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netfilter: nf_conntrack: improve nf_conn object traceability
[deliverable/linux.git] / net / netfilter / nf_conntrack_netlink.c
CommitLineData
c1d10adb
PNA		 1/* Connection tracking via netlink socket. Allows for user space
2 * protocol helpers and general trouble making from userspace.
3 *
4 * (C) 2001 by Jay Schulist <jschlst@samba.org>
dc808fe2 5 * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
c1d10adb 6 * (C) 2003 by Patrick Mchardy <kaber@trash.net>
392025f8 7 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
c1d10adb 8 *
601e68e1 9 * Initial connection tracking via netlink development funded and
c1d10adb
PNA		 10 * generally made possible by Network Robots, Inc. (www.networkrobots.com)
11 *
12 * Further development of this code funded by Astaro AG (http://www.astaro.com)
13 *
14 * This software may be used and distributed according to the terms
15 * of the GNU General Public License, incorporated herein by reference.
c1d10adb
PNA		 16 */
17
18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
711bbdd6 21#include <linux/rculist.h>
ea781f19 22#include <linux/rculist_nulls.h>
c1d10adb
PNA		 23#include <linux/types.h>
24#include <linux/timer.h>
1cc63249 25#include <linux/security.h>
c1d10adb
PNA		 26#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/netlink.h>
29#include <linux/spinlock.h>
40a839fd 30#include <linux/interrupt.h>
5a0e3ad6 31#include <linux/slab.h>
c1d10adb
PNA		 32
33#include <linux/netfilter.h>
dc5fc579 34#include <net/netlink.h>
9592a5c0 35#include <net/sock.h>
c1d10adb
PNA		 36#include <net/netfilter/nf_conntrack.h>
37#include <net/netfilter/nf_conntrack_core.h>
77ab9cff 38#include <net/netfilter/nf_conntrack_expect.h>
c1d10adb
PNA		 39#include <net/netfilter/nf_conntrack_helper.h>
40#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6 41#include <net/netfilter/nf_conntrack_l4proto.h>
5b1158e9 42#include <net/netfilter/nf_conntrack_tuple.h>
58401572 43#include <net/netfilter/nf_conntrack_acct.h>
ef00f89f 44#include <net/netfilter/nf_conntrack_zones.h>
a992ca2a 45#include <net/netfilter/nf_conntrack_timestamp.h>
5b1158e9
JK		 46#ifdef CONFIG_NF_NAT_NEEDED
47#include <net/netfilter/nf_nat_core.h>
c7232c99 48#include <net/netfilter/nf_nat_l4proto.h>
8c88f87c 49#include <net/netfilter/nf_nat_helper.h>
5b1158e9 50#endif
c1d10adb
PNA		 51
52#include <linux/netfilter/nfnetlink.h>
53#include <linux/netfilter/nfnetlink_conntrack.h>
54
55MODULE_LICENSE("GPL");
56
dc808fe2 57static char __initdata version[] = "0.93";
c1d10adb 58
c1d10adb 59static inline int
601e68e1 60ctnetlink_dump_tuples_proto(struct sk_buff *skb,
1cde6436 61 const struct nf_conntrack_tuple *tuple,
605dcad6 62 struct nf_conntrack_l4proto *l4proto)
c1d10adb 63{
c1d10adb 64 int ret = 0;
df6fb868 65 struct nlattr *nest_parms;
c1d10adb 66
df6fb868
PM		 67 nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED);
68 if (!nest_parms)
69 goto nla_put_failure;
cc1eb431
DM		 70 if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
71 goto nla_put_failure;
c1d10adb 72
fdf70832
PM		 73 if (likely(l4proto->tuple_to_nlattr))
74 ret = l4proto->tuple_to_nlattr(skb, tuple);
601e68e1 75
df6fb868 76 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 77
78 return ret;
79
df6fb868 80nla_put_failure:
c1d10adb
PNA		 81 return -1;
82}
83
84static inline int
1cde6436
PNA		 85ctnetlink_dump_tuples_ip(struct sk_buff *skb,
86 const struct nf_conntrack_tuple *tuple,
87 struct nf_conntrack_l3proto *l3proto)
c1d10adb 88{
c1d10adb 89 int ret = 0;
df6fb868
PM		 90 struct nlattr *nest_parms;
91
92 nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED);
93 if (!nest_parms)
94 goto nla_put_failure;
1cde6436 95
fdf70832
PM		 96 if (likely(l3proto->tuple_to_nlattr))
97 ret = l3proto->tuple_to_nlattr(skb, tuple);
1cde6436 98
df6fb868 99 nla_nest_end(skb, nest_parms);
c1d10adb 100
1cde6436
PNA		 101 return ret;
102
df6fb868 103nla_put_failure:
1cde6436
PNA		 104 return -1;
105}
106
bb5cf80e 107static int
1cde6436
PNA		 108ctnetlink_dump_tuples(struct sk_buff *skb,
109 const struct nf_conntrack_tuple *tuple)
110{
111 int ret;
112 struct nf_conntrack_l3proto *l3proto;
605dcad6 113 struct nf_conntrack_l4proto *l4proto;
1cde6436 114
3b988ece 115 rcu_read_lock();
528a3a6f 116 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
1cde6436 117 ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
c1d10adb 118
3b988ece
HS		 119 if (ret >= 0) {
120 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
121 tuple->dst.protonum);
122 ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
123 }
124 rcu_read_unlock();
c1d10adb 125 return ret;
c1d10adb
PNA		 126}
127
128static inline int
129ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
130{
cc1eb431
DM		 131 if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
132 goto nla_put_failure;
c1d10adb
PNA		 133 return 0;
134
df6fb868 135nla_put_failure:
c1d10adb
PNA		 136 return -1;
137}
138
139static inline int
140ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
141{
c1216382 142 long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ;
c1d10adb 143
77236b6e 144 if (timeout < 0)
c1d10adb 145 timeout = 0;
601e68e1 146
cc1eb431
DM		 147 if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
148 goto nla_put_failure;
c1d10adb
PNA		 149 return 0;
150
df6fb868 151nla_put_failure:
c1d10adb
PNA		 152 return -1;
153}
154
155static inline int
440f0d58 156ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
c1d10adb 157{
5e8fbe2a 158 struct nf_conntrack_l4proto *l4proto;
df6fb868 159 struct nlattr *nest_proto;
c1d10adb
PNA		 160 int ret;
161
528a3a6f
PNA		 162 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
163 if (!l4proto->to_nlattr)
c1d10adb 164 return 0;
601e68e1 165
df6fb868
PM		 166 nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED);
167 if (!nest_proto)
168 goto nla_put_failure;
c1d10adb 169
fdf70832 170 ret = l4proto->to_nlattr(skb, nest_proto, ct);
c1d10adb 171
df6fb868 172 nla_nest_end(skb, nest_proto);
c1d10adb
PNA		 173
174 return ret;
175
df6fb868 176nla_put_failure:
c1d10adb
PNA		 177 return -1;
178}
179
180static inline int
181ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
182{
df6fb868 183 struct nlattr *nest_helper;
dc808fe2 184 const struct nf_conn_help *help = nfct_help(ct);
3c158f7f 185 struct nf_conntrack_helper *helper;
c1d10adb 186
3c158f7f 187 if (!help)
c1d10adb 188 return 0;
601e68e1 189
3c158f7f
PM		 190 helper = rcu_dereference(help->helper);
191 if (!helper)
192 goto out;
193
df6fb868
PM		 194 nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED);
195 if (!nest_helper)
196 goto nla_put_failure;
cc1eb431
DM		 197 if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
198 goto nla_put_failure;
c1d10adb 199
fdf70832
PM		 200 if (helper->to_nlattr)
201 helper->to_nlattr(skb, ct);
c1d10adb 202
df6fb868 203 nla_nest_end(skb, nest_helper);
3c158f7f 204out:
c1d10adb
PNA		 205 return 0;
206
df6fb868 207nla_put_failure:
c1d10adb
PNA		 208 return -1;
209}
210
bb5cf80e 211static int
80e60e67
PNA		 212dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes,
213 enum ip_conntrack_dir dir)
c1d10adb
PNA		 214{
215 enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
df6fb868 216 struct nlattr *nest_count;
c1d10adb 217
df6fb868
PM		 218 nest_count = nla_nest_start(skb, type | NLA_F_NESTED);
219 if (!nest_count)
220 goto nla_put_failure;
221
cc1eb431
DM		 222 if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) ||
223 nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes)))
224 goto nla_put_failure;
c1d10adb 225
df6fb868 226 nla_nest_end(skb, nest_count);
c1d10adb
PNA		 227
228 return 0;
229
df6fb868 230nla_put_failure:
c1d10adb
PNA		 231 return -1;
232}
c1d10adb 233
80e60e67
PNA		 234static int
235ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
236 enum ip_conntrack_dir dir, int type)
237{
238 struct nf_conn_counter *acct;
239 u64 pkts, bytes;
240
241 acct = nf_conn_acct_find(ct);
242 if (!acct)
243 return 0;
244
245 if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
246 pkts = atomic64_xchg(&acct[dir].packets, 0);
247 bytes = atomic64_xchg(&acct[dir].bytes, 0);
248 } else {
249 pkts = atomic64_read(&acct[dir].packets);
250 bytes = atomic64_read(&acct[dir].bytes);
251 }
252 return dump_counters(skb, pkts, bytes, dir);
253}
254
a992ca2a
PNA		 255static int
256ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
257{
258 struct nlattr *nest_count;
259 const struct nf_conn_tstamp *tstamp;
260
261 tstamp = nf_conn_tstamp_find(ct);
262 if (!tstamp)
263 return 0;
264
265 nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED);
266 if (!nest_count)
267 goto nla_put_failure;
268
cc1eb431
DM		 269 if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) ||
270 (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
271 cpu_to_be64(tstamp->stop))))
272 goto nla_put_failure;
a992ca2a
PNA		 273 nla_nest_end(skb, nest_count);
274
275 return 0;
276
277nla_put_failure:
278 return -1;
279}
280
c1d10adb
PNA		 281#ifdef CONFIG_NF_CONNTRACK_MARK
282static inline int
283ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
284{
cc1eb431
DM		 285 if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
286 goto nla_put_failure;
c1d10adb
PNA		 287 return 0;
288
df6fb868 289nla_put_failure:
c1d10adb
PNA		 290 return -1;
291}
292#else
293#define ctnetlink_dump_mark(a, b) (0)
294#endif
295
37fccd85
PNA		 296#ifdef CONFIG_NF_CONNTRACK_SECMARK
297static inline int
1cc63249 298ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
37fccd85 299{
1cc63249
EP		 300 struct nlattr *nest_secctx;
301 int len, ret;
302 char *secctx;
303
304 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
305 if (ret)
cba85b53 306 return 0;
1cc63249
EP		 307
308 ret = -1;
309 nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
310 if (!nest_secctx)
311 goto nla_put_failure;
37fccd85 312
cc1eb431
DM		 313 if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
314 goto nla_put_failure;
1cc63249
EP		 315 nla_nest_end(skb, nest_secctx);
316
317 ret = 0;
37fccd85 318nla_put_failure:
1cc63249
EP		 319 security_release_secctx(secctx, len);
320 return ret;
37fccd85
PNA		 321}
322#else
1cc63249 323#define ctnetlink_dump_secctx(a, b) (0)
37fccd85
PNA		 324#endif
325
0f417ce9
PNA		 326#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
327
328static inline int
329ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
330{
331 struct nlattr *nest_parms;
332
333 if (!(ct->status & IPS_EXPECTED))
334 return 0;
335
336 nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED);
337 if (!nest_parms)
338 goto nla_put_failure;
339 if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
340 goto nla_put_failure;
341 nla_nest_end(skb, nest_parms);
342
343 return 0;
344
345nla_put_failure:
346 return -1;
347}
348
13eae15a 349#ifdef CONFIG_NF_NAT_NEEDED
bb5cf80e 350static int
13eae15a
PNA		 351dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type)
352{
13eae15a
PNA		 353 struct nlattr *nest_parms;
354
355 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
356 if (!nest_parms)
357 goto nla_put_failure;
358
cc1eb431
DM		 359 if (nla_put_be32(skb, CTA_NAT_SEQ_CORRECTION_POS,
360 htonl(natseq->correction_pos)) ||
361 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_BEFORE,
362 htonl(natseq->offset_before)) ||
363 nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_AFTER,
364 htonl(natseq->offset_after)))
365 goto nla_put_failure;
13eae15a
PNA		 366
367 nla_nest_end(skb, nest_parms);
368
369 return 0;
370
371nla_put_failure:
372 return -1;
373}
374
375static inline int
376ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
377{
378 struct nf_nat_seq *natseq;
379 struct nf_conn_nat *nat = nfct_nat(ct);
380
381 if (!(ct->status & IPS_SEQ_ADJUST) || !nat)
382 return 0;
383
384 natseq = &nat->seq[IP_CT_DIR_ORIGINAL];
385 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1)
386 return -1;
387
388 natseq = &nat->seq[IP_CT_DIR_REPLY];
389 if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1)
