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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> |
0adf9d67 | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
c1d10adb PNA |
22 | #include <linux/types.h> |
23 | #include <linux/timer.h> | |
24 | #include <linux/skbuff.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/netlink.h> | |
27 | #include <linux/spinlock.h> | |
40a839fd | 28 | #include <linux/interrupt.h> |
c1d10adb PNA |
29 | #include <linux/notifier.h> |
30 | ||
31 | #include <linux/netfilter.h> | |
dc5fc579 | 32 | #include <net/netlink.h> |
c1d10adb PNA |
33 | #include <net/netfilter/nf_conntrack.h> |
34 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 35 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
36 | #include <net/netfilter/nf_conntrack_helper.h> |
37 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 38 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 JK |
39 | #include <net/netfilter/nf_conntrack_tuple.h> |
40 | #ifdef CONFIG_NF_NAT_NEEDED | |
41 | #include <net/netfilter/nf_nat_core.h> | |
42 | #include <net/netfilter/nf_nat_protocol.h> | |
43 | #endif | |
c1d10adb PNA |
44 | |
45 | #include <linux/netfilter/nfnetlink.h> | |
46 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
47 | ||
48 | MODULE_LICENSE("GPL"); | |
49 | ||
dc808fe2 | 50 | static char __initdata version[] = "0.93"; |
c1d10adb | 51 | |
c1d10adb | 52 | static inline int |
601e68e1 | 53 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 54 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 55 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 56 | { |
c1d10adb | 57 | int ret = 0; |
df6fb868 | 58 | struct nlattr *nest_parms; |
c1d10adb | 59 | |
df6fb868 PM |
60 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
61 | if (!nest_parms) | |
62 | goto nla_put_failure; | |
77236b6e | 63 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 64 | |
fdf70832 PM |
65 | if (likely(l4proto->tuple_to_nlattr)) |
66 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 67 | |
df6fb868 | 68 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
69 | |
70 | return ret; | |
71 | ||
df6fb868 | 72 | nla_put_failure: |
c1d10adb PNA |
73 | return -1; |
74 | } | |
75 | ||
76 | static inline int | |
1cde6436 PNA |
77 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
78 | const struct nf_conntrack_tuple *tuple, | |
79 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 80 | { |
c1d10adb | 81 | int ret = 0; |
df6fb868 PM |
82 | struct nlattr *nest_parms; |
83 | ||
84 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
85 | if (!nest_parms) | |
86 | goto nla_put_failure; | |
1cde6436 | 87 | |
fdf70832 PM |
88 | if (likely(l3proto->tuple_to_nlattr)) |
89 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 90 | |
df6fb868 | 91 | nla_nest_end(skb, nest_parms); |
c1d10adb | 92 | |
1cde6436 PNA |
93 | return ret; |
94 | ||
df6fb868 | 95 | nla_put_failure: |
1cde6436 PNA |
96 | return -1; |
97 | } | |
98 | ||
bb5cf80e | 99 | static int |
1cde6436 PNA |
100 | ctnetlink_dump_tuples(struct sk_buff *skb, |
101 | const struct nf_conntrack_tuple *tuple) | |
102 | { | |
103 | int ret; | |
104 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 105 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 PNA |
106 | |
107 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
108 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); | |
c1d10adb PNA |
109 | nf_ct_l3proto_put(l3proto); |
110 | ||
111 | if (unlikely(ret < 0)) | |
112 | return ret; | |
113 | ||
605dcad6 MJ |
114 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
115 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); | |
116 | nf_ct_l4proto_put(l4proto); | |
c1d10adb PNA |
117 | |
118 | return ret; | |
c1d10adb PNA |
119 | } |
120 | ||
121 | static inline int | |
122 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
123 | { | |
77236b6e | 124 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
125 | return 0; |
126 | ||
df6fb868 | 127 | nla_put_failure: |
c1d10adb PNA |
128 | return -1; |
129 | } | |
130 | ||
131 | static inline int | |
132 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
133 | { | |
77236b6e | 134 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 135 | |
77236b6e | 136 | if (timeout < 0) |
c1d10adb | 137 | timeout = 0; |
601e68e1 | 138 | |
77236b6e | 139 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
140 | return 0; |
141 | ||
df6fb868 | 142 | nla_put_failure: |
c1d10adb PNA |
143 | return -1; |
144 | } | |
145 | ||
146 | static inline int | |
147 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
148 | { | |
5e8fbe2a | 149 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 150 | struct nlattr *nest_proto; |
c1d10adb PNA |
151 | int ret; |
152 | ||
5e8fbe2a | 153 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
fdf70832 | 154 | if (!l4proto->to_nlattr) { |
605dcad6 | 155 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
156 | return 0; |
157 | } | |
601e68e1 | 158 | |
df6fb868 PM |
159 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
160 | if (!nest_proto) | |
161 | goto nla_put_failure; | |
c1d10adb | 162 | |
fdf70832 | 163 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 164 | |
605dcad6 | 165 | nf_ct_l4proto_put(l4proto); |
c1d10adb | 166 | |
df6fb868 | 167 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
168 | |
169 | return ret; | |
170 | ||
df6fb868 | 171 | nla_put_failure: |
605dcad6 | 172 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
173 | return -1; |
174 | } | |
175 | ||
176 | static inline int | |
177 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
178 | { | |
df6fb868 | 179 | struct nlattr *nest_helper; |
dc808fe2 | 180 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 181 | struct nf_conntrack_helper *helper; |
c1d10adb | 182 | |
3c158f7f | 183 | if (!help) |
c1d10adb | 184 | return 0; |
601e68e1 | 185 | |
3c158f7f PM |
186 | rcu_read_lock(); |
187 | helper = rcu_dereference(help->helper); | |
188 | if (!helper) | |
189 | goto out; | |
190 | ||
df6fb868 PM |
191 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
192 | if (!nest_helper) | |
193 | goto nla_put_failure; | |
77236b6e | 194 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 195 | |
fdf70832 PM |
196 | if (helper->to_nlattr) |
197 | helper->to_nlattr(skb, ct); | |
c1d10adb | 198 | |
df6fb868 | 199 | nla_nest_end(skb, nest_helper); |
3c158f7f PM |
200 | out: |
201 | rcu_read_unlock(); | |
c1d10adb PNA |
202 | return 0; |
203 | ||
df6fb868 | 204 | nla_put_failure: |
3c158f7f | 205 | rcu_read_unlock(); |
c1d10adb PNA |
206 | return -1; |
207 | } | |
208 | ||
209 | #ifdef CONFIG_NF_CT_ACCT | |
bb5cf80e | 210 | static int |
c1d10adb PNA |
211 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
212 | enum ip_conntrack_dir dir) | |
213 | { | |
214 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 215 | struct nlattr *nest_count; |
c1d10adb | 216 | |
df6fb868 PM |
217 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
218 | if (!nest_count) | |
219 | goto nla_put_failure; | |
220 | ||
77236b6e PM |
221 | NLA_PUT_BE32(skb, CTA_COUNTERS32_PACKETS, |
222 | htonl(ct->counters[dir].packets)); | |
223 | NLA_PUT_BE32(skb, CTA_COUNTERS32_BYTES, | |
224 | htonl(ct->counters[dir].bytes)); | |
c1d10adb | 225 | |
df6fb868 | 226 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
227 | |
228 | return 0; | |
229 | ||
df6fb868 | 230 | nla_put_failure: |
c1d10adb PNA |
231 | return -1; |
232 | } | |
233 | #else | |
234 | #define ctnetlink_dump_counters(a, b, c) (0) | |
235 | #endif | |
236 | ||
237 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
238 | static inline int | |
239 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
240 | { | |
77236b6e | 241 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
242 | return 0; |
243 | ||
df6fb868 | 244 | nla_put_failure: |
c1d10adb PNA |
245 | return -1; |
246 | } | |
