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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> | |
1cc63249 | 25 | #include <linux/security.h> |
c1d10adb PNA |
26 | #include <linux/skbuff.h> |
27 | #include <linux/errno.h> | |
28 | #include <linux/netlink.h> | |
29 | #include <linux/spinlock.h> | |
40a839fd | 30 | #include <linux/interrupt.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
c1d10adb PNA |
32 | |
33 | #include <linux/netfilter.h> | |
dc5fc579 | 34 | #include <net/netlink.h> |
9592a5c0 | 35 | #include <net/sock.h> |
c1d10adb PNA |
36 | #include <net/netfilter/nf_conntrack.h> |
37 | #include <net/netfilter/nf_conntrack_core.h> | |
77ab9cff | 38 | #include <net/netfilter/nf_conntrack_expect.h> |
c1d10adb PNA |
39 | #include <net/netfilter/nf_conntrack_helper.h> |
40 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
605dcad6 | 41 | #include <net/netfilter/nf_conntrack_l4proto.h> |
5b1158e9 | 42 | #include <net/netfilter/nf_conntrack_tuple.h> |
58401572 | 43 | #include <net/netfilter/nf_conntrack_acct.h> |
ef00f89f | 44 | #include <net/netfilter/nf_conntrack_zones.h> |
5b1158e9 JK |
45 | #ifdef CONFIG_NF_NAT_NEEDED |
46 | #include <net/netfilter/nf_nat_core.h> | |
47 | #include <net/netfilter/nf_nat_protocol.h> | |
48 | #endif | |
c1d10adb PNA |
49 | |
50 | #include <linux/netfilter/nfnetlink.h> | |
51 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
52 | ||
53 | MODULE_LICENSE("GPL"); | |
54 | ||
dc808fe2 | 55 | static char __initdata version[] = "0.93"; |
c1d10adb | 56 | |
c1d10adb | 57 | static inline int |
601e68e1 | 58 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
1cde6436 | 59 | const struct nf_conntrack_tuple *tuple, |
605dcad6 | 60 | struct nf_conntrack_l4proto *l4proto) |
c1d10adb | 61 | { |
c1d10adb | 62 | int ret = 0; |
df6fb868 | 63 | struct nlattr *nest_parms; |
c1d10adb | 64 | |
df6fb868 PM |
65 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
66 | if (!nest_parms) | |
67 | goto nla_put_failure; | |
77236b6e | 68 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
c1d10adb | 69 | |
fdf70832 PM |
70 | if (likely(l4proto->tuple_to_nlattr)) |
71 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 72 | |
df6fb868 | 73 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
74 | |
75 | return ret; | |
76 | ||
df6fb868 | 77 | nla_put_failure: |
c1d10adb PNA |
78 | return -1; |
79 | } | |
80 | ||
81 | static inline int | |
1cde6436 PNA |
82 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
83 | const struct nf_conntrack_tuple *tuple, | |
84 | struct nf_conntrack_l3proto *l3proto) | |
c1d10adb | 85 | { |
c1d10adb | 86 | int ret = 0; |
df6fb868 PM |
87 | struct nlattr *nest_parms; |
88 | ||
89 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
90 | if (!nest_parms) | |
91 | goto nla_put_failure; | |
1cde6436 | 92 | |
fdf70832 PM |
93 | if (likely(l3proto->tuple_to_nlattr)) |
94 | ret = l3proto->tuple_to_nlattr(skb, tuple); | |
1cde6436 | 95 | |
df6fb868 | 96 | nla_nest_end(skb, nest_parms); |
c1d10adb | 97 | |
1cde6436 PNA |
98 | return ret; |
99 | ||
df6fb868 | 100 | nla_put_failure: |
1cde6436 PNA |
101 | return -1; |
102 | } | |
103 | ||
bb5cf80e | 104 | static int |
1cde6436 PNA |
105 | ctnetlink_dump_tuples(struct sk_buff *skb, |
106 | const struct nf_conntrack_tuple *tuple) | |
107 | { | |
108 | int ret; | |
109 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 110 | struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 111 | |
528a3a6f | 112 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
1cde6436 | 113 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
c1d10adb PNA |
114 | |
115 | if (unlikely(ret < 0)) | |
116 | return ret; | |
117 | ||
528a3a6f | 118 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
605dcad6 | 119 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
c1d10adb PNA |
120 | |
121 | return ret; | |
c1d10adb PNA |
122 | } |
123 | ||
124 | static inline int | |
125 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) | |
126 | { | |
77236b6e | 127 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
c1d10adb PNA |
128 | return 0; |
129 | ||
df6fb868 | 130 | nla_put_failure: |
c1d10adb PNA |
131 | return -1; |
132 | } | |
133 | ||
134 | static inline int | |
135 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) | |
136 | { | |
77236b6e | 137 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
c1d10adb | 138 | |
77236b6e | 139 | if (timeout < 0) |
c1d10adb | 140 | timeout = 0; |
601e68e1 | 141 | |
77236b6e | 142 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
c1d10adb PNA |
143 | return 0; |
144 | ||
df6fb868 | 145 | nla_put_failure: |
c1d10adb PNA |
146 | return -1; |
147 | } | |
148 | ||
149 | static inline int | |
440f0d58 | 150 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 151 | { |
5e8fbe2a | 152 | struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 153 | struct nlattr *nest_proto; |
c1d10adb PNA |
154 | int ret; |
155 | ||
528a3a6f PNA |
156 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
157 | if (!l4proto->to_nlattr) | |
c1d10adb | 158 | return 0; |
601e68e1 | 159 | |
df6fb868 PM |
160 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
161 | if (!nest_proto) | |
162 | goto nla_put_failure; | |
c1d10adb | 163 | |
fdf70832 | 164 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 165 | |
df6fb868 | 166 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
167 | |
168 | return ret; | |
169 | ||
df6fb868 | 170 | nla_put_failure: |
c1d10adb PNA |
171 | return -1; |
172 | } | |
173 | ||
174 | static inline int | |
175 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) | |
176 | { | |
df6fb868 | 177 | struct nlattr *nest_helper; |
dc808fe2 | 178 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 179 | struct nf_conntrack_helper *helper; |
c1d10adb | 180 | |
3c158f7f | 181 | if (!help) |
c1d10adb | 182 | return 0; |
601e68e1 | 183 | |
3c158f7f PM |
184 | helper = rcu_dereference(help->helper); |
185 | if (!helper) | |
186 | goto out; | |
187 | ||
df6fb868 PM |
188 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
189 | if (!nest_helper) | |
190 | goto nla_put_failure; | |
77236b6e | 191 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
c1d10adb | 192 | |
fdf70832 PM |
193 | if (helper->to_nlattr) |
194 | helper->to_nlattr(skb, ct); | |
c1d10adb | 195 | |
df6fb868 | 196 | nla_nest_end(skb, nest_helper); |
3c158f7f | 197 | out: |
c1d10adb PNA |
198 | return 0; |
199 | ||
df6fb868 | 200 | nla_put_failure: |
c1d10adb PNA |
201 | return -1; |
202 | } | |
203 | ||
bb5cf80e | 204 | static int |
c1d10adb PNA |
205 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
206 | enum ip_conntrack_dir dir) | |
207 | { | |
208 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; | |
df6fb868 | 209 | struct nlattr *nest_count; |
58401572 KPO |
210 | const struct nf_conn_counter *acct; |
211 | ||
212 | acct = nf_conn_acct_find(ct); | |
213 | if (!acct) | |
214 | return 0; | |
c1d10adb | 215 | |
df6fb868 PM |
216 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
217 | if (!nest_count) | |
218 | goto nla_put_failure; | |
219 | ||
58401572 KPO |
220 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
221 | cpu_to_be64(acct[dir].packets)); | |
222 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, | |
223 | cpu_to_be64(acct[dir].bytes)); | |
c1d10adb | 224 | |
df6fb868 | 225 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
226 | |
227 | return 0; | |
228 | ||
df6fb868 | 229 | nla_put_failure: |
c1d10adb PNA |
230 | return -1; |
231 | } | |
c1d10adb PNA |
232 | |
233 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
234 | static inline int | |
235 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) | |
236 | { | |
77236b6e | 237 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
c1d10adb PNA |
238 | return 0; |
239 | ||
df6fb868 | 240 | nla_put_failure: |
c1d10adb PNA |
241 | return -1; |
242 | } | |
243 | #else | |
244 | #define ctnetlink_dump_mark(a, b) (0) | |
245 | #endif | |
246 | ||
37fccd85 PNA |
247 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
248 | static inline int | |
1cc63249 | 249 | ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) |
37fccd85 | 250 | { |
1cc63249 EP |
251 | struct nlattr *nest_secctx; |
252 | int len, ret; | |
253 | char *secctx; | |
254 | ||
