Commit | Line | Data |
---|---|---|
c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
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 | 39 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 40 | #include <net/netfilter/nf_conntrack_acct.h> |
5b1158e9 JK |
41 | #ifdef CONFIG_NF_NAT_NEEDED |
42 | #include <net/netfilter/nf_nat_core.h> | |
43 | #include <net/netfilter/nf_nat_protocol.h> | |
44 | #endif | |
c1d10adb PNA |
45 | |
46 | #include <linux/netfilter/nfnetlink.h> | |
47 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
48 | ||
49 | MODULE_LICENSE("GPL"); | |
50 | ||
dc808fe2 | 51 | static char __initdata version[] = "0.93"; |
c1d10adb | 52 | |
c1d10adb | 53 | static inline int |
601e68e1 | 54 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 55 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 56 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 57 | { |
c1d10adb | 58 | int ret = 0; |
df6fb868 | 59 | struct nlattr *nest_parms; |
c1d10adb | 60 | |
df6fb868 PM |
61 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
62 | if (!nest_parms) | |
63 | goto nla_put_failure; | |
77236b6e | 64 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 65 | |
fdf70832 PM |
66 | if (likely(l4proto->tuple_to_nlattr)) |
67 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 68 | |
df6fb868 | 69 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
70 | |
71 | return ret; | |
72 | ||
df6fb868 | 73 | nla_put_failure: |
c1d10adb PNA |
74 | return -1; |
75 | } | |
76 | ||
77 | static inline int | |
1cde6436 PNA |
78 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
79 | const struct nf_conntrack_tuple *tuple, | |
80 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 81 | { |
c1d10adb | 82 | int ret = 0; |
df6fb868 PM |
83 | struct nlattr *nest_parms; |
84 | ||
85 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
86 | if (!nest_parms) | |
87 | goto nla_put_failure; | |
1cde6436 | 88 | |
fdf70832 PM |
89 | if (likely(l3proto->tuple_to_nlattr)) |
90 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 91 | |
df6fb868 | 92 | nla_nest_end(skb, nest_parms); |
c1d10adb | 93 | |
1cde6436 PNA |
94 | return ret; |
95 | ||
df6fb868 | 96 | nla_put_failure: |
1cde6436 PNA |
97 | return -1; |
98 | } | |
99 | ||
bb5cf80e | 100 | static int |
1cde6436 PNA |
101 | ctnetlink_dump_tuples(struct sk_buff *skb, |
102 | const struct nf_conntrack_tuple *tuple) | |
103 | { | |
104 | int ret; | |
105 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 106 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 107 | |
528a3a6f | 108 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 109 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
110 | |
111 | if (unlikely(ret < 0)) | |
112 | return ret; | |
113 | ||
528a3a6f | 114 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 115 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
116 | |
117 | return ret; | |
c1d10adb PNA |
118 | } |
119 | ||
120 | static inline int | |
121 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
122 | { | |
77236b6e | 123 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
124 | return 0; |
125 | ||
df6fb868 | 126 | nla_put_failure: |
c1d10adb PNA |
127 | return -1; |
128 | } | |
129 | ||
130 | static inline int | |
131 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
132 | { | |
77236b6e | 133 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 134 | |
77236b6e | 135 | if (timeout < 0) |
c1d10adb | 136 | timeout = 0; |
601e68e1 | 137 | |
77236b6e | 138 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
139 | return 0; |
140 | ||
df6fb868 | 141 | nla_put_failure: |
c1d10adb PNA |
142 | return -1; |
143 | } | |
144 | ||
145 | static inline int | |
146 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
147 | { | |
5e8fbe2a | 148 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 149 | struct nlattr *nest_proto; |
c1d10adb PNA |
150 | int ret; |
151 | ||
528a3a6f PNA |
152 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
153 | if (!l4proto->to_nlattr) | |
c1d10adb | 154 | return 0; |
601e68e1 | 155 | |
df6fb868 PM |
156 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
157 | if (!nest_proto) | |
158 | goto nla_put_failure; | |
c1d10adb | 159 | |
fdf70832 | 160 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 161 | |
df6fb868 | 162 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
163 | |
164 | return ret; | |
165 | ||
df6fb868 | 166 | nla_put_failure: |
c1d10adb PNA |
167 | return -1; |
168 | } | |
169 | ||
170 | static inline int | |
171 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
172 | { | |
df6fb868 | 173 | struct nlattr *nest_helper; |
dc808fe2 | 174 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 175 | struct nf_conntrack_helper *helper; |
c1d10adb | 176 | |
3c158f7f | 177 | if (!help) |
c1d10adb | 178 | return 0; |
601e68e1 | 179 | |
3c158f7f PM |
180 | helper = rcu_dereference(help->helper); |
181 | if (!helper) | |
182 | goto out; | |
183 | ||
df6fb868 PM |
184 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
185 | if (!nest_helper) | |
186 | goto nla_put_failure; | |
77236b6e | 187 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 188 | |
fdf70832 PM |
189 | if (helper->to_nlattr) |
190 | helper->to_nlattr(skb, ct); | |
c1d10adb | 191 | |
df6fb868 | 192 | nla_nest_end(skb, nest_helper); |
3c158f7f | 193 | out: |
c1d10adb PNA |
194 | return 0; |
195 | ||
df6fb868 | 196 | nla_put_failure: |
c1d10adb PNA |
197 | return -1; |
198 | } | |
199 | ||
bb5cf80e | 200 | static int |
c1d10adb PNA |
201 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
202 | enum ip_conntrack_dir dir) | |
203 | { | |
204 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 205 | struct nlattr *nest_count; |
58401572 KPO |
206 | const struct nf_conn_counter *acct; |
207 | ||
208 | acct = nf_conn_acct_find(ct); | |
209 | if (!acct) | |
210 | return 0; | |
c1d10adb | 211 | |
df6fb868 PM |
212 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
213 | if (!nest_count) | |
214 | goto nla_put_failure; | |
215 | ||
58401572 KPO |
216 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
217 | cpu_to_be64(acct[dir].packets)); | |
218 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
219 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 220 | |
df6fb868 | 221 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
222 | |
223 | return 0; | |
224 | ||
df6fb868 | 225 | nla_put_failure: |
c1d10adb PNA |
226 | return -1; |
227 | } | |
c1d10adb PNA |
228 | |
229 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
230 | static inline int | |
231 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
232 | { | |
77236b6e | 233 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
234 | return 0; |
235 | ||
df6fb868 | 236 | nla_put_failure: |
c1d10adb PNA |
237 | return -1; |
238 | } | |
239 | #else | |
240 | #define ctnetlink_dump_mark(a, b) (0) | |
241 | #endif | |
242 | ||
37fccd85 PNA |
243 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
244 | static inline int | |
245 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
246 | { | |
77236b6e | 247 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
248 | return 0; |
249 | ||
250 | nla_put_failure: | |
251 | return -1; | |
252 | } | |
253 | #else | |
254 | #define ctnetlink_dump_secmark(a, b) (0) | |
255 | #endif | |
256 | ||
0f417ce9 PNA |
257 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
258 | ||
259 | static inline int | |
260 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
261 | { | |
262 | struct nlattr *nest_parms; | |
263 | ||
264 | if (!(ct->status & IPS_EXPECTED)) | |
265 | return 0; | |
266 | ||
267 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
268 | if (!nest_parms) | |
269 | goto nla_put_failure; | |
270 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
271 | goto nla_put_failure; | |
272 | nla_nest_end(skb, nest_parms); | |
273 | ||
274 | return 0; | |
275 | ||
276 | nla_put_failure: | |
277 | return -1; | |
278 | } | |
279 | ||
13eae15a | 280 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 281 | static int |
13eae15a PNA |
282 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
283 | { | |
13eae15a PNA |
284 | struct nlattr *nest_parms; |
285 | ||
286 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
287 | if (!nest_parms) | |