247 | #else | |
248 | #define ctnetlink_dump_mark(a, b) (0) | |
249 | #endif | |
250 | ||
37fccd85 PNA |
251 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
252 | static inline int | |
253 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
254 | { | |
77236b6e | 255 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
256 | return 0; |
257 | ||
258 | nla_put_failure: | |
259 | return -1; | |
260 | } | |
261 | #else | |
262 | #define ctnetlink_dump_secmark(a, b) (0) | |
263 | #endif | |
264 | ||
0f417ce9 PNA |
265 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
266 | ||
267 | static inline int | |
268 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
269 | { | |
270 | struct nlattr *nest_parms; | |
271 | ||
272 | if (!(ct->status & IPS_EXPECTED)) | |
273 | return 0; | |
274 | ||
275 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
276 | if (!nest_parms) | |
277 | goto nla_put_failure; | |
278 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
279 | goto nla_put_failure; | |
280 | nla_nest_end(skb, nest_parms); | |
281 | ||
282 | return 0; | |
283 | ||
284 | nla_put_failure: | |
285 | return -1; | |
286 | } | |
287 | ||
13eae15a | 288 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 289 | static int |
13eae15a PNA |
290 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
291 | { | |
13eae15a PNA |
292 | struct nlattr *nest_parms; |
293 | ||
294 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
295 | if (!nest_parms) | |
296 | goto nla_put_failure; | |
297 | ||
77236b6e PM |
298 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
299 | htonl(natseq->correction_pos)); | |
300 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
301 | htonl(natseq->offset_before)); | |
302 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
303 | htonl(natseq->offset_after)); | |
13eae15a PNA |
304 | |
305 | nla_nest_end(skb, nest_parms); | |
306 | ||
307 | return 0; | |
308 | ||
309 | nla_put_failure: | |
310 | return -1; | |
311 | } | |
312 | ||
313 | static inline int | |
314 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
315 | { | |
316 | struct nf_nat_seq *natseq; | |
317 | struct nf_conn_nat *nat = nfct_nat(ct); | |
318 | ||
319 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
320 | return 0; | |
321 | ||
322 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
323 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
324 | return -1; | |
325 | ||
326 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
327 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
328 | return -1; | |
329 | ||
330 | return 0; | |
331 | } | |
332 | #else | |
333 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
334 | #endif | |
335 | ||
c1d10adb PNA |
336 | static inline int |
337 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
338 | { | |
77236b6e | 339 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
340 | return 0; |
341 | ||
df6fb868 | 342 | nla_put_failure: |
c1d10adb PNA |
343 | return -1; |
344 | } | |
345 | ||
346 | static inline int | |
347 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
348 | { | |
77236b6e | 349 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
350 | return 0; |
351 | ||
df6fb868 | 352 | nla_put_failure: |
c1d10adb PNA |
353 | return -1; |
354 | } | |
355 | ||
356 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) | |
357 | ||
358 | static int | |
359 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 | 360 | int event, int nowait, |
c1d10adb PNA |
361 | const struct nf_conn *ct) |
362 | { | |
363 | struct nlmsghdr *nlh; | |
364 | struct nfgenmsg *nfmsg; | |
df6fb868 | 365 | struct nlattr *nest_parms; |
27a884dc | 366 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
367 | |
368 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
369 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
370 | nfmsg = NLMSG_DATA(nlh); | |
371 | ||
372 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
5e8fbe2a | 373 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
374 | nfmsg->version = NFNETLINK_V0; |
375 | nfmsg->res_id = 0; | |
376 | ||
df6fb868 PM |
377 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
378 | if (!nest_parms) | |
379 | goto nla_put_failure; | |
c1d10adb | 380 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
381 | goto nla_put_failure; |
382 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 383 | |
df6fb868 PM |
384 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
385 | if (!nest_parms) | |
386 | goto nla_put_failure; | |
c1d10adb | 387 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
388 | goto nla_put_failure; |
389 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
390 | |
391 | if (ctnetlink_dump_status(skb, ct) < 0 || | |
392 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
393 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
394 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
395 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
396 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
397 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 398 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 399 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 400 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 401 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 402 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 403 | goto nla_put_failure; |
c1d10adb | 404 | |
27a884dc | 405 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
406 | return skb->len; |
407 | ||
408 | nlmsg_failure: | |
df6fb868 | 409 | nla_put_failure: |
dc5fc579 | 410 | nlmsg_trim(skb, b); |
c1d10adb PNA |
411 | return -1; |
412 | } | |
413 | ||
414 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
415 | static int ctnetlink_conntrack_event(struct notifier_block *this, | |
601e68e1 | 416 | unsigned long events, void *ptr) |
c1d10adb PNA |
417 | { |
418 | struct nlmsghdr *nlh; | |
419 | struct nfgenmsg *nfmsg; | |
df6fb868 | 420 | struct nlattr *nest_parms; |
c1d10adb PNA |
421 | struct nf_conn *ct = (struct nf_conn *)ptr; |
422 | struct sk_buff *skb; | |
423 | unsigned int type; | |
27a884dc | 424 | sk_buff_data_t b; |
c1d10adb PNA |
425 | unsigned int flags = 0, group; |
426 | ||
427 | /* ignore our fake conntrack entry */ | |
428 | if (ct == &nf_conntrack_untracked) | |
429 | return NOTIFY_DONE; | |
430 | ||
431 | if (events & IPCT_DESTROY) { | |
432 | type = IPCTNL_MSG_CT_DELETE; | |
433 | group = NFNLGRP_CONNTRACK_DESTROY; | |
434 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { | |
435 | type = IPCTNL_MSG_CT_NEW; | |
436 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 437 | group = NFNLGRP_CONNTRACK_NEW; |
1a31526b | 438 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
c1d10adb PNA |
439 | type = IPCTNL_MSG_CT_NEW; |
440 | group = NFNLGRP_CONNTRACK_UPDATE; | |
441 | } else | |
442 | return NOTIFY_DONE; | |
a2427692 PM |
443 | |
444 | if (!nfnetlink_has_listeners(group)) | |
445 | return NOTIFY_DONE; | |
446 | ||
c1d10adb PNA |
447 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
448 | if (!skb) | |
449 | return NOTIFY_DONE; | |
450 | ||
451 | b = skb->tail; | |
452 | ||
453 | type |= NFNL_SUBSYS_CTNETLINK << 8; | |
454 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); | |
455 | nfmsg = NLMSG_DATA(nlh); | |
456 | ||
457 | nlh->nlmsg_flags = flags; | |
5e8fbe2a | 458 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
459 | nfmsg->version = NFNETLINK_V0; |
460 | nfmsg->res_id = 0; | |
461 | ||
df6fb868 PM |
462 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
463 | if (!nest_parms) | |
464 | goto nla_put_failure; | |
c1d10adb | 465 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
466 | goto nla_put_failure; |
467 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 468 | |
df6fb868 PM |
469 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
470 | if (!nest_parms) | |
