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Commit | Line | Data |
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c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
0adf9d67 | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/netlink.h> | |
28 | #include <linux/spinlock.h> | |
40a839fd | 29 | #include <linux/interrupt.h> |
c1d10adb PNA |
30 | #include <linux/notifier.h> |
31 | ||
32 | #include <linux/netfilter.h> | |
dc5fc579 | 33 | #include <net/netlink.h> |
c1d10adb PNA |
34 | #include <net/netfilter/nf_conntrack.h> |
35 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 36 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
37 | #include <net/netfilter/nf_conntrack_helper.h> |
38 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 39 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 40 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 41 | #include <net/netfilter/nf_conntrack_acct.h> |
5b1158e9 JK |
42 | #ifdef CONFIG_NF_NAT_NEEDED |
43 | #include <net/netfilter/nf_nat_core.h> | |
44 | #include <net/netfilter/nf_nat_protocol.h> | |
45 | #endif | |
c1d10adb PNA |
46 | |
47 | #include <linux/netfilter/nfnetlink.h> | |
48 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
49 | ||
50 | MODULE_LICENSE("GPL"); | |
51 | ||
dc808fe2 | 52 | static char __initdata version[] = "0.93"; |
c1d10adb | 53 | |
c1d10adb | 54 | static inline int |
601e68e1 | 55 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 56 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 57 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 58 | { |
c1d10adb | 59 | int ret = 0; |
df6fb868 | 60 | struct nlattr *nest_parms; |
c1d10adb | 61 | |
df6fb868 PM |
62 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
63 | if (!nest_parms) | |
64 | goto nla_put_failure; | |
77236b6e | 65 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 66 | |
fdf70832 PM |
67 | if (likely(l4proto->tuple_to_nlattr)) |
68 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 69 | |
df6fb868 | 70 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
71 | |
72 | return ret; | |
73 | ||
df6fb868 | 74 | nla_put_failure: |
c1d10adb PNA |
75 | return -1; |
76 | } | |
77 | ||
78 | static inline int | |
1cde6436 PNA |
79 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
80 | const struct nf_conntrack_tuple *tuple, | |
81 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 82 | { |
c1d10adb | 83 | int ret = 0; |
df6fb868 PM |
84 | struct nlattr *nest_parms; |
85 | ||
86 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
87 | if (!nest_parms) | |
88 | goto nla_put_failure; | |
1cde6436 | 89 | |
fdf70832 PM |
90 | if (likely(l3proto->tuple_to_nlattr)) |
91 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 92 | |
df6fb868 | 93 | nla_nest_end(skb, nest_parms); |
c1d10adb | 94 | |
1cde6436 PNA |
95 | return ret; |
96 | ||
df6fb868 | 97 | nla_put_failure: |
1cde6436 PNA |
98 | return -1; |
99 | } | |
100 | ||
bb5cf80e | 101 | static int |
1cde6436 PNA |
102 | ctnetlink_dump_tuples(struct sk_buff *skb, |
103 | const struct nf_conntrack_tuple *tuple) | |
104 | { | |
105 | int ret; | |
106 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 107 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 108 | |
528a3a6f | 109 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 110 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
111 | |
112 | if (unlikely(ret < 0)) | |
113 | return ret; | |
114 | ||
528a3a6f | 115 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 116 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
117 | |
118 | return ret; | |
c1d10adb PNA |
119 | } |
120 | ||
121 | static inline int | |
122 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
123 | { | |
77236b6e | 124 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
125 | return 0; |
126 | ||
df6fb868 | 127 | nla_put_failure: |
c1d10adb PNA |
128 | return -1; |
129 | } | |
130 | ||
131 | static inline int | |
132 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
133 | { | |
77236b6e | 134 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 135 | |
77236b6e | 136 | if (timeout < 0) |
c1d10adb | 137 | timeout = 0; |
601e68e1 | 138 | |
77236b6e | 139 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
140 | return 0; |
141 | ||
df6fb868 | 142 | nla_put_failure: |
c1d10adb PNA |
143 | return -1; |
144 | } | |
145 | ||
146 | static inline int | |
147 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
148 | { | |
5e8fbe2a | 149 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 150 | struct nlattr *nest_proto; |
c1d10adb PNA |
151 | int ret; |
152 | ||
528a3a6f PNA |
153 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
154 | if (!l4proto->to_nlattr) | |
c1d10adb | 155 | return 0; |
601e68e1 | 156 | |
df6fb868 PM |
157 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
158 | if (!nest_proto) | |
159 | goto nla_put_failure; | |
c1d10adb | 160 | |
fdf70832 | 161 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 162 | |
df6fb868 | 163 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
164 | |
165 | return ret; | |
166 | ||
df6fb868 | 167 | nla_put_failure: |
c1d10adb PNA |
168 | return -1; |
169 | } | |
170 | ||
171 | static inline int | |
172 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
173 | { | |
df6fb868 | 174 | struct nlattr *nest_helper; |
dc808fe2 | 175 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 176 | struct nf_conntrack_helper *helper; |
c1d10adb | 177 | |
3c158f7f | 178 | if (!help) |
c1d10adb | 179 | return 0; |
601e68e1 | 180 | |
3c158f7f PM |
181 | helper = rcu_dereference(help->helper); |
182 | if (!helper) | |
183 | goto out; | |
184 | ||
df6fb868 PM |
185 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
186 | if (!nest_helper) | |
187 | goto nla_put_failure; | |
77236b6e | 188 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 189 | |
fdf70832 PM |
190 | if (helper->to_nlattr) |
191 | helper->to_nlattr(skb, ct); | |
c1d10adb | 192 | |
df6fb868 | 193 | nla_nest_end(skb, nest_helper); |
3c158f7f | 194 | out: |
c1d10adb PNA |
195 | return 0; |
196 | ||
df6fb868 | 197 | nla_put_failure: |
c1d10adb PNA |
198 | return -1; |
199 | } | |
200 | ||
bb5cf80e | 201 | static int |
c1d10adb PNA |
202 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
203 | enum ip_conntrack_dir dir) | |
204 | { | |
205 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 206 | struct nlattr *nest_count; |
58401572 KPO |
207 | const struct nf_conn_counter *acct; |
208 | ||
209 | acct = nf_conn_acct_find(ct); | |
210 | if (!acct) | |
211 | return 0; | |
c1d10adb | 212 | |
df6fb868 PM |
213 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
214 | if (!nest_count) | |
215 | goto nla_put_failure; | |
216 | ||
58401572 KPO |
217 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
218 | cpu_to_be64(acct[dir].packets)); | |
219 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
220 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 221 | |
df6fb868 | 222 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
223 | |
224 | return 0; | |
225 | ||
df6fb868 | 226 | nla_put_failure: |
c1d10adb PNA |
227 | return -1; |
228 | } | |
c1d10adb PNA |
229 | |
230 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
231 | static inline int | |
232 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
233 | { | |
77236b6e | 234 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
235 | return 0; |
236 | ||
df6fb868 | 237 | nla_put_failure: |
c1d10adb PNA |
238 | return -1; |
239 | } | |
240 | #else | |
241 | #define ctnetlink_dump_mark(a, b) (0) | |
242 | #endif | |
243 | ||
37fccd85 PNA |
244 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
245 | static inline int | |
246 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
247 | { | |
77236b6e | 248 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
249 | return 0; |
250 | ||
251 | nla_put_failure: | |
252 | return -1; | |
253 | } | |
254 | #else | |
255 | #define ctnetlink_dump_secmark(a, b) (0) | |
256 | #endif | |
257 | ||
0f417ce9 PNA |
258 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
259 | ||
260 | static inline int | |
261 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
262 | { | |
263 | struct nlattr *nest_parms; | |
264 | ||
265 | if (!(ct->status & IPS_EXPECTED)) | |
266 | return 0; | |
267 | ||
268 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
269 | if (!nest_parms) | |
270 | goto nla_put_failure; | |
271 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
272 | goto nla_put_failure; | |
273 | nla_nest_end(skb, nest_parms); | |
274 | ||
275 | return 0; | |
276 | ||
277 | nla_put_failure: | |
278 | return -1; | |
279 | } | |
280 | ||
13eae15a | 281 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 282 | static int |
13eae15a PNA |
283 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
284 | { | |
