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Commit | Line | Data |
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c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
392025f8 | 7 | * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
1cc63249 | 25 | #include <linux/security.h> |
c1d10adb PNA |
26 | #include <linux/skbuff.h> |
27 | #include <linux/errno.h> | |
28 | #include <linux/netlink.h> | |
29 | #include <linux/spinlock.h> | |
40a839fd | 30 | #include <linux/interrupt.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
c1d10adb PNA |
32 | |
33 | #include <linux/netfilter.h> | |
dc5fc579 | 34 | #include <net/netlink.h> |
9592a5c0 | 35 | #include <net/sock.h> |
c1d10adb PNA |
36 | #include <net/netfilter/nf_conntrack.h> |
37 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 38 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb | 39 | #include <net/netfilter/nf_conntrack_helper.h> |
41d73ec0 | 40 | #include <net/netfilter/nf_conntrack_seqadj.h> |
c1d10adb | 41 | #include <net/netfilter/nf_conntrack_l3proto.h> |
605dcad6 | 42 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 43 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 44 | #include <net/netfilter/nf_conntrack_acct.h> |
ef00f89f | 45 | #include <net/netfilter/nf_conntrack_zones.h> |
a992ca2a | 46 | #include <net/netfilter/nf_conntrack_timestamp.h> |
c539f017 | 47 | #include <net/netfilter/nf_conntrack_labels.h> |
5b1158e9 JK |
48 | #ifdef CONFIG_NF_NAT_NEEDED |
49 | #include <net/netfilter/nf_nat_core.h> | |
c7232c99 | 50 | #include <net/netfilter/nf_nat_l4proto.h> |
8c88f87c | 51 | #include <net/netfilter/nf_nat_helper.h> |
5b1158e9 | 52 | #endif |
c1d10adb PNA |
53 | |
54 | #include <linux/netfilter/nfnetlink.h> | |
55 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
56 | ||
57 | MODULE_LICENSE("GPL"); | |
58 | ||
dc808fe2 | 59 | static char __initdata version[] = "0.93"; |
c1d10adb | 60 | |
4054ff45 PNA |
61 | static int ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
62 | const struct nf_conntrack_tuple *tuple, | |
63 | struct nf_conntrack_l4proto *l4proto) | |
c1d10adb | 64 | { |
c1d10adb | 65 | int ret = 0; |
df6fb868 | 66 | struct nlattr *nest_parms; |
c1d10adb | 67 | |
df6fb868 PM |
68 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
69 | if (!nest_parms) | |
70 | goto nla_put_failure; | |
cc1eb431 DM |
71 | if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum)) |
72 | goto nla_put_failure; | |
c1d10adb | 73 | |
fdf70832 PM |
74 | if (likely(l4proto->tuple_to_nlattr)) |
75 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 76 | |
df6fb868 | 77 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
78 | |
79 | return ret; | |
80 | ||
df6fb868 | 81 | nla_put_failure: |
c1d10adb PNA |
82 | return -1; |
83 | } | |
84 | ||
4054ff45 PNA |
85 | static int ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
86 | const struct nf_conntrack_tuple *tuple, | |
87 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 88 | { |
c1d10adb | 89 | int ret = 0; |
df6fb868 PM |
90 | struct nlattr *nest_parms; |
91 | ||
92 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
93 | if (!nest_parms) | |
94 | goto nla_put_failure; | |
1cde6436 | 95 | |
fdf70832 PM |
96 | if (likely(l3proto->tuple_to_nlattr)) |
97 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 98 | |
df6fb868 | 99 | nla_nest_end(skb, nest_parms); |
c1d10adb | 100 | |
1cde6436 PNA |
101 | return ret; |
102 | ||
df6fb868 | 103 | nla_put_failure: |
1cde6436 PNA |
104 | return -1; |
105 | } | |
106 | ||
4054ff45 PNA |
107 | static int ctnetlink_dump_tuples(struct sk_buff *skb, |
108 | const struct nf_conntrack_tuple *tuple) | |
1cde6436 PNA |
109 | { |
110 | int ret; | |
111 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 112 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 113 | |
3b988ece | 114 | rcu_read_lock(); |
528a3a6f | 115 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 116 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb | 117 | |
3b988ece HS |
118 | if (ret >= 0) { |
119 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
120 | tuple->dst.protonum); | |
121 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); | |
122 | } | |
123 | rcu_read_unlock(); | |
c1d10adb | 124 | return ret; |
c1d10adb PNA |
125 | } |
126 | ||
4054ff45 PNA |
127 | static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype, |
128 | const struct nf_conntrack_zone *zone, int dir) | |
deedb590 DB |
129 | { |
130 | if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir) | |
131 | return 0; | |
132 | if (nla_put_be16(skb, attrtype, htons(zone->id))) | |
133 | goto nla_put_failure; | |
134 | return 0; | |
135 | ||
136 | nla_put_failure: | |
137 | return -1; | |
138 | } | |
139 | ||
4054ff45 | 140 | static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 141 | { |
cc1eb431 DM |
142 | if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status))) |
143 | goto nla_put_failure; | |
c1d10adb PNA |
144 | return 0; |
145 | ||
df6fb868 | 146 | nla_put_failure: |
c1d10adb PNA |
147 | return -1; |
148 | } | |
149 | ||
4054ff45 | 150 | static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 151 | { |
d0b35b93 | 152 | long timeout = nf_ct_expires(ct) / HZ; |
601e68e1 | 153 | |
cc1eb431 DM |
154 | if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout))) |
155 | goto nla_put_failure; | |
c1d10adb PNA |
156 | return 0; |
157 | ||
df6fb868 | 158 | nla_put_failure: |
c1d10adb PNA |
159 | return -1; |
160 | } | |
161 | ||
4054ff45 | 162 | static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 163 | { |
5e8fbe2a | 164 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 165 | struct nlattr *nest_proto; |
c1d10adb PNA |
166 | int ret; |
167 | ||
528a3a6f PNA |
168 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
169 | if (!l4proto->to_nlattr) | |
c1d10adb | 170 | return 0; |
601e68e1 | 171 | |
df6fb868 PM |
172 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
173 | if (!nest_proto) | |
174 | goto nla_put_failure; | |
c1d10adb | 175 | |
fdf70832 | 176 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 177 | |
df6fb868 | 178 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
179 | |
180 | return ret; | |
181 | ||
df6fb868 | 182 | nla_put_failure: |
c1d10adb PNA |
183 | return -1; |
184 | } | |
185 | ||
4054ff45 PNA |
186 | static int ctnetlink_dump_helpinfo(struct sk_buff *skb, |
187 | const struct nf_conn *ct) | |
c1d10adb | 188 | { |
df6fb868 | 189 | struct nlattr *nest_helper; |
dc808fe2 | 190 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 191 | struct nf_conntrack_helper *helper; |
c1d10adb | 192 | |
3c158f7f | 193 | if (!help) |
c1d10adb | 194 | return 0; |
601e68e1 | 195 | |
3c158f7f PM |
196 | helper = rcu_dereference(help->helper); |
197 | if (!helper) | |
198 | goto out; | |
199 | ||
df6fb868 PM |
200 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
201 | if (!nest_helper) | |
202 | goto nla_put_failure; | |
cc1eb431 DM |
203 | if (nla_put_string(skb, CTA_HELP_NAME, helper->name)) |
204 | goto nla_put_failure; | |
c1d10adb | 205 | |
fdf70832 PM |
206 | if (helper->to_nlattr) |
207 | helper->to_nlattr(skb, ct); | |
c1d10adb | 208 | |
df6fb868 | 209 | nla_nest_end(skb, nest_helper); |
3c158f7f | 210 | out: |
c1d10adb PNA |
211 | return 0; |
212 | ||
df6fb868 | 213 | nla_put_failure: |
c1d10adb PNA |
214 | return -1; |
215 | } | |
216 | ||
bb5cf80e | 217 | static int |
4542fa47 HE |
218 | dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct, |
219 | enum ip_conntrack_dir dir, int type) | |
c1d10adb | 220 | { |
4542fa47 HE |
221 | enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
222 | struct nf_conn_counter *counter = acct->counter; | |
df6fb868 | 223 | struct nlattr *nest_count; |
4542fa47 | 224 | u64 pkts, bytes; |
c1d10adb | 225 | |
4542fa47 HE |
226 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
227 | pkts = atomic64_xchg(&counter[dir].packets, 0); | |
228 | bytes = atomic64_xchg(&counter[dir].bytes, 0); | |
229 | } else { | |
230 | pkts = atomic64_read(&counter[dir].packets); | |
231 | bytes = atomic64_read(&counter[dir].bytes); | |
232 | } | |
233 | ||
234 | nest_count = nla_nest_start(skb, attr | NLA_F_NESTED); | |
df6fb868 PM |
235 | if (!nest_count) |
236 | goto nla_put_failure; | |
237 | ||
b46f6ded ND |
238 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts), |
239 | CTA_COUNTERS_PAD) || | |
240 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes), | |
241 | CTA_COUNTERS_PAD)) | |
cc1eb431 | 242 | goto nla_put_failure; |
c1d10adb | 243 | |
df6fb868 | 244 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
245 | |
246 | return 0; | |
247 | ||
df6fb868 | 248 | nla_put_failure: |
c1d10adb PNA |
249 | return -1; |
250 | } | |
c1d10adb | 251 | |
80e60e67 | 252 | static int |
4542fa47 | 253 | ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type) |
80e60e67 | 254 | { |
4542fa47 | 255 | struct nf_conn_acct *acct = nf_conn_acct_find(ct); |
80e60e67 | 256 | |
80e60e67 PNA |
257 | if (!acct) |
258 | return 0; | |
259 | ||
4542fa47 HE |
260 | if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0) |
261 | return -1; | |
262 | if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0) | |
263 | return -1; | |
264 | ||
265 | return 0; | |
80e60e67 PNA |
266 | } |
267 | ||
a992ca2a PNA |
268 | static int |
269 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) | |
270 | { | |
271 | struct nlattr *nest_count; | |
272 | const struct nf_conn_tstamp *tstamp; | |
273 | ||
274 | tstamp = nf_conn_tstamp_find(ct); | |
275 | if (!tstamp) | |
276 | return 0; | |
277 | ||
278 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); | |
279 | if (!nest_count) | |
280 | goto nla_put_failure; | |
281 | ||
b46f6ded ND |
282 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start), |
283 | CTA_TIMESTAMP_PAD) || | |
cc1eb431 | 284 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, |
b46f6ded ND |
285 | cpu_to_be64(tstamp->stop), |
286 | CTA_TIMESTAMP_PAD))) | |
cc1eb431 | 287 | goto nla_put_failure; |
a992ca2a PNA |
288 | nla_nest_end(skb, nest_count); |
289 | ||
290 | return 0; | |
291 | ||
292 | nla_put_failure: | |
293 | return -1; | |
294 | } | |
295 | ||
c1d10adb | 296 | #ifdef CONFIG_NF_CONNTRACK_MARK |
4054ff45 | 297 | static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 298 | { |
cc1eb431 DM |
299 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
300 | goto nla_put_failure; | |
c1d10adb PNA |
301 | return 0; |
302 | ||
df6fb868 | 303 | nla_put_failure: |
c1d10adb PNA |
304 | return -1; |
305 | } | |
306 | #else | |
307 | #define ctnetlink_dump_mark(a, b) (0) | |
308 | #endif | |
309 | ||
37fccd85 | 310 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
4054ff45 | 311 | static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) |
37fccd85 | 312 | { |
1cc63249 EP |
313 | struct nlattr *nest_secctx; |
314 | int len, ret; | |
315 | char *secctx; | |
316 | ||
317 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
318 | if (ret) | |
cba85b53 | 319 | return 0; |
1cc63249 EP |
320 | |
321 | ret = -1; | |
322 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); | |
323 | if (!nest_secctx) | |
324 | goto nla_put_failure; | |
37fccd85 | 325 | |
cc1eb431 DM |
326 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
327 | goto nla_put_failure; | |
1cc63249 EP |
328 | nla_nest_end(skb, nest_secctx); |
329 | ||
330 | ret = 0; | |
37fccd85 | 331 | nla_put_failure: |
1cc63249 EP |
332 | security_release_secctx(secctx, len); |
333 | return ret; | |
37fccd85 PNA |
334 | } |
335 | #else | |
1cc63249 | 336 | #define ctnetlink_dump_secctx(a, b) (0) |
37fccd85 PNA |
337 | #endif |
338 | ||
0ceabd83 | 339 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
4a96300c | 340 | static inline int ctnetlink_label_size(const struct nf_conn *ct) |
0ceabd83 FW |
341 | { |
342 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
343 | ||
344 | if (!labels) | |
345 | return 0; | |
23014011 | 346 | return nla_total_size(sizeof(labels->bits)); |
0ceabd83 FW |
347 | } |
348 | ||
349 | static int | |
350 | ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) | |
351 | { | |
352 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
23014011 | 353 | unsigned int i; |
0ceabd83 FW |
354 | |
355 | if (!labels) | |
356 | return 0; | |
357 | ||
0ceabd83 FW |
358 | i = 0; |
359 | do { | |
360 | if (labels->bits[i] != 0) | |
23014011 FW |
361 | return nla_put(skb, CTA_LABELS, sizeof(labels->bits), |
362 | labels->bits); | |
0ceabd83 | 363 | i++; |
23014011 | 364 | } while (i < ARRAY_SIZE(labels->bits)); |
0ceabd83 FW |
365 | |
366 | return 0; | |
367 | } | |
368 | #else | |
369 | #define ctnetlink_dump_labels(a, b) (0) | |
370 | #define ctnetlink_label_size(a) (0) | |
371 | #endif | |
372 | ||
0f417ce9 PNA |
373 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
374 | ||
4054ff45 | 375 | static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
0f417ce9 PNA |
376 | { |
377 | struct nlattr *nest_parms; | |
378 | ||
379 | if (!(ct->status & IPS_EXPECTED)) | |
380 | return 0; | |
381 | ||
382 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
383 | if (!nest_parms) | |
384 | goto nla_put_failure; | |
385 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
386 | goto nla_put_failure; | |
387 | nla_nest_end(skb, nest_parms); | |
388 | ||
389 | return 0; | |
390 | ||
391 | nla_put_failure: | |
392 | return -1; | |
393 | } | |
394 | ||
bb5cf80e | 395 | static int |
41d73ec0 | 396 | dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type) |
13eae15a | 397 | { |
13eae15a PNA |
398 | struct nlattr *nest_parms; |
399 | ||
400 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
401 | if (!nest_parms) | |
402 | goto nla_put_failure; | |
403 | ||
41d73ec0 PM |
404 | if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS, |
405 | htonl(seq->correction_pos)) || | |
406 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE, | |
407 | htonl(seq->offset_before)) || | |
408 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER, | |
409 | htonl(seq->offset_after))) | |
cc1eb431 | 410 | goto nla_put_failure; |
13eae15a PNA |
411 | |
412 | nla_nest_end(skb, nest_parms); | |
413 | ||
414 | return 0; | |
415 | ||
416 | nla_put_failure: | |
417 | return -1; | |
418 | } | |
419 | ||
4054ff45 PNA |
420 | static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, |
421 | const struct nf_conn *ct) | |
13eae15a | 422 | { |
41d73ec0 PM |
423 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
424 | struct nf_ct_seqadj *seq; | |
13eae15a | 425 | |
41d73ec0 | 426 | if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj) |
13eae15a PNA |
427 | return 0; |
428 | ||
41d73ec0 PM |
429 | seq = &seqadj->seq[IP_CT_DIR_ORIGINAL]; |
430 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1) | |
13eae15a PNA |
431 | return -1; |
432 | ||
41d73ec0 PM |
433 | seq = &seqadj->seq[IP_CT_DIR_REPLY]; |
434 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1) | |
13eae15a PNA |
435 | return -1; |
436 | ||
437 | return 0; | |
438 | } | |
13eae15a | 439 | |
4054ff45 | 440 | static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 441 | { |
cc1eb431 DM |
442 | if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct))) |
443 | goto nla_put_failure; | |
c1d10adb PNA |
444 | return 0; |
445 | ||
df6fb868 | 446 | nla_put_failure: |
c1d10adb PNA |
447 | return -1; |
448 | } | |
449 | ||
4054ff45 | 450 | static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 451 | { |
cc1eb431 DM |
452 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
453 | goto nla_put_failure; | |
c1d10adb PNA |
454 | return 0; |
455 | ||
df6fb868 | 456 | nla_put_failure: |
c1d10adb PNA |
457 | return -1; |
458 | } | |
459 | ||
c1d10adb | 460 | static int |
