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Commit | Line | Data |
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c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
0adf9d67 | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/netlink.h> | |
28 | #include <linux/spinlock.h> | |
40a839fd | 29 | #include <linux/interrupt.h> |
c1d10adb PNA |
30 | #include <linux/notifier.h> |
31 | ||
32 | #include <linux/netfilter.h> | |
dc5fc579 | 33 | #include <net/netlink.h> |
c1d10adb PNA |
34 | #include <net/netfilter/nf_conntrack.h> |
35 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 36 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
37 | #include <net/netfilter/nf_conntrack_helper.h> |
38 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 39 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 40 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 41 | #include <net/netfilter/nf_conntrack_acct.h> |
5b1158e9 JK |
42 | #ifdef CONFIG_NF_NAT_NEEDED |
43 | #include <net/netfilter/nf_nat_core.h> | |
44 | #include <net/netfilter/nf_nat_protocol.h> | |
45 | #endif | |
c1d10adb PNA |
46 | |
47 | #include <linux/netfilter/nfnetlink.h> | |
48 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
49 | ||
50 | MODULE_LICENSE("GPL"); | |
51 | ||
dc808fe2 | 52 | static char __initdata version[] = "0.93"; |
c1d10adb | 53 | |
c1d10adb | 54 | static inline int |
601e68e1 | 55 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 56 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 57 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 58 | { |
c1d10adb | 59 | int ret = 0; |
df6fb868 | 60 | struct nlattr *nest_parms; |
c1d10adb | 61 | |
df6fb868 PM |
62 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
63 | if (!nest_parms) | |
64 | goto nla_put_failure; | |
77236b6e | 65 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 66 | |
fdf70832 PM |
67 | if (likely(l4proto->tuple_to_nlattr)) |
68 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 69 | |
df6fb868 | 70 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
71 | |
72 | return ret; | |
73 | ||
df6fb868 | 74 | nla_put_failure: |
c1d10adb PNA |
75 | return -1; |
76 | } | |
77 | ||
78 | static inline int | |
1cde6436 PNA |
79 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
80 | const struct nf_conntrack_tuple *tuple, | |
81 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 82 | { |
c1d10adb | 83 | int ret = 0; |
df6fb868 PM |
84 | struct nlattr *nest_parms; |
85 | ||
86 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
87 | if (!nest_parms) | |
88 | goto nla_put_failure; | |
1cde6436 | 89 | |
fdf70832 PM |
90 | if (likely(l3proto->tuple_to_nlattr)) |
91 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 92 | |
df6fb868 | 93 | nla_nest_end(skb, nest_parms); |
c1d10adb | 94 | |
1cde6436 PNA |
95 | return ret; |
96 | ||
df6fb868 | 97 | nla_put_failure: |
1cde6436 PNA |
98 | return -1; |
99 | } | |
100 | ||
bb5cf80e | 101 | static int |
1cde6436 PNA |
102 | ctnetlink_dump_tuples(struct sk_buff *skb, |
103 | const struct nf_conntrack_tuple *tuple) | |
104 | { | |
105 | int ret; | |
106 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 107 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 108 | |
528a3a6f | 109 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 110 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
111 | |
112 | if (unlikely(ret < 0)) | |
113 | return ret; | |
114 | ||
528a3a6f | 115 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 116 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
117 | |
118 | return ret; | |
c1d10adb PNA |
119 | } |
120 | ||
121 | static inline int | |
122 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
123 | { | |
77236b6e | 124 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
125 | return 0; |
126 | ||
df6fb868 | 127 | nla_put_failure: |
c1d10adb PNA |
128 | return -1; |
129 | } | |
130 | ||
131 | static inline int | |
132 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
133 | { | |
77236b6e | 134 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 135 | |
77236b6e | 136 | if (timeout < 0) |
c1d10adb | 137 | timeout = 0; |
601e68e1 | 138 | |
77236b6e | 139 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
140 | return 0; |
141 | ||
df6fb868 | 142 | nla_put_failure: |
c1d10adb PNA |
143 | return -1; |
144 | } | |
145 | ||
146 | static inline int | |
147 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
148 | { | |
5e8fbe2a | 149 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 150 | struct nlattr *nest_proto; |
c1d10adb PNA |
151 | int ret; |
152 | ||
528a3a6f PNA |
153 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
154 | if (!l4proto->to_nlattr) | |
c1d10adb | 155 | return 0; |
601e68e1 | 156 | |
df6fb868 PM |
157 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
158 | if (!nest_proto) | |
159 | goto nla_put_failure; | |
c1d10adb | 160 | |
fdf70832 | 161 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 162 | |
df6fb868 | 163 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
164 | |
165 | return ret; | |
166 | ||
df6fb868 | 167 | nla_put_failure: |
c1d10adb PNA |
168 | return -1; |
169 | } | |
170 | ||
171 | static inline int | |
172 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
173 | { | |
df6fb868 | 174 | struct nlattr *nest_helper; |
dc808fe2 | 175 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 176 | struct nf_conntrack_helper *helper; |
c1d10adb | 177 | |
3c158f7f | 178 | if (!help) |
c1d10adb | 179 | return 0; |
601e68e1 | 180 | |
3c158f7f PM |
181 | helper = rcu_dereference(help->helper); |
182 | if (!helper) | |
183 | goto out; | |
184 | ||
df6fb868 PM |
185 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
186 | if (!nest_helper) | |
187 | goto nla_put_failure; | |
77236b6e | 188 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 189 | |
fdf70832 PM |
190 | if (helper->to_nlattr) |
191 | helper->to_nlattr(skb, ct); | |
c1d10adb | 192 | |
df6fb868 | 193 | nla_nest_end(skb, nest_helper); |
3c158f7f | 194 | out: |
c1d10adb PNA |
195 | return 0; |
196 | ||
df6fb868 | 197 | nla_put_failure: |
c1d10adb PNA |
198 | return -1; |
199 | } | |
200 | ||
bb5cf80e | 201 | static int |
c1d10adb PNA |
202 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
203 | enum ip_conntrack_dir dir) | |
204 | { | |
205 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 206 | struct nlattr *nest_count; |
58401572 KPO |
207 | const struct nf_conn_counter *acct; |
208 | ||
209 | acct = nf_conn_acct_find(ct); | |
210 | if (!acct) | |
211 | return 0; | |
c1d10adb | 212 | |
df6fb868 PM |
213 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
214 | if (!nest_count) | |
215 | goto nla_put_failure; | |
216 | ||
58401572 KPO |
217 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
218 | cpu_to_be64(acct[dir].packets)); | |
219 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
220 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 221 | |
df6fb868 | 222 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
223 | |
224 | return 0; | |
225 | ||
df6fb868 | 226 | nla_put_failure: |
c1d10adb PNA |
227 | return -1; |
228 | } | |
c1d10adb PNA |
229 | |
230 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
231 | static inline int | |
232 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
233 | { | |
77236b6e | 234 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
235 | return 0; |
236 | ||
df6fb868 | 237 | nla_put_failure: |
c1d10adb PNA |
238 | return -1; |
239 | } | |
240 | #else | |
241 | #define ctnetlink_dump_mark(a, b) (0) | |
242 | #endif | |
243 | ||
37fccd85 PNA |
244 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
245 | static inline int | |
246 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
247 | { | |
77236b6e | 248 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
249 | return 0; |
250 | ||
251 | nla_put_failure: | |
252 | return -1; | |
253 | } | |
254 | #else | |
255 | #define ctnetlink_dump_secmark(a, b) (0) | |
256 | #endif | |
257 | ||
0f417ce9 PNA |
258 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
259 | ||
260 | static inline int | |
261 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
262 | { | |
263 | struct nlattr *nest_parms; | |
264 | ||
265 | if (!(ct->status & IPS_EXPECTED)) | |
266 | return 0; | |
267 | ||
268 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
269 | if (!nest_parms) | |
270 | goto nla_put_failure; | |
271 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
272 | goto nla_put_failure; | |
273 | nla_nest_end(skb, nest_parms); | |
274 | ||
275 | return 0; | |
276 | ||
277 | nla_put_failure: | |
278 | return -1; | |
279 | } | |
280 | ||
13eae15a | 281 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 282 | static int |
13eae15a PNA |
