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Commit | Line | Data |
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c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
5faa1f4c | 7 | * (C) 2005-2007 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> | |
21 | #include <linux/types.h> | |
22 | #include <linux/timer.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/netlink.h> | |
26 | #include <linux/spinlock.h> | |
40a839fd | 27 | #include <linux/interrupt.h> |
c1d10adb PNA |
28 | #include <linux/notifier.h> |
29 | ||
30 | #include <linux/netfilter.h> | |
dc5fc579 | 31 | #include <net/netlink.h> |
c1d10adb PNA |
32 | #include <net/netfilter/nf_conntrack.h> |
33 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 34 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
35 | #include <net/netfilter/nf_conntrack_helper.h> |
36 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 37 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 JK |
38 | #include <net/netfilter/nf_conntrack_tuple.h> |
39 | #ifdef CONFIG_NF_NAT_NEEDED | |
40 | #include <net/netfilter/nf_nat_core.h> | |
41 | #include <net/netfilter/nf_nat_protocol.h> | |
42 | #endif | |
c1d10adb PNA |
43 | |
44 | #include <linux/netfilter/nfnetlink.h> | |
45 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
46 | ||
47 | MODULE_LICENSE("GPL"); | |
48 | ||
dc808fe2 | 49 | static char __initdata version[] = "0.93"; |
c1d10adb | 50 | |
c1d10adb | 51 | static inline int |
601e68e1 | 52 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 53 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 54 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 55 | { |
c1d10adb | 56 | int ret = 0; |
df6fb868 | 57 | struct nlattr *nest_parms; |
c1d10adb | 58 | |
df6fb868 PM |
59 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
60 | if (!nest_parms) | |
61 | goto nla_put_failure; | |
77236b6e | 62 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 63 | |
fdf70832 PM |
64 | if (likely(l4proto->tuple_to_nlattr)) |
65 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 66 | |
df6fb868 | 67 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
68 | |
69 | return ret; | |
70 | ||
df6fb868 | 71 | nla_put_failure: |
c1d10adb PNA |
72 | return -1; |
73 | } | |
74 | ||
75 | static inline int | |
1cde6436 PNA |
76 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
77 | const struct nf_conntrack_tuple *tuple, | |
78 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 79 | { |
c1d10adb | 80 | int ret = 0; |
df6fb868 PM |
81 | struct nlattr *nest_parms; |
82 | ||
83 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
84 | if (!nest_parms) | |
85 | goto nla_put_failure; | |
1cde6436 | 86 | |
fdf70832 PM |
87 | if (likely(l3proto->tuple_to_nlattr)) |
88 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 89 | |
df6fb868 | 90 | nla_nest_end(skb, nest_parms); |
c1d10adb | 91 | |
1cde6436 PNA |
92 | return ret; |
93 | ||
df6fb868 | 94 | nla_put_failure: |
1cde6436 PNA |
95 | return -1; |
96 | } | |
97 | ||
bb5cf80e | 98 | static int |
1cde6436 PNA |
99 | ctnetlink_dump_tuples(struct sk_buff *skb, |
100 | const struct nf_conntrack_tuple *tuple) | |
101 | { | |
102 | int ret; | |
103 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 104 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 PNA |
105 | |
106 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
107 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); | |
c1d10adb PNA |
108 | nf_ct_l3proto_put(l3proto); |
109 | ||
110 | if (unlikely(ret < 0)) | |
111 | return ret; | |
112 | ||
605dcad6 MJ |
113 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
114 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); | |
115 | nf_ct_l4proto_put(l4proto); | |
c1d10adb PNA |
116 | |
117 | return ret; | |
c1d10adb PNA |
118 | } |
119 | ||
120 | static inline int | |
121 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
122 | { | |
77236b6e | 123 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
124 | return 0; |
125 | ||
df6fb868 | 126 | nla_put_failure: |
c1d10adb PNA |
127 | return -1; |
128 | } | |
129 | ||
130 | static inline int | |
131 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
132 | { | |
77236b6e | 133 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 134 | |
77236b6e | 135 | if (timeout < 0) |
c1d10adb | 136 | timeout = 0; |
601e68e1 | 137 | |
77236b6e | 138 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
139 | return 0; |
140 | ||
df6fb868 | 141 | nla_put_failure: |
c1d10adb PNA |
142 | return -1; |
143 | } | |
144 | ||
145 | static inline int | |
146 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
147 | { | |
5e8fbe2a | 148 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 149 | struct nlattr *nest_proto; |
c1d10adb PNA |
150 | int ret; |
151 | ||
5e8fbe2a | 152 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
fdf70832 | 153 | if (!l4proto->to_nlattr) { |
605dcad6 | 154 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
155 | return 0; |
156 | } | |
601e68e1 | 157 | |
df6fb868 PM |
158 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
159 | if (!nest_proto) | |
160 | goto nla_put_failure; | |
c1d10adb | 161 | |
fdf70832 | 162 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 163 | |
605dcad6 | 164 | nf_ct_l4proto_put(l4proto); |
c1d10adb | 165 | |
df6fb868 | 166 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
167 | |
168 | return ret; | |
169 | ||
df6fb868 | 170 | nla_put_failure: |
605dcad6 | 171 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
172 | return -1; |
173 | } | |
174 | ||
175 | static inline int | |
176 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
177 | { | |
df6fb868 | 178 | struct nlattr *nest_helper; |
dc808fe2 | 179 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 180 | struct nf_conntrack_helper *helper; |
c1d10adb | 181 | |
3c158f7f | 182 | if (!help) |
c1d10adb | 183 | return 0; |
601e68e1 | 184 | |
3c158f7f PM |
185 | rcu_read_lock(); |
186 | helper = rcu_dereference(help->helper); | |
187 | if (!helper) | |
188 | goto out; | |
189 | ||
df6fb868 PM |
190 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
191 | if (!nest_helper) | |
192 | goto nla_put_failure; | |
77236b6e | 193 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 194 | |
fdf70832 PM |
195 | if (helper->to_nlattr) |
196 | helper->to_nlattr(skb, ct); | |
c1d10adb | 197 | |
df6fb868 | 198 | nla_nest_end(skb, nest_helper); |
3c158f7f PM |
199 | out: |
200 | rcu_read_unlock(); | |
c1d10adb PNA |
201 | return 0; |
202 | ||
df6fb868 | 203 | nla_put_failure: |
3c158f7f | 204 | rcu_read_unlock(); |
c1d10adb PNA |
205 | return -1; |
206 | } | |
207 | ||
208 | #ifdef CONFIG_NF_CT_ACCT | |
bb5cf80e | 209 | static int |
c1d10adb PNA |
210 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
211 | enum ip_conntrack_dir dir) | |
212 | { | |
213 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 214 | struct nlattr *nest_count; |
c1d10adb | 215 | |
df6fb868 PM |
216 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
217 | if (!nest_count) | |
218 | goto nla_put_failure; | |
219 | ||
77236b6e PM |
220 | NLA_PUT_BE32(skb, CTA_COUNTERS32_PACKETS, |
221 | htonl(ct->counters[dir].packets)); | |
222 | NLA_PUT_BE32(skb, CTA_COUNTERS32_BYTES, | |
223 | htonl(ct->counters[dir].bytes)); | |
c1d10adb | 224 | |
df6fb868 | 225 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
226 | |
227 | return 0; | |
228 | ||
df6fb868 | 229 | nla_put_failure: |
c1d10adb PNA |
230 | return -1; |
231 | } | |
232 | #else | |
233 | #define ctnetlink_dump_counters(a, b, c) (0) | |
234 | #endif | |
235 | ||
236 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
237 | static inline int | |
238 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
239 | { | |
77236b6e | 240 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
241 | return 0; |
242 | ||
df6fb868 | 243 | nla_put_failure: |
c1d10adb PNA |
244 | return -1; |
245 | } | |
246 | #else | |
247 | #define ctnetlink_dump_mark(a, b) (0) | |
248 | #endif | |
249 | ||
37fccd85 PNA |
250 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
251 | static inline int | |
252 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
