Commit | Line | Data |
---|---|---|
c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
392025f8 | 7 | * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
1cc63249 | 25 | #include <linux/security.h> |
c1d10adb PNA |
26 | #include <linux/skbuff.h> |
27 | #include <linux/errno.h> | |
28 | #include <linux/netlink.h> | |
29 | #include <linux/spinlock.h> | |
40a839fd | 30 | #include <linux/interrupt.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
c1d10adb PNA |
32 | |
33 | #include <linux/netfilter.h> | |
dc5fc579 | 34 | #include <net/netlink.h> |
9592a5c0 | 35 | #include <net/sock.h> |
c1d10adb PNA |
36 | #include <net/netfilter/nf_conntrack.h> |
37 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 38 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb | 39 | #include <net/netfilter/nf_conntrack_helper.h> |
41d73ec0 | 40 | #include <net/netfilter/nf_conntrack_seqadj.h> |
c1d10adb | 41 | #include <net/netfilter/nf_conntrack_l3proto.h> |
605dcad6 | 42 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 43 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 44 | #include <net/netfilter/nf_conntrack_acct.h> |
ef00f89f | 45 | #include <net/netfilter/nf_conntrack_zones.h> |
a992ca2a | 46 | #include <net/netfilter/nf_conntrack_timestamp.h> |
c539f017 | 47 | #include <net/netfilter/nf_conntrack_labels.h> |
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 | |
c1d10adb | 61 | static inline int |
601e68e1 | 62 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 63 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 64 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 65 | { |
c1d10adb | 66 | int ret = 0; |
df6fb868 | 67 | struct nlattr *nest_parms; |
c1d10adb | 68 | |
df6fb868 PM |
69 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
70 | if (!nest_parms) | |
71 | goto nla_put_failure; | |
cc1eb431 DM |
72 | if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum)) |
73 | goto nla_put_failure; | |
c1d10adb | 74 | |
fdf70832 PM |
75 | if (likely(l4proto->tuple_to_nlattr)) |
76 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 77 | |
df6fb868 | 78 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
79 | |
80 | return ret; | |
81 | ||
df6fb868 | 82 | nla_put_failure: |
c1d10adb PNA |
83 | return -1; |
84 | } | |
85 | ||
86 | static inline int | |
1cde6436 PNA |
87 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
88 | const struct nf_conntrack_tuple *tuple, | |
89 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 90 | { |
c1d10adb | 91 | int ret = 0; |
df6fb868 PM |
92 | struct nlattr *nest_parms; |
93 | ||
94 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
95 | if (!nest_parms) | |
96 | goto nla_put_failure; | |
1cde6436 | 97 | |
fdf70832 PM |
98 | if (likely(l3proto->tuple_to_nlattr)) |
99 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 100 | |
df6fb868 | 101 | nla_nest_end(skb, nest_parms); |
c1d10adb | 102 | |
1cde6436 PNA |
103 | return ret; |
104 | ||
df6fb868 | 105 | nla_put_failure: |
1cde6436 PNA |
106 | return -1; |
107 | } | |
108 | ||
bb5cf80e | 109 | static int |
1cde6436 PNA |
110 | ctnetlink_dump_tuples(struct sk_buff *skb, |
111 | const struct nf_conntrack_tuple *tuple) | |
112 | { | |
113 | int ret; | |
114 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 115 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 116 | |
3b988ece | 117 | rcu_read_lock(); |
528a3a6f | 118 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 119 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb | 120 | |
3b988ece HS |
121 | if (ret >= 0) { |
122 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
123 | tuple->dst.protonum); | |
124 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); | |
125 | } | |
126 | rcu_read_unlock(); | |
c1d10adb | 127 | return ret; |
c1d10adb PNA |
128 | } |
129 | ||
130 | static inline int | |
131 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
132 | { | |
cc1eb431 DM |
133 | if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status))) |
134 | goto nla_put_failure; | |
c1d10adb PNA |
135 | return 0; |
136 | ||
df6fb868 | 137 | nla_put_failure: |
c1d10adb PNA |
138 | return -1; |
139 | } | |
140 | ||
141 | static inline int | |
142 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
143 | { | |
c1216382 | 144 | long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ; |
c1d10adb | 145 | |
77236b6e | 146 | if (timeout < 0) |
c1d10adb | 147 | timeout = 0; |
601e68e1 | 148 | |
cc1eb431 DM |
149 | if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout))) |
150 | goto nla_put_failure; | |
c1d10adb PNA |
151 | return 0; |
152 | ||
df6fb868 | 153 | nla_put_failure: |
c1d10adb PNA |
154 | return -1; |
155 | } | |
156 | ||
157 | static inline int | |
440f0d58 | 158 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 159 | { |
5e8fbe2a | 160 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 161 | struct nlattr *nest_proto; |
c1d10adb PNA |
162 | int ret; |
163 | ||
528a3a6f PNA |
164 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
165 | if (!l4proto->to_nlattr) | |
c1d10adb | 166 | return 0; |
601e68e1 | 167 | |
df6fb868 PM |
168 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
169 | if (!nest_proto) | |
170 | goto nla_put_failure; | |
c1d10adb | 171 | |
fdf70832 | 172 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 173 | |
df6fb868 | 174 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
175 | |
176 | return ret; | |
177 | ||
df6fb868 | 178 | nla_put_failure: |
c1d10adb PNA |
179 | return -1; |
180 | } | |
181 | ||
182 | static inline int | |
183 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
184 | { | |
df6fb868 | 185 | struct nlattr *nest_helper; |
dc808fe2 | 186 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 187 | struct nf_conntrack_helper *helper; |
c1d10adb | 188 | |
3c158f7f | 189 | if (!help) |
c1d10adb | 190 | return 0; |
601e68e1 | 191 | |
3c158f7f PM |
192 | helper = rcu_dereference(help->helper); |
193 | if (!helper) | |
194 | goto out; | |
195 | ||
df6fb868 PM |
196 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
197 | if (!nest_helper) | |
198 | goto nla_put_failure; | |
cc1eb431 DM |
199 | if (nla_put_string(skb, CTA_HELP_NAME, helper->name)) |
200 | goto nla_put_failure; | |
c1d10adb | 201 | |
fdf70832 PM |
202 | if (helper->to_nlattr) |
203 | helper->to_nlattr(skb, ct); | |
c1d10adb | 204 | |
df6fb868 | 205 | nla_nest_end(skb, nest_helper); |
3c158f7f | 206 | out: |
c1d10adb PNA |
207 | return 0; |
208 | ||
df6fb868 | 209 | nla_put_failure: |
c1d10adb PNA |
210 | return -1; |
211 | } | |
212 | ||
bb5cf80e | 213 | static int |
4542fa47 HE |
214 | dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct, |
215 | enum ip_conntrack_dir dir, int type) | |
c1d10adb | 216 | { |
4542fa47 HE |
217 | enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
218 | struct nf_conn_counter *counter = acct->counter; | |
df6fb868 | 219 | struct nlattr *nest_count; |
4542fa47 | 220 | u64 pkts, bytes; |
c1d10adb | 221 | |
4542fa47 HE |
222 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
223 | pkts = atomic64_xchg(&counter[dir].packets, 0); | |
224 | bytes = atomic64_xchg(&counter[dir].bytes, 0); | |
225 | } else { | |
226 | pkts = atomic64_read(&counter[dir].packets); | |
227 | bytes = atomic64_read(&counter[dir].bytes); | |
228 | } | |
229 | ||
230 | nest_count = nla_nest_start(skb, attr | NLA_F_NESTED); | |
df6fb868 PM |
231 | if (!nest_count) |
232 | goto nla_put_failure; | |
233 | ||
cc1eb431 DM |
234 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) || |
235 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes))) | |
236 | goto nla_put_failure; | |
c1d10adb | 237 | |
df6fb868 | 238 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
239 | |
240 | return 0; | |
241 | ||
df6fb868 | 242 | nla_put_failure: |
c1d10adb PNA |
243 | return -1; |
244 | } | |
c1d10adb | 245 | |
80e60e67 | 246 | static int |
4542fa47 | 247 | ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type) |
80e60e67 | 248 | { |
4542fa47 | 249 | struct nf_conn_acct *acct = nf_conn_acct_find(ct); |
80e60e67 | 250 | |
80e60e67 PNA |
251 | if (!acct) |
252 | return 0; | |
253 | ||
4542fa47 HE |
254 | if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0) |
255 | return -1; | |
256 | if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0) | |
257 | return -1; | |
258 | ||
259 | return 0; | |
80e60e67 PNA |
260 | } |
261 | ||
a992ca2a PNA |
262 | static int |
263 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) | |
264 | { | |
265 | struct nlattr *nest_count; | |
266 | const struct nf_conn_tstamp *tstamp; | |
267 | ||
268 | tstamp = nf_conn_tstamp_find(ct); | |
269 | if (!tstamp) | |
270 | return 0; | |
271 | ||
272 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); | |
273 | if (!nest_count) | |
274 | goto nla_put_failure; | |
275 | ||
cc1eb431 DM |
276 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) || |
277 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, | |
278 | cpu_to_be64(tstamp->stop)))) | |
279 | goto nla_put_failure; | |
a992ca2a PNA |
280 | nla_nest_end(skb, nest_count); |
281 | ||
282 | return 0; | |
283 | ||
284 | nla_put_failure: | |
285 | return -1; | |
286 | } | |
287 | ||
c1d10adb PNA |
288 | #ifdef CONFIG_NF_CONNTRACK_MARK |
289 | static inline int | |
290 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
291 | { | |
cc1eb431 DM |
292 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
293 | goto nla_put_failure; | |
c1d10adb PNA |
294 | return 0; |
295 | ||
df6fb868 | 296 | nla_put_failure: |
c1d10adb PNA |
297 | return -1; |
298 | } | |
299 | #else | |
300 | #define ctnetlink_dump_mark(a, b) (0) | |
301 | #endif | |
302 | ||
37fccd85 PNA |
303 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
304 | static inline int | |
1cc63249 | 305 | ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) |
37fccd85 | 306 | { |
1cc63249 EP |
307 | struct nlattr *nest_secctx; |
308 | int len, ret; | |
309 | char *secctx; | |
310 | ||
311 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
312 | if (ret) | |
cba85b53 | 313 | return 0; |
1cc63249 EP |
314 | |
315 | ret = -1; | |
316 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); | |
317 | if (!nest_secctx) | |
318 | goto nla_put_failure; | |
37fccd85 | 319 | |
cc1eb431 DM |
320 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
321 | goto nla_put_failure; | |
1cc63249 EP |
322 | nla_nest_end(skb, nest_secctx); |
323 | ||
324 | ret = 0; | |
37fccd85 | 325 | nla_put_failure: |
1cc63249 EP |
326 | security_release_secctx(secctx, len); |
327 | return ret; | |
37fccd85 PNA |
328 | } |
329 | #else | |
1cc63249 | 330 | #define ctnetlink_dump_secctx(a, b) (0) |
37fccd85 PNA |
331 | #endif |
332 | ||
0ceabd83 FW |
333 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
334 | static int ctnetlink_label_size(const struct nf_conn *ct) | |
335 | { | |
336 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
337 | ||
338 | if (!labels) | |
339 | return 0; | |
340 | return nla_total_size(labels->words * sizeof(long)); | |
341 | } | |
342 | ||
343 | static int | |
344 | ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) | |
345 | { | |
346 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
347 | unsigned int len, i; | |
348 | ||
349 | if (!labels) | |
350 | return 0; | |
351 | ||
352 | len = labels->words * sizeof(long); | |
353 | i = 0; | |
354 | do { | |
355 | if (labels->bits[i] != 0) | |
356 | return nla_put(skb, CTA_LABELS, len, labels->bits); | |
357 | i++; | |
358 | } while (i < labels->words); | |
359 | ||
360 | return 0; | |
361 | } | |
362 | #else | |
363 | #define ctnetlink_dump_labels(a, b) (0) | |
364 | #define ctnetlink_label_size(a) (0) | |
365 | #endif | |
366 | ||
0f417ce9 PNA |
367 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
368 | ||
369 | static inline int | |
370 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
371 | { | |
372 | struct nlattr *nest_parms; | |
373 | ||
374 | if (!(ct->status & IPS_EXPECTED)) | |
375 | return 0; | |
376 | ||
377 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
378 | if (!nest_parms) | |
379 | goto nla_put_failure; | |
380 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
381 | goto nla_put_failure; | |
382 | nla_nest_end(skb, nest_parms); | |
383 | ||
384 | return 0; | |
385 | ||
386 | nla_put_failure: | |
387 | return -1; | |
388 | } | |
389 | ||
bb5cf80e | 390 | static int |
41d73ec0 | 391 | dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type) |
13eae15a | 392 | { |
13eae15a PNA |
393 | struct nlattr *nest_parms; |
394 | ||
395 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
396 | if (!nest_parms) | |
397 | goto nla_put_failure; | |
398 | ||
41d73ec0 PM |
399 | if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS, |
400 | htonl(seq->correction_pos)) || | |
401 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE, | |
402 | htonl(seq->offset_before)) || | |
403 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER, | |
404 | htonl(seq->offset_after))) | |
cc1eb431 | 405 | goto nla_put_failure; |
13eae15a PNA |
406 | |
407 | nla_nest_end(skb, nest_parms); | |
408 | ||
409 | return 0; | |
410 | ||
411 | nla_put_failure: | |
412 | return -1; | |
413 | } | |
414 | ||
415 | static inline int | |
41d73ec0 | 416 | ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) |
13eae15a | 417 | { |
41d73ec0 PM |
418 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
419 | struct nf_ct_seqadj *seq; | |
13eae15a | 420 | |
41d73ec0 | 421 | if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj) |
13eae15a PNA |
422 | return 0; |
423 | ||
41d73ec0 PM |
424 | seq = &seqadj->seq[IP_CT_DIR_ORIGINAL]; |
425 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1) | |
13eae15a PNA |
426 | return -1; |
427 | ||
41d73ec0 PM |
428 | seq = &seqadj->seq[IP_CT_DIR_REPLY]; |
429 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1) | |
13eae15a PNA |
430 | return -1; |
431 | ||
432 | return 0; | |
433 | } | |
13eae15a | 434 | |
c1d10adb PNA |
435 | static inline int |
436 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
437 | { | |
cc1eb431 DM |
438 | if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct))) |
439 | goto nla_put_failure; | |
c1d10adb PNA |
440 | return 0; |
441 | ||
df6fb868 | 442 | nla_put_failure: |
c1d10adb PNA |
443 | return -1; |
444 | } | |
445 | ||
446 | static inline int | |
447 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
448 | { | |
cc1eb431 DM |
449 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
450 | goto nla_put_failure; | |
c1d10adb PNA |
451 | return 0; |
452 | ||
df6fb868 | 453 | nla_put_failure: |
c1d10adb PNA |
454 | return -1; |
455 | } | |
456 | ||
c1d10adb | 457 | static int |
