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Commit | Line | Data |
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c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
0adf9d67 | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
c1d10adb | 8 | * |
601e68e1 | 9 | * Initial connection tracking via netlink development funded and |
c1d10adb PNA |
10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
11 | * | |
12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) | |
13 | * | |
14 | * This software may be used and distributed according to the terms | |
15 | * of the GNU General Public License, incorporated herein by reference. | |
c1d10adb PNA |
16 | */ |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
711bbdd6 | 21 | #include <linux/rculist.h> |
ea781f19 | 22 | #include <linux/rculist_nulls.h> |
c1d10adb PNA |
23 | #include <linux/types.h> |
24 | #include <linux/timer.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/netlink.h> | |
28 | #include <linux/spinlock.h> | |
40a839fd | 29 | #include <linux/interrupt.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
c1d10adb PNA |
31 | |
32 | #include <linux/netfilter.h> | |
dc5fc579 | 33 | #include <net/netlink.h> |
9592a5c0 | 34 | #include <net/sock.h> |
c1d10adb PNA |
35 | #include <net/netfilter/nf_conntrack.h> |
36 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 37 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
38 | #include <net/netfilter/nf_conntrack_helper.h> |
39 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 40 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 41 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 42 | #include <net/netfilter/nf_conntrack_acct.h> |
ef00f89f | 43 | #include <net/netfilter/nf_conntrack_zones.h> |
5b1158e9 JK |
44 | #ifdef CONFIG_NF_NAT_NEEDED |
45 | #include <net/netfilter/nf_nat_core.h> | |
46 | #include <net/netfilter/nf_nat_protocol.h> | |
47 | #endif | |
c1d10adb PNA |
48 | |
49 | #include <linux/netfilter/nfnetlink.h> | |
50 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
51 | ||
52 | MODULE_LICENSE("GPL"); | |
53 | ||
dc808fe2 | 54 | static char __initdata version[] = "0.93"; |
c1d10adb | 55 | |
c1d10adb | 56 | static inline int |
601e68e1 | 57 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 58 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 59 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 60 | { |
c1d10adb | 61 | int ret = 0; |
df6fb868 | 62 | struct nlattr *nest_parms; |
c1d10adb | 63 | |
df6fb868 PM |
64 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
65 | if (!nest_parms) | |
66 | goto nla_put_failure; | |
77236b6e | 67 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 68 | |
fdf70832 PM |
69 | if (likely(l4proto->tuple_to_nlattr)) |
70 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 71 | |
df6fb868 | 72 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
73 | |
74 | return ret; | |
75 | ||
df6fb868 | 76 | nla_put_failure: |
c1d10adb PNA |
77 | return -1; |
78 | } | |
79 | ||
80 | static inline int | |
1cde6436 PNA |
81 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
82 | const struct nf_conntrack_tuple *tuple, | |
83 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 84 | { |
c1d10adb | 85 | int ret = 0; |
df6fb868 PM |
86 | struct nlattr *nest_parms; |
87 | ||
88 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
89 | if (!nest_parms) | |
90 | goto nla_put_failure; | |
1cde6436 | 91 | |
fdf70832 PM |
92 | if (likely(l3proto->tuple_to_nlattr)) |
93 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 94 | |
df6fb868 | 95 | nla_nest_end(skb, nest_parms); |
c1d10adb | 96 | |
1cde6436 PNA |
97 | return ret; |
98 | ||
df6fb868 | 99 | nla_put_failure: |
1cde6436 PNA |
100 | return -1; |
101 | } | |
102 | ||
bb5cf80e | 103 | static int |
1cde6436 PNA |
104 | ctnetlink_dump_tuples(struct sk_buff *skb, |
105 | const struct nf_conntrack_tuple *tuple) | |
106 | { | |
107 | int ret; | |
108 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 109 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 110 | |
528a3a6f | 111 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 112 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
113 | |
114 | if (unlikely(ret < 0)) | |
115 | return ret; | |
116 | ||
528a3a6f | 117 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 118 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
119 | |
120 | return ret; | |
c1d10adb PNA |
121 | } |
122 | ||
123 | static inline int | |
124 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
125 | { | |
77236b6e | 126 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
127 | return 0; |
128 | ||
df6fb868 | 129 | nla_put_failure: |
c1d10adb PNA |
130 | return -1; |
131 | } | |
132 | ||
133 | static inline int | |
134 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
135 | { | |
77236b6e | 136 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 137 | |
77236b6e | 138 | if (timeout < 0) |
c1d10adb | 139 | timeout = 0; |
601e68e1 | 140 | |
77236b6e | 141 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
142 | return 0; |
143 | ||
df6fb868 | 144 | nla_put_failure: |
c1d10adb PNA |
145 | return -1; |
146 | } | |
147 | ||
148 | static inline int | |
440f0d58 | 149 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 150 | { |
5e8fbe2a | 151 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 152 | struct nlattr *nest_proto; |
c1d10adb PNA |
153 | int ret; |
154 | ||
528a3a6f PNA |
155 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
156 | if (!l4proto->to_nlattr) | |
c1d10adb | 157 | return 0; |
601e68e1 | 158 | |
df6fb868 PM |
159 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
160 | if (!nest_proto) | |
161 | goto nla_put_failure; | |
c1d10adb | 162 | |
fdf70832 | 163 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 164 | |
df6fb868 | 165 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
166 | |
167 | return ret; | |
168 | ||
df6fb868 | 169 | nla_put_failure: |
c1d10adb PNA |
170 | return -1; |
171 | } | |
172 | ||
173 | static inline int | |
174 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
175 | { | |
df6fb868 | 176 | struct nlattr *nest_helper; |
dc808fe2 | 177 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 178 | struct nf_conntrack_helper *helper; |
c1d10adb | 179 | |
3c158f7f | 180 | if (!help) |
c1d10adb | 181 | return 0; |
601e68e1 | 182 | |
3c158f7f PM |
183 | helper = rcu_dereference(help->helper); |
184 | if (!helper) | |
185 | goto out; | |
186 | ||
df6fb868 PM |
187 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
188 | if (!nest_helper) | |
189 | goto nla_put_failure; | |
77236b6e | 190 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 191 | |
fdf70832 PM |
192 | if (helper->to_nlattr) |
193 | helper->to_nlattr(skb, ct); | |
c1d10adb | 194 | |
df6fb868 | 195 | nla_nest_end(skb, nest_helper); |
3c158f7f | 196 | out: |
c1d10adb PNA |
197 | return 0; |
198 | ||
df6fb868 | 199 | nla_put_failure: |
c1d10adb PNA |
200 | return -1; |
201 | } | |
202 | ||
bb5cf80e | 203 | static int |
c1d10adb PNA |
204 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
205 | enum ip_conntrack_dir dir) | |
206 | { | |
207 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 208 | struct nlattr *nest_count; |
58401572 KPO |
209 | const struct nf_conn_counter *acct; |
210 | ||
211 | acct = nf_conn_acct_find(ct); | |
212 | if (!acct) | |
213 | return 0; | |
c1d10adb | 214 | |
df6fb868 PM |
215 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
216 | if (!nest_count) | |
217 | goto nla_put_failure; | |
218 | ||
58401572 KPO |
219 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
220 | cpu_to_be64(acct[dir].packets)); | |
221 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
222 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 223 | |
df6fb868 | 224 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
225 | |
226 | return 0; | |
227 | ||
df6fb868 | 228 | nla_put_failure: |
c1d10adb PNA |
229 | return -1; |
230 | } | |
c1d10adb PNA |
231 | |
232 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
233 | static inline int | |
234 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
235 | { | |
77236b6e | 236 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
237 | return 0; |
238 | ||
df6fb868 | 239 | nla_put_failure: |
c1d10adb PNA |
240 | return -1; |
241 | } | |
242 | #else | |
243 | #define ctnetlink_dump_mark(a, b) (0) | |
244 | #endif | |
245 | ||
37fccd85 PNA |
246 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
247 | static inline int | |
248 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) | |
249 | { | |
77236b6e | 250 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
37fccd85 PNA |
251 | return 0; |
252 | ||
253 | nla_put_failure: | |
254 | return -1; | |
255 | } | |
256 | #else | |
257 | #define ctnetlink_dump_secmark(a, b) (0) | |
258 | #endif | |
259 | ||
0f417ce9 PNA |
260 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
261 | ||
262 | static inline int | |
263 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
264 | { | |
265 | struct nlattr *nest_parms; | |
266 | ||
267 | if (!(ct->status & IPS_EXPECTED)) | |
268 | return 0; | |
269 | ||
270 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
271 | if (!nest_parms) | |
272 | goto nla_put_failure; | |
273 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
274 | goto nla_put_failure; | |
275 | nla_nest_end(skb, nest_parms); | |
276 | ||
277 | return 0; | |
278 | ||
279 | nla_put_failure: | |
280 | return -1; | |
281 | } | |
282 | ||
13eae15a | 283 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 284 | static int |
13eae15a PNA |