253 | { | |
77236b6e | 254 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
255 | return 0; |
256 | ||
257 | nla_put_failure: | |
258 | return -1; | |
259 | } | |
260 | #else | |
261 | #define ctnetlink_dump_secmark(a, b) (0) | |
262 | #endif | |
263 | ||
0f417ce9 PNA |
264 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
265 | ||
266 | static inline int | |
267 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
268 | { | |
269 | struct nlattr *nest_parms; | |
270 | ||
271 | if (!(ct->status & IPS_EXPECTED)) | |
272 | return 0; | |
273 | ||
274 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
275 | if (!nest_parms) | |
276 | goto nla_put_failure; | |
277 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
278 | goto nla_put_failure; | |
279 | nla_nest_end(skb, nest_parms); | |
280 | ||
281 | return 0; | |
282 | ||
283 | nla_put_failure: | |
284 | return -1; | |
285 | } | |
286 | ||
13eae15a | 287 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 288 | static int |
13eae15a PNA |
289 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
290 | { | |
13eae15a PNA |
291 | struct nlattr *nest_parms; |
292 | ||
293 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
294 | if (!nest_parms) | |
295 | goto nla_put_failure; | |
296 | ||
77236b6e PM |
297 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
298 | htonl(natseq->correction_pos)); | |
299 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
300 | htonl(natseq->offset_before)); | |
301 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
302 | htonl(natseq->offset_after)); | |
13eae15a PNA |
303 | |
304 | nla_nest_end(skb, nest_parms); | |
305 | ||
306 | return 0; | |
307 | ||
308 | nla_put_failure: | |
309 | return -1; | |
310 | } | |
311 | ||
312 | static inline int | |
313 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
314 | { | |
315 | struct nf_nat_seq *natseq; | |
316 | struct nf_conn_nat *nat = nfct_nat(ct); | |
317 | ||
318 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
319 | return 0; | |
320 | ||
321 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
322 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
323 | return -1; | |
324 | ||
325 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
326 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
327 | return -1; | |
328 | ||
329 | return 0; | |
330 | } | |
331 | #else | |
332 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
333 | #endif | |
334 | ||
c1d10adb PNA |
335 | static inline int |
336 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
337 | { | |
77236b6e | 338 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
339 | return 0; |
340 | ||
df6fb868 | 341 | nla_put_failure: |
c1d10adb PNA |
342 | return -1; |
343 | } | |
344 | ||
345 | static inline int | |
346 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
347 | { | |
77236b6e | 348 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
349 | return 0; |
350 | ||
df6fb868 | 351 | nla_put_failure: |
c1d10adb PNA |
352 | return -1; |
353 | } | |
354 | ||
355 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) | |
356 | ||
357 | static int | |
358 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 | 359 | int event, int nowait, |
c1d10adb PNA |
360 | const struct nf_conn *ct) |
361 | { | |
362 | struct nlmsghdr *nlh; | |
363 | struct nfgenmsg *nfmsg; | |
df6fb868 | 364 | struct nlattr *nest_parms; |
27a884dc | 365 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
366 | |
367 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
368 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
369 | nfmsg = NLMSG_DATA(nlh); | |
370 | ||
371 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
5e8fbe2a | 372 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
373 | nfmsg->version = NFNETLINK_V0; |
374 | nfmsg->res_id = 0; | |
375 | ||
df6fb868 PM |
376 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
377 | if (!nest_parms) | |
378 | goto nla_put_failure; | |
c1d10adb | 379 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
380 | goto nla_put_failure; |
381 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 382 | |
df6fb868 PM |
383 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
384 | if (!nest_parms) | |
385 | goto nla_put_failure; | |
c1d10adb | 386 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
387 | goto nla_put_failure; |
388 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
389 | |
390 | if (ctnetlink_dump_status(skb, ct) < 0 || | |
391 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
392 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
393 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
394 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
395 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
396 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 397 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 398 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 399 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 400 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 401 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 402 | goto nla_put_failure; |
c1d10adb | 403 | |
27a884dc | 404 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
405 | return skb->len; |
406 | ||
407 | nlmsg_failure: | |
df6fb868 | 408 | nla_put_failure: |
dc5fc579 | 409 | nlmsg_trim(skb, b); |
c1d10adb PNA |
410 | return -1; |
411 | } | |
412 | ||
413 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
414 | static int ctnetlink_conntrack_event(struct notifier_block *this, | |
601e68e1 | 415 | unsigned long events, void *ptr) |
c1d10adb PNA |
416 | { |
417 | struct nlmsghdr *nlh; | |
418 | struct nfgenmsg *nfmsg; | |
df6fb868 | 419 | struct nlattr *nest_parms; |
c1d10adb PNA |
420 | struct nf_conn *ct = (struct nf_conn *)ptr; |
421 | struct sk_buff *skb; | |
422 | unsigned int type; | |
27a884dc | 423 | sk_buff_data_t b; |
c1d10adb PNA |
424 | unsigned int flags = 0, group; |
425 | ||
426 | /* ignore our fake conntrack entry */ | |
427 | if (ct == &nf_conntrack_untracked) | |
428 | return NOTIFY_DONE; | |
429 | ||
430 | if (events & IPCT_DESTROY) { | |
431 | type = IPCTNL_MSG_CT_DELETE; | |
432 | group = NFNLGRP_CONNTRACK_DESTROY; | |
433 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { | |
434 | type = IPCTNL_MSG_CT_NEW; | |
435 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 436 | group = NFNLGRP_CONNTRACK_NEW; |
1a31526b | 437 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
c1d10adb PNA |
438 | type = IPCTNL_MSG_CT_NEW; |
439 | group = NFNLGRP_CONNTRACK_UPDATE; | |
440 | } else | |
441 | return NOTIFY_DONE; | |
a2427692 PM |
442 | |
443 | if (!nfnetlink_has_listeners(group)) | |
444 | return NOTIFY_DONE; | |
445 | ||
c1d10adb PNA |
446 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
447 | if (!skb) | |
448 | return NOTIFY_DONE; | |
449 | ||
450 | b = skb->tail; | |
451 | ||
452 | type |= NFNL_SUBSYS_CTNETLINK << 8; | |
453 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); | |
454 | nfmsg = NLMSG_DATA(nlh); | |
455 | ||
456 | nlh->nlmsg_flags = flags; | |
5e8fbe2a | 457 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
458 | nfmsg->version = NFNETLINK_V0; |
459 | nfmsg->res_id = 0; | |
460 | ||
df6fb868 PM |
461 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
462 | if (!nest_parms) | |
463 | goto nla_put_failure; | |
c1d10adb | 464 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
465 | goto nla_put_failure; |
466 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 467 | |
df6fb868 PM |
468 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
469 | if (!nest_parms) | |
470 | goto nla_put_failure; | |
c1d10adb | 471 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
472 | goto nla_put_failure; |
473 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 474 | |
1eedf699 EL |
475 | if (ctnetlink_dump_id(skb, ct) < 0) |
476 | goto nla_put_failure; | |
477 | ||
7b621c1e PNA |
478 | if (events & IPCT_DESTROY) { |
479 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
480 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 481 | goto nla_put_failure; |
7b621c1e PNA |
482 | } else { |
