Commit | Line | Data |
---|---|---|
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 | |
31 | #include <linux/netfilter.h> | |
dc5fc579 | 32 | #include <net/netlink.h> |
c1d10adb PNA |
33 | #include <net/netfilter/nf_conntrack.h> |
34 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 35 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
36 | #include <net/netfilter/nf_conntrack_helper.h> |
37 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 38 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 39 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 40 | #include <net/netfilter/nf_conntrack_acct.h> |
5b1158e9 JK |
41 | #ifdef CONFIG_NF_NAT_NEEDED |
42 | #include <net/netfilter/nf_nat_core.h> | |
43 | #include <net/netfilter/nf_nat_protocol.h> | |
44 | #endif | |
c1d10adb PNA |
45 | |
46 | #include <linux/netfilter/nfnetlink.h> | |
47 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
48 | ||
49 | MODULE_LICENSE("GPL"); | |
50 | ||
dc808fe2 | 51 | static char __initdata version[] = "0.93"; |
c1d10adb | 52 | |
c1d10adb | 53 | static inline int |
601e68e1 | 54 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 55 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 56 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 57 | { |
c1d10adb | 58 | int ret = 0; |
df6fb868 | 59 | struct nlattr *nest_parms; |
c1d10adb | 60 | |
df6fb868 PM |
61 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
62 | if (!nest_parms) | |
63 | goto nla_put_failure; | |
77236b6e | 64 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 65 | |
fdf70832 PM |
66 | if (likely(l4proto->tuple_to_nlattr)) |
67 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 68 | |
df6fb868 | 69 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
70 | |
71 | return ret; | |
72 | ||
df6fb868 | 73 | nla_put_failure: |
c1d10adb PNA |
74 | return -1; |
75 | } | |
76 | ||
77 | static inline int | |
1cde6436 PNA |
78 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
79 | const struct nf_conntrack_tuple *tuple, | |
80 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 81 | { |
c1d10adb | 82 | int ret = 0; |
df6fb868 PM |
83 | struct nlattr *nest_parms; |
84 | ||
85 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
86 | if (!nest_parms) | |
87 | goto nla_put_failure; | |
1cde6436 | 88 | |
fdf70832 PM |
89 | if (likely(l3proto->tuple_to_nlattr)) |
90 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 91 | |
df6fb868 | 92 | nla_nest_end(skb, nest_parms); |
c1d10adb | 93 | |
1cde6436 PNA |
94 | return ret; |
95 | ||
df6fb868 | 96 | nla_put_failure: |
1cde6436 PNA |
97 | return -1; |
98 | } | |
99 | ||
bb5cf80e | 100 | static int |
1cde6436 PNA |
101 | ctnetlink_dump_tuples(struct sk_buff *skb, |
102 | const struct nf_conntrack_tuple *tuple) | |
103 | { | |
104 | int ret; | |
105 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 106 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 107 | |
528a3a6f | 108 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 109 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
110 | |
111 | if (unlikely(ret < 0)) | |
112 | return ret; | |
113 | ||
528a3a6f | 114 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 115 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
116 | |
117 | return ret; | |
c1d10adb PNA |
118 | } |
119 | ||
120 | static inline int | |
121 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
122 | { | |
77236b6e | 123 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
124 | return 0; |
125 | ||
df6fb868 | 126 | nla_put_failure: |
c1d10adb PNA |
127 | return -1; |
128 | } | |
129 | ||
130 | static inline int | |
131 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
132 | { | |
77236b6e | 133 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 134 | |
77236b6e | 135 | if (timeout < 0) |
c1d10adb | 136 | timeout = 0; |
601e68e1 | 137 | |
77236b6e | 138 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
139 | return 0; |
140 | ||
df6fb868 | 141 | nla_put_failure: |
c1d10adb PNA |
142 | return -1; |
143 | } | |
144 | ||
145 | static inline int | |
440f0d58 | 146 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 147 | { |
5e8fbe2a | 148 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 149 | struct nlattr *nest_proto; |
c1d10adb PNA |
150 | int ret; |
151 | ||
528a3a6f PNA |
152 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
153 | if (!l4proto->to_nlattr) | |
c1d10adb | 154 | return 0; |
601e68e1 | 155 | |
df6fb868 PM |
156 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
157 | if (!nest_proto) | |
158 | goto nla_put_failure; | |
c1d10adb | 159 | |
fdf70832 | 160 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 161 | |
df6fb868 | 162 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
163 | |
164 | return ret; | |
165 | ||
df6fb868 | 166 | nla_put_failure: |
c1d10adb PNA |
167 | return -1; |
168 | } | |
169 | ||
170 | static inline int | |
171 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
172 | { | |
df6fb868 | 173 | struct nlattr *nest_helper; |
dc808fe2 | 174 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 175 | struct nf_conntrack_helper *helper; |
c1d10adb | 176 | |
3c158f7f | 177 | if (!help) |
c1d10adb | 178 | return 0; |
601e68e1 | 179 | |
3c158f7f PM |
180 | helper = rcu_dereference(help->helper); |
181 | if (!helper) | |
182 | goto out; | |
183 | ||
df6fb868 PM |
184 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
185 | if (!nest_helper) | |
186 | goto nla_put_failure; | |
77236b6e | 187 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 188 | |
fdf70832 PM |
189 | if (helper->to_nlattr) |
190 | helper->to_nlattr(skb, ct); | |
c1d10adb | 191 | |
df6fb868 | 192 | nla_nest_end(skb, nest_helper); |
3c158f7f | 193 | out: |
c1d10adb PNA |
194 | return 0; |
195 | ||
df6fb868 | 196 | nla_put_failure: |
c1d10adb PNA |
197 | return -1; |
198 | } | |
199 | ||
bb5cf80e | 200 | static int |
c1d10adb PNA |
201 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
202 | enum ip_conntrack_dir dir) | |
203 | { | |
204 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 205 | struct nlattr *nest_count; |
58401572 KPO |
206 | const struct nf_conn_counter *acct; |
207 | ||
208 | acct = nf_conn_acct_find(ct); | |
209 | if (!acct) | |
210 | return 0; | |
c1d10adb | 211 | |
df6fb868 PM |
212 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
213 | if (!nest_count) | |
214 | goto nla_put_failure; | |
215 | ||
58401572 KPO |
216 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
217 | cpu_to_be64(acct[dir].packets)); | |
218 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
219 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 220 | |
df6fb868 | 221 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
222 | |
223 | return 0; | |
224 | ||
df6fb868 | 225 | nla_put_failure: |
c1d10adb PNA |
226 | return -1; |
227 | } | |
c1d10adb PNA |
228 | |
229 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
230 | static inline int | |
231 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
232 | { | |
77236b6e | 233 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
234 | return 0; |
235 | ||
df6fb868 | 236 | nla_put_failure: |
c1d10adb PNA |
237 | return -1; |
238 | } | |
239 | #else | |
240 | #define ctnetlink_dump_mark(a, b) (0) | |
241 | #endif | |
242 | ||
37fccd85 PNA |
243 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
244 | static inline int | |
245 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
246 | { | |
77236b6e | 247 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
248 | return 0; |
249 | ||
250 | nla_put_failure: | |
251 | return -1; | |
252 | } | |
253 | #else | |
254 | #define ctnetlink_dump_secmark(a, b) (0) | |
255 | #endif | |
256 | ||
0f417ce9 PNA |
257 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
258 | ||
259 | static inline int | |
260 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
261 | { | |
262 | struct nlattr *nest_parms; | |
263 | ||
264 | if (!(ct->status & IPS_EXPECTED)) | |
265 | return 0; | |
266 | ||
267 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
268 | if (!nest_parms) | |
269 | goto nla_put_failure; | |
270 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
271 | goto nla_put_failure; | |
272 | nla_nest_end(skb, nest_parms); | |
273 | ||
274 | return 0; | |
275 | ||
276 | nla_put_failure: | |
277 | return -1; | |
278 | } | |
279 | ||
13eae15a | 280 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 281 | static int |
13eae15a PNA |
282 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
283 | { | |
13eae15a PNA |
284 | struct nlattr *nest_parms; |
285 | ||