285 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
286 | { | |
13eae15a PNA |
287 | struct nlattr *nest_parms; |
288 | ||
289 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
290 | if (!nest_parms) | |
291 | goto nla_put_failure; | |
292 | ||
77236b6e PM |
293 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
294 | htonl(natseq->correction_pos)); | |
295 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
296 | htonl(natseq->offset_before)); | |
297 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
298 | htonl(natseq->offset_after)); | |
13eae15a PNA |
299 | |
300 | nla_nest_end(skb, nest_parms); | |
301 | ||
302 | return 0; | |
303 | ||
304 | nla_put_failure: | |
305 | return -1; | |
306 | } | |
307 | ||
308 | static inline int | |
309 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
310 | { | |
311 | struct nf_nat_seq *natseq; | |
312 | struct nf_conn_nat *nat = nfct_nat(ct); | |
313 | ||
314 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
315 | return 0; | |
316 | ||
317 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
318 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
319 | return -1; | |
320 | ||
321 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
322 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
323 | return -1; | |
324 | ||
325 | return 0; | |
326 | } | |
327 | #else | |
328 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
329 | #endif | |
330 | ||
c1d10adb PNA |
331 | static inline int |
332 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
333 | { | |
77236b6e | 334 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
335 | return 0; |
336 | ||
df6fb868 | 337 | nla_put_failure: |
c1d10adb PNA |
338 | return -1; |
339 | } | |
340 | ||
341 | static inline int | |
342 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
343 | { | |
77236b6e | 344 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
345 | return 0; |
346 | ||
df6fb868 | 347 | nla_put_failure: |
c1d10adb PNA |
348 | return -1; |
349 | } | |
350 | ||
c1d10adb PNA |
351 | static int |
352 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
440f0d58 | 353 | int event, struct nf_conn *ct) |
c1d10adb PNA |
354 | { |
355 | struct nlmsghdr *nlh; | |
356 | struct nfgenmsg *nfmsg; | |
df6fb868 | 357 | struct nlattr *nest_parms; |
96bcf938 | 358 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
359 | |
360 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
96bcf938 PNA |
361 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
362 | if (nlh == NULL) | |
363 | goto nlmsg_failure; | |
c1d10adb | 364 | |
96bcf938 | 365 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 366 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
367 | nfmsg->version = NFNETLINK_V0; |
368 | nfmsg->res_id = 0; | |
369 | ||
df6fb868 PM |
370 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
371 | if (!nest_parms) | |
372 | goto nla_put_failure; | |
f2f3e38c | 373 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
374 | goto nla_put_failure; |
375 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 376 | |
df6fb868 PM |
377 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
378 | if (!nest_parms) | |
379 | goto nla_put_failure; | |
f2f3e38c | 380 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
381 | goto nla_put_failure; |
382 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 383 | |
ef00f89f PM |
384 | if (nf_ct_zone(ct)) |
385 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); | |
386 | ||
c1d10adb PNA |
387 | if (ctnetlink_dump_status(skb, ct) < 0 || |
388 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
389 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
390 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
391 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
392 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
393 | ctnetlink_dump_mark(skb, ct) < 0 || | |
37fccd85 | 394 | ctnetlink_dump_secmark(skb, ct) < 0 || |
c1d10adb | 395 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 396 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 397 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 398 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 399 | goto nla_put_failure; |
c1d10adb | 400 | |
96bcf938 | 401 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
402 | return skb->len; |
403 | ||
404 | nlmsg_failure: | |
df6fb868 | 405 | nla_put_failure: |
96bcf938 | 406 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
407 | return -1; |
408 | } | |
409 | ||
410 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
03b64f51 PNA |
411 | static inline size_t |
412 | ctnetlink_proto_size(const struct nf_conn *ct) | |
2732c4e4 HE |
413 | { |
414 | struct nf_conntrack_l3proto *l3proto; | |
415 | struct nf_conntrack_l4proto *l4proto; | |
03b64f51 PNA |
416 | size_t len = 0; |
417 | ||
418 | rcu_read_lock(); | |
419 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); | |
420 | len += l3proto->nla_size; | |
421 | ||
422 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
423 | len += l4proto->nla_size; | |
424 | rcu_read_unlock(); | |
425 | ||
426 | return len; | |
427 | } | |
428 | ||
429 | static inline size_t | |
430 | ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
431 | { | |
432 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
433 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
434 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
435 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
436 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
437 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
438 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
d271e8bd | 439 | #ifdef CONFIG_NF_CT_ACCT |
03b64f51 PNA |
440 | + 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
441 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ | |
442 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
d271e8bd | 443 | #endif |
03b64f51 PNA |
444 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
445 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
446 | + nla_total_size(0) /* CTA_HELP */ | |
447 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
d271e8bd | 448 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
03b64f51 | 449 | + nla_total_size(sizeof(u_int32_t)) /* CTA_SECMARK */ |
d271e8bd HE |
450 | #endif |
451 | #ifdef CONFIG_NF_NAT_NEEDED | |
03b64f51 PNA |
452 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
453 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
454 | #endif |
455 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 456 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
d271e8bd | 457 | #endif |
03b64f51 PNA |
458 | + ctnetlink_proto_size(ct) |
459 | ; | |
2732c4e4 HE |
460 | } |
461 | ||
e34d5c1a PNA |
462 | static int |
463 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb | 464 | { |
9592a5c0 | 465 | struct net *net; |
c1d10adb PNA |
466 | struct nlmsghdr *nlh; |
467 | struct nfgenmsg *nfmsg; | |
df6fb868 | 468 | struct nlattr *nest_parms; |
19abb7b0 | 469 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
470 | struct sk_buff *skb; |
471 | unsigned int type; | |
c1d10adb | 472 | unsigned int flags = 0, group; |
dd7669a9 | 473 | int err; |
c1d10adb PNA |
474 | |
475 | /* ignore our fake conntrack entry */ | |
476 | if (ct == &nf_conntrack_untracked) | |
e34d5c1a | 477 | return 0; |
c1d10adb | 478 | |
a0891aa6 | 479 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
480 | type = IPCTNL_MSG_CT_DELETE; |
481 | group = NFNLGRP_CONNTRACK_DESTROY; | |
a0891aa6 | 482 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
483 | type = IPCTNL_MSG_CT_NEW; |
484 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 485 | group = NFNLGRP_CONNTRACK_NEW; |
17e6e4ea | 486 | } else if (events) { |
c1d10adb PNA |
487 | type = IPCTNL_MSG_CT_NEW; |
488 | group = NFNLGRP_CONNTRACK_UPDATE; | |
489 | } else | |
e34d5c1a | 490 | return 0; |
a2427692 | 491 | |
9592a5c0 AD |
492 | net = nf_ct_net(ct); |
493 | if (!item->report && !nfnetlink_has_listeners(net, group)) | |
e34d5c1a | 494 | return 0; |
a2427692 | 495 | |
03b64f51 PNA |
496 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
497 | if (skb == NULL) | |
150ace0d | 498 | goto errout; |
c1d10adb | 499 | |
c1d10adb | 500 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
96bcf938 PNA |
501 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
502 | if (nlh == NULL) | |
503 | goto nlmsg_failure; | |
c1d10adb | 504 | |
96bcf938 | 505 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 506 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
507 | nfmsg->version = NFNETLINK_V0; |
508 | nfmsg->res_id = 0; | |
509 | ||
528a3a6f | 510 | rcu_read_lock(); |
df6fb868 PM |
511 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
512 | if (!nest_parms) | |
513 | goto nla_put_failure; | |
f2f3e38c | 514 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
515 | goto nla_put_failure; |
516 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 517 | |
df6fb868 PM |
518 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
519 | if (!nest_parms) | |
520 | goto nla_put_failure; | |
f2f3e38c | 521 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
522 | goto nla_put_failure; |
523 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 524 | |
ef00f89f PM |
525 | if (nf_ct_zone(ct)) |
526 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); | |
527 | ||
1eedf699 EL |
528 | if (ctnetlink_dump_id(skb, ct) < 0) |
529 | goto nla_put_failure; | |
530 | ||
e57dce60 FH |
531 | if (ctnetlink_dump_status(skb, ct) < 0) |
532 | goto nla_put_failure; | |
533 | ||
a0891aa6 | 534 | if (events & (1 << IPCT_DESTROY)) { |
