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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> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/netlink.h> | |
28 | #include <linux/spinlock.h> | |
40a839fd | 29 | #include <linux/interrupt.h> |
c1d10adb PNA |
30 | #include <linux/notifier.h> |
31 | ||
32 | #include <linux/netfilter.h> | |
dc5fc579 | 33 | #include <net/netlink.h> |
c1d10adb PNA |
34 | #include <net/netfilter/nf_conntrack.h> |
35 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 36 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
37 | #include <net/netfilter/nf_conntrack_helper.h> |
38 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 39 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 40 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 41 | #include <net/netfilter/nf_conntrack_acct.h> |
5b1158e9 JK |
42 | #ifdef CONFIG_NF_NAT_NEEDED |
43 | #include <net/netfilter/nf_nat_core.h> | |
44 | #include <net/netfilter/nf_nat_protocol.h> | |
45 | #endif | |
c1d10adb PNA |
46 | |
47 | #include <linux/netfilter/nfnetlink.h> | |
48 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
49 | ||
50 | MODULE_LICENSE("GPL"); | |
51 | ||
dc808fe2 | 52 | static char __initdata version[] = "0.93"; |
c1d10adb | 53 | |
c1d10adb | 54 | static inline int |
601e68e1 | 55 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 56 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 57 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 58 | { |
c1d10adb | 59 | int ret = 0; |
df6fb868 | 60 | struct nlattr *nest_parms; |
c1d10adb | 61 | |
df6fb868 PM |
62 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
63 | if (!nest_parms) | |
64 | goto nla_put_failure; | |
77236b6e | 65 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 66 | |
fdf70832 PM |
67 | if (likely(l4proto->tuple_to_nlattr)) |
68 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 69 | |
df6fb868 | 70 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
71 | |
72 | return ret; | |
73 | ||
df6fb868 | 74 | nla_put_failure: |
c1d10adb PNA |
75 | return -1; |
76 | } | |
77 | ||
78 | static inline int | |
1cde6436 PNA |
79 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
80 | const struct nf_conntrack_tuple *tuple, | |
81 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 82 | { |
c1d10adb | 83 | int ret = 0; |
df6fb868 PM |
84 | struct nlattr *nest_parms; |
85 | ||
86 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
87 | if (!nest_parms) | |
88 | goto nla_put_failure; | |
1cde6436 | 89 | |
fdf70832 PM |
90 | if (likely(l3proto->tuple_to_nlattr)) |
91 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 92 | |
df6fb868 | 93 | nla_nest_end(skb, nest_parms); |
c1d10adb | 94 | |
1cde6436 PNA |
95 | return ret; |
96 | ||
df6fb868 | 97 | nla_put_failure: |
1cde6436 PNA |
98 | return -1; |
99 | } | |
100 | ||
bb5cf80e | 101 | static int |
1cde6436 PNA |
102 | ctnetlink_dump_tuples(struct sk_buff *skb, |
103 | const struct nf_conntrack_tuple *tuple) | |
104 | { | |
105 | int ret; | |
106 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 107 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 108 | |
528a3a6f | 109 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 110 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
111 | |
112 | if (unlikely(ret < 0)) | |
113 | return ret; | |
114 | ||
528a3a6f | 115 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 116 | ret = ctnetlink_dump_tuples_proto(skb, tuple, 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 | ||
528a3a6f PNA |
153 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
154 | if (!l4proto->to_nlattr) | |
c1d10adb | 155 | return 0; |
601e68e1 | 156 | |
df6fb868 PM |
157 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
158 | if (!nest_proto) | |
159 | goto nla_put_failure; | |
c1d10adb | 160 | |
fdf70832 | 161 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 162 | |
df6fb868 | 163 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
164 | |
165 | return ret; | |
166 | ||
df6fb868 | 167 | nla_put_failure: |
c1d10adb PNA |
168 | return -1; |
169 | } | |
170 | ||
171 | static inline int | |
172 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
173 | { | |
df6fb868 | 174 | struct nlattr *nest_helper; |
dc808fe2 | 175 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 176 | struct nf_conntrack_helper *helper; |
c1d10adb | 177 | |
3c158f7f | 178 | if (!help) |
c1d10adb | 179 | return 0; |
601e68e1 | 180 | |
3c158f7f PM |
181 | helper = rcu_dereference(help->helper); |
182 | if (!helper) | |
183 | goto out; | |
184 | ||
df6fb868 PM |
185 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
186 | if (!nest_helper) | |
187 | goto nla_put_failure; | |
77236b6e | 188 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 189 | |
fdf70832 PM |
190 | if (helper->to_nlattr) |
191 | helper->to_nlattr(skb, ct); | |
c1d10adb | 192 | |
df6fb868 | 193 | nla_nest_end(skb, nest_helper); |
3c158f7f | 194 | out: |
c1d10adb PNA |
195 | return 0; |
196 | ||
df6fb868 | 197 | nla_put_failure: |
c1d10adb PNA |
198 | return -1; |
199 | } | |
200 | ||
bb5cf80e | 201 | static int |
c1d10adb PNA |
202 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
203 | enum ip_conntrack_dir dir) | |
204 | { | |
205 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 206 | struct nlattr *nest_count; |
58401572 KPO |
207 | const struct nf_conn_counter *acct; |
208 | ||
209 | acct = nf_conn_acct_find(ct); | |
210 | if (!acct) | |
211 | return 0; | |
c1d10adb | 212 | |
df6fb868 PM |
213 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
214 | if (!nest_count) | |
215 | goto nla_put_failure; | |
216 | ||
58401572 KPO |
217 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
218 | cpu_to_be64(acct[dir].packets)); | |
219 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
220 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 221 | |
df6fb868 | 222 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
223 | |
224 | return 0; | |
225 | ||
df6fb868 | 226 | nla_put_failure: |
c1d10adb PNA |
227 | return -1; |
228 | } | |
c1d10adb PNA |
229 | |
230 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
231 | static inline int | |
232 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
233 | { | |
77236b6e | 234 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
235 | return 0; |
236 | ||
df6fb868 | 237 | nla_put_failure: |
c1d10adb PNA |
238 | return -1; |
239 | } | |
240 | #else | |
241 | #define ctnetlink_dump_mark(a, b) (0) | |
242 | #endif | |
243 | ||
37fccd85 PNA |
244 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
245 | static inline int | |
246 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
247 | { | |
77236b6e | 248 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
249 | return 0; |
250 | ||
251 | nla_put_failure: | |
252 | return -1; | |
253 | } | |
254 | #else | |
255 | #define ctnetlink_dump_secmark(a, b) (0) | |
256 | #endif | |
257 | ||
0f417ce9 PNA |
258 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
259 | ||
260 | static inline int | |
261 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
262 | { | |
263 | struct nlattr *nest_parms; | |
264 | ||
265 | if (!(ct->status & IPS_EXPECTED)) | |
266 | return 0; | |
267 | ||
268 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
269 | if (!nest_parms) | |
270 | goto nla_put_failure; | |
271 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
272 | goto nla_put_failure; | |
273 | nla_nest_end(skb, nest_parms); | |
274 | ||
275 | return 0; | |
276 | ||
277 | nla_put_failure: | |
278 | return -1; | |
279 | } | |
280 | ||
13eae15a | 281 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 282 | static int |
13eae15a PNA |
283 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
284 | { | |
13eae15a PNA |
285 | struct nlattr *nest_parms; |
286 | ||
287 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
288 | if (!nest_parms) | |
289 | goto nla_put_failure; | |
290 | ||
77236b6e PM |
291 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
292 | htonl(natseq->correction_pos)); | |
293 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
294 | htonl(natseq->offset_before)); | |
