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ipv4: Cap ADVMSS metric in the FIB rather than the routing cache.
[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>
70e9942f 7 * (C) 2005-2011 by Pablo Neira Ayuso <pablo@netfilter.org>
c1d10adb 8 *
601e68e1 9 * Initial connection tracking via netlink development funded and
c1d10adb
PNA		 10 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
11 *
12 * Further development of this code funded by Astaro AG (http://www.astaro.com)
13 *
14 * This software may be used and distributed according to the terms
15 * of the GNU General Public License, incorporated herein by reference.
c1d10adb
PNA		 16 */
17
18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
711bbdd6 21#include <linux/rculist.h>
ea781f19 22#include <linux/rculist_nulls.h>
c1d10adb
PNA		 23#include <linux/types.h>
24#include <linux/timer.h>
1cc63249 25#include <linux/security.h>
c1d10adb
PNA		 26#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/netlink.h>
29#include <linux/spinlock.h>
40a839fd 30#include <linux/interrupt.h>
5a0e3ad6 31#include <linux/slab.h>
c1d10adb
PNA		 32
33#include <linux/netfilter.h>
dc5fc579 34#include <net/netlink.h>
9592a5c0 35#include <net/sock.h>
c1d10adb
PNA		 36#include <net/netfilter/nf_conntrack.h>
37#include <net/netfilter/nf_conntrack_core.h>
77ab9cff 38#include <net/netfilter/nf_conntrack_expect.h>
c1d10adb
PNA		 39#include <net/netfilter/nf_conntrack_helper.h>
40#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6 41#include <net/netfilter/nf_conntrack_l4proto.h>
5b1158e9 42#include <net/netfilter/nf_conntrack_tuple.h>
58401572 43#include <net/netfilter/nf_conntrack_acct.h>
ef00f89f 44#include <net/netfilter/nf_conntrack_zones.h>
a992ca2a 45#include <net/netfilter/nf_conntrack_timestamp.h>
5b1158e9
JK		 46#ifdef CONFIG_NF_NAT_NEEDED
47#include <net/netfilter/nf_nat_core.h>
48#include <net/netfilter/nf_nat_protocol.h>
8c88f87c 49#include <net/netfilter/nf_nat_helper.h>
5b1158e9 50#endif
c1d10adb
PNA		 51
52#include <linux/netfilter/nfnetlink.h>
53#include <linux/netfilter/nfnetlink_conntrack.h>
54
55MODULE_LICENSE("GPL");
56
dc808fe2 57static char __initdata version[] = "0.93";
c1d10adb 58
c1d10adb 59static inline int
601e68e1 60ctnetlink_dump_tuples_proto(struct sk_buff *skb,
1cde6436 61 const struct nf_conntrack_tuple *tuple,
605dcad6 62 struct nf_conntrack_l4proto *l4proto)
c1d10adb 63{
c1d10adb 64 int ret = 0;
df6fb868 65 struct nlattr *nest_parms;
c1d10adb 66
df6fb868
PM		 67 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
68 if (!nest_parms)
69 goto nla_put_failure;
cc1eb431
DM		 70 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
71 goto nla_put_failure;
c1d10adb 72
fdf70832
PM		 73 if (likely(l4proto->tuple_to_nlattr))
74 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 75
df6fb868 76 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 77
78 return ret;
79
df6fb868 80nla_put_failure:
c1d10adb
PNA		 81 return -1;
82}
83
84static inline int
1cde6436
PNA		 85ctnetlink_dump_tuples_ip(struct sk_buff *skb,
86 const struct nf_conntrack_tuple *tuple,
87 struct nf_conntrack_l3proto *l3proto)
c1d10adb 88{
c1d10adb 89 int ret = 0;
df6fb868
PM		 90 struct nlattr *nest_parms;
91
92 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
93 if (!nest_parms)
94 goto nla_put_failure;
1cde6436 95
fdf70832
PM		 96 if (likely(l3proto->tuple_to_nlattr))
97 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 98
df6fb868 99 nla_nest_end(skb, nest_parms);
c1d10adb 100
1cde6436
PNA		 101 return ret;
102
df6fb868 103nla_put_failure:
1cde6436
PNA		 104 return -1;
105}
106
bb5cf80e 107static int
1cde6436
PNA		 108ctnetlink_dump_tuples(struct sk_buff *skb,
109 const struct nf_conntrack_tuple *tuple)
110{
111 int ret;
112 struct nf_conntrack_l3proto *l3proto;
605dcad6 113 struct nf_conntrack_l4proto *l4proto;
1cde6436 114
3b988ece 115 rcu_read_lock();
528a3a6f 116 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 117 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 118
3b988ece
HS		 119 if (ret >= 0) {
120 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
121 tuple->dst.protonum);
122 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
123 }
124 rcu_read_unlock();
c1d10adb 125 return ret;
c1d10adb
PNA		 126}
127
128static inline int
129ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
130{
cc1eb431
DM		 131 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
132 goto nla_put_failure;
c1d10adb
PNA		 133 return 0;
134
df6fb868 135nla_put_failure:
c1d10adb
PNA		 136 return -1;
137}
138
139static inline int
140ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
141{
c1216382 142 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
c1d10adb 143
77236b6e 144 if (timeout < 0)
c1d10adb 145 timeout = 0;
601e68e1 146
cc1eb431
DM		 147 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
148 goto nla_put_failure;
c1d10adb
PNA		 149 return 0;
150
df6fb868 151nla_put_failure:
c1d10adb
PNA		 152 return -1;
153}
154
155static inline int
440f0d58 156ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 157{
5e8fbe2a 158 struct nf_conntrack_l4proto *l4proto;
df6fb868 159 struct nlattr *nest_proto;
c1d10adb
PNA		 160 int ret;
161
528a3a6f
PNA		 162 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
163 if (!l4proto->to_nlattr)
c1d10adb 164 return 0;
601e68e1 165
df6fb868
PM		 166 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
167 if (!nest_proto)
168 goto nla_put_failure;
c1d10adb 169
fdf70832 170 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 171
df6fb868 172 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 173
174 return ret;
175
df6fb868 176nla_put_failure:
c1d10adb
PNA		 177 return -1;
178}
179
180static inline int
181ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
182{
df6fb868 183 struct nlattr *nest_helper;
dc808fe2 184 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 185 struct nf_conntrack_helper *helper;
c1d10adb 186
3c158f7f 187 if (!help)
c1d10adb 188 return 0;
601e68e1 189
3c158f7f
PM		 190 helper = rcu_dereference(help->helper);
191 if (!helper)
192 goto out;
193
df6fb868
PM		 194 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
195 if (!nest_helper)
196 goto nla_put_failure;
cc1eb431
DM		 197 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
198 goto nla_put_failure;
c1d10adb 199
fdf70832
PM		 200 if (helper->to_nlattr)
201 helper->to_nlattr(skb, ct);
c1d10adb 202
df6fb868 203 nla_nest_end(skb, nest_helper);
3c158f7f 204out:
c1d10adb
PNA		 205 return 0;
206
df6fb868 207nla_put_failure:
c1d10adb
PNA		 208 return -1;
209}
210
bb5cf80e 211static int
80e60e67
PNA		 212dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes,
213 enum ip_conntrack_dir dir)
c1d10adb
PNA		 214{
215 enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
df6fb868 216 struct nlattr *nest_count;
c1d10adb 217
df6fb868
PM		 218 nest_count = nla_nest_start(skb, type | NLA_F_NESTED);
219 if (!nest_count)
220 goto nla_put_failure;
221
cc1eb431
DM		 222 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) ||
223 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes)))
224 goto nla_put_failure;
c1d10adb 225
df6fb868 226 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 227
228 return 0;
229
df6fb868 230nla_put_failure:
c1d10adb
PNA		 231 return -1;
232}
c1d10adb 233
80e60e67
PNA		 234static int
235ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
236 enum ip_conntrack_dir dir, int type)
237{
238 struct nf_conn_counter *acct;
239 u64 pkts, bytes;
240
241 acct = nf_conn_acct_find(ct);
242 if (!acct)
243 return 0;
244
245 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
246 pkts = atomic64_xchg(&acct[dir].packets, 0);
247 bytes = atomic64_xchg(&acct[dir].bytes, 0);
248 } else {
249 pkts = atomic64_read(&acct[dir].packets);
250 bytes = atomic64_read(&acct[dir].bytes);
251 }
252 return dump_counters(skb, pkts, bytes, dir);
253}
254
a992ca2a
PNA		 255static int
256ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
257{
258 struct nlattr *nest_count;
259 const struct nf_conn_tstamp *tstamp;
260
261 tstamp = nf_conn_tstamp_find(ct);
262 if (!tstamp)
263 return 0;
264
265 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
266 if (!nest_count)
267 goto nla_put_failure;
268
cc1eb431
DM		 269 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) ||
270 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
271 cpu_to_be64(tstamp->stop))))
272 goto nla_put_failure;
a992ca2a
PNA		 273 nla_nest_end(skb, nest_count);
274
275 return 0;
276
277nla_put_failure:
278 return -1;
279}
280
c1d10adb
PNA		 281#ifdef CONFIG_NF_CONNTRACK_MARK
282static inline int
283ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
284{
cc1eb431
DM		 285 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
286 goto nla_put_failure;
c1d10adb
PNA		 287 return 0;
288
df6fb868 289nla_put_failure:
c1d10adb
PNA		 290 return -1;
291}
292#else
293#define ctnetlink_dump_mark(a, b) (0)
294#endif
295
37fccd85
PNA		 296#ifdef CONFIG_NF_CONNTRACK_SECMARK
297static inline int
1cc63249 298ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 299{
1cc63249
EP		 300 struct nlattr *nest_secctx;
301 int len, ret;
302 char *secctx;
303
304 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
305 if (ret)
cba85b53 306 return 0;
1cc63249
EP		 307
308 ret = -1;
309 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
310 if (!nest_secctx)
311 goto nla_put_failure;
37fccd85 312
cc1eb431
DM		 313 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
314 goto nla_put_failure;
1cc63249
EP		 315 nla_nest_end(skb, nest_secctx);
316
317 ret = 0;
37fccd85 318nla_put_failure:
1cc63249
EP		 319 security_release_secctx(secctx, len);
320 return ret;
37fccd85
PNA		 321}
322#else
1cc63249 323#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 324#endif
325
0f417ce9
PNA		 326#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
327
328static inline int
329ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
330{
331 struct nlattr *nest_parms;
332
333 if (!(ct->status & IPS_EXPECTED))
334 return 0;
335
336 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
337 if (!nest_parms)
338 goto nla_put_failure;
339 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
340 goto nla_put_failure;
341 nla_nest_end(skb, nest_parms);
342
343 return 0;
344
345nla_put_failure:
346 return -1;
347}
348
13eae15a 349#ifdef CONFIG_NF_NAT_NEEDED
bb5cf80e 350static int
13eae15a
PNA		 351dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type)
352{
13eae15a
PNA		 353 struct nlattr *nest_parms;
354
355 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
356 if (!nest_parms)
357 goto nla_put_failure;
358
cc1eb431
DM		 359 if (nla_put_be32(skb, CTA_NAT_SEQ_CORRECTION_POS,
360 htonl(natseq->correction_pos)) ||
361 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_BEFORE,
362 htonl(natseq->offset_before)) ||
363 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_AFTER,
364 htonl(natseq->offset_after)))
365 goto nla_put_failure;
13eae15a
PNA		 366
367 nla_nest_end(skb, nest_parms);
368
369 return 0;
370
371nla_put_failure:
372 return -1;
373}
374
375static inline int
376ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
377{
378 struct nf_nat_seq *natseq;
379 struct nf_conn_nat *nat = nfct_nat(ct);
380
381 if (!(ct->status & IPS_SEQ_ADJUST) || !nat)
382 return 0;
383
384 natseq = &nat->seq[IP_CT_DIR_ORIGINAL];
385 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1)
386 return -1;
387
388 natseq = &nat->seq[IP_CT_DIR_REPLY];
389 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1)
390 return -1;
391
392 return 0;
393}
394#else
395#define ctnetlink_dump_nat_seq_adj(a, b) (0)
396#endif
397
c1d10adb
PNA		 398static inline int
399ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
400{
cc1eb431
DM		 401 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