255 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
256 | if (ret) | |
257 | return ret; | |
258 | ||
259 | ret = -1; | |
260 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); | |
261 | if (!nest_secctx) | |
262 | goto nla_put_failure; | |
37fccd85 | 263 | |
1cc63249 EP |
264 | NLA_PUT_STRING(skb, CTA_SECCTX_NAME, secctx); |
265 | nla_nest_end(skb, nest_secctx); | |
266 | ||
267 | ret = 0; | |
37fccd85 | 268 | nla_put_failure: |
1cc63249 EP |
269 | security_release_secctx(secctx, len); |
270 | return ret; | |
37fccd85 PNA |
271 | } |
272 | #else | |
1cc63249 | 273 | #define ctnetlink_dump_secctx(a, b) (0) |
37fccd85 PNA |
274 | #endif |
275 | ||
0f417ce9 PNA |
276 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
277 | ||
278 | static inline int | |
279 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) | |
280 | { | |
281 | struct nlattr *nest_parms; | |
282 | ||
283 | if (!(ct->status & IPS_EXPECTED)) | |
284 | return 0; | |
285 | ||
286 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
287 | if (!nest_parms) | |
288 | goto nla_put_failure; | |
289 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
290 | goto nla_put_failure; | |
291 | nla_nest_end(skb, nest_parms); | |
292 | ||
293 | return 0; | |
294 | ||
295 | nla_put_failure: | |
296 | return -1; | |
297 | } | |
298 | ||
13eae15a | 299 | #ifdef CONFIG_NF_NAT_NEEDED |
bb5cf80e | 300 | static int |
13eae15a PNA |
301 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
302 | { | |
13eae15a PNA |
303 | struct nlattr *nest_parms; |
304 | ||
305 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
306 | if (!nest_parms) | |
307 | goto nla_put_failure; | |
308 | ||
77236b6e PM |
309 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
310 | htonl(natseq->correction_pos)); | |
311 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, | |
312 | htonl(natseq->offset_before)); | |
313 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, | |
314 | htonl(natseq->offset_after)); | |
13eae15a PNA |
315 | |
316 | nla_nest_end(skb, nest_parms); | |
317 | ||
318 | return 0; | |
319 | ||
320 | nla_put_failure: | |
321 | return -1; | |
322 | } | |
323 | ||
324 | static inline int | |
325 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) | |
326 | { | |
327 | struct nf_nat_seq *natseq; | |
328 | struct nf_conn_nat *nat = nfct_nat(ct); | |
329 | ||
330 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) | |
331 | return 0; | |
332 | ||
333 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; | |
334 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) | |
335 | return -1; | |
336 | ||
337 | natseq = &nat->seq[IP_CT_DIR_REPLY]; | |
338 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) | |
339 | return -1; | |
340 | ||
341 | return 0; | |
342 | } | |
343 | #else | |
344 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) | |
345 | #endif | |
346 | ||
c1d10adb PNA |
347 | static inline int |
348 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) | |
349 | { | |
77236b6e | 350 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
c1d10adb PNA |
351 | return 0; |
352 | ||
df6fb868 | 353 | nla_put_failure: |
c1d10adb PNA |
354 | return -1; |
355 | } | |
356 | ||
357 | static inline int | |
358 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) | |
359 | { | |
77236b6e | 360 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
c1d10adb PNA |
361 | return 0; |
362 | ||
df6fb868 | 363 | nla_put_failure: |
c1d10adb PNA |
364 | return -1; |
365 | } | |
366 | ||
c1d10adb PNA |
367 | static int |
368 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
440f0d58 | 369 | int event, struct nf_conn *ct) |
c1d10adb PNA |
370 | { |
371 | struct nlmsghdr *nlh; | |
372 | struct nfgenmsg *nfmsg; | |
df6fb868 | 373 | struct nlattr *nest_parms; |
96bcf938 | 374 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
375 | |
376 | event |= NFNL_SUBSYS_CTNETLINK << 8; | |
96bcf938 PNA |
377 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
378 | if (nlh == NULL) | |
379 | goto nlmsg_failure; | |
c1d10adb | 380 | |
96bcf938 | 381 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 382 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
383 | nfmsg->version = NFNETLINK_V0; |
384 | nfmsg->res_id = 0; | |
385 | ||
df6fb868 PM |
386 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
387 | if (!nest_parms) | |
388 | goto nla_put_failure; | |
f2f3e38c | 389 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
390 | goto nla_put_failure; |
391 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 392 | |
df6fb868 PM |
393 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
394 | if (!nest_parms) | |
395 | goto nla_put_failure; | |
f2f3e38c | 396 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
397 | goto nla_put_failure; |
398 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 399 | |
ef00f89f PM |
400 | if (nf_ct_zone(ct)) |
401 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); | |
402 | ||
c1d10adb PNA |
403 | if (ctnetlink_dump_status(skb, ct) < 0 || |
404 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
405 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || | |
406 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || | |
407 | ctnetlink_dump_protoinfo(skb, ct) < 0 || | |
408 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
409 | ctnetlink_dump_mark(skb, ct) < 0 || | |
1cc63249 | 410 | ctnetlink_dump_secctx(skb, ct) < 0 || |
c1d10adb | 411 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 412 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 413 | ctnetlink_dump_master(skb, ct) < 0 || |
13eae15a | 414 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
df6fb868 | 415 | goto nla_put_failure; |
c1d10adb | 416 | |
96bcf938 | 417 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
418 | return skb->len; |
419 | ||
420 | nlmsg_failure: | |
df6fb868 | 421 | nla_put_failure: |
96bcf938 | 422 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
423 | return -1; |
424 | } | |
425 | ||
426 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
03b64f51 PNA |
427 | static inline size_t |
428 | ctnetlink_proto_size(const struct nf_conn *ct) | |
2732c4e4 HE |
429 | { |
430 | struct nf_conntrack_l3proto *l3proto; | |
431 | struct nf_conntrack_l4proto *l4proto; | |
03b64f51 PNA |
432 | size_t len = 0; |
433 | ||
434 | rcu_read_lock(); | |
435 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); | |
436 | len += l3proto->nla_size; | |
437 | ||
438 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
439 | len += l4proto->nla_size; | |
440 | rcu_read_unlock(); | |
441 | ||
442 | return len; | |
443 | } | |
444 | ||
d26e6a02 JP |
445 | static inline size_t |
446 | ctnetlink_counters_size(const struct nf_conn *ct) | |
447 | { | |
448 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) | |
449 | return 0; | |
450 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ | |
451 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ | |
452 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
453 | ; | |
454 | } | |
455 | ||
1cc63249 EP |
456 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
457 | static int ctnetlink_nlmsg_secctx_size(const struct nf_conn *ct) | |
458 | { | |
459 | int len; | |
460 | ||
461 | security_secid_to_secctx(ct->secmark, NULL, &len); | |
462 | ||
463 | return sizeof(char) * len; | |
464 | } | |
465 | #endif | |
466 | ||
03b64f51 PNA |
467 | static inline size_t |
468 | ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
469 | { | |
470 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
471 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
472 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
473 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
474 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
475 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
476 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
d26e6a02 | 477 | + ctnetlink_counters_size(ct) |
03b64f51 PNA |
478 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
479 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
480 | + nla_total_size(0) /* CTA_HELP */ | |
481 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
d271e8bd | 482 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
1cc63249 EP |
483 | + nla_total_size(0) /* CTA_SECCTX */ |
