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Commit | Line | Data |
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c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
0adf9d67 | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/netlink.h> | |
28 | #include <linux/spinlock.h> | |
40a839fd | 29 | #include <linux/interrupt.h> |
c1d10adb PNA |
30 | #include <linux/notifier.h> |
31 | ||
32 | #include <linux/netfilter.h> | |
dc5fc579 | 33 | #include <net/netlink.h> |
c1d10adb PNA |
34 | #include <net/netfilter/nf_conntrack.h> |
35 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 36 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
37 | #include <net/netfilter/nf_conntrack_helper.h> |
38 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 39 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 40 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 41 | #include <net/netfilter/nf_conntrack_acct.h> |
5b1158e9 JK |
42 | #ifdef CONFIG_NF_NAT_NEEDED |
43 | #include <net/netfilter/nf_nat_core.h> | |
44 | #include <net/netfilter/nf_nat_protocol.h> | |
45 | #endif | |
c1d10adb PNA |
46 | |
47 | #include <linux/netfilter/nfnetlink.h> | |
48 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
49 | ||
50 | MODULE_LICENSE("GPL"); | |
51 | ||
dc808fe2 | 52 | static char __initdata version[] = "0.93"; |
c1d10adb | 53 | |
c1d10adb | 54 | static inline int |
601e68e1 | 55 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 56 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 57 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 58 | { |
c1d10adb | 59 | int ret = 0; |
df6fb868 | 60 | struct nlattr *nest_parms; |
c1d10adb | 61 | |
df6fb868 PM |
62 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
63 | if (!nest_parms) | |
64 | goto nla_put_failure; | |
77236b6e | 65 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 66 | |
fdf70832 PM |
67 | if (likely(l4proto->tuple_to_nlattr)) |
68 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 69 | |
df6fb868 | 70 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
71 | |
72 | return ret; | |
73 | ||
df6fb868 | 74 | nla_put_failure: |
c1d10adb PNA |
75 | return -1; |
76 | } | |
77 | ||
78 | static inline int | |
1cde6436 PNA |
79 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
80 | const struct nf_conntrack_tuple *tuple, | |
81 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 82 | { |
c1d10adb | 83 | int ret = 0; |
df6fb868 PM |
84 | struct nlattr *nest_parms; |
85 | ||
86 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
87 | if (!nest_parms) | |
88 | goto nla_put_failure; | |
1cde6436 | 89 | |
fdf70832 PM |
90 | if (likely(l3proto->tuple_to_nlattr)) |
91 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 92 | |
df6fb868 | 93 | nla_nest_end(skb, nest_parms); |
c1d10adb | 94 | |
1cde6436 PNA |
95 | return ret; |
96 | ||
df6fb868 | 97 | nla_put_failure: |
1cde6436 PNA |
98 | return -1; |
99 | } | |
100 | ||
bb5cf80e | 101 | static int |
1cde6436 PNA |
102 | ctnetlink_dump_tuples(struct sk_buff *skb, |
103 | const struct nf_conntrack_tuple *tuple) | |
104 | { | |
105 | int ret; | |
106 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 107 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 108 | |
528a3a6f | 109 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 110 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
111 | |
112 | if (unlikely(ret < 0)) | |
113 | return ret; | |
114 | ||
528a3a6f | 115 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 116 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
117 | |
118 | return ret; | |
c1d10adb PNA |
119 | } |
120 | ||
121 | static inline int | |
122 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
123 | { | |
77236b6e | 124 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
125 | return 0; |
126 | ||
df6fb868 | 127 | nla_put_failure: |
c1d10adb PNA |
128 | return -1; |
129 | } | |
130 | ||
131 | static inline int | |
132 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
133 | { | |
77236b6e | 134 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 135 | |
77236b6e | 136 | if (timeout < 0) |
c1d10adb | 137 | timeout = 0; |
601e68e1 | 138 | |
77236b6e | 139 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
140 | return 0; |
141 | ||
df6fb868 | 142 | nla_put_failure: |
c1d10adb PNA |
143 | return -1; |
144 | } | |
145 | ||
146 | static inline int | |
147 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
148 | { | |
5e8fbe2a | 149 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 150 | struct nlattr *nest_proto; |
c1d10adb PNA |
151 | int ret; |
152 | ||
528a3a6f PNA |
153 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
154 | if (!l4proto->to_nlattr) | |
c1d10adb | 155 | return 0; |
601e68e1 | 156 | |
df6fb868 PM |
157 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
158 | if (!nest_proto) | |
159 | goto nla_put_failure; | |
c1d10adb | 160 | |
fdf70832 | 161 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 162 | |
df6fb868 | 163 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
164 | |
165 | return ret; | |
166 | ||
df6fb868 | 167 | nla_put_failure: |
c1d10adb PNA |
168 | return -1; |
169 | } | |
170 | ||
171 | static inline int | |
172 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
173 | { | |
df6fb868 | 174 | struct nlattr *nest_helper; |
dc808fe2 | 175 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 176 | struct nf_conntrack_helper *helper; |
c1d10adb | 177 | |
3c158f7f | 178 | if (!help) |
c1d10adb | 179 | return 0; |
601e68e1 | 180 | |
3c158f7f PM |
181 | helper = rcu_dereference(help->helper); |
182 | if (!helper) | |
183 | goto out; | |
184 | ||
df6fb868 PM |
185 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
186 | if (!nest_helper) | |
187 | goto nla_put_failure; | |
77236b6e | 188 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 189 | |
fdf70832 PM |
190 | if (helper->to_nlattr) |
191 | helper->to_nlattr(skb, ct); | |
c1d10adb | 192 | |
df6fb868 | 193 | nla_nest_end(skb, nest_helper); |
3c158f7f | 194 | out: |
c1d10adb PNA |
195 | return 0; |
196 | ||
df6fb868 | 197 | nla_put_failure: |
c1d10adb PNA |
198 | return -1; |
199 | } | |
200 | ||
bb5cf80e | 201 | static int |
c1d10adb PNA |
202 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
203 | enum ip_conntrack_dir dir) | |
204 | { | |
205 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 206 | struct nlattr *nest_count; |
58401572 KPO |
207 | const struct nf_conn_counter *acct; |
208 | ||
209 | acct = nf_conn_acct_find(ct); | |
210 | if (!acct) | |
211 | return 0; | |
c1d10adb | 212 | |
df6fb868 PM |
213 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
214 | if (!nest_count) | |
215 | goto nla_put_failure; | |
216 | ||
58401572 KPO |
217 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
218 | cpu_to_be64(acct[dir].packets)); | |
219 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
220 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 221 | |
df6fb868 | 222 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
223 | |
224 | return 0; | |
225 | ||
df6fb868 | 226 | nla_put_failure: |
c1d10adb PNA |
227 | return -1; |
228 | } | |
c1d10adb PNA |
229 | |
230 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
231 | static inline int | |
232 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
233 | { | |
77236b6e | 234 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
235 | return 0; |
236 | ||
df6fb868 | 237 | nla_put_failure: |
c1d10adb PNA |
238 | return -1; |
239 | } | |
240 | #else | |
241 | #define ctnetlink_dump_mark(a, b) (0) | |
242 | #endif | |
243 | ||
37fccd85 PNA |
244 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
245 | static inline int | |
246 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
247 | { | |
77236b6e | 248 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
249 | return 0; |
250 | ||
251 | nla_put_failure: | |
252 | return -1; | |
253 | } | |
254 | #else | |
255 | #define ctnetlink_dump_secmark(a, b) (0) | |
256 | #endif | |
257 | ||
0f417ce9 PNA |
258 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
259 | ||
260 | static inline int | |
261 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
262 | { | |
263 | struct nlattr *nest_parms; | |
264 | ||
265 | if (!(ct->status & IPS_EXPECTED)) | |
266 | return 0; | |
267 | ||
268 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
269 | if (!nest_parms) | |
270 | goto nla_put_failure; | |
271 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
272 | goto nla_put_failure; | |
273 | nla_nest_end(skb, nest_parms); | |
274 | ||
275 | return 0; | |
276 | ||
277 | nla_put_failure: | |
278 | return -1; | |
279 | } | |
280 | ||
13eae15a | 281 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 282 | static int |
