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; |
0f298a28 PNA |
767 | #ifdef CONFIG_NF_CONNTRACK_MARK |
768 | const struct ctnetlink_dump_filter *filter = cb->data; | |
769 | #endif | |
3b988ece | 770 | |
13ee6ac5 | 771 | spin_lock_bh(&nf_conntrack_lock); |
d205dc40 | 772 | last = (struct nf_conn *)cb->args[1]; |
9ab99d5a | 773 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
89f2e218 | 774 | restart: |
13ee6ac5 | 775 | hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]], |
ea781f19 | 776 | hnnode) { |
5b1158e9 | 777 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
778 | continue; |
779 | ct = nf_ct_tuplehash_to_ctrack(h); | |
87711cb8 PNA |
780 | /* Dump entries of a given L3 protocol number. |
781 | * If it is not specified, ie. l3proto == 0, | |
782 | * then dump everything. */ | |
5e8fbe2a | 783 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
13ee6ac5 | 784 | continue; |
d205dc40 PM |
785 | if (cb->args[1]) { |
786 | if (ct != last) | |
13ee6ac5 | 787 | continue; |
d205dc40 | 788 | cb->args[1] = 0; |
89f2e218 | 789 | } |
0f298a28 PNA |
790 | #ifdef CONFIG_NF_CONNTRACK_MARK |
791 | if (filter && !((ct->mark & filter->mark.mask) == | |
792 | filter->mark.val)) { | |
793 | continue; | |
794 | } | |
795 | #endif | |
3b988ece HS |
796 | rcu_read_lock(); |
797 | res = | |
15e47304 | 798 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
3b988ece HS |
799 | cb->nlh->nlmsg_seq, |
800 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
801 | ct); | |
802 | rcu_read_unlock(); | |
803 | if (res < 0) { | |
c71caf41 | 804 | nf_conntrack_get(&ct->ct_general); |
89f2e218 | 805 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 806 | goto out; |
89f2e218 PM |
807 | } |
808 | } | |
d205dc40 | 809 | if (cb->args[1]) { |
89f2e218 PM |
810 | cb->args[1] = 0; |
811 | goto restart; | |
c1d10adb PNA |
812 | } |
813 | } | |
89f2e218 | 814 | out: |
13ee6ac5 | 815 | spin_unlock_bh(&nf_conntrack_lock); |
d205dc40 PM |
816 | if (last) |
817 | nf_ct_put(last); | |
c1d10adb | 818 | |
c1d10adb PNA |
819 | return skb->len; |
820 | } | |
821 | ||
c1d10adb | 822 | static inline int |
df6fb868 | 823 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 824 | { |
df6fb868 | 825 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
826 | struct nf_conntrack_l3proto *l3proto; |
827 | int ret = 0; | |
828 | ||
130ffbc2 DB |
829 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
830 | if (ret < 0) | |
831 | return ret; | |
c1d10adb | 832 | |
cd91566e FW |
833 | rcu_read_lock(); |
834 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 835 | |
f73e924c PM |
836 | if (likely(l3proto->nlattr_to_tuple)) { |
837 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
838 | l3proto->nla_policy); | |
839 | if (ret == 0) | |
840 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
841 | } | |
c1d10adb | 842 | |
cd91566e | 843 | rcu_read_unlock(); |
c1d10adb | 844 | |
c1d10adb PNA |
845 | return ret; |
846 | } | |
847 | ||
f73e924c PM |
848 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
849 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
850 | }; |
851 | ||
852 | static inline int | |
df6fb868 | 853 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
854 | struct nf_conntrack_tuple *tuple) |
855 | { | |
df6fb868 | 856 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 857 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
858 | int ret = 0; |
859 | ||
f73e924c PM |
860 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
861 | if (ret < 0) | |
862 | return ret; | |
c1d10adb | 863 | |
df6fb868 | 864 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 865 | return -EINVAL; |
77236b6e | 866 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 867 | |
cd91566e FW |
868 | rcu_read_lock(); |
869 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 870 | |
f73e924c PM |
871 | if (likely(l4proto->nlattr_to_tuple)) { |
872 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
873 | l4proto->nla_policy); | |
874 | if (ret == 0) | |
875 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
876 | } | |
c1d10adb | 877 | |
cd91566e | 878 | rcu_read_unlock(); |
601e68e1 | 879 | |
c1d10adb PNA |
880 | return ret; |
881 | } | |
882 | ||
d0b0268f PM |
883 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
884 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
885 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
886 | }; | |
887 | ||
bb5cf80e | 888 | static int |
39938324 PM |
889 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
890 | struct nf_conntrack_tuple *tuple, | |
a00f1f36 | 891 | enum ctattr_type type, u_int8_t l3num) |
c1d10adb | 892 | { |
df6fb868 | 893 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
894 | int err; |
895 | ||
c1d10adb PNA |
896 | memset(tuple, 0, sizeof(*tuple)); |
897 | ||
130ffbc2 DB |
898 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
899 | if (err < 0) | |
900 | return err; | |
c1d10adb | 901 | |
df6fb868 | 902 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
903 | return -EINVAL; |
904 | ||
905 | tuple->src.l3num = l3num; | |
906 | ||
df6fb868 | 907 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
908 | if (err < 0) |
909 | return err; | |
910 | ||
df6fb868 | 911 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
912 | return -EINVAL; |
913 | ||
df6fb868 | 914 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
915 | if (err < 0) |
916 | return err; | |
917 | ||
918 | /* orig and expect tuples get DIR_ORIGINAL */ | |
919 | if (type == CTA_TUPLE_REPLY) | |
920 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
921 | else | |
922 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
923 | ||
c1d10adb PNA |
924 | return 0; |
925 | } | |
926 | ||
ef00f89f PM |
927 | static int |
928 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) | |
929 | { | |
930 | if (attr) | |
931 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
932 | *zone = ntohs(nla_get_be16(attr)); | |
933 | #else | |
934 | return -EOPNOTSUPP; | |
935 | #endif | |
936 | else | |
937 | *zone = 0; | |
938 | ||
939 | return 0; | |
940 | } | |
941 | ||
d0b0268f | 942 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
6d1fafca FW |
943 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
944 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
d0b0268f PM |
945 | }; |
946 | ||
c1d10adb | 947 | static inline int |
ae243bee PNA |
948 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
949 | struct nlattr **helpinfo) | |
c1d10adb | 950 | { |
130ffbc2 | 951 | int err; |
df6fb868 | 952 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 953 | |
130ffbc2 DB |
954 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
955 | if (err < 0) | |
956 | return err; | |
c1d10adb | 957 | |
df6fb868 | 958 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
959 | return -EINVAL; |
960 | ||
df6fb868 | 961 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb | 962 | |
ae243bee PNA |
963 | if (tb[CTA_HELP_INFO]) |
964 | *helpinfo = tb[CTA_HELP_INFO]; | |
965 | ||
c1d10adb PNA |
966 | return 0; |
967 | } | |
968 | ||
9b21f6a9 | 969 | #define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE) |
f73e924c | 970 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
971 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
972 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 973 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
974 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
975 | [CTA_HELP] = { .type = NLA_NESTED }, | |
976 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
977 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
978 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 979 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
980 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
981 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
6d1fafca FW |
982 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
983 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, | |
ef00f89f | 984 | [CTA_ZONE] = { .type = NLA_U16 }, |
0f298a28 | 985 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
9b21f6a9 FW |
986 | [CTA_LABELS] = { .type = NLA_BINARY, |
987 | .len = __CTA_LABELS_MAX_LENGTH }, | |
988 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, | |
989 | .len = __CTA_LABELS_MAX_LENGTH }, | |
c1d10adb PNA |
990 | }; |
991 | ||
992 | static int | |
601e68e1 | 993 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
994 | const struct nlmsghdr *nlh, |
995 | const struct nlattr * const cda[]) | |
c1d10adb | 996 | { |
9592a5c0 | 997 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
998 | struct nf_conntrack_tuple_hash *h; |
999 | struct nf_conntrack_tuple tuple; | |
1000 | struct nf_conn *ct; | |
96bcf938 | 1001 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1002 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1003 | u16 zone; |
1004 | int err; | |
1005 | ||
1006 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1007 | if (err < 0) | |
1008 | return err; | |
c1d10adb | 1009 | |
df6fb868 | 1010 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 1011 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 1012 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
1013 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
1014 | else { | |
1015 | /* Flush the whole table */ | |
9592a5c0 | 1016 | nf_conntrack_flush_report(net, |
15e47304 | 1017 | NETLINK_CB(skb).portid, |
274d383b | 1018 | nlmsg_report(nlh)); |
c1d10adb PNA |
1019 | return 0; |
1020 | } | |
1021 | ||
1022 | if (err < 0) | |
1023 | return err; | |
1024 | ||
ef00f89f | 1025 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 1026 | if (!h) |
c1d10adb | 1027 | return -ENOENT; |
c1d10adb PNA |
1028 | |
1029 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 1030 | |
df6fb868 | 1031 | if (cda[CTA_ID]) { |
77236b6e | 1032 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 1033 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
1034 | nf_ct_put(ct); |
1035 | return -ENOENT; | |
1036 | } | |
601e68e1 | 1037 | } |
c1d10adb | 1038 | |
02982c27 FW |
1039 | if (del_timer(&ct->timeout)) |
1040 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); | |
1041 | ||
c1d10adb | 1042 | nf_ct_put(ct); |
c1d10adb PNA |
1043 | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static int | |
601e68e1 | 1048 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1049 | const struct nlmsghdr *nlh, |
1050 | const struct nlattr * const cda[]) | |
c1d10adb | 1051 | { |
9592a5c0 | 1052 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1053 | struct nf_conntrack_tuple_hash *h; |
1054 | struct nf_conntrack_tuple tuple; | |
1055 | struct nf_conn *ct; | |
1056 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 1057 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1058 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1059 | u16 zone; |
1060 | int err; | |
c1d10adb | 1061 | |
80d326fa PNA |
1062 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
1063 | struct netlink_dump_control c = { | |
1064 | .dump = ctnetlink_dump_table, | |
1065 | .done = ctnetlink_done, | |
1066 | }; | |
0f298a28 PNA |
1067 | #ifdef CONFIG_NF_CONNTRACK_MARK |
