Commit | Line | Data |
---|---|---|
c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
392025f8 | 7 | * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
1cc63249 | 25 | #include <linux/security.h> |
c1d10adb PNA |
26 | #include <linux/skbuff.h> |
27 | #include <linux/errno.h> | |
28 | #include <linux/netlink.h> | |
29 | #include <linux/spinlock.h> | |
40a839fd | 30 | #include <linux/interrupt.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
c1d10adb PNA |
32 | |
33 | #include <linux/netfilter.h> | |
dc5fc579 | 34 | #include <net/netlink.h> |
9592a5c0 | 35 | #include <net/sock.h> |
c1d10adb PNA |
36 | #include <net/netfilter/nf_conntrack.h> |
37 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 38 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb | 39 | #include <net/netfilter/nf_conntrack_helper.h> |
41d73ec0 | 40 | #include <net/netfilter/nf_conntrack_seqadj.h> |
c1d10adb | 41 | #include <net/netfilter/nf_conntrack_l3proto.h> |
605dcad6 | 42 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 43 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 44 | #include <net/netfilter/nf_conntrack_acct.h> |
ef00f89f | 45 | #include <net/netfilter/nf_conntrack_zones.h> |
a992ca2a | 46 | #include <net/netfilter/nf_conntrack_timestamp.h> |
c539f017 | 47 | #include <net/netfilter/nf_conntrack_labels.h> |
87e94dbc | 48 | #include <net/netfilter/nf_conntrack_synproxy.h> |
5b1158e9 JK |
49 | #ifdef CONFIG_NF_NAT_NEEDED |
50 | #include <net/netfilter/nf_nat_core.h> | |
c7232c99 | 51 | #include <net/netfilter/nf_nat_l4proto.h> |
8c88f87c | 52 | #include <net/netfilter/nf_nat_helper.h> |
5b1158e9 | 53 | #endif |
c1d10adb PNA |
54 | |
55 | #include <linux/netfilter/nfnetlink.h> | |
56 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
57 | ||
58 | MODULE_LICENSE("GPL"); | |
59 | ||
4054ff45 | 60 | static int ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
2a04aabf JL |
61 | const struct nf_conntrack_tuple *tuple, |
62 | const 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 | 80 | nla_put_failure: |
c1d10adb PNA |
81 | return -1; |
82 | } | |
83 | ||
4054ff45 PNA |
84 | static int ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
85 | const struct nf_conntrack_tuple *tuple, | |
2a04aabf | 86 | const struct nf_conntrack_l3proto *l3proto) |
c1d10adb | 87 | { |
c1d10adb | 88 | int ret = 0; |
df6fb868 PM |
89 | struct nlattr *nest_parms; |
90 | ||
91 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
92 | if (!nest_parms) | |
93 | goto nla_put_failure; | |
1cde6436 | 94 | |
fdf70832 PM |
95 | if (likely(l3proto->tuple_to_nlattr)) |
96 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 97 | |
df6fb868 | 98 | nla_nest_end(skb, nest_parms); |
c1d10adb | 99 | |
1cde6436 PNA |
100 | return ret; |
101 | ||
df6fb868 | 102 | nla_put_failure: |
1cde6436 PNA |
103 | return -1; |
104 | } | |
105 | ||
4054ff45 PNA |
106 | static int ctnetlink_dump_tuples(struct sk_buff *skb, |
107 | const struct nf_conntrack_tuple *tuple) | |
1cde6436 | 108 | { |
b3480fe0 FW |
109 | const struct nf_conntrack_l3proto *l3proto; |
110 | const struct nf_conntrack_l4proto *l4proto; | |
1cde6436 | 111 | int ret; |
1cde6436 | 112 | |
3b988ece | 113 | rcu_read_lock(); |
528a3a6f | 114 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 115 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb | 116 | |
3b988ece HS |
117 | if (ret >= 0) { |
118 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
119 | tuple->dst.protonum); | |
120 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); | |
121 | } | |
122 | rcu_read_unlock(); | |
c1d10adb | 123 | return ret; |
c1d10adb PNA |
124 | } |
125 | ||
4054ff45 PNA |
126 | static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype, |
127 | const struct nf_conntrack_zone *zone, int dir) | |
deedb590 DB |
128 | { |
129 | if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir) | |
130 | return 0; | |
131 | if (nla_put_be16(skb, attrtype, htons(zone->id))) | |
132 | goto nla_put_failure; | |
133 | return 0; | |
134 | ||
135 | nla_put_failure: | |
136 | return -1; | |
137 | } | |
138 | ||
4054ff45 | 139 | static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 140 | { |
cc1eb431 DM |
141 | if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status))) |
142 | goto nla_put_failure; | |
c1d10adb PNA |
143 | return 0; |
144 | ||
df6fb868 | 145 | nla_put_failure: |
c1d10adb PNA |
146 | return -1; |
147 | } | |
148 | ||
4054ff45 | 149 | static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 150 | { |
d0b35b93 | 151 | long timeout = nf_ct_expires(ct) / HZ; |
601e68e1 | 152 | |
cc1eb431 DM |
153 | if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout))) |
154 | goto nla_put_failure; | |
c1d10adb PNA |
155 | return 0; |
156 | ||
df6fb868 | 157 | nla_put_failure: |
c1d10adb PNA |
158 | return -1; |
159 | } | |
160 | ||
4054ff45 | 161 | static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 162 | { |
b3480fe0 | 163 | const struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 164 | struct nlattr *nest_proto; |
c1d10adb PNA |
165 | int ret; |
166 | ||
528a3a6f PNA |
167 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
168 | if (!l4proto->to_nlattr) | |
c1d10adb | 169 | return 0; |
601e68e1 | 170 | |
df6fb868 PM |
171 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
172 | if (!nest_proto) | |
173 | goto nla_put_failure; | |
c1d10adb | 174 | |
fdf70832 | 175 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 176 | |
df6fb868 | 177 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
178 | |
179 | return ret; | |
180 | ||
df6fb868 | 181 | nla_put_failure: |
c1d10adb PNA |
182 | return -1; |
183 | } | |
184 | ||
4054ff45 PNA |
185 | static int ctnetlink_dump_helpinfo(struct sk_buff *skb, |
186 | const struct nf_conn *ct) | |
c1d10adb | 187 | { |
df6fb868 | 188 | struct nlattr *nest_helper; |
dc808fe2 | 189 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 190 | struct nf_conntrack_helper *helper; |
c1d10adb | 191 | |
3c158f7f | 192 | if (!help) |
c1d10adb | 193 | return 0; |
601e68e1 | 194 | |
3c158f7f PM |
195 | helper = rcu_dereference(help->helper); |
196 | if (!helper) | |
197 | goto out; | |
198 | ||
df6fb868 PM |
199 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
200 | if (!nest_helper) | |
201 | goto nla_put_failure; | |
cc1eb431 DM |
202 | if (nla_put_string(skb, CTA_HELP_NAME, helper->name)) |
203 | goto nla_put_failure; | |
c1d10adb | 204 | |
fdf70832 PM |
205 | if (helper->to_nlattr) |
206 | helper->to_nlattr(skb, ct); | |
c1d10adb | 207 | |
df6fb868 | 208 | nla_nest_end(skb, nest_helper); |
3c158f7f | 209 | out: |
c1d10adb PNA |
210 | return 0; |
211 | ||
df6fb868 | 212 | nla_put_failure: |
c1d10adb PNA |
213 | return -1; |
214 | } | |
215 | ||
bb5cf80e | 216 | static int |
4542fa47 HE |
217 | dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct, |
218 | enum ip_conntrack_dir dir, int type) | |
c1d10adb | 219 | { |
4542fa47 HE |
220 | enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
221 | struct nf_conn_counter *counter = acct->counter; | |
df6fb868 | 222 | struct nlattr *nest_count; |
4542fa47 | 223 | u64 pkts, bytes; |
c1d10adb | 224 | |
4542fa47 HE |
225 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
226 | pkts = atomic64_xchg(&counter[dir].packets, 0); | |
227 | bytes = atomic64_xchg(&counter[dir].bytes, 0); | |
228 | } else { | |
229 | pkts = atomic64_read(&counter[dir].packets); | |
230 | bytes = atomic64_read(&counter[dir].bytes); | |
231 | } | |
232 | ||
233 | nest_count = nla_nest_start(skb, attr | NLA_F_NESTED); | |
df6fb868 PM |
234 | if (!nest_count) |
235 | goto nla_put_failure; | |
236 | ||
b46f6ded ND |
237 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts), |
238 | CTA_COUNTERS_PAD) || | |
239 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes), | |
240 | CTA_COUNTERS_PAD)) | |
cc1eb431 | 241 | goto nla_put_failure; |
c1d10adb | 242 | |
df6fb868 | 243 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
244 | |
245 | return 0; | |
246 | ||
df6fb868 | 247 | nla_put_failure: |
c1d10adb PNA |
248 | return -1; |
249 | } | |
c1d10adb | 250 | |
80e60e67 | 251 | static int |
4542fa47 | 252 | ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type) |
80e60e67 | 253 | { |
4542fa47 | 254 | struct nf_conn_acct *acct = nf_conn_acct_find(ct); |
80e60e67 | 255 | |
80e60e67 PNA |
256 | if (!acct) |
257 | return 0; | |
258 | ||
4542fa47 HE |
259 | if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0) |
260 | return -1; | |
261 | if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0) | |
262 | return -1; | |
263 | ||
264 | return 0; | |
80e60e67 PNA |
265 | } |
266 | ||
a992ca2a PNA |
267 | static int |
268 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) | |
269 | { | |
270 | struct nlattr *nest_count; | |
271 | const struct nf_conn_tstamp *tstamp; | |
272 | ||
273 | tstamp = nf_conn_tstamp_find(ct); | |
274 | if (!tstamp) | |
275 | return 0; | |
276 | ||
277 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); | |
278 | if (!nest_count) | |
279 | goto nla_put_failure; | |
280 | ||
b46f6ded ND |
281 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start), |
282 | CTA_TIMESTAMP_PAD) || | |
cc1eb431 | 283 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, |
b46f6ded ND |
284 | cpu_to_be64(tstamp->stop), |
285 | CTA_TIMESTAMP_PAD))) | |
cc1eb431 | 286 | goto nla_put_failure; |
a992ca2a PNA |
287 | nla_nest_end(skb, nest_count); |
288 | ||
289 | return 0; | |
290 | ||
291 | nla_put_failure: | |
292 | return -1; | |
293 | } | |
294 | ||
c1d10adb | 295 | #ifdef CONFIG_NF_CONNTRACK_MARK |
4054ff45 | 296 | static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 297 | { |
cc1eb431 DM |
298 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
299 | goto nla_put_failure; | |
c1d10adb PNA |
300 | return 0; |
301 | ||
df6fb868 | 302 | nla_put_failure: |
c1d10adb PNA |
303 | return -1; |
304 | } | |
305 | #else | |
306 | #define ctnetlink_dump_mark(a, b) (0) | |
307 | #endif | |
308 | ||
37fccd85 | 309 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
4054ff45 | 310 | static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) |
37fccd85 | 311 | { |
1cc63249 EP |
312 | struct nlattr *nest_secctx; |
313 | int len, ret; | |
314 | char *secctx; | |
315 | ||
316 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
317 | if (ret) | |
cba85b53 | 318 | return 0; |
1cc63249 EP |
319 | |
320 | ret = -1; | |
321 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); | |
322 | if (!nest_secctx) | |
323 | goto nla_put_failure; | |
37fccd85 | 324 | |
cc1eb431 DM |
325 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
326 | goto nla_put_failure; | |
1cc63249 EP |
327 | nla_nest_end(skb, nest_secctx); |
328 | ||
329 | ret = 0; | |
37fccd85 | 330 | nla_put_failure: |
1cc63249 EP |
331 | security_release_secctx(secctx, len); |
332 | return ret; | |
37fccd85 PNA |
333 | } |
334 | #else | |
1cc63249 | 335 | #define ctnetlink_dump_secctx(a, b) (0) |
37fccd85 PNA |
336 | #endif |
337 | ||
0ceabd83 | 338 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
4a96300c | 339 | static inline int ctnetlink_label_size(const struct nf_conn *ct) |
0ceabd83 FW |
340 | { |
341 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
342 | ||
343 | if (!labels) | |
344 | return 0; | |
23014011 | 345 | return nla_total_size(sizeof(labels->bits)); |
0ceabd83 FW |
346 | } |
347 | ||
348 | static int | |
349 | ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) | |
350 | { | |
351 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
23014011 | 352 | unsigned int i; |
0ceabd83 FW |
353 | |
354 | if (!labels) | |
355 | return 0; | |
356 | ||
0ceabd83 FW |
357 | i = 0; |
358 | do { | |
359 | if (labels->bits[i] != 0) | |
23014011 FW |
360 | return nla_put(skb, CTA_LABELS, sizeof(labels->bits), |
361 | labels->bits); | |
0ceabd83 | 362 | i++; |
23014011 | 363 | } while (i < ARRAY_SIZE(labels->bits)); |
0ceabd83 FW |
364 | |
365 | return 0; | |
366 | } | |
367 | #else | |
368 | #define ctnetlink_dump_labels(a, b) (0) | |
369 | #define ctnetlink_label_size(a) (0) | |
370 | #endif | |
371 | ||
0f417ce9 PNA |
372 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
373 | ||
4054ff45 | 374 | static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
0f417ce9 PNA |
375 | { |
376 | struct nlattr *nest_parms; | |
377 | ||
378 | if (!(ct->status & IPS_EXPECTED)) | |
379 | return 0; | |
380 | ||
381 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
382 | if (!nest_parms) | |
383 | goto nla_put_failure; | |
384 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
385 | goto nla_put_failure; | |
386 | nla_nest_end(skb, nest_parms); | |
387 | ||
388 | return 0; | |
389 | ||
390 | nla_put_failure: | |
391 | return -1; | |
392 | } | |
393 | ||
bb5cf80e | 394 | static int |
41d73ec0 | 395 | dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type) |
13eae15a | 396 | { |
13eae15a PNA |
397 | struct nlattr *nest_parms; |
398 | ||
399 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
400 | if (!nest_parms) | |
401 | goto nla_put_failure; | |
402 | ||
41d73ec0 PM |
403 | if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS, |
404 | htonl(seq->correction_pos)) || | |
405 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE, | |
406 | htonl(seq->offset_before)) || | |
407 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER, | |
408 | htonl(seq->offset_after))) | |
cc1eb431 | 409 | goto nla_put_failure; |
13eae15a PNA |
410 | |
411 | nla_nest_end(skb, nest_parms); | |
412 | ||
413 | return 0; | |
414 | ||
415 | nla_put_failure: | |
416 | return -1; | |
417 | } | |
418 | ||
64f3967c | 419 | static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, struct nf_conn *ct) |
13eae15a | 420 | { |
41d73ec0 PM |
421 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
422 | struct nf_ct_seqadj *seq; | |
13eae15a | 423 | |
41d73ec0 | 424 | if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj) |
13eae15a PNA |
425 | return 0; |
426 | ||
64f3967c | 427 | spin_lock_bh(&ct->lock); |
41d73ec0 PM |
428 | seq = &seqadj->seq[IP_CT_DIR_ORIGINAL]; |
429 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1) | |
64f3967c | 430 | goto err; |
13eae15a | 431 | |
41d73ec0 PM |
432 | seq = &seqadj->seq[IP_CT_DIR_REPLY]; |
433 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1) | |
64f3967c | 434 | goto err; |
13eae15a | 435 | |
64f3967c | 436 | spin_unlock_bh(&ct->lock); |
13eae15a | 437 | return 0; |
64f3967c LZ |
438 | err: |
439 | spin_unlock_bh(&ct->lock); | |
440 | return -1; | |
13eae15a | 441 | } |
13eae15a | 442 | |
20710b3b PNA |
443 | static int ctnetlink_dump_ct_synproxy(struct sk_buff *skb, struct nf_conn *ct) |
444 | { | |
445 | struct nf_conn_synproxy *synproxy = nfct_synproxy(ct); | |
446 | struct nlattr *nest_parms; | |
447 | ||
448 | if (!synproxy) | |
449 | return 0; | |
450 | ||
451 | nest_parms = nla_nest_start(skb, CTA_SYNPROXY | NLA_F_NESTED); | |
452 | if (!nest_parms) | |
453 | goto nla_put_failure; | |
454 | ||
455 | if (nla_put_be32(skb, CTA_SYNPROXY_ISN, htonl(synproxy->isn)) || | |
456 | nla_put_be32(skb, CTA_SYNPROXY_ITS, htonl(synproxy->its)) || | |
457 | nla_put_be32(skb, CTA_SYNPROXY_TSOFF, htonl(synproxy->tsoff))) | |
458 | goto nla_put_failure; | |
459 | ||
460 | nla_nest_end(skb, nest_parms); | |
461 | ||
462 | return 0; | |
463 | ||
464 | nla_put_failure: | |
465 | return -1; | |
466 | } | |
467 | ||
4054ff45 | 468 | static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 469 | { |
cc1eb431 DM |
470 | if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct))) |
471 | goto nla_put_failure; | |
c1d10adb PNA |
472 | return 0; |
473 | ||
df6fb868 | 474 | nla_put_failure: |
c1d10adb PNA |
475 | return -1; |
476 | } | |
477 | ||
4054ff45 | 478 | static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 479 | { |
cc1eb431 DM |
480 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
481 | goto nla_put_failure; | |
c1d10adb PNA |
482 | return 0; |
483 | ||
df6fb868 | 484 | nla_put_failure: |
c1d10adb PNA |
485 | return -1; |
486 | } | |
487 | ||
c1d10adb | 488 | static int |
15e47304 | 489 | ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
80e60e67 | 490 | struct nf_conn *ct) |
c1d10adb | 491 | { |
308ac914 | 492 | const struct nf_conntrack_zone *zone; |
c1d10adb PNA |
493 | struct nlmsghdr *nlh; |
494 | struct nfgenmsg *nfmsg; | |
df6fb868 | 495 | struct nlattr *nest_parms; |