286 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
287 | if (!nest_parms) | |
288 | goto nla_put_failure; | |
289 | ||
77236b6e PM |
290 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
291 | htonl(natseq->correction_pos)); | |
292 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
293 | htonl(natseq->offset_before)); | |
294 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
295 | htonl(natseq->offset_after)); | |
13eae15a PNA |
296 | |
297 | nla_nest_end(skb, nest_parms); | |
298 | ||
299 | return 0; | |
300 | ||
301 | nla_put_failure: | |
302 | return -1; | |
303 | } | |
304 | ||
305 | static inline int | |
306 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
307 | { | |
308 | struct nf_nat_seq *natseq; | |
309 | struct nf_conn_nat *nat = nfct_nat(ct); | |
310 | ||
311 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
312 | return 0; | |
313 | ||
314 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
315 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
316 | return -1; | |
317 | ||
318 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
319 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
320 | return -1; | |
321 | ||
322 | return 0; | |
323 | } | |
324 | #else | |
325 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
326 | #endif | |
327 | ||
c1d10adb PNA |
328 | static inline int |
329 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
330 | { | |
77236b6e | 331 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
332 | return 0; |
333 | ||
df6fb868 | 334 | nla_put_failure: |
c1d10adb PNA |
335 | return -1; |
336 | } | |
337 | ||
338 | static inline int | |
339 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
340 | { | |
77236b6e | 341 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
342 | return 0; |
343 | ||
df6fb868 | 344 | nla_put_failure: |
c1d10adb PNA |
345 | return -1; |
346 | } | |
347 | ||
c1d10adb PNA |
348 | static int |
349 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
440f0d58 | 350 | int event, struct nf_conn *ct) |
c1d10adb PNA |
351 | { |
352 | struct nlmsghdr *nlh; | |
353 | struct nfgenmsg *nfmsg; | |
df6fb868 | 354 | struct nlattr *nest_parms; |
96bcf938 | 355 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
356 | |
357 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
96bcf938 PNA |
358 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
359 | if (nlh == NULL) | |
360 | goto nlmsg_failure; | |
c1d10adb | 361 | |
96bcf938 | 362 | nfmsg = nlmsg_data(nlh); |
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 | |
96bcf938 | 395 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
396 | return skb->len; |
397 | ||
398 | nlmsg_failure: | |
df6fb868 | 399 | nla_put_failure: |
96bcf938 | 400 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
401 | return -1; |
402 | } | |
403 | ||
404 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
03b64f51 PNA |
405 | static inline size_t |
406 | ctnetlink_proto_size(const struct nf_conn *ct) | |
2732c4e4 HE |
407 | { |
408 | struct nf_conntrack_l3proto *l3proto; | |
409 | struct nf_conntrack_l4proto *l4proto; | |
03b64f51 PNA |
410 | size_t len = 0; |
411 | ||
412 | rcu_read_lock(); | |
413 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); | |
414 | len += l3proto->nla_size; | |
415 | ||
416 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
417 | len += l4proto->nla_size; | |
418 | rcu_read_unlock(); | |
419 | ||
420 | return len; | |
421 | } | |
422 | ||
423 | static inline size_t | |
424 | ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
425 | { | |
426 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
427 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
428 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
429 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
430 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
431 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
432 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
d271e8bd | 433 | #ifdef CONFIG_NF_CT_ACCT |
03b64f51 PNA |
434 | + 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
435 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ | |
436 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
d271e8bd | 437 | #endif |
03b64f51 PNA |
438 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
439 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
440 | + nla_total_size(0) /* CTA_HELP */ | |
441 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
d271e8bd | 442 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
03b64f51 | 443 | + nla_total_size(sizeof(u_int32_t)) /* CTA_SECMARK */ |
d271e8bd HE |
444 | #endif |
445 | #ifdef CONFIG_NF_NAT_NEEDED | |
03b64f51 PNA |
446 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
447 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
448 | #endif |
449 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 450 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
d271e8bd | 451 | #endif |
03b64f51 PNA |
452 | + ctnetlink_proto_size(ct) |
453 | ; | |
2732c4e4 HE |
454 | } |
455 | ||
e34d5c1a PNA |
456 | static int |
457 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb PNA |
458 | { |
459 | struct nlmsghdr *nlh; | |
460 | struct nfgenmsg *nfmsg; | |
df6fb868 | 461 | struct nlattr *nest_parms; |
19abb7b0 | 462 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
463 | struct sk_buff *skb; |
464 | unsigned int type; | |
c1d10adb | 465 | unsigned int flags = 0, group; |
dd7669a9 | 466 | int err; |
c1d10adb PNA |
467 | |
468 | /* ignore our fake conntrack entry */ | |
469 | if (ct == &nf_conntrack_untracked) | |
e34d5c1a | 470 | return 0; |
c1d10adb | 471 | |
a0891aa6 | 472 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
473 | type = IPCTNL_MSG_CT_DELETE; |
474 | group = NFNLGRP_CONNTRACK_DESTROY; | |
a0891aa6 | 475 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
476 | type = IPCTNL_MSG_CT_NEW; |
477 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 478 | group = NFNLGRP_CONNTRACK_NEW; |
17e6e4ea | 479 | } else if (events) { |
c1d10adb PNA |
480 | type = IPCTNL_MSG_CT_NEW; |
481 | group = NFNLGRP_CONNTRACK_UPDATE; | |
482 | } else | |
e34d5c1a | 483 | return 0; |
a2427692 | 484 | |
1f9da256 | 485 | if (!item->report && !nfnetlink_has_listeners(group)) |
e34d5c1a | 486 | return 0; |
a2427692 | 487 | |
03b64f51 PNA |
488 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
489 | if (skb == NULL) | |
150ace0d | 490 | goto errout; |
c1d10adb | 491 | |
c1d10adb | 492 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
96bcf938 PNA |
493 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
494 | if (nlh == NULL) | |
495 | goto nlmsg_failure; | |
c1d10adb | 496 | |
96bcf938 | 497 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 498 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
499 | nfmsg->version = NFNETLINK_V0; |
500 | nfmsg->res_id = 0; | |
501 | ||
528a3a6f | 502 | rcu_read_lock(); |
df6fb868 PM |
503 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
504 | if (!nest_parms) | |
505 | goto nla_put_failure; | |
f2f3e38c | 506 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
507 | goto nla_put_failure; |
508 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 509 | |
df6fb868 PM |
510 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
511 | if (!nest_parms) | |
512 | goto nla_put_failure; | |
f2f3e38c | 513 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
514 | goto nla_put_failure; |
515 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 516 | |
1eedf699 EL |
517 | if (ctnetlink_dump_id(skb, ct) < 0) |
518 | goto nla_put_failure; | |
519 | ||
e57dce60 FH |
520 | if (ctnetlink_dump_status(skb, ct) < 0) |
521 | goto nla_put_failure; | |
522 | ||
a0891aa6 | 523 | if (events & (1 << IPCT_DESTROY)) { |
7b621c1e PNA |
524 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
525 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 526 | goto nla_put_failure; |
7b621c1e | 527 | } else { |
7b621c1e | 528 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 529 | goto nla_put_failure; |
7b621c1e | 530 | |
a0891aa6 | 531 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 532 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 533 | goto nla_put_failure; |
7b621c1e | 534 | |
a0891aa6 | 535 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 536 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 537 | goto nla_put_failure; |
7b621c1e | 538 | |
37fccd85 | 539 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 540 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
37fccd85 PNA |
541 | && ctnetlink_dump_secmark(skb, ct) < 0) |
542 | goto nla_put_failure; | |