402 goto nla_put_failure;
c1d10adb
PNA		 403 return 0;
404
df6fb868 405nla_put_failure:
c1d10adb
PNA		 406 return -1;
407}
408
409static inline int
410ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
411{
cc1eb431
DM		 412 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
413 goto nla_put_failure;
c1d10adb
PNA		 414 return 0;
415
df6fb868 416nla_put_failure:
c1d10adb
PNA		 417 return -1;
418}
419
c1d10adb 420static int
80e60e67
PNA		 421ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, u32 type,
422 struct nf_conn *ct)
c1d10adb
PNA		 423{
424 struct nlmsghdr *nlh;
425 struct nfgenmsg *nfmsg;
df6fb868 426 struct nlattr *nest_parms;
80e60e67 427 unsigned int flags = pid ? NLM_F_MULTI : 0, event;
c1d10adb 428
80e60e67 429 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
96bcf938
PNA		 430 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
431 if (nlh == NULL)
432 goto nlmsg_failure;
c1d10adb 433
96bcf938 434 nfmsg = nlmsg_data(nlh);
5e8fbe2a 435 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 436 nfmsg->version = NFNETLINK_V0;
437 nfmsg->res_id = 0;
438
df6fb868
PM		 439 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
440 if (!nest_parms)
441 goto nla_put_failure;
f2f3e38c 442 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 443 goto nla_put_failure;
444 nla_nest_end(skb, nest_parms);
601e68e1 445
df6fb868
PM		 446 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
447 if (!nest_parms)
448 goto nla_put_failure;
f2f3e38c 449 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 450 goto nla_put_failure;
451 nla_nest_end(skb, nest_parms);
c1d10adb 452
cc1eb431
DM		 453 if (nf_ct_zone(ct) &&
454 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
455 goto nla_put_failure;
ef00f89f 456
c1d10adb
PNA		 457 if (ctnetlink_dump_status(skb, ct) < 0 ||
458 ctnetlink_dump_timeout(skb, ct) < 0 ||
80e60e67
PNA		 459 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 ||
460 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 461 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 462 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
463 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
464 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 465 ctnetlink_dump_secctx(skb, ct) < 0 ||
c1d10adb 466 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 467 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 468 ctnetlink_dump_master(skb, ct) < 0 ||
13eae15a 469 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
df6fb868 470 goto nla_put_failure;
c1d10adb 471
96bcf938 472 nlmsg_end(skb, nlh);
c1d10adb
PNA		 473 return skb->len;
474
475nlmsg_failure:
df6fb868 476nla_put_failure:
96bcf938 477 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 478 return -1;
479}
480
481#ifdef CONFIG_NF_CONNTRACK_EVENTS
03b64f51
PNA		 482static inline size_t
483ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4
HE		 484{
485 struct nf_conntrack_l3proto *l3proto;
486 struct nf_conntrack_l4proto *l4proto;
03b64f51
PNA		 487 size_t len = 0;
488
489 rcu_read_lock();
490 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
491 len += l3proto->nla_size;
492
493 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
494 len += l4proto->nla_size;
495 rcu_read_unlock();
496
497 return len;
498}
499
d26e6a02
JP		 500static inline size_t
501ctnetlink_counters_size(const struct nf_conn *ct)
502{
503 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
504 return 0;
505 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
506 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
507 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
508 ;
509}
510
cba85b53
PNA		 511static inline int
512ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 513{
cba85b53
PNA		 514#ifdef CONFIG_NF_CONNTRACK_SECMARK
515 int len, ret;
1cc63249 516
cba85b53
PNA		 517 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
518 if (ret)
519 return 0;
1cc63249 520
cba85b53
PNA		 521 return nla_total_size(0) /* CTA_SECCTX */
522 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
523#else
524 return 0;
1cc63249 525#endif
cba85b53 526}
1cc63249 527
a992ca2a
PNA		 528static inline size_t
529ctnetlink_timestamp_size(const struct nf_conn *ct)
530{
531#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
532 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
533 return 0;
534 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
535#else
536 return 0;
537#endif
538}
539
03b64f51
PNA		 540static inline size_t
541ctnetlink_nlmsg_size(const struct nf_conn *ct)
542{
543 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
544 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
545 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
546 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
547 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
548 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
549 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
d26e6a02 550 + ctnetlink_counters_size(ct)
a992ca2a 551 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 552 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
553 + nla_total_size(0) /* CTA_PROTOINFO */
554 + nla_total_size(0) /* CTA_HELP */
555 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 556 + ctnetlink_secctx_size(ct)
d271e8bd 557#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 558 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
559 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 560#endif
561#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 562 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
d271e8bd 563#endif
03b64f51
PNA		 564 + ctnetlink_proto_size(ct)
565 ;
2732c4e4
HE		 566}
567
e34d5c1a
PNA		 568static int
569ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 570{
9592a5c0 571 struct net *net;
c1d10adb
PNA		 572 struct nlmsghdr *nlh;
573 struct nfgenmsg *nfmsg;
df6fb868 574 struct nlattr *nest_parms;
19abb7b0 575 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 576 struct sk_buff *skb;
577 unsigned int type;
c1d10adb 578 unsigned int flags = 0, group;
dd7669a9 579 int err;
c1d10adb
PNA		 580
581 /* ignore our fake conntrack entry */
5bfddbd4 582 if (nf_ct_is_untracked(ct))
e34d5c1a 583 return 0;
c1d10adb 584
a0891aa6 585 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 586 type = IPCTNL_MSG_CT_DELETE;
587 group = NFNLGRP_CONNTRACK_DESTROY;
a0891aa6 588 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 589 type = IPCTNL_MSG_CT_NEW;
590 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 591 group = NFNLGRP_CONNTRACK_NEW;
17e6e4ea 592 } else if (events) {
c1d10adb
PNA		 593 type = IPCTNL_MSG_CT_NEW;
594 group = NFNLGRP_CONNTRACK_UPDATE;
595 } else
e34d5c1a 596 return 0;
a2427692 597
9592a5c0
AD		 598 net = nf_ct_net(ct);
599 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 600 return 0;
a2427692 601
03b64f51
PNA		 602 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
603 if (skb == NULL)
150ace0d 604 goto errout;
c1d10adb 605
c1d10adb 606 type |= NFNL_SUBSYS_CTNETLINK << 8;
96bcf938
PNA		 607 nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags);
608 if (nlh == NULL)
609 goto nlmsg_failure;
c1d10adb 610
96bcf938 611 nfmsg = nlmsg_data(nlh);
5e8fbe2a 612 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 613 nfmsg->version = NFNETLINK_V0;
614 nfmsg->res_id = 0;
615
528a3a6f 616 rcu_read_lock();
df6fb868
PM		 617 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
618 if (!nest_parms)
619 goto nla_put_failure;
f2f3e38c 620 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 621 goto nla_put_failure;
622 nla_nest_end(skb, nest_parms);
601e68e1 623
df6fb868
PM		 624 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
625 if (!nest_parms)
626 goto nla_put_failure;
f2f3e38c 627 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 628 goto nla_put_failure;
629 nla_nest_end(skb, nest_parms);
c1d10adb 630
cc1eb431
DM		 631 if (nf_ct_zone(ct) &&
632 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
633 goto nla_put_failure;
ef00f89f 634
1eedf699
EL		 635 if (ctnetlink_dump_id(skb, ct) < 0)
636 goto nla_put_failure;
637
e57dce60
FH		 638 if (ctnetlink_dump_status(skb, ct) < 0)
639 goto nla_put_failure;
640
a0891aa6 641 if (events & (1 << IPCT_DESTROY)) {
80e60e67
PNA		 642 if (ctnetlink_dump_counters(skb, ct,
643 IP_CT_DIR_ORIGINAL, type) < 0 ||
644 ctnetlink_dump_counters(skb, ct,
645 IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 646 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 647 goto nla_put_failure;
7b621c1e 648 } else {
7b621c1e 649 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 650 goto nla_put_failure;
7b621c1e 651
a0891aa6 652 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 653 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 654 goto nla_put_failure;
7b621c1e 655
a0891aa6 656 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 657 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 658 goto nla_put_failure;
7b621c1e 659
ff660c80 660#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 661 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 662 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 663 goto nla_put_failure;
ff660c80 664#endif
7b621c1e 665
a0891aa6 666 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 667 ctnetlink_dump_master(skb, ct) < 0)
668 goto nla_put_failure;
669
a0891aa6 670 if (events & (1 << IPCT_NATSEQADJ) &&
13eae15a
PNA		 671 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
672 goto nla_put_failure;
7b621c1e 673 }
b9a37e0c 674
a83099a6 675#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 676 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 677 && ctnetlink_dump_mark(skb, ct) < 0)
678 goto nla_put_failure;
679#endif
528a3a6f 680 rcu_read_unlock();
a83099a6 681
96bcf938 682 nlmsg_end(skb, nlh);
9592a5c0 683 err = nfnetlink_send(skb, net, item->pid, group, item->report,
cd8c20b6 684 GFP_ATOMIC);
dd7669a9
PNA		 685 if (err == -ENOBUFS || err == -EAGAIN)
686 return -ENOBUFS;
687
e34d5c1a 688 return 0;
c1d10adb 689
df6fb868 690nla_put_failure:
528a3a6f 691 rcu_read_unlock();
96bcf938 692 nlmsg_cancel(skb, nlh);
528a3a6f 693nlmsg_failure:
c1d10adb 694 kfree_skb(skb);
150ace0d 695errout:
37b7ef72
PNA		 696 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
697 return -ENOBUFS;
698
e34d5c1a 699 return 0;
c1d10adb
PNA		 700}
701#endif /* CONFIG_NF_CONNTRACK_EVENTS */
702
703static int ctnetlink_done(struct netlink_callback *cb)
704{
89f2e218
PM		 705 if (cb->args[1])
706 nf_ct_put((struct nf_conn *)cb->args[1]);
0f298a28
PNA		 707 if (cb->data)
708 kfree(cb->data);
c1d10adb
PNA		 709 return 0;
710}
711
0f298a28
PNA		 712struct ctnetlink_dump_filter {
713 struct {
714 u_int32_t val;
715 u_int32_t mask;
716 } mark;
717};
718
c1d10adb
PNA		 719static int
720ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
721{
9592a5c0 722 struct net *net = sock_net(skb->sk);
89f2e218 723 struct nf_conn *ct, *last;
c1d10adb 724 struct nf_conntrack_tuple_hash *h;
ea781f19 725 struct hlist_nulls_node *n;
96bcf938 726 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 727 u_int8_t l3proto = nfmsg->nfgen_family;
3b988ece 728 int res;
0f298a28
PNA		 729#ifdef CONFIG_NF_CONNTRACK_MARK
730 const struct ctnetlink_dump_filter *filter = cb->data;
731#endif
3b988ece 732
13ee6ac5 733 spin_lock_bh(&nf_conntrack_lock);
d205dc40 734 last = (struct nf_conn *)cb->args[1];
9ab99d5a 735 for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) {
89f2e218 736restart:
13ee6ac5 737 hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]],
ea781f19 738 hnnode) {
5b1158e9 739 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 740 continue;
741 ct = nf_ct_tuplehash_to_ctrack(h);
87711cb8
PNA		 742 /* Dump entries of a given L3 protocol number.