15e47304 | 496 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
c1d10adb | 497 | |
dedb67c4 | 498 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW); |
15e47304 | 499 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
500 | if (nlh == NULL) |
501 | goto nlmsg_failure; | |
c1d10adb | 502 | |
96bcf938 | 503 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 504 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
505 | nfmsg->version = NFNETLINK_V0; |
506 | nfmsg->res_id = 0; | |
507 | ||
deedb590 DB |
508 | zone = nf_ct_zone(ct); |
509 | ||
df6fb868 PM |
510 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
511 | if (!nest_parms) | |
512 | goto nla_put_failure; | |
f2f3e38c | 513 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 | 514 | goto nla_put_failure; |
deedb590 DB |
515 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
516 | NF_CT_ZONE_DIR_ORIG) < 0) | |
517 | goto nla_put_failure; | |
df6fb868 | 518 | nla_nest_end(skb, nest_parms); |
601e68e1 | 519 | |
df6fb868 PM |
520 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
521 | if (!nest_parms) | |
522 | goto nla_put_failure; | |
f2f3e38c | 523 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 | 524 | goto nla_put_failure; |
deedb590 DB |
525 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
526 | NF_CT_ZONE_DIR_REPL) < 0) | |
527 | goto nla_put_failure; | |
df6fb868 | 528 | nla_nest_end(skb, nest_parms); |
c1d10adb | 529 | |
deedb590 DB |
530 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
531 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
cc1eb431 | 532 | goto nla_put_failure; |
ef00f89f | 533 | |
c1d10adb PNA |
534 | if (ctnetlink_dump_status(skb, ct) < 0 || |
535 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
4542fa47 | 536 | ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 537 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
c1d10adb PNA |
538 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
539 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
540 | ctnetlink_dump_mark(skb, ct) < 0 || | |
1cc63249 | 541 | ctnetlink_dump_secctx(skb, ct) < 0 || |
0ceabd83 | 542 | ctnetlink_dump_labels(skb, ct) < 0 || |
c1d10adb | 543 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 544 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 545 | ctnetlink_dump_master(skb, ct) < 0 || |
20710b3b PNA |
546 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0 || |
547 | ctnetlink_dump_ct_synproxy(skb, ct) < 0) | |
df6fb868 | 548 | goto nla_put_failure; |
c1d10adb | 549 | |
96bcf938 | 550 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
551 | return skb->len; |
552 | ||
553 | nlmsg_failure: | |
df6fb868 | 554 | nla_put_failure: |
96bcf938 | 555 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
556 | return -1; |
557 | } | |
558 | ||
8252fcea | 559 | #if defined(CONFIG_NETFILTER_NETLINK_GLUE_CT) || defined(CONFIG_NF_CONNTRACK_EVENTS) |
5caaed15 | 560 | static size_t ctnetlink_proto_size(const struct nf_conn *ct) |
2732c4e4 | 561 | { |
b3480fe0 FW |
562 | const struct nf_conntrack_l3proto *l3proto; |
563 | const struct nf_conntrack_l4proto *l4proto; | |
5caaed15 | 564 | size_t len, len4 = 0; |
03b64f51 | 565 | |
03b64f51 | 566 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
0d035100 FW |
567 | len = l3proto->nla_size; |
568 | len *= 3u; /* ORIG, REPLY, MASTER */ | |
03b64f51 PNA |
569 | |
570 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
39215846 | 571 | len += l4proto->nlattr_size; |
5caaed15 FW |
572 | if (l4proto->nlattr_tuple_size) { |
573 | len4 = l4proto->nlattr_tuple_size(); | |
574 | len4 *= 3u; /* ORIG, REPLY, MASTER */ | |
575 | } | |
03b64f51 | 576 | |
5caaed15 | 577 | return len + len4; |
03b64f51 | 578 | } |
8252fcea | 579 | #endif |
03b64f51 | 580 | |
4a96300c | 581 | static inline size_t ctnetlink_acct_size(const struct nf_conn *ct) |
d26e6a02 JP |
582 | { |
583 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) | |
584 | return 0; | |
585 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ | |
b46f6ded ND |
586 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
587 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
d26e6a02 JP |
588 | ; |
589 | } | |
590 | ||
4a96300c | 591 | static inline int ctnetlink_secctx_size(const struct nf_conn *ct) |
1cc63249 | 592 | { |
cba85b53 PNA |
593 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
594 | int len, ret; | |
1cc63249 | 595 | |
cba85b53 PNA |
596 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
597 | if (ret) | |
598 | return 0; | |
1cc63249 | 599 | |
cba85b53 PNA |
600 | return nla_total_size(0) /* CTA_SECCTX */ |
601 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ | |
602 | #else | |
603 | return 0; | |
1cc63249 | 604 | #endif |
cba85b53 | 605 | } |
1cc63249 | 606 | |
4a96300c | 607 | static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct) |
a992ca2a PNA |
608 | { |
609 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
610 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) | |
611 | return 0; | |
b46f6ded | 612 | return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t)); |
a992ca2a PNA |
613 | #else |
614 | return 0; | |
615 | #endif | |
616 | } | |
617 | ||
4054ff45 PNA |
618 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
619 | static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
03b64f51 PNA |
620 | { |
621 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
622 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
623 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
624 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
625 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
626 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
627 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
f7b13e43 | 628 | + ctnetlink_acct_size(ct) |
a992ca2a | 629 | + ctnetlink_timestamp_size(ct) |
03b64f51 PNA |
630 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
631 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
632 | + nla_total_size(0) /* CTA_HELP */ | |
633 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
cba85b53 | 634 | + ctnetlink_secctx_size(ct) |
d271e8bd | 635 | #ifdef CONFIG_NF_NAT_NEEDED |
03b64f51 PNA |
636 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
637 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
638 | #endif |
639 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 640 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
4a001068 KM |
641 | #endif |
642 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
deedb590 | 643 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
d271e8bd | 644 | #endif |
03b64f51 | 645 | + ctnetlink_proto_size(ct) |
0ceabd83 | 646 | + ctnetlink_label_size(ct) |
03b64f51 | 647 | ; |
2732c4e4 HE |
648 | } |
649 | ||
e34d5c1a PNA |
650 | static int |
651 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb | 652 | { |
308ac914 | 653 | const struct nf_conntrack_zone *zone; |
9592a5c0 | 654 | struct net *net; |
c1d10adb PNA |
655 | struct nlmsghdr *nlh; |
656 | struct nfgenmsg *nfmsg; | |
df6fb868 | 657 | struct nlattr *nest_parms; |
19abb7b0 | 658 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
659 | struct sk_buff *skb; |
660 | unsigned int type; | |
c1d10adb | 661 | unsigned int flags = 0, group; |
dd7669a9 | 662 | int err; |
c1d10adb | 663 | |
a0891aa6 | 664 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
665 | type = IPCTNL_MSG_CT_DELETE; |
666 | group = NFNLGRP_CONNTRACK_DESTROY; | |
04b80cea | 667 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
668 | type = IPCTNL_MSG_CT_NEW; |
669 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 670 | group = NFNLGRP_CONNTRACK_NEW; |
04b80cea | 671 | } else if (events) { |
c1d10adb PNA |
672 | type = IPCTNL_MSG_CT_NEW; |
673 | group = NFNLGRP_CONNTRACK_UPDATE; | |
674 | } else | |
e34d5c1a | 675 | return 0; |
a2427692 | 676 | |
9592a5c0 AD |
677 | net = nf_ct_net(ct); |
678 | if (!item->report && !nfnetlink_has_listeners(net, group)) | |
e34d5c1a | 679 | return 0; |
a2427692 | 680 | |
03b64f51 PNA |
681 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
682 | if (skb == NULL) | |
150ace0d | 683 | goto errout; |
c1d10adb | 684 | |
dedb67c4 | 685 | type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type); |
15e47304 | 686 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
687 | if (nlh == NULL) |
688 | goto nlmsg_failure; | |
c1d10adb | 689 | |
96bcf938 | 690 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 691 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
692 | nfmsg->version = NFNETLINK_V0; |
693 | nfmsg->res_id = 0; | |
694 | ||
deedb590 DB |
695 | zone = nf_ct_zone(ct); |
696 | ||
df6fb868 PM |
697 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
698 | if (!nest_parms) | |
699 | goto nla_put_failure; | |
f2f3e38c | 700 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 | 701 | goto nla_put_failure; |
deedb590 DB |
702 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
703 | NF_CT_ZONE_DIR_ORIG) < 0) | |
704 | goto nla_put_failure; | |
df6fb868 | 705 | nla_nest_end(skb, nest_parms); |
601e68e1 | 706 | |
df6fb868 PM |
707 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
708 | if (!nest_parms) | |
709 | goto nla_put_failure; | |
f2f3e38c | 710 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 | 711 | goto nla_put_failure; |
deedb590 DB |
712 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
713 | NF_CT_ZONE_DIR_REPL) < 0) | |
714 | goto nla_put_failure; | |
df6fb868 | 715 | nla_nest_end(skb, nest_parms); |
c1d10adb | 716 | |
deedb590 DB |
717 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
718 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
cc1eb431 | 719 | goto nla_put_failure; |
ef00f89f | 720 | |
1eedf699 EL |
721 | if (ctnetlink_dump_id(skb, ct) < 0) |
722 | goto nla_put_failure; | |
723 | ||
e57dce60 FH |
724 | if (ctnetlink_dump_status(skb, ct) < 0) |
725 | goto nla_put_failure; | |
726 | ||
a0891aa6 | 727 | if (events & (1 << IPCT_DESTROY)) { |
4542fa47 | 728 | if (ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 729 | ctnetlink_dump_timestamp(skb, ct) < 0) |
df6fb868 | 730 | goto nla_put_failure; |
7b621c1e | 731 | } else { |
7b621c1e | 732 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 733 | goto nla_put_failure; |
7b621c1e | 734 | |
a0891aa6 | 735 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 736 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 737 | goto nla_put_failure; |
7b621c1e | 738 | |
a0891aa6 | 739 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 740 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 741 | goto nla_put_failure; |
7b621c1e | 742 | |
ff660c80 | 743 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 744 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
1cc63249 | 745 | && ctnetlink_dump_secctx(skb, ct) < 0) |
37fccd85 | 746 | goto nla_put_failure; |
ff660c80 | 747 | #endif |
0ceabd83 FW |
748 | if (events & (1 << IPCT_LABEL) && |
749 | ctnetlink_dump_labels(skb, ct) < 0) | |
750 | goto nla_put_failure; | |
7b621c1e | 751 | |
a0891aa6 | 752 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
753 | ctnetlink_dump_master(skb, ct) < 0) |
754 | goto nla_put_failure; | |
755 | ||
41d73ec0 PM |
756 | if (events & (1 << IPCT_SEQADJ) && |
757 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) | |
13eae15a | 758 | goto nla_put_failure; |
20710b3b PNA |
759 | |
760 | if (events & (1 << IPCT_SYNPROXY) && | |
761 | ctnetlink_dump_ct_synproxy(skb, ct) < 0) | |
762 | goto nla_put_failure; | |
7b621c1e | 763 | } |
b9a37e0c | 764 | |
a83099a6 | 765 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 766 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
767 | && ctnetlink_dump_mark(skb, ct) < 0) |
768 | goto nla_put_failure; | |
769 | #endif | |
96bcf938 | 770 | nlmsg_end(skb, nlh); |
15e47304 | 771 | err = nfnetlink_send(skb, net, item->portid, group, item->report, |
cd8c20b6 | 772 | GFP_ATOMIC); |
dd7669a9 PNA |
773 | if (err == -ENOBUFS || err == -EAGAIN) |
774 | return -ENOBUFS; | |
775 | ||
e34d5c1a | 776 | return 0; |
c1d10adb | 777 | |
df6fb868 | 778 | nla_put_failure: |
96bcf938 | 779 | nlmsg_cancel(skb, nlh); |
528a3a6f | 780 | nlmsg_failure: |
c1d10adb | 781 | kfree_skb(skb); |
150ace0d | 782 | errout: |
37b7ef72 PNA |
783 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
784 | return -ENOBUFS; | |
785 | ||
e34d5c1a | 786 | return 0; |
c1d10adb PNA |
787 | } |
788 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
789 | ||
790 | static int ctnetlink_done(struct netlink_callback *cb) | |
791 | { | |
89f2e218 PM |
792 | if (cb->args[1]) |
793 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
397304b5 | 794 | kfree(cb->data); |
c1d10adb PNA |
795 | return 0; |
796 | } | |
797 | ||
866476f3 | 798 | struct ctnetlink_filter { |
0f298a28 PNA |
799 | struct { |
800 | u_int32_t val; | |
801 | u_int32_t mask; | |
802 | } mark; | |
803 | }; | |
804 | ||
866476f3 KE |
805 | static struct ctnetlink_filter * |
806 | ctnetlink_alloc_filter(const struct nlattr * const cda[]) | |
807 | { | |
808 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
809 | struct ctnetlink_filter *filter; | |
810 | ||
811 | filter = kzalloc(sizeof(*filter), GFP_KERNEL); | |
812 | if (filter == NULL) | |
813 | return ERR_PTR(-ENOMEM); | |
814 | ||
815 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); | |
816 | filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
817 | ||
818 | return filter; | |
819 | #else | |
820 | return ERR_PTR(-EOPNOTSUPP); | |
821 | #endif | |
822 | } | |
823 | ||
824 | static int ctnetlink_filter_match(struct nf_conn *ct, void *data) | |
825 | { | |
826 | struct ctnetlink_filter *filter = data; | |
827 | ||
828 | if (filter == NULL) | |
829 | return 1; | |
830 | ||
831 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
832 | if ((ct->mark & filter->mark.mask) == filter->mark.val) | |
833 | return 1; | |
834 | #endif | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
c1d10adb PNA |
839 | static int |
840 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
841 | { | |
9592a5c0 | 842 | struct net *net = sock_net(skb->sk); |
89f2e218 | 843 | struct nf_conn *ct, *last; |
c1d10adb | 844 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 845 | struct hlist_nulls_node *n; |
96bcf938 | 846 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 847 | u_int8_t l3proto = nfmsg->nfgen_family; |
2344d64e FW |
848 | struct nf_conn *nf_ct_evict[8]; |
849 | int res, i; | |
93bb0ceb JDB |
850 | spinlock_t *lockp; |
851 | ||
d205dc40 | 852 | last = (struct nf_conn *)cb->args[1]; |
2344d64e | 853 | i = 0; |
93bb0ceb JDB |
854 | |
855 | local_bh_disable(); | |
56d52d48 | 856 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
89f2e218 | 857 | restart: |
2344d64e FW |
858 | while (i) { |
859 | i--; | |
860 | if (nf_ct_should_gc(nf_ct_evict[i])) | |
861 | nf_ct_kill(nf_ct_evict[i]); | |
862 | nf_ct_put(nf_ct_evict[i]); | |
863 | } | |
864 | ||
93bb0ceb | 865 | lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS]; |
b16c2919 | 866 | nf_conntrack_lock(lockp); |
56d52d48 | 867 | if (cb->args[0] >= nf_conntrack_htable_size) { |
93bb0ceb JDB |
868 | spin_unlock(lockp); |
869 | goto out; | |
870 | } | |
56d52d48 FW |
871 | hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]], |
872 | hnnode) { | |
5b1158e9 | 873 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
874 | continue; |
875 | ct = nf_ct_tuplehash_to_ctrack(h); | |
2344d64e FW |
876 | if (nf_ct_is_expired(ct)) { |
877 | if (i < ARRAY_SIZE(nf_ct_evict) && | |
878 | atomic_inc_not_zero(&ct->ct_general.use)) | |
879 | nf_ct_evict[i++] = ct; | |
880 | continue; | |
881 | } | |
882 | ||
e0c7d472 FW |
883 | if (!net_eq(net, nf_ct_net(ct))) |
884 | continue; | |
885 | ||
87711cb8 PNA |
886 | /* Dump entries of a given L3 protocol number. |
887 | * If it is not specified, ie. l3proto == 0, | |
888 | * then dump everything. */ | |
5e8fbe2a | 889 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
13ee6ac5 | 890 | continue; |
d205dc40 PM |
891 | if (cb->args[1]) { |
892 | if (ct != last) | |
13ee6ac5 | 893 | continue; |
d205dc40 | 894 | cb->args[1] = 0; |
89f2e218 | 895 | } |
866476f3 | 896 | if (!ctnetlink_filter_match(ct, cb->data)) |
0f298a28 | 897 | continue; |
866476f3 | 898 | |
3b988ece HS |
899 | rcu_read_lock(); |
900 | res = | |
15e47304 | 901 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
3b988ece HS |
902 | cb->nlh->nlmsg_seq, |
903 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