7b621c1e PNA |
535 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
536 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 537 | goto nla_put_failure; |
7b621c1e | 538 | } else { |
7b621c1e | 539 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 540 | goto nla_put_failure; |
7b621c1e | 541 | |
a0891aa6 | 542 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 543 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 544 | goto nla_put_failure; |
7b621c1e | 545 | |
a0891aa6 | 546 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 547 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 548 | goto nla_put_failure; |
7b621c1e | 549 | |
37fccd85 | 550 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 551 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
37fccd85 PNA |
552 | && ctnetlink_dump_secmark(skb, ct) < 0) |
553 | goto nla_put_failure; | |
554 | #endif | |
7b621c1e | 555 | |
a0891aa6 | 556 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
557 | ctnetlink_dump_master(skb, ct) < 0) |
558 | goto nla_put_failure; | |
559 | ||
a0891aa6 | 560 | if (events & (1 << IPCT_NATSEQADJ) && |
13eae15a PNA |
561 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
562 | goto nla_put_failure; | |
7b621c1e | 563 | } |
b9a37e0c | 564 | |
a83099a6 | 565 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 566 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
567 | && ctnetlink_dump_mark(skb, ct) < 0) |
568 | goto nla_put_failure; | |
569 | #endif | |
528a3a6f | 570 | rcu_read_unlock(); |
a83099a6 | 571 | |
96bcf938 | 572 | nlmsg_end(skb, nlh); |
9592a5c0 | 573 | err = nfnetlink_send(skb, net, item->pid, group, item->report, |
cd8c20b6 | 574 | GFP_ATOMIC); |
dd7669a9 PNA |
575 | if (err == -ENOBUFS || err == -EAGAIN) |
576 | return -ENOBUFS; | |
577 | ||
e34d5c1a | 578 | return 0; |
c1d10adb | 579 | |
df6fb868 | 580 | nla_put_failure: |
528a3a6f | 581 | rcu_read_unlock(); |
96bcf938 | 582 | nlmsg_cancel(skb, nlh); |
528a3a6f | 583 | nlmsg_failure: |
c1d10adb | 584 | kfree_skb(skb); |
150ace0d | 585 | errout: |
37b7ef72 PNA |
586 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
587 | return -ENOBUFS; | |
588 | ||
e34d5c1a | 589 | return 0; |
c1d10adb PNA |
590 | } |
591 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
592 | ||
593 | static int ctnetlink_done(struct netlink_callback *cb) | |
594 | { | |
89f2e218 PM |
595 | if (cb->args[1]) |
596 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
597 | return 0; |
598 | } | |
599 | ||
600 | static int | |
601 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
602 | { | |
9592a5c0 | 603 | struct net *net = sock_net(skb->sk); |
89f2e218 | 604 | struct nf_conn *ct, *last; |
c1d10adb | 605 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 606 | struct hlist_nulls_node *n; |
96bcf938 | 607 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 608 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 609 | |
76507f69 | 610 | rcu_read_lock(); |
d205dc40 | 611 | last = (struct nf_conn *)cb->args[1]; |
9ab99d5a | 612 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
89f2e218 | 613 | restart: |
9592a5c0 | 614 | hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[cb->args[0]], |
ea781f19 | 615 | hnnode) { |
5b1158e9 | 616 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
617 | continue; |
618 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
619 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
620 | continue; | |
87711cb8 PNA |
621 | /* Dump entries of a given L3 protocol number. |
622 | * If it is not specified, ie. l3proto == 0, | |
623 | * then dump everything. */ | |
5e8fbe2a | 624 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 625 | goto releasect; |
d205dc40 PM |
626 | if (cb->args[1]) { |
627 | if (ct != last) | |
ea781f19 | 628 | goto releasect; |
d205dc40 | 629 | cb->args[1] = 0; |
89f2e218 | 630 | } |
c1d10adb | 631 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 632 | cb->nlh->nlmsg_seq, |
8b0a231d | 633 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
89f2e218 | 634 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 635 | goto out; |
89f2e218 | 636 | } |
58401572 | 637 | |
01f34848 | 638 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
639 | IPCTNL_MSG_CT_GET_CTRZERO) { |
640 | struct nf_conn_counter *acct; | |
641 | ||
642 | acct = nf_conn_acct_find(ct); | |
643 | if (acct) | |
644 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
645 | } | |
ea781f19 ED |
646 | releasect: |
647 | nf_ct_put(ct); | |
89f2e218 | 648 | } |
d205dc40 | 649 | if (cb->args[1]) { |
89f2e218 PM |
650 | cb->args[1] = 0; |
651 | goto restart; | |
c1d10adb PNA |
652 | } |
653 | } | |
89f2e218 | 654 | out: |
76507f69 | 655 | rcu_read_unlock(); |
d205dc40 PM |
656 | if (last) |
657 | nf_ct_put(last); | |
c1d10adb | 658 | |
c1d10adb PNA |
659 | return skb->len; |
660 | } | |
661 | ||
c1d10adb | 662 | static inline int |
df6fb868 | 663 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 664 | { |
df6fb868 | 665 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
666 | struct nf_conntrack_l3proto *l3proto; |
667 | int ret = 0; | |
668 | ||
df6fb868 | 669 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 670 | |
cd91566e FW |
671 | rcu_read_lock(); |
672 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 673 | |
f73e924c PM |
674 | if (likely(l3proto->nlattr_to_tuple)) { |
675 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
676 | l3proto->nla_policy); | |
677 | if (ret == 0) | |
678 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
679 | } | |
c1d10adb | 680 | |
cd91566e | 681 | rcu_read_unlock(); |
c1d10adb | 682 | |
c1d10adb PNA |
683 | return ret; |
684 | } | |
685 | ||
f73e924c PM |
686 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
687 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
688 | }; |
689 | ||
690 | static inline int | |
df6fb868 | 691 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
692 | struct nf_conntrack_tuple *tuple) |
693 | { | |
df6fb868 | 694 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 695 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
696 | int ret = 0; |
697 | ||
f73e924c PM |
698 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
699 | if (ret < 0) | |
700 | return ret; | |
c1d10adb | 701 | |
df6fb868 | 702 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 703 | return -EINVAL; |
77236b6e | 704 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 705 | |
cd91566e FW |
706 | rcu_read_lock(); |
707 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 708 | |
f73e924c PM |
709 | if (likely(l4proto->nlattr_to_tuple)) { |
710 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
711 | l4proto->nla_policy); | |
712 | if (ret == 0) | |
713 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
714 | } | |
c1d10adb | 715 | |
cd91566e | 716 | rcu_read_unlock(); |
601e68e1 | 717 | |
c1d10adb PNA |
718 | return ret; |
719 | } | |
720 | ||
d0b0268f PM |
721 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
722 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
723 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
724 | }; | |
725 | ||
bb5cf80e | 726 | static int |
39938324 PM |
727 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
728 | struct nf_conntrack_tuple *tuple, | |
c1d10adb PNA |
729 | enum ctattr_tuple type, u_int8_t l3num) |
730 | { | |
df6fb868 | 731 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
732 | int err; |
733 | ||
c1d10adb PNA |
734 | memset(tuple, 0, sizeof(*tuple)); |
735 | ||
d0b0268f | 736 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
c1d10adb | 737 | |
df6fb868 | 738 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
739 | return -EINVAL; |
740 | ||
741 | tuple->src.l3num = l3num; | |
742 | ||
df6fb868 | 743 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
744 | if (err < 0) |
745 | return err; | |
746 | ||
df6fb868 | 747 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
748 | return -EINVAL; |
749 | ||
df6fb868 | 750 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
751 | if (err < 0) |
752 | return err; | |
753 | ||
754 | /* orig and expect tuples get DIR_ORIGINAL */ | |
755 | if (type == CTA_TUPLE_REPLY) | |
756 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
757 | else | |
758 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
759 | ||
c1d10adb PNA |
760 | return 0; |
761 | } | |
762 | ||
ef00f89f PM |
763 | static int |
764 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) | |
765 | { | |
766 | if (attr) | |
767 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
768 | *zone = ntohs(nla_get_be16(attr)); | |
769 | #else | |
770 | return -EOPNOTSUPP; | |
771 | #endif | |
772 | else | |
773 | *zone = 0; | |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
d0b0268f PM |
778 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
779 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING }, | |
780 | }; | |
781 | ||
c1d10adb | 782 | static inline int |
39938324 | 783 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name) |
c1d10adb | 784 | { |
df6fb868 | 785 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 786 | |
d0b0268f | 787 | nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
c1d10adb | 788 | |
df6fb868 | 789 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
790 | return -EINVAL; |
791 | ||
df6fb868 | 792 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
793 | |
794 | return 0; | |
795 | } | |
796 | ||
f73e924c | 797 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
798 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