13eae15a PNA |
285 | struct nlattr *nest_parms; |
286 | ||
287 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
288 | if (!nest_parms) | |
289 | goto nla_put_failure; | |
290 | ||
77236b6e PM |
291 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
292 | htonl(natseq->correction_pos)); | |
293 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
294 | htonl(natseq->offset_before)); | |
295 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
296 | htonl(natseq->offset_after)); | |
13eae15a PNA |
297 | |
298 | nla_nest_end(skb, nest_parms); | |
299 | ||
300 | return 0; | |
301 | ||
302 | nla_put_failure: | |
303 | return -1; | |
304 | } | |
305 | ||
306 | static inline int | |
307 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
308 | { | |
309 | struct nf_nat_seq *natseq; | |
310 | struct nf_conn_nat *nat = nfct_nat(ct); | |
311 | ||
312 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
313 | return 0; | |
314 | ||
315 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
316 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
317 | return -1; | |
318 | ||
319 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
320 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
321 | return -1; | |
322 | ||
323 | return 0; | |
324 | } | |
325 | #else | |
326 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
327 | #endif | |
328 | ||
c1d10adb PNA |
329 | static inline int |
330 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
331 | { | |
77236b6e | 332 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
333 | return 0; |
334 | ||
df6fb868 | 335 | nla_put_failure: |
c1d10adb PNA |
336 | return -1; |
337 | } | |
338 | ||
339 | static inline int | |
340 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
341 | { | |
77236b6e | 342 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
343 | return 0; |
344 | ||
df6fb868 | 345 | nla_put_failure: |
c1d10adb PNA |
346 | return -1; |
347 | } | |
348 | ||
c1d10adb PNA |
349 | static int |
350 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 351 | int event, const struct nf_conn *ct) |
c1d10adb PNA |
352 | { |
353 | struct nlmsghdr *nlh; | |
354 | struct nfgenmsg *nfmsg; | |
df6fb868 | 355 | struct nlattr *nest_parms; |
27a884dc | 356 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
357 | |
358 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
359 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
360 | nfmsg = NLMSG_DATA(nlh); | |
361 | ||
8b0a231d | 362 | nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0; |
5e8fbe2a | 363 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
364 | nfmsg->version = NFNETLINK_V0; |
365 | nfmsg->res_id = 0; | |
366 | ||
df6fb868 PM |
367 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
368 | if (!nest_parms) | |
369 | goto nla_put_failure; | |
f2f3e38c | 370 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
371 | goto nla_put_failure; |
372 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 373 | |
df6fb868 PM |
374 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
375 | if (!nest_parms) | |
376 | goto nla_put_failure; | |
f2f3e38c | 377 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
378 | goto nla_put_failure; |
379 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
380 | |
381 | if (ctnetlink_dump_status(skb, ct) < 0 || | |
382 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
383 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
384 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
385 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
386 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
387 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 388 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 389 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 390 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 391 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 392 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 393 | goto nla_put_failure; |
c1d10adb | 394 | |
27a884dc | 395 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
396 | return skb->len; |
397 | ||
398 | nlmsg_failure: | |
df6fb868 | 399 | nla_put_failure: |
dc5fc579 | 400 | nlmsg_trim(skb, b); |
c1d10adb PNA |
401 | return -1; |
402 | } | |
403 | ||
404 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2732c4e4 HE |
405 | /* |
406 | * The general structure of a ctnetlink event is | |
407 | * | |
408 | * CTA_TUPLE_ORIG | |
409 | * <l3/l4-proto-attributes> | |
410 | * CTA_TUPLE_REPLY | |
411 | * <l3/l4-proto-attributes> | |
412 | * CTA_ID | |
413 | * ... | |
414 | * CTA_PROTOINFO | |
415 | * <l4-proto-attributes> | |
416 | * CTA_TUPLE_MASTER | |
417 | * <l3/l4-proto-attributes> | |
418 | * | |
419 | * Therefore the formular is | |
420 | * | |
421 | * size = sizeof(headers) + sizeof(generic_nlas) + 3 * sizeof(tuple_nlas) | |
422 | * + sizeof(protoinfo_nlas) | |
423 | */ | |
424 | static struct sk_buff * | |
425 | ctnetlink_alloc_skb(const struct nf_conntrack_tuple *tuple, gfp_t gfp) | |
426 | { | |
427 | struct nf_conntrack_l3proto *l3proto; | |
428 | struct nf_conntrack_l4proto *l4proto; | |
429 | int len; | |
430 | ||
431 | #define NLA_TYPE_SIZE(type) nla_total_size(sizeof(type)) | |
432 | ||
433 | /* proto independant part */ | |
434 | len = NLMSG_SPACE(sizeof(struct nfgenmsg)) | |
435 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
436 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
437 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
438 | + 3 * NLA_TYPE_SIZE(u_int8_t) /* CTA_PROTO_NUM */ | |
439 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_ID */ | |
440 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_STATUS */ | |
d271e8bd | 441 | #ifdef CONFIG_NF_CT_ACCT |
2732c4e4 HE |
442 | + 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
443 | + 2 * NLA_TYPE_SIZE(uint64_t) /* CTA_COUNTERS_PACKETS */ | |
444 | + 2 * NLA_TYPE_SIZE(uint64_t) /* CTA_COUNTERS_BYTES */ | |
d271e8bd | 445 | #endif |
2732c4e4 HE |
446 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_TIMEOUT */ |
447 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
448 | + nla_total_size(0) /* CTA_HELP */ | |
449 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
d271e8bd | 450 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
2732c4e4 | 451 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_SECMARK */ |
d271e8bd HE |
452 | #endif |
453 | #ifdef CONFIG_NF_NAT_NEEDED | |
2732c4e4 HE |
454 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
455 | + 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_POS */ | |
456 | + 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_BEFORE */ | |
457 | + 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_AFTER */ | |
d271e8bd HE |
458 | #endif |
459 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
460 | + NLA_TYPE_SIZE(u_int32_t) /* CTA_MARK */ | |
461 | #endif | |
462 | ; | |
2732c4e4 HE |
463 | |
464 | #undef NLA_TYPE_SIZE | |
465 | ||
466 | rcu_read_lock(); | |
467 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
468 | len += l3proto->nla_size; | |
469 | ||
470 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
471 | len += l4proto->nla_size; | |
472 | rcu_read_unlock(); | |
473 | ||
474 | return alloc_skb(len, gfp); | |
475 | } | |
476 | ||
c1d10adb | 477 | static int ctnetlink_conntrack_event(struct notifier_block *this, |
601e68e1 | 478 | unsigned long events, void *ptr) |
c1d10adb PNA |
479 | { |
480 | struct nlmsghdr *nlh; | |
481 | struct nfgenmsg *nfmsg; | |
df6fb868 | 482 | struct nlattr *nest_parms; |
19abb7b0 PNA |
483 | struct nf_ct_event *item = (struct nf_ct_event *)ptr; |
484 | struct nf_conn *ct = item->ct; | |
c1d10adb PNA |
485 | struct sk_buff *skb; |
486 | unsigned int type; | |
27a884dc | 487 | sk_buff_data_t b; |
c1d10adb PNA |
488 | unsigned int flags = 0, group; |
489 | ||
490 | /* ignore our fake conntrack entry */ | |
491 | if (ct == &nf_conntrack_untracked) | |
492 | return NOTIFY_DONE; | |
493 | ||
494 | if (events & IPCT_DESTROY) { | |
495 | type = IPCTNL_MSG_CT_DELETE; | |
496 | group = NFNLGRP_CONNTRACK_DESTROY; | |
497 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { | |
498 | type = IPCTNL_MSG_CT_NEW; | |
499 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 500 | group = NFNLGRP_CONNTRACK_NEW; |
1a31526b | 501 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
c1d10adb PNA |
502 | type = IPCTNL_MSG_CT_NEW; |
503 | group = NFNLGRP_CONNTRACK_UPDATE; | |
504 | } else | |
505 | return NOTIFY_DONE; | |
a2427692 | 506 | |
1f9da256 | 507 | if (!item->report && !nfnetlink_has_listeners(group)) |
a2427692 PM |
508 | return NOTIFY_DONE; |
509 | ||
f2f3e38c PNA |
510 | skb = ctnetlink_alloc_skb(nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL), |
511 | GFP_ATOMIC); | |
c1d10adb | 512 | if (!skb) |
150ace0d | 513 | goto errout; |