543 | #endif | |
7b621c1e | 544 | |
a0891aa6 | 545 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
546 | ctnetlink_dump_master(skb, ct) < 0) |
547 | goto nla_put_failure; | |
548 | ||
a0891aa6 | 549 | if (events & (1 << IPCT_NATSEQADJ) && |
13eae15a PNA |
550 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
551 | goto nla_put_failure; | |
7b621c1e | 552 | } |
b9a37e0c | 553 | |
a83099a6 | 554 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 555 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
556 | && ctnetlink_dump_mark(skb, ct) < 0) |
557 | goto nla_put_failure; | |
558 | #endif | |
528a3a6f | 559 | rcu_read_unlock(); |
a83099a6 | 560 | |
96bcf938 | 561 | nlmsg_end(skb, nlh); |
dd7669a9 PNA |
562 | err = nfnetlink_send(skb, item->pid, group, item->report, GFP_ATOMIC); |
563 | if (err == -ENOBUFS || err == -EAGAIN) | |
564 | return -ENOBUFS; | |
565 | ||
e34d5c1a | 566 | return 0; |
c1d10adb | 567 | |
df6fb868 | 568 | nla_put_failure: |
528a3a6f | 569 | rcu_read_unlock(); |
96bcf938 | 570 | nlmsg_cancel(skb, nlh); |
528a3a6f | 571 | nlmsg_failure: |
c1d10adb | 572 | kfree_skb(skb); |
150ace0d PNA |
573 | errout: |
574 | nfnetlink_set_err(0, group, -ENOBUFS); | |
e34d5c1a | 575 | return 0; |
c1d10adb PNA |
576 | } |
577 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
578 | ||
579 | static int ctnetlink_done(struct netlink_callback *cb) | |
580 | { | |
89f2e218 PM |
581 | if (cb->args[1]) |
582 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
583 | return 0; |
584 | } | |
585 | ||
586 | static int | |
587 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
588 | { | |
89f2e218 | 589 | struct nf_conn *ct, *last; |
c1d10adb | 590 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 591 | struct hlist_nulls_node *n; |
96bcf938 | 592 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 593 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 594 | |
76507f69 | 595 | rcu_read_lock(); |
d205dc40 | 596 | last = (struct nf_conn *)cb->args[1]; |
89f2e218 PM |
597 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
598 | restart: | |
ea781f19 ED |
599 | hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
600 | hnnode) { | |
5b1158e9 | 601 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
602 | continue; |
603 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
604 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
605 | continue; | |
87711cb8 PNA |
606 | /* Dump entries of a given L3 protocol number. |
607 | * If it is not specified, ie. l3proto == 0, | |
608 | * then dump everything. */ | |
5e8fbe2a | 609 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 610 | goto releasect; |
d205dc40 PM |
611 | if (cb->args[1]) { |
612 | if (ct != last) | |
ea781f19 | 613 | goto releasect; |
d205dc40 | 614 | cb->args[1] = 0; |
89f2e218 | 615 | } |
c1d10adb | 616 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 617 | cb->nlh->nlmsg_seq, |
8b0a231d | 618 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
89f2e218 | 619 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 620 | goto out; |
89f2e218 | 621 | } |
58401572 | 622 | |
01f34848 | 623 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
624 | IPCTNL_MSG_CT_GET_CTRZERO) { |
625 | struct nf_conn_counter *acct; | |
626 | ||
627 | acct = nf_conn_acct_find(ct); | |
628 | if (acct) | |
629 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
630 | } | |
ea781f19 ED |
631 | releasect: |
632 | nf_ct_put(ct); | |
89f2e218 | 633 | } |
d205dc40 | 634 | if (cb->args[1]) { |
89f2e218 PM |
635 | cb->args[1] = 0; |
636 | goto restart; | |
c1d10adb PNA |
637 | } |
638 | } | |
89f2e218 | 639 | out: |
76507f69 | 640 | rcu_read_unlock(); |
d205dc40 PM |
641 | if (last) |
642 | nf_ct_put(last); | |
c1d10adb | 643 | |
c1d10adb PNA |
644 | return skb->len; |
645 | } | |
646 | ||
c1d10adb | 647 | static inline int |
df6fb868 | 648 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 649 | { |
df6fb868 | 650 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
651 | struct nf_conntrack_l3proto *l3proto; |
652 | int ret = 0; | |
653 | ||
df6fb868 | 654 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 655 | |
cd91566e FW |
656 | rcu_read_lock(); |
657 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 658 | |
f73e924c PM |
659 | if (likely(l3proto->nlattr_to_tuple)) { |
660 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
661 | l3proto->nla_policy); | |
662 | if (ret == 0) | |
663 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
664 | } | |
c1d10adb | 665 | |
cd91566e | 666 | rcu_read_unlock(); |
c1d10adb | 667 | |
c1d10adb PNA |
668 | return ret; |
669 | } | |
670 | ||
f73e924c PM |
671 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
672 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
673 | }; |
674 | ||
675 | static inline int | |
df6fb868 | 676 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
677 | struct nf_conntrack_tuple *tuple) |
678 | { | |
df6fb868 | 679 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 680 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
681 | int ret = 0; |
682 | ||
f73e924c PM |
683 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
684 | if (ret < 0) | |
685 | return ret; | |
c1d10adb | 686 | |
df6fb868 | 687 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 688 | return -EINVAL; |
77236b6e | 689 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 690 | |
cd91566e FW |
691 | rcu_read_lock(); |
692 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 693 | |
f73e924c PM |
694 | if (likely(l4proto->nlattr_to_tuple)) { |
695 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
696 | l4proto->nla_policy); | |
697 | if (ret == 0) | |
698 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
699 | } | |
c1d10adb | 700 | |
cd91566e | 701 | rcu_read_unlock(); |
601e68e1 | 702 | |
c1d10adb PNA |
703 | return ret; |
704 | } | |
705 | ||
bb5cf80e | 706 | static int |
df6fb868 | 707 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
c1d10adb PNA |
708 | enum ctattr_tuple type, u_int8_t l3num) |
709 | { | |
df6fb868 | 710 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
711 | int err; |
712 | ||
c1d10adb PNA |
713 | memset(tuple, 0, sizeof(*tuple)); |
714 | ||
df6fb868 | 715 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
c1d10adb | 716 | |
df6fb868 | 717 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
718 | return -EINVAL; |
719 | ||
720 | tuple->src.l3num = l3num; | |
721 | ||
df6fb868 | 722 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
723 | if (err < 0) |
724 | return err; | |
725 | ||
df6fb868 | 726 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
727 | return -EINVAL; |
728 | ||
df6fb868 | 729 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
730 | if (err < 0) |
731 | return err; | |
732 | ||
733 | /* orig and expect tuples get DIR_ORIGINAL */ | |
734 | if (type == CTA_TUPLE_REPLY) | |
735 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
736 | else | |
737 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
738 | ||
c1d10adb PNA |
739 | return 0; |
740 | } | |
741 | ||
c1d10adb | 742 | static inline int |
df6fb868 | 743 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
c1d10adb | 744 | { |
df6fb868 | 745 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 746 | |
df6fb868 | 747 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
c1d10adb | 748 | |
df6fb868 | 749 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
750 | return -EINVAL; |
751 | ||
df6fb868 | 752 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
753 | |
754 | return 0; | |
755 | } | |
756 | ||
f73e924c PM |
757 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
758 | [CTA_STATUS] = { .type = NLA_U32 }, | |
759 | [CTA_TIMEOUT] = { .type = NLA_U32 }, | |
760 | [CTA_MARK] = { .type = NLA_U32 }, | |
761 | [CTA_USE] = { .type = NLA_U32 }, | |
762 | [CTA_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
763 | }; |
764 | ||
765 | static int | |
601e68e1 | 766 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 767 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
768 | { |
769 | struct nf_conntrack_tuple_hash *h; | |
770 | struct nf_conntrack_tuple tuple; | |
771 | struct nf_conn *ct; | |
96bcf938 | 772 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
773 | u_int8_t u3 = nfmsg->nfgen_family; |
774 | int err = 0; | |
775 | ||
df6fb868 | 776 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 777 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 778 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
779 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
780 | else { | |