295 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
296 | htonl(natseq->offset_after)); | |
13eae15a PNA |
297 | |
298 | nla_nest_end(skb, nest_parms); | |
299 | ||
300 | return 0; | |
301 | ||
302 | nla_put_failure: | |
303 | return -1; | |
304 | } | |
305 | ||
306 | static inline int | |
307 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
308 | { | |
309 | struct nf_nat_seq *natseq; | |
310 | struct nf_conn_nat *nat = nfct_nat(ct); | |
311 | ||
312 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
313 | return 0; | |
314 | ||
315 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
316 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
317 | return -1; | |
318 | ||
319 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
320 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
321 | return -1; | |
322 | ||
323 | return 0; | |
324 | } | |
325 | #else | |
326 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
327 | #endif | |
328 | ||
c1d10adb PNA |
329 | static inline int |
330 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
331 | { | |
77236b6e | 332 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
333 | return 0; |
334 | ||
df6fb868 | 335 | nla_put_failure: |
c1d10adb PNA |
336 | return -1; |
337 | } | |
338 | ||
339 | static inline int | |
340 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
341 | { | |
77236b6e | 342 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
343 | return 0; |
344 | ||
df6fb868 | 345 | nla_put_failure: |
c1d10adb PNA |
346 | return -1; |
347 | } | |
348 | ||
349 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) | |
350 | ||
351 | static int | |
352 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 | 353 | int event, int nowait, |
c1d10adb PNA |
354 | const struct nf_conn *ct) |
355 | { | |
356 | struct nlmsghdr *nlh; | |
357 | struct nfgenmsg *nfmsg; | |
df6fb868 | 358 | struct nlattr *nest_parms; |
27a884dc | 359 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
360 | |
361 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
362 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
363 | nfmsg = NLMSG_DATA(nlh); | |
364 | ||
365 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
5e8fbe2a | 366 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
367 | nfmsg->version = NFNETLINK_V0; |
368 | nfmsg->res_id = 0; | |
369 | ||
df6fb868 PM |
370 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
371 | if (!nest_parms) | |
372 | goto nla_put_failure; | |
c1d10adb | 373 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
374 | goto nla_put_failure; |
375 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 376 | |
df6fb868 PM |
377 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
378 | if (!nest_parms) | |
379 | goto nla_put_failure; | |
c1d10adb | 380 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
381 | goto nla_put_failure; |
382 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
383 | |
384 | if (ctnetlink_dump_status(skb, ct) < 0 || | |
385 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
386 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
387 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
388 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
389 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
390 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 391 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 392 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 393 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 394 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 395 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 396 | goto nla_put_failure; |
c1d10adb | 397 | |
27a884dc | 398 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
399 | return skb->len; |
400 | ||
401 | nlmsg_failure: | |
df6fb868 | 402 | nla_put_failure: |
dc5fc579 | 403 | nlmsg_trim(skb, b); |
c1d10adb PNA |
404 | return -1; |
405 | } | |
406 | ||
407 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
408 | static int ctnetlink_conntrack_event(struct notifier_block *this, | |
601e68e1 | 409 | unsigned long events, void *ptr) |
c1d10adb PNA |
410 | { |
411 | struct nlmsghdr *nlh; | |
412 | struct nfgenmsg *nfmsg; | |
df6fb868 | 413 | struct nlattr *nest_parms; |
19abb7b0 PNA |
414 | struct nf_ct_event *item = (struct nf_ct_event *)ptr; |
415 | struct nf_conn *ct = item->ct; | |
c1d10adb PNA |
416 | struct sk_buff *skb; |
417 | unsigned int type; | |
27a884dc | 418 | sk_buff_data_t b; |
c1d10adb PNA |
419 | unsigned int flags = 0, group; |
420 | ||
421 | /* ignore our fake conntrack entry */ | |
422 | if (ct == &nf_conntrack_untracked) | |
423 | return NOTIFY_DONE; | |
424 | ||
425 | if (events & IPCT_DESTROY) { | |
426 | type = IPCTNL_MSG_CT_DELETE; | |
427 | group = NFNLGRP_CONNTRACK_DESTROY; | |
428 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { | |
429 | type = IPCTNL_MSG_CT_NEW; | |
430 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 431 | group = NFNLGRP_CONNTRACK_NEW; |
1a31526b | 432 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
c1d10adb PNA |
433 | type = IPCTNL_MSG_CT_NEW; |
434 | group = NFNLGRP_CONNTRACK_UPDATE; | |
435 | } else | |
436 | return NOTIFY_DONE; | |
a2427692 | 437 | |
1f9da256 | 438 | if (!item->report && !nfnetlink_has_listeners(group)) |
a2427692 PM |
439 | return NOTIFY_DONE; |
440 | ||
c1d10adb PNA |
441 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
442 | if (!skb) | |
443 | return NOTIFY_DONE; | |
444 | ||
445 | b = skb->tail; | |
446 | ||
447 | type |= NFNL_SUBSYS_CTNETLINK << 8; | |
19abb7b0 | 448 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
449 | nfmsg = NLMSG_DATA(nlh); |
450 | ||
451 | nlh->nlmsg_flags = flags; | |
5e8fbe2a | 452 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
453 | nfmsg->version = NFNETLINK_V0; |
454 | nfmsg->res_id = 0; | |
455 | ||
528a3a6f | 456 | rcu_read_lock(); |
df6fb868 PM |
457 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
458 | if (!nest_parms) | |
459 | goto nla_put_failure; | |
c1d10adb | 460 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
461 | goto nla_put_failure; |
462 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 463 | |
df6fb868 PM |
464 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
465 | if (!nest_parms) | |
466 | goto nla_put_failure; | |
c1d10adb | 467 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
468 | goto nla_put_failure; |
469 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 470 | |
1eedf699 EL |
471 | if (ctnetlink_dump_id(skb, ct) < 0) |
472 | goto nla_put_failure; | |
473 | ||
e57dce60 FH |
474 | if (ctnetlink_dump_status(skb, ct) < 0) |
475 | goto nla_put_failure; | |
476 | ||
7b621c1e PNA |
477 | if (events & IPCT_DESTROY) { |
478 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
479 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 480 | goto nla_put_failure; |
7b621c1e | 481 | } else { |
7b621c1e | 482 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 483 | goto nla_put_failure; |
7b621c1e PNA |
484 | |
485 | if (events & IPCT_PROTOINFO | |
486 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 487 | goto nla_put_failure; |
7b621c1e PNA |
488 | |
489 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
490 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 491 | goto nla_put_failure; |
7b621c1e | 492 | |
37fccd85 PNA |
493 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
494 | if ((events & IPCT_SECMARK || ct->secmark) | |
495 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
496 | goto nla_put_failure; | |
497 | #endif | |
7b621c1e | 498 | |
0f417ce9 PNA |
499 | if (events & IPCT_RELATED && |
500 | ctnetlink_dump_master(skb, ct) < 0) | |
501 | goto nla_put_failure; | |
502 | ||
13eae15a PNA |
503 | if (events & IPCT_NATSEQADJ && |
504 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
505 | goto nla_put_failure; | |
7b621c1e | 506 | } |
b9a37e0c | 507 | |
a83099a6 EL |
508 | #ifdef CONFIG_NF_CONNTRACK_MARK |
509 | if ((events & IPCT_MARK || ct->mark) | |
510 | && ctnetlink_dump_mark(skb, ct) < 0) | |
511 | goto nla_put_failure; | |
512 | #endif | |
528a3a6f | 513 | rcu_read_unlock(); |
a83099a6 | 514 | |
