct nlattr *helpinfo = NULL;
1634
1635 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1636 if (err < 0)
1637 goto err2;
226c0c0e 1638
794e6871
PM		 1639 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1640 nf_ct_protonum(ct));
226c0c0e
PNA		 1641 if (helper == NULL) {
1642 rcu_read_unlock();
1643#ifdef CONFIG_MODULES
1644 if (request_module("nfct-helper-%s", helpname) < 0) {
1645 err = -EOPNOTSUPP;
0f5b3e85 1646 goto err1;
226c0c0e
PNA		 1647 }
1648
1649 rcu_read_lock();
794e6871
PM		 1650 helper = __nf_conntrack_helper_find(helpname,
1651 nf_ct_l3num(ct),
1652 nf_ct_protonum(ct));
226c0c0e 1653 if (helper) {
226c0c0e 1654 err = -EAGAIN;
0f5b3e85 1655 goto err2;
226c0c0e
PNA		 1656 }
1657 rcu_read_unlock();
1658#endif
1659 err = -EOPNOTSUPP;
0f5b3e85 1660 goto err1;
226c0c0e
PNA		 1661 } else {
1662 struct nf_conn_help *help;
1663
1afc5679 1664 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1665 if (help == NULL) {
226c0c0e 1666 err = -ENOMEM;
0f5b3e85 1667 goto err2;
226c0c0e 1668 }
ae243bee 1669 /* set private helper data if allowed. */
7be54ca4 1670 if (helper->from_nlattr)
ae243bee 1671 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1672
1673 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1674 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1675 }
1676 } else {
1677 /* try an implicit helper assignation */
b2a15a60 1678 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1679 if (err < 0)
1680 goto err2;
1575e7ea
PNA		 1681 }
1682
0eba801b
PNA		 1683 err = ctnetlink_setup_nat(ct, cda);
1684 if (err < 0)
1685 goto err2;
e6a7d3c0 1686
a88e22ad 1687 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1688 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 1689 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017
FW		 1690 nf_ct_labels_ext_add(ct);
1691
a88e22ad
PNA		 1692 /* we must add conntrack extensions before confirmation. */
1693 ct->status |= IPS_CONFIRMED;
1694
1695 if (cda[CTA_STATUS]) {
1696 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1697 if (err < 0)
1698 goto err2;
bbb3357d 1699 }
c1d10adb 1700
41d73ec0
PM		 1701 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1702 err = ctnetlink_change_seq_adj(ct, cda);
0f5b3e85
PM		 1703 if (err < 0)
1704 goto err2;
c969aa7d 1705 }
c969aa7d 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) |
41d73ec0 1819 (1 << IPCT_SEQADJ) |
a0891aa6 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)) {
ca7433df 1833 spin_lock_bh(&nf_conntrack_expect_lock);
19abb7b0 1834 err = ctnetlink_change_conntrack(ct, cda);
ca7433df 1835 spin_unlock_bh(&nf_conntrack_expect_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 1841 (1 << IPCT_PROTOINFO) |
41d73ec0 1842 (1 << IPCT_SEQADJ) |
a0891aa6 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
bd077937
PNA		 2002static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2003 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2004 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2005 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2006 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2007 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2008 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2009 .len = NF_CT_HELPER_NAME_LEN - 1 },
2010 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2011 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2012 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2013 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2014 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2015};
2016
2017static struct nf_conntrack_expect *
2018ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2019 struct nf_conntrack_helper *helper,
2020 struct nf_conntrack_tuple *tuple,
2021 struct nf_conntrack_tuple *mask);
2022
7c622345 2023#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 2024static size_t
2025ctnetlink_nfqueue_build_size(const struct nf_conn *ct)
2026{
2027 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2028 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2029 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2030 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2031 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2032 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2033 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2034 + nla_total_size(0) /* CTA_PROTOINFO */
2035 + nla_total_size(0) /* CTA_HELP */
2036 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2037 + ctnetlink_secctx_size(ct)
2038#ifdef CONFIG_NF_NAT_NEEDED
2039 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2040 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2041#endif
2042#ifdef CONFIG_NF_CONNTRACK_MARK
2043 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 2044#endif
2045#ifdef CONFIG_NF_CONNTRACK_ZONES
2046 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE */
9cb01766
PNA		 2047#endif
2048 + ctnetlink_proto_size(ct)
2049 ;
2050}
2051
2052static int
2053ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
2054{
2055 struct nlattr *nest_parms;
2056
2057 rcu_read_lock();
2058 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2059 if (!nest_parms)
2060 goto nla_put_failure;