484 | + nla_total_size(ctnetlink_nlmsg_secctx_size(ct)) /* CTA_SECCTX_NAME */ | |
d271e8bd HE |
485 | #endif |
486 | #ifdef CONFIG_NF_NAT_NEEDED | |
03b64f51 PNA |
487 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
488 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
489 | #endif |
490 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 491 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
d271e8bd | 492 | #endif |
03b64f51 PNA |
493 | + ctnetlink_proto_size(ct) |
494 | ; | |
2732c4e4 HE |
495 | } |
496 | ||
e34d5c1a PNA |
497 | static int |
498 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb | 499 | { |
9592a5c0 | 500 | struct net *net; |
c1d10adb PNA |
501 | struct nlmsghdr *nlh; |
502 | struct nfgenmsg *nfmsg; | |
df6fb868 | 503 | struct nlattr *nest_parms; |
19abb7b0 | 504 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
505 | struct sk_buff *skb; |
506 | unsigned int type; | |
c1d10adb | 507 | unsigned int flags = 0, group; |
dd7669a9 | 508 | int err; |
c1d10adb PNA |
509 | |
510 | /* ignore our fake conntrack entry */ | |
5bfddbd4 | 511 | if (nf_ct_is_untracked(ct)) |
e34d5c1a | 512 | return 0; |
c1d10adb | 513 | |
a0891aa6 | 514 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
515 | type = IPCTNL_MSG_CT_DELETE; |
516 | group = NFNLGRP_CONNTRACK_DESTROY; | |
a0891aa6 | 517 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
518 | type = IPCTNL_MSG_CT_NEW; |
519 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 520 | group = NFNLGRP_CONNTRACK_NEW; |
17e6e4ea | 521 | } else if (events) { |
c1d10adb PNA |
522 | type = IPCTNL_MSG_CT_NEW; |
523 | group = NFNLGRP_CONNTRACK_UPDATE; | |
524 | } else | |
e34d5c1a | 525 | return 0; |
a2427692 | 526 | |
9592a5c0 AD |
527 | net = nf_ct_net(ct); |
528 | if (!item->report && !nfnetlink_has_listeners(net, group)) | |
e34d5c1a | 529 | return 0; |
a2427692 | 530 | |
03b64f51 PNA |
531 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
532 | if (skb == NULL) | |
150ace0d | 533 | goto errout; |
c1d10adb | 534 | |
c1d10adb | 535 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
96bcf938 PNA |
536 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
537 | if (nlh == NULL) | |
538 | goto nlmsg_failure; | |
c1d10adb | 539 | |
96bcf938 | 540 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 541 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
542 | nfmsg->version = NFNETLINK_V0; |
543 | nfmsg->res_id = 0; | |
544 | ||
528a3a6f | 545 | rcu_read_lock(); |
df6fb868 PM |
546 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
547 | if (!nest_parms) | |
548 | goto nla_put_failure; | |
f2f3e38c | 549 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 PM |
550 | goto nla_put_failure; |
551 | nla_nest_end(skb, nest_parms); | |
601e68e1 | 552 | |
df6fb868 PM |
553 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
554 | if (!nest_parms) | |
555 | goto nla_put_failure; | |
f2f3e38c | 556 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 PM |
557 | goto nla_put_failure; |
558 | nla_nest_end(skb, nest_parms); | |
c1d10adb | 559 | |
ef00f89f PM |
560 | if (nf_ct_zone(ct)) |
561 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); | |
562 | ||
1eedf699 EL |
563 | if (ctnetlink_dump_id(skb, ct) < 0) |
564 | goto nla_put_failure; | |
565 | ||
e57dce60 FH |
566 | if (ctnetlink_dump_status(skb, ct) < 0) |
567 | goto nla_put_failure; | |
568 | ||
a0891aa6 | 569 | if (events & (1 << IPCT_DESTROY)) { |
7b621c1e PNA |
570 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
571 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) | |
df6fb868 | 572 | goto nla_put_failure; |
7b621c1e | 573 | } else { |
7b621c1e | 574 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 575 | goto nla_put_failure; |
7b621c1e | 576 | |
a0891aa6 | 577 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 578 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 579 | goto nla_put_failure; |
7b621c1e | 580 | |
a0891aa6 | 581 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 582 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 583 | goto nla_put_failure; |
7b621c1e | 584 | |
ff660c80 | 585 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 586 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
1cc63249 | 587 | && ctnetlink_dump_secctx(skb, ct) < 0) |
37fccd85 | 588 | goto nla_put_failure; |
ff660c80 | 589 | #endif |
7b621c1e | 590 | |
a0891aa6 | 591 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
592 | ctnetlink_dump_master(skb, ct) < 0) |
593 | goto nla_put_failure; | |
594 | ||
a0891aa6 | 595 | if (events & (1 << IPCT_NATSEQADJ) && |
13eae15a PNA |
596 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
597 | goto nla_put_failure; | |
7b621c1e | 598 | } |
b9a37e0c | 599 | |
a83099a6 | 600 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 601 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
602 | && ctnetlink_dump_mark(skb, ct) < 0) |
603 | goto nla_put_failure; | |
604 | #endif | |
528a3a6f | 605 | rcu_read_unlock(); |
a83099a6 | 606 | |
96bcf938 | 607 | nlmsg_end(skb, nlh); |
9592a5c0 | 608 | err = nfnetlink_send(skb, net, item->pid, group, item->report, |
cd8c20b6 | 609 | GFP_ATOMIC); |
dd7669a9 PNA |
610 | if (err == -ENOBUFS || err == -EAGAIN) |
611 | return -ENOBUFS; | |
612 | ||
e34d5c1a | 613 | return 0; |
c1d10adb | 614 | |
df6fb868 | 615 | nla_put_failure: |
528a3a6f | 616 | rcu_read_unlock(); |
96bcf938 | 617 | nlmsg_cancel(skb, nlh); |
528a3a6f | 618 | nlmsg_failure: |
c1d10adb | 619 | kfree_skb(skb); |
150ace0d | 620 | errout: |
37b7ef72 PNA |
621 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
622 | return -ENOBUFS; | |
623 | ||
e34d5c1a | 624 | return 0; |
c1d10adb PNA |
625 | } |
626 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
627 | ||
628 | static int ctnetlink_done(struct netlink_callback *cb) | |
629 | { | |
89f2e218 PM |
630 | if (cb->args[1]) |
631 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
c1d10adb PNA |
632 | return 0; |
633 | } | |
634 | ||
635 | static int | |
636 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
637 | { | |
9592a5c0 | 638 | struct net *net = sock_net(skb->sk); |
89f2e218 | 639 | struct nf_conn *ct, *last; |
c1d10adb | 640 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 641 | struct hlist_nulls_node *n; |
96bcf938 | 642 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 643 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 644 | |
76507f69 | 645 | rcu_read_lock(); |
d205dc40 | 646 | last = (struct nf_conn *)cb->args[1]; |
9ab99d5a | 647 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
89f2e218 | 648 | restart: |
9592a5c0 | 649 | hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[cb->args[0]], |
ea781f19 | 650 | hnnode) { |
5b1158e9 | 651 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
652 | continue; |
653 | ct = nf_ct_tuplehash_to_ctrack(h); | |
ea781f19 ED |
654 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
655 | continue; | |
87711cb8 PNA |
656 | /* Dump entries of a given L3 protocol number. |
657 | * If it is not specified, ie. l3proto == 0, | |
658 | * then dump everything. */ | |
5e8fbe2a | 659 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
ea781f19 | 660 | goto releasect; |
d205dc40 PM |
661 | if (cb->args[1]) { |
662 | if (ct != last) | |
ea781f19 | 663 | goto releasect; |
d205dc40 | 664 | cb->args[1] = 0; |
89f2e218 | 665 | } |
c1d10adb | 666 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
601e68e1 | 667 | cb->nlh->nlmsg_seq, |
8b0a231d | 668 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
89f2e218 | 669 | cb->args[1] = (unsigned long)ct; |
c1d10adb | 670 | goto out; |
89f2e218 | 671 | } |
58401572 | 672 | |
01f34848 | 673 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
58401572 KPO |
674 | IPCTNL_MSG_CT_GET_CTRZERO) { |
675 | struct nf_conn_counter *acct; | |
676 | ||
677 | acct = nf_conn_acct_find(ct); | |
678 | if (acct) | |
679 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); | |
680 | } | |
ea781f19 ED |
681 | releasect: |
682 | nf_ct_put(ct); | |
89f2e218 | 683 | } |
d205dc40 | 684 | if (cb->args[1]) { |
89f2e218 PM |
685 | cb->args[1] = 0; |
686 | goto restart; | |
c1d10adb PNA |
687 | } |
688 | } | |
89f2e218 | 689 | out: |
76507f69 | 690 | rcu_read_unlock(); |
d205dc40 PM |
691 | if (last) |
692 | nf_ct_put(last); | |