c1d10adb PNA |
514 | |
515 | b = skb->tail; | |
516 | ||
517 | type |= NFNL_SUBSYS_CTNETLINK << 8; | |
19abb7b0 | 518 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
519 | nfmsg = NLMSG_DATA(nlh); |
520 | ||
521 | nlh->nlmsg_flags = flags; | |
5e8fbe2a | 522 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
523 | nfmsg->version = NFNETLINK_V0; |
524 | nfmsg->res_id = 0; | |
525 | ||
528a3a6f | 526 | rcu_read_lock(); |
df6fb868 PM |
527 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
528 | if (!nest_parms) | |
529 | goto nla_put_failure; | |
f2f3e38c | 530 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
531 | goto nla_put_failure; |
532 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 533 | |
df6fb868 PM |
534 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
535 | if (!nest_parms) | |
536 | goto nla_put_failure; | |
f2f3e38c | 537 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
538 | goto nla_put_failure; |
539 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 540 | |
1eedf699 EL |
541 | if (ctnetlink_dump_id(skb, ct) < 0) |
542 | goto nla_put_failure; | |
543 | ||
e57dce60 FH |
544 | if (ctnetlink_dump_status(skb, ct) < 0) |
545 | goto nla_put_failure; | |
546 | ||
7b621c1e PNA |
547 | if (events & IPCT_DESTROY) { |
548 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
549 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 550 | goto nla_put_failure; |
7b621c1e | 551 | } else { |
7b621c1e | 552 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 553 | goto nla_put_failure; |
7b621c1e PNA |
554 | |
555 | if (events & IPCT_PROTOINFO | |
556 | && ctnetlink_dump_protoinfo(skb, ct) < 0) | |
df6fb868 | 557 | goto nla_put_failure; |
7b621c1e PNA |
558 | |
559 | if ((events & IPCT_HELPER || nfct_help(ct)) | |
560 | && ctnetlink_dump_helpinfo(skb, ct) < 0) | |
df6fb868 | 561 | goto nla_put_failure; |
7b621c1e | 562 | |
37fccd85 PNA |
563 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
564 | if ((events & IPCT_SECMARK || ct->secmark) | |
565 | && ctnetlink_dump_secmark(skb, ct) < 0) | |
566 | goto nla_put_failure; | |
567 | #endif | |
7b621c1e | 568 | |
0f417ce9 PNA |
569 | if (events & IPCT_RELATED && |
570 | ctnetlink_dump_master(skb, ct) < 0) | |
571 | goto nla_put_failure; | |
572 | ||
13eae15a PNA |
573 | if (events & IPCT_NATSEQADJ && |
574 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) | |
575 | goto nla_put_failure; | |
7b621c1e | 576 | } |
b9a37e0c | 577 | |
a83099a6 EL |
578 | #ifdef CONFIG_NF_CONNTRACK_MARK |
579 | if ((events & IPCT_MARK || ct->mark) | |
580 | && ctnetlink_dump_mark(skb, ct) < 0) | |
581 | goto nla_put_failure; | |
582 | #endif | |
528a3a6f | 583 | rcu_read_unlock(); |
a83099a6 | 584 | |
c1d10adb | 585 | nlh->nlmsg_len = skb->tail - b; |
19abb7b0 | 586 | nfnetlink_send(skb, item->pid, group, item->report); |
c1d10adb PNA |
587 | return NOTIFY_DONE; |
588 | ||
df6fb868 | 589 | nla_put_failure: |
528a3a6f PNA |
590 | rcu_read_unlock(); |
591 | nlmsg_failure: | |
c1d10adb | 592 | kfree_skb(skb); |
150ace0d PNA |
593 | errout: |
594 | nfnetlink_set_err(0, group, -ENOBUFS); | |
c1d10adb PNA |
595 | return NOTIFY_DONE; |
596 | } | |
597 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
598 | ||
599 | static int ctnetlink_done(struct netlink_callback *cb) | |
600 | { | |
89f2e218 PM |
601 | if (cb->args[1]) |
602 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
603 | return 0; |
604 | } | |
605 | ||
606 | static int | |
607 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
608 | { | |
89f2e218 | 609 | struct nf_conn *ct, *last; |
c1d10adb | 610 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 611 | struct hlist_nulls_node *n; |
87711cb8 PNA |
612 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
613 | u_int8_t l3proto = nfmsg->nfgen_family; | |
c1d10adb | 614 | |
76507f69 | 615 | rcu_read_lock(); |
d205dc40 | 616 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
617 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
618 | restart: | |
ea781f19 ED |
619 | hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
620 | hnnode) { | |
5b1158e9 | 621 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
622 | continue; |
623 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
624 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
625 | continue; | |
87711cb8 PNA |
626 | /* Dump entries of a given L3 protocol number. |
627 | * If it is not specified, ie. l3proto == 0, | |
628 | * then dump everything. */ | |
5e8fbe2a | 629 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 630 | goto releasect; |
d205dc40 PM |
631 | if (cb->args[1]) { |
632 | if (ct != last) | |
ea781f19 | 633 | goto releasect; |
d205dc40 | 634 | cb->args[1] = 0; |
89f2e218 | 635 | } |
c1d10adb | 636 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 637 | cb->nlh->nlmsg_seq, |
8b0a231d | 638 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
89f2e218 | 639 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 640 | goto out; |
89f2e218 | 641 | } |
58401572 | 642 | |
01f34848 | 643 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
644 | IPCTNL_MSG_CT_GET_CTRZERO) { |
645 | struct nf_conn_counter *acct; | |
646 | ||
647 | acct = nf_conn_acct_find(ct); | |
648 | if (acct) | |
649 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
650 | } | |
ea781f19 ED |
651 | releasect: |
652 | nf_ct_put(ct); | |
89f2e218 | 653 | } |
d205dc40 | 654 | if (cb->args[1]) { |
89f2e218 PM |
655 | cb->args[1] = 0; |
656 | goto restart; | |
c1d10adb PNA |
657 | } |
658 | } | |
89f2e218 | 659 | out: |
76507f69 | 660 | rcu_read_unlock(); |
d205dc40 PM |
661 | if (last) |
662 | nf_ct_put(last); | |
c1d10adb | 663 | |
c1d10adb PNA |
664 | return skb->len; |
665 | } | |
666 | ||
c1d10adb | 667 | static inline int |
df6fb868 | 668 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 669 | { |
df6fb868 | 670 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
671 | struct nf_conntrack_l3proto *l3proto; |
672 | int ret = 0; | |
673 | ||
df6fb868 | 674 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 675 | |
cd91566e FW |
676 | rcu_read_lock(); |
677 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 678 | |
f73e924c PM |
679 | if (likely(l3proto->nlattr_to_tuple)) { |
680 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
681 | l3proto->nla_policy); | |
682 | if (ret == 0) | |
683 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
684 | } | |
c1d10adb | 685 | |
cd91566e | 686 | rcu_read_unlock(); |
c1d10adb | 687 | |
c1d10adb PNA |
688 | return ret; |
689 | } | |
690 | ||
f73e924c PM |
691 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
692 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
693 | }; |
694 | ||
695 | static inline int | |
df6fb868 | 696 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
697 | struct nf_conntrack_tuple *tuple) |
698 | { | |
df6fb868 | 699 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 700 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
701 | int ret = 0; |
702 | ||
f73e924c PM |
703 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
704 | if (ret < 0) | |
705 | return ret; | |
c1d10adb | 706 | |
df6fb868 | 707 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 708 | return -EINVAL; |
77236b6e | 709 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 710 | |
cd91566e FW |
711 | rcu_read_lock(); |
712 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 713 | |
f73e924c PM |
714 | if (likely(l4proto->nlattr_to_tuple)) { |
715 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
716 | l4proto->nla_policy); | |
717 | if (ret == 0) | |
718 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
719 | } | |
c1d10adb | 720 | |
cd91566e | 721 | rcu_read_unlock(); |
601e68e1 | 722 | |
c1d10adb PNA |
723 | return ret; |
724 | } | |
725 | ||
bb5cf80e | 726 | static int |
df6fb868 | 727 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
728 | enum ctattr_tuple type, u_int8_t l3num) |
729 | { | |
df6fb868 | 730 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
731 | int err; |
732 | ||
c1d10adb PNA |
733 | memset(tuple, 0, sizeof(*tuple)); |
734 | ||
df6fb868 | 735 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 736 | |
df6fb868 | 737 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
738 | return -EINVAL; |
739 | ||
740 | tuple->src.l3num = l3num; | |
741 | ||
df6fb868 | 742 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
743 | if (err < 0) |
744 | return err; | |
745 | ||
df6fb868 | 746 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
747 | return -EINVAL; |
748 | ||
df6fb868 | 749 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
750 | if (err < 0) |
751 | return err; | |
752 | ||
753 | /* orig and expect tuples get DIR_ORIGINAL */ | |
754 | if (type == CTA_TUPLE_REPLY) | |
755 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