1068 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { | |
1069 | struct ctnetlink_dump_filter *filter; | |
1070 | ||
1071 | filter = kzalloc(sizeof(struct ctnetlink_dump_filter), | |
1072 | GFP_ATOMIC); | |
1073 | if (filter == NULL) | |
1074 | return -ENOMEM; | |
1075 | ||
1076 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); | |
1077 | filter->mark.mask = | |
1078 | ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
1079 | c.data = filter; | |
1080 | } | |
1081 | #endif | |
80d326fa PNA |
1082 | return netlink_dump_start(ctnl, skb, nlh, &c); |
1083 | } | |
c1d10adb | 1084 | |
ef00f89f PM |
1085 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
1086 | if (err < 0) | |
1087 | return err; | |
1088 | ||
df6fb868 | 1089 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 1090 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 1091 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
1092 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
1093 | else | |
1094 | return -EINVAL; | |
1095 | ||
1096 | if (err < 0) | |
1097 | return err; | |
1098 | ||
ef00f89f | 1099 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 1100 | if (!h) |
c1d10adb | 1101 | return -ENOENT; |
9ea8cfd6 | 1102 | |
c1d10adb PNA |
1103 | ct = nf_ct_tuplehash_to_ctrack(h); |
1104 | ||
1105 | err = -ENOMEM; | |
96bcf938 PNA |
1106 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1107 | if (skb2 == NULL) { | |
c1d10adb PNA |
1108 | nf_ct_put(ct); |
1109 | return -ENOMEM; | |
1110 | } | |
c1d10adb | 1111 | |
528a3a6f | 1112 | rcu_read_lock(); |
15e47304 | 1113 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, |
80e60e67 | 1114 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
528a3a6f | 1115 | rcu_read_unlock(); |
c1d10adb PNA |
1116 | nf_ct_put(ct); |
1117 | if (err <= 0) | |
1118 | goto free; | |
1119 | ||
15e47304 | 1120 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
c1d10adb PNA |
1121 | if (err < 0) |
1122 | goto out; | |
1123 | ||
c1d10adb PNA |
1124 | return 0; |
1125 | ||
1126 | free: | |
1127 | kfree_skb(skb2); | |
1128 | out: | |
f31e8d49 PNA |
1129 | /* this avoids a loop in nfnetlink. */ |
1130 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
1131 | } |
1132 | ||
d871befe PNA |
1133 | static int ctnetlink_done_list(struct netlink_callback *cb) |
1134 | { | |
1135 | if (cb->args[1]) | |
1136 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | static int | |
1141 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, | |
1142 | struct hlist_nulls_head *list) | |
1143 | { | |
1144 | struct nf_conn *ct, *last; | |
1145 | struct nf_conntrack_tuple_hash *h; | |
1146 | struct hlist_nulls_node *n; | |
1147 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
1148 | u_int8_t l3proto = nfmsg->nfgen_family; | |
1149 | int res; | |
1150 | ||
1151 | if (cb->args[2]) | |
1152 | return 0; | |
1153 | ||
1154 | spin_lock_bh(&nf_conntrack_lock); | |
1155 | last = (struct nf_conn *)cb->args[1]; | |
1156 | restart: | |
1157 | hlist_nulls_for_each_entry(h, n, list, hnnode) { | |
1158 | ct = nf_ct_tuplehash_to_ctrack(h); | |
1159 | if (l3proto && nf_ct_l3num(ct) != l3proto) | |
1160 | continue; | |
1161 | if (cb->args[1]) { | |
1162 | if (ct != last) | |
1163 | continue; | |
1164 | cb->args[1] = 0; | |
1165 | } | |
1166 | rcu_read_lock(); | |
1167 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
1168 | cb->nlh->nlmsg_seq, | |
1169 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
1170 | ct); | |
1171 | rcu_read_unlock(); | |
1172 | if (res < 0) { | |
1173 | nf_conntrack_get(&ct->ct_general); | |
1174 | cb->args[1] = (unsigned long)ct; | |
1175 | goto out; | |
1176 | } | |
1177 | } | |
1178 | if (cb->args[1]) { | |
1179 | cb->args[1] = 0; | |
1180 | goto restart; | |
1181 | } else | |
1182 | cb->args[2] = 1; | |
1183 | out: | |
1184 | spin_unlock_bh(&nf_conntrack_lock); | |
1185 | if (last) | |
1186 | nf_ct_put(last); | |
1187 | ||
1188 | return skb->len; | |
1189 | } | |
1190 | ||
1191 | static int | |
1192 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) | |
1193 | { | |
1194 | struct net *net = sock_net(skb->sk); | |
1195 | ||
1196 | return ctnetlink_dump_list(skb, cb, &net->ct.dying); | |
1197 | } | |
1198 | ||
1199 | static int | |
1200 | ctnetlink_get_ct_dying(struct sock *ctnl, struct sk_buff *skb, | |
1201 | const struct nlmsghdr *nlh, | |
1202 | const struct nlattr * const cda[]) | |
1203 | { | |
1204 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1205 | struct netlink_dump_control c = { | |
1206 | .dump = ctnetlink_dump_dying, | |
1207 | .done = ctnetlink_done_list, | |
1208 | }; | |
1209 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1210 | } | |
1211 | ||
1212 | return -EOPNOTSUPP; | |
1213 | } | |
1214 | ||
1215 | static int | |
1216 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) | |
1217 | { | |
1218 | struct net *net = sock_net(skb->sk); | |
1219 | ||
1220 | return ctnetlink_dump_list(skb, cb, &net->ct.unconfirmed); | |
1221 | } | |
1222 | ||
1223 | static int | |
1224 | ctnetlink_get_ct_unconfirmed(struct sock *ctnl, struct sk_buff *skb, | |
1225 | const struct nlmsghdr *nlh, | |
1226 | const struct nlattr * const cda[]) | |
1227 | { | |
1228 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1229 | struct netlink_dump_control c = { | |
1230 | .dump = ctnetlink_dump_unconfirmed, | |
1231 | .done = ctnetlink_done_list, | |
1232 | }; | |
1233 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1234 | } | |
1235 | ||
1236 | return -EOPNOTSUPP; | |
1237 | } | |
1238 | ||
67671841 | 1239 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
1240 | static int |
1241 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
1242 | enum nf_nat_manip_type manip, | |
39938324 | 1243 | const struct nlattr *attr) |
e6a7d3c0 PNA |
1244 | { |
1245 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
c7232c99 | 1246 | int err; |
e6a7d3c0 PNA |
1247 | |
1248 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
1249 | if (!parse_nat_setup) { | |
95a5afca | 1250 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 1251 | rcu_read_unlock(); |
c14b78e7 | 1252 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1253 | if (request_module("nf-nat") < 0) { |
c14b78e7 | 1254 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1255 | rcu_read_lock(); |
1256 | return -EOPNOTSUPP; | |
1257 | } | |
c14b78e7 | 1258 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1259 | rcu_read_lock(); |
1260 | if (nfnetlink_parse_nat_setup_hook) | |
1261 | return -EAGAIN; | |
1262 | #endif | |
1263 | return -EOPNOTSUPP; | |
1264 | } | |
1265 | ||
c7232c99 PM |
1266 | err = parse_nat_setup(ct, manip, attr); |
1267 | if (err == -EAGAIN) { | |
1268 | #ifdef CONFIG_MODULES | |
1269 | rcu_read_unlock(); | |
c14b78e7 | 1270 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1271 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
c14b78e7 | 1272 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1273 | rcu_read_lock(); |
1274 | return -EOPNOTSUPP; | |
1275 | } | |
c14b78e7 | 1276 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1277 | rcu_read_lock(); |
1278 | #else | |
1279 | err = -EOPNOTSUPP; | |
1280 | #endif | |
1281 | } | |
1282 | return err; | |
e6a7d3c0 | 1283 | } |
67671841 | 1284 | #endif |
e6a7d3c0 | 1285 | |
bb5cf80e | 1286 | static int |
39938324 | 1287 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1288 | { |
1289 | unsigned long d; | |
77236b6e | 1290 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
1291 | d = ct->status ^ status; |
1292 | ||
1293 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
1294 | /* unchangeable */ | |
0adf9d67 | 1295 | return -EBUSY; |
601e68e1 | 1296 | |
c1d10adb PNA |
1297 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
1298 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 1299 | return -EBUSY; |
601e68e1 | 1300 | |
c1d10adb PNA |
1301 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
1302 | /* ASSURED bit can only be set */ | |
0adf9d67 | 1303 | return -EBUSY; |
c1d10adb | 1304 | |
c1d10adb PNA |
1305 | /* Be careful here, modifying NAT bits can screw up things, |
1306 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 1307 | * nf_nat_range. */ |
c1d10adb PNA |
1308 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
1309 | return 0; | |
1310 | } | |
1311 | ||
e6a7d3c0 | 1312 | static int |
39938324 | 1313 | ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1314 | { |
1315 | #ifdef CONFIG_NF_NAT_NEEDED | |
1316 | int ret; | |
1317 | ||
1318 | if (cda[CTA_NAT_DST]) { | |
1319 | ret = ctnetlink_parse_nat_setup(ct, | |
cbc9f2f4 | 1320 | NF_NAT_MANIP_DST, |
e6a7d3c0 PNA |
1321 | cda[CTA_NAT_DST]); |
1322 | if (ret < 0) | |
1323 | return ret; | |
1324 | } | |
1325 | if (cda[CTA_NAT_SRC]) { | |
1326 | ret = ctnetlink_parse_nat_setup(ct, | |
cbc9f2f4 | 1327 | NF_NAT_MANIP_SRC, |
e6a7d3c0 PNA |
1328 | cda[CTA_NAT_SRC]); |
1329 | if (ret < 0) | |
1330 | return ret; | |
1331 | } | |
1332 | return 0; | |
1333 | #else | |
1334 | return -EOPNOTSUPP; | |
1335 | #endif | |
1336 | } | |
c1d10adb PNA |
1337 | |
1338 | static inline int | |
39938324 | 1339 | ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1340 | { |
1341 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1342 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1343 | char *helpname = NULL; |
ae243bee | 1344 | struct nlattr *helpinfo = NULL; |
c1d10adb PNA |
1345 | int err; |
1346 | ||
c1d10adb PNA |
1347 | /* don't change helper of sibling connections */ |
1348 | if (ct->master) | |
0adf9d67 | 1349 | return -EBUSY; |
c1d10adb | 1350 | |
ae243bee | 1351 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
c1d10adb PNA |
1352 | if (err < 0) |
1353 | return err; | |
1354 | ||
df293bbb YK |
1355 | if (!strcmp(helpname, "")) { |
1356 | if (help && help->helper) { | |
c1d10adb PNA |
1357 | /* we had a helper before ... */ |
1358 | nf_ct_remove_expectations(ct); | |
a9b3cd7f | 1359 | RCU_INIT_POINTER(help->helper, NULL); |
c1d10adb | 1360 | } |
df293bbb YK |
1361 | |
1362 | return 0; | |
c1d10adb | 1363 | } |
601e68e1 | 1364 | |
794e6871 PM |
1365 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1366 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1367 | if (helper == NULL) { |
1368 | #ifdef CONFIG_MODULES | |
1369 | spin_unlock_bh(&nf_conntrack_lock); | |
1370 | ||
1371 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1372 | spin_lock_bh(&nf_conntrack_lock); | |
1373 | return -EOPNOTSUPP; | |
1374 | } | |
1375 | ||
1376 | spin_lock_bh(&nf_conntrack_lock); | |
794e6871 PM |
1377 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1378 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1379 | if (helper) |
1380 | return -EAGAIN; | |
1381 | #endif | |
0adf9d67 | 1382 | return -EOPNOTSUPP; |
226c0c0e | 1383 | } |
df293bbb | 1384 | |
ceceae1b | 1385 | if (help) { |
ae243bee PNA |
1386 | if (help->helper == helper) { |
1387 | /* update private helper data if allowed. */ | |
7be54ca4 | 1388 | if (helper->from_nlattr) |
ae243bee | 1389 | helper->from_nlattr(helpinfo, ct); |
ceceae1b | 1390 | return 0; |
fd7462de | 1391 | } else |
ceceae1b | 1392 | return -EBUSY; |
ceceae1b | 1393 | } |
df293bbb | 1394 | |
fd7462de PNA |