15e47304 | 461 | ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
80e60e67 | 462 | struct nf_conn *ct) |
c1d10adb | 463 | { |
308ac914 | 464 | const struct nf_conntrack_zone *zone; |
c1d10adb PNA |
465 | struct nlmsghdr *nlh; |
466 | struct nfgenmsg *nfmsg; | |
df6fb868 | 467 | struct nlattr *nest_parms; |
15e47304 | 468 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
c1d10adb | 469 | |
80e60e67 | 470 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW); |
15e47304 | 471 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
472 | if (nlh == NULL) |
473 | goto nlmsg_failure; | |
c1d10adb | 474 | |
96bcf938 | 475 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 476 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
477 | nfmsg->version = NFNETLINK_V0; |
478 | nfmsg->res_id = 0; | |
479 | ||
deedb590 DB |
480 | zone = nf_ct_zone(ct); |
481 | ||
df6fb868 PM |
482 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
483 | if (!nest_parms) | |
484 | goto nla_put_failure; | |
f2f3e38c | 485 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 | 486 | goto nla_put_failure; |
deedb590 DB |
487 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
488 | NF_CT_ZONE_DIR_ORIG) < 0) | |
489 | goto nla_put_failure; | |
df6fb868 | 490 | nla_nest_end(skb, nest_parms); |
601e68e1 | 491 | |
df6fb868 PM |
492 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
493 | if (!nest_parms) | |
494 | goto nla_put_failure; | |
f2f3e38c | 495 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 | 496 | goto nla_put_failure; |
deedb590 DB |
497 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
498 | NF_CT_ZONE_DIR_REPL) < 0) | |
499 | goto nla_put_failure; | |
df6fb868 | 500 | nla_nest_end(skb, nest_parms); |
c1d10adb | 501 | |
deedb590 DB |
502 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
503 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
cc1eb431 | 504 | goto nla_put_failure; |
ef00f89f | 505 | |
c1d10adb PNA |
506 | if (ctnetlink_dump_status(skb, ct) < 0 || |
507 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
4542fa47 | 508 | ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 509 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
c1d10adb PNA |
510 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
511 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
512 | ctnetlink_dump_mark(skb, ct) < 0 || | |
1cc63249 | 513 | ctnetlink_dump_secctx(skb, ct) < 0 || |
0ceabd83 | 514 | ctnetlink_dump_labels(skb, ct) < 0 || |
c1d10adb | 515 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 516 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 517 | ctnetlink_dump_master(skb, ct) < 0 || |
41d73ec0 | 518 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
df6fb868 | 519 | goto nla_put_failure; |
c1d10adb | 520 | |
96bcf938 | 521 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
522 | return skb->len; |
523 | ||
524 | nlmsg_failure: | |
df6fb868 | 525 | nla_put_failure: |
96bcf938 | 526 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
527 | return -1; |
528 | } | |
529 | ||
4a96300c | 530 | static inline size_t ctnetlink_proto_size(const struct nf_conn *ct) |
2732c4e4 HE |
531 | { |
532 | struct nf_conntrack_l3proto *l3proto; | |
533 | struct nf_conntrack_l4proto *l4proto; | |
03b64f51 PNA |
534 | size_t len = 0; |
535 | ||
536 | rcu_read_lock(); | |
537 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); | |
538 | len += l3proto->nla_size; | |
539 | ||
540 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
541 | len += l4proto->nla_size; | |
542 | rcu_read_unlock(); | |
543 | ||
544 | return len; | |
545 | } | |
546 | ||
4a96300c | 547 | static inline size_t ctnetlink_acct_size(const struct nf_conn *ct) |
d26e6a02 JP |
548 | { |
549 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) | |
550 | return 0; | |
551 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ | |
b46f6ded ND |
552 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
553 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
d26e6a02 JP |
554 | ; |
555 | } | |
556 | ||
4a96300c | 557 | static inline int ctnetlink_secctx_size(const struct nf_conn *ct) |
1cc63249 | 558 | { |
cba85b53 PNA |
559 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
560 | int len, ret; | |
1cc63249 | 561 | |
cba85b53 PNA |
562 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
563 | if (ret) | |
564 | return 0; | |
1cc63249 | 565 | |
cba85b53 PNA |
566 | return nla_total_size(0) /* CTA_SECCTX */ |
567 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ | |
568 | #else | |
569 | return 0; | |
1cc63249 | 570 | #endif |
cba85b53 | 571 | } |
1cc63249 | 572 | |
4a96300c | 573 | static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct) |
a992ca2a PNA |
574 | { |
575 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
576 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) | |
577 | return 0; | |
b46f6ded | 578 | return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t)); |
a992ca2a PNA |
579 | #else |
580 | return 0; | |
581 | #endif | |
582 | } | |
583 | ||
4054ff45 PNA |
584 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
585 | static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
03b64f51 PNA |
586 | { |
587 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
588 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
589 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
590 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
591 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
592 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
593 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
f7b13e43 | 594 | + ctnetlink_acct_size(ct) |
a992ca2a | 595 | + ctnetlink_timestamp_size(ct) |
03b64f51 PNA |
596 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
597 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
598 | + nla_total_size(0) /* CTA_HELP */ | |
599 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
cba85b53 | 600 | + ctnetlink_secctx_size(ct) |
d271e8bd | 601 | #ifdef CONFIG_NF_NAT_NEEDED |
03b64f51 PNA |
602 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
603 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
604 | #endif |
605 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 606 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
4a001068 KM |
607 | #endif |
608 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
deedb590 | 609 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
d271e8bd | 610 | #endif |
03b64f51 | 611 | + ctnetlink_proto_size(ct) |
0ceabd83 | 612 | + ctnetlink_label_size(ct) |
03b64f51 | 613 | ; |
2732c4e4 HE |
614 | } |
615 | ||
e34d5c1a PNA |
616 | static int |
617 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb | 618 | { |
308ac914 | 619 | const struct nf_conntrack_zone *zone; |
9592a5c0 | 620 | struct net *net; |
c1d10adb PNA |
621 | struct nlmsghdr *nlh; |
622 | struct nfgenmsg *nfmsg; | |
df6fb868 | 623 | struct nlattr *nest_parms; |
19abb7b0 | 624 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
625 | struct sk_buff *skb; |
626 | unsigned int type; | |
c1d10adb | 627 | unsigned int flags = 0, group; |
dd7669a9 | 628 | int err; |
c1d10adb PNA |
629 | |
630 | /* ignore our fake conntrack entry */ | |
5bfddbd4 | 631 | if (nf_ct_is_untracked(ct)) |
e34d5c1a | 632 | return 0; |
c1d10adb | 633 | |
a0891aa6 | 634 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
635 | type = IPCTNL_MSG_CT_DELETE; |
636 | group = NFNLGRP_CONNTRACK_DESTROY; | |
a0891aa6 | 637 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
638 | type = IPCTNL_MSG_CT_NEW; |
639 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 640 | group = NFNLGRP_CONNTRACK_NEW; |
17e6e4ea | 641 | } else if (events) { |
c1d10adb PNA |
642 | type = IPCTNL_MSG_CT_NEW; |
643 | group = NFNLGRP_CONNTRACK_UPDATE; | |
644 | } else | |
e34d5c1a | 645 | return 0; |
a2427692 | 646 | |
9592a5c0 AD |
647 | net = nf_ct_net(ct); |
648 | if (!item->report && !nfnetlink_has_listeners(net, group)) | |
e34d5c1a | 649 | return 0; |
a2427692 | 650 | |
03b64f51 PNA |
651 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
652 | if (skb == NULL) | |
150ace0d | 653 | goto errout; |
c1d10adb | 654 | |
c1d10adb | 655 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
15e47304 | 656 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
657 | if (nlh == NULL) |
658 | goto nlmsg_failure; | |
c1d10adb | 659 | |
96bcf938 | 660 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 661 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
662 | nfmsg->version = NFNETLINK_V0; |
663 | nfmsg->res_id = 0; | |
664 | ||
528a3a6f | 665 | rcu_read_lock(); |
deedb590 DB |
666 | zone = nf_ct_zone(ct); |
667 | ||
df6fb868 PM |
668 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
669 | if (!nest_parms) | |
670 | goto nla_put_failure; | |
f2f3e38c | 671 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 | 672 | goto nla_put_failure; |
deedb590 DB |
673 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
674 | NF_CT_ZONE_DIR_ORIG) < 0) | |
675 | goto nla_put_failure; | |
df6fb868 | 676 | nla_nest_end(skb, nest_parms); |
601e68e1 | 677 | |
df6fb868 PM |
678 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
679 | if (!nest_parms) | |
680 | goto nla_put_failure; | |
f2f3e38c | 681 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 | 682 | goto nla_put_failure; |
deedb590 DB |
683 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
684 | NF_CT_ZONE_DIR_REPL) < 0) | |
685 | goto nla_put_failure; | |
df6fb868 | 686 | nla_nest_end(skb, nest_parms); |
c1d10adb | 687 | |
deedb590 DB |
688 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
689 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
cc1eb431 | 690 | goto nla_put_failure; |
ef00f89f | 691 | |
1eedf699 EL |
692 | if (ctnetlink_dump_id(skb, ct) < 0) |
693 | goto nla_put_failure; | |
694 | ||
e57dce60 FH |
695 | if (ctnetlink_dump_status(skb, ct) < 0) |
696 | goto nla_put_failure; | |
697 | ||
a0891aa6 | 698 | if (events & (1 << IPCT_DESTROY)) { |
4542fa47 | 699 | if (ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 700 | ctnetlink_dump_timestamp(skb, ct) < 0) |
df6fb868 | 701 | goto nla_put_failure; |
7b621c1e | 702 | } else { |
7b621c1e | 703 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 704 | goto nla_put_failure; |
7b621c1e | 705 | |
a0891aa6 | 706 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 707 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 708 | goto nla_put_failure; |
7b621c1e | 709 | |
a0891aa6 | 710 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 711 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 712 | goto nla_put_failure; |
7b621c1e | 713 | |
ff660c80 | 714 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 715 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
1cc63249 | 716 | && ctnetlink_dump_secctx(skb, ct) < 0) |
37fccd85 | 717 | goto nla_put_failure; |
ff660c80 | 718 | #endif |
0ceabd83 FW |
719 | if (events & (1 << IPCT_LABEL) && |
720 | ctnetlink_dump_labels(skb, ct) < 0) | |
721 | goto nla_put_failure; | |
7b621c1e | 722 | |
a0891aa6 | 723 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
724 | ctnetlink_dump_master(skb, ct) < 0) |
725 | goto nla_put_failure; | |
726 | ||
41d73ec0 PM |
727 | if (events & (1 << IPCT_SEQADJ) && |
728 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) | |
13eae15a | 729 | goto nla_put_failure; |
7b621c1e | 730 | } |
b9a37e0c | 731 | |
a83099a6 | 732 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 733 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
734 | && ctnetlink_dump_mark(skb, ct) < 0) |
735 | goto nla_put_failure; | |
736 | #endif | |
528a3a6f | 737 | rcu_read_unlock(); |
a83099a6 | 738 | |
96bcf938 | 739 | nlmsg_end(skb, nlh); |
15e47304 | 740 | err = nfnetlink_send(skb, net, item->portid, group, item->report, |
cd8c20b6 | 741 | GFP_ATOMIC); |
dd7669a9 PNA |
742 | if (err == -ENOBUFS || err == -EAGAIN) |
743 | return -ENOBUFS; | |
744 | ||
e34d5c1a | 745 | return 0; |
c1d10adb | 746 | |
df6fb868 | 747 | nla_put_failure: |
528a3a6f | 748 | rcu_read_unlock(); |
96bcf938 | 749 | nlmsg_cancel(skb, nlh); |
528a3a6f | 750 | nlmsg_failure: |
c1d10adb | 751 | kfree_skb(skb); |
150ace0d | 752 | errout: |
37b7ef72 PNA |
753 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
754 | return -ENOBUFS; | |
755 | ||
e34d5c1a | 756 | return 0; |
c1d10adb PNA |
757 | } |
758 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
759 | ||
760 | static int ctnetlink_done(struct netlink_callback *cb) | |
761 | { | |
89f2e218 PM |
762 | if (cb->args[1]) |
763 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
397304b5 | 764 | kfree(cb->data); |
c1d10adb PNA |
765 | return 0; |
766 | } | |
767 | ||
866476f3 | 768 | struct ctnetlink_filter { |
0f298a28 PNA |
769 | struct { |
770 | u_int32_t val; | |
771 | u_int32_t mask; | |
772 | } mark; | |
773 | }; | |
774 | ||
866476f3 KE |
775 | static struct ctnetlink_filter * |
776 | ctnetlink_alloc_filter(const struct nlattr * const cda[]) | |
777 | { | |
778 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
779 | struct ctnetlink_filter *filter; | |
780 | ||
781 | filter = kzalloc(sizeof(*filter), GFP_KERNEL); | |
782 | if (filter == NULL) | |
783 | return ERR_PTR(-ENOMEM); | |
784 | ||
785 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); | |
786 | filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
787 | ||
788 | return filter; | |
789 | #else | |
790 | return ERR_PTR(-EOPNOTSUPP); | |
791 | #endif | |
792 | } | |
793 | ||
794 | static int ctnetlink_filter_match(struct nf_conn *ct, void *data) | |
795 | { | |
796 | struct ctnetlink_filter *filter = data; | |
797 | ||
798 | if (filter == NULL) | |
799 | return 1; | |
800 | ||
801 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
802 | if ((ct->mark & filter->mark.mask) == filter->mark.val) | |
803 | return 1; | |
804 | #endif | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
c1d10adb PNA |
809 | static int |
810 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
811 | { | |
9592a5c0 | 812 | struct net *net = sock_net(skb->sk); |
89f2e218 | 813 | struct nf_conn *ct, *last; |
c1d10adb | 814 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 815 | struct hlist_nulls_node *n; |
96bcf938 | 816 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 817 | u_int8_t l3proto = nfmsg->nfgen_family; |
3b988ece | 818 | int res; |
93bb0ceb JDB |
819 | spinlock_t *lockp; |
820 | ||
d205dc40 | 821 | last = (struct nf_conn *)cb->args[1]; |
93bb0ceb JDB |
822 | |
823 | local_bh_disable(); | |
56d52d48 | 824 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
89f2e218 | 825 | restart: |
93bb0ceb | 826 | lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS]; |
b16c2919 | 827 | nf_conntrack_lock(lockp); |
56d52d48 | 828 | if (cb->args[0] >= nf_conntrack_htable_size) { |
93bb0ceb JDB |
829 | spin_unlock(lockp); |
830 | goto out; | |
831 | } | |
56d52d48 FW |
832 | hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]], |
833 | hnnode) { | |
5b1158e9 | 834 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
835 | continue; |
836 | ct = nf_ct_tuplehash_to_ctrack(h); | |
e0c7d472 FW |
837 | if (!net_eq(net, nf_ct_net(ct))) |
838 | continue; | |
839 | ||
87711cb8 PNA |
840 | /* Dump entries of a given L3 protocol number. |
841 | * If it is not specified, ie. l3proto == 0, | |
842 | * then dump everything. */ | |
5e8fbe2a | 843 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
13ee6ac5 | 844 | continue; |
d205dc40 PM |
845 | if (cb->args[1]) { |
846 | if (ct != last) | |
13ee6ac5 | 847 | continue; |
d205dc40 | 848 | cb->args[1] = 0; |
89f2e218 | 849 | } |
866476f3 | 850 | if (!ctnetlink_filter_match(ct, cb->data)) |
0f298a28 | 851 | continue; |