390 return -1;
391
392 return 0;
393}
394#else
395#define ctnetlink_dump_nat_seq_adj(a, b) (0)
396#endif
397
c1d10adb
PNA		 398static inline int
399ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
400{
cc1eb431
DM		 401 if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
402 goto nla_put_failure;
c1d10adb
PNA		 403 return 0;
404
df6fb868 405nla_put_failure:
c1d10adb
PNA		 406 return -1;
407}
408
409static inline int
410ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
411{
cc1eb431
DM		 412 if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
413 goto nla_put_failure;
c1d10adb
PNA		 414 return 0;
415
df6fb868 416nla_put_failure:
c1d10adb
PNA		 417 return -1;
418}
419
c1d10adb 420static int
15e47304 421ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
80e60e67 422 struct nf_conn *ct)
c1d10adb
PNA		 423{
424 struct nlmsghdr *nlh;
425 struct nfgenmsg *nfmsg;
df6fb868 426 struct nlattr *nest_parms;
15e47304 427 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
c1d10adb 428
80e60e67 429 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
15e47304 430 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 431 if (nlh == NULL)
432 goto nlmsg_failure;
c1d10adb 433
96bcf938 434 nfmsg = nlmsg_data(nlh);
5e8fbe2a 435 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 436 nfmsg->version = NFNETLINK_V0;
437 nfmsg->res_id = 0;
438
df6fb868
PM		 439 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
440 if (!nest_parms)
441 goto nla_put_failure;
f2f3e38c 442 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 443 goto nla_put_failure;
444 nla_nest_end(skb, nest_parms);
601e68e1 445
df6fb868
PM		 446 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
447 if (!nest_parms)
448 goto nla_put_failure;
f2f3e38c 449 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 450 goto nla_put_failure;
451 nla_nest_end(skb, nest_parms);
c1d10adb 452
cc1eb431
DM		 453 if (nf_ct_zone(ct) &&
454 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
455 goto nla_put_failure;
ef00f89f 456
c1d10adb
PNA		 457 if (ctnetlink_dump_status(skb, ct) < 0 ||
458 ctnetlink_dump_timeout(skb, ct) < 0 ||
80e60e67
PNA		 459 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 ||
460 ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 461 ctnetlink_dump_timestamp(skb, ct) < 0 ||
c1d10adb
PNA		 462 ctnetlink_dump_protoinfo(skb, ct) < 0 ||
463 ctnetlink_dump_helpinfo(skb, ct) < 0 ||
464 ctnetlink_dump_mark(skb, ct) < 0 ||
1cc63249 465 ctnetlink_dump_secctx(skb, ct) < 0 ||
c1d10adb 466 ctnetlink_dump_id(skb, ct) < 0 ||
13eae15a 467 ctnetlink_dump_use(skb, ct) < 0 ||
0f417ce9 468 ctnetlink_dump_master(skb, ct) < 0 ||
13eae15a 469 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
df6fb868 470 goto nla_put_failure;
c1d10adb 471
96bcf938 472 nlmsg_end(skb, nlh);
c1d10adb
PNA		 473 return skb->len;
474
475nlmsg_failure:
df6fb868 476nla_put_failure:
96bcf938 477 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 478 return -1;
479}
480
03b64f51
PNA		 481static inline size_t
482ctnetlink_proto_size(const struct nf_conn *ct)
2732c4e4
HE		 483{
484 struct nf_conntrack_l3proto *l3proto;
485 struct nf_conntrack_l4proto *l4proto;
03b64f51
PNA		 486 size_t len = 0;
487
488 rcu_read_lock();
489 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
490 len += l3proto->nla_size;
491
492 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
493 len += l4proto->nla_size;
494 rcu_read_unlock();
495
496 return len;
497}
498
d26e6a02
JP		 499static inline size_t
500ctnetlink_counters_size(const struct nf_conn *ct)
501{
502 if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
503 return 0;
504 return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
505 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
506 + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
507 ;
508}
509
cba85b53
PNA		 510static inline int
511ctnetlink_secctx_size(const struct nf_conn *ct)
1cc63249 512{
cba85b53
PNA		 513#ifdef CONFIG_NF_CONNTRACK_SECMARK
514 int len, ret;
1cc63249 515
cba85b53
PNA		 516 ret = security_secid_to_secctx(ct->secmark, NULL, &len);
517 if (ret)
518 return 0;
1cc63249 519
cba85b53
PNA		 520 return nla_total_size(0) /* CTA_SECCTX */
521 + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
522#else
523 return 0;
1cc63249 524#endif
cba85b53 525}
1cc63249 526
a992ca2a
PNA		 527static inline size_t
528ctnetlink_timestamp_size(const struct nf_conn *ct)
529{
530#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
531 if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
532 return 0;
533 return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t));
534#else
535 return 0;
536#endif
537}
538
03b64f51
PNA		 539static inline size_t
540ctnetlink_nlmsg_size(const struct nf_conn *ct)
541{
542 return NLMSG_ALIGN(sizeof(struct nfgenmsg))
543 + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
544 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
545 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
546 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
547 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
548 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
d26e6a02 549 + ctnetlink_counters_size(ct)
a992ca2a 550 + ctnetlink_timestamp_size(ct)
03b64f51
PNA		 551 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
552 + nla_total_size(0) /* CTA_PROTOINFO */
553 + nla_total_size(0) /* CTA_HELP */
554 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
cba85b53 555 + ctnetlink_secctx_size(ct)
d271e8bd 556#ifdef CONFIG_NF_NAT_NEEDED
03b64f51
PNA		 557 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
558 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
d271e8bd
HE		 559#endif
560#ifdef CONFIG_NF_CONNTRACK_MARK
03b64f51 561 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
d271e8bd 562#endif
03b64f51
PNA		 563 + ctnetlink_proto_size(ct)
564 ;
2732c4e4
HE		 565}
566
8e36c4b5 567#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 568static int
569ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
c1d10adb 570{
9592a5c0 571 struct net *net;
c1d10adb
PNA		 572 struct nlmsghdr *nlh;
573 struct nfgenmsg *nfmsg;
df6fb868 574 struct nlattr *nest_parms;
19abb7b0 575 struct nf_conn *ct = item->ct;
c1d10adb
PNA		 576 struct sk_buff *skb;
577 unsigned int type;
c1d10adb 578 unsigned int flags = 0, group;
dd7669a9 579 int err;
c1d10adb
PNA		 580
581 /* ignore our fake conntrack entry */
5bfddbd4 582 if (nf_ct_is_untracked(ct))
e34d5c1a 583 return 0;
c1d10adb 584
a0891aa6 585 if (events & (1 << IPCT_DESTROY)) {
c1d10adb
PNA		 586 type = IPCTNL_MSG_CT_DELETE;
587 group = NFNLGRP_CONNTRACK_DESTROY;
a0891aa6 588 } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
c1d10adb
PNA		 589 type = IPCTNL_MSG_CT_NEW;
590 flags = NLM_F_CREATE|NLM_F_EXCL;
c1d10adb 591 group = NFNLGRP_CONNTRACK_NEW;
17e6e4ea 592 } else if (events) {
c1d10adb
PNA		 593 type = IPCTNL_MSG_CT_NEW;
594 group = NFNLGRP_CONNTRACK_UPDATE;
595 } else
e34d5c1a 596 return 0;
a2427692 597
9592a5c0
AD		 598 net = nf_ct_net(ct);
599 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 600 return 0;
a2427692 601
03b64f51
PNA		 602 skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
603 if (skb == NULL)
150ace0d 604 goto errout;
c1d10adb 605
c1d10adb 606 type |= NFNL_SUBSYS_CTNETLINK << 8;
15e47304 607 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 608 if (nlh == NULL)
609 goto nlmsg_failure;
c1d10adb 610
96bcf938 611 nfmsg = nlmsg_data(nlh);
5e8fbe2a 612 nfmsg->nfgen_family = nf_ct_l3num(ct);
c1d10adb
PNA		 613 nfmsg->version = NFNETLINK_V0;
614 nfmsg->res_id = 0;
615
528a3a6f 616 rcu_read_lock();
df6fb868
PM		 617 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
618 if (!nest_parms)
619 goto nla_put_failure;
f2f3e38c 620 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
df6fb868
PM		 621 goto nla_put_failure;
622 nla_nest_end(skb, nest_parms);
601e68e1 623
df6fb868
PM		 624 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
625 if (!nest_parms)
626 goto nla_put_failure;
f2f3e38c 627 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
df6fb868
PM		 628 goto nla_put_failure;
629 nla_nest_end(skb, nest_parms);
c1d10adb 630
cc1eb431
DM		 631 if (nf_ct_zone(ct) &&
632 nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
633 goto nla_put_failure;
ef00f89f 634
1eedf699
EL		 635 if (ctnetlink_dump_id(skb, ct) < 0)
636 goto nla_put_failure;
637
e57dce60
FH		 638 if (ctnetlink_dump_status(skb, ct) < 0)
639 goto nla_put_failure;
640
a0891aa6 641 if (events & (1 << IPCT_DESTROY)) {
80e60e67
PNA		 642 if (ctnetlink_dump_counters(skb, ct,
643 IP_CT_DIR_ORIGINAL, type) < 0 ||
644 ctnetlink_dump_counters(skb, ct,
645 IP_CT_DIR_REPLY, type) < 0 ||
a992ca2a 646 ctnetlink_dump_timestamp(skb, ct) < 0)
df6fb868 647 goto nla_put_failure;
7b621c1e 648 } else {
7b621c1e 649 if (ctnetlink_dump_timeout(skb, ct) < 0)
df6fb868 650 goto nla_put_failure;
7b621c1e 651
a0891aa6 652 if (events & (1 << IPCT_PROTOINFO)
7b621c1e 653 && ctnetlink_dump_protoinfo(skb, ct) < 0)
df6fb868 654 goto nla_put_failure;
7b621c1e 655
a0891aa6 656 if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
7b621c1e 657 && ctnetlink_dump_helpinfo(skb, ct) < 0)
df6fb868 658 goto nla_put_failure;
7b621c1e 659
ff660c80 660#ifdef CONFIG_NF_CONNTRACK_SECMARK
a0891aa6 661 if ((events & (1 << IPCT_SECMARK) || ct->secmark)
1cc63249 662 && ctnetlink_dump_secctx(skb, ct) < 0)
37fccd85 663 goto nla_put_failure;
ff660c80 664#endif
7b621c1e 665
a0891aa6 666 if (events & (1 << IPCT_RELATED) &&
0f417ce9
PNA		 667 ctnetlink_dump_master(skb, ct) < 0)
668 goto nla_put_failure;
669
a0891aa6 670 if (events & (1 << IPCT_NATSEQADJ) &&
13eae15a
PNA		 671 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
672 goto nla_put_failure;
7b621c1e 673 }
b9a37e0c 674
a83099a6 675#ifdef CONFIG_NF_CONNTRACK_MARK
a0891aa6 676 if ((events & (1 << IPCT_MARK) || ct->mark)
a83099a6
EL		 677 && ctnetlink_dump_mark(skb, ct) < 0)
678 goto nla_put_failure;
679#endif
528a3a6f 680 rcu_read_unlock();
a83099a6 681
96bcf938 682 nlmsg_end(skb, nlh);
15e47304 683 err = nfnetlink_send(skb, net, item->portid, group, item->report,
cd8c20b6 684 GFP_ATOMIC);
dd7669a9
PNA		 685 if (err == -ENOBUFS || err == -EAGAIN)
686 return -ENOBUFS;
687
e34d5c1a 688 return 0;
c1d10adb 689
df6fb868 690nla_put_failure:
528a3a6f 691 rcu_read_unlock();
96bcf938 692 nlmsg_cancel(skb, nlh);
528a3a6f 693nlmsg_failure:
c1d10adb 694 kfree_skb(skb);
150ace0d 695errout:
37b7ef72
PNA		 696 if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
697 return -ENOBUFS;
698
e34d5c1a 699 return 0;
c1d10adb
PNA		 700}
701#endif /* CONFIG_NF_CONNTRACK_EVENTS */
702
703static int ctnetlink_done(struct netlink_callback *cb)
704{
89f2e218
PM		 705 if (cb->args[1])
706 nf_ct_put((struct nf_conn *)cb->args[1]);
0f298a28
PNA		 707 if (cb->data)
708 kfree(cb->data);
c1d10adb
PNA		 709 return 0;
710}
711
0f298a28
PNA		 712struct ctnetlink_dump_filter {
713 struct {
714 u_int32_t val;
715 u_int32_t mask;
716 } mark;
717};
718
c1d10adb
PNA		 719static int
720ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
721{
9592a5c0 722 struct net *net = sock_net(skb->sk);
89f2e218 723 struct nf_conn *ct, *last;
c1d10adb 724 struct nf_conntrack_tuple_hash *h;
ea781f19 725 struct hlist_nulls_node *n;
96bcf938 726 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
87711cb8 727 u_int8_t l3proto = nfmsg->nfgen_family;
3b988ece 728 int res;
0f298a28
PNA		 729#ifdef CONFIG_NF_CONNTRACK_MARK
730 const struct ctnetlink_dump_filter *filter = cb->data;
731#endif
3b988ece 732
13ee6ac5 733 spin_lock_bh(&nf_conntrack_lock);
d205dc40 734 last = (struct nf_conn *)cb->args[1];
9ab99d5a 735 for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) {
89f2e218 736restart:
13ee6ac5 737 hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]],
ea781f19 738 hnnode) {
5b1158e9 739 if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
c1d10adb
PNA		 740 continue;
741 ct = nf_ct_tuplehash_to_ctrack(h);
87711cb8
PNA		 742 /* Dump entries of a given L3 protocol number.