2061 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2062 goto nla_put_failure;
2063 nla_nest_end(skb, nest_parms);
2064
2065 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2066 if (!nest_parms)
2067 goto nla_put_failure;
2068 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2069 goto nla_put_failure;
2070 nla_nest_end(skb, nest_parms);
2071
2072 if (nf_ct_zone(ct)) {
2073 if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
2074 goto nla_put_failure;
2075 }
2076
2077 if (ctnetlink_dump_id(skb, ct) < 0)
2078 goto nla_put_failure;
2079
2080 if (ctnetlink_dump_status(skb, ct) < 0)
2081 goto nla_put_failure;
2082
2083 if (ctnetlink_dump_timeout(skb, ct) < 0)
2084 goto nla_put_failure;
2085
2086 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2087 goto nla_put_failure;
2088
2089 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2090 goto nla_put_failure;
2091
2092#ifdef CONFIG_NF_CONNTRACK_SECMARK
2093 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2094 goto nla_put_failure;
2095#endif
2096 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2097 goto nla_put_failure;
2098
2099 if ((ct->status & IPS_SEQ_ADJUST) &&
41d73ec0 2100 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
9cb01766
PNA		 2101 goto nla_put_failure;
2102
2103#ifdef CONFIG_NF_CONNTRACK_MARK
2104 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2105 goto nla_put_failure;
2106#endif
0ceabd83
FW		 2107 if (ctnetlink_dump_labels(skb, ct) < 0)
2108 goto nla_put_failure;
9cb01766
PNA		 2109 rcu_read_unlock();
2110 return 0;
2111
2112nla_put_failure:
2113 rcu_read_unlock();
2114 return -ENOSPC;
2115}
2116
2117static int
2118ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
2119{
2120 int err;
2121
2122 if (cda[CTA_TIMEOUT]) {
2123 err = ctnetlink_change_timeout(ct, cda);
2124 if (err < 0)
2125 return err;
2126 }
2127 if (cda[CTA_STATUS]) {
2128 err = ctnetlink_change_status(ct, cda);
2129 if (err < 0)
2130 return err;
2131 }
2132 if (cda[CTA_HELP]) {
2133 err = ctnetlink_change_helper(ct, cda);
2134 if (err < 0)
2135 return err;
2136 }
9b21f6a9
FW		 2137 if (cda[CTA_LABELS]) {
2138 err = ctnetlink_attach_labels(ct, cda);
2139 if (err < 0)
2140 return err;
2141 }
9cb01766 2142#if defined(CONFIG_NF_CONNTRACK_MARK)
534473c6
FW		 2143 if (cda[CTA_MARK]) {
2144 u32 mask = 0, mark, newmark;
2145 if (cda[CTA_MARK_MASK])
2146 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2147
2148 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2149 newmark = (ct->mark & mask) ^ mark;
2150 if (newmark != ct->mark)
2151 ct->mark = newmark;
2152 }
9cb01766
PNA		 2153#endif
2154 return 0;
2155}
2156
2157static int
2158ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct)
2159{
2160 struct nlattr *cda[CTA_MAX+1];
68e035c9 2161 int ret;
9cb01766 2162
130ffbc2
DB		 2163 ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
2164 if (ret < 0)
2165 return ret;
9cb01766 2166
ca7433df 2167 spin_lock_bh(&nf_conntrack_expect_lock);
68e035c9 2168 ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct);
ca7433df 2169 spin_unlock_bh(&nf_conntrack_expect_lock);
68e035c9
PNA		 2170
2171 return ret;
9cb01766
PNA		 2172}
2173
bd077937
PNA		 2174static int ctnetlink_nfqueue_exp_parse(const struct nlattr * const *cda,
2175 const struct nf_conn *ct,
2176 struct nf_conntrack_tuple *tuple,
2177 struct nf_conntrack_tuple *mask)
2178{
2179 int err;
2180
2181 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
2182 nf_ct_l3num(ct));
2183 if (err < 0)
2184 return err;
2185
2186 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
2187 nf_ct_l3num(ct));
2188}
2189
2190static int
2191ctnetlink_nfqueue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2192 u32 portid, u32 report)
2193{
2194 struct nlattr *cda[CTA_EXPECT_MAX+1];
2195 struct nf_conntrack_tuple tuple, mask;
b7e092c0 2196 struct nf_conntrack_helper *helper = NULL;
bd077937
PNA		 2197 struct nf_conntrack_expect *exp;
2198 int err;
2199
2200 err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy);
2201 if (err < 0)
2202 return err;
2203
2204 err = ctnetlink_nfqueue_exp_parse((const struct nlattr * const *)cda,
2205 ct, &tuple, &mask);
2206 if (err < 0)
2207 return err;
2208
2209 if (cda[CTA_EXPECT_HELP_NAME]) {
2210 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2211
2212 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2213 nf_ct_protonum(ct));
2214 if (helper == NULL)
2215 return -EOPNOTSUPP;
2216 }
2217
2218 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2219 helper, &tuple, &mask);
2220 if (IS_ERR(exp))
2221 return PTR_ERR(exp);
2222
2223 err = nf_ct_expect_related_report(exp, portid, report);
2224 if (err < 0) {
2225 nf_ct_expect_put(exp);
2226 return err;
2227 }
2228
2229 return 0;
2230}
2231
9cb01766
PNA		 2232static struct nfq_ct_hook ctnetlink_nfqueue_hook = {
2233 .build_size = ctnetlink_nfqueue_build_size,
2234 .build = ctnetlink_nfqueue_build,
2235 .parse = ctnetlink_nfqueue_parse,
bd077937 2236 .attach_expect = ctnetlink_nfqueue_attach_expect,
41d73ec0 2237 .seq_adjust = nf_ct_tcp_seqadj_set,
9cb01766 2238};
7c622345 2239#endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
9cb01766 2240
601e68e1
YH		 2241/***********************************************************************
2242 * EXPECT