756 | else | |
757 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
758 | ||
c1d10adb PNA |
759 | return 0; |
760 | } | |
761 | ||
c1d10adb | 762 | static inline int |
df6fb868 | 763 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 764 | { |
df6fb868 | 765 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 766 | |
df6fb868 | 767 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 768 | |
df6fb868 | 769 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
770 | return -EINVAL; |
771 | ||
df6fb868 | 772 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
773 | |
774 | return 0; | |
775 | } | |
776 | ||
f73e924c PM |
777 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
778 | [CTA_STATUS] = { .type = NLA_U32 }, | |
779 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
780 | [CTA_MARK] = { .type = NLA_U32 }, | |
781 | [CTA_USE] = { .type = NLA_U32 }, | |
782 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
783 | }; |
784 | ||
785 | static int | |
601e68e1 | 786 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 787 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
788 | { |
789 | struct nf_conntrack_tuple_hash *h; | |
790 | struct nf_conntrack_tuple tuple; | |
791 | struct nf_conn *ct; | |
792 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
793 | u_int8_t u3 = nfmsg->nfgen_family; | |
794 | int err = 0; | |
795 | ||
df6fb868 | 796 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 797 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 798 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
799 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
800 | else { | |
801 | /* Flush the whole table */ | |
19abb7b0 PNA |
802 | nf_conntrack_flush(&init_net, |
803 | NETLINK_CB(skb).pid, | |
804 | nlmsg_report(nlh)); | |
c1d10adb PNA |
805 | return 0; |
806 | } | |
807 | ||
808 | if (err < 0) | |
809 | return err; | |
810 | ||
400dad39 | 811 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 812 | if (!h) |
c1d10adb | 813 | return -ENOENT; |
c1d10adb PNA |
814 | |
815 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 816 | |
df6fb868 | 817 | if (cda[CTA_ID]) { |
77236b6e | 818 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 819 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
820 | nf_ct_put(ct); |
821 | return -ENOENT; | |
822 | } | |
601e68e1 | 823 | } |
c1d10adb | 824 | |
19abb7b0 PNA |
825 | nf_conntrack_event_report(IPCT_DESTROY, |
826 | ct, | |
827 | NETLINK_CB(skb).pid, | |
828 | nlmsg_report(nlh)); | |
829 | ||
830 | /* death_by_timeout would report the event again */ | |
831 | set_bit(IPS_DYING_BIT, &ct->status); | |
832 | ||
51091764 | 833 | nf_ct_kill(ct); |
c1d10adb | 834 | nf_ct_put(ct); |
c1d10adb PNA |
835 | |
836 | return 0; | |
837 | } | |
838 | ||
839 | static int | |
601e68e1 | 840 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 841 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
842 | { |
843 | struct nf_conntrack_tuple_hash *h; | |
844 | struct nf_conntrack_tuple tuple; | |
845 | struct nf_conn *ct; | |
846 | struct sk_buff *skb2 = NULL; | |
847 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
848 | u_int8_t u3 = nfmsg->nfgen_family; | |
849 | int err = 0; | |
850 | ||
58401572 | 851 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
852 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
853 | ctnetlink_done); | |
c1d10adb | 854 | |
df6fb868 | 855 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 856 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 857 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
858 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
859 | else | |
860 | return -EINVAL; | |
861 | ||
862 | if (err < 0) | |
863 | return err; | |
864 | ||
400dad39 | 865 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 866 | if (!h) |
c1d10adb | 867 | return -ENOENT; |
9ea8cfd6 | 868 | |
c1d10adb PNA |
869 | ct = nf_ct_tuplehash_to_ctrack(h); |
870 | ||
871 | err = -ENOMEM; | |
872 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
873 | if (!skb2) { | |
874 | nf_ct_put(ct); | |
875 | return -ENOMEM; | |
876 | } | |
c1d10adb | 877 | |
528a3a6f | 878 | rcu_read_lock(); |
601e68e1 | 879 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
8b0a231d | 880 | IPCTNL_MSG_CT_NEW, ct); |
528a3a6f | 881 | rcu_read_unlock(); |
c1d10adb PNA |
882 | nf_ct_put(ct); |
883 | if (err <= 0) | |
884 | goto free; | |
885 | ||
886 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
887 | if (err < 0) | |
888 | goto out; | |
889 | ||
c1d10adb PNA |
890 | return 0; |
891 | ||
892 | free: | |
893 | kfree_skb(skb2); | |
894 | out: | |
895 | return err; | |
896 | } | |
897 | ||
67671841 | 898 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
899 | static int |
900 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
901 | enum nf_nat_manip_type manip, | |
902 | struct nlattr *attr) | |
903 | { | |
904 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
905 | ||
906 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
907 | if (!parse_nat_setup) { | |
95a5afca | 908 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 909 | rcu_read_unlock(); |
748085fc | 910 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
911 | nfnl_unlock(); |
912 | if (request_module("nf-nat-ipv4") < 0) { | |
913 | nfnl_lock(); | |
748085fc | 914 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
915 | rcu_read_lock(); |
916 | return -EOPNOTSUPP; | |
917 | } | |
918 | nfnl_lock(); | |
748085fc | 919 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
920 | rcu_read_lock(); |
921 | if (nfnetlink_parse_nat_setup_hook) | |
922 | return -EAGAIN; | |
923 | #endif | |
924 | return -EOPNOTSUPP; | |
925 | } | |
926 | ||
927 | return parse_nat_setup(ct, manip, attr); | |
928 | } | |
67671841 | 929 | #endif |
e6a7d3c0 | 930 | |
bb5cf80e | 931 | static int |
df6fb868 | 932 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
933 | { |
934 | unsigned long d; | |
77236b6e | 935 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
936 | d = ct->status ^ status; |
937 | ||
938 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
939 | /* unchangeable */ | |
0adf9d67 | 940 | return -EBUSY; |
601e68e1 | 941 | |
c1d10adb PNA |
942 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
943 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 944 | return -EBUSY; |
601e68e1 | 945 | |
c1d10adb PNA |
946 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
947 | /* ASSURED bit can only be set */ | |
0adf9d67 | 948 | return -EBUSY; |
c1d10adb | 949 | |
c1d10adb PNA |
950 | /* Be careful here, modifying NAT bits can screw up things, |
951 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 952 | * nf_nat_range. */ |
c1d10adb PNA |
953 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
954 | return 0; | |
955 | } | |
956 | ||
e6a7d3c0 PNA |
957 | static int |
958 | ctnetlink_change_nat(struct nf_conn *ct, struct nlattr *cda[]) | |
959 | { | |
960 | #ifdef CONFIG_NF_NAT_NEEDED | |
961 | int ret; | |
962 | ||
963 | if (cda[CTA_NAT_DST]) { | |
964 | ret = ctnetlink_parse_nat_setup(ct, | |
965 | IP_NAT_MANIP_DST, | |
966 | cda[CTA_NAT_DST]); | |
967 | if (ret < 0) | |
968 | return ret; | |
969 | } | |
970 | if (cda[CTA_NAT_SRC]) { | |
971 | ret = ctnetlink_parse_nat_setup(ct, | |
972 | IP_NAT_MANIP_SRC, | |
973 | cda[CTA_NAT_SRC]); | |
974 | if (ret < 0) | |
975 | return ret; | |
976 | } | |
977 | return 0; | |
978 | #else | |
979 | return -EOPNOTSUPP; | |
980 | #endif | |
981 | } | |
c1d10adb PNA |
982 | |
983 | static inline int | |
df6fb868 | 984 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
985 | { |
986 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 987 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 988 | char *helpname = NULL; |
c1d10adb PNA |
989 | int err; |
990 | ||
c1d10adb PNA |
991 | /* don't change helper of sibling connections */ |
992 | if (ct->master) | |
0adf9d67 | 993 | return -EBUSY; |
c1d10adb | 994 | |
df6fb868 | 995 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
996 | if (err < 0) |
997 | return err; | |
998 | ||
df293bbb YK |
999 | if (!strcmp(helpname, "")) { |
1000 | if (help && help->helper) { | |
c1d10adb PNA |
1001 | /* we had a helper before ... */ |
1002 | nf_ct_remove_expectations(ct); | |
3c158f7f | 1003 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 1004 | } |
df293bbb YK |
1005 | |
1006 | return 0; | |
c1d10adb | 1007 | } |
601e68e1 | 1008 | |
df293bbb | 1009 | helper = __nf_conntrack_helper_find_byname(helpname); |
226c0c0e PNA |
1010 | if (helper == NULL) { |
1011 | #ifdef CONFIG_MODULES | |
1012 | spin_unlock_bh(&nf_conntrack_lock); | |
1013 | ||
1014 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1015 | spin_lock_bh(&nf_conntrack_lock); | |
1016 | return -EOPNOTSUPP; | |
1017 | } | |
1018 | ||
1019 | spin_lock_bh(&nf_conntrack_lock); | |