483 | if (ctnetlink_dump_status(skb, ct) < 0) | |
df6fb868 | 484 | goto nla_put_failure; |
7b621c1e PNA |
485 | |
486 | if (ctnetlink_dump_timeout(skb, ct) < 0) | |
df6fb868 | 487 | goto nla_put_failure; |
7b621c1e PNA |
488 | |
489 | if (events & IPCT_PROTOINFO | |
490 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 491 | goto nla_put_failure; |
7b621c1e PNA |
492 | |
493 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
494 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 495 | goto nla_put_failure; |
7b621c1e | 496 | |
37fccd85 PNA |
497 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
498 | if ((events & IPCT_SECMARK || ct->secmark) | |
499 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
500 | goto nla_put_failure; | |
501 | #endif | |
7b621c1e PNA |
502 | |
503 | if (events & IPCT_COUNTER_FILLING && | |
504 | (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
505 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)) | |
df6fb868 | 506 | goto nla_put_failure; |
13eae15a | 507 | |
0f417ce9 PNA |
508 | if (events & IPCT_RELATED && |
509 | ctnetlink_dump_master(skb, ct) < 0) | |
510 | goto nla_put_failure; | |
511 | ||
13eae15a PNA |
512 | if (events & IPCT_NATSEQADJ && |
513 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
514 | goto nla_put_failure; | |
7b621c1e | 515 | } |
b9a37e0c | 516 | |
a83099a6 EL |
517 | #ifdef CONFIG_NF_CONNTRACK_MARK |
518 | if ((events & IPCT_MARK || ct->mark) | |
519 | && ctnetlink_dump_mark(skb, ct) < 0) | |
520 | goto nla_put_failure; | |
521 | #endif | |
522 | ||
c1d10adb PNA |
523 | nlh->nlmsg_len = skb->tail - b; |
524 | nfnetlink_send(skb, 0, group, 0); | |
525 | return NOTIFY_DONE; | |
526 | ||
527 | nlmsg_failure: | |
df6fb868 | 528 | nla_put_failure: |
c1d10adb PNA |
529 | kfree_skb(skb); |
530 | return NOTIFY_DONE; | |
531 | } | |
532 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
533 | ||
534 | static int ctnetlink_done(struct netlink_callback *cb) | |
535 | { | |
89f2e218 PM |
536 | if (cb->args[1]) |
537 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
538 | return 0; |
539 | } | |
540 | ||
541 | static int | |
542 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
543 | { | |
89f2e218 | 544 | struct nf_conn *ct, *last; |
c1d10adb | 545 | struct nf_conntrack_tuple_hash *h; |
f205c5e0 | 546 | struct hlist_node *n; |
87711cb8 PNA |
547 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
548 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 549 | |
76507f69 | 550 | rcu_read_lock(); |
d205dc40 | 551 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
552 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
553 | restart: | |
76507f69 PM |
554 | hlist_for_each_entry_rcu(h, n, &nf_conntrack_hash[cb->args[0]], |
555 | hnode) { | |
5b1158e9 | 556 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
557 | continue; |
558 | ct = nf_ct_tuplehash_to_ctrack(h); | |
87711cb8 PNA |
559 | /* Dump entries of a given L3 protocol number. |
560 | * If it is not specified, ie. l3proto == 0, | |
561 | * then dump everything. */ | |
5e8fbe2a | 562 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
87711cb8 | 563 | continue; |
d205dc40 PM |
564 | if (cb->args[1]) { |
565 | if (ct != last) | |
89f2e218 | 566 | continue; |
d205dc40 | 567 | cb->args[1] = 0; |
89f2e218 | 568 | } |
c1d10adb | 569 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 570 | cb->nlh->nlmsg_seq, |
c1d10adb | 571 | IPCTNL_MSG_CT_NEW, |
89f2e218 | 572 | 1, ct) < 0) { |
76507f69 PM |
573 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
574 | continue; | |
89f2e218 | 575 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 576 | goto out; |
89f2e218 | 577 | } |
01f34848 PNA |
578 | #ifdef CONFIG_NF_CT_ACCT |
579 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == | |
580 | IPCTNL_MSG_CT_GET_CTRZERO) | |
581 | memset(&ct->counters, 0, sizeof(ct->counters)); | |
582 | #endif | |
89f2e218 | 583 | } |
d205dc40 | 584 | if (cb->args[1]) { |
89f2e218 PM |
585 | cb->args[1] = 0; |
586 | goto restart; | |
c1d10adb PNA |
587 | } |
588 | } | |
89f2e218 | 589 | out: |
76507f69 | 590 | rcu_read_unlock(); |
d205dc40 PM |
591 | if (last) |
592 | nf_ct_put(last); | |
c1d10adb | 593 | |
c1d10adb PNA |
594 | return skb->len; |
595 | } | |
596 | ||
c1d10adb | 597 | static inline int |
df6fb868 | 598 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 599 | { |
df6fb868 | 600 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
601 | struct nf_conntrack_l3proto *l3proto; |
602 | int ret = 0; | |
603 | ||
df6fb868 | 604 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb PNA |
605 | |
606 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
607 | ||
f73e924c PM |
608 | if (likely(l3proto->nlattr_to_tuple)) { |
609 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
610 | l3proto->nla_policy); | |
611 | if (ret == 0) | |
612 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
613 | } | |
c1d10adb PNA |
614 | |
615 | nf_ct_l3proto_put(l3proto); | |
616 | ||
c1d10adb PNA |
617 | return ret; |
618 | } | |
619 | ||
f73e924c PM |
620 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
621 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
622 | }; |
623 | ||
624 | static inline int | |
df6fb868 | 625 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
626 | struct nf_conntrack_tuple *tuple) |
627 | { | |
df6fb868 | 628 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 629 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
630 | int ret = 0; |
631 | ||
f73e924c PM |
632 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
633 | if (ret < 0) | |
634 | return ret; | |
c1d10adb | 635 | |
df6fb868 | 636 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 637 | return -EINVAL; |
77236b6e | 638 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 639 | |
605dcad6 | 640 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
c1d10adb | 641 | |
f73e924c PM |
642 | if (likely(l4proto->nlattr_to_tuple)) { |
643 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
644 | l4proto->nla_policy); | |
645 | if (ret == 0) | |
646 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
647 | } | |
c1d10adb | 648 | |
605dcad6 | 649 | nf_ct_l4proto_put(l4proto); |
601e68e1 | 650 | |
c1d10adb PNA |
651 | return ret; |
652 | } | |
653 | ||
bb5cf80e | 654 | static int |
df6fb868 | 655 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
656 | enum ctattr_tuple type, u_int8_t l3num) |
657 | { | |
df6fb868 | 658 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
659 | int err; |
660 | ||
c1d10adb PNA |
661 | memset(tuple, 0, sizeof(*tuple)); |
662 | ||
df6fb868 | 663 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 664 | |
df6fb868 | 665 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
666 | return -EINVAL; |
667 | ||
668 | tuple->src.l3num = l3num; | |
669 | ||
df6fb868 | 670 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
671 | if (err < 0) |
672 | return err; | |
673 | ||
df6fb868 | 674 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
675 | return -EINVAL; |
676 | ||
df6fb868 | 677 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
678 | if (err < 0) |
679 | return err; | |
680 | ||
681 | /* orig and expect tuples get DIR_ORIGINAL */ | |
682 | if (type == CTA_TUPLE_REPLY) | |
683 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
684 | else | |
685 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
686 | ||
c1d10adb PNA |
687 | return 0; |
688 | } | |
689 | ||
5b1158e9 | 690 | #ifdef CONFIG_NF_NAT_NEEDED |
f73e924c PM |
691 | static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = { |
692 | [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 }, | |
693 | [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 }, | |
c1d10adb PNA |
694 | }; |
695 | ||
df6fb868 | 696 | static int nfnetlink_parse_nat_proto(struct nlattr *attr, |
c1d10adb | 697 | const struct nf_conn *ct, |
5b1158e9 | 698 | struct nf_nat_range *range) |
c1d10adb | 699 | { |
df6fb868 | 700 | struct nlattr *tb[CTA_PROTONAT_MAX+1]; |
2b628a08 | 701 | const struct nf_nat_protocol *npt; |
f73e924c | 702 | int err; |
c1d10adb | 703 | |
f73e924c PM |
704 | err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy); |
