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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 | |
7b621c1e PNA |
475 | if (events & IPCT_DESTROY) { |
476 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
477 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 478 | goto nla_put_failure; |
7b621c1e PNA |
479 | } else { |
480 | if (ctnetlink_dump_status(skb, ct) < 0) | |
df6fb868 | 481 | goto nla_put_failure; |
7b621c1e PNA |
482 | |
483 | if (ctnetlink_dump_timeout(skb, ct) < 0) | |
df6fb868 | 484 | goto nla_put_failure; |
7b621c1e PNA |
485 | |
486 | if (events & IPCT_PROTOINFO | |
487 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 488 | goto nla_put_failure; |
7b621c1e PNA |
489 | |
490 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
491 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 492 | goto nla_put_failure; |
7b621c1e | 493 | |
37fccd85 PNA |
494 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
495 | if ((events & IPCT_SECMARK || ct->secmark) | |
496 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
497 | goto nla_put_failure; | |
498 | #endif | |
7b621c1e PNA |
499 | |
500 | if (events & IPCT_COUNTER_FILLING && | |
501 | (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
502 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)) | |
df6fb868 | 503 | goto nla_put_failure; |
13eae15a | 504 | |
0f417ce9 PNA |
505 | if (events & IPCT_RELATED && |
506 | ctnetlink_dump_master(skb, ct) < 0) | |
507 | goto nla_put_failure; | |
508 | ||
13eae15a PNA |
509 | if (events & IPCT_NATSEQADJ && |
510 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
511 | goto nla_put_failure; | |
7b621c1e | 512 | } |
b9a37e0c | 513 | |
a83099a6 EL |
514 | #ifdef CONFIG_NF_CONNTRACK_MARK |
515 | if ((events & IPCT_MARK || ct->mark) | |
516 | && ctnetlink_dump_mark(skb, ct) < 0) | |
517 | goto nla_put_failure; | |
518 | #endif | |
519 | ||
c1d10adb PNA |
520 | nlh->nlmsg_len = skb->tail - b; |
521 | nfnetlink_send(skb, 0, group, 0); | |
522 | return NOTIFY_DONE; | |
523 | ||
524 | nlmsg_failure: | |
df6fb868 | 525 | nla_put_failure: |
c1d10adb PNA |
526 | kfree_skb(skb); |
527 | return NOTIFY_DONE; | |
528 | } | |
529 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
530 | ||
531 | static int ctnetlink_done(struct netlink_callback *cb) | |
532 | { | |
89f2e218 PM |
533 | if (cb->args[1]) |
534 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
535 | return 0; |
536 | } | |
537 | ||
538 | static int | |
539 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
540 | { | |
89f2e218 | 541 | struct nf_conn *ct, *last; |
c1d10adb | 542 | struct nf_conntrack_tuple_hash *h; |
f205c5e0 | 543 | struct hlist_node *n; |
87711cb8 PNA |
544 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
545 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 546 | |
76507f69 | 547 | rcu_read_lock(); |
d205dc40 | 548 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
549 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
550 | restart: | |
76507f69 PM |
551 | hlist_for_each_entry_rcu(h, n, &nf_conntrack_hash[cb->args[0]], |
552 | hnode) { | |
5b1158e9 | 553 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
554 | continue; |
555 | ct = nf_ct_tuplehash_to_ctrack(h); | |
87711cb8 PNA |
556 | /* Dump entries of a given L3 protocol number. |
557 | * If it is not specified, ie. l3proto == 0, | |
558 | * then dump everything. */ | |
5e8fbe2a | 559 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
87711cb8 | 560 | continue; |
d205dc40 PM |
561 | if (cb->args[1]) { |
562 | if (ct != last) | |
89f2e218 | 563 | continue; |
d205dc40 | 564 | cb->args[1] = 0; |
89f2e218 | 565 | } |
c1d10adb | 566 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 567 | cb->nlh->nlmsg_seq, |
c1d10adb | 568 | IPCTNL_MSG_CT_NEW, |
89f2e218 | 569 | 1, ct) < 0) { |
76507f69 PM |
570 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
571 | continue; | |
89f2e218 | 572 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 573 | goto out; |
89f2e218 | 574 | } |
01f34848 PNA |
575 | #ifdef CONFIG_NF_CT_ACCT |
576 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == | |
577 | IPCTNL_MSG_CT_GET_CTRZERO) | |
578 | memset(&ct->counters, 0, sizeof(ct->counters)); | |
579 | #endif | |
89f2e218 | 580 | } |
d205dc40 | 581 | if (cb->args[1]) { |
89f2e218 PM |
582 | cb->args[1] = 0; |
583 | goto restart; | |
c1d10adb PNA |
584 | } |
585 | } | |
89f2e218 | 586 | out: |
76507f69 | 587 | rcu_read_unlock(); |
d205dc40 PM |
588 | if (last) |
589 | nf_ct_put(last); | |
c1d10adb | 590 | |
c1d10adb PNA |
591 | return skb->len; |
592 | } | |
593 | ||
c1d10adb | 594 | static inline int |
df6fb868 | 595 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 596 | { |
df6fb868 | 597 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
598 | struct nf_conntrack_l3proto *l3proto; |
599 | int ret = 0; | |
600 | ||
df6fb868 | 601 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb PNA |
602 | |
603 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
604 | ||
f73e924c PM |
605 | if (likely(l3proto->nlattr_to_tuple)) { |
606 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
607 | l3proto->nla_policy); | |
608 | if (ret == 0) | |
609 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
610 | } | |
c1d10adb PNA |
611 | |
612 | nf_ct_l3proto_put(l3proto); | |
613 | ||
c1d10adb PNA |
614 | return ret; |
615 | } | |
616 | ||
f73e924c PM |
617 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
618 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
619 | }; |
620 | ||
621 | static inline int | |
df6fb868 | 622 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
623 | struct nf_conntrack_tuple *tuple) |
624 | { | |
df6fb868 | 625 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 626 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
627 | int ret = 0; |
628 | ||
f73e924c PM |
629 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
630 | if (ret < 0) | |
631 | return ret; | |
c1d10adb | 632 | |
df6fb868 | 633 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 634 | return -EINVAL; |
77236b6e | 635 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 636 | |
