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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> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
c1d10adb PNA |
31 | |
32 | #include <linux/netfilter.h> | |
dc5fc579 | 33 | #include <net/netlink.h> |
9592a5c0 | 34 | #include <net/sock.h> |
c1d10adb PNA |
35 | #include <net/netfilter/nf_conntrack.h> |
36 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 37 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
38 | #include <net/netfilter/nf_conntrack_helper.h> |
39 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 40 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 41 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 42 | #include <net/netfilter/nf_conntrack_acct.h> |
ef00f89f | 43 | #include <net/netfilter/nf_conntrack_zones.h> |
5b1158e9 JK |
44 | #ifdef CONFIG_NF_NAT_NEEDED |
45 | #include <net/netfilter/nf_nat_core.h> | |
46 | #include <net/netfilter/nf_nat_protocol.h> | |
47 | #endif | |
c1d10adb PNA |
48 | |
49 | #include <linux/netfilter/nfnetlink.h> | |
50 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
51 | ||
52 | MODULE_LICENSE("GPL"); | |
53 | ||
dc808fe2 | 54 | static char __initdata version[] = "0.93"; |
c1d10adb | 55 | |
c1d10adb | 56 | static inline int |
601e68e1 | 57 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 58 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 59 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 60 | { |
c1d10adb | 61 | int ret = 0; |
df6fb868 | 62 | struct nlattr *nest_parms; |
c1d10adb | 63 | |
df6fb868 PM |
64 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
65 | if (!nest_parms) | |
66 | goto nla_put_failure; | |
77236b6e | 67 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 68 | |
fdf70832 PM |
69 | if (likely(l4proto->tuple_to_nlattr)) |
70 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 71 | |
df6fb868 | 72 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
73 | |
74 | return ret; | |
75 | ||
df6fb868 | 76 | nla_put_failure: |
c1d10adb PNA |
77 | return -1; |
78 | } | |
79 | ||
80 | static inline int | |
1cde6436 PNA |
81 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
82 | const struct nf_conntrack_tuple *tuple, | |
83 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 84 | { |
c1d10adb | 85 | int ret = 0; |
df6fb868 PM |
86 | struct nlattr *nest_parms; |
87 | ||
88 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
89 | if (!nest_parms) | |
90 | goto nla_put_failure; | |
1cde6436 | 91 | |
fdf70832 PM |
92 | if (likely(l3proto->tuple_to_nlattr)) |
93 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 94 | |
df6fb868 | 95 | nla_nest_end(skb, nest_parms); |
c1d10adb | 96 | |
1cde6436 PNA |
97 | return ret; |
98 | ||
df6fb868 | 99 | nla_put_failure: |
1cde6436 PNA |
100 | return -1; |
101 | } | |
102 | ||
bb5cf80e | 103 | static int |
1cde6436 PNA |
104 | ctnetlink_dump_tuples(struct sk_buff *skb, |
105 | const struct nf_conntrack_tuple *tuple) | |
106 | { | |
107 | int ret; | |
108 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 109 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 110 | |
528a3a6f | 111 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 112 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
113 | |
114 | if (unlikely(ret < 0)) | |
115 | return ret; | |
116 | ||
528a3a6f | 117 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 118 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
119 | |
120 | return ret; | |
c1d10adb PNA |
121 | } |
122 | ||
123 | static inline int | |
124 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
125 | { | |
77236b6e | 126 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
127 | return 0; |
128 | ||
df6fb868 | 129 | nla_put_failure: |
c1d10adb PNA |
130 | return -1; |
131 | } | |
132 | ||
133 | static inline int | |
134 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
135 | { | |
77236b6e | 136 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 137 | |
77236b6e | 138 | if (timeout < 0) |
c1d10adb | 139 | timeout = 0; |
601e68e1 | 140 | |
77236b6e | 141 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
142 | return 0; |
143 | ||
df6fb868 | 144 | nla_put_failure: |
c1d10adb PNA |
145 | return -1; |
146 | } | |
147 | ||
148 | static inline int | |
440f0d58 | 149 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 150 | { |
5e8fbe2a | 151 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 152 | struct nlattr *nest_proto; |
c1d10adb PNA |
153 | int ret; |
154 | ||
528a3a6f PNA |
155 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
156 | if (!l4proto->to_nlattr) | |
c1d10adb | 157 | return 0; |
601e68e1 | 158 | |
df6fb868 PM |
159 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
160 | if (!nest_proto) | |
161 | goto nla_put_failure; | |
c1d10adb | 162 | |
fdf70832 | 163 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 164 | |
df6fb868 | 165 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
166 | |
167 | return ret; | |
168 | ||
df6fb868 | 169 | nla_put_failure: |
c1d10adb PNA |
170 | return -1; |
171 | } | |
172 | ||
173 | static inline int | |
174 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
175 | { | |
df6fb868 | 176 | struct nlattr *nest_helper; |
dc808fe2 | 177 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 178 | struct nf_conntrack_helper *helper; |
c1d10adb | 179 | |
3c158f7f | 180 | if (!help) |
c1d10adb | 181 | return 0; |
601e68e1 | 182 | |
3c158f7f PM |
183 | helper = rcu_dereference(help->helper); |
184 | if (!helper) | |
185 | goto out; | |
186 | ||
df6fb868 PM |
187 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
188 | if (!nest_helper) | |
189 | goto nla_put_failure; | |
77236b6e | 190 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 191 | |
fdf70832 PM |
192 | if (helper->to_nlattr) |
193 | helper->to_nlattr(skb, ct); | |
c1d10adb | 194 | |
df6fb868 | 195 | nla_nest_end(skb, nest_helper); |
3c158f7f | 196 | out: |
c1d10adb PNA |
197 | return 0; |
198 | ||
df6fb868 | 199 | nla_put_failure: |
c1d10adb PNA |
200 | return -1; |
201 | } | |
202 | ||
bb5cf80e | 203 | static int |
c1d10adb PNA |
204 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
205 | enum ip_conntrack_dir dir) | |
206 | { | |
207 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 208 | struct nlattr *nest_count; |
58401572 KPO |
209 | const struct nf_conn_counter *acct; |
210 | ||
211 | acct = nf_conn_acct_find(ct); | |
212 | if (!acct) | |
213 | return 0; | |
c1d10adb | 214 | |
df6fb868 PM |
215 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
216 | if (!nest_count) | |
217 | goto nla_put_failure; | |
218 | ||
58401572 KPO |
219 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
220 | cpu_to_be64(acct[dir].packets)); | |
221 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
222 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 223 | |
df6fb868 | 224 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
225 | |
226 | return 0; | |
227 | ||
df6fb868 | 228 | nla_put_failure: |
c1d10adb PNA |
229 | return -1; |
230 | } | |
c1d10adb PNA |
231 | |
232 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
233 | static inline int | |
234 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
235 | { | |
77236b6e | 236 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
237 | return 0; |
238 | ||
df6fb868 | 239 | nla_put_failure: |
c1d10adb PNA |
240 | return -1; |
241 | } | |
242 | #else | |
243 | #define ctnetlink_dump_mark(a, b) (0) | |
244 | #endif | |
245 | ||
37fccd85 PNA |
246 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
247 | static inline int | |
248 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
249 | { | |
77236b6e | 250 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
251 | return 0; |
252 | ||
253 | nla_put_failure: | |
254 | return -1; | |
255 | } | |
256 | #else | |
257 | #define ctnetlink_dump_secmark(a, b) (0) | |
258 | #endif | |
259 | ||
0f417ce9 PNA |
260 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
261 | ||
262 | static inline int | |
263 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
264 | { | |
265 | struct nlattr *nest_parms; | |
266 | ||
267 | if (!(ct->status & IPS_EXPECTED)) | |
268 | return 0; | |
269 | ||
270 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
271 | if (!nest_parms) | |
272 | goto nla_put_failure; | |
273 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
274 | goto nla_put_failure; | |
275 | nla_nest_end(skb, nest_parms); | |
276 | ||
277 | return 0; | |
278 | ||
279 | nla_put_failure: | |
280 | return -1; | |
281 | } | |
282 | ||
13eae15a | 283 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 284 | static int |
13eae15a PNA |
285 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
286 | { | |
13eae15a PNA |
287 | struct nlattr *nest_parms; |
288 | ||
289 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
290 | if (!nest_parms) | |
291 | goto nla_put_failure; | |
292 | ||
77236b6e PM |
293 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
294 | htonl(natseq->correction_pos)); | |
295 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
296 | htonl(natseq->offset_before)); | |
297 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
298 | htonl(natseq->offset_after)); | |
13eae15a PNA |
299 | |
300 | nla_nest_end(skb, nest_parms); | |
301 | ||
302 | return 0; | |
303 | ||
304 | nla_put_failure: | |
305 | return -1; | |
306 | } | |
307 | ||
308 | static inline int | |
309 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
310 | { | |
311 | struct nf_nat_seq *natseq; | |