1395 | /* we cannot set a helper for an existing conntrack */ |
1396 | return -EOPNOTSUPP; | |
c1d10adb PNA |
1397 | } |
1398 | ||
1399 | static inline int | |
39938324 | 1400 | ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1401 | { |
77236b6e | 1402 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1403 | |
c1d10adb PNA |
1404 | if (!del_timer(&ct->timeout)) |
1405 | return -ETIME; | |
1406 | ||
1407 | ct->timeout.expires = jiffies + timeout * HZ; | |
1408 | add_timer(&ct->timeout); | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
d0b0268f PM |
1413 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1414 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1415 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1416 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1417 | }; | |
1418 | ||
c1d10adb | 1419 | static inline int |
39938324 | 1420 | ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1421 | { |
39938324 PM |
1422 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
1423 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; | |
605dcad6 | 1424 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1425 | int err = 0; |
1426 | ||
130ffbc2 DB |
1427 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
1428 | if (err < 0) | |
1429 | return err; | |
c1d10adb | 1430 | |
cd91566e FW |
1431 | rcu_read_lock(); |
1432 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1433 | if (l4proto->from_nlattr) |
1434 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1435 | rcu_read_unlock(); |
c1d10adb PNA |
1436 | |
1437 | return err; | |
1438 | } | |
1439 | ||
41d73ec0 PM |
1440 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
1441 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1442 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1443 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
d0b0268f PM |
1444 | }; |
1445 | ||
13eae15a | 1446 | static inline int |
41d73ec0 | 1447 | change_seq_adj(struct nf_ct_seqadj *seq, const struct nlattr * const attr) |
13eae15a | 1448 | { |
130ffbc2 | 1449 | int err; |
41d73ec0 | 1450 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
13eae15a | 1451 | |
41d73ec0 | 1452 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy); |
130ffbc2 DB |
1453 | if (err < 0) |
1454 | return err; | |
13eae15a | 1455 | |
41d73ec0 | 1456 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
13eae15a PNA |
1457 | return -EINVAL; |
1458 | ||
41d73ec0 PM |
1459 | seq->correction_pos = |
1460 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); | |
13eae15a | 1461 | |
41d73ec0 | 1462 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
13eae15a PNA |
1463 | return -EINVAL; |
1464 | ||
41d73ec0 PM |
1465 | seq->offset_before = |
1466 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); | |
13eae15a | 1467 | |
41d73ec0 | 1468 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
13eae15a PNA |
1469 | return -EINVAL; |
1470 | ||
41d73ec0 PM |
1471 | seq->offset_after = |
1472 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); | |
13eae15a PNA |
1473 | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | static int | |
41d73ec0 PM |
1478 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
1479 | const struct nlattr * const cda[]) | |
13eae15a | 1480 | { |
41d73ec0 | 1481 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
13eae15a | 1482 | int ret = 0; |
13eae15a | 1483 | |
41d73ec0 | 1484 | if (!seqadj) |
13eae15a PNA |
1485 | return 0; |
1486 | ||
41d73ec0 PM |
1487 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
1488 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], | |
1489 | cda[CTA_SEQ_ADJ_ORIG]); | |
13eae15a PNA |
1490 | if (ret < 0) |
1491 | return ret; | |
1492 | ||
1493 | ct->status |= IPS_SEQ_ADJUST; | |
1494 | } | |
1495 | ||
41d73ec0 PM |
1496 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
1497 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], | |
1498 | cda[CTA_SEQ_ADJ_REPLY]); | |
13eae15a PNA |
1499 | if (ret < 0) |
1500 | return ret; | |
1501 | ||
1502 | ct->status |= IPS_SEQ_ADJUST; | |
1503 | } | |
1504 | ||
1505 | return 0; | |
1506 | } | |
13eae15a | 1507 | |
9b21f6a9 FW |
1508 | static int |
1509 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) | |
1510 | { | |
1511 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
1512 | size_t len = nla_len(cda[CTA_LABELS]); | |
1513 | const void *mask = cda[CTA_LABELS_MASK]; | |
1514 | ||
1515 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ | |
1516 | return -EINVAL; | |
1517 | ||
1518 | if (mask) { | |
1519 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || | |
1520 | nla_len(cda[CTA_LABELS_MASK]) != len) | |
1521 | return -EINVAL; | |
1522 | mask = nla_data(cda[CTA_LABELS_MASK]); | |
1523 | } | |
1524 | ||
1525 | len /= sizeof(u32); | |
1526 | ||
1527 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); | |
1528 | #else | |
1529 | return -EOPNOTSUPP; | |
1530 | #endif | |
1531 | } | |
1532 | ||
c1d10adb | 1533 | static int |
39938324 PM |
1534 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1535 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1536 | { |
1537 | int err; | |
1538 | ||
e098360f PNA |
1539 | /* only allow NAT changes and master assignation for new conntracks */ |
1540 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1541 | return -EOPNOTSUPP; | |
1542 | ||
df6fb868 | 1543 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1544 | err = ctnetlink_change_helper(ct, cda); |
1545 | if (err < 0) | |
1546 | return err; | |
1547 | } | |
1548 | ||
df6fb868 | 1549 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1550 | err = ctnetlink_change_timeout(ct, cda); |
1551 | if (err < 0) | |
1552 | return err; | |
1553 | } | |
1554 | ||
df6fb868 | 1555 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1556 | err = ctnetlink_change_status(ct, cda); |
1557 | if (err < 0) | |
1558 | return err; | |
1559 | } | |
1560 | ||
df6fb868 | 1561 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1562 | err = ctnetlink_change_protoinfo(ct, cda); |
1563 | if (err < 0) | |
1564 | return err; | |
1565 | } | |
1566 | ||
bcd1e830 | 1567 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1568 | if (cda[CTA_MARK]) |
77236b6e | 1569 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1570 | #endif |
1571 | ||
41d73ec0 PM |
1572 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1573 | err = ctnetlink_change_seq_adj(ct, cda); | |
13eae15a PNA |
1574 | if (err < 0) |
1575 | return err; | |
1576 | } | |
41d73ec0 | 1577 | |
9b21f6a9 FW |
1578 | if (cda[CTA_LABELS]) { |
1579 | err = ctnetlink_attach_labels(ct, cda); | |
1580 | if (err < 0) | |
1581 | return err; | |
1582 | } | |
13eae15a | 1583 | |
c1d10adb PNA |
1584 | return 0; |
1585 | } | |
1586 | ||
f0a3c086 | 1587 | static struct nf_conn * |
ef00f89f | 1588 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
9592a5c0 | 1589 | const struct nlattr * const cda[], |
c1d10adb | 1590 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1591 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1592 | u8 u3) |
c1d10adb PNA |
1593 | { |
1594 | struct nf_conn *ct; | |
1595 | int err = -EINVAL; | |
ceceae1b | 1596 | struct nf_conntrack_helper *helper; |
315c34da | 1597 | struct nf_conn_tstamp *tstamp; |
c1d10adb | 1598 | |
ef00f89f | 1599 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1600 | if (IS_ERR(ct)) |
f0a3c086 | 1601 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1602 | |
df6fb868 | 1603 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1604 | goto err1; |
77236b6e | 1605 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1606 | |
1607 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
c1d10adb | 1608 | |
1575e7ea | 1609 | rcu_read_lock(); |
226c0c0e | 1610 | if (cda[CTA_HELP]) { |
29fe1b48 | 1611 | char *helpname = NULL; |
ae243bee PNA |
1612 | struct nlattr *helpinfo = NULL; |
1613 | ||
1614 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); | |
0f5b3e85 PM |
1615 | if (err < 0) |
1616 | goto err2; | |
226c0c0e | 1617 | |
794e6871 PM |
1618 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1619 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1620 | if (helper == NULL) { |
1621 | rcu_read_unlock(); | |
1622 | #ifdef CONFIG_MODULES | |
1623 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1624 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1625 | goto err1; |
226c0c0e PNA |
1626 | } |
1627 | ||
1628 | rcu_read_lock(); | |
794e6871 PM |
1629 | helper = __nf_conntrack_helper_find(helpname, |
1630 | nf_ct_l3num(ct), | |
1631 | nf_ct_protonum(ct)); | |
226c0c0e | 1632 | if (helper) { |
226c0c0e | 1633 | err = -EAGAIN; |
0f5b3e85 | 1634 | goto err2; |
226c0c0e PNA |
1635 | } |
1636 | rcu_read_unlock(); | |
1637 | #endif | |
1638 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1639 | goto err1; |
226c0c0e PNA |
1640 | } else { |
1641 | struct nf_conn_help *help; | |
1642 | ||
1afc5679 | 1643 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
226c0c0e | 1644 | if (help == NULL) { |
226c0c0e | 1645 | err = -ENOMEM; |
0f5b3e85 | 1646 | goto err2; |
226c0c0e | 1647 | } |
ae243bee | 1648 | /* set private helper data if allowed. */ |
7be54ca4 | 1649 | if (helper->from_nlattr) |
ae243bee | 1650 | helper->from_nlattr(helpinfo, ct); |
226c0c0e PNA |
1651 | |
1652 | /* not in hash table yet so not strictly necessary */ | |
a9b3cd7f | 1653 | RCU_INIT_POINTER(help->helper, helper); |
226c0c0e PNA |
1654 | } |
1655 | } else { | |
1656 | /* try an implicit helper assignation */ | |
b2a15a60 | 1657 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1658 | if (err < 0) |
1659 | goto err2; | |
1575e7ea PNA |
1660 | } |
1661 | ||
a88e22ad PNA |
1662 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
1663 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1664 | if (err < 0) |
1665 | goto err2; | |
e6a7d3c0 PNA |
1666 | } |
1667 | ||
a88e22ad | 1668 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
a992ca2a | 1669 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
a88e22ad | 1670 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
c539f017 FW |
1671 | nf_ct_labels_ext_add(ct); |
1672 | ||
a88e22ad PNA |
1673 | /* we must add conntrack extensions before confirmation. */ |
1674 | ct->status |= IPS_CONFIRMED; | |
1675 | ||
1676 | if (cda[CTA_STATUS]) { | |
1677 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1678 | if (err < 0) |
1679 | goto err2; | |
bbb3357d | 1680 | } |
c1d10adb | 1681 | |
41d73ec0 PM |
1682 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1683 | err = ctnetlink_change_seq_adj(ct, cda); | |
0f5b3e85 PM |
1684 | if (err < 0) |
1685 | goto err2; | |
c969aa7d | 1686 | } |
c969aa7d | 1687 | |
e5fc9e7a | 1688 | memset(&ct->proto, 0, sizeof(ct->proto)); |
df6fb868 | 1689 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1690 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1691 | if (err < 0) |
1692 | goto err2; | |
c1d10adb PNA |
1693 | } |
1694 | ||
bcd1e830 | 1695 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1696 | if (cda[CTA_MARK]) |
77236b6e | 1697 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1698 | #endif |
1699 | ||
5faa1f4c | 1700 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1701 | if (cda[CTA_TUPLE_MASTER]) { |