705 | if (err < 0) | |
706 | return err; | |
c1d10adb | 707 | |
5e8fbe2a | 708 | npt = nf_nat_proto_find_get(nf_ct_protonum(ct)); |
ca6a5074 PM |
709 | if (npt->nlattr_to_range) |
710 | err = npt->nlattr_to_range(tb, range); | |
5b1158e9 | 711 | nf_nat_proto_put(npt); |
ca6a5074 | 712 | return err; |
c1d10adb PNA |
713 | } |
714 | ||
f73e924c PM |
715 | static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = { |
716 | [CTA_NAT_MINIP] = { .type = NLA_U32 }, | |
717 | [CTA_NAT_MAXIP] = { .type = NLA_U32 }, | |
c1d10adb PNA |
718 | }; |
719 | ||
720 | static inline int | |
df6fb868 | 721 | nfnetlink_parse_nat(struct nlattr *nat, |
5b1158e9 | 722 | const struct nf_conn *ct, struct nf_nat_range *range) |
c1d10adb | 723 | { |
df6fb868 | 724 | struct nlattr *tb[CTA_NAT_MAX+1]; |
c1d10adb PNA |
725 | int err; |
726 | ||
c1d10adb | 727 | memset(range, 0, sizeof(*range)); |
601e68e1 | 728 | |
f73e924c PM |
729 | err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy); |
730 | if (err < 0) | |
731 | return err; | |
c1d10adb | 732 | |
df6fb868 | 733 | if (tb[CTA_NAT_MINIP]) |
77236b6e | 734 | range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]); |
c1d10adb | 735 | |
df6fb868 | 736 | if (!tb[CTA_NAT_MAXIP]) |
c1d10adb PNA |
737 | range->max_ip = range->min_ip; |
738 | else | |
77236b6e | 739 | range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]); |
c1d10adb PNA |
740 | |
741 | if (range->min_ip) | |
742 | range->flags |= IP_NAT_RANGE_MAP_IPS; | |
743 | ||
df6fb868 | 744 | if (!tb[CTA_NAT_PROTO]) |
c1d10adb PNA |
745 | return 0; |
746 | ||
df6fb868 | 747 | err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range); |
c1d10adb PNA |
748 | if (err < 0) |
749 | return err; | |
750 | ||
c1d10adb PNA |
751 | return 0; |
752 | } | |
753 | #endif | |
754 | ||
755 | static inline int | |
df6fb868 | 756 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 757 | { |
df6fb868 | 758 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 759 | |
df6fb868 | 760 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 761 | |
df6fb868 | 762 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
763 | return -EINVAL; |
764 | ||
df6fb868 | 765 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
766 | |
767 | return 0; | |
768 | } | |
769 | ||
f73e924c PM |
770 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
771 | [CTA_STATUS] = { .type = NLA_U32 }, | |
772 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
773 | [CTA_MARK] = { .type = NLA_U32 }, | |
774 | [CTA_USE] = { .type = NLA_U32 }, | |
775 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
776 | }; |
777 | ||
778 | static int | |
601e68e1 | 779 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 780 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
781 | { |
782 | struct nf_conntrack_tuple_hash *h; | |
783 | struct nf_conntrack_tuple tuple; | |
784 | struct nf_conn *ct; | |
785 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
786 | u_int8_t u3 = nfmsg->nfgen_family; | |
787 | int err = 0; | |
788 | ||
df6fb868 | 789 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 790 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 791 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
792 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
793 | else { | |
794 | /* Flush the whole table */ | |
795 | nf_conntrack_flush(); | |
796 | return 0; | |
797 | } | |
798 | ||
799 | if (err < 0) | |
800 | return err; | |
801 | ||
330f7db5 | 802 | h = nf_conntrack_find_get(&tuple); |
9ea8cfd6 | 803 | if (!h) |
c1d10adb | 804 | return -ENOENT; |
c1d10adb PNA |
805 | |
806 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 807 | |
df6fb868 | 808 | if (cda[CTA_ID]) { |
77236b6e | 809 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 810 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
811 | nf_ct_put(ct); |
812 | return -ENOENT; | |
813 | } | |
601e68e1 | 814 | } |
c1d10adb PNA |
815 | if (del_timer(&ct->timeout)) |
816 | ct->timeout.function((unsigned long)ct); | |
817 | ||
818 | nf_ct_put(ct); | |
c1d10adb PNA |
819 | |
820 | return 0; | |
821 | } | |
822 | ||
823 | static int | |
601e68e1 | 824 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 825 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
826 | { |
827 | struct nf_conntrack_tuple_hash *h; | |
828 | struct nf_conntrack_tuple tuple; | |
829 | struct nf_conn *ct; | |
830 | struct sk_buff *skb2 = NULL; | |
831 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
832 | u_int8_t u3 = nfmsg->nfgen_family; | |
833 | int err = 0; | |
834 | ||
c1d10adb | 835 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
01f34848 PNA |
836 | #ifndef CONFIG_NF_CT_ACCT |
837 | if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO) | |
c1d10adb PNA |
838 | return -ENOTSUPP; |
839 | #endif | |
c702e804 TG |
840 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
841 | ctnetlink_done); | |
c1d10adb PNA |
842 | } |
843 | ||
df6fb868 | 844 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 845 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 846 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
847 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
848 | else | |
849 | return -EINVAL; | |
850 | ||
851 | if (err < 0) | |
852 | return err; | |
853 | ||
330f7db5 | 854 | h = nf_conntrack_find_get(&tuple); |
9ea8cfd6 | 855 | if (!h) |
c1d10adb | 856 | return -ENOENT; |
9ea8cfd6 | 857 | |
c1d10adb PNA |
858 | ct = nf_ct_tuplehash_to_ctrack(h); |
859 | ||
860 | err = -ENOMEM; | |
861 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
862 | if (!skb2) { | |
863 | nf_ct_put(ct); | |
864 | return -ENOMEM; | |
865 | } | |
c1d10adb | 866 | |
601e68e1 | 867 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
c1d10adb PNA |
868 | IPCTNL_MSG_CT_NEW, 1, ct); |
869 | nf_ct_put(ct); | |
870 | if (err <= 0) | |
871 | goto free; | |
872 | ||
873 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
874 | if (err < 0) | |
875 | goto out; | |
876 | ||
c1d10adb PNA |
877 | return 0; |
878 | ||
879 | free: | |
880 | kfree_skb(skb2); | |
881 | out: | |
882 | return err; | |
883 | } | |
884 | ||
bb5cf80e | 885 | static int |
df6fb868 | 886 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
887 | { |
888 | unsigned long d; | |
77236b6e | 889 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
890 | d = ct->status ^ status; |
891 | ||
892 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
893 | /* unchangeable */ | |
894 | return -EINVAL; | |
601e68e1 | 895 | |
c1d10adb PNA |
896 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
897 | /* SEEN_REPLY bit can only be set */ | |
898 | return -EINVAL; | |
899 | ||
601e68e1 | 900 | |
c1d10adb PNA |
901 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
902 | /* ASSURED bit can only be set */ | |
903 | return -EINVAL; | |
904 | ||
df6fb868 | 905 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
5b1158e9 | 906 | #ifndef CONFIG_NF_NAT_NEEDED |
c1d10adb PNA |
907 | return -EINVAL; |
908 | #else | |
5b1158e9 | 909 | struct nf_nat_range range; |
c1d10adb | 910 | |
df6fb868 PM |
911 | if (cda[CTA_NAT_DST]) { |
912 | if (nfnetlink_parse_nat(cda[CTA_NAT_DST], ct, | |
3726add7 PM |
913 | &range) < 0) |
914 | return -EINVAL; | |
cc01dcbd | 915 | if (nf_nat_initialized(ct, IP_NAT_MANIP_DST)) |
3726add7 | 916 | return -EEXIST; |
cc01dcbd | 917 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST); |
3726add7 | 918 | } |
df6fb868 PM |
919 | if (cda[CTA_NAT_SRC]) { |
920 | if (nfnetlink_parse_nat(cda[CTA_NAT_SRC], ct, | |
3726add7 PM |
921 | &range) < 0) |
922 | return -EINVAL; | |
cc01dcbd | 923 | if (nf_nat_initialized(ct, IP_NAT_MANIP_SRC)) |
3726add7 | 924 | return -EEXIST; |
cc01dcbd | 925 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC); |
3726add7 | 926 | } |
c1d10adb PNA |
927 | #endif |
928 | } | |
929 | ||
930 | /* Be careful here, modifying NAT bits can screw up things, | |
931 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 932 | * nf_nat_range. */ |
c1d10adb PNA |
933 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
934 | return 0; | |
935 | } | |
936 | ||
937 | ||
938 | static inline int | |
df6fb868 | 939 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