15e47304 | 458 | ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
80e60e67 | 459 | struct nf_conn *ct) |
c1d10adb PNA |
460 | { |
461 | struct nlmsghdr *nlh; | |
462 | struct nfgenmsg *nfmsg; | |
df6fb868 | 463 | struct nlattr *nest_parms; |
15e47304 | 464 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
c1d10adb | 465 | |
80e60e67 | 466 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW); |
15e47304 | 467 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
468 | if (nlh == NULL) |
469 | goto nlmsg_failure; | |
c1d10adb | 470 | |
96bcf938 | 471 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 472 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
473 | nfmsg->version = NFNETLINK_V0; |
474 | nfmsg->res_id = 0; | |
475 | ||
df6fb868 PM |
476 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
477 | if (!nest_parms) | |
478 | goto nla_put_failure; | |
f2f3e38c | 479 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
480 | goto nla_put_failure; |
481 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 482 | |
df6fb868 PM |
483 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
484 | if (!nest_parms) | |
485 | goto nla_put_failure; | |
f2f3e38c | 486 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
487 | goto nla_put_failure; |
488 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 489 | |
cc1eb431 DM |
490 | if (nf_ct_zone(ct) && |
491 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) | |
492 | goto nla_put_failure; | |
ef00f89f | 493 | |
c1d10adb PNA |
494 | if (ctnetlink_dump_status(skb, ct) < 0 || |
495 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
4542fa47 | 496 | ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 497 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
c1d10adb PNA |
498 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
499 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
500 | ctnetlink_dump_mark(skb, ct) < 0 || | |
1cc63249 | 501 | ctnetlink_dump_secctx(skb, ct) < 0 || |
0ceabd83 | 502 | ctnetlink_dump_labels(skb, ct) < 0 || |
c1d10adb | 503 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 504 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 505 | ctnetlink_dump_master(skb, ct) < 0 || |
41d73ec0 | 506 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
df6fb868 | 507 | goto nla_put_failure; |
c1d10adb | 508 | |
96bcf938 | 509 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
510 | return skb->len; |
511 | ||
512 | nlmsg_failure: | |
df6fb868 | 513 | nla_put_failure: |
96bcf938 | 514 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
515 | return -1; |
516 | } | |
517 | ||
03b64f51 PNA |
518 | static inline size_t |
519 | ctnetlink_proto_size(const struct nf_conn *ct) | |
2732c4e4 HE |
520 | { |
521 | struct nf_conntrack_l3proto *l3proto; | |
522 | struct nf_conntrack_l4proto *l4proto; | |
03b64f51 PNA |
523 | size_t len = 0; |
524 | ||
525 | rcu_read_lock(); | |
526 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); | |
527 | len += l3proto->nla_size; | |
528 | ||
529 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
530 | len += l4proto->nla_size; | |
531 | rcu_read_unlock(); | |
532 | ||
533 | return len; | |
534 | } | |
535 | ||
d26e6a02 | 536 | static inline size_t |
f7b13e43 | 537 | ctnetlink_acct_size(const struct nf_conn *ct) |
d26e6a02 JP |
538 | { |
539 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) | |
540 | return 0; | |
541 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ | |
542 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ | |
543 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
544 | ; | |
545 | } | |
546 | ||
cba85b53 PNA |
547 | static inline int |
548 | ctnetlink_secctx_size(const struct nf_conn *ct) | |
1cc63249 | 549 | { |
cba85b53 PNA |
550 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
551 | int len, ret; | |
1cc63249 | 552 | |
cba85b53 PNA |
553 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
554 | if (ret) | |
555 | return 0; | |
1cc63249 | 556 | |
cba85b53 PNA |
557 | return nla_total_size(0) /* CTA_SECCTX */ |
558 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ | |
559 | #else | |
560 | return 0; | |
1cc63249 | 561 | #endif |
cba85b53 | 562 | } |
1cc63249 | 563 | |
a992ca2a PNA |
564 | static inline size_t |
565 | ctnetlink_timestamp_size(const struct nf_conn *ct) | |
566 | { | |
567 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
568 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) | |
569 | return 0; | |
570 | return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t)); | |
571 | #else | |
572 | return 0; | |
573 | #endif | |
574 | } | |
575 | ||
03b64f51 PNA |
576 | static inline size_t |
577 | ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
578 | { | |
579 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
580 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
581 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
582 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
583 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
584 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
585 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
f7b13e43 | 586 | + ctnetlink_acct_size(ct) |
a992ca2a | 587 | + ctnetlink_timestamp_size(ct) |
03b64f51 PNA |
588 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
589 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
590 | + nla_total_size(0) /* CTA_HELP */ | |
591 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
cba85b53 | 592 | + ctnetlink_secctx_size(ct) |
d271e8bd | 593 | #ifdef CONFIG_NF_NAT_NEEDED |
03b64f51 PNA |
594 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
595 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
596 | #endif |
597 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 598 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
d271e8bd | 599 | #endif |
03b64f51 | 600 | + ctnetlink_proto_size(ct) |
0ceabd83 | 601 | + ctnetlink_label_size(ct) |
03b64f51 | 602 | ; |
2732c4e4 HE |
603 | } |
604 | ||
8e36c4b5 | 605 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
e34d5c1a PNA |
606 | static int |
607 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb | 608 | { |
9592a5c0 | 609 | struct net *net; |
c1d10adb PNA |
610 | struct nlmsghdr *nlh; |
611 | struct nfgenmsg *nfmsg; | |
df6fb868 | 612 | struct nlattr *nest_parms; |
19abb7b0 | 613 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
614 | struct sk_buff *skb; |
615 | unsigned int type; | |
c1d10adb | 616 | unsigned int flags = 0, group; |
dd7669a9 | 617 | int err; |
c1d10adb PNA |
618 | |
619 | /* ignore our fake conntrack entry */ | |
5bfddbd4 | 620 | if (nf_ct_is_untracked(ct)) |
e34d5c1a | 621 | return 0; |
c1d10adb | 622 | |
a0891aa6 | 623 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
624 | type = IPCTNL_MSG_CT_DELETE; |
625 | group = NFNLGRP_CONNTRACK_DESTROY; | |
a0891aa6 | 626 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
627 | type = IPCTNL_MSG_CT_NEW; |
628 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 629 | group = NFNLGRP_CONNTRACK_NEW; |
17e6e4ea | 630 | } else if (events) { |
c1d10adb PNA |
631 | type = IPCTNL_MSG_CT_NEW; |
632 | group = NFNLGRP_CONNTRACK_UPDATE; | |
633 | } else | |
e34d5c1a | 634 | return 0; |
a2427692 | 635 | |
9592a5c0 AD |
636 | net = nf_ct_net(ct); |
637 | if (!item->report && !nfnetlink_has_listeners(net, group)) | |
e34d5c1a | 638 | return 0; |
a2427692 | 639 | |
03b64f51 PNA |
640 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
641 | if (skb == NULL) | |
150ace0d | 642 | goto errout; |
c1d10adb | 643 | |
c1d10adb | 644 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
15e47304 | 645 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
646 | if (nlh == NULL) |
647 | goto nlmsg_failure; | |
c1d10adb | 648 | |
96bcf938 | 649 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 650 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
651 | nfmsg->version = NFNETLINK_V0; |
652 | nfmsg->res_id = 0; | |
653 | ||
528a3a6f | 654 | rcu_read_lock(); |
df6fb868 PM |
655 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
656 | if (!nest_parms) | |
657 | goto nla_put_failure; | |
f2f3e38c | 658 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
659 | goto nla_put_failure; |
660 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 661 | |
df6fb868 PM |
662 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
663 | if (!nest_parms) | |
664 | goto nla_put_failure; | |
f2f3e38c | 665 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
666 | goto nla_put_failure; |
667 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 668 | |
cc1eb431 DM |
669 | if (nf_ct_zone(ct) && |
670 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) | |
671 | goto nla_put_failure; | |
ef00f89f | 672 | |
1eedf699 EL |
673 | if (ctnetlink_dump_id(skb, ct) < 0) |
674 | goto nla_put_failure; | |
675 | ||
e57dce60 FH |
676 | if (ctnetlink_dump_status(skb, ct) < 0) |
677 | goto nla_put_failure; | |
678 | ||
a0891aa6 | 679 | if (events & (1 << IPCT_DESTROY)) { |
4542fa47 | 680 | if (ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 681 | ctnetlink_dump_timestamp(skb, ct) < 0) |
df6fb868 | 682 | goto nla_put_failure; |
7b621c1e | 683 | } else { |
7b621c1e | 684 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 685 | goto nla_put_failure; |
7b621c1e | 686 | |
a0891aa6 | 687 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 688 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 689 | goto nla_put_failure; |
7b621c1e | 690 | |
a0891aa6 | 691 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 692 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 693 | goto nla_put_failure; |
7b621c1e | 694 | |
ff660c80 | 695 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 696 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
1cc63249 | 697 | && ctnetlink_dump_secctx(skb, ct) < 0) |
37fccd85 | 698 | goto nla_put_failure; |
ff660c80 | 699 | #endif |
0ceabd83 FW |
700 | if (events & (1 << IPCT_LABEL) && |
701 | ctnetlink_dump_labels(skb, ct) < 0) | |
702 | goto nla_put_failure; | |
7b621c1e | 703 | |
a0891aa6 | 704 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
705 | ctnetlink_dump_master(skb, ct) < 0) |
706 | goto nla_put_failure; | |
707 | ||
41d73ec0 PM |
708 | if (events & (1 << IPCT_SEQADJ) && |
709 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) | |
13eae15a | 710 | goto nla_put_failure; |
7b621c1e | 711 | } |
b9a37e0c | 712 | |
a83099a6 | 713 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 714 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
715 | && ctnetlink_dump_mark(skb, ct) < 0) |
716 | goto nla_put_failure; | |
717 | #endif | |
528a3a6f | 718 | rcu_read_unlock(); |
a83099a6 | 719 | |
96bcf938 | 720 | nlmsg_end(skb, nlh); |
15e47304 | 721 | err = nfnetlink_send(skb, net, item->portid, group, item->report, |
cd8c20b6 | 722 | GFP_ATOMIC); |
dd7669a9 PNA |
723 | if (err == -ENOBUFS || err == -EAGAIN) |
724 | return -ENOBUFS; | |
725 | ||
e34d5c1a | 726 | return 0; |
c1d10adb | 727 | |
df6fb868 | 728 | nla_put_failure: |
528a3a6f | 729 | rcu_read_unlock(); |
96bcf938 | 730 | nlmsg_cancel(skb, nlh); |
528a3a6f | 731 | nlmsg_failure: |
c1d10adb | 732 | kfree_skb(skb); |
150ace0d | 733 | errout: |
37b7ef72 PNA |
734 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
735 | return -ENOBUFS; | |
736 | ||
e34d5c1a | 737 | return 0; |
c1d10adb PNA |
738 | } |
739 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
740 | ||
741 | static int ctnetlink_done(struct netlink_callback *cb) | |
742 | { | |
89f2e218 PM |
743 | if (cb->args[1]) |
744 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
0f298a28 PNA |
745 | if (cb->data) |
746 | kfree(cb->data); | |
c1d10adb PNA |
747 | return 0; |
748 | } | |
749 | ||
0f298a28 PNA |
750 | struct ctnetlink_dump_filter { |
751 | struct { | |
752 | u_int32_t val; | |
753 | u_int32_t mask; | |
754 | } mark; | |
755 | }; | |
756 | ||
c1d10adb PNA |
757 | static int |
758 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
759 | { | |
9592a5c0 | 760 | struct net *net = sock_net(skb->sk); |
89f2e218 | 761 | struct nf_conn *ct, *last; |
c1d10adb | 762 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 763 | struct hlist_nulls_node *n; |
96bcf938 | 764 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 765 | u_int8_t l3proto = nfmsg->nfgen_family; |
3b988ece | 766 | int res; |
93bb0ceb JDB |
767 | spinlock_t *lockp; |
768 | ||
0f298a28 PNA |
769 | #ifdef CONFIG_NF_CONNTRACK_MARK |
770 | const struct ctnetlink_dump_filter *filter = cb->data; | |
771 | #endif | |
3b988ece | 772 | |
d205dc40 | 773 | last = (struct nf_conn *)cb->args[1]; |
93bb0ceb JDB |
774 | |
775 | local_bh_disable(); | |
9ab99d5a | 776 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
89f2e218 | 777 | restart: |
93bb0ceb JDB |
778 | lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS]; |
779 | spin_lock(lockp); | |
780 | if (cb->args[0] >= net->ct.htable_size) { | |
781 | spin_unlock(lockp); | |
782 | goto out; | |
783 | } | |
13ee6ac5 | 784 | hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]], |
ea781f19 | 785 | hnnode) { |
5b1158e9 | 786 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
787 | continue; |
788 | ct = nf_ct_tuplehash_to_ctrack(h); | |
87711cb8 PNA |
789 | /* Dump entries of a given L3 protocol number. |
790 | * If it is not specified, ie. l3proto == 0, | |
791 | * then dump everything. */ | |
5e8fbe2a | 792 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
13ee6ac5 | 793 | continue; |
d205dc40 PM |
794 | if (cb->args[1]) { |
795 | if (ct != last) | |
13ee6ac5 | 796 | continue; |
d205dc40 | 797 | cb->args[1] = 0; |
89f2e218 | 798 | } |
0f298a28 PNA |
799 | #ifdef CONFIG_NF_CONNTRACK_MARK |
800 | if (filter && !((ct->mark & filter->mark.mask) == | |
801 | filter->mark.val)) { | |
802 | continue; | |
803 | } | |
804 | #endif | |
3b988ece HS |
805 | rcu_read_lock(); |
806 | res = | |
15e47304 | 807 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
3b988ece HS |
808 | cb->nlh->nlmsg_seq, |
809 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
810 | ct); | |
811 | rcu_read_unlock(); | |
812 | if (res < 0) { | |
c71caf41 | 813 | nf_conntrack_get(&ct->ct_general); |
89f2e218 | 814 | cb->args[1] = (unsigned long)ct; |
93bb0ceb | 815 | spin_unlock(lockp); |
c1d10adb | 816 | goto out; |
89f2e218 PM |
817 | } |
818 | } | |
93bb0ceb | 819 | spin_unlock(lockp); |
d205dc40 | 820 | if (cb->args[1]) { |
89f2e218 PM |
821 | cb->args[1] = 0; |
822 | goto restart; | |
c1d10adb PNA |
823 | } |
824 | } | |
89f2e218 | 825 | out: |
93bb0ceb | 826 | local_bh_enable(); |
d205dc40 PM |
827 | if (last) |
828 | nf_ct_put(last); | |
c1d10adb | 829 | |
c1d10adb PNA |
830 | return skb->len; |
831 | } | |
832 | ||
c1d10adb | 833 | static inline int |
