]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - net/netfilter/nf_conntrack_netlink.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
netfilter: Remove unnecessary cast on void pointer
[mirror_ubuntu-artful-kernel.git] / net / netfilter / nf_conntrack_netlink.c
CommitLineData
c1d10adb
PNA		 1/* Connection tracking via netlink socket. Allows for user space
2 * protocol helpers and general trouble making from userspace.
3 *
4 * (C) 2001 by Jay Schulist <jschlst@samba.org>
dc808fe2 5 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
c1d10adb 6 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
392025f8 7 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
c1d10adb 8 *
601e68e1 9 * Initial connection tracking via netlink development funded and
c1d10adb
PNA		 10 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
11 *
12 * Further development of this code funded by Astaro AG (http://www.astaro.com)
13 *
14 * This software may be used and distributed according to the terms
15 * of the GNU General Public License, incorporated herein by reference.
c1d10adb
PNA		 16 */
17
18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
711bbdd6 21#include <linux/rculist.h>
ea781f19 22#include <linux/rculist_nulls.h>
c1d10adb
PNA		 23#include <linux/types.h>
24#include <linux/timer.h>
1cc63249 25#include <linux/security.h>
c1d10adb
PNA		 26#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/netlink.h>
29#include <linux/spinlock.h>
40a839fd 30#include <linux/interrupt.h>
5a0e3ad6 31#include <linux/slab.h>
c1d10adb
PNA		 32
33#include <linux/netfilter.h>
dc5fc579 34#include <net/netlink.h>
9592a5c0 35#include <net/sock.h>
c1d10adb
PNA		 36#include <net/netfilter/nf_conntrack.h>
37#include <net/netfilter/nf_conntrack_core.h>
77ab9cff 38#include <net/netfilter/nf_conntrack_expect.h>
c1d10adb 39#include <net/netfilter/nf_conntrack_helper.h>
41d73ec0 40#include <net/netfilter/nf_conntrack_seqadj.h>
c1d10adb 41#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6 42#include <net/netfilter/nf_conntrack_l4proto.h>
5b1158e9 43#include <net/netfilter/nf_conntrack_tuple.h>
58401572 44#include <net/netfilter/nf_conntrack_acct.h>
ef00f89f 45#include <net/netfilter/nf_conntrack_zones.h>
a992ca2a 46#include <net/netfilter/nf_conntrack_timestamp.h>
c539f017 47#include <net/netfilter/nf_conntrack_labels.h>
5b1158e9
JK		 48#ifdef CONFIG_NF_NAT_NEEDED
49#include <net/netfilter/nf_nat_core.h>
c7232c99 50#include <net/netfilter/nf_nat_l4proto.h>
8c88f87c 51#include <net/netfilter/nf_nat_helper.h>
5b1158e9 52#endif
c1d10adb
PNA		 53
54#include <linux/netfilter/nfnetlink.h>
55#include <linux/netfilter/nfnetlink_conntrack.h>
56
57MODULE_LICENSE("GPL");
58
dc808fe2 59static char __initdata version[] = "0.93";
c1d10adb 60
4054ff45
PNA		 61static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
62 const struct nf_conntrack_tuple *tuple,
63 struct nf_conntrack_l4proto *l4proto)
c1d10adb 64{
c1d10adb 65 int ret = 0;
df6fb868 66 struct nlattr *nest_parms;
c1d10adb 67
df6fb868
PM		 68 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
69 if (!nest_parms)
70 goto nla_put_failure;
cc1eb431
DM		 71 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
72 goto nla_put_failure;
c1d10adb 73
fdf70832
PM		 74 if (likely(l4proto->tuple_to_nlattr))
75 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 76
df6fb868 77 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 78
79 return ret;
80
df6fb868 81nla_put_failure:
c1d10adb
PNA		 82 return -1;
83}
84
4054ff45
PNA		 85static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
86 const struct nf_conntrack_tuple *tuple,
87 struct nf_conntrack_l3proto *l3proto)
c1d10adb 88{
c1d10adb 89 int ret = 0;
df6fb868
PM		 90 struct nlattr *nest_parms;
91
92 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
93 if (!nest_parms)
94 goto nla_put_failure;
1cde6436 95
fdf70832
PM		 96 if (likely(l3proto->tuple_to_nlattr))
97 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 98
df6fb868 99 nla_nest_end(skb, nest_parms);
c1d10adb 100
1cde6436
PNA		 101 return ret;
102
df6fb868 103nla_put_failure:
1cde6436
PNA		 104 return -1;
105}
106
4054ff45
PNA		 107static int ctnetlink_dump_tuples(struct sk_buff *skb,
108 const struct nf_conntrack_tuple *tuple)
1cde6436
PNA		 109{
110 int ret;
111 struct nf_conntrack_l3proto *l3proto;
605dcad6 112 struct nf_conntrack_l4proto *l4proto;
1cde6436 113
3b988ece 114 rcu_read_lock();
528a3a6f 115 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 116 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 117
3b988ece
HS		 118 if (ret >= 0) {
119 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
120 tuple->dst.protonum);
121 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
122 }
123 rcu_read_unlock();
c1d10adb 124 return ret;
c1d10adb
PNA		 125}
126
4054ff45
PNA		 127static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
128 const struct nf_conntrack_zone *zone, int dir)
deedb590
DB		 129{
130 if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
131 return 0;
132 if (nla_put_be16(skb, attrtype, htons(zone->id)))
133 goto nla_put_failure;
134 return 0;
135
136nla_put_failure:
137 return -1;
138}
139
4054ff45 140static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 141{
cc1eb431
DM		 142 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
143 goto nla_put_failure;
c1d10adb
PNA		 144 return 0;
145
df6fb868 146nla_put_failure:
c1d10adb
PNA		 147 return -1;
148}
149
4054ff45 150static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 151{
d0b35b93 152 long timeout = nf_ct_expires(ct) / HZ;
601e68e1 153
cc1eb431
DM		 154 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
155 goto nla_put_failure;
c1d10adb
PNA		 156 return 0;
157
df6fb868 158nla_put_failure:
c1d10adb
PNA		 159 return -1;
160}
161
4054ff45 162static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 163{
5e8fbe2a 164 struct nf_conntrack_l4proto *l4proto;
df6fb868 165 struct nlattr *nest_proto;
c1d10adb
PNA		 166 int ret;
167
528a3a6f
PNA		 168 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
169 if (!l4proto->to_nlattr)
c1d10adb 170 return 0;
601e68e1 171
df6fb868
PM		 172 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
173 if (!nest_proto)
174 goto nla_put_failure;
c1d10adb 175
fdf70832 176 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 177
df6fb868 178 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 179
180 return ret;
181
df6fb868 182nla_put_failure:
c1d10adb
PNA		 183 return -1;
184}
185
4054ff45
PNA		 186static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
187 const struct nf_conn *ct)
c1d10adb 188{
df6fb868 189 struct nlattr *nest_helper;
dc808fe2 190 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 191 struct nf_conntrack_helper *helper;
c1d10adb 192
3c158f7f 193 if (!help)
c1d10adb 194 return 0;
601e68e1 195
3c158f7f
PM		 196 helper = rcu_dereference(help->helper);
197 if (!helper)
198 goto out;
199
df6fb868
PM		 200 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
201 if (!nest_helper)
202 goto nla_put_failure;
cc1eb431
DM		 203 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
204 goto nla_put_failure;
c1d10adb 205
fdf70832
PM		 206 if (helper->to_nlattr)
207 helper->to_nlattr(skb, ct);
c1d10adb 208
df6fb868 209 nla_nest_end(skb, nest_helper);
3c158f7f 210out:
c1d10adb
PNA		 211 return 0;
212
df6fb868 213nla_put_failure:
c1d10adb
PNA		 214 return -1;
215}
216
bb5cf80e 217static int
4542fa47
HE		 218dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
219 enum ip_conntrack_dir dir, int type)
c1d10adb 220{
4542fa47
HE		 221 enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
222 struct nf_conn_counter *counter = acct->counter;
df6fb868 223 struct nlattr *nest_count;
4542fa47 224 u64 pkts, bytes;
c1d10adb 225
4542fa47
HE		 226 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
227 pkts = atomic64_xchg(&counter[dir].packets, 0);
228 bytes = atomic64_xchg(&counter[dir].bytes, 0);
229 } else {
230 pkts = atomic64_read(&counter[dir].packets);
231 bytes = atomic64_read(&counter[dir].bytes);
232 }
233
234 nest_count = nla_nest_start(skb, attr | NLA_F_NESTED);
df6fb868
PM		 235 if (!nest_count)
236 goto nla_put_failure;
237
b46f6ded
ND		 238 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
239 CTA_COUNTERS_PAD) ||
240 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
241 CTA_COUNTERS_PAD))
cc1eb431 242 goto nla_put_failure;
c1d10adb 243
df6fb868 244 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 245
246 return 0;
247
df6fb868 248nla_put_failure:
c1d10adb
PNA		 249 return -1;
250}
c1d10adb 251
80e60e67 252static int
4542fa47 253ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
80e60e67 254{
4542fa47 255 struct nf_conn_acct *acct = nf_conn_acct_find(ct);
80e60e67 256
80e60e67
PNA		 257 if (!acct)
258 return 0;
259
4542fa47
HE		 260 if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
261 return -1;
262 if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
263 return -1;
264
265 return 0;
80e60e67
PNA		 266}
267
a992ca2a
PNA		 268static int
269ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
270{
271 struct nlattr *nest_count;
272 const struct nf_conn_tstamp *tstamp;
273
274 tstamp = nf_conn_tstamp_find(ct);
275 if (!tstamp)
276 return 0;
277
278 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
279 if (!nest_count)
280 goto nla_put_failure;
281
b46f6ded
ND		 282 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
283 CTA_TIMESTAMP_PAD) ||
cc1eb431 284 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
b46f6ded
ND		 285 cpu_to_be64(tstamp->stop),
286 CTA_TIMESTAMP_PAD)))
cc1eb431 287 goto nla_put_failure;
a992ca2a
PNA		 288 nla_nest_end(skb, nest_count);
289
290 return 0;
291
292nla_put_failure:
293 return -1;
294}
295
c1d10adb 296#ifdef CONFIG_NF_CONNTRACK_MARK
4054ff45 297static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 298{
cc1eb431
DM		 299 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
300 goto nla_put_failure;
c1d10adb
PNA		 301 return 0;
302
df6fb868 303nla_put_failure:
c1d10adb
PNA		 304 return -1;
305}
306#else
307#define ctnetlink_dump_mark(a, b) (0)
308#endif
309
37fccd85 310#ifdef CONFIG_NF_CONNTRACK_SECMARK
4054ff45 311static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 312{
1cc63249
EP		 313 struct nlattr *nest_secctx;
314 int len, ret;
315 char *secctx;
316
317 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
318 if (ret)
cba85b53 319 return 0;
1cc63249
EP		 320
321 ret = -1;
322 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
323 if (!nest_secctx)
324 goto nla_put_failure;
37fccd85 325
cc1eb431
DM		 326 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
327 goto nla_put_failure;
1cc63249
EP		 328 nla_nest_end(skb, nest_secctx);
329
330 ret = 0;
37fccd85 331nla_put_failure:
1cc63249
EP		 332 security_release_secctx(secctx, len);
333 return ret;
37fccd85
PNA		 334}
335#else
1cc63249 336#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 337#endif
338
0ceabd83 339#ifdef CONFIG_NF_CONNTRACK_LABELS
4a96300c 340static inline int ctnetlink_label_size(const struct nf_conn *ct)
0ceabd83
FW		 341{
342 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
343
344 if (!labels)
345 return 0;
23014011 346 return nla_total_size(sizeof(labels->bits));
0ceabd83
FW		 347}
348
349static int
350ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
351{
352 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
23014011 353 unsigned int i;
0ceabd83
FW		 354
355 if (!labels)
356 return 0;
357
0ceabd83
FW		 358 i = 0;
359 do {
360 if (labels->bits[i] != 0)
23014011
FW		 361 return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
362 labels->bits);
0ceabd83 363 i++;
23014011 364 } while (i < ARRAY_SIZE(labels->bits));
0ceabd83
FW		 365
366 return 0;
367}
368#else
369#define ctnetlink_dump_labels(a, b) (0)
370#define ctnetlink_label_size(a) (0)
371#endif
372
0f417ce9
PNA		 373#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
374
4054ff45 375static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
0f417ce9
PNA		 376{
377 struct nlattr *nest_parms;
378
379 if (!(ct->status & IPS_EXPECTED))
380 return 0;
381
382 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
383 if (!nest_parms)
384 goto nla_put_failure;
385 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
386 goto nla_put_failure;
387 nla_nest_end(skb, nest_parms);
388
389 return 0;
390
391nla_put_failure:
392 return -1;
393}
394
bb5cf80e 395static int
41d73ec0 396dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
13eae15a 397{
13eae15a
PNA		 398 struct nlattr *nest_parms;
399
400 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
401 if (!nest_parms)
402 goto nla_put_failure;
403
41d73ec0
PM		 404 if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
405 htonl(seq->correction_pos)) ||
406 nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
407 htonl(seq->offset_before)) ||
408 nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
409 htonl(seq->offset_after)))
cc1eb431 410 goto nla_put_failure;
13eae15a
PNA		 411
412 nla_nest_end(skb, nest_parms);
413
414 return 0;
415
416nla_put_failure:
417 return -1;
418}
419
4054ff45
PNA		 420static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb,
421 const struct nf_conn *ct)
13eae15a 422{
41d73ec0
PM		 423 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
424 struct nf_ct_seqadj *seq;
13eae15a 425
41d73ec0 426 if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
13eae15a
PNA		 427 return 0;
428
41d73ec0
PM		 429 seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
430 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
13eae15a
PNA		 431 return -1;
432
41d73ec0
PM		 433 seq = &seqadj->seq[IP_CT_DIR_REPLY];
434 if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
13eae15a
PNA		 435 return -1;
436
437 return 0;
438}
13eae15a 439
4054ff45 440static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 441{
cc1eb431
DM		 442 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
443 goto nla_put_failure;
c1d10adb
PNA		 444 return 0;
445
df6fb868 446nla_put_failure:
c1d10adb
PNA		 447 return -1;
448}
449
4054ff45 450static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
c1d10adb 451{
cc1eb431
DM		 452 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
453 goto nla_put_failure;
c1d10adb
PNA		 454 return 0;
455
df6fb868 456nla_put_failure:
c1d10adb
PNA		 457 return -1;
458}
459
c1d10adb 460static int
15e47304 461ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
80e60e67 462 struct nf_conn *ct)
c1d10adb 463{
308ac914 464 const struct nf_conntrack_zone *zone;
c1d10adb
PNA		 465 struct nlmsghdr *nlh;
466 struct nfgenmsg *nfmsg;
df6fb868 467 struct nlattr *nest_parms;
15e47304 468 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c1d10adb 469
dedb67c4 470 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW);
15e47304 471 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 472 if (nlh == NULL)
473 goto nlmsg_failure;
c1d10adb 474
96bcf938 475 nfmsg = nlmsg_data(nlh);
5e8fbe2a 476 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 477 nfmsg->version = NFNETLINK_V0;
478 nfmsg->res_id = 0;
479
deedb590
DB		 480 zone = nf_ct_zone(ct);
481
df6fb868
PM		 482 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
483 if (!nest_parms)
484 goto nla_put_failure;
f2f3e38c 485 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 486 goto nla_put_failure;
deedb590
DB		 487 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
488 NF_CT_ZONE_DIR_ORIG) < 0)
489 goto nla_put_failure;
df6fb868 490 nla_nest_end(skb, nest_parms);
601e68e1 491
df6fb868
PM		 492 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
493 if (!nest_parms)
494 goto nla_put_failure;
f2f3e38c 495 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 496 goto nla_put_failure;
deedb590
DB		 497 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
498 NF_CT_ZONE_DIR_REPL) < 0)
499 goto nla_put_failure;
df6fb868 500 nla_nest_end(skb, nest_parms);
c1d10adb 501
deedb590
DB		 502 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
503 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 504 goto nla_put_failure;
ef00f89f 505
c1d10adb
PNA		 506 if (ctnetlink_dump_status(skb, ct) < 0 ||
507 ctnetlink_dump_timeout(skb, ct) < 0 ||
4542fa47 508 ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 509 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 510 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
511 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
512 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 513 ctnetlink_dump_secctx(skb, ct) < 0 ||
0ceabd83 514 ctnetlink_dump_labels(skb, ct) < 0 ||
c1d10adb 515 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 516 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 517 ctnetlink_dump_master(skb, ct) < 0 ||
41d73ec0 518 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
df6fb868 519 goto nla_put_failure;
c1d10adb 520
96bcf938 521 nlmsg_end(skb, nlh);
c1d10adb
PNA		 522 return skb->len;
523
524nlmsg_failure:
df6fb868 525nla_put_failure:
96bcf938 526 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 527 return -1;
528}
529
4a96300c 530static inline size_t ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4
HE		 531{
532 struct nf_conntrack_l3proto *l3proto;
533 struct nf_conntrack_l4proto *l4proto;
03b64f51
PNA		 534 size_t len = 0;
535
536 rcu_read_lock();
537 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
538 len += l3proto->nla_size;
539
540 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
541 len += l4proto->nla_size;
542 rcu_read_unlock();
543
544 return len;
545}
546
4a96300c 547static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
d26e6a02
JP		 548{
549 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
550 return 0;
551 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
b46f6ded
ND		 552 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
553 + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
d26e6a02
JP		 554 ;
555}
556
4a96300c 557static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 558{
cba85b53
PNA		 559#ifdef CONFIG_NF_CONNTRACK_SECMARK
560 int len, ret;
1cc63249 561
cba85b53
PNA		 562 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
563 if (ret)
564 return 0;
1cc63249 565
cba85b53
PNA		 566 return nla_total_size(0) /* CTA_SECCTX */
567 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
568#else
569 return 0;
1cc63249 570#endif
cba85b53 571}
1cc63249 572
4a96300c 573static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
a992ca2a
PNA		 574{
575#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
576 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
577 return 0;
b46f6ded 578 return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
a992ca2a
PNA		 579#else
580 return 0;
581#endif
582}
583
4054ff45
PNA		 584#ifdef CONFIG_NF_CONNTRACK_EVENTS
585static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
03b64f51
PNA		 586{
587 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
588 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
589 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
590 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
591 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
592 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
593 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
f7b13e43 594 + ctnetlink_acct_size(ct)
a992ca2a 595 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 596 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
597 + nla_total_size(0) /* CTA_PROTOINFO */
598 + nla_total_size(0) /* CTA_HELP */
599 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 600 + ctnetlink_secctx_size(ct)
d271e8bd 601#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 602 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
603 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 604#endif
605#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 606 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 607#endif
608#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 609 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
d271e8bd 610#endif
03b64f51 611 + ctnetlink_proto_size(ct)
0ceabd83 612 + ctnetlink_label_size(ct)
03b64f51 613 ;
2732c4e4
HE		 614}
615
e34d5c1a
PNA		 616static int
617ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 618{
308ac914 619 const struct nf_conntrack_zone *zone;
9592a5c0 620 struct net *net;
c1d10adb
PNA		 621 struct nlmsghdr *nlh;
622 struct nfgenmsg *nfmsg;
df6fb868 623 struct nlattr *nest_parms;
19abb7b0 624 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 625 struct sk_buff *skb;
626 unsigned int type;
c1d10adb 627 unsigned int flags = 0, group;
dd7669a9 628 int err;
c1d10adb
PNA		 629
630 /* ignore our fake conntrack entry */
5bfddbd4 631 if (nf_ct_is_untracked(ct))
e34d5c1a 632 return 0;
c1d10adb 633
a0891aa6 634 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 635 type = IPCTNL_MSG_CT_DELETE;
636 group = NFNLGRP_CONNTRACK_DESTROY;
a0891aa6 637 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 638 type = IPCTNL_MSG_CT_NEW;
639 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 640 group = NFNLGRP_CONNTRACK_NEW;
17e6e4ea 641 } else if (events) {
c1d10adb
PNA		 642 type = IPCTNL_MSG_CT_NEW;
643 group = NFNLGRP_CONNTRACK_UPDATE;
644 } else
e34d5c1a 645 return 0;
a2427692 646
9592a5c0
AD		 647 net = nf_ct_net(ct);
648 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 649 return 0;
a2427692 650
03b64f51
PNA		 651 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
652 if (skb == NULL)
150ace0d 653 goto errout;
c1d10adb 654
dedb67c4 655 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type);
15e47304 656 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 657 if (nlh == NULL)
658 goto nlmsg_failure;
c1d10adb 659
96bcf938 660 nfmsg = nlmsg_data(nlh);
5e8fbe2a 661 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 662 nfmsg->version = NFNETLINK_V0;
663 nfmsg->res_id = 0;
664
528a3a6f 665 rcu_read_lock();
deedb590
DB		 666 zone = nf_ct_zone(ct);
667
df6fb868
PM		 668 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
669 if (!nest_parms)
670 goto nla_put_failure;
f2f3e38c 671 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868 672 goto nla_put_failure;
deedb590
DB		 673 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
674 NF_CT_ZONE_DIR_ORIG) < 0)
675 goto nla_put_failure;
df6fb868 676 nla_nest_end(skb, nest_parms);
601e68e1 677
df6fb868
PM		 678 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
679 if (!nest_parms)
680 goto nla_put_failure;
f2f3e38c 681 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868 682 goto nla_put_failure;
deedb590
DB		 683 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
684 NF_CT_ZONE_DIR_REPL) < 0)
685 goto nla_put_failure;
df6fb868 686 nla_nest_end(skb, nest_parms);
c1d10adb 687
deedb590
DB		 688 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
689 NF_CT_DEFAULT_ZONE_DIR) < 0)
cc1eb431 690 goto nla_put_failure;
ef00f89f 691
1eedf699
EL		 692 if (ctnetlink_dump_id(skb, ct) < 0)
693 goto nla_put_failure;
694
e57dce60
FH		 695 if (ctnetlink_dump_status(skb, ct) < 0)
696 goto nla_put_failure;
697
a0891aa6 698 if (events & (1 << IPCT_DESTROY)) {
4542fa47 699 if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
a992ca2a 700 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 701 goto nla_put_failure;
7b621c1e 702 } else {
7b621c1e 703 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 704 goto nla_put_failure;
7b621c1e 705
a0891aa6 706 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 707 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 708 goto nla_put_failure;
7b621c1e 709
a0891aa6 710 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 711 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 712 goto nla_put_failure;
7b621c1e 713
ff660c80 714#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 715 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 716 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 717 goto nla_put_failure;
ff660c80 718#endif
0ceabd83
FW		 719 if (events & (1 << IPCT_LABEL) &&
720 ctnetlink_dump_labels(skb, ct) < 0)
721 goto nla_put_failure;
7b621c1e 722
a0891aa6 723 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 724 ctnetlink_dump_master(skb, ct) < 0)
725 goto nla_put_failure;
726
41d73ec0
PM		 727 if (events & (1 << IPCT_SEQADJ) &&
728 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
13eae15a 729 goto nla_put_failure;
7b621c1e 730 }
b9a37e0c 731
a83099a6 732#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 733 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 734 && ctnetlink_dump_mark(skb, ct) < 0)
735 goto nla_put_failure;
736#endif
528a3a6f 737 rcu_read_unlock();
a83099a6 738
96bcf938 739 nlmsg_end(skb, nlh);
15e47304 740 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 741 GFP_ATOMIC);
dd7669a9
PNA		 742 if (err == -ENOBUFS || err == -EAGAIN)
743 return -ENOBUFS;
744
e34d5c1a 745 return 0;
c1d10adb 746
df6fb868 747nla_put_failure:
528a3a6f 748 rcu_read_unlock();
96bcf938 749 nlmsg_cancel(skb, nlh);
528a3a6f 750nlmsg_failure:
c1d10adb 751 kfree_skb(skb);
150ace0d 752errout:
37b7ef72
PNA		 753 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
754 return -ENOBUFS;
755
e34d5c1a 756 return 0;
c1d10adb
PNA		 757}
758#endif /* CONFIG_NF_CONNTRACK_EVENTS */
759
760static int ctnetlink_done(struct netlink_callback *cb)
761{
89f2e218
PM		 762 if (cb->args[1])
763 nf_ct_put((struct nf_conn *)cb->args[1]);
397304b5 764 kfree(cb->data);
c1d10adb
PNA		 765 return 0;
766}
767
866476f3 768struct ctnetlink_filter {
0f298a28
PNA		 769 struct {
770 u_int32_t val;
771 u_int32_t mask;
772 } mark;
773};
774
866476f3
KE		 775static struct ctnetlink_filter *
776ctnetlink_alloc_filter(const struct nlattr * const cda[])
777{
778#ifdef CONFIG_NF_CONNTRACK_MARK
779 struct ctnetlink_filter *filter;
780
781 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
782 if (filter == NULL)
783 return ERR_PTR(-ENOMEM);
784
785 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
786 filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
787
788 return filter;
789#else
790 return ERR_PTR(-EOPNOTSUPP);
791#endif
792}
793
794static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
795{
796 struct ctnetlink_filter *filter = data;
797
798 if (filter == NULL)
799 return 1;
800
801#ifdef CONFIG_NF_CONNTRACK_MARK
802 if ((ct->mark & filter->mark.mask) == filter->mark.val)
803 return 1;
804#endif
805
806 return 0;
807}
808
c1d10adb
PNA		 809static int
810ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
811{
9592a5c0 812 struct net *net = sock_net(skb->sk);
89f2e218 813 struct nf_conn *ct, *last;
c1d10adb 814 struct nf_conntrack_tuple_hash *h;
ea781f19 815 struct hlist_nulls_node *n;
96bcf938 816 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 817 u_int8_t l3proto = nfmsg->nfgen_family;
2344d64e
FW		 818 struct nf_conn *nf_ct_evict[8];
819 int res, i;
93bb0ceb
JDB		 820 spinlock_t *lockp;
821
d205dc40 822 last = (struct nf_conn *)cb->args[1];
2344d64e 823 i = 0;
93bb0ceb
JDB		 824
825 local_bh_disable();
56d52d48 826 for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
89f2e218 827restart:
2344d64e
FW		 828 while (i) {
829 i--;
830 if (nf_ct_should_gc(nf_ct_evict[i]))
831 nf_ct_kill(nf_ct_evict[i]);
832 nf_ct_put(nf_ct_evict[i]);
833 }
834
93bb0ceb 835 lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
b16c2919 836 nf_conntrack_lock(lockp);
56d52d48 837 if (cb->args[0] >= nf_conntrack_htable_size) {
93bb0ceb
JDB		 838 spin_unlock(lockp);
839 goto out;
840 }
56d52d48
FW		 841 hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
842 hnnode) {
5b1158e9 843 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 844 continue;
845 ct = nf_ct_tuplehash_to_ctrack(h);
2344d64e
FW		 846 if (nf_ct_is_expired(ct)) {
847 if (i < ARRAY_SIZE(nf_ct_evict) &&
848 atomic_inc_not_zero(&ct->ct_general.use))
849 nf_ct_evict[i++] = ct;
850 continue;
851 }
852
e0c7d472
FW		 853 if (!net_eq(net, nf_ct_net(ct)))
854 continue;
855
87711cb8
PNA		 856 /* Dump entries of a given L3 protocol number.