c1d10adb | 693 | |
c1d10adb PNA |
694 | return skb->len; |
695 | } | |
696 | ||
c1d10adb | 697 | static inline int |
df6fb868 | 698 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
c1d10adb | 699 | { |
df6fb868 | 700 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
701 | struct nf_conntrack_l3proto *l3proto; |
702 | int ret = 0; | |
703 | ||
df6fb868 | 704 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
c1d10adb | 705 | |
cd91566e FW |
706 | rcu_read_lock(); |
707 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); | |
c1d10adb | 708 | |
f73e924c PM |
709 | if (likely(l3proto->nlattr_to_tuple)) { |
710 | ret = nla_validate_nested(attr, CTA_IP_MAX, | |
711 | l3proto->nla_policy); | |
712 | if (ret == 0) | |
713 | ret = l3proto->nlattr_to_tuple(tb, tuple); | |
714 | } | |
c1d10adb | 715 | |
cd91566e | 716 | rcu_read_unlock(); |
c1d10adb | 717 | |
c1d10adb PNA |
718 | return ret; |
719 | } | |
720 | ||
f73e924c PM |
721 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
722 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
723 | }; |
724 | ||
725 | static inline int | |
df6fb868 | 726 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
c1d10adb PNA |
727 | struct nf_conntrack_tuple *tuple) |
728 | { | |
df6fb868 | 729 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
605dcad6 | 730 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
731 | int ret = 0; |
732 | ||
f73e924c PM |
733 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
734 | if (ret < 0) | |
735 | return ret; | |
c1d10adb | 736 | |
df6fb868 | 737 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 738 | return -EINVAL; |
77236b6e | 739 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 740 | |
cd91566e FW |
741 | rcu_read_lock(); |
742 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 743 | |
f73e924c PM |
744 | if (likely(l4proto->nlattr_to_tuple)) { |
745 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
746 | l4proto->nla_policy); | |
747 | if (ret == 0) | |
748 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
749 | } | |
c1d10adb | 750 | |
cd91566e | 751 | rcu_read_unlock(); |
601e68e1 | 752 | |
c1d10adb PNA |
753 | return ret; |
754 | } | |
755 | ||
d0b0268f PM |
756 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
757 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
758 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
759 | }; | |
760 | ||
bb5cf80e | 761 | static int |
39938324 PM |
762 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
763 | struct nf_conntrack_tuple *tuple, | |
c1d10adb PNA |
764 | enum ctattr_tuple type, u_int8_t l3num) |
765 | { | |
df6fb868 | 766 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
767 | int err; |
768 | ||
c1d10adb PNA |
769 | memset(tuple, 0, sizeof(*tuple)); |
770 | ||
d0b0268f | 771 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
c1d10adb | 772 | |
df6fb868 | 773 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
774 | return -EINVAL; |
775 | ||
776 | tuple->src.l3num = l3num; | |
777 | ||
df6fb868 | 778 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
779 | if (err < 0) |
780 | return err; | |
781 | ||
df6fb868 | 782 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
783 | return -EINVAL; |
784 | ||
df6fb868 | 785 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
786 | if (err < 0) |
787 | return err; | |
788 | ||
789 | /* orig and expect tuples get DIR_ORIGINAL */ | |
790 | if (type == CTA_TUPLE_REPLY) | |
791 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
792 | else | |
793 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
794 | ||
c1d10adb PNA |
795 | return 0; |
796 | } | |
797 | ||
ef00f89f PM |
798 | static int |
799 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) | |
800 | { | |
801 | if (attr) | |
802 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
803 | *zone = ntohs(nla_get_be16(attr)); | |
804 | #else | |
805 | return -EOPNOTSUPP; | |
806 | #endif | |
807 | else | |
808 | *zone = 0; | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
d0b0268f PM |
813 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
814 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING }, | |
815 | }; | |
816 | ||
c1d10adb | 817 | static inline int |
39938324 | 818 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name) |
c1d10adb | 819 | { |
df6fb868 | 820 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 821 | |
d0b0268f | 822 | nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
c1d10adb | 823 | |
df6fb868 | 824 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
825 | return -EINVAL; |
826 | ||
df6fb868 | 827 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb PNA |
828 | |
829 | return 0; | |
830 | } | |
831 | ||
f73e924c | 832 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
833 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
834 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 835 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
836 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
837 | [CTA_HELP] = { .type = NLA_NESTED }, | |
838 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
839 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
840 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 841 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
842 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
843 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
ef00f89f | 844 | [CTA_ZONE] = { .type = NLA_U16 }, |
c1d10adb PNA |
845 | }; |
846 | ||
847 | static int | |
601e68e1 | 848 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
849 | const struct nlmsghdr *nlh, |
850 | const struct nlattr * const cda[]) | |
c1d10adb | 851 | { |
9592a5c0 | 852 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
853 | struct nf_conntrack_tuple_hash *h; |
854 | struct nf_conntrack_tuple tuple; | |
855 | struct nf_conn *ct; | |
96bcf938 | 856 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 857 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
858 | u16 zone; |
859 | int err; | |
860 | ||
861 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
862 | if (err < 0) | |
863 | return err; | |
c1d10adb | 864 | |
df6fb868 | 865 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 866 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 867 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
868 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
869 | else { | |
870 | /* Flush the whole table */ | |
9592a5c0 | 871 | nf_conntrack_flush_report(net, |
274d383b PNA |
872 | NETLINK_CB(skb).pid, |
873 | nlmsg_report(nlh)); | |
c1d10adb PNA |
874 | return 0; |
875 | } | |
876 | ||
877 | if (err < 0) | |
878 | return err; | |
879 | ||
ef00f89f | 880 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 881 | if (!h) |
c1d10adb | 882 | return -ENOENT; |
c1d10adb PNA |
883 | |
884 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 885 | |
df6fb868 | 886 | if (cda[CTA_ID]) { |
77236b6e | 887 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 888 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
889 | nf_ct_put(ct); |
890 | return -ENOENT; | |
891 | } | |
601e68e1 | 892 | } |
c1d10adb | 893 | |
dd7669a9 PNA |
894 | if (nf_conntrack_event_report(IPCT_DESTROY, ct, |
895 | NETLINK_CB(skb).pid, | |
896 | nlmsg_report(nlh)) < 0) { | |
897 | nf_ct_delete_from_lists(ct); | |
898 | /* we failed to report the event, try later */ | |
899 | nf_ct_insert_dying_list(ct); | |
900 | nf_ct_put(ct); | |
901 | return 0; | |
902 | } | |
19abb7b0 PNA |
903 | |
904 | /* death_by_timeout would report the event again */ | |
905 | set_bit(IPS_DYING_BIT, &ct->status); | |
906 | ||
51091764 | 907 | nf_ct_kill(ct); |
c1d10adb | 908 | nf_ct_put(ct); |
c1d10adb PNA |
909 | |
910 | return 0; | |
911 | } | |
912 | ||
913 | static int | |
601e68e1 | 914 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
915 | const struct nlmsghdr *nlh, |
916 | const struct nlattr * const cda[]) | |
c1d10adb | 917 | { |
9592a5c0 | 918 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
919 | struct nf_conntrack_tuple_hash *h; |
920 | struct nf_conntrack_tuple tuple; | |
921 | struct nf_conn *ct; | |
922 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 923 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 924 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