df6fb868 | 834 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 835 | { |
df6fb868 | 836 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
837 | struct nf_conntrack_l3proto *l3proto; |
838 | int ret = 0; | |
839 | ||
130ffbc2 DB |
840 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
841 | if (ret < 0) | |
842 | return ret; | |
c1d10adb | 843 | |
cd91566e FW |
844 | rcu_read_lock(); |
845 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 846 | |
f73e924c PM |
847 | if (likely(l3proto->nlattr_to_tuple)) { |
848 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
849 | l3proto->nla_policy); | |
850 | if (ret == 0) | |
851 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
852 | } | |
c1d10adb | 853 | |
cd91566e | 854 | rcu_read_unlock(); |
c1d10adb | 855 | |
c1d10adb PNA |
856 | return ret; |
857 | } | |
858 | ||
f73e924c PM |
859 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
860 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
861 | }; |
862 | ||
863 | static inline int | |
df6fb868 | 864 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
865 | struct nf_conntrack_tuple *tuple) |
866 | { | |
df6fb868 | 867 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 868 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
869 | int ret = 0; |
870 | ||
f73e924c PM |
871 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
872 | if (ret < 0) | |
873 | return ret; | |
c1d10adb | 874 | |
df6fb868 | 875 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 876 | return -EINVAL; |
77236b6e | 877 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 878 | |
cd91566e FW |
879 | rcu_read_lock(); |
880 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 881 | |
f73e924c PM |
882 | if (likely(l4proto->nlattr_to_tuple)) { |
883 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
884 | l4proto->nla_policy); | |
885 | if (ret == 0) | |
886 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
887 | } | |
c1d10adb | 888 | |
cd91566e | 889 | rcu_read_unlock(); |
601e68e1 | 890 | |
c1d10adb PNA |
891 | return ret; |
892 | } | |
893 | ||
d0b0268f PM |
894 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
895 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
896 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
897 | }; | |
898 | ||
bb5cf80e | 899 | static int |
39938324 PM |
900 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
901 | struct nf_conntrack_tuple *tuple, | |
a00f1f36 | 902 | enum ctattr_type type, u_int8_t l3num) |
c1d10adb | 903 | { |
df6fb868 | 904 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
905 | int err; |
906 | ||
c1d10adb PNA |
907 | memset(tuple, 0, sizeof(*tuple)); |
908 | ||
130ffbc2 DB |
909 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
910 | if (err < 0) | |
911 | return err; | |
c1d10adb | 912 | |
df6fb868 | 913 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
914 | return -EINVAL; |
915 | ||
916 | tuple->src.l3num = l3num; | |
917 | ||
df6fb868 | 918 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
919 | if (err < 0) |
920 | return err; | |
921 | ||
df6fb868 | 922 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
923 | return -EINVAL; |
924 | ||
df6fb868 | 925 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
926 | if (err < 0) |
927 | return err; | |
928 | ||
929 | /* orig and expect tuples get DIR_ORIGINAL */ | |
930 | if (type == CTA_TUPLE_REPLY) | |
931 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
932 | else | |
933 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
934 | ||
c1d10adb PNA |
935 | return 0; |
936 | } | |
937 | ||
ef00f89f PM |
938 | static int |
939 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) | |
940 | { | |
941 | if (attr) | |
942 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
943 | *zone = ntohs(nla_get_be16(attr)); | |
944 | #else | |
945 | return -EOPNOTSUPP; | |
946 | #endif | |
947 | else | |
948 | *zone = 0; | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
d0b0268f | 953 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
6d1fafca FW |
954 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
955 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
d0b0268f PM |
956 | }; |
957 | ||
c1d10adb | 958 | static inline int |
ae243bee PNA |
959 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
960 | struct nlattr **helpinfo) | |
c1d10adb | 961 | { |
130ffbc2 | 962 | int err; |
df6fb868 | 963 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 964 | |
130ffbc2 DB |
965 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
966 | if (err < 0) | |
967 | return err; | |
c1d10adb | 968 | |
df6fb868 | 969 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
970 | return -EINVAL; |
971 | ||
df6fb868 | 972 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb | 973 | |
ae243bee PNA |
974 | if (tb[CTA_HELP_INFO]) |
975 | *helpinfo = tb[CTA_HELP_INFO]; | |
976 | ||
c1d10adb PNA |
977 | return 0; |
978 | } | |
979 | ||
f73e924c | 980 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
981 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
982 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 983 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
984 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
985 | [CTA_HELP] = { .type = NLA_NESTED }, | |
986 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
987 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
988 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 989 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
990 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
991 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
6d1fafca FW |
992 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
993 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, | |
ef00f89f | 994 | [CTA_ZONE] = { .type = NLA_U16 }, |
0f298a28 | 995 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
9b21f6a9 | 996 | [CTA_LABELS] = { .type = NLA_BINARY, |
d2bf2f34 | 997 | .len = NF_CT_LABELS_MAX_SIZE }, |
9b21f6a9 | 998 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, |
d2bf2f34 | 999 | .len = NF_CT_LABELS_MAX_SIZE }, |
c1d10adb PNA |
1000 | }; |
1001 | ||
1002 | static int | |
601e68e1 | 1003 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1004 | const struct nlmsghdr *nlh, |
1005 | const struct nlattr * const cda[]) | |
c1d10adb | 1006 | { |
9592a5c0 | 1007 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1008 | struct nf_conntrack_tuple_hash *h; |
1009 | struct nf_conntrack_tuple tuple; | |
1010 | struct nf_conn *ct; | |
96bcf938 | 1011 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1012 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1013 | u16 zone; |
1014 | int err; | |
1015 | ||
1016 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1017 | if (err < 0) | |
1018 | return err; | |
c1d10adb | 1019 | |
df6fb868 | 1020 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 1021 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 1022 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
1023 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
1024 | else { | |
1025 | /* Flush the whole table */ | |
9592a5c0 | 1026 | nf_conntrack_flush_report(net, |
15e47304 | 1027 | NETLINK_CB(skb).portid, |
274d383b | 1028 | nlmsg_report(nlh)); |
c1d10adb PNA |
1029 | return 0; |
1030 | } | |
1031 | ||
1032 | if (err < 0) | |
1033 | return err; | |
1034 | ||
ef00f89f | 1035 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 1036 | if (!h) |
c1d10adb | 1037 | return -ENOENT; |
c1d10adb PNA |
1038 | |
1039 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 1040 | |
df6fb868 | 1041 | if (cda[CTA_ID]) { |
77236b6e | 1042 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 1043 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
1044 | nf_ct_put(ct); |
1045 | return -ENOENT; | |
1046 | } | |
601e68e1 | 1047 | } |
c1d10adb | 1048 | |
02982c27 FW |
1049 | if (del_timer(&ct->timeout)) |
1050 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); | |
1051 | ||
c1d10adb | 1052 | nf_ct_put(ct); |
c1d10adb PNA |
1053 | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static int | |
601e68e1 | 1058 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1059 | const struct nlmsghdr *nlh, |
1060 | const struct nlattr * const cda[]) | |
c1d10adb | 1061 | { |
9592a5c0 | 1062 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1063 | struct nf_conntrack_tuple_hash *h; |
1064 | struct nf_conntrack_tuple tuple; | |
1065 | struct nf_conn *ct; | |
1066 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 1067 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1068 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1069 | u16 zone; |
1070 | int err; | |
c1d10adb | 1071 | |
80d326fa PNA |
1072 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
1073 | struct netlink_dump_control c = { | |
1074 | .dump = ctnetlink_dump_table, | |
1075 | .done = ctnetlink_done, | |
1076 | }; | |
0f298a28 PNA |
1077 | #ifdef CONFIG_NF_CONNTRACK_MARK |
1078 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { | |
1079 | struct ctnetlink_dump_filter *filter; | |
1080 | ||
1081 | filter = kzalloc(sizeof(struct ctnetlink_dump_filter), | |
1082 | GFP_ATOMIC); | |
1083 | if (filter == NULL) | |
1084 | return -ENOMEM; | |
1085 | ||
1086 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); | |
1087 | filter->mark.mask = | |
1088 | ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
1089 | c.data = filter; | |
1090 | } | |
1091 | #endif | |
80d326fa PNA |
1092 | return netlink_dump_start(ctnl, skb, nlh, &c); |
1093 | } | |
c1d10adb | 1094 | |
ef00f89f PM |
1095 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
1096 | if (err < 0) | |
1097 | return err; | |
1098 | ||
df6fb868 | 1099 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 1100 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 1101 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
1102 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
1103 | else | |
1104 | return -EINVAL; | |
1105 | ||
1106 | if (err < 0) | |
1107 | return err; | |
1108 | ||
ef00f89f | 1109 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 1110 | if (!h) |
c1d10adb | 1111 | return -ENOENT; |
9ea8cfd6 | 1112 | |
c1d10adb PNA |
1113 | ct = nf_ct_tuplehash_to_ctrack(h); |
1114 | ||
1115 | err = -ENOMEM; | |
96bcf938 PNA |
1116 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1117 | if (skb2 == NULL) { | |
c1d10adb PNA |
1118 | nf_ct_put(ct); |
1119 | return -ENOMEM; | |
1120 | } | |
c1d10adb | 1121 | |
528a3a6f | 1122 | rcu_read_lock(); |
15e47304 | 1123 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, |
80e60e67 | 1124 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
528a3a6f | 1125 | rcu_read_unlock(); |
c1d10adb PNA |
1126 | nf_ct_put(ct); |
1127 | if (err <= 0) | |
1128 | goto free; | |
1129 | ||
15e47304 | 1130 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
c1d10adb PNA |
1131 | if (err < 0) |
1132 | goto out; | |
1133 | ||
c1d10adb PNA |
1134 | return 0; |
1135 | ||
1136 | free: | |
1137 | kfree_skb(skb2); | |
1138 | out: | |
f31e8d49 PNA |
1139 | /* this avoids a loop in nfnetlink. */ |
1140 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
1141 | } |
1142 | ||
d871befe PNA |
1143 | static int ctnetlink_done_list(struct netlink_callback *cb) |
1144 | { | |
1145 | if (cb->args[1]) | |
1146 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | static int | |
b7779d06 | 1151 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying) |
d871befe | 1152 | { |
b7779d06 | 1153 | struct nf_conn *ct, *last = NULL; |
d871befe PNA |
1154 | struct nf_conntrack_tuple_hash *h; |
1155 | struct hlist_nulls_node *n; | |
1156 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
1157 | u_int8_t l3proto = nfmsg->nfgen_family; | |
1158 | int res; | |
b7779d06 JDB |
1159 | int cpu; |
1160 | struct hlist_nulls_head *list; | |
1161 | struct net *net = sock_net(skb->sk); | |
d871befe PNA |
1162 | |
1163 | if (cb->args[2]) | |
1164 | return 0; | |
1165 | ||
b7779d06 JDB |
1166 | if (cb->args[0] == nr_cpu_ids) |
1167 | return 0; | |
1168 | ||
1169 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
1170 | struct ct_pcpu *pcpu; | |
1171 | ||
1172 | if (!cpu_possible(cpu)) | |
d871befe | 1173 | continue; |
b7779d06 JDB |
1174 | |
1175 | pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu); | |
1176 | spin_lock_bh(&pcpu->lock); | |
1177 | last = (struct nf_conn *)cb->args[1]; | |
1178 | list = dying ? &pcpu->dying : &pcpu->unconfirmed; | |
1179 | restart: | |
1180 | hlist_nulls_for_each_entry(h, n, list, hnnode) { | |
1181 | ct = nf_ct_tuplehash_to_ctrack(h); | |
1182 | if (l3proto && nf_ct_l3num(ct) != l3proto) | |
d871befe | 1183 | continue; |
b7779d06 JDB |
1184 | if (cb->args[1]) { |
1185 | if (ct != last) | |
1186 | continue; | |
1187 | cb->args[1] = 0; | |
1188 | } | |
1189 | rcu_read_lock(); | |
1190 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
1191 | cb->nlh->nlmsg_seq, | |
1192 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
1193 | ct); | |
1194 | rcu_read_unlock(); | |
1195 | if (res < 0) { | |
1196 | nf_conntrack_get(&ct->ct_general); | |
1197 | cb->args[1] = (unsigned long)ct; | |
1198 | spin_unlock_bh(&pcpu->lock); | |
1199 | goto out; | |
1200 | } | |
d871befe | 1201 | } |
b7779d06 JDB |
1202 | if (cb->args[1]) { |
1203 | cb->args[1] = 0; | |
1204 | goto restart; | |
1205 | } else | |
1206 | cb->args[2] = 1; | |
1207 | spin_unlock_bh(&pcpu->lock); | |
d871befe | 1208 | } |
d871befe | 1209 | out: |
d871befe PNA |
1210 | if (last) |
1211 | nf_ct_put(last); | |
1212 | ||
1213 | return skb->len; | |
1214 | } | |
1215 | ||
1216 | static int | |
1217 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) | |
1218 | { | |
b7779d06 | 1219 | return ctnetlink_dump_list(skb, cb, true); |
d871befe PNA |
1220 | } |
1221 | ||
1222 | static int | |
1223 | ctnetlink_get_ct_dying(struct sock *ctnl, struct sk_buff *skb, | |
1224 | const struct nlmsghdr *nlh, | |
1225 | const struct nlattr * const cda[]) | |
1226 | { | |
1227 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1228 | struct netlink_dump_control c = { | |
1229 | .dump = ctnetlink_dump_dying, | |
1230 | .done = ctnetlink_done_list, | |
1231 | }; | |
1232 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1233 | } | |
1234 | ||
1235 | return -EOPNOTSUPP; | |
1236 | } | |
1237 | ||
1238 | static int | |
1239 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) | |
1240 | { | |
b7779d06 | 1241 | return ctnetlink_dump_list(skb, cb, false); |
d871befe PNA |
1242 | } |
1243 | ||
1244 | static int | |
1245 | ctnetlink_get_ct_unconfirmed(struct sock *ctnl, struct sk_buff *skb, | |
1246 | const struct nlmsghdr *nlh, | |