857 * If it is not specified, ie. l3proto == 0,
858 * then dump everything. */
5e8fbe2a 859 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 860 continue;
d205dc40
PM		 861 if (cb->args[1]) {
862 if (ct != last)
13ee6ac5 863 continue;
d205dc40 864 cb->args[1] = 0;
89f2e218 865 }
866476f3 866 if (!ctnetlink_filter_match(ct, cb->data))
0f298a28 867 continue;
866476f3 868
3b988ece
HS		 869 rcu_read_lock();
870 res =
15e47304 871 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 872 cb->nlh->nlmsg_seq,
873 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
874 ct);
875 rcu_read_unlock();
876 if (res < 0) {
c71caf41 877 nf_conntrack_get(&ct->ct_general);
89f2e218 878 cb->args[1] = (unsigned long)ct;
93bb0ceb 879 spin_unlock(lockp);
c1d10adb 880 goto out;
89f2e218
PM		 881 }
882 }
93bb0ceb 883 spin_unlock(lockp);
d205dc40 884 if (cb->args[1]) {
89f2e218
PM		 885 cb->args[1] = 0;
886 goto restart;
c1d10adb
PNA		 887 }
888 }
89f2e218 889out:
93bb0ceb 890 local_bh_enable();
d205dc40
PM		 891 if (last)
892 nf_ct_put(last);
c1d10adb 893
2344d64e
FW		 894 while (i) {
895 i--;
896 if (nf_ct_should_gc(nf_ct_evict[i]))
897 nf_ct_kill(nf_ct_evict[i]);
898 nf_ct_put(nf_ct_evict[i]);
899 }
900
c1d10adb
PNA		 901 return skb->len;
902}
903
4054ff45
PNA		 904static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
905 struct nf_conntrack_tuple *tuple)
c1d10adb 906{
df6fb868 907 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 908 struct nf_conntrack_l3proto *l3proto;
909 int ret = 0;
910
130ffbc2
DB		 911 ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
912 if (ret < 0)
913 return ret;
c1d10adb 914
cd91566e
FW		 915 rcu_read_lock();
916 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 917
f73e924c
PM		 918 if (likely(l3proto->nlattr_to_tuple)) {
919 ret = nla_validate_nested(attr, CTA_IP_MAX,
920 l3proto->nla_policy);
921 if (ret == 0)
922 ret = l3proto->nlattr_to_tuple(tb, tuple);
923 }
c1d10adb 924
cd91566e 925 rcu_read_unlock();
c1d10adb 926
c1d10adb
PNA		 927 return ret;
928}
929
f73e924c
PM		 930static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
931 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 932};
933
4054ff45
PNA		 934static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
935 struct nf_conntrack_tuple *tuple)
c1d10adb 936{
df6fb868 937 struct nlattr *tb[CTA_PROTO_MAX+1];
605dcad6 938 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 939 int ret = 0;
940
f73e924c
PM		 941 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
942 if (ret < 0)
943 return ret;
c1d10adb 944
df6fb868 945 if (!tb[CTA_PROTO_NUM])
c1d10adb 946 return -EINVAL;
77236b6e 947 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 948
cd91566e
FW		 949 rcu_read_lock();
950 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 951
f73e924c
PM		 952 if (likely(l4proto->nlattr_to_tuple)) {
953 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
954 l4proto->nla_policy);
955 if (ret == 0)
956 ret = l4proto->nlattr_to_tuple(tb, tuple);
957 }
c1d10adb 958
cd91566e 959 rcu_read_unlock();
601e68e1 960
c1d10adb
PNA		 961 return ret;
962}
963
deedb590
DB		 964static int
965ctnetlink_parse_zone(const struct nlattr *attr,
966 struct nf_conntrack_zone *zone)
967{
5e8018fc
DB		 968 nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
969 NF_CT_DEFAULT_ZONE_DIR, 0);
deedb590
DB		 970#ifdef CONFIG_NF_CONNTRACK_ZONES
971 if (attr)
972 zone->id = ntohs(nla_get_be16(attr));
973#else
974 if (attr)
975 return -EOPNOTSUPP;
976#endif
977 return 0;
978}
979
980static int
981ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
982 struct nf_conntrack_zone *zone)
983{
984 int ret;
985
986 if (zone->id != NF_CT_DEFAULT_ZONE_ID)
987 return -EINVAL;
988
989 ret = ctnetlink_parse_zone(attr, zone);
990 if (ret < 0)
991 return ret;
992
993 if (type == CTA_TUPLE_REPLY)
994 zone->dir = NF_CT_ZONE_DIR_REPL;
995 else
996 zone->dir = NF_CT_ZONE_DIR_ORIG;
997
998 return 0;
999}
1000
d0b0268f
PM		 1001static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
1002 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
1003 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
deedb590 1004 [CTA_TUPLE_ZONE] = { .type = NLA_U16 },
d0b0268f
PM		 1005};
1006
bb5cf80e 1007static int
39938324
PM		 1008ctnetlink_parse_tuple(const struct nlattr * const cda[],
1009 struct nf_conntrack_tuple *tuple,
deedb590
DB		 1010 enum ctattr_type type, u_int8_t l3num,
1011 struct nf_conntrack_zone *zone)
c1d10adb 1012{
df6fb868 1013 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 1014 int err;
1015
c1d10adb
PNA		 1016 memset(tuple, 0, sizeof(*tuple));
1017
130ffbc2
DB		 1018 err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
1019 if (err < 0)
1020 return err;
c1d10adb 1021
df6fb868 1022 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 1023 return -EINVAL;
1024
1025 tuple->src.l3num = l3num;
1026
df6fb868 1027 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 1028 if (err < 0)
1029 return err;
1030
df6fb868 1031 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 1032 return -EINVAL;
1033
df6fb868 1034 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 1035 if (err < 0)
1036 return err;
1037
deedb590
DB		 1038 if (tb[CTA_TUPLE_ZONE]) {
1039 if (!zone)
1040 return -EINVAL;
1041
1042 err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
1043 type, zone);
1044 if (err < 0)
1045 return err;
1046 }
1047
c1d10adb
PNA		 1048 /* orig and expect tuples get DIR_ORIGINAL */
1049 if (type == CTA_TUPLE_REPLY)
1050 tuple->dst.dir = IP_CT_DIR_REPLY;
1051 else
1052 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
1053
c1d10adb
PNA		 1054 return 0;
1055}
1056
d0b0268f 1057static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
6d1fafca
FW		 1058 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING,
1059 .len = NF_CT_HELPER_NAME_LEN - 1 },
d0b0268f
PM		 1060};
1061
4054ff45
PNA		 1062static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
1063 struct nlattr **helpinfo)
c1d10adb 1064{
130ffbc2 1065 int err;
df6fb868 1066 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 1067
130ffbc2
DB		 1068 err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
1069 if (err < 0)
1070 return err;
c1d10adb 1071
df6fb868 1072 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 1073 return -EINVAL;
1074
df6fb868 1075 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 1076
ae243bee
PNA		 1077 if (tb[CTA_HELP_INFO])
1078 *helpinfo = tb[CTA_HELP_INFO];
1079
c1d10adb
PNA		 1080 return 0;
1081}
1082
f73e924c 1083static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 1084 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
1085 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 1086 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 1087 [CTA_PROTOINFO] = { .type = NLA_NESTED },
1088 [CTA_HELP] = { .type = NLA_NESTED },
1089 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 1090 [CTA_TIMEOUT] = { .type = NLA_U32 },
1091 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 1092 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 1093 [CTA_NAT_DST] = { .type = NLA_NESTED },
1094 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
6d1fafca
FW		 1095 [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED },
1096 [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
ef00f89f 1097 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 1098 [CTA_MARK_MASK] = { .type = NLA_U32 },
9b21f6a9 1099 [CTA_LABELS] = { .type = NLA_BINARY,
d2bf2f34 1100 .len = NF_CT_LABELS_MAX_SIZE },
9b21f6a9 1101 [CTA_LABELS_MASK] = { .type = NLA_BINARY,
d2bf2f34 1102 .len = NF_CT_LABELS_MAX_SIZE },
c1d10adb
PNA		 1103};
1104
866476f3
KE		 1105static int ctnetlink_flush_conntrack(struct net *net,
1106 const struct nlattr * const cda[],
1107 u32 portid, int report)
1108{
1109 struct ctnetlink_filter *filter = NULL;
1110
1111 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1112 filter = ctnetlink_alloc_filter(cda);
1113 if (IS_ERR(filter))
1114 return PTR_ERR(filter);
1115 }
1116
1117 nf_ct_iterate_cleanup(net, ctnetlink_filter_match, filter,
1118 portid, report);
1119 kfree(filter);
1120
1121 return 0;
1122}
1123
7b8002a1
PNA		 1124static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl,
1125 struct sk_buff *skb,
1126 const struct nlmsghdr *nlh,
1127 const struct nlattr * const cda[])
c1d10adb
PNA		 1128{
1129 struct nf_conntrack_tuple_hash *h;
1130 struct nf_conntrack_tuple tuple;
1131 struct nf_conn *ct;
96bcf938 1132 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1133 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1134 struct nf_conntrack_zone zone;
ef00f89f
PM		 1135 int err;
1136
1137 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1138 if (err < 0)
1139 return err;
c1d10adb 1140
df6fb868 1141 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1142 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1143 u3, &zone);
df6fb868 1144 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1145 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1146 u3, &zone);
c1d10adb 1147 else {
866476f3
KE		 1148 return ctnetlink_flush_conntrack(net, cda,
1149 NETLINK_CB(skb).portid,
1150 nlmsg_report(nlh));
c1d10adb
PNA		 1151 }
1152
1153 if (err < 0)
1154 return err;
1155
308ac914 1156 h = nf_conntrack_find_get(net, &zone, &tuple);
9ea8cfd6 1157 if (!h)
c1d10adb 1158 return -ENOENT;
c1d10adb
PNA		 1159
1160 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 1161
df6fb868 1162 if (cda[CTA_ID]) {
77236b6e 1163 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 1164 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 1165 nf_ct_put(ct);
1166 return -ENOENT;
1167 }
601e68e1 1168 }
c1d10adb 1169
f330a7fd 1170 nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh));
c1d10adb 1171 nf_ct_put(ct);
c1d10adb
PNA		 1172
1173 return 0;
1174}
1175
7b8002a1
PNA		 1176static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl,
1177 struct sk_buff *skb,
1178 const struct nlmsghdr *nlh,
1179 const struct nlattr * const cda[])
c1d10adb
PNA		 1180{
1181 struct nf_conntrack_tuple_hash *h;
1182 struct nf_conntrack_tuple tuple;
1183 struct nf_conn *ct;
1184 struct sk_buff *skb2 = NULL;
96bcf938 1185 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1186 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1187 struct nf_conntrack_zone zone;
ef00f89f 1188 int err;
c1d10adb 1189
80d326fa
PNA		 1190 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1191 struct netlink_dump_control c = {
1192 .dump = ctnetlink_dump_table,
1193 .done = ctnetlink_done,
1194 };
866476f3 1195
0f298a28 1196 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
866476f3 1197 struct ctnetlink_filter *filter;
0f298a28 1198
866476f3
KE		 1199 filter = ctnetlink_alloc_filter(cda);
1200 if (IS_ERR(filter))
1201 return PTR_ERR(filter);
0f298a28 1202
0f298a28
PNA		 1203 c.data = filter;
1204 }
80d326fa
PNA		 1205 return netlink_dump_start(ctnl, skb, nlh, &c);
1206 }
c1d10adb 1207
ef00f89f
PM		 1208 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1209 if (err < 0)
1210 return err;
1211
df6fb868 1212 if (cda[CTA_TUPLE_ORIG])
deedb590
DB		 1213 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
1214 u3, &zone);
df6fb868 1215 else if (cda[CTA_TUPLE_REPLY])
deedb590
DB		 1216 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
1217 u3, &zone);
c1d10adb
PNA		 1218 else
1219 return -EINVAL;
1220
1221 if (err < 0)
1222 return err;
1223
308ac914 1224 h = nf_conntrack_find_get(net, &zone, &tuple);
9ea8cfd6 1225 if (!h)
c1d10adb 1226 return -ENOENT;
9ea8cfd6 1227
c1d10adb
PNA		 1228 ct = nf_ct_tuplehash_to_ctrack(h);
1229
1230 err = -ENOMEM;
96bcf938
PNA		 1231 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1232 if (skb2 == NULL) {
c1d10adb
PNA		 1233 nf_ct_put(ct);
1234 return -ENOMEM;
1235 }
c1d10adb 1236
528a3a6f 1237 rcu_read_lock();
15e47304 1238 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
80e60e67 1239 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1240 rcu_read_unlock();
c1d10adb
PNA		 1241 nf_ct_put(ct);
1242 if (err <= 0)
1243 goto free;
1244
15e47304 1245 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
c1d10adb
PNA		 1246 if (err < 0)
1247 goto out;
1248
c1d10adb
PNA		 1249 return 0;
1250
1251free:
1252 kfree_skb(skb2);
1253out:
f31e8d49
PNA		 1254 /* this avoids a loop in nfnetlink. */
1255 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1256}
1257
d871befe
PNA		 1258static int ctnetlink_done_list(struct netlink_callback *cb)
1259{
1260 if (cb->args[1])
1261 nf_ct_put((struct nf_conn *)cb->args[1]);
1262 return 0;
1263}
1264
1265static int
b7779d06 1266ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
d871befe 1267{
cd5f336f 1268 struct nf_conn *ct, *last;
d871befe
PNA		 1269 struct nf_conntrack_tuple_hash *h;
1270 struct hlist_nulls_node *n;
1271 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1272 u_int8_t l3proto = nfmsg->nfgen_family;
1273 int res;
b7779d06
JDB		 1274 int cpu;
1275 struct hlist_nulls_head *list;
1276 struct net *net = sock_net(skb->sk);
d871befe
PNA		 1277
1278 if (cb->args[2])
1279 return 0;
1280
cd5f336f
FW		 1281 last = (struct nf_conn *)cb->args[1];
1282
b7779d06
JDB		 1283 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1284 struct ct_pcpu *pcpu;
1285
1286 if (!cpu_possible(cpu))
d871befe 1287 continue;
b7779d06
JDB		 1288
1289 pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
1290 spin_lock_bh(&pcpu->lock);
b7779d06
JDB		 1291 list = dying ? &pcpu->dying : &pcpu->unconfirmed;
1292restart:
1293 hlist_nulls_for_each_entry(h, n, list, hnnode) {
1294 ct = nf_ct_tuplehash_to_ctrack(h);
1295 if (l3proto && nf_ct_l3num(ct) != l3proto)
d871befe 1296 continue;
b7779d06
JDB		 1297 if (cb->args[1]) {
1298 if (ct != last)
1299 continue;
1300 cb->args[1] = 0;
1301 }
1302 rcu_read_lock();
1303 res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
1304 cb->nlh->nlmsg_seq,
1305 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
1306 ct);
1307 rcu_read_unlock();
1308 if (res < 0) {
cd5f336f
FW		 1309 if (!atomic_inc_not_zero(&ct->ct_general.use))
1310 continue;
266155b2 1311 cb->args[0] = cpu;
b7779d06
JDB		 1312 cb->args[1] = (unsigned long)ct;
1313 spin_unlock_bh(&pcpu->lock);
1314 goto out;
1315 }
d871befe 1316 }
b7779d06
JDB		 1317 if (cb->args[1]) {
1318 cb->args[1] = 0;
1319 goto restart;
266155b2 1320 }
b7779d06 1321 spin_unlock_bh(&pcpu->lock);
d871befe 1322 }
266155b2 1323 cb->args[2] = 1;
d871befe 1324out:
d871befe
PNA		 1325 if (last)
1326 nf_ct_put(last);
1327
1328 return skb->len;
1329}
1330
1331static int
1332ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
1333{
b7779d06 1334 return ctnetlink_dump_list(skb, cb, true);
d871befe
PNA		 1335}
1336
7b8002a1
PNA		 1337static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl,
1338 struct sk_buff *skb,
1339 const struct nlmsghdr *nlh,
1340 const struct nlattr * const cda[])
d871befe
PNA		 1341{
1342 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1343 struct netlink_dump_control c = {
1344 .dump = ctnetlink_dump_dying,
1345 .done = ctnetlink_done_list,
1346 };
1347 return netlink_dump_start(ctnl, skb, nlh, &c);
1348 }
1349
1350 return -EOPNOTSUPP;
1351}
1352
1353static int
1354ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