743 * If it is not specified, ie. l3proto == 0,
744 * then dump everything. */
5e8fbe2a 745 if (l3proto && nf_ct_l3num(ct) != l3proto)
13ee6ac5 746 continue;
d205dc40
PM		 747 if (cb->args[1]) {
748 if (ct != last)
13ee6ac5 749 continue;
d205dc40 750 cb->args[1] = 0;
89f2e218 751 }
0f298a28
PNA		 752#ifdef CONFIG_NF_CONNTRACK_MARK
753 if (filter && !((ct->mark & filter->mark.mask) ==
754 filter->mark.val)) {
755 continue;
756 }
757#endif
3b988ece
HS		 758 rcu_read_lock();
759 res =
15e47304 760 ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
3b988ece
HS		 761 cb->nlh->nlmsg_seq,
762 NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
763 ct);
764 rcu_read_unlock();
765 if (res < 0) {
c71caf41 766 nf_conntrack_get(&ct->ct_general);
89f2e218 767 cb->args[1] = (unsigned long)ct;
c1d10adb 768 goto out;
89f2e218
PM		 769 }
770 }
d205dc40 771 if (cb->args[1]) {
89f2e218
PM		 772 cb->args[1] = 0;
773 goto restart;
c1d10adb
PNA		 774 }
775 }
89f2e218 776out:
13ee6ac5 777 spin_unlock_bh(&nf_conntrack_lock);
d205dc40
PM		 778 if (last)
779 nf_ct_put(last);
c1d10adb 780
c1d10adb
PNA		 781 return skb->len;
782}
783
c1d10adb 784static inline int
df6fb868 785ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
c1d10adb 786{
df6fb868 787 struct nlattr *tb[CTA_IP_MAX+1];
c1d10adb
PNA		 788 struct nf_conntrack_l3proto *l3proto;
789 int ret = 0;
790
df6fb868 791 nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
c1d10adb 792
cd91566e
FW		 793 rcu_read_lock();
794 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
c1d10adb 795
f73e924c
PM		 796 if (likely(l3proto->nlattr_to_tuple)) {
797 ret = nla_validate_nested(attr, CTA_IP_MAX,
798 l3proto->nla_policy);
799 if (ret == 0)
800 ret = l3proto->nlattr_to_tuple(tb, tuple);
801 }
c1d10adb 802
cd91566e 803 rcu_read_unlock();
c1d10adb 804
c1d10adb
PNA		 805 return ret;
806}
807
f73e924c
PM		 808static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = {
809 [CTA_PROTO_NUM] = { .type = NLA_U8 },
c1d10adb
PNA		 810};
811
812static inline int
df6fb868 813ctnetlink_parse_tuple_proto(struct nlattr *attr,
c1d10adb
PNA		 814 struct nf_conntrack_tuple *tuple)
815{
df6fb868 816 struct nlattr *tb[CTA_PROTO_MAX+1];
605dcad6 817 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 818 int ret = 0;
819
f73e924c
PM		 820 ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy);
821 if (ret < 0)
822 return ret;
c1d10adb 823
df6fb868 824 if (!tb[CTA_PROTO_NUM])
c1d10adb 825 return -EINVAL;
77236b6e 826 tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
c1d10adb 827
cd91566e
FW		 828 rcu_read_lock();
829 l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
c1d10adb 830
f73e924c
PM		 831 if (likely(l4proto->nlattr_to_tuple)) {
832 ret = nla_validate_nested(attr, CTA_PROTO_MAX,
833 l4proto->nla_policy);
834 if (ret == 0)
835 ret = l4proto->nlattr_to_tuple(tb, tuple);
836 }
c1d10adb 837
cd91566e 838 rcu_read_unlock();
601e68e1 839
c1d10adb
PNA		 840 return ret;
841}
842
d0b0268f
PM		 843static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = {
844 [CTA_TUPLE_IP] = { .type = NLA_NESTED },
845 [CTA_TUPLE_PROTO] = { .type = NLA_NESTED },
846};
847
bb5cf80e 848static int
39938324
PM		 849ctnetlink_parse_tuple(const struct nlattr * const cda[],
850 struct nf_conntrack_tuple *tuple,
a00f1f36 851 enum ctattr_type type, u_int8_t l3num)
c1d10adb 852{
df6fb868 853 struct nlattr *tb[CTA_TUPLE_MAX+1];
c1d10adb
PNA		 854 int err;
855
c1d10adb
PNA		 856 memset(tuple, 0, sizeof(*tuple));
857
d0b0268f 858 nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy);
c1d10adb 859
df6fb868 860 if (!tb[CTA_TUPLE_IP])
c1d10adb
PNA		 861 return -EINVAL;
862
863 tuple->src.l3num = l3num;
864
df6fb868 865 err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple);
c1d10adb
PNA		 866 if (err < 0)
867 return err;
868
df6fb868 869 if (!tb[CTA_TUPLE_PROTO])
c1d10adb
PNA		 870 return -EINVAL;
871
df6fb868 872 err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple);
c1d10adb
PNA		 873 if (err < 0)
874 return err;
875
876 /* orig and expect tuples get DIR_ORIGINAL */
877 if (type == CTA_TUPLE_REPLY)
878 tuple->dst.dir = IP_CT_DIR_REPLY;
879 else
880 tuple->dst.dir = IP_CT_DIR_ORIGINAL;
881
c1d10adb
PNA		 882 return 0;
883}
884
ef00f89f
PM		 885static int
886ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone)
887{
888 if (attr)
889#ifdef CONFIG_NF_CONNTRACK_ZONES
890 *zone = ntohs(nla_get_be16(attr));
891#else
892 return -EOPNOTSUPP;
893#endif
894 else
895 *zone = 0;
896
897 return 0;
898}
899
d0b0268f
PM		 900static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = {
901 [CTA_HELP_NAME] = { .type = NLA_NUL_STRING },
902};
903
c1d10adb 904static inline int
ae243bee
PNA		 905ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
906 struct nlattr **helpinfo)
c1d10adb 907{
df6fb868 908 struct nlattr *tb[CTA_HELP_MAX+1];
c1d10adb 909
d0b0268f 910 nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy);
c1d10adb 911
df6fb868 912 if (!tb[CTA_HELP_NAME])
c1d10adb
PNA		 913 return -EINVAL;
914
df6fb868 915 *helper_name = nla_data(tb[CTA_HELP_NAME]);
c1d10adb 916
ae243bee
PNA		 917 if (tb[CTA_HELP_INFO])
918 *helpinfo = tb[CTA_HELP_INFO];
919
c1d10adb
PNA		 920 return 0;
921}
922
f73e924c 923static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
d0b0268f
PM		 924 [CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
925 [CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
f73e924c 926 [CTA_STATUS] = { .type = NLA_U32 },
d0b0268f
PM		 927 [CTA_PROTOINFO] = { .type = NLA_NESTED },
928 [CTA_HELP] = { .type = NLA_NESTED },
929 [CTA_NAT_SRC] = { .type = NLA_NESTED },
f73e924c
PM		 930 [CTA_TIMEOUT] = { .type = NLA_U32 },
931 [CTA_MARK] = { .type = NLA_U32 },
f73e924c 932 [CTA_ID] = { .type = NLA_U32 },
d0b0268f
PM		 933 [CTA_NAT_DST] = { .type = NLA_NESTED },
934 [CTA_TUPLE_MASTER] = { .type = NLA_NESTED },
ef00f89f 935 [CTA_ZONE] = { .type = NLA_U16 },
0f298a28 936 [CTA_MARK_MASK] = { .type = NLA_U32 },
c1d10adb
PNA		 937};
938
939static int
601e68e1 940ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 941 const struct nlmsghdr *nlh,
942 const struct nlattr * const cda[])
c1d10adb 943{
9592a5c0 944 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 945 struct nf_conntrack_tuple_hash *h;
946 struct nf_conntrack_tuple tuple;
947 struct nf_conn *ct;
96bcf938 948 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 949 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 950 u16 zone;
951 int err;
952
953 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
954 if (err < 0)
955 return err;
c1d10adb 956
df6fb868 957 if (cda[CTA_TUPLE_ORIG])
c1d10adb 958 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 959 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 960 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
961 else {
962 /* Flush the whole table */
9592a5c0 963 nf_conntrack_flush_report(net,
15e47304 964 NETLINK_CB(skb).portid,
274d383b 965 nlmsg_report(nlh));
c1d10adb
PNA		 966 return 0;
967 }
968
969 if (err < 0)
970 return err;
971
ef00f89f 972 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 973 if (!h)
c1d10adb 974 return -ENOENT;
c1d10adb
PNA		 975
976 ct = nf_ct_tuplehash_to_ctrack(h);
601e68e1 977
df6fb868 978 if (cda[CTA_ID]) {
77236b6e 979 u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
7f85f914 980 if (id != (u32)(unsigned long)ct) {
c1d10adb
PNA		 981 nf_ct_put(ct);
982 return -ENOENT;
983 }
601e68e1 984 }
c1d10adb 985
a16a1647
PNA		 986 if (del_timer(&ct->timeout)) {
987 if (nf_conntrack_event_report(IPCT_DESTROY, ct,
15e47304 988 NETLINK_CB(skb).portid,
a16a1647
PNA		 989 nlmsg_report(nlh)) < 0) {
990 nf_ct_delete_from_lists(ct);
991 /* we failed to report the event, try later */
04dac011 992 nf_ct_dying_timeout(ct);
a16a1647
PNA		 993 nf_ct_put(ct);
994 return 0;
995 }
996 /* death_by_timeout would report the event again */
997 set_bit(IPS_DYING_BIT, &ct->status);
dd7669a9 998 nf_ct_delete_from_lists(ct);
dd7669a9 999 nf_ct_put(ct);
dd7669a9 1000 }
c1d10adb 1001 nf_ct_put(ct);
c1d10adb
PNA		 1002
1003 return 0;
1004}
1005
1006static int
601e68e1 1007ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1008 const struct nlmsghdr *nlh,
1009 const struct nlattr * const cda[])
c1d10adb 1010{
9592a5c0 1011 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1012 struct nf_conntrack_tuple_hash *h;
1013 struct nf_conntrack_tuple tuple;
1014 struct nf_conn *ct;
1015 struct sk_buff *skb2 = NULL;
96bcf938 1016 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 1017 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1018 u16 zone;
1019 int err;
c1d10adb 1020
80d326fa
PNA		 1021 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1022 struct netlink_dump_control c = {
1023 .dump = ctnetlink_dump_table,
1024 .done = ctnetlink_done,
1025 };
0f298a28
PNA		 1026#ifdef CONFIG_NF_CONNTRACK_MARK
1027 if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) {
1028 struct ctnetlink_dump_filter *filter;
1029
1030 filter = kzalloc(sizeof(struct ctnetlink_dump_filter),
1031 GFP_ATOMIC);
1032 if (filter == NULL)
1033 return -ENOMEM;
1034
1035 filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
1036 filter->mark.mask =
1037 ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
1038 c.data = filter;
1039 }
1040#endif
80d326fa
PNA		 1041 return netlink_dump_start(ctnl, skb, nlh, &c);
1042 }
c1d10adb 1043
ef00f89f
PM		 1044 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1045 if (err < 0)
1046 return err;
1047
df6fb868 1048 if (cda[CTA_TUPLE_ORIG])
c1d10adb 1049 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3);
df6fb868 1050 else if (cda[CTA_TUPLE_REPLY])
c1d10adb
PNA		 1051 err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
1052 else
1053 return -EINVAL;
1054
1055 if (err < 0)
1056 return err;
1057
ef00f89f 1058 h = nf_conntrack_find_get(net, zone, &tuple);
9ea8cfd6 1059 if (!h)
c1d10adb 1060 return -ENOENT;
9ea8cfd6 1061
c1d10adb
PNA		 1062 ct = nf_ct_tuplehash_to_ctrack(h);
1063
1064 err = -ENOMEM;
96bcf938
PNA		 1065 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1066 if (skb2 == NULL) {
c1d10adb
PNA		 1067 nf_ct_put(ct);
1068 return -ENOMEM;
1069 }
c1d10adb 1070
528a3a6f 1071 rcu_read_lock();
15e47304 1072 err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
80e60e67 1073 NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
528a3a6f 1074 rcu_read_unlock();
c1d10adb
PNA		 1075 nf_ct_put(ct);
1076 if (err <= 0)
1077 goto free;
1078
15e47304 1079 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
c1d10adb
PNA		 1080 if (err < 0)
1081 goto out;
1082
c1d10adb
PNA		 1083 return 0;
1084
1085free:
1086 kfree_skb(skb2);
1087out:
f31e8d49
PNA		 1088 /* this avoids a loop in nfnetlink. */
1089 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 1090}
1091
67671841 1092#ifdef CONFIG_NF_NAT_NEEDED
e6a7d3c0
PNA		 1093static int
1094ctnetlink_parse_nat_setup(struct nf_conn *ct,
1095 enum nf_nat_manip_type manip,
39938324 1096 const struct nlattr *attr)
e6a7d3c0
PNA		 1097{
1098 typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
c7232c99 1099 int err;
e6a7d3c0
PNA		 1100
1101 parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
1102 if (!parse_nat_setup) {
95a5afca 1103#ifdef CONFIG_MODULES
e6a7d3c0