605dcad6 | 637 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
c1d10adb | 638 | |
f73e924c PM |
639 | if (likely(l4proto->nlattr_to_tuple)) { |
640 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
641 | l4proto->nla_policy); | |
642 | if (ret == 0) | |
643 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
644 | } | |
c1d10adb | 645 | |
605dcad6 | 646 | nf_ct_l4proto_put(l4proto); |
601e68e1 | 647 | |
c1d10adb PNA |
648 | return ret; |
649 | } | |
650 | ||
bb5cf80e | 651 | static int |
df6fb868 | 652 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
653 | enum ctattr_tuple type, u_int8_t l3num) |
654 | { | |
df6fb868 | 655 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
656 | int err; |
657 | ||
c1d10adb PNA |
658 | memset(tuple, 0, sizeof(*tuple)); |
659 | ||
df6fb868 | 660 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 661 | |
df6fb868 | 662 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
663 | return -EINVAL; |
664 | ||
665 | tuple->src.l3num = l3num; | |
666 | ||
df6fb868 | 667 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
668 | if (err < 0) |
669 | return err; | |
670 | ||
df6fb868 | 671 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
672 | return -EINVAL; |
673 | ||
df6fb868 | 674 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
675 | if (err < 0) |
676 | return err; | |
677 | ||
678 | /* orig and expect tuples get DIR_ORIGINAL */ | |
679 | if (type == CTA_TUPLE_REPLY) | |
680 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
681 | else | |
682 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
683 | ||
c1d10adb PNA |
684 | return 0; |
685 | } | |
686 | ||
5b1158e9 | 687 | #ifdef CONFIG_NF_NAT_NEEDED |
f73e924c PM |
688 | static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = { |
689 | [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 }, | |
690 | [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 }, | |
c1d10adb PNA |
691 | }; |
692 | ||
df6fb868 | 693 | static int nfnetlink_parse_nat_proto(struct nlattr *attr, |
c1d10adb | 694 | const struct nf_conn *ct, |
5b1158e9 | 695 | struct nf_nat_range *range) |
c1d10adb | 696 | { |
df6fb868 | 697 | struct nlattr *tb[CTA_PROTONAT_MAX+1]; |
2b628a08 | 698 | const struct nf_nat_protocol *npt; |
f73e924c | 699 | int err; |
c1d10adb | 700 | |
f73e924c PM |
701 | err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy); |
702 | if (err < 0) | |
703 | return err; | |
c1d10adb | 704 | |
5e8fbe2a | 705 | npt = nf_nat_proto_find_get(nf_ct_protonum(ct)); |
ca6a5074 PM |
706 | if (npt->nlattr_to_range) |
707 | err = npt->nlattr_to_range(tb, range); | |
5b1158e9 | 708 | nf_nat_proto_put(npt); |
ca6a5074 | 709 | return err; |
c1d10adb PNA |
710 | } |
711 | ||
f73e924c PM |
712 | static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = { |
713 | [CTA_NAT_MINIP] = { .type = NLA_U32 }, | |
714 | [CTA_NAT_MAXIP] = { .type = NLA_U32 }, | |
c1d10adb PNA |
715 | }; |
716 | ||
717 | static inline int | |
df6fb868 | 718 | nfnetlink_parse_nat(struct nlattr *nat, |
5b1158e9 | 719 | const struct nf_conn *ct, struct nf_nat_range *range) |
c1d10adb | 720 | { |
df6fb868 | 721 | struct nlattr *tb[CTA_NAT_MAX+1]; |
c1d10adb PNA |
722 | int err; |
723 | ||
c1d10adb | 724 | memset(range, 0, sizeof(*range)); |
601e68e1 | 725 | |
f73e924c PM |
726 | err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy); |
727 | if (err < 0) | |
728 | return err; | |
c1d10adb | 729 | |
df6fb868 | 730 | if (tb[CTA_NAT_MINIP]) |
77236b6e | 731 | range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]); |
c1d10adb | 732 | |
df6fb868 | 733 | if (!tb[CTA_NAT_MAXIP]) |
c1d10adb PNA |
734 | range->max_ip = range->min_ip; |
735 | else | |
77236b6e | 736 | range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]); |
c1d10adb PNA |
737 | |
738 | if (range->min_ip) | |
739 | range->flags |= IP_NAT_RANGE_MAP_IPS; | |
740 | ||
df6fb868 | 741 | if (!tb[CTA_NAT_PROTO]) |
c1d10adb PNA |
742 | return 0; |
743 | ||
df6fb868 | 744 | err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range); |
c1d10adb PNA |
745 | if (err < 0) |
746 | return err; | |
747 | ||
c1d10adb PNA |
748 | return 0; |
749 | } | |
750 | #endif | |
751 | ||
752 | static inline int | |
df6fb868 | 753 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 754 | { |
df6fb868 | 755 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 756 | |
df6fb868 | 757 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 758 | |
df6fb868 | 759 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
760 | return -EINVAL; |
761 | ||
df6fb868 | 762 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
763 | |
764 | return 0; | |
765 | } | |
766 | ||
f73e924c PM |
767 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
768 | [CTA_STATUS] = { .type = NLA_U32 }, | |
769 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
770 | [CTA_MARK] = { .type = NLA_U32 }, | |
771 | [CTA_USE] = { .type = NLA_U32 }, | |
772 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
773 | }; |
774 | ||
775 | static int | |
601e68e1 | 776 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 777 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
778 | { |
779 | struct nf_conntrack_tuple_hash *h; | |
780 | struct nf_conntrack_tuple tuple; | |
781 | struct nf_conn *ct; | |
782 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
783 | u_int8_t u3 = nfmsg->nfgen_family; | |
784 | int err = 0; | |
785 | ||
df6fb868 | 786 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 787 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 788 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
789 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
790 | else { | |
791 | /* Flush the whole table */ | |
792 | nf_conntrack_flush(); | |
793 | return 0; | |
794 | } | |
795 | ||
796 | if (err < 0) | |
797 | return err; | |
798 | ||
330f7db5 | 799 | h = nf_conntrack_find_get(&tuple); |
9ea8cfd6 | 800 | if (!h) |
c1d10adb | 801 | return -ENOENT; |
c1d10adb PNA |
802 | |
803 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 804 | |
df6fb868 | 805 | if (cda[CTA_ID]) { |
77236b6e | 806 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 807 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
808 | nf_ct_put(ct); |