1247 | const struct nlattr * const cda[]) | |
1248 | { | |
1249 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1250 | struct netlink_dump_control c = { | |
1251 | .dump = ctnetlink_dump_unconfirmed, | |
1252 | .done = ctnetlink_done_list, | |
1253 | }; | |
1254 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1255 | } | |
1256 | ||
1257 | return -EOPNOTSUPP; | |
1258 | } | |
1259 | ||
67671841 | 1260 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
1261 | static int |
1262 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
1263 | enum nf_nat_manip_type manip, | |
39938324 | 1264 | const struct nlattr *attr) |
e6a7d3c0 PNA |
1265 | { |
1266 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
c7232c99 | 1267 | int err; |
e6a7d3c0 PNA |
1268 | |
1269 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
1270 | if (!parse_nat_setup) { | |
95a5afca | 1271 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 1272 | rcu_read_unlock(); |
c14b78e7 | 1273 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1274 | if (request_module("nf-nat") < 0) { |
c14b78e7 | 1275 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1276 | rcu_read_lock(); |
1277 | return -EOPNOTSUPP; | |
1278 | } | |
c14b78e7 | 1279 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1280 | rcu_read_lock(); |
1281 | if (nfnetlink_parse_nat_setup_hook) | |
1282 | return -EAGAIN; | |
1283 | #endif | |
1284 | return -EOPNOTSUPP; | |
1285 | } | |
1286 | ||
c7232c99 PM |
1287 | err = parse_nat_setup(ct, manip, attr); |
1288 | if (err == -EAGAIN) { | |
1289 | #ifdef CONFIG_MODULES | |
1290 | rcu_read_unlock(); | |
c14b78e7 | 1291 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1292 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
c14b78e7 | 1293 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1294 | rcu_read_lock(); |
1295 | return -EOPNOTSUPP; | |
1296 | } | |
c14b78e7 | 1297 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1298 | rcu_read_lock(); |
1299 | #else | |
1300 | err = -EOPNOTSUPP; | |
1301 | #endif | |
1302 | } | |
1303 | return err; | |
e6a7d3c0 | 1304 | } |
67671841 | 1305 | #endif |
e6a7d3c0 | 1306 | |
bb5cf80e | 1307 | static int |
39938324 | 1308 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1309 | { |
1310 | unsigned long d; | |
77236b6e | 1311 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
1312 | d = ct->status ^ status; |
1313 | ||
1314 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
1315 | /* unchangeable */ | |
0adf9d67 | 1316 | return -EBUSY; |
601e68e1 | 1317 | |
c1d10adb PNA |
1318 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
1319 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 1320 | return -EBUSY; |
601e68e1 | 1321 | |
c1d10adb PNA |
1322 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
1323 | /* ASSURED bit can only be set */ | |
0adf9d67 | 1324 | return -EBUSY; |
c1d10adb | 1325 | |
c1d10adb PNA |
1326 | /* Be careful here, modifying NAT bits can screw up things, |
1327 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 1328 | * nf_nat_range. */ |
c1d10adb PNA |
1329 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
1330 | return 0; | |
1331 | } | |
1332 | ||
e6a7d3c0 | 1333 | static int |
0eba801b | 1334 | ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1335 | { |
1336 | #ifdef CONFIG_NF_NAT_NEEDED | |
1337 | int ret; | |
1338 | ||
0eba801b PNA |
1339 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST, |
1340 | cda[CTA_NAT_DST]); | |
1341 | if (ret < 0) | |
1342 | return ret; | |
1343 | ||
1344 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC, | |
1345 | cda[CTA_NAT_SRC]); | |
1346 | return ret; | |
e6a7d3c0 | 1347 | #else |
0eba801b PNA |
1348 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
1349 | return 0; | |
e6a7d3c0 PNA |
1350 | return -EOPNOTSUPP; |
1351 | #endif | |
1352 | } | |
c1d10adb PNA |
1353 | |
1354 | static inline int | |
39938324 | 1355 | ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1356 | { |
1357 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1358 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1359 | char *helpname = NULL; |
ae243bee | 1360 | struct nlattr *helpinfo = NULL; |
c1d10adb PNA |
1361 | int err; |
1362 | ||
c1d10adb PNA |
1363 | /* don't change helper of sibling connections */ |
1364 | if (ct->master) | |
0adf9d67 | 1365 | return -EBUSY; |
c1d10adb | 1366 | |
ae243bee | 1367 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
c1d10adb PNA |
1368 | if (err < 0) |
1369 | return err; | |
1370 | ||
df293bbb YK |
1371 | if (!strcmp(helpname, "")) { |
1372 | if (help && help->helper) { | |
c1d10adb PNA |
1373 | /* we had a helper before ... */ |
1374 | nf_ct_remove_expectations(ct); | |
a9b3cd7f | 1375 | RCU_INIT_POINTER(help->helper, NULL); |
c1d10adb | 1376 | } |
df293bbb YK |
1377 | |
1378 | return 0; | |
c1d10adb | 1379 | } |
601e68e1 | 1380 | |
794e6871 PM |
1381 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1382 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1383 | if (helper == NULL) { |
1384 | #ifdef CONFIG_MODULES | |
ca7433df | 1385 | spin_unlock_bh(&nf_conntrack_expect_lock); |
226c0c0e PNA |
1386 | |
1387 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
ca7433df | 1388 | spin_lock_bh(&nf_conntrack_expect_lock); |
226c0c0e PNA |
1389 | return -EOPNOTSUPP; |
1390 | } | |
1391 | ||
ca7433df | 1392 | spin_lock_bh(&nf_conntrack_expect_lock); |
794e6871 PM |
1393 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1394 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1395 | if (helper) |
1396 | return -EAGAIN; | |
1397 | #endif | |
0adf9d67 | 1398 | return -EOPNOTSUPP; |
226c0c0e | 1399 | } |
df293bbb | 1400 | |
ceceae1b | 1401 | if (help) { |
ae243bee PNA |
1402 | if (help->helper == helper) { |
1403 | /* update private helper data if allowed. */ | |
7be54ca4 | 1404 | if (helper->from_nlattr) |
ae243bee | 1405 | helper->from_nlattr(helpinfo, ct); |
ceceae1b | 1406 | return 0; |
fd7462de | 1407 | } else |
ceceae1b | 1408 | return -EBUSY; |
ceceae1b | 1409 | } |
df293bbb | 1410 | |
fd7462de PNA |
1411 | /* we cannot set a helper for an existing conntrack */ |
1412 | return -EOPNOTSUPP; | |
c1d10adb PNA |
1413 | } |
1414 | ||
1415 | static inline int | |
39938324 | 1416 | ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1417 | { |
77236b6e | 1418 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1419 | |
c1d10adb PNA |
1420 | if (!del_timer(&ct->timeout)) |
1421 | return -ETIME; | |
1422 | ||
1423 | ct->timeout.expires = jiffies + timeout * HZ; | |
1424 | add_timer(&ct->timeout); | |
1425 | ||
1426 | return 0; | |
1427 | } | |
1428 | ||
d0b0268f PM |
1429 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1430 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1431 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1432 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1433 | }; | |
1434 | ||
c1d10adb | 1435 | static inline int |
39938324 | 1436 | ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1437 | { |
39938324 PM |
1438 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
1439 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; | |
605dcad6 | 1440 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1441 | int err = 0; |
1442 | ||
130ffbc2 DB |
1443 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
1444 | if (err < 0) | |
1445 | return err; | |
c1d10adb | 1446 | |
cd91566e FW |
1447 | rcu_read_lock(); |
1448 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1449 | if (l4proto->from_nlattr) |
1450 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1451 | rcu_read_unlock(); |
c1d10adb PNA |
1452 | |
1453 | return err; | |
1454 | } | |
1455 | ||
41d73ec0 PM |
1456 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
1457 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1458 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1459 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
d0b0268f PM |
1460 | }; |
1461 | ||
13eae15a | 1462 | static inline int |
41d73ec0 | 1463 | change_seq_adj(struct nf_ct_seqadj *seq, const struct nlattr * const attr) |
13eae15a | 1464 | { |
130ffbc2 | 1465 | int err; |
41d73ec0 | 1466 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
13eae15a | 1467 | |
41d73ec0 | 1468 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy); |
130ffbc2 DB |
1469 | if (err < 0) |
1470 | return err; | |
13eae15a | 1471 | |
41d73ec0 | 1472 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
13eae15a PNA |
1473 | return -EINVAL; |
1474 | ||
41d73ec0 PM |
1475 | seq->correction_pos = |
1476 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); | |
13eae15a | 1477 | |
41d73ec0 | 1478 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
13eae15a PNA |
1479 | return -EINVAL; |
1480 | ||
41d73ec0 PM |
1481 | seq->offset_before = |
1482 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); | |
13eae15a | 1483 | |
41d73ec0 | 1484 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
13eae15a PNA |
1485 | return -EINVAL; |
1486 | ||
41d73ec0 PM |
1487 | seq->offset_after = |
1488 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); | |
13eae15a PNA |
1489 | |
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | static int | |
41d73ec0 PM |
1494 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
1495 | const struct nlattr * const cda[]) | |
13eae15a | 1496 | { |
41d73ec0 | 1497 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
13eae15a | 1498 | int ret = 0; |
13eae15a | 1499 | |
41d73ec0 | 1500 | if (!seqadj) |
13eae15a PNA |
1501 | return 0; |
1502 | ||
41d73ec0 PM |
1503 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
1504 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], | |
1505 | cda[CTA_SEQ_ADJ_ORIG]); | |
13eae15a PNA |
1506 | if (ret < 0) |
1507 | return ret; | |
1508 | ||
1509 | ct->status |= IPS_SEQ_ADJUST; | |
1510 | } | |
1511 | ||
41d73ec0 PM |
1512 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
1513 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], | |
1514 | cda[CTA_SEQ_ADJ_REPLY]); | |
13eae15a PNA |
1515 | if (ret < 0) |
1516 | return ret; | |
1517 | ||
1518 | ct->status |= IPS_SEQ_ADJUST; | |
1519 | } | |
1520 | ||
1521 | return 0; | |
1522 | } | |
13eae15a | 1523 | |
9b21f6a9 FW |
1524 | static int |
1525 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) | |
1526 | { | |
1527 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
1528 | size_t len = nla_len(cda[CTA_LABELS]); | |
1529 | const void *mask = cda[CTA_LABELS_MASK]; | |
1530 | ||
1531 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ | |
1532 | return -EINVAL; | |
1533 | ||
1534 | if (mask) { | |
1535 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || | |
1536 | nla_len(cda[CTA_LABELS_MASK]) != len) | |
1537 | return -EINVAL; | |
1538 | mask = nla_data(cda[CTA_LABELS_MASK]); | |
1539 | } | |
1540 | ||
1541 | len /= sizeof(u32); | |
1542 | ||
1543 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); | |
1544 | #else | |
1545 | return -EOPNOTSUPP; | |
1546 | #endif | |
1547 | } | |
1548 | ||
c1d10adb | 1549 | static int |
39938324 PM |
1550 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1551 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1552 | { |
1553 | int err; | |
1554 | ||
e098360f PNA |
1555 | /* only allow NAT changes and master assignation for new conntracks */ |
1556 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1557 | return -EOPNOTSUPP; | |
1558 | ||
df6fb868 | 1559 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1560 | err = ctnetlink_change_helper(ct, cda); |
1561 | if (err < 0) | |
1562 | return err; | |
1563 | } | |
1564 | ||
df6fb868 | 1565 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1566 | err = ctnetlink_change_timeout(ct, cda); |
1567 | if (err < 0) | |
1568 | return err; | |
1569 | } | |
1570 | ||
df6fb868 | 1571 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1572 | err = ctnetlink_change_status(ct, cda); |
1573 | if (err < 0) | |
1574 | return err; | |
1575 | } | |
1576 | ||
df6fb868 | 1577 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1578 | err = ctnetlink_change_protoinfo(ct, cda); |
1579 | if (err < 0) | |
1580 | return err; | |
1581 | } | |
1582 | ||
bcd1e830 | 1583 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1584 | if (cda[CTA_MARK]) |
77236b6e | 1585 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1586 | #endif |
1587 | ||
41d73ec0 PM |
1588 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1589 | err = ctnetlink_change_seq_adj(ct, cda); | |
13eae15a PNA |
1590 | if (err < 0) |
1591 | return err; | |
1592 | } | |
41d73ec0 | 1593 | |
9b21f6a9 FW |
1594 | if (cda[CTA_LABELS]) { |
1595 | err = ctnetlink_attach_labels(ct, cda); | |
1596 | if (err < 0) | |
1597 | return err; | |
1598 | } | |
13eae15a | 1599 | |
c1d10adb PNA |
1600 | return 0; |
1601 | } | |
1602 | ||
f0a3c086 | 1603 | static struct nf_conn * |
ef00f89f | 1604 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
9592a5c0 | 1605 | const struct nlattr * const cda[], |
c1d10adb | 1606 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1607 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1608 | u8 u3) |
c1d10adb PNA |
1609 | { |
1610 | struct nf_conn *ct; | |
1611 | int err = -EINVAL; | |
ceceae1b | 1612 | struct nf_conntrack_helper *helper; |
315c34da | 1613 | struct nf_conn_tstamp *tstamp; |
c1d10adb | 1614 | |
ef00f89f | 1615 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1616 | if (IS_ERR(ct)) |
f0a3c086 | 1617 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1618 | |
df6fb868 | 1619 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1620 | goto err1; |
77236b6e | 1621 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1622 | |
1623 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
c1d10adb | 1624 | |
1575e7ea | 1625 | rcu_read_lock(); |
226c0c0e | 1626 | if (cda[CTA_HELP]) { |
29fe1b48 | 1627 | char *helpname = NULL; |
ae243bee PNA |
1628 | struct nlattr *helpinfo = NULL; |
1629 | ||
1630 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); | |
0f5b3e85 PM |
1631 | if (err < 0) |
1632 | goto err2; | |
226c0c0e | 1633 | |
794e6871 PM |
1634 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1635 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1636 | if (helper == NULL) { |
1637 | rcu_read_unlock(); | |
1638 | #ifdef CONFIG_MODULES | |
1639 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1640 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1641 | goto err1; |
226c0c0e PNA |
1642 | } |
1643 | ||
1644 | rcu_read_lock(); | |
794e6871 PM |
1645 | helper = __nf_conntrack_helper_find(helpname, |
1646 | nf_ct_l3num(ct), | |
1647 | nf_ct_protonum(ct)); | |
226c0c0e | 1648 | if (helper) { |
226c0c0e | 1649 | err = -EAGAIN; |