1702 | struct nf_conntrack_tuple master; | |
1703 | struct nf_conntrack_tuple_hash *master_h; | |
1704 | struct nf_conn *master_ct; | |
1705 | ||
1706 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1707 | if (err < 0) | |
0f5b3e85 | 1708 | goto err2; |
7ec47496 | 1709 | |
ef00f89f | 1710 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
1711 | if (master_h == NULL) { |
1712 | err = -ENOENT; | |
0f5b3e85 | 1713 | goto err2; |
7ec47496 PNA |
1714 | } |
1715 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1716 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1717 | ct->master = master_ct; |
f2a89004 | 1718 | } |
315c34da PNA |
1719 | tstamp = nf_conn_tstamp_find(ct); |
1720 | if (tstamp) | |
1721 | tstamp->start = ktime_to_ns(ktime_get_real()); | |
5faa1f4c | 1722 | |
7d367e06 JK |
1723 | err = nf_conntrack_hash_check_insert(ct); |
1724 | if (err < 0) | |
1725 | goto err2; | |
1726 | ||
58a3c9bb | 1727 | rcu_read_unlock(); |
dafc741c | 1728 | |
f0a3c086 | 1729 | return ct; |
c1d10adb | 1730 | |
0f5b3e85 PM |
1731 | err2: |
1732 | rcu_read_unlock(); | |
1733 | err1: | |
c1d10adb | 1734 | nf_conntrack_free(ct); |
f0a3c086 | 1735 | return ERR_PTR(err); |
c1d10adb PNA |
1736 | } |
1737 | ||
601e68e1 YH |
1738 | static int |
1739 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1740 | const struct nlmsghdr *nlh, |
1741 | const struct nlattr * const cda[]) | |
c1d10adb | 1742 | { |
9592a5c0 | 1743 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1744 | struct nf_conntrack_tuple otuple, rtuple; |
1745 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1746 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
7d367e06 | 1747 | struct nf_conn *ct; |
c1d10adb | 1748 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1749 | u16 zone; |
1750 | int err; | |
1751 | ||
1752 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1753 | if (err < 0) | |
1754 | return err; | |
c1d10adb | 1755 | |
df6fb868 | 1756 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1757 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1758 | if (err < 0) | |
1759 | return err; | |
1760 | } | |
1761 | ||
df6fb868 | 1762 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1763 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1764 | if (err < 0) | |
1765 | return err; | |
1766 | } | |
1767 | ||
df6fb868 | 1768 | if (cda[CTA_TUPLE_ORIG]) |
7d367e06 | 1769 | h = nf_conntrack_find_get(net, zone, &otuple); |
df6fb868 | 1770 | else if (cda[CTA_TUPLE_REPLY]) |
7d367e06 | 1771 | h = nf_conntrack_find_get(net, zone, &rtuple); |
c1d10adb PNA |
1772 | |
1773 | if (h == NULL) { | |
c1d10adb | 1774 | err = -ENOENT; |
f0a3c086 | 1775 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
fecc1133 | 1776 | enum ip_conntrack_events events; |
5faa1f4c | 1777 | |
442fad94 FW |
1778 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
1779 | return -EINVAL; | |
1780 | ||
ef00f89f | 1781 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
f0a3c086 | 1782 | &rtuple, u3); |
7d367e06 JK |
1783 | if (IS_ERR(ct)) |
1784 | return PTR_ERR(ct); | |
1785 | ||
f0a3c086 | 1786 | err = 0; |
fecc1133 PNA |
1787 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1788 | events = IPCT_RELATED; | |
1789 | else | |
1790 | events = IPCT_NEW; | |
1791 | ||
9b21f6a9 FW |
1792 | if (cda[CTA_LABELS] && |
1793 | ctnetlink_attach_labels(ct, cda) == 0) | |
1794 | events |= (1 << IPCT_LABEL); | |
1795 | ||
858b3133 PM |
1796 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1797 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1798 | (1 << IPCT_HELPER) | |
1799 | (1 << IPCT_PROTOINFO) | | |
41d73ec0 | 1800 | (1 << IPCT_SEQADJ) | |
a0891aa6 | 1801 | (1 << IPCT_MARK) | events, |
15e47304 | 1802 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 1803 | nlmsg_report(nlh)); |
f0a3c086 | 1804 | nf_ct_put(ct); |
7d367e06 | 1805 | } |
5faa1f4c | 1806 | |
c1d10adb PNA |
1807 | return err; |
1808 | } | |
1809 | /* implicit 'else' */ | |
1810 | ||
c1d10adb | 1811 | err = -EEXIST; |
7d367e06 | 1812 | ct = nf_ct_tuplehash_to_ctrack(h); |
ff4ca827 | 1813 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
7d367e06 | 1814 | spin_lock_bh(&nf_conntrack_lock); |
19abb7b0 | 1815 | err = ctnetlink_change_conntrack(ct, cda); |
7d367e06 | 1816 | spin_unlock_bh(&nf_conntrack_lock); |
19abb7b0 | 1817 | if (err == 0) { |
858b3133 PM |
1818 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1819 | (1 << IPCT_ASSURED) | | |
a0891aa6 | 1820 | (1 << IPCT_HELPER) | |
797a7d66 | 1821 | (1 << IPCT_LABEL) | |
a0891aa6 | 1822 | (1 << IPCT_PROTOINFO) | |
41d73ec0 | 1823 | (1 << IPCT_SEQADJ) | |
a0891aa6 | 1824 | (1 << IPCT_MARK), |
15e47304 | 1825 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 1826 | nlmsg_report(nlh)); |
7d367e06 | 1827 | } |
ff4ca827 | 1828 | } |
c1d10adb | 1829 | |
7d367e06 | 1830 | nf_ct_put(ct); |
c1d10adb PNA |
1831 | return err; |
1832 | } | |
1833 | ||
392025f8 | 1834 | static int |
15e47304 | 1835 | ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
392025f8 PNA |
1836 | __u16 cpu, const struct ip_conntrack_stat *st) |
1837 | { | |
1838 | struct nlmsghdr *nlh; | |
1839 | struct nfgenmsg *nfmsg; | |
15e47304 | 1840 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
1841 | |
1842 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU); | |
15e47304 | 1843 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
1844 | if (nlh == NULL) |
1845 | goto nlmsg_failure; | |
1846 | ||
1847 | nfmsg = nlmsg_data(nlh); | |
1848 | nfmsg->nfgen_family = AF_UNSPEC; | |
1849 | nfmsg->version = NFNETLINK_V0; | |
1850 | nfmsg->res_id = htons(cpu); | |
1851 | ||
1852 | if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) || | |
1853 | nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || | |
1854 | nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) || | |
1855 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || | |
1856 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || | |
1857 | nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) || | |
1858 | nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) || | |
1859 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || | |
1860 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, | |
1861 | htonl(st->insert_failed)) || | |
1862 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || | |
1863 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || | |
1864 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || | |
1865 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, | |
1866 | htonl(st->search_restart))) | |
1867 | goto nla_put_failure; | |
1868 | ||
1869 | nlmsg_end(skb, nlh); | |
1870 | return skb->len; | |
1871 | ||
1872 | nla_put_failure: | |
1873 | nlmsg_failure: | |
1874 | nlmsg_cancel(skb, nlh); | |
1875 | return -1; | |
1876 | } | |
1877 | ||
1878 | static int | |
1879 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1880 | { | |
1881 | int cpu; | |
1882 | struct net *net = sock_net(skb->sk); | |
1883 | ||
1884 | if (cb->args[0] == nr_cpu_ids) | |
1885 | return 0; | |
1886 | ||
1887 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
1888 | const struct ip_conntrack_stat *st; | |
1889 | ||
1890 | if (!cpu_possible(cpu)) | |
1891 | continue; | |
1892 | ||
1893 | st = per_cpu_ptr(net->ct.stat, cpu); | |
1894 | if (ctnetlink_ct_stat_cpu_fill_info(skb, | |
15e47304 | 1895 | NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
1896 | cb->nlh->nlmsg_seq, |
1897 | cpu, st) < 0) | |
1898 | break; | |
1899 | } | |
1900 | cb->args[0] = cpu; | |
1901 | ||
1902 | return skb->len; | |
1903 | } | |
1904 | ||
1905 | static int | |
1906 | ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb, | |
1907 | const struct nlmsghdr *nlh, | |
1908 | const struct nlattr * const cda[]) | |
1909 | { | |
1910 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1911 | struct netlink_dump_control c = { | |
1912 | .dump = ctnetlink_ct_stat_cpu_dump, | |
1913 | }; | |
1914 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1915 | } | |
1916 | ||
1917 | return 0; | |
1918 | } | |
1919 | ||
1920 | static int | |
15e47304 | 1921 | ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
392025f8 PNA |
1922 | struct net *net) |
1923 | { | |
1924 | struct nlmsghdr *nlh; | |
1925 | struct nfgenmsg *nfmsg; | |
15e47304 | 1926 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
1927 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
1928 | ||
1929 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS); | |
15e47304 | 1930 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
1931 | if (nlh == NULL) |
1932 | goto nlmsg_failure; | |
1933 | ||
1934 | nfmsg = nlmsg_data(nlh); | |
1935 | nfmsg->nfgen_family = AF_UNSPEC; | |
1936 | nfmsg->version = NFNETLINK_V0; | |
1937 | nfmsg->res_id = 0; | |
1938 | ||
1939 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) | |
1940 | goto nla_put_failure; | |
1941 | ||
1942 | nlmsg_end(skb, nlh); | |
1943 | return skb->len; | |
1944 | ||
1945 | nla_put_failure: | |
1946 | nlmsg_failure: | |
1947 | nlmsg_cancel(skb, nlh); | |
1948 | return -1; | |
1949 | } | |
1950 | ||
1951 | static int | |
1952 | ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb, | |
1953 | const struct nlmsghdr *nlh, | |
1954 | const struct nlattr * const cda[]) | |
1955 | { | |
1956 | struct sk_buff *skb2; | |
1957 | int err; | |
1958 | ||
1959 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1960 | if (skb2 == NULL) | |
1961 | return -ENOMEM; | |
1962 | ||
15e47304 | 1963 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
392025f8 PNA |
1964 | nlh->nlmsg_seq, |
1965 | NFNL_MSG_TYPE(nlh->nlmsg_type), | |
1966 | sock_net(skb->sk)); | |
1967 | if (err <= 0) | |
1968 | goto free; | |
1969 | ||
15e47304 | 1970 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
392025f8 PNA |
1971 | if (err < 0) |
1972 | goto out; | |
1973 | ||
1974 | return 0; | |
1975 | ||
1976 | free: | |
1977 | kfree_skb(skb2); | |
1978 | out: | |
1979 | /* this avoids a loop in nfnetlink. */ | |
1980 | return err == -EAGAIN ? -ENOBUFS : err; | |
1981 | } | |
1982 | ||
bd077937 PNA |
1983 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1984 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, | |
1985 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
1986 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
1987 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1988 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
1989 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, | |
1990 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
1991 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, | |
1992 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, | |
1993 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, | |
1994 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, | |
1995 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, | |
1996 | }; | |
1997 | ||
1998 | static struct nf_conntrack_expect * | |
1999 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, | |
2000 | struct nf_conntrack_helper *helper, | |
2001 | struct nf_conntrack_tuple *tuple, | |
2002 | struct nf_conntrack_tuple *mask); | |
2003 | ||