799 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 800 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
801 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
802 | [CTA_HELP] = { .type = NLA_NESTED }, | |
803 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
804 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
805 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 806 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
807 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
808 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
ef00f89f | 809 | [CTA_ZONE] = { .type = NLA_U16 }, |
c1d10adb PNA |
810 | }; |
811 | ||
812 | static int | |
601e68e1 | 813 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
814 | const struct nlmsghdr *nlh, |
815 | const struct nlattr * const cda[]) | |
c1d10adb | 816 | { |
9592a5c0 | 817 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
818 | struct nf_conntrack_tuple_hash *h; |
819 | struct nf_conntrack_tuple tuple; | |
820 | struct nf_conn *ct; | |
96bcf938 | 821 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 822 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
823 | u16 zone; |
824 | int err; | |
825 | ||
826 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
827 | if (err < 0) | |
828 | return err; | |
c1d10adb | 829 | |
df6fb868 | 830 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 831 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 832 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
833 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
834 | else { | |
835 | /* Flush the whole table */ | |
9592a5c0 | 836 | nf_conntrack_flush_report(net, |
274d383b PNA |
837 | NETLINK_CB(skb).pid, |
838 | nlmsg_report(nlh)); | |
c1d10adb PNA |
839 | return 0; |
840 | } | |
841 | ||
842 | if (err < 0) | |
843 | return err; | |
844 | ||
ef00f89f | 845 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 846 | if (!h) |
c1d10adb | 847 | return -ENOENT; |
c1d10adb PNA |
848 | |
849 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 850 | |
df6fb868 | 851 | if (cda[CTA_ID]) { |
77236b6e | 852 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 853 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
854 | nf_ct_put(ct); |
855 | return -ENOENT; | |
856 | } | |
601e68e1 | 857 | } |
c1d10adb | 858 | |
dd7669a9 PNA |
859 | if (nf_conntrack_event_report(IPCT_DESTROY, ct, |
860 | NETLINK_CB(skb).pid, | |
861 | nlmsg_report(nlh)) < 0) { | |
862 | nf_ct_delete_from_lists(ct); | |
863 | /* we failed to report the event, try later */ | |
864 | nf_ct_insert_dying_list(ct); | |
865 | nf_ct_put(ct); | |
866 | return 0; | |
867 | } | |
19abb7b0 PNA |
868 | |
869 | /* death_by_timeout would report the event again */ | |
870 | set_bit(IPS_DYING_BIT, &ct->status); | |
871 | ||
51091764 | 872 | nf_ct_kill(ct); |
c1d10adb | 873 | nf_ct_put(ct); |
c1d10adb PNA |
874 | |
875 | return 0; | |
876 | } | |
877 | ||
878 | static int | |
601e68e1 | 879 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
880 | const struct nlmsghdr *nlh, |
881 | const struct nlattr * const cda[]) | |
c1d10adb | 882 | { |
9592a5c0 | 883 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
884 | struct nf_conntrack_tuple_hash *h; |
885 | struct nf_conntrack_tuple tuple; | |
886 | struct nf_conn *ct; | |
887 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 888 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 889 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
890 | u16 zone; |
891 | int err; | |
c1d10adb | 892 | |
58401572 | 893 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
894 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
895 | ctnetlink_done); | |
c1d10adb | 896 | |
ef00f89f PM |
897 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
898 | if (err < 0) | |
899 | return err; | |
900 | ||
df6fb868 | 901 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 902 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 903 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
904 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
905 | else | |
906 | return -EINVAL; | |
907 | ||
908 | if (err < 0) | |
909 | return err; | |
910 | ||
ef00f89f | 911 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 912 | if (!h) |
c1d10adb | 913 | return -ENOENT; |
9ea8cfd6 | 914 | |
c1d10adb PNA |
915 | ct = nf_ct_tuplehash_to_ctrack(h); |
916 | ||
917 | err = -ENOMEM; | |
96bcf938 PNA |
918 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
919 | if (skb2 == NULL) { | |
c1d10adb PNA |
920 | nf_ct_put(ct); |
921 | return -ENOMEM; | |
922 | } | |
c1d10adb | 923 | |
528a3a6f | 924 | rcu_read_lock(); |
601e68e1 | 925 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
8b0a231d | 926 | IPCTNL_MSG_CT_NEW, ct); |
528a3a6f | 927 | rcu_read_unlock(); |
c1d10adb PNA |
928 | nf_ct_put(ct); |
929 | if (err <= 0) | |
930 | goto free; | |
931 | ||
932 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
933 | if (err < 0) | |
934 | goto out; | |
935 | ||
c1d10adb PNA |
936 | return 0; |
937 | ||
938 | free: | |
939 | kfree_skb(skb2); | |
940 | out: | |
941 | return err; | |
942 | } | |
943 | ||
67671841 | 944 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
945 | static int |
946 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
947 | enum nf_nat_manip_type manip, | |
39938324 | 948 | const struct nlattr *attr) |
e6a7d3c0 PNA |
949 | { |
950 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
951 | ||
952 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
953 | if (!parse_nat_setup) { | |
95a5afca | 954 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 955 | rcu_read_unlock(); |
748085fc | 956 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
957 | nfnl_unlock(); |
958 | if (request_module("nf-nat-ipv4") < 0) { | |
959 | nfnl_lock(); | |
748085fc | 960 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
961 | rcu_read_lock(); |
962 | return -EOPNOTSUPP; | |
963 | } | |
964 | nfnl_lock(); | |
748085fc | 965 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
966 | rcu_read_lock(); |
967 | if (nfnetlink_parse_nat_setup_hook) | |
968 | return -EAGAIN; | |
969 | #endif | |
970 | return -EOPNOTSUPP; | |
971 | } | |
972 | ||
973 | return parse_nat_setup(ct, manip, attr); | |
974 | } | |
67671841 | 975 | #endif |
e6a7d3c0 | 976 | |
bb5cf80e | 977 | static int |
39938324 | 978 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
979 | { |
980 | unsigned long d; | |
77236b6e | 981 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
982 | d = ct->status ^ status; |
983 | ||
984 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
985 | /* unchangeable */ | |
0adf9d67 | 986 | return -EBUSY; |
601e68e1 | 987 | |
c1d10adb PNA |
988 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
989 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 990 | return -EBUSY; |
601e68e1 | 991 | |
c1d10adb PNA |
992 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
993 | /* ASSURED bit can only be set */ | |
0adf9d67 | 994 | return -EBUSY; |
c1d10adb | 995 | |
c1d10adb PNA |
996 | /* Be careful here, modifying NAT bits can screw up things, |
997 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 998 | * nf_nat_range. */ |
c1d10adb PNA |
999 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
1000 | return 0; | |
1001 | } | |
1002 | ||
e6a7d3c0 | 1003 | static int |
39938324 | 1004 | ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1005 | { |
1006 | #ifdef CONFIG_NF_NAT_NEEDED | |
1007 | int ret; | |
1008 | ||
1009 | if (cda[CTA_NAT_DST]) { | |
1010 | ret = ctnetlink_parse_nat_setup(ct, | |
1011 | IP_NAT_MANIP_DST, | |
1012 | cda[CTA_NAT_DST]); | |
1013 | if (ret < 0) | |
1014 | return ret; | |
1015 | } | |
1016 | if (cda[CTA_NAT_SRC]) { | |
1017 | ret = ctnetlink_parse_nat_setup(ct, | |
1018 | IP_NAT_MANIP_SRC, | |
1019 | cda[CTA_NAT_SRC]); | |
1020 | if (ret < 0) | |
1021 | return ret; | |
1022 | } | |
1023 | return 0; | |
1024 | #else | |
1025 | return -EOPNOTSUPP; | |
1026 | #endif | |
1027 | } | |
c1d10adb PNA |
1028 | |
1029 | static inline int | |
39938324 | 1030 | ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1031 | { |
1032 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1033 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1034 | char *helpname = NULL; |
c1d10adb PNA |
1035 | int err; |
1036 | ||
c1d10adb PNA |
1037 | /* don't change helper of sibling connections */ |
1038 | if (ct->master) | |
0adf9d67 | 1039 | return -EBUSY; |
c1d10adb | 1040 | |
df6fb868 | 1041 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
1042 | if (err < 0) |
1043 | return err; | |
1044 | ||
df293bbb YK |
1045 | if (!strcmp(helpname, "")) { |
1046 | if (help && help->helper) { | |
c1d10adb PNA |
1047 | /* we had a helper before ... */ |
1048 | nf_ct_remove_expectations(ct); | |
3c158f7f | 1049 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 1050 | } |
df293bbb YK |
1051 | |
1052 | return 0; | |
c1d10adb | 1053 | } |
601e68e1 | 1054 | |
794e6871 PM |
1055 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1056 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1057 | if (helper == NULL) { |
1058 | #ifdef CONFIG_MODULES | |
1059 | spin_unlock_bh(&nf_conntrack_lock); | |
1060 | ||
1061 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1062 | spin_lock_bh(&nf_conntrack_lock); | |
1063 | return -EOPNOTSUPP; | |
1064 | } | |
1065 | ||
1066 | spin_lock_bh(&nf_conntrack_lock); | |
794e6871 PM |
1067 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1068 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1069 | if (helper) |
1070 | return -EAGAIN; | |
1071 | #endif | |
0adf9d67 | 1072 | return -EOPNOTSUPP; |