940 | { |
941 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 942 | struct nf_conn_help *help = nfct_help(ct); |
c1d10adb PNA |
943 | char *helpname; |
944 | int err; | |
945 | ||
c1d10adb PNA |
946 | /* don't change helper of sibling connections */ |
947 | if (ct->master) | |
948 | return -EINVAL; | |
949 | ||
df6fb868 | 950 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
951 | if (err < 0) |
952 | return err; | |
953 | ||
df293bbb YK |
954 | if (!strcmp(helpname, "")) { |
955 | if (help && help->helper) { | |
c1d10adb PNA |
956 | /* we had a helper before ... */ |
957 | nf_ct_remove_expectations(ct); | |
3c158f7f | 958 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 959 | } |
df293bbb YK |
960 | |
961 | return 0; | |
c1d10adb | 962 | } |
601e68e1 | 963 | |
df293bbb YK |
964 | helper = __nf_conntrack_helper_find_byname(helpname); |
965 | if (helper == NULL) | |
966 | return -EINVAL; | |
967 | ||
ceceae1b YK |
968 | if (help) { |
969 | if (help->helper == helper) | |
970 | return 0; | |
971 | if (help->helper) | |
972 | return -EBUSY; | |
973 | /* need to zero data of old helper */ | |
974 | memset(&help->help, 0, sizeof(help->help)); | |
975 | } else { | |
b560580a | 976 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
ceceae1b YK |
977 | if (help == NULL) |
978 | return -ENOMEM; | |
979 | } | |
df293bbb | 980 | |
3c158f7f | 981 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
982 | |
983 | return 0; | |
984 | } | |
985 | ||
986 | static inline int | |
df6fb868 | 987 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 988 | { |
77236b6e | 989 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 990 | |
c1d10adb PNA |
991 | if (!del_timer(&ct->timeout)) |
992 | return -ETIME; | |
993 | ||
994 | ct->timeout.expires = jiffies + timeout * HZ; | |
995 | add_timer(&ct->timeout); | |
996 | ||
997 | return 0; | |
998 | } | |
999 | ||
1000 | static inline int | |
df6fb868 | 1001 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1002 | { |
df6fb868 | 1003 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 1004 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1005 | int err = 0; |
1006 | ||
df6fb868 | 1007 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 1008 | |
5e8fbe2a | 1009 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
fdf70832 PM |
1010 | if (l4proto->from_nlattr) |
1011 | err = l4proto->from_nlattr(tb, ct); | |
605dcad6 | 1012 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
1013 | |
1014 | return err; | |
1015 | } | |
1016 | ||
13eae15a PNA |
1017 | #ifdef CONFIG_NF_NAT_NEEDED |
1018 | static inline int | |
1019 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1020 | { | |
1021 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1022 | ||
1023 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1024 | ||
1025 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1026 | return -EINVAL; | |
1027 | ||
1028 | natseq->correction_pos = | |
77236b6e | 1029 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1030 | |
1031 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1032 | return -EINVAL; | |
1033 | ||
1034 | natseq->offset_before = | |
77236b6e | 1035 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1036 | |
1037 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | natseq->offset_after = | |
77236b6e | 1041 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1042 | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static int | |
1047 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1048 | { | |
1049 | int ret = 0; | |
1050 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1051 | ||
1052 | if (!nat) | |
1053 | return 0; | |
1054 | ||
1055 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1056 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1057 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1058 | if (ret < 0) | |
1059 | return ret; | |
1060 | ||
1061 | ct->status |= IPS_SEQ_ADJUST; | |
1062 | } | |
1063 | ||
1064 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1065 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1066 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1067 | if (ret < 0) | |
1068 | return ret; | |
1069 | ||
1070 | ct->status |= IPS_SEQ_ADJUST; | |
1071 | } | |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | #endif | |
1076 | ||
c1d10adb | 1077 | static int |
df6fb868 | 1078 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1079 | { |
1080 | int err; | |
1081 | ||
df6fb868 | 1082 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1083 | err = ctnetlink_change_helper(ct, cda); |
1084 | if (err < 0) | |
1085 | return err; | |
1086 | } | |
1087 | ||
df6fb868 | 1088 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1089 | err = ctnetlink_change_timeout(ct, cda); |
1090 | if (err < 0) | |
1091 | return err; | |
1092 | } | |
1093 | ||
df6fb868 | 1094 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1095 | err = ctnetlink_change_status(ct, cda); |
1096 | if (err < 0) | |
1097 | return err; | |
1098 | } | |
1099 | ||
df6fb868 | 1100 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1101 | err = ctnetlink_change_protoinfo(ct, cda); |
1102 | if (err < 0) | |
1103 | return err; | |
1104 | } | |
1105 | ||
bcd1e830 | 1106 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1107 | if (cda[CTA_MARK]) |
77236b6e | 1108 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1109 | #endif |
1110 | ||
13eae15a PNA |
1111 | #ifdef CONFIG_NF_NAT_NEEDED |
1112 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1113 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1114 | if (err < 0) | |
1115 | return err; | |
1116 | } | |
1117 | #endif | |
1118 | ||
c1d10adb PNA |
1119 | return 0; |
1120 | } | |
1121 | ||
1122 | static int | |
df6fb868 | 1123 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1124 | struct nf_conntrack_tuple *otuple, |
5faa1f4c PNA |
1125 | struct nf_conntrack_tuple *rtuple, |
1126 | struct nf_conn *master_ct) | |
c1d10adb PNA |
1127 | { |
1128 | struct nf_conn *ct; | |
1129 | int err = -EINVAL; | |
dafc741c | 1130 | struct nf_conn_help *help; |
ceceae1b | 1131 | struct nf_conntrack_helper *helper; |
c1d10adb | 1132 | |
c1d10adb PNA |
1133 | ct = nf_conntrack_alloc(otuple, rtuple); |
1134 | if (ct == NULL || IS_ERR(ct)) | |
601e68e1 | 1135 | return -ENOMEM; |
c1d10adb | 1136 | |
df6fb868 | 1137 | if (!cda[CTA_TIMEOUT]) |
c1d10adb | 1138 | goto err; |
77236b6e | 1139 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1140 | |
1141 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1142 | ct->status |= IPS_CONFIRMED; | |
1143 | ||
df6fb868 | 1144 | if (cda[CTA_STATUS]) { |
bbb3357d PNA |
1145 | err = ctnetlink_change_status(ct, cda); |
1146 | if (err < 0) | |
1147 | goto err; | |
1148 | } | |
c1d10adb | 1149 | |
df6fb868 | 1150 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1151 | err = ctnetlink_change_protoinfo(ct, cda); |
1152 | if (err < 0) | |
c54ea3b9 | 1153 | goto err; |
c1d10adb PNA |
1154 | } |
1155 | ||
bcd1e830 | 1156 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1157 | if (cda[CTA_MARK]) |
77236b6e | 1158 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1159 | #endif |
1160 | ||
58a3c9bb PM |
1161 | rcu_read_lock(); |
1162 | helper = __nf_ct_helper_find(rtuple); | |
ceceae1b | 1163 | if (helper) { |
b560580a | 1164 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
ceceae1b | 1165 | if (help == NULL) { |
58a3c9bb | 1166 | rcu_read_unlock(); |
ceceae1b YK |
1167 | err = -ENOMEM; |
1168 | goto err; | |
1169 | } | |
3c158f7f PM |
1170 | /* not in hash table yet so not strictly necessary */ |
1171 | rcu_assign_pointer(help->helper, helper); | |
1172 | } | |
dafc741c | 1173 | |
5faa1f4c | 1174 | /* setup master conntrack: this is a confirmed expectation */ |
f2a89004 PNA |
1175 | if (master_ct) { |
1176 | __set_bit(IPS_EXPECTED_BIT, &ct->status); | |
5faa1f4c | 1177 | ct->master = master_ct; |
f2a89004 | 1178 | } |
5faa1f4c | 1179 | |
c1d10adb PNA |
1180 | add_timer(&ct->timeout); |
1181 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1182 | rcu_read_unlock(); |
dafc741c | 1183 | |
c1d10adb PNA |
1184 | return 0; |
1185 | ||
601e68e1 | 1186 | err: |