2243 ***********************************************************************/
c1d10adb
PNA		 2244
2245static inline int
2246ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2247 const struct nf_conntrack_tuple *tuple,
2248 enum ctattr_expect type)
2249{
df6fb868 2250 struct nlattr *nest_parms;
601e68e1 2251
df6fb868
PM		 2252 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2253 if (!nest_parms)
2254 goto nla_put_failure;
c1d10adb 2255 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2256 goto nla_put_failure;
2257 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2258
2259 return 0;
2260
df6fb868 2261nla_put_failure:
c1d10adb 2262 return -1;
601e68e1 2263}
c1d10adb 2264
1cde6436
PNA		 2265static inline int
2266ctnetlink_exp_dump_mask(struct sk_buff *skb,
2267 const struct nf_conntrack_tuple *tuple,
d4156e8c 2268 const struct nf_conntrack_tuple_mask *mask)
1cde6436
PNA		 2269{
2270 int ret;
2271 struct nf_conntrack_l3proto *l3proto;
605dcad6 2272 struct nf_conntrack_l4proto *l4proto;
d4156e8c 2273 struct nf_conntrack_tuple m;
df6fb868 2274 struct nlattr *nest_parms;
d4156e8c
PM		 2275
2276 memset(&m, 0xFF, sizeof(m));
d4156e8c 2277 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 2278 m.src.u.all = mask->src.u.all;
2279 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2280
df6fb868
PM		 2281 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2282 if (!nest_parms)
2283 goto nla_put_failure;
1cde6436 2284
3b988ece 2285 rcu_read_lock();
528a3a6f 2286 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 2287 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 2288 if (ret >= 0) {
2289 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2290 tuple->dst.protonum);
d4156e8c 2291 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2292 }
2293 rcu_read_unlock();
2294
1cde6436 2295 if (unlikely(ret < 0))
df6fb868 2296 goto nla_put_failure;
1cde6436 2297
df6fb868 2298 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2299
2300 return 0;
2301
df6fb868 2302nla_put_failure:
1cde6436
PNA		 2303 return -1;
2304}
2305
c7232c99
PM		 2306static const union nf_inet_addr any_addr;
2307
bb5cf80e 2308static int
c1d10adb 2309ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2310 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2311{
2312 struct nf_conn *master = exp->master;
c1216382 2313 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 2314 struct nf_conn_help *help;
076a0ca0
PNA		 2315#ifdef CONFIG_NF_NAT_NEEDED
2316 struct nlattr *nest_parms;
2317 struct nf_conntrack_tuple nat_tuple = {};
2318#endif
544d5c7d
PNA		 2319 struct nf_ct_helper_expectfn *expfn;
2320
d978e5da
PM		 2321 if (timeout < 0)
2322 timeout = 0;
c1d10adb
PNA		 2323
2324 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 2325 goto nla_put_failure;
1cde6436 2326 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 2327 goto nla_put_failure;
c1d10adb
PNA		 2328 if (ctnetlink_exp_dump_tuple(skb,
2329 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2330 CTA_EXPECT_MASTER) < 0)
df6fb868 2331 goto nla_put_failure;
601e68e1 2332
076a0ca0 2333#ifdef CONFIG_NF_NAT_NEEDED
c7232c99
PM		 2334 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2335 exp->saved_proto.all) {
076a0ca0
PNA		 2336 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2337 if (!nest_parms)
2338 goto nla_put_failure;
2339
cc1eb431
DM		 2340 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2341 goto nla_put_failure;
076a0ca0
PNA		 2342
2343 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 2344 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 2345 nat_tuple.dst.protonum = nf_ct_protonum(master);
2346 nat_tuple.src.u = exp->saved_proto;
2347
2348 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2349 CTA_EXPECT_NAT_TUPLE) < 0)
2350 goto nla_put_failure;
2351 nla_nest_end(skb, nest_parms);
2352 }
2353#endif
cc1eb431
DM		 2354 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2355 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2356 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2357 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2358 goto nla_put_failure;
bc01befd
PNA		 2359 help = nfct_help(master);
2360 if (help) {
2361 struct nf_conntrack_helper *helper;
2362
2363 helper = rcu_dereference(help->helper);
cc1eb431
DM		 2364 if (helper &&
2365 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2366 goto nla_put_failure;
bc01befd 2367 }
544d5c7d 2368 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 2369 if (expfn != NULL &&
2370 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2371 goto nla_put_failure;
c1d10adb
PNA		 2372
2373 return 0;
601e68e1 2374
df6fb868 2375nla_put_failure:
c1d10adb
PNA		 2376 return -1;
2377}
2378
2379static int
15e47304 2380ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 2381 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2382{
2383 struct nlmsghdr *nlh;
2384 struct nfgenmsg *nfmsg;
15e47304 2385 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb
PNA		 2386
2387 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2388 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 2389 if (nlh == NULL)
2390 goto nlmsg_failure;
c1d10adb 2391
96bcf938 2392 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2393 nfmsg->nfgen_family = exp->tuple.src.l3num;