226c0c0e | 1073 | } |
df293bbb | 1074 | |
ceceae1b YK |
1075 | if (help) { |
1076 | if (help->helper == helper) | |
1077 | return 0; | |
1078 | if (help->helper) | |
1079 | return -EBUSY; | |
1080 | /* need to zero data of old helper */ | |
1081 | memset(&help->help, 0, sizeof(help->help)); | |
1082 | } else { | |
a88e22ad PNA |
1083 | /* we cannot set a helper for an existing conntrack */ |
1084 | return -EOPNOTSUPP; | |
ceceae1b | 1085 | } |
df293bbb | 1086 | |
3c158f7f | 1087 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
1088 | |
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | static inline int | |
39938324 | 1093 | ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1094 | { |
77236b6e | 1095 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1096 | |
c1d10adb PNA |
1097 | if (!del_timer(&ct->timeout)) |
1098 | return -ETIME; | |
1099 | ||
1100 | ct->timeout.expires = jiffies + timeout * HZ; | |
1101 | add_timer(&ct->timeout); | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
d0b0268f PM |
1106 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1107 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1108 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1109 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1110 | }; | |
1111 | ||
c1d10adb | 1112 | static inline int |
39938324 | 1113 | ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1114 | { |
39938324 PM |
1115 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
1116 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; | |
605dcad6 | 1117 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1118 | int err = 0; |
1119 | ||
d0b0268f | 1120 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
c1d10adb | 1121 | |
cd91566e FW |
1122 | rcu_read_lock(); |
1123 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1124 | if (l4proto->from_nlattr) |
1125 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1126 | rcu_read_unlock(); |
c1d10adb PNA |
1127 | |
1128 | return err; | |
1129 | } | |
1130 | ||
13eae15a | 1131 | #ifdef CONFIG_NF_NAT_NEEDED |
d0b0268f PM |
1132 | static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = { |
1133 | [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1134 | [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1135 | [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
1136 | }; | |
1137 | ||
13eae15a | 1138 | static inline int |
39938324 | 1139 | change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr) |
13eae15a PNA |
1140 | { |
1141 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1142 | ||
d0b0268f | 1143 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy); |
13eae15a PNA |
1144 | |
1145 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1146 | return -EINVAL; | |
1147 | ||
1148 | natseq->correction_pos = | |
77236b6e | 1149 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1150 | |
1151 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1152 | return -EINVAL; | |
1153 | ||
1154 | natseq->offset_before = | |
77236b6e | 1155 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1156 | |
1157 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1158 | return -EINVAL; | |
1159 | ||
1160 | natseq->offset_after = | |
77236b6e | 1161 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1162 | |
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | static int | |
39938324 PM |
1167 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, |
1168 | const struct nlattr * const cda[]) | |
13eae15a PNA |
1169 | { |
1170 | int ret = 0; | |
1171 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1172 | ||
1173 | if (!nat) | |
1174 | return 0; | |
1175 | ||
1176 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1177 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1178 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1179 | if (ret < 0) | |
1180 | return ret; | |
1181 | ||
1182 | ct->status |= IPS_SEQ_ADJUST; | |
1183 | } | |
1184 | ||
1185 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1186 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1187 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1188 | if (ret < 0) | |
1189 | return ret; | |
1190 | ||
1191 | ct->status |= IPS_SEQ_ADJUST; | |
1192 | } | |
1193 | ||
1194 | return 0; | |
1195 | } | |
1196 | #endif | |
1197 | ||
c1d10adb | 1198 | static int |
39938324 PM |
1199 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1200 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1201 | { |
1202 | int err; | |
1203 | ||
e098360f PNA |
1204 | /* only allow NAT changes and master assignation for new conntracks */ |
1205 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1206 | return -EOPNOTSUPP; | |
1207 | ||
df6fb868 | 1208 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1209 | err = ctnetlink_change_helper(ct, cda); |
1210 | if (err < 0) | |
1211 | return err; | |
1212 | } | |
1213 | ||
df6fb868 | 1214 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1215 | err = ctnetlink_change_timeout(ct, cda); |
1216 | if (err < 0) | |
1217 | return err; | |
1218 | } | |
1219 | ||
df6fb868 | 1220 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1221 | err = ctnetlink_change_status(ct, cda); |
1222 | if (err < 0) | |
1223 | return err; | |
1224 | } | |
1225 | ||
df6fb868 | 1226 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1227 | err = ctnetlink_change_protoinfo(ct, cda); |
1228 | if (err < 0) | |
1229 | return err; | |
1230 | } | |
1231 | ||
bcd1e830 | 1232 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1233 | if (cda[CTA_MARK]) |
77236b6e | 1234 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1235 | #endif |
1236 | ||
13eae15a PNA |
1237 | #ifdef CONFIG_NF_NAT_NEEDED |
1238 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1239 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1240 | if (err < 0) | |
1241 | return err; | |
1242 | } | |
1243 | #endif | |
1244 | ||
c1d10adb PNA |
1245 | return 0; |
1246 | } | |
1247 | ||
f0a3c086 | 1248 | static struct nf_conn * |
ef00f89f | 1249 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
9592a5c0 | 1250 | const struct nlattr * const cda[], |
c1d10adb | 1251 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1252 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1253 | u8 u3) |
c1d10adb PNA |
1254 | { |
1255 | struct nf_conn *ct; | |
1256 | int err = -EINVAL; | |
ceceae1b | 1257 | struct nf_conntrack_helper *helper; |
c1d10adb | 1258 | |
ef00f89f | 1259 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1260 | if (IS_ERR(ct)) |
f0a3c086 | 1261 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1262 | |
df6fb868 | 1263 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1264 | goto err1; |
77236b6e | 1265 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1266 | |
1267 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
c1d10adb | 1268 | |
1575e7ea | 1269 | rcu_read_lock(); |
226c0c0e | 1270 | if (cda[CTA_HELP]) { |
29fe1b48 | 1271 | char *helpname = NULL; |
226c0c0e PNA |
1272 | |
1273 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1274 | if (err < 0) |
1275 | goto err2; | |
226c0c0e | 1276 | |
794e6871 PM |
1277 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1278 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1279 | if (helper == NULL) { |
1280 | rcu_read_unlock(); | |
1281 | #ifdef CONFIG_MODULES | |
1282 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1283 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1284 | goto err1; |
226c0c0e PNA |
1285 | } |
1286 | ||
1287 | rcu_read_lock(); | |
794e6871 PM |
1288 | helper = __nf_conntrack_helper_find(helpname, |
1289 | nf_ct_l3num(ct), | |
1290 | nf_ct_protonum(ct)); | |
226c0c0e | 1291 | if (helper) { |
226c0c0e | 1292 | err = -EAGAIN; |
0f5b3e85 | 1293 | goto err2; |
226c0c0e PNA |
1294 | } |
1295 | rcu_read_unlock(); | |
1296 | #endif | |
1297 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1298 | goto err1; |
226c0c0e PNA |
1299 | } else { |
1300 | struct nf_conn_help *help; | |
1301 | ||
1302 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1303 | if (help == NULL) { | |
226c0c0e | 1304 | err = -ENOMEM; |
0f5b3e85 | 1305 | goto err2; |
226c0c0e PNA |
1306 | } |
1307 | ||
1308 | /* not in hash table yet so not strictly necessary */ | |
1309 | rcu_assign_pointer(help->helper, helper); | |
1310 | } | |
1311 | } else { | |
1312 | /* try an implicit helper assignation */ | |
b2a15a60 | 1313 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1314 | if (err < 0) |
1315 | goto err2; | |
1575e7ea PNA |
1316 | } |
1317 | ||
a88e22ad PNA |
1318 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
1319 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1320 | if (err < 0) |
1321 | goto err2; | |
e6a7d3c0 PNA |
1322 | } |
1323 | ||
a88e22ad PNA |
1324 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
1325 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); | |
1326 | /* we must add conntrack extensions before confirmation. */ | |
1327 | ct->status |= IPS_CONFIRMED; | |
1328 | ||
1329 | if (cda[CTA_STATUS]) { | |
1330 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1331 | if (err < 0) |
1332 | goto err2; | |
bbb3357d | 1333 | } |
c1d10adb | 1334 | |
c969aa7d PNA |
1335 | #ifdef CONFIG_NF_NAT_NEEDED |
1336 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1337 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1338 | if (err < 0) |
1339 | goto err2; | |
c969aa7d PNA |
1340 | } |
1341 | #endif | |
1342 | ||
df6fb868 | 1343 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1344 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1345 | if (err < 0) |
1346 | goto err2; | |
c1d10adb PNA |