1355{
b7779d06 1356 return ctnetlink_dump_list(skb, cb, false);
d871befe
PNA		 1357}
1358
7b8002a1
PNA		 1359static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl,
1360 struct sk_buff *skb,
1361 const struct nlmsghdr *nlh,
1362 const struct nlattr * const cda[])
d871befe
PNA		 1363{
1364 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1365 struct netlink_dump_control c = {
1366 .dump = ctnetlink_dump_unconfirmed,
1367 .done = ctnetlink_done_list,
1368 };
1369 return netlink_dump_start(ctnl, skb, nlh, &c);
1370 }
1371
1372 return -EOPNOTSUPP;
1373}
1374
67671841 1375#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1376static int
1377ctnetlink_parse_nat_setup(struct nf_conn *ct,
1378 enum nf_nat_manip_type manip,
39938324 1379 const struct nlattr *attr)
e6a7d3c0
PNA		 1380{
1381 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
c7232c99 1382 int err;
e6a7d3c0
PNA		 1383
1384 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1385 if (!parse_nat_setup) {
95a5afca 1386#ifdef CONFIG_MODULES
e6a7d3c0 1387 rcu_read_unlock();
c14b78e7 1388 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1389 if (request_module("nf-nat") < 0) {
c14b78e7 1390 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1391 rcu_read_lock();
1392 return -EOPNOTSUPP;
1393 }
c14b78e7 1394 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
e6a7d3c0
PNA		 1395 rcu_read_lock();
1396 if (nfnetlink_parse_nat_setup_hook)
1397 return -EAGAIN;
1398#endif
1399 return -EOPNOTSUPP;
1400 }
1401
c7232c99
PM		 1402 err = parse_nat_setup(ct, manip, attr);
1403 if (err == -EAGAIN) {
1404#ifdef CONFIG_MODULES
1405 rcu_read_unlock();
c14b78e7 1406 nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
c7232c99 1407 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
c14b78e7 1408 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1409 rcu_read_lock();
1410 return -EOPNOTSUPP;
1411 }
c14b78e7 1412 nfnl_lock(NFNL_SUBSYS_CTNETLINK);
c7232c99
PM		 1413 rcu_read_lock();
1414#else
1415 err = -EOPNOTSUPP;
1416#endif
1417 }
1418 return err;
e6a7d3c0 1419}
67671841 1420#endif
e6a7d3c0 1421
bb5cf80e 1422static int
39938324 1423ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1424{
1425 unsigned long d;
77236b6e 1426 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1427 d = ct->status ^ status;
1428
1429 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1430 /* unchangeable */
0adf9d67 1431 return -EBUSY;
601e68e1 1432
c1d10adb
PNA		 1433 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1434 /* SEEN_REPLY bit can only be set */
0adf9d67 1435 return -EBUSY;
601e68e1 1436
c1d10adb
PNA		 1437 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1438 /* ASSURED bit can only be set */
0adf9d67 1439 return -EBUSY;
c1d10adb 1440
c1d10adb
PNA		 1441 /* Be careful here, modifying NAT bits can screw up things,
1442 * so don't let users modify them directly if they don't pass
5b1158e9 1443 * nf_nat_range. */
c1d10adb
PNA		 1444 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1445 return 0;
1446}
1447
e6a7d3c0 1448static int
0eba801b 1449ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1450{
1451#ifdef CONFIG_NF_NAT_NEEDED
1452 int ret;
1453
fe337ac2
FW		 1454 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1455 return 0;
1456
0eba801b
PNA		 1457 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
1458 cda[CTA_NAT_DST]);
1459 if (ret < 0)
1460 return ret;
1461
1462 ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
1463 cda[CTA_NAT_SRC]);
1464 return ret;
e6a7d3c0 1465#else
0eba801b
PNA		 1466 if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
1467 return 0;
e6a7d3c0
PNA		 1468 return -EOPNOTSUPP;
1469#endif
1470}
c1d10adb 1471
4054ff45
PNA		 1472static int ctnetlink_change_helper(struct nf_conn *ct,
1473 const struct nlattr * const cda[])
c1d10adb
PNA		 1474{
1475 struct nf_conntrack_helper *helper;
dc808fe2 1476 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1477 char *helpname = NULL;
ae243bee 1478 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1479 int err;
1480
ae243bee 1481 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1482 if (err < 0)
1483 return err;
1484
f95d7a46
KC		 1485 /* don't change helper of sibling connections */
1486 if (ct->master) {
1487 /* If we try to change the helper to the same thing twice,
1488 * treat the second attempt as a no-op instead of returning
1489 * an error.
1490 */
1491 if (help && help->helper &&
1492 !strcmp(help->helper->name, helpname))
1493 return 0;
1494 else
1495 return -EBUSY;
1496 }
1497
df293bbb
YK		 1498 if (!strcmp(helpname, "")) {
1499 if (help && help->helper) {
c1d10adb
PNA		 1500 /* we had a helper before ... */
1501 nf_ct_remove_expectations(ct);
a9b3cd7f 1502 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1503 }
df293bbb
YK		 1504
1505 return 0;
c1d10adb 1506 }
601e68e1 1507
794e6871
PM		 1508 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1509 nf_ct_protonum(ct));
226c0c0e
PNA		 1510 if (helper == NULL) {
1511#ifdef CONFIG_MODULES
ca7433df 1512 spin_unlock_bh(&nf_conntrack_expect_lock);
226c0c0e
PNA		 1513
1514 if (request_module("nfct-helper-%s", helpname) < 0) {
ca7433df 1515 spin_lock_bh(&nf_conntrack_expect_lock);
226c0c0e
PNA		 1516 return -EOPNOTSUPP;
1517 }
1518
ca7433df 1519 spin_lock_bh(&nf_conntrack_expect_lock);
794e6871
PM		 1520 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1521 nf_ct_protonum(ct));
226c0c0e
PNA		 1522 if (helper)
1523 return -EAGAIN;
1524#endif
0adf9d67 1525 return -EOPNOTSUPP;
226c0c0e 1526 }
df293bbb 1527
ceceae1b 1528 if (help) {
ae243bee
PNA		 1529 if (help->helper == helper) {
1530 /* update private helper data if allowed. */
7be54ca4 1531 if (helper->from_nlattr)
ae243bee 1532 helper->from_nlattr(helpinfo, ct);
ceceae1b 1533 return 0;
fd7462de 1534 } else
ceceae1b 1535 return -EBUSY;
ceceae1b 1536 }
df293bbb 1537
fd7462de
PNA		 1538 /* we cannot set a helper for an existing conntrack */
1539 return -EOPNOTSUPP;
c1d10adb
PNA		 1540}
1541
4054ff45
PNA		 1542static int ctnetlink_change_timeout(struct nf_conn *ct,
1543 const struct nlattr * const cda[])
c1d10adb 1544{
77236b6e 1545 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
601e68e1 1546
f330a7fd 1547 ct->timeout = nfct_time_stamp + timeout * HZ;
c1d10adb 1548
f330a7fd
FW		 1549 if (test_bit(IPS_DYING_BIT, &ct->status))
1550 return -ETIME;
c1d10adb
PNA		 1551
1552 return 0;
1553}
1554
d0b0268f
PM		 1555static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1556 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1557 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1558 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1559};
1560
4054ff45
PNA		 1561static int ctnetlink_change_protoinfo(struct nf_conn *ct,
1562 const struct nlattr * const cda[])
c1d10adb 1563{
39938324
PM		 1564 const struct nlattr *attr = cda[CTA_PROTOINFO];
1565 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
605dcad6 1566 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 1567 int err = 0;
1568
130ffbc2
DB		 1569 err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
1570 if (err < 0)
1571 return err;
c1d10adb 1572
cd91566e
FW		 1573 rcu_read_lock();
1574 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1575 if (l4proto->from_nlattr)
1576 err = l4proto->from_nlattr(tb, ct);
cd91566e 1577 rcu_read_unlock();
c1d10adb
PNA		 1578
1579 return err;
1580}
1581
41d73ec0
PM		 1582static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = {
1583 [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 },
1584 [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 },
1585 [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 },
d0b0268f
PM		 1586};
1587
4054ff45
PNA		 1588static int change_seq_adj(struct nf_ct_seqadj *seq,
1589 const struct nlattr * const attr)
13eae15a 1590{
130ffbc2 1591 int err;
41d73ec0 1592 struct nlattr *cda[CTA_SEQADJ_MAX+1];
13eae15a 1593
41d73ec0 1594 err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy);
130ffbc2
DB		 1595 if (err < 0)
1596 return err;
13eae15a 1597
41d73ec0 1598 if (!cda[CTA_SEQADJ_CORRECTION_POS])
13eae15a
PNA		 1599 return -EINVAL;
1600
41d73ec0
PM		 1601 seq->correction_pos =
1602 ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));
13eae15a 1603
41d73ec0 1604 if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
13eae15a
PNA		 1605 return -EINVAL;
1606
41d73ec0
PM		 1607 seq->offset_before =
1608 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));
13eae15a 1609
41d73ec0 1610 if (!cda[CTA_SEQADJ_OFFSET_AFTER])
13eae15a
PNA		 1611 return -EINVAL;
1612
41d73ec0
PM		 1613 seq->offset_after =
1614 ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));
13eae15a
PNA		 1615
1616 return 0;
1617}
1618
1619static int
41d73ec0
PM		 1620ctnetlink_change_seq_adj(struct nf_conn *ct,
1621 const struct nlattr * const cda[])
13eae15a 1622{
41d73ec0 1623 struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
13eae15a 1624 int ret = 0;
13eae15a 1625
41d73ec0 1626 if (!seqadj)
13eae15a
PNA		 1627 return 0;
1628
41d73ec0
PM		 1629 if (cda[CTA_SEQ_ADJ_ORIG]) {
1630 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
1631 cda[CTA_SEQ_ADJ_ORIG]);
13eae15a
PNA		 1632 if (ret < 0)
1633 return ret;
1634
1635 ct->status |= IPS_SEQ_ADJUST;
1636 }
1637
41d73ec0
PM		 1638 if (cda[CTA_SEQ_ADJ_REPLY]) {
1639 ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
1640 cda[CTA_SEQ_ADJ_REPLY]);
13eae15a
PNA		 1641 if (ret < 0)
1642 return ret;
1643
1644 ct->status |= IPS_SEQ_ADJUST;
1645 }
1646
1647 return 0;
1648}
13eae15a 1649
9b21f6a9
FW		 1650static int
1651ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
1652{
1653#ifdef CONFIG_NF_CONNTRACK_LABELS
1654 size_t len = nla_len(cda[CTA_LABELS]);
1655 const void *mask = cda[CTA_LABELS_MASK];
1656
1657 if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
1658 return -EINVAL;
1659
1660 if (mask) {
1661 if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
1662 nla_len(cda[CTA_LABELS_MASK]) != len)
1663 return -EINVAL;
1664 mask = nla_data(cda[CTA_LABELS_MASK]);
1665 }
1666
1667 len /= sizeof(u32);
1668
1669 return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
1670#else
1671 return -EOPNOTSUPP;
1672#endif
1673}
1674
c1d10adb 1675static int
39938324
PM		 1676ctnetlink_change_conntrack(struct nf_conn *ct,
1677 const struct nlattr * const cda[])
c1d10adb
PNA		 1678{
1679 int err;
1680
e098360f
PNA		 1681 /* only allow NAT changes and master assignation for new conntracks */
1682 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1683 return -EOPNOTSUPP;
1684
df6fb868 1685 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1686 err = ctnetlink_change_helper(ct, cda);
1687 if (err < 0)
1688 return err;
1689 }
1690
df6fb868 1691 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1692 err = ctnetlink_change_timeout(ct, cda);
1693 if (err < 0)
1694 return err;
1695 }
1696
df6fb868 1697 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1698 err = ctnetlink_change_status(ct, cda);
1699 if (err < 0)
1700 return err;
1701 }
1702
df6fb868 1703 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1704 err = ctnetlink_change_protoinfo(ct, cda);
1705 if (err < 0)
1706 return err;
1707 }
1708
bcd1e830 1709#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1710 if (cda[CTA_MARK])
77236b6e 1711 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1712#endif
1713
41d73ec0
PM		 1714 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1715 err = ctnetlink_change_seq_adj(ct, cda);
13eae15a
PNA		 1716 if (err < 0)
1717 return err;
1718 }
41d73ec0 1719
9b21f6a9
FW		 1720 if (cda[CTA_LABELS]) {
1721 err = ctnetlink_attach_labels(ct, cda);
1722 if (err < 0)
1723 return err;
1724 }
13eae15a 1725
c1d10adb
PNA		 1726 return 0;
1727}
1728
f0a3c086 1729static struct nf_conn *
308ac914
DB		 1730ctnetlink_create_conntrack(struct net *net,
1731 const struct nf_conntrack_zone *zone,
9592a5c0 1732 const struct nlattr * const cda[],
c1d10adb 1733 struct nf_conntrack_tuple *otuple,
5faa1f4c 1734 struct nf_conntrack_tuple *rtuple,
7ec47496 1735 u8 u3)
c1d10adb
PNA		 1736{
1737 struct nf_conn *ct;
1738 int err = -EINVAL;
ceceae1b 1739 struct nf_conntrack_helper *helper;
315c34da 1740 struct nf_conn_tstamp *tstamp;
c1d10adb 1741
ef00f89f 1742 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1743 if (IS_ERR(ct))
f0a3c086 1744 return ERR_PTR(-ENOMEM);
c1d10adb 1745
df6fb868 1746 if (!cda[CTA_TIMEOUT])
0f5b3e85 1747 goto err1;
c1d10adb 1748
f330a7fd 1749 ct->timeout = nfct_time_stamp + ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;
c1d10adb 1750
1575e7ea 1751 rcu_read_lock();
226c0c0e 1752 if (cda[CTA_HELP]) {
29fe1b48 1753 char *helpname = NULL;
ae243bee
PNA		 1754 struct nlattr *helpinfo = NULL;
1755
1756 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1757 if (err < 0)
1758 goto err2;
226c0c0e 1759
794e6871
PM		 1760 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1761 nf_ct_protonum(ct));
226c0c0e
PNA		 1762 if (helper == NULL) {
1763 rcu_read_unlock();
1764#ifdef CONFIG_MODULES
1765 if (request_module("nfct-helper-%s", helpname) < 0) {
1766 err = -EOPNOTSUPP;
0f5b3e85 1767 goto err1;
226c0c0e
PNA		 1768 }
1769
1770 rcu_read_lock();
794e6871
PM		 1771 helper = __nf_conntrack_helper_find(helpname,
1772 nf_ct_l3num(ct),
1773 nf_ct_protonum(ct));
226c0c0e 1774 if (helper) {
226c0c0e 1775 err = -EAGAIN;
0f5b3e85 1776 goto err2;
226c0c0e
PNA		 1777 }
1778 rcu_read_unlock();
1779#endif
1780 err = -EOPNOTSUPP;
0f5b3e85 1781 goto err1;
226c0c0e
PNA		 1782 } else {
1783 struct nf_conn_help *help;
1784
1afc5679 1785 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1786 if (help == NULL) {
226c0c0e 1787 err = -ENOMEM;
0f5b3e85 1788 goto err2;
226c0c0e 1789 }
ae243bee 1790 /* set private helper data if allowed. */
7be54ca4 1791 if (helper->from_nlattr)
ae243bee 1792 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1793
1794 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1795 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1796 }
1797 } else {
1798 /* try an implicit helper assignation */
b2a15a60 1799 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1800 if (err < 0)
1801 goto err2;
1575e7ea
PNA		 1802 }
1803
0eba801b
PNA		 1804 err = ctnetlink_setup_nat(ct, cda);
1805 if (err < 0)
1806 goto err2;
e6a7d3c0 1807
a88e22ad 1808 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1809 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad 1810 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
c539f017
FW		 1811 nf_ct_labels_ext_add(ct);
1812
a88e22ad
PNA		 1813 /* we must add conntrack extensions before confirmation. */
1814 ct->status |= IPS_CONFIRMED;
1815
1816 if (cda[CTA_STATUS]) {
1817 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1818 if (err < 0)
1819 goto err2;
bbb3357d 1820 }
c1d10adb 1821
41d73ec0
PM		 1822 if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
1823 err = ctnetlink_change_seq_adj(ct, cda);
0f5b3e85
PM		 1824 if (err < 0)
1825 goto err2;
c969aa7d 1826 }
c969aa7d 1827
e5fc9e7a 1828 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 1829 if (cda[CTA_PROTOINFO]) {
c1d10adb 1830 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 1831 if (err < 0)
1832 goto err2;
c1d10adb