288 | goto nla_put_failure; | |
289 | ||
77236b6e PM |
290 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
291 | htonl(natseq->correction_pos)); | |
292 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
293 | htonl(natseq->offset_before)); | |
294 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
295 | htonl(natseq->offset_after)); | |
13eae15a PNA |
296 | |
297 | nla_nest_end(skb, nest_parms); | |
298 | ||
299 | return 0; | |
300 | ||
301 | nla_put_failure: | |
302 | return -1; | |
303 | } | |
304 | ||
305 | static inline int | |
306 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
307 | { | |
308 | struct nf_nat_seq *natseq; | |
309 | struct nf_conn_nat *nat = nfct_nat(ct); | |
310 | ||
311 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
312 | return 0; | |
313 | ||
314 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
315 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
316 | return -1; | |
317 | ||
318 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
319 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
320 | return -1; | |
321 | ||
322 | return 0; | |
323 | } | |
324 | #else | |
325 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
326 | #endif | |
327 | ||
c1d10adb PNA |
328 | static inline int |
329 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
330 | { | |
77236b6e | 331 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
332 | return 0; |
333 | ||
df6fb868 | 334 | nla_put_failure: |
c1d10adb PNA |
335 | return -1; |
336 | } | |
337 | ||
338 | static inline int | |
339 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
340 | { | |
77236b6e | 341 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
342 | return 0; |
343 | ||
df6fb868 | 344 | nla_put_failure: |
c1d10adb PNA |
345 | return -1; |
346 | } | |
347 | ||
348 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) | |
349 | ||
350 | static int | |
351 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 | 352 | int event, int nowait, |
c1d10adb PNA |
353 | const struct nf_conn *ct) |
354 | { | |
355 | struct nlmsghdr *nlh; | |
356 | struct nfgenmsg *nfmsg; | |
df6fb868 | 357 | struct nlattr *nest_parms; |
27a884dc | 358 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
359 | |
360 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
361 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
362 | nfmsg = NLMSG_DATA(nlh); | |
363 | ||
364 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
5e8fbe2a | 365 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
366 | nfmsg->version = NFNETLINK_V0; |
367 | nfmsg->res_id = 0; | |
368 | ||
df6fb868 PM |
369 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
370 | if (!nest_parms) | |
371 | goto nla_put_failure; | |
c1d10adb | 372 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
373 | goto nla_put_failure; |
374 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 375 | |
df6fb868 PM |
376 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
377 | if (!nest_parms) | |
378 | goto nla_put_failure; | |
c1d10adb | 379 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
380 | goto nla_put_failure; |
381 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
382 | |
383 | if (ctnetlink_dump_status(skb, ct) < 0 || | |
384 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
385 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
386 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
387 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
388 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
389 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 390 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 391 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 392 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 393 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 394 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 395 | goto nla_put_failure; |
c1d10adb | 396 | |
27a884dc | 397 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
398 | return skb->len; |
399 | ||
400 | nlmsg_failure: | |
df6fb868 | 401 | nla_put_failure: |
dc5fc579 | 402 | nlmsg_trim(skb, b); |
c1d10adb PNA |
403 | return -1; |
404 | } | |
405 | ||
406 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
407 | static int ctnetlink_conntrack_event(struct notifier_block *this, | |
601e68e1 | 408 | unsigned long events, void *ptr) |
c1d10adb PNA |
409 | { |
410 | struct nlmsghdr *nlh; | |
411 | struct nfgenmsg *nfmsg; | |
df6fb868 | 412 | struct nlattr *nest_parms; |
19abb7b0 PNA |
413 | struct nf_ct_event *item = (struct nf_ct_event *)ptr; |
414 | struct nf_conn *ct = item->ct; | |
c1d10adb PNA |
415 | struct sk_buff *skb; |
416 | unsigned int type; | |
27a884dc | 417 | sk_buff_data_t b; |
c1d10adb PNA |
418 | unsigned int flags = 0, group; |
419 | ||
420 | /* ignore our fake conntrack entry */ | |
421 | if (ct == &nf_conntrack_untracked) | |
422 | return NOTIFY_DONE; | |
423 | ||
424 | if (events & IPCT_DESTROY) { | |
425 | type = IPCTNL_MSG_CT_DELETE; | |
426 | group = NFNLGRP_CONNTRACK_DESTROY; | |
427 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { | |
428 | type = IPCTNL_MSG_CT_NEW; | |
429 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 430 | group = NFNLGRP_CONNTRACK_NEW; |
1a31526b | 431 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
c1d10adb PNA |
432 | type = IPCTNL_MSG_CT_NEW; |
433 | group = NFNLGRP_CONNTRACK_UPDATE; | |
434 | } else | |
435 | return NOTIFY_DONE; | |
a2427692 PM |
436 | |
437 | if (!nfnetlink_has_listeners(group)) | |
438 | return NOTIFY_DONE; | |
439 | ||
c1d10adb PNA |
440 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
441 | if (!skb) | |
442 | return NOTIFY_DONE; | |
443 | ||
444 | b = skb->tail; | |
445 | ||
446 | type |= NFNL_SUBSYS_CTNETLINK << 8; | |
19abb7b0 | 447 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
448 | nfmsg = NLMSG_DATA(nlh); |
449 | ||
450 | nlh->nlmsg_flags = flags; | |
5e8fbe2a | 451 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
452 | nfmsg->version = NFNETLINK_V0; |
453 | nfmsg->res_id = 0; | |
454 | ||
528a3a6f | 455 | rcu_read_lock(); |
df6fb868 PM |
456 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
457 | if (!nest_parms) | |
458 | goto nla_put_failure; | |
c1d10adb | 459 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
460 | goto nla_put_failure; |
461 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 462 | |
df6fb868 PM |
463 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
464 | if (!nest_parms) | |
465 | goto nla_put_failure; | |
c1d10adb | 466 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
467 | goto nla_put_failure; |
468 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 469 | |
1eedf699 EL |
470 | if (ctnetlink_dump_id(skb, ct) < 0) |
471 | goto nla_put_failure; | |
472 | ||
e57dce60 FH |
473 | if (ctnetlink_dump_status(skb, ct) < 0) |
474 | goto nla_put_failure; | |
475 | ||
7b621c1e PNA |
476 | if (events & IPCT_DESTROY) { |
477 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
478 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 479 | goto nla_put_failure; |
7b621c1e | 480 | } else { |
7b621c1e | 481 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 482 | goto nla_put_failure; |
7b621c1e PNA |
483 | |
484 | if (events & IPCT_PROTOINFO | |
485 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 486 | goto nla_put_failure; |
7b621c1e PNA |
487 | |
488 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
489 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 490 | goto nla_put_failure; |
7b621c1e | 491 | |
37fccd85 PNA |
492 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
493 | if ((events & IPCT_SECMARK || ct->secmark) | |
494 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
495 | goto nla_put_failure; | |
496 | #endif | |
7b621c1e | 497 | |
0f417ce9 PNA |
498 | if (events & IPCT_RELATED && |
499 | ctnetlink_dump_master(skb, ct) < 0) | |
500 | goto nla_put_failure; | |
501 | ||
13eae15a PNA |
502 | if (events & IPCT_NATSEQADJ && |
503 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
504 | goto nla_put_failure; | |
7b621c1e | 505 | } |
b9a37e0c | 506 | |
a83099a6 EL |
507 | #ifdef CONFIG_NF_CONNTRACK_MARK |
508 | if ((events & IPCT_MARK || ct->mark) | |
509 | && ctnetlink_dump_mark(skb, ct) < 0) | |
510 | goto nla_put_failure; | |
511 | #endif | |
