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Commit | Line | Data |
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c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
0adf9d67 | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
c1d10adb PNA |
22 | #include <linux/types.h> |
23 | #include <linux/timer.h> | |
24 | #include <linux/skbuff.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/netlink.h> | |
27 | #include <linux/spinlock.h> | |
40a839fd | 28 | #include <linux/interrupt.h> |
c1d10adb PNA |
29 | #include <linux/notifier.h> |
30 | ||
31 | #include <linux/netfilter.h> | |
dc5fc579 | 32 | #include <net/netlink.h> |
c1d10adb PNA |
33 | #include <net/netfilter/nf_conntrack.h> |
34 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 35 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
36 | #include <net/netfilter/nf_conntrack_helper.h> |
37 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 38 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 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 | 436 | |
1f9da256 | 437 | if (!item->report && !nfnetlink_has_listeners(group)) |
a2427692 PM |
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: | |
dd5b6ce6 | 521 | nfnetlink_set_err(0, group, -ENOBUFS); |
c1d10adb PNA |
522 | kfree_skb(skb); |
523 | return NOTIFY_DONE; | |
524 | } | |
525 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
526 | ||
527 | static int ctnetlink_done(struct netlink_callback *cb) | |
528 | { | |
89f2e218 PM |
529 | if (cb->args[1]) |
530 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
531 | return 0; |
532 | } | |
533 | ||
534 | static int | |
535 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
536 | { | |
89f2e218 | 537 | struct nf_conn *ct, *last; |
c1d10adb | 538 | struct nf_conntrack_tuple_hash *h; |
f205c5e0 | 539 | struct hlist_node *n; |
87711cb8 PNA |
540 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
541 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 542 | |
76507f69 | 543 | rcu_read_lock(); |
d205dc40 | 544 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
545 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
546 | restart: | |
400dad39 | 547 | hlist_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
76507f69 | 548 | hnode) { |
5b1158e9 | 549 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
550 | continue; |
551 | ct = nf_ct_tuplehash_to_ctrack(h); | |
87711cb8 PNA |
552 | /* Dump entries of a given L3 protocol number. |
553 | * If it is not specified, ie. l3proto == 0, | |
554 | * then dump everything. */ | |
5e8fbe2a | 555 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
87711cb8 | 556 | continue; |
d205dc40 PM |
557 | if (cb->args[1]) { |
558 | if (ct != last) | |
89f2e218 | 559 | continue; |
d205dc40 | 560 | cb->args[1] = 0; |
89f2e218 | 561 | } |
c1d10adb | 562 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 563 | cb->nlh->nlmsg_seq, |
c1d10adb | 564 | IPCTNL_MSG_CT_NEW, |
89f2e218 | 565 | 1, ct) < 0) { |
76507f69 PM |
566 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
567 | continue; | |
89f2e218 | 568 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 569 | goto out; |
89f2e218 | 570 | } |
58401572 | 571 | |
01f34848 | 572 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
573 | IPCTNL_MSG_CT_GET_CTRZERO) { |
574 | struct nf_conn_counter *acct; | |
575 | ||
576 | acct = nf_conn_acct_find(ct); | |
577 | if (acct) | |
578 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
579 | } | |
89f2e218 | 580 | } |
d205dc40 | 581 | if (cb->args[1]) { |
89f2e218 PM |
582 | cb->args[1] = 0; |
583 | goto restart; | |
c1d10adb PNA |
584 | } |
585 | } | |
89f2e218 | 586 | out: |
76507f69 | 587 | rcu_read_unlock(); |
d205dc40 PM |
588 | if (last) |
589 | nf_ct_put(last); | |
c1d10adb | 590 | |
c1d10adb PNA |
591 | return skb->len; |
592 | } | |
593 | ||
c1d10adb | 594 | static inline int |
df6fb868 | 595 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 596 | { |
df6fb868 | 597 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
598 | struct nf_conntrack_l3proto *l3proto; |
599 | int ret = 0; | |
600 | ||
df6fb868 | 601 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 602 | |
cd91566e FW |
603 | rcu_read_lock(); |
604 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 605 | |
f73e924c PM |
606 | if (likely(l3proto->nlattr_to_tuple)) { |
607 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
608 | l3proto->nla_policy); | |
609 | if (ret == 0) | |
610 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
611 | } | |
c1d10adb | 612 | |
cd91566e | 613 | rcu_read_unlock(); |
c1d10adb | 614 | |
c1d10adb PNA |
615 | return ret; |
616 | } | |
617 | ||
f73e924c PM |
618 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
619 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
620 | }; |
621 | ||
622 | static inline int | |
df6fb868 | 623 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
624 | struct nf_conntrack_tuple *tuple) |
625 | { | |
df6fb868 | 626 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 627 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
628 | int ret = 0; |
629 | ||
f73e924c PM |
630 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
631 | if (ret < 0) | |
632 | return ret; | |
c1d10adb | 633 | |
df6fb868 | 634 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 635 | return -EINVAL; |
77236b6e | 636 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 637 | |
cd91566e FW |
638 | rcu_read_lock(); |
639 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 640 | |
f73e924c PM |
641 | if (likely(l4proto->nlattr_to_tuple)) { |
642 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
643 | l4proto->nla_policy); | |
644 | if (ret == 0) | |
645 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
646 | } | |
c1d10adb | 647 | |
cd91566e | 648 | rcu_read_unlock(); |
601e68e1 | 649 | |
c1d10adb PNA |
650 | return ret; |
651 | } | |
652 | ||
bb5cf80e | 653 | static int |
df6fb868 | 654 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
655 | enum ctattr_tuple type, u_int8_t l3num) |
656 | { | |
df6fb868 | 657 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
658 | int err; |
659 | ||
c1d10adb PNA |
660 | memset(tuple, 0, sizeof(*tuple)); |
661 | ||
df6fb868 | 662 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 663 | |
df6fb868 | 664 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