312 | struct nf_conn_nat *nat = nfct_nat(ct); | |
313 | ||
314 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
315 | return 0; | |
316 | ||
317 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
318 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
319 | return -1; | |
320 | ||
321 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
322 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
323 | return -1; | |
324 | ||
325 | return 0; | |
326 | } | |
327 | #else | |
328 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
329 | #endif | |
330 | ||
c1d10adb PNA |
331 | static inline int |
332 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
333 | { | |
77236b6e | 334 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
335 | return 0; |
336 | ||
df6fb868 | 337 | nla_put_failure: |
c1d10adb PNA |
338 | return -1; |
339 | } | |
340 | ||
341 | static inline int | |
342 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
343 | { | |
77236b6e | 344 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
345 | return 0; |
346 | ||
df6fb868 | 347 | nla_put_failure: |
c1d10adb PNA |
348 | return -1; |
349 | } | |
350 | ||
c1d10adb PNA |
351 | static int |
352 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
440f0d58 | 353 | int event, struct nf_conn *ct) |
c1d10adb PNA |
354 | { |
355 | struct nlmsghdr *nlh; | |
356 | struct nfgenmsg *nfmsg; | |
df6fb868 | 357 | struct nlattr *nest_parms; |
96bcf938 | 358 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
359 | |
360 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
96bcf938 PNA |
361 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
362 | if (nlh == NULL) | |
363 | goto nlmsg_failure; | |
c1d10adb | 364 | |
96bcf938 | 365 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 366 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
367 | nfmsg->version = NFNETLINK_V0; |
368 | nfmsg->res_id = 0; | |
369 | ||
df6fb868 PM |
370 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
371 | if (!nest_parms) | |
372 | goto nla_put_failure; | |
f2f3e38c | 373 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
374 | goto nla_put_failure; |
375 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 376 | |
df6fb868 PM |
377 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
378 | if (!nest_parms) | |
379 | goto nla_put_failure; | |
f2f3e38c | 380 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
381 | goto nla_put_failure; |
382 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 383 | |
ef00f89f PM |
384 | if (nf_ct_zone(ct)) |
385 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); | |
386 | ||
c1d10adb PNA |
387 | if (ctnetlink_dump_status(skb, ct) < 0 || |
388 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
389 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
390 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
391 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
392 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
393 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 394 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 395 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 396 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 397 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 398 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 399 | goto nla_put_failure; |
c1d10adb | 400 | |
96bcf938 | 401 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
402 | return skb->len; |
403 | ||
404 | nlmsg_failure: | |
df6fb868 | 405 | nla_put_failure: |
96bcf938 | 406 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
407 | return -1; |
408 | } | |
409 | ||
410 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
03b64f51 PNA |
411 | static inline size_t |
412 | ctnetlink_proto_size(const struct nf_conn *ct) | |
2732c4e4 HE |
413 | { |
414 | struct nf_conntrack_l3proto *l3proto; | |
415 | struct nf_conntrack_l4proto *l4proto; | |
03b64f51 PNA |
416 | size_t len = 0; |
417 | ||
418 | rcu_read_lock(); | |
419 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); | |
420 | len += l3proto->nla_size; | |
421 | ||
422 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
423 | len += l4proto->nla_size; | |
424 | rcu_read_unlock(); | |
425 | ||
426 | return len; | |
427 | } | |
428 | ||
d26e6a02 JP |
429 | static inline size_t |
430 | ctnetlink_counters_size(const struct nf_conn *ct) | |
431 | { | |
432 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) | |
433 | return 0; | |
434 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ | |
435 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ | |
436 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
437 | ; | |
438 | } | |
439 | ||
03b64f51 PNA |
440 | static inline size_t |
441 | ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
442 | { | |
443 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
444 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
445 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
446 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
447 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
448 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
449 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
d26e6a02 | 450 | + ctnetlink_counters_size(ct) |
03b64f51 PNA |
451 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
452 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
453 | + nla_total_size(0) /* CTA_HELP */ | |
454 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
d271e8bd | 455 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
03b64f51 | 456 | + nla_total_size(sizeof(u_int32_t)) /* CTA_SECMARK */ |
d271e8bd HE |
457 | #endif |
458 | #ifdef CONFIG_NF_NAT_NEEDED | |
03b64f51 PNA |
459 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
460 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
461 | #endif |
462 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 463 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
d271e8bd | 464 | #endif |
03b64f51 PNA |
465 | + ctnetlink_proto_size(ct) |
466 | ; | |
2732c4e4 HE |
467 | } |
468 | ||
e34d5c1a PNA |
469 | static int |
470 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb | 471 | { |
9592a5c0 | 472 | struct net *net; |
c1d10adb PNA |
473 | struct nlmsghdr *nlh; |
474 | struct nfgenmsg *nfmsg; | |
df6fb868 | 475 | struct nlattr *nest_parms; |
19abb7b0 | 476 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
477 | struct sk_buff *skb; |
478 | unsigned int type; | |
c1d10adb | 479 | unsigned int flags = 0, group; |
dd7669a9 | 480 | int err; |
c1d10adb PNA |
481 | |
482 | /* ignore our fake conntrack entry */ | |
483 | if (ct == &nf_conntrack_untracked) | |
e34d5c1a | 484 | return 0; |
c1d10adb | 485 | |
a0891aa6 | 486 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
487 | type = IPCTNL_MSG_CT_DELETE; |
488 | group = NFNLGRP_CONNTRACK_DESTROY; | |
a0891aa6 | 489 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
490 | type = IPCTNL_MSG_CT_NEW; |
491 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 492 | group = NFNLGRP_CONNTRACK_NEW; |
17e6e4ea | 493 | } else if (events) { |
c1d10adb PNA |
494 | type = IPCTNL_MSG_CT_NEW; |
495 | group = NFNLGRP_CONNTRACK_UPDATE; | |
496 | } else | |
e34d5c1a | 497 | return 0; |
a2427692 | 498 | |
9592a5c0 AD |
499 | net = nf_ct_net(ct); |
500 | if (!item->report && !nfnetlink_has_listeners(net, group)) | |
e34d5c1a | 501 | return 0; |
a2427692 | 502 | |
03b64f51 PNA |
503 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
504 | if (skb == NULL) | |
150ace0d | 505 | goto errout; |
c1d10adb | 506 | |
c1d10adb | 507 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
96bcf938 PNA |
508 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
509 | if (nlh == NULL) | |
510 | goto nlmsg_failure; | |
c1d10adb | 511 | |
96bcf938 | 512 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 513 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
514 | nfmsg->version = NFNETLINK_V0; |
515 | nfmsg->res_id = 0; | |
516 | ||
528a3a6f | 517 | rcu_read_lock(); |
df6fb868 PM |
518 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
519 | if (!nest_parms) | |
520 | goto nla_put_failure; | |
f2f3e38c | 521 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
522 | goto nla_put_failure; |
523 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 524 | |
df6fb868 PM |
525 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
526 | if (!nest_parms) | |
527 | goto nla_put_failure; | |
f2f3e38c | 528 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
529 | goto nla_put_failure; |
530 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 531 | |
ef00f89f PM |
532 | if (nf_ct_zone(ct)) |
533 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); | |
534 | ||
1eedf699 EL |
535 | if (ctnetlink_dump_id(skb, ct) < 0) |
536 | goto nla_put_failure; | |
537 | ||
e57dce60 FH |
538 | if (ctnetlink_dump_status(skb, ct) < 0) |
539 | goto nla_put_failure; | |
540 | ||
a0891aa6 | 541 | if (events & (1 << IPCT_DESTROY)) { |
7b621c1e PNA |
542 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
543 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 544 | goto nla_put_failure; |
7b621c1e | 545 | } else { |
7b621c1e | 546 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 547 | goto nla_put_failure; |
7b621c1e | 548 | |
a0891aa6 | 549 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 550 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 551 | goto nla_put_failure; |
7b621c1e | 552 | |
a0891aa6 | 553 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 554 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 555 | goto nla_put_failure; |