925 | u16 zone; |
926 | int err; | |
c1d10adb | 927 | |
58401572 | 928 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
c702e804 TG |
929 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
930 | ctnetlink_done); | |
c1d10adb | 931 | |
ef00f89f PM |
932 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
933 | if (err < 0) | |
934 | return err; | |
935 | ||
df6fb868 | 936 | if (cda[CTA_TUPLE_ORIG]) |
c1d10adb | 937 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
df6fb868 | 938 | else if (cda[CTA_TUPLE_REPLY]) |
c1d10adb PNA |
939 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
940 | else | |
941 | return -EINVAL; | |
942 | ||
943 | if (err < 0) | |
944 | return err; | |
945 | ||
ef00f89f | 946 | h = nf_conntrack_find_get(net, zone, &tuple); |
9ea8cfd6 | 947 | if (!h) |
c1d10adb | 948 | return -ENOENT; |
9ea8cfd6 | 949 | |
c1d10adb PNA |
950 | ct = nf_ct_tuplehash_to_ctrack(h); |
951 | ||
952 | err = -ENOMEM; | |
96bcf938 PNA |
953 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
954 | if (skb2 == NULL) { | |
c1d10adb PNA |
955 | nf_ct_put(ct); |
956 | return -ENOMEM; | |
957 | } | |
c1d10adb | 958 | |
528a3a6f | 959 | rcu_read_lock(); |
601e68e1 | 960 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
8b0a231d | 961 | IPCTNL_MSG_CT_NEW, ct); |
528a3a6f | 962 | rcu_read_unlock(); |
c1d10adb PNA |
963 | nf_ct_put(ct); |
964 | if (err <= 0) | |
965 | goto free; | |
966 | ||
967 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
968 | if (err < 0) | |
969 | goto out; | |
970 | ||
c1d10adb PNA |
971 | return 0; |
972 | ||
973 | free: | |
974 | kfree_skb(skb2); | |
975 | out: | |
976 | return err; | |
977 | } | |
978 | ||
67671841 | 979 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
980 | static int |
981 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
982 | enum nf_nat_manip_type manip, | |
39938324 | 983 | const struct nlattr *attr) |
e6a7d3c0 PNA |
984 | { |
985 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; | |
986 | ||
987 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); | |
988 | if (!parse_nat_setup) { | |
95a5afca | 989 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 990 | rcu_read_unlock(); |
748085fc | 991 | spin_unlock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
992 | nfnl_unlock(); |
993 | if (request_module("nf-nat-ipv4") < 0) { | |
994 | nfnl_lock(); | |
748085fc | 995 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
996 | rcu_read_lock(); |
997 | return -EOPNOTSUPP; | |
998 | } | |
999 | nfnl_lock(); | |
748085fc | 1000 | spin_lock_bh(&nf_conntrack_lock); |
e6a7d3c0 PNA |
1001 | rcu_read_lock(); |
1002 | if (nfnetlink_parse_nat_setup_hook) | |
1003 | return -EAGAIN; | |
1004 | #endif | |
1005 | return -EOPNOTSUPP; | |
1006 | } | |
1007 | ||
1008 | return parse_nat_setup(ct, manip, attr); | |
1009 | } | |
67671841 | 1010 | #endif |
e6a7d3c0 | 1011 | |
bb5cf80e | 1012 | static int |
39938324 | 1013 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1014 | { |
1015 | unsigned long d; | |
77236b6e | 1016 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
1017 | d = ct->status ^ status; |
1018 | ||
1019 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
1020 | /* unchangeable */ | |
0adf9d67 | 1021 | return -EBUSY; |
601e68e1 | 1022 | |
c1d10adb PNA |
1023 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
1024 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 1025 | return -EBUSY; |
601e68e1 | 1026 | |
c1d10adb PNA |
1027 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
1028 | /* ASSURED bit can only be set */ | |
0adf9d67 | 1029 | return -EBUSY; |
c1d10adb | 1030 | |
c1d10adb PNA |
1031 | /* Be careful here, modifying NAT bits can screw up things, |
1032 | * so don't let users modify them directly if they don't pass | |
5b1158e9 | 1033 | * nf_nat_range. */ |
c1d10adb PNA |
1034 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
1035 | return 0; | |
1036 | } | |
1037 | ||
e6a7d3c0 | 1038 | static int |
39938324 | 1039 | ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1040 | { |
1041 | #ifdef CONFIG_NF_NAT_NEEDED | |
1042 | int ret; | |
1043 | ||
1044 | if (cda[CTA_NAT_DST]) { | |
1045 | ret = ctnetlink_parse_nat_setup(ct, | |
1046 | IP_NAT_MANIP_DST, | |
1047 | cda[CTA_NAT_DST]); | |
1048 | if (ret < 0) | |
1049 | return ret; | |
1050 | } | |
1051 | if (cda[CTA_NAT_SRC]) { | |
1052 | ret = ctnetlink_parse_nat_setup(ct, | |
1053 | IP_NAT_MANIP_SRC, | |
1054 | cda[CTA_NAT_SRC]); | |
1055 | if (ret < 0) | |
1056 | return ret; | |
1057 | } | |
1058 | return 0; | |
1059 | #else | |
1060 | return -EOPNOTSUPP; | |
1061 | #endif | |
1062 | } | |
c1d10adb PNA |
1063 | |
1064 | static inline int | |
39938324 | 1065 | ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1066 | { |
1067 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1068 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1069 | char *helpname = NULL; |
c1d10adb PNA |
1070 | int err; |
1071 | ||
c1d10adb PNA |
1072 | /* don't change helper of sibling connections */ |
1073 | if (ct->master) | |
0adf9d67 | 1074 | return -EBUSY; |
c1d10adb | 1075 | |
df6fb868 | 1076 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
c1d10adb PNA |
1077 | if (err < 0) |
1078 | return err; | |
1079 | ||
df293bbb YK |
1080 | if (!strcmp(helpname, "")) { |
1081 | if (help && help->helper) { | |
c1d10adb PNA |
1082 | /* we had a helper before ... */ |
1083 | nf_ct_remove_expectations(ct); | |
3c158f7f | 1084 | rcu_assign_pointer(help->helper, NULL); |
c1d10adb | 1085 | } |
df293bbb YK |
1086 | |
1087 | return 0; | |
c1d10adb | 1088 | } |
601e68e1 | 1089 | |
794e6871 PM |
1090 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1091 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1092 | if (helper == NULL) { |
1093 | #ifdef CONFIG_MODULES | |
1094 | spin_unlock_bh(&nf_conntrack_lock); | |
1095 | ||
1096 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1097 | spin_lock_bh(&nf_conntrack_lock); | |
1098 | return -EOPNOTSUPP; | |
1099 | } | |
1100 | ||
1101 | spin_lock_bh(&nf_conntrack_lock); | |
794e6871 PM |
1102 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1103 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1104 | if (helper) |
1105 | return -EAGAIN; | |
1106 | #endif | |
0adf9d67 | 1107 | return -EOPNOTSUPP; |
226c0c0e | 1108 | } |
df293bbb | 1109 | |
ceceae1b YK |
1110 | if (help) { |
1111 | if (help->helper == helper) | |
1112 | return 0; | |
1113 | if (help->helper) | |
1114 | return -EBUSY; | |
1115 | /* need to zero data of old helper */ | |
1116 | memset(&help->help, 0, sizeof(help->help)); | |
1117 | } else { | |
a88e22ad PNA |
1118 | /* we cannot set a helper for an existing conntrack */ |
1119 | return -EOPNOTSUPP; | |
ceceae1b | 1120 | } |
df293bbb | 1121 | |
3c158f7f | 1122 | rcu_assign_pointer(help->helper, helper); |
c1d10adb PNA |
1123 | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | static inline int | |
39938324 | 1128 | ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1129 | { |
77236b6e | 1130 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
601e68e1 | 1131 | |
c1d10adb PNA |
1132 | if (!del_timer(&ct->timeout)) |
1133 | return -ETIME; | |
1134 | ||
1135 | ct->timeout.expires = jiffies + timeout * HZ; | |
1136 | add_timer(&ct->timeout); | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
d0b0268f PM |
1141 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1142 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1143 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1144 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1145 | }; | |
1146 | ||
c1d10adb | 1147 | static inline int |
39938324 | 1148 | ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb | 1149 | { |
39938324 PM |
1150 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
1151 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; | |
605dcad6 | 1152 | struct nf_conntrack_l4proto *l4proto; |
c1d10adb PNA |
1153 | int err = 0; |
1154 | ||
d0b0268f | 1155 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
c1d10adb | 1156 | |
cd91566e FW |
1157 | rcu_read_lock(); |
1158 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1159 | if (l4proto->from_nlattr) |
1160 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1161 | rcu_read_unlock(); |