PNA		 1833 }
1834
bcd1e830 1835#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1836 if (cda[CTA_MARK])
77236b6e 1837 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1838#endif
1839
5faa1f4c 1840 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 1841 if (cda[CTA_TUPLE_MASTER]) {
1842 struct nf_conntrack_tuple master;
1843 struct nf_conntrack_tuple_hash *master_h;
1844 struct nf_conn *master_ct;
1845
deedb590
DB		 1846 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
1847 u3, NULL);
7ec47496 1848 if (err < 0)
0f5b3e85 1849 goto err2;
7ec47496 1850
ef00f89f 1851 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 1852 if (master_h == NULL) {
1853 err = -ENOENT;
0f5b3e85 1854 goto err2;
7ec47496
PNA		 1855 }
1856 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 1857 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 1858 ct->master = master_ct;
f2a89004 1859 }
315c34da
PNA		 1860 tstamp = nf_conn_tstamp_find(ct);
1861 if (tstamp)
d2de875c 1862 tstamp->start = ktime_get_real_ns();
5faa1f4c 1863
7d367e06
JK		 1864 err = nf_conntrack_hash_check_insert(ct);
1865 if (err < 0)
1866 goto err2;
1867
58a3c9bb 1868 rcu_read_unlock();
dafc741c 1869
f0a3c086 1870 return ct;
c1d10adb 1871
0f5b3e85
PM		 1872err2:
1873 rcu_read_unlock();
1874err1:
c1d10adb 1875 nf_conntrack_free(ct);
f0a3c086 1876 return ERR_PTR(err);
c1d10adb
PNA		 1877}
1878
7b8002a1
PNA		 1879static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
1880 struct sk_buff *skb,
1881 const struct nlmsghdr *nlh,
1882 const struct nlattr * const cda[])
c1d10adb
PNA		 1883{
1884 struct nf_conntrack_tuple otuple, rtuple;
1885 struct nf_conntrack_tuple_hash *h = NULL;
96bcf938 1886 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
7d367e06 1887 struct nf_conn *ct;
c1d10adb 1888 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 1889 struct nf_conntrack_zone zone;
ef00f89f
PM		 1890 int err;
1891
1892 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1893 if (err < 0)
1894 return err;
c1d10adb 1895
df6fb868 1896 if (cda[CTA_TUPLE_ORIG]) {
deedb590
DB		 1897 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
1898 u3, &zone);
c1d10adb
PNA		 1899 if (err < 0)
1900 return err;
1901 }
1902
df6fb868 1903 if (cda[CTA_TUPLE_REPLY]) {
deedb590
DB		 1904 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
1905 u3, &zone);
c1d10adb
PNA		 1906 if (err < 0)
1907 return err;
1908 }
1909
df6fb868 1910 if (cda[CTA_TUPLE_ORIG])
308ac914 1911 h = nf_conntrack_find_get(net, &zone, &otuple);
df6fb868 1912 else if (cda[CTA_TUPLE_REPLY])
308ac914 1913 h = nf_conntrack_find_get(net, &zone, &rtuple);
c1d10adb
PNA		 1914
1915 if (h == NULL) {
c1d10adb 1916 err = -ENOENT;
f0a3c086 1917 if (nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 1918 enum ip_conntrack_events events;
5faa1f4c 1919
442fad94
FW		 1920 if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
1921 return -EINVAL;
aa0c2c68
LZ		 1922 if (otuple.dst.protonum != rtuple.dst.protonum)
1923 return -EINVAL;
442fad94 1924
308ac914 1925 ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple,
f0a3c086 1926 &rtuple, u3);
7d367e06
JK		 1927 if (IS_ERR(ct))
1928 return PTR_ERR(ct);
1929
f0a3c086 1930 err = 0;
fecc1133
PNA		 1931 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1932 events = IPCT_RELATED;
1933 else
1934 events = IPCT_NEW;
1935
9b21f6a9
FW		 1936 if (cda[CTA_LABELS] &&
1937 ctnetlink_attach_labels(ct, cda) == 0)
1938 events |= (1 << IPCT_LABEL);
1939
858b3133
PM		 1940 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1941 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1942 (1 << IPCT_HELPER) |
1943 (1 << IPCT_PROTOINFO) |
41d73ec0 1944 (1 << IPCT_SEQADJ) |
a0891aa6 1945 (1 << IPCT_MARK) | events,
15e47304 1946 ct, NETLINK_CB(skb).portid,
a0891aa6 1947 nlmsg_report(nlh));
f0a3c086 1948 nf_ct_put(ct);
7d367e06 1949 }
5faa1f4c 1950
c1d10adb
PNA		 1951 return err;
1952 }
1953 /* implicit 'else' */
1954
c1d10adb 1955 err = -EEXIST;
7d367e06 1956 ct = nf_ct_tuplehash_to_ctrack(h);
ff4ca827 1957 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
ca7433df 1958 spin_lock_bh(&nf_conntrack_expect_lock);
19abb7b0 1959 err = ctnetlink_change_conntrack(ct, cda);
ca7433df 1960 spin_unlock_bh(&nf_conntrack_expect_lock);
19abb7b0 1961 if (err == 0) {
858b3133
PM		 1962 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1963 (1 << IPCT_ASSURED) |
a0891aa6 1964 (1 << IPCT_HELPER) |
797a7d66 1965 (1 << IPCT_LABEL) |
a0891aa6 1966 (1 << IPCT_PROTOINFO) |
41d73ec0 1967 (1 << IPCT_SEQADJ) |
a0891aa6 1968 (1 << IPCT_MARK),
15e47304 1969 ct, NETLINK_CB(skb).portid,
a0891aa6 1970 nlmsg_report(nlh));
7d367e06 1971 }
ff4ca827 1972 }
c1d10adb 1973
7d367e06 1974 nf_ct_put(ct);
c1d10adb
PNA		 1975 return err;
1976}
1977
392025f8 1978static int
15e47304 1979ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 1980 __u16 cpu, const struct ip_conntrack_stat *st)
1981{
1982 struct nlmsghdr *nlh;
1983 struct nfgenmsg *nfmsg;
15e47304 1984 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 1985
dedb67c4
PNA		 1986 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
1987 IPCTNL_MSG_CT_GET_STATS_CPU);
15e47304 1988 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 1989 if (nlh == NULL)
1990 goto nlmsg_failure;
1991
1992 nfmsg = nlmsg_data(nlh);
1993 nfmsg->nfgen_family = AF_UNSPEC;
1994 nfmsg->version = NFNETLINK_V0;
1995 nfmsg->res_id = htons(cpu);
1996
8e8118f8 1997 if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
392025f8
PNA		 1998 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
1999 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
392025f8
PNA		 2000 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
2001 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
2002 htonl(st->insert_failed)) ||
2003 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
2004 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
2005 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
2006 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
2007 htonl(st->search_restart)))
2008 goto nla_put_failure;
2009
2010 nlmsg_end(skb, nlh);
2011 return skb->len;
2012
2013nla_put_failure:
2014nlmsg_failure:
2015 nlmsg_cancel(skb, nlh);
2016 return -1;
2017}
2018
2019static int
2020ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2021{
2022 int cpu;
2023 struct net *net = sock_net(skb->sk);
2024
2025 if (cb->args[0] == nr_cpu_ids)
2026 return 0;
2027
2028 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2029 const struct ip_conntrack_stat *st;
2030
2031 if (!cpu_possible(cpu))
2032 continue;
2033
2034 st = per_cpu_ptr(net->ct.stat, cpu);
2035 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 2036 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2037 cb->nlh->nlmsg_seq,
2038 cpu, st) < 0)
2039 break;
2040 }
2041 cb->args[0] = cpu;
2042
2043 return skb->len;
2044}
2045
7b8002a1
PNA		 2046static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl,
2047 struct sk_buff *skb,
2048 const struct nlmsghdr *nlh,
2049 const struct nlattr * const cda[])
392025f8
PNA		 2050{
2051 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2052 struct netlink_dump_control c = {
2053 .dump = ctnetlink_ct_stat_cpu_dump,
2054 };
2055 return netlink_dump_start(ctnl, skb, nlh, &c);
2056 }
2057
2058 return 0;
2059}
2060
2061static int
15e47304 2062ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 2063 struct net *net)
2064{
2065 struct nlmsghdr *nlh;
2066 struct nfgenmsg *nfmsg;
15e47304 2067 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 2068 unsigned int nr_conntracks = atomic_read(&net->ct.count);
2069
dedb67c4 2070 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS);
15e47304 2071 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2072 if (nlh == NULL)
2073 goto nlmsg_failure;
2074
2075 nfmsg = nlmsg_data(nlh);
2076 nfmsg->nfgen_family = AF_UNSPEC;
2077 nfmsg->version = NFNETLINK_V0;
2078 nfmsg->res_id = 0;
2079
2080 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
2081 goto nla_put_failure;
2082
2083 nlmsg_end(skb, nlh);
2084 return skb->len;
2085
2086nla_put_failure:
2087nlmsg_failure:
2088 nlmsg_cancel(skb, nlh);
2089 return -1;
2090}
2091
7b8002a1
PNA		 2092static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl,
2093 struct sk_buff *skb, const struct nlmsghdr *nlh,
2094 const struct nlattr * const cda[])
392025f8
PNA		 2095{
2096 struct sk_buff *skb2;
2097 int err;
2098
2099 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2100 if (skb2 == NULL)
2101 return -ENOMEM;
2102
15e47304 2103 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
392025f8
PNA		 2104 nlh->nlmsg_seq,
2105 NFNL_MSG_TYPE(nlh->nlmsg_type),
2106 sock_net(skb->sk));
2107 if (err <= 0)
2108 goto free;
2109
15e47304 2110 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
392025f8
PNA		 2111 if (err < 0)
2112 goto out;
2113
2114 return 0;
2115
2116free:
2117 kfree_skb(skb2);
2118out:
2119 /* this avoids a loop in nfnetlink. */
2120 return err == -EAGAIN ? -ENOBUFS : err;
2121}
2122
bd077937
PNA		 2123static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
2124 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2125 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2126 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
2127 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2128 [CTA_EXPECT_ID] = { .type = NLA_U32 },
2129 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING,
2130 .len = NF_CT_HELPER_NAME_LEN - 1 },
2131 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
2132 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
2133 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
2134 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
2135 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
2136};
2137
2138static struct nf_conntrack_expect *
2139ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct,
2140 struct nf_conntrack_helper *helper,
2141 struct nf_conntrack_tuple *tuple,
2142 struct nf_conntrack_tuple *mask);
2143
83f3e94d 2144#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 2145static size_t
a4b4766c 2146ctnetlink_glue_build_size(const struct nf_conn *ct)
9cb01766
PNA		 2147{
2148 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
2149 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
2150 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
2151 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
2152 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
2153 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
2154 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
2155 + nla_total_size(0) /* CTA_PROTOINFO */
2156 + nla_total_size(0) /* CTA_HELP */
2157 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
2158 + ctnetlink_secctx_size(ct)
2159#ifdef CONFIG_NF_NAT_NEEDED
2160 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
2161 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
2162#endif
2163#ifdef CONFIG_NF_CONNTRACK_MARK
2164 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
4a001068
KM		 2165#endif
2166#ifdef CONFIG_NF_CONNTRACK_ZONES
deedb590 2167 + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
9cb01766
PNA		 2168#endif
2169 + ctnetlink_proto_size(ct)
2170 ;
2171}
2172
224a0597 2173static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
a4b4766c 2174 enum ip_conntrack_info *ctinfo)
b7bd1809
PNA		 2175{
2176 struct nf_conn *ct;
2177
2178 ct = nf_ct_get(skb, ctinfo);
2179 if (ct && nf_ct_is_untracked(ct))
2180 ct = NULL;
2181
2182 return ct;
2183}
2184
a4b4766c 2185static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
9cb01766 2186{
308ac914 2187 const struct nf_conntrack_zone *zone;
9cb01766
PNA		 2188 struct nlattr *nest_parms;
2189
2190 rcu_read_lock();
deedb590
DB		 2191 zone = nf_ct_zone(ct);
2192
9cb01766
PNA		 2193 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
2194 if (!nest_parms)
2195 goto nla_put_failure;
2196 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
2197 goto nla_put_failure;
deedb590
DB		 2198 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2199 NF_CT_ZONE_DIR_ORIG) < 0)
2200 goto nla_put_failure;
9cb01766
PNA		 2201 nla_nest_end(skb, nest_parms);
2202
2203 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
2204 if (!nest_parms)
2205 goto nla_put_failure;
2206 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
2207 goto nla_put_failure;
deedb590
DB		 2208 if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
2209 NF_CT_ZONE_DIR_REPL) < 0)
2210 goto nla_put_failure;
9cb01766
PNA		 2211 nla_nest_end(skb, nest_parms);
2212
deedb590
DB		 2213 if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
2214 NF_CT_DEFAULT_ZONE_DIR) < 0)
308ac914 2215 goto nla_put_failure;
9cb01766
PNA		 2216
2217 if (ctnetlink_dump_id(skb, ct) < 0)
2218 goto nla_put_failure;
2219
2220 if (ctnetlink_dump_status(skb, ct) < 0)
2221 goto nla_put_failure;
2222
2223 if (ctnetlink_dump_timeout(skb, ct) < 0)
2224 goto nla_put_failure;
2225
2226 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
2227 goto nla_put_failure;
2228
2229 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
2230 goto nla_put_failure;
2231
2232#ifdef CONFIG_NF_CONNTRACK_SECMARK
2233 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
2234 goto nla_put_failure;
2235#endif
2236 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
2237 goto nla_put_failure;
2238
2239 if ((ct->status & IPS_SEQ_ADJUST) &&
41d73ec0 2240 ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
9cb01766
PNA		 2241 goto nla_put_failure;
2242
2243#ifdef CONFIG_NF_CONNTRACK_MARK
2244 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
2245 goto nla_put_failure;
2246#endif
0ceabd83
FW		 2247 if (ctnetlink_dump_labels(skb, ct) < 0)
2248 goto nla_put_failure;
9cb01766
PNA		 2249 rcu_read_unlock();
2250 return 0;
2251
2252nla_put_failure:
2253 rcu_read_unlock();
2254 return -ENOSPC;
2255}
2256
b7bd1809 2257static int
a4b4766c
KM		 2258ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
2259 enum ip_conntrack_info ctinfo,
2260 u_int16_t ct_attr, u_int16_t ct_info_attr)
b7bd1809
PNA		 2261{
2262 struct nlattr *nest_parms;
2263
2264 nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED);
2265 if (!nest_parms)
2266 goto nla_put_failure;
2267
a4b4766c 2268 if (__ctnetlink_glue_build(skb, ct) < 0)
b7bd1809
PNA		 2269 goto nla_put_failure;
2270
2271 nla_nest_end(skb, nest_parms);
2272
2273 if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
2274 goto nla_put_failure;
2275
2276 return 0;
2277
2278nla_put_failure:
2279 return -ENOSPC;
2280}
2281
a963d710
KC		 2282static int
2283ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[])
2284{
2285 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
2286 unsigned long d = ct->status ^ status;
2287
2288 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
2289 /* SEEN_REPLY bit can only be set */
2290 return -EBUSY;
2291
2292 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
2293 /* ASSURED bit can only be set */
2294 return -EBUSY;
2295
2296 /* This check is less strict than ctnetlink_change_status()
2297 * because callers often flip IPS_EXPECTED bits when sending
2298 * an NFQA_CT attribute to the kernel. So ignore the
2299 * unchangeable bits but do not error out.