665 | return -EINVAL; |
666 | ||
667 | tuple->src.l3num = l3num; | |
668 | ||
df6fb868 | 669 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
670 | if (err < 0) |
671 | return err; | |
672 | ||
df6fb868 | 673 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
674 | return -EINVAL; |
675 | ||
df6fb868 | 676 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
677 | if (err < 0) |
678 | return err; | |
679 | ||
680 | /* orig and expect tuples get DIR_ORIGINAL */ | |
681 | if (type == CTA_TUPLE_REPLY) | |
682 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
683 | else | |
684 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
685 | ||
c1d10adb PNA |
686 | return 0; |
687 | } | |
688 | ||
c1d10adb | 689 | static inline int |
df6fb868 | 690 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 691 | { |
df6fb868 | 692 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 693 | |
df6fb868 | 694 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 695 | |
df6fb868 | 696 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
697 | return -EINVAL; |
698 | ||
df6fb868 | 699 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
700 | |
701 | return 0; | |
702 | } | |
703 | ||
f73e924c PM |
704 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
705 | [CTA_STATUS] = { .type = NLA_U32 }, | |
706 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
707 | [CTA_MARK] = { .type = NLA_U32 }, | |
708 | [CTA_USE] = { .type = NLA_U32 }, | |
709 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
710 | }; |
711 | ||
712 | static int | |
601e68e1 | 713 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 714 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
715 | { |
716 | struct nf_conntrack_tuple_hash *h; | |
717 | struct nf_conntrack_tuple tuple; | |
718 | struct nf_conn *ct; | |
719 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
720 | u_int8_t u3 = nfmsg->nfgen_family; | |
721 | int err = 0; | |
722 | ||
df6fb868 | 723 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 724 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 725 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
726 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
727 | else { | |
728 | /* Flush the whole table */ | |
19abb7b0 PNA |
729 | nf_conntrack_flush(&init_net, |
730 | NETLINK_CB(skb).pid, | |
731 | nlmsg_report(nlh)); | |
c1d10adb PNA |
732 | return 0; |
733 | } | |
734 | ||
735 | if (err < 0) | |
736 | return err; | |
737 | ||
400dad39 | 738 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 739 | if (!h) |
c1d10adb | 740 | return -ENOENT; |
c1d10adb PNA |
741 | |
742 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 743 | |
df6fb868 | 744 | if (cda[CTA_ID]) { |
77236b6e | 745 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 746 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
747 | nf_ct_put(ct); |
748 | return -ENOENT; | |
749 | } | |
601e68e1 | 750 | } |
c1d10adb | 751 | |
19abb7b0 PNA |
752 | nf_conntrack_event_report(IPCT_DESTROY, |
753 | ct, | |
754 | NETLINK_CB(skb).pid, | |
755 | nlmsg_report(nlh)); | |
756 | ||
757 | /* death_by_timeout would report the event again */ | |
758 | set_bit(IPS_DYING_BIT, &ct->status); | |
759 | ||
51091764 | 760 | nf_ct_kill(ct); |
c1d10adb | 761 | nf_ct_put(ct); |
c1d10adb PNA |
762 | |
763 | return 0; | |
764 | } | |
765 | ||
766 | static int | |
601e68e1 | 767 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 768 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
769 | { |
770 | struct nf_conntrack_tuple_hash *h; | |
771 | struct nf_conntrack_tuple tuple; | |
772 | struct nf_conn *ct; | |
773 | struct sk_buff *skb2 = NULL; | |
774 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
775 | u_int8_t u3 = nfmsg->nfgen_family; | |
776 | int err = 0; | |
777 | ||
58401572 | 778 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
779 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
780 | ctnetlink_done); | |
c1d10adb | 781 | |
df6fb868 | 782 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 783 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 784 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
785 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
786 | else | |
787 | return -EINVAL; | |
788 | ||
789 | if (err < 0) | |
790 | return err; | |
791 | ||
400dad39 | 792 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 793 | if (!h) |
c1d10adb | 794 | return -ENOENT; |
9ea8cfd6 | 795 | |
c1d10adb PNA |
796 | ct = nf_ct_tuplehash_to_ctrack(h); |
797 | ||
798 | err = -ENOMEM; | |
799 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
800 | if (!skb2) { | |
801 | nf_ct_put(ct); | |
802 | return -ENOMEM; | |
803 | } | |
c1d10adb | 804 | |
528a3a6f | 805 | rcu_read_lock(); |
601e68e1 | 806 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
c1d10adb | 807 | IPCTNL_MSG_CT_NEW, 1, ct); |
528a3a6f | 808 | rcu_read_unlock(); |
c1d10adb PNA |
809 | nf_ct_put(ct); |
810 | if (err <= 0) | |
811 | goto free; | |
812 | ||
813 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
814 | if (err < 0) | |
815 | goto out; | |
816 | ||
c1d10adb PNA |
817 | return 0; |
818 | ||
819 | free: | |
820 | kfree_skb(skb2); | |
821 | out: | |
822 | return err; | |
823 | } | |
824 | ||
67671841 | 825 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
826 | static int |
827 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
828 | enum nf_nat_manip_type manip, | |
829 | struct nlattr *attr) | |
830 | { | |
831 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
832 | ||
833 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
834 | if (!parse_nat_setup) { | |
95a5afca | 835 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 836 | rcu_read_unlock(); |
748085fc | 837 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
838 | nfnl_unlock(); |
839 | if (request_module("nf-nat-ipv4") < 0) { | |
840 | nfnl_lock(); | |
748085fc | 841 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
842 | rcu_read_lock(); |
843 | return -EOPNOTSUPP; | |
844 | } | |
845 | nfnl_lock(); | |
748085fc | 846 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
847 | rcu_read_lock(); |
848 | if (nfnetlink_parse_nat_setup_hook) | |
849 | return -EAGAIN; | |
850 | #endif | |
851 | return -EOPNOTSUPP; | |
852 | } | |
853 | ||
854 | return parse_nat_setup(ct, manip, attr); | |
855 | } | |
67671841 | 856 | #endif |