528a3a6f | 512 | rcu_read_unlock(); |
a83099a6 | 513 | |
c1d10adb | 514 | nlh->nlmsg_len = skb->tail - b; |
19abb7b0 | 515 | nfnetlink_send(skb, item->pid, group, item->report); |
c1d10adb PNA |
516 | return NOTIFY_DONE; |
517 | ||
df6fb868 | 518 | nla_put_failure: |
528a3a6f PNA |
519 | rcu_read_unlock(); |
520 | nlmsg_failure: | |
c1d10adb PNA |
521 | kfree_skb(skb); |
522 | return NOTIFY_DONE; | |
523 | } | |
524 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
525 | ||
526 | static int ctnetlink_done(struct netlink_callback *cb) | |
527 | { | |
89f2e218 PM |
528 | if (cb->args[1]) |
529 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
530 | return 0; |
531 | } | |
532 | ||
533 | static int | |
534 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
535 | { | |
89f2e218 | 536 | struct nf_conn *ct, *last; |
c1d10adb | 537 | struct nf_conntrack_tuple_hash *h; |
f205c5e0 | 538 | struct hlist_node *n; |
87711cb8 PNA |
539 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
540 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 541 | |
76507f69 | 542 | rcu_read_lock(); |
d205dc40 | 543 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
544 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
545 | restart: | |
400dad39 | 546 | hlist_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
76507f69 | 547 | hnode) { |
5b1158e9 | 548 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
549 | continue; |
550 | ct = nf_ct_tuplehash_to_ctrack(h); | |
87711cb8 PNA |
551 | /* Dump entries of a given L3 protocol number. |
552 | * If it is not specified, ie. l3proto == 0, | |
553 | * then dump everything. */ | |
5e8fbe2a | 554 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
87711cb8 | 555 | continue; |
d205dc40 PM |
556 | if (cb->args[1]) { |
557 | if (ct != last) | |
89f2e218 | 558 | continue; |
d205dc40 | 559 | cb->args[1] = 0; |
89f2e218 | 560 | } |
c1d10adb | 561 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 562 | cb->nlh->nlmsg_seq, |
c1d10adb | 563 | IPCTNL_MSG_CT_NEW, |
89f2e218 | 564 | 1, ct) < 0) { |
76507f69 PM |
565 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
566 | continue; | |
89f2e218 | 567 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 568 | goto out; |
89f2e218 | 569 | } |
58401572 | 570 | |
01f34848 | 571 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
572 | IPCTNL_MSG_CT_GET_CTRZERO) { |
573 | struct nf_conn_counter *acct; | |
574 | ||
575 | acct = nf_conn_acct_find(ct); | |
576 | if (acct) | |
577 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
578 | } | |
89f2e218 | 579 | } |
d205dc40 | 580 | if (cb->args[1]) { |
89f2e218 PM |
581 | cb->args[1] = 0; |
582 | goto restart; | |
c1d10adb PNA |
583 | } |
584 | } | |
89f2e218 | 585 | out: |
76507f69 | 586 | rcu_read_unlock(); |
d205dc40 PM |
587 | if (last) |
588 | nf_ct_put(last); | |
c1d10adb | 589 | |
c1d10adb PNA |
590 | return skb->len; |
591 | } | |
592 | ||
c1d10adb | 593 | static inline int |
df6fb868 | 594 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 595 | { |
df6fb868 | 596 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
597 | struct nf_conntrack_l3proto *l3proto; |
598 | int ret = 0; | |
599 | ||
df6fb868 | 600 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb PNA |
601 | |
602 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); | |
603 | ||
f73e924c PM |
604 | if (likely(l3proto->nlattr_to_tuple)) { |
605 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
606 | l3proto->nla_policy); | |
607 | if (ret == 0) | |
608 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
609 | } | |
c1d10adb PNA |
610 | |
611 | nf_ct_l3proto_put(l3proto); | |
612 | ||
c1d10adb PNA |
613 | return ret; |
614 | } | |
615 | ||
f73e924c PM |
616 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
617 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
618 | }; |
619 | ||
620 | static inline int | |
df6fb868 | 621 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
622 | struct nf_conntrack_tuple *tuple) |
623 | { | |
df6fb868 | 624 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 625 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
626 | int ret = 0; |
627 | ||
f73e924c PM |
628 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
629 | if (ret < 0) | |
630 | return ret; | |
c1d10adb | 631 | |
df6fb868 | 632 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 633 | return -EINVAL; |
77236b6e | 634 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 635 | |
605dcad6 | 636 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
c1d10adb | 637 | |
f73e924c PM |
638 | if (likely(l4proto->nlattr_to_tuple)) { |
639 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
640 | l4proto->nla_policy); | |
641 | if (ret == 0) | |
642 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
643 | } | |
c1d10adb | 644 | |
605dcad6 | 645 | nf_ct_l4proto_put(l4proto); |
601e68e1 | 646 | |
c1d10adb PNA |
647 | return ret; |
648 | } | |
649 | ||
bb5cf80e | 650 | static int |
df6fb868 | 651 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
652 | enum ctattr_tuple type, u_int8_t l3num) |
653 | { | |
df6fb868 | 654 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
655 | int err; |
656 | ||
c1d10adb PNA |
657 | memset(tuple, 0, sizeof(*tuple)); |
658 | ||
df6fb868 | 659 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 660 | |
df6fb868 | 661 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
662 | return -EINVAL; |
663 | ||
664 | tuple->src.l3num = l3num; | |
665 | ||
df6fb868 | 666 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
667 | if (err < 0) |
668 | return err; | |
669 | ||
df6fb868 | 670 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
671 | return -EINVAL; |
672 | ||
df6fb868 | 673 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
674 | if (err < 0) |
675 | return err; | |
676 | ||
677 | /* orig and expect tuples get DIR_ORIGINAL */ | |
678 | if (type == CTA_TUPLE_REPLY) | |
679 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
680 | else | |
681 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
682 | ||
c1d10adb PNA |
683 | return 0; |
684 | } | |
685 | ||
c1d10adb | 686 | static inline int |
df6fb868 | 687 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 688 | { |
df6fb868 | 689 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 690 | |
df6fb868 | 691 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 692 | |
df6fb868 | 693 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
694 | return -EINVAL; |
695 | ||
df6fb868 | 696 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
697 | |
698 | return 0; | |
699 | } | |
700 | ||
f73e924c PM |
701 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
702 | [CTA_STATUS] = { .type = NLA_U32 }, | |
703 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
704 | [CTA_MARK] = { .type = NLA_U32 }, | |
705 | [CTA_USE] = { .type = NLA_U32 }, | |
706 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
707 | }; |
708 | ||
709 | static int | |
601e68e1 | 710 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 711 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
712 | { |
713 | struct nf_conntrack_tuple_hash *h; | |
714 | struct nf_conntrack_tuple tuple; | |
715 | struct nf_conn *ct; | |
716 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
717 | u_int8_t u3 = nfmsg->nfgen_family; | |
718 | int err = 0; | |
719 | ||
df6fb868 | 720 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 721 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 722 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
723 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
724 | else { | |
725 | /* Flush the whole table */ | |
19abb7b0 PNA |
726 | nf_conntrack_flush(&init_net, |
727 | NETLINK_CB(skb).pid, | |
728 | nlmsg_report(nlh)); | |
c1d10adb PNA |
729 | return 0; |
730 | } | |
731 | ||
732 | if (err < 0) | |
733 | return err; | |
734 | ||
400dad39 | 735 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 736 | if (!h) |
c1d10adb | 737 | return -ENOENT; |
c1d10adb PNA |
738 | |
739 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 740 | |
df6fb868 | 741 | if (cda[CTA_ID]) { |
77236b6e | 742 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 743 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
744 | nf_ct_put(ct); |
745 | return -ENOENT; | |
746 | } | |