0f5b3e85 | 1650 | goto err2; |
226c0c0e PNA |
1651 | } |
1652 | rcu_read_unlock(); | |
1653 | #endif | |
1654 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1655 | goto err1; |
226c0c0e PNA |
1656 | } else { |
1657 | struct nf_conn_help *help; | |
1658 | ||
1afc5679 | 1659 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
226c0c0e | 1660 | if (help == NULL) { |
226c0c0e | 1661 | err = -ENOMEM; |
0f5b3e85 | 1662 | goto err2; |
226c0c0e | 1663 | } |
ae243bee | 1664 | /* set private helper data if allowed. */ |
7be54ca4 | 1665 | if (helper->from_nlattr) |
ae243bee | 1666 | helper->from_nlattr(helpinfo, ct); |
226c0c0e PNA |
1667 | |
1668 | /* not in hash table yet so not strictly necessary */ | |
a9b3cd7f | 1669 | RCU_INIT_POINTER(help->helper, helper); |
226c0c0e PNA |
1670 | } |
1671 | } else { | |
1672 | /* try an implicit helper assignation */ | |
b2a15a60 | 1673 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1674 | if (err < 0) |
1675 | goto err2; | |
1575e7ea PNA |
1676 | } |
1677 | ||
0eba801b PNA |
1678 | err = ctnetlink_setup_nat(ct, cda); |
1679 | if (err < 0) | |
1680 | goto err2; | |
e6a7d3c0 | 1681 | |
a88e22ad | 1682 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
a992ca2a | 1683 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
a88e22ad | 1684 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
c539f017 FW |
1685 | nf_ct_labels_ext_add(ct); |
1686 | ||
a88e22ad PNA |
1687 | /* we must add conntrack extensions before confirmation. */ |
1688 | ct->status |= IPS_CONFIRMED; | |
1689 | ||
1690 | if (cda[CTA_STATUS]) { | |
1691 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1692 | if (err < 0) |
1693 | goto err2; | |
bbb3357d | 1694 | } |
c1d10adb | 1695 | |
41d73ec0 PM |
1696 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1697 | err = ctnetlink_change_seq_adj(ct, cda); | |
0f5b3e85 PM |
1698 | if (err < 0) |
1699 | goto err2; | |
c969aa7d | 1700 | } |
c969aa7d | 1701 | |
e5fc9e7a | 1702 | memset(&ct->proto, 0, sizeof(ct->proto)); |
df6fb868 | 1703 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1704 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1705 | if (err < 0) |
1706 | goto err2; | |
c1d10adb PNA |
1707 | } |
1708 | ||
bcd1e830 | 1709 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1710 | if (cda[CTA_MARK]) |
77236b6e | 1711 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1712 | #endif |
1713 | ||
5faa1f4c | 1714 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1715 | if (cda[CTA_TUPLE_MASTER]) { |
1716 | struct nf_conntrack_tuple master; | |
1717 | struct nf_conntrack_tuple_hash *master_h; | |
1718 | struct nf_conn *master_ct; | |
1719 | ||
1720 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1721 | if (err < 0) | |
0f5b3e85 | 1722 | goto err2; |
7ec47496 | 1723 | |
ef00f89f | 1724 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
1725 | if (master_h == NULL) { |
1726 | err = -ENOENT; | |
0f5b3e85 | 1727 | goto err2; |
7ec47496 PNA |
1728 | } |
1729 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1730 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1731 | ct->master = master_ct; |
f2a89004 | 1732 | } |
315c34da PNA |
1733 | tstamp = nf_conn_tstamp_find(ct); |
1734 | if (tstamp) | |
1735 | tstamp->start = ktime_to_ns(ktime_get_real()); | |
5faa1f4c | 1736 | |
7d367e06 JK |
1737 | err = nf_conntrack_hash_check_insert(ct); |
1738 | if (err < 0) | |
1739 | goto err2; | |
1740 | ||
58a3c9bb | 1741 | rcu_read_unlock(); |
dafc741c | 1742 | |
f0a3c086 | 1743 | return ct; |
c1d10adb | 1744 | |
0f5b3e85 PM |
1745 | err2: |
1746 | rcu_read_unlock(); | |
1747 | err1: | |
c1d10adb | 1748 | nf_conntrack_free(ct); |
f0a3c086 | 1749 | return ERR_PTR(err); |
c1d10adb PNA |
1750 | } |
1751 | ||
601e68e1 YH |
1752 | static int |
1753 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1754 | const struct nlmsghdr *nlh, |
1755 | const struct nlattr * const cda[]) | |
c1d10adb | 1756 | { |
9592a5c0 | 1757 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1758 | struct nf_conntrack_tuple otuple, rtuple; |
1759 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1760 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
7d367e06 | 1761 | struct nf_conn *ct; |
c1d10adb | 1762 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1763 | u16 zone; |
1764 | int err; | |
1765 | ||
1766 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1767 | if (err < 0) | |
1768 | return err; | |
c1d10adb | 1769 | |
df6fb868 | 1770 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1771 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1772 | if (err < 0) | |
1773 | return err; | |
1774 | } | |
1775 | ||
df6fb868 | 1776 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1777 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1778 | if (err < 0) | |
1779 | return err; | |
1780 | } | |
1781 | ||
df6fb868 | 1782 | if (cda[CTA_TUPLE_ORIG]) |
7d367e06 | 1783 | h = nf_conntrack_find_get(net, zone, &otuple); |
df6fb868 | 1784 | else if (cda[CTA_TUPLE_REPLY]) |
7d367e06 | 1785 | h = nf_conntrack_find_get(net, zone, &rtuple); |
c1d10adb PNA |
1786 | |
1787 | if (h == NULL) { | |
c1d10adb | 1788 | err = -ENOENT; |
f0a3c086 | 1789 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
fecc1133 | 1790 | enum ip_conntrack_events events; |
5faa1f4c | 1791 | |
442fad94 FW |
1792 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
1793 | return -EINVAL; | |
1794 | ||
ef00f89f | 1795 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
f0a3c086 | 1796 | &rtuple, u3); |
7d367e06 JK |
1797 | if (IS_ERR(ct)) |
1798 | return PTR_ERR(ct); | |
1799 | ||
f0a3c086 | 1800 | err = 0; |
fecc1133 PNA |
1801 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1802 | events = IPCT_RELATED; | |
1803 | else | |
1804 | events = IPCT_NEW; | |
1805 | ||
9b21f6a9 FW |
1806 | if (cda[CTA_LABELS] && |
1807 | ctnetlink_attach_labels(ct, cda) == 0) | |
1808 | events |= (1 << IPCT_LABEL); | |
1809 | ||
858b3133 PM |
1810 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1811 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1812 | (1 << IPCT_HELPER) | |
1813 | (1 << IPCT_PROTOINFO) | | |
41d73ec0 | 1814 | (1 << IPCT_SEQADJ) | |
a0891aa6 | 1815 | (1 << IPCT_MARK) | events, |
15e47304 | 1816 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 1817 | nlmsg_report(nlh)); |
f0a3c086 | 1818 | nf_ct_put(ct); |
7d367e06 | 1819 | } |
5faa1f4c | 1820 | |
c1d10adb PNA |
1821 | return err; |
1822 | } | |
1823 | /* implicit 'else' */ | |
1824 | ||
c1d10adb | 1825 | err = -EEXIST; |
7d367e06 | 1826 | ct = nf_ct_tuplehash_to_ctrack(h); |
ff4ca827 | 1827 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
ca7433df | 1828 | spin_lock_bh(&nf_conntrack_expect_lock); |
19abb7b0 | 1829 | err = ctnetlink_change_conntrack(ct, cda); |
ca7433df | 1830 | spin_unlock_bh(&nf_conntrack_expect_lock); |
19abb7b0 | 1831 | if (err == 0) { |
858b3133 PM |
1832 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1833 | (1 << IPCT_ASSURED) | | |
a0891aa6 | 1834 | (1 << IPCT_HELPER) | |
797a7d66 | 1835 | (1 << IPCT_LABEL) | |
a0891aa6 | 1836 | (1 << IPCT_PROTOINFO) | |
41d73ec0 | 1837 | (1 << IPCT_SEQADJ) | |
a0891aa6 | 1838 | (1 << IPCT_MARK), |
15e47304 | 1839 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 1840 | nlmsg_report(nlh)); |
7d367e06 | 1841 | } |
ff4ca827 | 1842 | } |
c1d10adb | 1843 | |
7d367e06 | 1844 | nf_ct_put(ct); |
c1d10adb PNA |
1845 | return err; |
1846 | } | |
1847 | ||
392025f8 | 1848 | static int |
15e47304 | 1849 | ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
392025f8 PNA |
1850 | __u16 cpu, const struct ip_conntrack_stat *st) |
1851 | { | |
1852 | struct nlmsghdr *nlh; | |
1853 | struct nfgenmsg *nfmsg; | |
15e47304 | 1854 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
1855 | |
1856 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU); | |
15e47304 | 1857 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
1858 | if (nlh == NULL) |
1859 | goto nlmsg_failure; | |
1860 | ||
1861 | nfmsg = nlmsg_data(nlh); | |
1862 | nfmsg->nfgen_family = AF_UNSPEC; | |
1863 | nfmsg->version = NFNETLINK_V0; | |
1864 | nfmsg->res_id = htons(cpu); | |
1865 | ||
1866 | if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) || | |
1867 | nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || | |
1868 | nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) || | |
1869 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || | |
1870 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || | |
1871 | nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) || | |
1872 | nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) || | |
1873 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || | |
1874 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, | |
1875 | htonl(st->insert_failed)) || | |
1876 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || | |
1877 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || | |
1878 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || | |
1879 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, | |
1880 | htonl(st->search_restart))) | |
1881 | goto nla_put_failure; | |
1882 | ||
1883 | nlmsg_end(skb, nlh); | |
1884 | return skb->len; | |
1885 | ||
1886 | nla_put_failure: | |
1887 | nlmsg_failure: | |
1888 | nlmsg_cancel(skb, nlh); | |
1889 | return -1; | |
1890 | } | |
1891 | ||
1892 | static int | |
1893 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1894 | { | |
1895 | int cpu; | |
1896 | struct net *net = sock_net(skb->sk); | |
1897 | ||
1898 | if (cb->args[0] == nr_cpu_ids) | |
1899 | return 0; | |
1900 | ||
1901 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
1902 | const struct ip_conntrack_stat *st; | |
1903 | ||
1904 | if (!cpu_possible(cpu)) | |
1905 | continue; | |
1906 | ||
1907 | st = per_cpu_ptr(net->ct.stat, cpu); | |
1908 | if (ctnetlink_ct_stat_cpu_fill_info(skb, | |
15e47304 | 1909 | NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
1910 | cb->nlh->nlmsg_seq, |
1911 | cpu, st) < 0) | |
1912 | break; | |
1913 | } | |
1914 | cb->args[0] = cpu; | |
1915 | ||
1916 | return skb->len; | |
1917 | } | |
1918 | ||
1919 | static int | |
1920 | ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb, | |
1921 | const struct nlmsghdr *nlh, | |
1922 | const struct nlattr * const cda[]) | |
1923 | { | |
1924 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1925 | struct netlink_dump_control c = { | |
1926 | .dump = ctnetlink_ct_stat_cpu_dump, | |
1927 | }; | |
1928 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1929 | } | |
1930 | ||
1931 | return 0; | |
1932 | } | |
1933 | ||
1934 | static int | |
15e47304 | 1935 | ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
392025f8 PNA |
1936 | struct net *net) |
1937 | { | |
1938 | struct nlmsghdr *nlh; | |
1939 | struct nfgenmsg *nfmsg; | |
15e47304 | 1940 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
1941 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
1942 | ||
1943 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS); | |
15e47304 | 1944 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
1945 | if (nlh == NULL) |
1946 | goto nlmsg_failure; | |
1947 | ||
1948 | nfmsg = nlmsg_data(nlh); | |
1949 | nfmsg->nfgen_family = AF_UNSPEC; | |
1950 | nfmsg->version = NFNETLINK_V0; | |
1951 | nfmsg->res_id = 0; | |
1952 | ||
1953 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) | |
1954 | goto nla_put_failure; | |
1955 | ||
1956 | nlmsg_end(skb, nlh); | |
1957 | return skb->len; | |
1958 | ||
1959 | nla_put_failure: | |
1960 | nlmsg_failure: | |
1961 | nlmsg_cancel(skb, nlh); | |
1962 | return -1; | |
1963 | } | |
1964 | ||
1965 | static int | |
1966 | ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb, | |
1967 | const struct nlmsghdr *nlh, | |
1968 | const struct nlattr * const cda[]) | |
1969 | { | |
1970 | struct sk_buff *skb2; | |
1971 | int err; | |
1972 | ||
1973 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1974 | if (skb2 == NULL) | |
1975 | return -ENOMEM; | |
1976 | ||
15e47304 | 1977 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
392025f8 PNA |
1978 | nlh->nlmsg_seq, |
1979 | NFNL_MSG_TYPE(nlh->nlmsg_type), | |
1980 | sock_net(skb->sk)); | |
1981 | if (err <= 0) | |
1982 | goto free; | |
1983 | ||
15e47304 | 1984 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
392025f8 PNA |
1985 | if (err < 0) |
1986 | goto out; | |
1987 | ||
1988 | return 0; | |
1989 | ||
1990 | free: | |
1991 | kfree_skb(skb2); | |
1992 | out: | |
1993 | /* this avoids a loop in nfnetlink. */ | |
1994 | return err == -EAGAIN ? -ENOBUFS : err; | |
1995 | } | |
1996 | ||
bd077937 PNA |
1997 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1998 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, | |
1999 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
2000 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
2001 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
2002 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
2003 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, | |
2004 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
2005 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, | |
2006 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, | |
2007 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, | |
2008 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, | |
2009 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, | |
2010 | }; | |
2011 | ||
2012 | static struct nf_conntrack_expect * | |
2013 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, | |
2014 | struct nf_conntrack_helper *helper, | |
2015 | struct nf_conntrack_tuple *tuple, | |
2016 | struct nf_conntrack_tuple *mask); | |
2017 | ||
7c622345 | 2018 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
9cb01766 PNA |
2019 | static size_t |
2020 | ctnetlink_nfqueue_build_size(const struct nf_conn *ct) | |
2021 | { | |
2022 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
2023 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
2024 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
2025 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
2026 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
2027 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
2028 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ | |
2029 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
2030 | + nla_total_size(0) /* CTA_HELP */ | |
2031 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
2032 | + ctnetlink_secctx_size(ct) | |
2033 | #ifdef CONFIG_NF_NAT_NEEDED | |
2034 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ | |
2035 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
2036 | #endif | |
2037 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2038 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ | |
2039 | #endif | |
2040 | + ctnetlink_proto_size(ct) | |
2041 | ; | |
2042 | } | |
2043 | ||
2044 | static int | |
2045 | ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct) | |
2046 | { | |
2047 | struct nlattr *nest_parms; | |
2048 | ||
2049 | rcu_read_lock(); | |
2050 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); | |
2051 | if (!nest_parms) | |
2052 | goto nla_put_failure; | |
2053 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) | |
2054 | goto nla_put_failure; | |
2055 | nla_nest_end(skb, nest_parms); | |
2056 | ||
2057 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); | |
2058 | if (!nest_parms) | |
2059 | goto nla_put_failure; | |
2060 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) | |
2061 | goto nla_put_failure; | |
2062 | nla_nest_end(skb, nest_parms); | |
2063 | ||
2064 | if (nf_ct_zone(ct)) { | |
2065 | if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) | |
2066 | goto nla_put_failure; | |
2067 | } | |
2068 | ||
2069 | if (ctnetlink_dump_id(skb, ct) < 0) | |
2070 | goto nla_put_failure; | |
2071 | ||
2072 | if (ctnetlink_dump_status(skb, ct) < 0) | |
2073 | goto nla_put_failure; | |
2074 | ||
2075 | if (ctnetlink_dump_timeout(skb, ct) < 0) | |
2076 | goto nla_put_failure; | |
2077 | ||
2078 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) | |
2079 | goto nla_put_failure; | |
2080 | ||
2081 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) | |
2082 | goto nla_put_failure; | |
2083 | ||
2084 | #ifdef CONFIG_NF_CONNTRACK_SECMARK | |
2085 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) | |
2086 | goto nla_put_failure; | |
2087 | #endif | |
2088 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) | |
2089 | goto nla_put_failure; | |
2090 | ||
2091 | if ((ct->status & IPS_SEQ_ADJUST) && | |
41d73ec0 | 2092 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
9cb01766 PNA |
2093 | goto nla_put_failure; |
2094 | ||
2095 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2096 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) | |
2097 | goto nla_put_failure; | |
2098 | #endif | |
0ceabd83 FW |
2099 | if (ctnetlink_dump_labels(skb, ct) < 0) |
2100 | goto nla_put_failure; | |
9cb01766 PNA |
2101 | rcu_read_unlock(); |
2102 | return 0; | |
2103 | ||
2104 | nla_put_failure: | |
2105 | rcu_read_unlock(); | |
2106 | return -ENOSPC; | |
2107 | } | |
2108 | ||
2109 | static int | |
2110 | ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) | |
2111 | { | |
2112 | int err; | |
2113 | ||
2114 | if (cda[CTA_TIMEOUT]) { | |
2115 | err = ctnetlink_change_timeout(ct, cda); | |
2116 | if (err < 0) | |
2117 | return err; | |
2118 | } | |
2119 | if (cda[CTA_STATUS]) { | |
2120 | err = ctnetlink_change_status(ct, cda); | |
2121 | if (err < 0) | |
2122 | return err; | |
2123 | } | |
2124 | if (cda[CTA_HELP]) { | |
2125 | err = ctnetlink_change_helper(ct, cda); | |
2126 | if (err < 0) | |
2127 | return err; | |
2128 | } | |
9b21f6a9 FW |
2129 | if (cda[CTA_LABELS]) { |
2130 | err = ctnetlink_attach_labels(ct, cda); | |
2131 | if (err < 0) | |
2132 | return err; | |
2133 | } | |
9cb01766 | 2134 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
534473c6 FW |
2135 | if (cda[CTA_MARK]) { |
2136 | u32 mask = 0, mark, newmark; | |
2137 | if (cda[CTA_MARK_MASK]) | |
2138 | mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
2139 | ||
2140 | mark = ntohl(nla_get_be32(cda[CTA_MARK])); | |
2141 | newmark = (ct->mark & mask) ^ mark; | |
2142 | if (newmark != ct->mark) | |
2143 | ct->mark = newmark; | |
2144 | } | |
9cb01766 PNA |
2145 | #endif |
2146 | return 0; | |
2147 | } | |
2148 | ||
2149 | static int | |
2150 | ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct) | |
2151 | { | |
2152 | struct nlattr *cda[CTA_MAX+1]; | |
68e035c9 | 2153 | int ret; |
9cb01766 | 2154 | |
130ffbc2 DB |
2155 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); |
2156 | if (ret < 0) | |
2157 | return ret; | |
9cb01766 | 2158 | |
ca7433df | 2159 | spin_lock_bh(&nf_conntrack_expect_lock); |
68e035c9 | 2160 | ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct); |
ca7433df | 2161 | spin_unlock_bh(&nf_conntrack_expect_lock); |
68e035c9 PNA |
2162 | |
2163 | return ret; | |
9cb01766 PNA |
2164 | } |
2165 | ||
bd077937 PNA |
2166 | static int ctnetlink_nfqueue_exp_parse(const struct nlattr * const *cda, |
2167 | const struct nf_conn *ct, | |
2168 | struct nf_conntrack_tuple *tuple, | |
2169 | struct nf_conntrack_tuple *mask) | |
2170 | { | |
2171 | int err; | |
2172 | ||
2173 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, | |
2174 | nf_ct_l3num(ct)); | |
2175 | if (err < 0) | |
2176 | return err; | |
2177 | ||
2178 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, | |
2179 | nf_ct_l3num(ct)); | |
2180 | } | |
2181 | ||
2182 | static int | |
2183 | ctnetlink_nfqueue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, | |
2184 | u32 portid, u32 report) | |
2185 | { | |
2186 | struct nlattr *cda[CTA_EXPECT_MAX+1]; | |
2187 | struct nf_conntrack_tuple tuple, mask; | |
b7e092c0 | 2188 | struct nf_conntrack_helper *helper = NULL; |
bd077937 PNA |
2189 | struct nf_conntrack_expect *exp; |
2190 | int err; | |
2191 | ||
2192 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy); | |
2193 | if (err < 0) | |
2194 | return err; | |
2195 | ||
2196 | err = ctnetlink_nfqueue_exp_parse((const struct nlattr * const *)cda, | |
2197 | ct, &tuple, &mask); | |
2198 | if (err < 0) | |
2199 | return err; | |
2200 | ||
2201 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
2202 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
2203 | ||
2204 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), | |
2205 | nf_ct_protonum(ct)); | |
2206 | if (helper == NULL) | |
2207 | return -EOPNOTSUPP; | |
2208 | } | |
2209 | ||
2210 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, | |
2211 | helper, &tuple, &mask); | |
2212 | if (IS_ERR(exp)) | |
2213 | return PTR_ERR(exp); | |
2214 | ||
2215 | err = nf_ct_expect_related_report(exp, portid, report); | |
2216 | if (err < 0) { | |
2217 | nf_ct_expect_put(exp); | |
2218 | return err; | |
2219 | } | |
2220 | ||
2221 | return 0; | |
2222 | } | |
2223 | ||
9cb01766 PNA |
2224 | static struct nfq_ct_hook ctnetlink_nfqueue_hook = { |
2225 | .build_size = ctnetlink_nfqueue_build_size, | |
2226 | .build = ctnetlink_nfqueue_build, | |
2227 | .parse = ctnetlink_nfqueue_parse, | |
bd077937 | 2228 | .attach_expect = ctnetlink_nfqueue_attach_expect, |
41d73ec0 | 2229 | .seq_adjust = nf_ct_tcp_seqadj_set, |
9cb01766 | 2230 | }; |
7c622345 | 2231 | #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */ |
9cb01766 | 2232 | |
601e68e1 YH |
2233 | /*********************************************************************** |
2234 | * EXPECT | |
2235 | ***********************************************************************/ | |
c1d10adb PNA |
2236 | |
2237 | static inline int | |
2238 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
2239 | const struct nf_conntrack_tuple *tuple, | |
2240 | enum ctattr_expect type) | |
2241 | { | |
df6fb868 | 2242 | struct nlattr *nest_parms; |
601e68e1 | 2243 | |
df6fb868 PM |
2244 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
2245 | if (!nest_parms) | |
2246 | goto nla_put_failure; | |
c1d10adb | 2247 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
2248 | goto nla_put_failure; |
2249 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
2250 | |
2251 | return 0; | |
2252 | ||
df6fb868 | 2253 | nla_put_failure: |
c1d10adb | 2254 | return -1; |
601e68e1 | 2255 | } |
c1d10adb | 2256 | |
1cde6436 PNA |
2257 | static inline int |
2258 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
2259 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 2260 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
2261 | { |
2262 | int ret; | |
2263 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 2264 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 2265 | struct nf_conntrack_tuple m; |
df6fb868 | 2266 | struct nlattr *nest_parms; |
d4156e8c PM |
2267 | |
2268 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 2269 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
2270 | m.src.u.all = mask->src.u.all; |
2271 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 2272 | |
df6fb868 PM |
2273 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
2274 | if (!nest_parms) | |
2275 | goto nla_put_failure; | |
1cde6436 | 2276 | |
3b988ece | 2277 | rcu_read_lock(); |
528a3a6f | 2278 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 2279 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
3b988ece HS |
2280 | if (ret >= 0) { |
2281 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
2282 | tuple->dst.protonum); | |
d4156e8c | 2283 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
3b988ece HS |
2284 | } |
2285 | rcu_read_unlock(); | |
2286 | ||
1cde6436 | 2287 | if (unlikely(ret < 0)) |
df6fb868 | 2288 | goto nla_put_failure; |
1cde6436 | 2289 | |
df6fb868 | 2290 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
2291 | |
2292 | return 0; | |
2293 | ||
df6fb868 | 2294 | nla_put_failure: |
1cde6436 PNA |
2295 | return -1; |
2296 | } | |
2297 | ||
c7232c99 PM |
2298 | static const union nf_inet_addr any_addr; |
2299 | ||
bb5cf80e | 2300 | static int |
c1d10adb | 2301 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 2302 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2303 | { |
2304 | struct nf_conn *master = exp->master; | |
c1216382 | 2305 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
bc01befd | 2306 | struct nf_conn_help *help; |
076a0ca0 PNA |
2307 | #ifdef CONFIG_NF_NAT_NEEDED |
2308 | struct nlattr *nest_parms; | |
2309 | struct nf_conntrack_tuple nat_tuple = {}; | |
2310 | #endif | |
544d5c7d PNA |
2311 | struct nf_ct_helper_expectfn *expfn; |
2312 | ||
d978e5da PM |
2313 | if (timeout < 0) |
2314 | timeout = 0; | |
c1d10adb PNA |
2315 | |
2316 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 2317 | goto nla_put_failure; |
1cde6436 | 2318 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 2319 | goto nla_put_failure; |
c1d10adb PNA |
2320 | if (ctnetlink_exp_dump_tuple(skb, |
2321 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
2322 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 2323 | goto nla_put_failure; |
601e68e1 | 2324 | |
076a0ca0 | 2325 | #ifdef CONFIG_NF_NAT_NEEDED |
c7232c99 PM |
2326 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
2327 | exp->saved_proto.all) { | |
076a0ca0 PNA |
2328 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
2329 | if (!nest_parms) | |
2330 | goto nla_put_failure; | |
2331 | ||
cc1eb431 DM |
2332 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
2333 | goto nla_put_failure; | |
076a0ca0 PNA |
2334 | |
2335 | nat_tuple.src.l3num = nf_ct_l3num(master); | |
c7232c99 | 2336 | nat_tuple.src.u3 = exp->saved_addr; |
076a0ca0 PNA |
2337 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
2338 | nat_tuple.src.u = exp->saved_proto; | |
2339 | ||
2340 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, | |
2341 | CTA_EXPECT_NAT_TUPLE) < 0) | |
2342 | goto nla_put_failure; | |
2343 | nla_nest_end(skb, nest_parms); | |
2344 | } | |
2345 | #endif | |
cc1eb431 DM |
2346 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
2347 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || | |
2348 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || | |
2349 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) | |
2350 | goto nla_put_failure; | |
bc01befd PNA |
2351 | help = nfct_help(master); |
2352 | if (help) { | |
2353 | struct nf_conntrack_helper *helper; | |
2354 | ||
2355 | helper = rcu_dereference(help->helper); | |
cc1eb431 DM |
2356 | if (helper && |
2357 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) | |
2358 | goto nla_put_failure; | |
bc01befd | 2359 | } |
544d5c7d | 2360 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
cc1eb431 DM |
2361 | if (expfn != NULL && |
2362 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) | |
2363 | goto nla_put_failure; | |
c1d10adb PNA |
2364 | |
2365 | return 0; | |
601e68e1 | 2366 | |
df6fb868 | 2367 | nla_put_failure: |
c1d10adb PNA |
2368 | return -1; |
2369 | } | |
2370 | ||
2371 | static int | |
15e47304 | 2372 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
8b0a231d | 2373 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2374 | { |
2375 | struct nlmsghdr *nlh; | |
2376 | struct nfgenmsg *nfmsg; | |
15e47304 | 2377 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
2378 | |
2379 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
15e47304 | 2380 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2381 | if (nlh == NULL) |
2382 | goto nlmsg_failure; | |
c1d10adb | 2383 | |
96bcf938 | 2384 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2385 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2386 | nfmsg->version = NFNETLINK_V0; | |
2387 | nfmsg->res_id = 0; | |
2388 | ||
2389 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 2390 | goto nla_put_failure; |
c1d10adb | 2391 | |
96bcf938 | 2392 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
2393 | return skb->len; |
2394 | ||
2395 | nlmsg_failure: | |
df6fb868 | 2396 | nla_put_failure: |
96bcf938 | 2397 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
2398 | return -1; |
2399 | } | |
2400 | ||
2401 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
2402 | static int |
2403 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 2404 | { |
9592a5c0 AD |
2405 | struct nf_conntrack_expect *exp = item->exp; |
2406 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
2407 | struct nlmsghdr *nlh; |
2408 | struct nfgenmsg *nfmsg; | |
c1d10adb | 2409 | struct sk_buff *skb; |
ebbf41df | 2410 | unsigned int type, group; |
c1d10adb PNA |
2411 | int flags = 0; |
2412 | ||
ebbf41df PNA |
2413 | if (events & (1 << IPEXP_DESTROY)) { |
2414 | type = IPCTNL_MSG_EXP_DELETE; | |
2415 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; | |
2416 | } else if (events & (1 << IPEXP_NEW)) { | |
c1d10adb PNA |
2417 | type = IPCTNL_MSG_EXP_NEW; |
2418 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
ebbf41df | 2419 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
c1d10adb | 2420 | } else |
e34d5c1a | 2421 | return 0; |
c1d10adb | 2422 | |
ebbf41df | 2423 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
e34d5c1a | 2424 | return 0; |
b3a27bfb | 2425 | |
96bcf938 PNA |
2426 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
2427 | if (skb == NULL) | |
150ace0d | 2428 | goto errout; |
c1d10adb | 2429 | |
b633ad5f | 2430 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
15e47304 | 2431 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2432 | if (nlh == NULL) |