PNA		 1104 rcu_read_unlock();
1105 nfnl_unlock();
c7232c99 1106 if (request_module("nf-nat") < 0) {
e6a7d3c0
PNA		 1107 nfnl_lock();
1108 rcu_read_lock();
1109 return -EOPNOTSUPP;
1110 }
1111 nfnl_lock();
1112 rcu_read_lock();
1113 if (nfnetlink_parse_nat_setup_hook)
1114 return -EAGAIN;
1115#endif
1116 return -EOPNOTSUPP;
1117 }
1118
c7232c99
PM		 1119 err = parse_nat_setup(ct, manip, attr);
1120 if (err == -EAGAIN) {
1121#ifdef CONFIG_MODULES
1122 rcu_read_unlock();
c7232c99
PM		 1123 nfnl_unlock();
1124 if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
1125 nfnl_lock();
c7232c99
PM		 1126 rcu_read_lock();
1127 return -EOPNOTSUPP;
1128 }
1129 nfnl_lock();
c7232c99
PM		 1130 rcu_read_lock();
1131#else
1132 err = -EOPNOTSUPP;
1133#endif
1134 }
1135 return err;
e6a7d3c0 1136}
67671841 1137#endif
e6a7d3c0 1138
bb5cf80e 1139static int
39938324 1140ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1141{
1142 unsigned long d;
77236b6e 1143 unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
c1d10adb
PNA		 1144 d = ct->status ^ status;
1145
1146 if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
1147 /* unchangeable */
0adf9d67 1148 return -EBUSY;
601e68e1 1149
c1d10adb
PNA		 1150 if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
1151 /* SEEN_REPLY bit can only be set */
0adf9d67 1152 return -EBUSY;
601e68e1 1153
c1d10adb
PNA		 1154 if (d & IPS_ASSURED && !(status & IPS_ASSURED))
1155 /* ASSURED bit can only be set */
0adf9d67 1156 return -EBUSY;
c1d10adb 1157
c1d10adb
PNA		 1158 /* Be careful here, modifying NAT bits can screw up things,
1159 * so don't let users modify them directly if they don't pass
5b1158e9 1160 * nf_nat_range. */
c1d10adb
PNA		 1161 ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
1162 return 0;
1163}
1164
e6a7d3c0 1165static int
39938324 1166ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[])
e6a7d3c0
PNA		 1167{
1168#ifdef CONFIG_NF_NAT_NEEDED
1169 int ret;
1170
1171 if (cda[CTA_NAT_DST]) {
1172 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1173 NF_NAT_MANIP_DST,
e6a7d3c0
PNA		 1174 cda[CTA_NAT_DST]);
1175 if (ret < 0)
1176 return ret;
1177 }
1178 if (cda[CTA_NAT_SRC]) {
1179 ret = ctnetlink_parse_nat_setup(ct,
cbc9f2f4 1180 NF_NAT_MANIP_SRC,
e6a7d3c0
PNA		 1181 cda[CTA_NAT_SRC]);
1182 if (ret < 0)
1183 return ret;
1184 }
1185 return 0;
1186#else
1187 return -EOPNOTSUPP;
1188#endif
1189}
c1d10adb
PNA		 1190
1191static inline int
39938324 1192ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb
PNA		 1193{
1194 struct nf_conntrack_helper *helper;
dc808fe2 1195 struct nf_conn_help *help = nfct_help(ct);
29fe1b48 1196 char *helpname = NULL;
ae243bee 1197 struct nlattr *helpinfo = NULL;
c1d10adb
PNA		 1198 int err;
1199
c1d10adb
PNA		 1200 /* don't change helper of sibling connections */
1201 if (ct->master)
0adf9d67 1202 return -EBUSY;
c1d10adb 1203
ae243bee 1204 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
c1d10adb
PNA		 1205 if (err < 0)
1206 return err;
1207
df293bbb
YK		 1208 if (!strcmp(helpname, "")) {
1209 if (help && help->helper) {
c1d10adb
PNA		 1210 /* we had a helper before ... */
1211 nf_ct_remove_expectations(ct);
a9b3cd7f 1212 RCU_INIT_POINTER(help->helper, NULL);
c1d10adb 1213 }
df293bbb
YK		 1214
1215 return 0;
c1d10adb 1216 }
601e68e1 1217
794e6871
PM		 1218 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1219 nf_ct_protonum(ct));
226c0c0e
PNA		 1220 if (helper == NULL) {
1221#ifdef CONFIG_MODULES
1222 spin_unlock_bh(&nf_conntrack_lock);
1223
1224 if (request_module("nfct-helper-%s", helpname) < 0) {
1225 spin_lock_bh(&nf_conntrack_lock);
1226 return -EOPNOTSUPP;
1227 }
1228
1229 spin_lock_bh(&nf_conntrack_lock);
794e6871
PM		 1230 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1231 nf_ct_protonum(ct));
226c0c0e
PNA		 1232 if (helper)
1233 return -EAGAIN;
1234#endif
0adf9d67 1235 return -EOPNOTSUPP;
226c0c0e 1236 }
df293bbb 1237
ceceae1b 1238 if (help) {
ae243bee
PNA		 1239 if (help->helper == helper) {
1240 /* update private helper data if allowed. */
7be54ca4 1241 if (helper->from_nlattr)
ae243bee 1242 helper->from_nlattr(helpinfo, ct);
ceceae1b 1243 return 0;
fd7462de 1244 } else
ceceae1b 1245 return -EBUSY;
ceceae1b 1246 }
df293bbb 1247
fd7462de
PNA		 1248 /* we cannot set a helper for an existing conntrack */
1249 return -EOPNOTSUPP;
c1d10adb
PNA		 1250}
1251
1252static inline int
39938324 1253ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1254{
77236b6e 1255 u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
601e68e1 1256
c1d10adb
PNA		 1257 if (!del_timer(&ct->timeout))
1258 return -ETIME;
1259
1260 ct->timeout.expires = jiffies + timeout * HZ;
1261 add_timer(&ct->timeout);
1262
1263 return 0;
1264}
1265
d0b0268f
PM		 1266static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = {
1267 [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED },
1268 [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED },
1269 [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED },
1270};
1271
c1d10adb 1272static inline int
39938324 1273ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[])
c1d10adb 1274{
39938324
PM		 1275 const struct nlattr *attr = cda[CTA_PROTOINFO];
1276 struct nlattr *tb[CTA_PROTOINFO_MAX+1];
605dcad6 1277 struct nf_conntrack_l4proto *l4proto;
c1d10adb
PNA		 1278 int err = 0;
1279
d0b0268f 1280 nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy);
c1d10adb 1281
cd91566e
FW		 1282 rcu_read_lock();
1283 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
fdf70832
PM		 1284 if (l4proto->from_nlattr)
1285 err = l4proto->from_nlattr(tb, ct);
cd91566e 1286 rcu_read_unlock();
c1d10adb
PNA		 1287
1288 return err;
1289}
1290
13eae15a 1291#ifdef CONFIG_NF_NAT_NEEDED
d0b0268f
PM		 1292static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = {
1293 [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 },
1294 [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 },
1295 [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 },
1296};
1297
13eae15a 1298static inline int
39938324 1299change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr)
13eae15a
PNA		 1300{
1301 struct nlattr *cda[CTA_NAT_SEQ_MAX+1];
1302
d0b0268f 1303 nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy);
13eae15a
PNA		 1304
1305 if (!cda[CTA_NAT_SEQ_CORRECTION_POS])
1306 return -EINVAL;
1307
1308 natseq->correction_pos =
77236b6e 1309 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS]));
13eae15a
PNA		 1310
1311 if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE])
1312 return -EINVAL;
1313
1314 natseq->offset_before =
77236b6e 1315 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE]));
13eae15a
PNA		 1316
1317 if (!cda[CTA_NAT_SEQ_OFFSET_AFTER])
1318 return -EINVAL;
1319
1320 natseq->offset_after =
77236b6e 1321 ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER]));
13eae15a
PNA		 1322
1323 return 0;
1324}
1325
1326static int
39938324
PM		 1327ctnetlink_change_nat_seq_adj(struct nf_conn *ct,
1328 const struct nlattr * const cda[])
13eae15a
PNA		 1329{
1330 int ret = 0;
1331 struct nf_conn_nat *nat = nfct_nat(ct);
1332
1333 if (!nat)
1334 return 0;
1335
1336 if (cda[CTA_NAT_SEQ_ADJ_ORIG]) {
1337 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL],
1338 cda[CTA_NAT_SEQ_ADJ_ORIG]);
1339 if (ret < 0)
1340 return ret;
1341
1342 ct->status |= IPS_SEQ_ADJUST;
1343 }
1344
1345 if (cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1346 ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY],
1347 cda[CTA_NAT_SEQ_ADJ_REPLY]);
1348 if (ret < 0)
1349 return ret;
1350
1351 ct->status |= IPS_SEQ_ADJUST;
1352 }
1353
1354 return 0;
1355}
1356#endif
1357
c1d10adb 1358static int
39938324
PM		 1359ctnetlink_change_conntrack(struct nf_conn *ct,
1360 const struct nlattr * const cda[])
c1d10adb
PNA		 1361{
1362 int err;
1363
e098360f
PNA		 1364 /* only allow NAT changes and master assignation for new conntracks */
1365 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
1366 return -EOPNOTSUPP;
1367
df6fb868 1368 if (cda[CTA_HELP]) {
c1d10adb
PNA		 1369 err = ctnetlink_change_helper(ct, cda);
1370 if (err < 0)
1371 return err;
1372 }
1373
df6fb868 1374 if (cda[CTA_TIMEOUT]) {
c1d10adb
PNA		 1375 err = ctnetlink_change_timeout(ct, cda);
1376 if (err < 0)
1377 return err;
1378 }
1379
df6fb868 1380 if (cda[CTA_STATUS]) {
c1d10adb
PNA		 1381 err = ctnetlink_change_status(ct, cda);
1382 if (err < 0)
1383 return err;
1384 }
1385
df6fb868 1386 if (cda[CTA_PROTOINFO]) {
c1d10adb
PNA		 1387 err = ctnetlink_change_protoinfo(ct, cda);
1388 if (err < 0)
1389 return err;
1390 }
1391
bcd1e830 1392#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1393 if (cda[CTA_MARK])
77236b6e 1394 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1395#endif
1396
13eae15a
PNA		 1397#ifdef CONFIG_NF_NAT_NEEDED
1398 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1399 err = ctnetlink_change_nat_seq_adj(ct, cda);
1400 if (err < 0)
1401 return err;
1402 }
1403#endif
1404
c1d10adb
PNA		 1405 return 0;
1406}
1407
f0a3c086 1408static struct nf_conn *
ef00f89f 1409ctnetlink_create_conntrack(struct net *net, u16 zone,
9592a5c0 1410 const struct nlattr * const cda[],
c1d10adb 1411 struct nf_conntrack_tuple *otuple,
5faa1f4c 1412 struct nf_conntrack_tuple *rtuple,
7ec47496 1413 u8 u3)
c1d10adb
PNA		 1414{
1415 struct nf_conn *ct;
1416 int err = -EINVAL;
ceceae1b 1417 struct nf_conntrack_helper *helper;
315c34da 1418 struct nf_conn_tstamp *tstamp;
c1d10adb 1419
ef00f89f 1420 ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
cd7fcbf1 1421 if (IS_ERR(ct))
f0a3c086 1422 return ERR_PTR(-ENOMEM);
c1d10adb 1423
df6fb868 1424 if (!cda[CTA_TIMEOUT])
0f5b3e85 1425 goto err1;
77236b6e 1426 ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
c1d10adb
PNA		 1427
1428 ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
c1d10adb 1429
1575e7ea 1430 rcu_read_lock();
226c0c0e 1431 if (cda[CTA_HELP]) {
29fe1b48 1432 char *helpname = NULL;
ae243bee
PNA		 1433 struct nlattr *helpinfo = NULL;
1434
1435 err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
0f5b3e85
PM		 1436 if (err < 0)
1437 goto err2;
226c0c0e 1438
794e6871
PM		 1439 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1440 nf_ct_protonum(ct));
226c0c0e
PNA		 1441 if (helper == NULL) {
1442 rcu_read_unlock();
1443#ifdef CONFIG_MODULES
1444 if (request_module("nfct-helper-%s", helpname) < 0) {
1445 err = -EOPNOTSUPP;
0f5b3e85 1446 goto err1;
226c0c0e
PNA		 1447 }
1448
1449 rcu_read_lock();
794e6871
PM		 1450 helper = __nf_conntrack_helper_find(helpname,
1451 nf_ct_l3num(ct),
1452 nf_ct_protonum(ct));
226c0c0e 1453 if (helper) {
226c0c0e 1454 err = -EAGAIN;
0f5b3e85 1455 goto err2;
226c0c0e
PNA		 1456 }
1457 rcu_read_unlock();
1458#endif
1459 err = -EOPNOTSUPP;
0f5b3e85 1460 goto err1;
226c0c0e
PNA		 1461 } else {
1462 struct nf_conn_help *help;
1463
1afc5679 1464 help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
226c0c0e 1465 if (help == NULL) {
226c0c0e 1466 err = -ENOMEM;
0f5b3e85 1467 goto err2;
226c0c0e 1468 }
ae243bee 1469 /* set private helper data if allowed. */
7be54ca4 1470 if (helper->from_nlattr)
ae243bee 1471 helper->from_nlattr(helpinfo, ct);
226c0c0e
PNA		 1472
1473 /* not in hash table yet so not strictly necessary */