c1d10adb PNA |
1187 | nf_conntrack_free(ct); |
1188 | return err; | |
1189 | } | |
1190 | ||
601e68e1 YH |
1191 | static int |
1192 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1193 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1194 | { |
1195 | struct nf_conntrack_tuple otuple, rtuple; | |
1196 | struct nf_conntrack_tuple_hash *h = NULL; | |
1197 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1198 | u_int8_t u3 = nfmsg->nfgen_family; | |
1199 | int err = 0; | |
1200 | ||
df6fb868 | 1201 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1202 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1203 | if (err < 0) | |
1204 | return err; | |
1205 | } | |
1206 | ||
df6fb868 | 1207 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1208 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1209 | if (err < 0) | |
1210 | return err; | |
1211 | } | |
1212 | ||
f8ba1aff | 1213 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1214 | if (cda[CTA_TUPLE_ORIG]) |
ba419aff | 1215 | h = __nf_conntrack_find(&otuple); |
df6fb868 | 1216 | else if (cda[CTA_TUPLE_REPLY]) |
ba419aff | 1217 | h = __nf_conntrack_find(&rtuple); |
c1d10adb PNA |
1218 | |
1219 | if (h == NULL) { | |
5faa1f4c PNA |
1220 | struct nf_conntrack_tuple master; |
1221 | struct nf_conntrack_tuple_hash *master_h = NULL; | |
1222 | struct nf_conn *master_ct = NULL; | |
1223 | ||
1224 | if (cda[CTA_TUPLE_MASTER]) { | |
1225 | err = ctnetlink_parse_tuple(cda, | |
1226 | &master, | |
1227 | CTA_TUPLE_MASTER, | |
1228 | u3); | |
1229 | if (err < 0) | |
1d670fdc | 1230 | goto out_unlock; |
5faa1f4c | 1231 | |
ba419aff | 1232 | master_h = __nf_conntrack_find(&master); |
5faa1f4c PNA |
1233 | if (master_h == NULL) { |
1234 | err = -ENOENT; | |
1235 | goto out_unlock; | |
1236 | } | |
1237 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
1238 | atomic_inc(&master_ct->ct_general.use); | |
1239 | } | |
1240 | ||
f8ba1aff | 1241 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1242 | err = -ENOENT; |
1243 | if (nlh->nlmsg_flags & NLM_F_CREATE) | |
5faa1f4c PNA |
1244 | err = ctnetlink_create_conntrack(cda, |
1245 | &otuple, | |
1246 | &rtuple, | |
1247 | master_ct); | |
1248 | if (err < 0 && master_ct) | |
1249 | nf_ct_put(master_ct); | |
1250 | ||
c1d10adb PNA |
1251 | return err; |
1252 | } | |
1253 | /* implicit 'else' */ | |
1254 | ||
c1d10adb PNA |
1255 | /* We manipulate the conntrack inside the global conntrack table lock, |
1256 | * so there's no need to increase the refcount */ | |
c1d10adb | 1257 | err = -EEXIST; |
ff4ca827 PNA |
1258 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
1259 | /* we only allow nat config for new conntracks */ | |
df6fb868 | 1260 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
ff4ca827 PNA |
1261 | err = -EINVAL; |
1262 | goto out_unlock; | |
1263 | } | |
5faa1f4c PNA |
1264 | /* can't link an existing conntrack to a master */ |
1265 | if (cda[CTA_TUPLE_MASTER]) { | |
1266 | err = -EINVAL; | |
1267 | goto out_unlock; | |
1268 | } | |
ff4ca827 PNA |
1269 | err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), |
1270 | cda); | |
1271 | } | |
c1d10adb PNA |
1272 | |
1273 | out_unlock: | |
f8ba1aff | 1274 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1275 | return err; |
1276 | } | |
1277 | ||
601e68e1 YH |
1278 | /*********************************************************************** |
1279 | * EXPECT | |
1280 | ***********************************************************************/ | |
c1d10adb PNA |
1281 | |
1282 | static inline int | |
1283 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1284 | const struct nf_conntrack_tuple *tuple, | |
1285 | enum ctattr_expect type) | |
1286 | { | |
df6fb868 | 1287 | struct nlattr *nest_parms; |
601e68e1 | 1288 | |
df6fb868 PM |
1289 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1290 | if (!nest_parms) | |
1291 | goto nla_put_failure; | |
c1d10adb | 1292 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1293 | goto nla_put_failure; |
1294 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1295 | |
1296 | return 0; | |
1297 | ||
df6fb868 | 1298 | nla_put_failure: |
c1d10adb | 1299 | return -1; |
601e68e1 | 1300 | } |
c1d10adb | 1301 | |
1cde6436 PNA |
1302 | static inline int |
1303 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1304 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1305 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1306 | { |
1307 | int ret; | |
1308 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1309 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1310 | struct nf_conntrack_tuple m; |
df6fb868 | 1311 | struct nlattr *nest_parms; |
d4156e8c PM |
1312 | |
1313 | memset(&m, 0xFF, sizeof(m)); | |
1314 | m.src.u.all = mask->src.u.all; | |
1315 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1316 | ||
df6fb868 PM |
1317 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1318 | if (!nest_parms) | |
1319 | goto nla_put_failure; | |
1cde6436 PNA |
1320 | |
1321 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
d4156e8c | 1322 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1323 | nf_ct_l3proto_put(l3proto); |
1324 | ||
1325 | if (unlikely(ret < 0)) | |
df6fb868 | 1326 | goto nla_put_failure; |
1cde6436 | 1327 | |
605dcad6 | 1328 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1329 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
605dcad6 | 1330 | nf_ct_l4proto_put(l4proto); |
1cde6436 | 1331 | if (unlikely(ret < 0)) |
df6fb868 | 1332 | goto nla_put_failure; |
1cde6436 | 1333 | |
df6fb868 | 1334 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1335 | |
1336 | return 0; | |
1337 | ||
df6fb868 | 1338 | nla_put_failure: |
1cde6436 PNA |
1339 | return -1; |
1340 | } | |
1341 | ||
bb5cf80e | 1342 | static int |
c1d10adb | 1343 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1344 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1345 | { |
1346 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1347 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1348 | ||
1349 | if (timeout < 0) | |
1350 | timeout = 0; | |
c1d10adb PNA |
1351 | |
1352 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1353 | goto nla_put_failure; |
1cde6436 | 1354 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1355 | goto nla_put_failure; |
c1d10adb PNA |
1356 | if (ctnetlink_exp_dump_tuple(skb, |
1357 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1358 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1359 | goto nla_put_failure; |
601e68e1 | 1360 | |
d978e5da | 1361 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1362 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1363 | |
1364 | return 0; | |
601e68e1 | 1365 | |
df6fb868 | 1366 | nla_put_failure: |
c1d10adb PNA |
1367 | return -1; |
1368 | } | |
1369 | ||
1370 | static int | |
1371 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 YH |
1372 | int event, |
1373 | int nowait, | |
c1d10adb PNA |
1374 | const struct nf_conntrack_expect *exp) |
1375 | { | |
1376 | struct nlmsghdr *nlh; | |
1377 | struct nfgenmsg *nfmsg; | |
27a884dc | 1378 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1379 | |
1380 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1381 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1382 | nfmsg = NLMSG_DATA(nlh); | |
1383 | ||
1384 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
1385 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1386 | nfmsg->version = NFNETLINK_V0; | |
1387 | nfmsg->res_id = 0; | |
1388 | ||
1389 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1390 | goto nla_put_failure; |
c1d10adb | 1391 | |
27a884dc | 1392 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1393 | return skb->len; |
1394 | ||
1395 | nlmsg_failure: | |
df6fb868 | 1396 | nla_put_failure: |
dc5fc579 | 1397 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1398 | return -1; |
1399 | } | |
1400 | ||
1401 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1402 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1403 | unsigned long events, void *ptr) | |
1404 | { | |
1405 | struct nlmsghdr *nlh; | |
1406 | struct nfgenmsg *nfmsg; | |
1407 | struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr; | |