283 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
284 | { | |
13eae15a PNA |
285 | struct nlattr *nest_parms; |
286 | ||
287 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
288 | if (!nest_parms) | |
289 | goto nla_put_failure; | |
290 | ||
77236b6e PM |
291 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
292 | htonl(natseq->correction_pos)); | |
293 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
294 | htonl(natseq->offset_before)); | |
295 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
296 | htonl(natseq->offset_after)); | |
13eae15a PNA |
297 | |
298 | nla_nest_end(skb, nest_parms); | |
299 | ||
300 | return 0; | |
301 | ||
302 | nla_put_failure: | |
303 | return -1; | |
304 | } | |
305 | ||
306 | static inline int | |
307 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
308 | { | |
309 | struct nf_nat_seq *natseq; | |
310 | struct nf_conn_nat *nat = nfct_nat(ct); | |
311 | ||
312 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
313 | return 0; | |
314 | ||
315 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
316 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
317 | return -1; | |
318 | ||
319 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
320 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
321 | return -1; | |
322 | ||
323 | return 0; | |
324 | } | |
325 | #else | |
326 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
327 | #endif | |
328 | ||
c1d10adb PNA |
329 | static inline int |
330 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
331 | { | |
77236b6e | 332 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
333 | return 0; |
334 | ||
df6fb868 | 335 | nla_put_failure: |
c1d10adb PNA |
336 | return -1; |
337 | } | |
338 | ||
339 | static inline int | |
340 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
341 | { | |
77236b6e | 342 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
343 | return 0; |
344 | ||
df6fb868 | 345 | nla_put_failure: |
c1d10adb PNA |
346 | return -1; |
347 | } | |
348 | ||
349 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) | |
350 | ||
351 | static int | |
352 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 353 | int event, const struct nf_conn *ct) |
c1d10adb PNA |
354 | { |
355 | struct nlmsghdr *nlh; | |
356 | struct nfgenmsg *nfmsg; | |
df6fb868 | 357 | struct nlattr *nest_parms; |
27a884dc | 358 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
359 | |
360 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
361 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
362 | nfmsg = NLMSG_DATA(nlh); | |
363 | ||
8b0a231d | 364 | nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0; |
5e8fbe2a | 365 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
366 | nfmsg->version = NFNETLINK_V0; |
367 | nfmsg->res_id = 0; | |
368 | ||
df6fb868 PM |
369 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
370 | if (!nest_parms) | |
371 | goto nla_put_failure; | |
c1d10adb | 372 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
373 | goto nla_put_failure; |
374 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 375 | |
df6fb868 PM |
376 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
377 | if (!nest_parms) | |
378 | goto nla_put_failure; | |
c1d10adb | 379 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
380 | goto nla_put_failure; |
381 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
382 | |
383 | if (ctnetlink_dump_status(skb, ct) < 0 || | |
384 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
385 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
386 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
387 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
388 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
389 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 390 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 391 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 392 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 393 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 394 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 395 | goto nla_put_failure; |
c1d10adb | 396 | |
27a884dc | 397 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
398 | return skb->len; |
399 | ||
400 | nlmsg_failure: | |
df6fb868 | 401 | nla_put_failure: |
dc5fc579 | 402 | nlmsg_trim(skb, b); |
c1d10adb PNA |
403 | return -1; |
404 | } | |
405 | ||
406 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2732c4e4 HE |
407 | /* |
408 | * The general structure of a ctnetlink event is | |
409 | * | |
410 | * CTA_TUPLE_ORIG | |
411 | * <l3/l4-proto-attributes> | |
412 | * CTA_TUPLE_REPLY | |
413 | * <l3/l4-proto-attributes> | |
414 | * CTA_ID | |
415 | * ... | |
416 | * CTA_PROTOINFO | |
417 | * <l4-proto-attributes> | |
418 | * CTA_TUPLE_MASTER | |
419 | * <l3/l4-proto-attributes> | |
420 | * | |
421 | * Therefore the formular is | |
422 | * | |
423 | * size = sizeof(headers) + sizeof(generic_nlas) + 3 * sizeof(tuple_nlas) | |
424 | * + sizeof(protoinfo_nlas) | |
425 | */ | |
426 | static struct sk_buff * | |
427 | ctnetlink_alloc_skb(const struct nf_conntrack_tuple *tuple, gfp_t gfp) | |
428 | { | |
429 | struct nf_conntrack_l3proto *l3proto; | |
430 | struct nf_conntrack_l4proto *l4proto; | |
431 | int len; | |
432 | ||
433 | #define NLA_TYPE_SIZE(type) nla_total_size(sizeof(type)) | |
434 | ||
435 | /* proto independant part */ | |
436 | len = NLMSG_SPACE(sizeof(struct nfgenmsg)) | |
437 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
438 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
439 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
440 | + 3 * NLA_TYPE_SIZE(u_int8_t) /* CTA_PROTO_NUM */ | |
441 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_ID */ | |
442 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_STATUS */ | |
d271e8bd | 443 | #ifdef CONFIG_NF_CT_ACCT |
2732c4e4 HE |
444 | + 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
445 | + 2 * NLA_TYPE_SIZE(uint64_t) /* CTA_COUNTERS_PACKETS */ | |
446 | + 2 * NLA_TYPE_SIZE(uint64_t) /* CTA_COUNTERS_BYTES */ | |
d271e8bd | 447 | #endif |
2732c4e4 HE |
448 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_TIMEOUT */ |
449 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
450 | + nla_total_size(0) /* CTA_HELP */ | |
451 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
d271e8bd | 452 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
2732c4e4 | 453 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_SECMARK */ |
d271e8bd HE |
454 | #endif |
455 | #ifdef CONFIG_NF_NAT_NEEDED | |
2732c4e4 HE |
456 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
457 | + 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_POS */ | |
458 | + 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_BEFORE */ | |
459 | + 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_AFTER */ | |
d271e8bd HE |
460 | #endif |
461 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
462 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_MARK */ | |
463 | #endif | |
464 | ; | |
2732c4e4 HE |
465 | |
466 | #undef NLA_TYPE_SIZE | |
467 | ||
468 | rcu_read_lock(); | |
469 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
470 | len += l3proto->nla_size; | |
471 | ||
472 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
473 | len += l4proto->nla_size; | |
474 | rcu_read_unlock(); | |
475 | ||
476 | return alloc_skb(len, gfp); | |
477 | } | |
478 | ||
c1d10adb | 479 | static int ctnetlink_conntrack_event(struct notifier_block *this, |
601e68e1 | 480 | unsigned long events, void *ptr) |
c1d10adb PNA |
481 | { |
482 | struct nlmsghdr *nlh; | |
483 | struct nfgenmsg *nfmsg; | |
df6fb868 | 484 | struct nlattr *nest_parms; |
19abb7b0 PNA |
485 | struct nf_ct_event *item = (struct nf_ct_event *)ptr; |
486 | struct nf_conn *ct = item->ct; | |
c1d10adb PNA |
487 | struct sk_buff *skb; |
488 | unsigned int type; | |
27a884dc | 489 | sk_buff_data_t b; |
c1d10adb PNA |
490 | unsigned int flags = 0, group; |
491 | ||
492 | /* ignore our fake conntrack entry */ | |
493 | if (ct == &nf_conntrack_untracked) | |
494 | return NOTIFY_DONE; | |
495 | ||
496 | if (events & IPCT_DESTROY) { | |
497 | type = IPCTNL_MSG_CT_DELETE; | |
498 | group = NFNLGRP_CONNTRACK_DESTROY; | |
499 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { | |
500 | type = IPCTNL_MSG_CT_NEW; | |
501 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 502 | group = NFNLGRP_CONNTRACK_NEW; |
1a31526b | 503 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
c1d10adb PNA |
504 | type = IPCTNL_MSG_CT_NEW; |
505 | group = NFNLGRP_CONNTRACK_UPDATE; | |
506 | } else | |
507 | return NOTIFY_DONE; | |
a2427692 | 508 | |
1f9da256 | 509 | if (!item->report && !nfnetlink_has_listeners(group)) |
a2427692 PM |
510 | return NOTIFY_DONE; |
511 | ||