7b621c1e | 556 | |
37fccd85 | 557 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 558 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
37fccd85 PNA |
559 | && ctnetlink_dump_secmark(skb, ct) < 0) |
560 | goto nla_put_failure; | |
561 | #endif | |
7b621c1e | 562 | |
a0891aa6 | 563 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
564 | ctnetlink_dump_master(skb, ct) < 0) |
565 | goto nla_put_failure; | |
566 | ||
a0891aa6 | 567 | if (events & (1 << IPCT_NATSEQADJ) && |
13eae15a PNA |
568 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
569 | goto nla_put_failure; | |
7b621c1e | 570 | } |
b9a37e0c | 571 | |
a83099a6 | 572 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 573 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
574 | && ctnetlink_dump_mark(skb, ct) < 0) |
575 | goto nla_put_failure; | |
576 | #endif | |
528a3a6f | 577 | rcu_read_unlock(); |
a83099a6 | 578 | |
96bcf938 | 579 | nlmsg_end(skb, nlh); |
9592a5c0 | 580 | err = nfnetlink_send(skb, net, item->pid, group, item->report, |
cd8c20b6 | 581 | GFP_ATOMIC); |
dd7669a9 PNA |
582 | if (err == -ENOBUFS || err == -EAGAIN) |
583 | return -ENOBUFS; | |
584 | ||
e34d5c1a | 585 | return 0; |
c1d10adb | 586 | |
df6fb868 | 587 | nla_put_failure: |
528a3a6f | 588 | rcu_read_unlock(); |
96bcf938 | 589 | nlmsg_cancel(skb, nlh); |
528a3a6f | 590 | nlmsg_failure: |
c1d10adb | 591 | kfree_skb(skb); |
150ace0d | 592 | errout: |
37b7ef72 PNA |
593 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
594 | return -ENOBUFS; | |
595 | ||
e34d5c1a | 596 | return 0; |
c1d10adb PNA |
597 | } |
598 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
599 | ||
600 | static int ctnetlink_done(struct netlink_callback *cb) | |
601 | { | |
89f2e218 PM |
602 | if (cb->args[1]) |
603 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
604 | return 0; |
605 | } | |
606 | ||
607 | static int | |
608 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
609 | { | |
9592a5c0 | 610 | struct net *net = sock_net(skb->sk); |
89f2e218 | 611 | struct nf_conn *ct, *last; |
c1d10adb | 612 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 613 | struct hlist_nulls_node *n; |
96bcf938 | 614 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 615 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 616 | |
76507f69 | 617 | rcu_read_lock(); |
d205dc40 | 618 | last = (struct nf_conn *)cb->args[1]; |
9ab99d5a | 619 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
89f2e218 | 620 | restart: |
9592a5c0 | 621 | hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[cb->args[0]], |
ea781f19 | 622 | hnnode) { |
5b1158e9 | 623 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
624 | continue; |
625 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
626 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
627 | continue; | |
87711cb8 PNA |
628 | /* Dump entries of a given L3 protocol number. |
629 | * If it is not specified, ie. l3proto == 0, | |
630 | * then dump everything. */ | |
5e8fbe2a | 631 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 632 | goto releasect; |
d205dc40 PM |
633 | if (cb->args[1]) { |
634 | if (ct != last) | |
ea781f19 | 635 | goto releasect; |
d205dc40 | 636 | cb->args[1] = 0; |
89f2e218 | 637 | } |
c1d10adb | 638 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 639 | cb->nlh->nlmsg_seq, |
8b0a231d | 640 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
89f2e218 | 641 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 642 | goto out; |
89f2e218 | 643 | } |
58401572 | 644 | |
01f34848 | 645 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
646 | IPCTNL_MSG_CT_GET_CTRZERO) { |
647 | struct nf_conn_counter *acct; | |
648 | ||
649 | acct = nf_conn_acct_find(ct); | |
650 | if (acct) | |
651 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
652 | } | |
ea781f19 ED |
653 | releasect: |
654 | nf_ct_put(ct); | |
89f2e218 | 655 | } |
d205dc40 | 656 | if (cb->args[1]) { |
89f2e218 PM |
657 | cb->args[1] = 0; |
658 | goto restart; | |
c1d10adb PNA |
659 | } |
660 | } | |
89f2e218 | 661 | out: |
76507f69 | 662 | rcu_read_unlock(); |
d205dc40 PM |
663 | if (last) |
664 | nf_ct_put(last); | |
c1d10adb | 665 | |
c1d10adb PNA |
666 | return skb->len; |
667 | } | |
668 | ||
c1d10adb | 669 | static inline int |
df6fb868 | 670 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 671 | { |
df6fb868 | 672 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
673 | struct nf_conntrack_l3proto *l3proto; |
674 | int ret = 0; | |
675 | ||
df6fb868 | 676 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 677 | |
cd91566e FW |
678 | rcu_read_lock(); |
679 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 680 | |
f73e924c PM |
681 | if (likely(l3proto->nlattr_to_tuple)) { |
682 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
683 | l3proto->nla_policy); | |
684 | if (ret == 0) | |
685 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
686 | } | |
c1d10adb | 687 | |
cd91566e | 688 | rcu_read_unlock(); |
c1d10adb | 689 | |
c1d10adb PNA |
690 | return ret; |
691 | } | |
692 | ||
f73e924c PM |
693 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
694 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
695 | }; |
696 | ||
697 | static inline int | |
df6fb868 | 698 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
699 | struct nf_conntrack_tuple *tuple) |
700 | { | |
df6fb868 | 701 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 702 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
703 | int ret = 0; |
704 | ||
f73e924c PM |
705 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
706 | if (ret < 0) | |
707 | return ret; | |
c1d10adb | 708 | |
df6fb868 | 709 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 710 | return -EINVAL; |
77236b6e | 711 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 712 | |
cd91566e FW |
713 | rcu_read_lock(); |
714 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 715 | |
f73e924c PM |
716 | if (likely(l4proto->nlattr_to_tuple)) { |
717 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
718 | l4proto->nla_policy); | |
719 | if (ret == 0) | |
720 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
721 | } | |
c1d10adb | 722 | |
cd91566e | 723 | rcu_read_unlock(); |
601e68e1 | 724 | |
c1d10adb PNA |
725 | return ret; |
726 | } | |
727 | ||
d0b0268f PM |
728 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
729 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
730 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
731 | }; | |
732 | ||
bb5cf80e | 733 | static int |
39938324 PM |
734 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
735 | struct nf_conntrack_tuple *tuple, | |
c1d10adb PNA |
736 | enum ctattr_tuple type, u_int8_t l3num) |
737 | { | |
df6fb868 | 738 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
739 | int err; |
740 | ||
c1d10adb PNA |
741 | memset(tuple, 0, sizeof(*tuple)); |
742 | ||
d0b0268f | 743 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
c1d10adb | 744 | |
df6fb868 | 745 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
746 | return -EINVAL; |
747 | ||
748 | tuple->src.l3num = l3num; | |
749 | ||
df6fb868 | 750 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
751 | if (err < 0) |
752 | return err; | |
753 | ||
df6fb868 | 754 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
755 | return -EINVAL; |
756 | ||
df6fb868 | 757 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
758 | if (err < 0) |
759 | return err; | |
760 | ||
761 | /* orig and expect tuples get DIR_ORIGINAL */ | |
762 | if (type == CTA_TUPLE_REPLY) | |
763 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
764 | else | |
765 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
766 | ||
c1d10adb PNA |
767 | return 0; |
768 | } | |
769 | ||
ef00f89f PM |
770 | static int |
771 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) | |
772 | { | |
773 | if (attr) | |
774 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
775 | *zone = ntohs(nla_get_be16(attr)); | |
776 | #else | |
777 | return -EOPNOTSUPP; | |
778 | #endif | |
779 | else | |
780 | *zone = 0; | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
d0b0268f PM |
785 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
786 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING }, | |
787 | }; | |
788 | ||
c1d10adb | 789 | static inline int |
39938324 | 790 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name) |
c1d10adb | 791 | { |
df6fb868 | 792 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 793 | |
d0b0268f | 794 | nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
c1d10adb | 795 | |
df6fb868 | 796 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
797 | return -EINVAL; |
798 | ||
df6fb868 | 799 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
800 | |
801 | return 0; | |
802 | } | |
803 | ||
f73e924c | 804 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
805 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
806 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 807 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
808 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
809 | [CTA_HELP] = { .type = NLA_NESTED }, | |
810 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
811 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
812 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 813 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
814 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
815 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