866476f3 | 852 | |
3b988ece HS |
853 | rcu_read_lock(); |
854 | res = | |
15e47304 | 855 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
3b988ece HS |
856 | cb->nlh->nlmsg_seq, |
857 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
858 | ct); | |
859 | rcu_read_unlock(); | |
860 | if (res < 0) { | |
c71caf41 | 861 | nf_conntrack_get(&ct->ct_general); |
89f2e218 | 862 | cb->args[1] = (unsigned long)ct; |
93bb0ceb | 863 | spin_unlock(lockp); |
c1d10adb | 864 | goto out; |
89f2e218 PM |
865 | } |
866 | } | |
93bb0ceb | 867 | spin_unlock(lockp); |
d205dc40 | 868 | if (cb->args[1]) { |
89f2e218 PM |
869 | cb->args[1] = 0; |
870 | goto restart; | |
c1d10adb PNA |
871 | } |
872 | } | |
89f2e218 | 873 | out: |
93bb0ceb | 874 | local_bh_enable(); |
d205dc40 PM |
875 | if (last) |
876 | nf_ct_put(last); | |
c1d10adb | 877 | |
c1d10adb PNA |
878 | return skb->len; |
879 | } | |
880 | ||
4054ff45 PNA |
881 | static int ctnetlink_parse_tuple_ip(struct nlattr *attr, |
882 | struct nf_conntrack_tuple *tuple) | |
c1d10adb | 883 | { |
df6fb868 | 884 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
885 | struct nf_conntrack_l3proto *l3proto; |
886 | int ret = 0; | |
887 | ||
130ffbc2 DB |
888 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
889 | if (ret < 0) | |
890 | return ret; | |
c1d10adb | 891 | |
cd91566e FW |
892 | rcu_read_lock(); |
893 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 894 | |
f73e924c PM |
895 | if (likely(l3proto->nlattr_to_tuple)) { |
896 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
897 | l3proto->nla_policy); | |
898 | if (ret == 0) | |
899 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
900 | } | |
c1d10adb | 901 | |
cd91566e | 902 | rcu_read_unlock(); |
c1d10adb | 903 | |
c1d10adb PNA |
904 | return ret; |
905 | } | |
906 | ||
f73e924c PM |
907 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
908 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
909 | }; |
910 | ||
4054ff45 PNA |
911 | static int ctnetlink_parse_tuple_proto(struct nlattr *attr, |
912 | struct nf_conntrack_tuple *tuple) | |
c1d10adb | 913 | { |
df6fb868 | 914 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 915 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
916 | int ret = 0; |
917 | ||
f73e924c PM |
918 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
919 | if (ret < 0) | |
920 | return ret; | |
c1d10adb | 921 | |
df6fb868 | 922 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 923 | return -EINVAL; |
77236b6e | 924 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 925 | |
cd91566e FW |
926 | rcu_read_lock(); |
927 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 928 | |
f73e924c PM |
929 | if (likely(l4proto->nlattr_to_tuple)) { |
930 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
931 | l4proto->nla_policy); | |
932 | if (ret == 0) | |
933 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
934 | } | |
c1d10adb | 935 | |
cd91566e | 936 | rcu_read_unlock(); |
601e68e1 | 937 | |
c1d10adb PNA |
938 | return ret; |
939 | } | |
940 | ||
deedb590 DB |
941 | static int |
942 | ctnetlink_parse_zone(const struct nlattr *attr, | |
943 | struct nf_conntrack_zone *zone) | |
944 | { | |
5e8018fc DB |
945 | nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID, |
946 | NF_CT_DEFAULT_ZONE_DIR, 0); | |
deedb590 DB |
947 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
948 | if (attr) | |
949 | zone->id = ntohs(nla_get_be16(attr)); | |
950 | #else | |
951 | if (attr) | |
952 | return -EOPNOTSUPP; | |
953 | #endif | |
954 | return 0; | |
955 | } | |
956 | ||
957 | static int | |
958 | ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type, | |
959 | struct nf_conntrack_zone *zone) | |
960 | { | |
961 | int ret; | |
962 | ||
963 | if (zone->id != NF_CT_DEFAULT_ZONE_ID) | |
964 | return -EINVAL; | |
965 | ||
966 | ret = ctnetlink_parse_zone(attr, zone); | |
967 | if (ret < 0) | |
968 | return ret; | |
969 | ||
970 | if (type == CTA_TUPLE_REPLY) | |
971 | zone->dir = NF_CT_ZONE_DIR_REPL; | |
972 | else | |
973 | zone->dir = NF_CT_ZONE_DIR_ORIG; | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
d0b0268f PM |
978 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
979 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
980 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
deedb590 | 981 | [CTA_TUPLE_ZONE] = { .type = NLA_U16 }, |
d0b0268f PM |
982 | }; |
983 | ||
bb5cf80e | 984 | static int |
39938324 PM |
985 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
986 | struct nf_conntrack_tuple *tuple, | |
deedb590 DB |
987 | enum ctattr_type type, u_int8_t l3num, |
988 | struct nf_conntrack_zone *zone) | |
c1d10adb | 989 | { |
df6fb868 | 990 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
991 | int err; |
992 | ||
c1d10adb PNA |
993 | memset(tuple, 0, sizeof(*tuple)); |
994 | ||
130ffbc2 DB |
995 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
996 | if (err < 0) | |
997 | return err; | |
c1d10adb | 998 | |
df6fb868 | 999 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
1000 | return -EINVAL; |
1001 | ||
1002 | tuple->src.l3num = l3num; | |
1003 | ||
df6fb868 | 1004 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
1005 | if (err < 0) |
1006 | return err; | |
1007 | ||
df6fb868 | 1008 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
1009 | return -EINVAL; |
1010 | ||
df6fb868 | 1011 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
1012 | if (err < 0) |
1013 | return err; | |
1014 | ||
deedb590 DB |
1015 | if (tb[CTA_TUPLE_ZONE]) { |
1016 | if (!zone) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE], | |
1020 | type, zone); | |
1021 | if (err < 0) | |
1022 | return err; | |
1023 | } | |
1024 | ||
c1d10adb PNA |
1025 | /* orig and expect tuples get DIR_ORIGINAL */ |
1026 | if (type == CTA_TUPLE_REPLY) | |
1027 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
1028 | else | |
1029 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
1030 | ||
c1d10adb PNA |
1031 | return 0; |
1032 | } | |
1033 | ||
d0b0268f | 1034 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
6d1fafca FW |
1035 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
1036 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
d0b0268f PM |
1037 | }; |
1038 | ||
4054ff45 PNA |
1039 | static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
1040 | struct nlattr **helpinfo) | |
c1d10adb | 1041 | { |
130ffbc2 | 1042 | int err; |
df6fb868 | 1043 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 1044 | |
130ffbc2 DB |
1045 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
1046 | if (err < 0) | |
1047 | return err; | |
c1d10adb | 1048 | |
df6fb868 | 1049 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
1050 | return -EINVAL; |
1051 | ||
df6fb868 | 1052 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb | 1053 | |
ae243bee PNA |
1054 | if (tb[CTA_HELP_INFO]) |
1055 | *helpinfo = tb[CTA_HELP_INFO]; | |
1056 | ||
c1d10adb PNA |
1057 | return 0; |
1058 | } | |
1059 | ||
f73e924c | 1060 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
1061 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
1062 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 1063 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
1064 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
1065 | [CTA_HELP] = { .type = NLA_NESTED }, | |
1066 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
1067 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
1068 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 1069 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
1070 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
1071 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
6d1fafca FW |
1072 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
1073 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, | |
ef00f89f | 1074 | [CTA_ZONE] = { .type = NLA_U16 }, |
0f298a28 | 1075 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
9b21f6a9 | 1076 | [CTA_LABELS] = { .type = NLA_BINARY, |
d2bf2f34 | 1077 | .len = NF_CT_LABELS_MAX_SIZE }, |
9b21f6a9 | 1078 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, |
d2bf2f34 | 1079 | .len = NF_CT_LABELS_MAX_SIZE }, |
c1d10adb PNA |
1080 | }; |
1081 | ||
866476f3 KE |
1082 | static int ctnetlink_flush_conntrack(struct net *net, |
1083 | const struct nlattr * const cda[], | |
1084 | u32 portid, int report) | |
1085 | { | |
1086 | struct ctnetlink_filter *filter = NULL; | |
1087 | ||
1088 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { | |
1089 | filter = ctnetlink_alloc_filter(cda); | |
1090 | if (IS_ERR(filter)) | |
1091 | return PTR_ERR(filter); | |
1092 | } | |
1093 | ||
1094 | nf_ct_iterate_cleanup(net, ctnetlink_filter_match, filter, | |
1095 | portid, report); | |
1096 | kfree(filter); | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
7b8002a1 PNA |
1101 | static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl, |
1102 | struct sk_buff *skb, | |
1103 | const struct nlmsghdr *nlh, | |
1104 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1105 | { |
1106 | struct nf_conntrack_tuple_hash *h; | |
1107 | struct nf_conntrack_tuple tuple; | |
1108 | struct nf_conn *ct; | |
96bcf938 | 1109 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1110 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 1111 | struct nf_conntrack_zone zone; |
ef00f89f PM |
1112 | int err; |
1113 | ||
1114 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1115 | if (err < 0) | |
1116 | return err; | |
c1d10adb | 1117 | |
df6fb868 | 1118 | if (cda[CTA_TUPLE_ORIG]) |
deedb590 DB |
1119 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
1120 | u3, &zone); | |
df6fb868 | 1121 | else if (cda[CTA_TUPLE_REPLY]) |
deedb590 DB |
1122 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
1123 | u3, &zone); | |
c1d10adb | 1124 | else { |
866476f3 KE |
1125 | return ctnetlink_flush_conntrack(net, cda, |
1126 | NETLINK_CB(skb).portid, | |
1127 | nlmsg_report(nlh)); | |
c1d10adb PNA |
1128 | } |
1129 | ||
1130 | if (err < 0) | |
1131 | return err; | |
1132 | ||
308ac914 | 1133 | h = nf_conntrack_find_get(net, &zone, &tuple); |
9ea8cfd6 | 1134 | if (!h) |
c1d10adb | 1135 | return -ENOENT; |
c1d10adb PNA |
1136 | |
1137 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 1138 | |
df6fb868 | 1139 | if (cda[CTA_ID]) { |
77236b6e | 1140 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 1141 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
1142 | nf_ct_put(ct); |
1143 | return -ENOENT; | |
1144 | } | |
601e68e1 | 1145 | } |
c1d10adb | 1146 | |
f330a7fd | 1147 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); |
c1d10adb | 1148 | nf_ct_put(ct); |
c1d10adb PNA |
1149 | |
1150 | return 0; | |
1151 | } | |
1152 | ||
7b8002a1 PNA |
1153 | static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl, |
1154 | struct sk_buff *skb, | |
1155 | const struct nlmsghdr *nlh, | |
1156 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1157 | { |
1158 | struct nf_conntrack_tuple_hash *h; | |
1159 | struct nf_conntrack_tuple tuple; | |
1160 | struct nf_conn *ct; | |
1161 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 1162 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1163 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 1164 | struct nf_conntrack_zone zone; |
ef00f89f | 1165 | int err; |
c1d10adb | 1166 | |
80d326fa PNA |
1167 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
1168 | struct netlink_dump_control c = { | |
1169 | .dump = ctnetlink_dump_table, | |
1170 | .done = ctnetlink_done, | |
1171 | }; | |
866476f3 | 1172 | |
0f298a28 | 1173 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
866476f3 | 1174 | struct ctnetlink_filter *filter; |
0f298a28 | 1175 | |
866476f3 KE |
1176 | filter = ctnetlink_alloc_filter(cda); |
1177 | if (IS_ERR(filter)) | |
1178 | return PTR_ERR(filter); | |
0f298a28 | 1179 | |
0f298a28 PNA |
1180 | c.data = filter; |
1181 | } | |
80d326fa PNA |
1182 | return netlink_dump_start(ctnl, skb, nlh, &c); |
1183 | } | |
c1d10adb | 1184 | |
ef00f89f PM |
1185 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
1186 | if (err < 0) | |
1187 | return err; | |
1188 | ||
df6fb868 | 1189 | if (cda[CTA_TUPLE_ORIG]) |
deedb590 DB |
1190 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
1191 | u3, &zone); | |
df6fb868 | 1192 | else if (cda[CTA_TUPLE_REPLY]) |
deedb590 DB |
1193 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
1194 | u3, &zone); | |
c1d10adb PNA |
1195 | else |
1196 | return -EINVAL; | |
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; |
9ea8cfd6 | 1204 | |
c1d10adb PNA |
1205 | ct = nf_ct_tuplehash_to_ctrack(h); |
1206 | ||
1207 | err = -ENOMEM; | |
96bcf938 PNA |
1208 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1209 | if (skb2 == NULL) { | |
c1d10adb PNA |
1210 | nf_ct_put(ct); |
1211 | return -ENOMEM; | |
1212 | } | |
c1d10adb | 1213 | |
528a3a6f | 1214 | rcu_read_lock(); |
15e47304 | 1215 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, |
80e60e67 | 1216 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
528a3a6f | 1217 | rcu_read_unlock(); |
c1d10adb PNA |
1218 | nf_ct_put(ct); |
1219 | if (err <= 0) | |
1220 | goto free; | |
1221 | ||
15e47304 | 1222 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
c1d10adb PNA |
1223 | if (err < 0) |
1224 | goto out; | |
1225 | ||
c1d10adb PNA |
1226 | return 0; |
1227 | ||
1228 | free: | |
1229 | kfree_skb(skb2); | |
1230 | out: | |
f31e8d49 PNA |
1231 | /* this avoids a loop in nfnetlink. */ |
1232 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
1233 | } |
1234 | ||
d871befe PNA |
1235 | static int ctnetlink_done_list(struct netlink_callback *cb) |
1236 | { | |
1237 | if (cb->args[1]) | |
1238 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static int | |
b7779d06 | 1243 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying) |
d871befe | 1244 | { |
cd5f336f | 1245 | struct nf_conn *ct, *last; |
d871befe PNA |
1246 | struct nf_conntrack_tuple_hash *h; |
1247 | struct hlist_nulls_node *n; | |
1248 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
1249 | u_int8_t l3proto = nfmsg->nfgen_family; | |
1250 | int res; | |
b7779d06 JDB |
1251 | int cpu; |
1252 | struct hlist_nulls_head *list; | |
1253 | struct net *net = sock_net(skb->sk); | |
d871befe PNA |
1254 | |
1255 | if (cb->args[2]) | |
1256 | return 0; | |
1257 | ||
cd5f336f FW |
1258 | last = (struct nf_conn *)cb->args[1]; |
1259 | ||
b7779d06 JDB |
1260 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
1261 | struct ct_pcpu *pcpu; | |
1262 | ||
1263 | if (!cpu_possible(cpu)) | |
d871befe | 1264 | continue; |
b7779d06 JDB |
1265 | |
1266 | pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu); | |
1267 | spin_lock_bh(&pcpu->lock); | |
b7779d06 JDB |
1268 | list = dying ? &pcpu->dying : &pcpu->unconfirmed; |
1269 | restart: | |
1270 | hlist_nulls_for_each_entry(h, n, list, hnnode) { | |
1271 | ct = nf_ct_tuplehash_to_ctrack(h); | |
1272 | if (l3proto && nf_ct_l3num(ct) != l3proto) | |
d871befe | 1273 | continue; |
b7779d06 JDB |
1274 | if (cb->args[1]) { |
1275 | if (ct != last) | |
1276 | continue; | |
1277 | cb->args[1] = 0; | |
1278 | } | |
1279 | rcu_read_lock(); | |
1280 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
1281 | cb->nlh->nlmsg_seq, | |
1282 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
1283 | ct); | |
1284 | rcu_read_unlock(); | |
1285 | if (res < 0) { | |
cd5f336f FW |
1286 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
1287 | continue; | |
266155b2 | 1288 | cb->args[0] = cpu; |
b7779d06 JDB |
1289 | cb->args[1] = (unsigned long)ct; |
1290 | spin_unlock_bh(&pcpu->lock); | |
1291 | goto out; | |
1292 | } | |
d871befe | 1293 | } |
b7779d06 JDB |
1294 | if (cb->args[1]) { |