2732c4e4 | 512 | skb = ctnetlink_alloc_skb(tuple(ct, IP_CT_DIR_ORIGINAL), GFP_ATOMIC); |
c1d10adb | 513 | if (!skb) |
150ace0d | 514 | goto errout; |
c1d10adb PNA |
515 | |
516 | b = skb->tail; | |
517 | ||
518 | type |= NFNL_SUBSYS_CTNETLINK << 8; | |
19abb7b0 | 519 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
520 | nfmsg = NLMSG_DATA(nlh); |
521 | ||
522 | nlh->nlmsg_flags = flags; | |
5e8fbe2a | 523 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
524 | nfmsg->version = NFNETLINK_V0; |
525 | nfmsg->res_id = 0; | |
526 | ||
528a3a6f | 527 | rcu_read_lock(); |
df6fb868 PM |
528 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
529 | if (!nest_parms) | |
530 | goto nla_put_failure; | |
c1d10adb | 531 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
532 | goto nla_put_failure; |
533 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 534 | |
df6fb868 PM |
535 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
536 | if (!nest_parms) | |
537 | goto nla_put_failure; | |
c1d10adb | 538 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
539 | goto nla_put_failure; |
540 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 541 | |
1eedf699 EL |
542 | if (ctnetlink_dump_id(skb, ct) < 0) |
543 | goto nla_put_failure; | |
544 | ||
e57dce60 FH |
545 | if (ctnetlink_dump_status(skb, ct) < 0) |
546 | goto nla_put_failure; | |
547 | ||
7b621c1e PNA |
548 | if (events & IPCT_DESTROY) { |
549 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
550 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 551 | goto nla_put_failure; |
7b621c1e | 552 | } else { |
7b621c1e | 553 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 554 | goto nla_put_failure; |
7b621c1e PNA |
555 | |
556 | if (events & IPCT_PROTOINFO | |
557 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 558 | goto nla_put_failure; |
7b621c1e PNA |
559 | |
560 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
561 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 562 | goto nla_put_failure; |
7b621c1e | 563 | |
37fccd85 PNA |
564 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
565 | if ((events & IPCT_SECMARK || ct->secmark) | |
566 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
567 | goto nla_put_failure; | |
568 | #endif | |
7b621c1e | 569 | |
0f417ce9 PNA |
570 | if (events & IPCT_RELATED && |
571 | ctnetlink_dump_master(skb, ct) < 0) | |
572 | goto nla_put_failure; | |
573 | ||
13eae15a PNA |
574 | if (events & IPCT_NATSEQADJ && |
575 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
576 | goto nla_put_failure; | |
7b621c1e | 577 | } |
b9a37e0c | 578 | |
a83099a6 EL |
579 | #ifdef CONFIG_NF_CONNTRACK_MARK |
580 | if ((events & IPCT_MARK || ct->mark) | |
581 | && ctnetlink_dump_mark(skb, ct) < 0) | |
582 | goto nla_put_failure; | |
583 | #endif | |
528a3a6f | 584 | rcu_read_unlock(); |
a83099a6 | 585 | |
c1d10adb | 586 | nlh->nlmsg_len = skb->tail - b; |
19abb7b0 | 587 | nfnetlink_send(skb, item->pid, group, item->report); |
c1d10adb PNA |
588 | return NOTIFY_DONE; |
589 | ||
df6fb868 | 590 | nla_put_failure: |
528a3a6f PNA |
591 | rcu_read_unlock(); |
592 | nlmsg_failure: | |
c1d10adb | 593 | kfree_skb(skb); |
150ace0d PNA |
594 | errout: |
595 | nfnetlink_set_err(0, group, -ENOBUFS); | |
c1d10adb PNA |
596 | return NOTIFY_DONE; |
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 | { | |
89f2e218 | 610 | struct nf_conn *ct, *last; |
c1d10adb | 611 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 612 | struct hlist_nulls_node *n; |
87711cb8 PNA |
613 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
614 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 615 | |
76507f69 | 616 | rcu_read_lock(); |
d205dc40 | 617 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
618 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
619 | restart: | |
ea781f19 ED |
620 | hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
621 | hnnode) { | |
5b1158e9 | 622 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
623 | continue; |
624 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
625 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
626 | continue; | |
87711cb8 PNA |
627 | /* Dump entries of a given L3 protocol number. |
628 | * If it is not specified, ie. l3proto == 0, | |
629 | * then dump everything. */ | |
5e8fbe2a | 630 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 631 | goto releasect; |
d205dc40 PM |
632 | if (cb->args[1]) { |
633 | if (ct != last) | |
ea781f19 | 634 | goto releasect; |
d205dc40 | 635 | cb->args[1] = 0; |
89f2e218 | 636 | } |
c1d10adb | 637 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 638 | cb->nlh->nlmsg_seq, |
8b0a231d | 639 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
89f2e218 | 640 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 641 | goto out; |
89f2e218 | 642 | } |
58401572 | 643 | |
01f34848 | 644 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
645 | IPCTNL_MSG_CT_GET_CTRZERO) { |
646 | struct nf_conn_counter *acct; | |
647 | ||
648 | acct = nf_conn_acct_find(ct); | |
649 | if (acct) | |
650 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
651 | } | |
ea781f19 ED |
652 | releasect: |
653 | nf_ct_put(ct); | |
89f2e218 | 654 | } |
d205dc40 | 655 | if (cb->args[1]) { |
89f2e218 PM |
656 | cb->args[1] = 0; |
657 | goto restart; | |
c1d10adb PNA |
658 | } |
659 | } | |
89f2e218 | 660 | out: |
76507f69 | 661 | rcu_read_unlock(); |
d205dc40 PM |
662 | if (last) |
663 | nf_ct_put(last); | |
c1d10adb | 664 | |
c1d10adb PNA |
665 | return skb->len; |
666 | } | |
667 | ||
c1d10adb | 668 | static inline int |
df6fb868 | 669 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 670 | { |
df6fb868 | 671 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
672 | struct nf_conntrack_l3proto *l3proto; |
673 | int ret = 0; | |
674 | ||
df6fb868 | 675 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 676 | |
cd91566e FW |
677 | rcu_read_lock(); |
678 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 679 | |
f73e924c PM |
680 | if (likely(l3proto->nlattr_to_tuple)) { |
681 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
682 | l3proto->nla_policy); | |
683 | if (ret == 0) | |
684 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
685 | } | |
c1d10adb | 686 | |
cd91566e | 687 | rcu_read_unlock(); |
c1d10adb | 688 | |
c1d10adb PNA |
689 | return ret; |
690 | } | |
691 | ||
f73e924c PM |
692 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
693 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
694 | }; |
695 | ||
696 | static inline int | |
df6fb868 | 697 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
698 | struct nf_conntrack_tuple *tuple) |
699 | { | |
df6fb868 | 700 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 701 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
702 | int ret = 0; |
703 | ||
f73e924c PM |
704 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
705 | if (ret < 0) | |
706 | return ret; | |
c1d10adb | 707 | |
df6fb868 | 708 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 709 | return -EINVAL; |
77236b6e | 710 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 711 | |
cd91566e FW |
712 | rcu_read_lock(); |
713 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 714 | |
f73e924c PM |
715 | if (likely(l4proto->nlattr_to_tuple)) { |
716 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
717 | l4proto->nla_policy); | |
718 | if (ret == 0) | |
719 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
720 | } | |
c1d10adb | 721 | |
cd91566e | 722 | rcu_read_unlock(); |
601e68e1 | 723 | |
c1d10adb PNA |
724 | return ret; |
725 | } | |
726 | ||
bb5cf80e | 727 | static int |
df6fb868 | 728 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
729 | enum ctattr_tuple type, u_int8_t l3num) |
730 | { | |
df6fb868 | 731 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
732 | int err; |
733 | ||
c1d10adb PNA |
734 | memset(tuple, 0, sizeof(*tuple)); |
735 | ||
df6fb868 | 736 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 737 | |
df6fb868 | 738 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
739 | return -EINVAL; |
740 | ||
741 | tuple->src.l3num = l3num; | |
742 | ||
df6fb868 | 743 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
744 | if (err < 0) |
745 | return err; | |
746 | ||
df6fb868 | 747 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
748 | return -EINVAL; |
749 | ||
df6fb868 | 750 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
751 | if (err < 0) |
752 | return err; | |
753 | ||
754 | /* orig and expect tuples get DIR_ORIGINAL */ | |
755 | if (type == CTA_TUPLE_REPLY) | |
756 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
757 | else | |
758 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
759 | ||
c1d10adb PNA |
760 | return 0; |
761 | } | |
762 | ||