ef00f89f | 816 | [CTA_ZONE] = { .type = NLA_U16 }, |
c1d10adb PNA |
817 | }; |
818 | ||
819 | static int | |
601e68e1 | 820 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
821 | const struct nlmsghdr *nlh, |
822 | const struct nlattr * const cda[]) | |
c1d10adb | 823 | { |
9592a5c0 | 824 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
825 | struct nf_conntrack_tuple_hash *h; |
826 | struct nf_conntrack_tuple tuple; | |
827 | struct nf_conn *ct; | |
96bcf938 | 828 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 829 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
830 | u16 zone; |
831 | int err; | |
832 | ||
833 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
834 | if (err < 0) | |
835 | return err; | |
c1d10adb | 836 | |
df6fb868 | 837 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 838 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 839 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
840 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
841 | else { | |
842 | /* Flush the whole table */ | |
9592a5c0 | 843 | nf_conntrack_flush_report(net, |
274d383b PNA |
844 | NETLINK_CB(skb).pid, |
845 | nlmsg_report(nlh)); | |
c1d10adb PNA |
846 | return 0; |
847 | } | |
848 | ||
849 | if (err < 0) | |
850 | return err; | |
851 | ||
ef00f89f | 852 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 853 | if (!h) |
c1d10adb | 854 | return -ENOENT; |
c1d10adb PNA |
855 | |
856 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 857 | |
df6fb868 | 858 | if (cda[CTA_ID]) { |
77236b6e | 859 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 860 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
861 | nf_ct_put(ct); |
862 | return -ENOENT; | |
863 | } | |
601e68e1 | 864 | } |
c1d10adb | 865 | |
dd7669a9 PNA |
866 | if (nf_conntrack_event_report(IPCT_DESTROY, ct, |
867 | NETLINK_CB(skb).pid, | |
868 | nlmsg_report(nlh)) < 0) { | |
869 | nf_ct_delete_from_lists(ct); | |
870 | /* we failed to report the event, try later */ | |
871 | nf_ct_insert_dying_list(ct); | |
872 | nf_ct_put(ct); | |
873 | return 0; | |
874 | } | |
19abb7b0 PNA |
875 | |
876 | /* death_by_timeout would report the event again */ | |
877 | set_bit(IPS_DYING_BIT, &ct->status); | |
878 | ||
51091764 | 879 | nf_ct_kill(ct); |
c1d10adb | 880 | nf_ct_put(ct); |
c1d10adb PNA |
881 | |
882 | return 0; | |
883 | } | |
884 | ||
885 | static int | |
601e68e1 | 886 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
887 | const struct nlmsghdr *nlh, |
888 | const struct nlattr * const cda[]) | |
c1d10adb | 889 | { |
9592a5c0 | 890 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
891 | struct nf_conntrack_tuple_hash *h; |
892 | struct nf_conntrack_tuple tuple; | |
893 | struct nf_conn *ct; | |
894 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 895 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 896 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
897 | u16 zone; |
898 | int err; | |
c1d10adb | 899 | |
58401572 | 900 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
901 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
902 | ctnetlink_done); | |
c1d10adb | 903 | |
ef00f89f PM |
904 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
905 | if (err < 0) | |
906 | return err; | |
907 | ||
df6fb868 | 908 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 909 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 910 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
911 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
912 | else | |
913 | return -EINVAL; | |
914 | ||
915 | if (err < 0) | |
916 | return err; | |
917 | ||
ef00f89f | 918 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 919 | if (!h) |
c1d10adb | 920 | return -ENOENT; |
9ea8cfd6 | 921 | |
c1d10adb PNA |
922 | ct = nf_ct_tuplehash_to_ctrack(h); |
923 | ||
924 | err = -ENOMEM; | |
96bcf938 PNA |
925 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
926 | if (skb2 == NULL) { | |
c1d10adb PNA |
927 | nf_ct_put(ct); |
928 | return -ENOMEM; | |
929 | } | |
c1d10adb | 930 | |
528a3a6f | 931 | rcu_read_lock(); |
601e68e1 | 932 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
8b0a231d | 933 | IPCTNL_MSG_CT_NEW, ct); |
528a3a6f | 934 | rcu_read_unlock(); |
c1d10adb PNA |
935 | nf_ct_put(ct); |
936 | if (err <= 0) | |
937 | goto free; | |
938 | ||
939 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
940 | if (err < 0) | |
941 | goto out; | |
942 | ||
c1d10adb PNA |
943 | return 0; |
944 | ||
945 | free: | |
946 | kfree_skb(skb2); | |
947 | out: | |
948 | return err; | |
949 | } | |
950 | ||
67671841 | 951 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
952 | static int |
953 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
954 | enum nf_nat_manip_type manip, | |
39938324 | 955 | const struct nlattr *attr) |
e6a7d3c0 PNA |
956 | { |
957 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
958 | ||
959 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
960 | if (!parse_nat_setup) { | |
95a5afca | 961 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 962 | rcu_read_unlock(); |
748085fc | 963 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
964 | nfnl_unlock(); |
965 | if (request_module("nf-nat-ipv4") < 0) { | |
966 | nfnl_lock(); | |
748085fc | 967 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
968 | rcu_read_lock(); |
969 | return -EOPNOTSUPP; | |
970 | } | |
971 | nfnl_lock(); | |
748085fc | 972 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
973 | rcu_read_lock(); |
974 | if (nfnetlink_parse_nat_setup_hook) | |
975 | return -EAGAIN; | |
976 | #endif | |
977 | return -EOPNOTSUPP; | |
978 | } | |
979 | ||
980 | return parse_nat_setup(ct, manip, attr); | |
981 | } | |
67671841 | 982 | #endif |
e6a7d3c0 | 983 | |
bb5cf80e | 984 | static int |
39938324 | 985 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
986 | { |
987 | unsigned long d; | |
77236b6e | 988 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
989 | d = ct->status ^ status; |
990 | ||
991 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
992 | /* unchangeable */ | |
0adf9d67 | 993 | return -EBUSY; |
601e68e1 | 994 | |
c1d10adb PNA |
995 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
996 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 997 | return -EBUSY; |
601e68e1 | 998 | |
c1d10adb PNA |
999 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
1000 | /* ASSURED bit can only be set */ | |
0adf9d67 | 1001 | return -EBUSY; |
c1d10adb | 1002 | |
c1d10adb PNA |
1003 | /* Be careful here, modifying NAT bits can screw up things, |
1004 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 1005 | * nf_nat_range. */ |
c1d10adb PNA |
1006 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
1007 | return 0; | |
1008 | } | |
1009 | ||
e6a7d3c0 | 1010 | static int |
39938324 | 1011 | ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1012 | { |
1013 | #ifdef CONFIG_NF_NAT_NEEDED | |
1014 | int ret; | |
1015 | ||
1016 | if (cda[CTA_NAT_DST]) { | |
1017 | ret = ctnetlink_parse_nat_setup(ct, | |
1018 | IP_NAT_MANIP_DST, | |
1019 | cda[CTA_NAT_DST]); | |
1020 | if (ret < 0) | |
1021 | return ret; | |
1022 | } | |
1023 | if (cda[CTA_NAT_SRC]) { | |
1024 | ret = ctnetlink_parse_nat_setup(ct, | |
1025 | IP_NAT_MANIP_SRC, | |
1026 | cda[CTA_NAT_SRC]); | |
1027 | if (ret < 0) | |
1028 | return ret; | |
1029 | } | |
1030 | return 0; | |
1031 | #else | |
1032 | return -EOPNOTSUPP; | |
1033 | #endif | |
1034 | } | |
c1d10adb PNA |
1035 | |
1036 | static inline int | |
39938324 | 1037 | ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1038 | { |
1039 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1040 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1041 | char *helpname = NULL; |
c1d10adb PNA |
1042 | int err; |
1043 | ||
c1d10adb PNA |
1044 | /* don't change helper of sibling connections */ |
1045 | if (ct->master) | |
0adf9d67 | 1046 | return -EBUSY; |
c1d10adb | 1047 | |
df6fb868 | 1048 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
1049 | if (err < 0) |
1050 | return err; | |
1051 | ||
df293bbb YK |
1052 | if (!strcmp(helpname, "")) { |
1053 | if (help && help->helper) { | |
c1d10adb PNA |
1054 | /* we had a helper before ... */ |
1055 | nf_ct_remove_expectations(ct); | |
3c158f7f | 1056 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 1057 | } |
df293bbb YK |
1058 | |
1059 | return 0; | |
c1d10adb | 1060 | } |
601e68e1 | 1061 | |
794e6871 PM |
1062 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1063 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1064 | if (helper == NULL) { |
1065 | #ifdef CONFIG_MODULES | |
1066 | spin_unlock_bh(&nf_conntrack_lock); | |
1067 | ||
1068 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1069 | spin_lock_bh(&nf_conntrack_lock); | |
1070 | return -EOPNOTSUPP; | |
1071 | } | |
1072 | ||
1073 | spin_lock_bh(&nf_conntrack_lock); | |
794e6871 PM |
1074 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1075 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1076 | if (helper) |
1077 | return -EAGAIN; | |
1078 | #endif | |
0adf9d67 | 1079 | return -EOPNOTSUPP; |
226c0c0e | 1080 | } |
df293bbb | 1081 | |
ceceae1b YK |
1082 | if (help) { |
1083 | if (help->helper == helper) | |
1084 | return 0; | |
1085 | if (help->helper) | |
1086 | return -EBUSY; | |
1087 | /* need to zero data of old helper */ | |
1088 | memset(&help->help, 0, sizeof(help->help)); | |
1089 | } else { | |
a88e22ad PNA |
1090 | /* we cannot set a helper for an existing conntrack */ |
1091 | return -EOPNOTSUPP; | |