1347 | } |
1348 | ||
bcd1e830 | 1349 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1350 | if (cda[CTA_MARK]) |
77236b6e | 1351 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1352 | #endif |
1353 | ||
5faa1f4c | 1354 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1355 | if (cda[CTA_TUPLE_MASTER]) { |
1356 | struct nf_conntrack_tuple master; | |
1357 | struct nf_conntrack_tuple_hash *master_h; | |
1358 | struct nf_conn *master_ct; | |
1359 | ||
1360 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1361 | if (err < 0) | |
0f5b3e85 | 1362 | goto err2; |
7ec47496 | 1363 | |
ef00f89f | 1364 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
1365 | if (master_h == NULL) { |
1366 | err = -ENOENT; | |
0f5b3e85 | 1367 | goto err2; |
7ec47496 PNA |
1368 | } |
1369 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1370 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1371 | ct->master = master_ct; |
f2a89004 | 1372 | } |
5faa1f4c | 1373 | |
c1d10adb PNA |
1374 | add_timer(&ct->timeout); |
1375 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1376 | rcu_read_unlock(); |
dafc741c | 1377 | |
f0a3c086 | 1378 | return ct; |
c1d10adb | 1379 | |
0f5b3e85 PM |
1380 | err2: |
1381 | rcu_read_unlock(); | |
1382 | err1: | |
c1d10adb | 1383 | nf_conntrack_free(ct); |
f0a3c086 | 1384 | return ERR_PTR(err); |
c1d10adb PNA |
1385 | } |
1386 | ||
601e68e1 YH |
1387 | static int |
1388 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1389 | const struct nlmsghdr *nlh, |
1390 | const struct nlattr * const cda[]) | |
c1d10adb | 1391 | { |
9592a5c0 | 1392 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1393 | struct nf_conntrack_tuple otuple, rtuple; |
1394 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1395 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1396 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1397 | u16 zone; |
1398 | int err; | |
1399 | ||
1400 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1401 | if (err < 0) | |
1402 | return err; | |
c1d10adb | 1403 | |
df6fb868 | 1404 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1405 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1406 | if (err < 0) | |
1407 | return err; | |
1408 | } | |
1409 | ||
df6fb868 | 1410 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1411 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1412 | if (err < 0) | |
1413 | return err; | |
1414 | } | |
1415 | ||
f8ba1aff | 1416 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1417 | if (cda[CTA_TUPLE_ORIG]) |
ef00f89f | 1418 | h = __nf_conntrack_find(net, zone, &otuple); |
df6fb868 | 1419 | else if (cda[CTA_TUPLE_REPLY]) |
ef00f89f | 1420 | h = __nf_conntrack_find(net, zone, &rtuple); |
c1d10adb PNA |
1421 | |
1422 | if (h == NULL) { | |
c1d10adb | 1423 | err = -ENOENT; |
f0a3c086 PNA |
1424 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1425 | struct nf_conn *ct; | |
fecc1133 | 1426 | enum ip_conntrack_events events; |
5faa1f4c | 1427 | |
ef00f89f | 1428 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
f0a3c086 PNA |
1429 | &rtuple, u3); |
1430 | if (IS_ERR(ct)) { | |
1431 | err = PTR_ERR(ct); | |
5faa1f4c PNA |
1432 | goto out_unlock; |
1433 | } | |
f0a3c086 PNA |
1434 | err = 0; |
1435 | nf_conntrack_get(&ct->ct_general); | |
1436 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1437 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1438 | events = IPCT_RELATED; | |
1439 | else | |
1440 | events = IPCT_NEW; | |
1441 | ||
858b3133 PM |
1442 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1443 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1444 | (1 << IPCT_HELPER) | |
1445 | (1 << IPCT_PROTOINFO) | | |
1446 | (1 << IPCT_NATSEQADJ) | | |
1447 | (1 << IPCT_MARK) | events, | |
1448 | ct, NETLINK_CB(skb).pid, | |
1449 | nlmsg_report(nlh)); | |
f0a3c086 PNA |
1450 | nf_ct_put(ct); |
1451 | } else | |
1452 | spin_unlock_bh(&nf_conntrack_lock); | |
5faa1f4c | 1453 | |
c1d10adb PNA |
1454 | return err; |
1455 | } | |
1456 | /* implicit 'else' */ | |
1457 | ||
c1d10adb PNA |
1458 | /* We manipulate the conntrack inside the global conntrack table lock, |
1459 | * so there's no need to increase the refcount */ | |
c1d10adb | 1460 | err = -EEXIST; |
ff4ca827 | 1461 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1462 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1463 | ||
19abb7b0 PNA |
1464 | err = ctnetlink_change_conntrack(ct, cda); |
1465 | if (err == 0) { | |
1466 | nf_conntrack_get(&ct->ct_general); | |
1467 | spin_unlock_bh(&nf_conntrack_lock); | |
858b3133 PM |
1468 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1469 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1470 | (1 << IPCT_HELPER) | |
1471 | (1 << IPCT_PROTOINFO) | | |
1472 | (1 << IPCT_NATSEQADJ) | | |
1473 | (1 << IPCT_MARK), | |
1474 | ct, NETLINK_CB(skb).pid, | |
1475 | nlmsg_report(nlh)); | |
19abb7b0 PNA |
1476 | nf_ct_put(ct); |
1477 | } else | |
1478 | spin_unlock_bh(&nf_conntrack_lock); | |
1479 | ||
1480 | return err; | |
ff4ca827 | 1481 | } |
c1d10adb PNA |
1482 | |
1483 | out_unlock: | |
f8ba1aff | 1484 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1485 | return err; |
1486 | } | |
1487 | ||
601e68e1 YH |
1488 | /*********************************************************************** |
1489 | * EXPECT | |
1490 | ***********************************************************************/ | |
c1d10adb PNA |
1491 | |
1492 | static inline int | |
1493 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1494 | const struct nf_conntrack_tuple *tuple, | |
1495 | enum ctattr_expect type) | |
1496 | { | |
df6fb868 | 1497 | struct nlattr *nest_parms; |
601e68e1 | 1498 | |
df6fb868 PM |
1499 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1500 | if (!nest_parms) | |
1501 | goto nla_put_failure; | |
c1d10adb | 1502 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1503 | goto nla_put_failure; |
1504 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1505 | |
1506 | return 0; | |
1507 | ||
df6fb868 | 1508 | nla_put_failure: |
c1d10adb | 1509 | return -1; |
601e68e1 | 1510 | } |
c1d10adb | 1511 | |
1cde6436 PNA |
1512 | static inline int |
1513 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1514 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1515 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1516 | { |
1517 | int ret; | |
1518 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1519 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1520 | struct nf_conntrack_tuple m; |
df6fb868 | 1521 | struct nlattr *nest_parms; |
d4156e8c PM |
1522 | |
1523 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 1524 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
1525 | m.src.u.all = mask->src.u.all; |
1526 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 1527 | |
df6fb868 PM |
1528 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1529 | if (!nest_parms) | |
1530 | goto nla_put_failure; | |
1cde6436 | 1531 | |
528a3a6f | 1532 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1533 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1534 | |
1535 | if (unlikely(ret < 0)) | |
df6fb868 | 1536 | goto nla_put_failure; |
1cde6436 | 1537 | |
528a3a6f | 1538 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1539 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1540 | if (unlikely(ret < 0)) |
df6fb868 | 1541 | goto nla_put_failure; |
1cde6436 | 1542 | |
df6fb868 | 1543 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1544 | |
1545 | return 0; | |
1546 | ||
df6fb868 | 1547 | nla_put_failure: |
1cde6436 PNA |
1548 | return -1; |
1549 | } | |
1550 | ||
bb5cf80e | 1551 | static int |
c1d10adb | 1552 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1553 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1554 | { |
1555 | struct nf_conn *master = exp->master; | |
d1e7a03f | 1556 | struct nf_conntrack_helper *helper; |
d978e5da PM |
1557 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
1558 | ||
1559 | if (timeout < 0) | |
1560 | timeout = 0; | |
c1d10adb PNA |
1561 | |
1562 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1563 | goto nla_put_failure; |
1cde6436 | 1564 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1565 | goto nla_put_failure; |
c1d10adb PNA |
1566 | if (ctnetlink_exp_dump_tuple(skb, |
1567 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1568 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1569 | goto nla_put_failure; |
601e68e1 | 1570 | |
d978e5da | 1571 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1572 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
d1e7a03f PM |
1573 | helper = rcu_dereference(nfct_help(master)->helper); |
1574 | if (helper) | |
1575 | NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name); | |
c1d10adb PNA |
1576 | |
1577 | return 0; | |
601e68e1 | 1578 | |
df6fb868 | 1579 | nla_put_failure: |
c1d10adb PNA |
1580 | return -1; |
1581 | } | |
1582 | ||
1583 | static int | |
1584 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 1585 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1586 | { |
1587 | struct nlmsghdr *nlh; | |
1588 | struct nfgenmsg *nfmsg; | |
96bcf938 | 1589 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
1590 | |
1591 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
96bcf938 PNA |
1592 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
1593 | if (nlh == NULL) | |
1594 | goto nlmsg_failure; | |
c1d10adb | 1595 | |
96bcf938 | 1596 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1597 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1598 | nfmsg->version = NFNETLINK_V0; | |
1599 | nfmsg->res_id = 0; | |
1600 | ||