c1d10adb | 515 | nlh->nlmsg_len = skb->tail - b; |
19abb7b0 | 516 | nfnetlink_send(skb, item->pid, group, item->report); |
c1d10adb PNA |
517 | return NOTIFY_DONE; |
518 | ||
df6fb868 | 519 | nla_put_failure: |
528a3a6f PNA |
520 | rcu_read_unlock(); |
521 | nlmsg_failure: | |
dd5b6ce6 | 522 | nfnetlink_set_err(0, group, -ENOBUFS); |
c1d10adb PNA |
523 | kfree_skb(skb); |
524 | return NOTIFY_DONE; | |
525 | } | |
526 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
527 | ||
528 | static int ctnetlink_done(struct netlink_callback *cb) | |
529 | { | |
89f2e218 PM |
530 | if (cb->args[1]) |
531 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
532 | return 0; |
533 | } | |
534 | ||
535 | static int | |
536 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
537 | { | |
89f2e218 | 538 | struct nf_conn *ct, *last; |
c1d10adb | 539 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 540 | struct hlist_nulls_node *n; |
87711cb8 PNA |
541 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
542 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 543 | |
76507f69 | 544 | rcu_read_lock(); |
d205dc40 | 545 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
546 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
547 | restart: | |
ea781f19 ED |
548 | hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
549 | hnnode) { | |
5b1158e9 | 550 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
551 | continue; |
552 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
553 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
554 | continue; | |
87711cb8 PNA |
555 | /* Dump entries of a given L3 protocol number. |
556 | * If it is not specified, ie. l3proto == 0, | |
557 | * then dump everything. */ | |
5e8fbe2a | 558 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 559 | goto releasect; |
d205dc40 PM |
560 | if (cb->args[1]) { |
561 | if (ct != last) | |
ea781f19 | 562 | goto releasect; |
d205dc40 | 563 | cb->args[1] = 0; |
89f2e218 | 564 | } |
c1d10adb | 565 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 566 | cb->nlh->nlmsg_seq, |
c1d10adb | 567 | IPCTNL_MSG_CT_NEW, |
89f2e218 | 568 | 1, ct) < 0) { |
89f2e218 | 569 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 570 | goto out; |
89f2e218 | 571 | } |
58401572 | 572 | |
01f34848 | 573 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
574 | IPCTNL_MSG_CT_GET_CTRZERO) { |
575 | struct nf_conn_counter *acct; | |
576 | ||
577 | acct = nf_conn_acct_find(ct); | |
578 | if (acct) | |
579 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
580 | } | |
ea781f19 ED |
581 | releasect: |
582 | nf_ct_put(ct); | |
89f2e218 | 583 | } |
d205dc40 | 584 | if (cb->args[1]) { |
89f2e218 PM |
585 | cb->args[1] = 0; |
586 | goto restart; | |
c1d10adb PNA |
587 | } |
588 | } | |
89f2e218 | 589 | out: |
76507f69 | 590 | rcu_read_unlock(); |
d205dc40 PM |
591 | if (last) |
592 | nf_ct_put(last); | |
c1d10adb | 593 | |
c1d10adb PNA |
594 | return skb->len; |
595 | } | |
596 | ||
c1d10adb | 597 | static inline int |
df6fb868 | 598 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 599 | { |
df6fb868 | 600 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
601 | struct nf_conntrack_l3proto *l3proto; |
602 | int ret = 0; | |
603 | ||
df6fb868 | 604 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 605 | |
cd91566e FW |
606 | rcu_read_lock(); |
607 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 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 | 615 | |
cd91566e | 616 | rcu_read_unlock(); |
c1d10adb | 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 | |
cd91566e FW |
641 | rcu_read_lock(); |
642 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 643 | |
f73e924c PM |
644 | if (likely(l4proto->nlattr_to_tuple)) { |
645 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
646 | l4proto->nla_policy); | |
647 | if (ret == 0) | |
648 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
649 | } | |
c1d10adb | 650 | |
cd91566e | 651 | rcu_read_unlock(); |
601e68e1 | 652 | |
c1d10adb PNA |
653 | return ret; |
654 | } | |
655 | ||
bb5cf80e | 656 | static int |
df6fb868 | 657 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
658 | enum ctattr_tuple type, u_int8_t l3num) |
659 | { | |
df6fb868 | 660 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
661 | int err; |
662 | ||
c1d10adb PNA |
663 | memset(tuple, 0, sizeof(*tuple)); |
664 | ||
df6fb868 | 665 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 666 | |
df6fb868 | 667 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
668 | return -EINVAL; |
669 | ||
670 | tuple->src.l3num = l3num; | |
671 | ||
df6fb868 | 672 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
673 | if (err < 0) |
674 | return err; | |
675 | ||
df6fb868 | 676 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
677 | return -EINVAL; |
678 | ||
df6fb868 | 679 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
680 | if (err < 0) |
681 | return err; | |
682 | ||
683 | /* orig and expect tuples get DIR_ORIGINAL */ | |
684 | if (type == CTA_TUPLE_REPLY) | |
685 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
686 | else | |
687 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
688 | ||
c1d10adb PNA |
689 | return 0; |
690 | } | |
691 | ||
c1d10adb | 692 | static inline int |
df6fb868 | 693 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 694 | { |
df6fb868 | 695 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 696 | |
df6fb868 | 697 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 698 | |
df6fb868 | 699 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
700 | return -EINVAL; |
701 | ||
df6fb868 | 702 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
703 | |
704 | return 0; | |
705 | } | |
706 | ||
f73e924c PM |
707 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
708 | [CTA_STATUS] = { .type = NLA_U32 }, | |
709 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
710 | [CTA_MARK] = { .type = NLA_U32 }, | |
711 | [CTA_USE] = { .type = NLA_U32 }, | |
712 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
713 | }; |
714 | ||
715 | static int | |
601e68e1 | 716 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 717 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
718 | { |
719 | struct nf_conntrack_tuple_hash *h; | |
720 | struct nf_conntrack_tuple tuple; | |
721 | struct nf_conn *ct; | |
722 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
723 | u_int8_t u3 = nfmsg->nfgen_family; | |
724 | int err = 0; | |
725 | ||
df6fb868 | 726 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 727 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 728 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
729 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
730 | else { | |
731 | /* Flush the whole table */ | |
19abb7b0 PNA |
732 | nf_conntrack_flush(&init_net, |
733 | NETLINK_CB(skb).pid, | |
734 | nlmsg_report(nlh)); | |
c1d10adb PNA |
735 | return 0; |
736 | } | |
737 | ||
738 | if (err < 0) | |
739 | return err; | |
740 | ||
400dad39 | 741 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 742 | if (!h) |
c1d10adb | 743 | return -ENOENT; |
c1d10adb PNA |
744 | |
745 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 746 | |
df6fb868 | 747 | if (cda[CTA_ID]) { |
77236b6e | 748 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 749 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
750 | nf_ct_put(ct); |
751 | return -ENOENT; | |
752 | } | |
601e68e1 | 753 | } |
c1d10adb | 754 | |
19abb7b0 PNA |
755 | nf_conntrack_event_report(IPCT_DESTROY, |
756 | ct, | |
757 | NETLINK_CB(skb).pid, | |
758 | nlmsg_report(nlh)); | |
759 | ||
760 | /* death_by_timeout would report the event again */ | |
761 | set_bit(IPS_DYING_BIT, &ct->status); | |
762 | ||
51091764 | 763 | nf_ct_kill(ct); |
c1d10adb | 764 | nf_ct_put(ct); |
c1d10adb PNA |
765 | |
766 | return 0; | |
767 | } | |
768 | ||
769 | static int | |
601e68e1 | 770 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 771 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
772 | { |
773 | struct nf_conntrack_tuple_hash *h; | |
774 | struct nf_conntrack_tuple tuple; | |
775 | struct nf_conn *ct; | |
776 | struct sk_buff *skb2 = NULL; | |