1020 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1021 | if (helper) | |
1022 | return -EAGAIN; | |
1023 | #endif | |
0adf9d67 | 1024 | return -EOPNOTSUPP; |
226c0c0e | 1025 | } |
df293bbb | 1026 | |
ceceae1b YK |
1027 | if (help) { |
1028 | if (help->helper == helper) | |
1029 | return 0; | |
1030 | if (help->helper) | |
1031 | return -EBUSY; | |
1032 | /* need to zero data of old helper */ | |
1033 | memset(&help->help, 0, sizeof(help->help)); | |
1034 | } else { | |
fab00c5d | 1035 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
ceceae1b YK |
1036 | if (help == NULL) |
1037 | return -ENOMEM; | |
1038 | } | |
df293bbb | 1039 | |
3c158f7f | 1040 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
1041 | |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | static inline int | |
df6fb868 | 1046 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1047 | { |
77236b6e | 1048 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1049 | |
c1d10adb PNA |
1050 | if (!del_timer(&ct->timeout)) |
1051 | return -ETIME; | |
1052 | ||
1053 | ct->timeout.expires = jiffies + timeout * HZ; | |
1054 | add_timer(&ct->timeout); | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | static inline int | |
df6fb868 | 1060 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1061 | { |
df6fb868 | 1062 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 1063 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1064 | int err = 0; |
1065 | ||
df6fb868 | 1066 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 1067 | |
cd91566e FW |
1068 | rcu_read_lock(); |
1069 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1070 | if (l4proto->from_nlattr) |
1071 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1072 | rcu_read_unlock(); |
c1d10adb PNA |
1073 | |
1074 | return err; | |
1075 | } | |
1076 | ||
13eae15a PNA |
1077 | #ifdef CONFIG_NF_NAT_NEEDED |
1078 | static inline int | |
1079 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1080 | { | |
1081 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1082 | ||
1083 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1084 | ||
1085 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1086 | return -EINVAL; | |
1087 | ||
1088 | natseq->correction_pos = | |
77236b6e | 1089 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1090 | |
1091 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1092 | return -EINVAL; | |
1093 | ||
1094 | natseq->offset_before = | |
77236b6e | 1095 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1096 | |
1097 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1098 | return -EINVAL; | |
1099 | ||
1100 | natseq->offset_after = | |
77236b6e | 1101 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1102 | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | static int | |
1107 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1108 | { | |
1109 | int ret = 0; | |
1110 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1111 | ||
1112 | if (!nat) | |
1113 | return 0; | |
1114 | ||
1115 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1116 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1117 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1118 | if (ret < 0) | |
1119 | return ret; | |
1120 | ||
1121 | ct->status |= IPS_SEQ_ADJUST; | |
1122 | } | |
1123 | ||
1124 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1125 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1126 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1127 | if (ret < 0) | |
1128 | return ret; | |
1129 | ||
1130 | ct->status |= IPS_SEQ_ADJUST; | |
1131 | } | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | #endif | |
1136 | ||
c1d10adb | 1137 | static int |
df6fb868 | 1138 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1139 | { |
1140 | int err; | |
1141 | ||
e098360f PNA |
1142 | /* only allow NAT changes and master assignation for new conntracks */ |
1143 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1144 | return -EOPNOTSUPP; | |
1145 | ||
df6fb868 | 1146 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1147 | err = ctnetlink_change_helper(ct, cda); |
1148 | if (err < 0) | |
1149 | return err; | |
1150 | } | |
1151 | ||
df6fb868 | 1152 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1153 | err = ctnetlink_change_timeout(ct, cda); |
1154 | if (err < 0) | |
1155 | return err; | |
1156 | } | |
1157 | ||
df6fb868 | 1158 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1159 | err = ctnetlink_change_status(ct, cda); |
1160 | if (err < 0) | |
1161 | return err; | |
1162 | } | |
1163 | ||
df6fb868 | 1164 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1165 | err = ctnetlink_change_protoinfo(ct, cda); |
1166 | if (err < 0) | |
1167 | return err; | |
1168 | } | |
1169 | ||
bcd1e830 | 1170 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1171 | if (cda[CTA_MARK]) |
77236b6e | 1172 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1173 | #endif |
1174 | ||
13eae15a PNA |
1175 | #ifdef CONFIG_NF_NAT_NEEDED |
1176 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1177 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1178 | if (err < 0) | |
1179 | return err; | |
1180 | } | |
1181 | #endif | |
1182 | ||
c1d10adb PNA |
1183 | return 0; |
1184 | } | |
1185 | ||
f0a3c086 | 1186 | static struct nf_conn * |
df6fb868 | 1187 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1188 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1189 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1190 | u8 u3) |
c1d10adb PNA |
1191 | { |
1192 | struct nf_conn *ct; | |
1193 | int err = -EINVAL; | |
ceceae1b | 1194 | struct nf_conntrack_helper *helper; |
c1d10adb | 1195 | |
b54ad409 | 1196 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1197 | if (IS_ERR(ct)) |
f0a3c086 | 1198 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1199 | |
df6fb868 | 1200 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1201 | goto err1; |
77236b6e | 1202 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1203 | |
1204 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1205 | ct->status |= IPS_CONFIRMED; | |
1206 | ||
1575e7ea | 1207 | rcu_read_lock(); |
226c0c0e | 1208 | if (cda[CTA_HELP]) { |
29fe1b48 | 1209 | char *helpname = NULL; |
226c0c0e PNA |
1210 | |
1211 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1212 | if (err < 0) |
1213 | goto err2; | |
226c0c0e PNA |
1214 | |
1215 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1216 | if (helper == NULL) { | |
1217 | rcu_read_unlock(); | |
1218 | #ifdef CONFIG_MODULES | |
1219 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1220 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1221 | goto err1; |
226c0c0e PNA |
1222 | } |
1223 | ||
1224 | rcu_read_lock(); | |
1225 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1226 | if (helper) { | |
226c0c0e | 1227 | err = -EAGAIN; |
0f5b3e85 | 1228 | goto err2; |
226c0c0e PNA |
1229 | } |
1230 | rcu_read_unlock(); | |
1231 | #endif | |
1232 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1233 | goto err1; |
226c0c0e PNA |
1234 | } else { |
1235 | struct nf_conn_help *help; | |
1236 | ||
1237 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1238 | if (help == NULL) { | |
226c0c0e | 1239 | err = -ENOMEM; |
0f5b3e85 | 1240 | goto err2; |
226c0c0e PNA |
1241 | } |
1242 | ||
1243 | /* not in hash table yet so not strictly necessary */ | |
1244 | rcu_assign_pointer(help->helper, helper); | |
1245 | } | |
1246 | } else { | |
1247 | /* try an implicit helper assignation */ | |
1248 | err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); | |
0f5b3e85 PM |
1249 | if (err < 0) |
1250 | goto err2; | |
1575e7ea PNA |
1251 | } |
1252 | ||
df6fb868 | 1253 | if (cda[CTA_STATUS]) { |
bbb3357d | 1254 | err = ctnetlink_change_status(ct, cda); |
0f5b3e85 PM |
1255 | if (err < 0) |
1256 | goto err2; | |
e6a7d3c0 PNA |
1257 | } |
1258 | ||
1259 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { | |
1260 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1261 | if (err < 0) |
1262 | goto err2; | |
bbb3357d | 1263 | } |
c1d10adb | 1264 | |
c969aa7d PNA |
1265 | #ifdef CONFIG_NF_NAT_NEEDED |
1266 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1267 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1268 | if (err < 0) |
1269 | goto err2; | |
c969aa7d PNA |
1270 | } |
1271 | #endif | |
1272 | ||
df6fb868 | 1273 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1274 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1275 | if (err < 0) |
1276 | goto err2; | |
c1d10adb PNA |
1277 | } |
1278 | ||
3ec19255 | 1279 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
58401572 | 1280 | |
bcd1e830 | 1281 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1282 | if (cda[CTA_MARK]) |
77236b6e | 1283 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1284 | #endif |
1285 | ||