ceceae1b | 1092 | } |
df293bbb | 1093 | |
3c158f7f | 1094 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
1095 | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static inline int | |
39938324 | 1100 | ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1101 | { |
77236b6e | 1102 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1103 | |
c1d10adb PNA |
1104 | if (!del_timer(&ct->timeout)) |
1105 | return -ETIME; | |
1106 | ||
1107 | ct->timeout.expires = jiffies + timeout * HZ; | |
1108 | add_timer(&ct->timeout); | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
d0b0268f PM |
1113 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1114 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1115 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1116 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1117 | }; | |
1118 | ||
c1d10adb | 1119 | static inline int |
39938324 | 1120 | ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1121 | { |
39938324 PM |
1122 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
1123 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; | |
605dcad6 | 1124 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1125 | int err = 0; |
1126 | ||
d0b0268f | 1127 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
c1d10adb | 1128 | |
cd91566e FW |
1129 | rcu_read_lock(); |
1130 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1131 | if (l4proto->from_nlattr) |
1132 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1133 | rcu_read_unlock(); |
c1d10adb PNA |
1134 | |
1135 | return err; | |
1136 | } | |
1137 | ||
13eae15a | 1138 | #ifdef CONFIG_NF_NAT_NEEDED |
d0b0268f PM |
1139 | static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = { |
1140 | [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1141 | [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1142 | [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
1143 | }; | |
1144 | ||
13eae15a | 1145 | static inline int |
39938324 | 1146 | change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr) |
13eae15a PNA |
1147 | { |
1148 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1149 | ||
d0b0268f | 1150 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy); |
13eae15a PNA |
1151 | |
1152 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1153 | return -EINVAL; | |
1154 | ||
1155 | natseq->correction_pos = | |
77236b6e | 1156 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1157 | |
1158 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1159 | return -EINVAL; | |
1160 | ||
1161 | natseq->offset_before = | |
77236b6e | 1162 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1163 | |
1164 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1165 | return -EINVAL; | |
1166 | ||
1167 | natseq->offset_after = | |
77236b6e | 1168 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1169 | |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | static int | |
39938324 PM |
1174 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, |
1175 | const struct nlattr * const cda[]) | |
13eae15a PNA |
1176 | { |
1177 | int ret = 0; | |
1178 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1179 | ||
1180 | if (!nat) | |
1181 | return 0; | |
1182 | ||
1183 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1184 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1185 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1186 | if (ret < 0) | |
1187 | return ret; | |
1188 | ||
1189 | ct->status |= IPS_SEQ_ADJUST; | |
1190 | } | |
1191 | ||
1192 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1193 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1194 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1195 | if (ret < 0) | |
1196 | return ret; | |
1197 | ||
1198 | ct->status |= IPS_SEQ_ADJUST; | |
1199 | } | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | #endif | |
1204 | ||
c1d10adb | 1205 | static int |
39938324 PM |
1206 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1207 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1208 | { |
1209 | int err; | |
1210 | ||
e098360f PNA |
1211 | /* only allow NAT changes and master assignation for new conntracks */ |
1212 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1213 | return -EOPNOTSUPP; | |
1214 | ||
df6fb868 | 1215 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1216 | err = ctnetlink_change_helper(ct, cda); |
1217 | if (err < 0) | |
1218 | return err; | |
1219 | } | |
1220 | ||
df6fb868 | 1221 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1222 | err = ctnetlink_change_timeout(ct, cda); |
1223 | if (err < 0) | |
1224 | return err; | |
1225 | } | |
1226 | ||
df6fb868 | 1227 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1228 | err = ctnetlink_change_status(ct, cda); |
1229 | if (err < 0) | |
1230 | return err; | |
1231 | } | |
1232 | ||
df6fb868 | 1233 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1234 | err = ctnetlink_change_protoinfo(ct, cda); |
1235 | if (err < 0) | |
1236 | return err; | |
1237 | } | |
1238 | ||
bcd1e830 | 1239 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1240 | if (cda[CTA_MARK]) |
77236b6e | 1241 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1242 | #endif |
1243 | ||
13eae15a PNA |
1244 | #ifdef CONFIG_NF_NAT_NEEDED |
1245 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1246 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1247 | if (err < 0) | |
1248 | return err; | |
1249 | } | |
1250 | #endif | |
1251 | ||
c1d10adb PNA |
1252 | return 0; |
1253 | } | |
1254 | ||
f0a3c086 | 1255 | static struct nf_conn * |
ef00f89f | 1256 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
9592a5c0 | 1257 | const struct nlattr * const cda[], |
c1d10adb | 1258 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1259 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1260 | u8 u3) |
c1d10adb PNA |
1261 | { |
1262 | struct nf_conn *ct; | |
1263 | int err = -EINVAL; | |
ceceae1b | 1264 | struct nf_conntrack_helper *helper; |
c1d10adb | 1265 | |
ef00f89f | 1266 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1267 | if (IS_ERR(ct)) |
f0a3c086 | 1268 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1269 | |
df6fb868 | 1270 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1271 | goto err1; |
77236b6e | 1272 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1273 | |
1274 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
c1d10adb | 1275 | |
1575e7ea | 1276 | rcu_read_lock(); |
226c0c0e | 1277 | if (cda[CTA_HELP]) { |
29fe1b48 | 1278 | char *helpname = NULL; |
226c0c0e PNA |
1279 | |
1280 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1281 | if (err < 0) |
1282 | goto err2; | |
226c0c0e | 1283 | |
794e6871 PM |
1284 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1285 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1286 | if (helper == NULL) { |
1287 | rcu_read_unlock(); | |
1288 | #ifdef CONFIG_MODULES | |
1289 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1290 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1291 | goto err1; |
226c0c0e PNA |
1292 | } |
1293 | ||
1294 | rcu_read_lock(); | |
794e6871 PM |
1295 | helper = __nf_conntrack_helper_find(helpname, |
1296 | nf_ct_l3num(ct), | |
1297 | nf_ct_protonum(ct)); | |
226c0c0e | 1298 | if (helper) { |
226c0c0e | 1299 | err = -EAGAIN; |
0f5b3e85 | 1300 | goto err2; |
226c0c0e PNA |
1301 | } |
1302 | rcu_read_unlock(); | |
1303 | #endif | |
1304 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1305 | goto err1; |
226c0c0e PNA |
1306 | } else { |
1307 | struct nf_conn_help *help; | |
1308 | ||
1309 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1310 | if (help == NULL) { | |
226c0c0e | 1311 | err = -ENOMEM; |
0f5b3e85 | 1312 | goto err2; |
226c0c0e PNA |
1313 | } |
1314 | ||
1315 | /* not in hash table yet so not strictly necessary */ | |
1316 | rcu_assign_pointer(help->helper, helper); | |
1317 | } | |
1318 | } else { | |
1319 | /* try an implicit helper assignation */ | |
b2a15a60 | 1320 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1321 | if (err < 0) |
1322 | goto err2; | |
1575e7ea PNA |
1323 | } |
1324 | ||
a88e22ad PNA |
1325 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
1326 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1327 | if (err < 0) |
1328 | goto err2; | |
e6a7d3c0 PNA |
1329 | } |
1330 | ||
a88e22ad PNA |
1331 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
1332 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); | |
1333 | /* we must add conntrack extensions before confirmation. */ | |
1334 | ct->status |= IPS_CONFIRMED; | |
1335 | ||
1336 | if (cda[CTA_STATUS]) { | |
1337 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1338 | if (err < 0) |
1339 | goto err2; | |
bbb3357d | 1340 | } |
c1d10adb | 1341 | |
c969aa7d PNA |
1342 | #ifdef CONFIG_NF_NAT_NEEDED |
1343 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1344 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1345 | if (err < 0) |
1346 | goto err2; | |
c969aa7d PNA |
1347 | } |
1348 | #endif | |
1349 | ||
df6fb868 | 1350 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1351 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1352 | if (err < 0) |
1353 | goto err2; | |
c1d10adb PNA |
1354 | } |
1355 | ||
bcd1e830 | 1356 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1357 | if (cda[CTA_MARK]) |
77236b6e | 1358 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1359 | #endif |
1360 | ||
5faa1f4c | 1361 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1362 | if (cda[CTA_TUPLE_MASTER]) { |