743 * If it is not specified, ie. l3proto == 0,
744 * then dump everything. */
5e8fbe2a 745 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 746 continue;
d205dc40
PM		 747 if (cb->args[1]) {
748 if (ct != last)
13ee6ac5 749 continue;
d205dc40 750 cb->args[1] = 0;
89f2e218 751 }
0f298a28
PNA		 752#ifdef CONFIG_NF_CONNTRACK_MARK
753 if (filter && !((ct->mark & filter->mark.mask) ==
754 filter->mark.val)) {
755 continue;
756 }
757#endif
3b988ece
HS		 758 rcu_read_lock();
759 res =
760 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
761 cb->nlh->nlmsg_seq,
762 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
763 ct);
764 rcu_read_unlock();
765 if (res < 0) {
c71caf41 766 nf_conntrack_get(&ct->ct_general);
89f2e218 767 cb->args[1] = (unsigned long)ct;
c1d10adb 768 goto out;
89f2e218
PM		 769 }
770 }
d205dc40 771 if (cb->args[1]) {
89f2e218
PM		 772 cb->args[1] = 0;
773 goto restart;
c1d10adb
PNA		 774 }
775 }
89f2e218 776out:
13ee6ac5 777 spin_unlock_bh(&nf_conntrack_lock);
d205dc40
PM		 778 if (last)
779 nf_ct_put(last);
c1d10adb 780
c1d10adb
PNA		 781 return skb->len;
782}
783
c1d10adb 784static inline int
df6fb868 785ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
c1d10adb 786{
df6fb868 787 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 788 struct nf_conntrack_l3proto *l3proto;
789 int ret = 0;
790
df6fb868 791 nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
c1d10adb 792
cd91566e
FW		 793 rcu_read_lock();
794 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 795
f73e924c
PM		 796 if (likely(l3proto->nlattr_to_tuple)) {
797 ret = nla_validate_nested(attr, CTA_IP_MAX,
798 l3proto->nla_policy);
799 if (ret == 0)
800 ret = l3proto->nlattr_to_tuple(tb, tuple);
801 }
c1d10adb 802
cd91566e 803 rcu_read_unlock();
c1d10adb 804
c1d10adb
PNA		 805 return ret;
806}
807
f73e924c
PM		 808static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
809 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 810};
811
812static inline int
df6fb868 813ctnetlink_parse_tuple_proto(struct nlattr *attr,
c1d10adb
PNA		 814 struct nf_conntrack_tuple *tuple)
815{
df6fb868 816 struct nlattr *tb[CTA_PROTO_MAX+1];
605dcad6 817 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 818 int ret = 0;
819
f73e924c
PM		 820 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
821 if (ret < 0)
822 return ret;
c1d10adb 823
df6fb868 824 if (!tb[CTA_PROTO_NUM])
c1d10adb 825 return -EINVAL;
77236b6e 826 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 827
cd91566e
FW		 828 rcu_read_lock();
829 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 830
f73e924c
PM		 831 if (likely(l4proto->nlattr_to_tuple)) {
832 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
833 l4proto->nla_policy);
834 if (ret == 0)
835 ret = l4proto->nlattr_to_tuple(tb, tuple);
836 }
c1d10adb 837
cd91566e 838 rcu_read_unlock();
601e68e1 839
c1d10adb
PNA		 840 return ret;
841}
842
d0b0268f
PM		 843static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
844 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
845 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
846};
847
bb5cf80e 848static int
39938324
PM		 849ctnetlink_parse_tuple(const struct nlattr * const cda[],
850 struct nf_conntrack_tuple *tuple,
a00f1f36 851 enum ctattr_type type, u_int8_t l3num)
c1d10adb 852{
df6fb868 853 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 854 int err;
855
c1d10adb
PNA		 856 memset(tuple, 0, sizeof(*tuple));
857
d0b0268f 858 nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
c1d10adb 859
df6fb868 860 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 861 return -EINVAL;
862
863 tuple->src.l3num = l3num;
864
df6fb868 865 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 866 if (err < 0)
867 return err;
868
df6fb868 869 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 870 return -EINVAL;
871
df6fb868 872 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 873 if (err < 0)
874 return err;
875
876 /* orig and expect tuples get DIR_ORIGINAL */
877 if (type == CTA_TUPLE_REPLY)
878 tuple->dst.dir = IP_CT_DIR_REPLY;
879 else
880 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
881
c1d10adb
PNA		 882 return 0;
883}
884
ef00f89f
PM		 885static int
886ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone)
887{
888 if (attr)
889#ifdef CONFIG_NF_CONNTRACK_ZONES
890 *zone = ntohs(nla_get_be16(attr));
891#else
892 return -EOPNOTSUPP;
893#endif
894 else
895 *zone = 0;
896
897 return 0;
898}
899
d0b0268f
PM		 900static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
901 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING },
902};
903
c1d10adb 904static inline int
ae243bee
PNA		 905ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
906 struct nlattr **helpinfo)
c1d10adb 907{
df6fb868 908 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 909
d0b0268f 910 nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
c1d10adb 911
df6fb868 912 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 913 return -EINVAL;
914
df6fb868 915 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 916
ae243bee
PNA		 917 if (tb[CTA_HELP_INFO])
918 *helpinfo = tb[CTA_HELP_INFO];
919
c1d10adb
PNA		 920 return 0;
921}
922
f73e924c 923static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 924 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
925 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 926 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 927 [CTA_PROTOINFO] = { .type = NLA_NESTED },
928 [CTA_HELP] = { .type = NLA_NESTED },
929 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 930 [CTA_TIMEOUT] = { .type = NLA_U32 },
931 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 932 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 933 [CTA_NAT_DST] = { .type = NLA_NESTED },
934 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
ef00f89f 935 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 936 [CTA_MARK_MASK] = { .type = NLA_U32 },
c1d10adb
PNA		 937};
938
939static int
601e68e1 940ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 941 const struct nlmsghdr *nlh,
942 const struct nlattr * const cda[])
c1d10adb 943{
9592a5c0 944 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 945 struct nf_conntrack_tuple_hash *h;
946 struct nf_conntrack_tuple tuple;
947 struct nf_conn *ct;
96bcf938 948 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 949 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 950 u16 zone;
951 int err;
952
953 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
954 if (err < 0)
955 return err;
c1d10adb 956
df6fb868 957 if (cda[CTA_TUPLE_ORIG])
c1d10adb 958 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 959 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 960 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
961 else {
962 /* Flush the whole table */
9592a5c0 963 nf_conntrack_flush_report(net,
274d383b
PNA		 964 NETLINK_CB(skb).pid,
965 nlmsg_report(nlh));
c1d10adb
PNA		 966 return 0;
967 }
968
969 if (err < 0)
970 return err;
971
ef00f89f 972 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 973 if (!h)
c1d10adb 974 return -ENOENT;
c1d10adb
PNA		 975
976 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 977
df6fb868 978 if (cda[CTA_ID]) {
77236b6e 979 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 980 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 981 nf_ct_put(ct);
982 return -ENOENT;
983 }
601e68e1 984 }
c1d10adb 985
a16a1647
PNA		 986 if (del_timer(&ct->timeout)) {
987 if (nf_conntrack_event_report(IPCT_DESTROY, ct,
988 NETLINK_CB(skb).pid,
989 nlmsg_report(nlh)) < 0) {
990 nf_ct_delete_from_lists(ct);
991 /* we failed to report the event, try later */
992 nf_ct_insert_dying_list(ct);
993 nf_ct_put(ct);
994 return 0;
995 }
996 /* death_by_timeout would report the event again */
997 set_bit(IPS_DYING_BIT, &ct->status);
dd7669a9 998 nf_ct_delete_from_lists(ct);
dd7669a9 999 nf_ct_put(ct);
dd7669a9 1000 }
c1d10adb 1001 nf_ct_put(ct);
c1d10adb
PNA		 1002
1003 return 0;
1004}
1005
1006static int
601e68e1 1007ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1008 const struct nlmsghdr *nlh,
1009 const struct nlattr * const cda[])
c1d10adb 1010{
9592a5c0 1011 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1012 struct nf_conntrack_tuple_hash *h;
1013 struct nf_conntrack_tuple tuple;
1014 struct nf_conn *ct;
1015 struct sk_buff *skb2 = NULL;
96bcf938 1016 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1017 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1018 u16 zone;
1019 int err;
c1d10adb 1020
80d326fa
PNA		 1021 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1022 struct netlink_dump_control c = {
1023 .dump = ctnetlink_dump_table,
1024 .done = ctnetlink_done,
1025 };
0f298a28
PNA		 1026#ifdef CONFIG_NF_CONNTRACK_MARK
1027 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1028 struct ctnetlink_dump_filter *filter;
1029
1030 filter = kzalloc(sizeof(struct ctnetlink_dump_filter),
1031 GFP_ATOMIC);
1032 if (filter == NULL)
1033 return -ENOMEM;
1034
1035 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
1036 filter->mark.mask =
1037 ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
1038 c.data = filter;
1039 }
1040#endif
80d326fa
PNA		 1041 return netlink_dump_start(ctnl, skb, nlh, &c);
1042 }
c1d10adb 1043
ef00f89f
PM		 1044 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1045 if (err < 0)
1046 return err;
1047
df6fb868 1048 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1049 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1050 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1051 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1052 else
1053 return -EINVAL;
1054
1055 if (err < 0)
1056 return err;
1057
ef00f89f 1058 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1059 if (!h)
c1d10adb 1060 return -ENOENT;
9ea8cfd6 1061
c1d10adb
PNA		 1062 ct = nf_ct_tuplehash_to_ctrack(h);
1063
1064 err = -ENOMEM;
96bcf938