c1d10adb PNA |
1162 | |
1163 | return err; | |
1164 | } | |
1165 | ||
13eae15a | 1166 | #ifdef CONFIG_NF_NAT_NEEDED |
d0b0268f PM |
1167 | static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = { |
1168 | [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1169 | [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1170 | [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
1171 | }; | |
1172 | ||
13eae15a | 1173 | static inline int |
39938324 | 1174 | change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr) |
13eae15a PNA |
1175 | { |
1176 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; | |
1177 | ||
d0b0268f | 1178 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy); |
13eae15a PNA |
1179 | |
1180 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) | |
1181 | return -EINVAL; | |
1182 | ||
1183 | natseq->correction_pos = | |
77236b6e | 1184 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
13eae15a PNA |
1185 | |
1186 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) | |
1187 | return -EINVAL; | |
1188 | ||
1189 | natseq->offset_before = | |
77236b6e | 1190 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
13eae15a PNA |
1191 | |
1192 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) | |
1193 | return -EINVAL; | |
1194 | ||
1195 | natseq->offset_after = | |
77236b6e | 1196 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
13eae15a PNA |
1197 | |
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | static int | |
39938324 PM |
1202 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, |
1203 | const struct nlattr * const cda[]) | |
13eae15a PNA |
1204 | { |
1205 | int ret = 0; | |
1206 | struct nf_conn_nat *nat = nfct_nat(ct); | |
1207 | ||
1208 | if (!nat) | |
1209 | return 0; | |
1210 | ||
1211 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { | |
1212 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], | |
1213 | cda[CTA_NAT_SEQ_ADJ_ORIG]); | |
1214 | if (ret < 0) | |
1215 | return ret; | |
1216 | ||
1217 | ct->status |= IPS_SEQ_ADJUST; | |
1218 | } | |
1219 | ||
1220 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1221 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], | |
1222 | cda[CTA_NAT_SEQ_ADJ_REPLY]); | |
1223 | if (ret < 0) | |
1224 | return ret; | |
1225 | ||
1226 | ct->status |= IPS_SEQ_ADJUST; | |
1227 | } | |
1228 | ||
1229 | return 0; | |
1230 | } | |
1231 | #endif | |
1232 | ||
c1d10adb | 1233 | static int |
39938324 PM |
1234 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1235 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1236 | { |
1237 | int err; | |
1238 | ||
e098360f PNA |
1239 | /* only allow NAT changes and master assignation for new conntracks */ |
1240 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1241 | return -EOPNOTSUPP; | |
1242 | ||
df6fb868 | 1243 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1244 | err = ctnetlink_change_helper(ct, cda); |
1245 | if (err < 0) | |
1246 | return err; | |
1247 | } | |
1248 | ||
df6fb868 | 1249 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1250 | err = ctnetlink_change_timeout(ct, cda); |
1251 | if (err < 0) | |
1252 | return err; | |
1253 | } | |
1254 | ||
df6fb868 | 1255 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1256 | err = ctnetlink_change_status(ct, cda); |
1257 | if (err < 0) | |
1258 | return err; | |
1259 | } | |
1260 | ||
df6fb868 | 1261 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1262 | err = ctnetlink_change_protoinfo(ct, cda); |
1263 | if (err < 0) | |
1264 | return err; | |
1265 | } | |
1266 | ||
bcd1e830 | 1267 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1268 | if (cda[CTA_MARK]) |
77236b6e | 1269 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1270 | #endif |
1271 | ||
13eae15a PNA |
1272 | #ifdef CONFIG_NF_NAT_NEEDED |
1273 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1274 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
1275 | if (err < 0) | |
1276 | return err; | |
1277 | } | |
1278 | #endif | |
1279 | ||
c1d10adb PNA |
1280 | return 0; |
1281 | } | |
1282 | ||
f0a3c086 | 1283 | static struct nf_conn * |
ef00f89f | 1284 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
9592a5c0 | 1285 | const struct nlattr * const cda[], |
c1d10adb | 1286 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1287 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1288 | u8 u3) |
c1d10adb PNA |
1289 | { |
1290 | struct nf_conn *ct; | |
1291 | int err = -EINVAL; | |
ceceae1b | 1292 | struct nf_conntrack_helper *helper; |
c1d10adb | 1293 | |
ef00f89f | 1294 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1295 | if (IS_ERR(ct)) |
f0a3c086 | 1296 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1297 | |
df6fb868 | 1298 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1299 | goto err1; |
77236b6e | 1300 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
c1d10adb PNA |
1301 | |
1302 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; | |
c1d10adb | 1303 | |
1575e7ea | 1304 | rcu_read_lock(); |
226c0c0e | 1305 | if (cda[CTA_HELP]) { |
29fe1b48 | 1306 | char *helpname = NULL; |
226c0c0e PNA |
1307 | |
1308 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); | |
0f5b3e85 PM |
1309 | if (err < 0) |
1310 | goto err2; | |
226c0c0e | 1311 | |
794e6871 PM |
1312 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1313 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1314 | if (helper == NULL) { |
1315 | rcu_read_unlock(); | |
1316 | #ifdef CONFIG_MODULES | |
1317 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1318 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1319 | goto err1; |
226c0c0e PNA |
1320 | } |
1321 | ||
1322 | rcu_read_lock(); | |
794e6871 PM |
1323 | helper = __nf_conntrack_helper_find(helpname, |
1324 | nf_ct_l3num(ct), | |
1325 | nf_ct_protonum(ct)); | |
226c0c0e | 1326 | if (helper) { |
226c0c0e | 1327 | err = -EAGAIN; |
0f5b3e85 | 1328 | goto err2; |
226c0c0e PNA |
1329 | } |
1330 | rcu_read_unlock(); | |
1331 | #endif | |
1332 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1333 | goto err1; |
226c0c0e PNA |
1334 | } else { |
1335 | struct nf_conn_help *help; | |
1336 | ||
1337 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); | |
1338 | if (help == NULL) { | |
226c0c0e | 1339 | err = -ENOMEM; |
0f5b3e85 | 1340 | goto err2; |
226c0c0e PNA |
1341 | } |
1342 | ||
1343 | /* not in hash table yet so not strictly necessary */ | |
1344 | rcu_assign_pointer(help->helper, helper); | |
1345 | } | |
1346 | } else { | |
1347 | /* try an implicit helper assignation */ | |
b2a15a60 | 1348 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1349 | if (err < 0) |
1350 | goto err2; | |
1575e7ea PNA |
1351 | } |
1352 | ||
a88e22ad PNA |
1353 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
1354 | err = ctnetlink_change_nat(ct, cda); | |
0f5b3e85 PM |
1355 | if (err < 0) |
1356 | goto err2; | |
e6a7d3c0 PNA |
1357 | } |
1358 | ||
a88e22ad PNA |
1359 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
1360 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); | |
1361 | /* we must add conntrack extensions before confirmation. */ | |
1362 | ct->status |= IPS_CONFIRMED; | |
1363 | ||
1364 | if (cda[CTA_STATUS]) { | |
1365 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1366 | if (err < 0) |
1367 | goto err2; | |
bbb3357d | 1368 | } |
c1d10adb | 1369 | |
c969aa7d PNA |
1370 | #ifdef CONFIG_NF_NAT_NEEDED |
1371 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { | |
1372 | err = ctnetlink_change_nat_seq_adj(ct, cda); | |
0f5b3e85 PM |
1373 | if (err < 0) |
1374 | goto err2; | |
c969aa7d PNA |
1375 | } |
1376 | #endif | |
1377 | ||
df6fb868 | 1378 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1379 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1380 | if (err < 0) |
1381 | goto err2; | |
c1d10adb PNA |
1382 | } |
1383 | ||
bcd1e830 | 1384 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1385 | if (cda[CTA_MARK]) |
77236b6e | 1386 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1387 | #endif |
1388 | ||
5faa1f4c | 1389 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
1390 | if (cda[CTA_TUPLE_MASTER]) { |
1391 | struct nf_conntrack_tuple master; | |
1392 | struct nf_conntrack_tuple_hash *master_h; | |
1393 | struct nf_conn *master_ct; | |
1394 | ||