809 | return -ENOENT; | |
810 | } | |
601e68e1 | 811 | } |
c1d10adb PNA |
812 | if (del_timer(&ct->timeout)) |
813 | ct->timeout.function((unsigned long)ct); | |
814 | ||
815 | nf_ct_put(ct); | |
c1d10adb PNA |
816 | |
817 | return 0; | |
818 | } | |
819 | ||
820 | static int | |
601e68e1 | 821 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 822 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
823 | { |
824 | struct nf_conntrack_tuple_hash *h; | |
825 | struct nf_conntrack_tuple tuple; | |
826 | struct nf_conn *ct; | |
827 | struct sk_buff *skb2 = NULL; | |
828 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
829 | u_int8_t u3 = nfmsg->nfgen_family; | |
830 | int err = 0; | |
831 | ||
c1d10adb | 832 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
01f34848 PNA |
833 | #ifndef CONFIG_NF_CT_ACCT |
834 | if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO) | |
c1d10adb PNA |
835 | return -ENOTSUPP; |
836 | #endif | |
c702e804 TG |
837 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
838 | ctnetlink_done); | |
c1d10adb PNA |
839 | } |
840 | ||
df6fb868 | 841 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 842 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 843 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
844 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
845 | else | |
846 | return -EINVAL; | |
847 | ||
848 | if (err < 0) | |
849 | return err; | |
850 | ||
330f7db5 | 851 | h = nf_conntrack_find_get(&tuple); |
9ea8cfd6 | 852 | if (!h) |
c1d10adb | 853 | return -ENOENT; |
9ea8cfd6 | 854 | |
c1d10adb PNA |
855 | ct = nf_ct_tuplehash_to_ctrack(h); |
856 | ||
857 | err = -ENOMEM; | |
858 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
859 | if (!skb2) { | |
860 | nf_ct_put(ct); | |
861 | return -ENOMEM; | |
862 | } | |
c1d10adb | 863 | |
601e68e1 | 864 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
c1d10adb PNA |
865 | IPCTNL_MSG_CT_NEW, 1, ct); |
866 | nf_ct_put(ct); | |
867 | if (err <= 0) | |
868 | goto free; | |
869 | ||
870 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
871 | if (err < 0) | |
872 | goto out; | |
873 | ||
c1d10adb PNA |
874 | return 0; |
875 | ||
876 | free: | |
877 | kfree_skb(skb2); | |
878 | out: | |
879 | return err; | |
880 | } | |
881 | ||
bb5cf80e | 882 | static int |
df6fb868 | 883 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
884 | { |
885 | unsigned long d; | |
77236b6e | 886 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
887 | d = ct->status ^ status; |
888 | ||
889 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
890 | /* unchangeable */ | |
891 | return -EINVAL; | |
601e68e1 | 892 | |
c1d10adb PNA |
893 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
894 | /* SEEN_REPLY bit can only be set */ | |
895 | return -EINVAL; | |
896 | ||
601e68e1 | 897 | |
c1d10adb PNA |
898 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
899 | /* ASSURED bit can only be set */ | |
900 | return -EINVAL; | |
901 | ||
df6fb868 | 902 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
5b1158e9 | 903 | #ifndef CONFIG_NF_NAT_NEEDED |
c1d10adb PNA |
904 | return -EINVAL; |
905 | #else | |
5b1158e9 | 906 | struct nf_nat_range range; |
c1d10adb | 907 | |
df6fb868 PM |
908 | if (cda[CTA_NAT_DST]) { |
909 | if (nfnetlink_parse_nat(cda[CTA_NAT_DST], ct, | |
3726add7 PM |
910 | &range) < 0) |
911 | return -EINVAL; | |
cc01dcbd | 912 | if (nf_nat_initialized(ct, IP_NAT_MANIP_DST)) |
3726add7 | 913 | return -EEXIST; |
cc01dcbd | 914 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST); |
3726add7 | 915 | } |
df6fb868 PM |
916 | if (cda[CTA_NAT_SRC]) { |
917 | if (nfnetlink_parse_nat(cda[CTA_NAT_SRC], ct, | |
3726add7 PM |
918 | &range) < 0) |
919 | return -EINVAL; | |
cc01dcbd | 920 | if (nf_nat_initialized(ct, IP_NAT_MANIP_SRC)) |
3726add7 | 921 | return -EEXIST; |
cc01dcbd | 922 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC); |
3726add7 | 923 | } |
c1d10adb PNA |
924 | #endif |
925 | } | |
926 | ||
927 | /* Be careful here, modifying NAT bits can screw up things, | |
928 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 929 | * nf_nat_range. */ |
c1d10adb PNA |
930 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
931 | return 0; | |
932 | } | |
933 | ||
934 | ||
935 | static inline int | |
df6fb868 | 936 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
937 | { |
938 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 939 | struct nf_conn_help *help = nfct_help(ct); |
c1d10adb PNA |
940 | char *helpname; |
941 | int err; | |
942 | ||
c1d10adb PNA |
943 | /* don't change helper of sibling connections */ |
944 | if (ct->master) | |
945 | return -EINVAL; | |
946 | ||
df6fb868 | 947 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
948 | if (err < 0) |
949 | return err; | |
950 | ||
df293bbb YK |
951 | if (!strcmp(helpname, "")) { |
952 | if (help && help->helper) { | |
c1d10adb PNA |
953 | /* we had a helper before ... */ |
954 | nf_ct_remove_expectations(ct); | |
3c158f7f | 955 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 956 | } |
df293bbb YK |
957 | |
958 | return 0; | |
c1d10adb | 959 | } |
601e68e1 | 960 | |
df293bbb YK |
961 | helper = __nf_conntrack_helper_find_byname(helpname); |
962 | if (helper == NULL) | |
963 | return -EINVAL; | |
964 | ||
ceceae1b YK |
965 | if (help) { |
966 | if (help->helper == helper) | |
967 | return 0; | |
968 | if (help->helper) | |
969 | return -EBUSY; | |
970 | /* need to zero data of old helper */ | |
971 | memset(&help->help, 0, sizeof(help->help)); | |
972 | } else { | |
b560580a | 973 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
ceceae1b YK |
974 | if (help == NULL) |
975 | return -ENOMEM; | |
976 | } | |
df293bbb | 977 | |
3c158f7f | 978 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
979 | |
980 | return 0; | |
981 | } | |
982 | ||
983 | static inline int | |
df6fb868 | 984 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 985 | { |
77236b6e | 986 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 987 | |
c1d10adb PNA |
988 | if (!del_timer(&ct->timeout)) |
989 | return -ETIME; | |
990 | ||
991 | ct->timeout.expires = jiffies + timeout * HZ; | |
992 | add_timer(&ct->timeout); | |