781 | /* Flush the whole table */ | |
274d383b PNA |
782 | nf_conntrack_flush_report(&init_net, |
783 | NETLINK_CB(skb).pid, | |
784 | nlmsg_report(nlh)); | |
c1d10adb PNA |
785 | return 0; |
786 | } | |
787 | ||
788 | if (err < 0) | |
789 | return err; | |
790 | ||
400dad39 | 791 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 792 | if (!h) |
c1d10adb | 793 | return -ENOENT; |
c1d10adb PNA |
794 | |
795 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 796 | |
df6fb868 | 797 | if (cda[CTA_ID]) { |
77236b6e | 798 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 799 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
800 | nf_ct_put(ct); |
801 | return -ENOENT; | |
802 | } | |
601e68e1 | 803 | } |
c1d10adb | 804 | |
dd7669a9 PNA |
805 | if (nf_conntrack_event_report(IPCT_DESTROY, ct, |
806 | NETLINK_CB(skb).pid, | |
807 | nlmsg_report(nlh)) < 0) { | |
808 | nf_ct_delete_from_lists(ct); | |
809 | /* we failed to report the event, try later */ | |
810 | nf_ct_insert_dying_list(ct); | |
811 | nf_ct_put(ct); | |
812 | return 0; | |
813 | } | |
19abb7b0 PNA |
814 | |
815 | /* death_by_timeout would report the event again */ | |
816 | set_bit(IPS_DYING_BIT, &ct->status); | |
817 | ||
51091764 | 818 | nf_ct_kill(ct); |
c1d10adb | 819 | nf_ct_put(ct); |
c1d10adb PNA |
820 | |
821 | return 0; | |
822 | } | |
823 | ||
824 | static int | |
601e68e1 | 825 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 826 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
827 | { |
828 | struct nf_conntrack_tuple_hash *h; | |
829 | struct nf_conntrack_tuple tuple; | |
830 | struct nf_conn *ct; | |
831 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 832 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
833 | u_int8_t u3 = nfmsg->nfgen_family; |
834 | int err = 0; | |
835 | ||
58401572 | 836 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
837 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
838 | ctnetlink_done); | |
c1d10adb | 839 | |
df6fb868 | 840 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 841 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 842 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
843 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
844 | else | |
845 | return -EINVAL; | |
846 | ||
847 | if (err < 0) | |
848 | return err; | |
849 | ||
400dad39 | 850 | h = nf_conntrack_find_get(&init_net, &tuple); |
9ea8cfd6 | 851 | if (!h) |
c1d10adb | 852 | return -ENOENT; |
9ea8cfd6 | 853 | |
c1d10adb PNA |
854 | ct = nf_ct_tuplehash_to_ctrack(h); |
855 | ||
856 | err = -ENOMEM; | |
96bcf938 PNA |
857 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
858 | if (skb2 == NULL) { | |
c1d10adb PNA |
859 | nf_ct_put(ct); |
860 | return -ENOMEM; | |
861 | } | |
c1d10adb | 862 | |
528a3a6f | 863 | rcu_read_lock(); |
601e68e1 | 864 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
8b0a231d | 865 | IPCTNL_MSG_CT_NEW, ct); |
528a3a6f | 866 | rcu_read_unlock(); |
c1d10adb PNA |
867 | nf_ct_put(ct); |
868 | if (err <= 0) | |
869 | goto free; | |
870 | ||
871 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
872 | if (err < 0) | |
873 | goto out; | |
874 | ||
c1d10adb PNA |
875 | return 0; |
876 | ||
877 | free: | |
878 | kfree_skb(skb2); | |
879 | out: | |
880 | return err; | |
881 | } | |
882 | ||
67671841 | 883 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
884 | static int |
885 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
886 | enum nf_nat_manip_type manip, | |
887 | struct nlattr *attr) | |
888 | { | |
889 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
890 | ||
891 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
892 | if (!parse_nat_setup) { | |
95a5afca | 893 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 894 | rcu_read_unlock(); |
748085fc | 895 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
896 | nfnl_unlock(); |
897 | if (request_module("nf-nat-ipv4") < 0) { | |
898 | nfnl_lock(); | |
748085fc | 899 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
900 | rcu_read_lock(); |
901 | return -EOPNOTSUPP; | |
902 | } | |
903 | nfnl_lock(); | |
748085fc | 904 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
905 | rcu_read_lock(); |
906 | if (nfnetlink_parse_nat_setup_hook) | |
907 | return -EAGAIN; | |
908 | #endif | |
909 | return -EOPNOTSUPP; | |
910 | } | |
911 | ||
912 | return parse_nat_setup(ct, manip, attr); | |
913 | } | |
67671841 | 914 | #endif |
e6a7d3c0 | 915 | |
bb5cf80e | 916 | static int |
df6fb868 | 917 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
918 | { |
919 | unsigned long d; | |
77236b6e | 920 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
921 | d = ct->status ^ status; |
922 | ||
923 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
924 | /* unchangeable */ | |
0adf9d67 | 925 | return -EBUSY; |
601e68e1 | 926 | |
c1d10adb PNA |
927 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
928 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 929 | return -EBUSY; |
601e68e1 | 930 | |
c1d10adb PNA |
931 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
932 | /* ASSURED bit can only be set */ | |
0adf9d67 | 933 | return -EBUSY; |
c1d10adb | 934 | |
c1d10adb PNA |
935 | /* Be careful here, modifying NAT bits can screw up things, |
936 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 937 | * nf_nat_range. */ |
c1d10adb PNA |
938 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
939 | return 0; | |
940 | } | |
941 | ||
e6a7d3c0 PNA |
942 | static int |
943 | ctnetlink_change_nat(struct nf_conn *ct, struct nlattr *cda[]) | |
944 | { | |
945 | #ifdef CONFIG_NF_NAT_NEEDED | |
946 | int ret; | |
947 | ||
948 | if (cda[CTA_NAT_DST]) { | |
949 | ret = ctnetlink_parse_nat_setup(ct, | |
950 | IP_NAT_MANIP_DST, | |
951 | cda[CTA_NAT_DST]); | |
952 | if (ret < 0) | |
953 | return ret; | |
954 | } | |
955 | if (cda[CTA_NAT_SRC]) { | |
956 | ret = ctnetlink_parse_nat_setup(ct, | |
957 | IP_NAT_MANIP_SRC, | |
958 | cda[CTA_NAT_SRC]); | |
959 | if (ret < 0) | |
960 | return ret; | |
961 | } | |
962 | return 0; | |
963 | #else | |
964 | return -EOPNOTSUPP; | |
965 | #endif | |
966 | } | |
c1d10adb PNA |
967 | |
968 | static inline int | |
df6fb868 | 969 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
970 | { |
971 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 972 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 973 | char *helpname = NULL; |
c1d10adb PNA |
974 | int err; |
975 | ||
c1d10adb PNA |
976 | /* don't change helper of sibling connections */ |
977 | if (ct->master) | |
0adf9d67 | 978 | return -EBUSY; |
c1d10adb | 979 | |
df6fb868 | 980 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
981 | if (err < 0) |
982 | return err; | |
983 | ||
df293bbb YK |
984 | if (!strcmp(helpname, "")) { |
985 | if (help && help->helper) { | |
c1d10adb PNA |
986 | /* we had a helper before ... */ |
987 | nf_ct_remove_expectations(ct); | |
3c158f7f | 988 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 989 | } |
df293bbb YK |
990 | |
991 | return 0; | |
c1d10adb | 992 | } |
601e68e1 | 993 | |
df293bbb | 994 | helper = __nf_conntrack_helper_find_byname(helpname); |
226c0c0e PNA |
995 | if (helper == NULL) { |
996 | #ifdef CONFIG_MODULES | |
997 | spin_unlock_bh(&nf_conntrack_lock); | |
998 | ||
999 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1000 | spin_lock_bh(&nf_conntrack_lock); | |
1001 | return -EOPNOTSUPP; | |
1002 | } | |
1003 | ||
1004 | spin_lock_bh(&nf_conntrack_lock); | |
1005 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1006 | if (helper) | |
1007 | return -EAGAIN; | |
1008 | #endif | |
0adf9d67 | 1009 | return -EOPNOTSUPP; |
226c0c0e | 1010 | } |
df293bbb | 1011 | |
ceceae1b YK |
1012 | if (help) { |
1013 | if (help->helper == helper) | |
1014 | return 0; | |
1015 | if (help->helper) | |
1016 | return -EBUSY; | |
1017 | /* need to zero data of old helper */ | |
1018 | memset(&help->help, 0, sizeof(help->help)); | |
1019 | } else { | |
fab00c5d | 1020 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
ceceae1b YK |
1021 | if (help == NULL) |
1022 | return -ENOMEM; | |
1023 | } | |
df293bbb | 1024 | |
3c158f7f | 1025 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
1026 | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static inline int | |
df6fb868 | 1031 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1032 | { |
77236b6e | 1033 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1034 | |
c1d10adb PNA |
1035 | if (!del_timer(&ct->timeout)) |
1036 | return -ETIME; | |
1037 | ||
1038 | ct->timeout.expires = jiffies + timeout * HZ; | |
1039 | add_timer(&ct->timeout); | |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | static inline int | |