PNA		 1065 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1066 if (skb2 == NULL) {
c1d10adb
PNA		 1067 nf_ct_put(ct);
1068 return -ENOMEM;
1069 }
c1d10adb 1070
528a3a6f 1071 rcu_read_lock();
601e68e1 1072 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
80e60e67 1073 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1074 rcu_read_unlock();
c1d10adb
PNA		 1075 nf_ct_put(ct);
1076 if (err <= 0)
1077 goto free;
1078
1079 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1080 if (err < 0)
1081 goto out;
1082
c1d10adb
PNA		 1083 return 0;
1084
1085free:
1086 kfree_skb(skb2);
1087out:
f31e8d49
PNA		 1088 /* this avoids a loop in nfnetlink. */
1089 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1090}
1091
67671841 1092#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1093static int
1094ctnetlink_parse_nat_setup(struct nf_conn *ct,
1095 enum nf_nat_manip_type manip,
39938324 1096 const struct nlattr *attr)
e6a7d3c0
PNA		 1097{
1098 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
1099
1100 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1101 if (!parse_nat_setup) {
95a5afca 1102#ifdef CONFIG_MODULES
e6a7d3c0
PNA		 1103 rcu_read_unlock();
1104 nfnl_unlock();
1105 if (request_module("nf-nat-ipv4") < 0) {
1106 nfnl_lock();
1107 rcu_read_lock();
1108 return -EOPNOTSUPP;
1109 }
1110 nfnl_lock();
1111 rcu_read_lock();
1112 if (nfnetlink_parse_nat_setup_hook)
1113 return -EAGAIN;
1114#endif
1115 return -EOPNOTSUPP;
1116 }
1117
1118 return parse_nat_setup(ct, manip, attr);
1119}
67671841 1120#endif
e6a7d3c0 1121
bb5cf80e 1122static int
39938324 1123ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1124{
1125 unsigned long d;
77236b6e 1126 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1127 d = ct->status ^ status;
1128
1129 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1130 /* unchangeable */
0adf9d67 1131 return -EBUSY;
601e68e1 1132
c1d10adb
PNA		 1133 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1134 /* SEEN_REPLY bit can only be set */
0adf9d67 1135 return -EBUSY;
601e68e1 1136
c1d10adb
PNA		 1137 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1138 /* ASSURED bit can only be set */
0adf9d67 1139 return -EBUSY;
c1d10adb 1140
c1d10adb
PNA		 1141 /* Be careful here, modifying NAT bits can screw up things,
1142 * so don't let users modify them directly if they don't pass
5b1158e9 1143 * nf_nat_range. */
c1d10adb
PNA		 1144 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1145 return 0;
1146}
1147
e6a7d3c0 1148static int
39938324 1149ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1150{
1151#ifdef CONFIG_NF_NAT_NEEDED
1152 int ret;
1153
1154 if (cda[CTA_NAT_DST]) {
1155 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1156 NF_NAT_MANIP_DST,
e6a7d3c0
PNA		 1157 cda[CTA_NAT_DST]);
1158 if (ret < 0)
1159 return ret;
1160 }
1161 if (cda[CTA_NAT_SRC]) {
1162 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1163 NF_NAT_MANIP_SRC,
e6a7d3c0
PNA		 1164 cda[CTA_NAT_SRC]);
1165 if (ret < 0)
1166 return ret;
1167 }
1168 return 0;
1169#else
1170 return -EOPNOTSUPP;
1171#endif
1172}
c1d10adb
PNA		 1173
1174static inline int
39938324 1175ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1176{
1177 struct nf_conntrack_helper *helper;
dc808fe2 1178 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1179 char *helpname = NULL;
ae243bee 1180 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1181 int err;
1182
c1d10adb
PNA		 1183 /* don't change helper of sibling connections */
1184 if (ct->master)
0adf9d67 1185 return -EBUSY;
c1d10adb 1186
ae243bee 1187 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1188 if (err < 0)
1189 return err;
1190
df293bbb
YK		 1191 if (!strcmp(helpname, "")) {
1192 if (help && help->helper) {
c1d10adb
PNA		 1193 /* we had a helper before ... */
1194 nf_ct_remove_expectations(ct);
a9b3cd7f 1195 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1196 }
df293bbb
YK		 1197
1198 return 0;
c1d10adb 1199 }
601e68e1 1200
794e6871
PM		 1201 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1202 nf_ct_protonum(ct));
226c0c0e
PNA		 1203 if (helper == NULL) {
1204#ifdef CONFIG_MODULES
1205 spin_unlock_bh(&nf_conntrack_lock);
1206
1207 if (request_module("nfct-helper-%s", helpname) < 0) {
1208 spin_lock_bh(&nf_conntrack_lock);
1209 return -EOPNOTSUPP;
1210 }
1211
1212 spin_lock_bh(&nf_conntrack_lock);
794e6871
PM		 1213 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1214 nf_ct_protonum(ct));
226c0c0e
PNA		 1215 if (helper)
1216 return -EAGAIN;
1217#endif
0adf9d67 1218 return -EOPNOTSUPP;
226c0c0e 1219 }
df293bbb 1220
ceceae1b 1221 if (help) {
ae243bee
PNA		 1222 if (help->helper == helper) {
1223 /* update private helper data if allowed. */
1224 if (helper->from_nlattr && helpinfo)
1225 helper->from_nlattr(helpinfo, ct);
ceceae1b 1226 return 0;
ae243bee 1227 }
ceceae1b
YK		 1228 if (help->helper)
1229 return -EBUSY;
1230 /* need to zero data of old helper */
1afc5679 1231 memset(help->data, 0, help->helper->data_len);
ceceae1b 1232 } else {
a88e22ad
PNA		 1233 /* we cannot set a helper for an existing conntrack */
1234 return -EOPNOTSUPP;
ceceae1b 1235 }
df293bbb 1236
cf778b00 1237 rcu_assign_pointer(help->helper, helper);
c1d10adb
PNA		 1238
1239 return 0;
1240}
1241
1242static inline int
39938324 1243ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1244{
77236b6e 1245 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
601e68e1 1246
c1d10adb
PNA		 1247 if (!del_timer(&ct->timeout))
1248 return -ETIME;
1249
1250 ct->timeout.expires = jiffies + timeout * HZ;
1251 add_timer(&ct->timeout);
1252
1253 return 0;
1254}
1255
d0b0268f
PM		 1256static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1257 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1258 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1259 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1260};
1261
c1d10adb 1262static inline int
39938324 1263ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1264{
39938324
PM		 1265 const struct nlattr *attr = cda[CTA_PROTOINFO];
1266 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
605dcad6 1267 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 1268 int err = 0;
1269
d0b0268f 1270 nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
c1d10adb 1271
cd91566e
FW		 1272 rcu_read_lock();
1273 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1274 if (l4proto->from_nlattr)
1275 err = l4proto->from_nlattr(tb, ct);
cd91566e 1276 rcu_read_unlock();
c1d10adb
PNA		 1277
1278 return err;
1279}
1280
13eae15a 1281#ifdef CONFIG_NF_NAT_NEEDED
d0b0268f
PM		 1282static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = {
1283 [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 },
1284 [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 },
1285 [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 },
1286};
1287
13eae15a 1288static inline int
39938324 1289change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr)
13eae15a
PNA		 1290{
1291 struct nlattr *cda[CTA_NAT_SEQ_MAX+1];
1292
d0b0268f 1293 nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy);
13eae15a
PNA		 1294
1295 if (!cda[CTA_NAT_SEQ_CORRECTION_POS])
1296 return -EINVAL;
1297
1298 natseq->correction_pos =
77236b6e 1299 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS]));
13eae15a
PNA		 1300
1301 if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE])
1302 return -EINVAL;
1303
1304 natseq->offset_before =
77236b6e 1305 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE]));
13eae15a
PNA		 1306
1307 if (!cda[CTA_NAT_SEQ_OFFSET_AFTER])
1308 return -EINVAL;
1309
1310 natseq->offset_after =
77236b6e 1311 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER]));
13eae15a
PNA		 1312
1313 return 0;
1314}
1315
1316static int
39938324
PM		 1317ctnetlink_change_nat_seq_adj(struct nf_conn *ct,
1318 const struct nlattr * const cda[])
13eae15a
PNA		 1319{
1320 int ret = 0;
1321 struct nf_conn_nat *nat = nfct_nat(ct);
1322
1323 if (!nat)
1324 return 0;
1325
1326 if (cda[CTA_NAT_SEQ_ADJ_ORIG]) {
1327 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL],
1328 cda[CTA_NAT_SEQ_ADJ_ORIG]);
1329 if (ret < 0)
1330 return ret;
1331
1332 ct->status |= IPS_SEQ_ADJUST;
1333 }
1334
1335 if (cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1336 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY],
1337 cda[CTA_NAT_SEQ_ADJ_REPLY]);
1338 if (ret < 0)
1339 return ret;
1340
1341 ct->status |= IPS_SEQ_ADJUST;
1342 }
1343
1344 return 0;
1345}
1346#endif
1347
c1d10adb 1348static int
39938324
PM		 1349ctnetlink_change_conntrack(struct nf_conn *ct,
1350 const struct nlattr * const cda[])
c1d10adb
PNA		 1351{
1352 int err;
1353
e098360f
PNA		 1354 /* only allow NAT changes and master assignation for new conntracks */
1355 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1356 return -EOPNOTSUPP;
1357
df6fb868 1358 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1359 err = ctnetlink_change_helper(ct, cda);
1360 if (err < 0)
1361 return err;
1362 }
1363
df6fb868 1364 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1365 err = ctnetlink_change_timeout(ct, cda);
1366 if (err < 0)
1367 return err;
1368 }
1369
df6fb868 1370 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1371 err = ctnetlink_change_status(ct, cda);
1372 if (err < 0)
1373 return err;
1374 }
1375
df6fb868 1376 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1377 err = ctnetlink_change_protoinfo(ct, cda);
1378 if (err < 0)
1379 return err;
1380 }
1381
bcd1e830 1382#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1383 if (cda[CTA_MARK])
77236b6e 1384 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1385#endif
1386
13eae15a
PNA		 1387#ifdef CONFIG_NF_NAT_NEEDED
1388 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1389 err = ctnetlink_change_nat_seq_adj(ct, cda);
1390 if (err < 0)
1391 return err;
1392 }
1393#endif
1394
c1d10adb
PNA		 1395 return 0;
1396}
1397
f0a3c086 1398static struct nf_conn *