2394 nfmsg->version = NFNETLINK_V0;
2395 nfmsg->res_id = 0;
2396
2397 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2398 goto nla_put_failure;
c1d10adb 2399
96bcf938 2400 nlmsg_end(skb, nlh);
c1d10adb
PNA		 2401 return skb->len;
2402
2403nlmsg_failure:
df6fb868 2404nla_put_failure:
96bcf938 2405 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 2406 return -1;
2407}
2408
2409#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2410static int
2411ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 2412{
9592a5c0
AD		 2413 struct nf_conntrack_expect *exp = item->exp;
2414 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 2415 struct nlmsghdr *nlh;
2416 struct nfgenmsg *nfmsg;
c1d10adb 2417 struct sk_buff *skb;
ebbf41df 2418 unsigned int type, group;
c1d10adb
PNA		 2419 int flags = 0;
2420
ebbf41df
PNA		 2421 if (events & (1 << IPEXP_DESTROY)) {
2422 type = IPCTNL_MSG_EXP_DELETE;
2423 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2424 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 2425 type = IPCTNL_MSG_EXP_NEW;
2426 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 2427 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 2428 } else
e34d5c1a 2429 return 0;
c1d10adb 2430
ebbf41df 2431 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 2432 return 0;
b3a27bfb 2433
96bcf938
PNA		 2434 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2435 if (skb == NULL)
150ace0d 2436 goto errout;
c1d10adb 2437
b633ad5f 2438 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2439 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 2440 if (nlh == NULL)
2441 goto nlmsg_failure;
c1d10adb 2442
96bcf938 2443 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2444 nfmsg->nfgen_family = exp->tuple.src.l3num;
2445 nfmsg->version = NFNETLINK_V0;
2446 nfmsg->res_id = 0;
2447
528a3a6f 2448 rcu_read_lock();
c1d10adb 2449 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2450 goto nla_put_failure;
528a3a6f 2451 rcu_read_unlock();
c1d10adb 2452
96bcf938 2453 nlmsg_end(skb, nlh);
15e47304 2454 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 2455 return 0;
c1d10adb 2456
df6fb868 2457nla_put_failure:
528a3a6f 2458 rcu_read_unlock();
96bcf938 2459 nlmsg_cancel(skb, nlh);
528a3a6f 2460nlmsg_failure:
c1d10adb 2461 kfree_skb(skb);
150ace0d 2462errout:
9592a5c0 2463 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 2464 return 0;
c1d10adb
PNA		 2465}
2466#endif
cf6994c2
PM		 2467static int ctnetlink_exp_done(struct netlink_callback *cb)
2468{
31f15875
PM		 2469 if (cb->args[1])
2470 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2471 return 0;
2472}
c1d10adb
PNA		 2473
2474static int
2475ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2476{
9592a5c0 2477 struct net *net = sock_net(skb->sk);
cf6994c2 2478 struct nf_conntrack_expect *exp, *last;
96bcf938 2479 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 2480 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2481
7d0742da 2482 rcu_read_lock();
31f15875
PM		 2483 last = (struct nf_conntrack_expect *)cb->args[1];
2484 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2485restart:
b67bfe0d 2486 hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]],
31f15875
PM		 2487 hnode) {
2488 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2489 continue;
31f15875
PM		 2490 if (cb->args[1]) {
2491 if (exp != last)
2492 continue;
2493 cb->args[1] = 0;
2494 }
8b0a231d 2495 if (ctnetlink_exp_fill_info(skb,
15e47304 2496 NETLINK_CB(cb->skb).portid,
31f15875
PM		 2497 cb->nlh->nlmsg_seq,
2498 IPCTNL_MSG_EXP_NEW,
8b0a231d 2499 exp) < 0) {
7d0742da
PM		 2500 if (!atomic_inc_not_zero(&exp->use))
2501 continue;
31f15875
PM		 2502 cb->args[1] = (unsigned long)exp;
2503 goto out;
2504 }
cf6994c2 2505 }
31f15875
PM		 2506 if (cb->args[1]) {
2507 cb->args[1] = 0;
2508 goto restart;
cf6994c2
PM		 2509 }
2510 }
601e68e1 2511out:
7d0742da 2512 rcu_read_unlock();
cf6994c2
PM		 2513 if (last)
2514 nf_ct_expect_put(last);
c1d10adb 2515
c1d10adb
PNA		 2516 return skb->len;
2517}
2518
e844a928
PNA		 2519static int
2520ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2521{
2522 struct nf_conntrack_expect *exp, *last;
2523 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2524 struct nf_conn *ct = cb->data;
2525 struct nf_conn_help *help = nfct_help(ct);
2526 u_int8_t l3proto = nfmsg->nfgen_family;
2527
2528 if (cb->args[0])
2529 return 0;
2530
2531 rcu_read_lock();
2532 last = (struct nf_conntrack_expect *)cb->args[1];
2533restart:
2534 hlist_for_each_entry(exp, &help->expectations, lnode) {
2535 if (l3proto && exp->tuple.src.l3num != l3proto)
2536 continue;
2537 if (cb->args[1]) {
2538 if (exp != last)
2539 continue;
2540 cb->args[1] = 0;
2541 }
2542 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2543 cb->nlh->nlmsg_seq,
2544 IPCTNL_MSG_EXP_NEW,
2545 exp) < 0) {
2546 if (!atomic_inc_not_zero(&exp->use))
2547 continue;
2548 cb->args[1] = (unsigned long)exp;
2549 goto out;
2550 }
2551 }
2552 if (cb->args[1]) {
2553 cb->args[1] = 0;
2554 goto restart;
2555 }
2556 cb->args[0] = 1;
2557out:
2558 rcu_read_unlock();
2559 if (last)
2560 nf_ct_expect_put(last);
2561
2562 return skb->len;
2563}
2564