e6a7d3c0 | 857 | |
bb5cf80e | 858 | static int |
df6fb868 | 859 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
860 | { |
861 | unsigned long d; | |
77236b6e | 862 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
863 | d = ct->status ^ status; |
864 | ||
865 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
866 | /* unchangeable */ | |
0adf9d67 | 867 | return -EBUSY; |
601e68e1 | 868 | |
c1d10adb PNA |
869 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
870 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 871 | return -EBUSY; |
601e68e1 | 872 | |
c1d10adb PNA |
873 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
874 | /* ASSURED bit can only be set */ | |
0adf9d67 | 875 | return -EBUSY; |
c1d10adb | 876 | |
c1d10adb PNA |
877 | /* Be careful here, modifying NAT bits can screw up things, |
878 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 879 | * nf_nat_range. */ |
c1d10adb PNA |
880 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
881 | return 0; | |
882 | } | |
883 | ||
e6a7d3c0 PNA |
884 | static int |
885 | ctnetlink_change_nat(struct nf_conn *ct, struct nlattr *cda[]) | |
886 | { | |
887 | #ifdef CONFIG_NF_NAT_NEEDED | |
888 | int ret; | |
889 | ||
890 | if (cda[CTA_NAT_DST]) { | |
891 | ret = ctnetlink_parse_nat_setup(ct, | |
892 | IP_NAT_MANIP_DST, | |
893 | cda[CTA_NAT_DST]); | |
894 | if (ret < 0) | |
895 | return ret; | |
896 | } | |
897 | if (cda[CTA_NAT_SRC]) { | |
898 | ret = ctnetlink_parse_nat_setup(ct, | |
899 | IP_NAT_MANIP_SRC, | |
900 | cda[CTA_NAT_SRC]); | |
901 | if (ret < 0) | |
902 | return ret; | |
903 | } | |
904 | return 0; | |
905 | #else | |
906 | return -EOPNOTSUPP; | |
907 | #endif | |
908 | } | |
c1d10adb PNA |
909 | |
910 | static inline int | |
df6fb868 | 911 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
912 | { |
913 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 914 | struct nf_conn_help *help = nfct_help(ct); |
c1d10adb PNA |
915 | char *helpname; |
916 | int err; | |
917 | ||
c1d10adb PNA |
918 | /* don't change helper of sibling connections */ |
919 | if (ct->master) | |
0adf9d67 | 920 | return -EBUSY; |
c1d10adb | 921 | |
df6fb868 | 922 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
923 | if (err < 0) |
924 | return err; | |
925 | ||
df293bbb YK |
926 | if (!strcmp(helpname, "")) { |
927 | if (help && help->helper) { | |
c1d10adb PNA |
928 | /* we had a helper before ... */ |
929 | nf_ct_remove_expectations(ct); | |
3c158f7f | 930 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 931 | } |
df293bbb YK |
932 | |
933 | return 0; | |
c1d10adb | 934 | } |
601e68e1 | 935 | |
df293bbb | 936 | helper = __nf_conntrack_helper_find_byname(helpname); |
226c0c0e PNA |
937 | if (helper == NULL) { |
938 | #ifdef CONFIG_MODULES | |
939 | spin_unlock_bh(&nf_conntrack_lock); | |
940 | ||
941 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
942 | spin_lock_bh(&nf_conntrack_lock); | |
943 | return -EOPNOTSUPP; | |
944 | } | |
945 | ||
946 | spin_lock_bh(&nf_conntrack_lock); | |
947 | helper = __nf_conntrack_helper_find_byname(helpname); | |
948 | if (helper) | |
949 | return -EAGAIN; | |
950 | #endif | |
0adf9d67 | 951 | return -EOPNOTSUPP; |
226c0c0e | 952 | } |
df293bbb | 953 | |
ceceae1b YK |
954 | if (help) { |
955 | if (help->helper == helper) | |
956 | return 0; | |
957 | if (help->helper) | |
958 | return -EBUSY; | |
959 | /* need to zero data of old helper */ | |
960 | memset(&help->help, 0, sizeof(help->help)); | |
961 | } else { | |
fab00c5d | 962 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
ceceae1b YK |
963 | if (help == NULL) |
964 | return -ENOMEM; | |
965 | } | |
df293bbb | 966 | |
3c158f7f | 967 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
968 | |
969 | return 0; | |
970 | } | |
971 | ||
972 | static inline int | |
df6fb868 | 973 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 974 | { |
77236b6e | 975 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 976 | |
c1d10adb PNA |
977 | if (!del_timer(&ct->timeout)) |
978 | return -ETIME; | |
979 | ||
980 | ct->timeout.expires = jiffies + timeout * HZ; | |
981 | add_timer(&ct->timeout); | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
986 | static inline int | |
df6fb868 | 987 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 988 | { |
df6fb868 | 989 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 990 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
991 | int err = 0; |
992 | ||
df6fb868 | 993 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 994 | |
cd91566e FW |
995 | rcu_read_lock(); |
996 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
997 | if (l4proto->from_nlattr) |
998 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 999 | rcu_read_unlock(); |
c1d10adb PNA |
1000 | |
1001 | return err; | |
1002 | } | |
1003 | ||
13eae15a PNA |
1004 | #ifdef CONFIG_NF_NAT_NEEDED |
1005 | static inline int | |
1006 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1007 | { | |
1008 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1009 | ||
1010 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1011 | ||
1012 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1013 | return -EINVAL; | |
1014 | ||
1015 | natseq->correction_pos = | |
77236b6e | 1016 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1017 | |
1018 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1019 | return -EINVAL; | |
1020 | ||
1021 | natseq->offset_before = | |
77236b6e | 1022 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1023 | |
1024 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | natseq->offset_after = | |
77236b6e | 1028 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1029 | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static int | |
1034 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1035 | { | |
1036 | int ret = 0; | |
1037 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1038 | ||
1039 | if (!nat) | |
1040 | return 0; | |
1041 | ||
1042 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1043 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1044 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1045 | if (ret < 0) | |
1046 | return ret; | |
1047 | ||
1048 | ct->status |= IPS_SEQ_ADJUST; | |
1049 | } | |
1050 | ||
1051 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1052 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1053 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1054 | if (ret < 0) | |