ef00f89f 1399ctnetlink_create_conntrack(struct net *net, u16 zone,
9592a5c0 1400 const struct nlattr * const cda[],
c1d10adb 1401 struct nf_conntrack_tuple *otuple,
5faa1f4c 1402 struct nf_conntrack_tuple *rtuple,
7ec47496 1403 u8 u3)
c1d10adb
PNA		 1404{
1405 struct nf_conn *ct;
1406 int err = -EINVAL;
ceceae1b 1407 struct nf_conntrack_helper *helper;
315c34da 1408 struct nf_conn_tstamp *tstamp;
c1d10adb 1409
ef00f89f 1410 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1411 if (IS_ERR(ct))
f0a3c086 1412 return ERR_PTR(-ENOMEM);
c1d10adb 1413
df6fb868 1414 if (!cda[CTA_TIMEOUT])
0f5b3e85 1415 goto err1;
77236b6e 1416 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
c1d10adb
PNA		 1417
1418 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
c1d10adb 1419
1575e7ea 1420 rcu_read_lock();
226c0c0e 1421 if (cda[CTA_HELP]) {
29fe1b48 1422 char *helpname = NULL;
ae243bee
PNA		 1423 struct nlattr *helpinfo = NULL;
1424
1425 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1426 if (err < 0)
1427 goto err2;
226c0c0e 1428
794e6871
PM		 1429 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1430 nf_ct_protonum(ct));
226c0c0e
PNA		 1431 if (helper == NULL) {
1432 rcu_read_unlock();
1433#ifdef CONFIG_MODULES
1434 if (request_module("nfct-helper-%s", helpname) < 0) {
1435 err = -EOPNOTSUPP;
0f5b3e85 1436 goto err1;
226c0c0e
PNA		 1437 }
1438
1439 rcu_read_lock();
794e6871
PM		 1440 helper = __nf_conntrack_helper_find(helpname,
1441 nf_ct_l3num(ct),
1442 nf_ct_protonum(ct));
226c0c0e 1443 if (helper) {
226c0c0e 1444 err = -EAGAIN;
0f5b3e85 1445 goto err2;
226c0c0e
PNA		 1446 }
1447 rcu_read_unlock();
1448#endif
1449 err = -EOPNOTSUPP;
0f5b3e85 1450 goto err1;
226c0c0e
PNA		 1451 } else {
1452 struct nf_conn_help *help;
1453
1afc5679 1454 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1455 if (help == NULL) {
226c0c0e 1456 err = -ENOMEM;
0f5b3e85 1457 goto err2;
226c0c0e 1458 }
ae243bee
PNA		 1459 /* set private helper data if allowed. */
1460 if (helper->from_nlattr && helpinfo)
1461 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1462
1463 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1464 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1465 }
1466 } else {
1467 /* try an implicit helper assignation */
b2a15a60 1468 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1469 if (err < 0)
1470 goto err2;
1575e7ea
PNA		 1471 }
1472
a88e22ad
PNA		 1473 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
1474 err = ctnetlink_change_nat(ct, cda);
0f5b3e85
PM		 1475 if (err < 0)
1476 goto err2;
e6a7d3c0
PNA		 1477 }
1478
a88e22ad 1479 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1480 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad
PNA		 1481 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
1482 /* we must add conntrack extensions before confirmation. */
1483 ct->status |= IPS_CONFIRMED;
1484
1485 if (cda[CTA_STATUS]) {
1486 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1487 if (err < 0)
1488 goto err2;
bbb3357d 1489 }
c1d10adb 1490
c969aa7d
PNA		 1491#ifdef CONFIG_NF_NAT_NEEDED
1492 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1493 err = ctnetlink_change_nat_seq_adj(ct, cda);
0f5b3e85
PM		 1494 if (err < 0)
1495 goto err2;
c969aa7d
PNA		 1496 }
1497#endif
1498
e5fc9e7a 1499 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 1500 if (cda[CTA_PROTOINFO]) {
c1d10adb 1501 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 1502 if (err < 0)
1503 goto err2;
c1d10adb
PNA		 1504 }
1505
bcd1e830 1506#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1507 if (cda[CTA_MARK])
77236b6e 1508 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1509#endif
1510
5faa1f4c 1511 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 1512 if (cda[CTA_TUPLE_MASTER]) {
1513 struct nf_conntrack_tuple master;
1514 struct nf_conntrack_tuple_hash *master_h;
1515 struct nf_conn *master_ct;
1516
1517 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
1518 if (err < 0)
0f5b3e85 1519 goto err2;
7ec47496 1520
ef00f89f 1521 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 1522 if (master_h == NULL) {
1523 err = -ENOENT;
0f5b3e85 1524 goto err2;
7ec47496
PNA		 1525 }
1526 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 1527 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 1528 ct->master = master_ct;
f2a89004 1529 }
315c34da
PNA		 1530 tstamp = nf_conn_tstamp_find(ct);
1531 if (tstamp)
1532 tstamp->start = ktime_to_ns(ktime_get_real());
5faa1f4c 1533
7d367e06
JK		 1534 err = nf_conntrack_hash_check_insert(ct);
1535 if (err < 0)
1536 goto err2;
1537
58a3c9bb 1538 rcu_read_unlock();
dafc741c 1539
f0a3c086 1540 return ct;
c1d10adb 1541
0f5b3e85
PM		 1542err2:
1543 rcu_read_unlock();
1544err1:
c1d10adb 1545 nf_conntrack_free(ct);
f0a3c086 1546 return ERR_PTR(err);
c1d10adb
PNA		 1547}
1548
601e68e1
YH		 1549static int
1550ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1551 const struct nlmsghdr *nlh,
1552 const struct nlattr * const cda[])
c1d10adb 1553{
9592a5c0 1554 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1555 struct nf_conntrack_tuple otuple, rtuple;
1556 struct nf_conntrack_tuple_hash *h = NULL;
96bcf938 1557 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
7d367e06 1558 struct nf_conn *ct;
c1d10adb 1559 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1560 u16 zone;
1561 int err;
1562
1563 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1564 if (err < 0)
1565 return err;
c1d10adb 1566
df6fb868 1567 if (cda[CTA_TUPLE_ORIG]) {
c1d10adb
PNA		 1568 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3);
1569 if (err < 0)
1570 return err;
1571 }
1572
df6fb868 1573 if (cda[CTA_TUPLE_REPLY]) {
c1d10adb
PNA		 1574 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3);
1575 if (err < 0)
1576 return err;
1577 }
1578
df6fb868 1579 if (cda[CTA_TUPLE_ORIG])
7d367e06 1580 h = nf_conntrack_find_get(net, zone, &otuple);
df6fb868 1581 else if (cda[CTA_TUPLE_REPLY])
7d367e06 1582 h = nf_conntrack_find_get(net, zone, &rtuple);
c1d10adb
PNA		 1583
1584 if (h == NULL) {
c1d10adb 1585 err = -ENOENT;
f0a3c086 1586 if (nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 1587 enum ip_conntrack_events events;
5faa1f4c 1588
ef00f89f 1589 ct = ctnetlink_create_conntrack(net, zone, cda, &otuple,
f0a3c086 1590 &rtuple, u3);
7d367e06
JK		 1591 if (IS_ERR(ct))
1592 return PTR_ERR(ct);
1593
f0a3c086 1594 err = 0;
fecc1133
PNA		 1595 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1596 events = IPCT_RELATED;
1597 else
1598 events = IPCT_NEW;
1599
858b3133
PM		 1600 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1601 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1602 (1 << IPCT_HELPER) |
1603 (1 << IPCT_PROTOINFO) |
1604 (1 << IPCT_NATSEQADJ) |
1605 (1 << IPCT_MARK) | events,
1606 ct, NETLINK_CB(skb).pid,
1607 nlmsg_report(nlh));
f0a3c086 1608 nf_ct_put(ct);
7d367e06 1609 }
5faa1f4c 1610
c1d10adb
PNA		 1611 return err;
1612 }
1613 /* implicit 'else' */
1614
c1d10adb 1615 err = -EEXIST;
7d367e06 1616 ct = nf_ct_tuplehash_to_ctrack(h);
ff4ca827 1617 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
7d367e06 1618 spin_lock_bh(&nf_conntrack_lock);
19abb7b0 1619 err = ctnetlink_change_conntrack(ct, cda);
7d367e06 1620 spin_unlock_bh(&nf_conntrack_lock);
19abb7b0 1621 if (err == 0) {
858b3133
PM		 1622 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1623 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1624 (1 << IPCT_HELPER) |
1625 (1 << IPCT_PROTOINFO) |
1626 (1 << IPCT_NATSEQADJ) |
1627 (1 << IPCT_MARK),
1628 ct, NETLINK_CB(skb).pid,
1629 nlmsg_report(nlh));
7d367e06 1630 }
ff4ca827 1631 }
c1d10adb 1632
7d367e06 1633 nf_ct_put(ct);
c1d10adb
PNA		 1634 return err;
1635}
1636
9cb01766
PNA		 1637#if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \
1638 defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE)
1639static size_t
1640ctnetlink_nfqueue_build_size(const struct nf_conn *ct)
1641{
1642 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
1643 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
1644 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
1645 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
1646 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
1647 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
1648 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
1649 + nla_total_size(0) /* CTA_PROTOINFO */
1650 + nla_total_size(0) /* CTA_HELP */
1651 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
1652 + ctnetlink_secctx_size(ct)
1653#ifdef CONFIG_NF_NAT_NEEDED
1654 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
1655 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
1656#endif
1657#ifdef CONFIG_NF_CONNTRACK_MARK
1658 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
1659#endif
1660 + ctnetlink_proto_size(ct)
1661 ;
1662}
1663
1664static int
1665ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
1666{
1667 struct nlattr *nest_parms;
1668
1669 rcu_read_lock();
1670 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
1671 if (!nest_parms)
1672 goto nla_put_failure;
1673 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
1674 goto nla_put_failure;
1675 nla_nest_end(skb, nest_parms);
1676
1677 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
1678 if (!nest_parms)
1679 goto nla_put_failure;
1680 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
1681 goto nla_put_failure;
1682 nla_nest_end(skb, nest_parms);
1683
1684 if (nf_ct_zone(ct)) {
1685 if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
1686 goto nla_put_failure;
1687 }
1688
1689 if (ctnetlink_dump_id(skb, ct) < 0)
1690 goto nla_put_failure;
1691
1692 if (ctnetlink_dump_status(skb, ct) < 0)
1693 goto nla_put_failure;
1694
1695 if (ctnetlink_dump_timeout(skb, ct) < 0)
1696 goto nla_put_failure;
1697
1698 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
1699 goto nla_put_failure;
1700
1701 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