904 | ct); | |
905 | rcu_read_unlock(); | |
906 | if (res < 0) { | |
c71caf41 | 907 | nf_conntrack_get(&ct->ct_general); |
89f2e218 | 908 | cb->args[1] = (unsigned long)ct; |
93bb0ceb | 909 | spin_unlock(lockp); |
c1d10adb | 910 | goto out; |
89f2e218 PM |
911 | } |
912 | } | |
93bb0ceb | 913 | spin_unlock(lockp); |
d205dc40 | 914 | if (cb->args[1]) { |
89f2e218 PM |
915 | cb->args[1] = 0; |
916 | goto restart; | |
c1d10adb PNA |
917 | } |
918 | } | |
89f2e218 | 919 | out: |
93bb0ceb | 920 | local_bh_enable(); |
fefa9267 LZ |
921 | if (last) { |
922 | /* nf ct hash resize happened, now clear the leftover. */ | |
923 | if ((struct nf_conn *)cb->args[1] == last) | |
924 | cb->args[1] = 0; | |
925 | ||
d205dc40 | 926 | nf_ct_put(last); |
fefa9267 | 927 | } |
c1d10adb | 928 | |
2344d64e FW |
929 | while (i) { |
930 | i--; | |
931 | if (nf_ct_should_gc(nf_ct_evict[i])) | |
932 | nf_ct_kill(nf_ct_evict[i]); | |
933 | nf_ct_put(nf_ct_evict[i]); | |
934 | } | |
935 | ||
c1d10adb PNA |
936 | return skb->len; |
937 | } | |
938 | ||
4054ff45 PNA |
939 | static int ctnetlink_parse_tuple_ip(struct nlattr *attr, |
940 | struct nf_conntrack_tuple *tuple) | |
c1d10adb | 941 | { |
df6fb868 | 942 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
943 | struct nf_conntrack_l3proto *l3proto; |
944 | int ret = 0; | |
945 | ||
fceb6435 | 946 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL, NULL); |
130ffbc2 DB |
947 | if (ret < 0) |
948 | return ret; | |
c1d10adb | 949 | |
cd91566e FW |
950 | rcu_read_lock(); |
951 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 952 | |
f73e924c PM |
953 | if (likely(l3proto->nlattr_to_tuple)) { |
954 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
fceb6435 | 955 | l3proto->nla_policy, NULL); |
f73e924c PM |
956 | if (ret == 0) |
957 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
958 | } | |
c1d10adb | 959 | |
cd91566e | 960 | rcu_read_unlock(); |
c1d10adb | 961 | |
c1d10adb PNA |
962 | return ret; |
963 | } | |
964 | ||
f73e924c PM |
965 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
966 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
967 | }; |
968 | ||
4054ff45 PNA |
969 | static int ctnetlink_parse_tuple_proto(struct nlattr *attr, |
970 | struct nf_conntrack_tuple *tuple) | |
c1d10adb | 971 | { |
b3480fe0 | 972 | const struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 973 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
c1d10adb PNA |
974 | int ret = 0; |
975 | ||
fceb6435 JB |
976 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy, |
977 | NULL); | |
f73e924c PM |
978 | if (ret < 0) |
979 | return ret; | |
c1d10adb | 980 | |
df6fb868 | 981 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 982 | return -EINVAL; |
77236b6e | 983 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 984 | |
cd91566e FW |
985 | rcu_read_lock(); |
986 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 987 | |
f73e924c PM |
988 | if (likely(l4proto->nlattr_to_tuple)) { |
989 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
fceb6435 | 990 | l4proto->nla_policy, NULL); |
f73e924c PM |
991 | if (ret == 0) |
992 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
993 | } | |
c1d10adb | 994 | |
cd91566e | 995 | rcu_read_unlock(); |
601e68e1 | 996 | |
c1d10adb PNA |
997 | return ret; |
998 | } | |
999 | ||
deedb590 DB |
1000 | static int |
1001 | ctnetlink_parse_zone(const struct nlattr *attr, | |
1002 | struct nf_conntrack_zone *zone) | |
1003 | { | |
5e8018fc DB |
1004 | nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID, |
1005 | NF_CT_DEFAULT_ZONE_DIR, 0); | |
deedb590 DB |
1006 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
1007 | if (attr) | |
1008 | zone->id = ntohs(nla_get_be16(attr)); | |
1009 | #else | |
1010 | if (attr) | |
1011 | return -EOPNOTSUPP; | |
1012 | #endif | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static int | |
1017 | ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type, | |
1018 | struct nf_conntrack_zone *zone) | |
1019 | { | |
1020 | int ret; | |
1021 | ||
1022 | if (zone->id != NF_CT_DEFAULT_ZONE_ID) | |
1023 | return -EINVAL; | |
1024 | ||
1025 | ret = ctnetlink_parse_zone(attr, zone); | |
1026 | if (ret < 0) | |
1027 | return ret; | |
1028 | ||
1029 | if (type == CTA_TUPLE_REPLY) | |
1030 | zone->dir = NF_CT_ZONE_DIR_REPL; | |
1031 | else | |
1032 | zone->dir = NF_CT_ZONE_DIR_ORIG; | |
1033 | ||
1034 | return 0; | |
1035 | } | |
1036 | ||
d0b0268f PM |
1037 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
1038 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
1039 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
deedb590 | 1040 | [CTA_TUPLE_ZONE] = { .type = NLA_U16 }, |
d0b0268f PM |
1041 | }; |
1042 | ||
bb5cf80e | 1043 | static int |
39938324 | 1044 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
a2b7cbdd MK |
1045 | struct nf_conntrack_tuple *tuple, u32 type, |
1046 | u_int8_t l3num, struct nf_conntrack_zone *zone) | |
c1d10adb | 1047 | { |
df6fb868 | 1048 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
1049 | int err; |
1050 | ||
c1d10adb PNA |
1051 | memset(tuple, 0, sizeof(*tuple)); |
1052 | ||
fceb6435 JB |
1053 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy, |
1054 | NULL); | |
130ffbc2 DB |
1055 | if (err < 0) |
1056 | return err; | |
c1d10adb | 1057 | |
df6fb868 | 1058 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
1059 | return -EINVAL; |
1060 | ||
1061 | tuple->src.l3num = l3num; | |
1062 | ||
df6fb868 | 1063 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
1064 | if (err < 0) |
1065 | return err; | |
1066 | ||
df6fb868 | 1067 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
1068 | return -EINVAL; |
1069 | ||
df6fb868 | 1070 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
1071 | if (err < 0) |
1072 | return err; | |
1073 | ||
deedb590 DB |
1074 | if (tb[CTA_TUPLE_ZONE]) { |
1075 | if (!zone) | |
1076 | return -EINVAL; | |
1077 | ||
1078 | err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE], | |
1079 | type, zone); | |
1080 | if (err < 0) | |
1081 | return err; | |
1082 | } | |
1083 | ||
c1d10adb PNA |
1084 | /* orig and expect tuples get DIR_ORIGINAL */ |
1085 | if (type == CTA_TUPLE_REPLY) | |
1086 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
1087 | else | |
1088 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
1089 | ||
c1d10adb PNA |
1090 | return 0; |
1091 | } | |
1092 | ||
d0b0268f | 1093 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
6d1fafca FW |
1094 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
1095 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
d0b0268f PM |
1096 | }; |
1097 | ||
4054ff45 PNA |
1098 | static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
1099 | struct nlattr **helpinfo) | |
c1d10adb | 1100 | { |
130ffbc2 | 1101 | int err; |
df6fb868 | 1102 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 1103 | |
fceb6435 | 1104 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy, NULL); |
130ffbc2 DB |
1105 | if (err < 0) |
1106 | return err; | |
c1d10adb | 1107 | |
df6fb868 | 1108 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
1109 | return -EINVAL; |
1110 | ||
df6fb868 | 1111 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb | 1112 | |
ae243bee PNA |
1113 | if (tb[CTA_HELP_INFO]) |
1114 | *helpinfo = tb[CTA_HELP_INFO]; | |
1115 | ||
c1d10adb PNA |
1116 | return 0; |
1117 | } | |
1118 | ||
f73e924c | 1119 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
1120 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
1121 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 1122 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
1123 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
1124 | [CTA_HELP] = { .type = NLA_NESTED }, | |
1125 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
1126 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
1127 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 1128 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
1129 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
1130 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
6d1fafca FW |
1131 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
1132 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, | |
ef00f89f | 1133 | [CTA_ZONE] = { .type = NLA_U16 }, |
0f298a28 | 1134 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
9b21f6a9 | 1135 | [CTA_LABELS] = { .type = NLA_BINARY, |
d2bf2f34 | 1136 | .len = NF_CT_LABELS_MAX_SIZE }, |
9b21f6a9 | 1137 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, |
d2bf2f34 | 1138 | .len = NF_CT_LABELS_MAX_SIZE }, |
c1d10adb PNA |
1139 | }; |
1140 | ||
90964016 PNA |
1141 | static int ctnetlink_flush_iterate(struct nf_conn *ct, void *data) |
1142 | { | |
1143 | if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) | |
1144 | return 0; | |
1145 | ||
1146 | return ctnetlink_filter_match(ct, data); | |
1147 | } | |
1148 | ||
866476f3 KE |
1149 | static int ctnetlink_flush_conntrack(struct net *net, |
1150 | const struct nlattr * const cda[], | |
1151 | u32 portid, int report) | |
1152 | { | |
1153 | struct ctnetlink_filter *filter = NULL; | |
1154 | ||
1155 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { | |
1156 | filter = ctnetlink_alloc_filter(cda); | |
1157 | if (IS_ERR(filter)) | |
1158 | return PTR_ERR(filter); | |
1159 | } | |
1160 | ||
90964016 | 1161 | nf_ct_iterate_cleanup_net(net, ctnetlink_flush_iterate, filter, |
9fd6452d | 1162 | portid, report); |
866476f3 KE |
1163 | kfree(filter); |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | ||
7b8002a1 PNA |
1168 | static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl, |
1169 | struct sk_buff *skb, | |
1170 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1171 | const struct nlattr * const cda[], |
1172 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
1173 | { |
1174 | struct nf_conntrack_tuple_hash *h; | |
1175 | struct nf_conntrack_tuple tuple; | |
1176 | struct nf_conn *ct; | |
96bcf938 | 1177 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1178 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 1179 | struct nf_conntrack_zone zone; |
ef00f89f PM |
1180 | int err; |
1181 | ||
1182 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1183 | if (err < 0) | |
1184 | return err; | |
c1d10adb | 1185 | |
df6fb868 | 1186 | if (cda[CTA_TUPLE_ORIG]) |
deedb590 DB |
1187 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
1188 | u3, &zone); | |
df6fb868 | 1189 | else if (cda[CTA_TUPLE_REPLY]) |
deedb590 DB |
1190 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
1191 | u3, &zone); | |
c1d10adb | 1192 | else { |
866476f3 KE |
1193 | return ctnetlink_flush_conntrack(net, cda, |
1194 | NETLINK_CB(skb).portid, | |
1195 | nlmsg_report(nlh)); | |
c1d10adb PNA |
1196 | } |
1197 | ||
1198 | if (err < 0) | |
1199 | return err; | |
1200 | ||
308ac914 | 1201 | h = nf_conntrack_find_get(net, &zone, &tuple); |
9ea8cfd6 | 1202 | if (!h) |
c1d10adb | 1203 | return -ENOENT; |
c1d10adb PNA |
1204 | |
1205 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 1206 | |
90964016 PNA |
1207 | if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) { |
1208 | nf_ct_put(ct); | |
1209 | return -EBUSY; | |
1210 | } | |
1211 | ||
df6fb868 | 1212 | if (cda[CTA_ID]) { |
77236b6e | 1213 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 1214 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
1215 | nf_ct_put(ct); |
1216 | return -ENOENT; | |
1217 | } | |
601e68e1 | 1218 | } |
c1d10adb | 1219 | |
f330a7fd | 1220 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); |
c1d10adb | 1221 | nf_ct_put(ct); |
c1d10adb PNA |
1222 | |
1223 | return 0; | |
1224 | } | |
1225 | ||
7b8002a1 PNA |
1226 | static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl, |
1227 | struct sk_buff *skb, | |
1228 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1229 | const struct nlattr * const cda[], |
1230 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
1231 | { |
1232 | struct nf_conntrack_tuple_hash *h; | |
1233 | struct nf_conntrack_tuple tuple; | |
1234 | struct nf_conn *ct; | |
1235 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 1236 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1237 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 1238 | struct nf_conntrack_zone zone; |
ef00f89f | 1239 | int err; |
c1d10adb | 1240 | |
80d326fa PNA |
1241 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
1242 | struct netlink_dump_control c = { | |
1243 | .dump = ctnetlink_dump_table, | |
1244 | .done = ctnetlink_done, | |
1245 | }; | |
866476f3 | 1246 | |
0f298a28 | 1247 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
866476f3 | 1248 | struct ctnetlink_filter *filter; |
0f298a28 | 1249 | |
866476f3 KE |
1250 | filter = ctnetlink_alloc_filter(cda); |
1251 | if (IS_ERR(filter)) | |
1252 | return PTR_ERR(filter); | |
0f298a28 | 1253 | |
0f298a28 PNA |
1254 | c.data = filter; |
1255 | } | |
80d326fa PNA |
1256 | return netlink_dump_start(ctnl, skb, nlh, &c); |
1257 | } | |
c1d10adb | 1258 | |
ef00f89f PM |
1259 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
1260 | if (err < 0) | |
1261 | return err; | |
1262 | ||
df6fb868 | 1263 | if (cda[CTA_TUPLE_ORIG]) |
deedb590 DB |
1264 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
1265 | u3, &zone); | |
df6fb868 | 1266 | else if (cda[CTA_TUPLE_REPLY]) |
deedb590 DB |
1267 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
1268 | u3, &zone); | |
c1d10adb PNA |
1269 | else |
1270 | return -EINVAL; | |
1271 | ||
1272 | if (err < 0) | |
1273 | return err; | |
1274 | ||
308ac914 | 1275 | h = nf_conntrack_find_get(net, &zone, &tuple); |
9ea8cfd6 | 1276 | if (!h) |
c1d10adb | 1277 | return -ENOENT; |
9ea8cfd6 | 1278 | |
c1d10adb PNA |
1279 | ct = nf_ct_tuplehash_to_ctrack(h); |
1280 | ||
1281 | err = -ENOMEM; | |
96bcf938 PNA |
1282 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1283 | if (skb2 == NULL) { | |
c1d10adb PNA |
1284 | nf_ct_put(ct); |
1285 | return -ENOMEM; | |
1286 | } | |
c1d10adb | 1287 | |
528a3a6f | 1288 | rcu_read_lock(); |
15e47304 | 1289 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, |
80e60e67 | 1290 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
528a3a6f | 1291 | rcu_read_unlock(); |
c1d10adb PNA |
1292 | nf_ct_put(ct); |
1293 | if (err <= 0) | |
1294 | goto free; | |
1295 | ||
15e47304 | 1296 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
c1d10adb PNA |
1297 | if (err < 0) |
1298 | goto out; | |
1299 | ||
c1d10adb PNA |
1300 | return 0; |
1301 | ||
1302 | free: | |
1303 | kfree_skb(skb2); | |
1304 | out: | |
f31e8d49 PNA |
1305 | /* this avoids a loop in nfnetlink. */ |
1306 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
1307 | } |
1308 | ||
d871befe PNA |
1309 | static int ctnetlink_done_list(struct netlink_callback *cb) |
1310 | { | |
1311 | if (cb->args[1]) | |
1312 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | static int | |
b7779d06 | 1317 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying) |
d871befe | 1318 | { |
cd5f336f | 1319 | struct nf_conn *ct, *last; |
d871befe PNA |
1320 | struct nf_conntrack_tuple_hash *h; |
1321 | struct hlist_nulls_node *n; | |
1322 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
1323 | u_int8_t l3proto = nfmsg->nfgen_family; | |
1324 | int res; | |
b7779d06 JDB |
1325 | int cpu; |
1326 | struct hlist_nulls_head *list; | |
1327 | struct net *net = sock_net(skb->sk); | |
d871befe PNA |
1328 | |
1329 | if (cb->args[2]) | |
1330 | return 0; | |
1331 | ||
cd5f336f FW |
1332 | last = (struct nf_conn *)cb->args[1]; |
1333 | ||
b7779d06 JDB |
1334 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
1335 | struct ct_pcpu *pcpu; | |
1336 | ||
1337 | if (!cpu_possible(cpu)) | |
d871befe | 1338 | continue; |
b7779d06 JDB |
1339 | |
1340 | pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu); | |
1341 | spin_lock_bh(&pcpu->lock); | |
b7779d06 JDB |
1342 | list = dying ? &pcpu->dying : &pcpu->unconfirmed; |
1343 | restart: | |
1344 | hlist_nulls_for_each_entry(h, n, list, hnnode) { | |
1345 | ct = nf_ct_tuplehash_to_ctrack(h); | |
1346 | if (l3proto && nf_ct_l3num(ct) != l3proto) | |
d871befe | 1347 | continue; |
b7779d06 JDB |
1348 | if (cb->args[1]) { |
1349 | if (ct != last) | |
1350 | continue; | |
1351 | cb->args[1] = 0; | |
1352 | } | |
1353 | rcu_read_lock(); | |
1354 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
1355 | cb->nlh->nlmsg_seq, | |