1055 | return ret; | |
1056 | ||
1057 | ct->status |= IPS_SEQ_ADJUST; | |
1058 | } | |
1059 | ||
1060 | return 0; | |
1061 | } | |
1062 | #endif | |
1063 | ||
c1d10adb | 1064 | static int |
df6fb868 | 1065 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1066 | { |
1067 | int err; | |
1068 | ||
e098360f PNA |
1069 | /* only allow NAT changes and master assignation for new conntracks */ |
1070 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1071 | return -EOPNOTSUPP; | |
1072 | ||
df6fb868 | 1073 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1074 | err = ctnetlink_change_helper(ct, cda); |
1075 | if (err < 0) | |
1076 | return err; | |
1077 | } | |
1078 | ||
df6fb868 | 1079 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1080 | err = ctnetlink_change_timeout(ct, cda); |
1081 | if (err < 0) | |
1082 | return err; | |
1083 | } | |
1084 | ||
df6fb868 | 1085 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1086 | err = ctnetlink_change_status(ct, cda); |
1087 | if (err < 0) | |
1088 | return err; | |
1089 | } | |
1090 | ||
df6fb868 | 1091 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1092 | err = ctnetlink_change_protoinfo(ct, cda); |
1093 | if (err < 0) | |
1094 | return err; | |
1095 | } | |
1096 | ||
bcd1e830 | 1097 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1098 | if (cda[CTA_MARK]) |
77236b6e | 1099 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1100 | #endif |
1101 | ||
13eae15a PNA |
1102 | #ifdef CONFIG_NF_NAT_NEEDED |
1103 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1104 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1105 | if (err < 0) | |
1106 | return err; | |
1107 | } | |
1108 | #endif | |
1109 | ||
c1d10adb PNA |
1110 | return 0; |
1111 | } | |
1112 | ||
19abb7b0 PNA |
1113 | static inline void |
1114 | ctnetlink_event_report(struct nf_conn *ct, u32 pid, int report) | |
1115 | { | |
1116 | unsigned int events = 0; | |
1117 | ||
1118 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) | |
1119 | events |= IPCT_RELATED; | |
1120 | else | |
1121 | events |= IPCT_NEW; | |
1122 | ||
1123 | nf_conntrack_event_report(IPCT_STATUS | | |
1124 | IPCT_HELPER | | |
1125 | IPCT_REFRESH | | |
1126 | IPCT_PROTOINFO | | |
1127 | IPCT_NATSEQADJ | | |
1128 | IPCT_MARK | | |
1129 | events, | |
1130 | ct, | |
1131 | pid, | |
1132 | report); | |
1133 | } | |
1134 | ||
f0a3c086 | 1135 | static struct nf_conn * |
df6fb868 | 1136 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1137 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1138 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1139 | u8 u3) |
c1d10adb PNA |
1140 | { |
1141 | struct nf_conn *ct; | |
1142 | int err = -EINVAL; | |
ceceae1b | 1143 | struct nf_conntrack_helper *helper; |
c1d10adb | 1144 | |
b54ad409 | 1145 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1146 | if (IS_ERR(ct)) |
f0a3c086 | 1147 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1148 | |
df6fb868 | 1149 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1150 | goto err1; |
77236b6e | 1151 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1152 | |
1153 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1154 | ct->status |= IPS_CONFIRMED; | |
1155 | ||
1575e7ea | 1156 | rcu_read_lock(); |
226c0c0e PNA |
1157 | if (cda[CTA_HELP]) { |
1158 | char *helpname; | |
1159 | ||
1160 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1161 | if (err < 0) |
1162 | goto err2; | |
226c0c0e PNA |
1163 | |
1164 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1165 | if (helper == NULL) { | |
1166 | rcu_read_unlock(); | |
1167 | #ifdef CONFIG_MODULES | |
1168 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1169 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1170 | goto err1; |
226c0c0e PNA |
1171 | } |
1172 | ||
1173 | rcu_read_lock(); | |
1174 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1175 | if (helper) { | |
226c0c0e | 1176 | err = -EAGAIN; |
0f5b3e85 | 1177 | goto err2; |
226c0c0e PNA |
1178 | } |
1179 | rcu_read_unlock(); | |
1180 | #endif | |
1181 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1182 | goto err1; |
226c0c0e PNA |
1183 | } else { |
1184 | struct nf_conn_help *help; | |
1185 | ||
1186 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1187 | if (help == NULL) { | |
226c0c0e | 1188 | err = -ENOMEM; |
0f5b3e85 | 1189 | goto err2; |
226c0c0e PNA |
1190 | } |
1191 | ||
1192 | /* not in hash table yet so not strictly necessary */ | |
1193 | rcu_assign_pointer(help->helper, helper); | |
1194 | } | |
1195 | } else { | |
1196 | /* try an implicit helper assignation */ | |
1197 | err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); | |
0f5b3e85 PM |
1198 | if (err < 0) |
1199 | goto err2; | |
1575e7ea PNA |
1200 | } |
1201 | ||
df6fb868 | 1202 | if (cda[CTA_STATUS]) { |
bbb3357d | 1203 | err = ctnetlink_change_status(ct, cda); |
0f5b3e85 PM |
1204 | if (err < 0) |
1205 | goto err2; | |
e6a7d3c0 PNA |
1206 | } |
1207 | ||
1208 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { | |
1209 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1210 | if (err < 0) |
1211 | goto err2; | |
bbb3357d | 1212 | } |
c1d10adb | 1213 | |
c969aa7d PNA |
1214 | #ifdef CONFIG_NF_NAT_NEEDED |
1215 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1216 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1217 | if (err < 0) |
1218 | goto err2; | |
c969aa7d PNA |
1219 | } |
1220 | #endif | |
1221 | ||
df6fb868 | 1222 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1223 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1224 | if (err < 0) |
1225 | goto err2; | |
c1d10adb PNA |
1226 | } |
1227 | ||
3ec19255 | 1228 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
58401572 | 1229 | |
bcd1e830 | 1230 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1231 | if (cda[CTA_MARK]) |
77236b6e | 1232 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1233 | #endif |
1234 | ||
5faa1f4c | 1235 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1236 | if (cda[CTA_TUPLE_MASTER]) { |
1237 | struct nf_conntrack_tuple master; | |
1238 | struct nf_conntrack_tuple_hash *master_h; | |
1239 | struct nf_conn *master_ct; | |
1240 | ||
1241 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1242 | if (err < 0) | |
0f5b3e85 | 1243 | goto err2; |
7ec47496 PNA |