1295 | cb->args[1] = 0; | |
1296 | goto restart; | |
266155b2 | 1297 | } |
b7779d06 | 1298 | spin_unlock_bh(&pcpu->lock); |
d871befe | 1299 | } |
266155b2 | 1300 | cb->args[2] = 1; |
d871befe | 1301 | out: |
d871befe PNA |
1302 | if (last) |
1303 | nf_ct_put(last); | |
1304 | ||
1305 | return skb->len; | |
1306 | } | |
1307 | ||
1308 | static int | |
1309 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) | |
1310 | { | |
b7779d06 | 1311 | return ctnetlink_dump_list(skb, cb, true); |
d871befe PNA |
1312 | } |
1313 | ||
7b8002a1 PNA |
1314 | static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl, |
1315 | struct sk_buff *skb, | |
1316 | const struct nlmsghdr *nlh, | |
1317 | const struct nlattr * const cda[]) | |
d871befe PNA |
1318 | { |
1319 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1320 | struct netlink_dump_control c = { | |
1321 | .dump = ctnetlink_dump_dying, | |
1322 | .done = ctnetlink_done_list, | |
1323 | }; | |
1324 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1325 | } | |
1326 | ||
1327 | return -EOPNOTSUPP; | |
1328 | } | |
1329 | ||
1330 | static int | |
1331 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) | |
1332 | { | |
b7779d06 | 1333 | return ctnetlink_dump_list(skb, cb, false); |
d871befe PNA |
1334 | } |
1335 | ||
7b8002a1 PNA |
1336 | static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl, |
1337 | struct sk_buff *skb, | |
1338 | const struct nlmsghdr *nlh, | |
1339 | const struct nlattr * const cda[]) | |
d871befe PNA |
1340 | { |
1341 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1342 | struct netlink_dump_control c = { | |
1343 | .dump = ctnetlink_dump_unconfirmed, | |
1344 | .done = ctnetlink_done_list, | |
1345 | }; | |
1346 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1347 | } | |
1348 | ||
1349 | return -EOPNOTSUPP; | |
1350 | } | |
1351 | ||
67671841 | 1352 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
1353 | static int |
1354 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
1355 | enum nf_nat_manip_type manip, | |
39938324 | 1356 | const struct nlattr *attr) |
e6a7d3c0 PNA |
1357 | { |
1358 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
c7232c99 | 1359 | int err; |
e6a7d3c0 PNA |
1360 | |
1361 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
1362 | if (!parse_nat_setup) { | |
95a5afca | 1363 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 1364 | rcu_read_unlock(); |
c14b78e7 | 1365 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1366 | if (request_module("nf-nat") < 0) { |
c14b78e7 | 1367 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1368 | rcu_read_lock(); |
1369 | return -EOPNOTSUPP; | |
1370 | } | |
c14b78e7 | 1371 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1372 | rcu_read_lock(); |
1373 | if (nfnetlink_parse_nat_setup_hook) | |
1374 | return -EAGAIN; | |
1375 | #endif | |
1376 | return -EOPNOTSUPP; | |
1377 | } | |
1378 | ||
c7232c99 PM |
1379 | err = parse_nat_setup(ct, manip, attr); |
1380 | if (err == -EAGAIN) { | |
1381 | #ifdef CONFIG_MODULES | |
1382 | rcu_read_unlock(); | |
c14b78e7 | 1383 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1384 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
c14b78e7 | 1385 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1386 | rcu_read_lock(); |
1387 | return -EOPNOTSUPP; | |
1388 | } | |
c14b78e7 | 1389 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1390 | rcu_read_lock(); |
1391 | #else | |
1392 | err = -EOPNOTSUPP; | |
1393 | #endif | |
1394 | } | |
1395 | return err; | |
e6a7d3c0 | 1396 | } |
67671841 | 1397 | #endif |
e6a7d3c0 | 1398 | |
bb5cf80e | 1399 | static int |
39938324 | 1400 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1401 | { |
1402 | unsigned long d; | |
77236b6e | 1403 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
1404 | d = ct->status ^ status; |
1405 | ||
1406 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
1407 | /* unchangeable */ | |
0adf9d67 | 1408 | return -EBUSY; |
601e68e1 | 1409 | |
c1d10adb PNA |
1410 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
1411 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 1412 | return -EBUSY; |
601e68e1 | 1413 | |
c1d10adb PNA |
1414 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
1415 | /* ASSURED bit can only be set */ | |
0adf9d67 | 1416 | return -EBUSY; |
c1d10adb | 1417 | |
c1d10adb PNA |
1418 | /* Be careful here, modifying NAT bits can screw up things, |
1419 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 1420 | * nf_nat_range. */ |
c1d10adb PNA |
1421 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
1422 | return 0; | |
1423 | } | |
1424 | ||
e6a7d3c0 | 1425 | static int |
0eba801b | 1426 | ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1427 | { |
1428 | #ifdef CONFIG_NF_NAT_NEEDED | |
1429 | int ret; | |
1430 | ||
fe337ac2 FW |
1431 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
1432 | return 0; | |
1433 | ||
0eba801b PNA |
1434 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST, |
1435 | cda[CTA_NAT_DST]); | |
1436 | if (ret < 0) | |
1437 | return ret; | |
1438 | ||
1439 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC, | |
1440 | cda[CTA_NAT_SRC]); | |
1441 | return ret; | |
e6a7d3c0 | 1442 | #else |
0eba801b PNA |
1443 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
1444 | return 0; | |
e6a7d3c0 PNA |
1445 | return -EOPNOTSUPP; |
1446 | #endif | |
1447 | } | |
c1d10adb | 1448 | |
4054ff45 PNA |
1449 | static int ctnetlink_change_helper(struct nf_conn *ct, |
1450 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1451 | { |
1452 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1453 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1454 | char *helpname = NULL; |
ae243bee | 1455 | struct nlattr *helpinfo = NULL; |
c1d10adb PNA |
1456 | int err; |
1457 | ||
c1d10adb PNA |
1458 | /* don't change helper of sibling connections */ |
1459 | if (ct->master) | |
0adf9d67 | 1460 | return -EBUSY; |
c1d10adb | 1461 | |
ae243bee | 1462 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
c1d10adb PNA |
1463 | if (err < 0) |
1464 | return err; | |
1465 | ||
df293bbb YK |
1466 | if (!strcmp(helpname, "")) { |
1467 | if (help && help->helper) { | |
c1d10adb PNA |
1468 | /* we had a helper before ... */ |
1469 | nf_ct_remove_expectations(ct); | |
a9b3cd7f | 1470 | RCU_INIT_POINTER(help->helper, NULL); |
c1d10adb | 1471 | } |
df293bbb YK |
1472 | |
1473 | return 0; | |
c1d10adb | 1474 | } |
601e68e1 | 1475 | |
794e6871 PM |
1476 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1477 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1478 | if (helper == NULL) { |
1479 | #ifdef CONFIG_MODULES | |
ca7433df | 1480 | spin_unlock_bh(&nf_conntrack_expect_lock); |
226c0c0e PNA |
1481 | |
1482 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
ca7433df | 1483 | spin_lock_bh(&nf_conntrack_expect_lock); |
226c0c0e PNA |
1484 | return -EOPNOTSUPP; |
1485 | } | |
1486 | ||
ca7433df | 1487 | spin_lock_bh(&nf_conntrack_expect_lock); |
794e6871 PM |
1488 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1489 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1490 | if (helper) |
1491 | return -EAGAIN; | |
1492 | #endif | |
0adf9d67 | 1493 | return -EOPNOTSUPP; |
226c0c0e | 1494 | } |
df293bbb | 1495 | |
ceceae1b | 1496 | if (help) { |
ae243bee PNA |
1497 | if (help->helper == helper) { |
1498 | /* update private helper data if allowed. */ | |
7be54ca4 | 1499 | if (helper->from_nlattr) |
ae243bee | 1500 | helper->from_nlattr(helpinfo, ct); |
ceceae1b | 1501 | return 0; |
fd7462de | 1502 | } else |
ceceae1b | 1503 | return -EBUSY; |
ceceae1b | 1504 | } |
df293bbb | 1505 | |
fd7462de PNA |
1506 | /* we cannot set a helper for an existing conntrack */ |
1507 | return -EOPNOTSUPP; | |
c1d10adb PNA |
1508 | } |
1509 | ||
4054ff45 PNA |
1510 | static int ctnetlink_change_timeout(struct nf_conn *ct, |
1511 | const struct nlattr * const cda[]) | |
c1d10adb | 1512 | { |
77236b6e | 1513 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1514 | |
f330a7fd | 1515 | ct->timeout = nfct_time_stamp + timeout * HZ; |
c1d10adb | 1516 | |
f330a7fd FW |
1517 | if (test_bit(IPS_DYING_BIT, &ct->status)) |
1518 | return -ETIME; | |
c1d10adb PNA |
1519 | |
1520 | return 0; | |
1521 | } | |
1522 | ||
d0b0268f PM |
1523 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1524 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1525 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1526 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1527 | }; | |
1528 | ||
4054ff45 PNA |
1529 | static int ctnetlink_change_protoinfo(struct nf_conn *ct, |
1530 | const struct nlattr * const cda[]) | |
c1d10adb | 1531 | { |
39938324 PM |
1532 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
1533 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; | |
605dcad6 | 1534 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1535 | int err = 0; |
1536 | ||
130ffbc2 DB |
1537 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
1538 | if (err < 0) | |
1539 | return err; | |
c1d10adb | 1540 | |
cd91566e FW |
1541 | rcu_read_lock(); |
1542 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1543 | if (l4proto->from_nlattr) |
1544 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1545 | rcu_read_unlock(); |
c1d10adb PNA |
1546 | |
1547 | return err; | |
1548 | } | |
1549 | ||
41d73ec0 PM |
1550 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
1551 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1552 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1553 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
d0b0268f PM |
1554 | }; |
1555 | ||
4054ff45 PNA |
1556 | static int change_seq_adj(struct nf_ct_seqadj *seq, |
1557 | const struct nlattr * const attr) | |
13eae15a | 1558 | { |
130ffbc2 | 1559 | int err; |
41d73ec0 | 1560 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
13eae15a | 1561 | |
41d73ec0 | 1562 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy); |
130ffbc2 DB |
1563 | if (err < 0) |
1564 | return err; | |
13eae15a | 1565 | |
41d73ec0 | 1566 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
13eae15a PNA |
1567 | return -EINVAL; |
1568 | ||
41d73ec0 PM |
1569 | seq->correction_pos = |
1570 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); | |
13eae15a | 1571 | |
41d73ec0 | 1572 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
13eae15a PNA |
1573 | return -EINVAL; |
1574 | ||
41d73ec0 PM |
1575 | seq->offset_before = |
1576 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); | |
13eae15a | 1577 | |
41d73ec0 | 1578 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
13eae15a PNA |
1579 | return -EINVAL; |
1580 | ||
41d73ec0 PM |
1581 | seq->offset_after = |
1582 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); | |
13eae15a PNA |
1583 | |
1584 | return 0; | |
1585 | } | |
1586 | ||
1587 | static int | |
41d73ec0 PM |
1588 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
1589 | const struct nlattr * const cda[]) | |
13eae15a | 1590 | { |
41d73ec0 | 1591 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
13eae15a | 1592 | int ret = 0; |
13eae15a | 1593 | |
41d73ec0 | 1594 | if (!seqadj) |
13eae15a PNA |
1595 | return 0; |
1596 | ||
41d73ec0 PM |
1597 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
1598 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], | |
1599 | cda[CTA_SEQ_ADJ_ORIG]); | |
13eae15a PNA |
1600 | if (ret < 0) |
1601 | return ret; | |
1602 | ||
1603 | ct->status |= IPS_SEQ_ADJUST; | |
1604 | } | |
1605 | ||
41d73ec0 PM |
1606 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
1607 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], | |
1608 | cda[CTA_SEQ_ADJ_REPLY]); | |
13eae15a PNA |
1609 | if (ret < 0) |
1610 | return ret; | |
1611 | ||
1612 | ct->status |= IPS_SEQ_ADJUST; | |
1613 | } | |
1614 | ||
1615 | return 0; | |
1616 | } | |
13eae15a | 1617 | |
9b21f6a9 FW |
1618 | static int |
1619 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) | |
1620 | { | |
1621 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
1622 | size_t len = nla_len(cda[CTA_LABELS]); | |
1623 | const void *mask = cda[CTA_LABELS_MASK]; | |
1624 | ||
1625 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ | |
1626 | return -EINVAL; | |
1627 | ||
1628 | if (mask) { | |
1629 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || | |
1630 | nla_len(cda[CTA_LABELS_MASK]) != len) | |
1631 | return -EINVAL; | |
1632 | mask = nla_data(cda[CTA_LABELS_MASK]); | |
1633 | } | |
1634 | ||
1635 | len /= sizeof(u32); | |
1636 | ||
1637 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); | |
1638 | #else | |
1639 | return -EOPNOTSUPP; | |
1640 | #endif | |
1641 | } | |
1642 | ||
c1d10adb | 1643 | static int |
39938324 PM |
1644 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1645 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1646 | { |
1647 | int err; | |
1648 | ||
e098360f PNA |
1649 | /* only allow NAT changes and master assignation for new conntracks */ |
1650 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1651 | return -EOPNOTSUPP; | |
1652 | ||
df6fb868 | 1653 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1654 | err = ctnetlink_change_helper(ct, cda); |
1655 | if (err < 0) | |
1656 | return err; | |
1657 | } | |
1658 | ||
df6fb868 | 1659 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1660 | err = ctnetlink_change_timeout(ct, cda); |
1661 | if (err < 0) | |
1662 | return err; | |
1663 | } | |
1664 | ||
df6fb868 | 1665 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1666 | err = ctnetlink_change_status(ct, cda); |
1667 | if (err < 0) | |
1668 | return err; | |
1669 | } | |
1670 | ||
df6fb868 | 1671 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1672 | err = ctnetlink_change_protoinfo(ct, cda); |
1673 | if (err < 0) | |
1674 | return err; | |
1675 | } | |
1676 | ||
bcd1e830 | 1677 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1678 | if (cda[CTA_MARK]) |
77236b6e | 1679 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1680 | #endif |
1681 | ||
41d73ec0 PM |
1682 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1683 | err = ctnetlink_change_seq_adj(ct, cda); | |
13eae15a PNA |
1684 | if (err < 0) |
1685 | return err; | |
1686 | } | |
41d73ec0 | 1687 | |
9b21f6a9 FW |
1688 | if (cda[CTA_LABELS]) { |
1689 | err = ctnetlink_attach_labels(ct, cda); | |
1690 | if (err < 0) | |
1691 | return err; | |
1692 | } | |
13eae15a | 1693 | |
c1d10adb PNA |
1694 | return 0; |
1695 | } | |
1696 | ||
f0a3c086 | 1697 | static struct nf_conn * |
308ac914 DB |
1698 | ctnetlink_create_conntrack(struct net *net, |
1699 | const struct nf_conntrack_zone *zone, | |
9592a5c0 | 1700 | const struct nlattr * const cda[], |
c1d10adb | 1701 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1702 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1703 | u8 u3) |
c1d10adb PNA |
1704 | { |
1705 | struct nf_conn *ct; | |
1706 | int err = -EINVAL; | |
ceceae1b | 1707 | struct nf_conntrack_helper *helper; |
315c34da | 1708 | struct nf_conn_tstamp *tstamp; |
c1d10adb | 1709 | |
ef00f89f | 1710 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1711 | if (IS_ERR(ct)) |
f0a3c086 | 1712 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1713 | |
df6fb868 | 1714 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1715 | goto err1; |
c1d10adb | 1716 | |
f330a7fd | 1717 | ct->timeout = nfct_time_stamp + ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ; |
c1d10adb | 1718 | |
1575e7ea | 1719 | rcu_read_lock(); |
226c0c0e | 1720 | if (cda[CTA_HELP]) { |
29fe1b48 | 1721 | char *helpname = NULL; |
ae243bee PNA |
1722 | struct nlattr *helpinfo = NULL; |
1723 | ||
1724 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); | |
0f5b3e85 PM |