13eae15a PNA |
283 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
284 | { | |
13eae15a PNA |
285 | struct nlattr *nest_parms; |
286 | ||
287 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
288 | if (!nest_parms) | |
289 | goto nla_put_failure; | |
290 | ||
77236b6e PM |
291 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
292 | htonl(natseq->correction_pos)); | |
293 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
294 | htonl(natseq->offset_before)); | |
295 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
296 | htonl(natseq->offset_after)); | |
13eae15a PNA |
297 | |
298 | nla_nest_end(skb, nest_parms); | |
299 | ||
300 | return 0; | |
301 | ||
302 | nla_put_failure: | |
303 | return -1; | |
304 | } | |
305 | ||
306 | static inline int | |
307 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
308 | { | |
309 | struct nf_nat_seq *natseq; | |
310 | struct nf_conn_nat *nat = nfct_nat(ct); | |
311 | ||
312 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
313 | return 0; | |
314 | ||
315 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
316 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
317 | return -1; | |
318 | ||
319 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
320 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
321 | return -1; | |
322 | ||
323 | return 0; | |
324 | } | |
325 | #else | |
326 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
327 | #endif | |
328 | ||
c1d10adb PNA |
329 | static inline int |
330 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
331 | { | |
77236b6e | 332 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
333 | return 0; |
334 | ||
df6fb868 | 335 | nla_put_failure: |
c1d10adb PNA |
336 | return -1; |
337 | } | |
338 | ||
339 | static inline int | |
340 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
341 | { | |
77236b6e | 342 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
343 | return 0; |
344 | ||
df6fb868 | 345 | nla_put_failure: |
c1d10adb PNA |
346 | return -1; |
347 | } | |
348 | ||
c1d10adb PNA |
349 | static int |
350 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 351 | int event, const struct nf_conn *ct) |
c1d10adb PNA |
352 | { |
353 | struct nlmsghdr *nlh; | |
354 | struct nfgenmsg *nfmsg; | |
df6fb868 | 355 | struct nlattr *nest_parms; |
96bcf938 | 356 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
357 | |
358 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
96bcf938 PNA |
359 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
360 | if (nlh == NULL) | |
361 | goto nlmsg_failure; | |
c1d10adb | 362 | |
96bcf938 | 363 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 364 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
365 | nfmsg->version = NFNETLINK_V0; |
366 | nfmsg->res_id = 0; | |
367 | ||
df6fb868 PM |
368 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
369 | if (!nest_parms) | |
370 | goto nla_put_failure; | |
f2f3e38c | 371 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
372 | goto nla_put_failure; |
373 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 374 | |
df6fb868 PM |
375 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
376 | if (!nest_parms) | |
377 | goto nla_put_failure; | |
f2f3e38c | 378 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
379 | goto nla_put_failure; |
380 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
381 | |
382 | if (ctnetlink_dump_status(skb, ct) < 0 || | |
383 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
384 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
385 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
386 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
387 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
388 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 389 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 390 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 391 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 392 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 393 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 394 | goto nla_put_failure; |
c1d10adb | 395 | |
96bcf938 | 396 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
397 | return skb->len; |
398 | ||
399 | nlmsg_failure: | |
df6fb868 | 400 | nla_put_failure: |
96bcf938 | 401 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
402 | return -1; |
403 | } | |
404 | ||
405 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
03b64f51 PNA |
406 | static inline size_t |
407 | ctnetlink_proto_size(const struct nf_conn *ct) | |
2732c4e4 HE |
408 | { |
409 | struct nf_conntrack_l3proto *l3proto; | |
410 | struct nf_conntrack_l4proto *l4proto; | |
03b64f51 PNA |
411 | size_t len = 0; |
412 | ||
413 | rcu_read_lock(); | |
414 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); | |
415 | len += l3proto->nla_size; | |
416 | ||
417 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
418 | len += l4proto->nla_size; | |
419 | rcu_read_unlock(); | |
420 | ||
421 | return len; | |
422 | } | |
423 | ||
424 | static inline size_t | |
425 | ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
426 | { | |
427 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
428 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
429 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
430 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
431 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
432 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
433 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
d271e8bd | 434 | #ifdef CONFIG_NF_CT_ACCT |
03b64f51 PNA |
435 | + 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
436 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ | |
437 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
d271e8bd | 438 | #endif |
03b64f51 PNA |
439 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
440 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
441 | + nla_total_size(0) /* CTA_HELP */ | |
442 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
d271e8bd | 443 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
03b64f51 | 444 | + nla_total_size(sizeof(u_int32_t)) /* CTA_SECMARK */ |
d271e8bd HE |
445 | #endif |
446 | #ifdef CONFIG_NF_NAT_NEEDED | |
03b64f51 PNA |
447 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
448 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
449 | #endif |
450 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 451 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
d271e8bd | 452 | #endif |
03b64f51 PNA |
453 | + ctnetlink_proto_size(ct) |
454 | ; | |
2732c4e4 HE |
455 | } |
456 | ||
c1d10adb | 457 | static int ctnetlink_conntrack_event(struct notifier_block *this, |
601e68e1 | 458 | unsigned long events, void *ptr) |
c1d10adb PNA |
459 | { |
460 | struct nlmsghdr *nlh; | |
461 | struct nfgenmsg *nfmsg; | |
df6fb868 | 462 | struct nlattr *nest_parms; |
19abb7b0 PNA |
463 | struct nf_ct_event *item = (struct nf_ct_event *)ptr; |
464 | struct nf_conn *ct = item->ct; | |
c1d10adb PNA |
465 | struct sk_buff *skb; |
466 | unsigned int type; | |
c1d10adb PNA |
467 | unsigned int flags = 0, group; |
468 | ||
469 | /* ignore our fake conntrack entry */ | |
470 | if (ct == &nf_conntrack_untracked) | |
471 | return NOTIFY_DONE; | |
472 | ||
473 | if (events & IPCT_DESTROY) { | |
474 | type = IPCTNL_MSG_CT_DELETE; | |
475 | group = NFNLGRP_CONNTRACK_DESTROY; | |
476 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { | |
477 | type = IPCTNL_MSG_CT_NEW; | |
478 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 479 | group = NFNLGRP_CONNTRACK_NEW; |
17e6e4ea | 480 | } else if (events) { |
c1d10adb PNA |
481 | type = IPCTNL_MSG_CT_NEW; |
482 | group = NFNLGRP_CONNTRACK_UPDATE; | |
483 | } else | |
484 | return NOTIFY_DONE; | |
a2427692 | 485 | |
1f9da256 | 486 | if (!item->report && !nfnetlink_has_listeners(group)) |
a2427692 PM |
487 | return NOTIFY_DONE; |
488 | ||
03b64f51 PNA |
489 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
490 | if (skb == NULL) | |
150ace0d | 491 | goto errout; |
c1d10adb | 492 | |
c1d10adb | 493 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
96bcf938 PNA |
494 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
495 | if (nlh == NULL) | |
496 | goto nlmsg_failure; | |
c1d10adb | 497 | |
96bcf938 | 498 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 499 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
500 | nfmsg->version = NFNETLINK_V0; |
501 | nfmsg->res_id = 0; | |
502 | ||
528a3a6f | 503 | rcu_read_lock(); |
df6fb868 PM |
504 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
505 | if (!nest_parms) | |
506 | goto nla_put_failure; | |