1244 | |
1245 | master_h = __nf_conntrack_find(&init_net, &master); | |
1246 | if (master_h == NULL) { | |
1247 | err = -ENOENT; | |
0f5b3e85 | 1248 | goto err2; |
7ec47496 PNA |
1249 | } |
1250 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
1251 | nf_conntrack_get(&master_ct->ct_general); | |
f2a89004 | 1252 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1253 | ct->master = master_ct; |
f2a89004 | 1254 | } |
5faa1f4c | 1255 | |
c1d10adb PNA |
1256 | add_timer(&ct->timeout); |
1257 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1258 | rcu_read_unlock(); |
c1d10adb | 1259 | |
f0a3c086 | 1260 | return ct; |
0f5b3e85 PM |
1261 | |
1262 | err2: | |
1263 | rcu_read_unlock(); | |
1264 | err1: | |
c1d10adb | 1265 | nf_conntrack_free(ct); |
f0a3c086 | 1266 | return ERR_PTR(err); |
c1d10adb PNA |
1267 | } |
1268 | ||
601e68e1 YH |
1269 | static int |
1270 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1271 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1272 | { |
1273 | struct nf_conntrack_tuple otuple, rtuple; | |
1274 | struct nf_conntrack_tuple_hash *h = NULL; | |
1275 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1276 | u_int8_t u3 = nfmsg->nfgen_family; | |
1277 | int err = 0; | |
1278 | ||
df6fb868 | 1279 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1280 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1281 | if (err < 0) | |
1282 | return err; | |
1283 | } | |
1284 | ||
df6fb868 | 1285 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1286 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1287 | if (err < 0) | |
1288 | return err; | |
1289 | } | |
1290 | ||
f8ba1aff | 1291 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1292 | if (cda[CTA_TUPLE_ORIG]) |
400dad39 | 1293 | h = __nf_conntrack_find(&init_net, &otuple); |
df6fb868 | 1294 | else if (cda[CTA_TUPLE_REPLY]) |
400dad39 | 1295 | h = __nf_conntrack_find(&init_net, &rtuple); |
c1d10adb PNA |
1296 | |
1297 | if (h == NULL) { | |
c1d10adb | 1298 | err = -ENOENT; |
f0a3c086 PNA |
1299 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1300 | struct nf_conn *ct; | |
1301 | ||
1302 | ct = ctnetlink_create_conntrack(cda, &otuple, | |
1303 | &rtuple, u3); | |
1304 | if (IS_ERR(ct)) { | |
1305 | err = PTR_ERR(ct); | |
1306 | goto out_unlock; | |
1307 | } | |
1308 | err = 0; | |
1309 | nf_conntrack_get(&ct->ct_general); | |
1310 | spin_unlock_bh(&nf_conntrack_lock); | |
1311 | ctnetlink_event_report(ct, | |
1312 | NETLINK_CB(skb).pid, | |
1313 | nlmsg_report(nlh)); | |
1314 | nf_ct_put(ct); | |
1315 | } else | |
1316 | spin_unlock_bh(&nf_conntrack_lock); | |
1317 | ||
c1d10adb PNA |
1318 | return err; |
1319 | } | |
1320 | /* implicit 'else' */ | |
1321 | ||
c1d10adb PNA |
1322 | /* We manipulate the conntrack inside the global conntrack table lock, |
1323 | * so there's no need to increase the refcount */ | |
c1d10adb | 1324 | err = -EEXIST; |
ff4ca827 | 1325 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1326 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1327 | ||
19abb7b0 PNA |
1328 | err = ctnetlink_change_conntrack(ct, cda); |
1329 | if (err == 0) { | |
1330 | nf_conntrack_get(&ct->ct_general); | |
1331 | spin_unlock_bh(&nf_conntrack_lock); | |
1332 | ctnetlink_event_report(ct, | |
1333 | NETLINK_CB(skb).pid, | |
1334 | nlmsg_report(nlh)); | |
1335 | nf_ct_put(ct); | |
1336 | } else | |
1337 | spin_unlock_bh(&nf_conntrack_lock); | |
1338 | ||
1339 | return err; | |
ff4ca827 | 1340 | } |
c1d10adb PNA |
1341 | |
1342 | out_unlock: | |
f8ba1aff | 1343 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1344 | return err; |
1345 | } | |
1346 | ||
601e68e1 YH |
1347 | /*********************************************************************** |
1348 | * EXPECT | |
1349 | ***********************************************************************/ | |
c1d10adb PNA |
1350 | |
1351 | static inline int | |
1352 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1353 | const struct nf_conntrack_tuple *tuple, | |
1354 | enum ctattr_expect type) | |
1355 | { | |
df6fb868 | 1356 | struct nlattr *nest_parms; |
601e68e1 | 1357 | |
df6fb868 PM |
1358 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1359 | if (!nest_parms) | |
1360 | goto nla_put_failure; | |
c1d10adb | 1361 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1362 | goto nla_put_failure; |
1363 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1364 | |
1365 | return 0; | |
1366 | ||
df6fb868 | 1367 | nla_put_failure: |
c1d10adb | 1368 | return -1; |
601e68e1 | 1369 | } |
c1d10adb | 1370 | |
1cde6436 PNA |
1371 | static inline int |
1372 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1373 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1374 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1375 | { |
1376 | int ret; | |
1377 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1378 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1379 | struct nf_conntrack_tuple m; |
df6fb868 | 1380 | struct nlattr *nest_parms; |
d4156e8c PM |
1381 | |
1382 | memset(&m, 0xFF, sizeof(m)); | |
1383 | m.src.u.all = mask->src.u.all; | |
1384 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1385 | ||
df6fb868 PM |
1386 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1387 | if (!nest_parms) | |
1388 | goto nla_put_failure; | |
1cde6436 | 1389 | |
528a3a6f | 1390 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1391 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1392 | |
1393 | if (unlikely(ret < 0)) | |
df6fb868 | 1394 | goto nla_put_failure; |
1cde6436 | 1395 | |
528a3a6f | 1396 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1397 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1398 | if (unlikely(ret < 0)) |
df6fb868 | 1399 | goto nla_put_failure; |
1cde6436 | 1400 | |
df6fb868 | 1401 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1402 | |
1403 | return 0; | |
1404 | ||
df6fb868 | 1405 | nla_put_failure: |
1cde6436 PNA |
1406 | return -1; |
1407 | } | |
1408 | ||
bb5cf80e | 1409 | static int |
c1d10adb | 1410 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1411 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1412 | { |
1413 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1414 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1415 | ||
1416 | if (timeout < 0) | |
1417 | timeout = 0; | |
c1d10adb PNA |
1418 | |