c1d10adb | 763 | static inline int |
df6fb868 | 764 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 765 | { |
df6fb868 | 766 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 767 | |
df6fb868 | 768 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 769 | |
df6fb868 | 770 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
771 | return -EINVAL; |
772 | ||
df6fb868 | 773 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
774 | |
775 | return 0; | |
776 | } | |
777 | ||
f73e924c PM |
778 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
779 | [CTA_STATUS] = { .type = NLA_U32 }, | |
780 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
781 | [CTA_MARK] = { .type = NLA_U32 }, | |
782 | [CTA_USE] = { .type = NLA_U32 }, | |
783 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
784 | }; |
785 | ||
786 | static int | |
601e68e1 | 787 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 788 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
789 | { |
790 | struct nf_conntrack_tuple_hash *h; | |
791 | struct nf_conntrack_tuple tuple; | |
792 | struct nf_conn *ct; | |
793 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
794 | u_int8_t u3 = nfmsg->nfgen_family; | |
795 | int err = 0; | |
796 | ||
df6fb868 | 797 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 798 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 799 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
800 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
801 | else { | |
802 | /* Flush the whole table */ | |
19abb7b0 PNA |
803 | nf_conntrack_flush(&init_net, |
804 | NETLINK_CB(skb).pid, | |
805 | nlmsg_report(nlh)); | |
c1d10adb PNA |
806 | return 0; |
807 | } | |
808 | ||
809 | if (err < 0) | |
810 | return err; | |
811 | ||
400dad39 | 812 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 813 | if (!h) |
c1d10adb | 814 | return -ENOENT; |
c1d10adb PNA |
815 | |
816 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 817 | |
df6fb868 | 818 | if (cda[CTA_ID]) { |
77236b6e | 819 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 820 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
821 | nf_ct_put(ct); |
822 | return -ENOENT; | |
823 | } | |
601e68e1 | 824 | } |
c1d10adb | 825 | |
19abb7b0 PNA |
826 | nf_conntrack_event_report(IPCT_DESTROY, |
827 | ct, | |
828 | NETLINK_CB(skb).pid, | |
829 | nlmsg_report(nlh)); | |
830 | ||
831 | /* death_by_timeout would report the event again */ | |
832 | set_bit(IPS_DYING_BIT, &ct->status); | |
833 | ||
51091764 | 834 | nf_ct_kill(ct); |
c1d10adb | 835 | nf_ct_put(ct); |
c1d10adb PNA |
836 | |
837 | return 0; | |
838 | } | |
839 | ||
840 | static int | |
601e68e1 | 841 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 842 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
843 | { |
844 | struct nf_conntrack_tuple_hash *h; | |
845 | struct nf_conntrack_tuple tuple; | |
846 | struct nf_conn *ct; | |
847 | struct sk_buff *skb2 = NULL; | |
848 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
849 | u_int8_t u3 = nfmsg->nfgen_family; | |
850 | int err = 0; | |
851 | ||
58401572 | 852 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
853 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
854 | ctnetlink_done); | |
c1d10adb | 855 | |
df6fb868 | 856 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 857 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 858 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
859 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
860 | else | |
861 | return -EINVAL; | |
862 | ||
863 | if (err < 0) | |
864 | return err; | |
865 | ||
400dad39 | 866 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 867 | if (!h) |
c1d10adb | 868 | return -ENOENT; |
9ea8cfd6 | 869 | |
c1d10adb PNA |
870 | ct = nf_ct_tuplehash_to_ctrack(h); |
871 | ||
872 | err = -ENOMEM; | |
873 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
874 | if (!skb2) { | |
875 | nf_ct_put(ct); | |
876 | return -ENOMEM; | |
877 | } | |
c1d10adb | 878 | |
528a3a6f | 879 | rcu_read_lock(); |
601e68e1 | 880 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
8b0a231d | 881 | IPCTNL_MSG_CT_NEW, ct); |
528a3a6f | 882 | rcu_read_unlock(); |
c1d10adb PNA |
883 | nf_ct_put(ct); |
884 | if (err <= 0) | |
885 | goto free; | |
886 | ||
887 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
888 | if (err < 0) | |
889 | goto out; | |
890 | ||
c1d10adb PNA |
891 | return 0; |
892 | ||
893 | free: | |
894 | kfree_skb(skb2); | |
895 | out: | |
896 | return err; | |
897 | } | |
898 | ||
67671841 | 899 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
900 | static int |
901 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
902 | enum nf_nat_manip_type manip, | |
903 | struct nlattr *attr) | |
904 | { | |
905 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
906 | ||
907 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
908 | if (!parse_nat_setup) { | |
95a5afca | 909 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 910 | rcu_read_unlock(); |
748085fc | 911 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
912 | nfnl_unlock(); |
913 | if (request_module("nf-nat-ipv4") < 0) { | |
914 | nfnl_lock(); | |
748085fc | 915 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
916 | rcu_read_lock(); |
917 | return -EOPNOTSUPP; | |
918 | } | |
919 | nfnl_lock(); | |
748085fc | 920 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
921 | rcu_read_lock(); |
922 | if (nfnetlink_parse_nat_setup_hook) | |
923 | return -EAGAIN; | |
924 | #endif | |
925 | return -EOPNOTSUPP; | |
926 | } | |
927 | ||
928 | return parse_nat_setup(ct, manip, attr); | |
929 | } | |
67671841 | 930 | #endif |
e6a7d3c0 | 931 | |
bb5cf80e | 932 | static int |
df6fb868 | 933 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
934 | { |
935 | unsigned long d; | |
77236b6e | 936 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
937 | d = ct->status ^ status; |
938 | ||
939 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
940 | /* unchangeable */ | |
0adf9d67 | 941 | return -EBUSY; |
601e68e1 | 942 | |
c1d10adb PNA |
943 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
944 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 945 | return -EBUSY; |
601e68e1 | 946 | |
c1d10adb PNA |
947 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
948 | /* ASSURED bit can only be set */ | |
0adf9d67 | 949 | return -EBUSY; |
c1d10adb | 950 | |
c1d10adb PNA |
951 | /* Be careful here, modifying NAT bits can screw up things, |
952 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 953 | * nf_nat_range. */ |
c1d10adb PNA |
954 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
955 | return 0; | |
956 | } | |
957 | ||
e6a7d3c0 PNA |
958 | static int |
959 | ctnetlink_change_nat(struct nf_conn *ct, struct nlattr *cda[]) | |
960 | { | |
961 | #ifdef CONFIG_NF_NAT_NEEDED | |
962 | int ret; | |
963 | ||
964 | if (cda[CTA_NAT_DST]) { | |
965 | ret = ctnetlink_parse_nat_setup(ct, | |
966 | IP_NAT_MANIP_DST, | |
967 | cda[CTA_NAT_DST]); | |
968 | if (ret < 0) | |
969 | return ret; | |
970 | } | |
971 | if (cda[CTA_NAT_SRC]) { | |
972 | ret = ctnetlink_parse_nat_setup(ct, | |
973 | IP_NAT_MANIP_SRC, | |
974 | cda[CTA_NAT_SRC]); | |
975 | if (ret < 0) | |
976 | return ret; | |
977 | } | |
978 | return 0; | |
979 | #else | |
980 | return -EOPNOTSUPP; | |
981 | #endif | |
982 | } | |
c1d10adb PNA |
983 | |
984 | static inline int | |
df6fb868 | 985 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
986 | { |
987 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 988 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 989 | char *helpname = NULL; |
c1d10adb PNA |
990 | int err; |
991 | ||
c1d10adb PNA |
992 | /* don't change helper of sibling connections */ |
993 | if (ct->master) | |
0adf9d67 | 994 | return -EBUSY; |
c1d10adb | 995 | |
df6fb868 | 996 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
997 | if (err < 0) |
998 | return err; | |
999 | ||
df293bbb YK |
1000 | if (!strcmp(helpname, "")) { |
1001 | if (help && help->helper) { | |
c1d10adb PNA |
1002 | /* we had a helper before ... */ |
1003 | nf_ct_remove_expectations(ct); | |
3c158f7f | 1004 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 1005 | } |
df293bbb YK |
1006 | |
1007 | return 0; | |
c1d10adb | 1008 | } |
601e68e1 | 1009 | |
df293bbb | 1010 | helper = __nf_conntrack_helper_find_byname(helpname); |
226c0c0e PNA |
1011 | if (helper == NULL) { |
1012 | #ifdef CONFIG_MODULES | |
1013 | spin_unlock_bh(&nf_conntrack_lock); | |
1014 | ||
1015 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1016 | spin_lock_bh(&nf_conntrack_lock); | |
1017 | return -EOPNOTSUPP; | |
1018 | } | |
1019 | ||
1020 | spin_lock_bh(&nf_conntrack_lock); | |
1021 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1022 | if (helper) | |