f2f3e38c | 507 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
508 | goto nla_put_failure; |
509 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 510 | |
df6fb868 PM |
511 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
512 | if (!nest_parms) | |
513 | goto nla_put_failure; | |
f2f3e38c | 514 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
515 | goto nla_put_failure; |
516 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 517 | |
1eedf699 EL |
518 | if (ctnetlink_dump_id(skb, ct) < 0) |
519 | goto nla_put_failure; | |
520 | ||
e57dce60 FH |
521 | if (ctnetlink_dump_status(skb, ct) < 0) |
522 | goto nla_put_failure; | |
523 | ||
7b621c1e PNA |
524 | if (events & IPCT_DESTROY) { |
525 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
526 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 527 | goto nla_put_failure; |
7b621c1e | 528 | } else { |
7b621c1e | 529 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 530 | goto nla_put_failure; |
7b621c1e PNA |
531 | |
532 | if (events & IPCT_PROTOINFO | |
533 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 534 | goto nla_put_failure; |
7b621c1e PNA |
535 | |
536 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
537 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 538 | goto nla_put_failure; |
7b621c1e | 539 | |
37fccd85 PNA |
540 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
541 | if ((events & IPCT_SECMARK || ct->secmark) | |
542 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
543 | goto nla_put_failure; | |
544 | #endif | |
7b621c1e | 545 | |
0f417ce9 PNA |
546 | if (events & IPCT_RELATED && |
547 | ctnetlink_dump_master(skb, ct) < 0) | |
548 | goto nla_put_failure; | |
549 | ||
13eae15a PNA |
550 | if (events & IPCT_NATSEQADJ && |
551 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
552 | goto nla_put_failure; | |
7b621c1e | 553 | } |
b9a37e0c | 554 | |
a83099a6 EL |
555 | #ifdef CONFIG_NF_CONNTRACK_MARK |
556 | if ((events & IPCT_MARK || ct->mark) | |
557 | && ctnetlink_dump_mark(skb, ct) < 0) | |
558 | goto nla_put_failure; | |
559 | #endif | |
528a3a6f | 560 | rcu_read_unlock(); |
a83099a6 | 561 | |
96bcf938 | 562 | nlmsg_end(skb, nlh); |
19abb7b0 | 563 | nfnetlink_send(skb, item->pid, group, item->report); |
c1d10adb PNA |
564 | return NOTIFY_DONE; |
565 | ||
df6fb868 | 566 | nla_put_failure: |
528a3a6f | 567 | rcu_read_unlock(); |
96bcf938 | 568 | nlmsg_cancel(skb, nlh); |
528a3a6f | 569 | nlmsg_failure: |
c1d10adb | 570 | kfree_skb(skb); |
150ace0d PNA |
571 | errout: |
572 | nfnetlink_set_err(0, group, -ENOBUFS); | |
c1d10adb PNA |
573 | return NOTIFY_DONE; |
574 | } | |
575 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
576 | ||
577 | static int ctnetlink_done(struct netlink_callback *cb) | |
578 | { | |
89f2e218 PM |
579 | if (cb->args[1]) |
580 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
581 | return 0; |
582 | } | |
583 | ||
584 | static int | |
585 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
586 | { | |
89f2e218 | 587 | struct nf_conn *ct, *last; |
c1d10adb | 588 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 589 | struct hlist_nulls_node *n; |
96bcf938 | 590 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 591 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 592 | |
76507f69 | 593 | rcu_read_lock(); |
d205dc40 | 594 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
595 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
596 | restart: | |
ea781f19 ED |
597 | hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
598 | hnnode) { | |
5b1158e9 | 599 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
600 | continue; |
601 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
602 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
603 | continue; | |
87711cb8 PNA |
604 | /* Dump entries of a given L3 protocol number. |
605 | * If it is not specified, ie. l3proto == 0, | |
606 | * then dump everything. */ | |
5e8fbe2a | 607 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 608 | goto releasect; |
d205dc40 PM |
609 | if (cb->args[1]) { |
610 | if (ct != last) | |
ea781f19 | 611 | goto releasect; |
d205dc40 | 612 | cb->args[1] = 0; |
89f2e218 | 613 | } |
c1d10adb | 614 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 615 | cb->nlh->nlmsg_seq, |
8b0a231d | 616 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
89f2e218 | 617 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 618 | goto out; |
89f2e218 | 619 | } |
58401572 | 620 | |
01f34848 | 621 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
622 | IPCTNL_MSG_CT_GET_CTRZERO) { |
623 | struct nf_conn_counter *acct; | |
624 | ||
625 | acct = nf_conn_acct_find(ct); | |
626 | if (acct) | |
627 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
628 | } | |
ea781f19 ED |
629 | releasect: |
630 | nf_ct_put(ct); | |
89f2e218 | 631 | } |
d205dc40 | 632 | if (cb->args[1]) { |
89f2e218 PM |
633 | cb->args[1] = 0; |
634 | goto restart; | |
c1d10adb PNA |
635 | } |
636 | } | |
89f2e218 | 637 | out: |
76507f69 | 638 | rcu_read_unlock(); |
d205dc40 PM |
639 | if (last) |
640 | nf_ct_put(last); | |
c1d10adb | 641 | |
c1d10adb PNA |
642 | return skb->len; |
643 | } | |
644 | ||
c1d10adb | 645 | static inline int |
df6fb868 | 646 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 647 | { |
df6fb868 | 648 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
649 | struct nf_conntrack_l3proto *l3proto; |
650 | int ret = 0; | |
651 | ||
df6fb868 | 652 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 653 | |
cd91566e FW |
654 | rcu_read_lock(); |
655 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 656 | |
f73e924c PM |
657 | if (likely(l3proto->nlattr_to_tuple)) { |
658 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
659 | l3proto->nla_policy); | |
660 | if (ret == 0) | |
661 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
662 | } | |
c1d10adb | 663 | |
cd91566e | 664 | rcu_read_unlock(); |
c1d10adb | 665 | |
c1d10adb PNA |
666 | return ret; |
667 | } | |
668 | ||
f73e924c PM |
669 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
670 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
671 | }; |
672 | ||
673 | static inline int | |
df6fb868 | 674 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
675 | struct nf_conntrack_tuple *tuple) |
676 | { | |
df6fb868 | 677 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 678 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
679 | int ret = 0; |
680 | ||
f73e924c PM |
681 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
682 | if (ret < 0) | |
683 | return ret; | |
c1d10adb | 684 | |
df6fb868 | 685 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 686 | return -EINVAL; |
77236b6e | 687 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 688 | |
cd91566e FW |
689 | rcu_read_lock(); |
690 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 691 | |
f73e924c PM |
692 | if (likely(l4proto->nlattr_to_tuple)) { |
693 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
694 | l4proto->nla_policy); | |
695 | if (ret == 0) | |
696 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
697 | } | |
c1d10adb | 698 | |
cd91566e | 699 | rcu_read_unlock(); |
601e68e1 | 700 | |
c1d10adb PNA |
701 | return ret; |
702 | } | |
703 | ||
bb5cf80e | 704 | static int |
df6fb868 | 705 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
706 | enum ctattr_tuple type, u_int8_t l3num) |
707 | { | |
df6fb868 | 708 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
709 | int err; |
710 | ||
c1d10adb PNA |
711 | memset(tuple, 0, sizeof(*tuple)); |
712 | ||
df6fb868 | 713 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 714 | |
df6fb868 | 715 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
716 | return -EINVAL; |
717 | ||
718 | tuple->src.l3num = l3num; | |
719 | ||
df6fb868 | 720 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
721 | if (err < 0) |
722 | return err; | |
723 | ||
df6fb868 | 724 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
725 | return -EINVAL; |
726 | ||
df6fb868 | 727 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
728 | if (err < 0) |
729 | return err; | |
730 | ||
731 | /* orig and expect tuples get DIR_ORIGINAL */ | |
732 | if (type == CTA_TUPLE_REPLY) | |
733 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
734 | else | |
735 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
736 | ||
c1d10adb PNA |
737 | return 0; |
738 | } | |
739 | ||
c1d10adb | 740 | static inline int |
df6fb868 | 741 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 742 | { |
df6fb868 | 743 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 744 | |
df6fb868 | 745 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 746 | |
df6fb868 | 747 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