993 | ||
994 | return 0; | |
995 | } | |
996 | ||
997 | static inline int | |
df6fb868 | 998 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 999 | { |
df6fb868 | 1000 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 1001 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1002 | int err = 0; |
1003 | ||
df6fb868 | 1004 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 1005 | |
5e8fbe2a | 1006 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
fdf70832 PM |
1007 | if (l4proto->from_nlattr) |
1008 | err = l4proto->from_nlattr(tb, ct); | |
605dcad6 | 1009 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
1010 | |
1011 | return err; | |
1012 | } | |
1013 | ||
13eae15a PNA |
1014 | #ifdef CONFIG_NF_NAT_NEEDED |
1015 | static inline int | |
1016 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1017 | { | |
1018 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1019 | ||
1020 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1021 | ||
1022 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1023 | return -EINVAL; | |
1024 | ||
1025 | natseq->correction_pos = | |
77236b6e | 1026 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1027 | |
1028 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1029 | return -EINVAL; | |
1030 | ||
1031 | natseq->offset_before = | |
77236b6e | 1032 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1033 | |
1034 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1035 | return -EINVAL; | |
1036 | ||
1037 | natseq->offset_after = | |
77236b6e | 1038 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1039 | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static int | |
1044 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1045 | { | |
1046 | int ret = 0; | |
1047 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1048 | ||
1049 | if (!nat) | |
1050 | return 0; | |
1051 | ||
1052 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1053 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1054 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1055 | if (ret < 0) | |
1056 | return ret; | |
1057 | ||
1058 | ct->status |= IPS_SEQ_ADJUST; | |
1059 | } | |
1060 | ||
1061 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1062 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1063 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1064 | if (ret < 0) | |
1065 | return ret; | |
1066 | ||
1067 | ct->status |= IPS_SEQ_ADJUST; | |
1068 | } | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | #endif | |
1073 | ||
c1d10adb | 1074 | static int |
df6fb868 | 1075 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1076 | { |
1077 | int err; | |
1078 | ||
df6fb868 | 1079 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1080 | err = ctnetlink_change_helper(ct, cda); |
1081 | if (err < 0) | |
1082 | return err; | |
1083 | } | |
1084 | ||
df6fb868 | 1085 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1086 | err = ctnetlink_change_timeout(ct, cda); |
1087 | if (err < 0) | |
1088 | return err; | |
1089 | } | |
1090 | ||
df6fb868 | 1091 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1092 | err = ctnetlink_change_status(ct, cda); |
1093 | if (err < 0) | |
1094 | return err; | |
1095 | } | |
1096 | ||
df6fb868 | 1097 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1098 | err = ctnetlink_change_protoinfo(ct, cda); |
1099 | if (err < 0) | |
1100 | return err; | |
1101 | } | |
1102 | ||
bcd1e830 | 1103 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1104 | if (cda[CTA_MARK]) |
77236b6e | 1105 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1106 | #endif |
1107 | ||
13eae15a PNA |
1108 | #ifdef CONFIG_NF_NAT_NEEDED |
1109 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1110 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1111 | if (err < 0) | |
1112 | return err; | |
1113 | } | |
1114 | #endif | |
1115 | ||
c1d10adb PNA |
1116 | return 0; |
1117 | } | |
1118 | ||
1119 | static int | |
df6fb868 | 1120 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1121 | struct nf_conntrack_tuple *otuple, |
5faa1f4c PNA |
1122 | struct nf_conntrack_tuple *rtuple, |
1123 | struct nf_conn *master_ct) | |
c1d10adb PNA |
1124 | { |
1125 | struct nf_conn *ct; | |
1126 | int err = -EINVAL; | |
dafc741c | 1127 | struct nf_conn_help *help; |
ceceae1b | 1128 | struct nf_conntrack_helper *helper; |
c1d10adb | 1129 | |
c1d10adb PNA |
1130 | ct = nf_conntrack_alloc(otuple, rtuple); |
1131 | if (ct == NULL || IS_ERR(ct)) | |
601e68e1 | 1132 | return -ENOMEM; |
c1d10adb | 1133 | |
df6fb868 | 1134 | if (!cda[CTA_TIMEOUT]) |
c1d10adb | 1135 | goto err; |
77236b6e | 1136 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1137 | |
1138 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1139 | ct->status |= IPS_CONFIRMED; | |
1140 | ||
df6fb868 | 1141 | if (cda[CTA_STATUS]) { |
bbb3357d PNA |
1142 | err = ctnetlink_change_status(ct, cda); |
1143 | if (err < 0) | |
1144 | goto err; | |
1145 | } | |
c1d10adb | 1146 | |
df6fb868 | 1147 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1148 | err = ctnetlink_change_protoinfo(ct, cda); |
1149 | if (err < 0) | |
c54ea3b9 | 1150 | goto err; |
c1d10adb PNA |
1151 | } |
1152 | ||
bcd1e830 | 1153 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1154 | if (cda[CTA_MARK]) |
77236b6e | 1155 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1156 | #endif |
1157 | ||
58a3c9bb PM |
1158 | rcu_read_lock(); |
1159 | helper = __nf_ct_helper_find(rtuple); | |
ceceae1b | 1160 | if (helper) { |
b560580a | 1161 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
ceceae1b | 1162 | if (help == NULL) { |
58a3c9bb | 1163 | rcu_read_unlock(); |
ceceae1b YK |
1164 | err = -ENOMEM; |
1165 | goto err; | |
1166 | } | |
3c158f7f PM |
1167 | /* not in hash table yet so not strictly necessary */ |
1168 | rcu_assign_pointer(help->helper, helper); | |
1169 | } | |
dafc741c | 1170 | |
5faa1f4c | 1171 | /* setup master conntrack: this is a confirmed expectation */ |
f2a89004 PNA |
1172 | if (master_ct) { |
1173 | __set_bit(IPS_EXPECTED_BIT, &ct->status); | |
5faa1f4c | 1174 | ct->master = master_ct; |
f2a89004 | 1175 | } |
5faa1f4c | 1176 | |
c1d10adb PNA |