1702 goto nla_put_failure;
1703
1704#ifdef CONFIG_NF_CONNTRACK_SECMARK
1705 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
1706 goto nla_put_failure;
1707#endif
1708 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
1709 goto nla_put_failure;
1710
1711 if ((ct->status & IPS_SEQ_ADJUST) &&
1712 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
1713 goto nla_put_failure;
1714
1715#ifdef CONFIG_NF_CONNTRACK_MARK
1716 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
1717 goto nla_put_failure;
1718#endif
1719 rcu_read_unlock();
1720 return 0;
1721
1722nla_put_failure:
1723 rcu_read_unlock();
1724 return -ENOSPC;
1725}
1726
1727static int
1728ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
1729{
1730 int err;
1731
1732 if (cda[CTA_TIMEOUT]) {
1733 err = ctnetlink_change_timeout(ct, cda);
1734 if (err < 0)
1735 return err;
1736 }
1737 if (cda[CTA_STATUS]) {
1738 err = ctnetlink_change_status(ct, cda);
1739 if (err < 0)
1740 return err;
1741 }
1742 if (cda[CTA_HELP]) {
1743 err = ctnetlink_change_helper(ct, cda);
1744 if (err < 0)
1745 return err;
1746 }
1747#if defined(CONFIG_NF_CONNTRACK_MARK)
1748 if (cda[CTA_MARK])
1749 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1750#endif
1751 return 0;
1752}
1753
1754static int
1755ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct)
1756{
1757 struct nlattr *cda[CTA_MAX+1];
1758
1759 nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
1760
1761 return ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct);
1762}
1763
1764static struct nfq_ct_hook ctnetlink_nfqueue_hook = {
1765 .build_size = ctnetlink_nfqueue_build_size,
1766 .build = ctnetlink_nfqueue_build,
1767 .parse = ctnetlink_nfqueue_parse,
8c88f87c
PNA		 1768#ifdef CONFIG_NF_NAT_NEEDED
1769 .seq_adjust = nf_nat_tcp_seq_adjust,
1770#endif
9cb01766
PNA		 1771};
1772#endif /* CONFIG_NETFILTER_NETLINK_QUEUE */
1773
601e68e1
YH		 1774/***********************************************************************
1775 * EXPECT
1776 ***********************************************************************/
c1d10adb
PNA		 1777
1778static inline int
1779ctnetlink_exp_dump_tuple(struct sk_buff *skb,
1780 const struct nf_conntrack_tuple *tuple,
1781 enum ctattr_expect type)
1782{
df6fb868 1783 struct nlattr *nest_parms;
601e68e1 1784
df6fb868
PM		 1785 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
1786 if (!nest_parms)
1787 goto nla_put_failure;
c1d10adb 1788 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 1789 goto nla_put_failure;
1790 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 1791
1792 return 0;
1793
df6fb868 1794nla_put_failure:
c1d10adb 1795 return -1;
601e68e1 1796}
c1d10adb 1797
1cde6436
PNA		 1798static inline int
1799ctnetlink_exp_dump_mask(struct sk_buff *skb,
1800 const struct nf_conntrack_tuple *tuple,
d4156e8c 1801 const struct nf_conntrack_tuple_mask *mask)
1cde6436
PNA		 1802{
1803 int ret;
1804 struct nf_conntrack_l3proto *l3proto;
605dcad6 1805 struct nf_conntrack_l4proto *l4proto;
d4156e8c 1806 struct nf_conntrack_tuple m;
df6fb868 1807 struct nlattr *nest_parms;
d4156e8c
PM		 1808
1809 memset(&m, 0xFF, sizeof(m));
d4156e8c 1810 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 1811 m.src.u.all = mask->src.u.all;
1812 m.dst.protonum = tuple->dst.protonum;
d4156e8c 1813
df6fb868
PM		 1814 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
1815 if (!nest_parms)
1816 goto nla_put_failure;
1cde6436 1817
3b988ece 1818 rcu_read_lock();
528a3a6f 1819 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 1820 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 1821 if (ret >= 0) {
1822 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
1823 tuple->dst.protonum);
d4156e8c 1824 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 1825 }
1826 rcu_read_unlock();
1827
1cde6436 1828 if (unlikely(ret < 0))
df6fb868 1829 goto nla_put_failure;
1cde6436 1830
df6fb868 1831 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 1832
1833 return 0;
1834
df6fb868 1835nla_put_failure:
1cde6436
PNA		 1836 return -1;
1837}
1838
bb5cf80e 1839static int
c1d10adb 1840ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 1841 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 1842{
1843 struct nf_conn *master = exp->master;
c1216382 1844 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 1845 struct nf_conn_help *help;
076a0ca0
PNA		 1846#ifdef CONFIG_NF_NAT_NEEDED
1847 struct nlattr *nest_parms;
1848 struct nf_conntrack_tuple nat_tuple = {};
1849#endif
544d5c7d
PNA		 1850 struct nf_ct_helper_expectfn *expfn;
1851
d978e5da
PM		 1852 if (timeout < 0)
1853 timeout = 0;
c1d10adb
PNA		 1854
1855 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 1856 goto nla_put_failure;
1cde6436 1857 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 1858 goto nla_put_failure;
c1d10adb
PNA		 1859 if (ctnetlink_exp_dump_tuple(skb,
1860 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
1861 CTA_EXPECT_MASTER) < 0)
df6fb868 1862 goto nla_put_failure;
601e68e1 1863
076a0ca0
PNA		 1864#ifdef CONFIG_NF_NAT_NEEDED
1865 if (exp->saved_ip || exp->saved_proto.all) {
1866 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
1867 if (!nest_parms)
1868 goto nla_put_failure;
1869
cc1eb431
DM		 1870 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
1871 goto nla_put_failure;
076a0ca0
PNA		 1872
1873 nat_tuple.src.l3num = nf_ct_l3num(master);
1874 nat_tuple.src.u3.ip = exp->saved_ip;
1875 nat_tuple.dst.protonum = nf_ct_protonum(master);
1876 nat_tuple.src.u = exp->saved_proto;
1877
1878 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
1879 CTA_EXPECT_NAT_TUPLE) < 0)
1880 goto nla_put_failure;
1881 nla_nest_end(skb, nest_parms);
1882 }
1883#endif
cc1eb431
DM		 1884 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
1885 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
1886 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
1887 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
1888 goto nla_put_failure;
bc01befd
PNA		 1889 help = nfct_help(master);
1890 if (help) {
1891 struct nf_conntrack_helper *helper;
1892
1893 helper = rcu_dereference(help->helper);
cc1eb431
DM		 1894 if (helper &&
1895 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
1896 goto nla_put_failure;
bc01befd 1897 }
544d5c7d 1898 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 1899 if (expfn != NULL &&
1900 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
1901 goto nla_put_failure;
c1d10adb
PNA		 1902
1903 return 0;
601e68e1 1904
df6fb868 1905nla_put_failure:
c1d10adb
PNA		 1906 return -1;
1907}
1908
1909static int
1910ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
8b0a231d 1911 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 1912{
1913 struct nlmsghdr *nlh;
1914 struct nfgenmsg *nfmsg;
96bcf938 1915 unsigned int flags = pid ? NLM_F_MULTI : 0;
c1d10adb
PNA		 1916
1917 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
96bcf938
PNA		 1918 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
1919 if (nlh == NULL)
1920 goto nlmsg_failure;
c1d10adb 1921
96bcf938 1922 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 1923 nfmsg->nfgen_family = exp->tuple.src.l3num;
1924 nfmsg->version = NFNETLINK_V0;
1925 nfmsg->res_id = 0;
1926
1927 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 1928 goto nla_put_failure;
c1d10adb 1929
96bcf938 1930 nlmsg_end(skb, nlh);
c1d10adb
PNA		 1931 return skb->len;
1932
1933nlmsg_failure:
df6fb868 1934nla_put_failure:
96bcf938 1935 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 1936 return -1;
1937}
1938
1939#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 1940static int
1941ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 1942{
9592a5c0
AD		 1943 struct nf_conntrack_expect *exp = item->exp;
1944 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 1945 struct nlmsghdr *nlh;
1946 struct nfgenmsg *nfmsg;
c1d10adb 1947 struct sk_buff *skb;
ebbf41df 1948 unsigned int type, group;
c1d10adb
PNA		 1949 int flags = 0;
1950
ebbf41df
PNA		 1951 if (events & (1 << IPEXP_DESTROY)) {
1952 type = IPCTNL_MSG_EXP_DELETE;
1953 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
1954 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 1955 type = IPCTNL_MSG_EXP_NEW;
1956 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 1957 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 1958 } else
e34d5c1a 1959 return 0;
c1d10adb 1960
ebbf41df 1961 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 1962 return 0;
b3a27bfb 1963
96bcf938
PNA		 1964 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1965 if (skb == NULL)
150ace0d 1966 goto errout;
c1d10adb 1967
b633ad5f 1968 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
96bcf938
PNA		 1969 nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags);
1970 if (nlh == NULL)
1971 goto nlmsg_failure;
c1d10adb 1972
96bcf938 1973 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 1974 nfmsg->nfgen_family = exp->tuple.src.l3num;
1975 nfmsg->version = NFNETLINK_V0;
1976 nfmsg->res_id = 0;
1977
528a3a6f 1978 rcu_read_lock();
c1d10adb 1979 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 1980 goto nla_put_failure;
528a3a6f 1981 rcu_read_unlock();
c1d10adb 1982
96bcf938 1983 nlmsg_end(skb, nlh);
ebbf41df 1984 nfnetlink_send(skb, net, item->pid, group, item->report, GFP_ATOMIC);
e34d5c1a 1985 return 0;
c1d10adb 1986
df6fb868 1987nla_put_failure:
528a3a6f 1988 rcu_read_unlock();
96bcf938 1989 nlmsg_cancel(skb, nlh);
528a3a6f 1990nlmsg_failure:
c1d10adb 1991 kfree_skb(skb);
150ace0d 1992errout:
9592a5c0 1993 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 1994 return 0;
c1d10adb
PNA		 1995}
1996#endif
cf6994c2
PM		 1997static int ctnetlink_exp_done(struct netlink_callback *cb)
1998{
31f15875
PM		 1999 if (cb->args[1])
2000 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2001 return 0;
2002}
c1d10adb
PNA		 2003
2004static int
2005ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2006{