5faa1f4c | 1286 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1287 | if (cda[CTA_TUPLE_MASTER]) { |
1288 | struct nf_conntrack_tuple master; | |
1289 | struct nf_conntrack_tuple_hash *master_h; | |
1290 | struct nf_conn *master_ct; | |
1291 | ||
1292 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1293 | if (err < 0) | |
0f5b3e85 | 1294 | goto err2; |
7ec47496 | 1295 | |
ea781f19 | 1296 | master_h = nf_conntrack_find_get(&init_net, &master); |
7ec47496 PNA |
1297 | if (master_h == NULL) { |
1298 | err = -ENOENT; | |
0f5b3e85 | 1299 | goto err2; |
7ec47496 PNA |
1300 | } |
1301 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1302 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1303 | ct->master = master_ct; |
f2a89004 | 1304 | } |
5faa1f4c | 1305 | |
c1d10adb PNA |
1306 | add_timer(&ct->timeout); |
1307 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1308 | rcu_read_unlock(); |
dafc741c | 1309 | |
f0a3c086 | 1310 | return ct; |
c1d10adb | 1311 | |
0f5b3e85 PM |
1312 | err2: |
1313 | rcu_read_unlock(); | |
1314 | err1: | |
c1d10adb | 1315 | nf_conntrack_free(ct); |
f0a3c086 | 1316 | return ERR_PTR(err); |
c1d10adb PNA |
1317 | } |
1318 | ||
601e68e1 YH |
1319 | static int |
1320 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1321 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1322 | { |
1323 | struct nf_conntrack_tuple otuple, rtuple; | |
1324 | struct nf_conntrack_tuple_hash *h = NULL; | |
1325 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1326 | u_int8_t u3 = nfmsg->nfgen_family; | |
1327 | int err = 0; | |
1328 | ||
df6fb868 | 1329 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1330 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1331 | if (err < 0) | |
1332 | return err; | |
1333 | } | |
1334 | ||
df6fb868 | 1335 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1336 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1337 | if (err < 0) | |
1338 | return err; | |
1339 | } | |
1340 | ||
f8ba1aff | 1341 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1342 | if (cda[CTA_TUPLE_ORIG]) |
400dad39 | 1343 | h = __nf_conntrack_find(&init_net, &otuple); |
df6fb868 | 1344 | else if (cda[CTA_TUPLE_REPLY]) |
400dad39 | 1345 | h = __nf_conntrack_find(&init_net, &rtuple); |
c1d10adb PNA |
1346 | |
1347 | if (h == NULL) { | |
c1d10adb | 1348 | err = -ENOENT; |
f0a3c086 PNA |
1349 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1350 | struct nf_conn *ct; | |
fecc1133 | 1351 | enum ip_conntrack_events events; |
5faa1f4c | 1352 | |
f0a3c086 PNA |
1353 | ct = ctnetlink_create_conntrack(cda, &otuple, |
1354 | &rtuple, u3); | |
1355 | if (IS_ERR(ct)) { | |
1356 | err = PTR_ERR(ct); | |
5faa1f4c PNA |
1357 | goto out_unlock; |
1358 | } | |
f0a3c086 PNA |
1359 | err = 0; |
1360 | nf_conntrack_get(&ct->ct_general); | |
1361 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1362 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1363 | events = IPCT_RELATED; | |
1364 | else | |
1365 | events = IPCT_NEW; | |
1366 | ||
1367 | nf_conntrack_event_report(IPCT_STATUS | | |
1368 | IPCT_HELPER | | |
1369 | IPCT_PROTOINFO | | |
1370 | IPCT_NATSEQADJ | | |
1371 | IPCT_MARK | events, | |
1372 | ct, NETLINK_CB(skb).pid, | |
1373 | nlmsg_report(nlh)); | |
f0a3c086 PNA |
1374 | nf_ct_put(ct); |
1375 | } else | |
1376 | spin_unlock_bh(&nf_conntrack_lock); | |
5faa1f4c | 1377 | |
c1d10adb PNA |
1378 | return err; |
1379 | } | |
1380 | /* implicit 'else' */ | |
1381 | ||
c1d10adb PNA |
1382 | /* We manipulate the conntrack inside the global conntrack table lock, |
1383 | * so there's no need to increase the refcount */ | |
c1d10adb | 1384 | err = -EEXIST; |
ff4ca827 | 1385 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1386 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1387 | ||
19abb7b0 PNA |
1388 | err = ctnetlink_change_conntrack(ct, cda); |
1389 | if (err == 0) { | |
1390 | nf_conntrack_get(&ct->ct_general); | |
1391 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1392 | nf_conntrack_event_report(IPCT_STATUS | |
1393 | IPCT_HELPER | | |
1394 | IPCT_PROTOINFO | | |
1395 | IPCT_NATSEQADJ | | |
1396 | IPCT_MARK, | |
1397 | ct, NETLINK_CB(skb).pid, | |
1398 | nlmsg_report(nlh)); | |
19abb7b0 PNA |
1399 | nf_ct_put(ct); |
1400 | } else | |
1401 | spin_unlock_bh(&nf_conntrack_lock); | |
1402 | ||
1403 | return err; | |
ff4ca827 | 1404 | } |
c1d10adb PNA |
1405 | |
1406 | out_unlock: | |
f8ba1aff | 1407 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1408 | return err; |
1409 | } | |
1410 | ||
601e68e1 YH |
1411 | /*********************************************************************** |
1412 | * EXPECT | |
1413 | ***********************************************************************/ | |
c1d10adb PNA |
1414 | |
1415 | static inline int | |
1416 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1417 | const struct nf_conntrack_tuple *tuple, | |
1418 | enum ctattr_expect type) | |
1419 | { | |
df6fb868 | 1420 | struct nlattr *nest_parms; |
601e68e1 | 1421 | |
df6fb868 PM |
1422 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1423 | if (!nest_parms) | |
1424 | goto nla_put_failure; | |
c1d10adb | 1425 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1426 | goto nla_put_failure; |
1427 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1428 | |
1429 | return 0; | |
1430 | ||
df6fb868 | 1431 | nla_put_failure: |
c1d10adb | 1432 | return -1; |
601e68e1 | 1433 | } |
c1d10adb | 1434 | |
1cde6436 PNA |
1435 | static inline int |
1436 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1437 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1438 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1439 | { |
1440 | int ret; | |
1441 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1442 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1443 | struct nf_conntrack_tuple m; |
df6fb868 | 1444 | struct nlattr *nest_parms; |
d4156e8c PM |
1445 | |
1446 | memset(&m, 0xFF, sizeof(m)); | |
1447 | m.src.u.all = mask->src.u.all; | |
1448 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1449 | ||
df6fb868 PM |
1450 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1451 | if (!nest_parms) | |
1452 | goto nla_put_failure; | |
1cde6436 | 1453 | |
528a3a6f | 1454 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1455 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1456 | |
1457 | if (unlikely(ret < 0)) | |
df6fb868 | 1458 | goto nla_put_failure; |
1cde6436 | 1459 | |
528a3a6f | 1460 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1461 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1462 | if (unlikely(ret < 0)) |
df6fb868 | 1463 | goto nla_put_failure; |
1cde6436 | 1464 | |
df6fb868 | 1465 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1466 | |
1467 | return 0; | |
1468 | ||
df6fb868 | 1469 | nla_put_failure: |
1cde6436 PNA |
1470 | return -1; |
1471 | } | |
1472 | ||
bb5cf80e | 1473 | static int |
c1d10adb | 1474 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1475 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1476 | { |
1477 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1478 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1479 | ||
1480 | if (timeout < 0) | |
1481 | timeout = 0; | |
c1d10adb PNA |
1482 | |
1483 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1484 | goto nla_put_failure; |
1cde6436 | 1485 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1486 | goto nla_put_failure; |
c1d10adb PNA |
1487 | if (ctnetlink_exp_dump_tuple(skb, |
1488 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1489 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1490 | goto nla_put_failure; |
601e68e1 | 1491 | |
d978e5da | 1492 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1493 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1494 | |
1495 | return 0; | |
601e68e1 | 1496 | |
df6fb868 | 1497 | nla_put_failure: |
c1d10adb PNA |
1498 | return -1; |
1499 | } | |
1500 | ||
1501 | static int | |
1502 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 1503 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1504 | { |
1505 | struct nlmsghdr *nlh; | |
1506 | struct nfgenmsg *nfmsg; | |
27a884dc | 1507 | unsigned char *b = skb_tail_pointer(skb); |
c1d10adb PNA |
1508 | |
1509 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
1510 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); | |
1511 | nfmsg = NLMSG_DATA(nlh); | |
1512 | ||
8b0a231d | 1513 | nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
1514 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1515 | nfmsg->version = NFNETLINK_V0; | |
1516 | nfmsg->res_id = 0; | |
1517 | ||
1518 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1519 | goto nla_put_failure; |
c1d10adb | 1520 | |
27a884dc | 1521 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
c1d10adb PNA |
1522 | return skb->len; |
1523 | ||