2565static int ctnetlink_dump_exp_ct(struct sock *ctnl, struct sk_buff *skb,
2566 const struct nlmsghdr *nlh,
2567 const struct nlattr * const cda[])
2568{
2569 int err;
2570 struct net *net = sock_net(ctnl);
2571 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2572 u_int8_t u3 = nfmsg->nfgen_family;
2573 struct nf_conntrack_tuple tuple;
2574 struct nf_conntrack_tuple_hash *h;
2575 struct nf_conn *ct;
2576 u16 zone = 0;
2577 struct netlink_dump_control c = {
2578 .dump = ctnetlink_exp_ct_dump_table,
2579 .done = ctnetlink_exp_done,
2580 };
2581
2582 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2583 if (err < 0)
2584 return err;
2585
2586 if (cda[CTA_EXPECT_ZONE]) {
2587 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2588 if (err < 0)
2589 return err;
2590 }
2591
2592 h = nf_conntrack_find_get(net, zone, &tuple);
2593 if (!h)
2594 return -ENOENT;
2595
2596 ct = nf_ct_tuplehash_to_ctrack(h);
2597 c.data = ct;
2598
2599 err = netlink_dump_start(ctnl, skb, nlh, &c);
2600 nf_ct_put(ct);
2601
2602 return err;
2603}
2604
c1d10adb 2605static int
601e68e1 2606ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2607 const struct nlmsghdr *nlh,
2608 const struct nlattr * const cda[])
c1d10adb 2609{
9592a5c0 2610 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2611 struct nf_conntrack_tuple tuple;
2612 struct nf_conntrack_expect *exp;
2613 struct sk_buff *skb2;
96bcf938 2614 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2615 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2616 u16 zone;
2617 int err;
c1d10adb 2618
b8f3ab42 2619 if (nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928
PNA		 2620 if (cda[CTA_EXPECT_MASTER])
2621 return ctnetlink_dump_exp_ct(ctnl, skb, nlh, cda);
2622 else {
2623 struct netlink_dump_control c = {
2624 .dump = ctnetlink_exp_dump_table,
2625 .done = ctnetlink_exp_done,
2626 };
2627 return netlink_dump_start(ctnl, skb, nlh, &c);
2628 }
c1d10adb
PNA		 2629 }
2630
ef00f89f
PM		 2631 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2632 if (err < 0)
2633 return err;
2634
35dba1d7
PNA		 2635 if (cda[CTA_EXPECT_TUPLE])
2636 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2637 else if (cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2638 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2639 else
2640 return -EINVAL;
2641
2642 if (err < 0)
2643 return err;
2644
ef00f89f 2645 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2646 if (!exp)
2647 return -ENOENT;
2648
df6fb868 2649 if (cda[CTA_EXPECT_ID]) {
77236b6e 2650 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2651 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2652 nf_ct_expect_put(exp);
c1d10adb
PNA		 2653 return -ENOENT;
2654 }
601e68e1 2655 }
c1d10adb
PNA		 2656
2657 err = -ENOMEM;
96bcf938 2658 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2659 if (skb2 == NULL) {
2660 nf_ct_expect_put(exp);
c1d10adb 2661 goto out;
81378f72 2662 }
4e9b8269 2663
528a3a6f 2664 rcu_read_lock();
15e47304 2665 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
8b0a231d 2666 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2667 rcu_read_unlock();
81378f72 2668 nf_ct_expect_put(exp);
c1d10adb
PNA		 2669 if (err <= 0)
2670 goto free;
2671
15e47304 2672 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
81378f72
PNA		 2673 if (err < 0)
2674 goto out;
c1d10adb 2675
81378f72 2676 return 0;
c1d10adb
PNA		 2677
2678free:
2679 kfree_skb(skb2);
2680out:
81378f72
PNA		 2681 /* this avoids a loop in nfnetlink. */
2682 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2683}
2684
2685static int
601e68e1 2686ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2687 const struct nlmsghdr *nlh,
2688 const struct nlattr * const cda[])
c1d10adb 2689{
9592a5c0 2690 struct net *net = sock_net(ctnl);
31f15875 2691 struct nf_conntrack_expect *exp;
c1d10adb 2692 struct nf_conntrack_tuple tuple;
96bcf938 2693 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
b67bfe0d 2694 struct hlist_node *next;
c1d10adb 2695 u_int8_t u3 = nfmsg->nfgen_family;
31f15875 2696 unsigned int i;
ef00f89f 2697 u16 zone;
c1d10adb
PNA		 2698 int err;
2699
df6fb868 2700 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2701 /* delete a single expect by tuple */
ef00f89f
PM		 2702 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2703 if (err < 0)
2704 return err;
2705
c1d10adb
PNA		 2706 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2707 if (err < 0)
2708 return err;
2709
2710 /* bump usage count to 2 */
ef00f89f 2711 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2712 if (!exp)
2713 return -ENOENT;
2714
df6fb868 2715 if (cda[CTA_EXPECT_ID]) {
77236b6e 2716 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2717 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2718 nf_ct_expect_put(exp);
c1d10adb
PNA		 2719 return -ENOENT;
2720 }
2721 }
2722
2723 /* after list removal, usage count == 1 */
ca7433df 2724 spin_lock_bh(&nf_conntrack_expect_lock);
ebbf41df 2725 if (del_timer(&exp->timeout)) {
15e47304 2726 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
ebbf41df
PNA		 2727 nlmsg_report(nlh));
2728 nf_ct_expect_put(exp);
2729 }
ca7433df 2730 spin_unlock_bh(&nf_conntrack_expect_lock);
601e68e1 2731 /* have to put what we 'get' above.