1725 | if (err < 0) |
1726 | goto err2; | |
226c0c0e | 1727 | |
794e6871 PM |
1728 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1729 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1730 | if (helper == NULL) { |
1731 | rcu_read_unlock(); | |
1732 | #ifdef CONFIG_MODULES | |
1733 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1734 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1735 | goto err1; |
226c0c0e PNA |
1736 | } |
1737 | ||
1738 | rcu_read_lock(); | |
794e6871 PM |
1739 | helper = __nf_conntrack_helper_find(helpname, |
1740 | nf_ct_l3num(ct), | |
1741 | nf_ct_protonum(ct)); | |
226c0c0e | 1742 | if (helper) { |
226c0c0e | 1743 | err = -EAGAIN; |
0f5b3e85 | 1744 | goto err2; |
226c0c0e PNA |
1745 | } |
1746 | rcu_read_unlock(); | |
1747 | #endif | |
1748 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1749 | goto err1; |
226c0c0e PNA |
1750 | } else { |
1751 | struct nf_conn_help *help; | |
1752 | ||
1afc5679 | 1753 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
226c0c0e | 1754 | if (help == NULL) { |
226c0c0e | 1755 | err = -ENOMEM; |
0f5b3e85 | 1756 | goto err2; |
226c0c0e | 1757 | } |
ae243bee | 1758 | /* set private helper data if allowed. */ |
7be54ca4 | 1759 | if (helper->from_nlattr) |
ae243bee | 1760 | helper->from_nlattr(helpinfo, ct); |
226c0c0e PNA |
1761 | |
1762 | /* not in hash table yet so not strictly necessary */ | |
a9b3cd7f | 1763 | RCU_INIT_POINTER(help->helper, helper); |
226c0c0e PNA |
1764 | } |
1765 | } else { | |
1766 | /* try an implicit helper assignation */ | |
b2a15a60 | 1767 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1768 | if (err < 0) |
1769 | goto err2; | |
1575e7ea PNA |
1770 | } |
1771 | ||
0eba801b PNA |
1772 | err = ctnetlink_setup_nat(ct, cda); |
1773 | if (err < 0) | |
1774 | goto err2; | |
e6a7d3c0 | 1775 | |
a88e22ad | 1776 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
a992ca2a | 1777 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
a88e22ad | 1778 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
c539f017 FW |
1779 | nf_ct_labels_ext_add(ct); |
1780 | ||
a88e22ad PNA |
1781 | /* we must add conntrack extensions before confirmation. */ |
1782 | ct->status |= IPS_CONFIRMED; | |
1783 | ||
1784 | if (cda[CTA_STATUS]) { | |
1785 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1786 | if (err < 0) |
1787 | goto err2; | |
bbb3357d | 1788 | } |
c1d10adb | 1789 | |
41d73ec0 PM |
1790 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1791 | err = ctnetlink_change_seq_adj(ct, cda); | |
0f5b3e85 PM |
1792 | if (err < 0) |
1793 | goto err2; | |
c969aa7d | 1794 | } |
c969aa7d | 1795 | |
e5fc9e7a | 1796 | memset(&ct->proto, 0, sizeof(ct->proto)); |
df6fb868 | 1797 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1798 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1799 | if (err < 0) |
1800 | goto err2; | |
c1d10adb PNA |
1801 | } |
1802 | ||
bcd1e830 | 1803 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1804 | if (cda[CTA_MARK]) |
77236b6e | 1805 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1806 | #endif |
1807 | ||
5faa1f4c | 1808 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1809 | if (cda[CTA_TUPLE_MASTER]) { |
1810 | struct nf_conntrack_tuple master; | |
1811 | struct nf_conntrack_tuple_hash *master_h; | |
1812 | struct nf_conn *master_ct; | |
1813 | ||
deedb590 DB |
1814 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, |
1815 | u3, NULL); | |
7ec47496 | 1816 | if (err < 0) |
0f5b3e85 | 1817 | goto err2; |
7ec47496 | 1818 | |
ef00f89f | 1819 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
1820 | if (master_h == NULL) { |
1821 | err = -ENOENT; | |
0f5b3e85 | 1822 | goto err2; |
7ec47496 PNA |
1823 | } |
1824 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1825 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1826 | ct->master = master_ct; |
f2a89004 | 1827 | } |
315c34da PNA |
1828 | tstamp = nf_conn_tstamp_find(ct); |
1829 | if (tstamp) | |
d2de875c | 1830 | tstamp->start = ktime_get_real_ns(); |
5faa1f4c | 1831 | |
7d367e06 JK |
1832 | err = nf_conntrack_hash_check_insert(ct); |
1833 | if (err < 0) | |
1834 | goto err2; | |
1835 | ||
58a3c9bb | 1836 | rcu_read_unlock(); |
dafc741c | 1837 | |
f0a3c086 | 1838 | return ct; |
c1d10adb | 1839 | |
0f5b3e85 PM |
1840 | err2: |
1841 | rcu_read_unlock(); | |
1842 | err1: | |
c1d10adb | 1843 | nf_conntrack_free(ct); |
f0a3c086 | 1844 | return ERR_PTR(err); |
c1d10adb PNA |
1845 | } |
1846 | ||
7b8002a1 PNA |
1847 | static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl, |
1848 | struct sk_buff *skb, | |
1849 | const struct nlmsghdr *nlh, | |
1850 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1851 | { |
1852 | struct nf_conntrack_tuple otuple, rtuple; | |
1853 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1854 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
7d367e06 | 1855 | struct nf_conn *ct; |
c1d10adb | 1856 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 1857 | struct nf_conntrack_zone zone; |
ef00f89f PM |
1858 | int err; |
1859 | ||
1860 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1861 | if (err < 0) | |
1862 | return err; | |
c1d10adb | 1863 | |
df6fb868 | 1864 | if (cda[CTA_TUPLE_ORIG]) { |
deedb590 DB |
1865 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, |
1866 | u3, &zone); | |
c1d10adb PNA |
1867 | if (err < 0) |
1868 | return err; | |
1869 | } | |
1870 | ||
df6fb868 | 1871 | if (cda[CTA_TUPLE_REPLY]) { |
deedb590 DB |
1872 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, |
1873 | u3, &zone); | |
c1d10adb PNA |
1874 | if (err < 0) |
1875 | return err; | |
1876 | } | |
1877 | ||
df6fb868 | 1878 | if (cda[CTA_TUPLE_ORIG]) |
308ac914 | 1879 | h = nf_conntrack_find_get(net, &zone, &otuple); |
df6fb868 | 1880 | else if (cda[CTA_TUPLE_REPLY]) |
308ac914 | 1881 | h = nf_conntrack_find_get(net, &zone, &rtuple); |
c1d10adb PNA |
1882 | |
1883 | if (h == NULL) { | |
c1d10adb | 1884 | err = -ENOENT; |
f0a3c086 | 1885 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
fecc1133 | 1886 | enum ip_conntrack_events events; |
5faa1f4c | 1887 | |
442fad94 FW |
1888 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
1889 | return -EINVAL; | |
1890 | ||
308ac914 | 1891 | ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple, |
f0a3c086 | 1892 | &rtuple, u3); |
7d367e06 JK |
1893 | if (IS_ERR(ct)) |
1894 | return PTR_ERR(ct); | |
1895 | ||
f0a3c086 | 1896 | err = 0; |
fecc1133 PNA |
1897 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1898 | events = IPCT_RELATED; | |
1899 | else | |
1900 | events = IPCT_NEW; | |
1901 | ||
9b21f6a9 FW |
1902 | if (cda[CTA_LABELS] && |
1903 | ctnetlink_attach_labels(ct, cda) == 0) | |
1904 | events |= (1 << IPCT_LABEL); | |
1905 | ||
858b3133 PM |
1906 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1907 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1908 | (1 << IPCT_HELPER) | |
1909 | (1 << IPCT_PROTOINFO) | | |
41d73ec0 | 1910 | (1 << IPCT_SEQADJ) | |
a0891aa6 | 1911 | (1 << IPCT_MARK) | events, |
15e47304 | 1912 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 1913 | nlmsg_report(nlh)); |
f0a3c086 | 1914 | nf_ct_put(ct); |
7d367e06 | 1915 | } |
5faa1f4c | 1916 | |
c1d10adb PNA |
1917 | return err; |
1918 | } | |
1919 | /* implicit 'else' */ | |
1920 | ||
c1d10adb | 1921 | err = -EEXIST; |
7d367e06 | 1922 | ct = nf_ct_tuplehash_to_ctrack(h); |
ff4ca827 | 1923 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
ca7433df | 1924 | spin_lock_bh(&nf_conntrack_expect_lock); |
19abb7b0 | 1925 | err = ctnetlink_change_conntrack(ct, cda); |
ca7433df | 1926 | spin_unlock_bh(&nf_conntrack_expect_lock); |
19abb7b0 | 1927 | if (err == 0) { |
858b3133 PM |
1928 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1929 | (1 << IPCT_ASSURED) | | |
a0891aa6 | 1930 | (1 << IPCT_HELPER) | |
797a7d66 | 1931 | (1 << IPCT_LABEL) | |
a0891aa6 | 1932 | (1 << IPCT_PROTOINFO) | |
41d73ec0 | 1933 | (1 << IPCT_SEQADJ) | |
a0891aa6 | 1934 | (1 << IPCT_MARK), |
15e47304 | 1935 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 1936 | nlmsg_report(nlh)); |
7d367e06 | 1937 | } |
ff4ca827 | 1938 | } |
c1d10adb | 1939 | |
7d367e06 | 1940 | nf_ct_put(ct); |
c1d10adb PNA |
1941 | return err; |
1942 | } | |
1943 | ||
392025f8 | 1944 | static int |
15e47304 | 1945 | ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
392025f8 PNA |
1946 | __u16 cpu, const struct ip_conntrack_stat *st) |
1947 | { | |
1948 | struct nlmsghdr *nlh; | |
1949 | struct nfgenmsg *nfmsg; | |
15e47304 | 1950 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
1951 | |
1952 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU); | |
15e47304 | 1953 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
1954 | if (nlh == NULL) |
1955 | goto nlmsg_failure; | |
1956 | ||
1957 | nfmsg = nlmsg_data(nlh); | |
1958 | nfmsg->nfgen_family = AF_UNSPEC; | |
1959 | nfmsg->version = NFNETLINK_V0; | |
1960 | nfmsg->res_id = htons(cpu); | |
1961 | ||
1962 | if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) || | |
1963 | nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || | |
1964 | nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) || | |
1965 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || | |
1966 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || | |
1967 | nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) || | |
1968 | nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) || | |
1969 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || | |
1970 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, | |
1971 | htonl(st->insert_failed)) || | |
1972 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || | |
1973 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || | |
1974 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || | |
1975 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, | |
1976 | htonl(st->search_restart))) | |
1977 | goto nla_put_failure; | |
1978 | ||
1979 | nlmsg_end(skb, nlh); | |
1980 | return skb->len; | |
1981 | ||
1982 | nla_put_failure: | |
1983 | nlmsg_failure: | |
1984 | nlmsg_cancel(skb, nlh); | |
1985 | return -1; | |
1986 | } | |
1987 | ||
1988 | static int | |
1989 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1990 | { | |
1991 | int cpu; | |
1992 | struct net *net = sock_net(skb->sk); | |
1993 | ||
1994 | if (cb->args[0] == nr_cpu_ids) | |
1995 | return 0; | |
1996 | ||
1997 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
1998 | const struct ip_conntrack_stat *st; | |
1999 | ||
2000 | if (!cpu_possible(cpu)) | |
2001 | continue; | |
2002 | ||
2003 | st = per_cpu_ptr(net->ct.stat, cpu); | |
2004 | if (ctnetlink_ct_stat_cpu_fill_info(skb, | |
15e47304 | 2005 | NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
2006 | cb->nlh->nlmsg_seq, |
2007 | cpu, st) < 0) | |
2008 | break; | |
2009 | } | |
2010 | cb->args[0] = cpu; | |
2011 | ||
2012 | return skb->len; | |
2013 | } | |
2014 | ||
7b8002a1 PNA |
2015 | static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl, |
2016 | struct sk_buff *skb, | |
2017 | const struct nlmsghdr *nlh, | |
2018 | const struct nlattr * const cda[]) | |
392025f8 PNA |
2019 | { |
2020 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
2021 | struct netlink_dump_control c = { | |
2022 | .dump = ctnetlink_ct_stat_cpu_dump, | |
2023 | }; | |
2024 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2025 | } | |
2026 | ||
2027 | return 0; | |
2028 | } | |
2029 | ||
2030 | static int | |
15e47304 | 2031 | ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
392025f8 PNA |
2032 | struct net *net) |
2033 | { | |
2034 | struct nlmsghdr *nlh; | |
2035 | struct nfgenmsg *nfmsg; | |
15e47304 | 2036 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
2037 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
2038 | ||
2039 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS); | |
15e47304 | 2040 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
2041 | if (nlh == NULL) |
2042 | goto nlmsg_failure; | |
2043 | ||
2044 | nfmsg = nlmsg_data(nlh); | |
2045 | nfmsg->nfgen_family = AF_UNSPEC; | |
2046 | nfmsg->version = NFNETLINK_V0; | |
2047 | nfmsg->res_id = 0; | |
2048 | ||
2049 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) | |
2050 | goto nla_put_failure; | |
2051 | ||
2052 | nlmsg_end(skb, nlh); | |
2053 | return skb->len; | |
2054 | ||
2055 | nla_put_failure: | |
2056 | nlmsg_failure: | |
2057 | nlmsg_cancel(skb, nlh); | |
2058 | return -1; | |
2059 | } | |
2060 | ||
7b8002a1 PNA |
2061 | static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl, |
2062 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
2063 | const struct nlattr * const cda[]) | |
392025f8 PNA |
2064 | { |
2065 | struct sk_buff *skb2; | |
2066 | int err; | |
2067 | ||
2068 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2069 | if (skb2 == NULL) | |
2070 | return -ENOMEM; | |
2071 | ||
15e47304 | 2072 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
392025f8 PNA |
2073 | nlh->nlmsg_seq, |
2074 | NFNL_MSG_TYPE(nlh->nlmsg_type), | |
2075 | sock_net(skb->sk)); | |
2076 | if (err <= 0) | |
2077 | goto free; | |
2078 | ||
15e47304 | 2079 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
392025f8 PNA |
2080 | if (err < 0) |
2081 | goto out; | |
2082 | ||
2083 | return 0; | |
2084 | ||
2085 | free: | |
2086 | kfree_skb(skb2); | |
2087 | out: | |
2088 | /* this avoids a loop in nfnetlink. */ | |
2089 | return err == -EAGAIN ? -ENOBUFS : err; | |
2090 | } | |
2091 | ||
bd077937 PNA |
2092 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
2093 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, | |
2094 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
2095 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
2096 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
2097 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
2098 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, | |
2099 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
2100 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, | |
2101 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, | |
2102 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, | |
2103 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, | |
2104 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, | |
2105 | }; | |
2106 | ||
2107 | static struct nf_conntrack_expect * | |
2108 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, | |
2109 | struct nf_conntrack_helper *helper, | |
2110 | struct nf_conntrack_tuple *tuple, | |
2111 | struct nf_conntrack_tuple *mask); | |
2112 | ||
83f3e94d | 2113 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
9cb01766 | 2114 | static size_t |
a4b4766c | 2115 | ctnetlink_glue_build_size(const struct nf_conn *ct) |
9cb01766 PNA |
2116 | { |
2117 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
2118 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
2119 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
2120 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
2121 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
2122 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
2123 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ | |
2124 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
2125 | + nla_total_size(0) /* CTA_HELP */ | |
2126 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
2127 | + ctnetlink_secctx_size(ct) | |
2128 | #ifdef CONFIG_NF_NAT_NEEDED | |
2129 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ | |
2130 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
2131 | #endif | |
2132 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2133 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ | |
4a001068 KM |
2134 | #endif |