1524 | nlmsg_failure: | |
df6fb868 | 1525 | nla_put_failure: |
dc5fc579 | 1526 | nlmsg_trim(skb, b); |
c1d10adb PNA |
1527 | return -1; |
1528 | } | |
1529 | ||
1530 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1531 | static int ctnetlink_expect_event(struct notifier_block *this, | |
1532 | unsigned long events, void *ptr) | |
1533 | { | |
1534 | struct nlmsghdr *nlh; | |
1535 | struct nfgenmsg *nfmsg; | |
19abb7b0 PNA |
1536 | struct nf_exp_event *item = (struct nf_exp_event *)ptr; |
1537 | struct nf_conntrack_expect *exp = item->exp; | |
c1d10adb PNA |
1538 | struct sk_buff *skb; |
1539 | unsigned int type; | |
27a884dc | 1540 | sk_buff_data_t b; |
c1d10adb PNA |
1541 | int flags = 0; |
1542 | ||
1543 | if (events & IPEXP_NEW) { | |
1544 | type = IPCTNL_MSG_EXP_NEW; | |
1545 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1546 | } else | |
1547 | return NOTIFY_DONE; | |
1548 | ||
1f9da256 PNA |
1549 | if (!item->report && |
1550 | !nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) | |
b3a27bfb PNA |
1551 | return NOTIFY_DONE; |
1552 | ||
c1d10adb PNA |
1553 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
1554 | if (!skb) | |
150ace0d | 1555 | goto errout; |
c1d10adb PNA |
1556 | |
1557 | b = skb->tail; | |
1558 | ||
b633ad5f | 1559 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
19abb7b0 | 1560 | nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); |
c1d10adb PNA |
1561 | nfmsg = NLMSG_DATA(nlh); |
1562 | ||
1563 | nlh->nlmsg_flags = flags; | |
1564 | nfmsg->nfgen_family = exp->tuple.src.l3num; | |
1565 | nfmsg->version = NFNETLINK_V0; | |
1566 | nfmsg->res_id = 0; | |
1567 | ||
528a3a6f | 1568 | rcu_read_lock(); |
c1d10adb | 1569 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1570 | goto nla_put_failure; |
528a3a6f | 1571 | rcu_read_unlock(); |
c1d10adb PNA |
1572 | |
1573 | nlh->nlmsg_len = skb->tail - b; | |
19abb7b0 | 1574 | nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report); |
c1d10adb PNA |
1575 | return NOTIFY_DONE; |
1576 | ||
df6fb868 | 1577 | nla_put_failure: |
528a3a6f PNA |
1578 | rcu_read_unlock(); |
1579 | nlmsg_failure: | |
c1d10adb | 1580 | kfree_skb(skb); |
150ace0d PNA |
1581 | errout: |
1582 | nfnetlink_set_err(0, 0, -ENOBUFS); | |
c1d10adb PNA |
1583 | return NOTIFY_DONE; |
1584 | } | |
1585 | #endif | |
cf6994c2 PM |
1586 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1587 | { | |
31f15875 PM |
1588 | if (cb->args[1]) |
1589 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1590 | return 0; |
1591 | } | |
c1d10adb PNA |
1592 | |
1593 | static int | |
1594 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1595 | { | |
9b03f38d | 1596 | struct net *net = &init_net; |
cf6994c2 | 1597 | struct nf_conntrack_expect *exp, *last; |
87711cb8 | 1598 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
31f15875 | 1599 | struct hlist_node *n; |
87711cb8 | 1600 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1601 | |
7d0742da | 1602 | rcu_read_lock(); |
31f15875 PM |
1603 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1604 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1605 | restart: |
9b03f38d | 1606 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1607 | hnode) { |
1608 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1609 | continue; |
31f15875 PM |
1610 | if (cb->args[1]) { |
1611 | if (exp != last) | |
1612 | continue; | |
1613 | cb->args[1] = 0; | |
1614 | } | |
8b0a231d PNA |
1615 | if (ctnetlink_exp_fill_info(skb, |
1616 | NETLINK_CB(cb->skb).pid, | |
31f15875 PM |
1617 | cb->nlh->nlmsg_seq, |
1618 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 1619 | exp) < 0) { |
7d0742da PM |
1620 | if (!atomic_inc_not_zero(&exp->use)) |
1621 | continue; | |
31f15875 PM |
1622 | cb->args[1] = (unsigned long)exp; |
1623 | goto out; | |
1624 | } | |
cf6994c2 | 1625 | } |
31f15875 PM |
1626 | if (cb->args[1]) { |
1627 | cb->args[1] = 0; | |
1628 | goto restart; | |
cf6994c2 PM |
1629 | } |
1630 | } | |
601e68e1 | 1631 | out: |
7d0742da | 1632 | rcu_read_unlock(); |
cf6994c2 PM |
1633 | if (last) |
1634 | nf_ct_expect_put(last); | |
c1d10adb | 1635 | |
c1d10adb PNA |
1636 | return skb->len; |
1637 | } | |
1638 | ||
f73e924c PM |
1639 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1640 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1641 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1642 | }; |
1643 | ||
1644 | static int | |
601e68e1 | 1645 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1646 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1647 | { |
1648 | struct nf_conntrack_tuple tuple; | |
1649 | struct nf_conntrack_expect *exp; | |
1650 | struct sk_buff *skb2; | |
1651 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1652 | u_int8_t u3 = nfmsg->nfgen_family; | |
1653 | int err = 0; | |
1654 | ||
c1d10adb | 1655 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1656 | return netlink_dump_start(ctnl, skb, nlh, |
1657 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1658 | ctnetlink_exp_done); |
c1d10adb PNA |
1659 | } |
1660 | ||
df6fb868 | 1661 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1662 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1663 | else | |
1664 | return -EINVAL; | |
1665 | ||
1666 | if (err < 0) | |
1667 | return err; | |
1668 | ||
9b03f38d | 1669 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1670 | if (!exp) |
1671 | return -ENOENT; | |
1672 | ||
df6fb868 | 1673 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1674 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1675 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1676 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1677 | return -ENOENT; |
1678 | } | |
601e68e1 | 1679 | } |
c1d10adb PNA |
1680 | |
1681 | err = -ENOMEM; | |
1682 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1683 | if (!skb2) | |
1684 | goto out; | |
4e9b8269 | 1685 | |
528a3a6f | 1686 | rcu_read_lock(); |
601e68e1 | 1687 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
8b0a231d | 1688 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 1689 | rcu_read_unlock(); |
c1d10adb PNA |
1690 | if (err <= 0) |
1691 | goto free; | |
1692 | ||
6823645d | 1693 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1694 | |
1695 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1696 | ||
1697 | free: | |
1698 | kfree_skb(skb2); | |
1699 | out: | |
6823645d | 1700 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1701 | return err; |
1702 | } | |
1703 | ||
1704 | static int | |
601e68e1 | 1705 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1706 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1707 | { |
31f15875 | 1708 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1709 | struct nf_conntrack_tuple tuple; |
1710 | struct nf_conntrack_helper *h; | |
1711 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
31f15875 | 1712 | struct hlist_node *n, *next; |
c1d10adb | 1713 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1714 | unsigned int i; |
c1d10adb PNA |
1715 | int err; |
1716 | ||
df6fb868 | 1717 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1718 | /* delete a single expect by tuple */ |
1719 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1720 | if (err < 0) | |
1721 | return err; | |
1722 | ||
1723 | /* bump usage count to 2 */ | |
9b03f38d | 1724 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1725 | if (!exp) |
1726 | return -ENOENT; | |
1727 | ||
df6fb868 | 1728 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1729 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1730 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1731 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1732 | return -ENOENT; |
1733 | } | |
1734 | } | |
1735 | ||
1736 | /* after list removal, usage count == 1 */ | |
6823645d | 1737 | nf_ct_unexpect_related(exp); |
601e68e1 | 1738 | /* have to put what we 'get' above. |
c1d10adb | 1739 | * after this line usage count == 0 */ |
6823645d | 1740 | nf_ct_expect_put(exp); |
df6fb868 PM |
1741 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1742 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1743 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1744 | |
1745 | /* delete all expectations for this helper */ | |
f8ba1aff | 1746 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1747 | h = __nf_conntrack_helper_find_byname(name); |
1748 | if (!h) { | |
f8ba1aff | 1749 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1750 | return -EOPNOTSUPP; |
c1d10adb | 1751 | } |
31f15875 PM |
1752 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1753 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1754 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1755 | hnode) { |
1756 | m_help = nfct_help(exp->master); | |
1757 | if (m_help->helper == h | |
1758 | && del_timer(&exp->timeout)) { | |