777 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
778 | u_int8_t u3 = nfmsg->nfgen_family; | |
779 | int err = 0; | |
780 | ||
58401572 | 781 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
782 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
783 | ctnetlink_done); | |
c1d10adb | 784 | |
df6fb868 | 785 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 786 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 787 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
788 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
789 | else | |
790 | return -EINVAL; | |
791 | ||
792 | if (err < 0) | |
793 | return err; | |
794 | ||
400dad39 | 795 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 796 | if (!h) |
c1d10adb | 797 | return -ENOENT; |
9ea8cfd6 | 798 | |
c1d10adb PNA |
799 | ct = nf_ct_tuplehash_to_ctrack(h); |
800 | ||
801 | err = -ENOMEM; | |
802 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
803 | if (!skb2) { | |
804 | nf_ct_put(ct); | |
805 | return -ENOMEM; | |
806 | } | |
c1d10adb | 807 | |
528a3a6f | 808 | rcu_read_lock(); |
601e68e1 | 809 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
c1d10adb | 810 | IPCTNL_MSG_CT_NEW, 1, ct); |
528a3a6f | 811 | rcu_read_unlock(); |
c1d10adb PNA |
812 | nf_ct_put(ct); |
813 | if (err <= 0) | |
814 | goto free; | |
815 | ||
816 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
817 | if (err < 0) | |
818 | goto out; | |
819 | ||
c1d10adb PNA |
820 | return 0; |
821 | ||
822 | free: | |
823 | kfree_skb(skb2); | |
824 | out: | |
825 | return err; | |
826 | } | |
827 | ||
67671841 | 828 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
829 | static int |
830 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
831 | enum nf_nat_manip_type manip, | |
832 | struct nlattr *attr) | |
833 | { | |
834 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
835 | ||
836 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
837 | if (!parse_nat_setup) { | |
95a5afca | 838 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 839 | rcu_read_unlock(); |
748085fc | 840 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
841 | nfnl_unlock(); |
842 | if (request_module("nf-nat-ipv4") < 0) { | |
843 | nfnl_lock(); | |
748085fc | 844 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
845 | rcu_read_lock(); |
846 | return -EOPNOTSUPP; | |
847 | } | |
848 | nfnl_lock(); | |
748085fc | 849 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
850 | rcu_read_lock(); |
851 | if (nfnetlink_parse_nat_setup_hook) | |
852 | return -EAGAIN; | |
853 | #endif | |
854 | return -EOPNOTSUPP; | |
855 | } | |
856 | ||
857 | return parse_nat_setup(ct, manip, attr); | |
858 | } | |
67671841 | 859 | #endif |
e6a7d3c0 | 860 | |
bb5cf80e | 861 | static int |
df6fb868 | 862 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
863 | { |
864 | unsigned long d; | |
77236b6e | 865 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
866 | d = ct->status ^ status; |
867 | ||
868 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
869 | /* unchangeable */ | |
0adf9d67 | 870 | return -EBUSY; |
601e68e1 | 871 | |
c1d10adb PNA |
872 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
873 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 874 | return -EBUSY; |
601e68e1 | 875 | |
c1d10adb PNA |
876 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
877 | /* ASSURED bit can only be set */ | |
0adf9d67 | 878 | return -EBUSY; |
c1d10adb | 879 | |
c1d10adb PNA |
880 | /* Be careful here, modifying NAT bits can screw up things, |
881 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 882 | * nf_nat_range. */ |
c1d10adb PNA |
883 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
884 | return 0; | |
885 | } | |
886 | ||
e6a7d3c0 PNA |
887 | static int |
888 | ctnetlink_change_nat(struct nf_conn *ct, struct nlattr *cda[]) | |
889 | { | |
890 | #ifdef CONFIG_NF_NAT_NEEDED | |
891 | int ret; | |
892 | ||
893 | if (cda[CTA_NAT_DST]) { | |
894 | ret = ctnetlink_parse_nat_setup(ct, | |
895 | IP_NAT_MANIP_DST, | |
896 | cda[CTA_NAT_DST]); | |
897 | if (ret < 0) | |
898 | return ret; | |
899 | } | |
900 | if (cda[CTA_NAT_SRC]) { | |
901 | ret = ctnetlink_parse_nat_setup(ct, | |
902 | IP_NAT_MANIP_SRC, | |
903 | cda[CTA_NAT_SRC]); | |
904 | if (ret < 0) | |
905 | return ret; | |
906 | } | |
907 | return 0; | |
908 | #else | |
909 | return -EOPNOTSUPP; | |
910 | #endif | |
911 | } | |
c1d10adb PNA |
912 | |
913 | static inline int | |
df6fb868 | 914 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
915 | { |
916 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 917 | struct nf_conn_help *help = nfct_help(ct); |
c1d10adb PNA |
918 | char *helpname; |
919 | int err; | |
920 | ||
c1d10adb PNA |
921 | /* don't change helper of sibling connections */ |
922 | if (ct->master) | |
0adf9d67 | 923 | return -EBUSY; |
c1d10adb | 924 | |
df6fb868 | 925 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
926 | if (err < 0) |
927 | return err; | |
928 | ||
df293bbb YK |
929 | if (!strcmp(helpname, "")) { |
930 | if (help && help->helper) { | |
c1d10adb PNA |
931 | /* we had a helper before ... */ |
932 | nf_ct_remove_expectations(ct); | |
3c158f7f | 933 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 934 | } |
df293bbb YK |
935 | |
936 | return 0; | |
c1d10adb | 937 | } |
601e68e1 | 938 | |
df293bbb | 939 | helper = __nf_conntrack_helper_find_byname(helpname); |
226c0c0e PNA |
940 | if (helper == NULL) { |
941 | #ifdef CONFIG_MODULES | |
942 | spin_unlock_bh(&nf_conntrack_lock); | |
943 | ||
944 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
945 | spin_lock_bh(&nf_conntrack_lock); | |
946 | return -EOPNOTSUPP; | |
947 | } | |
948 | ||
949 | spin_lock_bh(&nf_conntrack_lock); | |
950 | helper = __nf_conntrack_helper_find_byname(helpname); | |
951 | if (helper) | |
952 | return -EAGAIN; | |
953 | #endif | |
0adf9d67 | 954 | return -EOPNOTSUPP; |
226c0c0e | 955 | } |
df293bbb | 956 | |
ceceae1b YK |
957 | if (help) { |
958 | if (help->helper == helper) | |
959 | return 0; | |
960 | if (help->helper) | |
961 | return -EBUSY; | |
962 | /* need to zero data of old helper */ | |
963 | memset(&help->help, 0, sizeof(help->help)); | |
964 | } else { | |
fab00c5d | 965 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
ceceae1b YK |
966 | if (help == NULL) |
967 | return -ENOMEM; | |
968 | } | |
df293bbb | 969 | |
3c158f7f | 970 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
971 | |
972 | return 0; | |
973 | } | |
974 | ||
975 | static inline int | |
df6fb868 | 976 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 977 | { |
77236b6e | 978 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 979 | |
c1d10adb PNA |
980 | if (!del_timer(&ct->timeout)) |
981 | return -ETIME; | |
982 | ||
983 | ct->timeout.expires = jiffies + timeout * HZ; | |
984 | add_timer(&ct->timeout); | |
985 | ||
986 | return 0; | |
987 | } | |
988 | ||
989 | static inline int | |
df6fb868 | 990 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 991 | { |
df6fb868 | 992 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 993 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
994 | int err = 0; |
995 | ||
df6fb868 | 996 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 997 | |
cd91566e FW |
998 | rcu_read_lock(); |
999 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1000 | if (l4proto->from_nlattr) |
1001 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1002 | rcu_read_unlock(); |
c1d10adb PNA |
1003 | |
1004 | return err; | |
1005 | } | |
1006 | ||
13eae15a PNA |
1007 | #ifdef CONFIG_NF_NAT_NEEDED |
1008 | static inline int | |
1009 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1010 | { | |
1011 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1012 | ||
1013 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1014 | ||
1015 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1016 | return -EINVAL; | |
1017 | ||
1018 | natseq->correction_pos = | |
77236b6e | 1019 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1020 | |
1021 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1022 | return -EINVAL; | |
1023 | ||
1024 | natseq->offset_before = | |
77236b6e | 1025 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1026 | |