9592a5c0 2007 struct net *net = sock_net(skb->sk);
cf6994c2 2008 struct nf_conntrack_expect *exp, *last;
96bcf938 2009 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
31f15875 2010 struct hlist_node *n;
87711cb8 2011 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2012
7d0742da 2013 rcu_read_lock();
31f15875
PM		 2014 last = (struct nf_conntrack_expect *)cb->args[1];
2015 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2016restart:
9b03f38d 2017 hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]],
31f15875
PM		 2018 hnode) {
2019 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2020 continue;
31f15875
PM		 2021 if (cb->args[1]) {
2022 if (exp != last)
2023 continue;
2024 cb->args[1] = 0;
2025 }
8b0a231d
PNA		 2026 if (ctnetlink_exp_fill_info(skb,
2027 NETLINK_CB(cb->skb).pid,
31f15875
PM		 2028 cb->nlh->nlmsg_seq,
2029 IPCTNL_MSG_EXP_NEW,
8b0a231d 2030 exp) < 0) {
7d0742da
PM		 2031 if (!atomic_inc_not_zero(&exp->use))
2032 continue;
31f15875
PM		 2033 cb->args[1] = (unsigned long)exp;
2034 goto out;
2035 }
cf6994c2 2036 }
31f15875
PM		 2037 if (cb->args[1]) {
2038 cb->args[1] = 0;
2039 goto restart;
cf6994c2
PM		 2040 }
2041 }
601e68e1 2042out:
7d0742da 2043 rcu_read_unlock();
cf6994c2
PM		 2044 if (last)
2045 nf_ct_expect_put(last);
c1d10adb 2046
c1d10adb
PNA		 2047 return skb->len;
2048}
2049
f73e924c 2050static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
d0b0268f
PM		 2051 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2052 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2053 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
f73e924c
PM		 2054 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2055 [CTA_EXPECT_ID] = { .type = NLA_U32 },
d0b0268f 2056 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING },
bcac0dfa 2057 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
8b008faf 2058 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
b8c5e52c 2059 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
076a0ca0 2060 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
544d5c7d 2061 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
c1d10adb
PNA		 2062};
2063
2064static int
601e68e1 2065ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2066 const struct nlmsghdr *nlh,
2067 const struct nlattr * const cda[])
c1d10adb 2068{
9592a5c0 2069 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2070 struct nf_conntrack_tuple tuple;
2071 struct nf_conntrack_expect *exp;
2072 struct sk_buff *skb2;
96bcf938 2073 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2074 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2075 u16 zone;
2076 int err;
c1d10adb 2077
b8f3ab42 2078 if (nlh->nlmsg_flags & NLM_F_DUMP) {
80d326fa
PNA		 2079 struct netlink_dump_control c = {
2080 .dump = ctnetlink_exp_dump_table,
2081 .done = ctnetlink_exp_done,
2082 };
2083 return netlink_dump_start(ctnl, skb, nlh, &c);
c1d10adb
PNA		 2084 }
2085
ef00f89f
PM		 2086 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2087 if (err < 0)
2088 return err;
2089
35dba1d7
PNA		 2090 if (cda[CTA_EXPECT_TUPLE])
2091 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2092 else if (cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2093 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2094 else
2095 return -EINVAL;
2096
2097 if (err < 0)
2098 return err;
2099
ef00f89f 2100 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2101 if (!exp)
2102 return -ENOENT;
2103
df6fb868 2104 if (cda[CTA_EXPECT_ID]) {
77236b6e 2105 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2106 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2107 nf_ct_expect_put(exp);
c1d10adb
PNA		 2108 return -ENOENT;
2109 }
601e68e1 2110 }
c1d10adb
PNA		 2111
2112 err = -ENOMEM;
96bcf938 2113 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2114 if (skb2 == NULL) {
2115 nf_ct_expect_put(exp);
c1d10adb 2116 goto out;
81378f72 2117 }
4e9b8269 2118
528a3a6f 2119 rcu_read_lock();
601e68e1 2120 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid,
8b0a231d 2121 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2122 rcu_read_unlock();
81378f72 2123 nf_ct_expect_put(exp);
c1d10adb
PNA		 2124 if (err <= 0)
2125 goto free;
2126
81378f72
PNA		 2127 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
2128 if (err < 0)
2129 goto out;
c1d10adb 2130
81378f72 2131 return 0;
c1d10adb
PNA		 2132
2133free:
2134 kfree_skb(skb2);
2135out:
81378f72
PNA		 2136 /* this avoids a loop in nfnetlink. */
2137 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2138}
2139
2140static int
601e68e1 2141ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2142 const struct nlmsghdr *nlh,
2143 const struct nlattr * const cda[])
c1d10adb 2144{
9592a5c0 2145 struct net *net = sock_net(ctnl);
31f15875 2146 struct nf_conntrack_expect *exp;
c1d10adb 2147 struct nf_conntrack_tuple tuple;
96bcf938 2148 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
31f15875 2149 struct hlist_node *n, *next;
c1d10adb 2150 u_int8_t u3 = nfmsg->nfgen_family;
31f15875 2151 unsigned int i;
ef00f89f 2152 u16 zone;
c1d10adb
PNA		 2153 int err;
2154
df6fb868 2155 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2156 /* delete a single expect by tuple */
ef00f89f
PM		 2157 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2158 if (err < 0)
2159 return err;
2160
c1d10adb
PNA		 2161 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2162 if (err < 0)
2163 return err;
2164
2165 /* bump usage count to 2 */
ef00f89f 2166 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2167 if (!exp)
2168 return -ENOENT;
2169
df6fb868 2170 if (cda[CTA_EXPECT_ID]) {
77236b6e 2171 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2172 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2173 nf_ct_expect_put(exp);
c1d10adb
PNA		 2174 return -ENOENT;
2175 }
2176 }
2177
2178 /* after list removal, usage count == 1 */
ebbf41df
PNA		 2179 spin_lock_bh(&nf_conntrack_lock);
2180 if (del_timer(&exp->timeout)) {
2181 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).pid,
2182 nlmsg_report(nlh));
2183 nf_ct_expect_put(exp);
2184 }
2185 spin_unlock_bh(&nf_conntrack_lock);
601e68e1 2186 /* have to put what we 'get' above.
c1d10adb 2187 * after this line usage count == 0 */
6823645d 2188 nf_ct_expect_put(exp);
df6fb868
PM		 2189 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2190 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
31f15875 2191 struct nf_conn_help *m_help;
c1d10adb
PNA		 2192
2193 /* delete all expectations for this helper */
f8ba1aff 2194 spin_lock_bh(&nf_conntrack_lock);
31f15875
PM		 2195 for (i = 0; i < nf_ct_expect_hsize; i++) {
2196 hlist_for_each_entry_safe(exp, n, next,
9592a5c0 2197 &net->ct.expect_hash[i],
31f15875
PM		 2198 hnode) {
2199 m_help = nfct_help(exp->master);
794e6871
PM		 2200 if (!strcmp(m_help->helper->name, name) &&
2201 del_timer(&exp->timeout)) {
ebbf41df
PNA		 2202 nf_ct_unlink_expect_report(exp,
2203 NETLINK_CB(skb).pid,
2204 nlmsg_report(nlh));
31f15875
PM		 2205 nf_ct_expect_put(exp);
2206 }
c1d10adb
PNA		 2207 }
2208 }
f8ba1aff 2209 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2210 } else {
2211 /* This basically means we have to flush everything*/
f8ba1aff 2212 spin_lock_bh(&nf_conntrack_lock);
31f15875
PM		 2213 for (i = 0; i < nf_ct_expect_hsize; i++) {
2214 hlist_for_each_entry_safe(exp, n, next,
9592a5c0 2215 &net->ct.expect_hash[i],
31f15875
PM		 2216 hnode) {
2217 if (del_timer(&exp->timeout)) {
ebbf41df
PNA		 2218 nf_ct_unlink_expect_report(exp,
2219 NETLINK_CB(skb).pid,
2220 nlmsg_report(nlh));
31f15875
PM		 2221 nf_ct_expect_put(exp);
2222 }
c1d10adb
PNA		 2223 }
2224 }
f8ba1aff 2225 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2226 }
2227
2228 return 0;
2229}
2230static int
39938324
PM		 2231ctnetlink_change_expect(struct nf_conntrack_expect *x,
2232 const struct nlattr * const cda[])
c1d10adb 2233{
9768e1ac
KW		 2234 if (cda[CTA_EXPECT_TIMEOUT]) {
2235 if (!del_timer(&x->timeout))
2236 return -ETIME;
2237
2238 x->timeout.expires = jiffies +
2239 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2240 add_timer(&x->timeout);
2241 }
2242 return 0;
c1d10adb
PNA		 2243}
2244
076a0ca0
PNA		 2245static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2246 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2247 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2248};
2249
2250static int
2251ctnetlink_parse_expect_nat(const struct nlattr *attr,
2252 struct nf_conntrack_expect *exp,
2253 u_int8_t u3)
2254{
2255#ifdef CONFIG_NF_NAT_NEEDED
2256 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2257 struct nf_conntrack_tuple nat_tuple = {};
2258 int err;
2259
2260 nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2261
2262 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2263 return -EINVAL;
2264
2265 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2266 &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3);
2267 if (err < 0)
2268 return err;
2269
2270 exp->saved_ip = nat_tuple.src.u3.ip;
2271 exp->saved_proto = nat_tuple.src.u;
2272 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2273
2274 return 0;
2275#else
2276 return -EOPNOTSUPP;
2277#endif
2278}
2279
c1d10adb 2280static int
ef00f89f
PM		 2281ctnetlink_create_expect(struct net *net, u16 zone,
2282 const struct nlattr * const cda[],
9592a5c0 2283 u_int8_t u3,
39938324 2284 u32 pid, int report)
c1d10adb
PNA		 2285{
2286 struct nf_conntrack_tuple tuple, mask, master_tuple;
2287 struct nf_conntrack_tuple_hash *h = NULL;
2288 struct nf_conntrack_expect *exp;
2289 struct nf_conn *ct;
dc808fe2 2290 struct nf_conn_help *help;
660fdb2a 2291 struct nf_conntrack_helper *helper = NULL;
b8c5e52c 2292 u_int32_t class = 0;
c1d10adb
PNA		 2293 int err = 0;
2294
c1d10adb
PNA		 2295 /* caller guarantees that those three CTA_EXPECT_* exist */
2296 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2297 if (err < 0)
2298 return err;
2299 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