1356 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
1357 | ct); | |
1358 | rcu_read_unlock(); | |
1359 | if (res < 0) { | |
cd5f336f FW |
1360 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
1361 | continue; | |
266155b2 | 1362 | cb->args[0] = cpu; |
b7779d06 JDB |
1363 | cb->args[1] = (unsigned long)ct; |
1364 | spin_unlock_bh(&pcpu->lock); | |
1365 | goto out; | |
1366 | } | |
d871befe | 1367 | } |
b7779d06 JDB |
1368 | if (cb->args[1]) { |
1369 | cb->args[1] = 0; | |
1370 | goto restart; | |
266155b2 | 1371 | } |
b7779d06 | 1372 | spin_unlock_bh(&pcpu->lock); |
d871befe | 1373 | } |
266155b2 | 1374 | cb->args[2] = 1; |
d871befe | 1375 | out: |
d871befe PNA |
1376 | if (last) |
1377 | nf_ct_put(last); | |
1378 | ||
1379 | return skb->len; | |
1380 | } | |
1381 | ||
1382 | static int | |
1383 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) | |
1384 | { | |
b7779d06 | 1385 | return ctnetlink_dump_list(skb, cb, true); |
d871befe PNA |
1386 | } |
1387 | ||
7b8002a1 PNA |
1388 | static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl, |
1389 | struct sk_buff *skb, | |
1390 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1391 | const struct nlattr * const cda[], |
1392 | struct netlink_ext_ack *extack) | |
d871befe PNA |
1393 | { |
1394 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1395 | struct netlink_dump_control c = { | |
1396 | .dump = ctnetlink_dump_dying, | |
1397 | .done = ctnetlink_done_list, | |
1398 | }; | |
1399 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1400 | } | |
1401 | ||
1402 | return -EOPNOTSUPP; | |
1403 | } | |
1404 | ||
1405 | static int | |
1406 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) | |
1407 | { | |
b7779d06 | 1408 | return ctnetlink_dump_list(skb, cb, false); |
d871befe PNA |
1409 | } |
1410 | ||
7b8002a1 PNA |
1411 | static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl, |
1412 | struct sk_buff *skb, | |
1413 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1414 | const struct nlattr * const cda[], |
1415 | struct netlink_ext_ack *extack) | |
d871befe PNA |
1416 | { |
1417 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1418 | struct netlink_dump_control c = { | |
1419 | .dump = ctnetlink_dump_unconfirmed, | |
1420 | .done = ctnetlink_done_list, | |
1421 | }; | |
1422 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1423 | } | |
1424 | ||
1425 | return -EOPNOTSUPP; | |
1426 | } | |
1427 | ||
67671841 | 1428 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
1429 | static int |
1430 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
1431 | enum nf_nat_manip_type manip, | |
39938324 | 1432 | const struct nlattr *attr) |
e6a7d3c0 PNA |
1433 | { |
1434 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
c7232c99 | 1435 | int err; |
e6a7d3c0 PNA |
1436 | |
1437 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
1438 | if (!parse_nat_setup) { | |
95a5afca | 1439 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 1440 | rcu_read_unlock(); |
c14b78e7 | 1441 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1442 | if (request_module("nf-nat") < 0) { |
c14b78e7 | 1443 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1444 | rcu_read_lock(); |
1445 | return -EOPNOTSUPP; | |
1446 | } | |
c14b78e7 | 1447 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1448 | rcu_read_lock(); |
1449 | if (nfnetlink_parse_nat_setup_hook) | |
1450 | return -EAGAIN; | |
1451 | #endif | |
1452 | return -EOPNOTSUPP; | |
1453 | } | |
1454 | ||
c7232c99 PM |
1455 | err = parse_nat_setup(ct, manip, attr); |
1456 | if (err == -EAGAIN) { | |
1457 | #ifdef CONFIG_MODULES | |
1458 | rcu_read_unlock(); | |
c14b78e7 | 1459 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1460 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
c14b78e7 | 1461 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1462 | rcu_read_lock(); |
1463 | return -EOPNOTSUPP; | |
1464 | } | |
c14b78e7 | 1465 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1466 | rcu_read_lock(); |
1467 | #else | |
1468 | err = -EOPNOTSUPP; | |
1469 | #endif | |
1470 | } | |
1471 | return err; | |
e6a7d3c0 | 1472 | } |
67671841 | 1473 | #endif |
e6a7d3c0 | 1474 | |
53b56da8 LZ |
1475 | static void |
1476 | __ctnetlink_change_status(struct nf_conn *ct, unsigned long on, | |
1477 | unsigned long off) | |
1478 | { | |
1479 | unsigned int bit; | |
1480 | ||
1481 | /* Ignore these unchangable bits */ | |
1482 | on &= ~IPS_UNCHANGEABLE_MASK; | |
1483 | off &= ~IPS_UNCHANGEABLE_MASK; | |
1484 | ||
1485 | for (bit = 0; bit < __IPS_MAX_BIT; bit++) { | |
1486 | if (on & (1 << bit)) | |
1487 | set_bit(bit, &ct->status); | |
1488 | else if (off & (1 << bit)) | |
1489 | clear_bit(bit, &ct->status); | |
1490 | } | |
1491 | } | |
1492 | ||
bb5cf80e | 1493 | static int |
39938324 | 1494 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1495 | { |
1496 | unsigned long d; | |
77236b6e | 1497 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
1498 | d = ct->status ^ status; |
1499 | ||
1500 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
1501 | /* unchangeable */ | |
0adf9d67 | 1502 | return -EBUSY; |
601e68e1 | 1503 | |
c1d10adb PNA |
1504 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
1505 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 1506 | return -EBUSY; |
601e68e1 | 1507 | |
c1d10adb PNA |
1508 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
1509 | /* ASSURED bit can only be set */ | |
0adf9d67 | 1510 | return -EBUSY; |
c1d10adb | 1511 | |
53b56da8 | 1512 | __ctnetlink_change_status(ct, status, 0); |
c1d10adb PNA |
1513 | return 0; |
1514 | } | |
1515 | ||
e6a7d3c0 | 1516 | static int |
0eba801b | 1517 | ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1518 | { |
1519 | #ifdef CONFIG_NF_NAT_NEEDED | |
1520 | int ret; | |
1521 | ||
fe337ac2 FW |
1522 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
1523 | return 0; | |
1524 | ||
0eba801b PNA |
1525 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST, |
1526 | cda[CTA_NAT_DST]); | |
1527 | if (ret < 0) | |
1528 | return ret; | |
1529 | ||
c47d36b3 AS |
1530 | return ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC, |
1531 | cda[CTA_NAT_SRC]); | |
e6a7d3c0 | 1532 | #else |
0eba801b PNA |
1533 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
1534 | return 0; | |
e6a7d3c0 PNA |
1535 | return -EOPNOTSUPP; |
1536 | #endif | |
1537 | } | |
c1d10adb | 1538 | |
4054ff45 PNA |
1539 | static int ctnetlink_change_helper(struct nf_conn *ct, |
1540 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1541 | { |
1542 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1543 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1544 | char *helpname = NULL; |
ae243bee | 1545 | struct nlattr *helpinfo = NULL; |
c1d10adb PNA |
1546 | int err; |
1547 | ||
ae243bee | 1548 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
c1d10adb PNA |
1549 | if (err < 0) |
1550 | return err; | |
1551 | ||
f95d7a46 KC |
1552 | /* don't change helper of sibling connections */ |
1553 | if (ct->master) { | |
1554 | /* If we try to change the helper to the same thing twice, | |
1555 | * treat the second attempt as a no-op instead of returning | |
1556 | * an error. | |
1557 | */ | |
3173d5b8 LZ |
1558 | err = -EBUSY; |
1559 | if (help) { | |
1560 | rcu_read_lock(); | |
1561 | helper = rcu_dereference(help->helper); | |
1562 | if (helper && !strcmp(helper->name, helpname)) | |
1563 | err = 0; | |
1564 | rcu_read_unlock(); | |
1565 | } | |
1566 | ||
1567 | return err; | |
f95d7a46 KC |
1568 | } |
1569 | ||
df293bbb YK |
1570 | if (!strcmp(helpname, "")) { |
1571 | if (help && help->helper) { | |
c1d10adb PNA |
1572 | /* we had a helper before ... */ |
1573 | nf_ct_remove_expectations(ct); | |
a9b3cd7f | 1574 | RCU_INIT_POINTER(help->helper, NULL); |
c1d10adb | 1575 | } |
df293bbb YK |
1576 | |
1577 | return 0; | |
c1d10adb | 1578 | } |
601e68e1 | 1579 | |
88be4c09 | 1580 | rcu_read_lock(); |
794e6871 PM |
1581 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1582 | nf_ct_protonum(ct)); | |
226c0c0e | 1583 | if (helper == NULL) { |
88be4c09 | 1584 | rcu_read_unlock(); |
0adf9d67 | 1585 | return -EOPNOTSUPP; |
226c0c0e | 1586 | } |
df293bbb | 1587 | |
ceceae1b | 1588 | if (help) { |
ae243bee PNA |
1589 | if (help->helper == helper) { |
1590 | /* update private helper data if allowed. */ | |
7be54ca4 | 1591 | if (helper->from_nlattr) |
ae243bee | 1592 | helper->from_nlattr(helpinfo, ct); |
88be4c09 | 1593 | err = 0; |
fd7462de | 1594 | } else |
88be4c09 LZ |
1595 | err = -EBUSY; |
1596 | } else { | |
1597 | /* we cannot set a helper for an existing conntrack */ | |
1598 | err = -EOPNOTSUPP; | |
ceceae1b | 1599 | } |
df293bbb | 1600 | |
88be4c09 LZ |
1601 | rcu_read_unlock(); |
1602 | return err; | |
c1d10adb PNA |
1603 | } |
1604 | ||
4054ff45 PNA |
1605 | static int ctnetlink_change_timeout(struct nf_conn *ct, |
1606 | const struct nlattr * const cda[]) | |
c1d10adb | 1607 | { |
8b1836c4 | 1608 | u64 timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ; |
601e68e1 | 1609 | |
8b1836c4 JE |
1610 | if (timeout > INT_MAX) |
1611 | timeout = INT_MAX; | |
1612 | ct->timeout = nfct_time_stamp + (u32)timeout; | |
c1d10adb | 1613 | |
f330a7fd FW |
1614 | if (test_bit(IPS_DYING_BIT, &ct->status)) |
1615 | return -ETIME; | |
c1d10adb PNA |
1616 | |
1617 | return 0; | |
1618 | } | |
1619 | ||
d0b0268f PM |
1620 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1621 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1622 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1623 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1624 | }; | |
1625 | ||
4054ff45 PNA |
1626 | static int ctnetlink_change_protoinfo(struct nf_conn *ct, |
1627 | const struct nlattr * const cda[]) | |
c1d10adb | 1628 | { |
39938324 | 1629 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
b3480fe0 | 1630 | const struct nf_conntrack_l4proto *l4proto; |
39938324 | 1631 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; |
c1d10adb PNA |
1632 | int err = 0; |
1633 | ||
fceb6435 JB |
1634 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy, |
1635 | NULL); | |
130ffbc2 DB |
1636 | if (err < 0) |
1637 | return err; | |
c1d10adb | 1638 | |
cd91566e FW |
1639 | rcu_read_lock(); |
1640 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1641 | if (l4proto->from_nlattr) |
1642 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1643 | rcu_read_unlock(); |
c1d10adb PNA |
1644 | |
1645 | return err; | |
1646 | } | |
1647 | ||
41d73ec0 PM |
1648 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
1649 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1650 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1651 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
d0b0268f PM |
1652 | }; |
1653 | ||
4054ff45 PNA |
1654 | static int change_seq_adj(struct nf_ct_seqadj *seq, |
1655 | const struct nlattr * const attr) | |
13eae15a | 1656 | { |
130ffbc2 | 1657 | int err; |
41d73ec0 | 1658 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
13eae15a | 1659 | |
fceb6435 | 1660 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy, NULL); |
130ffbc2 DB |
1661 | if (err < 0) |
1662 | return err; | |
13eae15a | 1663 | |
41d73ec0 | 1664 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
13eae15a PNA |
1665 | return -EINVAL; |
1666 | ||
41d73ec0 PM |
1667 | seq->correction_pos = |
1668 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); | |
13eae15a | 1669 | |
41d73ec0 | 1670 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
13eae15a PNA |
1671 | return -EINVAL; |
1672 | ||
41d73ec0 PM |
1673 | seq->offset_before = |
1674 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); | |
13eae15a | 1675 | |
41d73ec0 | 1676 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
13eae15a PNA |
1677 | return -EINVAL; |
1678 | ||
41d73ec0 PM |
1679 | seq->offset_after = |
1680 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); | |
13eae15a PNA |
1681 | |
1682 | return 0; | |
1683 | } | |
1684 | ||
1685 | static int | |
41d73ec0 PM |
1686 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
1687 | const struct nlattr * const cda[]) | |
13eae15a | 1688 | { |
41d73ec0 | 1689 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
13eae15a | 1690 | int ret = 0; |
13eae15a | 1691 | |
41d73ec0 | 1692 | if (!seqadj) |
13eae15a PNA |
1693 | return 0; |
1694 | ||
64f3967c | 1695 | spin_lock_bh(&ct->lock); |
41d73ec0 PM |
1696 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
1697 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], | |
1698 | cda[CTA_SEQ_ADJ_ORIG]); | |
13eae15a | 1699 | if (ret < 0) |
64f3967c | 1700 | goto err; |
13eae15a | 1701 | |
53b56da8 | 1702 | set_bit(IPS_SEQ_ADJUST_BIT, &ct->status); |
13eae15a PNA |
1703 | } |
1704 | ||
41d73ec0 PM |
1705 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
1706 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], | |
1707 | cda[CTA_SEQ_ADJ_REPLY]); | |
13eae15a | 1708 | if (ret < 0) |
64f3967c | 1709 | goto err; |
13eae15a | 1710 | |
53b56da8 | 1711 | set_bit(IPS_SEQ_ADJUST_BIT, &ct->status); |
13eae15a PNA |
1712 | } |
1713 | ||
64f3967c | 1714 | spin_unlock_bh(&ct->lock); |
13eae15a | 1715 | return 0; |
64f3967c LZ |
1716 | err: |
1717 | spin_unlock_bh(&ct->lock); | |
1718 | return ret; | |
13eae15a | 1719 | } |
13eae15a | 1720 | |
20710b3b PNA |
1721 | static const struct nla_policy synproxy_policy[CTA_SYNPROXY_MAX + 1] = { |
1722 | [CTA_SYNPROXY_ISN] = { .type = NLA_U32 }, | |
1723 | [CTA_SYNPROXY_ITS] = { .type = NLA_U32 }, | |
1724 | [CTA_SYNPROXY_TSOFF] = { .type = NLA_U32 }, | |
1725 | }; | |
1726 | ||
1727 | static int ctnetlink_change_synproxy(struct nf_conn *ct, | |
1728 | const struct nlattr * const cda[]) | |
1729 | { | |
1730 | struct nf_conn_synproxy *synproxy = nfct_synproxy(ct); | |
1731 | struct nlattr *tb[CTA_SYNPROXY_MAX + 1]; | |
1732 | int err; | |
1733 | ||
1734 | if (!synproxy) | |
1735 | return 0; | |
1736 | ||
1737 | err = nla_parse_nested(tb, CTA_SYNPROXY_MAX, cda[CTA_SYNPROXY], | |
1738 | synproxy_policy, NULL); | |
1739 | if (err < 0) | |
1740 | return err; | |
1741 | ||
1742 | if (!tb[CTA_SYNPROXY_ISN] || | |
1743 | !tb[CTA_SYNPROXY_ITS] || | |
1744 | !tb[CTA_SYNPROXY_TSOFF]) | |
1745 | return -EINVAL; | |
1746 | ||
1747 | synproxy->isn = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ISN])); | |
1748 | synproxy->its = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ITS])); | |
1749 | synproxy->tsoff = ntohl(nla_get_be32(tb[CTA_SYNPROXY_TSOFF])); | |
1750 | ||
1751 | return 0; | |
1752 | } | |
1753 | ||
9b21f6a9 FW |
1754 | static int |
1755 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) | |
1756 | { | |
1757 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
1758 | size_t len = nla_len(cda[CTA_LABELS]); | |
1759 | const void *mask = cda[CTA_LABELS_MASK]; | |
1760 | ||
1761 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ | |
1762 | return -EINVAL; | |
1763 | ||
1764 | if (mask) { | |
1765 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || | |
1766 | nla_len(cda[CTA_LABELS_MASK]) != len) | |
1767 | return -EINVAL; | |
1768 | mask = nla_data(cda[CTA_LABELS_MASK]); | |
1769 | } | |
1770 | ||
1771 | len /= sizeof(u32); | |
1772 | ||
1773 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); | |
1774 | #else | |
1775 | return -EOPNOTSUPP; | |
1776 | #endif | |
1777 | } | |
1778 | ||
c1d10adb | 1779 | static int |
39938324 PM |
1780 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1781 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1782 | { |
1783 | int err; | |
1784 | ||
e098360f PNA |
1785 | /* only allow NAT changes and master assignation for new conntracks */ |
1786 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1787 | return -EOPNOTSUPP; | |
1788 | ||
df6fb868 | 1789 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1790 | err = ctnetlink_change_helper(ct, cda); |
1791 | if (err < 0) | |
1792 | return err; | |
1793 | } | |
1794 | ||
df6fb868 | 1795 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1796 | err = ctnetlink_change_timeout(ct, cda); |
1797 | if (err < 0) | |
1798 | return err; | |
1799 | } | |
1800 | ||
df6fb868 | 1801 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1802 | err = ctnetlink_change_status(ct, cda); |
1803 | if (err < 0) | |
1804 | return err; | |
1805 | } | |
1806 | ||
df6fb868 | 1807 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1808 | err = ctnetlink_change_protoinfo(ct, cda); |