df6fb868 | 1045 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb | 1046 | { |
df6fb868 | 1047 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
605dcad6 | 1048 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1049 | int err = 0; |
1050 | ||
df6fb868 | 1051 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
c1d10adb | 1052 | |
cd91566e FW |
1053 | rcu_read_lock(); |
1054 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1055 | if (l4proto->from_nlattr) |
1056 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1057 | rcu_read_unlock(); |
c1d10adb PNA |
1058 | |
1059 | return err; | |
1060 | } | |
1061 | ||
13eae15a PNA |
1062 | #ifdef CONFIG_NF_NAT_NEEDED |
1063 | static inline int | |
1064 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) | |
1065 | { | |
1066 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1067 | ||
1068 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); | |
1069 | ||
1070 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1071 | return -EINVAL; | |
1072 | ||
1073 | natseq->correction_pos = | |
77236b6e | 1074 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1075 | |
1076 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1077 | return -EINVAL; | |
1078 | ||
1079 | natseq->offset_before = | |
77236b6e | 1080 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1081 | |
1082 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1083 | return -EINVAL; | |
1084 | ||
1085 | natseq->offset_after = | |
77236b6e | 1086 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1087 | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | static int | |
1092 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) | |
1093 | { | |
1094 | int ret = 0; | |
1095 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1096 | ||
1097 | if (!nat) | |
1098 | return 0; | |
1099 | ||
1100 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1101 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1102 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1103 | if (ret < 0) | |
1104 | return ret; | |
1105 | ||
1106 | ct->status |= IPS_SEQ_ADJUST; | |
1107 | } | |
1108 | ||
1109 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1110 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1111 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1112 | if (ret < 0) | |
1113 | return ret; | |
1114 | ||
1115 | ct->status |= IPS_SEQ_ADJUST; | |
1116 | } | |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | #endif | |
1121 | ||
c1d10adb | 1122 | static int |
df6fb868 | 1123 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
c1d10adb PNA |
1124 | { |
1125 | int err; | |
1126 | ||
e098360f PNA |
1127 | /* only allow NAT changes and master assignation for new conntracks */ |
1128 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1129 | return -EOPNOTSUPP; | |
1130 | ||
df6fb868 | 1131 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1132 | err = ctnetlink_change_helper(ct, cda); |
1133 | if (err < 0) | |
1134 | return err; | |
1135 | } | |
1136 | ||
df6fb868 | 1137 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1138 | err = ctnetlink_change_timeout(ct, cda); |
1139 | if (err < 0) | |
1140 | return err; | |
1141 | } | |
1142 | ||
df6fb868 | 1143 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1144 | err = ctnetlink_change_status(ct, cda); |
1145 | if (err < 0) | |
1146 | return err; | |
1147 | } | |
1148 | ||
df6fb868 | 1149 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1150 | err = ctnetlink_change_protoinfo(ct, cda); |
1151 | if (err < 0) | |
1152 | return err; | |
1153 | } | |
1154 | ||
bcd1e830 | 1155 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1156 | if (cda[CTA_MARK]) |
77236b6e | 1157 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1158 | #endif |
1159 | ||
13eae15a PNA |
1160 | #ifdef CONFIG_NF_NAT_NEEDED |
1161 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1162 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1163 | if (err < 0) | |
1164 | return err; | |
1165 | } | |
1166 | #endif | |
1167 | ||
c1d10adb PNA |
1168 | return 0; |
1169 | } | |
1170 | ||
f0a3c086 | 1171 | static struct nf_conn * |
df6fb868 | 1172 | ctnetlink_create_conntrack(struct nlattr *cda[], |
c1d10adb | 1173 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1174 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1175 | u8 u3) |
c1d10adb PNA |
1176 | { |
1177 | struct nf_conn *ct; | |
1178 | int err = -EINVAL; | |
ceceae1b | 1179 | struct nf_conntrack_helper *helper; |
c1d10adb | 1180 | |
b54ad409 | 1181 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1182 | if (IS_ERR(ct)) |
f0a3c086 | 1183 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1184 | |
df6fb868 | 1185 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1186 | goto err1; |
77236b6e | 1187 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1188 | |
1189 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
1190 | ct->status |= IPS_CONFIRMED; | |
1191 | ||
1575e7ea | 1192 | rcu_read_lock(); |
226c0c0e | 1193 | if (cda[CTA_HELP]) { |
29fe1b48 | 1194 | char *helpname = NULL; |
226c0c0e PNA |
1195 | |
1196 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1197 | if (err < 0) |
1198 | goto err2; | |
226c0c0e PNA |
1199 | |
1200 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1201 | if (helper == NULL) { | |
1202 | rcu_read_unlock(); | |
1203 | #ifdef CONFIG_MODULES | |
1204 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1205 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1206 | goto err1; |
226c0c0e PNA |
1207 | } |
1208 | ||
1209 | rcu_read_lock(); | |
1210 | helper = __nf_conntrack_helper_find_byname(helpname); | |
1211 | if (helper) { | |
226c0c0e | 1212 | err = -EAGAIN; |
0f5b3e85 | 1213 | goto err2; |
226c0c0e PNA |
1214 | } |
1215 | rcu_read_unlock(); | |
1216 | #endif | |
1217 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1218 | goto err1; |
226c0c0e PNA |
1219 | } else { |
1220 | struct nf_conn_help *help; | |
1221 | ||
1222 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1223 | if (help == NULL) { | |
226c0c0e | 1224 | err = -ENOMEM; |
0f5b3e85 | 1225 | goto err2; |
226c0c0e PNA |
1226 | } |
1227 | ||
1228 | /* not in hash table yet so not strictly necessary */ | |
1229 | rcu_assign_pointer(help->helper, helper); | |
1230 | } | |
1231 | } else { | |
1232 | /* try an implicit helper assignation */ | |
1233 | err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); | |
0f5b3e85 PM |
1234 | if (err < 0) |
1235 | goto err2; | |
1575e7ea PNA |
1236 | } |
1237 | ||
df6fb868 | 1238 | if (cda[CTA_STATUS]) { |
bbb3357d | 1239 | err = ctnetlink_change_status(ct, cda); |
0f5b3e85 PM |
1240 | if (err < 0) |
1241 | goto err2; | |
e6a7d3c0 PNA |
1242 | } |
1243 | ||
1244 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { | |
1245 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1246 | if (err < 0) |
1247 | goto err2; | |
bbb3357d | 1248 | } |
c1d10adb | 1249 | |
c969aa7d PNA |
1250 | #ifdef CONFIG_NF_NAT_NEEDED |
1251 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1252 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1253 | if (err < 0) |
1254 | goto err2; | |
c969aa7d PNA |
1255 | } |
1256 | #endif | |
1257 | ||
df6fb868 | 1258 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1259 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1260 | if (err < 0) |
1261 | goto err2; | |
c1d10adb PNA |
1262 | } |
1263 | ||
3ec19255 | 1264 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
a0891aa6 | 1265 | nf_ct_ecache_ext_add(ct, GFP_ATOMIC); |
58401572 | 1266 | |
bcd1e830 | 1267 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1268 | if (cda[CTA_MARK]) |
77236b6e | 1269 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1270 | #endif |
1271 | ||
5faa1f4c | 1272 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1273 | if (cda[CTA_TUPLE_MASTER]) { |
1274 | struct nf_conntrack_tuple master; | |
1275 | struct nf_conntrack_tuple_hash *master_h; | |
1276 | struct nf_conn *master_ct; | |
1277 | ||
1278 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1279 | if (err < 0) | |
0f5b3e85 | 1280 | goto err2; |
7ec47496 | 1281 | |
ea781f19 | 1282 | master_h = nf_conntrack_find_get(&init_net, &master); |
7ec47496 PNA |
1283 | if (master_h == NULL) { |
1284 | err = -ENOENT; | |
0f5b3e85 | 1285 | goto err2; |
7ec47496 PNA |
1286 | } |
1287 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1288 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1289 | ct->master = master_ct; |
f2a89004 | 1290 | } |
5faa1f4c | 1291 | |
c1d10adb PNA |
1292 | add_timer(&ct->timeout); |