1419 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1420 | goto nla_put_failure; |
1cde6436 | 1421 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1422 | goto nla_put_failure; |
c1d10adb PNA |
1423 | if (ctnetlink_exp_dump_tuple(skb, |
1424 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1425 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1426 | goto nla_put_failure; |
601e68e1 | 1427 | |
d978e5da | 1428 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1429 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1430 | |
1431 | return 0; | |
601e68e1 | 1432 | |
df6fb868 | 1433 | nla_put_failure: |
c1d10adb PNA |
1434 | return -1; |
1435 | } | |
1436 | ||
1437 | static int | |
1438 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
601e68e1 YH |
1439 | int event, |
1440 | int nowait, | |
c1d10adb PNA |
1441 | const struct nf_conntrack_expect *exp) |
1442 | { | |
1443 | struct nlmsghdr *nlh; | |
1444 | struct nfgenmsg *nfmsg; | |
27a884dc | 1445 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1446 | |
1447 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1448 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1449 | nfmsg = NLMSG_DATA(nlh); | |
1450 | ||
1451 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; | |
1452 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1453 | nfmsg->version = NFNETLINK_V0; | |
1454 | nfmsg->res_id = 0; | |
1455 | ||
1456 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1457 | goto nla_put_failure; |
c1d10adb | 1458 | |
27a884dc | 1459 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1460 | return skb->len; |
1461 | ||
1462 | nlmsg_failure: | |
df6fb868 | 1463 | nla_put_failure: |
dc5fc579 | 1464 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1465 | return -1; |
1466 | } | |
1467 | ||
1468 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1469 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1470 | unsigned long events, void *ptr) | |
1471 | { | |
1472 | struct nlmsghdr *nlh; | |
1473 | struct nfgenmsg *nfmsg; | |
19abb7b0 PNA |
1474 | struct nf_exp_event *item = (struct nf_exp_event *)ptr; |
1475 | struct nf_conntrack_expect *exp = item->exp; | |
c1d10adb PNA |
1476 | struct sk_buff *skb; |
1477 | unsigned int type; | |
27a884dc | 1478 | sk_buff_data_t b; |
c1d10adb PNA |
1479 | int flags = 0; |
1480 | ||
1481 | if (events & IPEXP_NEW) { | |
1482 | type = IPCTNL_MSG_EXP_NEW; | |
1483 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1484 | } else | |
1485 | return NOTIFY_DONE; | |
1486 | ||
1f9da256 PNA |
1487 | if (!item->report && |
1488 | !nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) | |
b3a27bfb PNA |
1489 | return NOTIFY_DONE; |
1490 | ||
c1d10adb PNA |
1491 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1492 | if (!skb) | |
1493 | return NOTIFY_DONE; | |
1494 | ||
1495 | b = skb->tail; | |
1496 | ||
b633ad5f | 1497 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
19abb7b0 | 1498 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
1499 | nfmsg = NLMSG_DATA(nlh); |
1500 | ||
1501 | nlh->nlmsg_flags = flags; | |
1502 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1503 | nfmsg->version = NFNETLINK_V0; | |
1504 | nfmsg->res_id = 0; | |
1505 | ||
528a3a6f | 1506 | rcu_read_lock(); |
c1d10adb | 1507 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1508 | goto nla_put_failure; |
528a3a6f | 1509 | rcu_read_unlock(); |
c1d10adb PNA |
1510 | |
1511 | nlh->nlmsg_len = skb->tail - b; | |
19abb7b0 | 1512 | nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report); |
c1d10adb PNA |
1513 | return NOTIFY_DONE; |
1514 | ||
df6fb868 | 1515 | nla_put_failure: |
528a3a6f PNA |
1516 | rcu_read_unlock(); |
1517 | nlmsg_failure: | |
dd5b6ce6 | 1518 | nfnetlink_set_err(0, 0, -ENOBUFS); |
c1d10adb PNA |
1519 | kfree_skb(skb); |
1520 | return NOTIFY_DONE; | |
1521 | } | |
1522 | #endif | |
cf6994c2 PM |
1523 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1524 | { | |
31f15875 PM |
1525 | if (cb->args[1]) |
1526 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1527 | return 0; |
1528 | } | |
c1d10adb PNA |
1529 | |
1530 | static int | |
1531 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1532 | { | |
9b03f38d | 1533 | struct net *net = &init_net; |
cf6994c2 | 1534 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1535 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1536 | struct hlist_node *n; |
87711cb8 | 1537 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1538 | |
7d0742da | 1539 | rcu_read_lock(); |
31f15875 PM |
1540 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1541 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1542 | restart: |
9b03f38d | 1543 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1544 | hnode) { |
1545 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1546 | continue; |
31f15875 PM |
1547 | if (cb->args[1]) { |
1548 | if (exp != last) | |
1549 | continue; | |
1550 | cb->args[1] = 0; | |
1551 | } | |
1552 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, | |
1553 | cb->nlh->nlmsg_seq, | |
1554 | IPCTNL_MSG_EXP_NEW, | |
1555 | 1, exp) < 0) { | |
7d0742da PM |
1556 | if (!atomic_inc_not_zero(&exp->use)) |
1557 | continue; | |
31f15875 PM |
1558 | cb->args[1] = (unsigned long)exp; |
1559 | goto out; | |
1560 | } | |
cf6994c2 | 1561 | } |
31f15875 PM |
1562 | if (cb->args[1]) { |
1563 | cb->args[1] = 0; | |
1564 | goto restart; | |
cf6994c2 PM |
1565 | } |
1566 | } | |
601e68e1 | 1567 | out: |
7d0742da | 1568 | rcu_read_unlock(); |
cf6994c2 PM |
1569 | if (last) |
1570 | nf_ct_expect_put(last); | |
c1d10adb | 1571 | |
c1d10adb PNA |
1572 | return skb->len; |
1573 | } | |
1574 | ||
f73e924c PM |
1575 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1576 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1577 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1578 | }; |
1579 | ||
1580 | static int | |
601e68e1 | 1581 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1582 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1583 | { |
1584 | struct nf_conntrack_tuple tuple; | |
1585 | struct nf_conntrack_expect *exp; | |
1586 | struct sk_buff *skb2; | |
1587 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1588 | u_int8_t u3 = nfmsg->nfgen_family; | |
1589 | int err = 0; | |
1590 | ||
c1d10adb | 1591 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1592 | return netlink_dump_start(ctnl, skb, nlh, |