601e68e1 | 747 | } |
c1d10adb | 748 | |
19abb7b0 PNA |
749 | nf_conntrack_event_report(IPCT_DESTROY, |
750 | ct, | |
751 | NETLINK_CB(skb).pid, | |
752 | nlmsg_report(nlh)); | |
753 | ||
754 | /* death_by_timeout would report the event again */ | |
755 | set_bit(IPS_DYING_BIT, &ct->status); | |
756 | ||
51091764 | 757 | nf_ct_kill(ct); |
c1d10adb | 758 | nf_ct_put(ct); |
c1d10adb PNA |
759 | |
760 | return 0; | |
761 | } | |
762 | ||
763 | static int | |
601e68e1 | 764 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 765 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
766 | { |
767 | struct nf_conntrack_tuple_hash *h; | |
768 | struct nf_conntrack_tuple tuple; | |
769 | struct nf_conn *ct; | |
770 | struct sk_buff *skb2 = NULL; | |
771 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
772 | u_int8_t u3 = nfmsg->nfgen_family; | |
773 | int err = 0; | |
774 | ||
58401572 | 775 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
776 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
777 | ctnetlink_done); | |
c1d10adb | 778 | |
df6fb868 | 779 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 780 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 781 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
782 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
783 | else | |
784 | return -EINVAL; | |
785 | ||
786 | if (err < 0) | |
787 | return err; | |
788 | ||
400dad39 | 789 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 790 | if (!h) |
c1d10adb | 791 | return -ENOENT; |
9ea8cfd6 | 792 | |
c1d10adb PNA |
793 | ct = nf_ct_tuplehash_to_ctrack(h); |
794 | ||
795 | err = -ENOMEM; | |
796 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
797 | if (!skb2) { | |
798 | nf_ct_put(ct); | |
799 | return -ENOMEM; | |
800 | } | |
c1d10adb | 801 | |
528a3a6f | 802 | rcu_read_lock(); |
601e68e1 | 803 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
c1d10adb | 804 | IPCTNL_MSG_CT_NEW, 1, ct); |
528a3a6f | 805 | rcu_read_unlock(); |
c1d10adb PNA |
806 | nf_ct_put(ct); |
807 | if (err <= 0) | |
808 | goto free; | |
809 | ||
810 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
811 | if (err < 0) | |
812 | goto out; | |
813 | ||
c1d10adb PNA |
814 | return 0; |
815 | ||
816 | free: | |
817 | kfree_skb(skb2); | |
818 | out: | |
819 | return err; | |
820 | } | |
821 | ||
67671841 | 822 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
823 | static int |
824 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
825 | enum nf_nat_manip_type manip, | |
826 | struct nlattr *attr) | |
827 | { | |
828 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
829 | ||
830 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
831 | if (!parse_nat_setup) { | |
95a5afca | 832 | #ifdef CONFIG_MODULES |
e6a7d3c0 PNA |
833 | rcu_read_unlock(); |
834 | nfnl_unlock(); | |
835 | if (request_module("nf-nat-ipv4") < 0) { | |
836 | nfnl_lock(); | |
837 | rcu_read_lock(); | |
838 | return -EOPNOTSUPP; | |
839 | } | |
840 | nfnl_lock(); | |
841 | rcu_read_lock(); | |
842 | if (nfnetlink_parse_nat_setup_hook) | |
843 | return -EAGAIN; | |
844 | #endif | |
845 | return -EOPNOTSUPP; | |
846 | } | |
847 | ||
848 | return parse_nat_setup(ct, manip, attr); | |
849 | } | |
67671841 | 850 | #endif |
e6a7d3c0 | 851 | |
bb5cf80e | 852 | static int |
df6fb868 | 853 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
854 | { |
855 | unsigned long d; | |
77236b6e | 856 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
857 | d = ct->status ^ status; |
858 | ||
859 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
860 | /* unchangeable */ | |
0adf9d67 | 861 | return -EBUSY; |
601e68e1 | 862 | |
c1d10adb PNA |
863 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
864 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 865 | return -EBUSY; |
601e68e1 | 866 | |
c1d10adb PNA |
867 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
868 | /* ASSURED bit can only be set */ | |
0adf9d67 | 869 | return -EBUSY; |
c1d10adb | 870 | |
c1d10adb PNA |
871 | /* Be careful here, modifying NAT bits can screw up things, |
872 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 873 | * nf_nat_range. */ |
c1d10adb PNA |
874 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
875 | return 0; | |
876 | } | |
877 | ||
e6a7d3c0 PNA |
878 | static int |
879 | ctnetlink_change_nat(struct nf_conn *ct, struct nlattr *cda[]) | |
880 | { | |
881 | #ifdef CONFIG_NF_NAT_NEEDED | |
882 | int ret; | |
883 | ||
884 | if (cda[CTA_NAT_DST]) { | |
885 | ret = ctnetlink_parse_nat_setup(ct, | |
886 | IP_NAT_MANIP_DST, | |
887 | cda[CTA_NAT_DST]); | |
888 | if (ret < 0) | |
889 | return ret; | |
890 | } | |
891 | if (cda[CTA_NAT_SRC]) { | |
892 | ret = ctnetlink_parse_nat_setup(ct, | |
893 | IP_NAT_MANIP_SRC, | |
894 | cda[CTA_NAT_SRC]); | |
895 | if (ret < 0) | |
896 | return ret; | |
897 | } | |
898 | return 0; | |
899 | #else | |
900 | return -EOPNOTSUPP; | |
901 | #endif | |
902 | } | |
c1d10adb PNA |
903 | |
904 | static inline int | |
df6fb868 | 905 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
906 | { |
907 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 908 | struct nf_conn_help *help = nfct_help(ct); |
c1d10adb PNA |
909 | char *helpname; |
910 | int err; | |
911 | ||
c1d10adb PNA |
912 | /* don't change helper of sibling connections */ |
913 | if (ct->master) | |
0adf9d67 | 914 | return -EBUSY; |
c1d10adb | 915 | |
df6fb868 | 916 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
917 | if (err < 0) |
918 | return err; | |
919 | ||
df293bbb YK |
920 | if (!strcmp(helpname, "")) { |
921 | if (help && help->helper) { | |
c1d10adb PNA |
922 | /* we had a helper before ... */ |
923 | nf_ct_remove_expectations(ct); | |
3c158f7f | 924 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 925 | } |
df293bbb YK |
926 | |
927 | return 0; | |
c1d10adb | 928 | } |
601e68e1 | 929 | |
df293bbb | 930 | helper = __nf_conntrack_helper_find_byname(helpname); |
226c0c0e PNA |
931 | if (helper == NULL) { |
932 | #ifdef CONFIG_MODULES | |
933 | spin_unlock_bh(&nf_conntrack_lock); | |
934 | ||
935 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
936 | spin_lock_bh(&nf_conntrack_lock); | |
937 | return -EOPNOTSUPP; | |
938 | } | |
939 | ||
940 | spin_lock_bh(&nf_conntrack_lock); | |
941 | helper = __nf_conntrack_helper_find_byname(helpname); | |
942 | if (helper) | |
943 | return -EAGAIN; | |
944 | #endif | |
0adf9d67 | 945 | return -EOPNOTSUPP; |
226c0c0e | 946 | } |
df293bbb | 947 | |
ceceae1b YK |
948 | if (help) { |
949 | if (help->helper == helper) | |
950 | return 0; | |
951 | if (help->helper) | |
952 | return -EBUSY; | |
953 | /* need to zero data of old helper */ | |
954 | memset(&help->help, 0, sizeof(help->help)); | |
955 | } else { | |
fab00c5d | 956 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
ceceae1b YK |
957 | if (help == NULL) |
958 | return -ENOMEM; | |
959 | } | |
df293bbb | 960 | |
3c158f7f | 961 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
962 | |
963 | return 0; | |
964 | } | |
965 | ||
966 | static inline int | |
df6fb868 | 967 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 968 | { |
77236b6e | 969 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 970 | |
c1d10adb PNA |
971 | if (!del_timer(&ct->timeout)) |
972 | return -ETIME; | |
973 | ||
974 | ct->timeout.expires = jiffies + timeout * HZ; | |
975 | add_timer(&ct->timeout); | |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
980 | static inline int | |
df6fb868 | 981 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 982 | { |
df6fb868 | 983 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 984 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
985 | int err = 0; |
986 | ||
df6fb868 | 987 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 988 | |
5e8fbe2a | 989 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
fdf70832 PM |
990 | if (l4proto->from_nlattr) |
991 | err = l4proto->from_nlattr(tb, ct); | |
605dcad6 | 992 | nf_ct_l4proto_put(l4proto); |
c1d10adb PNA |
993 | |
994 | return err; | |
995 | } | |
996 | ||
13eae15a PNA |
997 | #ifdef CONFIG_NF_NAT_NEEDED |
998 | static inline int | |
999 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1000 | { | |
1001 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1002 | ||
1003 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1004 | ||