1363 | struct nf_conntrack_tuple master; | |
1364 | struct nf_conntrack_tuple_hash *master_h; | |
1365 | struct nf_conn *master_ct; | |
1366 | ||
1367 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1368 | if (err < 0) | |
0f5b3e85 | 1369 | goto err2; |
7ec47496 | 1370 | |
ef00f89f | 1371 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
1372 | if (master_h == NULL) { |
1373 | err = -ENOENT; | |
0f5b3e85 | 1374 | goto err2; |
7ec47496 PNA |
1375 | } |
1376 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1377 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1378 | ct->master = master_ct; |
f2a89004 | 1379 | } |
5faa1f4c | 1380 | |
c1d10adb PNA |
1381 | add_timer(&ct->timeout); |
1382 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1383 | rcu_read_unlock(); |
dafc741c | 1384 | |
f0a3c086 | 1385 | return ct; |
c1d10adb | 1386 | |
0f5b3e85 PM |
1387 | err2: |
1388 | rcu_read_unlock(); | |
1389 | err1: | |
c1d10adb | 1390 | nf_conntrack_free(ct); |
f0a3c086 | 1391 | return ERR_PTR(err); |
c1d10adb PNA |
1392 | } |
1393 | ||
601e68e1 YH |
1394 | static int |
1395 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1396 | const struct nlmsghdr *nlh, |
1397 | const struct nlattr * const cda[]) | |
c1d10adb | 1398 | { |
9592a5c0 | 1399 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1400 | struct nf_conntrack_tuple otuple, rtuple; |
1401 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1402 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1403 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1404 | u16 zone; |
1405 | int err; | |
1406 | ||
1407 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1408 | if (err < 0) | |
1409 | return err; | |
c1d10adb | 1410 | |
df6fb868 | 1411 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1412 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1413 | if (err < 0) | |
1414 | return err; | |
1415 | } | |
1416 | ||
df6fb868 | 1417 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1418 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1419 | if (err < 0) | |
1420 | return err; | |
1421 | } | |
1422 | ||
f8ba1aff | 1423 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1424 | if (cda[CTA_TUPLE_ORIG]) |
ef00f89f | 1425 | h = __nf_conntrack_find(net, zone, &otuple); |
df6fb868 | 1426 | else if (cda[CTA_TUPLE_REPLY]) |
ef00f89f | 1427 | h = __nf_conntrack_find(net, zone, &rtuple); |
c1d10adb PNA |
1428 | |
1429 | if (h == NULL) { | |
c1d10adb | 1430 | err = -ENOENT; |
f0a3c086 PNA |
1431 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1432 | struct nf_conn *ct; | |
fecc1133 | 1433 | enum ip_conntrack_events events; |
5faa1f4c | 1434 | |
ef00f89f | 1435 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
f0a3c086 PNA |
1436 | &rtuple, u3); |
1437 | if (IS_ERR(ct)) { | |
1438 | err = PTR_ERR(ct); | |
5faa1f4c PNA |
1439 | goto out_unlock; |
1440 | } | |
f0a3c086 PNA |
1441 | err = 0; |
1442 | nf_conntrack_get(&ct->ct_general); | |
1443 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1444 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1445 | events = IPCT_RELATED; | |
1446 | else | |
1447 | events = IPCT_NEW; | |
1448 | ||
858b3133 PM |
1449 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1450 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1451 | (1 << IPCT_HELPER) | |
1452 | (1 << IPCT_PROTOINFO) | | |
1453 | (1 << IPCT_NATSEQADJ) | | |
1454 | (1 << IPCT_MARK) | events, | |
1455 | ct, NETLINK_CB(skb).pid, | |
1456 | nlmsg_report(nlh)); | |
f0a3c086 PNA |
1457 | nf_ct_put(ct); |
1458 | } else | |
1459 | spin_unlock_bh(&nf_conntrack_lock); | |
5faa1f4c | 1460 | |
c1d10adb PNA |
1461 | return err; |
1462 | } | |
1463 | /* implicit 'else' */ | |
1464 | ||
c1d10adb PNA |
1465 | /* We manipulate the conntrack inside the global conntrack table lock, |
1466 | * so there's no need to increase the refcount */ | |
c1d10adb | 1467 | err = -EEXIST; |
ff4ca827 | 1468 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1469 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1470 | ||
19abb7b0 PNA |
1471 | err = ctnetlink_change_conntrack(ct, cda); |
1472 | if (err == 0) { | |
1473 | nf_conntrack_get(&ct->ct_general); | |
1474 | spin_unlock_bh(&nf_conntrack_lock); | |
858b3133 PM |
1475 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1476 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1477 | (1 << IPCT_HELPER) | |
1478 | (1 << IPCT_PROTOINFO) | | |
1479 | (1 << IPCT_NATSEQADJ) | | |
1480 | (1 << IPCT_MARK), | |
1481 | ct, NETLINK_CB(skb).pid, | |
1482 | nlmsg_report(nlh)); | |
19abb7b0 PNA |
1483 | nf_ct_put(ct); |
1484 | } else | |
1485 | spin_unlock_bh(&nf_conntrack_lock); | |
1486 | ||
1487 | return err; | |
ff4ca827 | 1488 | } |
c1d10adb PNA |
1489 | |
1490 | out_unlock: | |
f8ba1aff | 1491 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1492 | return err; |
1493 | } | |
1494 | ||
601e68e1 YH |
1495 | /*********************************************************************** |
1496 | * EXPECT | |
1497 | ***********************************************************************/ | |
c1d10adb PNA |
1498 | |
1499 | static inline int | |
1500 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1501 | const struct nf_conntrack_tuple *tuple, | |
1502 | enum ctattr_expect type) | |
1503 | { | |
df6fb868 | 1504 | struct nlattr *nest_parms; |
601e68e1 | 1505 | |
df6fb868 PM |
1506 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1507 | if (!nest_parms) | |
1508 | goto nla_put_failure; | |
c1d10adb | 1509 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1510 | goto nla_put_failure; |
1511 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1512 | |
1513 | return 0; | |
1514 | ||
df6fb868 | 1515 | nla_put_failure: |
c1d10adb | 1516 | return -1; |
601e68e1 | 1517 | } |
c1d10adb | 1518 | |
1cde6436 PNA |
1519 | static inline int |
1520 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1521 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1522 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1523 | { |
1524 | int ret; | |
1525 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1526 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1527 | struct nf_conntrack_tuple m; |
df6fb868 | 1528 | struct nlattr *nest_parms; |
d4156e8c PM |
1529 | |
1530 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 1531 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
1532 | m.src.u.all = mask->src.u.all; |
1533 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 1534 | |
df6fb868 PM |
1535 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1536 | if (!nest_parms) | |
1537 | goto nla_put_failure; | |
1cde6436 | 1538 | |
528a3a6f | 1539 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1540 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1541 | |
1542 | if (unlikely(ret < 0)) | |
df6fb868 | 1543 | goto nla_put_failure; |
1cde6436 | 1544 | |
528a3a6f | 1545 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1546 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1547 | if (unlikely(ret < 0)) |
df6fb868 | 1548 | goto nla_put_failure; |
1cde6436 | 1549 | |
df6fb868 | 1550 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1551 | |
1552 | return 0; | |
1553 | ||
df6fb868 | 1554 | nla_put_failure: |
1cde6436 PNA |
1555 | return -1; |
1556 | } | |
1557 | ||
bb5cf80e | 1558 | static int |
c1d10adb | 1559 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1560 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1561 | { |
1562 | struct nf_conn *master = exp->master; | |
d1e7a03f | 1563 | struct nf_conntrack_helper *helper; |
d978e5da PM |
1564 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1565 | ||
1566 | if (timeout < 0) | |
1567 | timeout = 0; | |
c1d10adb PNA |
1568 | |
1569 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1570 | goto nla_put_failure; |
1cde6436 | 1571 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1572 | goto nla_put_failure; |
c1d10adb PNA |
1573 | if (ctnetlink_exp_dump_tuple(skb, |
1574 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1575 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1576 | goto nla_put_failure; |
601e68e1 | 1577 | |
d978e5da | 1578 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1579 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
d1e7a03f PM |
1580 | helper = rcu_dereference(nfct_help(master)->helper); |
1581 | if (helper) | |
1582 | NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name); | |
c1d10adb PNA |
1583 | |
1584 | return 0; | |
601e68e1 | 1585 | |
df6fb868 | 1586 | nla_put_failure: |
c1d10adb PNA |
1587 | return -1; |
1588 | } | |
1589 | ||
1590 | static int | |
1591 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 1592 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1593 | { |
1594 | struct nlmsghdr *nlh; | |
1595 | struct nfgenmsg *nfmsg; | |
96bcf938 | 1596 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
1597 | |
1598 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
96bcf938 PNA |
1599 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
1600 | if (nlh == NULL) | |
1601 | goto nlmsg_failure; | |
c1d10adb | 1602 | |
96bcf938 | 1603 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1604 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1605 | nfmsg->version = NFNETLINK_V0; | |
1606 | nfmsg->res_id = 0; | |
1607 | ||
1608 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1609 | goto nla_put_failure; |
c1d10adb | 1610 | |
96bcf938 | 1611 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
1612 | return skb->len; |
1613 | ||
1614 | nlmsg_failure: | |
df6fb868 | 1615 | nla_put_failure: |