471 | goto nla_put_failure; | |
c1d10adb | 472 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
473 | goto nla_put_failure; |
474 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 475 | |
1eedf699 EL |
476 | if (ctnetlink_dump_id(skb, ct) < 0) |
477 | goto nla_put_failure; | |
478 | ||
e57dce60 FH |
479 | if (ctnetlink_dump_status(skb, ct) < 0) |
480 | goto nla_put_failure; | |
481 | ||
7b621c1e PNA |
482 | if (events & IPCT_DESTROY) { |
483 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
484 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 485 | goto nla_put_failure; |
7b621c1e | 486 | } else { |
7b621c1e | 487 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 488 | goto nla_put_failure; |
7b621c1e PNA |
489 | |
490 | if (events & IPCT_PROTOINFO | |
491 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 492 | goto nla_put_failure; |
7b621c1e PNA |
493 | |
494 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
495 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 496 | goto nla_put_failure; |
7b621c1e | 497 | |
37fccd85 PNA |
498 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
499 | if ((events & IPCT_SECMARK || ct->secmark) | |
500 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
501 | goto nla_put_failure; | |
502 | #endif | |
7b621c1e PNA |
503 | |
504 | if (events & IPCT_COUNTER_FILLING && | |
505 | (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
506 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)) | |
df6fb868 | 507 | goto nla_put_failure; |
13eae15a | 508 | |
0f417ce9 PNA |
509 | if (events & IPCT_RELATED && |
510 | ctnetlink_dump_master(skb, ct) < 0) | |
511 | goto nla_put_failure; | |
512 | ||
13eae15a PNA |
513 | if (events & IPCT_NATSEQADJ && |
514 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
515 | goto nla_put_failure; | |
7b621c1e | 516 | } |
b9a37e0c | 517 | |
a83099a6 EL |
518 | #ifdef CONFIG_NF_CONNTRACK_MARK |
519 | if ((events & IPCT_MARK || ct->mark) | |
520 | && ctnetlink_dump_mark(skb, ct) < 0) | |
521 | goto nla_put_failure; | |
522 | #endif | |
523 | ||
c1d10adb PNA |
524 | nlh->nlmsg_len = skb->tail - b; |
525 | nfnetlink_send(skb, 0, group, 0); | |
526 | return NOTIFY_DONE; | |
527 | ||
528 | nlmsg_failure: | |
df6fb868 | 529 | nla_put_failure: |
c1d10adb PNA |
530 | kfree_skb(skb); |
531 | return NOTIFY_DONE; | |
532 | } | |
533 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
534 | ||
535 | static int ctnetlink_done(struct netlink_callback *cb) | |
536 | { | |
89f2e218 PM |
537 | if (cb->args[1]) |
538 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
539 | return 0; |
540 | } | |
541 | ||
542 | static int | |
543 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
544 | { | |
89f2e218 | 545 | struct nf_conn *ct, *last; |
c1d10adb | 546 | struct nf_conntrack_tuple_hash *h; |
f205c5e0 | 547 | struct hlist_node *n; |
87711cb8 PNA |
548 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
549 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 550 | |
76507f69 | 551 | rcu_read_lock(); |
d205dc40 | 552 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
553 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
554 | restart: | |
76507f69 PM |
555 | hlist_for_each_entry_rcu(h, n, &nf_conntrack_hash[cb->args[0]], |
556 | hnode) { | |
5b1158e9 | 557 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
558 | continue; |
559 | ct = nf_ct_tuplehash_to_ctrack(h); | |
87711cb8 PNA |
560 | /* Dump entries of a given L3 protocol number. |
561 | * If it is not specified, ie. l3proto == 0, | |
562 | * then dump everything. */ | |
5e8fbe2a | 563 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
87711cb8 | 564 | continue; |
d205dc40 PM |
565 | if (cb->args[1]) { |
566 | if (ct != last) | |
89f2e218 | 567 | continue; |
d205dc40 | 568 | cb->args[1] = 0; |
89f2e218 | 569 | } |
c1d10adb | 570 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 571 | cb->nlh->nlmsg_seq, |
c1d10adb | 572 | IPCTNL_MSG_CT_NEW, |
89f2e218 | 573 | 1, ct) < 0) { |
76507f69 PM |
574 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
575 | continue; | |
89f2e218 | 576 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 577 | goto out; |
89f2e218 | 578 | } |
01f34848 PNA |
579 | #ifdef CONFIG_NF_CT_ACCT |
580 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == | |
581 | IPCTNL_MSG_CT_GET_CTRZERO) | |
582 | memset(&ct->counters, 0, sizeof(ct->counters)); | |
583 | #endif | |
89f2e218 | 584 | } |
d205dc40 | 585 | if (cb->args[1]) { |
89f2e218 PM |
586 | cb->args[1] = 0; |
587 | goto restart; | |
c1d10adb PNA |
588 | } |
589 | } | |
89f2e218 | 590 | out: |
76507f69 | 591 | rcu_read_unlock(); |
d205dc40 PM |
592 | if (last) |
593 | nf_ct_put(last); | |
c1d10adb | 594 | |
c1d10adb PNA |
595 | return skb->len; |
596 | } | |
597 | ||
c1d10adb | 598 | static inline int |
df6fb868 | 599 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 600 | { |
df6fb868 | 601 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
602 | struct nf_conntrack_l3proto *l3proto; |
603 | int ret = 0; | |
604 | ||
df6fb868 | 605 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb PNA |
606 | |
607 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
608 | ||
f73e924c PM |
609 | if (likely(l3proto->nlattr_to_tuple)) { |
610 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
611 | l3proto->nla_policy); | |
612 | if (ret == 0) | |
613 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
614 | } | |
c1d10adb PNA |
615 | |
616 | nf_ct_l3proto_put(l3proto); | |
617 | ||
c1d10adb PNA |
618 | return ret; |
619 | } | |
620 | ||
f73e924c PM |
621 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
622 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
623 | }; |
624 | ||
625 | static inline int | |
df6fb868 | 626 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
627 | struct nf_conntrack_tuple *tuple) |
628 | { | |
df6fb868 | 629 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 630 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
631 | int ret = 0; |
632 | ||
f73e924c PM |
633 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
634 | if (ret < 0) | |
635 | return ret; | |
c1d10adb | 636 | |
df6fb868 | 637 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 638 | return -EINVAL; |
77236b6e | 639 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 640 | |
605dcad6 | 641 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
c1d10adb | 642 | |
f73e924c PM |
643 | if (likely(l4proto->nlattr_to_tuple)) { |
644 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
645 | l4proto->nla_policy); | |
646 | if (ret == 0) | |
647 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
648 | } | |
c1d10adb | 649 | |
605dcad6 | 650 | nf_ct_l4proto_put(l4proto); |
601e68e1 | 651 | |
c1d10adb PNA |
652 | return ret; |
653 | } | |
654 | ||
bb5cf80e | 655 | static int |
df6fb868 | 656 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
657 | enum ctattr_tuple type, u_int8_t l3num) |
658 | { | |
df6fb868 | 659 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
660 | int err; |
661 | ||
c1d10adb PNA |
662 | memset(tuple, 0, sizeof(*tuple)); |
663 | ||
df6fb868 | 664 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 665 | |
df6fb868 | 666 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
667 | return -EINVAL; |
668 | ||
669 | tuple->src.l3num = l3num; | |
670 | ||
df6fb868 | 671 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
672 | if (err < 0) |
673 | return err; | |
674 | ||
df6fb868 | 675 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
676 | return -EINVAL; |
677 | ||
df6fb868 | 678 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
679 | if (err < 0) |
680 | return err; | |
681 | ||
682 | /* orig and expect tuples get DIR_ORIGINAL */ | |
683 | if (type == CTA_TUPLE_REPLY) | |
684 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
685 | else | |