748 | return -EINVAL; |
749 | ||
df6fb868 | 750 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
751 | |
752 | return 0; | |
753 | } | |
754 | ||
f73e924c PM |
755 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
756 | [CTA_STATUS] = { .type = NLA_U32 }, | |
757 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
758 | [CTA_MARK] = { .type = NLA_U32 }, | |
759 | [CTA_USE] = { .type = NLA_U32 }, | |
760 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
761 | }; |
762 | ||
763 | static int | |
601e68e1 | 764 | ctnetlink_del_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; | |
96bcf938 | 770 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
771 | u_int8_t u3 = nfmsg->nfgen_family; |
772 | int err = 0; | |
773 | ||
df6fb868 | 774 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 775 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 776 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
777 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
778 | else { | |
779 | /* Flush the whole table */ | |
274d383b PNA |
780 | nf_conntrack_flush_report(&init_net, |
781 | NETLINK_CB(skb).pid, | |
782 | nlmsg_report(nlh)); | |
c1d10adb PNA |
783 | return 0; |
784 | } | |
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; |
c1d10adb PNA |
792 | |
793 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 794 | |
df6fb868 | 795 | if (cda[CTA_ID]) { |
77236b6e | 796 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 797 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
798 | nf_ct_put(ct); |
799 | return -ENOENT; | |
800 | } | |
601e68e1 | 801 | } |
c1d10adb | 802 | |
19abb7b0 PNA |
803 | nf_conntrack_event_report(IPCT_DESTROY, |
804 | ct, | |
805 | NETLINK_CB(skb).pid, | |
806 | nlmsg_report(nlh)); | |
807 | ||
808 | /* death_by_timeout would report the event again */ | |
809 | set_bit(IPS_DYING_BIT, &ct->status); | |
810 | ||
51091764 | 811 | nf_ct_kill(ct); |
c1d10adb | 812 | nf_ct_put(ct); |
c1d10adb PNA |
813 | |
814 | return 0; | |
815 | } | |
816 | ||
817 | static int | |
601e68e1 | 818 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 819 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
820 | { |
821 | struct nf_conntrack_tuple_hash *h; | |
822 | struct nf_conntrack_tuple tuple; | |
823 | struct nf_conn *ct; | |
824 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 825 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
826 | u_int8_t u3 = nfmsg->nfgen_family; |
827 | int err = 0; | |
828 | ||
58401572 | 829 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
830 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
831 | ctnetlink_done); | |
c1d10adb | 832 | |
df6fb868 | 833 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 834 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 835 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
836 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
837 | else | |
838 | return -EINVAL; | |
839 | ||
840 | if (err < 0) | |
841 | return err; | |
842 | ||
400dad39 | 843 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 844 | if (!h) |
c1d10adb | 845 | return -ENOENT; |
9ea8cfd6 | 846 | |
c1d10adb PNA |
847 | ct = nf_ct_tuplehash_to_ctrack(h); |
848 | ||
849 | err = -ENOMEM; | |
96bcf938 PNA |
850 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
851 | if (skb2 == NULL) { | |
c1d10adb PNA |
852 | nf_ct_put(ct); |
853 | return -ENOMEM; | |
854 | } | |
c1d10adb | 855 | |
528a3a6f | 856 | rcu_read_lock(); |
601e68e1 | 857 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
8b0a231d | 858 | IPCTNL_MSG_CT_NEW, ct); |
528a3a6f | 859 | rcu_read_unlock(); |
c1d10adb PNA |
860 | nf_ct_put(ct); |
861 | if (err <= 0) | |
862 | goto free; | |
863 | ||
864 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
865 | if (err < 0) | |
866 | goto out; | |
867 | ||
c1d10adb PNA |
868 | return 0; |
869 | ||
870 | free: | |
871 | kfree_skb(skb2); | |
872 | out: | |
873 | return err; | |
874 | } | |
875 | ||
67671841 | 876 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
877 | static int |
878 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
879 | enum nf_nat_manip_type manip, | |
880 | struct nlattr *attr) | |
881 | { | |
882 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
883 | ||
884 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
885 | if (!parse_nat_setup) { | |
95a5afca | 886 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 887 | rcu_read_unlock(); |
748085fc | 888 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
889 | nfnl_unlock(); |
890 | if (request_module("nf-nat-ipv4") < 0) { | |
891 | nfnl_lock(); | |
748085fc | 892 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
893 | rcu_read_lock(); |
894 | return -EOPNOTSUPP; | |
895 | } | |
896 | nfnl_lock(); | |
748085fc | 897 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
898 | rcu_read_lock(); |
899 | if (nfnetlink_parse_nat_setup_hook) | |
900 | return -EAGAIN; | |
901 | #endif | |
902 | return -EOPNOTSUPP; | |
903 | } | |
904 | ||
905 | return parse_nat_setup(ct, manip, attr); | |
906 | } | |
67671841 | 907 | #endif |
e6a7d3c0 | 908 | |
bb5cf80e | 909 | static int |
df6fb868 | 910 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
911 | { |
912 | unsigned long d; | |
77236b6e | 913 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
914 | d = ct->status ^ status; |
915 | ||
916 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
917 | /* unchangeable */ | |
0adf9d67 | 918 | return -EBUSY; |
601e68e1 | 919 | |
c1d10adb PNA |
920 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
921 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 922 | return -EBUSY; |
601e68e1 | 923 | |
c1d10adb PNA |
924 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
925 | /* ASSURED bit can only be set */ | |
0adf9d67 | 926 | return -EBUSY; |
c1d10adb | 927 | |
c1d10adb PNA |
928 | /* Be careful here, modifying NAT bits can screw up things, |
929 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 930 | * nf_nat_range. */ |
c1d10adb PNA |
931 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
932 | return 0; | |
933 | } | |
934 | ||
e6a7d3c0 PNA |
935 | static int |
936 | ctnetlink_change_nat(struct nf_conn *ct, struct nlattr *cda[]) | |
937 | { | |
938 | #ifdef CONFIG_NF_NAT_NEEDED | |
939 | int ret; | |
940 | ||
941 | if (cda[CTA_NAT_DST]) { | |
942 | ret = ctnetlink_parse_nat_setup(ct, | |
943 | IP_NAT_MANIP_DST, | |
944 | cda[CTA_NAT_DST]); | |
945 | if (ret < 0) | |
946 | return ret; | |
947 | } | |
948 | if (cda[CTA_NAT_SRC]) { | |
949 | ret = ctnetlink_parse_nat_setup(ct, | |
950 | IP_NAT_MANIP_SRC, | |
951 | cda[CTA_NAT_SRC]); | |
952 | if (ret < 0) | |
953 | return ret; | |
954 | } | |
955 | return 0; | |
956 | #else | |
957 | return -EOPNOTSUPP; | |
958 | #endif | |
959 | } | |
c1d10adb PNA |
960 | |
961 | static inline int | |
df6fb868 | 962 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
963 | { |
964 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 965 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 966 | char *helpname = NULL; |
c1d10adb PNA |
967 | int err; |
968 | ||
c1d10adb PNA |
969 | /* don't change helper of sibling connections */ |
970 | if (ct->master) | |
0adf9d67 | 971 | return -EBUSY; |
c1d10adb | 972 | |
df6fb868 | 973 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
974 | if (err < 0) |
975 | return err; | |
976 | ||
df293bbb YK |
977 | if (!strcmp(helpname, "")) { |
978 | if (help && help->helper) { | |
c1d10adb PNA |
979 | /* we had a helper before ... */ |
980 | nf_ct_remove_expectations(ct); | |
3c158f7f | 981 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 982 | } |
df293bbb YK |
983 | |
984 | return 0; | |
c1d10adb | 985 | } |
601e68e1 | 986 | |
df293bbb | 987 | helper = __nf_conntrack_helper_find_byname(helpname); |
226c0c0e PNA |
988 | if (helper == NULL) { |
989 | #ifdef CONFIG_MODULES | |
990 | spin_unlock_bh(&nf_conntrack_lock); | |
991 | ||
992 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
993 | spin_lock_bh(&nf_conntrack_lock); | |
994 | return -EOPNOTSUPP; | |
995 | } | |
996 | ||
997 | spin_lock_bh(&nf_conntrack_lock); | |
998 | helper = __nf_conntrack_helper_find_byname(helpname); | |
999 | if (helper) | |
1000 | return -EAGAIN; | |
1001 | #endif | |
0adf9d67 | 1002 | return -EOPNOTSUPP; |
226c0c0e | 1003 | } |
df293bbb | 1004 | |
ceceae1b YK |
1005 | if (help) { |
1006 | if (help->helper == helper) | |
1007 | return 0; | |
1008 | if (help->helper) | |
1009 | return -EBUSY; | |
1010 | /* need to zero data of old helper */ | |
1011 | memset(&help->help, 0, sizeof(help->help)); | |
1012 | } else { | |
fab00c5d | 1013 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
ceceae1b YK |