1027 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1028 | return -EINVAL; | |
1029 | ||
1030 | natseq->offset_after = | |
77236b6e | 1031 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1032 | |
1033 | return 0; | |
1034 | } | |
1035 | ||
1036 | static int | |
1037 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1038 | { | |
1039 | int ret = 0; | |
1040 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1041 | ||
1042 | if (!nat) | |
1043 | return 0; | |
1044 | ||
1045 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1046 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1047 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1048 | if (ret < 0) | |
1049 | return ret; | |
1050 | ||
1051 | ct->status |= IPS_SEQ_ADJUST; | |
1052 | } | |
1053 | ||
1054 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1055 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1056 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1057 | if (ret < 0) | |
1058 | return ret; | |
1059 | ||
1060 | ct->status |= IPS_SEQ_ADJUST; | |
1061 | } | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | #endif | |
1066 | ||
c1d10adb | 1067 | static int |
df6fb868 | 1068 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1069 | { |
1070 | int err; | |
1071 | ||
e098360f PNA |
1072 | /* only allow NAT changes and master assignation for new conntracks */ |
1073 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1074 | return -EOPNOTSUPP; | |
1075 | ||
df6fb868 | 1076 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1077 | err = ctnetlink_change_helper(ct, cda); |
1078 | if (err < 0) | |
1079 | return err; | |
1080 | } | |
1081 | ||
df6fb868 | 1082 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1083 | err = ctnetlink_change_timeout(ct, cda); |
1084 | if (err < 0) | |
1085 | return err; | |
1086 | } | |
1087 | ||
df6fb868 | 1088 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1089 | err = ctnetlink_change_status(ct, cda); |
1090 | if (err < 0) | |
1091 | return err; | |
1092 | } | |
1093 | ||
df6fb868 | 1094 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1095 | err = ctnetlink_change_protoinfo(ct, cda); |
1096 | if (err < 0) | |
1097 | return err; | |
1098 | } | |
1099 | ||
bcd1e830 | 1100 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1101 | if (cda[CTA_MARK]) |
77236b6e | 1102 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1103 | #endif |
1104 | ||
13eae15a PNA |
1105 | #ifdef CONFIG_NF_NAT_NEEDED |
1106 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1107 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1108 | if (err < 0) | |
1109 | return err; | |
1110 | } | |
1111 | #endif | |
1112 | ||
c1d10adb PNA |
1113 | return 0; |
1114 | } | |
1115 | ||
19abb7b0 PNA |
1116 | static inline void |
1117 | ctnetlink_event_report(struct nf_conn *ct, u32 pid, int report) | |
1118 | { | |
1119 | unsigned int events = 0; | |
1120 | ||
1121 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) | |
1122 | events |= IPCT_RELATED; | |
1123 | else | |
1124 | events |= IPCT_NEW; | |
1125 | ||
1126 | nf_conntrack_event_report(IPCT_STATUS | | |
1127 | IPCT_HELPER | | |
1128 | IPCT_REFRESH | | |
1129 | IPCT_PROTOINFO | | |
1130 | IPCT_NATSEQADJ | | |
1131 | IPCT_MARK | | |
1132 | events, | |
1133 | ct, | |
1134 | pid, | |
1135 | report); | |
1136 | } | |
1137 | ||
f0a3c086 | 1138 | static struct nf_conn * |
df6fb868 | 1139 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1140 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1141 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1142 | u8 u3) |
c1d10adb PNA |
1143 | { |
1144 | struct nf_conn *ct; | |
1145 | int err = -EINVAL; | |
ceceae1b | 1146 | struct nf_conntrack_helper *helper; |
c1d10adb | 1147 | |
b54ad409 | 1148 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1149 | if (IS_ERR(ct)) |
f0a3c086 | 1150 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1151 | |
df6fb868 | 1152 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1153 | goto err1; |
77236b6e | 1154 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1155 | |
1156 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1157 | ct->status |= IPS_CONFIRMED; | |
1158 | ||
1575e7ea | 1159 | rcu_read_lock(); |
226c0c0e PNA |
1160 | if (cda[CTA_HELP]) { |
1161 | char *helpname; | |
1162 | ||
1163 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1164 | if (err < 0) |
1165 | goto err2; | |
226c0c0e PNA |
1166 | |
1167 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1168 | if (helper == NULL) { | |
1169 | rcu_read_unlock(); | |
1170 | #ifdef CONFIG_MODULES | |
1171 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1172 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1173 | goto err1; |
226c0c0e PNA |
1174 | } |
1175 | ||
1176 | rcu_read_lock(); | |
1177 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1178 | if (helper) { | |
226c0c0e | 1179 | err = -EAGAIN; |
0f5b3e85 | 1180 | goto err2; |
226c0c0e PNA |
1181 | } |
1182 | rcu_read_unlock(); | |
1183 | #endif | |
1184 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1185 | goto err1; |
226c0c0e PNA |
1186 | } else { |
1187 | struct nf_conn_help *help; | |
1188 | ||
1189 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1190 | if (help == NULL) { | |
226c0c0e | 1191 | err = -ENOMEM; |
0f5b3e85 | 1192 | goto err2; |
226c0c0e PNA |
1193 | } |
1194 | ||
1195 | /* not in hash table yet so not strictly necessary */ | |
1196 | rcu_assign_pointer(help->helper, helper); | |
1197 | } | |
1198 | } else { | |
1199 | /* try an implicit helper assignation */ | |
1200 | err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); | |
0f5b3e85 PM |
1201 | if (err < 0) |
1202 | goto err2; | |
1575e7ea PNA |
1203 | } |
1204 | ||
df6fb868 | 1205 | if (cda[CTA_STATUS]) { |
bbb3357d | 1206 | err = ctnetlink_change_status(ct, cda); |
0f5b3e85 PM |
1207 | if (err < 0) |
1208 | goto err2; | |
e6a7d3c0 PNA |
1209 | } |
1210 | ||
1211 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { | |
1212 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1213 | if (err < 0) |
1214 | goto err2; | |
bbb3357d | 1215 | } |
c1d10adb | 1216 | |
c969aa7d PNA |
1217 | #ifdef CONFIG_NF_NAT_NEEDED |
1218 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1219 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1220 | if (err < 0) |
1221 | goto err2; | |
c969aa7d PNA |
1222 | } |
1223 | #endif | |
1224 | ||
df6fb868 | 1225 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1226 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1227 | if (err < 0) |
1228 | goto err2; | |
c1d10adb PNA |
1229 | } |
1230 | ||
3ec19255 | 1231 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
58401572 | 1232 | |
bcd1e830 | 1233 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1234 | if (cda[CTA_MARK]) |
77236b6e | 1235 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1236 | #endif |
1237 | ||
5faa1f4c | 1238 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1239 | if (cda[CTA_TUPLE_MASTER]) { |
1240 | struct nf_conntrack_tuple master; | |
1241 | struct nf_conntrack_tuple_hash *master_h; | |
1242 | struct nf_conn *master_ct; | |
1243 | ||
1244 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1245 | if (err < 0) | |
0f5b3e85 | 1246 | goto err2; |
7ec47496 | 1247 | |
ea781f19 | 1248 | master_h = nf_conntrack_find_get(&init_net, &master); |
7ec47496 PNA |
1249 | if (master_h == NULL) { |
1250 | err = -ENOENT; | |
0f5b3e85 | 1251 | goto err2; |
7ec47496 PNA |
1252 | } |
1253 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1254 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1255 | ct->master = master_ct; |
f2a89004 | 1256 | } |
5faa1f4c | 1257 | |
c1d10adb PNA |
1258 | add_timer(&ct->timeout); |
1259 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1260 | rcu_read_unlock(); |
c1d10adb | 1261 | |
f0a3c086 | 1262 | return ct; |
0f5b3e85 PM |
1263 | |
1264 | err2: | |
1265 | rcu_read_unlock(); | |
1266 | err1: | |
c1d10adb | 1267 | nf_conntrack_free(ct); |
f0a3c086 | 1268 | return ERR_PTR(err); |
c1d10adb PNA |
1269 | } |
1270 | ||
601e68e1 YH |
1271 | static int |