1809 | if (err < 0) | |
1810 | return err; | |
1811 | } | |
1812 | ||
bcd1e830 | 1813 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1814 | if (cda[CTA_MARK]) |
77236b6e | 1815 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1816 | #endif |
1817 | ||
41d73ec0 PM |
1818 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1819 | err = ctnetlink_change_seq_adj(ct, cda); | |
13eae15a PNA |
1820 | if (err < 0) |
1821 | return err; | |
1822 | } | |
41d73ec0 | 1823 | |
20710b3b PNA |
1824 | if (cda[CTA_SYNPROXY]) { |
1825 | err = ctnetlink_change_synproxy(ct, cda); | |
1826 | if (err < 0) | |
1827 | return err; | |
1828 | } | |
1829 | ||
9b21f6a9 FW |
1830 | if (cda[CTA_LABELS]) { |
1831 | err = ctnetlink_attach_labels(ct, cda); | |
1832 | if (err < 0) | |
1833 | return err; | |
1834 | } | |
13eae15a | 1835 | |
c1d10adb PNA |
1836 | return 0; |
1837 | } | |
1838 | ||
f0a3c086 | 1839 | static struct nf_conn * |
308ac914 DB |
1840 | ctnetlink_create_conntrack(struct net *net, |
1841 | const struct nf_conntrack_zone *zone, | |
9592a5c0 | 1842 | const struct nlattr * const cda[], |
c1d10adb | 1843 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1844 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1845 | u8 u3) |
c1d10adb PNA |
1846 | { |
1847 | struct nf_conn *ct; | |
1848 | int err = -EINVAL; | |
ceceae1b | 1849 | struct nf_conntrack_helper *helper; |
315c34da | 1850 | struct nf_conn_tstamp *tstamp; |
8b1836c4 | 1851 | u64 timeout; |
c1d10adb | 1852 | |
ef00f89f | 1853 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1854 | if (IS_ERR(ct)) |
f0a3c086 | 1855 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1856 | |
df6fb868 | 1857 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1858 | goto err1; |
c1d10adb | 1859 | |
8b1836c4 JE |
1860 | timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ; |
1861 | if (timeout > INT_MAX) | |
1862 | timeout = INT_MAX; | |
1863 | ct->timeout = (u32)timeout + nfct_time_stamp; | |
c1d10adb | 1864 | |
1575e7ea | 1865 | rcu_read_lock(); |
226c0c0e | 1866 | if (cda[CTA_HELP]) { |
29fe1b48 | 1867 | char *helpname = NULL; |
ae243bee PNA |
1868 | struct nlattr *helpinfo = NULL; |
1869 | ||
1870 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); | |
0f5b3e85 PM |
1871 | if (err < 0) |
1872 | goto err2; | |
226c0c0e | 1873 | |
794e6871 PM |
1874 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1875 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1876 | if (helper == NULL) { |
1877 | rcu_read_unlock(); | |
1878 | #ifdef CONFIG_MODULES | |
1879 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1880 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1881 | goto err1; |
226c0c0e PNA |
1882 | } |
1883 | ||
1884 | rcu_read_lock(); | |
794e6871 PM |
1885 | helper = __nf_conntrack_helper_find(helpname, |
1886 | nf_ct_l3num(ct), | |
1887 | nf_ct_protonum(ct)); | |
226c0c0e | 1888 | if (helper) { |
226c0c0e | 1889 | err = -EAGAIN; |
0f5b3e85 | 1890 | goto err2; |
226c0c0e PNA |
1891 | } |
1892 | rcu_read_unlock(); | |
1893 | #endif | |
1894 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1895 | goto err1; |
226c0c0e PNA |
1896 | } else { |
1897 | struct nf_conn_help *help; | |
1898 | ||
1afc5679 | 1899 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
226c0c0e | 1900 | if (help == NULL) { |
226c0c0e | 1901 | err = -ENOMEM; |
0f5b3e85 | 1902 | goto err2; |
226c0c0e | 1903 | } |
ae243bee | 1904 | /* set private helper data if allowed. */ |
7be54ca4 | 1905 | if (helper->from_nlattr) |
ae243bee | 1906 | helper->from_nlattr(helpinfo, ct); |
226c0c0e PNA |
1907 | |
1908 | /* not in hash table yet so not strictly necessary */ | |
a9b3cd7f | 1909 | RCU_INIT_POINTER(help->helper, helper); |
226c0c0e PNA |
1910 | } |
1911 | } else { | |
1912 | /* try an implicit helper assignation */ | |
b2a15a60 | 1913 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1914 | if (err < 0) |
1915 | goto err2; | |
1575e7ea PNA |
1916 | } |
1917 | ||
0eba801b PNA |
1918 | err = ctnetlink_setup_nat(ct, cda); |
1919 | if (err < 0) | |
1920 | goto err2; | |
e6a7d3c0 | 1921 | |
a88e22ad | 1922 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
a992ca2a | 1923 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
a88e22ad | 1924 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
c539f017 | 1925 | nf_ct_labels_ext_add(ct); |
87e94dbc EL |
1926 | nfct_seqadj_ext_add(ct); |
1927 | nfct_synproxy_ext_add(ct); | |
c539f017 | 1928 | |
a88e22ad PNA |
1929 | /* we must add conntrack extensions before confirmation. */ |
1930 | ct->status |= IPS_CONFIRMED; | |
1931 | ||
1932 | if (cda[CTA_STATUS]) { | |
1933 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1934 | if (err < 0) |
1935 | goto err2; | |
bbb3357d | 1936 | } |
c1d10adb | 1937 | |
41d73ec0 PM |
1938 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1939 | err = ctnetlink_change_seq_adj(ct, cda); | |
0f5b3e85 PM |
1940 | if (err < 0) |
1941 | goto err2; | |
c969aa7d | 1942 | } |
c969aa7d | 1943 | |
e5fc9e7a | 1944 | memset(&ct->proto, 0, sizeof(ct->proto)); |
df6fb868 | 1945 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1946 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1947 | if (err < 0) |
1948 | goto err2; | |
c1d10adb PNA |
1949 | } |
1950 | ||
20710b3b PNA |
1951 | if (cda[CTA_SYNPROXY]) { |
1952 | err = ctnetlink_change_synproxy(ct, cda); | |
1953 | if (err < 0) | |
1954 | goto err2; | |
1955 | } | |
1956 | ||
bcd1e830 | 1957 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1958 | if (cda[CTA_MARK]) |
77236b6e | 1959 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1960 | #endif |
1961 | ||
5faa1f4c | 1962 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1963 | if (cda[CTA_TUPLE_MASTER]) { |
1964 | struct nf_conntrack_tuple master; | |
1965 | struct nf_conntrack_tuple_hash *master_h; | |
1966 | struct nf_conn *master_ct; | |
1967 | ||
deedb590 DB |
1968 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, |
1969 | u3, NULL); | |
7ec47496 | 1970 | if (err < 0) |
0f5b3e85 | 1971 | goto err2; |
7ec47496 | 1972 | |
ef00f89f | 1973 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
1974 | if (master_h == NULL) { |
1975 | err = -ENOENT; | |
0f5b3e85 | 1976 | goto err2; |
7ec47496 PNA |
1977 | } |
1978 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1979 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1980 | ct->master = master_ct; |
f2a89004 | 1981 | } |
315c34da PNA |
1982 | tstamp = nf_conn_tstamp_find(ct); |
1983 | if (tstamp) | |
d2de875c | 1984 | tstamp->start = ktime_get_real_ns(); |
5faa1f4c | 1985 | |
7d367e06 JK |
1986 | err = nf_conntrack_hash_check_insert(ct); |
1987 | if (err < 0) | |
1988 | goto err2; | |
1989 | ||
58a3c9bb | 1990 | rcu_read_unlock(); |
dafc741c | 1991 | |
f0a3c086 | 1992 | return ct; |
c1d10adb | 1993 | |
0f5b3e85 PM |
1994 | err2: |
1995 | rcu_read_unlock(); | |
1996 | err1: | |
c1d10adb | 1997 | nf_conntrack_free(ct); |
f0a3c086 | 1998 | return ERR_PTR(err); |
c1d10adb PNA |
1999 | } |
2000 | ||
7b8002a1 PNA |
2001 | static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl, |
2002 | struct sk_buff *skb, | |
2003 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
2004 | const struct nlattr * const cda[], |
2005 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
2006 | { |
2007 | struct nf_conntrack_tuple otuple, rtuple; | |
2008 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 2009 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
7d367e06 | 2010 | struct nf_conn *ct; |
c1d10adb | 2011 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 2012 | struct nf_conntrack_zone zone; |
ef00f89f PM |
2013 | int err; |
2014 | ||
2015 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
2016 | if (err < 0) | |
2017 | return err; | |
c1d10adb | 2018 | |
df6fb868 | 2019 | if (cda[CTA_TUPLE_ORIG]) { |
deedb590 DB |
2020 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, |
2021 | u3, &zone); | |
c1d10adb PNA |
2022 | if (err < 0) |
2023 | return err; | |
2024 | } | |
2025 | ||
df6fb868 | 2026 | if (cda[CTA_TUPLE_REPLY]) { |
deedb590 DB |
2027 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, |
2028 | u3, &zone); | |
c1d10adb PNA |
2029 | if (err < 0) |
2030 | return err; | |
2031 | } | |
2032 | ||
df6fb868 | 2033 | if (cda[CTA_TUPLE_ORIG]) |
308ac914 | 2034 | h = nf_conntrack_find_get(net, &zone, &otuple); |
df6fb868 | 2035 | else if (cda[CTA_TUPLE_REPLY]) |
308ac914 | 2036 | h = nf_conntrack_find_get(net, &zone, &rtuple); |
c1d10adb PNA |
2037 | |
2038 | if (h == NULL) { | |
c1d10adb | 2039 | err = -ENOENT; |
f0a3c086 | 2040 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
fecc1133 | 2041 | enum ip_conntrack_events events; |
5faa1f4c | 2042 | |
442fad94 FW |
2043 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
2044 | return -EINVAL; | |
aa0c2c68 LZ |
2045 | if (otuple.dst.protonum != rtuple.dst.protonum) |
2046 | return -EINVAL; | |
442fad94 | 2047 | |
308ac914 | 2048 | ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple, |
f0a3c086 | 2049 | &rtuple, u3); |
7d367e06 JK |
2050 | if (IS_ERR(ct)) |
2051 | return PTR_ERR(ct); | |
2052 | ||
f0a3c086 | 2053 | err = 0; |
fecc1133 | 2054 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
97aae0df | 2055 | events = 1 << IPCT_RELATED; |
fecc1133 | 2056 | else |
97aae0df | 2057 | events = 1 << IPCT_NEW; |
fecc1133 | 2058 | |
9b21f6a9 FW |
2059 | if (cda[CTA_LABELS] && |
2060 | ctnetlink_attach_labels(ct, cda) == 0) | |
2061 | events |= (1 << IPCT_LABEL); | |
2062 | ||
858b3133 PM |
2063 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
2064 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
2065 | (1 << IPCT_HELPER) | |
2066 | (1 << IPCT_PROTOINFO) | | |
41d73ec0 | 2067 | (1 << IPCT_SEQADJ) | |
20710b3b PNA |
2068 | (1 << IPCT_MARK) | |
2069 | (1 << IPCT_SYNPROXY) | | |
2070 | events, | |
15e47304 | 2071 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 2072 | nlmsg_report(nlh)); |
f0a3c086 | 2073 | nf_ct_put(ct); |
7d367e06 | 2074 | } |
5faa1f4c | 2075 | |
c1d10adb PNA |
2076 | return err; |
2077 | } | |
2078 | /* implicit 'else' */ | |
2079 | ||
c1d10adb | 2080 | err = -EEXIST; |
7d367e06 | 2081 | ct = nf_ct_tuplehash_to_ctrack(h); |
ff4ca827 | 2082 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
2083 | err = ctnetlink_change_conntrack(ct, cda); |
2084 | if (err == 0) { | |
858b3133 PM |
2085 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
2086 | (1 << IPCT_ASSURED) | | |
a0891aa6 | 2087 | (1 << IPCT_HELPER) | |
797a7d66 | 2088 | (1 << IPCT_LABEL) | |
a0891aa6 | 2089 | (1 << IPCT_PROTOINFO) | |
41d73ec0 | 2090 | (1 << IPCT_SEQADJ) | |
20710b3b PNA |
2091 | (1 << IPCT_MARK) | |
2092 | (1 << IPCT_SYNPROXY), | |
15e47304 | 2093 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 2094 | nlmsg_report(nlh)); |
7d367e06 | 2095 | } |
ff4ca827 | 2096 | } |
c1d10adb | 2097 | |
7d367e06 | 2098 | nf_ct_put(ct); |
c1d10adb PNA |
2099 | return err; |
2100 | } | |
2101 | ||
392025f8 | 2102 | static int |
15e47304 | 2103 | ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
392025f8 PNA |
2104 | __u16 cpu, const struct ip_conntrack_stat *st) |
2105 | { | |
2106 | struct nlmsghdr *nlh; | |
2107 | struct nfgenmsg *nfmsg; | |
15e47304 | 2108 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 | 2109 | |
dedb67c4 PNA |
2110 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, |
2111 | IPCTNL_MSG_CT_GET_STATS_CPU); | |
15e47304 | 2112 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
2113 | if (nlh == NULL) |
2114 | goto nlmsg_failure; | |
2115 | ||
2116 | nfmsg = nlmsg_data(nlh); | |
2117 | nfmsg->nfgen_family = AF_UNSPEC; | |
2118 | nfmsg->version = NFNETLINK_V0; | |
2119 | nfmsg->res_id = htons(cpu); | |
2120 | ||
8e8118f8 | 2121 | if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || |
392025f8 PNA |
2122 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || |
2123 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || | |
392025f8 PNA |
2124 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || |
2125 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, | |
2126 | htonl(st->insert_failed)) || | |
2127 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || | |
2128 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || | |
2129 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || | |
2130 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, | |
2131 | htonl(st->search_restart))) | |
2132 | goto nla_put_failure; | |
2133 | ||
2134 | nlmsg_end(skb, nlh); | |
2135 | return skb->len; | |
2136 | ||
2137 | nla_put_failure: | |
2138 | nlmsg_failure: | |
2139 | nlmsg_cancel(skb, nlh); | |
2140 | return -1; | |
2141 | } | |
2142 | ||
2143 | static int | |
2144 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2145 | { | |
2146 | int cpu; | |
2147 | struct net *net = sock_net(skb->sk); | |
2148 | ||
2149 | if (cb->args[0] == nr_cpu_ids) | |
2150 | return 0; | |
2151 | ||
2152 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
2153 | const struct ip_conntrack_stat *st; | |
2154 | ||
2155 | if (!cpu_possible(cpu)) | |
2156 | continue; | |
2157 | ||
2158 | st = per_cpu_ptr(net->ct.stat, cpu); | |
2159 | if (ctnetlink_ct_stat_cpu_fill_info(skb, | |
15e47304 | 2160 | NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
2161 | cb->nlh->nlmsg_seq, |
2162 | cpu, st) < 0) | |
2163 | break; | |
2164 | } | |
2165 | cb->args[0] = cpu; | |
2166 | ||
2167 | return skb->len; | |
2168 | } | |
2169 | ||
7b8002a1 PNA |
2170 | static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl, |
2171 | struct sk_buff *skb, | |
2172 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
2173 | const struct nlattr * const cda[], |
2174 | struct netlink_ext_ack *extack) | |
392025f8 PNA |
2175 | { |
2176 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
2177 | struct netlink_dump_control c = { | |
2178 | .dump = ctnetlink_ct_stat_cpu_dump, | |
2179 | }; | |
2180 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2181 | } | |
2182 | ||
2183 | return 0; | |
2184 | } | |
2185 | ||
2186 | static int | |
15e47304 | 2187 | ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
392025f8 PNA |
2188 | struct net *net) |
2189 | { | |
2190 | struct nlmsghdr *nlh; | |
2191 | struct nfgenmsg *nfmsg; | |
15e47304 | 2192 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
2193 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
2194 | ||
dedb67c4 | 2195 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS); |
15e47304 | 2196 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
2197 | if (nlh == NULL) |
2198 | goto nlmsg_failure; | |
2199 | ||
2200 | nfmsg = nlmsg_data(nlh); | |
2201 | nfmsg->nfgen_family = AF_UNSPEC; | |
2202 | nfmsg->version = NFNETLINK_V0; | |
2203 | nfmsg->res_id = 0; | |
2204 | ||
2205 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) | |
2206 | goto nla_put_failure; | |
2207 | ||
2208 | nlmsg_end(skb, nlh); | |
2209 | return skb->len; | |
2210 | ||
2211 | nla_put_failure: | |
2212 | nlmsg_failure: | |
2213 | nlmsg_cancel(skb, nlh); | |
2214 | return -1; | |
2215 | } | |
2216 | ||
7b8002a1 PNA |
2217 | static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl, |
2218 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2219 | const struct nlattr * const cda[], |
2220 | struct netlink_ext_ack *extack) | |
392025f8 PNA |
2221 | { |
2222 | struct sk_buff *skb2; | |
2223 | int err; | |
2224 | ||
2225 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2226 | if (skb2 == NULL) | |
2227 | return -ENOMEM; | |
2228 | ||
15e47304 | 2229 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
392025f8 PNA |
2230 | nlh->nlmsg_seq, |
2231 | NFNL_MSG_TYPE(nlh->nlmsg_type), | |
2232 | sock_net(skb->sk)); | |
2233 | if (err <= 0) | |
2234 | goto free; | |
2235 | ||
15e47304 | 2236 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
392025f8 PNA |
2237 | if (err < 0) |
2238 | goto out; | |
2239 | ||
2240 | return 0; | |
2241 | ||
2242 | free: | |
2243 | kfree_skb(skb2); | |
2244 | out: | |
2245 | /* this avoids a loop in nfnetlink. */ | |
2246 | return err == -EAGAIN ? -ENOBUFS : err; | |
2247 | } | |
2248 | ||
bd077937 PNA |
2249 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
2250 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, | |
2251 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
2252 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
2253 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
2254 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