1014 | if (help == NULL) |
1015 | return -ENOMEM; | |
1016 | } | |
df293bbb | 1017 | |
3c158f7f | 1018 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
1019 | |
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | static inline int | |
df6fb868 | 1024 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1025 | { |
77236b6e | 1026 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1027 | |
c1d10adb PNA |
1028 | if (!del_timer(&ct->timeout)) |
1029 | return -ETIME; | |
1030 | ||
1031 | ct->timeout.expires = jiffies + timeout * HZ; | |
1032 | add_timer(&ct->timeout); | |
1033 | ||
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | static inline int | |
df6fb868 | 1038 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1039 | { |
df6fb868 | 1040 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 1041 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1042 | int err = 0; |
1043 | ||
df6fb868 | 1044 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 1045 | |
cd91566e FW |
1046 | rcu_read_lock(); |
1047 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1048 | if (l4proto->from_nlattr) |
1049 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1050 | rcu_read_unlock(); |
c1d10adb PNA |
1051 | |
1052 | return err; | |
1053 | } | |
1054 | ||
13eae15a PNA |
1055 | #ifdef CONFIG_NF_NAT_NEEDED |
1056 | static inline int | |
1057 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1058 | { | |
1059 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1060 | ||
1061 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1062 | ||
1063 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1064 | return -EINVAL; | |
1065 | ||
1066 | natseq->correction_pos = | |
77236b6e | 1067 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1068 | |
1069 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1070 | return -EINVAL; | |
1071 | ||
1072 | natseq->offset_before = | |
77236b6e | 1073 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1074 | |
1075 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1076 | return -EINVAL; | |
1077 | ||
1078 | natseq->offset_after = | |
77236b6e | 1079 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1080 | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | static int | |
1085 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1086 | { | |
1087 | int ret = 0; | |
1088 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1089 | ||
1090 | if (!nat) | |
1091 | return 0; | |
1092 | ||
1093 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1094 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1095 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1096 | if (ret < 0) | |
1097 | return ret; | |
1098 | ||
1099 | ct->status |= IPS_SEQ_ADJUST; | |
1100 | } | |
1101 | ||
1102 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1103 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1104 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1105 | if (ret < 0) | |
1106 | return ret; | |
1107 | ||
1108 | ct->status |= IPS_SEQ_ADJUST; | |
1109 | } | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | #endif | |
1114 | ||
c1d10adb | 1115 | static int |
df6fb868 | 1116 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1117 | { |
1118 | int err; | |
1119 | ||
e098360f PNA |
1120 | /* only allow NAT changes and master assignation for new conntracks */ |
1121 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1122 | return -EOPNOTSUPP; | |
1123 | ||
df6fb868 | 1124 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1125 | err = ctnetlink_change_helper(ct, cda); |
1126 | if (err < 0) | |
1127 | return err; | |
1128 | } | |
1129 | ||
df6fb868 | 1130 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1131 | err = ctnetlink_change_timeout(ct, cda); |
1132 | if (err < 0) | |
1133 | return err; | |
1134 | } | |
1135 | ||
df6fb868 | 1136 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1137 | err = ctnetlink_change_status(ct, cda); |
1138 | if (err < 0) | |
1139 | return err; | |
1140 | } | |
1141 | ||
df6fb868 | 1142 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1143 | err = ctnetlink_change_protoinfo(ct, cda); |
1144 | if (err < 0) | |
1145 | return err; | |
1146 | } | |
1147 | ||
bcd1e830 | 1148 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1149 | if (cda[CTA_MARK]) |
77236b6e | 1150 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1151 | #endif |
1152 | ||
13eae15a PNA |
1153 | #ifdef CONFIG_NF_NAT_NEEDED |
1154 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1155 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1156 | if (err < 0) | |
1157 | return err; | |
1158 | } | |
1159 | #endif | |
1160 | ||
c1d10adb PNA |
1161 | return 0; |
1162 | } | |
1163 | ||
f0a3c086 | 1164 | static struct nf_conn * |
df6fb868 | 1165 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1166 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1167 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1168 | u8 u3) |
c1d10adb PNA |
1169 | { |
1170 | struct nf_conn *ct; | |
1171 | int err = -EINVAL; | |
ceceae1b | 1172 | struct nf_conntrack_helper *helper; |
c1d10adb | 1173 | |
b54ad409 | 1174 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1175 | if (IS_ERR(ct)) |
f0a3c086 | 1176 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1177 | |
df6fb868 | 1178 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1179 | goto err1; |
77236b6e | 1180 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1181 | |
1182 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1183 | ct->status |= IPS_CONFIRMED; | |
1184 | ||
1575e7ea | 1185 | rcu_read_lock(); |
226c0c0e | 1186 | if (cda[CTA_HELP]) { |
29fe1b48 | 1187 | char *helpname = NULL; |
226c0c0e PNA |
1188 | |
1189 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1190 | if (err < 0) |
1191 | goto err2; | |
226c0c0e PNA |
1192 | |
1193 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1194 | if (helper == NULL) { | |
1195 | rcu_read_unlock(); | |
1196 | #ifdef CONFIG_MODULES | |
1197 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1198 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1199 | goto err1; |
226c0c0e PNA |
1200 | } |
1201 | ||
1202 | rcu_read_lock(); | |
1203 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1204 | if (helper) { | |
226c0c0e | 1205 | err = -EAGAIN; |
0f5b3e85 | 1206 | goto err2; |
226c0c0e PNA |
1207 | } |
1208 | rcu_read_unlock(); | |
1209 | #endif | |
1210 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1211 | goto err1; |
226c0c0e PNA |
1212 | } else { |
1213 | struct nf_conn_help *help; | |
1214 | ||
1215 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1216 | if (help == NULL) { | |
226c0c0e | 1217 | err = -ENOMEM; |
0f5b3e85 | 1218 | goto err2; |
226c0c0e PNA |
1219 | } |
1220 | ||
1221 | /* not in hash table yet so not strictly necessary */ | |
1222 | rcu_assign_pointer(help->helper, helper); | |
1223 | } | |
1224 | } else { | |
1225 | /* try an implicit helper assignation */ | |
1226 | err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); | |
0f5b3e85 PM |
1227 | if (err < 0) |
1228 | goto err2; | |
1575e7ea PNA |
1229 | } |
1230 | ||
df6fb868 | 1231 | if (cda[CTA_STATUS]) { |
bbb3357d | 1232 | err = ctnetlink_change_status(ct, cda); |
0f5b3e85 PM |
1233 | if (err < 0) |
1234 | goto err2; | |
e6a7d3c0 PNA |
1235 | } |
1236 | ||
1237 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { | |
1238 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1239 | if (err < 0) |
1240 | goto err2; | |
bbb3357d | 1241 | } |
c1d10adb | 1242 | |
c969aa7d PNA |
1243 | #ifdef CONFIG_NF_NAT_NEEDED |
1244 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1245 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1246 | if (err < 0) |
1247 | goto err2; | |
c969aa7d PNA |
1248 | } |
1249 | #endif | |
1250 | ||
df6fb868 | 1251 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1252 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1253 | if (err < 0) |
1254 | goto err2; | |
c1d10adb PNA |
1255 | } |
1256 | ||
3ec19255 | 1257 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
58401572 | 1258 | |
bcd1e830 | 1259 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1260 | if (cda[CTA_MARK]) |
77236b6e | 1261 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1262 | #endif |
1263 | ||
5faa1f4c | 1264 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1265 | if (cda[CTA_TUPLE_MASTER]) { |
1266 | struct nf_conntrack_tuple master; | |
1267 | struct nf_conntrack_tuple_hash *master_h; | |
1268 | struct nf_conn *master_ct; | |
1269 | ||
1270 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1271 | if (err < 0) | |
0f5b3e85 | 1272 | goto err2; |
7ec47496 | 1273 | |
ea781f19 | 1274 | master_h = nf_conntrack_find_get(&init_net, &master); |