1005 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1006 | return -EINVAL; | |
1007 | ||
1008 | natseq->correction_pos = | |
77236b6e | 1009 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1010 | |
1011 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1012 | return -EINVAL; | |
1013 | ||
1014 | natseq->offset_before = | |
77236b6e | 1015 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1016 | |
1017 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1018 | return -EINVAL; | |
1019 | ||
1020 | natseq->offset_after = | |
77236b6e | 1021 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1022 | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static int | |
1027 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1028 | { | |
1029 | int ret = 0; | |
1030 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1031 | ||
1032 | if (!nat) | |
1033 | return 0; | |
1034 | ||
1035 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1036 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1037 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1038 | if (ret < 0) | |
1039 | return ret; | |
1040 | ||
1041 | ct->status |= IPS_SEQ_ADJUST; | |
1042 | } | |
1043 | ||
1044 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1045 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1046 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1047 | if (ret < 0) | |
1048 | return ret; | |
1049 | ||
1050 | ct->status |= IPS_SEQ_ADJUST; | |
1051 | } | |
1052 | ||
1053 | return 0; | |
1054 | } | |
1055 | #endif | |
1056 | ||
c1d10adb | 1057 | static int |
df6fb868 | 1058 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1059 | { |
1060 | int err; | |
1061 | ||
df6fb868 | 1062 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1063 | err = ctnetlink_change_helper(ct, cda); |
1064 | if (err < 0) | |
1065 | return err; | |
1066 | } | |
1067 | ||
df6fb868 | 1068 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1069 | err = ctnetlink_change_timeout(ct, cda); |
1070 | if (err < 0) | |
1071 | return err; | |
1072 | } | |
1073 | ||
df6fb868 | 1074 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1075 | err = ctnetlink_change_status(ct, cda); |
1076 | if (err < 0) | |
1077 | return err; | |
1078 | } | |
1079 | ||
df6fb868 | 1080 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1081 | err = ctnetlink_change_protoinfo(ct, cda); |
1082 | if (err < 0) | |
1083 | return err; | |
1084 | } | |
1085 | ||
bcd1e830 | 1086 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1087 | if (cda[CTA_MARK]) |
77236b6e | 1088 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1089 | #endif |
1090 | ||
13eae15a PNA |
1091 | #ifdef CONFIG_NF_NAT_NEEDED |
1092 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1093 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1094 | if (err < 0) | |
1095 | return err; | |
1096 | } | |
1097 | #endif | |
1098 | ||
c1d10adb PNA |
1099 | return 0; |
1100 | } | |
1101 | ||
19abb7b0 PNA |
1102 | static inline void |
1103 | ctnetlink_event_report(struct nf_conn *ct, u32 pid, int report) | |
1104 | { | |
1105 | unsigned int events = 0; | |
1106 | ||
1107 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) | |
1108 | events |= IPCT_RELATED; | |
1109 | else | |
1110 | events |= IPCT_NEW; | |
1111 | ||
1112 | nf_conntrack_event_report(IPCT_STATUS | | |
1113 | IPCT_HELPER | | |
1114 | IPCT_REFRESH | | |
1115 | IPCT_PROTOINFO | | |
1116 | IPCT_NATSEQADJ | | |
1117 | IPCT_MARK | | |
1118 | events, | |
1119 | ct, | |
1120 | pid, | |
1121 | report); | |
1122 | } | |
1123 | ||
c1d10adb | 1124 | static int |
df6fb868 | 1125 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1126 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1127 | struct nf_conntrack_tuple *rtuple, |
19abb7b0 PNA |
1128 | struct nf_conn *master_ct, |
1129 | u32 pid, | |
1130 | int report) | |
c1d10adb PNA |
1131 | { |
1132 | struct nf_conn *ct; | |
1133 | int err = -EINVAL; | |
ceceae1b | 1134 | struct nf_conntrack_helper *helper; |
c1d10adb | 1135 | |
b54ad409 | 1136 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); |
c1d10adb | 1137 | if (ct == NULL || IS_ERR(ct)) |
601e68e1 | 1138 | return -ENOMEM; |
c1d10adb | 1139 | |
df6fb868 | 1140 | if (!cda[CTA_TIMEOUT]) |
c1d10adb | 1141 | goto err; |
77236b6e | 1142 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1143 | |
1144 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1145 | ct->status |= IPS_CONFIRMED; | |
1146 | ||
1575e7ea | 1147 | rcu_read_lock(); |
226c0c0e PNA |
1148 | if (cda[CTA_HELP]) { |
1149 | char *helpname; | |
1150 | ||
1151 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
1152 | if (err < 0) { | |
1153 | rcu_read_unlock(); | |
1154 | goto err; | |
1155 | } | |
1156 | ||
1157 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1158 | if (helper == NULL) { | |
1159 | rcu_read_unlock(); | |
1160 | #ifdef CONFIG_MODULES | |
1161 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1162 | err = -EOPNOTSUPP; | |
1163 | goto err; | |
1164 | } | |
1165 | ||
1166 | rcu_read_lock(); | |
1167 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1168 | if (helper) { | |
1169 | rcu_read_unlock(); | |
1170 | err = -EAGAIN; | |
1171 | goto err; | |
1172 | } | |
1173 | rcu_read_unlock(); | |
1174 | #endif | |
1175 | err = -EOPNOTSUPP; | |
1176 | goto err; | |
1177 | } else { | |
1178 | struct nf_conn_help *help; | |
1179 | ||
1180 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1181 | if (help == NULL) { | |
1182 | rcu_read_unlock(); | |
1183 | err = -ENOMEM; | |
1184 | goto err; | |
1185 | } | |
1186 | ||
1187 | /* not in hash table yet so not strictly necessary */ | |
1188 | rcu_assign_pointer(help->helper, helper); | |
1189 | } | |
1190 | } else { | |
1191 | /* try an implicit helper assignation */ | |
1192 | err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); | |
1193 | if (err < 0) { | |
1575e7ea | 1194 | rcu_read_unlock(); |
1575e7ea PNA |
1195 | goto err; |
1196 | } | |
1575e7ea PNA |
1197 | } |
1198 | ||
df6fb868 | 1199 | if (cda[CTA_STATUS]) { |
bbb3357d | 1200 | err = ctnetlink_change_status(ct, cda); |
1575e7ea | 1201 | if (err < 0) { |
e6a7d3c0 PNA |
1202 | rcu_read_unlock(); |
1203 | goto err; | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { | |
1208 | err = ctnetlink_change_nat(ct, cda); | |
1209 | if (err < 0) { | |
1575e7ea | 1210 | rcu_read_unlock(); |
bbb3357d | 1211 | goto err; |
1575e7ea | 1212 | } |
bbb3357d | 1213 | } |
c1d10adb | 1214 | |
df6fb868 | 1215 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1216 | err = ctnetlink_change_protoinfo(ct, cda); |
1575e7ea PNA |
1217 | if (err < 0) { |
1218 | rcu_read_unlock(); | |
c54ea3b9 | 1219 | goto err; |
1575e7ea | 1220 | } |
c1d10adb PNA |
1221 | } |
1222 | ||
3ec19255 | 1223 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
58401572 | 1224 | |
bcd1e830 | 1225 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1226 | if (cda[CTA_MARK]) |
77236b6e | 1227 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1228 | #endif |
1229 | ||
5faa1f4c | 1230 | /* setup master conntrack: this is a confirmed expectation */ |
f2a89004 PNA |
1231 | if (master_ct) { |
1232 | __set_bit(IPS_EXPECTED_BIT, &ct->status); | |
5faa1f4c | 1233 | ct->master = master_ct; |
f2a89004 | 1234 | } |
5faa1f4c | 1235 | |
19abb7b0 | 1236 | nf_conntrack_get(&ct->ct_general); |
c1d10adb PNA |
1237 | add_timer(&ct->timeout); |
1238 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1239 | rcu_read_unlock(); |
19abb7b0 PNA |
1240 | ctnetlink_event_report(ct, pid, report); |
1241 | nf_ct_put(ct); | |
dafc741c | 1242 | |
c1d10adb PNA |
1243 | return 0; |
1244 | ||
601e68e1 | 1245 | err: |
c1d10adb PNA |
1246 | nf_conntrack_free(ct); |
1247 | return err; | |
1248 | } | |
1249 | ||
601e68e1 YH |
1250 | static int |
1251 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1252 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1253 | { |
1254 | struct nf_conntrack_tuple otuple, rtuple; | |
1255 | struct nf_conntrack_tuple_hash *h = NULL; | |
1256 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1257 | u_int8_t u3 = nfmsg->nfgen_family; | |
1258 | int err = 0; | |
1259 | ||
df6fb868 | 1260 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1261 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1262 | if (err < 0) | |