1272 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1273 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1274 | { |
1275 | struct nf_conntrack_tuple otuple, rtuple; | |
1276 | struct nf_conntrack_tuple_hash *h = NULL; | |
1277 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1278 | u_int8_t u3 = nfmsg->nfgen_family; | |
1279 | int err = 0; | |
1280 | ||
df6fb868 | 1281 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1282 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1283 | if (err < 0) | |
1284 | return err; | |
1285 | } | |
1286 | ||
df6fb868 | 1287 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1288 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1289 | if (err < 0) | |
1290 | return err; | |
1291 | } | |
1292 | ||
f8ba1aff | 1293 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1294 | if (cda[CTA_TUPLE_ORIG]) |
400dad39 | 1295 | h = __nf_conntrack_find(&init_net, &otuple); |
df6fb868 | 1296 | else if (cda[CTA_TUPLE_REPLY]) |
400dad39 | 1297 | h = __nf_conntrack_find(&init_net, &rtuple); |
c1d10adb PNA |
1298 | |
1299 | if (h == NULL) { | |
c1d10adb | 1300 | err = -ENOENT; |
f0a3c086 PNA |
1301 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1302 | struct nf_conn *ct; | |
1303 | ||
1304 | ct = ctnetlink_create_conntrack(cda, &otuple, | |
1305 | &rtuple, u3); | |
1306 | if (IS_ERR(ct)) { | |
1307 | err = PTR_ERR(ct); | |
1308 | goto out_unlock; | |
1309 | } | |
1310 | err = 0; | |
1311 | nf_conntrack_get(&ct->ct_general); | |
1312 | spin_unlock_bh(&nf_conntrack_lock); | |
1313 | ctnetlink_event_report(ct, | |
1314 | NETLINK_CB(skb).pid, | |
1315 | nlmsg_report(nlh)); | |
1316 | nf_ct_put(ct); | |
1317 | } else | |
1318 | spin_unlock_bh(&nf_conntrack_lock); | |
1319 | ||
c1d10adb PNA |
1320 | return err; |
1321 | } | |
1322 | /* implicit 'else' */ | |
1323 | ||
c1d10adb PNA |
1324 | /* We manipulate the conntrack inside the global conntrack table lock, |
1325 | * so there's no need to increase the refcount */ | |
c1d10adb | 1326 | err = -EEXIST; |
ff4ca827 | 1327 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1328 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1329 | ||
19abb7b0 PNA |
1330 | err = ctnetlink_change_conntrack(ct, cda); |
1331 | if (err == 0) { | |
1332 | nf_conntrack_get(&ct->ct_general); | |
1333 | spin_unlock_bh(&nf_conntrack_lock); | |
1334 | ctnetlink_event_report(ct, | |
1335 | NETLINK_CB(skb).pid, | |
1336 | nlmsg_report(nlh)); | |
1337 | nf_ct_put(ct); | |
1338 | } else | |
1339 | spin_unlock_bh(&nf_conntrack_lock); | |
1340 | ||
1341 | return err; | |
ff4ca827 | 1342 | } |
c1d10adb PNA |
1343 | |
1344 | out_unlock: | |
f8ba1aff | 1345 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1346 | return err; |
1347 | } | |
1348 | ||
601e68e1 YH |
1349 | /*********************************************************************** |
1350 | * EXPECT | |
1351 | ***********************************************************************/ | |
c1d10adb PNA |
1352 | |
1353 | static inline int | |
1354 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1355 | const struct nf_conntrack_tuple *tuple, | |
1356 | enum ctattr_expect type) | |
1357 | { | |
df6fb868 | 1358 | struct nlattr *nest_parms; |
601e68e1 | 1359 | |
df6fb868 PM |
1360 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1361 | if (!nest_parms) | |
1362 | goto nla_put_failure; | |
c1d10adb | 1363 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1364 | goto nla_put_failure; |
1365 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1366 | |
1367 | return 0; | |
1368 | ||
df6fb868 | 1369 | nla_put_failure: |
c1d10adb | 1370 | return -1; |
601e68e1 | 1371 | } |
c1d10adb | 1372 | |
1cde6436 PNA |
1373 | static inline int |
1374 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1375 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1376 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1377 | { |
1378 | int ret; | |
1379 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1380 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1381 | struct nf_conntrack_tuple m; |
df6fb868 | 1382 | struct nlattr *nest_parms; |
d4156e8c PM |
1383 | |
1384 | memset(&m, 0xFF, sizeof(m)); | |
1385 | m.src.u.all = mask->src.u.all; | |
1386 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1387 | ||
df6fb868 PM |
1388 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1389 | if (!nest_parms) | |
1390 | goto nla_put_failure; | |
1cde6436 | 1391 | |
528a3a6f | 1392 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1393 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1394 | |
1395 | if (unlikely(ret < 0)) | |
df6fb868 | 1396 | goto nla_put_failure; |
1cde6436 | 1397 | |
528a3a6f | 1398 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1399 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1400 | if (unlikely(ret < 0)) |
df6fb868 | 1401 | goto nla_put_failure; |
1cde6436 | 1402 | |
df6fb868 | 1403 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1404 | |
1405 | return 0; | |
1406 | ||
df6fb868 | 1407 | nla_put_failure: |
1cde6436 PNA |
1408 | return -1; |
1409 | } | |
1410 | ||
bb5cf80e | 1411 | static int |
c1d10adb | 1412 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1413 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1414 | { |
1415 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1416 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1417 | ||
1418 | if (timeout < 0) | |
1419 | timeout = 0; | |
c1d10adb PNA |
1420 | |
1421 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1422 | goto nla_put_failure; |
1cde6436 | 1423 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1424 | goto nla_put_failure; |
c1d10adb PNA |
1425 | if (ctnetlink_exp_dump_tuple(skb, |
1426 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1427 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1428 | goto nla_put_failure; |
601e68e1 | 1429 | |
d978e5da | 1430 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1431 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1432 | |
1433 | return 0; | |
601e68e1 | 1434 | |
df6fb868 | 1435 | nla_put_failure: |
c1d10adb PNA |
1436 | return -1; |
1437 | } | |
1438 | ||
1439 | static int | |
1440 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 YH |
1441 | int event, |
1442 | int nowait, | |
c1d10adb PNA |
1443 | const struct nf_conntrack_expect *exp) |
1444 | { | |
1445 | struct nlmsghdr *nlh; | |
1446 | struct nfgenmsg *nfmsg; | |
27a884dc | 1447 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1448 | |
1449 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1450 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1451 | nfmsg = NLMSG_DATA(nlh); | |
1452 | ||
1453 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
1454 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1455 | nfmsg->version = NFNETLINK_V0; | |
1456 | nfmsg->res_id = 0; | |
1457 | ||
1458 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1459 | goto nla_put_failure; |
c1d10adb | 1460 | |
27a884dc | 1461 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1462 | return skb->len; |
1463 | ||
1464 | nlmsg_failure: | |
df6fb868 | 1465 | nla_put_failure: |
dc5fc579 | 1466 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1467 | return -1; |
1468 | } | |
1469 | ||
1470 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1471 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1472 | unsigned long events, void *ptr) | |
1473 | { | |
1474 | struct nlmsghdr *nlh; | |
1475 | struct nfgenmsg *nfmsg; | |
19abb7b0 PNA |
1476 | struct nf_exp_event *item = (struct nf_exp_event *)ptr; |
1477 | struct nf_conntrack_expect *exp = item->exp; | |
c1d10adb PNA |
1478 | struct sk_buff *skb; |
1479 | unsigned int type; | |
27a884dc | 1480 | sk_buff_data_t b; |
c1d10adb PNA |
1481 | int flags = 0; |
1482 | ||
1483 | if (events & IPEXP_NEW) { | |
1484 | type = IPCTNL_MSG_EXP_NEW; | |
1485 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1486 | } else | |
1487 | return NOTIFY_DONE; | |
1488 | ||
1f9da256 PNA |
1489 | if (!item->report && |
1490 | !nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) | |
b3a27bfb PNA |
1491 | return NOTIFY_DONE; |
1492 | ||
c1d10adb PNA |
1493 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1494 | if (!skb) | |