1293 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1294 | rcu_read_unlock(); |
dafc741c | 1295 | |
f0a3c086 | 1296 | return ct; |
c1d10adb | 1297 | |
0f5b3e85 PM |
1298 | err2: |
1299 | rcu_read_unlock(); | |
1300 | err1: | |
c1d10adb | 1301 | nf_conntrack_free(ct); |
f0a3c086 | 1302 | return ERR_PTR(err); |
c1d10adb PNA |
1303 | } |
1304 | ||
601e68e1 YH |
1305 | static int |
1306 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1307 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1308 | { |
1309 | struct nf_conntrack_tuple otuple, rtuple; | |
1310 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1311 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1312 | u_int8_t u3 = nfmsg->nfgen_family; |
1313 | int err = 0; | |
1314 | ||
df6fb868 | 1315 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1316 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1317 | if (err < 0) | |
1318 | return err; | |
1319 | } | |
1320 | ||
df6fb868 | 1321 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1322 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1323 | if (err < 0) | |
1324 | return err; | |
1325 | } | |
1326 | ||
f8ba1aff | 1327 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1328 | if (cda[CTA_TUPLE_ORIG]) |
400dad39 | 1329 | h = __nf_conntrack_find(&init_net, &otuple); |
df6fb868 | 1330 | else if (cda[CTA_TUPLE_REPLY]) |
400dad39 | 1331 | h = __nf_conntrack_find(&init_net, &rtuple); |
c1d10adb PNA |
1332 | |
1333 | if (h == NULL) { | |
c1d10adb | 1334 | err = -ENOENT; |
f0a3c086 PNA |
1335 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1336 | struct nf_conn *ct; | |
fecc1133 | 1337 | enum ip_conntrack_events events; |
5faa1f4c | 1338 | |
f0a3c086 PNA |
1339 | ct = ctnetlink_create_conntrack(cda, &otuple, |
1340 | &rtuple, u3); | |
1341 | if (IS_ERR(ct)) { | |
1342 | err = PTR_ERR(ct); | |
5faa1f4c PNA |
1343 | goto out_unlock; |
1344 | } | |
f0a3c086 PNA |
1345 | err = 0; |
1346 | nf_conntrack_get(&ct->ct_general); | |
1347 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1348 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1349 | events = IPCT_RELATED; | |
1350 | else | |
1351 | events = IPCT_NEW; | |
1352 | ||
a0891aa6 PNA |
1353 | nf_conntrack_eventmask_report((1 << IPCT_STATUS) | |
1354 | (1 << IPCT_HELPER) | | |
1355 | (1 << IPCT_PROTOINFO) | | |
1356 | (1 << IPCT_NATSEQADJ) | | |
1357 | (1 << IPCT_MARK) | events, | |
1358 | ct, NETLINK_CB(skb).pid, | |
1359 | nlmsg_report(nlh)); | |
f0a3c086 PNA |
1360 | nf_ct_put(ct); |
1361 | } else | |
1362 | spin_unlock_bh(&nf_conntrack_lock); | |
5faa1f4c | 1363 | |
c1d10adb PNA |
1364 | return err; |
1365 | } | |
1366 | /* implicit 'else' */ | |
1367 | ||
c1d10adb PNA |
1368 | /* We manipulate the conntrack inside the global conntrack table lock, |
1369 | * so there's no need to increase the refcount */ | |
c1d10adb | 1370 | err = -EEXIST; |
ff4ca827 | 1371 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1372 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1373 | ||
19abb7b0 PNA |
1374 | err = ctnetlink_change_conntrack(ct, cda); |
1375 | if (err == 0) { | |
1376 | nf_conntrack_get(&ct->ct_general); | |
1377 | spin_unlock_bh(&nf_conntrack_lock); | |
a0891aa6 PNA |
1378 | nf_conntrack_eventmask_report((1 << IPCT_STATUS) | |
1379 | (1 << IPCT_HELPER) | | |
1380 | (1 << IPCT_PROTOINFO) | | |
1381 | (1 << IPCT_NATSEQADJ) | | |
1382 | (1 << IPCT_MARK), | |
1383 | ct, NETLINK_CB(skb).pid, | |
1384 | nlmsg_report(nlh)); | |
19abb7b0 PNA |
1385 | nf_ct_put(ct); |
1386 | } else | |
1387 | spin_unlock_bh(&nf_conntrack_lock); | |
1388 | ||
1389 | return err; | |
ff4ca827 | 1390 | } |
c1d10adb PNA |
1391 | |
1392 | out_unlock: | |
f8ba1aff | 1393 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1394 | return err; |
1395 | } | |
1396 | ||
601e68e1 YH |
1397 | /*********************************************************************** |
1398 | * EXPECT | |
1399 | ***********************************************************************/ | |
c1d10adb PNA |
1400 | |
1401 | static inline int | |
1402 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1403 | const struct nf_conntrack_tuple *tuple, | |
1404 | enum ctattr_expect type) | |
1405 | { | |
df6fb868 | 1406 | struct nlattr *nest_parms; |
601e68e1 | 1407 | |
df6fb868 PM |
1408 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1409 | if (!nest_parms) | |
1410 | goto nla_put_failure; | |
c1d10adb | 1411 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1412 | goto nla_put_failure; |
1413 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1414 | |
1415 | return 0; | |
1416 | ||
df6fb868 | 1417 | nla_put_failure: |
c1d10adb | 1418 | return -1; |
601e68e1 | 1419 | } |
c1d10adb | 1420 | |
1cde6436 PNA |
1421 | static inline int |
1422 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1423 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1424 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1425 | { |
1426 | int ret; | |
1427 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1428 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1429 | struct nf_conntrack_tuple m; |
df6fb868 | 1430 | struct nlattr *nest_parms; |
d4156e8c PM |
1431 | |
1432 | memset(&m, 0xFF, sizeof(m)); | |
1433 | m.src.u.all = mask->src.u.all; | |
1434 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); | |
1435 | ||
df6fb868 PM |
1436 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1437 | if (!nest_parms) | |
1438 | goto nla_put_failure; | |
1cde6436 | 1439 | |
528a3a6f | 1440 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1441 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1442 | |
1443 | if (unlikely(ret < 0)) | |
df6fb868 | 1444 | goto nla_put_failure; |
1cde6436 | 1445 | |
528a3a6f | 1446 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1447 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1448 | if (unlikely(ret < 0)) |
df6fb868 | 1449 | goto nla_put_failure; |
1cde6436 | 1450 | |
df6fb868 | 1451 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1452 | |
1453 | return 0; | |
1454 | ||
df6fb868 | 1455 | nla_put_failure: |
1cde6436 PNA |
1456 | return -1; |
1457 | } | |
1458 | ||
bb5cf80e | 1459 | static int |
c1d10adb | 1460 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1461 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1462 | { |
1463 | struct nf_conn *master = exp->master; | |
d978e5da PM |
1464 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1465 | ||
1466 | if (timeout < 0) | |
1467 | timeout = 0; | |
c1d10adb PNA |
1468 | |
1469 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1470 | goto nla_put_failure; |
1cde6436 | 1471 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1472 | goto nla_put_failure; |
c1d10adb PNA |
1473 | if (ctnetlink_exp_dump_tuple(skb, |
1474 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1475 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1476 | goto nla_put_failure; |
601e68e1 | 1477 | |
d978e5da | 1478 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1479 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
c1d10adb PNA |
1480 | |
1481 | return 0; | |
601e68e1 | 1482 | |
df6fb868 | 1483 | nla_put_failure: |
c1d10adb PNA |
1484 | return -1; |
1485 | } | |
1486 | ||
1487 | static int | |
1488 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 1489 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1490 | { |
1491 | struct nlmsghdr *nlh; | |
1492 | struct nfgenmsg *nfmsg; | |
96bcf938 | 1493 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
1494 | |
1495 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
96bcf938 PNA |
1496 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
1497 | if (nlh == NULL) | |
1498 | goto nlmsg_failure; | |
c1d10adb | 1499 | |
96bcf938 | 1500 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1501 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1502 | nfmsg->version = NFNETLINK_V0; | |
1503 | nfmsg->res_id = 0; | |
1504 | ||
1505 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1506 | goto nla_put_failure; |
c1d10adb | 1507 | |
96bcf938 | 1508 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
1509 | return skb->len; |
1510 | ||
1511 | nlmsg_failure: | |
df6fb868 | 1512 | nla_put_failure: |
96bcf938 | 1513 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
1514 | return -1; |
1515 | } | |
1516 | ||
1517 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
1518 | static int |
1519 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb PNA |
1520 | { |
1521 | struct nlmsghdr *nlh; | |
1522 | struct nfgenmsg *nfmsg; | |
19abb7b0 | 1523 | struct nf_conntrack_expect *exp = item->exp; |
