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