1263 | return err; | |
1264 | } | |
1265 | ||
df6fb868 | 1266 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1267 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1268 | if (err < 0) | |
1269 | return err; | |
1270 | } | |
1271 | ||
f8ba1aff | 1272 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1273 | if (cda[CTA_TUPLE_ORIG]) |
400dad39 | 1274 | h = __nf_conntrack_find(&init_net, &otuple); |
df6fb868 | 1275 | else if (cda[CTA_TUPLE_REPLY]) |
400dad39 | 1276 | h = __nf_conntrack_find(&init_net, &rtuple); |
c1d10adb PNA |
1277 | |
1278 | if (h == NULL) { | |
5faa1f4c PNA |
1279 | struct nf_conntrack_tuple master; |
1280 | struct nf_conntrack_tuple_hash *master_h = NULL; | |
1281 | struct nf_conn *master_ct = NULL; | |
1282 | ||
1283 | if (cda[CTA_TUPLE_MASTER]) { | |
1284 | err = ctnetlink_parse_tuple(cda, | |
1285 | &master, | |
1286 | CTA_TUPLE_MASTER, | |
1287 | u3); | |
1288 | if (err < 0) | |
1d670fdc | 1289 | goto out_unlock; |
5faa1f4c | 1290 | |
400dad39 | 1291 | master_h = __nf_conntrack_find(&init_net, &master); |
5faa1f4c PNA |
1292 | if (master_h == NULL) { |
1293 | err = -ENOENT; | |
1294 | goto out_unlock; | |
1295 | } | |
1296 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
238ede81 | 1297 | nf_conntrack_get(&master_ct->ct_general); |
5faa1f4c PNA |
1298 | } |
1299 | ||
c1d10adb PNA |
1300 | err = -ENOENT; |
1301 | if (nlh->nlmsg_flags & NLM_F_CREATE) | |
5faa1f4c PNA |
1302 | err = ctnetlink_create_conntrack(cda, |
1303 | &otuple, | |
1304 | &rtuple, | |
19abb7b0 PNA |
1305 | master_ct, |
1306 | NETLINK_CB(skb).pid, | |
1307 | nlmsg_report(nlh)); | |
b54ad409 | 1308 | spin_unlock_bh(&nf_conntrack_lock); |
5faa1f4c PNA |
1309 | if (err < 0 && master_ct) |
1310 | nf_ct_put(master_ct); | |
1311 | ||
c1d10adb PNA |
1312 | return err; |
1313 | } | |
1314 | /* implicit 'else' */ | |
1315 | ||
c1d10adb PNA |
1316 | /* We manipulate the conntrack inside the global conntrack table lock, |
1317 | * so there's no need to increase the refcount */ | |
c1d10adb | 1318 | err = -EEXIST; |
ff4ca827 | 1319 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1320 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1321 | ||
ff4ca827 | 1322 | /* we only allow nat config for new conntracks */ |
df6fb868 | 1323 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
0adf9d67 | 1324 | err = -EOPNOTSUPP; |
ff4ca827 PNA |
1325 | goto out_unlock; |
1326 | } | |
5faa1f4c PNA |
1327 | /* can't link an existing conntrack to a master */ |
1328 | if (cda[CTA_TUPLE_MASTER]) { | |
0adf9d67 | 1329 | err = -EOPNOTSUPP; |
5faa1f4c PNA |
1330 | goto out_unlock; |
1331 | } | |
19abb7b0 PNA |
1332 | |
1333 | err = ctnetlink_change_conntrack(ct, cda); | |
1334 | if (err == 0) { | |
1335 | nf_conntrack_get(&ct->ct_general); | |
1336 | spin_unlock_bh(&nf_conntrack_lock); | |
1337 | ctnetlink_event_report(ct, | |
1338 | NETLINK_CB(skb).pid, | |
1339 | nlmsg_report(nlh)); | |
1340 | nf_ct_put(ct); | |
1341 | } else | |
1342 | spin_unlock_bh(&nf_conntrack_lock); | |
1343 | ||
1344 | return err; | |
ff4ca827 | 1345 | } |
c1d10adb PNA |
1346 | |
1347 | out_unlock: | |
f8ba1aff | 1348 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1349 | return err; |
1350 | } | |
1351 | ||
601e68e1 YH |
1352 | /*********************************************************************** |
1353 | * EXPECT | |
1354 | ***********************************************************************/ | |
c1d10adb PNA |
1355 | |
1356 | static inline int | |
1357 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1358 | const struct nf_conntrack_tuple *tuple, | |
1359 | enum ctattr_expect type) | |
1360 | { | |
df6fb868 | 1361 | struct nlattr *nest_parms; |
601e68e1 | 1362 | |
df6fb868 PM |
1363 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1364 | if (!nest_parms) | |
1365 | goto nla_put_failure; | |
c1d10adb | 1366 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1367 | goto nla_put_failure; |
1368 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1369 | |
1370 | return 0; | |
1371 | ||
df6fb868 | 1372 | nla_put_failure: |
c1d10adb | 1373 | return -1; |
601e68e1 | 1374 | } |
c1d10adb | 1375 | |
1cde6436 PNA |
1376 | static inline int |
1377 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1378 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1379 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1380 | { |
1381 | int ret; | |
1382 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1383 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1384 | struct nf_conntrack_tuple m; |
df6fb868 | 1385 | struct nlattr *nest_parms; |
d4156e8c PM |
1386 | |
1387 | memset(&m, 0xFF, sizeof(m)); | |
1388 | m.src.u.all = mask->src.u.all; | |
1389 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1390 | ||
df6fb868 PM |
1391 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1392 | if (!nest_parms) | |
1393 | goto nla_put_failure; | |
1cde6436 | 1394 | |
528a3a6f | 1395 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1396 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1397 | |
1398 | if (unlikely(ret < 0)) | |
df6fb868 | 1399 | goto nla_put_failure; |
1cde6436 | 1400 | |
528a3a6f | 1401 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1402 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1403 | if (unlikely(ret < 0)) |
df6fb868 | 1404 | goto nla_put_failure; |
1cde6436 | 1405 | |
df6fb868 | 1406 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1407 | |
1408 | return 0; | |
1409 | ||
df6fb868 | 1410 | nla_put_failure: |
1cde6436 PNA |
1411 | return -1; |
1412 | } | |
1413 | ||
bb5cf80e | 1414 | static int |
c1d10adb | 1415 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1416 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1417 | { |
1418 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1419 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1420 | ||
1421 | if (timeout < 0) | |
1422 | timeout = 0; | |
c1d10adb PNA |
1423 | |
1424 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1425 | goto nla_put_failure; |
1cde6436 | 1426 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1427 | goto nla_put_failure; |
c1d10adb PNA |
1428 | if (ctnetlink_exp_dump_tuple(skb, |
1429 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1430 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1431 | goto nla_put_failure; |
601e68e1 | 1432 | |
d978e5da | 1433 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1434 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1435 | |
1436 | return 0; | |
601e68e1 | 1437 | |
df6fb868 | 1438 | nla_put_failure: |
c1d10adb PNA |
1439 | return -1; |
1440 | } | |
1441 | ||
1442 | static int | |
1443 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 YH |
1444 | int event, |
1445 | int nowait, | |
c1d10adb PNA |
1446 | const struct nf_conntrack_expect *exp) |
1447 | { | |
1448 | struct nlmsghdr *nlh; | |
1449 | struct nfgenmsg *nfmsg; | |
27a884dc | 1450 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1451 | |
1452 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1453 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1454 | nfmsg = NLMSG_DATA(nlh); | |
1455 | ||
1456 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
1457 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1458 | nfmsg->version = NFNETLINK_V0; | |
1459 | nfmsg->res_id = 0; | |
1460 | ||
1461 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1462 | goto nla_put_failure; |
c1d10adb | 1463 | |
27a884dc | 1464 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1465 | return skb->len; |
1466 | ||
1467 | nlmsg_failure: | |
df6fb868 | 1468 | nla_put_failure: |
dc5fc579 | 1469 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1470 | return -1; |
1471 | } | |
1472 | ||
1473 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1474 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1475 | unsigned long events, void *ptr) | |
1476 | { | |
1477 | struct nlmsghdr *nlh; | |
1478 | struct nfgenmsg *nfmsg; | |
19abb7b0 PNA |
1479 | struct nf_exp_event *item = (struct nf_exp_event *)ptr; |
1480 | struct nf_conntrack_expect *exp = item->exp; | |
c1d10adb PNA |
1481 | struct sk_buff *skb; |
1482 | unsigned int type; | |
27a884dc | 1483 | sk_buff_data_t b; |
c1d10adb PNA |
1484 | int flags = 0; |
1485 | ||
1486 | if (events & IPEXP_NEW) { | |
1487 | type = IPCTNL_MSG_EXP_NEW; | |