96bcf938 | 1616 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
1617 | return -1; |
1618 | } | |
1619 | ||
1620 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
1621 | static int |
1622 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 1623 | { |
9592a5c0 AD |
1624 | struct nf_conntrack_expect *exp = item->exp; |
1625 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
1626 | struct nlmsghdr *nlh; |
1627 | struct nfgenmsg *nfmsg; | |
c1d10adb PNA |
1628 | struct sk_buff *skb; |
1629 | unsigned int type; | |
c1d10adb PNA |
1630 | int flags = 0; |
1631 | ||
a0891aa6 | 1632 | if (events & (1 << IPEXP_NEW)) { |
c1d10adb PNA |
1633 | type = IPCTNL_MSG_EXP_NEW; |
1634 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1635 | } else | |
e34d5c1a | 1636 | return 0; |
c1d10adb | 1637 | |
1f9da256 | 1638 | if (!item->report && |
9592a5c0 | 1639 | !nfnetlink_has_listeners(net, NFNLGRP_CONNTRACK_EXP_NEW)) |
e34d5c1a | 1640 | return 0; |
b3a27bfb | 1641 | |
96bcf938 PNA |
1642 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1643 | if (skb == NULL) | |
150ace0d | 1644 | goto errout; |
c1d10adb | 1645 | |
b633ad5f | 1646 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
96bcf938 PNA |
1647 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
1648 | if (nlh == NULL) | |
1649 | goto nlmsg_failure; | |
c1d10adb | 1650 | |
96bcf938 | 1651 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1652 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1653 | nfmsg->version = NFNETLINK_V0; | |
1654 | nfmsg->res_id = 0; | |
1655 | ||
528a3a6f | 1656 | rcu_read_lock(); |
c1d10adb | 1657 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1658 | goto nla_put_failure; |
528a3a6f | 1659 | rcu_read_unlock(); |
c1d10adb | 1660 | |
96bcf938 | 1661 | nlmsg_end(skb, nlh); |
9592a5c0 | 1662 | nfnetlink_send(skb, net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, |
e34d5c1a PNA |
1663 | item->report, GFP_ATOMIC); |
1664 | return 0; | |
c1d10adb | 1665 | |
df6fb868 | 1666 | nla_put_failure: |
528a3a6f | 1667 | rcu_read_unlock(); |
96bcf938 | 1668 | nlmsg_cancel(skb, nlh); |
528a3a6f | 1669 | nlmsg_failure: |
c1d10adb | 1670 | kfree_skb(skb); |
150ace0d | 1671 | errout: |
9592a5c0 | 1672 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 1673 | return 0; |
c1d10adb PNA |
1674 | } |
1675 | #endif | |
cf6994c2 PM |
1676 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1677 | { | |
31f15875 PM |
1678 | if (cb->args[1]) |
1679 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1680 | return 0; |
1681 | } | |
c1d10adb PNA |
1682 | |
1683 | static int | |
1684 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1685 | { | |
9592a5c0 | 1686 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 1687 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 1688 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
31f15875 | 1689 | struct hlist_node *n; |
87711cb8 | 1690 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1691 | |
7d0742da | 1692 | rcu_read_lock(); |
31f15875 PM |
1693 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1694 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1695 | restart: |
9b03f38d | 1696 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1697 | hnode) { |
1698 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1699 | continue; |
31f15875 PM |
1700 | if (cb->args[1]) { |
1701 | if (exp != last) | |
1702 | continue; | |
1703 | cb->args[1] = 0; | |
1704 | } | |
8b0a231d PNA |
1705 | if (ctnetlink_exp_fill_info(skb, |
1706 | NETLINK_CB(cb->skb).pid, | |
31f15875 PM |
1707 | cb->nlh->nlmsg_seq, |
1708 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 1709 | exp) < 0) { |
7d0742da PM |
1710 | if (!atomic_inc_not_zero(&exp->use)) |
1711 | continue; | |
31f15875 PM |
1712 | cb->args[1] = (unsigned long)exp; |
1713 | goto out; | |
1714 | } | |
cf6994c2 | 1715 | } |
31f15875 PM |
1716 | if (cb->args[1]) { |
1717 | cb->args[1] = 0; | |
1718 | goto restart; | |
cf6994c2 PM |
1719 | } |
1720 | } | |
601e68e1 | 1721 | out: |
7d0742da | 1722 | rcu_read_unlock(); |
cf6994c2 PM |
1723 | if (last) |
1724 | nf_ct_expect_put(last); | |
c1d10adb | 1725 | |
c1d10adb PNA |
1726 | return skb->len; |
1727 | } | |
1728 | ||
f73e924c | 1729 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
d0b0268f PM |
1730 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
1731 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
1732 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
f73e924c PM |
1733 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
1734 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
d0b0268f | 1735 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING }, |
c1d10adb PNA |
1736 | }; |
1737 | ||
1738 | static int | |
601e68e1 | 1739 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1740 | const struct nlmsghdr *nlh, |
1741 | const struct nlattr * const cda[]) | |
c1d10adb | 1742 | { |
9592a5c0 | 1743 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1744 | struct nf_conntrack_tuple tuple; |
1745 | struct nf_conntrack_expect *exp; | |
1746 | struct sk_buff *skb2; | |
96bcf938 | 1747 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1748 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1749 | u16 zone; |
1750 | int err; | |
c1d10adb | 1751 | |
c1d10adb | 1752 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1753 | return netlink_dump_start(ctnl, skb, nlh, |
1754 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1755 | ctnetlink_exp_done); |
c1d10adb PNA |
1756 | } |
1757 | ||
ef00f89f PM |
1758 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1759 | if (err < 0) | |
1760 | return err; | |
1761 | ||
df6fb868 | 1762 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1763 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1764 | else | |
1765 | return -EINVAL; | |
1766 | ||
1767 | if (err < 0) | |
1768 | return err; | |
1769 | ||
ef00f89f | 1770 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
1771 | if (!exp) |
1772 | return -ENOENT; | |
1773 | ||
df6fb868 | 1774 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1775 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1776 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1777 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1778 | return -ENOENT; |
1779 | } | |
601e68e1 | 1780 | } |
c1d10adb PNA |
1781 | |
1782 | err = -ENOMEM; | |
96bcf938 PNA |
1783 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1784 | if (skb2 == NULL) | |
c1d10adb | 1785 | goto out; |
4e9b8269 | 1786 | |
528a3a6f | 1787 | rcu_read_lock(); |
601e68e1 | 1788 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
8b0a231d | 1789 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 1790 | rcu_read_unlock(); |
c1d10adb PNA |
1791 | if (err <= 0) |
1792 | goto free; | |
1793 | ||
6823645d | 1794 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1795 | |
1796 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1797 | ||
1798 | free: | |
1799 | kfree_skb(skb2); | |
1800 | out: | |
6823645d | 1801 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1802 | return err; |
1803 | } | |
1804 | ||
1805 | static int | |
601e68e1 | 1806 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1807 | const struct nlmsghdr *nlh, |
1808 | const struct nlattr * const cda[]) | |
c1d10adb | 1809 | { |
9592a5c0 | 1810 | struct net *net = sock_net(ctnl); |
31f15875 | 1811 | struct nf_conntrack_expect *exp; |
c1d10adb | 1812 | struct nf_conntrack_tuple tuple; |
96bcf938 | 1813 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
31f15875 | 1814 | struct hlist_node *n, *next; |
c1d10adb | 1815 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1816 | unsigned int i; |
ef00f89f | 1817 | u16 zone; |
c1d10adb PNA |
1818 | int err; |
1819 | ||
df6fb868 | 1820 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 1821 | /* delete a single expect by tuple */ |
ef00f89f PM |
1822 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1823 | if (err < 0) | |
1824 | return err; | |
1825 | ||
c1d10adb PNA |
1826 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
1827 | if (err < 0) | |
1828 | return err; | |
1829 | ||
1830 | /* bump usage count to 2 */ | |
ef00f89f | 1831 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
1832 | if (!exp) |
1833 | return -ENOENT; | |
1834 | ||
df6fb868 | 1835 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1836 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1837 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1838 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1839 | return -ENOENT; |
1840 | } | |
1841 | } | |
1842 | ||
1843 | /* after list removal, usage count == 1 */ | |
6823645d | 1844 | nf_ct_unexpect_related(exp); |
601e68e1 | 1845 | /* have to put what we 'get' above. |
c1d10adb | 1846 | * after this line usage count == 0 */ |
6823645d | 1847 | nf_ct_expect_put(exp); |
df6fb868 PM |
1848 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1849 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1850 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1851 | |
1852 | /* delete all expectations for this helper */ | |
f8ba1aff | 1853 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1854 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1855 | hlist_for_each_entry_safe(exp, n, next, | |
9592a5c0 | 1856 | &net->ct.expect_hash[i], |
31f15875 PM |
1857 | hnode) { |
1858 | m_help = nfct_help(exp->master); | |
794e6871 PM |
1859 | if (!strcmp(m_help->helper->name, name) && |
1860 | del_timer(&exp->timeout)) { | |
31f15875 PM |