1177 | add_timer(&ct->timeout); |
1178 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1179 | rcu_read_unlock(); |
dafc741c | 1180 | |
c1d10adb PNA |
1181 | return 0; |
1182 | ||
601e68e1 | 1183 | err: |
c1d10adb PNA |
1184 | nf_conntrack_free(ct); |
1185 | return err; | |
1186 | } | |
1187 | ||
601e68e1 YH |
1188 | static int |
1189 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1190 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1191 | { |
1192 | struct nf_conntrack_tuple otuple, rtuple; | |
1193 | struct nf_conntrack_tuple_hash *h = NULL; | |
1194 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1195 | u_int8_t u3 = nfmsg->nfgen_family; | |
1196 | int err = 0; | |
1197 | ||
df6fb868 | 1198 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1199 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1200 | if (err < 0) | |
1201 | return err; | |
1202 | } | |
1203 | ||
df6fb868 | 1204 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1205 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1206 | if (err < 0) | |
1207 | return err; | |
1208 | } | |
1209 | ||
f8ba1aff | 1210 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1211 | if (cda[CTA_TUPLE_ORIG]) |
ba419aff | 1212 | h = __nf_conntrack_find(&otuple); |
df6fb868 | 1213 | else if (cda[CTA_TUPLE_REPLY]) |
ba419aff | 1214 | h = __nf_conntrack_find(&rtuple); |
c1d10adb PNA |
1215 | |
1216 | if (h == NULL) { | |
5faa1f4c PNA |
1217 | struct nf_conntrack_tuple master; |
1218 | struct nf_conntrack_tuple_hash *master_h = NULL; | |
1219 | struct nf_conn *master_ct = NULL; | |
1220 | ||
1221 | if (cda[CTA_TUPLE_MASTER]) { | |
1222 | err = ctnetlink_parse_tuple(cda, | |
1223 | &master, | |
1224 | CTA_TUPLE_MASTER, | |
1225 | u3); | |
1226 | if (err < 0) | |
1d670fdc | 1227 | goto out_unlock; |
5faa1f4c | 1228 | |
ba419aff | 1229 | master_h = __nf_conntrack_find(&master); |
5faa1f4c PNA |
1230 | if (master_h == NULL) { |
1231 | err = -ENOENT; | |
1232 | goto out_unlock; | |
1233 | } | |
1234 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
1235 | atomic_inc(&master_ct->ct_general.use); | |
1236 | } | |
1237 | ||
f8ba1aff | 1238 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1239 | err = -ENOENT; |
1240 | if (nlh->nlmsg_flags & NLM_F_CREATE) | |
5faa1f4c PNA |
1241 | err = ctnetlink_create_conntrack(cda, |
1242 | &otuple, | |
1243 | &rtuple, | |
1244 | master_ct); | |
1245 | if (err < 0 && master_ct) | |
1246 | nf_ct_put(master_ct); | |
1247 | ||
c1d10adb PNA |
1248 | return err; |
1249 | } | |
1250 | /* implicit 'else' */ | |
1251 | ||
c1d10adb PNA |
1252 | /* We manipulate the conntrack inside the global conntrack table lock, |
1253 | * so there's no need to increase the refcount */ | |
c1d10adb | 1254 | err = -EEXIST; |
ff4ca827 PNA |
1255 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
1256 | /* we only allow nat config for new conntracks */ | |
df6fb868 | 1257 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
ff4ca827 PNA |
1258 | err = -EINVAL; |
1259 | goto out_unlock; | |
1260 | } | |
5faa1f4c PNA |
1261 | /* can't link an existing conntrack to a master */ |
1262 | if (cda[CTA_TUPLE_MASTER]) { | |
1263 | err = -EINVAL; | |
1264 | goto out_unlock; | |
1265 | } | |
ff4ca827 PNA |
1266 | err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), |
1267 | cda); | |
1268 | } | |
c1d10adb PNA |
1269 | |
1270 | out_unlock: | |
f8ba1aff | 1271 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1272 | return err; |
1273 | } | |
1274 | ||
601e68e1 YH |
1275 | /*********************************************************************** |
1276 | * EXPECT | |
1277 | ***********************************************************************/ | |
c1d10adb PNA |
1278 | |
1279 | static inline int | |
1280 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1281 | const struct nf_conntrack_tuple *tuple, | |
1282 | enum ctattr_expect type) | |
1283 | { | |
df6fb868 | 1284 | struct nlattr *nest_parms; |
601e68e1 | 1285 | |
df6fb868 PM |
1286 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1287 | if (!nest_parms) | |
1288 | goto nla_put_failure; | |
c1d10adb | 1289 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1290 | goto nla_put_failure; |
1291 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1292 | |
1293 | return 0; | |
1294 | ||
df6fb868 | 1295 | nla_put_failure: |
c1d10adb | 1296 | return -1; |
601e68e1 | 1297 | } |
c1d10adb | 1298 | |
1cde6436 PNA |
1299 | static inline int |
1300 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1301 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1302 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1303 | { |
1304 | int ret; | |
1305 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1306 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1307 | struct nf_conntrack_tuple m; |
df6fb868 | 1308 | struct nlattr *nest_parms; |
d4156e8c PM |
1309 | |
1310 | memset(&m, 0xFF, sizeof(m)); | |
1311 | m.src.u.all = mask->src.u.all; | |
1312 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1313 | ||
df6fb868 PM |
1314 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1315 | if (!nest_parms) | |
1316 | goto nla_put_failure; | |
1cde6436 PNA |
1317 | |
1318 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
d4156e8c | 1319 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1320 | nf_ct_l3proto_put(l3proto); |
1321 | ||
1322 | if (unlikely(ret < 0)) | |
df6fb868 | 1323 | goto nla_put_failure; |
1cde6436 | 1324 | |
605dcad6 | 1325 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1326 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
605dcad6 | 1327 | nf_ct_l4proto_put(l4proto); |
1cde6436 | 1328 | if (unlikely(ret < 0)) |
df6fb868 | 1329 | goto nla_put_failure; |
1cde6436 | 1330 | |
df6fb868 | 1331 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1332 | |
1333 | return 0; | |
1334 | ||
df6fb868 | 1335 | nla_put_failure: |
1cde6436 PNA |
1336 | return -1; |
1337 | } | |
1338 | ||
bb5cf80e | 1339 | static int |
c1d10adb | 1340 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1341 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1342 | { |
1343 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1344 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1345 | ||