1488 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1489 | } else | |
1490 | return NOTIFY_DONE; | |
1491 | ||
b3a27bfb PNA |
1492 | if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) |
1493 | return NOTIFY_DONE; | |
1494 | ||
c1d10adb PNA |
1495 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1496 | if (!skb) | |
1497 | return NOTIFY_DONE; | |
1498 | ||
1499 | b = skb->tail; | |
1500 | ||
b633ad5f | 1501 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
19abb7b0 | 1502 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
1503 | nfmsg = NLMSG_DATA(nlh); |
1504 | ||
1505 | nlh->nlmsg_flags = flags; | |
1506 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1507 | nfmsg->version = NFNETLINK_V0; | |
1508 | nfmsg->res_id = 0; | |
1509 | ||
528a3a6f | 1510 | rcu_read_lock(); |
c1d10adb | 1511 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1512 | goto nla_put_failure; |
528a3a6f | 1513 | rcu_read_unlock(); |
c1d10adb PNA |
1514 | |
1515 | nlh->nlmsg_len = skb->tail - b; | |
19abb7b0 | 1516 | nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report); |
c1d10adb PNA |
1517 | return NOTIFY_DONE; |
1518 | ||
df6fb868 | 1519 | nla_put_failure: |
528a3a6f PNA |
1520 | rcu_read_unlock(); |
1521 | nlmsg_failure: | |
c1d10adb PNA |
1522 | kfree_skb(skb); |
1523 | return NOTIFY_DONE; | |
1524 | } | |
1525 | #endif | |
cf6994c2 PM |
1526 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1527 | { | |
31f15875 PM |
1528 | if (cb->args[1]) |
1529 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1530 | return 0; |
1531 | } | |
c1d10adb PNA |
1532 | |
1533 | static int | |
1534 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1535 | { | |
9b03f38d | 1536 | struct net *net = &init_net; |
cf6994c2 | 1537 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1538 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1539 | struct hlist_node *n; |
87711cb8 | 1540 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1541 | |
7d0742da | 1542 | rcu_read_lock(); |
31f15875 PM |
1543 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1544 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1545 | restart: |
9b03f38d | 1546 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1547 | hnode) { |
1548 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1549 | continue; |
31f15875 PM |
1550 | if (cb->args[1]) { |
1551 | if (exp != last) | |
1552 | continue; | |
1553 | cb->args[1] = 0; | |
1554 | } | |
1555 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, | |
1556 | cb->nlh->nlmsg_seq, | |
1557 | IPCTNL_MSG_EXP_NEW, | |
1558 | 1, exp) < 0) { | |
7d0742da PM |
1559 | if (!atomic_inc_not_zero(&exp->use)) |
1560 | continue; | |
31f15875 PM |
1561 | cb->args[1] = (unsigned long)exp; |
1562 | goto out; | |
1563 | } | |
cf6994c2 | 1564 | } |
31f15875 PM |
1565 | if (cb->args[1]) { |
1566 | cb->args[1] = 0; | |
1567 | goto restart; | |
cf6994c2 PM |
1568 | } |
1569 | } | |
601e68e1 | 1570 | out: |
7d0742da | 1571 | rcu_read_unlock(); |
cf6994c2 PM |
1572 | if (last) |
1573 | nf_ct_expect_put(last); | |
c1d10adb | 1574 | |
c1d10adb PNA |
1575 | return skb->len; |
1576 | } | |
1577 | ||
f73e924c PM |
1578 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1579 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1580 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1581 | }; |
1582 | ||
1583 | static int | |
601e68e1 | 1584 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1585 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1586 | { |
1587 | struct nf_conntrack_tuple tuple; | |
1588 | struct nf_conntrack_expect *exp; | |
1589 | struct sk_buff *skb2; | |
1590 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1591 | u_int8_t u3 = nfmsg->nfgen_family; | |
1592 | int err = 0; | |
1593 | ||
c1d10adb | 1594 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1595 | return netlink_dump_start(ctnl, skb, nlh, |
1596 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1597 | ctnetlink_exp_done); |
c1d10adb PNA |
1598 | } |
1599 | ||
df6fb868 | 1600 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1601 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1602 | else | |
1603 | return -EINVAL; | |
1604 | ||
1605 | if (err < 0) | |
1606 | return err; | |
1607 | ||
9b03f38d | 1608 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1609 | if (!exp) |
1610 | return -ENOENT; | |
1611 | ||
df6fb868 | 1612 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1613 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1614 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1615 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1616 | return -ENOENT; |
1617 | } | |
601e68e1 | 1618 | } |
c1d10adb PNA |
1619 | |
1620 | err = -ENOMEM; | |
1621 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1622 | if (!skb2) | |
1623 | goto out; | |
4e9b8269 | 1624 | |
528a3a6f | 1625 | rcu_read_lock(); |
601e68e1 | 1626 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
c1d10adb PNA |
1627 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
1628 | 1, exp); | |
528a3a6f | 1629 | rcu_read_unlock(); |
c1d10adb PNA |
1630 | if (err <= 0) |
1631 | goto free; | |
1632 | ||
6823645d | 1633 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1634 | |
1635 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1636 | ||
1637 | free: | |
1638 | kfree_skb(skb2); | |
1639 | out: | |
6823645d | 1640 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1641 | return err; |
1642 | } | |
1643 | ||
1644 | static int | |
601e68e1 | 1645 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1646 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1647 | { |
31f15875 | 1648 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1649 | struct nf_conntrack_tuple tuple; |
1650 | struct nf_conntrack_helper *h; | |
1651 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1652 | struct hlist_node *n, *next; |
c1d10adb | 1653 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1654 | unsigned int i; |
c1d10adb PNA |
1655 | int err; |
1656 | ||
df6fb868 | 1657 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1658 | /* delete a single expect by tuple */ |
1659 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1660 | if (err < 0) | |
1661 | return err; | |
1662 | ||
1663 | /* bump usage count to 2 */ | |
9b03f38d | 1664 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1665 | if (!exp) |
1666 | return -ENOENT; | |
1667 | ||
df6fb868 | 1668 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1669 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1670 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1671 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1672 | return -ENOENT; |
1673 | } | |
1674 | } | |
1675 | ||
1676 | /* after list removal, usage count == 1 */ | |
6823645d | 1677 | nf_ct_unexpect_related(exp); |
601e68e1 | 1678 | /* have to put what we 'get' above. |
c1d10adb | 1679 | * after this line usage count == 0 */ |
6823645d | 1680 | nf_ct_expect_put(exp); |
df6fb868 PM |
1681 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1682 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1683 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1684 | |
1685 | /* delete all expectations for this helper */ | |
f8ba1aff | 1686 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1687 | h = __nf_conntrack_helper_find_byname(name); |
1688 | if (!h) { | |
f8ba1aff | 1689 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1690 | return -EOPNOTSUPP; |
c1d10adb | 1691 | } |
31f15875 PM |
1692 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1693 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1694 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1695 | hnode) { |
1696 | m_help = nfct_help(exp->master); | |
1697 | if (m_help->helper == h | |
1698 | && del_timer(&exp->timeout)) { | |
1699 | nf_ct_unlink_expect(exp); | |
1700 | nf_ct_expect_put(exp); | |
1701 | } | |
c1d10adb PNA |
1702 | } |
1703 | } | |
f8ba1aff | 1704 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1705 | } else { |
1706 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1707 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1708 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1709 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1710 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1711 | hnode) { |