2300 */
2301 ct->status = (status & ~IPS_UNCHANGEABLE_MASK) |
2302 (ct->status & IPS_UNCHANGEABLE_MASK);
2303 return 0;
2304}
2305
9cb01766 2306static int
a4b4766c 2307ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
9cb01766
PNA		 2308{
2309 int err;
2310
2311 if (cda[CTA_TIMEOUT]) {
2312 err = ctnetlink_change_timeout(ct, cda);
2313 if (err < 0)
2314 return err;
2315 }
2316 if (cda[CTA_STATUS]) {
a963d710 2317 err = ctnetlink_update_status(ct, cda);
9cb01766
PNA		 2318 if (err < 0)
2319 return err;
2320 }
2321 if (cda[CTA_HELP]) {
2322 err = ctnetlink_change_helper(ct, cda);
2323 if (err < 0)
2324 return err;
2325 }
9b21f6a9
FW		 2326 if (cda[CTA_LABELS]) {
2327 err = ctnetlink_attach_labels(ct, cda);
2328 if (err < 0)
2329 return err;
2330 }
9cb01766 2331#if defined(CONFIG_NF_CONNTRACK_MARK)
534473c6
FW		 2332 if (cda[CTA_MARK]) {
2333 u32 mask = 0, mark, newmark;
2334 if (cda[CTA_MARK_MASK])
2335 mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
2336
2337 mark = ntohl(nla_get_be32(cda[CTA_MARK]));
2338 newmark = (ct->mark & mask) ^ mark;
2339 if (newmark != ct->mark)
2340 ct->mark = newmark;
2341 }
9cb01766
PNA		 2342#endif
2343 return 0;
2344}
2345
2346static int
a4b4766c 2347ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
9cb01766
PNA		 2348{
2349 struct nlattr *cda[CTA_MAX+1];
68e035c9 2350 int ret;
9cb01766 2351
130ffbc2
DB		 2352 ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
2353 if (ret < 0)
2354 return ret;
9cb01766 2355
ca7433df 2356 spin_lock_bh(&nf_conntrack_expect_lock);
a4b4766c 2357 ret = ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
ca7433df 2358 spin_unlock_bh(&nf_conntrack_expect_lock);
68e035c9
PNA		 2359
2360 return ret;
9cb01766
PNA		 2361}
2362
a4b4766c
KM		 2363static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
2364 const struct nf_conn *ct,
2365 struct nf_conntrack_tuple *tuple,
2366 struct nf_conntrack_tuple *mask)
bd077937
PNA		 2367{
2368 int err;
2369
2370 err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
deedb590 2371 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2372 if (err < 0)
2373 return err;
2374
2375 return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
deedb590 2376 nf_ct_l3num(ct), NULL);
bd077937
PNA		 2377}
2378
2379static int
a4b4766c
KM		 2380ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
2381 u32 portid, u32 report)
bd077937
PNA		 2382{
2383 struct nlattr *cda[CTA_EXPECT_MAX+1];
2384 struct nf_conntrack_tuple tuple, mask;
b7e092c0 2385 struct nf_conntrack_helper *helper = NULL;
bd077937
PNA		 2386 struct nf_conntrack_expect *exp;
2387 int err;
2388
2389 err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy);
2390 if (err < 0)
2391 return err;
2392
a4b4766c
KM		 2393 err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
2394 ct, &tuple, &mask);
bd077937
PNA		 2395 if (err < 0)
2396 return err;
2397
2398 if (cda[CTA_EXPECT_HELP_NAME]) {
2399 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2400
2401 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2402 nf_ct_protonum(ct));
2403 if (helper == NULL)
2404 return -EOPNOTSUPP;
2405 }
2406
2407 exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
2408 helper, &tuple, &mask);
2409 if (IS_ERR(exp))
2410 return PTR_ERR(exp);
2411
2412 err = nf_ct_expect_related_report(exp, portid, report);
b18bcb00
LZ		 2413 nf_ct_expect_put(exp);
2414 return err;
bd077937
PNA		 2415}
2416
a4b4766c
KM		 2417static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
2418 enum ip_conntrack_info ctinfo, int diff)
b7bd1809
PNA		 2419{
2420 if (!(ct->status & IPS_NAT_MASK))
2421 return;
2422
2423 nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
2424}
2425
a4b4766c
KM		 2426static struct nfnl_ct_hook ctnetlink_glue_hook = {
2427 .get_ct = ctnetlink_glue_get_ct,
2428 .build_size = ctnetlink_glue_build_size,
2429 .build = ctnetlink_glue_build,
2430 .parse = ctnetlink_glue_parse,
2431 .attach_expect = ctnetlink_glue_attach_expect,
2432 .seq_adjust = ctnetlink_glue_seqadj,
9cb01766 2433};
83f3e94d 2434#endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */
9cb01766 2435
601e68e1
YH		 2436/***********************************************************************
2437 * EXPECT
2438 ***********************************************************************/
c1d10adb 2439
4054ff45
PNA		 2440static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
2441 const struct nf_conntrack_tuple *tuple,
2442 enum ctattr_expect type)
c1d10adb 2443{
df6fb868 2444 struct nlattr *nest_parms;
601e68e1 2445
df6fb868
PM		 2446 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
2447 if (!nest_parms)
2448 goto nla_put_failure;
c1d10adb 2449 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 2450 goto nla_put_failure;
2451 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 2452
2453 return 0;
2454
df6fb868 2455nla_put_failure:
c1d10adb 2456 return -1;
601e68e1 2457}
c1d10adb 2458
4054ff45
PNA		 2459static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
2460 const struct nf_conntrack_tuple *tuple,
2461 const struct nf_conntrack_tuple_mask *mask)
1cde6436
PNA		 2462{
2463 int ret;
2464 struct nf_conntrack_l3proto *l3proto;
605dcad6 2465 struct nf_conntrack_l4proto *l4proto;
d4156e8c 2466 struct nf_conntrack_tuple m;
df6fb868 2467 struct nlattr *nest_parms;
d4156e8c
PM		 2468
2469 memset(&m, 0xFF, sizeof(m));
d4156e8c 2470 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 2471 m.src.u.all = mask->src.u.all;
2472 m.dst.protonum = tuple->dst.protonum;
d4156e8c 2473
df6fb868
PM		 2474 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
2475 if (!nest_parms)
2476 goto nla_put_failure;
1cde6436 2477
3b988ece 2478 rcu_read_lock();
528a3a6f 2479 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 2480 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 2481 if (ret >= 0) {
2482 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
2483 tuple->dst.protonum);
d4156e8c 2484 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 2485 }
2486 rcu_read_unlock();
2487
1cde6436 2488 if (unlikely(ret < 0))
df6fb868 2489 goto nla_put_failure;
1cde6436 2490
df6fb868 2491 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 2492
2493 return 0;
2494
df6fb868 2495nla_put_failure:
1cde6436
PNA		 2496 return -1;
2497}
2498
c7232c99
PM		 2499static const union nf_inet_addr any_addr;
2500
bb5cf80e 2501static int
c1d10adb 2502ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2503 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2504{
2505 struct nf_conn *master = exp->master;
c1216382 2506 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 2507 struct nf_conn_help *help;
076a0ca0
PNA		 2508#ifdef CONFIG_NF_NAT_NEEDED
2509 struct nlattr *nest_parms;
2510 struct nf_conntrack_tuple nat_tuple = {};
2511#endif
544d5c7d
PNA		 2512 struct nf_ct_helper_expectfn *expfn;
2513
d978e5da
PM		 2514 if (timeout < 0)
2515 timeout = 0;
c1d10adb
PNA		 2516
2517 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 2518 goto nla_put_failure;
1cde6436 2519 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 2520 goto nla_put_failure;
c1d10adb
PNA		 2521 if (ctnetlink_exp_dump_tuple(skb,
2522 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2523 CTA_EXPECT_MASTER) < 0)
df6fb868 2524 goto nla_put_failure;
601e68e1 2525
076a0ca0 2526#ifdef CONFIG_NF_NAT_NEEDED
c7232c99
PM		 2527 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2528 exp->saved_proto.all) {
076a0ca0
PNA		 2529 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2530 if (!nest_parms)
2531 goto nla_put_failure;
2532
cc1eb431
DM		 2533 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2534 goto nla_put_failure;
076a0ca0
PNA		 2535
2536 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 2537 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 2538 nat_tuple.dst.protonum = nf_ct_protonum(master);
2539 nat_tuple.src.u = exp->saved_proto;
2540
2541 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2542 CTA_EXPECT_NAT_TUPLE) < 0)
2543 goto nla_put_failure;
2544 nla_nest_end(skb, nest_parms);
2545 }
2546#endif
cc1eb431
DM		 2547 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2548 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2549 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2550 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2551 goto nla_put_failure;
bc01befd
PNA		 2552 help = nfct_help(master);
2553 if (help) {
2554 struct nf_conntrack_helper *helper;
2555
2556 helper = rcu_dereference(help->helper);
cc1eb431
DM		 2557 if (helper &&
2558 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2559 goto nla_put_failure;
bc01befd 2560 }
544d5c7d 2561 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 2562 if (expfn != NULL &&
2563 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2564 goto nla_put_failure;
c1d10adb
PNA		 2565
2566 return 0;
601e68e1 2567
df6fb868 2568nla_put_failure:
c1d10adb
PNA		 2569 return -1;
2570}
2571
2572static int
15e47304 2573ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 2574 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2575{
2576 struct nlmsghdr *nlh;
2577 struct nfgenmsg *nfmsg;
15e47304 2578 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb 2579
dedb67c4 2580 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event);
15e47304 2581 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 2582 if (nlh == NULL)
2583 goto nlmsg_failure;
c1d10adb 2584
96bcf938 2585 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2586 nfmsg->nfgen_family = exp->tuple.src.l3num;
2587 nfmsg->version = NFNETLINK_V0;
2588 nfmsg->res_id = 0;
2589
2590 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2591 goto nla_put_failure;
c1d10adb 2592
96bcf938 2593 nlmsg_end(skb, nlh);
c1d10adb
PNA		 2594 return skb->len;
2595
2596nlmsg_failure:
df6fb868 2597nla_put_failure:
96bcf938 2598 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 2599 return -1;
2600}
2601
2602#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2603static int
2604ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 2605{
9592a5c0
AD		 2606 struct nf_conntrack_expect *exp = item->exp;
2607 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 2608 struct nlmsghdr *nlh;