686 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
687 | ||
c1d10adb PNA |
688 | return 0; |
689 | } | |
690 | ||
5b1158e9 | 691 | #ifdef CONFIG_NF_NAT_NEEDED |
f73e924c PM |
692 | static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = { |
693 | [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 }, | |
694 | [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 }, | |
c1d10adb PNA |
695 | }; |
696 | ||
df6fb868 | 697 | static int nfnetlink_parse_nat_proto(struct nlattr *attr, |
c1d10adb | 698 | const struct nf_conn *ct, |
5b1158e9 | 699 | struct nf_nat_range *range) |
c1d10adb | 700 | { |
df6fb868 | 701 | struct nlattr *tb[CTA_PROTONAT_MAX+1]; |
2b628a08 | 702 | const struct nf_nat_protocol *npt; |
f73e924c | 703 | int err; |
c1d10adb | 704 | |
f73e924c PM |
705 | err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy); |
706 | if (err < 0) | |
707 | return err; | |
c1d10adb | 708 | |
5e8fbe2a | 709 | npt = nf_nat_proto_find_get(nf_ct_protonum(ct)); |
ca6a5074 PM |
710 | if (npt->nlattr_to_range) |
711 | err = npt->nlattr_to_range(tb, range); | |
5b1158e9 | 712 | nf_nat_proto_put(npt); |
ca6a5074 | 713 | return err; |
c1d10adb PNA |
714 | } |
715 | ||
f73e924c PM |
716 | static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = { |
717 | [CTA_NAT_MINIP] = { .type = NLA_U32 }, | |
718 | [CTA_NAT_MAXIP] = { .type = NLA_U32 }, | |
c1d10adb PNA |
719 | }; |
720 | ||
721 | static inline int | |
df6fb868 | 722 | nfnetlink_parse_nat(struct nlattr *nat, |
5b1158e9 | 723 | const struct nf_conn *ct, struct nf_nat_range *range) |
c1d10adb | 724 | { |
df6fb868 | 725 | struct nlattr *tb[CTA_NAT_MAX+1]; |
c1d10adb PNA |
726 | int err; |
727 | ||
c1d10adb | 728 | memset(range, 0, sizeof(*range)); |
601e68e1 | 729 | |
f73e924c PM |
730 | err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy); |
731 | if (err < 0) | |
732 | return err; | |
c1d10adb | 733 | |
df6fb868 | 734 | if (tb[CTA_NAT_MINIP]) |
77236b6e | 735 | range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]); |
c1d10adb | 736 | |
df6fb868 | 737 | if (!tb[CTA_NAT_MAXIP]) |
c1d10adb PNA |
738 | range->max_ip = range->min_ip; |
739 | else | |
77236b6e | 740 | range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]); |
c1d10adb PNA |
741 | |
742 | if (range->min_ip) | |
743 | range->flags |= IP_NAT_RANGE_MAP_IPS; | |
744 | ||
df6fb868 | 745 | if (!tb[CTA_NAT_PROTO]) |
c1d10adb PNA |
746 | return 0; |
747 | ||
df6fb868 | 748 | err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range); |
c1d10adb PNA |
749 | if (err < 0) |
750 | return err; | |
751 | ||
c1d10adb PNA |
752 | return 0; |
753 | } | |
754 | #endif | |
755 | ||
756 | static inline int | |
df6fb868 | 757 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 758 | { |
df6fb868 | 759 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 760 | |
df6fb868 | 761 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 762 | |
df6fb868 | 763 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
764 | return -EINVAL; |
765 | ||
df6fb868 | 766 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
767 | |
768 | return 0; | |
769 | } | |
770 | ||
f73e924c PM |
771 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
772 | [CTA_STATUS] = { .type = NLA_U32 }, | |
773 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
774 | [CTA_MARK] = { .type = NLA_U32 }, | |
775 | [CTA_USE] = { .type = NLA_U32 }, | |
776 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
777 | }; |
778 | ||
779 | static int | |
601e68e1 | 780 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 781 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
782 | { |
783 | struct nf_conntrack_tuple_hash *h; | |
784 | struct nf_conntrack_tuple tuple; | |
785 | struct nf_conn *ct; | |
786 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
787 | u_int8_t u3 = nfmsg->nfgen_family; | |
788 | int err = 0; | |
789 | ||
df6fb868 | 790 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 791 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 792 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
793 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
794 | else { | |
795 | /* Flush the whole table */ | |
796 | nf_conntrack_flush(); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | if (err < 0) | |
801 | return err; | |
802 | ||
330f7db5 | 803 | h = nf_conntrack_find_get(&tuple); |
9ea8cfd6 | 804 | if (!h) |
c1d10adb | 805 | return -ENOENT; |
c1d10adb PNA |
806 | |
807 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 808 | |
df6fb868 | 809 | if (cda[CTA_ID]) { |
77236b6e | 810 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 811 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
812 | nf_ct_put(ct); |
813 | return -ENOENT; | |
814 | } | |
601e68e1 | 815 | } |
c1d10adb | 816 | |
51091764 | 817 | nf_ct_kill(ct); |
c1d10adb | 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 */ | |
0adf9d67 | 894 | return -EBUSY; |
601e68e1 | 895 | |
c1d10adb PNA |
896 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
897 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 898 | return -EBUSY; |
601e68e1 | 899 | |
c1d10adb PNA |
900 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
901 | /* ASSURED bit can only be set */ | |
0adf9d67 | 902 | return -EBUSY; |
c1d10adb | 903 | |
df6fb868 | 904 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
5b1158e9 | 905 | #ifndef CONFIG_NF_NAT_NEEDED |
0adf9d67 | 906 | return -EOPNOTSUPP; |
c1d10adb | 907 | #else |
5b1158e9 | 908 | struct nf_nat_range range; |
c1d10adb | 909 | |
df6fb868 PM |
910 | if (cda[CTA_NAT_DST]) { |
911 | if (nfnetlink_parse_nat(cda[CTA_NAT_DST], ct, | |
3726add7 PM |
912 | &range) < 0) |
913 | return -EINVAL; | |
cc01dcbd | 914 | if (nf_nat_initialized(ct, IP_NAT_MANIP_DST)) |
3726add7 | 915 | return -EEXIST; |
cc01dcbd | 916 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST); |
3726add7 | 917 | } |
df6fb868 PM |
918 | if (cda[CTA_NAT_SRC]) { |
919 | if (nfnetlink_parse_nat(cda[CTA_NAT_SRC], ct, | |
3726add7 PM |
920 | &range) < 0) |
921 | return -EINVAL; | |
cc01dcbd | 922 | if (nf_nat_initialized(ct, IP_NAT_MANIP_SRC)) |
3726add7 | 923 | return -EEXIST; |
cc01dcbd | 924 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC); |
3726add7 | 925 | } |
c1d10adb PNA |
926 | #endif |
927 | } | |
928 | ||
929 | /* Be careful here, modifying NAT bits can screw up things, | |
930 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 931 | * nf_nat_range. */ |
c1d10adb PNA |
932 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
933 | return 0; | |
934 | } | |
935 | ||
936 | ||
937 | static inline int | |
df6fb868 | 938 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
939 | { |
940 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 941 | struct nf_conn_help *help = nfct_help(ct); |
c1d10adb PNA |
942 | char *helpname; |
943 | int err; | |
944 | ||
c1d10adb PNA |
945 | /* don't change helper of sibling connections */ |
946 | if (ct->master) | |
0adf9d67 | 947 | return -EBUSY; |
c1d10adb | 948 | |
df6fb868 | 949 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
950 | if (err < 0) |
951 | return err; | |
952 | ||
df293bbb YK |
953 | if (!strcmp(helpname, "")) { |
954 | if (help && help->helper) { | |
c1d10adb PNA |
955 | /* we had a helper before ... */ |
956 | nf_ct_remove_expectations(ct); | |
3c158f7f | 957 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 958 | } |
df293bbb YK |
959 | |
960 | return 0; | |
c1d10adb | 961 | } |
601e68e1 | 962 | |
df293bbb YK |
963 | helper = __nf_conntrack_helper_find_byname(helpname); |
964 | if (helper == NULL) | |
0adf9d67 | 965 | return -EOPNOTSUPP; |
df293bbb | 966 | |
ceceae1b YK |
967 | if (help) { |
968 | if (help->helper == helper) | |
969 | return 0; | |
970 | if (help->helper) | |
971 | return -EBUSY; | |
972 | /* need to zero data of old helper */ | |
973 | memset(&help->help, 0, sizeof(help->help)); | |
974 | } else { | |