c1d10adb 2732 * after this line usage count == 0 */
6823645d 2733 nf_ct_expect_put(exp);
df6fb868
PM		 2734 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2735 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
31f15875 2736 struct nf_conn_help *m_help;
c1d10adb
PNA		 2737
2738 /* delete all expectations for this helper */
ca7433df 2739 spin_lock_bh(&nf_conntrack_expect_lock);
31f15875 2740 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2741 hlist_for_each_entry_safe(exp, next,
9592a5c0 2742 &net->ct.expect_hash[i],
31f15875
PM		 2743 hnode) {
2744 m_help = nfct_help(exp->master);
794e6871
PM		 2745 if (!strcmp(m_help->helper->name, name) &&
2746 del_timer(&exp->timeout)) {
ebbf41df 2747 nf_ct_unlink_expect_report(exp,
15e47304 2748 NETLINK_CB(skb).portid,
ebbf41df 2749 nlmsg_report(nlh));
31f15875
PM		 2750 nf_ct_expect_put(exp);
2751 }
c1d10adb
PNA		 2752 }
2753 }
ca7433df 2754 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb
PNA		 2755 } else {
2756 /* This basically means we have to flush everything*/
ca7433df 2757 spin_lock_bh(&nf_conntrack_expect_lock);
31f15875 2758 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2759 hlist_for_each_entry_safe(exp, next,
9592a5c0 2760 &net->ct.expect_hash[i],
31f15875
PM		 2761 hnode) {
2762 if (del_timer(&exp->timeout)) {
ebbf41df 2763 nf_ct_unlink_expect_report(exp,
15e47304 2764 NETLINK_CB(skb).portid,
ebbf41df 2765 nlmsg_report(nlh));
31f15875
PM		 2766 nf_ct_expect_put(exp);
2767 }
c1d10adb
PNA		 2768 }
2769 }
ca7433df 2770 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb
PNA		 2771 }
2772
2773 return 0;
2774}
2775static int
39938324
PM		 2776ctnetlink_change_expect(struct nf_conntrack_expect *x,
2777 const struct nlattr * const cda[])
c1d10adb 2778{
9768e1ac
KW		 2779 if (cda[CTA_EXPECT_TIMEOUT]) {
2780 if (!del_timer(&x->timeout))
2781 return -ETIME;
2782
2783 x->timeout.expires = jiffies +
2784 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2785 add_timer(&x->timeout);
2786 }
2787 return 0;
c1d10adb
PNA		 2788}
2789
076a0ca0
PNA		 2790static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2791 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2792 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2793};
2794
2795static int
2796ctnetlink_parse_expect_nat(const struct nlattr *attr,
2797 struct nf_conntrack_expect *exp,
2798 u_int8_t u3)
2799{
2800#ifdef CONFIG_NF_NAT_NEEDED
2801 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2802 struct nf_conntrack_tuple nat_tuple = {};
2803 int err;
2804
130ffbc2
DB		 2805 err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2806 if (err < 0)
2807 return err;
076a0ca0
PNA		 2808
2809 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2810 return -EINVAL;
2811
2812 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2813 &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3);
2814 if (err < 0)
2815 return err;
2816
c7232c99 2817 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 2818 exp->saved_proto = nat_tuple.src.u;
2819 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2820
2821 return 0;
2822#else
2823 return -EOPNOTSUPP;
2824#endif
2825}
2826
0ef71ee1
PNA		 2827static struct nf_conntrack_expect *
2828ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
2829 struct nf_conntrack_helper *helper,
2830 struct nf_conntrack_tuple *tuple,
2831 struct nf_conntrack_tuple *mask)
c1d10adb 2832{
0ef71ee1 2833 u_int32_t class = 0;
c1d10adb 2834 struct nf_conntrack_expect *exp;
dc808fe2 2835 struct nf_conn_help *help;
0ef71ee1 2836 int err;
660fdb2a 2837
b8c5e52c
PNA		 2838 if (cda[CTA_EXPECT_CLASS] && helper) {
2839 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
0ef71ee1
PNA		 2840 if (class > helper->expect_class_max)
2841 return ERR_PTR(-EINVAL);
b8c5e52c 2842 }
6823645d 2843 exp = nf_ct_expect_alloc(ct);
0ef71ee1
PNA		 2844 if (!exp)
2845 return ERR_PTR(-ENOMEM);
2846
bc01befd
PNA		 2847 help = nfct_help(ct);
2848 if (!help) {
2849 if (!cda[CTA_EXPECT_TIMEOUT]) {
2850 err = -EINVAL;
1310b955 2851 goto err_out;
bc01befd
PNA		 2852 }
2853 exp->timeout.expires =
2854 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
601e68e1 2855
bc01befd
PNA		 2856 exp->flags = NF_CT_EXPECT_USERSPACE;
2857 if (cda[CTA_EXPECT_FLAGS]) {
2858 exp->flags |=
2859 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2860 }
2861 } else {
2862 if (cda[CTA_EXPECT_FLAGS]) {
2863 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2864 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
2865 } else
2866 exp->flags = 0;
2867 }
544d5c7d
PNA		 2868 if (cda[CTA_EXPECT_FN]) {
2869 const char *name = nla_data(cda[CTA_EXPECT_FN]);
2870 struct nf_ct_helper_expectfn *expfn;
2871
2872 expfn = nf_ct_helper_expectfn_find_by_name(name);
2873 if (expfn == NULL) {
2874 err = -EINVAL;
2875 goto err_out;
2876 }
2877 exp->expectfn = expfn->expectfn;
2878 } else
2879 exp->expectfn = NULL;
601e68e1 2880
b8c5e52c 2881 exp->class = class;
c1d10adb 2882 exp->master = ct;
660fdb2a 2883 exp->helper = helper;
0ef71ee1
PNA		 2884 exp->tuple = *tuple;
2885 exp->mask.src.u3 = mask->src.u3;
2886 exp->mask.src.u.all = mask->src.u.all;
c1d10adb 2887
076a0ca0
PNA		 2888 if (cda[CTA_EXPECT_NAT]) {
2889 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
0ef71ee1 2890 exp, nf_ct_l3num(ct));
076a0ca0
PNA		 2891 if (err < 0)
2892 goto err_out;
2893 }
0ef71ee1 2894 return exp;
076a0ca0 2895err_out:
6823645d 2896 nf_ct_expect_put(exp);
0ef71ee1
PNA		 2897 return ERR_PTR(err);
2898}