a9b3cd7f 1474 RCU_INIT_POINTER(help->helper, helper);
226c0c0e
PNA		 1475 }
1476 } else {
1477 /* try an implicit helper assignation */
b2a15a60 1478 err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
0f5b3e85
PM		 1479 if (err < 0)
1480 goto err2;
1575e7ea
PNA		 1481 }
1482
a88e22ad
PNA		 1483 if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
1484 err = ctnetlink_change_nat(ct, cda);
0f5b3e85
PM		 1485 if (err < 0)
1486 goto err2;
e6a7d3c0
PNA		 1487 }
1488
a88e22ad 1489 nf_ct_acct_ext_add(ct, GFP_ATOMIC);
a992ca2a 1490 nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
a88e22ad
PNA		 1491 nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
1492 /* we must add conntrack extensions before confirmation. */
1493 ct->status |= IPS_CONFIRMED;
1494
1495 if (cda[CTA_STATUS]) {
1496 err = ctnetlink_change_status(ct, cda);
0f5b3e85
PM		 1497 if (err < 0)
1498 goto err2;
bbb3357d 1499 }
c1d10adb 1500
c969aa7d
PNA		 1501#ifdef CONFIG_NF_NAT_NEEDED
1502 if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
1503 err = ctnetlink_change_nat_seq_adj(ct, cda);
0f5b3e85
PM		 1504 if (err < 0)
1505 goto err2;
c969aa7d
PNA		 1506 }
1507#endif
1508
e5fc9e7a 1509 memset(&ct->proto, 0, sizeof(ct->proto));
df6fb868 1510 if (cda[CTA_PROTOINFO]) {
c1d10adb 1511 err = ctnetlink_change_protoinfo(ct, cda);
0f5b3e85
PM		 1512 if (err < 0)
1513 goto err2;
c1d10adb
PNA		 1514 }
1515
bcd1e830 1516#if defined(CONFIG_NF_CONNTRACK_MARK)
df6fb868 1517 if (cda[CTA_MARK])
77236b6e 1518 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
c1d10adb
PNA		 1519#endif
1520
5faa1f4c 1521 /* setup master conntrack: this is a confirmed expectation */
7ec47496
PNA		 1522 if (cda[CTA_TUPLE_MASTER]) {
1523 struct nf_conntrack_tuple master;
1524 struct nf_conntrack_tuple_hash *master_h;
1525 struct nf_conn *master_ct;
1526
1527 err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
1528 if (err < 0)
0f5b3e85 1529 goto err2;
7ec47496 1530
ef00f89f 1531 master_h = nf_conntrack_find_get(net, zone, &master);
7ec47496
PNA		 1532 if (master_h == NULL) {
1533 err = -ENOENT;
0f5b3e85 1534 goto err2;
7ec47496
PNA		 1535 }
1536 master_ct = nf_ct_tuplehash_to_ctrack(master_h);
f2a89004 1537 __set_bit(IPS_EXPECTED_BIT, &ct->status);
5faa1f4c 1538 ct->master = master_ct;
f2a89004 1539 }
315c34da
PNA		 1540 tstamp = nf_conn_tstamp_find(ct);
1541 if (tstamp)
1542 tstamp->start = ktime_to_ns(ktime_get_real());
5faa1f4c 1543
7d367e06
JK		 1544 err = nf_conntrack_hash_check_insert(ct);
1545 if (err < 0)
1546 goto err2;
1547
58a3c9bb 1548 rcu_read_unlock();
dafc741c 1549
f0a3c086 1550 return ct;
c1d10adb 1551
0f5b3e85
PM		 1552err2:
1553 rcu_read_unlock();
1554err1:
c1d10adb 1555 nf_conntrack_free(ct);
f0a3c086 1556 return ERR_PTR(err);
c1d10adb
PNA		 1557}
1558
601e68e1
YH		 1559static int
1560ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 1561 const struct nlmsghdr *nlh,
1562 const struct nlattr * const cda[])
c1d10adb 1563{
9592a5c0 1564 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 1565 struct nf_conntrack_tuple otuple, rtuple;
1566 struct nf_conntrack_tuple_hash *h = NULL;
96bcf938 1567 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
7d367e06 1568 struct nf_conn *ct;
c1d10adb 1569 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 1570 u16 zone;
1571 int err;
1572
1573 err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
1574 if (err < 0)
1575 return err;
c1d10adb 1576
df6fb868 1577 if (cda[CTA_TUPLE_ORIG]) {
c1d10adb
PNA		 1578 err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3);
1579 if (err < 0)
1580 return err;
1581 }
1582
df6fb868 1583 if (cda[CTA_TUPLE_REPLY]) {
c1d10adb
PNA		 1584 err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3);
1585 if (err < 0)
1586 return err;
1587 }
1588
df6fb868 1589 if (cda[CTA_TUPLE_ORIG])
7d367e06 1590 h = nf_conntrack_find_get(net, zone, &otuple);
df6fb868 1591 else if (cda[CTA_TUPLE_REPLY])
7d367e06 1592 h = nf_conntrack_find_get(net, zone, &rtuple);
c1d10adb
PNA		 1593
1594 if (h == NULL) {
c1d10adb 1595 err = -ENOENT;
f0a3c086 1596 if (nlh->nlmsg_flags & NLM_F_CREATE) {
fecc1133 1597 enum ip_conntrack_events events;
5faa1f4c 1598
ef00f89f 1599 ct = ctnetlink_create_conntrack(net, zone, cda, &otuple,
f0a3c086 1600 &rtuple, u3);
7d367e06
JK		 1601 if (IS_ERR(ct))
1602 return PTR_ERR(ct);
1603
f0a3c086 1604 err = 0;
fecc1133
PNA		 1605 if (test_bit(IPS_EXPECTED_BIT, &ct->status))
1606 events = IPCT_RELATED;
1607 else
1608 events = IPCT_NEW;
1609
858b3133
PM		 1610 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1611 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1612 (1 << IPCT_HELPER) |
1613 (1 << IPCT_PROTOINFO) |
1614 (1 << IPCT_NATSEQADJ) |
1615 (1 << IPCT_MARK) | events,
15e47304 1616 ct, NETLINK_CB(skb).portid,
a0891aa6 1617 nlmsg_report(nlh));
f0a3c086 1618 nf_ct_put(ct);
7d367e06 1619 }
5faa1f4c 1620
c1d10adb
PNA		 1621 return err;
1622 }
1623 /* implicit 'else' */
1624
c1d10adb 1625 err = -EEXIST;
7d367e06 1626 ct = nf_ct_tuplehash_to_ctrack(h);
ff4ca827 1627 if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
7d367e06 1628 spin_lock_bh(&nf_conntrack_lock);
19abb7b0 1629 err = ctnetlink_change_conntrack(ct, cda);
7d367e06 1630 spin_unlock_bh(&nf_conntrack_lock);
19abb7b0 1631 if (err == 0) {
858b3133
PM		 1632 nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
1633 (1 << IPCT_ASSURED) |
a0891aa6
PNA		 1634 (1 << IPCT_HELPER) |
1635 (1 << IPCT_PROTOINFO) |
1636 (1 << IPCT_NATSEQADJ) |
1637 (1 << IPCT_MARK),
15e47304 1638 ct, NETLINK_CB(skb).portid,
a0891aa6 1639 nlmsg_report(nlh));
7d367e06 1640 }
ff4ca827 1641 }
c1d10adb 1642
7d367e06 1643 nf_ct_put(ct);
c1d10adb
PNA		 1644 return err;
1645}
1646
392025f8 1647static int
15e47304 1648ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
392025f8
PNA		 1649 __u16 cpu, const struct ip_conntrack_stat *st)
1650{
1651 struct nlmsghdr *nlh;
1652 struct nfgenmsg *nfmsg;
15e47304 1653 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 1654
1655 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU);
15e47304 1656 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 1657 if (nlh == NULL)
1658 goto nlmsg_failure;
1659
1660 nfmsg = nlmsg_data(nlh);
1661 nfmsg->nfgen_family = AF_UNSPEC;
1662 nfmsg->version = NFNETLINK_V0;
1663 nfmsg->res_id = htons(cpu);
1664
1665 if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) ||
1666 nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
1667 nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) ||
1668 nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
1669 nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
1670 nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) ||
1671 nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) ||
1672 nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
1673 nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
1674 htonl(st->insert_failed)) ||
1675 nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
1676 nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
1677 nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
1678 nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
1679 htonl(st->search_restart)))
1680 goto nla_put_failure;
1681
1682 nlmsg_end(skb, nlh);
1683 return skb->len;
1684
1685nla_put_failure:
1686nlmsg_failure:
1687 nlmsg_cancel(skb, nlh);
1688 return -1;
1689}
1690
1691static int
1692ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
1693{
1694 int cpu;
1695 struct net *net = sock_net(skb->sk);
1696
1697 if (cb->args[0] == nr_cpu_ids)
1698 return 0;
1699
1700 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
1701 const struct ip_conntrack_stat *st;
1702
1703 if (!cpu_possible(cpu))
1704 continue;
1705
1706 st = per_cpu_ptr(net->ct.stat, cpu);
1707 if (ctnetlink_ct_stat_cpu_fill_info(skb,
15e47304 1708 NETLINK_CB(cb->skb).portid,
392025f8
PNA		 1709 cb->nlh->nlmsg_seq,
1710 cpu, st) < 0)
1711 break;
1712 }
1713 cb->args[0] = cpu;
1714
1715 return skb->len;
1716}
1717
1718static int
1719ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb,
1720 const struct nlmsghdr *nlh,
1721 const struct nlattr * const cda[])
1722{
1723 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1724 struct netlink_dump_control c = {
1725 .dump = ctnetlink_ct_stat_cpu_dump,
1726 };
1727 return netlink_dump_start(ctnl, skb, nlh, &c);
1728 }
1729
1730 return 0;
1731}
1732
1733static int
15e47304 1734ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
392025f8
PNA		 1735 struct net *net)
1736{
1737 struct nlmsghdr *nlh;
1738 struct nfgenmsg *nfmsg;
15e47304 1739 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 1740 unsigned int nr_conntracks = atomic_read(&net->ct.count);
1741
1742 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS);
15e47304 1743 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 1744 if (nlh == NULL)
1745 goto nlmsg_failure;
1746
1747 nfmsg = nlmsg_data(nlh);
1748 nfmsg->nfgen_family = AF_UNSPEC;
1749 nfmsg->version = NFNETLINK_V0;
1750 nfmsg->res_id = 0;
1751
1752 if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
1753 goto nla_put_failure;
1754
1755 nlmsg_end(skb, nlh);
1756 return skb->len;
1757
1758nla_put_failure:
1759nlmsg_failure:
1760 nlmsg_cancel(skb, nlh);
1761 return -1;
1762}
1763
1764static int
1765ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb,
1766 const struct nlmsghdr *nlh,
1767 const struct nlattr * const cda[])
1768{
1769 struct sk_buff *skb2;
1770 int err;
1771
1772 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1773 if (skb2 == NULL)
1774 return -ENOMEM;
1775
15e47304 1776 err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
392025f8
PNA		 1777 nlh->nlmsg_seq,
1778 NFNL_MSG_TYPE(nlh->nlmsg_type),
1779 sock_net(skb->sk));
1780 if (err <= 0)
1781 goto free;
1782
15e47304 1783 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
392025f8
PNA		 1784 if (err < 0)
1785 goto out;
1786
1787 return 0;
1788
1789free:
1790 kfree_skb(skb2);
1791out:
1792 /* this avoids a loop in nfnetlink. */
1793 return err == -EAGAIN ? -ENOBUFS : err;
1794}
1795
7c622345 1796#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 1797static size_t
1798ctnetlink_nfqueue_build_size(const struct nf_conn *ct)
1799{
1800 return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
1801 + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
1802 + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
1803 + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
1804 + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
1805 + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
1806 + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
1807 + nla_total_size(0) /* CTA_PROTOINFO */
1808 + nla_total_size(0) /* CTA_HELP */
1809 + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
1810 + ctnetlink_secctx_size(ct)
1811#ifdef CONFIG_NF_NAT_NEEDED
1812 + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
1813 + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
1814#endif
1815#ifdef CONFIG_NF_CONNTRACK_MARK
1816 + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
1817#endif
1818 + ctnetlink_proto_size(ct)
1819 ;
1820}
1821
1822static int
1823ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
1824{
1825 struct nlattr *nest_parms;