b560580a | 975 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
ceceae1b YK |
976 | if (help == NULL) |
977 | return -ENOMEM; | |
978 | } | |
df293bbb | 979 | |
3c158f7f | 980 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
981 | |
982 | return 0; | |
983 | } | |
984 | ||
985 | static inline int | |
df6fb868 | 986 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 987 | { |
77236b6e | 988 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 989 | |
c1d10adb PNA |
990 | if (!del_timer(&ct->timeout)) |
991 | return -ETIME; | |
992 | ||
993 | ct->timeout.expires = jiffies + timeout * HZ; | |
994 | add_timer(&ct->timeout); | |
995 | ||
996 | return 0; | |
997 | } | |
998 | ||
999 | static inline int | |
df6fb868 | 1000 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1001 | { |
df6fb868 | 1002 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 1003 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1004 | int err = 0; |
1005 | ||
df6fb868 | 1006 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 1007 | |
5e8fbe2a | 1008 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
fdf70832 PM |
1009 | if (l4proto->from_nlattr) |
1010 | err = l4proto->from_nlattr(tb, ct); | |
605dcad6 | 1011 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
1012 | |
1013 | return err; | |
1014 | } | |
1015 | ||
13eae15a PNA |
1016 | #ifdef CONFIG_NF_NAT_NEEDED |
1017 | static inline int | |
1018 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1019 | { | |
1020 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1021 | ||
1022 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1023 | ||
1024 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | natseq->correction_pos = | |
77236b6e | 1028 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1029 | |
1030 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1031 | return -EINVAL; | |
1032 | ||
1033 | natseq->offset_before = | |
77236b6e | 1034 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1035 | |
1036 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | natseq->offset_after = | |
77236b6e | 1040 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1041 | |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | static int | |
1046 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1047 | { | |
1048 | int ret = 0; | |
1049 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1050 | ||
1051 | if (!nat) | |
1052 | return 0; | |
1053 | ||
1054 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1055 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1056 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1057 | if (ret < 0) | |
1058 | return ret; | |
1059 | ||
1060 | ct->status |= IPS_SEQ_ADJUST; | |
1061 | } | |
1062 | ||
1063 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1064 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1065 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1066 | if (ret < 0) | |
1067 | return ret; | |
1068 | ||
1069 | ct->status |= IPS_SEQ_ADJUST; | |
1070 | } | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | #endif | |
1075 | ||
c1d10adb | 1076 | static int |
df6fb868 | 1077 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1078 | { |
1079 | int err; | |
1080 | ||
df6fb868 | 1081 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1082 | err = ctnetlink_change_helper(ct, cda); |
1083 | if (err < 0) | |
1084 | return err; | |
1085 | } | |
1086 | ||
df6fb868 | 1087 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1088 | err = ctnetlink_change_timeout(ct, cda); |
1089 | if (err < 0) | |
1090 | return err; | |
1091 | } | |
1092 | ||
df6fb868 | 1093 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1094 | err = ctnetlink_change_status(ct, cda); |
1095 | if (err < 0) | |
1096 | return err; | |
1097 | } | |
1098 | ||
df6fb868 | 1099 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1100 | err = ctnetlink_change_protoinfo(ct, cda); |
1101 | if (err < 0) | |
1102 | return err; | |
1103 | } | |
1104 | ||
bcd1e830 | 1105 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1106 | if (cda[CTA_MARK]) |
77236b6e | 1107 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1108 | #endif |
1109 | ||
13eae15a PNA |
1110 | #ifdef CONFIG_NF_NAT_NEEDED |
1111 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1112 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1113 | if (err < 0) | |
1114 | return err; | |
1115 | } | |
1116 | #endif | |
1117 | ||
c1d10adb PNA |
1118 | return 0; |
1119 | } | |
1120 | ||
1121 | static int | |
df6fb868 | 1122 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1123 | struct nf_conntrack_tuple *otuple, |
5faa1f4c PNA |
1124 | struct nf_conntrack_tuple *rtuple, |
1125 | struct nf_conn *master_ct) | |
c1d10adb PNA |
1126 | { |
1127 | struct nf_conn *ct; | |
1128 | int err = -EINVAL; | |
dafc741c | 1129 | struct nf_conn_help *help; |
ceceae1b | 1130 | struct nf_conntrack_helper *helper; |
c1d10adb | 1131 | |
b891c5a8 | 1132 | ct = nf_conntrack_alloc(otuple, rtuple, GFP_KERNEL); |
c1d10adb | 1133 | if (ct == NULL || IS_ERR(ct)) |
601e68e1 | 1134 | return -ENOMEM; |
c1d10adb | 1135 | |
df6fb868 | 1136 | if (!cda[CTA_TIMEOUT]) |
c1d10adb | 1137 | goto err; |
77236b6e | 1138 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1139 | |
1140 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1141 | ct->status |= IPS_CONFIRMED; | |
1142 | ||
df6fb868 | 1143 | if (cda[CTA_STATUS]) { |
bbb3357d PNA |
1144 | err = ctnetlink_change_status(ct, cda); |
1145 | if (err < 0) | |
1146 | goto err; | |
1147 | } | |
c1d10adb | 1148 | |
df6fb868 | 1149 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1150 | err = ctnetlink_change_protoinfo(ct, cda); |
1151 | if (err < 0) | |
c54ea3b9 | 1152 | goto err; |
c1d10adb PNA |
1153 | } |
1154 | ||
bcd1e830 | 1155 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1156 | if (cda[CTA_MARK]) |
77236b6e | 1157 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1158 | #endif |
1159 | ||
58a3c9bb PM |
1160 | rcu_read_lock(); |
1161 | helper = __nf_ct_helper_find(rtuple); | |
ceceae1b | 1162 | if (helper) { |
b560580a | 1163 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
ceceae1b | 1164 | if (help == NULL) { |
58a3c9bb | 1165 | rcu_read_unlock(); |
ceceae1b YK |
1166 | err = -ENOMEM; |
1167 | goto err; | |
1168 | } | |
3c158f7f PM |
1169 | /* not in hash table yet so not strictly necessary */ |
1170 | rcu_assign_pointer(help->helper, helper); | |
1171 | } | |
dafc741c | 1172 | |
5faa1f4c | 1173 | /* setup master conntrack: this is a confirmed expectation */ |
f2a89004 PNA |
1174 | if (master_ct) { |
1175 | __set_bit(IPS_EXPECTED_BIT, &ct->status); | |
5faa1f4c | 1176 | ct->master = master_ct; |
f2a89004 | 1177 | } |
5faa1f4c | 1178 | |
c1d10adb PNA |
1179 | add_timer(&ct->timeout); |
1180 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1181 | rcu_read_unlock(); |
dafc741c | 1182 | |
c1d10adb PNA |
1183 | return 0; |
1184 | ||
601e68e1 | 1185 | err: |
c1d10adb PNA |
1186 | nf_conntrack_free(ct); |
1187 | return err; | |
1188 | } | |
1189 | ||
601e68e1 YH |
1190 | static int |
1191 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1192 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1193 | { |
1194 | struct nf_conntrack_tuple otuple, rtuple; | |
1195 | struct nf_conntrack_tuple_hash *h = NULL; | |
1196 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1197 | u_int8_t u3 = nfmsg->nfgen_family; | |
1198 | int err = 0; | |
1199 | ||
df6fb868 | 1200 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1201 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1202 | if (err < 0) | |
1203 | return err; | |
1204 | } | |
1205 | ||
df6fb868 | 1206 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1207 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1208 | if (err < 0) | |
1209 | return err; | |
1210 | } | |
1211 | ||