c1d10adb PNA |
1524 | struct sk_buff *skb; |
1525 | unsigned int type; | |
c1d10adb PNA |
1526 | int flags = 0; |
1527 | ||
a0891aa6 | 1528 | if (events & (1 << IPEXP_NEW)) { |
c1d10adb PNA |
1529 | type = IPCTNL_MSG_EXP_NEW; |
1530 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1531 | } else | |
e34d5c1a | 1532 | return 0; |
c1d10adb | 1533 | |
1f9da256 PNA |
1534 | if (!item->report && |
1535 | !nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) | |
e34d5c1a | 1536 | return 0; |
b3a27bfb | 1537 | |
96bcf938 PNA |
1538 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1539 | if (skb == NULL) | |
150ace0d | 1540 | goto errout; |
c1d10adb | 1541 | |
b633ad5f | 1542 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
96bcf938 PNA |
1543 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
1544 | if (nlh == NULL) | |
1545 | goto nlmsg_failure; | |
c1d10adb | 1546 | |
96bcf938 | 1547 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1548 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1549 | nfmsg->version = NFNETLINK_V0; | |
1550 | nfmsg->res_id = 0; | |
1551 | ||
528a3a6f | 1552 | rcu_read_lock(); |
c1d10adb | 1553 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1554 | goto nla_put_failure; |
528a3a6f | 1555 | rcu_read_unlock(); |
c1d10adb | 1556 | |
96bcf938 | 1557 | nlmsg_end(skb, nlh); |
e34d5c1a PNA |
1558 | nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, |
1559 | item->report, GFP_ATOMIC); | |
1560 | return 0; | |
c1d10adb | 1561 | |
df6fb868 | 1562 | nla_put_failure: |
528a3a6f | 1563 | rcu_read_unlock(); |
96bcf938 | 1564 | nlmsg_cancel(skb, nlh); |
528a3a6f | 1565 | nlmsg_failure: |
c1d10adb | 1566 | kfree_skb(skb); |
150ace0d PNA |
1567 | errout: |
1568 | nfnetlink_set_err(0, 0, -ENOBUFS); | |
e34d5c1a | 1569 | return 0; |
c1d10adb PNA |
1570 | } |
1571 | #endif | |
cf6994c2 PM |
1572 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1573 | { | |
31f15875 PM |
1574 | if (cb->args[1]) |
1575 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1576 | return 0; |
1577 | } | |
c1d10adb PNA |
1578 | |
1579 | static int | |
1580 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1581 | { | |
9b03f38d | 1582 | struct net *net = &init_net; |
cf6994c2 | 1583 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 1584 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
31f15875 | 1585 | struct hlist_node *n; |
87711cb8 | 1586 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1587 | |
7d0742da | 1588 | rcu_read_lock(); |
31f15875 PM |
1589 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1590 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1591 | restart: |
9b03f38d | 1592 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1593 | hnode) { |
1594 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1595 | continue; |
31f15875 PM |
1596 | if (cb->args[1]) { |
1597 | if (exp != last) | |
1598 | continue; | |
1599 | cb->args[1] = 0; | |
1600 | } | |
8b0a231d PNA |
1601 | if (ctnetlink_exp_fill_info(skb, |
1602 | NETLINK_CB(cb->skb).pid, | |
31f15875 PM |
1603 | cb->nlh->nlmsg_seq, |
1604 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 1605 | exp) < 0) { |
7d0742da PM |
1606 | if (!atomic_inc_not_zero(&exp->use)) |
1607 | continue; | |
31f15875 PM |
1608 | cb->args[1] = (unsigned long)exp; |
1609 | goto out; | |
1610 | } | |
cf6994c2 | 1611 | } |
31f15875 PM |
1612 | if (cb->args[1]) { |
1613 | cb->args[1] = 0; | |
1614 | goto restart; | |
cf6994c2 PM |
1615 | } |
1616 | } | |
601e68e1 | 1617 | out: |
7d0742da | 1618 | rcu_read_unlock(); |
cf6994c2 PM |
1619 | if (last) |
1620 | nf_ct_expect_put(last); | |
c1d10adb | 1621 | |
c1d10adb PNA |
1622 | return skb->len; |
1623 | } | |
1624 | ||
f73e924c PM |
1625 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
1626 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
1627 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
c1d10adb PNA |
1628 | }; |
1629 | ||
1630 | static int | |
601e68e1 | 1631 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1632 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1633 | { |
1634 | struct nf_conntrack_tuple tuple; | |
1635 | struct nf_conntrack_expect *exp; | |
1636 | struct sk_buff *skb2; | |
96bcf938 | 1637 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1638 | u_int8_t u3 = nfmsg->nfgen_family; |
1639 | int err = 0; | |
1640 | ||
c1d10adb | 1641 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1642 | return netlink_dump_start(ctnl, skb, nlh, |
1643 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1644 | ctnetlink_exp_done); |
c1d10adb PNA |
1645 | } |
1646 | ||
df6fb868 | 1647 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1648 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1649 | else | |
1650 | return -EINVAL; | |
1651 | ||
1652 | if (err < 0) | |
1653 | return err; | |
1654 | ||
9b03f38d | 1655 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1656 | if (!exp) |
1657 | return -ENOENT; | |
1658 | ||
df6fb868 | 1659 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1660 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1661 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1662 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1663 | return -ENOENT; |
1664 | } | |
601e68e1 | 1665 | } |
c1d10adb PNA |
1666 | |
1667 | err = -ENOMEM; | |
96bcf938 PNA |
1668 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1669 | if (skb2 == NULL) | |
c1d10adb | 1670 | goto out; |
4e9b8269 | 1671 | |
528a3a6f | 1672 | rcu_read_lock(); |
601e68e1 | 1673 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
8b0a231d | 1674 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 1675 | rcu_read_unlock(); |
c1d10adb PNA |
1676 | if (err <= 0) |
1677 | goto free; | |
1678 | ||
6823645d | 1679 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1680 | |
1681 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1682 | ||
1683 | free: | |
1684 | kfree_skb(skb2); | |
1685 | out: | |
6823645d | 1686 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1687 | return err; |
1688 | } | |
1689 | ||
1690 | static int | |
601e68e1 | 1691 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
df6fb868 | 1692 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb | 1693 | { |
31f15875 | 1694 | struct nf_conntrack_expect *exp; |
c1d10adb PNA |
1695 | struct nf_conntrack_tuple tuple; |
1696 | struct nf_conntrack_helper *h; | |
96bcf938 | 1697 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
31f15875 | 1698 | struct hlist_node *n, *next; |
c1d10adb | 1699 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1700 | unsigned int i; |
c1d10adb PNA |
1701 | int err; |
1702 | ||
df6fb868 | 1703 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb PNA |
1704 | /* delete a single expect by tuple */ |
1705 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1706 | if (err < 0) | |
1707 | return err; | |
1708 | ||
1709 | /* bump usage count to 2 */ | |
9b03f38d | 1710 | exp = nf_ct_expect_find_get(&init_net, &tuple); |
c1d10adb PNA |
1711 | if (!exp) |
1712 | return -ENOENT; | |
1713 | ||
df6fb868 | 1714 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1715 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1716 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1717 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1718 | return -ENOENT; |
1719 | } | |
1720 | } | |
1721 | ||
1722 | /* after list removal, usage count == 1 */ | |
6823645d | 1723 | nf_ct_unexpect_related(exp); |
601e68e1 | 1724 | /* have to put what we 'get' above. |
c1d10adb | 1725 | * after this line usage count == 0 */ |
6823645d | 1726 | nf_ct_expect_put(exp); |
df6fb868 PM |
1727 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1728 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1729 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1730 | |
1731 | /* delete all expectations for this helper */ | |
f8ba1aff | 1732 | spin_lock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1733 | h = __nf_conntrack_helper_find_byname(name); |
1734 | if (!h) { | |
f8ba1aff | 1735 | spin_unlock_bh(&nf_conntrack_lock); |
0adf9d67 | 1736 | return -EOPNOTSUPP; |
c1d10adb | 1737 | } |
31f15875 PM |
1738 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1739 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1740 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1741 | hnode) { |
1742 | m_help = nfct_help(exp->master); | |
1743 | if (m_help->helper == h | |
1744 | && del_timer(&exp->timeout)) { | |
1745 | nf_ct_unlink_expect(exp); | |
1746 | nf_ct_expect_put(exp); | |
1747 | } | |
c1d10adb PNA |
1748 | } |
1749 | } | |