7c622345 | 2004 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
9cb01766 PNA |
2005 | static size_t |
2006 | ctnetlink_nfqueue_build_size(const struct nf_conn *ct) | |
2007 | { | |
2008 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
2009 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
2010 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
2011 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
2012 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
2013 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
2014 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ | |
2015 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
2016 | + nla_total_size(0) /* CTA_HELP */ | |
2017 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
2018 | + ctnetlink_secctx_size(ct) | |
2019 | #ifdef CONFIG_NF_NAT_NEEDED | |
2020 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ | |
2021 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
2022 | #endif | |
2023 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2024 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ | |
2025 | #endif | |
2026 | + ctnetlink_proto_size(ct) | |
2027 | ; | |
2028 | } | |
2029 | ||
2030 | static int | |
2031 | ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct) | |
2032 | { | |
2033 | struct nlattr *nest_parms; | |
2034 | ||
2035 | rcu_read_lock(); | |
2036 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); | |
2037 | if (!nest_parms) | |
2038 | goto nla_put_failure; | |
2039 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) | |
2040 | goto nla_put_failure; | |
2041 | nla_nest_end(skb, nest_parms); | |
2042 | ||
2043 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); | |
2044 | if (!nest_parms) | |
2045 | goto nla_put_failure; | |
2046 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) | |
2047 | goto nla_put_failure; | |
2048 | nla_nest_end(skb, nest_parms); | |
2049 | ||
2050 | if (nf_ct_zone(ct)) { | |
2051 | if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) | |
2052 | goto nla_put_failure; | |
2053 | } | |
2054 | ||
2055 | if (ctnetlink_dump_id(skb, ct) < 0) | |
2056 | goto nla_put_failure; | |
2057 | ||
2058 | if (ctnetlink_dump_status(skb, ct) < 0) | |
2059 | goto nla_put_failure; | |
2060 | ||
2061 | if (ctnetlink_dump_timeout(skb, ct) < 0) | |
2062 | goto nla_put_failure; | |
2063 | ||
2064 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) | |
2065 | goto nla_put_failure; | |
2066 | ||
2067 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) | |
2068 | goto nla_put_failure; | |
2069 | ||
2070 | #ifdef CONFIG_NF_CONNTRACK_SECMARK | |
2071 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) | |
2072 | goto nla_put_failure; | |
2073 | #endif | |
2074 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) | |
2075 | goto nla_put_failure; | |
2076 | ||
2077 | if ((ct->status & IPS_SEQ_ADJUST) && | |
41d73ec0 | 2078 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
9cb01766 PNA |
2079 | goto nla_put_failure; |
2080 | ||
2081 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2082 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) | |
2083 | goto nla_put_failure; | |
2084 | #endif | |
0ceabd83 FW |
2085 | if (ctnetlink_dump_labels(skb, ct) < 0) |
2086 | goto nla_put_failure; | |
9cb01766 PNA |
2087 | rcu_read_unlock(); |
2088 | return 0; | |
2089 | ||
2090 | nla_put_failure: | |
2091 | rcu_read_unlock(); | |
2092 | return -ENOSPC; | |
2093 | } | |
2094 | ||
2095 | static int | |
2096 | ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) | |
2097 | { | |
2098 | int err; | |
2099 | ||
2100 | if (cda[CTA_TIMEOUT]) { | |
2101 | err = ctnetlink_change_timeout(ct, cda); | |
2102 | if (err < 0) | |
2103 | return err; | |
2104 | } | |
2105 | if (cda[CTA_STATUS]) { | |
2106 | err = ctnetlink_change_status(ct, cda); | |
2107 | if (err < 0) | |
2108 | return err; | |
2109 | } | |
2110 | if (cda[CTA_HELP]) { | |
2111 | err = ctnetlink_change_helper(ct, cda); | |
2112 | if (err < 0) | |
2113 | return err; | |
2114 | } | |
9b21f6a9 FW |
2115 | if (cda[CTA_LABELS]) { |
2116 | err = ctnetlink_attach_labels(ct, cda); | |
2117 | if (err < 0) | |
2118 | return err; | |
2119 | } | |
9cb01766 PNA |
2120 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
2121 | if (cda[CTA_MARK]) | |
2122 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); | |
2123 | #endif | |
2124 | return 0; | |
2125 | } | |
2126 | ||
2127 | static int | |
2128 | ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct) | |
2129 | { | |
2130 | struct nlattr *cda[CTA_MAX+1]; | |
68e035c9 | 2131 | int ret; |
9cb01766 | 2132 | |
130ffbc2 DB |
2133 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); |
2134 | if (ret < 0) | |
2135 | return ret; | |
9cb01766 | 2136 | |
68e035c9 PNA |
2137 | spin_lock_bh(&nf_conntrack_lock); |
2138 | ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct); | |
2139 | spin_unlock_bh(&nf_conntrack_lock); | |
2140 | ||
2141 | return ret; | |
9cb01766 PNA |
2142 | } |
2143 | ||
bd077937 PNA |
2144 | static int ctnetlink_nfqueue_exp_parse(const struct nlattr * const *cda, |
2145 | const struct nf_conn *ct, | |
2146 | struct nf_conntrack_tuple *tuple, | |
2147 | struct nf_conntrack_tuple *mask) | |
2148 | { | |
2149 | int err; | |
2150 | ||
2151 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, | |
2152 | nf_ct_l3num(ct)); | |
2153 | if (err < 0) | |
2154 | return err; | |
2155 | ||
2156 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, | |
2157 | nf_ct_l3num(ct)); | |
2158 | } | |
2159 | ||
2160 | static int | |
2161 | ctnetlink_nfqueue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, | |
2162 | u32 portid, u32 report) | |
2163 | { | |
2164 | struct nlattr *cda[CTA_EXPECT_MAX+1]; | |
2165 | struct nf_conntrack_tuple tuple, mask; | |
b7e092c0 | 2166 | struct nf_conntrack_helper *helper = NULL; |
bd077937 PNA |
2167 | struct nf_conntrack_expect *exp; |
2168 | int err; | |
2169 | ||
2170 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy); | |
2171 | if (err < 0) | |
2172 | return err; | |
2173 | ||
2174 | err = ctnetlink_nfqueue_exp_parse((const struct nlattr * const *)cda, | |
2175 | ct, &tuple, &mask); | |
2176 | if (err < 0) | |
2177 | return err; | |
2178 | ||
2179 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
2180 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
2181 | ||
2182 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), | |
2183 | nf_ct_protonum(ct)); | |
2184 | if (helper == NULL) | |
2185 | return -EOPNOTSUPP; | |
2186 | } | |
2187 | ||
2188 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, | |
2189 | helper, &tuple, &mask); | |
2190 | if (IS_ERR(exp)) | |
2191 | return PTR_ERR(exp); | |
2192 | ||
2193 | err = nf_ct_expect_related_report(exp, portid, report); | |
2194 | if (err < 0) { | |
2195 | nf_ct_expect_put(exp); | |
2196 | return err; | |
2197 | } | |
2198 | ||
2199 | return 0; | |
2200 | } | |
2201 | ||
9cb01766 PNA |
2202 | static struct nfq_ct_hook ctnetlink_nfqueue_hook = { |
2203 | .build_size = ctnetlink_nfqueue_build_size, | |
2204 | .build = ctnetlink_nfqueue_build, | |
2205 | .parse = ctnetlink_nfqueue_parse, | |
bd077937 | 2206 | .attach_expect = ctnetlink_nfqueue_attach_expect, |
41d73ec0 | 2207 | .seq_adjust = nf_ct_tcp_seqadj_set, |
9cb01766 | 2208 | }; |
7c622345 | 2209 | #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */ |
9cb01766 | 2210 | |
601e68e1 YH |
2211 | /*********************************************************************** |
2212 | * EXPECT | |
2213 | ***********************************************************************/ | |
c1d10adb PNA |
2214 | |
2215 | static inline int | |
2216 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
2217 | const struct nf_conntrack_tuple *tuple, | |
2218 | enum ctattr_expect type) | |
2219 | { | |
df6fb868 | 2220 | struct nlattr *nest_parms; |
601e68e1 | 2221 | |
df6fb868 PM |
2222 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
2223 | if (!nest_parms) | |
2224 | goto nla_put_failure; | |
c1d10adb | 2225 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
2226 | goto nla_put_failure; |
2227 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
2228 | |
2229 | return 0; | |
2230 | ||
df6fb868 | 2231 | nla_put_failure: |
c1d10adb | 2232 | return -1; |
601e68e1 | 2233 | } |
c1d10adb | 2234 | |
1cde6436 PNA |
2235 | static inline int |
2236 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
2237 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 2238 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
2239 | { |
2240 | int ret; | |
2241 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 2242 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 2243 | struct nf_conntrack_tuple m; |
df6fb868 | 2244 | struct nlattr *nest_parms; |
d4156e8c PM |
2245 | |
2246 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 2247 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
2248 | m.src.u.all = mask->src.u.all; |
2249 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 2250 | |
df6fb868 PM |
2251 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
2252 | if (!nest_parms) | |
2253 | goto nla_put_failure; | |
1cde6436 | 2254 | |
3b988ece | 2255 | rcu_read_lock(); |
528a3a6f | 2256 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 2257 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
3b988ece HS |
2258 | if (ret >= 0) { |
2259 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
2260 | tuple->dst.protonum); | |
d4156e8c | 2261 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
3b988ece HS |
2262 | } |
2263 | rcu_read_unlock(); | |
2264 | ||
1cde6436 | 2265 | if (unlikely(ret < 0)) |
df6fb868 | 2266 | goto nla_put_failure; |
1cde6436 | 2267 | |
df6fb868 | 2268 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
2269 | |
2270 | return 0; | |
2271 | ||
df6fb868 | 2272 | nla_put_failure: |
1cde6436 PNA |
2273 | return -1; |
2274 | } | |
2275 | ||
c7232c99 PM |
2276 | static const union nf_inet_addr any_addr; |
2277 | ||
bb5cf80e | 2278 | static int |
c1d10adb | 2279 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 2280 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2281 | { |
2282 | struct nf_conn *master = exp->master; | |
c1216382 | 2283 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
bc01befd | 2284 | struct nf_conn_help *help; |
076a0ca0 PNA |
2285 | #ifdef CONFIG_NF_NAT_NEEDED |
2286 | struct nlattr *nest_parms; | |
2287 | struct nf_conntrack_tuple nat_tuple = {}; | |
2288 | #endif | |
544d5c7d PNA |
2289 | struct nf_ct_helper_expectfn *expfn; |
2290 | ||
d978e5da PM |
2291 | if (timeout < 0) |
2292 | timeout = 0; | |
c1d10adb PNA |
2293 | |
2294 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 2295 | goto nla_put_failure; |
1cde6436 | 2296 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 2297 | goto nla_put_failure; |
c1d10adb PNA |
2298 | if (ctnetlink_exp_dump_tuple(skb, |
2299 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
2300 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 2301 | goto nla_put_failure; |
601e68e1 | 2302 | |
076a0ca0 | 2303 | #ifdef CONFIG_NF_NAT_NEEDED |
c7232c99 PM |
2304 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
2305 | exp->saved_proto.all) { | |
076a0ca0 PNA |