1826
1827 rcu_read_lock();
1828 nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED);
1829 if (!nest_parms)
1830 goto nla_put_failure;
1831 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
1832 goto nla_put_failure;
1833 nla_nest_end(skb, nest_parms);
1834
1835 nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED);
1836 if (!nest_parms)
1837 goto nla_put_failure;
1838 if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
1839 goto nla_put_failure;
1840 nla_nest_end(skb, nest_parms);
1841
1842 if (nf_ct_zone(ct)) {
1843 if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct))))
1844 goto nla_put_failure;
1845 }
1846
1847 if (ctnetlink_dump_id(skb, ct) < 0)
1848 goto nla_put_failure;
1849
1850 if (ctnetlink_dump_status(skb, ct) < 0)
1851 goto nla_put_failure;
1852
1853 if (ctnetlink_dump_timeout(skb, ct) < 0)
1854 goto nla_put_failure;
1855
1856 if (ctnetlink_dump_protoinfo(skb, ct) < 0)
1857 goto nla_put_failure;
1858
1859 if (ctnetlink_dump_helpinfo(skb, ct) < 0)
1860 goto nla_put_failure;
1861
1862#ifdef CONFIG_NF_CONNTRACK_SECMARK
1863 if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
1864 goto nla_put_failure;
1865#endif
1866 if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
1867 goto nla_put_failure;
1868
1869 if ((ct->status & IPS_SEQ_ADJUST) &&
1870 ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
1871 goto nla_put_failure;
1872
1873#ifdef CONFIG_NF_CONNTRACK_MARK
1874 if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
1875 goto nla_put_failure;
1876#endif
1877 rcu_read_unlock();
1878 return 0;
1879
1880nla_put_failure:
1881 rcu_read_unlock();
1882 return -ENOSPC;
1883}
1884
1885static int
1886ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
1887{
1888 int err;
1889
1890 if (cda[CTA_TIMEOUT]) {
1891 err = ctnetlink_change_timeout(ct, cda);
1892 if (err < 0)
1893 return err;
1894 }
1895 if (cda[CTA_STATUS]) {
1896 err = ctnetlink_change_status(ct, cda);
1897 if (err < 0)
1898 return err;
1899 }
1900 if (cda[CTA_HELP]) {
1901 err = ctnetlink_change_helper(ct, cda);
1902 if (err < 0)
1903 return err;
1904 }
1905#if defined(CONFIG_NF_CONNTRACK_MARK)
1906 if (cda[CTA_MARK])
1907 ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
1908#endif
1909 return 0;
1910}
1911
1912static int
1913ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct)
1914{
1915 struct nlattr *cda[CTA_MAX+1];
68e035c9 1916 int ret;
9cb01766
PNA		 1917
1918 nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy);
1919
68e035c9
PNA		 1920 spin_lock_bh(&nf_conntrack_lock);
1921 ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct);
1922 spin_unlock_bh(&nf_conntrack_lock);
1923
1924 return ret;
9cb01766
PNA		 1925}
1926
1927static struct nfq_ct_hook ctnetlink_nfqueue_hook = {
1928 .build_size = ctnetlink_nfqueue_build_size,
1929 .build = ctnetlink_nfqueue_build,
1930 .parse = ctnetlink_nfqueue_parse,
1931};
7c622345 1932#endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */
9cb01766 1933
601e68e1
YH		 1934/***********************************************************************
1935 * EXPECT
1936 ***********************************************************************/
c1d10adb
PNA		 1937
1938static inline int
1939ctnetlink_exp_dump_tuple(struct sk_buff *skb,
1940 const struct nf_conntrack_tuple *tuple,
1941 enum ctattr_expect type)
1942{
df6fb868 1943 struct nlattr *nest_parms;
601e68e1 1944
df6fb868
PM		 1945 nest_parms = nla_nest_start(skb, type | NLA_F_NESTED);
1946 if (!nest_parms)
1947 goto nla_put_failure;
c1d10adb 1948 if (ctnetlink_dump_tuples(skb, tuple) < 0)
df6fb868
PM		 1949 goto nla_put_failure;
1950 nla_nest_end(skb, nest_parms);
c1d10adb
PNA		 1951
1952 return 0;
1953
df6fb868 1954nla_put_failure:
c1d10adb 1955 return -1;
601e68e1 1956}
c1d10adb 1957
1cde6436
PNA		 1958static inline int
1959ctnetlink_exp_dump_mask(struct sk_buff *skb,
1960 const struct nf_conntrack_tuple *tuple,
d4156e8c 1961 const struct nf_conntrack_tuple_mask *mask)
1cde6436
PNA		 1962{
1963 int ret;
1964 struct nf_conntrack_l3proto *l3proto;
605dcad6 1965 struct nf_conntrack_l4proto *l4proto;
d4156e8c 1966 struct nf_conntrack_tuple m;
df6fb868 1967 struct nlattr *nest_parms;
d4156e8c
PM		 1968
1969 memset(&m, 0xFF, sizeof(m));
d4156e8c 1970 memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
e578756c
PM		 1971 m.src.u.all = mask->src.u.all;
1972 m.dst.protonum = tuple->dst.protonum;
d4156e8c 1973
df6fb868
PM		 1974 nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED);
1975 if (!nest_parms)
1976 goto nla_put_failure;
1cde6436 1977
3b988ece 1978 rcu_read_lock();
528a3a6f 1979 l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
d4156e8c 1980 ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
3b988ece
HS		 1981 if (ret >= 0) {
1982 l4proto = __nf_ct_l4proto_find(tuple->src.l3num,
1983 tuple->dst.protonum);
d4156e8c 1984 ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
3b988ece
HS		 1985 }
1986 rcu_read_unlock();
1987
1cde6436 1988 if (unlikely(ret < 0))
df6fb868 1989 goto nla_put_failure;
1cde6436 1990
df6fb868 1991 nla_nest_end(skb, nest_parms);
1cde6436
PNA		 1992
1993 return 0;
1994
df6fb868 1995nla_put_failure:
1cde6436
PNA		 1996 return -1;
1997}
1998
c7232c99
PM		 1999static const union nf_inet_addr any_addr;
2000
bb5cf80e 2001static int
c1d10adb 2002ctnetlink_exp_dump_expect(struct sk_buff *skb,
601e68e1 2003 const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2004{
2005 struct nf_conn *master = exp->master;
c1216382 2006 long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
bc01befd 2007 struct nf_conn_help *help;
076a0ca0
PNA		 2008#ifdef CONFIG_NF_NAT_NEEDED
2009 struct nlattr *nest_parms;
2010 struct nf_conntrack_tuple nat_tuple = {};
2011#endif
544d5c7d
PNA		 2012 struct nf_ct_helper_expectfn *expfn;
2013
d978e5da
PM		 2014 if (timeout < 0)
2015 timeout = 0;
c1d10adb
PNA		 2016
2017 if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
df6fb868 2018 goto nla_put_failure;
1cde6436 2019 if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
df6fb868 2020 goto nla_put_failure;
c1d10adb
PNA		 2021 if (ctnetlink_exp_dump_tuple(skb,
2022 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
2023 CTA_EXPECT_MASTER) < 0)
df6fb868 2024 goto nla_put_failure;
601e68e1 2025
076a0ca0 2026#ifdef CONFIG_NF_NAT_NEEDED
c7232c99
PM		 2027 if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
2028 exp->saved_proto.all) {
076a0ca0
PNA		 2029 nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
2030 if (!nest_parms)
2031 goto nla_put_failure;
2032
cc1eb431
DM		 2033 if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
2034 goto nla_put_failure;
076a0ca0
PNA		 2035
2036 nat_tuple.src.l3num = nf_ct_l3num(master);
c7232c99 2037 nat_tuple.src.u3 = exp->saved_addr;
076a0ca0
PNA		 2038 nat_tuple.dst.protonum = nf_ct_protonum(master);
2039 nat_tuple.src.u = exp->saved_proto;
2040
2041 if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
2042 CTA_EXPECT_NAT_TUPLE) < 0)
2043 goto nla_put_failure;
2044 nla_nest_end(skb, nest_parms);
2045 }
2046#endif
cc1eb431
DM		 2047 if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
2048 nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
2049 nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
2050 nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
2051 goto nla_put_failure;
bc01befd
PNA		 2052 help = nfct_help(master);
2053 if (help) {
2054 struct nf_conntrack_helper *helper;
2055
2056 helper = rcu_dereference(help->helper);
cc1eb431
DM		 2057 if (helper &&
2058 nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
2059 goto nla_put_failure;
bc01befd 2060 }
544d5c7d 2061 expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
cc1eb431
DM		 2062 if (expfn != NULL &&
2063 nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
2064 goto nla_put_failure;
c1d10adb
PNA		 2065
2066 return 0;
601e68e1 2067
df6fb868 2068nla_put_failure:
c1d10adb
PNA		 2069 return -1;
2070}
2071
2072static int
15e47304 2073ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
8b0a231d 2074 int event, const struct nf_conntrack_expect *exp)
c1d10adb
PNA		 2075{
2076 struct nlmsghdr *nlh;
2077 struct nfgenmsg *nfmsg;
15e47304 2078 unsigned int flags = portid ? NLM_F_MULTI : 0;
c1d10adb
PNA		 2079
2080 event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2081 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
96bcf938
PNA		 2082 if (nlh == NULL)
2083 goto nlmsg_failure;
c1d10adb 2084
96bcf938 2085 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2086 nfmsg->nfgen_family = exp->tuple.src.l3num;
2087 nfmsg->version = NFNETLINK_V0;
2088 nfmsg->res_id = 0;
2089
2090 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2091 goto nla_put_failure;
c1d10adb 2092
96bcf938 2093 nlmsg_end(skb, nlh);
c1d10adb
PNA		 2094 return skb->len;
2095
2096nlmsg_failure:
df6fb868 2097nla_put_failure:
96bcf938 2098 nlmsg_cancel(skb, nlh);
c1d10adb
PNA		 2099 return -1;
2100}
2101
2102#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2103static int
2104ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
c1d10adb 2105{
9592a5c0
AD		 2106 struct nf_conntrack_expect *exp = item->exp;
2107 struct net *net = nf_ct_exp_net(exp);
c1d10adb
PNA		 2108 struct nlmsghdr *nlh;
2109 struct nfgenmsg *nfmsg;
c1d10adb 2110 struct sk_buff *skb;
ebbf41df 2111 unsigned int type, group;
c1d10adb
PNA		 2112 int flags = 0;
2113
ebbf41df
PNA		 2114 if (events & (1 << IPEXP_DESTROY)) {
2115 type = IPCTNL_MSG_EXP_DELETE;
2116 group = NFNLGRP_CONNTRACK_EXP_DESTROY;
2117 } else if (events & (1 << IPEXP_NEW)) {
c1d10adb
PNA		 2118 type = IPCTNL_MSG_EXP_NEW;
2119 flags = NLM_F_CREATE|NLM_F_EXCL;
ebbf41df 2120 group = NFNLGRP_CONNTRACK_EXP_NEW;
c1d10adb 2121 } else
e34d5c1a 2122 return 0;
c1d10adb 2123
ebbf41df 2124 if (!item->report && !nfnetlink_has_listeners(net, group))
e34d5c1a 2125 return 0;
b3a27bfb 2126
96bcf938
PNA		 2127 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
2128 if (skb == NULL)
150ace0d 2129 goto errout;
c1d10adb 2130
b633ad5f 2131 type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
15e47304 2132 nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
96bcf938
PNA		 2133 if (nlh == NULL)
2134 goto nlmsg_failure;
c1d10adb 2135
96bcf938 2136 nfmsg = nlmsg_data(nlh);
c1d10adb
PNA		 2137 nfmsg->nfgen_family = exp->tuple.src.l3num;
2138 nfmsg->version = NFNETLINK_V0;
2139 nfmsg->res_id = 0;
2140
528a3a6f 2141 rcu_read_lock();
c1d10adb 2142 if (ctnetlink_exp_dump_expect(skb, exp) < 0)
df6fb868 2143 goto nla_put_failure;
528a3a6f 2144 rcu_read_unlock();
c1d10adb 2145
96bcf938 2146 nlmsg_end(skb, nlh);
15e47304 2147 nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
e34d5c1a 2148 return 0;
c1d10adb 2149
df6fb868 2150nla_put_failure:
528a3a6f 2151 rcu_read_unlock();
96bcf938 2152 nlmsg_cancel(skb, nlh);
528a3a6f 2153nlmsg_failure:
c1d10adb 2154 kfree_skb(skb);
150ace0d 2155errout:
9592a5c0 2156 nfnetlink_set_err(net, 0, 0, -ENOBUFS);
e34d5c1a 2157 return 0;
c1d10adb
PNA		 2158}
2159#endif
cf6994c2
PM		 2160static int ctnetlink_exp_done(struct netlink_callback *cb)
2161{
31f15875
PM		 2162 if (cb->args[1])
2163 nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
cf6994c2
PM		 2164 return 0;
2165}
c1d10adb
PNA		 2166
2167static int