f8ba1aff | 1750 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1751 | } else { |
1752 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1753 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1754 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1755 | hlist_for_each_entry_safe(exp, n, next, | |
9b03f38d | 1756 | &init_net.ct.expect_hash[i], |
31f15875 PM |
1757 | hnode) { |
1758 | if (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 | } |
1766 | ||
1767 | return 0; | |
1768 | } | |
1769 | static int | |
df6fb868 | 1770 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
c1d10adb PNA |
1771 | { |
1772 | return -EOPNOTSUPP; | |
1773 | } | |
1774 | ||
1775 | static int | |
19abb7b0 | 1776 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) |
c1d10adb PNA |
1777 | { |
1778 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1779 | struct nf_conntrack_tuple_hash *h = NULL; | |
1780 | struct nf_conntrack_expect *exp; | |
1781 | struct nf_conn *ct; | |
dc808fe2 | 1782 | struct nf_conn_help *help; |
c1d10adb PNA |
1783 | int err = 0; |
1784 | ||
c1d10adb PNA |
1785 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1786 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1787 | if (err < 0) | |
1788 | return err; | |
1789 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1790 | if (err < 0) | |
1791 | return err; | |
1792 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1793 | if (err < 0) | |
1794 | return err; | |
1795 | ||
1796 | /* Look for master conntrack of this expectation */ | |
400dad39 | 1797 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
c1d10adb PNA |
1798 | if (!h) |
1799 | return -ENOENT; | |
1800 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1801 | help = nfct_help(ct); |
c1d10adb | 1802 | |
dc808fe2 | 1803 | if (!help || !help->helper) { |
c1d10adb | 1804 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1805 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1806 | goto out; |
1807 | } | |
1808 | ||
6823645d | 1809 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1810 | if (!exp) { |
1811 | err = -ENOMEM; | |
1812 | goto out; | |
1813 | } | |
601e68e1 | 1814 | |
626ba8fb | 1815 | exp->class = 0; |
c1d10adb PNA |
1816 | exp->expectfn = NULL; |
1817 | exp->flags = 0; | |
1818 | exp->master = ct; | |
9457d851 | 1819 | exp->helper = NULL; |
c1d10adb | 1820 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1821 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1822 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1823 | |
19abb7b0 | 1824 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1825 | nf_ct_expect_put(exp); |
c1d10adb | 1826 | |
601e68e1 | 1827 | out: |
c1d10adb PNA |
1828 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1829 | return err; | |
1830 | } | |
1831 | ||
1832 | static int | |
1833 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 1834 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
c1d10adb PNA |
1835 | { |
1836 | struct nf_conntrack_tuple tuple; | |
1837 | struct nf_conntrack_expect *exp; | |
96bcf938 | 1838 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1839 | u_int8_t u3 = nfmsg->nfgen_family; |
1840 | int err = 0; | |
1841 | ||
df6fb868 PM |
1842 | if (!cda[CTA_EXPECT_TUPLE] |
1843 | || !cda[CTA_EXPECT_MASK] | |
1844 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1845 | return -EINVAL; |
1846 | ||
1847 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1848 | if (err < 0) | |
1849 | return err; | |
1850 | ||
f8ba1aff | 1851 | spin_lock_bh(&nf_conntrack_lock); |
9b03f38d | 1852 | exp = __nf_ct_expect_find(&init_net, &tuple); |
c1d10adb PNA |
1853 | |
1854 | if (!exp) { | |
f8ba1aff | 1855 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1856 | err = -ENOENT; |
19abb7b0 PNA |
1857 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1858 | err = ctnetlink_create_expect(cda, | |
1859 | u3, | |
1860 | NETLINK_CB(skb).pid, | |
1861 | nlmsg_report(nlh)); | |
1862 | } | |
c1d10adb PNA |
1863 | return err; |
1864 | } | |
1865 | ||
1866 | err = -EEXIST; | |
1867 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1868 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1869 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1870 | |
c1d10adb PNA |
1871 | return err; |
1872 | } | |
1873 | ||
1874 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
1875 | static struct nf_ct_event_notifier ctnl_notifier = { |
1876 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
1877 | }; |
1878 | ||
e34d5c1a PNA |
1879 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
1880 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
1881 | }; |
1882 | #endif | |
1883 | ||
7c8d4cb4 | 1884 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 1885 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
1886 | .attr_count = CTA_MAX, |
1887 | .policy = ct_nla_policy }, | |
c1d10adb | 1888 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1889 | .attr_count = CTA_MAX, |
1890 | .policy = ct_nla_policy }, | |
c1d10adb | 1891 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
1892 | .attr_count = CTA_MAX, |
1893 | .policy = ct_nla_policy }, | |
c1d10adb | 1894 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
1895 | .attr_count = CTA_MAX, |
1896 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
1897 | }; |
1898 | ||
7c8d4cb4 | 1899 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 1900 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
1901 | .attr_count = CTA_EXPECT_MAX, |
1902 | .policy = exp_nla_policy }, | |
c1d10adb | 1903 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
1904 | .attr_count = CTA_EXPECT_MAX, |
1905 | .policy = exp_nla_policy }, | |
c1d10adb | 1906 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
1907 | .attr_count = CTA_EXPECT_MAX, |
1908 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
1909 | }; |
1910 | ||
7c8d4cb4 | 1911 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
1912 | .name = "conntrack", |
1913 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
1914 | .cb_count = IPCTNL_MSG_MAX, | |
1915 | .cb = ctnl_cb, | |
1916 | }; | |
1917 | ||
7c8d4cb4 | 1918 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
1919 | .name = "conntrack_expect", |
1920 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
1921 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
1922 | .cb = ctnl_exp_cb, | |
1923 | }; | |
1924 | ||
d2483dde | 1925 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 1926 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 1927 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
1928 | |
1929 | static int __init ctnetlink_init(void) | |
1930 | { | |
1931 | int ret; | |
1932 | ||
1933 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
1934 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
1935 | if (ret < 0) { | |
1936 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
1937 | goto err_out; | |
1938 | } | |
1939 | ||
1940 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
1941 | if (ret < 0) { | |
1942 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
1943 | goto err_unreg_subsys; | |
1944 | } | |
1945 | ||
1946 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1947 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
1948 | if (ret < 0) { | |
1949 | printk("ctnetlink_init: cannot register notifier.\n"); | |
1950 | goto err_unreg_exp_subsys; | |
1951 | } | |
1952 | ||
6823645d | 1953 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1954 | if (ret < 0) { |
1955 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
1956 | goto err_unreg_notifier; | |
1957 | } | |
1958 | #endif | |
1959 | ||
1960 | return 0; | |
1961 | ||
1962 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1963 | err_unreg_notifier: | |
1964 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
1965 | err_unreg_exp_subsys: | |
1966 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1967 | #endif | |
1968 | err_unreg_subsys: | |
1969 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1970 | err_out: | |
1971 | return ret; | |
1972 | } | |
1973 | ||
1974 | static void __exit ctnetlink_exit(void) | |
1975 | { | |
1976 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
1977 | ||
1978 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 1979 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
1980 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
1981 | #endif | |
1982 | ||
1983 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
1984 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
1985 | return; | |
1986 | } | |
1987 | ||
1988 | module_init(ctnetlink_init); | |
1989 | module_exit(ctnetlink_exit); |