2609 struct nfgenmsg *nfmsg;
c1d10adb 2610 struct sk_buff *skb;
ebbf41df 2611 unsigned int type, group;
c1d10adb
PNA		 2612 int flags = 0;
2613
ebbf41df
PNA		 2614 if (events & (1 << IPEXP_DESTROY)) {
2615 type = IPCTNL_MSG_EXP_DELETE;
2616 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2617 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 2618 type = IPCTNL_MSG_EXP_NEW;
2619 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 2620 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 2621 } else
e34d5c1a 2622 return 0;
c1d10adb 2623
ebbf41df 2624 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 2625 return 0;
b3a27bfb 2626
96bcf938
PNA		 2627 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2628 if (skb == NULL)
150ace0d 2629 goto errout;
c1d10adb 2630
dedb67c4 2631 type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type);
15e47304 2632 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 2633 if (nlh == NULL)
2634 goto nlmsg_failure;
c1d10adb 2635
96bcf938 2636 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2637 nfmsg->nfgen_family = exp->tuple.src.l3num;
2638 nfmsg->version = NFNETLINK_V0;
2639 nfmsg->res_id = 0;
2640
528a3a6f 2641 rcu_read_lock();
c1d10adb 2642 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2643 goto nla_put_failure;
528a3a6f 2644 rcu_read_unlock();
c1d10adb 2645
96bcf938 2646 nlmsg_end(skb, nlh);
15e47304 2647 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 2648 return 0;
c1d10adb 2649
df6fb868 2650nla_put_failure:
528a3a6f 2651 rcu_read_unlock();
96bcf938 2652 nlmsg_cancel(skb, nlh);
528a3a6f 2653nlmsg_failure:
c1d10adb 2654 kfree_skb(skb);
150ace0d 2655errout:
9592a5c0 2656 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 2657 return 0;
c1d10adb
PNA		 2658}
2659#endif
cf6994c2
PM		 2660static int ctnetlink_exp_done(struct netlink_callback *cb)
2661{
31f15875
PM		 2662 if (cb->args[1])
2663 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2664 return 0;
2665}
c1d10adb
PNA		 2666
2667static int
2668ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2669{
9592a5c0 2670 struct net *net = sock_net(skb->sk);
cf6994c2 2671 struct nf_conntrack_expect *exp, *last;
96bcf938 2672 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 2673 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2674
7d0742da 2675 rcu_read_lock();
31f15875
PM		 2676 last = (struct nf_conntrack_expect *)cb->args[1];
2677 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2678restart:
0a93aaed 2679 hlist_for_each_entry(exp, &nf_ct_expect_hash[cb->args[0]],
31f15875
PM		 2680 hnode) {
2681 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2682 continue;
03d7dc5c
FW		 2683
2684 if (!net_eq(nf_ct_net(exp->master), net))
2685 continue;
2686
31f15875
PM		 2687 if (cb->args[1]) {
2688 if (exp != last)
2689 continue;
2690 cb->args[1] = 0;
2691 }
8b0a231d 2692 if (ctnetlink_exp_fill_info(skb,
15e47304 2693 NETLINK_CB(cb->skb).portid,
31f15875
PM		 2694 cb->nlh->nlmsg_seq,
2695 IPCTNL_MSG_EXP_NEW,
8b0a231d 2696 exp) < 0) {
b54ab92b 2697 if (!refcount_inc_not_zero(&exp->use))
7d0742da 2698 continue;
31f15875
PM		 2699 cb->args[1] = (unsigned long)exp;
2700 goto out;
2701 }
cf6994c2 2702 }
31f15875
PM		 2703 if (cb->args[1]) {
2704 cb->args[1] = 0;
2705 goto restart;
cf6994c2
PM		 2706 }
2707 }
601e68e1 2708out:
7d0742da 2709 rcu_read_unlock();
cf6994c2
PM		 2710 if (last)
2711 nf_ct_expect_put(last);
c1d10adb 2712
c1d10adb
PNA		 2713 return skb->len;
2714}
2715
e844a928
PNA		 2716static int
2717ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2718{
2719 struct nf_conntrack_expect *exp, *last;
2720 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
2721 struct nf_conn *ct = cb->data;
2722 struct nf_conn_help *help = nfct_help(ct);
2723 u_int8_t l3proto = nfmsg->nfgen_family;
2724
2725 if (cb->args[0])
2726 return 0;
2727
2728 rcu_read_lock();
2729 last = (struct nf_conntrack_expect *)cb->args[1];
2730restart:
2731 hlist_for_each_entry(exp, &help->expectations, lnode) {
2732 if (l3proto && exp->tuple.src.l3num != l3proto)
2733 continue;
2734 if (cb->args[1]) {
2735 if (exp != last)
2736 continue;
2737 cb->args[1] = 0;
2738 }
2739 if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
2740 cb->nlh->nlmsg_seq,
2741 IPCTNL_MSG_EXP_NEW,
2742 exp) < 0) {
b54ab92b 2743 if (!refcount_inc_not_zero(&exp->use))
e844a928
PNA		 2744 continue;
2745 cb->args[1] = (unsigned long)exp;
2746 goto out;
2747 }
2748 }
2749 if (cb->args[1]) {
2750 cb->args[1] = 0;
2751 goto restart;
2752 }
2753 cb->args[0] = 1;
2754out:
2755 rcu_read_unlock();
2756 if (last)
2757 nf_ct_expect_put(last);
2758
2759 return skb->len;
2760}
2761
7b8002a1
PNA		 2762static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
2763 struct sk_buff *skb,
e844a928
PNA		 2764 const struct nlmsghdr *nlh,
2765 const struct nlattr * const cda[])
2766{
2767 int err;
e844a928
PNA		 2768 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
2769 u_int8_t u3 = nfmsg->nfgen_family;
2770 struct nf_conntrack_tuple tuple;
2771 struct nf_conntrack_tuple_hash *h;
2772 struct nf_conn *ct;
308ac914 2773 struct nf_conntrack_zone zone;
e844a928
PNA		 2774 struct netlink_dump_control c = {
2775 .dump = ctnetlink_exp_ct_dump_table,
2776 .done = ctnetlink_exp_done,
2777 };
2778
deedb590
DB		 2779 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2780 u3, NULL);
e844a928
PNA		 2781 if (err < 0)
2782 return err;
2783
308ac914
DB		 2784 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2785 if (err < 0)
2786 return err;
e844a928 2787
308ac914 2788 h = nf_conntrack_find_get(net, &zone, &tuple);
e844a928
PNA		 2789 if (!h)
2790 return -ENOENT;
2791
2792 ct = nf_ct_tuplehash_to_ctrack(h);
2793 c.data = ct;
2794
2795 err = netlink_dump_start(ctnl, skb, nlh, &c);
2796 nf_ct_put(ct);
2797
2798 return err;
2799}
2800
7b8002a1
PNA		 2801static int ctnetlink_get_expect(struct net *net, struct sock *ctnl,
2802 struct sk_buff *skb, const struct nlmsghdr *nlh,
2803 const struct nlattr * const cda[])
c1d10adb
PNA		 2804{
2805 struct nf_conntrack_tuple tuple;
2806 struct nf_conntrack_expect *exp;
2807 struct sk_buff *skb2;
96bcf938 2808 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2809 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 2810 struct nf_conntrack_zone zone;
ef00f89f 2811 int err;
c1d10adb 2812
b8f3ab42 2813 if (nlh->nlmsg_flags & NLM_F_DUMP) {
e844a928 2814 if (cda[CTA_EXPECT_MASTER])
7b8002a1 2815 return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda);
e844a928
PNA		 2816 else {
2817 struct netlink_dump_control c = {
2818 .dump = ctnetlink_exp_dump_table,
2819 .done = ctnetlink_exp_done,
2820 };
2821 return netlink_dump_start(ctnl, skb, nlh, &c);
2822 }
c1d10adb
PNA		 2823 }
2824
ef00f89f
PM		 2825 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2826 if (err < 0)
2827 return err;
2828
35dba1d7 2829 if (cda[CTA_EXPECT_TUPLE])
deedb590
DB		 2830 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2831 u3, NULL);
35dba1d7 2832 else if (cda[CTA_EXPECT_MASTER])
deedb590
DB		 2833 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
2834 u3, NULL);
c1d10adb
PNA		 2835 else
2836 return -EINVAL;
2837
2838 if (err < 0)
2839 return err;
2840
308ac914 2841 exp = nf_ct_expect_find_get(net, &zone, &tuple);
c1d10adb
PNA		 2842 if (!exp)
2843 return -ENOENT;
2844
df6fb868 2845 if (cda[CTA_EXPECT_ID]) {
77236b6e 2846 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2847 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2848 nf_ct_expect_put(exp);
c1d10adb
PNA		 2849 return -ENOENT;
2850 }
601e68e1 2851 }
c1d10adb
PNA		 2852
2853 err = -ENOMEM;
96bcf938 2854 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2855 if (skb2 == NULL) {
2856 nf_ct_expect_put(exp);
c1d10adb 2857 goto out;
81378f72 2858 }
4e9b8269 2859
528a3a6f 2860 rcu_read_lock();
15e47304 2861 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
8b0a231d 2862 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2863 rcu_read_unlock();
81378f72 2864 nf_ct_expect_put(exp);
c1d10adb
PNA		 2865 if (err <= 0)
2866 goto free;
2867
15e47304 2868 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
81378f72
PNA		 2869 if (err < 0)
2870 goto out;
c1d10adb 2871
81378f72 2872 return 0;
c1d10adb
PNA		 2873
2874free:
2875 kfree_skb(skb2);
2876out:
81378f72
PNA		 2877 /* this avoids a loop in nfnetlink. */
2878 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2879}
2880
7b8002a1
PNA		 2881static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
2882 struct sk_buff *skb, const struct nlmsghdr *nlh,
2883 const struct nlattr * const cda[])
c1d10adb 2884{
31f15875 2885 struct nf_conntrack_expect *exp;
c1d10adb 2886 struct nf_conntrack_tuple tuple;
96bcf938 2887 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
b67bfe0d 2888 struct hlist_node *next;
c1d10adb 2889 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 2890 struct nf_conntrack_zone zone;
31f15875 2891 unsigned int i;
c1d10adb
PNA		 2892 int err;
2893
df6fb868 2894 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2895 /* delete a single expect by tuple */
ef00f89f
PM		 2896 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2897 if (err < 0)
2898 return err;
2899
deedb590
DB		 2900 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
2901 u3, NULL);
c1d10adb
PNA		 2902 if (err < 0)
2903 return err;
2904
2905 /* bump usage count to 2 */
308ac914 2906 exp = nf_ct_expect_find_get(net, &zone, &tuple);
c1d10adb
PNA		 2907 if (!exp)
2908 return -ENOENT;
2909
df6fb868 2910 if (cda[CTA_EXPECT_ID]) {
77236b6e 2911 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2912 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2913 nf_ct_expect_put(exp);
c1d10adb
PNA		 2914 return -ENOENT;
2915 }
2916 }
2917
2918 /* after list removal, usage count == 1 */
ca7433df 2919 spin_lock_bh(&nf_conntrack_expect_lock);
ebbf41df 2920 if (del_timer(&exp->timeout)) {
15e47304 2921 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
ebbf41df
PNA		 2922 nlmsg_report(nlh));
2923 nf_ct_expect_put(exp);
2924 }
ca7433df 2925 spin_unlock_bh(&nf_conntrack_expect_lock);
601e68e1 2926 /* have to put what we 'get' above.