1023 | return -EAGAIN; | |
1024 | #endif | |
0adf9d67 | 1025 | return -EOPNOTSUPP; |
226c0c0e | 1026 | } |
df293bbb | 1027 | |
ceceae1b YK |
1028 | if (help) { |
1029 | if (help->helper == helper) | |
1030 | return 0; | |
1031 | if (help->helper) | |
1032 | return -EBUSY; | |
1033 | /* need to zero data of old helper */ | |
1034 | memset(&help->help, 0, sizeof(help->help)); | |
1035 | } else { | |
fab00c5d | 1036 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
ceceae1b YK |
1037 | if (help == NULL) |
1038 | return -ENOMEM; | |
1039 | } | |
df293bbb | 1040 | |
3c158f7f | 1041 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
1042 | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static inline int | |
df6fb868 | 1047 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1048 | { |
77236b6e | 1049 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1050 | |
c1d10adb PNA |
1051 | if (!del_timer(&ct->timeout)) |
1052 | return -ETIME; | |
1053 | ||
1054 | ct->timeout.expires = jiffies + timeout * HZ; | |
1055 | add_timer(&ct->timeout); | |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | static inline int | |
df6fb868 | 1061 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1062 | { |
df6fb868 | 1063 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 1064 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1065 | int err = 0; |
1066 | ||
df6fb868 | 1067 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 1068 | |
cd91566e FW |
1069 | rcu_read_lock(); |
1070 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1071 | if (l4proto->from_nlattr) |
1072 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1073 | rcu_read_unlock(); |
c1d10adb PNA |
1074 | |
1075 | return err; | |
1076 | } | |
1077 | ||
13eae15a PNA |
1078 | #ifdef CONFIG_NF_NAT_NEEDED |
1079 | static inline int | |
1080 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1081 | { | |
1082 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1083 | ||
1084 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1085 | ||
1086 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1087 | return -EINVAL; | |
1088 | ||
1089 | natseq->correction_pos = | |
77236b6e | 1090 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1091 | |
1092 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1093 | return -EINVAL; | |
1094 | ||
1095 | natseq->offset_before = | |
77236b6e | 1096 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1097 | |
1098 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | natseq->offset_after = | |
77236b6e | 1102 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1103 | |
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | static int | |
1108 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1109 | { | |
1110 | int ret = 0; | |
1111 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1112 | ||
1113 | if (!nat) | |
1114 | return 0; | |
1115 | ||
1116 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1117 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1118 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1119 | if (ret < 0) | |
1120 | return ret; | |
1121 | ||
1122 | ct->status |= IPS_SEQ_ADJUST; | |
1123 | } | |
1124 | ||
1125 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1126 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1127 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1128 | if (ret < 0) | |
1129 | return ret; | |
1130 | ||
1131 | ct->status |= IPS_SEQ_ADJUST; | |
1132 | } | |
1133 | ||
1134 | return 0; | |
1135 | } | |
1136 | #endif | |
1137 | ||
c1d10adb | 1138 | static int |
df6fb868 | 1139 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1140 | { |
1141 | int err; | |
1142 | ||
e098360f PNA |
1143 | /* only allow NAT changes and master assignation for new conntracks */ |
1144 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1145 | return -EOPNOTSUPP; | |
1146 | ||
df6fb868 | 1147 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1148 | err = ctnetlink_change_helper(ct, cda); |
1149 | if (err < 0) | |
1150 | return err; | |
1151 | } | |
1152 | ||
df6fb868 | 1153 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1154 | err = ctnetlink_change_timeout(ct, cda); |
1155 | if (err < 0) | |
1156 | return err; | |
1157 | } | |
1158 | ||
df6fb868 | 1159 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1160 | err = ctnetlink_change_status(ct, cda); |
1161 | if (err < 0) | |
1162 | return err; | |
1163 | } | |
1164 | ||
df6fb868 | 1165 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1166 | err = ctnetlink_change_protoinfo(ct, cda); |
1167 | if (err < 0) | |
1168 | return err; | |
1169 | } | |
1170 | ||
bcd1e830 | 1171 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1172 | if (cda[CTA_MARK]) |
77236b6e | 1173 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1174 | #endif |
1175 | ||
13eae15a PNA |
1176 | #ifdef CONFIG_NF_NAT_NEEDED |
1177 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1178 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1179 | if (err < 0) | |
1180 | return err; | |
1181 | } | |
1182 | #endif | |
1183 | ||
c1d10adb PNA |
1184 | return 0; |
1185 | } | |
1186 | ||
f0a3c086 | 1187 | static struct nf_conn * |
df6fb868 | 1188 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1189 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1190 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1191 | u8 u3) |
c1d10adb PNA |
1192 | { |
1193 | struct nf_conn *ct; | |
1194 | int err = -EINVAL; | |
ceceae1b | 1195 | struct nf_conntrack_helper *helper; |
c1d10adb | 1196 | |
b54ad409 | 1197 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1198 | if (IS_ERR(ct)) |
f0a3c086 | 1199 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1200 | |
df6fb868 | 1201 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1202 | goto err1; |
77236b6e | 1203 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1204 | |
1205 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1206 | ct->status |= IPS_CONFIRMED; | |
1207 | ||
1575e7ea | 1208 | rcu_read_lock(); |
226c0c0e | 1209 | if (cda[CTA_HELP]) { |
29fe1b48 | 1210 | char *helpname = NULL; |
226c0c0e PNA |
1211 | |
1212 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1213 | if (err < 0) |
1214 | goto err2; | |
226c0c0e PNA |
1215 | |
1216 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1217 | if (helper == NULL) { | |
1218 | rcu_read_unlock(); | |
1219 | #ifdef CONFIG_MODULES | |
1220 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1221 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1222 | goto err1; |
226c0c0e PNA |
1223 | } |
1224 | ||
1225 | rcu_read_lock(); | |
1226 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1227 | if (helper) { | |
226c0c0e | 1228 | err = -EAGAIN; |
0f5b3e85 | 1229 | goto err2; |
226c0c0e PNA |
1230 | } |
1231 | rcu_read_unlock(); | |
1232 | #endif | |
1233 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1234 | goto err1; |
226c0c0e PNA |
1235 | } else { |
1236 | struct nf_conn_help *help; | |
1237 | ||
1238 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1239 | if (help == NULL) { | |
226c0c0e | 1240 | err = -ENOMEM; |
0f5b3e85 | 1241 | goto err2; |
226c0c0e PNA |
1242 | } |
1243 | ||
1244 | /* not in hash table yet so not strictly necessary */ | |
1245 | rcu_assign_pointer(help->helper, helper); | |
1246 | } | |
1247 | } else { | |
1248 | /* try an implicit helper assignation */ | |
1249 | err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); | |
0f5b3e85 PM |
1250 | if (err < 0) |
1251 | goto err2; | |
1575e7ea PNA |
1252 | } |
1253 | ||
df6fb868 | 1254 | if (cda[CTA_STATUS]) { |
bbb3357d | 1255 | err = ctnetlink_change_status(ct, cda); |
0f5b3e85 PM |
1256 | if (err < 0) |
1257 | goto err2; | |
e6a7d3c0 PNA |
1258 | } |
1259 | ||
1260 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { | |
1261 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1262 | if (err < 0) |
1263 | goto err2; | |
bbb3357d | 1264 | } |
c1d10adb | 1265 | |
c969aa7d PNA |
1266 | #ifdef CONFIG_NF_NAT_NEEDED |
1267 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1268 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1269 | if (err < 0) |
1270 | goto err2; | |
c969aa7d PNA |
1271 | } |
1272 | #endif | |
1273 | ||
df6fb868 | 1274 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1275 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1276 | if (err < 0) |
1277 | goto err2; | |
c1d10adb PNA |
1278 | } |
1279 | ||
3ec19255 | 1280 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
58401572 | 1281 | |
bcd1e830 | 1282 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1283 | if (cda[CTA_MARK]) |
77236b6e | 1284 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1285 | #endif |
1286 | ||
5faa1f4c | 1287 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1288 | if (cda[CTA_TUPLE_MASTER]) { |