1346 | if (timeout < 0) | |
1347 | timeout = 0; | |
c1d10adb PNA |
1348 | |
1349 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1350 | goto nla_put_failure; |
1cde6436 | 1351 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1352 | goto nla_put_failure; |
c1d10adb PNA |
1353 | if (ctnetlink_exp_dump_tuple(skb, |
1354 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1355 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1356 | goto nla_put_failure; |
601e68e1 | 1357 | |
d978e5da | 1358 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1359 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1360 | |
1361 | return 0; | |
601e68e1 | 1362 | |
df6fb868 | 1363 | nla_put_failure: |
c1d10adb PNA |
1364 | return -1; |
1365 | } | |
1366 | ||
1367 | static int | |
1368 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 YH |
1369 | int event, |
1370 | int nowait, | |
c1d10adb PNA |
1371 | const struct nf_conntrack_expect *exp) |
1372 | { | |
1373 | struct nlmsghdr *nlh; | |
1374 | struct nfgenmsg *nfmsg; | |
27a884dc | 1375 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1376 | |
1377 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1378 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1379 | nfmsg = NLMSG_DATA(nlh); | |
1380 | ||
1381 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
1382 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1383 | nfmsg->version = NFNETLINK_V0; | |
1384 | nfmsg->res_id = 0; | |
1385 | ||
1386 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1387 | goto nla_put_failure; |
c1d10adb | 1388 | |
27a884dc | 1389 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1390 | return skb->len; |
1391 | ||
1392 | nlmsg_failure: | |
df6fb868 | 1393 | nla_put_failure: |
dc5fc579 | 1394 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1395 | return -1; |
1396 | } | |
1397 | ||
1398 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1399 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1400 | unsigned long events, void *ptr) | |
1401 | { | |
1402 | struct nlmsghdr *nlh; | |
1403 | struct nfgenmsg *nfmsg; | |
1404 | struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr; | |
1405 | struct sk_buff *skb; | |
1406 | unsigned int type; | |
27a884dc | 1407 | sk_buff_data_t b; |
c1d10adb PNA |
1408 | int flags = 0; |
1409 | ||
1410 | if (events & IPEXP_NEW) { | |
1411 | type = IPCTNL_MSG_EXP_NEW; | |
1412 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1413 | } else | |
1414 | return NOTIFY_DONE; | |
1415 | ||
b3a27bfb PNA |
1416 | if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) |
1417 | return NOTIFY_DONE; | |
1418 | ||
c1d10adb PNA |
1419 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1420 | if (!skb) | |
1421 | return NOTIFY_DONE; | |
1422 | ||
1423 | b = skb->tail; | |
1424 | ||
b633ad5f | 1425 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
c1d10adb PNA |
1426 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
1427 | nfmsg = NLMSG_DATA(nlh); | |
1428 | ||
1429 | nlh->nlmsg_flags = flags; | |
1430 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1431 | nfmsg->version = NFNETLINK_V0; | |
1432 | nfmsg->res_id = 0; | |
1433 | ||
1434 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1435 | goto nla_put_failure; |
c1d10adb PNA |
1436 | |
1437 | nlh->nlmsg_len = skb->tail - b; | |
1438 | nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0); | |
1439 | return NOTIFY_DONE; | |
1440 | ||
1441 | nlmsg_failure: | |
df6fb868 | 1442 | nla_put_failure: |
c1d10adb PNA |
1443 | kfree_skb(skb); |
1444 | return NOTIFY_DONE; | |
1445 | } | |
1446 | #endif | |
cf6994c2 PM |
1447 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1448 | { | |
31f15875 PM |
1449 | if (cb->args[1]) |
1450 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1451 | return 0; |
1452 | } | |
c1d10adb PNA |
1453 | |
1454 | static int | |
1455 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1456 | { | |
cf6994c2 | 1457 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1458 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1459 | struct hlist_node *n; |
87711cb8 | 1460 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1461 | |
7d0742da | 1462 | rcu_read_lock(); |
31f15875 PM |
1463 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1464 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1465 | restart: |
31f15875 PM |
1466 | hlist_for_each_entry(exp, n, &nf_ct_expect_hash[cb->args[0]], |
1467 | hnode) { | |
1468 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1469 | continue; |
31f15875 PM |
1470 | if (cb->args[1]) { |
1471 | if (exp != last) | |
1472 | continue; | |
1473 | cb->args[1] = 0; | |
1474 | } | |
1475 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, | |
1476 | cb->nlh->nlmsg_seq, | |
1477 | IPCTNL_MSG_EXP_NEW, | |
1478 | 1, exp) < 0) { | |
7d0742da PM |
1479 | if (!atomic_inc_not_zero(&exp->use)) |
1480 | continue; | |
31f15875 PM |
1481 | cb->args[1] = (unsigned long)exp; |
1482 | goto out; | |
1483 | } | |
cf6994c2 | 1484 | } |
31f15875 PM |
1485 | if (cb->args[1]) { |
1486 | cb->args[1] = 0; | |
1487 | goto restart; | |
cf6994c2 PM |
1488 | } |
1489 | } | |
601e68e1 | 1490 | out: |
7d0742da | 1491 | rcu_read_unlock(); |
cf6994c2 PM |
1492 | if (last) |
1493 | nf_ct_expect_put(last); | |
c1d10adb | 1494 | |
c1d10adb PNA |
1495 | return skb->len; |
1496 | } | |
1497 | ||
f73e924c PM |
1498 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1499 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1500 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1501 | }; |
1502 | ||
1503 | static int | |
601e68e1 | 1504 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1505 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1506 | { |
1507 | struct nf_conntrack_tuple tuple; | |
1508 | struct nf_conntrack_expect *exp; | |
1509 | struct sk_buff *skb2; | |
1510 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1511 | u_int8_t u3 = nfmsg->nfgen_family; | |
1512 | int err = 0; | |
1513 | ||
c1d10adb | 1514 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1515 | return netlink_dump_start(ctnl, skb, nlh, |