2899
2900static int
2901ctnetlink_create_expect(struct net *net, u16 zone,
2902 const struct nlattr * const cda[],
2903 u_int8_t u3, u32 portid, int report)
2904{
2905 struct nf_conntrack_tuple tuple, mask, master_tuple;
2906 struct nf_conntrack_tuple_hash *h = NULL;
2907 struct nf_conntrack_helper *helper = NULL;
2908 struct nf_conntrack_expect *exp;
2909 struct nf_conn *ct;
2910 int err;
2911
2912 /* caller guarantees that those three CTA_EXPECT_* exist */
2913 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2914 if (err < 0)
2915 return err;
2916 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
2917 if (err < 0)
2918 return err;
2919 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
2920 if (err < 0)
2921 return err;
2922
2923 /* Look for master conntrack of this expectation */
2924 h = nf_conntrack_find_get(net, zone, &master_tuple);
2925 if (!h)
2926 return -ENOENT;
2927 ct = nf_ct_tuplehash_to_ctrack(h);
2928
2929 if (cda[CTA_EXPECT_HELP_NAME]) {
2930 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2931
2932 helper = __nf_conntrack_helper_find(helpname, u3,
2933 nf_ct_protonum(ct));
2934 if (helper == NULL) {
2935#ifdef CONFIG_MODULES
2936 if (request_module("nfct-helper-%s", helpname) < 0) {
2937 err = -EOPNOTSUPP;
2938 goto err_ct;
2939 }
2940 helper = __nf_conntrack_helper_find(helpname, u3,
2941 nf_ct_protonum(ct));
2942 if (helper) {
2943 err = -EAGAIN;
2944 goto err_ct;
2945 }
2946#endif
2947 err = -EOPNOTSUPP;
2948 goto err_ct;
2949 }
2950 }
2951
2952 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
2953 if (IS_ERR(exp)) {
2954 err = PTR_ERR(exp);
2955 goto err_ct;
2956 }
2957
2958 err = nf_ct_expect_related_report(exp, portid, report);
2959 if (err < 0)
2960 goto err_exp;
2961
2962 return 0;
2963err_exp:
2964 nf_ct_expect_put(exp);
2965err_ct:
2966 nf_ct_put(ct);
c1d10adb
PNA		 2967 return err;
2968}
2969
2970static int
2971ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2972 const struct nlmsghdr *nlh,
2973 const struct nlattr * const cda[])
c1d10adb 2974{
9592a5c0 2975 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2976 struct nf_conntrack_tuple tuple;
2977 struct nf_conntrack_expect *exp;
96bcf938 2978 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2979 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2980 u16 zone;
2981 int err;
c1d10adb 2982
df6fb868
PM		 2983 if (!cda[CTA_EXPECT_TUPLE]
2984 || !cda[CTA_EXPECT_MASK]
2985 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2986 return -EINVAL;
2987
ef00f89f
PM		 2988 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2989 if (err < 0)
2990 return err;
2991
c1d10adb
PNA		 2992 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2993 if (err < 0)
2994 return err;
2995
ca7433df 2996 spin_lock_bh(&nf_conntrack_expect_lock);
ef00f89f 2997 exp = __nf_ct_expect_find(net, zone, &tuple);
c1d10adb
PNA		 2998
2999 if (!exp) {
ca7433df 3000 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3001 err = -ENOENT;
19abb7b0 3002 if (nlh->nlmsg_flags & NLM_F_CREATE) {
ef00f89f 3003 err = ctnetlink_create_expect(net, zone, cda,
19abb7b0 3004 u3,
15e47304 3005 NETLINK_CB(skb).portid,
19abb7b0
PNA		 3006 nlmsg_report(nlh));
3007 }
c1d10adb
PNA		 3008 return err;
3009 }
3010
3011 err = -EEXIST;
3012 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
3013 err = ctnetlink_change_expect(exp, cda);
ca7433df 3014 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3015
c1d10adb
PNA		 3016 return err;
3017}
3018
392025f8 3019static int
15e47304 3020ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 3021 const struct ip_conntrack_stat *st)
3022{
3023 struct nlmsghdr *nlh;
3024 struct nfgenmsg *nfmsg;
15e47304 3025 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 3026
3027 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU);
15e47304 3028 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 3029 if (nlh == NULL)
3030 goto nlmsg_failure;
3031
3032 nfmsg = nlmsg_data(nlh);
3033 nfmsg->nfgen_family = AF_UNSPEC;
3034 nfmsg->version = NFNETLINK_V0;
3035 nfmsg->res_id = htons(cpu);
3036
3037 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3038 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3039 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3040 goto nla_put_failure;
3041
3042 nlmsg_end(skb, nlh);
3043 return skb->len;
3044
3045nla_put_failure:
3046nlmsg_failure:
3047 nlmsg_cancel(skb, nlh);
3048 return -1;
3049}
3050
3051static int
3052ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3053{
3054 int cpu;
3055 struct net *net = sock_net(skb->sk);
3056
3057 if (cb->args[0] == nr_cpu_ids)
3058 return 0;
3059
3060 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3061 const struct ip_conntrack_stat *st;
3062
3063 if (!cpu_possible(cpu))
3064 continue;
3065
3066 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 3067 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 3068 cb->nlh->nlmsg_seq,
3069 cpu, st) < 0)
3070 break;
3071 }
3072 cb->args[0] = cpu;
3073
3074 return skb->len;
3075}
3076
3077static int
3078ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb,
3079 const struct nlmsghdr *nlh,
3080 const struct nlattr * const cda[])
3081{
3082 if (nlh->nlmsg_flags & NLM_F_DUMP) {
3083 struct netlink_dump_control c = {
3084 .dump = ctnetlink_exp_stat_cpu_dump,
3085 };
3086 return netlink_dump_start(ctnl, skb, nlh, &c);
3087 }
3088
3089 return 0;
3090}
3091
c1d10adb 3092#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 3093static struct nf_ct_event_notifier ctnl_notifier = {