1601 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1602 | goto nla_put_failure; |
c1d10adb | 1603 | |
96bcf938 | 1604 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
1605 | return skb->len; |
1606 | ||
1607 | nlmsg_failure: | |
df6fb868 | 1608 | nla_put_failure: |
96bcf938 | 1609 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
1610 | return -1; |
1611 | } | |
1612 | ||
1613 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
1614 | static int |
1615 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 1616 | { |
9592a5c0 AD |
1617 | struct nf_conntrack_expect *exp = item->exp; |
1618 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
1619 | struct nlmsghdr *nlh; |
1620 | struct nfgenmsg *nfmsg; | |
c1d10adb PNA |
1621 | struct sk_buff *skb; |
1622 | unsigned int type; | |
c1d10adb PNA |
1623 | int flags = 0; |
1624 | ||
a0891aa6 | 1625 | if (events & (1 << IPEXP_NEW)) { |
c1d10adb PNA |
1626 | type = IPCTNL_MSG_EXP_NEW; |
1627 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
1628 | } else | |
e34d5c1a | 1629 | return 0; |
c1d10adb | 1630 | |
1f9da256 | 1631 | if (!item->report && |
9592a5c0 | 1632 | !nfnetlink_has_listeners(net, NFNLGRP_CONNTRACK_EXP_NEW)) |
e34d5c1a | 1633 | return 0; |
b3a27bfb | 1634 | |
96bcf938 PNA |
1635 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1636 | if (skb == NULL) | |
150ace0d | 1637 | goto errout; |
c1d10adb | 1638 | |
b633ad5f | 1639 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
96bcf938 PNA |
1640 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
1641 | if (nlh == NULL) | |
1642 | goto nlmsg_failure; | |
c1d10adb | 1643 | |
96bcf938 | 1644 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1645 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1646 | nfmsg->version = NFNETLINK_V0; | |
1647 | nfmsg->res_id = 0; | |
1648 | ||
528a3a6f | 1649 | rcu_read_lock(); |
c1d10adb | 1650 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1651 | goto nla_put_failure; |
528a3a6f | 1652 | rcu_read_unlock(); |
c1d10adb | 1653 | |
96bcf938 | 1654 | nlmsg_end(skb, nlh); |
9592a5c0 | 1655 | nfnetlink_send(skb, net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, |
e34d5c1a PNA |
1656 | item->report, GFP_ATOMIC); |
1657 | return 0; | |
c1d10adb | 1658 | |
df6fb868 | 1659 | nla_put_failure: |
528a3a6f | 1660 | rcu_read_unlock(); |
96bcf938 | 1661 | nlmsg_cancel(skb, nlh); |
528a3a6f | 1662 | nlmsg_failure: |
c1d10adb | 1663 | kfree_skb(skb); |
150ace0d | 1664 | errout: |
9592a5c0 | 1665 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 1666 | return 0; |
c1d10adb PNA |
1667 | } |
1668 | #endif | |
cf6994c2 PM |
1669 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1670 | { | |
31f15875 PM |
1671 | if (cb->args[1]) |
1672 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1673 | return 0; |
1674 | } | |
c1d10adb PNA |
1675 | |
1676 | static int | |
1677 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1678 | { | |
9592a5c0 | 1679 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 1680 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 1681 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
31f15875 | 1682 | struct hlist_node *n; |
87711cb8 | 1683 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1684 | |
7d0742da | 1685 | rcu_read_lock(); |
31f15875 PM |
1686 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1687 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1688 | restart: |
9b03f38d | 1689 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1690 | hnode) { |
1691 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1692 | continue; |
31f15875 PM |
1693 | if (cb->args[1]) { |
1694 | if (exp != last) | |
1695 | continue; | |
1696 | cb->args[1] = 0; | |
1697 | } | |
8b0a231d PNA |
1698 | if (ctnetlink_exp_fill_info(skb, |
1699 | NETLINK_CB(cb->skb).pid, | |
31f15875 PM |
1700 | cb->nlh->nlmsg_seq, |
1701 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 1702 | exp) < 0) { |
7d0742da PM |
1703 | if (!atomic_inc_not_zero(&exp->use)) |
1704 | continue; | |
31f15875 PM |
1705 | cb->args[1] = (unsigned long)exp; |
1706 | goto out; | |
1707 | } | |
cf6994c2 | 1708 | } |
31f15875 PM |
1709 | if (cb->args[1]) { |
1710 | cb->args[1] = 0; | |
1711 | goto restart; | |
cf6994c2 PM |
1712 | } |
1713 | } | |
601e68e1 | 1714 | out: |
7d0742da | 1715 | rcu_read_unlock(); |
cf6994c2 PM |
1716 | if (last) |
1717 | nf_ct_expect_put(last); | |
c1d10adb | 1718 | |
c1d10adb PNA |
1719 | return skb->len; |
1720 | } | |
1721 | ||
f73e924c | 1722 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
d0b0268f PM |
1723 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
1724 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
1725 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
f73e924c PM |
1726 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
1727 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
d0b0268f | 1728 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING }, |
c1d10adb PNA |
1729 | }; |
1730 | ||
1731 | static int | |
601e68e1 | 1732 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1733 | const struct nlmsghdr *nlh, |
1734 | const struct nlattr * const cda[]) | |
c1d10adb | 1735 | { |
9592a5c0 | 1736 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1737 | struct nf_conntrack_tuple tuple; |
1738 | struct nf_conntrack_expect *exp; | |
1739 | struct sk_buff *skb2; | |
96bcf938 | 1740 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1741 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1742 | u16 zone; |
1743 | int err; | |
c1d10adb | 1744 | |
c1d10adb | 1745 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1746 | return netlink_dump_start(ctnl, skb, nlh, |
1747 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1748 | ctnetlink_exp_done); |
c1d10adb PNA |
1749 | } |
1750 | ||
ef00f89f PM |
1751 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1752 | if (err < 0) | |
1753 | return err; | |
1754 | ||
df6fb868 | 1755 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1756 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1757 | else | |
1758 | return -EINVAL; | |
1759 | ||
1760 | if (err < 0) | |
1761 | return err; | |
1762 | ||
ef00f89f | 1763 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
1764 | if (!exp) |
1765 | return -ENOENT; | |
1766 | ||
df6fb868 | 1767 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1768 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1769 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1770 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1771 | return -ENOENT; |
1772 | } | |
601e68e1 | 1773 | } |
c1d10adb PNA |
1774 | |
1775 | err = -ENOMEM; | |
96bcf938 PNA |
1776 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1777 | if (skb2 == NULL) | |
c1d10adb | 1778 | goto out; |
4e9b8269 | 1779 | |
528a3a6f | 1780 | rcu_read_lock(); |
601e68e1 | 1781 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
8b0a231d | 1782 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 1783 | rcu_read_unlock(); |
c1d10adb PNA |
1784 | if (err <= 0) |
1785 | goto free; | |
1786 | ||
6823645d | 1787 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1788 | |
1789 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1790 | ||
1791 | free: | |
1792 | kfree_skb(skb2); | |
1793 | out: | |
6823645d | 1794 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1795 | return err; |
1796 | } | |
1797 | ||
1798 | static int | |
601e68e1 | 1799 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1800 | const struct nlmsghdr *nlh, |
1801 | const struct nlattr * const cda[]) | |
c1d10adb | 1802 | { |
9592a5c0 | 1803 | struct net *net = sock_net(ctnl); |
31f15875 | 1804 | struct nf_conntrack_expect *exp; |
c1d10adb | 1805 | struct nf_conntrack_tuple tuple; |
96bcf938 | 1806 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
31f15875 | 1807 | struct hlist_node *n, *next; |
c1d10adb | 1808 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1809 | unsigned int i; |
ef00f89f | 1810 | u16 zone; |
c1d10adb PNA |
1811 | int err; |
1812 | ||
df6fb868 | 1813 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 1814 | /* delete a single expect by tuple */ |
ef00f89f PM |
1815 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1816 | if (err < 0) | |
1817 | return err; | |
1818 | ||
c1d10adb PNA |
1819 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
1820 | if (err < 0) | |
1821 | return err; | |
1822 | ||
1823 | /* bump usage count to 2 */ | |
ef00f89f | 1824 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
1825 | if (!exp) |
1826 | return -ENOENT; | |
1827 | ||
df6fb868 | 1828 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1829 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1830 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1831 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1832 | return -ENOENT; |
1833 | } | |
1834 | } | |
1835 | ||
1836 | /* after list removal, usage count == 1 */ | |
6823645d | 1837 | nf_ct_unexpect_related(exp); |
601e68e1 | 1838 | /* have to put what we 'get' above. |
c1d10adb | 1839 | * after this line usage count == 0 */ |
6823645d | 1840 | nf_ct_expect_put(exp); |
df6fb868 PM |
1841 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1842 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1843 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1844 | |
1845 | /* delete all expectations for this helper */ | |
f8ba1aff | 1846 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1847 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1848 | hlist_for_each_entry_safe(exp, n, next, | |
9592a5c0 | 1849 | &net->ct.expect_hash[i], |
31f15875 PM |