2255 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, | |
2256 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
2257 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, | |
2258 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, | |
2259 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, | |
2260 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, | |
2261 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, | |
2262 | }; | |
2263 | ||
2264 | static struct nf_conntrack_expect * | |
2265 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, | |
2266 | struct nf_conntrack_helper *helper, | |
2267 | struct nf_conntrack_tuple *tuple, | |
2268 | struct nf_conntrack_tuple *mask); | |
2269 | ||
83f3e94d | 2270 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
9cb01766 | 2271 | static size_t |
a4b4766c | 2272 | ctnetlink_glue_build_size(const struct nf_conn *ct) |
9cb01766 PNA |
2273 | { |
2274 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
2275 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
2276 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
2277 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
2278 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
2279 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
2280 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ | |
2281 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
2282 | + nla_total_size(0) /* CTA_HELP */ | |
2283 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
2284 | + ctnetlink_secctx_size(ct) | |
2285 | #ifdef CONFIG_NF_NAT_NEEDED | |
2286 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ | |
2287 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
2288 | #endif | |
2289 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2290 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ | |
4a001068 KM |
2291 | #endif |
2292 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
deedb590 | 2293 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
9cb01766 PNA |
2294 | #endif |
2295 | + ctnetlink_proto_size(ct) | |
2296 | ; | |
2297 | } | |
2298 | ||
224a0597 | 2299 | static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb, |
a4b4766c | 2300 | enum ip_conntrack_info *ctinfo) |
b7bd1809 | 2301 | { |
ab8bc7ed | 2302 | return nf_ct_get(skb, ctinfo); |
b7bd1809 PNA |
2303 | } |
2304 | ||
a4b4766c | 2305 | static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct) |
9cb01766 | 2306 | { |
308ac914 | 2307 | const struct nf_conntrack_zone *zone; |
9cb01766 PNA |
2308 | struct nlattr *nest_parms; |
2309 | ||
deedb590 DB |
2310 | zone = nf_ct_zone(ct); |
2311 | ||
9cb01766 PNA |
2312 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
2313 | if (!nest_parms) | |
2314 | goto nla_put_failure; | |
2315 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) | |
2316 | goto nla_put_failure; | |
deedb590 DB |
2317 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
2318 | NF_CT_ZONE_DIR_ORIG) < 0) | |
2319 | goto nla_put_failure; | |
9cb01766 PNA |
2320 | nla_nest_end(skb, nest_parms); |
2321 | ||
2322 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); | |
2323 | if (!nest_parms) | |
2324 | goto nla_put_failure; | |
2325 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) | |
2326 | goto nla_put_failure; | |
deedb590 DB |
2327 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
2328 | NF_CT_ZONE_DIR_REPL) < 0) | |
2329 | goto nla_put_failure; | |
9cb01766 PNA |
2330 | nla_nest_end(skb, nest_parms); |
2331 | ||
deedb590 DB |
2332 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
2333 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
308ac914 | 2334 | goto nla_put_failure; |
9cb01766 PNA |
2335 | |
2336 | if (ctnetlink_dump_id(skb, ct) < 0) | |
2337 | goto nla_put_failure; | |
2338 | ||
2339 | if (ctnetlink_dump_status(skb, ct) < 0) | |
2340 | goto nla_put_failure; | |
2341 | ||
2342 | if (ctnetlink_dump_timeout(skb, ct) < 0) | |
2343 | goto nla_put_failure; | |
2344 | ||
2345 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) | |
2346 | goto nla_put_failure; | |
2347 | ||
2348 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) | |
2349 | goto nla_put_failure; | |
2350 | ||
2351 | #ifdef CONFIG_NF_CONNTRACK_SECMARK | |
2352 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) | |
2353 | goto nla_put_failure; | |
2354 | #endif | |
2355 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) | |
2356 | goto nla_put_failure; | |
2357 | ||
2358 | if ((ct->status & IPS_SEQ_ADJUST) && | |
41d73ec0 | 2359 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
9cb01766 PNA |
2360 | goto nla_put_failure; |
2361 | ||
20710b3b PNA |
2362 | if (ctnetlink_dump_ct_synproxy(skb, ct) < 0) |
2363 | goto nla_put_failure; | |
2364 | ||
9cb01766 PNA |
2365 | #ifdef CONFIG_NF_CONNTRACK_MARK |
2366 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) | |
2367 | goto nla_put_failure; | |
2368 | #endif | |
0ceabd83 FW |
2369 | if (ctnetlink_dump_labels(skb, ct) < 0) |
2370 | goto nla_put_failure; | |
9cb01766 PNA |
2371 | return 0; |
2372 | ||
2373 | nla_put_failure: | |
9cb01766 PNA |
2374 | return -ENOSPC; |
2375 | } | |
2376 | ||
b7bd1809 | 2377 | static int |
a4b4766c KM |
2378 | ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct, |
2379 | enum ip_conntrack_info ctinfo, | |
2380 | u_int16_t ct_attr, u_int16_t ct_info_attr) | |
b7bd1809 PNA |
2381 | { |
2382 | struct nlattr *nest_parms; | |
2383 | ||
2384 | nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED); | |
2385 | if (!nest_parms) | |
2386 | goto nla_put_failure; | |
2387 | ||
a4b4766c | 2388 | if (__ctnetlink_glue_build(skb, ct) < 0) |
b7bd1809 PNA |
2389 | goto nla_put_failure; |
2390 | ||
2391 | nla_nest_end(skb, nest_parms); | |
2392 | ||
2393 | if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo))) | |
2394 | goto nla_put_failure; | |
2395 | ||
2396 | return 0; | |
2397 | ||
2398 | nla_put_failure: | |
2399 | return -ENOSPC; | |
2400 | } | |
2401 | ||
a963d710 KC |
2402 | static int |
2403 | ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[]) | |
2404 | { | |
2405 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); | |
2406 | unsigned long d = ct->status ^ status; | |
2407 | ||
2408 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) | |
2409 | /* SEEN_REPLY bit can only be set */ | |
2410 | return -EBUSY; | |
2411 | ||
2412 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) | |
2413 | /* ASSURED bit can only be set */ | |
2414 | return -EBUSY; | |
2415 | ||
2416 | /* This check is less strict than ctnetlink_change_status() | |
2417 | * because callers often flip IPS_EXPECTED bits when sending | |
2418 | * an NFQA_CT attribute to the kernel. So ignore the | |
53b56da8 LZ |
2419 | * unchangeable bits but do not error out. Also user programs |
2420 | * are allowed to clear the bits that they are allowed to change. | |
a963d710 | 2421 | */ |
53b56da8 | 2422 | __ctnetlink_change_status(ct, status, ~status); |
a963d710 KC |
2423 | return 0; |
2424 | } | |
2425 | ||
9cb01766 | 2426 | static int |
a4b4766c | 2427 | ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) |
9cb01766 PNA |
2428 | { |
2429 | int err; | |
2430 | ||
2431 | if (cda[CTA_TIMEOUT]) { | |
2432 | err = ctnetlink_change_timeout(ct, cda); | |
2433 | if (err < 0) | |
2434 | return err; | |
2435 | } | |
2436 | if (cda[CTA_STATUS]) { | |
a963d710 | 2437 | err = ctnetlink_update_status(ct, cda); |
9cb01766 PNA |
2438 | if (err < 0) |
2439 | return err; | |
2440 | } | |
2441 | if (cda[CTA_HELP]) { | |
2442 | err = ctnetlink_change_helper(ct, cda); | |
2443 | if (err < 0) | |
2444 | return err; | |
2445 | } | |
9b21f6a9 FW |
2446 | if (cda[CTA_LABELS]) { |
2447 | err = ctnetlink_attach_labels(ct, cda); | |
2448 | if (err < 0) | |
2449 | return err; | |
2450 | } | |
9cb01766 | 2451 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
534473c6 FW |
2452 | if (cda[CTA_MARK]) { |
2453 | u32 mask = 0, mark, newmark; | |
2454 | if (cda[CTA_MARK_MASK]) | |
2455 | mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
2456 | ||
2457 | mark = ntohl(nla_get_be32(cda[CTA_MARK])); | |
2458 | newmark = (ct->mark & mask) ^ mark; | |
2459 | if (newmark != ct->mark) | |
2460 | ct->mark = newmark; | |
2461 | } | |
9cb01766 PNA |
2462 | #endif |
2463 | return 0; | |
2464 | } | |
2465 | ||
2466 | static int | |
a4b4766c | 2467 | ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct) |
9cb01766 PNA |
2468 | { |
2469 | struct nlattr *cda[CTA_MAX+1]; | |
68e035c9 | 2470 | int ret; |
9cb01766 | 2471 | |
fceb6435 | 2472 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy, NULL); |
130ffbc2 DB |
2473 | if (ret < 0) |
2474 | return ret; | |
9cb01766 | 2475 | |
88be4c09 | 2476 | return ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct); |
9cb01766 PNA |
2477 | } |
2478 | ||
a4b4766c KM |
2479 | static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda, |
2480 | const struct nf_conn *ct, | |
2481 | struct nf_conntrack_tuple *tuple, | |
2482 | struct nf_conntrack_tuple *mask) | |
bd077937 PNA |
2483 | { |
2484 | int err; | |
2485 | ||
2486 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, | |
deedb590 | 2487 | nf_ct_l3num(ct), NULL); |
bd077937 PNA |
2488 | if (err < 0) |
2489 | return err; | |
2490 | ||
2491 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, | |
deedb590 | 2492 | nf_ct_l3num(ct), NULL); |
bd077937 PNA |
2493 | } |
2494 | ||
2495 | static int | |
a4b4766c KM |
2496 | ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, |
2497 | u32 portid, u32 report) | |
bd077937 PNA |
2498 | { |
2499 | struct nlattr *cda[CTA_EXPECT_MAX+1]; | |
2500 | struct nf_conntrack_tuple tuple, mask; | |
b7e092c0 | 2501 | struct nf_conntrack_helper *helper = NULL; |
bd077937 PNA |
2502 | struct nf_conntrack_expect *exp; |
2503 | int err; | |
2504 | ||
fceb6435 JB |
2505 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy, |
2506 | NULL); | |
bd077937 PNA |
2507 | if (err < 0) |
2508 | return err; | |
2509 | ||
a4b4766c KM |
2510 | err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda, |
2511 | ct, &tuple, &mask); | |
bd077937 PNA |
2512 | if (err < 0) |
2513 | return err; | |
2514 | ||
2515 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
2516 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
2517 | ||
2518 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), | |
2519 | nf_ct_protonum(ct)); | |
2520 | if (helper == NULL) | |
2521 | return -EOPNOTSUPP; | |
2522 | } | |
2523 | ||
2524 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, | |
2525 | helper, &tuple, &mask); | |
2526 | if (IS_ERR(exp)) | |
2527 | return PTR_ERR(exp); | |
2528 | ||
2529 | err = nf_ct_expect_related_report(exp, portid, report); | |
b18bcb00 LZ |
2530 | nf_ct_expect_put(exp); |
2531 | return err; | |
bd077937 PNA |
2532 | } |
2533 | ||
a4b4766c KM |
2534 | static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct, |
2535 | enum ip_conntrack_info ctinfo, int diff) | |
b7bd1809 PNA |
2536 | { |
2537 | if (!(ct->status & IPS_NAT_MASK)) | |
2538 | return; | |
2539 | ||
2540 | nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff); | |
2541 | } | |
2542 | ||
a4b4766c KM |
2543 | static struct nfnl_ct_hook ctnetlink_glue_hook = { |
2544 | .get_ct = ctnetlink_glue_get_ct, | |
2545 | .build_size = ctnetlink_glue_build_size, | |
2546 | .build = ctnetlink_glue_build, | |
2547 | .parse = ctnetlink_glue_parse, | |
2548 | .attach_expect = ctnetlink_glue_attach_expect, | |
2549 | .seq_adjust = ctnetlink_glue_seqadj, | |
9cb01766 | 2550 | }; |
83f3e94d | 2551 | #endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */ |
9cb01766 | 2552 | |
601e68e1 YH |
2553 | /*********************************************************************** |
2554 | * EXPECT | |
2555 | ***********************************************************************/ | |
c1d10adb | 2556 | |
4054ff45 PNA |
2557 | static int ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
2558 | const struct nf_conntrack_tuple *tuple, | |
a2b7cbdd | 2559 | u32 type) |
c1d10adb | 2560 | { |
df6fb868 | 2561 | struct nlattr *nest_parms; |
601e68e1 | 2562 | |
df6fb868 PM |
2563 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
2564 | if (!nest_parms) | |
2565 | goto nla_put_failure; | |
c1d10adb | 2566 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
2567 | goto nla_put_failure; |
2568 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
2569 | |
2570 | return 0; | |
2571 | ||
df6fb868 | 2572 | nla_put_failure: |
c1d10adb | 2573 | return -1; |
601e68e1 | 2574 | } |
c1d10adb | 2575 | |
4054ff45 PNA |
2576 | static int ctnetlink_exp_dump_mask(struct sk_buff *skb, |
2577 | const struct nf_conntrack_tuple *tuple, | |
2578 | const struct nf_conntrack_tuple_mask *mask) | |
1cde6436 | 2579 | { |
b3480fe0 FW |
2580 | const struct nf_conntrack_l3proto *l3proto; |
2581 | const struct nf_conntrack_l4proto *l4proto; | |
d4156e8c | 2582 | struct nf_conntrack_tuple m; |
df6fb868 | 2583 | struct nlattr *nest_parms; |
b3480fe0 | 2584 | int ret; |
d4156e8c PM |
2585 | |
2586 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 2587 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
2588 | m.src.u.all = mask->src.u.all; |
2589 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 2590 | |
df6fb868 PM |
2591 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
2592 | if (!nest_parms) | |
2593 | goto nla_put_failure; | |
1cde6436 | 2594 | |
3b988ece | 2595 | rcu_read_lock(); |
528a3a6f | 2596 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 2597 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
3b988ece HS |
2598 | if (ret >= 0) { |
2599 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
2600 | tuple->dst.protonum); | |
d4156e8c | 2601 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
3b988ece HS |
2602 | } |
2603 | rcu_read_unlock(); | |
2604 | ||
1cde6436 | 2605 | if (unlikely(ret < 0)) |
df6fb868 | 2606 | goto nla_put_failure; |
1cde6436 | 2607 | |
df6fb868 | 2608 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
2609 | |
2610 | return 0; | |
2611 | ||
df6fb868 | 2612 | nla_put_failure: |
1cde6436 PNA |
2613 | return -1; |
2614 | } | |
2615 | ||
c7232c99 PM |
2616 | static const union nf_inet_addr any_addr; |
2617 | ||
bb5cf80e | 2618 | static int |
c1d10adb | 2619 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 2620 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2621 | { |
2622 | struct nf_conn *master = exp->master; | |
c1216382 | 2623 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
bc01befd | 2624 | struct nf_conn_help *help; |
076a0ca0 PNA |
2625 | #ifdef CONFIG_NF_NAT_NEEDED |
2626 | struct nlattr *nest_parms; | |
2627 | struct nf_conntrack_tuple nat_tuple = {}; | |
2628 | #endif | |
544d5c7d PNA |
2629 | struct nf_ct_helper_expectfn *expfn; |
2630 | ||
d978e5da PM |
2631 | if (timeout < 0) |
2632 | timeout = 0; | |
c1d10adb PNA |
2633 | |
2634 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 2635 | goto nla_put_failure; |
1cde6436 | 2636 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 2637 | goto nla_put_failure; |
c1d10adb PNA |
2638 | if (ctnetlink_exp_dump_tuple(skb, |
2639 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
2640 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 2641 | goto nla_put_failure; |
601e68e1 | 2642 | |
076a0ca0 | 2643 | #ifdef CONFIG_NF_NAT_NEEDED |
c7232c99 PM |
2644 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
2645 | exp->saved_proto.all) { | |
076a0ca0 PNA |
2646 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
2647 | if (!nest_parms) | |
2648 | goto nla_put_failure; | |
2649 | ||
cc1eb431 DM |
2650 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
2651 | goto nla_put_failure; | |
076a0ca0 PNA |
2652 | |
2653 | nat_tuple.src.l3num = nf_ct_l3num(master); | |
c7232c99 | 2654 | nat_tuple.src.u3 = exp->saved_addr; |
076a0ca0 PNA |
2655 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
2656 | nat_tuple.src.u = exp->saved_proto; | |
2657 | ||
2658 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, | |
2659 | CTA_EXPECT_NAT_TUPLE) < 0) | |
2660 | goto nla_put_failure; | |
2661 | nla_nest_end(skb, nest_parms); | |
2662 | } | |
2663 | #endif | |
cc1eb431 DM |
2664 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
2665 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || | |
2666 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || | |
2667 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) | |
2668 | goto nla_put_failure; | |