2306 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
2307 | if (!nest_parms) | |
2308 | goto nla_put_failure; | |
2309 | ||
cc1eb431 DM |
2310 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
2311 | goto nla_put_failure; | |
076a0ca0 PNA |
2312 | |
2313 | nat_tuple.src.l3num = nf_ct_l3num(master); | |
c7232c99 | 2314 | nat_tuple.src.u3 = exp->saved_addr; |
076a0ca0 PNA |
2315 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
2316 | nat_tuple.src.u = exp->saved_proto; | |
2317 | ||
2318 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, | |
2319 | CTA_EXPECT_NAT_TUPLE) < 0) | |
2320 | goto nla_put_failure; | |
2321 | nla_nest_end(skb, nest_parms); | |
2322 | } | |
2323 | #endif | |
cc1eb431 DM |
2324 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
2325 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || | |
2326 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || | |
2327 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) | |
2328 | goto nla_put_failure; | |
bc01befd PNA |
2329 | help = nfct_help(master); |
2330 | if (help) { | |
2331 | struct nf_conntrack_helper *helper; | |
2332 | ||
2333 | helper = rcu_dereference(help->helper); | |
cc1eb431 DM |
2334 | if (helper && |
2335 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) | |
2336 | goto nla_put_failure; | |
bc01befd | 2337 | } |
544d5c7d | 2338 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
cc1eb431 DM |
2339 | if (expfn != NULL && |
2340 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) | |
2341 | goto nla_put_failure; | |
c1d10adb PNA |
2342 | |
2343 | return 0; | |
601e68e1 | 2344 | |
df6fb868 | 2345 | nla_put_failure: |
c1d10adb PNA |
2346 | return -1; |
2347 | } | |
2348 | ||
2349 | static int | |
15e47304 | 2350 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
8b0a231d | 2351 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2352 | { |
2353 | struct nlmsghdr *nlh; | |
2354 | struct nfgenmsg *nfmsg; | |
15e47304 | 2355 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
2356 | |
2357 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
15e47304 | 2358 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2359 | if (nlh == NULL) |
2360 | goto nlmsg_failure; | |
c1d10adb | 2361 | |
96bcf938 | 2362 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2363 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2364 | nfmsg->version = NFNETLINK_V0; | |
2365 | nfmsg->res_id = 0; | |
2366 | ||
2367 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 2368 | goto nla_put_failure; |
c1d10adb | 2369 | |
96bcf938 | 2370 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
2371 | return skb->len; |
2372 | ||
2373 | nlmsg_failure: | |
df6fb868 | 2374 | nla_put_failure: |
96bcf938 | 2375 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
2376 | return -1; |
2377 | } | |
2378 | ||
2379 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
2380 | static int |
2381 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 2382 | { |
9592a5c0 AD |
2383 | struct nf_conntrack_expect *exp = item->exp; |
2384 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
2385 | struct nlmsghdr *nlh; |
2386 | struct nfgenmsg *nfmsg; | |
c1d10adb | 2387 | struct sk_buff *skb; |
ebbf41df | 2388 | unsigned int type, group; |
c1d10adb PNA |
2389 | int flags = 0; |
2390 | ||
ebbf41df PNA |
2391 | if (events & (1 << IPEXP_DESTROY)) { |
2392 | type = IPCTNL_MSG_EXP_DELETE; | |
2393 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; | |
2394 | } else if (events & (1 << IPEXP_NEW)) { | |
c1d10adb PNA |
2395 | type = IPCTNL_MSG_EXP_NEW; |
2396 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
ebbf41df | 2397 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
c1d10adb | 2398 | } else |
e34d5c1a | 2399 | return 0; |
c1d10adb | 2400 | |
ebbf41df | 2401 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
e34d5c1a | 2402 | return 0; |
b3a27bfb | 2403 | |
96bcf938 PNA |
2404 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
2405 | if (skb == NULL) | |
150ace0d | 2406 | goto errout; |
c1d10adb | 2407 | |
b633ad5f | 2408 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
15e47304 | 2409 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2410 | if (nlh == NULL) |
2411 | goto nlmsg_failure; | |
c1d10adb | 2412 | |
96bcf938 | 2413 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2414 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2415 | nfmsg->version = NFNETLINK_V0; | |
2416 | nfmsg->res_id = 0; | |
2417 | ||
528a3a6f | 2418 | rcu_read_lock(); |
c1d10adb | 2419 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 2420 | goto nla_put_failure; |
528a3a6f | 2421 | rcu_read_unlock(); |
c1d10adb | 2422 | |
96bcf938 | 2423 | nlmsg_end(skb, nlh); |
15e47304 | 2424 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
e34d5c1a | 2425 | return 0; |
c1d10adb | 2426 | |
df6fb868 | 2427 | nla_put_failure: |
528a3a6f | 2428 | rcu_read_unlock(); |
96bcf938 | 2429 | nlmsg_cancel(skb, nlh); |
528a3a6f | 2430 | nlmsg_failure: |
c1d10adb | 2431 | kfree_skb(skb); |
150ace0d | 2432 | errout: |
9592a5c0 | 2433 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 2434 | return 0; |
c1d10adb PNA |
2435 | } |
2436 | #endif | |
cf6994c2 PM |
2437 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
2438 | { | |
31f15875 PM |
2439 | if (cb->args[1]) |
2440 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
2441 | return 0; |
2442 | } | |
c1d10adb PNA |
2443 | |
2444 | static int | |
2445 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2446 | { | |
9592a5c0 | 2447 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 2448 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 2449 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 2450 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 2451 | |
7d0742da | 2452 | rcu_read_lock(); |
31f15875 PM |
2453 | last = (struct nf_conntrack_expect *)cb->args[1]; |
2454 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 2455 | restart: |
b67bfe0d | 2456 | hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
2457 | hnode) { |
2458 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 2459 | continue; |
31f15875 PM |
2460 | if (cb->args[1]) { |
2461 | if (exp != last) | |
2462 | continue; | |
2463 | cb->args[1] = 0; | |
2464 | } | |
8b0a231d | 2465 | if (ctnetlink_exp_fill_info(skb, |
15e47304 | 2466 | NETLINK_CB(cb->skb).portid, |
31f15875 PM |
2467 | cb->nlh->nlmsg_seq, |
2468 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 2469 | exp) < 0) { |
7d0742da PM |
2470 | if (!atomic_inc_not_zero(&exp->use)) |
2471 | continue; | |
31f15875 PM |
2472 | cb->args[1] = (unsigned long)exp; |
2473 | goto out; | |
2474 | } | |
cf6994c2 | 2475 | } |
31f15875 PM |
2476 | if (cb->args[1]) { |
2477 | cb->args[1] = 0; | |
2478 | goto restart; | |
cf6994c2 PM |
2479 | } |
2480 | } | |
601e68e1 | 2481 | out: |
7d0742da | 2482 | rcu_read_unlock(); |
cf6994c2 PM |
2483 | if (last) |
2484 | nf_ct_expect_put(last); | |
c1d10adb | 2485 | |
c1d10adb PNA |
2486 | return skb->len; |
2487 | } | |
2488 | ||
e844a928 PNA |
2489 | static int |
2490 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2491 | { | |
2492 | struct nf_conntrack_expect *exp, *last; | |
2493 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
2494 | struct nf_conn *ct = cb->data; | |
2495 | struct nf_conn_help *help = nfct_help(ct); | |
2496 | u_int8_t l3proto = nfmsg->nfgen_family; | |
2497 | ||
2498 | if (cb->args[0]) | |
2499 | return 0; | |
2500 | ||
2501 | rcu_read_lock(); | |
2502 | last = (struct nf_conntrack_expect *)cb->args[1]; | |
2503 | restart: | |
2504 | hlist_for_each_entry(exp, &help->expectations, lnode) { | |
2505 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
2506 | continue; | |
2507 | if (cb->args[1]) { | |
2508 | if (exp != last) | |
2509 | continue; | |
2510 | cb->args[1] = 0; | |
2511 | } | |
2512 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
2513 | cb->nlh->nlmsg_seq, | |
2514 | IPCTNL_MSG_EXP_NEW, | |
2515 | exp) < 0) { | |
2516 | if (!atomic_inc_not_zero(&exp->use)) | |
2517 | continue; | |
2518 | cb->args[1] = (unsigned long)exp; | |
2519 | goto out; | |
2520 | } | |
2521 | } | |
2522 | if (cb->args[1]) { | |
2523 | cb->args[1] = 0; | |
2524 | goto restart; | |
2525 | } | |
2526 | cb->args[0] = 1; | |
2527 | out: | |
2528 | rcu_read_unlock(); | |
2529 | if (last) | |
2530 | nf_ct_expect_put(last); | |
2531 | ||
2532 | return skb->len; | |
2533 | } | |
2534 | ||
2535 | static int ctnetlink_dump_exp_ct(struct sock *ctnl, struct sk_buff *skb, | |
2536 | const struct nlmsghdr *nlh, | |
2537 | const struct nlattr * const cda[]) | |
2538 | { | |
2539 | int err; | |
2540 | struct net *net = sock_net(ctnl); | |
2541 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
2542 | u_int8_t u3 = nfmsg->nfgen_family; | |
2543 | struct nf_conntrack_tuple tuple; | |
2544 | struct nf_conntrack_tuple_hash *h; | |
2545 | struct nf_conn *ct; | |
2546 | u16 zone = 0; | |
2547 | struct netlink_dump_control c = { | |
2548 | .dump = ctnetlink_exp_ct_dump_table, | |
2549 | .done = ctnetlink_exp_done, | |
2550 | }; | |
2551 | ||
2552 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); | |
2553 | if (err < 0) | |
2554 | return err; | |
2555 | ||
2556 | if (cda[CTA_EXPECT_ZONE]) { | |
2557 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); | |
2558 | if (err < 0) | |
2559 | return err; | |
2560 | } | |
2561 | ||
2562 | h = nf_conntrack_find_get(net, zone, &tuple); | |
2563 | if (!h) | |
2564 | return -ENOENT; | |
2565 | ||
2566 | ct = nf_ct_tuplehash_to_ctrack(h); | |
2567 | c.data = ct; | |
2568 | ||
2569 | err = netlink_dump_start(ctnl, skb, nlh, &c); | |
2570 | nf_ct_put(ct); | |
2571 | ||
2572 | return err; | |
2573 | } | |
2574 | ||
c1d10adb | 2575 | static int |
601e68e1 | 2576 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
2577 | const struct nlmsghdr *nlh, |
2578 | const struct nlattr * const cda[]) | |
c1d10adb | 2579 | { |
9592a5c0 | 2580 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
2581 | struct nf_conntrack_tuple tuple; |
2582 | struct nf_conntrack_expect *exp; | |
2583 | struct sk_buff *skb2; | |
96bcf938 | 2584 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2585 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
2586 | u16 zone; |
2587 | int err; | |
c1d10adb | 2588 | |
b8f3ab42 | 2589 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
e844a928 PNA |
2590 | if (cda[CTA_EXPECT_MASTER]) |
2591 | return ctnetlink_dump_exp_ct(ctnl, skb, nlh, cda); | |
2592 | else { | |
2593 | struct netlink_dump_control c = { | |
2594 | .dump = ctnetlink_exp_dump_table, | |
2595 | .done = ctnetlink_exp_done, | |
2596 | }; | |
2597 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2598 | } | |
c1d10adb PNA |
2599 | } |
2600 | ||
ef00f89f PM |
2601 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2602 | if (err < 0) | |
2603 | return err; | |
2604 | ||
35dba1d7 PNA |
2605 | if (cda[CTA_EXPECT_TUPLE]) |
2606 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
2607 | else if (cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
2608 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
2609 | else | |
2610 | return -EINVAL; | |
2611 | ||
2612 | if (err < 0) | |