1850 | hnode) { |
1851 | m_help = nfct_help(exp->master); | |
794e6871 PM |
1852 | if (!strcmp(m_help->helper->name, name) && |
1853 | del_timer(&exp->timeout)) { | |
31f15875 PM |
1854 | nf_ct_unlink_expect(exp); |
1855 | nf_ct_expect_put(exp); | |
1856 | } | |
c1d10adb PNA |
1857 | } |
1858 | } | |
f8ba1aff | 1859 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1860 | } else { |
1861 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1862 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1863 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1864 | hlist_for_each_entry_safe(exp, n, next, | |
9592a5c0 | 1865 | &net->ct.expect_hash[i], |
31f15875 PM |
1866 | hnode) { |
1867 | if (del_timer(&exp->timeout)) { | |
1868 | nf_ct_unlink_expect(exp); | |
1869 | nf_ct_expect_put(exp); | |
1870 | } | |
c1d10adb PNA |
1871 | } |
1872 | } | |
f8ba1aff | 1873 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1874 | } |
1875 | ||
1876 | return 0; | |
1877 | } | |
1878 | static int | |
39938324 PM |
1879 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
1880 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1881 | { |
1882 | return -EOPNOTSUPP; | |
1883 | } | |
1884 | ||
1885 | static int | |
ef00f89f PM |
1886 | ctnetlink_create_expect(struct net *net, u16 zone, |
1887 | const struct nlattr * const cda[], | |
9592a5c0 | 1888 | u_int8_t u3, |
39938324 | 1889 | u32 pid, int report) |
c1d10adb PNA |
1890 | { |
1891 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1892 | struct nf_conntrack_tuple_hash *h = NULL; | |
1893 | struct nf_conntrack_expect *exp; | |
1894 | struct nf_conn *ct; | |
dc808fe2 | 1895 | struct nf_conn_help *help; |
c1d10adb PNA |
1896 | int err = 0; |
1897 | ||
c1d10adb PNA |
1898 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1899 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1900 | if (err < 0) | |
1901 | return err; | |
1902 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1903 | if (err < 0) | |
1904 | return err; | |
1905 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1906 | if (err < 0) | |
1907 | return err; | |
1908 | ||
1909 | /* Look for master conntrack of this expectation */ | |
ef00f89f | 1910 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
c1d10adb PNA |
1911 | if (!h) |
1912 | return -ENOENT; | |
1913 | ct = nf_ct_tuplehash_to_ctrack(h); | |
dc808fe2 | 1914 | help = nfct_help(ct); |
c1d10adb | 1915 | |
dc808fe2 | 1916 | if (!help || !help->helper) { |
c1d10adb | 1917 | /* such conntrack hasn't got any helper, abort */ |
bfe29677 | 1918 | err = -EOPNOTSUPP; |
c1d10adb PNA |
1919 | goto out; |
1920 | } | |
1921 | ||
6823645d | 1922 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1923 | if (!exp) { |
1924 | err = -ENOMEM; | |
1925 | goto out; | |
1926 | } | |
601e68e1 | 1927 | |
626ba8fb | 1928 | exp->class = 0; |
c1d10adb PNA |
1929 | exp->expectfn = NULL; |
1930 | exp->flags = 0; | |
1931 | exp->master = ct; | |
9457d851 | 1932 | exp->helper = NULL; |
c1d10adb | 1933 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
1934 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
1935 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 1936 | |
19abb7b0 | 1937 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 1938 | nf_ct_expect_put(exp); |
c1d10adb | 1939 | |
601e68e1 | 1940 | out: |
c1d10adb PNA |
1941 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
1942 | return err; | |
1943 | } | |
1944 | ||
1945 | static int | |
1946 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1947 | const struct nlmsghdr *nlh, |
1948 | const struct nlattr * const cda[]) | |
c1d10adb | 1949 | { |
9592a5c0 | 1950 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1951 | struct nf_conntrack_tuple tuple; |
1952 | struct nf_conntrack_expect *exp; | |
96bcf938 | 1953 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1954 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1955 | u16 zone; |
1956 | int err; | |
c1d10adb | 1957 | |
df6fb868 PM |
1958 | if (!cda[CTA_EXPECT_TUPLE] |
1959 | || !cda[CTA_EXPECT_MASK] | |
1960 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
1961 | return -EINVAL; |
1962 | ||
ef00f89f PM |
1963 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1964 | if (err < 0) | |
1965 | return err; | |
1966 | ||
c1d10adb PNA |
1967 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
1968 | if (err < 0) | |
1969 | return err; | |
1970 | ||
f8ba1aff | 1971 | spin_lock_bh(&nf_conntrack_lock); |
ef00f89f | 1972 | exp = __nf_ct_expect_find(net, zone, &tuple); |
c1d10adb PNA |
1973 | |
1974 | if (!exp) { | |
f8ba1aff | 1975 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1976 | err = -ENOENT; |
19abb7b0 | 1977 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
ef00f89f | 1978 | err = ctnetlink_create_expect(net, zone, cda, |
19abb7b0 PNA |
1979 | u3, |
1980 | NETLINK_CB(skb).pid, | |
1981 | nlmsg_report(nlh)); | |
1982 | } | |
c1d10adb PNA |
1983 | return err; |
1984 | } | |
1985 | ||
1986 | err = -EEXIST; | |
1987 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
1988 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 1989 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 1990 | |
c1d10adb PNA |
1991 | return err; |
1992 | } | |
1993 | ||
1994 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
1995 | static struct nf_ct_event_notifier ctnl_notifier = { |
1996 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
1997 | }; |
1998 | ||
e34d5c1a PNA |
1999 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
2000 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
2001 | }; |
2002 | #endif | |
2003 | ||
7c8d4cb4 | 2004 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 2005 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
2006 | .attr_count = CTA_MAX, |
2007 | .policy = ct_nla_policy }, | |
c1d10adb | 2008 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
2009 | .attr_count = CTA_MAX, |
2010 | .policy = ct_nla_policy }, | |
c1d10adb | 2011 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
2012 | .attr_count = CTA_MAX, |
2013 | .policy = ct_nla_policy }, | |
c1d10adb | 2014 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
2015 | .attr_count = CTA_MAX, |
2016 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
2017 | }; |
2018 | ||
7c8d4cb4 | 2019 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 2020 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
2021 | .attr_count = CTA_EXPECT_MAX, |
2022 | .policy = exp_nla_policy }, | |
c1d10adb | 2023 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
2024 | .attr_count = CTA_EXPECT_MAX, |
2025 | .policy = exp_nla_policy }, | |
c1d10adb | 2026 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
2027 | .attr_count = CTA_EXPECT_MAX, |
2028 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
2029 | }; |
2030 | ||
7c8d4cb4 | 2031 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
2032 | .name = "conntrack", |
2033 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
2034 | .cb_count = IPCTNL_MSG_MAX, | |
2035 | .cb = ctnl_cb, | |
2036 | }; | |
2037 | ||
7c8d4cb4 | 2038 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
2039 | .name = "conntrack_expect", |
2040 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
2041 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
2042 | .cb = ctnl_exp_cb, | |
2043 | }; | |
2044 | ||
d2483dde | 2045 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 2046 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 2047 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
2048 | |
2049 | static int __init ctnetlink_init(void) | |
2050 | { | |
2051 | int ret; | |
2052 | ||
2053 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); | |
2054 | ret = nfnetlink_subsys_register(&ctnl_subsys); | |
2055 | if (ret < 0) { | |
2056 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); | |
2057 | goto err_out; | |
2058 | } | |
2059 | ||
2060 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
2061 | if (ret < 0) { | |
2062 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); | |
2063 | goto err_unreg_subsys; | |
2064 | } | |
2065 | ||
2066 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2067 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
2068 | if (ret < 0) { | |
2069 | printk("ctnetlink_init: cannot register notifier.\n"); | |
2070 | goto err_unreg_exp_subsys; | |
2071 | } | |
2072 | ||
6823645d | 2073 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
2074 | if (ret < 0) { |
2075 | printk("ctnetlink_init: cannot expect register notifier.\n"); | |
2076 | goto err_unreg_notifier; | |
2077 | } | |
2078 | #endif | |
2079 | ||
2080 | return 0; | |
2081 | ||
2082 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2083 | err_unreg_notifier: | |
2084 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
2085 | err_unreg_exp_subsys: | |
2086 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
2087 | #endif | |
2088 | err_unreg_subsys: | |
2089 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
2090 | err_out: | |
2091 | return ret; | |
2092 | } | |
2093 | ||
2094 | static void __exit ctnetlink_exit(void) | |
2095 | { | |
2096 | printk("ctnetlink: unregistering from nfnetlink.\n"); | |
2097 | ||
2098 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
6823645d | 2099 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
2100 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
2101 | #endif | |
2102 | ||
2103 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
2104 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
2105 | return; | |
2106 | } | |
2107 | ||
2108 | module_init(ctnetlink_init); | |
2109 | module_exit(ctnetlink_exit); |