2168ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
2169{
9592a5c0 2170 struct net *net = sock_net(skb->sk);
cf6994c2 2171 struct nf_conntrack_expect *exp, *last;
96bcf938 2172 struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
31f15875 2173 struct hlist_node *n;
87711cb8 2174 u_int8_t l3proto = nfmsg->nfgen_family;
c1d10adb 2175
7d0742da 2176 rcu_read_lock();
31f15875
PM		 2177 last = (struct nf_conntrack_expect *)cb->args[1];
2178 for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
cf6994c2 2179restart:
9b03f38d 2180 hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]],
31f15875
PM		 2181 hnode) {
2182 if (l3proto && exp->tuple.src.l3num != l3proto)
cf6994c2 2183 continue;
31f15875
PM		 2184 if (cb->args[1]) {
2185 if (exp != last)
2186 continue;
2187 cb->args[1] = 0;
2188 }
8b0a231d 2189 if (ctnetlink_exp_fill_info(skb,
15e47304 2190 NETLINK_CB(cb->skb).portid,
31f15875
PM		 2191 cb->nlh->nlmsg_seq,
2192 IPCTNL_MSG_EXP_NEW,
8b0a231d 2193 exp) < 0) {
7d0742da
PM		 2194 if (!atomic_inc_not_zero(&exp->use))
2195 continue;
31f15875
PM		 2196 cb->args[1] = (unsigned long)exp;
2197 goto out;
2198 }
cf6994c2 2199 }
31f15875
PM		 2200 if (cb->args[1]) {
2201 cb->args[1] = 0;
2202 goto restart;
cf6994c2
PM		 2203 }
2204 }
601e68e1 2205out:
7d0742da 2206 rcu_read_unlock();
cf6994c2
PM		 2207 if (last)
2208 nf_ct_expect_put(last);
c1d10adb 2209
c1d10adb
PNA		 2210 return skb->len;
2211}
2212
f73e924c 2213static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
d0b0268f
PM		 2214 [CTA_EXPECT_MASTER] = { .type = NLA_NESTED },
2215 [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED },
2216 [CTA_EXPECT_MASK] = { .type = NLA_NESTED },
f73e924c
PM		 2217 [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
2218 [CTA_EXPECT_ID] = { .type = NLA_U32 },
d0b0268f 2219 [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING },
bcac0dfa 2220 [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
8b008faf 2221 [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
b8c5e52c 2222 [CTA_EXPECT_CLASS] = { .type = NLA_U32 },
076a0ca0 2223 [CTA_EXPECT_NAT] = { .type = NLA_NESTED },
544d5c7d 2224 [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING },
c1d10adb
PNA		 2225};
2226
2227static int
601e68e1 2228ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2229 const struct nlmsghdr *nlh,
2230 const struct nlattr * const cda[])
c1d10adb 2231{
9592a5c0 2232 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2233 struct nf_conntrack_tuple tuple;
2234 struct nf_conntrack_expect *exp;
2235 struct sk_buff *skb2;
96bcf938 2236 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2237 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2238 u16 zone;
2239 int err;
c1d10adb 2240
b8f3ab42 2241 if (nlh->nlmsg_flags & NLM_F_DUMP) {
80d326fa
PNA		 2242 struct netlink_dump_control c = {
2243 .dump = ctnetlink_exp_dump_table,
2244 .done = ctnetlink_exp_done,
2245 };
2246 return netlink_dump_start(ctnl, skb, nlh, &c);
c1d10adb
PNA		 2247 }
2248
ef00f89f
PM		 2249 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2250 if (err < 0)
2251 return err;
2252
35dba1d7
PNA		 2253 if (cda[CTA_EXPECT_TUPLE])
2254 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2255 else if (cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2256 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
2257 else
2258 return -EINVAL;
2259
2260 if (err < 0)
2261 return err;
2262
ef00f89f 2263 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2264 if (!exp)
2265 return -ENOENT;
2266
df6fb868 2267 if (cda[CTA_EXPECT_ID]) {
77236b6e 2268 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2269 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2270 nf_ct_expect_put(exp);
c1d10adb
PNA		 2271 return -ENOENT;
2272 }
601e68e1 2273 }
c1d10adb
PNA		 2274
2275 err = -ENOMEM;
96bcf938 2276 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
81378f72
PNA		 2277 if (skb2 == NULL) {
2278 nf_ct_expect_put(exp);
c1d10adb 2279 goto out;
81378f72 2280 }
4e9b8269 2281
528a3a6f 2282 rcu_read_lock();
15e47304 2283 err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
8b0a231d 2284 nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
528a3a6f 2285 rcu_read_unlock();
81378f72 2286 nf_ct_expect_put(exp);
c1d10adb
PNA		 2287 if (err <= 0)
2288 goto free;
2289
15e47304 2290 err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
81378f72
PNA		 2291 if (err < 0)
2292 goto out;
c1d10adb 2293
81378f72 2294 return 0;
c1d10adb
PNA		 2295
2296free:
2297 kfree_skb(skb2);
2298out:
81378f72
PNA		 2299 /* this avoids a loop in nfnetlink. */
2300 return err == -EAGAIN ? -ENOBUFS : err;
c1d10adb
PNA		 2301}
2302
2303static int
601e68e1 2304ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2305 const struct nlmsghdr *nlh,
2306 const struct nlattr * const cda[])
c1d10adb 2307{
9592a5c0 2308 struct net *net = sock_net(ctnl);
31f15875 2309 struct nf_conntrack_expect *exp;
c1d10adb 2310 struct nf_conntrack_tuple tuple;
96bcf938 2311 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
31f15875 2312 struct hlist_node *n, *next;
c1d10adb 2313 u_int8_t u3 = nfmsg->nfgen_family;
31f15875 2314 unsigned int i;
ef00f89f 2315 u16 zone;
c1d10adb
PNA		 2316 int err;
2317
df6fb868 2318 if (cda[CTA_EXPECT_TUPLE]) {
c1d10adb 2319 /* delete a single expect by tuple */
ef00f89f
PM		 2320 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2321 if (err < 0)
2322 return err;
2323
c1d10adb
PNA		 2324 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2325 if (err < 0)
2326 return err;
2327
2328 /* bump usage count to 2 */
ef00f89f 2329 exp = nf_ct_expect_find_get(net, zone, &tuple);
c1d10adb
PNA		 2330 if (!exp)
2331 return -ENOENT;
2332
df6fb868 2333 if (cda[CTA_EXPECT_ID]) {
77236b6e 2334 __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
35832402 2335 if (ntohl(id) != (u32)(unsigned long)exp) {
6823645d 2336 nf_ct_expect_put(exp);
c1d10adb
PNA		 2337 return -ENOENT;
2338 }
2339 }
2340
2341 /* after list removal, usage count == 1 */
ebbf41df
PNA		 2342 spin_lock_bh(&nf_conntrack_lock);
2343 if (del_timer(&exp->timeout)) {
15e47304 2344 nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
ebbf41df
PNA		 2345 nlmsg_report(nlh));
2346 nf_ct_expect_put(exp);
2347 }
2348 spin_unlock_bh(&nf_conntrack_lock);
601e68e1 2349 /* have to put what we 'get' above.
c1d10adb 2350 * after this line usage count == 0 */
6823645d 2351 nf_ct_expect_put(exp);
df6fb868
PM		 2352 } else if (cda[CTA_EXPECT_HELP_NAME]) {
2353 char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);
31f15875 2354 struct nf_conn_help *m_help;
c1d10adb
PNA		 2355
2356 /* delete all expectations for this helper */
f8ba1aff 2357 spin_lock_bh(&nf_conntrack_lock);
31f15875
PM		 2358 for (i = 0; i < nf_ct_expect_hsize; i++) {
2359 hlist_for_each_entry_safe(exp, n, next,
9592a5c0 2360 &net->ct.expect_hash[i],
31f15875
PM		 2361 hnode) {
2362 m_help = nfct_help(exp->master);
794e6871
PM		 2363 if (!strcmp(m_help->helper->name, name) &&
2364 del_timer(&exp->timeout)) {
ebbf41df 2365 nf_ct_unlink_expect_report(exp,
15e47304 2366 NETLINK_CB(skb).portid,
ebbf41df 2367 nlmsg_report(nlh));
31f15875
PM		 2368 nf_ct_expect_put(exp);
2369 }
c1d10adb
PNA		 2370 }
2371 }
f8ba1aff 2372 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2373 } else {
2374 /* This basically means we have to flush everything*/
f8ba1aff 2375 spin_lock_bh(&nf_conntrack_lock);
31f15875
PM		 2376 for (i = 0; i < nf_ct_expect_hsize; i++) {
2377 hlist_for_each_entry_safe(exp, n, next,
9592a5c0 2378 &net->ct.expect_hash[i],
31f15875
PM		 2379 hnode) {
2380 if (del_timer(&exp->timeout)) {
ebbf41df 2381 nf_ct_unlink_expect_report(exp,
15e47304 2382 NETLINK_CB(skb).portid,
ebbf41df 2383 nlmsg_report(nlh));
31f15875
PM		 2384 nf_ct_expect_put(exp);
2385 }
c1d10adb
PNA		 2386 }
2387 }
f8ba1aff 2388 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb
PNA		 2389 }
2390
2391 return 0;
2392}
2393static int
39938324
PM		 2394ctnetlink_change_expect(struct nf_conntrack_expect *x,
2395 const struct nlattr * const cda[])
c1d10adb 2396{
9768e1ac
KW		 2397 if (cda[CTA_EXPECT_TIMEOUT]) {
2398 if (!del_timer(&x->timeout))
2399 return -ETIME;
2400
2401 x->timeout.expires = jiffies +
2402 ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
2403 add_timer(&x->timeout);
2404 }
2405 return 0;
c1d10adb
PNA		 2406}
2407
076a0ca0
PNA		 2408static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = {
2409 [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 },
2410 [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED },
2411};
2412
2413static int
2414ctnetlink_parse_expect_nat(const struct nlattr *attr,
2415 struct nf_conntrack_expect *exp,
2416 u_int8_t u3)
2417{
2418#ifdef CONFIG_NF_NAT_NEEDED
2419 struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
2420 struct nf_conntrack_tuple nat_tuple = {};
2421 int err;
2422
2423 nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy);
2424
2425 if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
2426 return -EINVAL;
2427
2428 err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
2429 &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3);
2430 if (err < 0)
2431 return err;
2432
c7232c99 2433 exp->saved_addr = nat_tuple.src.u3;
076a0ca0
PNA		 2434 exp->saved_proto = nat_tuple.src.u;
2435 exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
2436
2437 return 0;
2438#else
2439 return -EOPNOTSUPP;
2440#endif
2441}
2442
c1d10adb 2443static int
ef00f89f
PM		 2444ctnetlink_create_expect(struct net *net, u16 zone,
2445 const struct nlattr * const cda[],
9592a5c0 2446 u_int8_t u3,
15e47304 2447 u32 portid, int report)
c1d10adb
PNA		 2448{
2449 struct nf_conntrack_tuple tuple, mask, master_tuple;
2450 struct nf_conntrack_tuple_hash *h = NULL;
2451 struct nf_conntrack_expect *exp;
2452 struct nf_conn *ct;
dc808fe2 2453 struct nf_conn_help *help;
660fdb2a 2454 struct nf_conntrack_helper *helper = NULL;
b8c5e52c 2455 u_int32_t class = 0;
c1d10adb
PNA		 2456 int err = 0;
2457
c1d10adb
PNA		 2458 /* caller guarantees that those three CTA_EXPECT_* exist */
2459 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2460 if (err < 0)
2461 return err;
2462 err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3);
2463 if (err < 0)
2464 return err;
2465 err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3);
2466 if (err < 0)
2467 return err;
2468
2469 /* Look for master conntrack of this expectation */
ef00f89f 2470 h = nf_conntrack_find_get(net, zone, &master_tuple);
c1d10adb
PNA		 2471 if (!h)
2472 return -ENOENT;
2473 ct = nf_ct_tuplehash_to_ctrack(h);
660fdb2a
PNA		 2474
2475 /* Look for helper of this expectation */
2476 if (cda[CTA_EXPECT_HELP_NAME]) {
2477 const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);
2478
2479 helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2480 nf_ct_protonum(ct));
2481 if (helper == NULL) {
2482#ifdef CONFIG_MODULES
2483 if (request_module("nfct-helper-%s", helpname) < 0) {
2484 err = -EOPNOTSUPP;
2485 goto out;
2486 }
2487
2488 helper = __nf_conntrack_helper_find(helpname,
2489 nf_ct_l3num(ct),
2490 nf_ct_protonum(ct));
2491 if (helper) {
2492 err = -EAGAIN;
2493 goto out;
2494 }
2495#endif
2496 err = -EOPNOTSUPP;
2497 goto out;
2498 }
2499 }