1861 | nf_ct_unlink_expect(exp); |
1862 | nf_ct_expect_put(exp); | |
1863 | } | |
c1d10adb PNA |
1864 | } |
1865 | } | |
f8ba1aff | 1866 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1867 | } else { |
1868 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1869 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1870 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1871 | hlist_for_each_entry_safe(exp, n, next, | |
9592a5c0 | 1872 | &net->ct.expect_hash[i], |
31f15875 PM |
1873 | hnode) { |
1874 | if (del_timer(&exp->timeout)) { | |
1875 | nf_ct_unlink_expect(exp); | |
1876 | nf_ct_expect_put(exp); | |
1877 | } | |
c1d10adb PNA |
1878 | } |
1879 | } | |
f8ba1aff | 1880 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1881 | } |
1882 | ||
1883 | return 0; | |
1884 | } | |
1885 | static int | |
39938324 PM |
1886 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
1887 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1888 | { |
1889 | return -EOPNOTSUPP; | |
1890 | } | |
1891 | ||
1892 | static int | |
ef00f89f PM |
1893 | ctnetlink_create_expect(struct net *net, u16 zone, |
1894 | const struct nlattr * const cda[], | |
9592a5c0 | 1895 | u_int8_t u3, |
39938324 | 1896 | u32 pid, int report) |
c1d10adb PNA |
1897 | { |
1898 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1899 | struct nf_conntrack_tuple_hash *h = NULL; | |
1900 | struct nf_conntrack_expect *exp; | |
1901 | struct nf_conn *ct; | |
dc808fe2 | 1902 | struct nf_conn_help *help; |
c1d10adb PNA |
1903 | int err = 0; |
1904 | ||
c1d10adb PNA |
1905 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1906 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1907 | if (err < 0) | |
1908 | return err; | |
1909 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1910 | if (err < 0) | |
1911 | return err; | |
1912 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1913 | if (err < 0) | |
1914 | return err; | |
1915 | ||
1916 | /* Look for master conntrack of this expectation */ | |
ef00f89f | 1917 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
c1d10adb PNA |
1918 | if (!h) |
1919 | return -ENOENT; | |
1920 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1921 | help = nfct_help(ct); |
c1d10adb | 1922 | |
dc808fe2 | 1923 | if (!help || !help->helper) { |
c1d10adb | 1924 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1925 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1926 | goto out; |
1927 | } | |
1928 | ||
6823645d | 1929 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1930 | if (!exp) { |
1931 | err = -ENOMEM; | |
1932 | goto out; | |
1933 | } | |
601e68e1 | 1934 | |
626ba8fb | 1935 | exp->class = 0; |
c1d10adb PNA |
1936 | exp->expectfn = NULL; |
1937 | exp->flags = 0; | |
1938 | exp->master = ct; | |
9457d851 | 1939 | exp->helper = NULL; |
c1d10adb | 1940 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1941 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1942 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1943 | |
19abb7b0 | 1944 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1945 | nf_ct_expect_put(exp); |
c1d10adb | 1946 | |
601e68e1 | 1947 | out: |
c1d10adb PNA |
1948 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1949 | return err; | |
1950 | } | |
1951 | ||
1952 | static int | |
1953 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1954 | const struct nlmsghdr *nlh, |
1955 | const struct nlattr * const cda[]) | |
c1d10adb | 1956 | { |
9592a5c0 | 1957 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1958 | struct nf_conntrack_tuple tuple; |
1959 | struct nf_conntrack_expect *exp; | |
96bcf938 | 1960 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1961 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1962 | u16 zone; |
1963 | int err; | |
c1d10adb | 1964 | |
df6fb868 PM |
1965 | if (!cda[CTA_EXPECT_TUPLE] |
1966 | || !cda[CTA_EXPECT_MASK] | |
1967 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1968 | return -EINVAL; |
1969 | ||
ef00f89f PM |
1970 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1971 | if (err < 0) | |
1972 | return err; | |
1973 | ||
c1d10adb PNA |
1974 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
1975 | if (err < 0) | |
1976 | return err; | |
1977 | ||
f8ba1aff | 1978 | spin_lock_bh(&nf_conntrack_lock); |
ef00f89f | 1979 | exp = __nf_ct_expect_find(net, zone, &tuple); |
c1d10adb PNA |
1980 | |
1981 | if (!exp) { | |
f8ba1aff | 1982 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1983 | err = -ENOENT; |
19abb7b0 | 1984 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
ef00f89f | 1985 | err = ctnetlink_create_expect(net, zone, cda, |
19abb7b0 PNA |
1986 | u3, |
1987 | NETLINK_CB(skb).pid, | |
1988 | nlmsg_report(nlh)); | |
1989 | } | |
c1d10adb PNA |
1990 | return err; |
1991 | } | |
1992 | ||
1993 | err = -EEXIST; | |
1994 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1995 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1996 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1997 | |
c1d10adb PNA |
1998 | return err; |
1999 | } | |
2000 | ||
2001 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
2002 | static struct nf_ct_event_notifier ctnl_notifier = { |
2003 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
2004 | }; |
2005 | ||
e34d5c1a PNA |
2006 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
2007 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
2008 | }; |
2009 | #endif | |
2010 | ||
7c8d4cb4 | 2011 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 2012 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
2013 | .attr_count = CTA_MAX, |
2014 | .policy = ct_nla_policy }, | |
c1d10adb | 2015 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
2016 | .attr_count = CTA_MAX, |
2017 | .policy = ct_nla_policy }, | |
c1d10adb | 2018 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
2019 | .attr_count = CTA_MAX, |
2020 | .policy = ct_nla_policy }, | |
c1d10adb | 2021 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
2022 | .attr_count = CTA_MAX, |
2023 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
2024 | }; |
2025 | ||
7c8d4cb4 | 2026 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 2027 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
2028 | .attr_count = CTA_EXPECT_MAX, |
2029 | .policy = exp_nla_policy }, | |
c1d10adb | 2030 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
2031 | .attr_count = CTA_EXPECT_MAX, |
2032 | .policy = exp_nla_policy }, | |
c1d10adb | 2033 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
2034 | .attr_count = CTA_EXPECT_MAX, |
2035 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
2036 | }; |
2037 | ||
7c8d4cb4 | 2038 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
2039 | .name = "conntrack", |
2040 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
2041 | .cb_count = IPCTNL_MSG_MAX, | |
2042 | .cb = ctnl_cb, | |
2043 | }; | |
2044 | ||
7c8d4cb4 | 2045 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
2046 | .name = "conntrack_expect", |
2047 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
2048 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
2049 | .cb = ctnl_exp_cb, | |
2050 | }; | |
2051 | ||
d2483dde | 2052 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 2053 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 2054 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
2055 | |
2056 | static int __init ctnetlink_init(void) | |
2057 | { | |
2058 | int ret; | |
2059 | ||
654d0fbd | 2060 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
c1d10adb PNA |
2061 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
2062 | if (ret < 0) { | |
654d0fbd | 2063 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
c1d10adb PNA |
2064 | goto err_out; |
2065 | } | |
2066 | ||
2067 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
2068 | if (ret < 0) { | |
654d0fbd | 2069 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
c1d10adb PNA |
2070 | goto err_unreg_subsys; |
2071 | } | |
2072 | ||
2073 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2074 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
2075 | if (ret < 0) { | |
654d0fbd | 2076 | pr_err("ctnetlink_init: cannot register notifier.\n"); |
c1d10adb PNA |
2077 | goto err_unreg_exp_subsys; |
2078 | } | |
2079 | ||
6823645d | 2080 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb | 2081 | if (ret < 0) { |
654d0fbd | 2082 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); |
c1d10adb PNA |
2083 | goto err_unreg_notifier; |
2084 | } | |
2085 | #endif | |
2086 | ||
2087 | return 0; | |
2088 | ||
2089 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2090 | err_unreg_notifier: | |
2091 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
2092 | err_unreg_exp_subsys: | |
2093 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
2094 | #endif | |
2095 | err_unreg_subsys: | |
2096 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
2097 | err_out: | |
2098 | return ret; | |
2099 | } | |
2100 | ||
2101 | static void __exit ctnetlink_exit(void) | |
2102 | { | |
654d0fbd | 2103 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
c1d10adb PNA |
2104 | |
2105 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 2106 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
2107 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
2108 | #endif | |
2109 | ||
2110 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
2111 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
c1d10adb PNA |
2112 | } |
2113 | ||
2114 | module_init(ctnetlink_init); | |
2115 | module_exit(ctnetlink_exit); |