1408 | struct sk_buff *skb; | |
1409 | unsigned int type; | |
27a884dc | 1410 | sk_buff_data_t b; |
c1d10adb PNA |
1411 | int flags = 0; |
1412 | ||
1413 | if (events & IPEXP_NEW) { | |
1414 | type = IPCTNL_MSG_EXP_NEW; | |
1415 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1416 | } else | |
1417 | return NOTIFY_DONE; | |
1418 | ||
b3a27bfb PNA |
1419 | if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) |
1420 | return NOTIFY_DONE; | |
1421 | ||
c1d10adb PNA |
1422 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1423 | if (!skb) | |
1424 | return NOTIFY_DONE; | |
1425 | ||
1426 | b = skb->tail; | |
1427 | ||
b633ad5f | 1428 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
c1d10adb PNA |
1429 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
1430 | nfmsg = NLMSG_DATA(nlh); | |
1431 | ||
1432 | nlh->nlmsg_flags = flags; | |
1433 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1434 | nfmsg->version = NFNETLINK_V0; | |
1435 | nfmsg->res_id = 0; | |
1436 | ||
1437 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1438 | goto nla_put_failure; |
c1d10adb PNA |
1439 | |
1440 | nlh->nlmsg_len = skb->tail - b; | |
1441 | nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0); | |
1442 | return NOTIFY_DONE; | |
1443 | ||
1444 | nlmsg_failure: | |
df6fb868 | 1445 | nla_put_failure: |
c1d10adb PNA |
1446 | kfree_skb(skb); |
1447 | return NOTIFY_DONE; | |
1448 | } | |
1449 | #endif | |
cf6994c2 PM |
1450 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1451 | { | |
31f15875 PM |
1452 | if (cb->args[1]) |
1453 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1454 | return 0; |
1455 | } | |
c1d10adb PNA |
1456 | |
1457 | static int | |
1458 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1459 | { | |
cf6994c2 | 1460 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1461 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1462 | struct hlist_node *n; |
87711cb8 | 1463 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1464 | |
7d0742da | 1465 | rcu_read_lock(); |
31f15875 PM |
1466 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1467 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1468 | restart: |
31f15875 PM |
1469 | hlist_for_each_entry(exp, n, &nf_ct_expect_hash[cb->args[0]], |
1470 | hnode) { | |
1471 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1472 | continue; |
31f15875 PM |
1473 | if (cb->args[1]) { |
1474 | if (exp != last) | |
1475 | continue; | |
1476 | cb->args[1] = 0; | |
1477 | } | |
1478 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, | |
1479 | cb->nlh->nlmsg_seq, | |
1480 | IPCTNL_MSG_EXP_NEW, | |
1481 | 1, exp) < 0) { | |
7d0742da PM |
1482 | if (!atomic_inc_not_zero(&exp->use)) |
1483 | continue; | |
31f15875 PM |
1484 | cb->args[1] = (unsigned long)exp; |
1485 | goto out; | |
1486 | } | |
cf6994c2 | 1487 | } |
31f15875 PM |
1488 | if (cb->args[1]) { |
1489 | cb->args[1] = 0; | |
1490 | goto restart; | |
cf6994c2 PM |
1491 | } |
1492 | } | |
601e68e1 | 1493 | out: |
7d0742da | 1494 | rcu_read_unlock(); |
cf6994c2 PM |
1495 | if (last) |
1496 | nf_ct_expect_put(last); | |
c1d10adb | 1497 | |
c1d10adb PNA |
1498 | return skb->len; |
1499 | } | |
1500 | ||
f73e924c PM |
1501 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1502 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1503 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1504 | }; |
1505 | ||
1506 | static int | |
601e68e1 | 1507 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1508 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1509 | { |
1510 | struct nf_conntrack_tuple tuple; | |
1511 | struct nf_conntrack_expect *exp; | |
1512 | struct sk_buff *skb2; | |
1513 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1514 | u_int8_t u3 = nfmsg->nfgen_family; | |
1515 | int err = 0; | |
1516 | ||
c1d10adb | 1517 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1518 | return netlink_dump_start(ctnl, skb, nlh, |
1519 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1520 | ctnetlink_exp_done); |
c1d10adb PNA |
1521 | } |
1522 | ||
df6fb868 | 1523 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1524 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1525 | else | |
1526 | return -EINVAL; | |
1527 | ||
1528 | if (err < 0) | |
1529 | return err; | |
1530 | ||
6823645d | 1531 | exp = nf_ct_expect_find_get(&tuple); |
c1d10adb PNA |
1532 | if (!exp) |
1533 | return -ENOENT; | |
1534 | ||
df6fb868 | 1535 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1536 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1537 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1538 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1539 | return -ENOENT; |
1540 | } | |
601e68e1 | 1541 | } |
c1d10adb PNA |
1542 | |
1543 | err = -ENOMEM; | |
1544 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1545 | if (!skb2) | |
1546 | goto out; | |
4e9b8269 | 1547 | |
601e68e1 | 1548 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
c1d10adb PNA |
1549 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
1550 | 1, exp); | |
1551 | if (err <= 0) | |
1552 | goto free; | |
1553 | ||
6823645d | 1554 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1555 | |
1556 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1557 | ||
1558 | free: | |
1559 | kfree_skb(skb2); | |
1560 | out: | |
6823645d | 1561 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1562 | return err; |
1563 | } | |
1564 | ||
1565 | static int | |
601e68e1 | 1566 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1567 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1568 | { |
31f15875 | 1569 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1570 | struct nf_conntrack_tuple tuple; |
1571 | struct nf_conntrack_helper *h; | |
1572 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1573 | struct hlist_node *n, *next; |
c1d10adb | 1574 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1575 | unsigned int i; |
c1d10adb PNA |
1576 | int err; |
1577 | ||
df6fb868 | 1578 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1579 | /* delete a single expect by tuple */ |
1580 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1581 | if (err < 0) | |
1582 | return err; | |
1583 | ||
1584 | /* bump usage count to 2 */ | |
6823645d | 1585 | exp = nf_ct_expect_find_get(&tuple); |
c1d10adb PNA |
1586 | if (!exp) |
1587 | return -ENOENT; | |
1588 | ||
df6fb868 | 1589 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1590 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1591 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1592 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1593 | return -ENOENT; |
1594 | } | |
1595 | } | |
1596 | ||
1597 | /* after list removal, usage count == 1 */ | |
6823645d | 1598 | nf_ct_unexpect_related(exp); |
601e68e1 | 1599 | /* have to put what we 'get' above. |
c1d10adb | 1600 | * after this line usage count == 0 */ |
6823645d | 1601 | nf_ct_expect_put(exp); |
df6fb868 PM |
1602 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1603 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1604 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1605 | |
1606 | /* delete all expectations for this helper */ | |
f8ba1aff | 1607 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1608 | h = __nf_conntrack_helper_find_byname(name); |
1609 | if (!h) { | |
f8ba1aff | 1610 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1611 | return -EINVAL; |
1612 | } | |
31f15875 PM |
1613 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1614 | hlist_for_each_entry_safe(exp, n, next, | |
1615 | &nf_ct_expect_hash[i], | |
1616 | hnode) { | |
1617 | m_help = nfct_help(exp->master); | |
1618 | if (m_help->helper == h | |
1619 | && del_timer(&exp->timeout)) { | |
1620 | nf_ct_unlink_expect(exp); | |
1621 | nf_ct_expect_put(exp); | |
1622 | } | |
c1d10adb PNA |
1623 | } |
1624 | } | |
f8ba1aff | 1625 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1626 | } else { |
1627 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1628 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1629 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1630 | hlist_for_each_entry_safe(exp, n, next, | |