2433 | goto nlmsg_failure; | |
c1d10adb | 2434 | |
96bcf938 | 2435 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2436 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2437 | nfmsg->version = NFNETLINK_V0; | |
2438 | nfmsg->res_id = 0; | |
2439 | ||
528a3a6f | 2440 | rcu_read_lock(); |
c1d10adb | 2441 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 2442 | goto nla_put_failure; |
528a3a6f | 2443 | rcu_read_unlock(); |
c1d10adb | 2444 | |
96bcf938 | 2445 | nlmsg_end(skb, nlh); |
15e47304 | 2446 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
e34d5c1a | 2447 | return 0; |
c1d10adb | 2448 | |
df6fb868 | 2449 | nla_put_failure: |
528a3a6f | 2450 | rcu_read_unlock(); |
96bcf938 | 2451 | nlmsg_cancel(skb, nlh); |
528a3a6f | 2452 | nlmsg_failure: |
c1d10adb | 2453 | kfree_skb(skb); |
150ace0d | 2454 | errout: |
9592a5c0 | 2455 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 2456 | return 0; |
c1d10adb PNA |
2457 | } |
2458 | #endif | |
cf6994c2 PM |
2459 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
2460 | { | |
31f15875 PM |
2461 | if (cb->args[1]) |
2462 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
2463 | return 0; |
2464 | } | |
c1d10adb PNA |
2465 | |
2466 | static int | |
2467 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2468 | { | |
9592a5c0 | 2469 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 2470 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 2471 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 2472 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 2473 | |
7d0742da | 2474 | rcu_read_lock(); |
31f15875 PM |
2475 | last = (struct nf_conntrack_expect *)cb->args[1]; |
2476 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 2477 | restart: |
b67bfe0d | 2478 | hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
2479 | hnode) { |
2480 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 2481 | continue; |
31f15875 PM |
2482 | if (cb->args[1]) { |
2483 | if (exp != last) | |
2484 | continue; | |
2485 | cb->args[1] = 0; | |
2486 | } | |
8b0a231d | 2487 | if (ctnetlink_exp_fill_info(skb, |
15e47304 | 2488 | NETLINK_CB(cb->skb).portid, |
31f15875 PM |
2489 | cb->nlh->nlmsg_seq, |
2490 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 2491 | exp) < 0) { |
7d0742da PM |
2492 | if (!atomic_inc_not_zero(&exp->use)) |
2493 | continue; | |
31f15875 PM |
2494 | cb->args[1] = (unsigned long)exp; |
2495 | goto out; | |
2496 | } | |
cf6994c2 | 2497 | } |
31f15875 PM |
2498 | if (cb->args[1]) { |
2499 | cb->args[1] = 0; | |
2500 | goto restart; | |
cf6994c2 PM |
2501 | } |
2502 | } | |
601e68e1 | 2503 | out: |
7d0742da | 2504 | rcu_read_unlock(); |
cf6994c2 PM |
2505 | if (last) |
2506 | nf_ct_expect_put(last); | |
c1d10adb | 2507 | |
c1d10adb PNA |
2508 | return skb->len; |
2509 | } | |
2510 | ||
e844a928 PNA |
2511 | static int |
2512 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2513 | { | |
2514 | struct nf_conntrack_expect *exp, *last; | |
2515 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
2516 | struct nf_conn *ct = cb->data; | |
2517 | struct nf_conn_help *help = nfct_help(ct); | |
2518 | u_int8_t l3proto = nfmsg->nfgen_family; | |
2519 | ||
2520 | if (cb->args[0]) | |
2521 | return 0; | |
2522 | ||
2523 | rcu_read_lock(); | |
2524 | last = (struct nf_conntrack_expect *)cb->args[1]; | |
2525 | restart: | |
2526 | hlist_for_each_entry(exp, &help->expectations, lnode) { | |
2527 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
2528 | continue; | |
2529 | if (cb->args[1]) { | |
2530 | if (exp != last) | |
2531 | continue; | |
2532 | cb->args[1] = 0; | |
2533 | } | |
2534 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
2535 | cb->nlh->nlmsg_seq, | |
2536 | IPCTNL_MSG_EXP_NEW, | |
2537 | exp) < 0) { | |
2538 | if (!atomic_inc_not_zero(&exp->use)) | |
2539 | continue; | |
2540 | cb->args[1] = (unsigned long)exp; | |
2541 | goto out; | |
2542 | } | |
2543 | } | |
2544 | if (cb->args[1]) { | |
2545 | cb->args[1] = 0; | |
2546 | goto restart; | |
2547 | } | |
2548 | cb->args[0] = 1; | |
2549 | out: | |
2550 | rcu_read_unlock(); | |
2551 | if (last) | |
2552 | nf_ct_expect_put(last); | |
2553 | ||
2554 | return skb->len; | |
2555 | } | |
2556 | ||
2557 | static int ctnetlink_dump_exp_ct(struct sock *ctnl, struct sk_buff *skb, | |
2558 | const struct nlmsghdr *nlh, | |
2559 | const struct nlattr * const cda[]) | |
2560 | { | |
2561 | int err; | |
2562 | struct net *net = sock_net(ctnl); | |
2563 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
2564 | u_int8_t u3 = nfmsg->nfgen_family; | |
2565 | struct nf_conntrack_tuple tuple; | |
2566 | struct nf_conntrack_tuple_hash *h; | |
2567 | struct nf_conn *ct; | |
2568 | u16 zone = 0; | |
2569 | struct netlink_dump_control c = { | |
2570 | .dump = ctnetlink_exp_ct_dump_table, | |
2571 | .done = ctnetlink_exp_done, | |
2572 | }; | |
2573 | ||
2574 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); | |
2575 | if (err < 0) | |
2576 | return err; | |
2577 | ||
2578 | if (cda[CTA_EXPECT_ZONE]) { | |
2579 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); | |
2580 | if (err < 0) | |
2581 | return err; | |
2582 | } | |
2583 | ||
2584 | h = nf_conntrack_find_get(net, zone, &tuple); | |
2585 | if (!h) | |
2586 | return -ENOENT; | |
2587 | ||
2588 | ct = nf_ct_tuplehash_to_ctrack(h); | |
2589 | c.data = ct; | |
2590 | ||
2591 | err = netlink_dump_start(ctnl, skb, nlh, &c); | |
2592 | nf_ct_put(ct); | |
2593 | ||
2594 | return err; | |
2595 | } | |
2596 | ||
c1d10adb | 2597 | static int |
601e68e1 | 2598 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
2599 | const struct nlmsghdr *nlh, |
2600 | const struct nlattr * const cda[]) | |
c1d10adb | 2601 | { |
9592a5c0 | 2602 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
2603 | struct nf_conntrack_tuple tuple; |
2604 | struct nf_conntrack_expect *exp; | |
2605 | struct sk_buff *skb2; | |
96bcf938 | 2606 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2607 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
2608 | u16 zone; |
2609 | int err; | |
c1d10adb | 2610 | |
b8f3ab42 | 2611 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
e844a928 PNA |
2612 | if (cda[CTA_EXPECT_MASTER]) |
2613 | return ctnetlink_dump_exp_ct(ctnl, skb, nlh, cda); | |
2614 | else { | |
2615 | struct netlink_dump_control c = { | |
2616 | .dump = ctnetlink_exp_dump_table, | |
2617 | .done = ctnetlink_exp_done, | |
2618 | }; | |
2619 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2620 | } | |
c1d10adb PNA |
2621 | } |
2622 | ||
ef00f89f PM |
2623 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2624 | if (err < 0) | |
2625 | return err; | |
2626 | ||
35dba1d7 PNA |
2627 | if (cda[CTA_EXPECT_TUPLE]) |
2628 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
2629 | else if (cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
2630 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
2631 | else | |
2632 | return -EINVAL; | |
2633 | ||
2634 | if (err < 0) | |
2635 | return err; | |
2636 | ||
ef00f89f | 2637 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
2638 | if (!exp) |
2639 | return -ENOENT; | |
2640 | ||
df6fb868 | 2641 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 2642 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 2643 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 2644 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2645 | return -ENOENT; |
2646 | } | |
601e68e1 | 2647 | } |
c1d10adb PNA |
2648 | |
2649 | err = -ENOMEM; | |
96bcf938 | 2650 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
81378f72 PNA |
2651 | if (skb2 == NULL) { |
2652 | nf_ct_expect_put(exp); | |
c1d10adb | 2653 | goto out; |
81378f72 | 2654 | } |
4e9b8269 | 2655 | |
528a3a6f | 2656 | rcu_read_lock(); |
15e47304 | 2657 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
8b0a231d | 2658 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 2659 | rcu_read_unlock(); |
81378f72 | 2660 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2661 | if (err <= 0) |
2662 | goto free; | |
2663 | ||
15e47304 | 2664 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
81378f72 PNA |
2665 | if (err < 0) |
2666 | goto out; | |
c1d10adb | 2667 | |
81378f72 | 2668 | return 0; |
c1d10adb PNA |
2669 | |
2670 | free: | |
2671 | kfree_skb(skb2); | |
2672 | out: | |
81378f72 PNA |
2673 | /* this avoids a loop in nfnetlink. */ |
2674 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
2675 | } |
2676 | ||
2677 | static int | |
601e68e1 | 2678 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
2679 | const struct nlmsghdr *nlh, |
2680 | const struct nlattr * const cda[]) | |
c1d10adb | 2681 | { |
9592a5c0 | 2682 | struct net *net = sock_net(ctnl); |
31f15875 | 2683 | struct nf_conntrack_expect *exp; |
c1d10adb | 2684 | struct nf_conntrack_tuple tuple; |
96bcf938 | 2685 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
b67bfe0d | 2686 | struct hlist_node *next; |
c1d10adb | 2687 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 2688 | unsigned int i; |
ef00f89f | 2689 | u16 zone; |
c1d10adb PNA |
2690 | int err; |
2691 | ||
df6fb868 | 2692 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 2693 | /* delete a single expect by tuple */ |
ef00f89f PM |
2694 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2695 | if (err < 0) | |
2696 | return err; | |
2697 | ||
c1d10adb PNA |
2698 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
2699 | if (err < 0) | |
2700 | return err; | |
2701 | ||
2702 | /* bump usage count to 2 */ | |
ef00f89f | 2703 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
2704 | if (!exp) |
2705 | return -ENOENT; | |
2706 | ||
df6fb868 | 2707 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 2708 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 2709 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 2710 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2711 | return -ENOENT; |
2712 | } | |
2713 | } | |
2714 | ||
2715 | /* after list removal, usage count == 1 */ | |
ca7433df | 2716 | spin_lock_bh(&nf_conntrack_expect_lock); |
ebbf41df | 2717 | if (del_timer(&exp->timeout)) { |
15e47304 | 2718 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
ebbf41df PNA |
2719 | nlmsg_report(nlh)); |
2720 | nf_ct_expect_put(exp); | |
2721 | } | |
ca7433df | 2722 | spin_unlock_bh(&nf_conntrack_expect_lock); |
601e68e1 | 2723 | /* have to put what we 'get' above. |
c1d10adb | 2724 | * after this line usage count == 0 */ |
6823645d | 2725 | nf_ct_expect_put(exp); |
df6fb868 PM |
2726 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
2727 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 2728 | struct nf_conn_help *m_help; |
c1d10adb PNA |
2729 | |
2730 | /* delete all expectations for this helper */ | |
ca7433df | 2731 | spin_lock_bh(&nf_conntrack_expect_lock); |
31f15875 | 2732 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
b67bfe0d | 2733 | hlist_for_each_entry_safe(exp, next, |
9592a5c0 | 2734 | &net->ct.expect_hash[i], |
31f15875 PM |
2735 | hnode) { |
2736 | m_help = nfct_help(exp->master); | |
794e6871 PM |
2737 | if (!strcmp(m_help->helper->name, name) && |
2738 | del_timer(&exp->timeout)) { | |
ebbf41df | 2739 | nf_ct_unlink_expect_report(exp, |
15e47304 | 2740 | NETLINK_CB(skb).portid, |
ebbf41df | 2741 | nlmsg_report(nlh)); |
31f15875 PM |
2742 | nf_ct_expect_put(exp); |
2743 | } | |
c1d10adb PNA |
2744 | } |
2745 | } | |
ca7433df | 2746 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb PNA |
2747 | } else { |
2748 | /* This basically means we have to flush everything*/ | |
ca7433df | 2749 | spin_lock_bh(&nf_conntrack_expect_lock); |
31f15875 | 2750 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
b67bfe0d | 2751 | hlist_for_each_entry_safe(exp, next, |
9592a5c0 | 2752 | &net->ct.expect_hash[i], |
31f15875 PM |
2753 | hnode) { |
2754 | if (del_timer(&exp->timeout)) { | |
ebbf41df | 2755 | nf_ct_unlink_expect_report(exp, |
15e47304 | 2756 | NETLINK_CB(skb).portid, |
ebbf41df | 2757 | nlmsg_report(nlh)); |
31f15875 PM |
2758 | nf_ct_expect_put(exp); |
2759 | } | |
c1d10adb PNA |
2760 | } |
2761 | } | |
ca7433df | 2762 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb PNA |
2763 | } |
2764 | ||
2765 | return 0; | |
2766 | } | |
2767 | static int | |
39938324 PM |
2768 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
2769 | const struct nlattr * const cda[]) | |
c1d10adb | 2770 | { |
9768e1ac KW |
2771 | if (cda[CTA_EXPECT_TIMEOUT]) { |
2772 | if (!del_timer(&x->timeout)) | |
2773 | return -ETIME; | |
2774 | ||
2775 | x->timeout.expires = jiffies + | |
2776 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
2777 | add_timer(&x->timeout); | |
2778 | } | |
2779 | return 0; | |
c1d10adb PNA |
2780 | } |
2781 | ||
076a0ca0 PNA |
2782 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
2783 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, | |
2784 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, | |
2785 | }; | |
2786 | ||
2787 | static int | |
2788 | ctnetlink_parse_expect_nat(const struct nlattr *attr, | |
2789 | struct nf_conntrack_expect *exp, | |
2790 | u_int8_t u3) | |
2791 | { | |
2792 | #ifdef CONFIG_NF_NAT_NEEDED | |
2793 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; | |
2794 | struct nf_conntrack_tuple nat_tuple = {}; | |
2795 | int err; | |
2796 | ||
130ffbc2 DB |
2797 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy); |
2798 | if (err < 0) | |
2799 | return err; | |
076a0ca0 PNA |
2800 | |
2801 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) | |
2802 | return -EINVAL; | |
2803 | ||
2804 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, | |
2805 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3); | |
2806 | if (err < 0) | |
2807 | return err; | |
2808 | ||
c7232c99 | 2809 | exp->saved_addr = nat_tuple.src.u3; |
076a0ca0 PNA |
2810 | exp->saved_proto = nat_tuple.src.u; |
2811 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); | |
2812 | ||
2813 | return 0; | |
2814 | #else | |
2815 | return -EOPNOTSUPP; | |
2816 | #endif | |
2817 | } | |
2818 | ||
0ef71ee1 PNA |
2819 | static struct nf_conntrack_expect * |
2820 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, | |
2821 | struct nf_conntrack_helper *helper, | |
2822 | struct nf_conntrack_tuple *tuple, | |
2823 | struct nf_conntrack_tuple *mask) | |
c1d10adb | 2824 | { |
0ef71ee1 | 2825 | u_int32_t class = 0; |
c1d10adb | 2826 | struct nf_conntrack_expect *exp; |
dc808fe2 | 2827 | struct nf_conn_help *help; |
0ef71ee1 | 2828 | int err; |
660fdb2a | 2829 | |
b8c5e52c PNA |
2830 | if (cda[CTA_EXPECT_CLASS] && helper) { |
2831 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); | |
0ef71ee1 PNA |
2832 | if (class > helper->expect_class_max) |
2833 | return ERR_PTR(-EINVAL); | |
b8c5e52c | 2834 | } |