bc01befd PNA |
2669 | help = nfct_help(master); |
2670 | if (help) { | |
2671 | struct nf_conntrack_helper *helper; | |
2672 | ||
2673 | helper = rcu_dereference(help->helper); | |
cc1eb431 DM |
2674 | if (helper && |
2675 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) | |
2676 | goto nla_put_failure; | |
bc01befd | 2677 | } |
544d5c7d | 2678 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
cc1eb431 DM |
2679 | if (expfn != NULL && |
2680 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) | |
2681 | goto nla_put_failure; | |
c1d10adb PNA |
2682 | |
2683 | return 0; | |
601e68e1 | 2684 | |
df6fb868 | 2685 | nla_put_failure: |
c1d10adb PNA |
2686 | return -1; |
2687 | } | |
2688 | ||
2689 | static int | |
15e47304 | 2690 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
8b0a231d | 2691 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2692 | { |
2693 | struct nlmsghdr *nlh; | |
2694 | struct nfgenmsg *nfmsg; | |
15e47304 | 2695 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
c1d10adb | 2696 | |
dedb67c4 | 2697 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event); |
15e47304 | 2698 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2699 | if (nlh == NULL) |
2700 | goto nlmsg_failure; | |
c1d10adb | 2701 | |
96bcf938 | 2702 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2703 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2704 | nfmsg->version = NFNETLINK_V0; | |
2705 | nfmsg->res_id = 0; | |
2706 | ||
2707 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 2708 | goto nla_put_failure; |
c1d10adb | 2709 | |
96bcf938 | 2710 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
2711 | return skb->len; |
2712 | ||
2713 | nlmsg_failure: | |
df6fb868 | 2714 | nla_put_failure: |
96bcf938 | 2715 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
2716 | return -1; |
2717 | } | |
2718 | ||
2719 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
2720 | static int |
2721 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 2722 | { |
9592a5c0 AD |
2723 | struct nf_conntrack_expect *exp = item->exp; |
2724 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
2725 | struct nlmsghdr *nlh; |
2726 | struct nfgenmsg *nfmsg; | |
c1d10adb | 2727 | struct sk_buff *skb; |
ebbf41df | 2728 | unsigned int type, group; |
c1d10adb PNA |
2729 | int flags = 0; |
2730 | ||
ebbf41df PNA |
2731 | if (events & (1 << IPEXP_DESTROY)) { |
2732 | type = IPCTNL_MSG_EXP_DELETE; | |
2733 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; | |
2734 | } else if (events & (1 << IPEXP_NEW)) { | |
c1d10adb PNA |
2735 | type = IPCTNL_MSG_EXP_NEW; |
2736 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
ebbf41df | 2737 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
c1d10adb | 2738 | } else |
e34d5c1a | 2739 | return 0; |
c1d10adb | 2740 | |
ebbf41df | 2741 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
e34d5c1a | 2742 | return 0; |
b3a27bfb | 2743 | |
96bcf938 PNA |
2744 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
2745 | if (skb == NULL) | |
150ace0d | 2746 | goto errout; |
c1d10adb | 2747 | |
dedb67c4 | 2748 | type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type); |
15e47304 | 2749 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2750 | if (nlh == NULL) |
2751 | goto nlmsg_failure; | |
c1d10adb | 2752 | |
96bcf938 | 2753 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2754 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2755 | nfmsg->version = NFNETLINK_V0; | |
2756 | nfmsg->res_id = 0; | |
2757 | ||
2758 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 2759 | goto nla_put_failure; |
c1d10adb | 2760 | |
96bcf938 | 2761 | nlmsg_end(skb, nlh); |
15e47304 | 2762 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
e34d5c1a | 2763 | return 0; |
c1d10adb | 2764 | |
df6fb868 | 2765 | nla_put_failure: |
96bcf938 | 2766 | nlmsg_cancel(skb, nlh); |
528a3a6f | 2767 | nlmsg_failure: |
c1d10adb | 2768 | kfree_skb(skb); |
150ace0d | 2769 | errout: |
9592a5c0 | 2770 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 2771 | return 0; |
c1d10adb PNA |
2772 | } |
2773 | #endif | |
cf6994c2 PM |
2774 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
2775 | { | |
31f15875 PM |
2776 | if (cb->args[1]) |
2777 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
2778 | return 0; |
2779 | } | |
c1d10adb PNA |
2780 | |
2781 | static int | |
2782 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2783 | { | |
9592a5c0 | 2784 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 2785 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 2786 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 2787 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 2788 | |
7d0742da | 2789 | rcu_read_lock(); |
31f15875 PM |
2790 | last = (struct nf_conntrack_expect *)cb->args[1]; |
2791 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 2792 | restart: |
7cddd967 LZ |
2793 | hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]], |
2794 | hnode) { | |
31f15875 | 2795 | if (l3proto && exp->tuple.src.l3num != l3proto) |
cf6994c2 | 2796 | continue; |
03d7dc5c FW |
2797 | |
2798 | if (!net_eq(nf_ct_net(exp->master), net)) | |
2799 | continue; | |
2800 | ||
31f15875 PM |
2801 | if (cb->args[1]) { |
2802 | if (exp != last) | |
2803 | continue; | |
2804 | cb->args[1] = 0; | |
2805 | } | |
8b0a231d | 2806 | if (ctnetlink_exp_fill_info(skb, |
15e47304 | 2807 | NETLINK_CB(cb->skb).portid, |
31f15875 PM |
2808 | cb->nlh->nlmsg_seq, |
2809 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 2810 | exp) < 0) { |
b54ab92b | 2811 | if (!refcount_inc_not_zero(&exp->use)) |
7d0742da | 2812 | continue; |
31f15875 PM |
2813 | cb->args[1] = (unsigned long)exp; |
2814 | goto out; | |
2815 | } | |
cf6994c2 | 2816 | } |
31f15875 PM |
2817 | if (cb->args[1]) { |
2818 | cb->args[1] = 0; | |
2819 | goto restart; | |
cf6994c2 PM |
2820 | } |
2821 | } | |
601e68e1 | 2822 | out: |
7d0742da | 2823 | rcu_read_unlock(); |
cf6994c2 PM |
2824 | if (last) |
2825 | nf_ct_expect_put(last); | |
c1d10adb | 2826 | |
c1d10adb PNA |
2827 | return skb->len; |
2828 | } | |
2829 | ||
e844a928 PNA |
2830 | static int |
2831 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2832 | { | |
2833 | struct nf_conntrack_expect *exp, *last; | |
2834 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
2835 | struct nf_conn *ct = cb->data; | |
2836 | struct nf_conn_help *help = nfct_help(ct); | |
2837 | u_int8_t l3proto = nfmsg->nfgen_family; | |
2838 | ||
2839 | if (cb->args[0]) | |
2840 | return 0; | |
2841 | ||
2842 | rcu_read_lock(); | |
2843 | last = (struct nf_conntrack_expect *)cb->args[1]; | |
2844 | restart: | |
7cddd967 | 2845 | hlist_for_each_entry_rcu(exp, &help->expectations, lnode) { |
e844a928 PNA |
2846 | if (l3proto && exp->tuple.src.l3num != l3proto) |
2847 | continue; | |
2848 | if (cb->args[1]) { | |
2849 | if (exp != last) | |
2850 | continue; | |
2851 | cb->args[1] = 0; | |
2852 | } | |
2853 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
2854 | cb->nlh->nlmsg_seq, | |
2855 | IPCTNL_MSG_EXP_NEW, | |
2856 | exp) < 0) { | |
b54ab92b | 2857 | if (!refcount_inc_not_zero(&exp->use)) |
e844a928 PNA |
2858 | continue; |
2859 | cb->args[1] = (unsigned long)exp; | |
2860 | goto out; | |
2861 | } | |
2862 | } | |
2863 | if (cb->args[1]) { | |
2864 | cb->args[1] = 0; | |
2865 | goto restart; | |
2866 | } | |
2867 | cb->args[0] = 1; | |
2868 | out: | |
2869 | rcu_read_unlock(); | |
2870 | if (last) | |
2871 | nf_ct_expect_put(last); | |
2872 | ||
2873 | return skb->len; | |
2874 | } | |
2875 | ||
7b8002a1 PNA |
2876 | static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl, |
2877 | struct sk_buff *skb, | |
e844a928 | 2878 | const struct nlmsghdr *nlh, |
04ba724b PNA |
2879 | const struct nlattr * const cda[], |
2880 | struct netlink_ext_ack *extack) | |
e844a928 PNA |
2881 | { |
2882 | int err; | |
e844a928 PNA |
2883 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
2884 | u_int8_t u3 = nfmsg->nfgen_family; | |
2885 | struct nf_conntrack_tuple tuple; | |
2886 | struct nf_conntrack_tuple_hash *h; | |
2887 | struct nf_conn *ct; | |
308ac914 | 2888 | struct nf_conntrack_zone zone; |
e844a928 PNA |
2889 | struct netlink_dump_control c = { |
2890 | .dump = ctnetlink_exp_ct_dump_table, | |
2891 | .done = ctnetlink_exp_done, | |
2892 | }; | |
2893 | ||
deedb590 DB |
2894 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
2895 | u3, NULL); | |
e844a928 PNA |
2896 | if (err < 0) |
2897 | return err; | |
2898 | ||
308ac914 DB |
2899 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2900 | if (err < 0) | |
2901 | return err; | |
e844a928 | 2902 | |
308ac914 | 2903 | h = nf_conntrack_find_get(net, &zone, &tuple); |
e844a928 PNA |
2904 | if (!h) |
2905 | return -ENOENT; | |
2906 | ||
2907 | ct = nf_ct_tuplehash_to_ctrack(h); | |
207df815 LZ |
2908 | /* No expectation linked to this connection tracking. */ |
2909 | if (!nfct_help(ct)) { | |
2910 | nf_ct_put(ct); | |
2911 | return 0; | |
2912 | } | |
2913 | ||
e844a928 PNA |
2914 | c.data = ct; |
2915 | ||
2916 | err = netlink_dump_start(ctnl, skb, nlh, &c); | |
2917 | nf_ct_put(ct); | |
2918 | ||
2919 | return err; | |
2920 | } | |
2921 | ||
7b8002a1 PNA |
2922 | static int ctnetlink_get_expect(struct net *net, struct sock *ctnl, |
2923 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2924 | const struct nlattr * const cda[], |
2925 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
2926 | { |
2927 | struct nf_conntrack_tuple tuple; | |
2928 | struct nf_conntrack_expect *exp; | |
2929 | struct sk_buff *skb2; | |
96bcf938 | 2930 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2931 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 2932 | struct nf_conntrack_zone zone; |
ef00f89f | 2933 | int err; |
c1d10adb | 2934 | |
b8f3ab42 | 2935 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
e844a928 | 2936 | if (cda[CTA_EXPECT_MASTER]) |
04ba724b PNA |
2937 | return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda, |
2938 | extack); | |
e844a928 PNA |
2939 | else { |
2940 | struct netlink_dump_control c = { | |
2941 | .dump = ctnetlink_exp_dump_table, | |
2942 | .done = ctnetlink_exp_done, | |
2943 | }; | |
2944 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2945 | } | |
c1d10adb PNA |
2946 | } |
2947 | ||
ef00f89f PM |
2948 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2949 | if (err < 0) | |
2950 | return err; | |
2951 | ||
35dba1d7 | 2952 | if (cda[CTA_EXPECT_TUPLE]) |
deedb590 DB |
2953 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
2954 | u3, NULL); | |
35dba1d7 | 2955 | else if (cda[CTA_EXPECT_MASTER]) |
deedb590 DB |
2956 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
2957 | u3, NULL); | |
c1d10adb PNA |
2958 | else |
2959 | return -EINVAL; | |
2960 | ||
2961 | if (err < 0) | |
2962 | return err; | |
2963 | ||
308ac914 | 2964 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
c1d10adb PNA |
2965 | if (!exp) |
2966 | return -ENOENT; | |
2967 | ||
df6fb868 | 2968 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 2969 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 2970 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 2971 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2972 | return -ENOENT; |
2973 | } | |
601e68e1 | 2974 | } |
c1d10adb PNA |
2975 | |
2976 | err = -ENOMEM; | |
96bcf938 | 2977 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
81378f72 PNA |
2978 | if (skb2 == NULL) { |
2979 | nf_ct_expect_put(exp); | |
c1d10adb | 2980 | goto out; |
81378f72 | 2981 | } |
4e9b8269 | 2982 | |
528a3a6f | 2983 | rcu_read_lock(); |
15e47304 | 2984 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
8b0a231d | 2985 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 2986 | rcu_read_unlock(); |
81378f72 | 2987 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2988 | if (err <= 0) |
2989 | goto free; | |
2990 | ||
15e47304 | 2991 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
81378f72 PNA |
2992 | if (err < 0) |
2993 | goto out; | |
c1d10adb | 2994 | |
81378f72 | 2995 | return 0; |
c1d10adb PNA |
2996 | |
2997 | free: | |
2998 | kfree_skb(skb2); | |
2999 | out: | |
81378f72 PNA |
3000 | /* this avoids a loop in nfnetlink. */ |
3001 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
3002 | } |
3003 | ||
ac7b8483 FW |
3004 | static bool expect_iter_name(struct nf_conntrack_expect *exp, void *data) |
3005 | { | |
3006 | const struct nf_conn_help *m_help; | |
3007 | const char *name = data; | |
3008 | ||
3009 | m_help = nfct_help(exp->master); | |
3010 | ||
3011 | return strcmp(m_help->helper->name, name) == 0; | |
3012 | } | |
3013 | ||
3014 | static bool expect_iter_all(struct nf_conntrack_expect *exp, void *data) | |
3015 | { | |
3016 | return true; | |
3017 | } | |
3018 | ||
7b8002a1 PNA |
3019 | static int ctnetlink_del_expect(struct net *net, struct sock *ctnl, |
3020 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
3021 | const struct nlattr * const cda[], |
3022 | struct netlink_ext_ack *extack) | |
c1d10adb | 3023 | { |
31f15875 | 3024 | struct nf_conntrack_expect *exp; |
c1d10adb | 3025 | struct nf_conntrack_tuple tuple; |
96bcf938 | 3026 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 3027 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 3028 | struct nf_conntrack_zone zone; |
c1d10adb PNA |
3029 | int err; |
3030 | ||
df6fb868 | 3031 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 3032 | /* delete a single expect by tuple */ |
ef00f89f PM |
3033 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
3034 | if (err < 0) | |
3035 | return err; | |
3036 | ||
deedb590 DB |
3037 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3038 | u3, NULL); | |
c1d10adb PNA |
3039 | if (err < 0) |
3040 | return err; | |
3041 | ||
3042 | /* bump usage count to 2 */ | |
308ac914 | 3043 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
c1d10adb PNA |
3044 | if (!exp) |
3045 | return -ENOENT; | |
3046 | ||
df6fb868 | 3047 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 3048 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 3049 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 3050 | nf_ct_expect_put(exp); |
c1d10adb PNA |
3051 | return -ENOENT; |
3052 | } | |
3053 | } | |
3054 | ||
3055 | /* after list removal, usage count == 1 */ | |
ca7433df | 3056 | spin_lock_bh(&nf_conntrack_expect_lock); |
ebbf41df | 3057 | if (del_timer(&exp->timeout)) { |
15e47304 | 3058 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
ebbf41df PNA |
3059 | nlmsg_report(nlh)); |
3060 | nf_ct_expect_put(exp); | |
3061 | } | |
ca7433df | 3062 | spin_unlock_bh(&nf_conntrack_expect_lock); |
601e68e1 | 3063 | /* have to put what we 'get' above. |
c1d10adb | 3064 | * after this line usage count == 0 */ |
6823645d | 3065 | nf_ct_expect_put(exp); |
df6fb868 PM |
3066 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
3067 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
c1d10adb | 3068 | |
ac7b8483 FW |
3069 | nf_ct_expect_iterate_net(net, expect_iter_name, name, |
3070 | NETLINK_CB(skb).portid, | |
3071 | nlmsg_report(nlh)); | |
c1d10adb PNA |
3072 | } else { |
3073 | /* This basically means we have to flush everything*/ | |
ac7b8483 FW |
3074 | nf_ct_expect_iterate_net(net, expect_iter_all, NULL, |
3075 | NETLINK_CB(skb).portid, | |
3076 | nlmsg_report(nlh)); | |
c1d10adb PNA |
3077 | } |
3078 | ||
3079 | return 0; | |
3080 | } | |
3081 | static int | |
39938324 PM |
3082 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
3083 | const struct nlattr * const cda[]) | |
c1d10adb | 3084 | { |
9768e1ac KW |
3085 | if (cda[CTA_EXPECT_TIMEOUT]) { |
3086 | if (!del_timer(&x->timeout)) | |
3087 | return -ETIME; | |
3088 | ||
3089 | x->timeout.expires = jiffies + | |
3090 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
3091 | add_timer(&x->timeout); | |
3092 | } | |
3093 | return 0; | |
c1d10adb PNA |
3094 | } |
3095 | ||
076a0ca0 PNA |
3096 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
3097 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, | |
3098 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, | |
3099 | }; | |
3100 | ||
3101 | static int | |
3102 | ctnetlink_parse_expect_nat(const struct nlattr *attr, | |
3103 | struct nf_conntrack_expect *exp, | |
3104 | u_int8_t u3) | |
3105 | { | |
3106 | #ifdef CONFIG_NF_NAT_NEEDED | |
3107 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; | |
3108 | struct nf_conntrack_tuple nat_tuple = {}; | |
3109 | int err; | |