f8ba1aff | 1212 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1213 | if (cda[CTA_TUPLE_ORIG]) |
ba419aff | 1214 | h = __nf_conntrack_find(&otuple); |
df6fb868 | 1215 | else if (cda[CTA_TUPLE_REPLY]) |
ba419aff | 1216 | h = __nf_conntrack_find(&rtuple); |
c1d10adb PNA |
1217 | |
1218 | if (h == NULL) { | |
5faa1f4c PNA |
1219 | struct nf_conntrack_tuple master; |
1220 | struct nf_conntrack_tuple_hash *master_h = NULL; | |
1221 | struct nf_conn *master_ct = NULL; | |
1222 | ||
1223 | if (cda[CTA_TUPLE_MASTER]) { | |
1224 | err = ctnetlink_parse_tuple(cda, | |
1225 | &master, | |
1226 | CTA_TUPLE_MASTER, | |
1227 | u3); | |
1228 | if (err < 0) | |
1d670fdc | 1229 | goto out_unlock; |
5faa1f4c | 1230 | |
ba419aff | 1231 | master_h = __nf_conntrack_find(&master); |
5faa1f4c PNA |
1232 | if (master_h == NULL) { |
1233 | err = -ENOENT; | |
1234 | goto out_unlock; | |
1235 | } | |
1236 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
1237 | atomic_inc(&master_ct->ct_general.use); | |
1238 | } | |
1239 | ||
f8ba1aff | 1240 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1241 | err = -ENOENT; |
1242 | if (nlh->nlmsg_flags & NLM_F_CREATE) | |
5faa1f4c PNA |
1243 | err = ctnetlink_create_conntrack(cda, |
1244 | &otuple, | |
1245 | &rtuple, | |
1246 | master_ct); | |
1247 | if (err < 0 && master_ct) | |
1248 | nf_ct_put(master_ct); | |
1249 | ||
c1d10adb PNA |
1250 | return err; |
1251 | } | |
1252 | /* implicit 'else' */ | |
1253 | ||
c1d10adb PNA |
1254 | /* We manipulate the conntrack inside the global conntrack table lock, |
1255 | * so there's no need to increase the refcount */ | |
c1d10adb | 1256 | err = -EEXIST; |
ff4ca827 PNA |
1257 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
1258 | /* we only allow nat config for new conntracks */ | |
df6fb868 | 1259 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
0adf9d67 | 1260 | err = -EOPNOTSUPP; |
ff4ca827 PNA |
1261 | goto out_unlock; |
1262 | } | |
5faa1f4c PNA |
1263 | /* can't link an existing conntrack to a master */ |
1264 | if (cda[CTA_TUPLE_MASTER]) { | |
0adf9d67 | 1265 | err = -EOPNOTSUPP; |
5faa1f4c PNA |
1266 | goto out_unlock; |
1267 | } | |
ff4ca827 PNA |
1268 | err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), |
1269 | cda); | |
1270 | } | |
c1d10adb PNA |
1271 | |
1272 | out_unlock: | |
f8ba1aff | 1273 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1274 | return err; |
1275 | } | |
1276 | ||
601e68e1 YH |
1277 | /*********************************************************************** |
1278 | * EXPECT | |
1279 | ***********************************************************************/ | |
c1d10adb PNA |
1280 | |
1281 | static inline int | |
1282 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1283 | const struct nf_conntrack_tuple *tuple, | |
1284 | enum ctattr_expect type) | |
1285 | { | |
df6fb868 | 1286 | struct nlattr *nest_parms; |
601e68e1 | 1287 | |
df6fb868 PM |
1288 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1289 | if (!nest_parms) | |
1290 | goto nla_put_failure; | |
c1d10adb | 1291 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1292 | goto nla_put_failure; |
1293 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1294 | |
1295 | return 0; | |
1296 | ||
df6fb868 | 1297 | nla_put_failure: |
c1d10adb | 1298 | return -1; |
601e68e1 | 1299 | } |
c1d10adb | 1300 | |
1cde6436 PNA |
1301 | static inline int |
1302 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1303 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1304 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1305 | { |
1306 | int ret; | |
1307 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1308 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1309 | struct nf_conntrack_tuple m; |
df6fb868 | 1310 | struct nlattr *nest_parms; |
d4156e8c PM |
1311 | |
1312 | memset(&m, 0xFF, sizeof(m)); | |
1313 | m.src.u.all = mask->src.u.all; | |
1314 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1315 | ||
df6fb868 PM |
1316 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1317 | if (!nest_parms) | |
1318 | goto nla_put_failure; | |
1cde6436 PNA |
1319 | |
1320 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
d4156e8c | 1321 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1322 | nf_ct_l3proto_put(l3proto); |
1323 | ||
1324 | if (unlikely(ret < 0)) | |
df6fb868 | 1325 | goto nla_put_failure; |
1cde6436 | 1326 | |
605dcad6 | 1327 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1328 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
605dcad6 | 1329 | nf_ct_l4proto_put(l4proto); |
1cde6436 | 1330 | if (unlikely(ret < 0)) |
df6fb868 | 1331 | goto nla_put_failure; |
1cde6436 | 1332 | |
df6fb868 | 1333 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1334 | |
1335 | return 0; | |
1336 | ||
df6fb868 | 1337 | nla_put_failure: |
1cde6436 PNA |
1338 | return -1; |
1339 | } | |
1340 | ||
bb5cf80e | 1341 | static int |
c1d10adb | 1342 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1343 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1344 | { |
1345 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1346 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1347 | ||
1348 | if (timeout < 0) | |
1349 | timeout = 0; | |
c1d10adb PNA |
1350 | |
1351 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1352 | goto nla_put_failure; |
1cde6436 | 1353 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1354 | goto nla_put_failure; |
c1d10adb PNA |
1355 | if (ctnetlink_exp_dump_tuple(skb, |
1356 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1357 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1358 | goto nla_put_failure; |
601e68e1 | 1359 | |
d978e5da | 1360 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1361 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1362 | |
1363 | return 0; | |
601e68e1 | 1364 | |
df6fb868 | 1365 | nla_put_failure: |
c1d10adb PNA |
1366 | return -1; |
1367 | } | |
1368 | ||
1369 | static int | |
1370 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 YH |
1371 | int event, |
1372 | int nowait, | |
c1d10adb PNA |
1373 | const struct nf_conntrack_expect *exp) |
1374 | { | |
1375 | struct nlmsghdr *nlh; | |
1376 | struct nfgenmsg *nfmsg; | |
27a884dc | 1377 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1378 | |
1379 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1380 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1381 | nfmsg = NLMSG_DATA(nlh); | |
1382 | ||
1383 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
1384 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1385 | nfmsg->version = NFNETLINK_V0; | |
1386 | nfmsg->res_id = 0; | |
1387 | ||
1388 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1389 | goto nla_put_failure; |
c1d10adb | 1390 | |
27a884dc | 1391 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1392 | return skb->len; |
1393 | ||
1394 | nlmsg_failure: | |
df6fb868 | 1395 | nla_put_failure: |
dc5fc579 | 1396 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1397 | return -1; |
1398 | } | |
1399 | ||
1400 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1401 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1402 | unsigned long events, void *ptr) | |
1403 | { | |
1404 | struct nlmsghdr *nlh; | |
1405 | struct nfgenmsg *nfmsg; | |
1406 | struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr; | |
1407 | struct sk_buff *skb; | |
1408 | unsigned int type; | |
27a884dc | 1409 | sk_buff_data_t b; |
c1d10adb PNA |
1410 | int flags = 0; |
1411 | ||
1412 | if (events & IPEXP_NEW) { | |
1413 | type = IPCTNL_MSG_EXP_NEW; | |
1414 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1415 | } else | |
1416 | return NOTIFY_DONE; | |
1417 | ||
b3a27bfb PNA |
1418 | if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) |
1419 | return NOTIFY_DONE; | |
1420 | ||
c1d10adb PNA |
1421 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1422 | if (!skb) | |
1423 | return NOTIFY_DONE; | |