2135 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
deedb590 | 2136 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
9cb01766 PNA |
2137 | #endif |
2138 | + ctnetlink_proto_size(ct) | |
2139 | ; | |
2140 | } | |
2141 | ||
224a0597 | 2142 | static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb, |
a4b4766c | 2143 | enum ip_conntrack_info *ctinfo) |
b7bd1809 PNA |
2144 | { |
2145 | struct nf_conn *ct; | |
2146 | ||
2147 | ct = nf_ct_get(skb, ctinfo); | |
2148 | if (ct && nf_ct_is_untracked(ct)) | |
2149 | ct = NULL; | |
2150 | ||
2151 | return ct; | |
2152 | } | |
2153 | ||
a4b4766c | 2154 | static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct) |
9cb01766 | 2155 | { |
308ac914 | 2156 | const struct nf_conntrack_zone *zone; |
9cb01766 PNA |
2157 | struct nlattr *nest_parms; |
2158 | ||
2159 | rcu_read_lock(); | |
deedb590 DB |
2160 | zone = nf_ct_zone(ct); |
2161 | ||
9cb01766 PNA |
2162 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
2163 | if (!nest_parms) | |
2164 | goto nla_put_failure; | |
2165 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) | |
2166 | goto nla_put_failure; | |
deedb590 DB |
2167 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
2168 | NF_CT_ZONE_DIR_ORIG) < 0) | |
2169 | goto nla_put_failure; | |
9cb01766 PNA |
2170 | nla_nest_end(skb, nest_parms); |
2171 | ||
2172 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); | |
2173 | if (!nest_parms) | |
2174 | goto nla_put_failure; | |
2175 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) | |
2176 | goto nla_put_failure; | |
deedb590 DB |
2177 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
2178 | NF_CT_ZONE_DIR_REPL) < 0) | |
2179 | goto nla_put_failure; | |
9cb01766 PNA |
2180 | nla_nest_end(skb, nest_parms); |
2181 | ||
deedb590 DB |
2182 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
2183 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
308ac914 | 2184 | goto nla_put_failure; |
9cb01766 PNA |
2185 | |
2186 | if (ctnetlink_dump_id(skb, ct) < 0) | |
2187 | goto nla_put_failure; | |
2188 | ||
2189 | if (ctnetlink_dump_status(skb, ct) < 0) | |
2190 | goto nla_put_failure; | |
2191 | ||
2192 | if (ctnetlink_dump_timeout(skb, ct) < 0) | |
2193 | goto nla_put_failure; | |
2194 | ||
2195 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) | |
2196 | goto nla_put_failure; | |
2197 | ||
2198 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) | |
2199 | goto nla_put_failure; | |
2200 | ||
2201 | #ifdef CONFIG_NF_CONNTRACK_SECMARK | |
2202 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) | |
2203 | goto nla_put_failure; | |
2204 | #endif | |
2205 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) | |
2206 | goto nla_put_failure; | |
2207 | ||
2208 | if ((ct->status & IPS_SEQ_ADJUST) && | |
41d73ec0 | 2209 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
9cb01766 PNA |
2210 | goto nla_put_failure; |
2211 | ||
2212 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2213 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) | |
2214 | goto nla_put_failure; | |
2215 | #endif | |
0ceabd83 FW |
2216 | if (ctnetlink_dump_labels(skb, ct) < 0) |
2217 | goto nla_put_failure; | |
9cb01766 PNA |
2218 | rcu_read_unlock(); |
2219 | return 0; | |
2220 | ||
2221 | nla_put_failure: | |
2222 | rcu_read_unlock(); | |
2223 | return -ENOSPC; | |
2224 | } | |
2225 | ||
b7bd1809 | 2226 | static int |
a4b4766c KM |
2227 | ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct, |
2228 | enum ip_conntrack_info ctinfo, | |
2229 | u_int16_t ct_attr, u_int16_t ct_info_attr) | |
b7bd1809 PNA |
2230 | { |
2231 | struct nlattr *nest_parms; | |
2232 | ||
2233 | nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED); | |
2234 | if (!nest_parms) | |
2235 | goto nla_put_failure; | |
2236 | ||
a4b4766c | 2237 | if (__ctnetlink_glue_build(skb, ct) < 0) |
b7bd1809 PNA |
2238 | goto nla_put_failure; |
2239 | ||
2240 | nla_nest_end(skb, nest_parms); | |
2241 | ||
2242 | if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo))) | |
2243 | goto nla_put_failure; | |
2244 | ||
2245 | return 0; | |
2246 | ||
2247 | nla_put_failure: | |
2248 | return -ENOSPC; | |
2249 | } | |
2250 | ||
9cb01766 | 2251 | static int |
a4b4766c | 2252 | ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) |
9cb01766 PNA |
2253 | { |
2254 | int err; | |
2255 | ||
2256 | if (cda[CTA_TIMEOUT]) { | |
2257 | err = ctnetlink_change_timeout(ct, cda); | |
2258 | if (err < 0) | |
2259 | return err; | |
2260 | } | |
2261 | if (cda[CTA_STATUS]) { | |
2262 | err = ctnetlink_change_status(ct, cda); | |
2263 | if (err < 0) | |
2264 | return err; | |
2265 | } | |
2266 | if (cda[CTA_HELP]) { | |
2267 | err = ctnetlink_change_helper(ct, cda); | |
2268 | if (err < 0) | |
2269 | return err; | |
2270 | } | |
9b21f6a9 FW |
2271 | if (cda[CTA_LABELS]) { |
2272 | err = ctnetlink_attach_labels(ct, cda); | |
2273 | if (err < 0) | |
2274 | return err; | |
2275 | } | |
9cb01766 | 2276 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
534473c6 FW |
2277 | if (cda[CTA_MARK]) { |
2278 | u32 mask = 0, mark, newmark; | |
2279 | if (cda[CTA_MARK_MASK]) | |
2280 | mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
2281 | ||
2282 | mark = ntohl(nla_get_be32(cda[CTA_MARK])); | |
2283 | newmark = (ct->mark & mask) ^ mark; | |
2284 | if (newmark != ct->mark) | |
2285 | ct->mark = newmark; | |
2286 | } | |
9cb01766 PNA |
2287 | #endif |
2288 | return 0; | |
2289 | } | |
2290 | ||
2291 | static int | |
a4b4766c | 2292 | ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct) |
9cb01766 PNA |
2293 | { |
2294 | struct nlattr *cda[CTA_MAX+1]; | |
68e035c9 | 2295 | int ret; |
9cb01766 | 2296 | |
130ffbc2 DB |
2297 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); |
2298 | if (ret < 0) | |
2299 | return ret; | |
9cb01766 | 2300 | |
ca7433df | 2301 | spin_lock_bh(&nf_conntrack_expect_lock); |
a4b4766c | 2302 | ret = ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct); |
ca7433df | 2303 | spin_unlock_bh(&nf_conntrack_expect_lock); |
68e035c9 PNA |
2304 | |
2305 | return ret; | |
9cb01766 PNA |
2306 | } |
2307 | ||
a4b4766c KM |
2308 | static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda, |
2309 | const struct nf_conn *ct, | |
2310 | struct nf_conntrack_tuple *tuple, | |
2311 | struct nf_conntrack_tuple *mask) | |
bd077937 PNA |
2312 | { |
2313 | int err; | |
2314 | ||
2315 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, | |
deedb590 | 2316 | nf_ct_l3num(ct), NULL); |
bd077937 PNA |
2317 | if (err < 0) |
2318 | return err; | |
2319 | ||
2320 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, | |
deedb590 | 2321 | nf_ct_l3num(ct), NULL); |
bd077937 PNA |
2322 | } |
2323 | ||
2324 | static int | |
a4b4766c KM |
2325 | ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, |
2326 | u32 portid, u32 report) | |
bd077937 PNA |
2327 | { |
2328 | struct nlattr *cda[CTA_EXPECT_MAX+1]; | |
2329 | struct nf_conntrack_tuple tuple, mask; | |
b7e092c0 | 2330 | struct nf_conntrack_helper *helper = NULL; |
bd077937 PNA |
2331 | struct nf_conntrack_expect *exp; |
2332 | int err; | |
2333 | ||
2334 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy); | |
2335 | if (err < 0) | |
2336 | return err; | |
2337 | ||
a4b4766c KM |
2338 | err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda, |
2339 | ct, &tuple, &mask); | |
bd077937 PNA |
2340 | if (err < 0) |
2341 | return err; | |
2342 | ||
2343 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
2344 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
2345 | ||
2346 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), | |
2347 | nf_ct_protonum(ct)); | |
2348 | if (helper == NULL) | |
2349 | return -EOPNOTSUPP; | |
2350 | } | |
2351 | ||
2352 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, | |
2353 | helper, &tuple, &mask); | |
2354 | if (IS_ERR(exp)) | |
2355 | return PTR_ERR(exp); | |
2356 | ||
2357 | err = nf_ct_expect_related_report(exp, portid, report); | |
2358 | if (err < 0) { | |
2359 | nf_ct_expect_put(exp); | |
2360 | return err; | |
2361 | } | |
2362 | ||
2363 | return 0; | |
2364 | } | |
2365 | ||
a4b4766c KM |
2366 | static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct, |
2367 | enum ip_conntrack_info ctinfo, int diff) | |
b7bd1809 PNA |
2368 | { |
2369 | if (!(ct->status & IPS_NAT_MASK)) | |
2370 | return; | |
2371 | ||
2372 | nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff); | |
2373 | } | |
2374 | ||
a4b4766c KM |
2375 | static struct nfnl_ct_hook ctnetlink_glue_hook = { |
2376 | .get_ct = ctnetlink_glue_get_ct, | |
2377 | .build_size = ctnetlink_glue_build_size, | |
2378 | .build = ctnetlink_glue_build, | |
2379 | .parse = ctnetlink_glue_parse, | |
2380 | .attach_expect = ctnetlink_glue_attach_expect, | |
2381 | .seq_adjust = ctnetlink_glue_seqadj, | |
9cb01766 | 2382 | }; |
83f3e94d | 2383 | #endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */ |
9cb01766 | 2384 | |
601e68e1 YH |
2385 | /*********************************************************************** |
2386 | * EXPECT | |
2387 | ***********************************************************************/ | |
c1d10adb | 2388 | |
4054ff45 PNA |
2389 | static int ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
2390 | const struct nf_conntrack_tuple *tuple, | |
2391 | enum ctattr_expect type) | |
c1d10adb | 2392 | { |
df6fb868 | 2393 | struct nlattr *nest_parms; |
601e68e1 | 2394 | |
df6fb868 PM |
2395 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
2396 | if (!nest_parms) | |
2397 | goto nla_put_failure; | |
c1d10adb | 2398 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
2399 | goto nla_put_failure; |
2400 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
2401 | |
2402 | return 0; | |
2403 | ||
df6fb868 | 2404 | nla_put_failure: |
c1d10adb | 2405 | return -1; |
601e68e1 | 2406 | } |
c1d10adb | 2407 | |
4054ff45 PNA |
2408 | static int ctnetlink_exp_dump_mask(struct sk_buff *skb, |
2409 | const struct nf_conntrack_tuple *tuple, | |
2410 | const struct nf_conntrack_tuple_mask *mask) | |
1cde6436 PNA |
2411 | { |
2412 | int ret; | |
2413 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 2414 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 2415 | struct nf_conntrack_tuple m; |
df6fb868 | 2416 | struct nlattr *nest_parms; |
d4156e8c PM |
2417 | |
2418 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 2419 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
2420 | m.src.u.all = mask->src.u.all; |
2421 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 2422 | |
df6fb868 PM |
2423 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
2424 | if (!nest_parms) | |
2425 | goto nla_put_failure; | |
1cde6436 | 2426 | |
3b988ece | 2427 | rcu_read_lock(); |
528a3a6f | 2428 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 2429 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
3b988ece HS |
2430 | if (ret >= 0) { |
2431 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
2432 | tuple->dst.protonum); | |
d4156e8c | 2433 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
3b988ece HS |
2434 | } |
2435 | rcu_read_unlock(); | |
2436 | ||
1cde6436 | 2437 | if (unlikely(ret < 0)) |
df6fb868 | 2438 | goto nla_put_failure; |
1cde6436 | 2439 | |
df6fb868 | 2440 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
2441 | |
2442 | return 0; | |
2443 | ||
df6fb868 | 2444 | nla_put_failure: |
1cde6436 PNA |
2445 | return -1; |
2446 | } | |
2447 | ||
c7232c99 PM |
2448 | static const union nf_inet_addr any_addr; |
2449 | ||
bb5cf80e | 2450 | static int |
c1d10adb | 2451 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 2452 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2453 | { |
2454 | struct nf_conn *master = exp->master; | |
c1216382 | 2455 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
bc01befd | 2456 | struct nf_conn_help *help; |
076a0ca0 PNA |
2457 | #ifdef CONFIG_NF_NAT_NEEDED |
2458 | struct nlattr *nest_parms; | |
2459 | struct nf_conntrack_tuple nat_tuple = {}; | |
2460 | #endif | |
544d5c7d PNA |
2461 | struct nf_ct_helper_expectfn *expfn; |
2462 | ||
d978e5da PM |
2463 | if (timeout < 0) |
2464 | timeout = 0; | |
c1d10adb PNA |
2465 | |
2466 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 2467 | goto nla_put_failure; |
1cde6436 | 2468 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 2469 | goto nla_put_failure; |
c1d10adb PNA |
2470 | if (ctnetlink_exp_dump_tuple(skb, |
2471 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
2472 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 2473 | goto nla_put_failure; |
601e68e1 | 2474 | |
076a0ca0 | 2475 | #ifdef CONFIG_NF_NAT_NEEDED |
c7232c99 PM |
2476 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
2477 | exp->saved_proto.all) { | |
076a0ca0 PNA |
2478 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
2479 | if (!nest_parms) | |
2480 | goto nla_put_failure; | |
2481 | ||
cc1eb431 DM |
2482 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
2483 | goto nla_put_failure; | |
076a0ca0 PNA |
2484 | |
2485 | nat_tuple.src.l3num = nf_ct_l3num(master); | |
c7232c99 | 2486 | nat_tuple.src.u3 = exp->saved_addr; |
076a0ca0 PNA |
2487 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
2488 | nat_tuple.src.u = exp->saved_proto; | |
2489 | ||
2490 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, | |
2491 | CTA_EXPECT_NAT_TUPLE) < 0) | |
2492 | goto nla_put_failure; | |
2493 | nla_nest_end(skb, nest_parms); | |
2494 | } | |
2495 | #endif | |
cc1eb431 DM |
2496 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
2497 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || | |
2498 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || | |
2499 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) | |
2500 | goto nla_put_failure; | |
bc01befd PNA |
2501 | help = nfct_help(master); |
2502 | if (help) { | |
2503 | struct nf_conntrack_helper *helper; | |
2504 | ||
2505 | helper = rcu_dereference(help->helper); | |
cc1eb431 DM |
2506 | if (helper && |
2507 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) | |
2508 | goto nla_put_failure; | |
bc01befd | 2509 | } |
544d5c7d | 2510 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
cc1eb431 DM |
2511 | if (expfn != NULL && |
2512 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) | |
2513 | goto nla_put_failure; | |
c1d10adb PNA |
2514 | |
2515 | return 0; | |
601e68e1 | 2516 | |
df6fb868 | 2517 | nla_put_failure: |
c1d10adb PNA |
2518 | return -1; |
2519 | } | |
2520 | ||
2521 | static int | |
15e47304 | 2522 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
8b0a231d | 2523 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2524 | { |
2525 | struct nlmsghdr *nlh; | |
2526 | struct nfgenmsg *nfmsg; | |
15e47304 | 2527 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
2528 | |
2529 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
15e47304 | 2530 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2531 | if (nlh == NULL) |
2532 | goto nlmsg_failure; | |
c1d10adb | 2533 | |
96bcf938 | 2534 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2535 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2536 | nfmsg->version = NFNETLINK_V0; | |
2537 | nfmsg->res_id = 0; | |
2538 | ||
2539 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 2540 | goto nla_put_failure; |
c1d10adb | 2541 | |
96bcf938 | 2542 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
2543 | return skb->len; |
2544 | ||
2545 | nlmsg_failure: | |
df6fb868 | 2546 | nla_put_failure: |
96bcf938 | 2547 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
2548 | return -1; |
2549 | } | |
2550 | ||
2551 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
2552 | static int |
2553 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 2554 | { |
9592a5c0 AD |