2613 | return err; | |
2614 | ||
ef00f89f | 2615 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
2616 | if (!exp) |
2617 | return -ENOENT; | |
2618 | ||
df6fb868 | 2619 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 2620 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 2621 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 2622 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2623 | return -ENOENT; |
2624 | } | |
601e68e1 | 2625 | } |
c1d10adb PNA |
2626 | |
2627 | err = -ENOMEM; | |
96bcf938 | 2628 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
81378f72 PNA |
2629 | if (skb2 == NULL) { |
2630 | nf_ct_expect_put(exp); | |
c1d10adb | 2631 | goto out; |
81378f72 | 2632 | } |
4e9b8269 | 2633 | |
528a3a6f | 2634 | rcu_read_lock(); |
15e47304 | 2635 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
8b0a231d | 2636 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 2637 | rcu_read_unlock(); |
81378f72 | 2638 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2639 | if (err <= 0) |
2640 | goto free; | |
2641 | ||
15e47304 | 2642 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
81378f72 PNA |
2643 | if (err < 0) |
2644 | goto out; | |
c1d10adb | 2645 | |
81378f72 | 2646 | return 0; |
c1d10adb PNA |
2647 | |
2648 | free: | |
2649 | kfree_skb(skb2); | |
2650 | out: | |
81378f72 PNA |
2651 | /* this avoids a loop in nfnetlink. */ |
2652 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
2653 | } |
2654 | ||
2655 | static int | |
601e68e1 | 2656 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
2657 | const struct nlmsghdr *nlh, |
2658 | const struct nlattr * const cda[]) | |
c1d10adb | 2659 | { |
9592a5c0 | 2660 | struct net *net = sock_net(ctnl); |
31f15875 | 2661 | struct nf_conntrack_expect *exp; |
c1d10adb | 2662 | struct nf_conntrack_tuple tuple; |
96bcf938 | 2663 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
b67bfe0d | 2664 | struct hlist_node *next; |
c1d10adb | 2665 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 2666 | unsigned int i; |
ef00f89f | 2667 | u16 zone; |
c1d10adb PNA |
2668 | int err; |
2669 | ||
df6fb868 | 2670 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 2671 | /* delete a single expect by tuple */ |
ef00f89f PM |
2672 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2673 | if (err < 0) | |
2674 | return err; | |
2675 | ||
c1d10adb PNA |
2676 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
2677 | if (err < 0) | |
2678 | return err; | |
2679 | ||
2680 | /* bump usage count to 2 */ | |
ef00f89f | 2681 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
2682 | if (!exp) |
2683 | return -ENOENT; | |
2684 | ||
df6fb868 | 2685 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 2686 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 2687 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 2688 | nf_ct_expect_put(exp); |
c1d10adb PNA |
2689 | return -ENOENT; |
2690 | } | |
2691 | } | |
2692 | ||
2693 | /* after list removal, usage count == 1 */ | |
ebbf41df PNA |
2694 | spin_lock_bh(&nf_conntrack_lock); |
2695 | if (del_timer(&exp->timeout)) { | |
15e47304 | 2696 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
ebbf41df PNA |
2697 | nlmsg_report(nlh)); |
2698 | nf_ct_expect_put(exp); | |
2699 | } | |
2700 | spin_unlock_bh(&nf_conntrack_lock); | |
601e68e1 | 2701 | /* have to put what we 'get' above. |
c1d10adb | 2702 | * after this line usage count == 0 */ |
6823645d | 2703 | nf_ct_expect_put(exp); |
df6fb868 PM |
2704 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
2705 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 2706 | struct nf_conn_help *m_help; |
c1d10adb PNA |
2707 | |
2708 | /* delete all expectations for this helper */ | |
f8ba1aff | 2709 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 | 2710 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
b67bfe0d | 2711 | hlist_for_each_entry_safe(exp, next, |
9592a5c0 | 2712 | &net->ct.expect_hash[i], |
31f15875 PM |
2713 | hnode) { |
2714 | m_help = nfct_help(exp->master); | |
794e6871 PM |
2715 | if (!strcmp(m_help->helper->name, name) && |
2716 | del_timer(&exp->timeout)) { | |
ebbf41df | 2717 | nf_ct_unlink_expect_report(exp, |
15e47304 | 2718 | NETLINK_CB(skb).portid, |
ebbf41df | 2719 | nlmsg_report(nlh)); |
31f15875 PM |
2720 | nf_ct_expect_put(exp); |
2721 | } | |
c1d10adb PNA |
2722 | } |
2723 | } | |
f8ba1aff | 2724 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
2725 | } else { |
2726 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 2727 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 | 2728 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
b67bfe0d | 2729 | hlist_for_each_entry_safe(exp, next, |
9592a5c0 | 2730 | &net->ct.expect_hash[i], |
31f15875 PM |
2731 | hnode) { |
2732 | if (del_timer(&exp->timeout)) { | |
ebbf41df | 2733 | nf_ct_unlink_expect_report(exp, |
15e47304 | 2734 | NETLINK_CB(skb).portid, |
ebbf41df | 2735 | nlmsg_report(nlh)); |
31f15875 PM |
2736 | nf_ct_expect_put(exp); |
2737 | } | |
c1d10adb PNA |
2738 | } |
2739 | } | |
f8ba1aff | 2740 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
2741 | } |
2742 | ||
2743 | return 0; | |
2744 | } | |
2745 | static int | |
39938324 PM |
2746 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
2747 | const struct nlattr * const cda[]) | |
c1d10adb | 2748 | { |
9768e1ac KW |
2749 | if (cda[CTA_EXPECT_TIMEOUT]) { |
2750 | if (!del_timer(&x->timeout)) | |
2751 | return -ETIME; | |
2752 | ||
2753 | x->timeout.expires = jiffies + | |
2754 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
2755 | add_timer(&x->timeout); | |
2756 | } | |
2757 | return 0; | |
c1d10adb PNA |
2758 | } |
2759 | ||
076a0ca0 PNA |
2760 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
2761 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, | |
2762 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, | |
2763 | }; | |
2764 | ||
2765 | static int | |
2766 | ctnetlink_parse_expect_nat(const struct nlattr *attr, | |
2767 | struct nf_conntrack_expect *exp, | |
2768 | u_int8_t u3) | |
2769 | { | |
2770 | #ifdef CONFIG_NF_NAT_NEEDED | |
2771 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; | |
2772 | struct nf_conntrack_tuple nat_tuple = {}; | |
2773 | int err; | |
2774 | ||
130ffbc2 DB |
2775 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy); |
2776 | if (err < 0) | |
2777 | return err; | |
076a0ca0 PNA |
2778 | |
2779 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) | |
2780 | return -EINVAL; | |
2781 | ||
2782 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, | |
2783 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3); | |
2784 | if (err < 0) | |
2785 | return err; | |
2786 | ||
c7232c99 | 2787 | exp->saved_addr = nat_tuple.src.u3; |
076a0ca0 PNA |
2788 | exp->saved_proto = nat_tuple.src.u; |
2789 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); | |
2790 | ||
2791 | return 0; | |
2792 | #else | |
2793 | return -EOPNOTSUPP; | |
2794 | #endif | |
2795 | } | |
2796 | ||
0ef71ee1 PNA |
2797 | static struct nf_conntrack_expect * |
2798 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, | |
2799 | struct nf_conntrack_helper *helper, | |
2800 | struct nf_conntrack_tuple *tuple, | |
2801 | struct nf_conntrack_tuple *mask) | |
c1d10adb | 2802 | { |
0ef71ee1 | 2803 | u_int32_t class = 0; |
c1d10adb | 2804 | struct nf_conntrack_expect *exp; |
dc808fe2 | 2805 | struct nf_conn_help *help; |
0ef71ee1 | 2806 | int err; |
660fdb2a | 2807 | |
b8c5e52c PNA |
2808 | if (cda[CTA_EXPECT_CLASS] && helper) { |
2809 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); | |
0ef71ee1 PNA |
2810 | if (class > helper->expect_class_max) |
2811 | return ERR_PTR(-EINVAL); | |
b8c5e52c | 2812 | } |
6823645d | 2813 | exp = nf_ct_expect_alloc(ct); |
0ef71ee1 PNA |
2814 | if (!exp) |
2815 | return ERR_PTR(-ENOMEM); | |
2816 | ||
bc01befd PNA |
2817 | help = nfct_help(ct); |
2818 | if (!help) { | |
2819 | if (!cda[CTA_EXPECT_TIMEOUT]) { | |
2820 | err = -EINVAL; | |
1310b955 | 2821 | goto err_out; |
bc01befd PNA |
2822 | } |
2823 | exp->timeout.expires = | |
2824 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
601e68e1 | 2825 | |
bc01befd PNA |
2826 | exp->flags = NF_CT_EXPECT_USERSPACE; |
2827 | if (cda[CTA_EXPECT_FLAGS]) { | |
2828 | exp->flags |= | |
2829 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
2830 | } | |
2831 | } else { | |
2832 | if (cda[CTA_EXPECT_FLAGS]) { | |
2833 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
2834 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; | |
2835 | } else | |
2836 | exp->flags = 0; | |
2837 | } | |
544d5c7d PNA |
2838 | if (cda[CTA_EXPECT_FN]) { |
2839 | const char *name = nla_data(cda[CTA_EXPECT_FN]); | |
2840 | struct nf_ct_helper_expectfn *expfn; | |
2841 | ||
2842 | expfn = nf_ct_helper_expectfn_find_by_name(name); | |
2843 | if (expfn == NULL) { | |
2844 | err = -EINVAL; | |
2845 | goto err_out; | |
2846 | } | |
2847 | exp->expectfn = expfn->expectfn; | |
2848 | } else | |
2849 | exp->expectfn = NULL; | |
601e68e1 | 2850 | |
b8c5e52c | 2851 | exp->class = class; |
c1d10adb | 2852 | exp->master = ct; |
660fdb2a | 2853 | exp->helper = helper; |
0ef71ee1 PNA |
2854 | exp->tuple = *tuple; |
2855 | exp->mask.src.u3 = mask->src.u3; | |
2856 | exp->mask.src.u.all = mask->src.u.all; | |
c1d10adb | 2857 | |
076a0ca0 PNA |
2858 | if (cda[CTA_EXPECT_NAT]) { |
2859 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], | |
0ef71ee1 | 2860 | exp, nf_ct_l3num(ct)); |
076a0ca0 PNA |
2861 | if (err < 0) |
2862 | goto err_out; | |
2863 | } | |
0ef71ee1 | 2864 | return exp; |
076a0ca0 | 2865 | err_out: |
6823645d | 2866 | nf_ct_expect_put(exp); |
0ef71ee1 PNA |
2867 | return ERR_PTR(err); |
2868 | } | |
2869 | ||
2870 | static int | |
2871 | ctnetlink_create_expect(struct net *net, u16 zone, | |
2872 | const struct nlattr * const cda[], | |
2873 | u_int8_t u3, u32 portid, int report) | |
2874 | { | |
2875 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
2876 | struct nf_conntrack_tuple_hash *h = NULL; | |
2877 | struct nf_conntrack_helper *helper = NULL; | |
2878 | struct nf_conntrack_expect *exp; | |
2879 | struct nf_conn *ct; | |
2880 | int err; | |
2881 | ||
2882 | /* caller guarantees that those three CTA_EXPECT_* exist */ | |
2883 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
2884 | if (err < 0) | |
2885 | return err; | |
2886 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
2887 | if (err < 0) | |
2888 | return err; | |
2889 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
2890 | if (err < 0) | |
2891 | return err; | |
2892 | ||
2893 | /* Look for master conntrack of this expectation */ | |
2894 | h = nf_conntrack_find_get(net, zone, &master_tuple); | |
2895 | if (!h) | |
2896 | return -ENOENT; | |
2897 | ct = nf_ct_tuplehash_to_ctrack(h); | |
2898 | ||
2899 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
2900 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
2901 | ||
2902 | helper = __nf_conntrack_helper_find(helpname, u3, | |
2903 | nf_ct_protonum(ct)); | |
2904 | if (helper == NULL) { | |
2905 | #ifdef CONFIG_MODULES | |
2906 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
2907 | err = -EOPNOTSUPP; | |
2908 | goto err_ct; | |
2909 | } | |