7ec47496 PNA |
1275 | if (master_h == NULL) { |
1276 | err = -ENOENT; | |
0f5b3e85 | 1277 | goto err2; |
7ec47496 PNA |
1278 | } |
1279 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1280 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1281 | ct->master = master_ct; |
f2a89004 | 1282 | } |
5faa1f4c | 1283 | |
c1d10adb PNA |
1284 | add_timer(&ct->timeout); |
1285 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1286 | rcu_read_unlock(); |
dafc741c | 1287 | |
f0a3c086 | 1288 | return ct; |
c1d10adb | 1289 | |
0f5b3e85 PM |
1290 | err2: |
1291 | rcu_read_unlock(); | |
1292 | err1: | |
c1d10adb | 1293 | nf_conntrack_free(ct); |
f0a3c086 | 1294 | return ERR_PTR(err); |
c1d10adb PNA |
1295 | } |
1296 | ||
601e68e1 YH |
1297 | static int |
1298 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1299 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1300 | { |
1301 | struct nf_conntrack_tuple otuple, rtuple; | |
1302 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1303 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1304 | u_int8_t u3 = nfmsg->nfgen_family; |
1305 | int err = 0; | |
1306 | ||
df6fb868 | 1307 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1308 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1309 | if (err < 0) | |
1310 | return err; | |
1311 | } | |
1312 | ||
df6fb868 | 1313 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1314 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1315 | if (err < 0) | |
1316 | return err; | |
1317 | } | |
1318 | ||
f8ba1aff | 1319 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1320 | if (cda[CTA_TUPLE_ORIG]) |
400dad39 | 1321 | h = __nf_conntrack_find(&init_net, &otuple); |
df6fb868 | 1322 | else if (cda[CTA_TUPLE_REPLY]) |
400dad39 | 1323 | h = __nf_conntrack_find(&init_net, &rtuple); |
c1d10adb PNA |
1324 | |
1325 | if (h == NULL) { | |
c1d10adb | 1326 | err = -ENOENT; |
f0a3c086 PNA |
1327 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1328 | struct nf_conn *ct; | |
fecc1133 | 1329 | enum ip_conntrack_events events; |
5faa1f4c | 1330 | |
f0a3c086 PNA |
1331 | ct = ctnetlink_create_conntrack(cda, &otuple, |
1332 | &rtuple, u3); | |
1333 | if (IS_ERR(ct)) { | |
1334 | err = PTR_ERR(ct); | |
5faa1f4c PNA |
1335 | goto out_unlock; |
1336 | } | |
f0a3c086 PNA |
1337 | err = 0; |
1338 | nf_conntrack_get(&ct->ct_general); | |
1339 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1340 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1341 | events = IPCT_RELATED; | |
1342 | else | |
1343 | events = IPCT_NEW; | |
1344 | ||
1345 | nf_conntrack_event_report(IPCT_STATUS | | |
1346 | IPCT_HELPER | | |
1347 | IPCT_PROTOINFO | | |
1348 | IPCT_NATSEQADJ | | |
1349 | IPCT_MARK | events, | |
1350 | ct, NETLINK_CB(skb).pid, | |
1351 | nlmsg_report(nlh)); | |
f0a3c086 PNA |
1352 | nf_ct_put(ct); |
1353 | } else | |
1354 | spin_unlock_bh(&nf_conntrack_lock); | |
5faa1f4c | 1355 | |
c1d10adb PNA |
1356 | return err; |
1357 | } | |
1358 | /* implicit 'else' */ | |
1359 | ||
c1d10adb PNA |
1360 | /* We manipulate the conntrack inside the global conntrack table lock, |
1361 | * so there's no need to increase the refcount */ | |
c1d10adb | 1362 | err = -EEXIST; |
ff4ca827 | 1363 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1364 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1365 | ||
19abb7b0 PNA |
1366 | err = ctnetlink_change_conntrack(ct, cda); |
1367 | if (err == 0) { | |
1368 | nf_conntrack_get(&ct->ct_general); | |
1369 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1370 | nf_conntrack_event_report(IPCT_STATUS | |
1371 | IPCT_HELPER | | |
1372 | IPCT_PROTOINFO | | |
1373 | IPCT_NATSEQADJ | | |
1374 | IPCT_MARK, | |
1375 | ct, NETLINK_CB(skb).pid, | |
1376 | nlmsg_report(nlh)); | |
19abb7b0 PNA |
1377 | nf_ct_put(ct); |
1378 | } else | |
1379 | spin_unlock_bh(&nf_conntrack_lock); | |
1380 | ||
1381 | return err; | |
ff4ca827 | 1382 | } |
c1d10adb PNA |
1383 | |
1384 | out_unlock: | |
f8ba1aff | 1385 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1386 | return err; |
1387 | } | |
1388 | ||
601e68e1 YH |
1389 | /*********************************************************************** |
1390 | * EXPECT | |
1391 | ***********************************************************************/ | |
c1d10adb PNA |
1392 | |
1393 | static inline int | |
1394 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1395 | const struct nf_conntrack_tuple *tuple, | |
1396 | enum ctattr_expect type) | |
1397 | { | |
df6fb868 | 1398 | struct nlattr *nest_parms; |
601e68e1 | 1399 | |
df6fb868 PM |
1400 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1401 | if (!nest_parms) | |
1402 | goto nla_put_failure; | |
c1d10adb | 1403 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1404 | goto nla_put_failure; |
1405 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1406 | |
1407 | return 0; | |
1408 | ||
df6fb868 | 1409 | nla_put_failure: |
c1d10adb | 1410 | return -1; |
601e68e1 | 1411 | } |
c1d10adb | 1412 | |
1cde6436 PNA |
1413 | static inline int |
1414 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1415 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1416 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1417 | { |
1418 | int ret; | |
1419 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1420 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1421 | struct nf_conntrack_tuple m; |
df6fb868 | 1422 | struct nlattr *nest_parms; |
d4156e8c PM |
1423 | |
1424 | memset(&m, 0xFF, sizeof(m)); | |
1425 | m.src.u.all = mask->src.u.all; | |
1426 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1427 | ||
df6fb868 PM |
1428 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1429 | if (!nest_parms) | |
1430 | goto nla_put_failure; | |
1cde6436 | 1431 | |
528a3a6f | 1432 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1433 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1434 | |
1435 | if (unlikely(ret < 0)) | |
df6fb868 | 1436 | goto nla_put_failure; |
1cde6436 | 1437 | |
528a3a6f | 1438 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1439 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1440 | if (unlikely(ret < 0)) |
df6fb868 | 1441 | goto nla_put_failure; |
1cde6436 | 1442 | |
df6fb868 | 1443 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1444 | |
1445 | return 0; | |
1446 | ||
df6fb868 | 1447 | nla_put_failure: |
1cde6436 PNA |
1448 | return -1; |
1449 | } | |
1450 | ||
bb5cf80e | 1451 | static int |
c1d10adb | 1452 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1453 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1454 | { |
1455 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1456 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1457 | ||
1458 | if (timeout < 0) | |
1459 | timeout = 0; | |
c1d10adb PNA |
1460 | |
1461 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1462 | goto nla_put_failure; |
1cde6436 | 1463 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1464 | goto nla_put_failure; |
c1d10adb PNA |
1465 | if (ctnetlink_exp_dump_tuple(skb, |
1466 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1467 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1468 | goto nla_put_failure; |
601e68e1 | 1469 | |
d978e5da | 1470 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1471 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1472 | |
1473 | return 0; | |
601e68e1 | 1474 | |
df6fb868 | 1475 | nla_put_failure: |
c1d10adb PNA |
1476 | return -1; |
1477 | } | |
1478 | ||
1479 | static int | |
1480 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 1481 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1482 | { |
1483 | struct nlmsghdr *nlh; | |
1484 | struct nfgenmsg *nfmsg; | |
96bcf938 | 1485 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
1486 | |
1487 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
96bcf938 PNA |
1488 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
1489 | if (nlh == NULL) | |
1490 | goto nlmsg_failure; | |
c1d10adb | 1491 | |
96bcf938 | 1492 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1493 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1494 | nfmsg->version = NFNETLINK_V0; | |
1495 | nfmsg->res_id = 0; | |
1496 | ||
1497 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1498 | goto nla_put_failure; |
c1d10adb | 1499 | |
96bcf938 | 1500 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
1501 | return skb->len; |
1502 | ||
1503 | nlmsg_failure: | |
df6fb868 | 1504 | nla_put_failure: |
96bcf938 | 1505 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
1506 | return -1; |
1507 | } | |
1508 | ||
1509 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1510 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1511 | unsigned long events, void *ptr) | |