c1d10adb 2927 * after this line usage count == 0 */
6823645d 2928 nf_ct_expect_put(exp);
df6fb868
PM		 2929 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2930 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
31f15875 2931 struct nf_conn_help *m_help;
c1d10adb
PNA		 2932
2933 /* delete all expectations for this helper */
ca7433df 2934 spin_lock_bh(&nf_conntrack_expect_lock);
31f15875 2935 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2936 hlist_for_each_entry_safe(exp, next,
0a93aaed 2937 &nf_ct_expect_hash[i],
31f15875 2938 hnode) {
03d7dc5c
FW		 2939
2940 if (!net_eq(nf_ct_exp_net(exp), net))
2941 continue;
2942
31f15875 2943 m_help = nfct_help(exp->master);
794e6871
PM		 2944 if (!strcmp(m_help->helper->name, name) &&
2945 del_timer(&exp->timeout)) {
ebbf41df 2946 nf_ct_unlink_expect_report(exp,
15e47304 2947 NETLINK_CB(skb).portid,
ebbf41df 2948 nlmsg_report(nlh));
31f15875
PM		 2949 nf_ct_expect_put(exp);
2950 }
c1d10adb
PNA		 2951 }
2952 }
ca7433df 2953 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb
PNA		 2954 } else {
2955 /* This basically means we have to flush everything*/
ca7433df 2956 spin_lock_bh(&nf_conntrack_expect_lock);
31f15875 2957 for (i = 0; i < nf_ct_expect_hsize; i++) {
b67bfe0d 2958 hlist_for_each_entry_safe(exp, next,
0a93aaed 2959 &nf_ct_expect_hash[i],
31f15875 2960 hnode) {
03d7dc5c
FW		 2961
2962 if (!net_eq(nf_ct_exp_net(exp), net))
2963 continue;
2964
31f15875 2965 if (del_timer(&exp->timeout)) {
ebbf41df 2966 nf_ct_unlink_expect_report(exp,
15e47304 2967 NETLINK_CB(skb).portid,
ebbf41df 2968 nlmsg_report(nlh));
31f15875
PM		 2969 nf_ct_expect_put(exp);
2970 }
c1d10adb
PNA		 2971 }
2972 }
ca7433df 2973 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb
PNA		 2974 }
2975
2976 return 0;
2977}
2978static int
39938324
PM		 2979ctnetlink_change_expect(struct nf_conntrack_expect *x,
2980 const struct nlattr * const cda[])
c1d10adb 2981{
9768e1ac
KW		 2982 if (cda[CTA_EXPECT_TIMEOUT]) {
2983 if (!del_timer(&x->timeout))
2984 return -ETIME;
2985
2986 x->timeout.expires = jiffies +
2987 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2988 add_timer(&x->timeout);
2989 }
2990 return 0;
c1d10adb
PNA		 2991}
2992
076a0ca0
PNA		 2993static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2994 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2995 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2996};
2997
2998static int
2999ctnetlink_parse_expect_nat(const struct nlattr *attr,
3000 struct nf_conntrack_expect *exp,
3001 u_int8_t u3)
3002{
3003#ifdef CONFIG_NF_NAT_NEEDED
3004 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
3005 struct nf_conntrack_tuple nat_tuple = {};
3006 int err;
3007
130ffbc2
DB		 3008 err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
3009 if (err < 0)
3010 return err;
076a0ca0
PNA		 3011
3012 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
3013 return -EINVAL;
3014
3015 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
deedb590
DB		 3016 &nat_tuple, CTA_EXPECT_NAT_TUPLE,
3017 u3, NULL);
076a0ca0
PNA		 3018 if (err < 0)
3019 return err;
3020
c7232c99 3021 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 3022 exp->saved_proto = nat_tuple.src.u;
3023 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
3024
3025 return 0;
3026#else
3027 return -EOPNOTSUPP;
3028#endif
3029}
3030
0ef71ee1
PNA		 3031static struct nf_conntrack_expect *
3032ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
3033 struct nf_conntrack_helper *helper,
3034 struct nf_conntrack_tuple *tuple,
3035 struct nf_conntrack_tuple *mask)
c1d10adb 3036{
0ef71ee1 3037 u_int32_t class = 0;
c1d10adb 3038 struct nf_conntrack_expect *exp;
dc808fe2 3039 struct nf_conn_help *help;
0ef71ee1 3040 int err;
660fdb2a 3041
2c62e0bc
GF		 3042 help = nfct_help(ct);
3043 if (!help)
3044 return ERR_PTR(-EOPNOTSUPP);
3045
b8c5e52c
PNA		 3046 if (cda[CTA_EXPECT_CLASS] && helper) {
3047 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
0ef71ee1
PNA		 3048 if (class > helper->expect_class_max)
3049 return ERR_PTR(-EINVAL);
b8c5e52c 3050 }
6823645d 3051 exp = nf_ct_expect_alloc(ct);
0ef71ee1
PNA		 3052 if (!exp)
3053 return ERR_PTR(-ENOMEM);
3054
2c62e0bc
GF		 3055 if (cda[CTA_EXPECT_FLAGS]) {
3056 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
3057 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
bc01befd 3058 } else {
2c62e0bc 3059 exp->flags = 0;
bc01befd 3060 }
544d5c7d
PNA		 3061 if (cda[CTA_EXPECT_FN]) {
3062 const char *name = nla_data(cda[CTA_EXPECT_FN]);
3063 struct nf_ct_helper_expectfn *expfn;
3064
3065 expfn = nf_ct_helper_expectfn_find_by_name(name);
3066 if (expfn == NULL) {
3067 err = -EINVAL;
3068 goto err_out;
3069 }
3070 exp->expectfn = expfn->expectfn;
3071 } else
3072 exp->expectfn = NULL;
601e68e1 3073
b8c5e52c 3074 exp->class = class;
c1d10adb 3075 exp->master = ct;
660fdb2a 3076 exp->helper = helper;
0ef71ee1
PNA		 3077 exp->tuple = *tuple;
3078 exp->mask.src.u3 = mask->src.u3;
3079 exp->mask.src.u.all = mask->src.u.all;
c1d10adb 3080
076a0ca0
PNA		 3081 if (cda[CTA_EXPECT_NAT]) {
3082 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
0ef71ee1 3083 exp, nf_ct_l3num(ct));
076a0ca0
PNA		 3084 if (err < 0)
3085 goto err_out;
3086 }
0ef71ee1 3087 return exp;
076a0ca0 3088err_out:
6823645d 3089 nf_ct_expect_put(exp);
0ef71ee1
PNA		 3090 return ERR_PTR(err);
3091}
3092
3093static int
308ac914
DB		 3094ctnetlink_create_expect(struct net *net,
3095 const struct nf_conntrack_zone *zone,
0ef71ee1
PNA		 3096 const struct nlattr * const cda[],
3097 u_int8_t u3, u32 portid, int report)
3098{
3099 struct nf_conntrack_tuple tuple, mask, master_tuple;
3100 struct nf_conntrack_tuple_hash *h = NULL;
3101 struct nf_conntrack_helper *helper = NULL;
3102 struct nf_conntrack_expect *exp;
3103 struct nf_conn *ct;
3104 int err;
3105
3106 /* caller guarantees that those three CTA_EXPECT_* exist */
deedb590
DB		 3107 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3108 u3, NULL);
0ef71ee1
PNA		 3109 if (err < 0)
3110 return err;
deedb590
DB		 3111 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
3112 u3, NULL);
0ef71ee1
PNA		 3113 if (err < 0)
3114 return err;
deedb590
DB		 3115 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
3116 u3, NULL);
0ef71ee1
PNA		 3117 if (err < 0)
3118 return err;
3119
3120 /* Look for master conntrack of this expectation */
3121 h = nf_conntrack_find_get(net, zone, &master_tuple);
3122 if (!h)
3123 return -ENOENT;
3124 ct = nf_ct_tuplehash_to_ctrack(h);
3125
3126 if (cda[CTA_EXPECT_HELP_NAME]) {
3127 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
3128
3129 helper = __nf_conntrack_helper_find(helpname, u3,
3130 nf_ct_protonum(ct));
3131 if (helper == NULL) {
3132#ifdef CONFIG_MODULES
3133 if (request_module("nfct-helper-%s", helpname) < 0) {
3134 err = -EOPNOTSUPP;
3135 goto err_ct;
3136 }
3137 helper = __nf_conntrack_helper_find(helpname, u3,
3138 nf_ct_protonum(ct));
3139 if (helper) {
3140 err = -EAGAIN;
3141 goto err_ct;
3142 }
3143#endif
3144 err = -EOPNOTSUPP;
3145 goto err_ct;
3146 }
3147 }
3148
3149 exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
3150 if (IS_ERR(exp)) {
3151 err = PTR_ERR(exp);
3152 goto err_ct;
3153 }
3154
3155 err = nf_ct_expect_related_report(exp, portid, report);
0ef71ee1
PNA		 3156 nf_ct_expect_put(exp);
3157err_ct:
3158 nf_ct_put(ct);
c1d10adb
PNA		 3159 return err;
3160}
3161
7b8002a1
PNA		 3162static int ctnetlink_new_expect(struct net *net, struct sock *ctnl,
3163 struct sk_buff *skb, const struct nlmsghdr *nlh,
3164 const struct nlattr * const cda[])
c1d10adb
PNA		 3165{
3166 struct nf_conntrack_tuple tuple;
3167 struct nf_conntrack_expect *exp;
96bcf938 3168 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 3169 u_int8_t u3 = nfmsg->nfgen_family;
308ac914 3170 struct nf_conntrack_zone zone;
ef00f89f 3171 int err;
c1d10adb 3172
df6fb868
PM		 3173 if (!cda[CTA_EXPECT_TUPLE]
3174 || !cda[CTA_EXPECT_MASK]
3175 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 3176 return -EINVAL;
3177
ef00f89f
PM		 3178 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
3179 if (err < 0)
3180 return err;
3181
deedb590
DB		 3182 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
3183 u3, NULL);
c1d10adb
PNA		 3184 if (err < 0)
3185 return err;
3186
ca7433df 3187 spin_lock_bh(&nf_conntrack_expect_lock);
308ac914 3188 exp = __nf_ct_expect_find(net, &zone, &tuple);
c1d10adb 3189 if (!exp) {
ca7433df 3190 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3191 err = -ENOENT;
19abb7b0 3192 if (nlh->nlmsg_flags & NLM_F_CREATE) {
308ac914 3193 err = ctnetlink_create_expect(net, &zone, cda, u3,
15e47304 3194 NETLINK_CB(skb).portid,
19abb7b0
PNA		 3195 nlmsg_report(nlh));
3196 }
c1d10adb
PNA		 3197 return err;
3198 }
3199
3200 err = -EEXIST;
3201 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
3202 err = ctnetlink_change_expect(exp, cda);
ca7433df 3203 spin_unlock_bh(&nf_conntrack_expect_lock);
c1d10adb 3204
c1d10adb
PNA		 3205 return err;
3206}
3207
392025f8 3208static int
15e47304 3209ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 3210 const struct ip_conntrack_stat *st)
3211{
3212 struct nlmsghdr *nlh;
3213 struct nfgenmsg *nfmsg;
15e47304 3214 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8 3215
dedb67c4
PNA		 3216 event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
3217 IPCTNL_MSG_EXP_GET_STATS_CPU);
15e47304 3218 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 3219 if (nlh == NULL)
3220 goto nlmsg_failure;
3221
3222 nfmsg = nlmsg_data(nlh);
3223 nfmsg->nfgen_family = AF_UNSPEC;
3224 nfmsg->version = NFNETLINK_V0;
3225 nfmsg->res_id = htons(cpu);
3226
3227 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
3228 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
3229 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
3230 goto nla_put_failure;
3231
3232 nlmsg_end(skb, nlh);
3233 return skb->len;
3234
3235nla_put_failure:
3236nlmsg_failure:
3237 nlmsg_cancel(skb, nlh);
3238 return -1;
3239}
3240
3241static int
3242ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
3243{
3244 int cpu;
3245 struct net *net = sock_net(skb->sk);
3246
3247 if (cb->args[0] == nr_cpu_ids)
3248 return 0;
3249
3250 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
3251 const struct ip_conntrack_stat *st;
3252
3253 if (!cpu_possible(cpu))
3254 continue;
3255
3256 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 3257 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 3258 cb->nlh->nlmsg_seq,
3259 cpu, st) < 0)
3260 break;
3261 }
3262 cb->args[0] = cpu;
3263
3264 return skb->len;
3265}
3266
7b8002a1
PNA		 3267static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl,
3268 struct sk_buff *skb,
3269 const struct nlmsghdr *nlh,
3270 const struct nlattr * const cda[])
392025f8
PNA		 3271{
3272 if (nlh->nlmsg_flags & NLM_F_DUMP) {
3273 struct netlink_dump_control c = {
3274 .dump = ctnetlink_exp_stat_cpu_dump,
3275 };
3276 return netlink_dump_start(ctnl, skb, nlh, &c);
3277 }
3278
3279 return 0;
3280}
3281
c1d10adb 3282#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 3283static struct nf_ct_event_notifier ctnl_notifier = {
3284 .fcn = ctnetlink_conntrack_event,
c1d10adb
PNA		 3285};
3286
e34d5c1a
PNA		 3287static struct nf_exp_event_notifier ctnl_notifier_exp = {
3288 .fcn = ctnetlink_expect_event,
c1d10adb
PNA		 3289};
3290#endif
3291
7c8d4cb4 3292static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
c1d10adb 3293 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
f73e924c
PM		 3294 .attr_count = CTA_MAX,
3295 .policy = ct_nla_policy },
c1d10adb 3296 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3297 .attr_count = CTA_MAX,
3298 .policy = ct_nla_policy },
c1d10adb 3299 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
f73e924c
PM		 3300 .attr_count = CTA_MAX,
3301 .policy = ct_nla_policy },
c1d10adb 3302 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 3303 .attr_count = CTA_MAX,
3304 .policy = ct_nla_policy },
392025f8
PNA		 3305 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
3306 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
d871befe
PNA		 3307 [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying },
3308 [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed },
c1d10adb
PNA		 3309};
3310
7c8d4cb4 3311static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
c1d10adb 3312 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
f73e924c
PM		 3313 .attr_count = CTA_EXPECT_MAX,
3314 .policy = exp_nla_policy },
c1d10adb 3315 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
f73e924c
PM		 3316 .attr_count = CTA_EXPECT_MAX,
3317 .policy = exp_nla_policy },
c1d10adb 3318 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
f73e924c
PM		 3319 .attr_count = CTA_EXPECT_MAX,
3320 .policy = exp_nla_policy },
392025f8 3321 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
c1d10adb
PNA		 3322};
3323
7c8d4cb4 3324static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 3325 .name = "conntrack",
3326 .subsys_id = NFNL_SUBSYS_CTNETLINK,
3327 .cb_count = IPCTNL_MSG_MAX,
3328 .cb = ctnl_cb,
3329};
3330
7c8d4cb4 3331static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 3332 .name = "conntrack_expect",
3333 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
3334 .cb_count = IPCTNL_MSG_EXP_MAX,
3335 .cb = ctnl_exp_cb,
3336};
3337
d2483dde 3338MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 3339MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 3340MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 3341
70e9942f
PNA		 3342static int __net_init ctnetlink_net_init(struct net *net)
3343{
3344#ifdef CONFIG_NF_CONNTRACK_EVENTS
3345 int ret;
3346
3347 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
3348 if (ret < 0) {
3349 pr_err("ctnetlink_init: cannot register notifier.\n");
3350 goto err_out;
3351 }
3352
3353 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
3354 if (ret < 0) {
3355 pr_err("ctnetlink_init: cannot expect register notifier.\n");
3356 goto err_unreg_notifier;
3357 }
3358#endif
3359 return 0;
3360
3361#ifdef CONFIG_NF_CONNTRACK_EVENTS
3362err_unreg_notifier:
3363 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3364err_out:
3365 return ret;
3366#endif
3367}
3368
3369static void ctnetlink_net_exit(struct net *net)
3370{
3371#ifdef CONFIG_NF_CONNTRACK_EVENTS
3372 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
3373 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
3374#endif
3375}
3376
3377static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
3378{
3379 struct net *net;
3380
3381 list_for_each_entry(net, net_exit_list, exit_list)
3382 ctnetlink_net_exit(net);
3383}
3384
3385static struct pernet_operations ctnetlink_net_ops = {
3386 .init = ctnetlink_net_init,
3387 .exit_batch = ctnetlink_net_exit_batch,
3388};
3389
c1d10adb
PNA		 3390static int __init ctnetlink_init(void)
3391{
3392 int ret;
3393
654d0fbd 3394 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
c1d10adb
PNA		 3395 ret = nfnetlink_subsys_register(&ctnl_subsys);
3396 if (ret < 0) {
654d0fbd 3397 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 3398 goto err_out;
3399 }
3400
3401 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
3402 if (ret < 0) {
654d0fbd 3403 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 3404 goto err_unreg_subsys;
3405 }
3406
ef6acf68
JL		 3407 ret = register_pernet_subsys(&ctnetlink_net_ops);
3408 if (ret < 0) {
70e9942f 3409 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 3410 goto err_unreg_exp_subsys;
3411 }
83f3e94d 3412#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
9cb01766 3413 /* setup interaction between nf_queue and nf_conntrack_netlink. */
a4b4766c 3414 RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook);
9cb01766 3415#endif
c1d10adb
PNA		 3416 return 0;
3417
c1d10adb
PNA		 3418err_unreg_exp_subsys:
3419 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 3420err_unreg_subsys:
3421 nfnetlink_subsys_unregister(&ctnl_subsys);
3422err_out:
3423 return ret;
3424}
3425
3426static void __exit ctnetlink_exit(void)
3427{
654d0fbd 3428 pr_info("ctnetlink: unregistering from nfnetlink.\n");
c1d10adb 3429
70e9942f 3430 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 3431 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
3432 nfnetlink_subsys_unregister(&ctnl_subsys);
83f3e94d 3433#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
a4b4766c 3434 RCU_INIT_POINTER(nfnl_ct_hook, NULL);
9cb01766 3435#endif
3b7dabf0 3436 synchronize_rcu();
c1d10adb
PNA		 3437}
3438
3439module_init(ctnetlink_init);
3440module_exit(ctnetlink_exit);
Ubuntu Artful kernel mirror