2555 | struct nf_conntrack_expect *exp = item->exp; |
2556 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
2557 | struct nlmsghdr *nlh; |
2558 | struct nfgenmsg *nfmsg; | |
c1d10adb | 2559 | struct sk_buff *skb; |
ebbf41df | 2560 | unsigned int type, group; |
c1d10adb PNA |
2561 | int flags = 0; |
2562 | ||
ebbf41df PNA |
2563 | if (events & (1 << IPEXP_DESTROY)) { |
2564 | type = IPCTNL_MSG_EXP_DELETE; | |
2565 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; | |
2566 | } else if (events & (1 << IPEXP_NEW)) { | |
c1d10adb PNA |
2567 | type = IPCTNL_MSG_EXP_NEW; |
2568 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
ebbf41df | 2569 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
c1d10adb | 2570 | } else |
e34d5c1a | 2571 | return 0; |
c1d10adb | 2572 | |
ebbf41df | 2573 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
e34d5c1a | 2574 | return 0; |
b3a27bfb | 2575 | |
96bcf938 PNA |
2576 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
2577 | if (skb == NULL) | |
150ace0d | 2578 | goto errout; |
c1d10adb | 2579 | |
b633ad5f | 2580 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
15e47304 | 2581 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2582 | if (nlh == NULL) |
2583 | goto nlmsg_failure; | |
c1d10adb | 2584 | |
96bcf938 | 2585 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2586 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2587 | nfmsg->version = NFNETLINK_V0; | |
2588 | nfmsg->res_id = 0; | |
2589 | ||
528a3a6f | 2590 | rcu_read_lock(); |
c1d10adb | 2591 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 2592 | goto nla_put_failure; |
528a3a6f | 2593 | rcu_read_unlock(); |
c1d10adb | 2594 | |
96bcf938 | 2595 | nlmsg_end(skb, nlh); |
15e47304 | 2596 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
e34d5c1a | 2597 | return 0; |
c1d10adb | 2598 | |
df6fb868 | 2599 | nla_put_failure: |
528a3a6f | 2600 | rcu_read_unlock(); |
96bcf938 | 2601 | nlmsg_cancel(skb, nlh); |
528a3a6f | 2602 | nlmsg_failure: |
c1d10adb | 2603 | kfree_skb(skb); |
150ace0d | 2604 | errout: |
9592a5c0 | 2605 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 2606 | return 0; |
c1d10adb PNA |
2607 | } |
2608 | #endif | |
cf6994c2 PM |
2609 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
2610 | { | |
31f15875 PM |
2611 | if (cb->args[1]) |
2612 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
2613 | return 0; |
2614 | } | |
c1d10adb PNA |
2615 | |
2616 | static int | |
2617 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2618 | { | |
9592a5c0 | 2619 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 2620 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 2621 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 2622 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 2623 | |
7d0742da | 2624 | rcu_read_lock(); |
31f15875 PM |
2625 | last = (struct nf_conntrack_expect *)cb->args[1]; |
2626 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 2627 | restart: |
0a93aaed | 2628 | hlist_for_each_entry(exp, &nf_ct_expect_hash[cb->args[0]], |
31f15875 PM |
2629 | hnode) { |
2630 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 2631 | continue; |
03d7dc5c FW |
2632 | |
2633 | if (!net_eq(nf_ct_net(exp->master), net)) | |
2634 | continue; | |
2635 | ||
31f15875 PM |
2636 | if (cb->args[1]) { |
2637 | if (exp != last) | |
2638 | continue; | |
2639 | cb->args[1] = 0; | |
2640 | } | |
8b0a231d | 2641 | if (ctnetlink_exp_fill_info(skb, |
15e47304 | 2642 | NETLINK_CB(cb->skb).portid, |
31f15875 PM |
2643 | cb->nlh->nlmsg_seq, |
2644 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 2645 | exp) < 0) { |
7d0742da PM |
2646 | if (!atomic_inc_not_zero(&exp->use)) |
2647 | continue; | |
31f15875 PM |
2648 | cb->args[1] = (unsigned long)exp; |
2649 | goto out; | |
2650 | } | |
cf6994c2 | 2651 | } |
31f15875 PM |
2652 | if (cb->args[1]) { |
2653 | cb->args[1] = 0; | |
2654 | goto restart; | |
cf6994c2 PM |
2655 | } |
2656 | } | |
601e68e1 | 2657 | out: |
7d0742da | 2658 | rcu_read_unlock(); |
cf6994c2 PM |
2659 | if (last) |
2660 | nf_ct_expect_put(last); | |
c1d10adb | 2661 | |
c1d10adb PNA |
2662 | return skb->len; |
2663 | } | |
2664 | ||
e844a928 PNA |
2665 | static int |
2666 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2667 | { | |
2668 | struct nf_conntrack_expect *exp, *last; | |
2669 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
2670 | struct nf_conn *ct = cb->data; | |
2671 | struct nf_conn_help *help = nfct_help(ct); | |
2672 | u_int8_t l3proto = nfmsg->nfgen_family; | |
2673 | ||
2674 | if (cb->args[0]) | |
2675 | return 0; | |
2676 | ||
2677 | rcu_read_lock(); | |
2678 | last = (struct nf_conntrack_expect *)cb->args[1]; | |
2679 | restart: | |
2680 | hlist_for_each_entry(exp, &help->expectations, lnode) { | |
2681 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
2682 | continue; | |
2683 | if (cb->args[1]) { | |
2684 | if (exp != last) | |
2685 | continue; | |
2686 | cb->args[1] = 0; | |
2687 | } | |
2688 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
2689 | cb->nlh->nlmsg_seq, | |
2690 | IPCTNL_MSG_EXP_NEW, | |
2691 | exp) < 0) { | |
2692 | if (!atomic_inc_not_zero(&exp->use)) | |
2693 | continue; | |
2694 | cb->args[1] = (unsigned long)exp; | |
2695 | goto out; | |
2696 | } | |
2697 | } | |
2698 | if (cb->args[1]) { | |
2699 | cb->args[1] = 0; | |
2700 | goto restart; | |
2701 | } | |
2702 | cb->args[0] = 1; | |
2703 | out: | |
2704 | rcu_read_unlock(); | |
2705 | if (last) | |
2706 | nf_ct_expect_put(last); | |
2707 | ||
2708 | return skb->len; | |
2709 | } | |
2710 | ||
7b8002a1 PNA |
2711 | static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl, |
2712 | struct sk_buff *skb, | |
e844a928 PNA |
2713 | const struct nlmsghdr *nlh, |
2714 | const struct nlattr * const cda[]) | |
2715 | { | |
2716 | int err; | |
e844a928 PNA |
2717 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
2718 | u_int8_t u3 = nfmsg->nfgen_family; | |
2719 | struct nf_conntrack_tuple tuple; | |
2720 | struct nf_conntrack_tuple_hash *h; | |
2721 | struct nf_conn *ct; | |
308ac914 | 2722 | struct nf_conntrack_zone zone; |
e844a928 PNA |
2723 | struct netlink_dump_control c = { |
2724 | .dump = ctnetlink_exp_ct_dump_table, | |
2725 | .done = ctnetlink_exp_done, | |
2726 | }; | |
2727 | ||
deedb590 DB |
2728 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
2729 | u3, NULL); | |
e844a928 PNA |
2730 | if (err < 0) |
2731 | return err; | |
2732 | ||
308ac914 DB |
2733 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2734 | if (err < 0) | |
2735 | return err; | |
e844a928 | 2736 | |
308ac914 | 2737 | h = nf_conntrack_find_get(net, &zone, &tuple); |
e844a928 PNA |
2738 | if (!h) |
2739 | return -ENOENT; | |
2740 | ||
2741 | ct = nf_ct_tuplehash_to_ctrack(h); | |
2742 | c.data = ct; | |
2743 | ||
2744 | err = netlink_dump_start(ctnl, skb, nlh, &c); | |
2745 | nf_ct_put(ct); | |
2746 | ||
2747 | return err; | |
2748 | } | |
2749 | ||
7b8002a1 PNA |
2750 | static int ctnetlink_get_expect(struct net *net, struct sock *ctnl, |
2751 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
2752 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
2753 | { |
2754 | struct nf_conntrack_tuple tuple; | |
2755 | struct nf_conntrack_expect *exp; | |
2756 | struct sk_buff *skb2; | |
96bcf938 | 2757 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2758 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 2759 | struct nf_conntrack_zone zone; |
ef00f89f | 2760 | int err; |
c1d10adb | 2761 | |
b8f3ab42 | 2762 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
e844a928 | 2763 | if (cda[CTA_EXPECT_MASTER]) |
7b8002a1 | 2764 | return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda); |
e844a928 PNA |
2765 | else { |
2766 | struct netlink_dump_control c = { | |
2767 | .dump = ctnetlink_exp_dump_table, | |
2768 | .done = ctnetlink_exp_done, | |
2769 | }; | |
2770 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2771 | } | |
c1d10adb PNA |
2772 | } |
2773 | ||
ef00f89f PM |
2774 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2775 | if (err < 0) | |
2776 | return err; | |
2777 | ||
35dba1d7 | 2778 | if (cda[CTA_EXPECT_TUPLE]) |
deedb590 DB |
2779 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
2780 | u3, NULL); | |
35dba1d7 | 2781 | else if (cda[CTA_EXPECT_MASTER]) |
deedb590 DB |
2782 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
2783 | u3, NULL); | |
c1d10adb PNA |
2784 | else |
2785 | return -EINVAL; | |
2786 | ||
2787 | if (err < 0) | |
2788 | return err; | |
2789 | ||
308ac914 | 2790 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
c1d10adb PNA |
2791 | if (!exp) |
2792 | return -ENOENT; | |
2793 | ||
df6fb868 | 2794 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 2795 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 2796 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 2797 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2798 | return -ENOENT; |
2799 | } | |
601e68e1 | 2800 | } |
c1d10adb PNA |
2801 | |
2802 | err = -ENOMEM; | |
96bcf938 | 2803 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
81378f72 PNA |
2804 | if (skb2 == NULL) { |
2805 | nf_ct_expect_put(exp); | |
c1d10adb | 2806 | goto out; |
81378f72 | 2807 | } |
4e9b8269 | 2808 | |
528a3a6f | 2809 | rcu_read_lock(); |
15e47304 | 2810 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
8b0a231d | 2811 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 2812 | rcu_read_unlock(); |
81378f72 | 2813 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2814 | if (err <= 0) |
2815 | goto free; | |
2816 | ||
15e47304 | 2817 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
81378f72 PNA |
2818 | if (err < 0) |
2819 | goto out; | |
c1d10adb | 2820 | |
81378f72 | 2821 | return 0; |
c1d10adb PNA |
2822 | |
2823 | free: | |
2824 | kfree_skb(skb2); | |
2825 | out: | |
81378f72 PNA |
2826 | /* this avoids a loop in nfnetlink. */ |
2827 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
2828 | } |
2829 | ||
7b8002a1 PNA |
2830 | static int ctnetlink_del_expect(struct net *net, struct sock *ctnl, |
2831 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
2832 | const struct nlattr * const cda[]) | |
c1d10adb | 2833 | { |
31f15875 | 2834 | struct nf_conntrack_expect *exp; |
c1d10adb | 2835 | struct nf_conntrack_tuple tuple; |
96bcf938 | 2836 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
b67bfe0d | 2837 | struct hlist_node *next; |
c1d10adb | 2838 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 2839 | struct nf_conntrack_zone zone; |
31f15875 | 2840 | unsigned int i; |
c1d10adb PNA |
2841 | int err; |
2842 | ||
df6fb868 | 2843 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 2844 | /* delete a single expect by tuple */ |
ef00f89f PM |
2845 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2846 | if (err < 0) | |
2847 | return err; | |
2848 | ||
deedb590 DB |
2849 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
2850 | u3, NULL); | |
c1d10adb PNA |
2851 | if (err < 0) |
2852 | return err; | |
2853 | ||
2854 | /* bump usage count to 2 */ | |
308ac914 | 2855 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
c1d10adb PNA |
2856 | if (!exp) |
2857 | return -ENOENT; | |
2858 | ||
df6fb868 | 2859 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 2860 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 2861 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 2862 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2863 | return -ENOENT; |
2864 | } | |
2865 | } | |
2866 | ||
2867 | /* after list removal, usage count == 1 */ | |
ca7433df | 2868 | spin_lock_bh(&nf_conntrack_expect_lock); |
ebbf41df | 2869 | if (del_timer(&exp->timeout)) { |
15e47304 | 2870 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
ebbf41df PNA |
2871 | nlmsg_report(nlh)); |
2872 | nf_ct_expect_put(exp); | |
2873 | } | |
ca7433df | 2874 | spin_unlock_bh(&nf_conntrack_expect_lock); |
601e68e1 | 2875 | /* have to put what we 'get' above. |
c1d10adb | 2876 | * after this line usage count == 0 */ |
6823645d | 2877 | nf_ct_expect_put(exp); |
df6fb868 PM |
2878 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
2879 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 2880 | struct nf_conn_help *m_help; |
c1d10adb PNA |
2881 | |
2882 | /* delete all expectations for this helper */ | |
ca7433df | 2883 | spin_lock_bh(&nf_conntrack_expect_lock); |
31f15875 | 2884 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
b67bfe0d | 2885 | hlist_for_each_entry_safe(exp, next, |
0a93aaed | 2886 | &nf_ct_expect_hash[i], |
31f15875 | 2887 | hnode) { |
03d7dc5c FW |
2888 | |
2889 | if (!net_eq(nf_ct_exp_net(exp), net)) | |
2890 | continue; | |
2891 | ||
31f15875 | 2892 | m_help = nfct_help(exp->master); |
794e6871 PM |
2893 | if (!strcmp(m_help->helper->name, name) && |
2894 | del_timer(&exp->timeout)) { | |
ebbf41df | 2895 | nf_ct_unlink_expect_report(exp, |
15e47304 | 2896 | NETLINK_CB(skb).portid, |
ebbf41df | 2897 | nlmsg_report(nlh)); |
31f15875 PM |
2898 | nf_ct_expect_put(exp); |
2899 | } | |
c1d10adb PNA |
2900 | } |
2901 | } | |
ca7433df | 2902 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb PNA |
2903 | } else { |
2904 | /* This basically means we have to flush everything*/ | |
ca7433df | 2905 | spin_lock_bh(&nf_conntrack_expect_lock); |
31f15875 | 2906 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
b67bfe0d | 2907 | hlist_for_each_entry_safe(exp, next, |
0a93aaed | 2908 | &nf_ct_expect_hash[i], |
31f15875 | 2909 | hnode) { |
03d7dc5c FW |
2910 | |
2911 | if (!net_eq(nf_ct_exp_net(exp), net)) | |
2912 | continue; | |
2913 | ||
31f15875 | 2914 | if (del_timer(&exp->timeout)) { |
ebbf41df | 2915 | nf_ct_unlink_expect_report(exp, |
15e47304 | 2916 | NETLINK_CB(skb).portid, |
ebbf41df | 2917 | nlmsg_report(nlh)); |
31f15875 PM |
2918 | nf_ct_expect_put(exp); |
2919 | } | |
c1d10adb PNA |
2920 | } |
2921 | } | |
ca7433df | 2922 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb PNA |
2923 | } |
2924 | ||
2925 | return 0; | |
2926 | } | |
2927 | static int | |
39938324 PM |
2928 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
2929 | const struct nlattr * const cda[]) | |
c1d10adb | 2930 | { |
9768e1ac KW |
2931 | if (cda[CTA_EXPECT_TIMEOUT]) { |
2932 | if (!del_timer(&x->timeout)) | |
2933 | return -ETIME; | |
2934 | ||
2935 | x->timeout.expires = jiffies + | |
2936 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
2937 | add_timer(&x->timeout); | |
2938 | } | |
2939 | return 0; | |
c1d10adb PNA |
2940 | } |
2941 | ||
076a0ca0 PNA |
2942 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
2943 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, | |
2944 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, | |
2945 | }; | |
2946 | ||
2947 | static int | |
2948 | ctnetlink_parse_expect_nat(const struct nlattr *attr, | |
2949 | struct nf_conntrack_expect *exp, | |
2950 | u_int8_t u3) | |
2951 | { | |
2952 | #ifdef CONFIG_NF_NAT_NEEDED | |
2953 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; | |
2954 | struct nf_conntrack_tuple nat_tuple = {}; | |
2955 | int err; | |
2956 | ||
130ffbc2 DB |
2957 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy); |
2958 | if (err < 0) | |
2959 | return err; | |
076a0ca0 PNA |
2960 | |
2961 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) | |
2962 | return -EINVAL; | |
2963 | ||
2964 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, | |
deedb590 DB |
2965 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, |
2966 | u3, NULL); | |
076a0ca0 PNA |
2967 | if (err < 0) |
2968 | return err; | |
2969 | ||
c7232c99 | 2970 | exp->saved_addr = nat_tuple.src.u3; |
076a0ca0 PNA |
2971 | exp->saved_proto = nat_tuple.src.u; |
2972 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); | |
2973 | ||