1495 | return NOTIFY_DONE; | |
1496 | ||
1497 | b = skb->tail; | |
1498 | ||
b633ad5f | 1499 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
19abb7b0 | 1500 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
1501 | nfmsg = NLMSG_DATA(nlh); |
1502 | ||
1503 | nlh->nlmsg_flags = flags; | |
1504 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1505 | nfmsg->version = NFNETLINK_V0; | |
1506 | nfmsg->res_id = 0; | |
1507 | ||
528a3a6f | 1508 | rcu_read_lock(); |
c1d10adb | 1509 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1510 | goto nla_put_failure; |
528a3a6f | 1511 | rcu_read_unlock(); |
c1d10adb PNA |
1512 | |
1513 | nlh->nlmsg_len = skb->tail - b; | |
19abb7b0 | 1514 | nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report); |
c1d10adb PNA |
1515 | return NOTIFY_DONE; |
1516 | ||
df6fb868 | 1517 | nla_put_failure: |
528a3a6f PNA |
1518 | rcu_read_unlock(); |
1519 | nlmsg_failure: | |
dd5b6ce6 | 1520 | nfnetlink_set_err(0, 0, -ENOBUFS); |
c1d10adb PNA |
1521 | kfree_skb(skb); |
1522 | return NOTIFY_DONE; | |
1523 | } | |
1524 | #endif | |
cf6994c2 PM |
1525 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1526 | { | |
31f15875 PM |
1527 | if (cb->args[1]) |
1528 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1529 | return 0; |
1530 | } | |
c1d10adb PNA |
1531 | |
1532 | static int | |
1533 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1534 | { | |
9b03f38d | 1535 | struct net *net = &init_net; |
cf6994c2 | 1536 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1537 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1538 | struct hlist_node *n; |
87711cb8 | 1539 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1540 | |
7d0742da | 1541 | rcu_read_lock(); |
31f15875 PM |
1542 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1543 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1544 | restart: |
9b03f38d | 1545 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1546 | hnode) { |
1547 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1548 | continue; |
31f15875 PM |
1549 | if (cb->args[1]) { |
1550 | if (exp != last) | |
1551 | continue; | |
1552 | cb->args[1] = 0; | |
1553 | } | |
1554 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, | |
1555 | cb->nlh->nlmsg_seq, | |
1556 | IPCTNL_MSG_EXP_NEW, | |
1557 | 1, exp) < 0) { | |
7d0742da PM |
1558 | if (!atomic_inc_not_zero(&exp->use)) |
1559 | continue; | |
31f15875 PM |
1560 | cb->args[1] = (unsigned long)exp; |
1561 | goto out; | |
1562 | } | |
cf6994c2 | 1563 | } |
31f15875 PM |
1564 | if (cb->args[1]) { |
1565 | cb->args[1] = 0; | |
1566 | goto restart; | |
cf6994c2 PM |
1567 | } |
1568 | } | |
601e68e1 | 1569 | out: |
7d0742da | 1570 | rcu_read_unlock(); |
cf6994c2 PM |
1571 | if (last) |
1572 | nf_ct_expect_put(last); | |
c1d10adb | 1573 | |
c1d10adb PNA |
1574 | return skb->len; |
1575 | } | |
1576 | ||
f73e924c PM |
1577 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1578 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1579 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1580 | }; |
1581 | ||
1582 | static int | |
601e68e1 | 1583 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1584 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1585 | { |
1586 | struct nf_conntrack_tuple tuple; | |
1587 | struct nf_conntrack_expect *exp; | |
1588 | struct sk_buff *skb2; | |
1589 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1590 | u_int8_t u3 = nfmsg->nfgen_family; | |
1591 | int err = 0; | |
1592 | ||
c1d10adb | 1593 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1594 | return netlink_dump_start(ctnl, skb, nlh, |
1595 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1596 | ctnetlink_exp_done); |
c1d10adb PNA |
1597 | } |
1598 | ||
df6fb868 | 1599 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1600 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1601 | else | |
1602 | return -EINVAL; | |
1603 | ||
1604 | if (err < 0) | |
1605 | return err; | |
1606 | ||
9b03f38d | 1607 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1608 | if (!exp) |
1609 | return -ENOENT; | |
1610 | ||
df6fb868 | 1611 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1612 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1613 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1614 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1615 | return -ENOENT; |
1616 | } | |
601e68e1 | 1617 | } |
c1d10adb PNA |
1618 | |
1619 | err = -ENOMEM; | |
1620 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1621 | if (!skb2) | |
1622 | goto out; | |
4e9b8269 | 1623 | |
528a3a6f | 1624 | rcu_read_lock(); |
601e68e1 | 1625 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
c1d10adb PNA |
1626 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
1627 | 1, exp); | |
528a3a6f | 1628 | rcu_read_unlock(); |
c1d10adb PNA |
1629 | if (err <= 0) |
1630 | goto free; | |
1631 | ||
6823645d | 1632 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1633 | |
1634 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1635 | ||
1636 | free: | |
1637 | kfree_skb(skb2); | |
1638 | out: | |
6823645d | 1639 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1640 | return err; |
1641 | } | |
1642 | ||
1643 | static int | |
601e68e1 | 1644 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1645 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1646 | { |
31f15875 | 1647 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1648 | struct nf_conntrack_tuple tuple; |
1649 | struct nf_conntrack_helper *h; | |
1650 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1651 | struct hlist_node *n, *next; |
c1d10adb | 1652 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1653 | unsigned int i; |
c1d10adb PNA |
1654 | int err; |
1655 | ||
df6fb868 | 1656 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1657 | /* delete a single expect by tuple */ |
1658 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1659 | if (err < 0) | |
1660 | return err; | |
1661 | ||
1662 | /* bump usage count to 2 */ | |
9b03f38d | 1663 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1664 | if (!exp) |
1665 | return -ENOENT; | |
1666 | ||
df6fb868 | 1667 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1668 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1669 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1670 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1671 | return -ENOENT; |
1672 | } | |
1673 | } | |
1674 | ||
1675 | /* after list removal, usage count == 1 */ | |
6823645d | 1676 | nf_ct_unexpect_related(exp); |
601e68e1 | 1677 | /* have to put what we 'get' above. |
c1d10adb | 1678 | * after this line usage count == 0 */ |
6823645d | 1679 | nf_ct_expect_put(exp); |
df6fb868 PM |
1680 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1681 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1682 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1683 | |
1684 | /* delete all expectations for this helper */ | |
f8ba1aff | 1685 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1686 | h = __nf_conntrack_helper_find_byname(name); |
1687 | if (!h) { | |
f8ba1aff | 1688 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1689 | return -EOPNOTSUPP; |
c1d10adb | 1690 | } |
31f15875 PM |
1691 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1692 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1693 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1694 | hnode) { |
1695 | m_help = nfct_help(exp->master); | |
1696 | if (m_help->helper == h | |
1697 | && del_timer(&exp->timeout)) { | |
1698 | nf_ct_unlink_expect(exp); | |
1699 | nf_ct_expect_put(exp); | |
1700 | } | |
c1d10adb PNA |
1701 | } |
1702 | } | |
f8ba1aff | 1703 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1704 | } else { |
1705 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1706 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1707 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1708 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1709 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1710 | hnode) { |
1711 | if (del_timer(&exp->timeout)) { | |
1712 | nf_ct_unlink_expect(exp); | |
1713 | nf_ct_expect_put(exp); | |