1516 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1517 | ctnetlink_exp_done); |
c1d10adb PNA |
1518 | } |
1519 | ||
df6fb868 | 1520 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1521 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1522 | else | |
1523 | return -EINVAL; | |
1524 | ||
1525 | if (err < 0) | |
1526 | return err; | |
1527 | ||
6823645d | 1528 | exp = nf_ct_expect_find_get(&tuple); |
c1d10adb PNA |
1529 | if (!exp) |
1530 | return -ENOENT; | |
1531 | ||
df6fb868 | 1532 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1533 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1534 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1535 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1536 | return -ENOENT; |
1537 | } | |
601e68e1 | 1538 | } |
c1d10adb PNA |
1539 | |
1540 | err = -ENOMEM; | |
1541 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1542 | if (!skb2) | |
1543 | goto out; | |
4e9b8269 | 1544 | |
601e68e1 | 1545 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
c1d10adb PNA |
1546 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
1547 | 1, exp); | |
1548 | if (err <= 0) | |
1549 | goto free; | |
1550 | ||
6823645d | 1551 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1552 | |
1553 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1554 | ||
1555 | free: | |
1556 | kfree_skb(skb2); | |
1557 | out: | |
6823645d | 1558 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1559 | return err; |
1560 | } | |
1561 | ||
1562 | static int | |
601e68e1 | 1563 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1564 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1565 | { |
31f15875 | 1566 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1567 | struct nf_conntrack_tuple tuple; |
1568 | struct nf_conntrack_helper *h; | |
1569 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1570 | struct hlist_node *n, *next; |
c1d10adb | 1571 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1572 | unsigned int i; |
c1d10adb PNA |
1573 | int err; |
1574 | ||
df6fb868 | 1575 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1576 | /* delete a single expect by tuple */ |
1577 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1578 | if (err < 0) | |
1579 | return err; | |
1580 | ||
1581 | /* bump usage count to 2 */ | |
6823645d | 1582 | exp = nf_ct_expect_find_get(&tuple); |
c1d10adb PNA |
1583 | if (!exp) |
1584 | return -ENOENT; | |
1585 | ||
df6fb868 | 1586 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1587 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1588 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1589 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1590 | return -ENOENT; |
1591 | } | |
1592 | } | |
1593 | ||
1594 | /* after list removal, usage count == 1 */ | |
6823645d | 1595 | nf_ct_unexpect_related(exp); |
601e68e1 | 1596 | /* have to put what we 'get' above. |
c1d10adb | 1597 | * after this line usage count == 0 */ |
6823645d | 1598 | nf_ct_expect_put(exp); |
df6fb868 PM |
1599 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1600 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1601 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1602 | |
1603 | /* delete all expectations for this helper */ | |
f8ba1aff | 1604 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1605 | h = __nf_conntrack_helper_find_byname(name); |
1606 | if (!h) { | |
f8ba1aff | 1607 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1608 | return -EINVAL; |
1609 | } | |
31f15875 PM |
1610 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1611 | hlist_for_each_entry_safe(exp, n, next, | |
1612 | &nf_ct_expect_hash[i], | |
1613 | hnode) { | |
1614 | m_help = nfct_help(exp->master); | |
1615 | if (m_help->helper == h | |
1616 | && del_timer(&exp->timeout)) { | |
1617 | nf_ct_unlink_expect(exp); | |
1618 | nf_ct_expect_put(exp); | |
1619 | } | |
c1d10adb PNA |
1620 | } |
1621 | } | |
f8ba1aff | 1622 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1623 | } else { |
1624 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1625 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1626 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1627 | hlist_for_each_entry_safe(exp, n, next, | |
1628 | &nf_ct_expect_hash[i], | |
1629 | hnode) { | |
1630 | if (del_timer(&exp->timeout)) { | |
1631 | nf_ct_unlink_expect(exp); | |
1632 | nf_ct_expect_put(exp); | |
1633 | } | |
c1d10adb PNA |
1634 | } |
1635 | } | |
f8ba1aff | 1636 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1637 | } |
1638 | ||
1639 | return 0; | |
1640 | } | |
1641 | static int | |
df6fb868 | 1642 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1643 | { |
1644 | return -EOPNOTSUPP; | |
1645 | } | |
1646 | ||
1647 | static int | |
df6fb868 | 1648 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) |
c1d10adb PNA |
1649 | { |
1650 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1651 | struct nf_conntrack_tuple_hash *h = NULL; | |
1652 | struct nf_conntrack_expect *exp; | |
1653 | struct nf_conn *ct; | |
dc808fe2 | 1654 | struct nf_conn_help *help; |
c1d10adb PNA |
1655 | int err = 0; |
1656 | ||
c1d10adb PNA |
1657 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1658 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1659 | if (err < 0) | |
1660 | return err; | |
1661 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1662 | if (err < 0) | |
1663 | return err; | |
1664 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1665 | if (err < 0) | |
1666 | return err; | |
1667 | ||
1668 | /* Look for master conntrack of this expectation */ | |
330f7db5 | 1669 | h = nf_conntrack_find_get(&master_tuple); |
c1d10adb PNA |
1670 | if (!h) |
1671 | return -ENOENT; | |
1672 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1673 | help = nfct_help(ct); |
c1d10adb | 1674 | |
dc808fe2 | 1675 | if (!help || !help->helper) { |
c1d10adb PNA |
1676 | /* such conntrack hasn't got any helper, abort */ |
1677 | err = -EINVAL; | |
1678 | goto out; | |
1679 | } | |
1680 | ||
6823645d | 1681 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1682 | if (!exp) { |
1683 | err = -ENOMEM; | |
1684 | goto out; | |
1685 | } | |
601e68e1 | 1686 | |
c1d10adb PNA |