1289 | struct nf_conntrack_tuple master; | |
1290 | struct nf_conntrack_tuple_hash *master_h; | |
1291 | struct nf_conn *master_ct; | |
1292 | ||
1293 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1294 | if (err < 0) | |
0f5b3e85 | 1295 | goto err2; |
7ec47496 | 1296 | |
ea781f19 | 1297 | master_h = nf_conntrack_find_get(&init_net, &master); |
7ec47496 PNA |
1298 | if (master_h == NULL) { |
1299 | err = -ENOENT; | |
0f5b3e85 | 1300 | goto err2; |
7ec47496 PNA |
1301 | } |
1302 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1303 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1304 | ct->master = master_ct; |
f2a89004 | 1305 | } |
5faa1f4c | 1306 | |
c1d10adb PNA |
1307 | add_timer(&ct->timeout); |
1308 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1309 | rcu_read_unlock(); |
dafc741c | 1310 | |
f0a3c086 | 1311 | return ct; |
c1d10adb | 1312 | |
0f5b3e85 PM |
1313 | err2: |
1314 | rcu_read_unlock(); | |
1315 | err1: | |
c1d10adb | 1316 | nf_conntrack_free(ct); |
f0a3c086 | 1317 | return ERR_PTR(err); |
c1d10adb PNA |
1318 | } |
1319 | ||
601e68e1 YH |
1320 | static int |
1321 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1322 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1323 | { |
1324 | struct nf_conntrack_tuple otuple, rtuple; | |
1325 | struct nf_conntrack_tuple_hash *h = NULL; | |
1326 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1327 | u_int8_t u3 = nfmsg->nfgen_family; | |
1328 | int err = 0; | |
1329 | ||
df6fb868 | 1330 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1331 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1332 | if (err < 0) | |
1333 | return err; | |
1334 | } | |
1335 | ||
df6fb868 | 1336 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1337 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1338 | if (err < 0) | |
1339 | return err; | |
1340 | } | |
1341 | ||
f8ba1aff | 1342 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1343 | if (cda[CTA_TUPLE_ORIG]) |
400dad39 | 1344 | h = __nf_conntrack_find(&init_net, &otuple); |
df6fb868 | 1345 | else if (cda[CTA_TUPLE_REPLY]) |
400dad39 | 1346 | h = __nf_conntrack_find(&init_net, &rtuple); |
c1d10adb PNA |
1347 | |
1348 | if (h == NULL) { | |
c1d10adb | 1349 | err = -ENOENT; |
f0a3c086 PNA |
1350 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1351 | struct nf_conn *ct; | |
fecc1133 | 1352 | enum ip_conntrack_events events; |
5faa1f4c | 1353 | |
f0a3c086 PNA |
1354 | ct = ctnetlink_create_conntrack(cda, &otuple, |
1355 | &rtuple, u3); | |
1356 | if (IS_ERR(ct)) { | |
1357 | err = PTR_ERR(ct); | |
5faa1f4c PNA |
1358 | goto out_unlock; |
1359 | } | |
f0a3c086 PNA |
1360 | err = 0; |
1361 | nf_conntrack_get(&ct->ct_general); | |
1362 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1363 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1364 | events = IPCT_RELATED; | |
1365 | else | |
1366 | events = IPCT_NEW; | |
1367 | ||
1368 | nf_conntrack_event_report(IPCT_STATUS | | |
1369 | IPCT_HELPER | | |
1370 | IPCT_PROTOINFO | | |
1371 | IPCT_NATSEQADJ | | |
1372 | IPCT_MARK | events, | |
1373 | ct, NETLINK_CB(skb).pid, | |
1374 | nlmsg_report(nlh)); | |
f0a3c086 PNA |
1375 | nf_ct_put(ct); |
1376 | } else | |
1377 | spin_unlock_bh(&nf_conntrack_lock); | |
5faa1f4c | 1378 | |
c1d10adb PNA |
1379 | return err; |
1380 | } | |
1381 | /* implicit 'else' */ | |
1382 | ||
c1d10adb PNA |
1383 | /* We manipulate the conntrack inside the global conntrack table lock, |
1384 | * so there's no need to increase the refcount */ | |
c1d10adb | 1385 | err = -EEXIST; |
ff4ca827 | 1386 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1387 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1388 | ||
19abb7b0 PNA |
1389 | err = ctnetlink_change_conntrack(ct, cda); |
1390 | if (err == 0) { | |
1391 | nf_conntrack_get(&ct->ct_general); | |
1392 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1393 | nf_conntrack_event_report(IPCT_STATUS | |
1394 | IPCT_HELPER | | |
1395 | IPCT_PROTOINFO | | |
1396 | IPCT_NATSEQADJ | | |
1397 | IPCT_MARK, | |
1398 | ct, NETLINK_CB(skb).pid, | |
1399 | nlmsg_report(nlh)); | |
19abb7b0 PNA |
1400 | nf_ct_put(ct); |
1401 | } else | |
1402 | spin_unlock_bh(&nf_conntrack_lock); | |
1403 | ||
1404 | return err; | |
ff4ca827 | 1405 | } |
c1d10adb PNA |
1406 | |
1407 | out_unlock: | |
f8ba1aff | 1408 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1409 | return err; |
1410 | } | |
1411 | ||
601e68e1 YH |
1412 | /*********************************************************************** |
1413 | * EXPECT | |
1414 | ***********************************************************************/ | |
c1d10adb PNA |
1415 | |
1416 | static inline int | |
1417 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1418 | const struct nf_conntrack_tuple *tuple, | |
1419 | enum ctattr_expect type) | |
1420 | { | |
df6fb868 | 1421 | struct nlattr *nest_parms; |
601e68e1 | 1422 | |
df6fb868 PM |
1423 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1424 | if (!nest_parms) | |
1425 | goto nla_put_failure; | |
c1d10adb | 1426 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1427 | goto nla_put_failure; |
1428 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1429 | |
1430 | return 0; | |
1431 | ||
df6fb868 | 1432 | nla_put_failure: |
c1d10adb | 1433 | return -1; |
601e68e1 | 1434 | } |
c1d10adb | 1435 | |
1cde6436 PNA |
1436 | static inline int |
1437 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1438 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1439 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1440 | { |
1441 | int ret; | |
1442 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1443 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1444 | struct nf_conntrack_tuple m; |
df6fb868 | 1445 | struct nlattr *nest_parms; |
d4156e8c PM |
1446 | |
1447 | memset(&m, 0xFF, sizeof(m)); | |
1448 | m.src.u.all = mask->src.u.all; | |
1449 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1450 | ||
df6fb868 PM |
1451 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1452 | if (!nest_parms) | |
1453 | goto nla_put_failure; | |
1cde6436 | 1454 | |
528a3a6f | 1455 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1456 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1457 | |
1458 | if (unlikely(ret < 0)) | |
df6fb868 | 1459 | goto nla_put_failure; |
1cde6436 | 1460 | |
528a3a6f | 1461 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1462 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1463 | if (unlikely(ret < 0)) |
df6fb868 | 1464 | goto nla_put_failure; |
1cde6436 | 1465 | |
df6fb868 | 1466 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1467 | |
1468 | return 0; | |
1469 | ||
df6fb868 | 1470 | nla_put_failure: |
1cde6436 PNA |
1471 | return -1; |
1472 | } | |
1473 | ||
bb5cf80e | 1474 | static int |
c1d10adb | 1475 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1476 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1477 | { |
1478 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1479 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1480 | ||
1481 | if (timeout < 0) | |
1482 | timeout = 0; | |
c1d10adb PNA |
1483 | |
1484 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1485 | goto nla_put_failure; |
1cde6436 | 1486 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1487 | goto nla_put_failure; |
c1d10adb PNA |
1488 | if (ctnetlink_exp_dump_tuple(skb, |
1489 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1490 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1491 | goto nla_put_failure; |
601e68e1 | 1492 | |
d978e5da | 1493 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1494 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1495 | |
1496 | return 0; | |
601e68e1 | 1497 | |
df6fb868 | 1498 | nla_put_failure: |
c1d10adb PNA |
1499 | return -1; |
1500 | } | |
1501 | ||
1502 | static int | |
1503 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 1504 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1505 | { |
1506 | struct nlmsghdr *nlh; | |
1507 | struct nfgenmsg *nfmsg; | |
27a884dc | 1508 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1509 | |
1510 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1511 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1512 | nfmsg = NLMSG_DATA(nlh); | |
1513 | ||
8b0a231d | 1514 | nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
1515 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1516 | nfmsg->version = NFNETLINK_V0; | |
1517 | nfmsg->res_id = 0; | |
1518 | ||
1519 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1520 | goto nla_put_failure; |
c1d10adb | 1521 | |
27a884dc | 1522 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1523 | return skb->len; |
1524 | ||
1525 | nlmsg_failure: | |
df6fb868 | 1526 | nla_put_failure: |