3110 | ||
fceb6435 JB |
3111 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, |
3112 | exp_nat_nla_policy, NULL); | |
130ffbc2 DB |
3113 | if (err < 0) |
3114 | return err; | |
076a0ca0 PNA |
3115 | |
3116 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) | |
3117 | return -EINVAL; | |
3118 | ||
3119 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, | |
deedb590 DB |
3120 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, |
3121 | u3, NULL); | |
076a0ca0 PNA |
3122 | if (err < 0) |
3123 | return err; | |
3124 | ||
c7232c99 | 3125 | exp->saved_addr = nat_tuple.src.u3; |
076a0ca0 PNA |
3126 | exp->saved_proto = nat_tuple.src.u; |
3127 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); | |
3128 | ||
3129 | return 0; | |
3130 | #else | |
3131 | return -EOPNOTSUPP; | |
3132 | #endif | |
3133 | } | |
3134 | ||
0ef71ee1 PNA |
3135 | static struct nf_conntrack_expect * |
3136 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, | |
3137 | struct nf_conntrack_helper *helper, | |
3138 | struct nf_conntrack_tuple *tuple, | |
3139 | struct nf_conntrack_tuple *mask) | |
c1d10adb | 3140 | { |
0ef71ee1 | 3141 | u_int32_t class = 0; |
c1d10adb | 3142 | struct nf_conntrack_expect *exp; |
dc808fe2 | 3143 | struct nf_conn_help *help; |
0ef71ee1 | 3144 | int err; |
660fdb2a | 3145 | |
2c62e0bc GF |
3146 | help = nfct_help(ct); |
3147 | if (!help) | |
3148 | return ERR_PTR(-EOPNOTSUPP); | |
3149 | ||
b8c5e52c PNA |
3150 | if (cda[CTA_EXPECT_CLASS] && helper) { |
3151 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); | |
0ef71ee1 PNA |
3152 | if (class > helper->expect_class_max) |
3153 | return ERR_PTR(-EINVAL); | |
b8c5e52c | 3154 | } |
6823645d | 3155 | exp = nf_ct_expect_alloc(ct); |
0ef71ee1 PNA |
3156 | if (!exp) |
3157 | return ERR_PTR(-ENOMEM); | |
3158 | ||
2c62e0bc GF |
3159 | if (cda[CTA_EXPECT_FLAGS]) { |
3160 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
3161 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; | |
bc01befd | 3162 | } else { |
2c62e0bc | 3163 | exp->flags = 0; |
bc01befd | 3164 | } |
544d5c7d PNA |
3165 | if (cda[CTA_EXPECT_FN]) { |
3166 | const char *name = nla_data(cda[CTA_EXPECT_FN]); | |
3167 | struct nf_ct_helper_expectfn *expfn; | |
3168 | ||
3169 | expfn = nf_ct_helper_expectfn_find_by_name(name); | |
3170 | if (expfn == NULL) { | |
3171 | err = -EINVAL; | |
3172 | goto err_out; | |
3173 | } | |
3174 | exp->expectfn = expfn->expectfn; | |
3175 | } else | |
3176 | exp->expectfn = NULL; | |
601e68e1 | 3177 | |
b8c5e52c | 3178 | exp->class = class; |
c1d10adb | 3179 | exp->master = ct; |
660fdb2a | 3180 | exp->helper = helper; |
0ef71ee1 PNA |
3181 | exp->tuple = *tuple; |
3182 | exp->mask.src.u3 = mask->src.u3; | |
3183 | exp->mask.src.u.all = mask->src.u.all; | |
c1d10adb | 3184 | |
076a0ca0 PNA |
3185 | if (cda[CTA_EXPECT_NAT]) { |
3186 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], | |
0ef71ee1 | 3187 | exp, nf_ct_l3num(ct)); |
076a0ca0 PNA |
3188 | if (err < 0) |
3189 | goto err_out; | |
3190 | } | |
0ef71ee1 | 3191 | return exp; |
076a0ca0 | 3192 | err_out: |
6823645d | 3193 | nf_ct_expect_put(exp); |
0ef71ee1 PNA |
3194 | return ERR_PTR(err); |
3195 | } | |
3196 | ||
3197 | static int | |
308ac914 DB |
3198 | ctnetlink_create_expect(struct net *net, |
3199 | const struct nf_conntrack_zone *zone, | |
0ef71ee1 PNA |
3200 | const struct nlattr * const cda[], |
3201 | u_int8_t u3, u32 portid, int report) | |
3202 | { | |
3203 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
3204 | struct nf_conntrack_tuple_hash *h = NULL; | |
3205 | struct nf_conntrack_helper *helper = NULL; | |
3206 | struct nf_conntrack_expect *exp; | |
3207 | struct nf_conn *ct; | |
3208 | int err; | |
3209 | ||
3210 | /* caller guarantees that those three CTA_EXPECT_* exist */ | |
deedb590 DB |
3211 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3212 | u3, NULL); | |
0ef71ee1 PNA |
3213 | if (err < 0) |
3214 | return err; | |
deedb590 DB |
3215 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, |
3216 | u3, NULL); | |
0ef71ee1 PNA |
3217 | if (err < 0) |
3218 | return err; | |
deedb590 DB |
3219 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, |
3220 | u3, NULL); | |
0ef71ee1 PNA |
3221 | if (err < 0) |
3222 | return err; | |
3223 | ||
3224 | /* Look for master conntrack of this expectation */ | |
3225 | h = nf_conntrack_find_get(net, zone, &master_tuple); | |
3226 | if (!h) | |
3227 | return -ENOENT; | |
3228 | ct = nf_ct_tuplehash_to_ctrack(h); | |
3229 | ||
8b5995d0 | 3230 | rcu_read_lock(); |
0ef71ee1 PNA |
3231 | if (cda[CTA_EXPECT_HELP_NAME]) { |
3232 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
3233 | ||
3234 | helper = __nf_conntrack_helper_find(helpname, u3, | |
3235 | nf_ct_protonum(ct)); | |
3236 | if (helper == NULL) { | |
8b5995d0 | 3237 | rcu_read_unlock(); |
0ef71ee1 PNA |
3238 | #ifdef CONFIG_MODULES |
3239 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
3240 | err = -EOPNOTSUPP; | |
3241 | goto err_ct; | |
3242 | } | |
8b5995d0 | 3243 | rcu_read_lock(); |
0ef71ee1 PNA |
3244 | helper = __nf_conntrack_helper_find(helpname, u3, |
3245 | nf_ct_protonum(ct)); | |
3246 | if (helper) { | |
3247 | err = -EAGAIN; | |
8b5995d0 | 3248 | goto err_rcu; |
0ef71ee1 | 3249 | } |
8b5995d0 | 3250 | rcu_read_unlock(); |
0ef71ee1 PNA |
3251 | #endif |
3252 | err = -EOPNOTSUPP; | |
3253 | goto err_ct; | |
3254 | } | |
3255 | } | |
3256 | ||
3257 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); | |
3258 | if (IS_ERR(exp)) { | |
3259 | err = PTR_ERR(exp); | |
8b5995d0 | 3260 | goto err_rcu; |
0ef71ee1 PNA |
3261 | } |
3262 | ||
3263 | err = nf_ct_expect_related_report(exp, portid, report); | |
0ef71ee1 | 3264 | nf_ct_expect_put(exp); |
8b5995d0 GF |
3265 | err_rcu: |
3266 | rcu_read_unlock(); | |
0ef71ee1 PNA |
3267 | err_ct: |
3268 | nf_ct_put(ct); | |
c1d10adb PNA |
3269 | return err; |
3270 | } | |
3271 | ||
7b8002a1 PNA |
3272 | static int ctnetlink_new_expect(struct net *net, struct sock *ctnl, |
3273 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
3274 | const struct nlattr * const cda[], |
3275 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
3276 | { |
3277 | struct nf_conntrack_tuple tuple; | |
3278 | struct nf_conntrack_expect *exp; | |
96bcf938 | 3279 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 3280 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 3281 | struct nf_conntrack_zone zone; |
ef00f89f | 3282 | int err; |
c1d10adb | 3283 | |
df6fb868 PM |
3284 | if (!cda[CTA_EXPECT_TUPLE] |
3285 | || !cda[CTA_EXPECT_MASK] | |
3286 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
3287 | return -EINVAL; |
3288 | ||
ef00f89f PM |
3289 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
3290 | if (err < 0) | |
3291 | return err; | |
3292 | ||
deedb590 DB |
3293 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3294 | u3, NULL); | |
c1d10adb PNA |
3295 | if (err < 0) |
3296 | return err; | |
3297 | ||
ca7433df | 3298 | spin_lock_bh(&nf_conntrack_expect_lock); |
308ac914 | 3299 | exp = __nf_ct_expect_find(net, &zone, &tuple); |
c1d10adb | 3300 | if (!exp) { |
ca7433df | 3301 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 3302 | err = -ENOENT; |
19abb7b0 | 3303 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
308ac914 | 3304 | err = ctnetlink_create_expect(net, &zone, cda, u3, |
15e47304 | 3305 | NETLINK_CB(skb).portid, |
19abb7b0 PNA |
3306 | nlmsg_report(nlh)); |
3307 | } | |
c1d10adb PNA |
3308 | return err; |
3309 | } | |
3310 | ||
3311 | err = -EEXIST; | |
3312 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
3313 | err = ctnetlink_change_expect(exp, cda); | |
ca7433df | 3314 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 3315 | |
c1d10adb PNA |
3316 | return err; |
3317 | } | |
3318 | ||
392025f8 | 3319 | static int |
15e47304 | 3320 | ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu, |
392025f8 PNA |
3321 | const struct ip_conntrack_stat *st) |
3322 | { | |
3323 | struct nlmsghdr *nlh; | |
3324 | struct nfgenmsg *nfmsg; | |
15e47304 | 3325 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 | 3326 | |
dedb67c4 PNA |
3327 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, |
3328 | IPCTNL_MSG_EXP_GET_STATS_CPU); | |
15e47304 | 3329 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
3330 | if (nlh == NULL) |
3331 | goto nlmsg_failure; | |
3332 | ||
3333 | nfmsg = nlmsg_data(nlh); | |
3334 | nfmsg->nfgen_family = AF_UNSPEC; | |
3335 | nfmsg->version = NFNETLINK_V0; | |
3336 | nfmsg->res_id = htons(cpu); | |
3337 | ||
3338 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || | |
3339 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || | |
3340 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) | |
3341 | goto nla_put_failure; | |
3342 | ||
3343 | nlmsg_end(skb, nlh); | |
3344 | return skb->len; | |
3345 | ||
3346 | nla_put_failure: | |
3347 | nlmsg_failure: | |
3348 | nlmsg_cancel(skb, nlh); | |
3349 | return -1; | |
3350 | } | |
3351 | ||
3352 | static int | |
3353 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3354 | { | |
3355 | int cpu; | |
3356 | struct net *net = sock_net(skb->sk); | |
3357 | ||
3358 | if (cb->args[0] == nr_cpu_ids) | |
3359 | return 0; | |
3360 | ||
3361 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
3362 | const struct ip_conntrack_stat *st; | |
3363 | ||
3364 | if (!cpu_possible(cpu)) | |
3365 | continue; | |
3366 | ||
3367 | st = per_cpu_ptr(net->ct.stat, cpu); | |
15e47304 | 3368 | if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
3369 | cb->nlh->nlmsg_seq, |
3370 | cpu, st) < 0) | |
3371 | break; | |
3372 | } | |
3373 | cb->args[0] = cpu; | |
3374 | ||
3375 | return skb->len; | |
3376 | } | |
3377 | ||
7b8002a1 PNA |
3378 | static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl, |
3379 | struct sk_buff *skb, | |
3380 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
3381 | const struct nlattr * const cda[], |
3382 | struct netlink_ext_ack *extack) | |
392025f8 PNA |
3383 | { |
3384 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
3385 | struct netlink_dump_control c = { | |
3386 | .dump = ctnetlink_exp_stat_cpu_dump, | |
3387 | }; | |
3388 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
3389 | } | |
3390 | ||
3391 | return 0; | |
3392 | } | |
3393 | ||
c1d10adb | 3394 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
e34d5c1a PNA |
3395 | static struct nf_ct_event_notifier ctnl_notifier = { |
3396 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
3397 | }; |
3398 | ||
e34d5c1a PNA |
3399 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
3400 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
3401 | }; |
3402 | #endif | |
3403 | ||
7c8d4cb4 | 3404 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 3405 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
3406 | .attr_count = CTA_MAX, |
3407 | .policy = ct_nla_policy }, | |
c1d10adb | 3408 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3409 | .attr_count = CTA_MAX, |
3410 | .policy = ct_nla_policy }, | |
c1d10adb | 3411 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
3412 | .attr_count = CTA_MAX, |
3413 | .policy = ct_nla_policy }, | |
c1d10adb | 3414 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3415 | .attr_count = CTA_MAX, |
3416 | .policy = ct_nla_policy }, | |
392025f8 PNA |
3417 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
3418 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, | |
d871befe PNA |
3419 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
3420 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, | |
c1d10adb PNA |
3421 | }; |
3422 | ||
7c8d4cb4 | 3423 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 3424 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
3425 | .attr_count = CTA_EXPECT_MAX, |
3426 | .policy = exp_nla_policy }, | |
c1d10adb | 3427 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
3428 | .attr_count = CTA_EXPECT_MAX, |
3429 | .policy = exp_nla_policy }, | |
c1d10adb | 3430 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
3431 | .attr_count = CTA_EXPECT_MAX, |
3432 | .policy = exp_nla_policy }, | |
392025f8 | 3433 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
c1d10adb PNA |
3434 | }; |
3435 | ||
7c8d4cb4 | 3436 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
3437 | .name = "conntrack", |
3438 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
3439 | .cb_count = IPCTNL_MSG_MAX, | |
3440 | .cb = ctnl_cb, | |
3441 | }; | |
3442 | ||
7c8d4cb4 | 3443 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
3444 | .name = "conntrack_expect", |
3445 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
3446 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
3447 | .cb = ctnl_exp_cb, | |
3448 | }; | |
3449 | ||
d2483dde | 3450 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 3451 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 3452 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb | 3453 | |
70e9942f PNA |
3454 | static int __net_init ctnetlink_net_init(struct net *net) |
3455 | { | |
3456 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3457 | int ret; | |
3458 | ||
3459 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); | |
3460 | if (ret < 0) { | |
3461 | pr_err("ctnetlink_init: cannot register notifier.\n"); | |
3462 | goto err_out; | |
3463 | } | |
3464 | ||
3465 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); | |
3466 | if (ret < 0) { | |
3467 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); | |
3468 | goto err_unreg_notifier; | |
3469 | } | |
3470 | #endif | |
3471 | return 0; | |
3472 | ||
3473 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3474 | err_unreg_notifier: | |
3475 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3476 | err_out: | |
3477 | return ret; | |
3478 | #endif | |
3479 | } | |
3480 | ||
3481 | static void ctnetlink_net_exit(struct net *net) | |
3482 | { | |
3483 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3484 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); | |
3485 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3486 | #endif | |
3487 | } | |
3488 | ||
3489 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) | |
3490 | { | |
3491 | struct net *net; | |
3492 | ||
3493 | list_for_each_entry(net, net_exit_list, exit_list) | |
3494 | ctnetlink_net_exit(net); | |
3495 | } | |
3496 | ||
3497 | static struct pernet_operations ctnetlink_net_ops = { | |
3498 | .init = ctnetlink_net_init, | |
3499 | .exit_batch = ctnetlink_net_exit_batch, | |
3500 | }; | |
3501 | ||
c1d10adb PNA |
3502 | static int __init ctnetlink_init(void) |
3503 | { | |
3504 | int ret; | |
3505 | ||
c1d10adb PNA |
3506 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
3507 | if (ret < 0) { | |
654d0fbd | 3508 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
c1d10adb PNA |
3509 | goto err_out; |
3510 | } | |
3511 | ||
3512 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
3513 | if (ret < 0) { | |
654d0fbd | 3514 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
c1d10adb PNA |
3515 | goto err_unreg_subsys; |
3516 | } | |
3517 | ||
ef6acf68 JL |
3518 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
3519 | if (ret < 0) { | |
70e9942f | 3520 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
c1d10adb PNA |
3521 | goto err_unreg_exp_subsys; |
3522 | } | |
83f3e94d | 3523 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
9cb01766 | 3524 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
a4b4766c | 3525 | RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook); |
9cb01766 | 3526 | #endif |
c1d10adb PNA |
3527 | return 0; |
3528 | ||
c1d10adb PNA |
3529 | err_unreg_exp_subsys: |
3530 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
c1d10adb PNA |
3531 | err_unreg_subsys: |
3532 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
3533 | err_out: | |
3534 | return ret; | |
3535 | } | |
3536 | ||
3537 | static void __exit ctnetlink_exit(void) | |
3538 | { | |
70e9942f | 3539 | unregister_pernet_subsys(&ctnetlink_net_ops); |
c1d10adb PNA |
3540 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
3541 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
83f3e94d | 3542 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
a4b4766c | 3543 | RCU_INIT_POINTER(nfnl_ct_hook, NULL); |
9cb01766 | 3544 | #endif |
3b7dabf0 | 3545 | synchronize_rcu(); |
c1d10adb PNA |
3546 | } |
3547 | ||
3548 | module_init(ctnetlink_init); | |
3549 | module_exit(ctnetlink_exit); |