1512 | { | |
1513 | struct nlmsghdr *nlh; | |
1514 | struct nfgenmsg *nfmsg; | |
19abb7b0 PNA |
1515 | struct nf_exp_event *item = (struct nf_exp_event *)ptr; |
1516 | struct nf_conntrack_expect *exp = item->exp; | |
c1d10adb PNA |
1517 | struct sk_buff *skb; |
1518 | unsigned int type; | |
c1d10adb PNA |
1519 | int flags = 0; |
1520 | ||
1521 | if (events & IPEXP_NEW) { | |
1522 | type = IPCTNL_MSG_EXP_NEW; | |
1523 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1524 | } else | |
1525 | return NOTIFY_DONE; | |
1526 | ||
1f9da256 PNA |
1527 | if (!item->report && |
1528 | !nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) | |
b3a27bfb PNA |
1529 | return NOTIFY_DONE; |
1530 | ||
96bcf938 PNA |
1531 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1532 | if (skb == NULL) | |
150ace0d | 1533 | goto errout; |
c1d10adb | 1534 | |
b633ad5f | 1535 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
96bcf938 PNA |
1536 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
1537 | if (nlh == NULL) | |
1538 | goto nlmsg_failure; | |
c1d10adb | 1539 | |
96bcf938 | 1540 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1541 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1542 | nfmsg->version = NFNETLINK_V0; | |
1543 | nfmsg->res_id = 0; | |
1544 | ||
528a3a6f | 1545 | rcu_read_lock(); |
c1d10adb | 1546 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1547 | goto nla_put_failure; |
528a3a6f | 1548 | rcu_read_unlock(); |
c1d10adb | 1549 | |
96bcf938 | 1550 | nlmsg_end(skb, nlh); |
19abb7b0 | 1551 | nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report); |
c1d10adb PNA |
1552 | return NOTIFY_DONE; |
1553 | ||
df6fb868 | 1554 | nla_put_failure: |
528a3a6f | 1555 | rcu_read_unlock(); |
96bcf938 | 1556 | nlmsg_cancel(skb, nlh); |
528a3a6f | 1557 | nlmsg_failure: |
c1d10adb | 1558 | kfree_skb(skb); |
150ace0d PNA |
1559 | errout: |
1560 | nfnetlink_set_err(0, 0, -ENOBUFS); | |
c1d10adb PNA |
1561 | return NOTIFY_DONE; |
1562 | } | |
1563 | #endif | |
cf6994c2 PM |
1564 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1565 | { | |
31f15875 PM |
1566 | if (cb->args[1]) |
1567 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1568 | return 0; |
1569 | } | |
c1d10adb PNA |
1570 | |
1571 | static int | |
1572 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1573 | { | |
9b03f38d | 1574 | struct net *net = &init_net; |
cf6994c2 | 1575 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 1576 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
31f15875 | 1577 | struct hlist_node *n; |
87711cb8 | 1578 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1579 | |
7d0742da | 1580 | rcu_read_lock(); |
31f15875 PM |
1581 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1582 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1583 | restart: |
9b03f38d | 1584 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1585 | hnode) { |
1586 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1587 | continue; |
31f15875 PM |
1588 | if (cb->args[1]) { |
1589 | if (exp != last) | |
1590 | continue; | |
1591 | cb->args[1] = 0; | |
1592 | } | |
8b0a231d PNA |
1593 | if (ctnetlink_exp_fill_info(skb, |
1594 | NETLINK_CB(cb->skb).pid, | |
31f15875 PM |
1595 | cb->nlh->nlmsg_seq, |
1596 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 1597 | exp) < 0) { |
7d0742da PM |
1598 | if (!atomic_inc_not_zero(&exp->use)) |
1599 | continue; | |
31f15875 PM |
1600 | cb->args[1] = (unsigned long)exp; |
1601 | goto out; | |
1602 | } | |
cf6994c2 | 1603 | } |
31f15875 PM |
1604 | if (cb->args[1]) { |
1605 | cb->args[1] = 0; | |
1606 | goto restart; | |
cf6994c2 PM |
1607 | } |
1608 | } | |
601e68e1 | 1609 | out: |
7d0742da | 1610 | rcu_read_unlock(); |
cf6994c2 PM |
1611 | if (last) |
1612 | nf_ct_expect_put(last); | |
c1d10adb | 1613 | |
c1d10adb PNA |
1614 | return skb->len; |
1615 | } | |
1616 | ||
f73e924c PM |
1617 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1618 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1619 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1620 | }; |
1621 | ||
1622 | static int | |
601e68e1 | 1623 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1624 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1625 | { |
1626 | struct nf_conntrack_tuple tuple; | |
1627 | struct nf_conntrack_expect *exp; | |
1628 | struct sk_buff *skb2; | |
96bcf938 | 1629 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1630 | u_int8_t u3 = nfmsg->nfgen_family; |
1631 | int err = 0; | |
1632 | ||
c1d10adb | 1633 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1634 | return netlink_dump_start(ctnl, skb, nlh, |
1635 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1636 | ctnetlink_exp_done); |
c1d10adb PNA |
1637 | } |
1638 | ||
df6fb868 | 1639 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1640 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1641 | else | |
1642 | return -EINVAL; | |
1643 | ||
1644 | if (err < 0) | |
1645 | return err; | |
1646 | ||
9b03f38d | 1647 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1648 | if (!exp) |
1649 | return -ENOENT; | |
1650 | ||
df6fb868 | 1651 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1652 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1653 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1654 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1655 | return -ENOENT; |
1656 | } | |
601e68e1 | 1657 | } |
c1d10adb PNA |
1658 | |
1659 | err = -ENOMEM; | |
96bcf938 PNA |
1660 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1661 | if (skb2 == NULL) | |
c1d10adb | 1662 | goto out; |
4e9b8269 | 1663 | |
528a3a6f | 1664 | rcu_read_lock(); |
601e68e1 | 1665 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
8b0a231d | 1666 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 1667 | rcu_read_unlock(); |
c1d10adb PNA |
1668 | if (err <= 0) |
1669 | goto free; | |
1670 | ||
6823645d | 1671 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1672 | |
1673 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1674 | ||
1675 | free: | |
1676 | kfree_skb(skb2); | |
1677 | out: | |
6823645d | 1678 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1679 | return err; |
1680 | } | |
1681 | ||
1682 | static int | |
601e68e1 | 1683 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1684 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1685 | { |
31f15875 | 1686 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1687 | struct nf_conntrack_tuple tuple; |
1688 | struct nf_conntrack_helper *h; | |
96bcf938 | 1689 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
31f15875 | 1690 | struct hlist_node *n, *next; |
c1d10adb | 1691 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1692 | unsigned int i; |
c1d10adb PNA |
1693 | int err; |
1694 | ||
df6fb868 | 1695 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1696 | /* delete a single expect by tuple */ |
1697 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1698 | if (err < 0) | |
1699 | return err; | |
1700 | ||
1701 | /* bump usage count to 2 */ | |
9b03f38d | 1702 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1703 | if (!exp) |
1704 | return -ENOENT; | |
1705 | ||
df6fb868 | 1706 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1707 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1708 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1709 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1710 | return -ENOENT; |
1711 | } | |
1712 | } | |
1713 | ||
1714 | /* after list removal, usage count == 1 */ | |
6823645d | 1715 | nf_ct_unexpect_related(exp); |
601e68e1 | 1716 | /* have to put what we 'get' above. |
c1d10adb | 1717 | * after this line usage count == 0 */ |
6823645d | 1718 | nf_ct_expect_put(exp); |
df6fb868 PM |
1719 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1720 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1721 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1722 | |
1723 | /* delete all expectations for this helper */ | |
f8ba1aff | 1724 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1725 | h = __nf_conntrack_helper_find_byname(name); |
1726 | if (!h) { | |
f8ba1aff | 1727 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1728 | return -EOPNOTSUPP; |
c1d10adb | 1729 | } |
31f15875 PM |
1730 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1731 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1732 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1733 | hnode) { |
1734 | m_help = nfct_help(exp->master); | |
1735 | if (m_help->helper == h | |
1736 | && del_timer(&exp->timeout)) { | |
1737 | nf_ct_unlink_expect(exp); | |
1738 | nf_ct_expect_put(exp); | |
1739 | } | |
c1d10adb PNA |
1740 | } |
1741 | } | |