dc5fc579 | 1527 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1528 | return -1; |
1529 | } | |
1530 | ||
1531 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1532 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1533 | unsigned long events, void *ptr) | |
1534 | { | |
1535 | struct nlmsghdr *nlh; | |
1536 | struct nfgenmsg *nfmsg; | |
19abb7b0 PNA |
1537 | struct nf_exp_event *item = (struct nf_exp_event *)ptr; |
1538 | struct nf_conntrack_expect *exp = item->exp; | |
c1d10adb PNA |
1539 | struct sk_buff *skb; |
1540 | unsigned int type; | |
27a884dc | 1541 | sk_buff_data_t b; |
c1d10adb PNA |
1542 | int flags = 0; |
1543 | ||
1544 | if (events & IPEXP_NEW) { | |
1545 | type = IPCTNL_MSG_EXP_NEW; | |
1546 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1547 | } else | |
1548 | return NOTIFY_DONE; | |
1549 | ||
1f9da256 PNA |
1550 | if (!item->report && |
1551 | !nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) | |
b3a27bfb PNA |
1552 | return NOTIFY_DONE; |
1553 | ||
c1d10adb PNA |
1554 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1555 | if (!skb) | |
150ace0d | 1556 | goto errout; |
c1d10adb PNA |
1557 | |
1558 | b = skb->tail; | |
1559 | ||
b633ad5f | 1560 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
19abb7b0 | 1561 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
1562 | nfmsg = NLMSG_DATA(nlh); |
1563 | ||
1564 | nlh->nlmsg_flags = flags; | |
1565 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1566 | nfmsg->version = NFNETLINK_V0; | |
1567 | nfmsg->res_id = 0; | |
1568 | ||
528a3a6f | 1569 | rcu_read_lock(); |
c1d10adb | 1570 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1571 | goto nla_put_failure; |
528a3a6f | 1572 | rcu_read_unlock(); |
c1d10adb PNA |
1573 | |
1574 | nlh->nlmsg_len = skb->tail - b; | |
19abb7b0 | 1575 | nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report); |
c1d10adb PNA |
1576 | return NOTIFY_DONE; |
1577 | ||
df6fb868 | 1578 | nla_put_failure: |
528a3a6f PNA |
1579 | rcu_read_unlock(); |
1580 | nlmsg_failure: | |
c1d10adb | 1581 | kfree_skb(skb); |
150ace0d PNA |
1582 | errout: |
1583 | nfnetlink_set_err(0, 0, -ENOBUFS); | |
c1d10adb PNA |
1584 | return NOTIFY_DONE; |
1585 | } | |
1586 | #endif | |
cf6994c2 PM |
1587 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1588 | { | |
31f15875 PM |
1589 | if (cb->args[1]) |
1590 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1591 | return 0; |
1592 | } | |
c1d10adb PNA |
1593 | |
1594 | static int | |
1595 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1596 | { | |
9b03f38d | 1597 | struct net *net = &init_net; |
cf6994c2 | 1598 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1599 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1600 | struct hlist_node *n; |
87711cb8 | 1601 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1602 | |
7d0742da | 1603 | rcu_read_lock(); |
31f15875 PM |
1604 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1605 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1606 | restart: |
9b03f38d | 1607 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1608 | hnode) { |
1609 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1610 | continue; |
31f15875 PM |
1611 | if (cb->args[1]) { |
1612 | if (exp != last) | |
1613 | continue; | |
1614 | cb->args[1] = 0; | |
1615 | } | |
8b0a231d PNA |
1616 | if (ctnetlink_exp_fill_info(skb, |
1617 | NETLINK_CB(cb->skb).pid, | |
31f15875 PM |
1618 | cb->nlh->nlmsg_seq, |
1619 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 1620 | exp) < 0) { |
7d0742da PM |
1621 | if (!atomic_inc_not_zero(&exp->use)) |
1622 | continue; | |
31f15875 PM |
1623 | cb->args[1] = (unsigned long)exp; |
1624 | goto out; | |
1625 | } | |
cf6994c2 | 1626 | } |
31f15875 PM |
1627 | if (cb->args[1]) { |
1628 | cb->args[1] = 0; | |
1629 | goto restart; | |
cf6994c2 PM |
1630 | } |
1631 | } | |
601e68e1 | 1632 | out: |
7d0742da | 1633 | rcu_read_unlock(); |
cf6994c2 PM |
1634 | if (last) |
1635 | nf_ct_expect_put(last); | |
c1d10adb | 1636 | |
c1d10adb PNA |
1637 | return skb->len; |
1638 | } | |
1639 | ||
f73e924c PM |
1640 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1641 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1642 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1643 | }; |
1644 | ||
1645 | static int | |
601e68e1 | 1646 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1647 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1648 | { |
1649 | struct nf_conntrack_tuple tuple; | |
1650 | struct nf_conntrack_expect *exp; | |
1651 | struct sk_buff *skb2; | |
1652 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1653 | u_int8_t u3 = nfmsg->nfgen_family; | |
1654 | int err = 0; | |
1655 | ||
c1d10adb | 1656 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1657 | return netlink_dump_start(ctnl, skb, nlh, |
1658 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1659 | ctnetlink_exp_done); |
c1d10adb PNA |
1660 | } |
1661 | ||
df6fb868 | 1662 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1663 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1664 | else | |
1665 | return -EINVAL; | |
1666 | ||
1667 | if (err < 0) | |
1668 | return err; | |
1669 | ||
9b03f38d | 1670 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1671 | if (!exp) |
1672 | return -ENOENT; | |
1673 | ||
df6fb868 | 1674 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1675 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1676 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1677 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1678 | return -ENOENT; |
1679 | } | |
601e68e1 | 1680 | } |
c1d10adb PNA |
1681 | |
1682 | err = -ENOMEM; | |
1683 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1684 | if (!skb2) | |
1685 | goto out; | |
4e9b8269 | 1686 | |
528a3a6f | 1687 | rcu_read_lock(); |
601e68e1 | 1688 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
8b0a231d | 1689 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 1690 | rcu_read_unlock(); |
c1d10adb PNA |
1691 | if (err <= 0) |
1692 | goto free; | |
1693 | ||
6823645d | 1694 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1695 | |
1696 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1697 | ||
1698 | free: | |
1699 | kfree_skb(skb2); | |
1700 | out: | |
6823645d | 1701 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1702 | return err; |
1703 | } | |
1704 | ||
1705 | static int | |
601e68e1 | 1706 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1707 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1708 | { |
31f15875 | 1709 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1710 | struct nf_conntrack_tuple tuple; |
1711 | struct nf_conntrack_helper *h; | |
1712 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1713 | struct hlist_node *n, *next; |
c1d10adb | 1714 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1715 | unsigned int i; |
c1d10adb PNA |
1716 | int err; |
1717 | ||
df6fb868 | 1718 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1719 | /* delete a single expect by tuple */ |
1720 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1721 | if (err < 0) | |
1722 | return err; | |
1723 | ||
1724 | /* bump usage count to 2 */ | |
9b03f38d | 1725 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1726 | if (!exp) |
1727 | return -ENOENT; | |
1728 | ||
df6fb868 | 1729 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1730 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1731 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1732 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1733 | return -ENOENT; |
1734 | } | |
1735 | } | |
1736 | ||
1737 | /* after list removal, usage count == 1 */ | |
6823645d | 1738 | nf_ct_unexpect_related(exp); |
601e68e1 | 1739 | /* have to put what we 'get' above. |
c1d10adb | 1740 | * after this line usage count == 0 */ |
6823645d | 1741 | nf_ct_expect_put(exp); |
df6fb868 PM |
1742 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1743 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1744 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1745 | |
1746 | /* delete all expectations for this helper */ | |
f8ba1aff | 1747 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1748 | h = __nf_conntrack_helper_find_byname(name); |
1749 | if (!h) { | |
f8ba1aff | 1750 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1751 | return -EOPNOTSUPP; |
c1d10adb | 1752 | } |
31f15875 PM |
1753 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1754 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1755 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1756 | hnode) { |
1757 | m_help = nfct_help(exp->master); | |
1758 | if (m_help->helper == h | |
1759 | && del_timer(&exp->timeout)) { | |
1760 | nf_ct_unlink_expect(exp); | |