1712 | if (del_timer(&exp->timeout)) { | |
1713 | nf_ct_unlink_expect(exp); | |
1714 | nf_ct_expect_put(exp); | |
1715 | } | |
c1d10adb PNA |
1716 | } |
1717 | } | |
f8ba1aff | 1718 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1719 | } |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | static int | |
df6fb868 | 1724 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1725 | { |
1726 | return -EOPNOTSUPP; | |
1727 | } | |
1728 | ||
1729 | static int | |
19abb7b0 | 1730 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) |
c1d10adb PNA |
1731 | { |
1732 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1733 | struct nf_conntrack_tuple_hash *h = NULL; | |
1734 | struct nf_conntrack_expect *exp; | |
1735 | struct nf_conn *ct; | |
dc808fe2 | 1736 | struct nf_conn_help *help; |
c1d10adb PNA |
1737 | int err = 0; |
1738 | ||
c1d10adb PNA |
1739 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1740 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1741 | if (err < 0) | |
1742 | return err; | |
1743 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1744 | if (err < 0) | |
1745 | return err; | |
1746 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1747 | if (err < 0) | |
1748 | return err; | |
1749 | ||
1750 | /* Look for master conntrack of this expectation */ | |
400dad39 | 1751 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
c1d10adb PNA |
1752 | if (!h) |
1753 | return -ENOENT; | |
1754 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1755 | help = nfct_help(ct); |
c1d10adb | 1756 | |
dc808fe2 | 1757 | if (!help || !help->helper) { |
c1d10adb | 1758 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1759 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1760 | goto out; |
1761 | } | |
1762 | ||
6823645d | 1763 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1764 | if (!exp) { |
1765 | err = -ENOMEM; | |
1766 | goto out; | |
1767 | } | |
601e68e1 | 1768 | |
c1d10adb PNA |
1769 | exp->expectfn = NULL; |
1770 | exp->flags = 0; | |
1771 | exp->master = ct; | |
9457d851 | 1772 | exp->helper = NULL; |
c1d10adb | 1773 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1774 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1775 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1776 | |
19abb7b0 | 1777 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1778 | nf_ct_expect_put(exp); |
c1d10adb | 1779 | |
601e68e1 | 1780 | out: |
c1d10adb PNA |
1781 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1782 | return err; | |
1783 | } | |
1784 | ||
1785 | static int | |
1786 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1787 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1788 | { |
1789 | struct nf_conntrack_tuple tuple; | |
1790 | struct nf_conntrack_expect *exp; | |
1791 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1792 | u_int8_t u3 = nfmsg->nfgen_family; | |
1793 | int err = 0; | |
1794 | ||
df6fb868 PM |
1795 | if (!cda[CTA_EXPECT_TUPLE] |
1796 | || !cda[CTA_EXPECT_MASK] | |
1797 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1798 | return -EINVAL; |
1799 | ||
1800 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1801 | if (err < 0) | |
1802 | return err; | |
1803 | ||
f8ba1aff | 1804 | spin_lock_bh(&nf_conntrack_lock); |
9b03f38d | 1805 | exp = __nf_ct_expect_find(&init_net, &tuple); |
c1d10adb PNA |
1806 | |
1807 | if (!exp) { | |
f8ba1aff | 1808 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1809 | err = -ENOENT; |
19abb7b0 PNA |
1810 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1811 | err = ctnetlink_create_expect(cda, | |
1812 | u3, | |
1813 | NETLINK_CB(skb).pid, | |
1814 | nlmsg_report(nlh)); | |
1815 | } | |
c1d10adb PNA |
1816 | return err; |
1817 | } | |
1818 | ||
1819 | err = -EEXIST; | |
1820 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1821 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1822 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1823 | |
c1d10adb PNA |
1824 | return err; |
1825 | } | |
1826 | ||
1827 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1828 | static struct notifier_block ctnl_notifier = { | |
1829 | .notifier_call = ctnetlink_conntrack_event, | |
1830 | }; | |
1831 | ||
1832 | static struct notifier_block ctnl_notifier_exp = { | |
1833 | .notifier_call = ctnetlink_expect_event, | |
1834 | }; | |
1835 | #endif | |
1836 | ||
7c8d4cb4 | 1837 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1838 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1839 | .attr_count = CTA_MAX, |
1840 | .policy = ct_nla_policy }, | |
c1d10adb | 1841 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1842 | .attr_count = CTA_MAX, |
1843 | .policy = ct_nla_policy }, | |
c1d10adb | 1844 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1845 | .attr_count = CTA_MAX, |
1846 | .policy = ct_nla_policy }, | |
c1d10adb | 1847 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1848 | .attr_count = CTA_MAX, |
1849 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1850 | }; |
1851 | ||
7c8d4cb4 | 1852 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1853 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1854 | .attr_count = CTA_EXPECT_MAX, |
1855 | .policy = exp_nla_policy }, | |
c1d10adb | 1856 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1857 | .attr_count = CTA_EXPECT_MAX, |
1858 | .policy = exp_nla_policy }, | |
c1d10adb | 1859 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1860 | .attr_count = CTA_EXPECT_MAX, |
1861 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1862 | }; |
1863 | ||
7c8d4cb4 | 1864 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1865 | .name = "conntrack", |
1866 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1867 | .cb_count = IPCTNL_MSG_MAX, | |
1868 | .cb = ctnl_cb, | |
1869 | }; | |
1870 | ||
7c8d4cb4 | 1871 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1872 | .name = "conntrack_expect", |
1873 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1874 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1875 | .cb = ctnl_exp_cb, | |
1876 | }; | |
1877 | ||
d2483dde | 1878 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1879 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1880 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1881 | |
1882 | static int __init ctnetlink_init(void) | |
1883 | { | |
1884 | int ret; | |
1885 | ||
1886 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1887 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1888 | if (ret < 0) { | |
1889 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1890 | goto err_out; | |
1891 | } | |
1892 | ||
1893 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1894 | if (ret < 0) { | |
1895 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1896 | goto err_unreg_subsys; | |
1897 | } | |
1898 | ||
1899 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1900 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1901 | if (ret < 0) { | |
1902 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1903 | goto err_unreg_exp_subsys; | |
1904 | } | |
1905 | ||
6823645d | 1906 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1907 | if (ret < 0) { |
1908 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1909 | goto err_unreg_notifier; | |
1910 | } | |
1911 | #endif | |
1912 | ||
1913 | return 0; | |
1914 | ||
1915 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1916 | err_unreg_notifier: | |
1917 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1918 | err_unreg_exp_subsys: | |
1919 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1920 | #endif | |
1921 | err_unreg_subsys: | |
1922 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1923 | err_out: | |
1924 | return ret; | |
1925 | } | |
1926 | ||
1927 | static void __exit ctnetlink_exit(void) | |
1928 | { | |
1929 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1930 | ||
1931 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1932 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1933 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1934 | #endif | |
1935 | ||
1936 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1937 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1938 | return; | |
1939 | } | |
1940 | ||
1941 | module_init(ctnetlink_init); | |
1942 | module_exit(ctnetlink_exit); |