3094 .fcn = ctnetlink_conntrack_event,
c1d10adb
PNA		 3095};
3096
e34d5c1a
PNA		 3097static struct nf_exp_event_notifier ctnl_notifier_exp = {
3098 .fcn = ctnetlink_expect_event,
c1d10adb
PNA		 3099};
3100#endif
3101
7c8d4cb4 3102static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
c1d10adb 3103 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
f73e924c
PM		 3104 .attr_count = CTA_MAX,
3105 .policy = ct_nla_policy },
c1d10adb 3106 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3107 .attr_count = CTA_MAX,
3108 .policy = ct_nla_policy },
c1d10adb 3109 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
f73e924c
PM		 3110 .attr_count = CTA_MAX,
3111 .policy = ct_nla_policy },
c1d10adb 3112 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3113 .attr_count = CTA_MAX,
3114 .policy = ct_nla_policy },
392025f8
PNA		 3115 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
3116 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
d871befe
PNA		 3117 [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying },
3118 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed },
c1d10adb
PNA		 3119};
3120
7c8d4cb4 3121static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
c1d10adb 3122 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
f73e924c
PM		 3123 .attr_count = CTA_EXPECT_MAX,
3124 .policy = exp_nla_policy },
c1d10adb 3125 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
f73e924c
PM		 3126 .attr_count = CTA_EXPECT_MAX,
3127 .policy = exp_nla_policy },
c1d10adb 3128 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
f73e924c
PM		 3129 .attr_count = CTA_EXPECT_MAX,
3130 .policy = exp_nla_policy },
392025f8 3131 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
c1d10adb
PNA		 3132};
3133
7c8d4cb4 3134static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 3135 .name = "conntrack",
3136 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3137 .cb_count = IPCTNL_MSG_MAX,
3138 .cb = ctnl_cb,
3139};
3140
7c8d4cb4 3141static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 3142 .name = "conntrack_expect",
3143 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3144 .cb_count = IPCTNL_MSG_EXP_MAX,
3145 .cb = ctnl_exp_cb,
3146};
3147
d2483dde 3148MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 3149MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 3150MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 3151
70e9942f
PNA		 3152static int __net_init ctnetlink_net_init(struct net *net)
3153{
3154#ifdef CONFIG_NF_CONNTRACK_EVENTS
3155 int ret;
3156
3157 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
3158 if (ret < 0) {
3159 pr_err("ctnetlink_init: cannot register notifier.\n");
3160 goto err_out;
3161 }
3162
3163 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
3164 if (ret < 0) {
3165 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3166 goto err_unreg_notifier;
3167 }
3168#endif
3169 return 0;
3170
3171#ifdef CONFIG_NF_CONNTRACK_EVENTS
3172err_unreg_notifier:
3173 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3174err_out:
3175 return ret;
3176#endif
3177}
3178
3179static void ctnetlink_net_exit(struct net *net)
3180{
3181#ifdef CONFIG_NF_CONNTRACK_EVENTS
3182 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
3183 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3184#endif
3185}
3186
3187static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
3188{
3189 struct net *net;
3190
3191 list_for_each_entry(net, net_exit_list, exit_list)
3192 ctnetlink_net_exit(net);
3193}
3194
3195static struct pernet_operations ctnetlink_net_ops = {
3196 .init = ctnetlink_net_init,
3197 .exit_batch = ctnetlink_net_exit_batch,
3198};
3199
c1d10adb
PNA		 3200static int __init ctnetlink_init(void)
3201{
3202 int ret;
3203
654d0fbd 3204 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
c1d10adb
PNA		 3205 ret = nfnetlink_subsys_register(&ctnl_subsys);
3206 if (ret < 0) {
654d0fbd 3207 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 3208 goto err_out;
3209 }
3210
3211 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3212 if (ret < 0) {
654d0fbd 3213 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 3214 goto err_unreg_subsys;
3215 }
3216
ef6acf68
JL		 3217 ret = register_pernet_subsys(&ctnetlink_net_ops);
3218 if (ret < 0) {
70e9942f 3219 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 3220 goto err_unreg_exp_subsys;
3221 }
7c622345 3222#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 3223 /* setup interaction between nf_queue and nf_conntrack_netlink. */
3224 RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook);
3225#endif
c1d10adb
PNA		 3226 return 0;
3227
c1d10adb
PNA		 3228err_unreg_exp_subsys:
3229 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 3230err_unreg_subsys:
3231 nfnetlink_subsys_unregister(&ctnl_subsys);
3232err_out:
3233 return ret;
3234}
3235
3236static void __exit ctnetlink_exit(void)
3237{
654d0fbd 3238 pr_info("ctnetlink: unregistering from nfnetlink.\n");
c1d10adb 3239
70e9942f 3240 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 3241 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3242 nfnetlink_subsys_unregister(&ctnl_subsys);
7c622345 3243#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 3244 RCU_INIT_POINTER(nfq_ct_hook, NULL);
3245#endif
c1d10adb
PNA		 3246}
3247
3248module_init(ctnetlink_init);
3249module_exit(ctnetlink_exit);
Linux kernel - Deliverables
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