1424 | ||
1425 | b = skb->tail; | |
1426 | ||
b633ad5f | 1427 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
c1d10adb PNA |
1428 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
1429 | nfmsg = NLMSG_DATA(nlh); | |
1430 | ||
1431 | nlh->nlmsg_flags = flags; | |
1432 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1433 | nfmsg->version = NFNETLINK_V0; | |
1434 | nfmsg->res_id = 0; | |
1435 | ||
1436 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1437 | goto nla_put_failure; |
c1d10adb PNA |
1438 | |
1439 | nlh->nlmsg_len = skb->tail - b; | |
1440 | nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0); | |
1441 | return NOTIFY_DONE; | |
1442 | ||
1443 | nlmsg_failure: | |
df6fb868 | 1444 | nla_put_failure: |
c1d10adb PNA |
1445 | kfree_skb(skb); |
1446 | return NOTIFY_DONE; | |
1447 | } | |
1448 | #endif | |
cf6994c2 PM |
1449 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1450 | { | |
31f15875 PM |
1451 | if (cb->args[1]) |
1452 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1453 | return 0; |
1454 | } | |
c1d10adb PNA |
1455 | |
1456 | static int | |
1457 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1458 | { | |
cf6994c2 | 1459 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1460 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1461 | struct hlist_node *n; |
87711cb8 | 1462 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1463 | |
7d0742da | 1464 | rcu_read_lock(); |
31f15875 PM |
1465 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1466 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1467 | restart: |
31f15875 PM |
1468 | hlist_for_each_entry(exp, n, &nf_ct_expect_hash[cb->args[0]], |
1469 | hnode) { | |
1470 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1471 | continue; |
31f15875 PM |
1472 | if (cb->args[1]) { |
1473 | if (exp != last) | |
1474 | continue; | |
1475 | cb->args[1] = 0; | |
1476 | } | |
1477 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, | |
1478 | cb->nlh->nlmsg_seq, | |
1479 | IPCTNL_MSG_EXP_NEW, | |
1480 | 1, exp) < 0) { | |
7d0742da PM |
1481 | if (!atomic_inc_not_zero(&exp->use)) |
1482 | continue; | |
31f15875 PM |
1483 | cb->args[1] = (unsigned long)exp; |
1484 | goto out; | |
1485 | } | |
cf6994c2 | 1486 | } |
31f15875 PM |
1487 | if (cb->args[1]) { |
1488 | cb->args[1] = 0; | |
1489 | goto restart; | |
cf6994c2 PM |
1490 | } |
1491 | } | |
601e68e1 | 1492 | out: |
7d0742da | 1493 | rcu_read_unlock(); |
cf6994c2 PM |
1494 | if (last) |
1495 | nf_ct_expect_put(last); | |
c1d10adb | 1496 | |
c1d10adb PNA |
1497 | return skb->len; |
1498 | } | |
1499 | ||
f73e924c PM |
1500 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1501 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1502 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1503 | }; |
1504 | ||
1505 | static int | |
601e68e1 | 1506 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1507 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1508 | { |
1509 | struct nf_conntrack_tuple tuple; | |
1510 | struct nf_conntrack_expect *exp; | |
1511 | struct sk_buff *skb2; | |
1512 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1513 | u_int8_t u3 = nfmsg->nfgen_family; | |
1514 | int err = 0; | |
1515 | ||
c1d10adb | 1516 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1517 | return netlink_dump_start(ctnl, skb, nlh, |
1518 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1519 | ctnetlink_exp_done); |
c1d10adb PNA |
1520 | } |
1521 | ||
df6fb868 | 1522 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1523 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1524 | else | |
1525 | return -EINVAL; | |
1526 | ||
1527 | if (err < 0) | |
1528 | return err; | |
1529 | ||
6823645d | 1530 | exp = nf_ct_expect_find_get(&tuple); |
c1d10adb PNA |
1531 | if (!exp) |
1532 | return -ENOENT; | |
1533 | ||
df6fb868 | 1534 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1535 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1536 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1537 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1538 | return -ENOENT; |
1539 | } | |
601e68e1 | 1540 | } |
c1d10adb PNA |
1541 | |
1542 | err = -ENOMEM; | |
1543 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1544 | if (!skb2) | |
1545 | goto out; | |
4e9b8269 | 1546 | |
601e68e1 | 1547 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
c1d10adb PNA |
1548 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
1549 | 1, exp); | |
1550 | if (err <= 0) | |
1551 | goto free; | |
1552 | ||
6823645d | 1553 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1554 | |
1555 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1556 | ||
1557 | free: | |
1558 | kfree_skb(skb2); | |
1559 | out: | |
6823645d | 1560 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1561 | return err; |
1562 | } | |
1563 | ||
1564 | static int | |
601e68e1 | 1565 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1566 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1567 | { |
31f15875 | 1568 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1569 | struct nf_conntrack_tuple tuple; |
1570 | struct nf_conntrack_helper *h; | |
1571 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1572 | struct hlist_node *n, *next; |
c1d10adb | 1573 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1574 | unsigned int i; |
c1d10adb PNA |
1575 | int err; |
1576 | ||
df6fb868 | 1577 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1578 | /* delete a single expect by tuple */ |
1579 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1580 | if (err < 0) | |
1581 | return err; | |
1582 | ||
1583 | /* bump usage count to 2 */ | |
6823645d | 1584 | exp = nf_ct_expect_find_get(&tuple); |
c1d10adb PNA |
1585 | if (!exp) |
1586 | return -ENOENT; | |
1587 | ||
df6fb868 | 1588 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1589 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1590 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1591 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1592 | return -ENOENT; |
1593 | } | |
1594 | } | |
1595 | ||
1596 | /* after list removal, usage count == 1 */ | |
6823645d | 1597 | nf_ct_unexpect_related(exp); |
601e68e1 | 1598 | /* have to put what we 'get' above. |
c1d10adb | 1599 | * after this line usage count == 0 */ |
6823645d | 1600 | nf_ct_expect_put(exp); |
df6fb868 PM |
1601 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1602 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1603 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1604 | |
1605 | /* delete all expectations for this helper */ | |
f8ba1aff | 1606 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1607 | h = __nf_conntrack_helper_find_byname(name); |
1608 | if (!h) { | |
f8ba1aff | 1609 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1610 | return -EOPNOTSUPP; |
c1d10adb | 1611 | } |
31f15875 PM |
1612 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1613 | hlist_for_each_entry_safe(exp, n, next, | |
1614 | &nf_ct_expect_hash[i], | |
1615 | hnode) { | |
1616 | m_help = nfct_help(exp->master); | |
1617 | if (m_help->helper == h | |
1618 | && del_timer(&exp->timeout)) { | |
1619 | nf_ct_unlink_expect(exp); | |
1620 | nf_ct_expect_put(exp); | |
1621 | } | |
c1d10adb PNA |
1622 | } |
1623 | } | |
f8ba1aff | 1624 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1625 | } else { |
1626 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1627 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1628 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1629 | hlist_for_each_entry_safe(exp, n, next, | |
1630 | &nf_ct_expect_hash[i], | |
1631 | hnode) { | |
1632 | if (del_timer(&exp->timeout)) { | |
1633 | nf_ct_unlink_expect(exp); | |
1634 | nf_ct_expect_put(exp); | |
1635 | } | |
c1d10adb PNA |
1636 | } |
1637 | } | |
f8ba1aff | 1638 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1639 | } |