1395 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); | |
1396 | if (err < 0) | |
0f5b3e85 | 1397 | goto err2; |
7ec47496 | 1398 | |
ef00f89f | 1399 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
1400 | if (master_h == NULL) { |
1401 | err = -ENOENT; | |
0f5b3e85 | 1402 | goto err2; |
7ec47496 PNA |
1403 | } |
1404 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 1405 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 1406 | ct->master = master_ct; |
f2a89004 | 1407 | } |
5faa1f4c | 1408 | |
c1d10adb PNA |
1409 | add_timer(&ct->timeout); |
1410 | nf_conntrack_hash_insert(ct); | |
58a3c9bb | 1411 | rcu_read_unlock(); |
dafc741c | 1412 | |
f0a3c086 | 1413 | return ct; |
c1d10adb | 1414 | |
0f5b3e85 PM |
1415 | err2: |
1416 | rcu_read_unlock(); | |
1417 | err1: | |
c1d10adb | 1418 | nf_conntrack_free(ct); |
f0a3c086 | 1419 | return ERR_PTR(err); |
c1d10adb PNA |
1420 | } |
1421 | ||
601e68e1 YH |
1422 | static int |
1423 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1424 | const struct nlmsghdr *nlh, |
1425 | const struct nlattr * const cda[]) | |
c1d10adb | 1426 | { |
9592a5c0 | 1427 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1428 | struct nf_conntrack_tuple otuple, rtuple; |
1429 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 1430 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1431 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1432 | u16 zone; |
1433 | int err; | |
1434 | ||
1435 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1436 | if (err < 0) | |
1437 | return err; | |
c1d10adb | 1438 | |
df6fb868 | 1439 | if (cda[CTA_TUPLE_ORIG]) { |
c1d10adb PNA |
1440 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
1441 | if (err < 0) | |
1442 | return err; | |
1443 | } | |
1444 | ||
df6fb868 | 1445 | if (cda[CTA_TUPLE_REPLY]) { |
c1d10adb PNA |
1446 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
1447 | if (err < 0) | |
1448 | return err; | |
1449 | } | |
1450 | ||
f8ba1aff | 1451 | spin_lock_bh(&nf_conntrack_lock); |
df6fb868 | 1452 | if (cda[CTA_TUPLE_ORIG]) |
ef00f89f | 1453 | h = __nf_conntrack_find(net, zone, &otuple); |
df6fb868 | 1454 | else if (cda[CTA_TUPLE_REPLY]) |
ef00f89f | 1455 | h = __nf_conntrack_find(net, zone, &rtuple); |
c1d10adb PNA |
1456 | |
1457 | if (h == NULL) { | |
c1d10adb | 1458 | err = -ENOENT; |
f0a3c086 PNA |
1459 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
1460 | struct nf_conn *ct; | |
fecc1133 | 1461 | enum ip_conntrack_events events; |
5faa1f4c | 1462 | |
ef00f89f | 1463 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
f0a3c086 PNA |
1464 | &rtuple, u3); |
1465 | if (IS_ERR(ct)) { | |
1466 | err = PTR_ERR(ct); | |
5faa1f4c PNA |
1467 | goto out_unlock; |
1468 | } | |
f0a3c086 PNA |
1469 | err = 0; |
1470 | nf_conntrack_get(&ct->ct_general); | |
1471 | spin_unlock_bh(&nf_conntrack_lock); | |
fecc1133 PNA |
1472 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
1473 | events = IPCT_RELATED; | |
1474 | else | |
1475 | events = IPCT_NEW; | |
1476 | ||
858b3133 PM |
1477 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1478 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1479 | (1 << IPCT_HELPER) | |
1480 | (1 << IPCT_PROTOINFO) | | |
1481 | (1 << IPCT_NATSEQADJ) | | |
1482 | (1 << IPCT_MARK) | events, | |
1483 | ct, NETLINK_CB(skb).pid, | |
1484 | nlmsg_report(nlh)); | |
f0a3c086 PNA |
1485 | nf_ct_put(ct); |
1486 | } else | |
1487 | spin_unlock_bh(&nf_conntrack_lock); | |
5faa1f4c | 1488 | |
c1d10adb PNA |
1489 | return err; |
1490 | } | |
1491 | /* implicit 'else' */ | |
1492 | ||
c1d10adb PNA |
1493 | /* We manipulate the conntrack inside the global conntrack table lock, |
1494 | * so there's no need to increase the refcount */ | |
c1d10adb | 1495 | err = -EEXIST; |
ff4ca827 | 1496 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
1497 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
1498 | ||
19abb7b0 PNA |
1499 | err = ctnetlink_change_conntrack(ct, cda); |
1500 | if (err == 0) { | |
1501 | nf_conntrack_get(&ct->ct_general); | |
1502 | spin_unlock_bh(&nf_conntrack_lock); | |
858b3133 PM |
1503 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
1504 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
1505 | (1 << IPCT_HELPER) | |
1506 | (1 << IPCT_PROTOINFO) | | |
1507 | (1 << IPCT_NATSEQADJ) | | |
1508 | (1 << IPCT_MARK), | |
1509 | ct, NETLINK_CB(skb).pid, | |
1510 | nlmsg_report(nlh)); | |
19abb7b0 PNA |
1511 | nf_ct_put(ct); |
1512 | } else | |
1513 | spin_unlock_bh(&nf_conntrack_lock); | |
1514 | ||
1515 | return err; | |
ff4ca827 | 1516 | } |
c1d10adb PNA |
1517 | |
1518 | out_unlock: | |
f8ba1aff | 1519 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1520 | return err; |
1521 | } | |
1522 | ||
601e68e1 YH |
1523 | /*********************************************************************** |
1524 | * EXPECT | |
1525 | ***********************************************************************/ | |
c1d10adb PNA |
1526 | |
1527 | static inline int | |
1528 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, | |
1529 | const struct nf_conntrack_tuple *tuple, | |
1530 | enum ctattr_expect type) | |
1531 | { | |
df6fb868 | 1532 | struct nlattr *nest_parms; |
601e68e1 | 1533 | |
df6fb868 PM |
1534 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
1535 | if (!nest_parms) | |
1536 | goto nla_put_failure; | |
c1d10adb | 1537 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
1538 | goto nla_put_failure; |
1539 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
1540 | |
1541 | return 0; | |
1542 | ||
df6fb868 | 1543 | nla_put_failure: |
c1d10adb | 1544 | return -1; |
601e68e1 | 1545 | } |
c1d10adb | 1546 | |
1cde6436 PNA |
1547 | static inline int |
1548 | ctnetlink_exp_dump_mask(struct sk_buff *skb, | |
1549 | const struct nf_conntrack_tuple *tuple, | |
d4156e8c | 1550 | const struct nf_conntrack_tuple_mask *mask) |
1cde6436 PNA |
1551 | { |
1552 | int ret; | |
1553 | struct nf_conntrack_l3proto *l3proto; | |
605dcad6 | 1554 | struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 1555 | struct nf_conntrack_tuple m; |
df6fb868 | 1556 | struct nlattr *nest_parms; |
d4156e8c PM |
1557 | |
1558 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 1559 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
1560 | m.src.u.all = mask->src.u.all; |
1561 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 1562 | |
df6fb868 PM |
1563 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
1564 | if (!nest_parms) | |
1565 | goto nla_put_failure; | |
1cde6436 | 1566 | |
528a3a6f | 1567 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
d4156e8c | 1568 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
1cde6436 PNA |
1569 | |
1570 | if (unlikely(ret < 0)) | |
df6fb868 | 1571 | goto nla_put_failure; |
1cde6436 | 1572 | |
528a3a6f | 1573 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
d4156e8c | 1574 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
1cde6436 | 1575 | if (unlikely(ret < 0)) |
df6fb868 | 1576 | goto nla_put_failure; |
1cde6436 | 1577 | |
df6fb868 | 1578 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
1579 | |
1580 | return 0; | |
1581 | ||
df6fb868 | 1582 | nla_put_failure: |
1cde6436 PNA |
1583 | return -1; |
1584 | } | |
1585 | ||
bb5cf80e | 1586 | static int |
c1d10adb | 1587 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 1588 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1589 | { |
1590 | struct nf_conn *master = exp->master; | |
d978e5da | 1591 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
bc01befd | 1592 | struct nf_conn_help *help; |
d978e5da PM |
1593 | |
1594 | if (timeout < 0) | |
1595 | timeout = 0; | |
c1d10adb PNA |
1596 | |
1597 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 1598 | goto nla_put_failure; |
1cde6436 | 1599 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 1600 | goto nla_put_failure; |
c1d10adb PNA |
1601 | if (ctnetlink_exp_dump_tuple(skb, |
1602 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
1603 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 1604 | goto nla_put_failure; |
601e68e1 | 1605 | |
d978e5da | 1606 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
77236b6e | 1607 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
8b008faf | 1608 | NLA_PUT_BE32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)); |