6823645d | 2835 | exp = nf_ct_expect_alloc(ct); |
0ef71ee1 PNA |
2836 | if (!exp) |
2837 | return ERR_PTR(-ENOMEM); | |
2838 | ||
bc01befd PNA |
2839 | help = nfct_help(ct); |
2840 | if (!help) { | |
2841 | if (!cda[CTA_EXPECT_TIMEOUT]) { | |
2842 | err = -EINVAL; | |
1310b955 | 2843 | goto err_out; |
bc01befd PNA |
2844 | } |
2845 | exp->timeout.expires = | |
2846 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
601e68e1 | 2847 | |
bc01befd PNA |
2848 | exp->flags = NF_CT_EXPECT_USERSPACE; |
2849 | if (cda[CTA_EXPECT_FLAGS]) { | |
2850 | exp->flags |= | |
2851 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
2852 | } | |
2853 | } else { | |
2854 | if (cda[CTA_EXPECT_FLAGS]) { | |
2855 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
2856 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; | |
2857 | } else | |
2858 | exp->flags = 0; | |
2859 | } | |
544d5c7d PNA |
2860 | if (cda[CTA_EXPECT_FN]) { |
2861 | const char *name = nla_data(cda[CTA_EXPECT_FN]); | |
2862 | struct nf_ct_helper_expectfn *expfn; | |
2863 | ||
2864 | expfn = nf_ct_helper_expectfn_find_by_name(name); | |
2865 | if (expfn == NULL) { | |
2866 | err = -EINVAL; | |
2867 | goto err_out; | |
2868 | } | |
2869 | exp->expectfn = expfn->expectfn; | |
2870 | } else | |
2871 | exp->expectfn = NULL; | |
601e68e1 | 2872 | |
b8c5e52c | 2873 | exp->class = class; |
c1d10adb | 2874 | exp->master = ct; |
660fdb2a | 2875 | exp->helper = helper; |
0ef71ee1 PNA |
2876 | exp->tuple = *tuple; |
2877 | exp->mask.src.u3 = mask->src.u3; | |
2878 | exp->mask.src.u.all = mask->src.u.all; | |
c1d10adb | 2879 | |
076a0ca0 PNA |
2880 | if (cda[CTA_EXPECT_NAT]) { |
2881 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], | |
0ef71ee1 | 2882 | exp, nf_ct_l3num(ct)); |
076a0ca0 PNA |
2883 | if (err < 0) |
2884 | goto err_out; | |
2885 | } | |
0ef71ee1 | 2886 | return exp; |
076a0ca0 | 2887 | err_out: |
6823645d | 2888 | nf_ct_expect_put(exp); |
0ef71ee1 PNA |
2889 | return ERR_PTR(err); |
2890 | } | |
2891 | ||
2892 | static int | |
2893 | ctnetlink_create_expect(struct net *net, u16 zone, | |
2894 | const struct nlattr * const cda[], | |
2895 | u_int8_t u3, u32 portid, int report) | |
2896 | { | |
2897 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
2898 | struct nf_conntrack_tuple_hash *h = NULL; | |
2899 | struct nf_conntrack_helper *helper = NULL; | |
2900 | struct nf_conntrack_expect *exp; | |
2901 | struct nf_conn *ct; | |
2902 | int err; | |
2903 | ||
2904 | /* caller guarantees that those three CTA_EXPECT_* exist */ | |
2905 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
2906 | if (err < 0) | |
2907 | return err; | |
2908 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
2909 | if (err < 0) | |
2910 | return err; | |
2911 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
2912 | if (err < 0) | |
2913 | return err; | |
2914 | ||
2915 | /* Look for master conntrack of this expectation */ | |
2916 | h = nf_conntrack_find_get(net, zone, &master_tuple); | |
2917 | if (!h) | |
2918 | return -ENOENT; | |
2919 | ct = nf_ct_tuplehash_to_ctrack(h); | |
2920 | ||
2921 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
2922 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
2923 | ||
2924 | helper = __nf_conntrack_helper_find(helpname, u3, | |
2925 | nf_ct_protonum(ct)); | |
2926 | if (helper == NULL) { | |
2927 | #ifdef CONFIG_MODULES | |
2928 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
2929 | err = -EOPNOTSUPP; | |
2930 | goto err_ct; | |
2931 | } | |
2932 | helper = __nf_conntrack_helper_find(helpname, u3, | |
2933 | nf_ct_protonum(ct)); | |
2934 | if (helper) { | |
2935 | err = -EAGAIN; | |
2936 | goto err_ct; | |
2937 | } | |
2938 | #endif | |
2939 | err = -EOPNOTSUPP; | |
2940 | goto err_ct; | |
2941 | } | |
2942 | } | |
2943 | ||
2944 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); | |
2945 | if (IS_ERR(exp)) { | |
2946 | err = PTR_ERR(exp); | |
2947 | goto err_ct; | |
2948 | } | |
2949 | ||
2950 | err = nf_ct_expect_related_report(exp, portid, report); | |
2951 | if (err < 0) | |
2952 | goto err_exp; | |
2953 | ||
2954 | return 0; | |
2955 | err_exp: | |
2956 | nf_ct_expect_put(exp); | |
2957 | err_ct: | |
2958 | nf_ct_put(ct); | |
c1d10adb PNA |
2959 | return err; |
2960 | } | |
2961 | ||
2962 | static int | |
2963 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
2964 | const struct nlmsghdr *nlh, |
2965 | const struct nlattr * const cda[]) | |
c1d10adb | 2966 | { |
9592a5c0 | 2967 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
2968 | struct nf_conntrack_tuple tuple; |
2969 | struct nf_conntrack_expect *exp; | |
96bcf938 | 2970 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2971 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
2972 | u16 zone; |
2973 | int err; | |
c1d10adb | 2974 | |
df6fb868 PM |
2975 | if (!cda[CTA_EXPECT_TUPLE] |
2976 | || !cda[CTA_EXPECT_MASK] | |
2977 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
2978 | return -EINVAL; |
2979 | ||
ef00f89f PM |
2980 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2981 | if (err < 0) | |
2982 | return err; | |
2983 | ||
c1d10adb PNA |
2984 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
2985 | if (err < 0) | |
2986 | return err; | |
2987 | ||
ca7433df | 2988 | spin_lock_bh(&nf_conntrack_expect_lock); |
ef00f89f | 2989 | exp = __nf_ct_expect_find(net, zone, &tuple); |
c1d10adb PNA |
2990 | |
2991 | if (!exp) { | |
ca7433df | 2992 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 2993 | err = -ENOENT; |
19abb7b0 | 2994 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
ef00f89f | 2995 | err = ctnetlink_create_expect(net, zone, cda, |
19abb7b0 | 2996 | u3, |
15e47304 | 2997 | NETLINK_CB(skb).portid, |
19abb7b0 PNA |
2998 | nlmsg_report(nlh)); |
2999 | } | |
c1d10adb PNA |
3000 | return err; |
3001 | } | |
3002 | ||
3003 | err = -EEXIST; | |
3004 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
3005 | err = ctnetlink_change_expect(exp, cda); | |
ca7433df | 3006 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 3007 | |
c1d10adb PNA |
3008 | return err; |
3009 | } | |
3010 | ||
392025f8 | 3011 | static int |
15e47304 | 3012 | ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu, |
392025f8 PNA |
3013 | const struct ip_conntrack_stat *st) |
3014 | { | |
3015 | struct nlmsghdr *nlh; | |
3016 | struct nfgenmsg *nfmsg; | |
15e47304 | 3017 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
3018 | |
3019 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU); | |
15e47304 | 3020 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
3021 | if (nlh == NULL) |
3022 | goto nlmsg_failure; | |
3023 | ||
3024 | nfmsg = nlmsg_data(nlh); | |
3025 | nfmsg->nfgen_family = AF_UNSPEC; | |
3026 | nfmsg->version = NFNETLINK_V0; | |
3027 | nfmsg->res_id = htons(cpu); | |
3028 | ||
3029 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || | |
3030 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || | |
3031 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) | |
3032 | goto nla_put_failure; | |
3033 | ||
3034 | nlmsg_end(skb, nlh); | |
3035 | return skb->len; | |
3036 | ||
3037 | nla_put_failure: | |
3038 | nlmsg_failure: | |
3039 | nlmsg_cancel(skb, nlh); | |
3040 | return -1; | |
3041 | } | |
3042 | ||
3043 | static int | |
3044 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3045 | { | |
3046 | int cpu; | |
3047 | struct net *net = sock_net(skb->sk); | |
3048 | ||
3049 | if (cb->args[0] == nr_cpu_ids) | |
3050 | return 0; | |
3051 | ||
3052 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
3053 | const struct ip_conntrack_stat *st; | |
3054 | ||
3055 | if (!cpu_possible(cpu)) | |
3056 | continue; | |
3057 | ||
3058 | st = per_cpu_ptr(net->ct.stat, cpu); | |
15e47304 | 3059 | if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
3060 | cb->nlh->nlmsg_seq, |
3061 | cpu, st) < 0) | |
3062 | break; | |
3063 | } | |
3064 | cb->args[0] = cpu; | |
3065 | ||
3066 | return skb->len; | |
3067 | } | |
3068 | ||
3069 | static int | |
3070 | ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb, | |
3071 | const struct nlmsghdr *nlh, | |
3072 | const struct nlattr * const cda[]) | |
3073 | { | |
3074 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
3075 | struct netlink_dump_control c = { | |
3076 | .dump = ctnetlink_exp_stat_cpu_dump, | |
3077 | }; | |
3078 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
3079 | } | |
3080 | ||
3081 | return 0; | |
3082 | } | |
3083 | ||
c1d10adb | 3084 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
e34d5c1a PNA |
3085 | static struct nf_ct_event_notifier ctnl_notifier = { |
3086 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
3087 | }; |
3088 | ||
e34d5c1a PNA |
3089 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
3090 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
3091 | }; |
3092 | #endif | |
3093 | ||
7c8d4cb4 | 3094 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 3095 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
3096 | .attr_count = CTA_MAX, |
3097 | .policy = ct_nla_policy }, | |
c1d10adb | 3098 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3099 | .attr_count = CTA_MAX, |
3100 | .policy = ct_nla_policy }, | |
c1d10adb | 3101 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
3102 | .attr_count = CTA_MAX, |
3103 | .policy = ct_nla_policy }, | |
c1d10adb | 3104 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3105 | .attr_count = CTA_MAX, |
3106 | .policy = ct_nla_policy }, | |
392025f8 PNA |
3107 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
3108 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, | |
d871befe PNA |
3109 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
3110 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, | |
c1d10adb PNA |
3111 | }; |
3112 | ||
7c8d4cb4 | 3113 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 3114 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
3115 | .attr_count = CTA_EXPECT_MAX, |
3116 | .policy = exp_nla_policy }, | |
c1d10adb | 3117 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
3118 | .attr_count = CTA_EXPECT_MAX, |
3119 | .policy = exp_nla_policy }, | |
c1d10adb | 3120 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
3121 | .attr_count = CTA_EXPECT_MAX, |
3122 | .policy = exp_nla_policy }, | |
392025f8 | 3123 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
c1d10adb PNA |
3124 | }; |
3125 | ||
7c8d4cb4 | 3126 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
3127 | .name = "conntrack", |
3128 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
3129 | .cb_count = IPCTNL_MSG_MAX, | |
3130 | .cb = ctnl_cb, | |
3131 | }; | |
3132 | ||
7c8d4cb4 | 3133 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
3134 | .name = "conntrack_expect", |
3135 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
3136 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
3137 | .cb = ctnl_exp_cb, | |
3138 | }; | |
3139 | ||
d2483dde | 3140 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 3141 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 3142 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb | 3143 | |
70e9942f PNA |
3144 | static int __net_init ctnetlink_net_init(struct net *net) |
3145 | { | |
3146 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3147 | int ret; | |
3148 | ||
3149 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); | |
3150 | if (ret < 0) { | |
3151 | pr_err("ctnetlink_init: cannot register notifier.\n"); | |
3152 | goto err_out; | |
3153 | } | |
3154 | ||
3155 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); | |
3156 | if (ret < 0) { | |
3157 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); | |
3158 | goto err_unreg_notifier; | |
3159 | } | |
3160 | #endif | |
3161 | return 0; | |
3162 | ||
3163 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3164 | err_unreg_notifier: | |
3165 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3166 | err_out: | |
3167 | return ret; | |
3168 | #endif | |
3169 | } | |
3170 | ||
3171 | static void ctnetlink_net_exit(struct net *net) | |
3172 | { | |
3173 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3174 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); | |
3175 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3176 | #endif | |
3177 | } | |
3178 | ||
3179 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) | |
3180 | { | |
3181 | struct net *net; | |
3182 | ||
3183 | list_for_each_entry(net, net_exit_list, exit_list) | |
3184 | ctnetlink_net_exit(net); | |
3185 | } | |
3186 | ||
3187 | static struct pernet_operations ctnetlink_net_ops = { | |
3188 | .init = ctnetlink_net_init, | |
3189 | .exit_batch = ctnetlink_net_exit_batch, | |
3190 | }; | |
3191 | ||
c1d10adb PNA |
3192 | static int __init ctnetlink_init(void) |
3193 | { | |
3194 | int ret; | |
3195 | ||
654d0fbd | 3196 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
c1d10adb PNA |
3197 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
3198 | if (ret < 0) { | |
654d0fbd | 3199 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
c1d10adb PNA |
3200 | goto err_out; |
3201 | } | |
3202 | ||
3203 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
3204 | if (ret < 0) { | |
654d0fbd | 3205 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
c1d10adb PNA |
3206 | goto err_unreg_subsys; |
3207 | } | |
3208 | ||
ef6acf68 JL |
3209 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
3210 | if (ret < 0) { | |
70e9942f | 3211 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
c1d10adb PNA |
3212 | goto err_unreg_exp_subsys; |
3213 | } | |
7c622345 | 3214 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
9cb01766 PNA |
3215 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
3216 | RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook); | |
3217 | #endif | |
c1d10adb PNA |
3218 | return 0; |
3219 | ||
c1d10adb PNA |
3220 | err_unreg_exp_subsys: |
3221 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
c1d10adb PNA |
3222 | err_unreg_subsys: |
3223 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
3224 | err_out: | |
3225 | return ret; | |
3226 | } | |
3227 | ||
3228 | static void __exit ctnetlink_exit(void) | |
3229 | { | |
654d0fbd | 3230 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
c1d10adb | 3231 | |
70e9942f | 3232 | unregister_pernet_subsys(&ctnetlink_net_ops); |
c1d10adb PNA |
3233 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
3234 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
7c622345 | 3235 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
9cb01766 PNA |
3236 | RCU_INIT_POINTER(nfq_ct_hook, NULL); |
3237 | #endif | |
c1d10adb PNA |
3238 | } |
3239 | ||
3240 | module_init(ctnetlink_init); | |
3241 | module_exit(ctnetlink_exit); |