1714 | } | |
c1d10adb PNA |
1715 | } |
1716 | } | |
f8ba1aff | 1717 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1718 | } |
1719 | ||
1720 | return 0; | |
1721 | } | |
1722 | static int | |
df6fb868 | 1723 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1724 | { |
1725 | return -EOPNOTSUPP; | |
1726 | } | |
1727 | ||
1728 | static int | |
19abb7b0 | 1729 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) |
c1d10adb PNA |
1730 | { |
1731 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1732 | struct nf_conntrack_tuple_hash *h = NULL; | |
1733 | struct nf_conntrack_expect *exp; | |
1734 | struct nf_conn *ct; | |
dc808fe2 | 1735 | struct nf_conn_help *help; |
c1d10adb PNA |
1736 | int err = 0; |
1737 | ||
c1d10adb PNA |
1738 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1739 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1740 | if (err < 0) | |
1741 | return err; | |
1742 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1743 | if (err < 0) | |
1744 | return err; | |
1745 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1746 | if (err < 0) | |
1747 | return err; | |
1748 | ||
1749 | /* Look for master conntrack of this expectation */ | |
400dad39 | 1750 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
c1d10adb PNA |
1751 | if (!h) |
1752 | return -ENOENT; | |
1753 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1754 | help = nfct_help(ct); |
c1d10adb | 1755 | |
dc808fe2 | 1756 | if (!help || !help->helper) { |
c1d10adb | 1757 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1758 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1759 | goto out; |
1760 | } | |
1761 | ||
6823645d | 1762 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1763 | if (!exp) { |
1764 | err = -ENOMEM; | |
1765 | goto out; | |
1766 | } | |
601e68e1 | 1767 | |
c1d10adb PNA |
1768 | exp->expectfn = NULL; |
1769 | exp->flags = 0; | |
1770 | exp->master = ct; | |
9457d851 | 1771 | exp->helper = NULL; |
c1d10adb | 1772 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1773 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1774 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1775 | |
19abb7b0 | 1776 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1777 | nf_ct_expect_put(exp); |
c1d10adb | 1778 | |
601e68e1 | 1779 | out: |
c1d10adb PNA |
1780 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1781 | return err; | |
1782 | } | |
1783 | ||
1784 | static int | |
1785 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1786 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1787 | { |
1788 | struct nf_conntrack_tuple tuple; | |
1789 | struct nf_conntrack_expect *exp; | |
1790 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1791 | u_int8_t u3 = nfmsg->nfgen_family; | |
1792 | int err = 0; | |
1793 | ||
df6fb868 PM |
1794 | if (!cda[CTA_EXPECT_TUPLE] |
1795 | || !cda[CTA_EXPECT_MASK] | |
1796 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1797 | return -EINVAL; |
1798 | ||
1799 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1800 | if (err < 0) | |
1801 | return err; | |
1802 | ||
f8ba1aff | 1803 | spin_lock_bh(&nf_conntrack_lock); |
9b03f38d | 1804 | exp = __nf_ct_expect_find(&init_net, &tuple); |
c1d10adb PNA |
1805 | |
1806 | if (!exp) { | |
f8ba1aff | 1807 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1808 | err = -ENOENT; |
19abb7b0 PNA |
1809 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1810 | err = ctnetlink_create_expect(cda, | |
1811 | u3, | |
1812 | NETLINK_CB(skb).pid, | |
1813 | nlmsg_report(nlh)); | |
1814 | } | |
c1d10adb PNA |
1815 | return err; |
1816 | } | |
1817 | ||
1818 | err = -EEXIST; | |
1819 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1820 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1821 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1822 | |
c1d10adb PNA |
1823 | return err; |
1824 | } | |
1825 | ||
1826 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1827 | static struct notifier_block ctnl_notifier = { | |
1828 | .notifier_call = ctnetlink_conntrack_event, | |
1829 | }; | |
1830 | ||
1831 | static struct notifier_block ctnl_notifier_exp = { | |
1832 | .notifier_call = ctnetlink_expect_event, | |
1833 | }; | |
1834 | #endif | |
1835 | ||
7c8d4cb4 | 1836 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1837 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1838 | .attr_count = CTA_MAX, |
1839 | .policy = ct_nla_policy }, | |
c1d10adb | 1840 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1841 | .attr_count = CTA_MAX, |
1842 | .policy = ct_nla_policy }, | |
c1d10adb | 1843 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1844 | .attr_count = CTA_MAX, |
1845 | .policy = ct_nla_policy }, | |
c1d10adb | 1846 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1847 | .attr_count = CTA_MAX, |
1848 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1849 | }; |
1850 | ||
7c8d4cb4 | 1851 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1852 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1853 | .attr_count = CTA_EXPECT_MAX, |
1854 | .policy = exp_nla_policy }, | |
c1d10adb | 1855 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1856 | .attr_count = CTA_EXPECT_MAX, |
1857 | .policy = exp_nla_policy }, | |
c1d10adb | 1858 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1859 | .attr_count = CTA_EXPECT_MAX, |
1860 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1861 | }; |
1862 | ||
7c8d4cb4 | 1863 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1864 | .name = "conntrack", |
1865 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1866 | .cb_count = IPCTNL_MSG_MAX, | |
1867 | .cb = ctnl_cb, | |
1868 | }; | |
1869 | ||
7c8d4cb4 | 1870 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1871 | .name = "conntrack_expect", |
1872 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1873 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1874 | .cb = ctnl_exp_cb, | |
1875 | }; | |
1876 | ||
d2483dde | 1877 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1878 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1879 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1880 | |
1881 | static int __init ctnetlink_init(void) | |
1882 | { | |
1883 | int ret; | |
1884 | ||
1885 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1886 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1887 | if (ret < 0) { | |
1888 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1889 | goto err_out; | |
1890 | } | |
1891 | ||
1892 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1893 | if (ret < 0) { | |
1894 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1895 | goto err_unreg_subsys; | |
1896 | } | |
1897 | ||
1898 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1899 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1900 | if (ret < 0) { | |
1901 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1902 | goto err_unreg_exp_subsys; | |
1903 | } | |
1904 | ||
6823645d | 1905 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1906 | if (ret < 0) { |
1907 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1908 | goto err_unreg_notifier; | |
1909 | } | |
1910 | #endif | |
1911 | ||
1912 | return 0; | |
1913 | ||
1914 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1915 | err_unreg_notifier: | |
1916 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1917 | err_unreg_exp_subsys: | |
1918 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1919 | #endif | |
1920 | err_unreg_subsys: | |
1921 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1922 | err_out: | |
1923 | return ret; | |
1924 | } | |
1925 | ||
1926 | static void __exit ctnetlink_exit(void) | |
1927 | { | |
1928 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1929 | ||
1930 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1931 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1932 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1933 | #endif | |
1934 | ||
1935 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1936 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1937 | return; | |
1938 | } | |
1939 | ||
1940 | module_init(ctnetlink_init); | |
1941 | module_exit(ctnetlink_exit); |