1687 | exp->expectfn = NULL; |
1688 | exp->flags = 0; | |
1689 | exp->master = ct; | |
9457d851 | 1690 | exp->helper = NULL; |
c1d10adb | 1691 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1692 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1693 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1694 | |
6823645d PM |
1695 | err = nf_ct_expect_related(exp); |
1696 | nf_ct_expect_put(exp); | |
c1d10adb | 1697 | |
601e68e1 | 1698 | out: |
c1d10adb PNA |
1699 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1700 | return err; | |
1701 | } | |
1702 | ||
1703 | static int | |
1704 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1705 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1706 | { |
1707 | struct nf_conntrack_tuple tuple; | |
1708 | struct nf_conntrack_expect *exp; | |
1709 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1710 | u_int8_t u3 = nfmsg->nfgen_family; | |
1711 | int err = 0; | |
1712 | ||
df6fb868 PM |
1713 | if (!cda[CTA_EXPECT_TUPLE] |
1714 | || !cda[CTA_EXPECT_MASK] | |
1715 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1716 | return -EINVAL; |
1717 | ||
1718 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1719 | if (err < 0) | |
1720 | return err; | |
1721 | ||
f8ba1aff | 1722 | spin_lock_bh(&nf_conntrack_lock); |
6823645d | 1723 | exp = __nf_ct_expect_find(&tuple); |
c1d10adb PNA |
1724 | |
1725 | if (!exp) { | |
f8ba1aff | 1726 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1727 | err = -ENOENT; |
1728 | if (nlh->nlmsg_flags & NLM_F_CREATE) | |
1729 | err = ctnetlink_create_expect(cda, u3); | |
1730 | return err; | |
1731 | } | |
1732 | ||
1733 | err = -EEXIST; | |
1734 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1735 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1736 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1737 | |
c1d10adb PNA |
1738 | return err; |
1739 | } | |
1740 | ||
1741 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1742 | static struct notifier_block ctnl_notifier = { | |
1743 | .notifier_call = ctnetlink_conntrack_event, | |
1744 | }; | |
1745 | ||
1746 | static struct notifier_block ctnl_notifier_exp = { | |
1747 | .notifier_call = ctnetlink_expect_event, | |
1748 | }; | |
1749 | #endif | |
1750 | ||
7c8d4cb4 | 1751 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1752 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1753 | .attr_count = CTA_MAX, |
1754 | .policy = ct_nla_policy }, | |
c1d10adb | 1755 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1756 | .attr_count = CTA_MAX, |
1757 | .policy = ct_nla_policy }, | |
c1d10adb | 1758 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1759 | .attr_count = CTA_MAX, |
1760 | .policy = ct_nla_policy }, | |
c1d10adb | 1761 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1762 | .attr_count = CTA_MAX, |
1763 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1764 | }; |
1765 | ||
7c8d4cb4 | 1766 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1767 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1768 | .attr_count = CTA_EXPECT_MAX, |
1769 | .policy = exp_nla_policy }, | |
c1d10adb | 1770 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1771 | .attr_count = CTA_EXPECT_MAX, |
1772 | .policy = exp_nla_policy }, | |
c1d10adb | 1773 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1774 | .attr_count = CTA_EXPECT_MAX, |
1775 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1776 | }; |
1777 | ||
7c8d4cb4 | 1778 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1779 | .name = "conntrack", |
1780 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1781 | .cb_count = IPCTNL_MSG_MAX, | |
1782 | .cb = ctnl_cb, | |
1783 | }; | |
1784 | ||
7c8d4cb4 | 1785 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1786 | .name = "conntrack_expect", |
1787 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1788 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1789 | .cb = ctnl_exp_cb, | |
1790 | }; | |
1791 | ||
d2483dde | 1792 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1793 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1794 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1795 | |
1796 | static int __init ctnetlink_init(void) | |
1797 | { | |
1798 | int ret; | |
1799 | ||
1800 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1801 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1802 | if (ret < 0) { | |
1803 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1804 | goto err_out; | |
1805 | } | |
1806 | ||
1807 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1808 | if (ret < 0) { | |
1809 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1810 | goto err_unreg_subsys; | |
1811 | } | |
1812 | ||
1813 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1814 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1815 | if (ret < 0) { | |
1816 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1817 | goto err_unreg_exp_subsys; | |
1818 | } | |
1819 | ||
6823645d | 1820 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1821 | if (ret < 0) { |
1822 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1823 | goto err_unreg_notifier; | |
1824 | } | |
1825 | #endif | |
1826 | ||
1827 | return 0; | |
1828 | ||
1829 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1830 | err_unreg_notifier: | |
1831 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1832 | err_unreg_exp_subsys: | |
1833 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1834 | #endif | |
1835 | err_unreg_subsys: | |
1836 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1837 | err_out: | |
1838 | return ret; | |
1839 | } | |
1840 | ||
1841 | static void __exit ctnetlink_exit(void) | |
1842 | { | |
1843 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1844 | ||
1845 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1846 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1847 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1848 | #endif | |
1849 | ||
1850 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1851 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1852 | return; | |
1853 | } | |
1854 | ||
1855 | module_init(ctnetlink_init); | |
1856 | module_exit(ctnetlink_exit); |