1593 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1594 | ctnetlink_exp_done); |
c1d10adb PNA |
1595 | } |
1596 | ||
df6fb868 | 1597 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1598 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1599 | else | |
1600 | return -EINVAL; | |
1601 | ||
1602 | if (err < 0) | |
1603 | return err; | |
1604 | ||
9b03f38d | 1605 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1606 | if (!exp) |
1607 | return -ENOENT; | |
1608 | ||
df6fb868 | 1609 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1610 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1611 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1612 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1613 | return -ENOENT; |
1614 | } | |
601e68e1 | 1615 | } |
c1d10adb PNA |
1616 | |
1617 | err = -ENOMEM; | |
1618 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1619 | if (!skb2) | |
1620 | goto out; | |
4e9b8269 | 1621 | |
528a3a6f | 1622 | rcu_read_lock(); |
601e68e1 | 1623 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
c1d10adb PNA |
1624 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
1625 | 1, exp); | |
528a3a6f | 1626 | rcu_read_unlock(); |
c1d10adb PNA |
1627 | if (err <= 0) |
1628 | goto free; | |
1629 | ||
6823645d | 1630 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1631 | |
1632 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1633 | ||
1634 | free: | |
1635 | kfree_skb(skb2); | |
1636 | out: | |
6823645d | 1637 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1638 | return err; |
1639 | } | |
1640 | ||
1641 | static int | |
601e68e1 | 1642 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1643 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1644 | { |
31f15875 | 1645 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1646 | struct nf_conntrack_tuple tuple; |
1647 | struct nf_conntrack_helper *h; | |
1648 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1649 | struct hlist_node *n, *next; |
c1d10adb | 1650 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1651 | unsigned int i; |
c1d10adb PNA |
1652 | int err; |
1653 | ||
df6fb868 | 1654 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1655 | /* delete a single expect by tuple */ |
1656 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1657 | if (err < 0) | |
1658 | return err; | |
1659 | ||
1660 | /* bump usage count to 2 */ | |
9b03f38d | 1661 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1662 | if (!exp) |
1663 | return -ENOENT; | |
1664 | ||
df6fb868 | 1665 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1666 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1667 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1668 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1669 | return -ENOENT; |
1670 | } | |
1671 | } | |
1672 | ||
1673 | /* after list removal, usage count == 1 */ | |
6823645d | 1674 | nf_ct_unexpect_related(exp); |
601e68e1 | 1675 | /* have to put what we 'get' above. |
c1d10adb | 1676 | * after this line usage count == 0 */ |
6823645d | 1677 | nf_ct_expect_put(exp); |
df6fb868 PM |
1678 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1679 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1680 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1681 | |
1682 | /* delete all expectations for this helper */ | |
f8ba1aff | 1683 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1684 | h = __nf_conntrack_helper_find_byname(name); |
1685 | if (!h) { | |
f8ba1aff | 1686 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1687 | return -EOPNOTSUPP; |
c1d10adb | 1688 | } |
31f15875 PM |
1689 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1690 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1691 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1692 | hnode) { |
1693 | m_help = nfct_help(exp->master); | |
1694 | if (m_help->helper == h | |
1695 | && del_timer(&exp->timeout)) { | |
1696 | nf_ct_unlink_expect(exp); | |
1697 | nf_ct_expect_put(exp); | |
1698 | } | |
c1d10adb PNA |
1699 | } |
1700 | } | |
f8ba1aff | 1701 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1702 | } else { |
1703 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1704 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1705 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1706 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1707 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1708 | hnode) { |
1709 | if (del_timer(&exp->timeout)) { | |
1710 | nf_ct_unlink_expect(exp); | |
1711 | nf_ct_expect_put(exp); | |
1712 | } | |
c1d10adb PNA |
1713 | } |
1714 | } | |
f8ba1aff | 1715 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1716 | } |
1717 | ||
1718 | return 0; | |
1719 | } | |
1720 | static int | |
df6fb868 | 1721 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1722 | { |
1723 | return -EOPNOTSUPP; | |
1724 | } | |
1725 | ||
1726 | static int | |
19abb7b0 | 1727 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) |
c1d10adb PNA |
1728 | { |
1729 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1730 | struct nf_conntrack_tuple_hash *h = NULL; | |
1731 | struct nf_conntrack_expect *exp; | |
1732 | struct nf_conn *ct; | |
dc808fe2 | 1733 | struct nf_conn_help *help; |
c1d10adb PNA |
1734 | int err = 0; |
1735 | ||
c1d10adb PNA |
1736 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1737 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1738 | if (err < 0) | |
1739 | return err; | |
1740 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1741 | if (err < 0) | |
1742 | return err; | |
1743 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1744 | if (err < 0) | |
1745 | return err; | |
1746 | ||
1747 | /* Look for master conntrack of this expectation */ | |
400dad39 | 1748 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
c1d10adb PNA |
1749 | if (!h) |
1750 | return -ENOENT; | |
1751 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1752 | help = nfct_help(ct); |
c1d10adb | 1753 | |
dc808fe2 | 1754 | if (!help || !help->helper) { |
c1d10adb | 1755 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1756 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1757 | goto out; |
1758 | } | |
1759 | ||
6823645d | 1760 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1761 | if (!exp) { |
1762 | err = -ENOMEM; | |
1763 | goto out; | |
1764 | } | |