1759 | nf_ct_unlink_expect(exp); | |
1760 | nf_ct_expect_put(exp); | |
1761 | } | |
c1d10adb PNA |
1762 | } |
1763 | } | |
f8ba1aff | 1764 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1765 | } else { |
1766 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1767 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1768 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1769 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1770 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1771 | hnode) { |
1772 | if (del_timer(&exp->timeout)) { | |
1773 | nf_ct_unlink_expect(exp); | |
1774 | nf_ct_expect_put(exp); | |
1775 | } | |
c1d10adb PNA |
1776 | } |
1777 | } | |
f8ba1aff | 1778 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1779 | } |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | static int | |
df6fb868 | 1784 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1785 | { |
1786 | return -EOPNOTSUPP; | |
1787 | } | |
1788 | ||
1789 | static int | |
19abb7b0 | 1790 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) |
c1d10adb PNA |
1791 | { |
1792 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1793 | struct nf_conntrack_tuple_hash *h = NULL; | |
1794 | struct nf_conntrack_expect *exp; | |
1795 | struct nf_conn *ct; | |
dc808fe2 | 1796 | struct nf_conn_help *help; |
c1d10adb PNA |
1797 | int err = 0; |
1798 | ||
c1d10adb PNA |
1799 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1800 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1801 | if (err < 0) | |
1802 | return err; | |
1803 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1804 | if (err < 0) | |
1805 | return err; | |
1806 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1807 | if (err < 0) | |
1808 | return err; | |
1809 | ||
1810 | /* Look for master conntrack of this expectation */ | |
400dad39 | 1811 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
c1d10adb PNA |
1812 | if (!h) |
1813 | return -ENOENT; | |
1814 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1815 | help = nfct_help(ct); |
c1d10adb | 1816 | |
dc808fe2 | 1817 | if (!help || !help->helper) { |
c1d10adb | 1818 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1819 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1820 | goto out; |
1821 | } | |
1822 | ||
6823645d | 1823 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1824 | if (!exp) { |
1825 | err = -ENOMEM; | |
1826 | goto out; | |
1827 | } | |
601e68e1 | 1828 | |
626ba8fb | 1829 | exp->class = 0; |
c1d10adb PNA |
1830 | exp->expectfn = NULL; |
1831 | exp->flags = 0; | |
1832 | exp->master = ct; | |
9457d851 | 1833 | exp->helper = NULL; |
c1d10adb | 1834 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1835 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1836 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1837 | |
19abb7b0 | 1838 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1839 | nf_ct_expect_put(exp); |
c1d10adb | 1840 | |
601e68e1 | 1841 | out: |
c1d10adb PNA |
1842 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1843 | return err; | |
1844 | } | |
1845 | ||
1846 | static int | |
1847 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1848 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1849 | { |
1850 | struct nf_conntrack_tuple tuple; | |
1851 | struct nf_conntrack_expect *exp; | |
1852 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
1853 | u_int8_t u3 = nfmsg->nfgen_family; | |
1854 | int err = 0; | |
1855 | ||
df6fb868 PM |
1856 | if (!cda[CTA_EXPECT_TUPLE] |
1857 | || !cda[CTA_EXPECT_MASK] | |
1858 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1859 | return -EINVAL; |
1860 | ||
1861 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1862 | if (err < 0) | |
1863 | return err; | |
1864 | ||
f8ba1aff | 1865 | spin_lock_bh(&nf_conntrack_lock); |
9b03f38d | 1866 | exp = __nf_ct_expect_find(&init_net, &tuple); |
c1d10adb PNA |
1867 | |
1868 | if (!exp) { | |
f8ba1aff | 1869 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1870 | err = -ENOENT; |
19abb7b0 PNA |
1871 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1872 | err = ctnetlink_create_expect(cda, | |
1873 | u3, | |
1874 | NETLINK_CB(skb).pid, | |
1875 | nlmsg_report(nlh)); | |
1876 | } | |
c1d10adb PNA |
1877 | return err; |
1878 | } | |
1879 | ||
1880 | err = -EEXIST; | |
1881 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1882 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1883 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1884 | |
c1d10adb PNA |
1885 | return err; |
1886 | } | |
1887 | ||
1888 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1889 | static struct notifier_block ctnl_notifier = { | |
1890 | .notifier_call = ctnetlink_conntrack_event, | |
1891 | }; | |
1892 | ||
1893 | static struct notifier_block ctnl_notifier_exp = { | |
1894 | .notifier_call = ctnetlink_expect_event, | |
1895 | }; | |
1896 | #endif | |
1897 | ||
7c8d4cb4 | 1898 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1899 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1900 | .attr_count = CTA_MAX, |
1901 | .policy = ct_nla_policy }, | |
c1d10adb | 1902 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1903 | .attr_count = CTA_MAX, |
1904 | .policy = ct_nla_policy }, | |
c1d10adb | 1905 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1906 | .attr_count = CTA_MAX, |
1907 | .policy = ct_nla_policy }, | |
c1d10adb | 1908 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1909 | .attr_count = CTA_MAX, |
1910 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1911 | }; |
1912 | ||
7c8d4cb4 | 1913 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1914 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1915 | .attr_count = CTA_EXPECT_MAX, |
1916 | .policy = exp_nla_policy }, | |
c1d10adb | 1917 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1918 | .attr_count = CTA_EXPECT_MAX, |
1919 | .policy = exp_nla_policy }, | |
c1d10adb | 1920 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1921 | .attr_count = CTA_EXPECT_MAX, |
1922 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1923 | }; |
1924 | ||
7c8d4cb4 | 1925 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1926 | .name = "conntrack", |
1927 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1928 | .cb_count = IPCTNL_MSG_MAX, | |
1929 | .cb = ctnl_cb, | |
1930 | }; | |
1931 | ||
7c8d4cb4 | 1932 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1933 | .name = "conntrack_expect", |
1934 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1935 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1936 | .cb = ctnl_exp_cb, | |
1937 | }; | |
1938 | ||
d2483dde | 1939 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1940 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1941 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1942 | |
1943 | static int __init ctnetlink_init(void) | |
1944 | { | |
1945 | int ret; | |
1946 | ||
1947 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1948 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1949 | if (ret < 0) { | |
1950 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1951 | goto err_out; | |
1952 | } | |
1953 | ||
1954 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1955 | if (ret < 0) { | |
1956 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1957 | goto err_unreg_subsys; | |
1958 | } | |
1959 | ||
1960 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1961 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1962 | if (ret < 0) { | |
1963 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1964 | goto err_unreg_exp_subsys; | |
1965 | } | |
1966 | ||
6823645d | 1967 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1968 | if (ret < 0) { |
1969 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1970 | goto err_unreg_notifier; | |
1971 | } | |
1972 | #endif | |
1973 | ||
1974 | return 0; | |
1975 | ||
1976 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1977 | err_unreg_notifier: | |
1978 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1979 | err_unreg_exp_subsys: | |
1980 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1981 | #endif | |
1982 | err_unreg_subsys: | |
1983 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1984 | err_out: | |
1985 | return ret; | |
1986 | } | |
1987 | ||
1988 | static void __exit ctnetlink_exit(void) | |
1989 | { | |
1990 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1991 | ||
1992 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1993 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1994 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1995 | #endif | |
1996 | ||
1997 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1998 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1999 | return; | |
2000 | } | |
2001 | ||
2002 | module_init(ctnetlink_init); | |
2003 | module_exit(ctnetlink_exit); |