1640 | ||
1641 | return 0; | |
1642 | } | |
1643 | static int | |
df6fb868 | 1644 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1645 | { |
1646 | return -EOPNOTSUPP; | |
1647 | } | |
1648 | ||
1649 | static int | |
df6fb868 | 1650 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) |
c1d10adb PNA |
1651 | { |
1652 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1653 | struct nf_conntrack_tuple_hash *h = NULL; | |
1654 | struct nf_conntrack_expect *exp; | |
1655 | struct nf_conn *ct; | |
dc808fe2 | 1656 | struct nf_conn_help *help; |
c1d10adb PNA |
1657 | int err = 0; |
1658 | ||
c1d10adb PNA |
1659 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1660 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1661 | if (err < 0) | |
1662 | return err; | |
1663 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1664 | if (err < 0) | |
1665 | return err; | |
1666 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1667 | if (err < 0) | |
1668 | return err; | |
1669 | ||
1670 | /* Look for master conntrack of this expectation */ | |
330f7db5 | 1671 | h = nf_conntrack_find_get(&master_tuple); |
c1d10adb PNA |
1672 | if (!h) |
1673 | return -ENOENT; | |
1674 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1675 | help = nfct_help(ct); |
c1d10adb | 1676 | |
dc808fe2 | 1677 | if (!help || !help->helper) { |
c1d10adb PNA |
1678 | /* such conntrack hasn't got any helper, abort */ |
1679 | err = -EINVAL; | |
1680 | goto out; | |
1681 | } | |
1682 | ||
6823645d | 1683 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1684 | if (!exp) { |
1685 | err = -ENOMEM; | |
1686 | goto out; | |
1687 | } | |
601e68e1 | 1688 | |
c1d10adb PNA |
1689 | exp->expectfn = NULL; |
1690 | exp->flags = 0; | |
1691 | exp->master = ct; | |
9457d851 | 1692 | exp->helper = NULL; |
c1d10adb | 1693 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1694 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1695 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1696 | |
6823645d PM |
1697 | err = nf_ct_expect_related(exp); |
1698 | nf_ct_expect_put(exp); | |
c1d10adb | 1699 | |
601e68e1 | 1700 | out: |
c1d10adb PNA |
1701 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1702 | return err; | |
1703 | } | |
1704 | ||
1705 | static int | |
1706 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1707 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1708 | { |
1709 | struct nf_conntrack_tuple tuple; | |
1710 | struct nf_conntrack_expect *exp; | |
1711 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1712 | u_int8_t u3 = nfmsg->nfgen_family; | |
1713 | int err = 0; | |
1714 | ||
df6fb868 PM |
1715 | if (!cda[CTA_EXPECT_TUPLE] |
1716 | || !cda[CTA_EXPECT_MASK] | |
1717 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1718 | return -EINVAL; |
1719 | ||
1720 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1721 | if (err < 0) | |
1722 | return err; | |
1723 | ||
f8ba1aff | 1724 | spin_lock_bh(&nf_conntrack_lock); |
6823645d | 1725 | exp = __nf_ct_expect_find(&tuple); |
c1d10adb PNA |
1726 | |
1727 | if (!exp) { | |
f8ba1aff | 1728 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1729 | err = -ENOENT; |
1730 | if (nlh->nlmsg_flags & NLM_F_CREATE) | |
1731 | err = ctnetlink_create_expect(cda, u3); | |
1732 | return err; | |
1733 | } | |
1734 | ||
1735 | err = -EEXIST; | |
1736 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1737 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1738 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1739 | |
c1d10adb PNA |
1740 | return err; |
1741 | } | |
1742 | ||
1743 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1744 | static struct notifier_block ctnl_notifier = { | |
1745 | .notifier_call = ctnetlink_conntrack_event, | |
1746 | }; | |
1747 | ||
1748 | static struct notifier_block ctnl_notifier_exp = { | |
1749 | .notifier_call = ctnetlink_expect_event, | |
1750 | }; | |
1751 | #endif | |
1752 | ||
7c8d4cb4 | 1753 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1754 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1755 | .attr_count = CTA_MAX, |
1756 | .policy = ct_nla_policy }, | |
c1d10adb | 1757 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1758 | .attr_count = CTA_MAX, |
1759 | .policy = ct_nla_policy }, | |
c1d10adb | 1760 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1761 | .attr_count = CTA_MAX, |
1762 | .policy = ct_nla_policy }, | |
c1d10adb | 1763 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1764 | .attr_count = CTA_MAX, |
1765 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1766 | }; |
1767 | ||
7c8d4cb4 | 1768 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1769 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1770 | .attr_count = CTA_EXPECT_MAX, |
1771 | .policy = exp_nla_policy }, | |
c1d10adb | 1772 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1773 | .attr_count = CTA_EXPECT_MAX, |
1774 | .policy = exp_nla_policy }, | |
c1d10adb | 1775 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1776 | .attr_count = CTA_EXPECT_MAX, |
1777 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1778 | }; |
1779 | ||
7c8d4cb4 | 1780 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1781 | .name = "conntrack", |
1782 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1783 | .cb_count = IPCTNL_MSG_MAX, | |
1784 | .cb = ctnl_cb, | |
1785 | }; | |
1786 | ||
7c8d4cb4 | 1787 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1788 | .name = "conntrack_expect", |
1789 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1790 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1791 | .cb = ctnl_exp_cb, | |
1792 | }; | |
1793 | ||
d2483dde | 1794 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1795 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1796 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1797 | |
1798 | static int __init ctnetlink_init(void) | |
1799 | { | |
1800 | int ret; | |
1801 | ||
1802 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1803 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1804 | if (ret < 0) { | |
1805 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1806 | goto err_out; | |
1807 | } | |
1808 | ||
1809 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1810 | if (ret < 0) { | |
1811 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1812 | goto err_unreg_subsys; | |
1813 | } | |
1814 | ||
1815 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1816 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1817 | if (ret < 0) { | |
1818 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1819 | goto err_unreg_exp_subsys; | |
1820 | } | |
1821 | ||
6823645d | 1822 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1823 | if (ret < 0) { |
1824 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1825 | goto err_unreg_notifier; | |
1826 | } | |
1827 | #endif | |
1828 | ||
1829 | return 0; | |
1830 | ||
1831 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1832 | err_unreg_notifier: | |
1833 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1834 | err_unreg_exp_subsys: | |
1835 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1836 | #endif | |
1837 | err_unreg_subsys: | |
1838 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1839 | err_out: | |
1840 | return ret; | |
1841 | } | |
1842 | ||
1843 | static void __exit ctnetlink_exit(void) | |
1844 | { | |
1845 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1846 | ||
1847 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1848 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1849 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1850 | #endif | |
1851 | ||
1852 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1853 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1854 | return; | |
1855 | } | |
1856 | ||
1857 | module_init(ctnetlink_init); | |
1858 | module_exit(ctnetlink_exit); |