f8ba1aff | 1742 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1743 | } else { |
1744 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1745 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1746 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1747 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1748 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1749 | hnode) { |
1750 | if (del_timer(&exp->timeout)) { | |
1751 | nf_ct_unlink_expect(exp); | |
1752 | nf_ct_expect_put(exp); | |
1753 | } | |
c1d10adb PNA |
1754 | } |
1755 | } | |
f8ba1aff | 1756 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1757 | } |
1758 | ||
1759 | return 0; | |
1760 | } | |
1761 | static int | |
df6fb868 | 1762 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1763 | { |
1764 | return -EOPNOTSUPP; | |
1765 | } | |
1766 | ||
1767 | static int | |
19abb7b0 | 1768 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) |
c1d10adb PNA |
1769 | { |
1770 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1771 | struct nf_conntrack_tuple_hash *h = NULL; | |
1772 | struct nf_conntrack_expect *exp; | |
1773 | struct nf_conn *ct; | |
dc808fe2 | 1774 | struct nf_conn_help *help; |
c1d10adb PNA |
1775 | int err = 0; |
1776 | ||
c1d10adb PNA |
1777 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1778 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1779 | if (err < 0) | |
1780 | return err; | |
1781 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1782 | if (err < 0) | |
1783 | return err; | |
1784 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1785 | if (err < 0) | |
1786 | return err; | |
1787 | ||
1788 | /* Look for master conntrack of this expectation */ | |
400dad39 | 1789 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
c1d10adb PNA |
1790 | if (!h) |
1791 | return -ENOENT; | |
1792 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1793 | help = nfct_help(ct); |
c1d10adb | 1794 | |
dc808fe2 | 1795 | if (!help || !help->helper) { |
c1d10adb | 1796 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1797 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1798 | goto out; |
1799 | } | |
1800 | ||
6823645d | 1801 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1802 | if (!exp) { |
1803 | err = -ENOMEM; | |
1804 | goto out; | |
1805 | } | |
601e68e1 | 1806 | |
626ba8fb | 1807 | exp->class = 0; |
c1d10adb PNA |
1808 | exp->expectfn = NULL; |
1809 | exp->flags = 0; | |
1810 | exp->master = ct; | |
9457d851 | 1811 | exp->helper = NULL; |
c1d10adb | 1812 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1813 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1814 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1815 | |
19abb7b0 | 1816 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1817 | nf_ct_expect_put(exp); |
c1d10adb | 1818 | |
601e68e1 | 1819 | out: |
c1d10adb PNA |
1820 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1821 | return err; | |
1822 | } | |
1823 | ||
1824 | static int | |
1825 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1826 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1827 | { |
1828 | struct nf_conntrack_tuple tuple; | |
1829 | struct nf_conntrack_expect *exp; | |
96bcf938 | 1830 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1831 | u_int8_t u3 = nfmsg->nfgen_family; |
1832 | int err = 0; | |
1833 | ||
df6fb868 PM |
1834 | if (!cda[CTA_EXPECT_TUPLE] |
1835 | || !cda[CTA_EXPECT_MASK] | |
1836 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1837 | return -EINVAL; |
1838 | ||
1839 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1840 | if (err < 0) | |
1841 | return err; | |
1842 | ||
f8ba1aff | 1843 | spin_lock_bh(&nf_conntrack_lock); |
9b03f38d | 1844 | exp = __nf_ct_expect_find(&init_net, &tuple); |
c1d10adb PNA |
1845 | |
1846 | if (!exp) { | |
f8ba1aff | 1847 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1848 | err = -ENOENT; |
19abb7b0 PNA |
1849 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1850 | err = ctnetlink_create_expect(cda, | |
1851 | u3, | |
1852 | NETLINK_CB(skb).pid, | |
1853 | nlmsg_report(nlh)); | |
1854 | } | |
c1d10adb PNA |
1855 | return err; |
1856 | } | |
1857 | ||
1858 | err = -EEXIST; | |
1859 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1860 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1861 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1862 | |
c1d10adb PNA |
1863 | return err; |
1864 | } | |
1865 | ||
1866 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1867 | static struct notifier_block ctnl_notifier = { | |
1868 | .notifier_call = ctnetlink_conntrack_event, | |
1869 | }; | |
1870 | ||
1871 | static struct notifier_block ctnl_notifier_exp = { | |
1872 | .notifier_call = ctnetlink_expect_event, | |
1873 | }; | |
1874 | #endif | |
1875 | ||
7c8d4cb4 | 1876 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1877 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1878 | .attr_count = CTA_MAX, |
1879 | .policy = ct_nla_policy }, | |
c1d10adb | 1880 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1881 | .attr_count = CTA_MAX, |
1882 | .policy = ct_nla_policy }, | |
c1d10adb | 1883 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1884 | .attr_count = CTA_MAX, |
1885 | .policy = ct_nla_policy }, | |
c1d10adb | 1886 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1887 | .attr_count = CTA_MAX, |
1888 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1889 | }; |
1890 | ||
7c8d4cb4 | 1891 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1892 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1893 | .attr_count = CTA_EXPECT_MAX, |
1894 | .policy = exp_nla_policy }, | |
c1d10adb | 1895 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1896 | .attr_count = CTA_EXPECT_MAX, |
1897 | .policy = exp_nla_policy }, | |
c1d10adb | 1898 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1899 | .attr_count = CTA_EXPECT_MAX, |
1900 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1901 | }; |
1902 | ||
7c8d4cb4 | 1903 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1904 | .name = "conntrack", |
1905 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1906 | .cb_count = IPCTNL_MSG_MAX, | |
1907 | .cb = ctnl_cb, | |
1908 | }; | |
1909 | ||
7c8d4cb4 | 1910 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1911 | .name = "conntrack_expect", |
1912 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1913 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1914 | .cb = ctnl_exp_cb, | |
1915 | }; | |
1916 | ||
d2483dde | 1917 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1918 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1919 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1920 | |
1921 | static int __init ctnetlink_init(void) | |
1922 | { | |
1923 | int ret; | |
1924 | ||
1925 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1926 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1927 | if (ret < 0) { | |
1928 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1929 | goto err_out; | |
1930 | } | |
1931 | ||
1932 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1933 | if (ret < 0) { | |
1934 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1935 | goto err_unreg_subsys; | |
1936 | } | |
1937 | ||
1938 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1939 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1940 | if (ret < 0) { | |
1941 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1942 | goto err_unreg_exp_subsys; | |
1943 | } | |
1944 | ||
6823645d | 1945 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1946 | if (ret < 0) { |
1947 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1948 | goto err_unreg_notifier; | |
1949 | } | |
1950 | #endif | |
1951 | ||
1952 | return 0; | |
1953 | ||
1954 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1955 | err_unreg_notifier: | |
1956 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1957 | err_unreg_exp_subsys: | |
1958 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1959 | #endif | |
1960 | err_unreg_subsys: | |
1961 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1962 | err_out: | |
1963 | return ret; | |
1964 | } | |
1965 | ||
1966 | static void __exit ctnetlink_exit(void) | |
1967 | { | |
1968 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1969 | ||
1970 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1971 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1972 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1973 | #endif | |
1974 | ||
1975 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1976 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1977 | return; | |
1978 | } | |
1979 | ||
1980 | module_init(ctnetlink_init); | |
1981 | module_exit(ctnetlink_exit); |