1631 | &nf_ct_expect_hash[i], | |
1632 | hnode) { | |
1633 | if (del_timer(&exp->timeout)) { | |
1634 | nf_ct_unlink_expect(exp); | |
1635 | nf_ct_expect_put(exp); | |
1636 | } | |
c1d10adb PNA |
1637 | } |
1638 | } | |
f8ba1aff | 1639 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1640 | } |
1641 | ||
1642 | return 0; | |
1643 | } | |
1644 | static int | |
df6fb868 | 1645 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1646 | { |
1647 | return -EOPNOTSUPP; | |
1648 | } | |
1649 | ||
1650 | static int | |
df6fb868 | 1651 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) |
c1d10adb PNA |
1652 | { |
1653 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1654 | struct nf_conntrack_tuple_hash *h = NULL; | |
1655 | struct nf_conntrack_expect *exp; | |
1656 | struct nf_conn *ct; | |
dc808fe2 | 1657 | struct nf_conn_help *help; |
c1d10adb PNA |
1658 | int err = 0; |
1659 | ||
c1d10adb PNA |
1660 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1661 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1662 | if (err < 0) | |
1663 | return err; | |
1664 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1665 | if (err < 0) | |
1666 | return err; | |
1667 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1668 | if (err < 0) | |
1669 | return err; | |
1670 | ||
1671 | /* Look for master conntrack of this expectation */ | |
330f7db5 | 1672 | h = nf_conntrack_find_get(&master_tuple); |
c1d10adb PNA |
1673 | if (!h) |
1674 | return -ENOENT; | |
1675 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1676 | help = nfct_help(ct); |
c1d10adb | 1677 | |
dc808fe2 | 1678 | if (!help || !help->helper) { |
c1d10adb PNA |
1679 | /* such conntrack hasn't got any helper, abort */ |
1680 | err = -EINVAL; | |
1681 | goto out; | |
1682 | } | |
1683 | ||
6823645d | 1684 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1685 | if (!exp) { |
1686 | err = -ENOMEM; | |
1687 | goto out; | |
1688 | } | |
601e68e1 | 1689 | |
c1d10adb PNA |
1690 | exp->expectfn = NULL; |
1691 | exp->flags = 0; | |
1692 | exp->master = ct; | |
9457d851 | 1693 | exp->helper = NULL; |
c1d10adb | 1694 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1695 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1696 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1697 | |
6823645d PM |
1698 | err = nf_ct_expect_related(exp); |
1699 | nf_ct_expect_put(exp); | |
c1d10adb | 1700 | |
601e68e1 | 1701 | out: |
c1d10adb PNA |
1702 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1703 | return err; | |
1704 | } | |
1705 | ||
1706 | static int | |
1707 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1708 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1709 | { |
1710 | struct nf_conntrack_tuple tuple; | |
1711 | struct nf_conntrack_expect *exp; | |
1712 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1713 | u_int8_t u3 = nfmsg->nfgen_family; | |
1714 | int err = 0; | |
1715 | ||
df6fb868 PM |
1716 | if (!cda[CTA_EXPECT_TUPLE] |
1717 | || !cda[CTA_EXPECT_MASK] | |
1718 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1719 | return -EINVAL; |
1720 | ||
1721 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1722 | if (err < 0) | |
1723 | return err; | |
1724 | ||
f8ba1aff | 1725 | spin_lock_bh(&nf_conntrack_lock); |
6823645d | 1726 | exp = __nf_ct_expect_find(&tuple); |
c1d10adb PNA |
1727 | |
1728 | if (!exp) { | |
f8ba1aff | 1729 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1730 | err = -ENOENT; |
1731 | if (nlh->nlmsg_flags & NLM_F_CREATE) | |
1732 | err = ctnetlink_create_expect(cda, u3); | |
1733 | return err; | |
1734 | } | |
1735 | ||
1736 | err = -EEXIST; | |
1737 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1738 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1739 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1740 | |
c1d10adb PNA |
1741 | return err; |
1742 | } | |
1743 | ||
1744 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1745 | static struct notifier_block ctnl_notifier = { | |
1746 | .notifier_call = ctnetlink_conntrack_event, | |
1747 | }; | |
1748 | ||
1749 | static struct notifier_block ctnl_notifier_exp = { | |
1750 | .notifier_call = ctnetlink_expect_event, | |
1751 | }; | |
1752 | #endif | |
1753 | ||
7c8d4cb4 | 1754 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1755 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1756 | .attr_count = CTA_MAX, |
1757 | .policy = ct_nla_policy }, | |
c1d10adb | 1758 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1759 | .attr_count = CTA_MAX, |
1760 | .policy = ct_nla_policy }, | |
c1d10adb | 1761 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1762 | .attr_count = CTA_MAX, |
1763 | .policy = ct_nla_policy }, | |
c1d10adb | 1764 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1765 | .attr_count = CTA_MAX, |
1766 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1767 | }; |
1768 | ||
7c8d4cb4 | 1769 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1770 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1771 | .attr_count = CTA_EXPECT_MAX, |
1772 | .policy = exp_nla_policy }, | |
c1d10adb | 1773 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1774 | .attr_count = CTA_EXPECT_MAX, |
1775 | .policy = exp_nla_policy }, | |
c1d10adb | 1776 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1777 | .attr_count = CTA_EXPECT_MAX, |
1778 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1779 | }; |
1780 | ||
7c8d4cb4 | 1781 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1782 | .name = "conntrack", |
1783 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1784 | .cb_count = IPCTNL_MSG_MAX, | |
1785 | .cb = ctnl_cb, | |
1786 | }; | |
1787 | ||
7c8d4cb4 | 1788 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1789 | .name = "conntrack_expect", |
1790 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1791 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1792 | .cb = ctnl_exp_cb, | |
1793 | }; | |
1794 | ||
d2483dde | 1795 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1796 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1797 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1798 | |
1799 | static int __init ctnetlink_init(void) | |
1800 | { | |
1801 | int ret; | |
1802 | ||
1803 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1804 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1805 | if (ret < 0) { | |
1806 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1807 | goto err_out; | |
1808 | } | |
1809 | ||
1810 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1811 | if (ret < 0) { | |
1812 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1813 | goto err_unreg_subsys; | |
1814 | } | |
1815 | ||
1816 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1817 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1818 | if (ret < 0) { | |
1819 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1820 | goto err_unreg_exp_subsys; | |
1821 | } | |
1822 | ||
6823645d | 1823 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1824 | if (ret < 0) { |
1825 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1826 | goto err_unreg_notifier; | |
1827 | } | |
1828 | #endif | |
1829 | ||
1830 | return 0; | |
1831 | ||
1832 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1833 | err_unreg_notifier: | |
1834 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1835 | err_unreg_exp_subsys: | |
1836 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1837 | #endif | |
1838 | err_unreg_subsys: | |
1839 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1840 | err_out: | |
1841 | return ret; | |
1842 | } | |
1843 | ||
1844 | static void __exit ctnetlink_exit(void) | |
1845 | { | |
1846 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1847 | ||
1848 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1849 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1850 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1851 | #endif | |
1852 | ||
1853 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1854 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1855 | return; | |
1856 | } | |
1857 | ||
1858 | module_init(ctnetlink_init); | |
1859 | module_exit(ctnetlink_exit); |