2974 | return 0; | |
2975 | #else | |
2976 | return -EOPNOTSUPP; | |
2977 | #endif | |
2978 | } | |
2979 | ||
0ef71ee1 PNA |
2980 | static struct nf_conntrack_expect * |
2981 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, | |
2982 | struct nf_conntrack_helper *helper, | |
2983 | struct nf_conntrack_tuple *tuple, | |
2984 | struct nf_conntrack_tuple *mask) | |
c1d10adb | 2985 | { |
0ef71ee1 | 2986 | u_int32_t class = 0; |
c1d10adb | 2987 | struct nf_conntrack_expect *exp; |
dc808fe2 | 2988 | struct nf_conn_help *help; |
0ef71ee1 | 2989 | int err; |
660fdb2a | 2990 | |
b8c5e52c PNA |
2991 | if (cda[CTA_EXPECT_CLASS] && helper) { |
2992 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); | |
0ef71ee1 PNA |
2993 | if (class > helper->expect_class_max) |
2994 | return ERR_PTR(-EINVAL); | |
b8c5e52c | 2995 | } |
6823645d | 2996 | exp = nf_ct_expect_alloc(ct); |
0ef71ee1 PNA |
2997 | if (!exp) |
2998 | return ERR_PTR(-ENOMEM); | |
2999 | ||
bc01befd PNA |
3000 | help = nfct_help(ct); |
3001 | if (!help) { | |
3002 | if (!cda[CTA_EXPECT_TIMEOUT]) { | |
3003 | err = -EINVAL; | |
1310b955 | 3004 | goto err_out; |
bc01befd PNA |
3005 | } |
3006 | exp->timeout.expires = | |
3007 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
601e68e1 | 3008 | |
bc01befd PNA |
3009 | exp->flags = NF_CT_EXPECT_USERSPACE; |
3010 | if (cda[CTA_EXPECT_FLAGS]) { | |
3011 | exp->flags |= | |
3012 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
3013 | } | |
3014 | } else { | |
3015 | if (cda[CTA_EXPECT_FLAGS]) { | |
3016 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
3017 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; | |
3018 | } else | |
3019 | exp->flags = 0; | |
3020 | } | |
544d5c7d PNA |
3021 | if (cda[CTA_EXPECT_FN]) { |
3022 | const char *name = nla_data(cda[CTA_EXPECT_FN]); | |
3023 | struct nf_ct_helper_expectfn *expfn; | |
3024 | ||
3025 | expfn = nf_ct_helper_expectfn_find_by_name(name); | |
3026 | if (expfn == NULL) { | |
3027 | err = -EINVAL; | |
3028 | goto err_out; | |
3029 | } | |
3030 | exp->expectfn = expfn->expectfn; | |
3031 | } else | |
3032 | exp->expectfn = NULL; | |
601e68e1 | 3033 | |
b8c5e52c | 3034 | exp->class = class; |
c1d10adb | 3035 | exp->master = ct; |
660fdb2a | 3036 | exp->helper = helper; |
0ef71ee1 PNA |
3037 | exp->tuple = *tuple; |
3038 | exp->mask.src.u3 = mask->src.u3; | |
3039 | exp->mask.src.u.all = mask->src.u.all; | |
c1d10adb | 3040 | |
076a0ca0 PNA |
3041 | if (cda[CTA_EXPECT_NAT]) { |
3042 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], | |
0ef71ee1 | 3043 | exp, nf_ct_l3num(ct)); |
076a0ca0 PNA |
3044 | if (err < 0) |
3045 | goto err_out; | |
3046 | } | |
0ef71ee1 | 3047 | return exp; |
076a0ca0 | 3048 | err_out: |
6823645d | 3049 | nf_ct_expect_put(exp); |
0ef71ee1 PNA |
3050 | return ERR_PTR(err); |
3051 | } | |
3052 | ||
3053 | static int | |
308ac914 DB |
3054 | ctnetlink_create_expect(struct net *net, |
3055 | const struct nf_conntrack_zone *zone, | |
0ef71ee1 PNA |
3056 | const struct nlattr * const cda[], |
3057 | u_int8_t u3, u32 portid, int report) | |
3058 | { | |
3059 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
3060 | struct nf_conntrack_tuple_hash *h = NULL; | |
3061 | struct nf_conntrack_helper *helper = NULL; | |
3062 | struct nf_conntrack_expect *exp; | |
3063 | struct nf_conn *ct; | |
3064 | int err; | |
3065 | ||
3066 | /* caller guarantees that those three CTA_EXPECT_* exist */ | |
deedb590 DB |
3067 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3068 | u3, NULL); | |
0ef71ee1 PNA |
3069 | if (err < 0) |
3070 | return err; | |
deedb590 DB |
3071 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, |
3072 | u3, NULL); | |
0ef71ee1 PNA |
3073 | if (err < 0) |
3074 | return err; | |
deedb590 DB |
3075 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, |
3076 | u3, NULL); | |
0ef71ee1 PNA |
3077 | if (err < 0) |
3078 | return err; | |
3079 | ||
3080 | /* Look for master conntrack of this expectation */ | |
3081 | h = nf_conntrack_find_get(net, zone, &master_tuple); | |
3082 | if (!h) | |
3083 | return -ENOENT; | |
3084 | ct = nf_ct_tuplehash_to_ctrack(h); | |
3085 | ||
3086 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
3087 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
3088 | ||
3089 | helper = __nf_conntrack_helper_find(helpname, u3, | |
3090 | nf_ct_protonum(ct)); | |
3091 | if (helper == NULL) { | |
3092 | #ifdef CONFIG_MODULES | |
3093 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
3094 | err = -EOPNOTSUPP; | |
3095 | goto err_ct; | |
3096 | } | |
3097 | helper = __nf_conntrack_helper_find(helpname, u3, | |
3098 | nf_ct_protonum(ct)); | |
3099 | if (helper) { | |
3100 | err = -EAGAIN; | |
3101 | goto err_ct; | |
3102 | } | |
3103 | #endif | |
3104 | err = -EOPNOTSUPP; | |
3105 | goto err_ct; | |
3106 | } | |
3107 | } | |
3108 | ||
3109 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); | |
3110 | if (IS_ERR(exp)) { | |
3111 | err = PTR_ERR(exp); | |
3112 | goto err_ct; | |
3113 | } | |
3114 | ||
3115 | err = nf_ct_expect_related_report(exp, portid, report); | |
0ef71ee1 PNA |
3116 | nf_ct_expect_put(exp); |
3117 | err_ct: | |
3118 | nf_ct_put(ct); | |
c1d10adb PNA |
3119 | return err; |
3120 | } | |
3121 | ||
7b8002a1 PNA |
3122 | static int ctnetlink_new_expect(struct net *net, struct sock *ctnl, |
3123 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
3124 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
3125 | { |
3126 | struct nf_conntrack_tuple tuple; | |
3127 | struct nf_conntrack_expect *exp; | |
96bcf938 | 3128 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 3129 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 3130 | struct nf_conntrack_zone zone; |
ef00f89f | 3131 | int err; |
c1d10adb | 3132 | |
df6fb868 PM |
3133 | if (!cda[CTA_EXPECT_TUPLE] |
3134 | || !cda[CTA_EXPECT_MASK] | |
3135 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
3136 | return -EINVAL; |
3137 | ||
ef00f89f PM |
3138 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
3139 | if (err < 0) | |
3140 | return err; | |
3141 | ||
deedb590 DB |
3142 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3143 | u3, NULL); | |
c1d10adb PNA |
3144 | if (err < 0) |
3145 | return err; | |
3146 | ||
ca7433df | 3147 | spin_lock_bh(&nf_conntrack_expect_lock); |
308ac914 | 3148 | exp = __nf_ct_expect_find(net, &zone, &tuple); |
c1d10adb | 3149 | if (!exp) { |
ca7433df | 3150 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 3151 | err = -ENOENT; |
19abb7b0 | 3152 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
308ac914 | 3153 | err = ctnetlink_create_expect(net, &zone, cda, u3, |
15e47304 | 3154 | NETLINK_CB(skb).portid, |
19abb7b0 PNA |
3155 | nlmsg_report(nlh)); |
3156 | } | |
c1d10adb PNA |
3157 | return err; |
3158 | } | |
3159 | ||
3160 | err = -EEXIST; | |
3161 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
3162 | err = ctnetlink_change_expect(exp, cda); | |
ca7433df | 3163 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 3164 | |
c1d10adb PNA |
3165 | return err; |
3166 | } | |
3167 | ||
392025f8 | 3168 | static int |
15e47304 | 3169 | ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu, |
392025f8 PNA |
3170 | const struct ip_conntrack_stat *st) |
3171 | { | |
3172 | struct nlmsghdr *nlh; | |
3173 | struct nfgenmsg *nfmsg; | |
15e47304 | 3174 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
3175 | |
3176 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU); | |
15e47304 | 3177 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
3178 | if (nlh == NULL) |
3179 | goto nlmsg_failure; | |
3180 | ||
3181 | nfmsg = nlmsg_data(nlh); | |
3182 | nfmsg->nfgen_family = AF_UNSPEC; | |
3183 | nfmsg->version = NFNETLINK_V0; | |
3184 | nfmsg->res_id = htons(cpu); | |
3185 | ||
3186 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || | |
3187 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || | |
3188 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) | |
3189 | goto nla_put_failure; | |
3190 | ||
3191 | nlmsg_end(skb, nlh); | |
3192 | return skb->len; | |
3193 | ||
3194 | nla_put_failure: | |
3195 | nlmsg_failure: | |
3196 | nlmsg_cancel(skb, nlh); | |
3197 | return -1; | |
3198 | } | |
3199 | ||
3200 | static int | |
3201 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3202 | { | |
3203 | int cpu; | |
3204 | struct net *net = sock_net(skb->sk); | |
3205 | ||
3206 | if (cb->args[0] == nr_cpu_ids) | |
3207 | return 0; | |
3208 | ||
3209 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
3210 | const struct ip_conntrack_stat *st; | |
3211 | ||
3212 | if (!cpu_possible(cpu)) | |
3213 | continue; | |
3214 | ||
3215 | st = per_cpu_ptr(net->ct.stat, cpu); | |
15e47304 | 3216 | if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
3217 | cb->nlh->nlmsg_seq, |
3218 | cpu, st) < 0) | |
3219 | break; | |
3220 | } | |
3221 | cb->args[0] = cpu; | |
3222 | ||
3223 | return skb->len; | |
3224 | } | |
3225 | ||
7b8002a1 PNA |
3226 | static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl, |
3227 | struct sk_buff *skb, | |
3228 | const struct nlmsghdr *nlh, | |
3229 | const struct nlattr * const cda[]) | |
392025f8 PNA |
3230 | { |
3231 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
3232 | struct netlink_dump_control c = { | |
3233 | .dump = ctnetlink_exp_stat_cpu_dump, | |
3234 | }; | |
3235 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
3236 | } | |
3237 | ||
3238 | return 0; | |
3239 | } | |
3240 | ||
c1d10adb | 3241 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
e34d5c1a PNA |
3242 | static struct nf_ct_event_notifier ctnl_notifier = { |
3243 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
3244 | }; |
3245 | ||
e34d5c1a PNA |
3246 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
3247 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
3248 | }; |
3249 | #endif | |
3250 | ||
7c8d4cb4 | 3251 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 3252 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
3253 | .attr_count = CTA_MAX, |
3254 | .policy = ct_nla_policy }, | |
c1d10adb | 3255 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3256 | .attr_count = CTA_MAX, |
3257 | .policy = ct_nla_policy }, | |
c1d10adb | 3258 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
3259 | .attr_count = CTA_MAX, |
3260 | .policy = ct_nla_policy }, | |
c1d10adb | 3261 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3262 | .attr_count = CTA_MAX, |
3263 | .policy = ct_nla_policy }, | |
392025f8 PNA |
3264 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
3265 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, | |
d871befe PNA |
3266 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
3267 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, | |
c1d10adb PNA |
3268 | }; |
3269 | ||
7c8d4cb4 | 3270 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 3271 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
3272 | .attr_count = CTA_EXPECT_MAX, |
3273 | .policy = exp_nla_policy }, | |
c1d10adb | 3274 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
3275 | .attr_count = CTA_EXPECT_MAX, |
3276 | .policy = exp_nla_policy }, | |
c1d10adb | 3277 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
3278 | .attr_count = CTA_EXPECT_MAX, |
3279 | .policy = exp_nla_policy }, | |
392025f8 | 3280 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
c1d10adb PNA |
3281 | }; |
3282 | ||
7c8d4cb4 | 3283 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
3284 | .name = "conntrack", |
3285 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
3286 | .cb_count = IPCTNL_MSG_MAX, | |
3287 | .cb = ctnl_cb, | |
3288 | }; | |
3289 | ||
7c8d4cb4 | 3290 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
3291 | .name = "conntrack_expect", |
3292 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
3293 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
3294 | .cb = ctnl_exp_cb, | |
3295 | }; | |
3296 | ||
d2483dde | 3297 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 3298 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 3299 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb | 3300 | |
70e9942f PNA |
3301 | static int __net_init ctnetlink_net_init(struct net *net) |
3302 | { | |
3303 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3304 | int ret; | |
3305 | ||
3306 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); | |
3307 | if (ret < 0) { | |
3308 | pr_err("ctnetlink_init: cannot register notifier.\n"); | |
3309 | goto err_out; | |
3310 | } | |
3311 | ||
3312 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); | |
3313 | if (ret < 0) { | |
3314 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); | |
3315 | goto err_unreg_notifier; | |
3316 | } | |
3317 | #endif | |
3318 | return 0; | |
3319 | ||
3320 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3321 | err_unreg_notifier: | |
3322 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3323 | err_out: | |
3324 | return ret; | |
3325 | #endif | |
3326 | } | |
3327 | ||
3328 | static void ctnetlink_net_exit(struct net *net) | |
3329 | { | |
3330 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3331 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); | |
3332 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3333 | #endif | |
3334 | } | |
3335 | ||
3336 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) | |
3337 | { | |
3338 | struct net *net; | |
3339 | ||
3340 | list_for_each_entry(net, net_exit_list, exit_list) | |
3341 | ctnetlink_net_exit(net); | |
3342 | } | |
3343 | ||
3344 | static struct pernet_operations ctnetlink_net_ops = { | |
3345 | .init = ctnetlink_net_init, | |
3346 | .exit_batch = ctnetlink_net_exit_batch, | |
3347 | }; | |
3348 | ||
c1d10adb PNA |
3349 | static int __init ctnetlink_init(void) |
3350 | { | |
3351 | int ret; | |
3352 | ||
654d0fbd | 3353 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
c1d10adb PNA |
3354 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
3355 | if (ret < 0) { | |
654d0fbd | 3356 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
c1d10adb PNA |
3357 | goto err_out; |
3358 | } | |
3359 | ||
3360 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
3361 | if (ret < 0) { | |
654d0fbd | 3362 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
c1d10adb PNA |
3363 | goto err_unreg_subsys; |
3364 | } | |
3365 | ||
ef6acf68 JL |
3366 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
3367 | if (ret < 0) { | |
70e9942f | 3368 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
c1d10adb PNA |
3369 | goto err_unreg_exp_subsys; |
3370 | } | |
83f3e94d | 3371 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
9cb01766 | 3372 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
a4b4766c | 3373 | RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook); |
9cb01766 | 3374 | #endif |
c1d10adb PNA |
3375 | return 0; |
3376 | ||
c1d10adb PNA |
3377 | err_unreg_exp_subsys: |
3378 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
c1d10adb PNA |
3379 | err_unreg_subsys: |
3380 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
3381 | err_out: | |
3382 | return ret; | |
3383 | } | |
3384 | ||
3385 | static void __exit ctnetlink_exit(void) | |
3386 | { | |
654d0fbd | 3387 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
c1d10adb | 3388 | |
70e9942f | 3389 | unregister_pernet_subsys(&ctnetlink_net_ops); |
c1d10adb PNA |
3390 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
3391 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
83f3e94d | 3392 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
a4b4766c | 3393 | RCU_INIT_POINTER(nfnl_ct_hook, NULL); |
9cb01766 | 3394 | #endif |
c1d10adb PNA |
3395 | } |
3396 | ||
3397 | module_init(ctnetlink_init); | |
3398 | module_exit(ctnetlink_exit); |