2500
b8c5e52c
PNA		 2501 if (cda[CTA_EXPECT_CLASS] && helper) {
2502 class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
2503 if (class > helper->expect_class_max) {
2504 err = -EINVAL;
2505 goto out;
2506 }
2507 }
6823645d 2508 exp = nf_ct_expect_alloc(ct);
c1d10adb
PNA		 2509 if (!exp) {
2510 err = -ENOMEM;
2511 goto out;
2512 }
bc01befd
PNA		 2513 help = nfct_help(ct);
2514 if (!help) {
2515 if (!cda[CTA_EXPECT_TIMEOUT]) {
2516 err = -EINVAL;
2517 goto out;
2518 }
2519 exp->timeout.expires =
2520 jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
601e68e1 2521
bc01befd
PNA		 2522 exp->flags = NF_CT_EXPECT_USERSPACE;
2523 if (cda[CTA_EXPECT_FLAGS]) {
2524 exp->flags |=
2525 ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2526 }
2527 } else {
2528 if (cda[CTA_EXPECT_FLAGS]) {
2529 exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
2530 exp->flags &= ~NF_CT_EXPECT_USERSPACE;
2531 } else
2532 exp->flags = 0;
2533 }
544d5c7d
PNA		 2534 if (cda[CTA_EXPECT_FN]) {
2535 const char *name = nla_data(cda[CTA_EXPECT_FN]);
2536 struct nf_ct_helper_expectfn *expfn;
2537
2538 expfn = nf_ct_helper_expectfn_find_by_name(name);
2539 if (expfn == NULL) {
2540 err = -EINVAL;
2541 goto err_out;
2542 }
2543 exp->expectfn = expfn->expectfn;
2544 } else
2545 exp->expectfn = NULL;
601e68e1 2546
b8c5e52c 2547 exp->class = class;
c1d10adb 2548 exp->master = ct;
660fdb2a 2549 exp->helper = helper;
c1d10adb 2550 memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
d4156e8c
PM		 2551 memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
2552 exp->mask.src.u.all = mask.src.u.all;
c1d10adb 2553
076a0ca0
PNA		 2554 if (cda[CTA_EXPECT_NAT]) {
2555 err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
2556 exp, u3);
2557 if (err < 0)
2558 goto err_out;
2559 }
15e47304 2560 err = nf_ct_expect_related_report(exp, portid, report);
076a0ca0 2561err_out:
6823645d 2562 nf_ct_expect_put(exp);
601e68e1 2563out:
c1d10adb
PNA		 2564 nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
2565 return err;
2566}
2567
2568static int
2569ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
39938324
PM		 2570 const struct nlmsghdr *nlh,
2571 const struct nlattr * const cda[])
c1d10adb 2572{
9592a5c0 2573 struct net *net = sock_net(ctnl);
c1d10adb
PNA		 2574 struct nf_conntrack_tuple tuple;
2575 struct nf_conntrack_expect *exp;
96bcf938 2576 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
c1d10adb 2577 u_int8_t u3 = nfmsg->nfgen_family;
ef00f89f
PM		 2578 u16 zone;
2579 int err;
c1d10adb 2580
df6fb868
PM		 2581 if (!cda[CTA_EXPECT_TUPLE]
2582 || !cda[CTA_EXPECT_MASK]
2583 || !cda[CTA_EXPECT_MASTER])
c1d10adb
PNA		 2584 return -EINVAL;
2585
ef00f89f
PM		 2586 err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
2587 if (err < 0)
2588 return err;
2589
c1d10adb
PNA		 2590 err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
2591 if (err < 0)
2592 return err;
2593
f8ba1aff 2594 spin_lock_bh(&nf_conntrack_lock);
ef00f89f 2595 exp = __nf_ct_expect_find(net, zone, &tuple);
c1d10adb
PNA		 2596
2597 if (!exp) {
f8ba1aff 2598 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2599 err = -ENOENT;
19abb7b0 2600 if (nlh->nlmsg_flags & NLM_F_CREATE) {
ef00f89f 2601 err = ctnetlink_create_expect(net, zone, cda,
19abb7b0 2602 u3,
15e47304 2603 NETLINK_CB(skb).portid,
19abb7b0
PNA		 2604 nlmsg_report(nlh));
2605 }
c1d10adb
PNA		 2606 return err;
2607 }
2608
2609 err = -EEXIST;
2610 if (!(nlh->nlmsg_flags & NLM_F_EXCL))
2611 err = ctnetlink_change_expect(exp, cda);
f8ba1aff 2612 spin_unlock_bh(&nf_conntrack_lock);
c1d10adb 2613
c1d10adb
PNA		 2614 return err;
2615}
2616
392025f8 2617static int
15e47304 2618ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
392025f8
PNA		 2619 const struct ip_conntrack_stat *st)
2620{
2621 struct nlmsghdr *nlh;
2622 struct nfgenmsg *nfmsg;
15e47304 2623 unsigned int flags = portid ? NLM_F_MULTI : 0, event;
392025f8
PNA		 2624
2625 event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU);
15e47304 2626 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
392025f8
PNA		 2627 if (nlh == NULL)
2628 goto nlmsg_failure;
2629
2630 nfmsg = nlmsg_data(nlh);
2631 nfmsg->nfgen_family = AF_UNSPEC;
2632 nfmsg->version = NFNETLINK_V0;
2633 nfmsg->res_id = htons(cpu);
2634
2635 if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
2636 nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
2637 nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
2638 goto nla_put_failure;
2639
2640 nlmsg_end(skb, nlh);
2641 return skb->len;
2642
2643nla_put_failure:
2644nlmsg_failure:
2645 nlmsg_cancel(skb, nlh);
2646 return -1;
2647}
2648
2649static int
2650ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
2651{
2652 int cpu;
2653 struct net *net = sock_net(skb->sk);
2654
2655 if (cb->args[0] == nr_cpu_ids)
2656 return 0;
2657
2658 for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
2659 const struct ip_conntrack_stat *st;
2660
2661 if (!cpu_possible(cpu))
2662 continue;
2663
2664 st = per_cpu_ptr(net->ct.stat, cpu);
15e47304 2665 if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
392025f8
PNA		 2666 cb->nlh->nlmsg_seq,
2667 cpu, st) < 0)
2668 break;
2669 }
2670 cb->args[0] = cpu;
2671
2672 return skb->len;
2673}
2674
2675static int
2676ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb,
2677 const struct nlmsghdr *nlh,
2678 const struct nlattr * const cda[])
2679{
2680 if (nlh->nlmsg_flags & NLM_F_DUMP) {
2681 struct netlink_dump_control c = {
2682 .dump = ctnetlink_exp_stat_cpu_dump,
2683 };
2684 return netlink_dump_start(ctnl, skb, nlh, &c);
2685 }
2686
2687 return 0;
2688}
2689
c1d10adb 2690#ifdef CONFIG_NF_CONNTRACK_EVENTS
e34d5c1a
PNA		 2691static struct nf_ct_event_notifier ctnl_notifier = {
2692 .fcn = ctnetlink_conntrack_event,
c1d10adb
PNA		 2693};
2694
e34d5c1a
PNA		 2695static struct nf_exp_event_notifier ctnl_notifier_exp = {
2696 .fcn = ctnetlink_expect_event,
c1d10adb
PNA		 2697};
2698#endif
2699
7c8d4cb4 2700static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
c1d10adb 2701 [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
f73e924c
PM		 2702 .attr_count = CTA_MAX,
2703 .policy = ct_nla_policy },
c1d10adb 2704 [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 2705 .attr_count = CTA_MAX,
2706 .policy = ct_nla_policy },
c1d10adb 2707 [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
f73e924c
PM		 2708 .attr_count = CTA_MAX,
2709 .policy = ct_nla_policy },
c1d10adb 2710 [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
f73e924c
PM		 2711 .attr_count = CTA_MAX,
2712 .policy = ct_nla_policy },
392025f8
PNA		 2713 [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu },
2714 [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct },
c1d10adb
PNA		 2715};
2716
7c8d4cb4 2717static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
c1d10adb 2718 [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
f73e924c
PM		 2719 .attr_count = CTA_EXPECT_MAX,
2720 .policy = exp_nla_policy },
c1d10adb 2721 [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
f73e924c
PM		 2722 .attr_count = CTA_EXPECT_MAX,
2723 .policy = exp_nla_policy },
c1d10adb 2724 [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
f73e924c
PM		 2725 .attr_count = CTA_EXPECT_MAX,
2726 .policy = exp_nla_policy },
392025f8 2727 [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu },
c1d10adb
PNA		 2728};
2729
7c8d4cb4 2730static const struct nfnetlink_subsystem ctnl_subsys = {
c1d10adb
PNA		 2731 .name = "conntrack",
2732 .subsys_id = NFNL_SUBSYS_CTNETLINK,
2733 .cb_count = IPCTNL_MSG_MAX,
2734 .cb = ctnl_cb,
2735};
2736
7c8d4cb4 2737static const struct nfnetlink_subsystem ctnl_exp_subsys = {
c1d10adb
PNA		 2738 .name = "conntrack_expect",
2739 .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
2740 .cb_count = IPCTNL_MSG_EXP_MAX,
2741 .cb = ctnl_exp_cb,
2742};
2743
d2483dde 2744MODULE_ALIAS("ip_conntrack_netlink");
c1d10adb 2745MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
34f9a2e4 2746MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
c1d10adb 2747
70e9942f
PNA		 2748static int __net_init ctnetlink_net_init(struct net *net)
2749{
2750#ifdef CONFIG_NF_CONNTRACK_EVENTS
2751 int ret;
2752
2753 ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
2754 if (ret < 0) {
2755 pr_err("ctnetlink_init: cannot register notifier.\n");
2756 goto err_out;
2757 }
2758
2759 ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
2760 if (ret < 0) {
2761 pr_err("ctnetlink_init: cannot expect register notifier.\n");
2762 goto err_unreg_notifier;
2763 }
2764#endif
2765 return 0;
2766
2767#ifdef CONFIG_NF_CONNTRACK_EVENTS
2768err_unreg_notifier:
2769 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2770err_out:
2771 return ret;
2772#endif
2773}
2774
2775static void ctnetlink_net_exit(struct net *net)
2776{
2777#ifdef CONFIG_NF_CONNTRACK_EVENTS
2778 nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
2779 nf_conntrack_unregister_notifier(net, &ctnl_notifier);
2780#endif
2781}
2782
2783static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
2784{
2785 struct net *net;
2786
2787 list_for_each_entry(net, net_exit_list, exit_list)
2788 ctnetlink_net_exit(net);
2789}
2790
2791static struct pernet_operations ctnetlink_net_ops = {
2792 .init = ctnetlink_net_init,
2793 .exit_batch = ctnetlink_net_exit_batch,
2794};
2795
c1d10adb
PNA		 2796static int __init ctnetlink_init(void)
2797{
2798 int ret;
2799
654d0fbd 2800 pr_info("ctnetlink v%s: registering with nfnetlink.\n", version);
c1d10adb
PNA		 2801 ret = nfnetlink_subsys_register(&ctnl_subsys);
2802 if (ret < 0) {
654d0fbd 2803 pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
c1d10adb
PNA		 2804 goto err_out;
2805 }
2806
2807 ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
2808 if (ret < 0) {
654d0fbd 2809 pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
c1d10adb
PNA		 2810 goto err_unreg_subsys;
2811 }
2812
ef6acf68
JL		 2813 ret = register_pernet_subsys(&ctnetlink_net_ops);
2814 if (ret < 0) {
70e9942f 2815 pr_err("ctnetlink_init: cannot register pernet operations\n");
c1d10adb
PNA		 2816 goto err_unreg_exp_subsys;
2817 }
7c622345 2818#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 2819 /* setup interaction between nf_queue and nf_conntrack_netlink. */
2820 RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook);
2821#endif
c1d10adb
PNA		 2822 return 0;
2823
c1d10adb
PNA		 2824err_unreg_exp_subsys:
2825 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
c1d10adb
PNA		 2826err_unreg_subsys:
2827 nfnetlink_subsys_unregister(&ctnl_subsys);
2828err_out:
2829 return ret;
2830}
2831
2832static void __exit ctnetlink_exit(void)
2833{
654d0fbd 2834 pr_info("ctnetlink: unregistering from nfnetlink.\n");
c1d10adb 2835
70e9942f 2836 unregister_pernet_subsys(&ctnetlink_net_ops);
c1d10adb
PNA		 2837 nfnetlink_subsys_unregister(&ctnl_exp_subsys);
2838 nfnetlink_subsys_unregister(&ctnl_subsys);
7c622345 2839#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
9cb01766
PNA		 2840 RCU_INIT_POINTER(nfq_ct_hook, NULL);
2841#endif
c1d10adb
PNA		 2842}
2843
2844module_init(ctnetlink_init);
2845module_exit(ctnetlink_exit);
Linux kernel - Deliverables
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