601e68e1 | 1765 | |
c1d10adb PNA |
1766 | exp->expectfn = NULL; |
1767 | exp->flags = 0; | |
1768 | exp->master = ct; | |
9457d851 | 1769 | exp->helper = NULL; |
c1d10adb | 1770 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1771 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1772 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1773 | |
19abb7b0 | 1774 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1775 | nf_ct_expect_put(exp); |
c1d10adb | 1776 | |
601e68e1 | 1777 | out: |
c1d10adb PNA |
1778 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1779 | return err; | |
1780 | } | |
1781 | ||
1782 | static int | |
1783 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1784 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1785 | { |
1786 | struct nf_conntrack_tuple tuple; | |
1787 | struct nf_conntrack_expect *exp; | |
1788 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1789 | u_int8_t u3 = nfmsg->nfgen_family; | |
1790 | int err = 0; | |
1791 | ||
df6fb868 PM |
1792 | if (!cda[CTA_EXPECT_TUPLE] |
1793 | || !cda[CTA_EXPECT_MASK] | |
1794 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1795 | return -EINVAL; |
1796 | ||
1797 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1798 | if (err < 0) | |
1799 | return err; | |
1800 | ||
f8ba1aff | 1801 | spin_lock_bh(&nf_conntrack_lock); |
9b03f38d | 1802 | exp = __nf_ct_expect_find(&init_net, &tuple); |
c1d10adb PNA |
1803 | |
1804 | if (!exp) { | |
f8ba1aff | 1805 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1806 | err = -ENOENT; |
19abb7b0 PNA |
1807 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1808 | err = ctnetlink_create_expect(cda, | |
1809 | u3, | |
1810 | NETLINK_CB(skb).pid, | |
1811 | nlmsg_report(nlh)); | |
1812 | } | |
c1d10adb PNA |
1813 | return err; |
1814 | } | |
1815 | ||
1816 | err = -EEXIST; | |
1817 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1818 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1819 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1820 | |
c1d10adb PNA |
1821 | return err; |
1822 | } | |
1823 | ||
1824 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1825 | static struct notifier_block ctnl_notifier = { | |
1826 | .notifier_call = ctnetlink_conntrack_event, | |
1827 | }; | |
1828 | ||
1829 | static struct notifier_block ctnl_notifier_exp = { | |
1830 | .notifier_call = ctnetlink_expect_event, | |
1831 | }; | |
1832 | #endif | |
1833 | ||
7c8d4cb4 | 1834 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1835 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1836 | .attr_count = CTA_MAX, |
1837 | .policy = ct_nla_policy }, | |
c1d10adb | 1838 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1839 | .attr_count = CTA_MAX, |
1840 | .policy = ct_nla_policy }, | |
c1d10adb | 1841 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1842 | .attr_count = CTA_MAX, |
1843 | .policy = ct_nla_policy }, | |
c1d10adb | 1844 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1845 | .attr_count = CTA_MAX, |
1846 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1847 | }; |
1848 | ||
7c8d4cb4 | 1849 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1850 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1851 | .attr_count = CTA_EXPECT_MAX, |
1852 | .policy = exp_nla_policy }, | |
c1d10adb | 1853 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1854 | .attr_count = CTA_EXPECT_MAX, |
1855 | .policy = exp_nla_policy }, | |
c1d10adb | 1856 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1857 | .attr_count = CTA_EXPECT_MAX, |
1858 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1859 | }; |
1860 | ||
7c8d4cb4 | 1861 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1862 | .name = "conntrack", |
1863 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1864 | .cb_count = IPCTNL_MSG_MAX, | |
1865 | .cb = ctnl_cb, | |
1866 | }; | |
1867 | ||
7c8d4cb4 | 1868 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1869 | .name = "conntrack_expect", |
1870 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1871 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1872 | .cb = ctnl_exp_cb, | |
1873 | }; | |
1874 | ||
d2483dde | 1875 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1876 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1877 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1878 | |
1879 | static int __init ctnetlink_init(void) | |
1880 | { | |
1881 | int ret; | |
1882 | ||
1883 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1884 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1885 | if (ret < 0) { | |
1886 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1887 | goto err_out; | |
1888 | } | |
1889 | ||
1890 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1891 | if (ret < 0) { | |
1892 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1893 | goto err_unreg_subsys; | |
1894 | } | |
1895 | ||
1896 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1897 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1898 | if (ret < 0) { | |
1899 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1900 | goto err_unreg_exp_subsys; | |
1901 | } | |
1902 | ||
6823645d | 1903 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1904 | if (ret < 0) { |
1905 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1906 | goto err_unreg_notifier; | |
1907 | } | |
1908 | #endif | |
1909 | ||
1910 | return 0; | |
1911 | ||
1912 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1913 | err_unreg_notifier: | |
1914 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1915 | err_unreg_exp_subsys: | |
1916 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1917 | #endif | |
1918 | err_unreg_subsys: | |
1919 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1920 | err_out: | |
1921 | return ret; | |
1922 | } | |
1923 | ||
1924 | static void __exit ctnetlink_exit(void) | |
1925 | { | |
1926 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1927 | ||
1928 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1929 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1930 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1931 | #endif | |
1932 | ||
1933 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1934 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1935 | return; | |
1936 | } | |
1937 | ||
1938 | module_init(ctnetlink_init); | |
1939 | module_exit(ctnetlink_exit); |