2910 | helper = __nf_conntrack_helper_find(helpname, u3, | |
2911 | nf_ct_protonum(ct)); | |
2912 | if (helper) { | |
2913 | err = -EAGAIN; | |
2914 | goto err_ct; | |
2915 | } | |
2916 | #endif | |
2917 | err = -EOPNOTSUPP; | |
2918 | goto err_ct; | |
2919 | } | |
2920 | } | |
2921 | ||
2922 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); | |
2923 | if (IS_ERR(exp)) { | |
2924 | err = PTR_ERR(exp); | |
2925 | goto err_ct; | |
2926 | } | |
2927 | ||
2928 | err = nf_ct_expect_related_report(exp, portid, report); | |
2929 | if (err < 0) | |
2930 | goto err_exp; | |
2931 | ||
2932 | return 0; | |
2933 | err_exp: | |
2934 | nf_ct_expect_put(exp); | |
2935 | err_ct: | |
2936 | nf_ct_put(ct); | |
c1d10adb PNA |
2937 | return err; |
2938 | } | |
2939 | ||
2940 | static int | |
2941 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
2942 | const struct nlmsghdr *nlh, |
2943 | const struct nlattr * const cda[]) | |
c1d10adb | 2944 | { |
9592a5c0 | 2945 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
2946 | struct nf_conntrack_tuple tuple; |
2947 | struct nf_conntrack_expect *exp; | |
96bcf938 | 2948 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2949 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
2950 | u16 zone; |
2951 | int err; | |
c1d10adb | 2952 | |
df6fb868 PM |
2953 | if (!cda[CTA_EXPECT_TUPLE] |
2954 | || !cda[CTA_EXPECT_MASK] | |
2955 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
2956 | return -EINVAL; |
2957 | ||
ef00f89f PM |
2958 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2959 | if (err < 0) | |
2960 | return err; | |
2961 | ||
c1d10adb PNA |
2962 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
2963 | if (err < 0) | |
2964 | return err; | |
2965 | ||
f8ba1aff | 2966 | spin_lock_bh(&nf_conntrack_lock); |
ef00f89f | 2967 | exp = __nf_ct_expect_find(net, zone, &tuple); |
c1d10adb PNA |
2968 | |
2969 | if (!exp) { | |
f8ba1aff | 2970 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 2971 | err = -ENOENT; |
19abb7b0 | 2972 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
ef00f89f | 2973 | err = ctnetlink_create_expect(net, zone, cda, |
19abb7b0 | 2974 | u3, |
15e47304 | 2975 | NETLINK_CB(skb).portid, |
19abb7b0 PNA |
2976 | nlmsg_report(nlh)); |
2977 | } | |
c1d10adb PNA |
2978 | return err; |
2979 | } | |
2980 | ||
2981 | err = -EEXIST; | |
2982 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
2983 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 2984 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 2985 | |
c1d10adb PNA |
2986 | return err; |
2987 | } | |
2988 | ||
392025f8 | 2989 | static int |
15e47304 | 2990 | ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu, |
392025f8 PNA |
2991 | const struct ip_conntrack_stat *st) |
2992 | { | |
2993 | struct nlmsghdr *nlh; | |
2994 | struct nfgenmsg *nfmsg; | |
15e47304 | 2995 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
2996 | |
2997 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU); | |
15e47304 | 2998 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
2999 | if (nlh == NULL) |
3000 | goto nlmsg_failure; | |
3001 | ||
3002 | nfmsg = nlmsg_data(nlh); | |
3003 | nfmsg->nfgen_family = AF_UNSPEC; | |
3004 | nfmsg->version = NFNETLINK_V0; | |
3005 | nfmsg->res_id = htons(cpu); | |
3006 | ||
3007 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || | |
3008 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || | |
3009 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) | |
3010 | goto nla_put_failure; | |
3011 | ||
3012 | nlmsg_end(skb, nlh); | |
3013 | return skb->len; | |
3014 | ||
3015 | nla_put_failure: | |
3016 | nlmsg_failure: | |
3017 | nlmsg_cancel(skb, nlh); | |
3018 | return -1; | |
3019 | } | |
3020 | ||
3021 | static int | |
3022 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3023 | { | |
3024 | int cpu; | |
3025 | struct net *net = sock_net(skb->sk); | |
3026 | ||
3027 | if (cb->args[0] == nr_cpu_ids) | |
3028 | return 0; | |
3029 | ||
3030 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
3031 | const struct ip_conntrack_stat *st; | |
3032 | ||
3033 | if (!cpu_possible(cpu)) | |
3034 | continue; | |
3035 | ||
3036 | st = per_cpu_ptr(net->ct.stat, cpu); | |
15e47304 | 3037 | if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
3038 | cb->nlh->nlmsg_seq, |
3039 | cpu, st) < 0) | |
3040 | break; | |
3041 | } | |
3042 | cb->args[0] = cpu; | |
3043 | ||
3044 | return skb->len; | |
3045 | } | |
3046 | ||
3047 | static int | |
3048 | ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb, | |
3049 | const struct nlmsghdr *nlh, | |
3050 | const struct nlattr * const cda[]) | |
3051 | { | |
3052 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
3053 | struct netlink_dump_control c = { | |
3054 | .dump = ctnetlink_exp_stat_cpu_dump, | |
3055 | }; | |
3056 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
3057 | } | |
3058 | ||
3059 | return 0; | |
3060 | } | |
3061 | ||
c1d10adb | 3062 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
e34d5c1a PNA |
3063 | static struct nf_ct_event_notifier ctnl_notifier = { |
3064 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
3065 | }; |
3066 | ||
e34d5c1a PNA |
3067 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
3068 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
3069 | }; |
3070 | #endif | |
3071 | ||
7c8d4cb4 | 3072 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 3073 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
3074 | .attr_count = CTA_MAX, |
3075 | .policy = ct_nla_policy }, | |
c1d10adb | 3076 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3077 | .attr_count = CTA_MAX, |
3078 | .policy = ct_nla_policy }, | |
c1d10adb | 3079 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
3080 | .attr_count = CTA_MAX, |
3081 | .policy = ct_nla_policy }, | |
c1d10adb | 3082 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3083 | .attr_count = CTA_MAX, |
3084 | .policy = ct_nla_policy }, | |
392025f8 PNA |
3085 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
3086 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, | |
d871befe PNA |
3087 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
3088 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, | |
c1d10adb PNA |
3089 | }; |
3090 | ||
7c8d4cb4 | 3091 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 3092 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
3093 | .attr_count = CTA_EXPECT_MAX, |
3094 | .policy = exp_nla_policy }, | |
c1d10adb | 3095 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
3096 | .attr_count = CTA_EXPECT_MAX, |
3097 | .policy = exp_nla_policy }, | |
c1d10adb | 3098 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
3099 | .attr_count = CTA_EXPECT_MAX, |
3100 | .policy = exp_nla_policy }, | |
392025f8 | 3101 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
c1d10adb PNA |
3102 | }; |
3103 | ||
7c8d4cb4 | 3104 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
3105 | .name = "conntrack", |
3106 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
3107 | .cb_count = IPCTNL_MSG_MAX, | |
3108 | .cb = ctnl_cb, | |
3109 | }; | |
3110 | ||
7c8d4cb4 | 3111 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
3112 | .name = "conntrack_expect", |
3113 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
3114 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
3115 | .cb = ctnl_exp_cb, | |
3116 | }; | |
3117 | ||
d2483dde | 3118 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 3119 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 3120 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb | 3121 | |
70e9942f PNA |
3122 | static int __net_init ctnetlink_net_init(struct net *net) |
3123 | { | |
3124 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3125 | int ret; | |
3126 | ||
3127 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); | |
3128 | if (ret < 0) { | |
3129 | pr_err("ctnetlink_init: cannot register notifier.\n"); | |
3130 | goto err_out; | |
3131 | } | |
3132 | ||
3133 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); | |
3134 | if (ret < 0) { | |
3135 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); | |
3136 | goto err_unreg_notifier; | |
3137 | } | |
3138 | #endif | |
3139 | return 0; | |
3140 | ||
3141 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3142 | err_unreg_notifier: | |
3143 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3144 | err_out: | |
3145 | return ret; | |
3146 | #endif | |
3147 | } | |
3148 | ||
3149 | static void ctnetlink_net_exit(struct net *net) | |
3150 | { | |
3151 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3152 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); | |
3153 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3154 | #endif | |
3155 | } | |
3156 | ||
3157 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) | |
3158 | { | |
3159 | struct net *net; | |
3160 | ||
3161 | list_for_each_entry(net, net_exit_list, exit_list) | |
3162 | ctnetlink_net_exit(net); | |
3163 | } | |
3164 | ||
3165 | static struct pernet_operations ctnetlink_net_ops = { | |
3166 | .init = ctnetlink_net_init, | |
3167 | .exit_batch = ctnetlink_net_exit_batch, | |
3168 | }; | |
3169 | ||
c1d10adb PNA |
3170 | static int __init ctnetlink_init(void) |
3171 | { | |
3172 | int ret; | |
3173 | ||
654d0fbd | 3174 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
c1d10adb PNA |
3175 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
3176 | if (ret < 0) { | |
654d0fbd | 3177 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
c1d10adb PNA |
3178 | goto err_out; |
3179 | } | |
3180 | ||
3181 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
3182 | if (ret < 0) { | |
654d0fbd | 3183 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
c1d10adb PNA |
3184 | goto err_unreg_subsys; |
3185 | } | |
3186 | ||
ef6acf68 JL |
3187 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
3188 | if (ret < 0) { | |
70e9942f | 3189 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
c1d10adb PNA |
3190 | goto err_unreg_exp_subsys; |
3191 | } | |
7c622345 | 3192 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
9cb01766 PNA |
3193 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
3194 | RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook); | |
3195 | #endif | |
c1d10adb PNA |
3196 | return 0; |
3197 | ||
c1d10adb PNA |
3198 | err_unreg_exp_subsys: |
3199 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
c1d10adb PNA |
3200 | err_unreg_subsys: |
3201 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
3202 | err_out: | |
3203 | return ret; | |
3204 | } | |
3205 | ||
3206 | static void __exit ctnetlink_exit(void) | |
3207 | { | |
654d0fbd | 3208 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
c1d10adb | 3209 | |
70e9942f | 3210 | unregister_pernet_subsys(&ctnetlink_net_ops); |
c1d10adb PNA |
3211 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
3212 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
7c622345 | 3213 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
9cb01766 PNA |
3214 | RCU_INIT_POINTER(nfq_ct_hook, NULL); |
3215 | #endif | |
c1d10adb PNA |
3216 | } |
3217 | ||
3218 | module_init(ctnetlink_init); | |
3219 | module_exit(ctnetlink_exit); |