2300 if (err < 0)
2301 return err;
2302 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
2303 if (err < 0)
2304 return err;
2305
2306 /* Look for master conntrack of this expectation */
ef00f89f 2307 h = nf_conntrack_find_get(net, zone, &master_tuple);
c1d10adb
PNA		 2308 if (!h)
2309 return -ENOENT;
2310 ct = nf_ct_tuplehash_to_ctrack(h);
660fdb2a
PNA		 2311
2312 /* Look for helper of this expectation */
2313 if (cda[CTA_EXPECT_HELP_NAME]) {
2314 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2315
2316 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2317 nf_ct_protonum(ct));
2318 if (helper == NULL) {
2319#ifdef CONFIG_MODULES
2320 if (request_module("nfct-helper-%s", helpname) < 0) {
2321 err = -EOPNOTSUPP;
2322 goto out;
2323 }
2324
2325 helper = __nf_conntrack_helper_find(helpname,
2326 nf_ct_l3num(ct),
2327 nf_ct_protonum(ct));
2328 if (helper) {
2329 err = -EAGAIN;
2330 goto out;
2331 }
2332#endif
2333 err = -EOPNOTSUPP;
2334 goto out;
2335 }
2336 }
2337
b8c5e52c
PNA		 2338 if (cda[CTA_EXPECT_CLASS] && helper) {
2339 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
2340 if (class > helper->expect_class_max) {
2341 err = -EINVAL;
2342 goto out;
2343 }
2344 }
6823645d 2345 exp = nf_ct_expect_alloc(ct);
c1d10adb
PNA		 2346 if (!exp) {
2347 err = -ENOMEM;
2348 goto out;
2349 }
bc01befd
PNA		 2350 help = nfct_help(ct);
2351 if (!help) {
2352 if (!cda[CTA_EXPECT_TIMEOUT]) {
2353 err = -EINVAL;
2354 goto out;
2355 }
2356 exp->timeout.expires =
2357 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
601e68e1 2358
bc01befd
PNA		 2359 exp->flags = NF_CT_EXPECT_USERSPACE;
2360 if (cda[CTA_EXPECT_FLAGS]) {
2361 exp->flags |=
2362 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2363 }
2364 } else {
2365 if (cda[CTA_EXPECT_FLAGS]) {
2366 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2367 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
2368 } else
2369 exp->flags = 0;
2370 }
544d5c7d
PNA		 2371 if (cda[CTA_EXPECT_FN]) {
2372 const char *name = nla_data(cda[CTA_EXPECT_FN]);
2373 struct nf_ct_helper_expectfn *expfn;
2374
2375 expfn = nf_ct_helper_expectfn_find_by_name(name);
2376 if (expfn == NULL) {
2377 err = -EINVAL;
2378 goto err_out;
2379 }
2380 exp->expectfn = expfn->expectfn;
2381 } else
2382 exp->expectfn = NULL;
601e68e1 2383
b8c5e52c 2384 exp->class = class;
c1d10adb 2385 exp->master = ct;
660fdb2a 2386 exp->helper = helper;
c1d10adb 2387 memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
d4156e8c
PM		 2388 memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
2389 exp->mask.src.u.all = mask.src.u.all;
c1d10adb 2390
076a0ca0
PNA		 2391 if (cda[CTA_EXPECT_NAT]) {
2392 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
2393 exp, u3);
2394 if (err < 0)
2395 goto err_out;
2396 }
19abb7b0 2397 err = nf_ct_expect_related_report(exp, pid, report);
076a0ca0 2398err_out:
6823645d 2399 nf_ct_expect_put(exp);
601e68e1 2400out:
c1d10adb
PNA		 2401 nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
2402 return err;
2403}
2404
2405static int
2406ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2407 const struct nlmsghdr *nlh,
2408 const struct nlattr * const cda[])
c1d10adb 2409{
9592a5c0 2410 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2411 struct nf_conntrack_tuple tuple;
2412 struct nf_conntrack_expect *exp;
96bcf938 2413 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2414 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2415 u16 zone;
2416 int err;
c1d10adb 2417
df6fb868
PM		 2418 if (!cda[CTA_EXPECT_TUPLE]
2419 || !cda[CTA_EXPECT_MASK]
2420 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2421 return -EINVAL;
2422
ef00f89f
PM		 2423 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2424 if (err < 0)
2425 return err;
2426
c1d10adb
PNA		 2427 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2428 if (err < 0)
2429 return err;
2430
f8ba1aff 2431 spin_lock_bh(&nf_conntrack_lock);
ef00f89f 2432 exp = __nf_ct_expect_find(net, zone, &tuple);
c1d10adb
PNA		 2433
2434 if (!exp) {
f8ba1aff 2435 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2436 err = -ENOENT;
19abb7b0 2437 if (nlh->nlmsg_flags & NLM_F_CREATE) {
ef00f89f 2438 err = ctnetlink_create_expect(net, zone, cda,
19abb7b0
PNA		 2439 u3,
2440 NETLINK_CB(skb).pid,
2441 nlmsg_report(nlh));
2442 }
c1d10adb
PNA		 2443 return err;
2444 }
2445
2446 err = -EEXIST;
2447 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
2448 err = ctnetlink_change_expect(exp, cda);
f8ba1aff 2449 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2450
c1d10adb
PNA		 2451 return err;
2452}
2453
2454#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2455static struct nf_ct_event_notifier ctnl_notifier = {
2456 .fcn = ctnetlink_conntrack_event,
c1d10adb
PNA		 2457};
2458
e34d5c1a
PNA		 2459static struct nf_exp_event_notifier ctnl_notifier_exp = {
2460 .fcn = ctnetlink_expect_event,
c1d10adb
PNA		 2461};
2462#endif
2463
7c8d4cb4 2464static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
c1d10adb 2465 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
f73e924c
PM		 2466 .attr_count = CTA_MAX,
2467 .policy = ct_nla_policy },
c1d10adb 2468 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 2469 .attr_count = CTA_MAX,
2470 .policy = ct_nla_policy },
c1d10adb 2471 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
f73e924c
PM		 2472 .attr_count = CTA_MAX,
2473 .policy = ct_nla_policy },
c1d10adb 2474 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 2475 .attr_count = CTA_MAX,
2476 .policy = ct_nla_policy },
c1d10adb
PNA		 2477};
2478
7c8d4cb4 2479static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
c1d10adb 2480 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
f73e924c
PM		 2481 .attr_count = CTA_EXPECT_MAX,
2482 .policy = exp_nla_policy },
c1d10adb 2483 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
f73e924c
PM		 2484 .attr_count = CTA_EXPECT_MAX,
2485 .policy = exp_nla_policy },
c1d10adb 2486 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
f73e924c
PM		 2487 .attr_count = CTA_EXPECT_MAX,
2488 .policy = exp_nla_policy },
c1d10adb
PNA		 2489};
2490
7c8d4cb4 2491static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 2492 .name = "conntrack",
2493 .subsys_id = NFNL_SUBSYS_CTNETLINK,
2494 .cb_count = IPCTNL_MSG_MAX,
2495 .cb = ctnl_cb,
2496};
2497
7c8d4cb4 2498static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 2499 .name = "conntrack_expect",
2500 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
2501 .cb_count = IPCTNL_MSG_EXP_MAX,
2502 .cb = ctnl_exp_cb,
2503};
2504
d2483dde 2505MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 2506MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 2507MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 2508
70e9942f
PNA		 2509static int __net_init ctnetlink_net_init(struct net *net)
2510{
2511#ifdef CONFIG_NF_CONNTRACK_EVENTS
2512 int ret;
2513
2514 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
2515 if (ret < 0) {
2516 pr_err("ctnetlink_init: cannot register notifier.\n");
2517 goto err_out;
2518 }
2519
2520 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
2521 if (ret < 0) {
2522 pr_err("ctnetlink_init: cannot expect register notifier.\n");
2523 goto err_unreg_notifier;
2524 }
2525#endif
2526 return 0;
2527
2528#ifdef CONFIG_NF_CONNTRACK_EVENTS
2529err_unreg_notifier:
2530 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2531err_out:
2532 return ret;
2533#endif
2534}
2535
2536static void ctnetlink_net_exit(struct net *net)
2537{
2538#ifdef CONFIG_NF_CONNTRACK_EVENTS
2539 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
2540 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2541#endif
2542}
2543
2544static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
2545{
2546 struct net *net;
2547
2548 list_for_each_entry(net, net_exit_list, exit_list)
2549 ctnetlink_net_exit(net);
2550}
2551
2552static struct pernet_operations ctnetlink_net_ops = {
2553 .init = ctnetlink_net_init,
2554 .exit_batch = ctnetlink_net_exit_batch,
2555};
2556
c1d10adb
PNA		 2557static int __init ctnetlink_init(void)
2558{
2559 int ret;
2560
654d0fbd 2561 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
c1d10adb
PNA		 2562 ret = nfnetlink_subsys_register(&ctnl_subsys);
2563 if (ret < 0) {
654d0fbd 2564 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 2565 goto err_out;
2566 }
2567
2568 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
2569 if (ret < 0) {
654d0fbd 2570 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 2571 goto err_unreg_subsys;
2572 }
2573
70e9942f
PNA		 2574 if (register_pernet_subsys(&ctnetlink_net_ops)) {
2575 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 2576 goto err_unreg_exp_subsys;
2577 }
9cb01766
PNA		 2578#if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \
2579 defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE)
2580 /* setup interaction between nf_queue and nf_conntrack_netlink. */
2581 RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook);
2582#endif
c1d10adb
PNA		 2583 return 0;
2584
c1d10adb
PNA		 2585err_unreg_exp_subsys:
2586 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 2587err_unreg_subsys:
2588 nfnetlink_subsys_unregister(&ctnl_subsys);
2589err_out:
2590 return ret;
2591}
2592
2593static void __exit ctnetlink_exit(void)
2594{
654d0fbd 2595 pr_info("ctnetlink: unregistering from nfnetlink.\n");
c1d10adb 2596
70e9942f 2597 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 2598 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
2599 nfnetlink_subsys_unregister(&ctnl_subsys);
9cb01766
PNA		 2600#if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \
2601 defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE)
2602 RCU_INIT_POINTER(nfq_ct_hook, NULL);
2603#endif
c1d10adb
PNA		 2604}
2605
2606module_init(ctnetlink_init);
2607module_exit(ctnetlink_exit);
Linux kernel - Deliverables
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