1761 | nf_ct_expect_put(exp); | |
1762 | } | |
c1d10adb PNA |
1763 | } |
1764 | } | |
f8ba1aff | 1765 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1766 | } else { |
1767 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1768 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1769 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1770 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1771 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1772 | hnode) { |
1773 | if (del_timer(&exp->timeout)) { | |
1774 | nf_ct_unlink_expect(exp); | |
1775 | nf_ct_expect_put(exp); | |
1776 | } | |
c1d10adb PNA |
1777 | } |
1778 | } | |
f8ba1aff | 1779 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1780 | } |
1781 | ||
1782 | return 0; | |
1783 | } | |
1784 | static int | |
df6fb868 | 1785 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1786 | { |
1787 | return -EOPNOTSUPP; | |
1788 | } | |
1789 | ||
1790 | static int | |
19abb7b0 | 1791 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) |
c1d10adb PNA |
1792 | { |
1793 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1794 | struct nf_conntrack_tuple_hash *h = NULL; | |
1795 | struct nf_conntrack_expect *exp; | |
1796 | struct nf_conn *ct; | |
dc808fe2 | 1797 | struct nf_conn_help *help; |
c1d10adb PNA |
1798 | int err = 0; |
1799 | ||
c1d10adb PNA |
1800 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1801 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1802 | if (err < 0) | |
1803 | return err; | |
1804 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1805 | if (err < 0) | |
1806 | return err; | |
1807 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1808 | if (err < 0) | |
1809 | return err; | |
1810 | ||
1811 | /* Look for master conntrack of this expectation */ | |
400dad39 | 1812 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
c1d10adb PNA |
1813 | if (!h) |
1814 | return -ENOENT; | |
1815 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1816 | help = nfct_help(ct); |
c1d10adb | 1817 | |
dc808fe2 | 1818 | if (!help || !help->helper) { |
c1d10adb | 1819 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1820 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1821 | goto out; |
1822 | } | |
1823 | ||
6823645d | 1824 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1825 | if (!exp) { |
1826 | err = -ENOMEM; | |
1827 | goto out; | |
1828 | } | |
601e68e1 | 1829 | |
626ba8fb | 1830 | exp->class = 0; |
c1d10adb PNA |
1831 | exp->expectfn = NULL; |
1832 | exp->flags = 0; | |
1833 | exp->master = ct; | |
9457d851 | 1834 | exp->helper = NULL; |
c1d10adb | 1835 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1836 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1837 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1838 | |
19abb7b0 | 1839 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1840 | nf_ct_expect_put(exp); |
c1d10adb | 1841 | |
601e68e1 | 1842 | out: |
c1d10adb PNA |
1843 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1844 | return err; | |
1845 | } | |
1846 | ||
1847 | static int | |
1848 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1849 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1850 | { |
1851 | struct nf_conntrack_tuple tuple; | |
1852 | struct nf_conntrack_expect *exp; | |
1853 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1854 | u_int8_t u3 = nfmsg->nfgen_family; | |
1855 | int err = 0; | |
1856 | ||
df6fb868 PM |
1857 | if (!cda[CTA_EXPECT_TUPLE] |
1858 | || !cda[CTA_EXPECT_MASK] | |
1859 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1860 | return -EINVAL; |
1861 | ||
1862 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1863 | if (err < 0) | |
1864 | return err; | |
1865 | ||
f8ba1aff | 1866 | spin_lock_bh(&nf_conntrack_lock); |
9b03f38d | 1867 | exp = __nf_ct_expect_find(&init_net, &tuple); |
c1d10adb PNA |
1868 | |
1869 | if (!exp) { | |
f8ba1aff | 1870 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1871 | err = -ENOENT; |
19abb7b0 PNA |
1872 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1873 | err = ctnetlink_create_expect(cda, | |
1874 | u3, | |
1875 | NETLINK_CB(skb).pid, | |
1876 | nlmsg_report(nlh)); | |
1877 | } | |
c1d10adb PNA |
1878 | return err; |
1879 | } | |
1880 | ||
1881 | err = -EEXIST; | |
1882 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1883 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1884 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1885 | |
c1d10adb PNA |
1886 | return err; |
1887 | } | |
1888 | ||
1889 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1890 | static struct notifier_block ctnl_notifier = { | |
1891 | .notifier_call = ctnetlink_conntrack_event, | |
1892 | }; | |
1893 | ||
1894 | static struct notifier_block ctnl_notifier_exp = { | |
1895 | .notifier_call = ctnetlink_expect_event, | |
1896 | }; | |
1897 | #endif | |
1898 | ||
7c8d4cb4 | 1899 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1900 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1901 | .attr_count = CTA_MAX, |
1902 | .policy = ct_nla_policy }, | |
c1d10adb | 1903 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1904 | .attr_count = CTA_MAX, |
1905 | .policy = ct_nla_policy }, | |
c1d10adb | 1906 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1907 | .attr_count = CTA_MAX, |
1908 | .policy = ct_nla_policy }, | |
c1d10adb | 1909 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1910 | .attr_count = CTA_MAX, |
1911 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1912 | }; |
1913 | ||
7c8d4cb4 | 1914 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1915 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1916 | .attr_count = CTA_EXPECT_MAX, |
1917 | .policy = exp_nla_policy }, | |
c1d10adb | 1918 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1919 | .attr_count = CTA_EXPECT_MAX, |
1920 | .policy = exp_nla_policy }, | |
c1d10adb | 1921 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1922 | .attr_count = CTA_EXPECT_MAX, |
1923 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1924 | }; |
1925 | ||
7c8d4cb4 | 1926 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1927 | .name = "conntrack", |
1928 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1929 | .cb_count = IPCTNL_MSG_MAX, | |
1930 | .cb = ctnl_cb, | |
1931 | }; | |
1932 | ||
7c8d4cb4 | 1933 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1934 | .name = "conntrack_expect", |
1935 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1936 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1937 | .cb = ctnl_exp_cb, | |
1938 | }; | |
1939 | ||
d2483dde | 1940 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1941 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1942 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1943 | |
1944 | static int __init ctnetlink_init(void) | |
1945 | { | |
1946 | int ret; | |
1947 | ||
1948 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1949 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1950 | if (ret < 0) { | |
1951 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1952 | goto err_out; | |
1953 | } | |
1954 | ||
1955 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1956 | if (ret < 0) { | |
1957 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1958 | goto err_unreg_subsys; | |
1959 | } | |
1960 | ||
1961 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1962 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1963 | if (ret < 0) { | |
1964 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1965 | goto err_unreg_exp_subsys; | |
1966 | } | |
1967 | ||
6823645d | 1968 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1969 | if (ret < 0) { |
1970 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1971 | goto err_unreg_notifier; | |
1972 | } | |
1973 | #endif | |
1974 | ||
1975 | return 0; | |
1976 | ||
1977 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1978 | err_unreg_notifier: | |
1979 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1980 | err_unreg_exp_subsys: | |
1981 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1982 | #endif | |
1983 | err_unreg_subsys: | |
1984 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1985 | err_out: | |
1986 | return ret; | |
1987 | } | |
1988 | ||
1989 | static void __exit ctnetlink_exit(void) | |
1990 | { | |
1991 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1992 | ||
1993 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1994 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1995 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1996 | #endif | |
1997 | ||
1998 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1999 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
2000 | return; | |
2001 | } | |
2002 | ||
2003 | module_init(ctnetlink_init); | |
2004 | module_exit(ctnetlink_exit); |