bc01befd PNA |
1609 | help = nfct_help(master); |
1610 | if (help) { | |
1611 | struct nf_conntrack_helper *helper; | |
1612 | ||
1613 | helper = rcu_dereference(help->helper); | |
1614 | if (helper) | |
1615 | NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name); | |
1616 | } | |
c1d10adb PNA |
1617 | |
1618 | return 0; | |
601e68e1 | 1619 | |
df6fb868 | 1620 | nla_put_failure: |
c1d10adb PNA |
1621 | return -1; |
1622 | } | |
1623 | ||
1624 | static int | |
1625 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, | |
8b0a231d | 1626 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
1627 | { |
1628 | struct nlmsghdr *nlh; | |
1629 | struct nfgenmsg *nfmsg; | |
96bcf938 | 1630 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
c1d10adb PNA |
1631 | |
1632 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; | |
96bcf938 PNA |
1633 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
1634 | if (nlh == NULL) | |
1635 | goto nlmsg_failure; | |
c1d10adb | 1636 | |
96bcf938 | 1637 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1638 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1639 | nfmsg->version = NFNETLINK_V0; | |
1640 | nfmsg->res_id = 0; | |
1641 | ||
1642 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 1643 | goto nla_put_failure; |
c1d10adb | 1644 | |
96bcf938 | 1645 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
1646 | return skb->len; |
1647 | ||
1648 | nlmsg_failure: | |
df6fb868 | 1649 | nla_put_failure: |
96bcf938 | 1650 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
1651 | return -1; |
1652 | } | |
1653 | ||
1654 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
1655 | static int |
1656 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 1657 | { |
9592a5c0 AD |
1658 | struct nf_conntrack_expect *exp = item->exp; |
1659 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
1660 | struct nlmsghdr *nlh; |
1661 | struct nfgenmsg *nfmsg; | |
c1d10adb | 1662 | struct sk_buff *skb; |
ebbf41df | 1663 | unsigned int type, group; |
c1d10adb PNA |
1664 | int flags = 0; |
1665 | ||
ebbf41df PNA |
1666 | if (events & (1 << IPEXP_DESTROY)) { |
1667 | type = IPCTNL_MSG_EXP_DELETE; | |
1668 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; | |
1669 | } else if (events & (1 << IPEXP_NEW)) { | |
c1d10adb PNA |
1670 | type = IPCTNL_MSG_EXP_NEW; |
1671 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
ebbf41df | 1672 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
c1d10adb | 1673 | } else |
e34d5c1a | 1674 | return 0; |
c1d10adb | 1675 | |
ebbf41df | 1676 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
e34d5c1a | 1677 | return 0; |
b3a27bfb | 1678 | |
96bcf938 PNA |
1679 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1680 | if (skb == NULL) | |
150ace0d | 1681 | goto errout; |
c1d10adb | 1682 | |
b633ad5f | 1683 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
96bcf938 PNA |
1684 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
1685 | if (nlh == NULL) | |
1686 | goto nlmsg_failure; | |
c1d10adb | 1687 | |
96bcf938 | 1688 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
1689 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
1690 | nfmsg->version = NFNETLINK_V0; | |
1691 | nfmsg->res_id = 0; | |
1692 | ||
528a3a6f | 1693 | rcu_read_lock(); |
c1d10adb | 1694 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
df6fb868 | 1695 | goto nla_put_failure; |
528a3a6f | 1696 | rcu_read_unlock(); |
c1d10adb | 1697 | |
96bcf938 | 1698 | nlmsg_end(skb, nlh); |
ebbf41df | 1699 | nfnetlink_send(skb, net, item->pid, group, item->report, GFP_ATOMIC); |
e34d5c1a | 1700 | return 0; |
c1d10adb | 1701 | |
df6fb868 | 1702 | nla_put_failure: |
528a3a6f | 1703 | rcu_read_unlock(); |
96bcf938 | 1704 | nlmsg_cancel(skb, nlh); |
528a3a6f | 1705 | nlmsg_failure: |
c1d10adb | 1706 | kfree_skb(skb); |
150ace0d | 1707 | errout: |
9592a5c0 | 1708 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 1709 | return 0; |
c1d10adb PNA |
1710 | } |
1711 | #endif | |
cf6994c2 PM |
1712 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
1713 | { | |
31f15875 PM |
1714 | if (cb->args[1]) |
1715 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
1716 | return 0; |
1717 | } | |
c1d10adb PNA |
1718 | |
1719 | static int | |
1720 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
1721 | { | |
9592a5c0 | 1722 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 1723 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 1724 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
31f15875 | 1725 | struct hlist_node *n; |
87711cb8 | 1726 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 1727 | |
7d0742da | 1728 | rcu_read_lock(); |
31f15875 PM |
1729 | last = (struct nf_conntrack_expect *)cb->args[1]; |
1730 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 1731 | restart: |
9b03f38d | 1732 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
31f15875 PM |
1733 | hnode) { |
1734 | if (l3proto && exp->tuple.src.l3num != l3proto) | |
cf6994c2 | 1735 | continue; |
31f15875 PM |
1736 | if (cb->args[1]) { |
1737 | if (exp != last) | |
1738 | continue; | |
1739 | cb->args[1] = 0; | |
1740 | } | |
8b0a231d PNA |
1741 | if (ctnetlink_exp_fill_info(skb, |
1742 | NETLINK_CB(cb->skb).pid, | |
31f15875 PM |
1743 | cb->nlh->nlmsg_seq, |
1744 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 1745 | exp) < 0) { |
7d0742da PM |
1746 | if (!atomic_inc_not_zero(&exp->use)) |
1747 | continue; | |
31f15875 PM |
1748 | cb->args[1] = (unsigned long)exp; |
1749 | goto out; | |
1750 | } | |
cf6994c2 | 1751 | } |
31f15875 PM |
1752 | if (cb->args[1]) { |
1753 | cb->args[1] = 0; | |
1754 | goto restart; | |
cf6994c2 PM |
1755 | } |
1756 | } | |
601e68e1 | 1757 | out: |
7d0742da | 1758 | rcu_read_unlock(); |
cf6994c2 PM |
1759 | if (last) |
1760 | nf_ct_expect_put(last); | |
c1d10adb | 1761 | |
c1d10adb PNA |
1762 | return skb->len; |
1763 | } | |
1764 | ||
f73e924c | 1765 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
d0b0268f PM |
1766 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
1767 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
1768 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
f73e924c PM |
1769 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
1770 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
d0b0268f | 1771 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING }, |
bcac0dfa | 1772 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, |
8b008faf | 1773 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, |
c1d10adb PNA |
1774 | }; |
1775 | ||
1776 | static int | |
601e68e1 | 1777 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1778 | const struct nlmsghdr *nlh, |
1779 | const struct nlattr * const cda[]) | |
c1d10adb | 1780 | { |
9592a5c0 | 1781 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
1782 | struct nf_conntrack_tuple tuple; |
1783 | struct nf_conntrack_expect *exp; | |
1784 | struct sk_buff *skb2; | |
96bcf938 | 1785 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1786 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
1787 | u16 zone; |
1788 | int err; | |
c1d10adb | 1789 | |
c1d10adb | 1790 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
c702e804 TG |
1791 | return netlink_dump_start(ctnl, skb, nlh, |
1792 | ctnetlink_exp_dump_table, | |
cf6994c2 | 1793 | ctnetlink_exp_done); |
c1d10adb PNA |
1794 | } |
1795 | ||
ef00f89f PM |
1796 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1797 | if (err < 0) | |
1798 | return err; | |
1799 | ||
df6fb868 | 1800 | if (cda[CTA_EXPECT_MASTER]) |
c1d10adb PNA |
1801 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
1802 | else | |
1803 | return -EINVAL; | |
1804 | ||
1805 | if (err < 0) | |
1806 | return err; | |
1807 | ||
ef00f89f | 1808 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
1809 | if (!exp) |
1810 | return -ENOENT; | |
1811 | ||
df6fb868 | 1812 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1813 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1814 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1815 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1816 | return -ENOENT; |
1817 | } | |
601e68e1 | 1818 | } |
c1d10adb PNA |
1819 | |
1820 | err = -ENOMEM; | |
96bcf938 PNA |
1821 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1822 | if (skb2 == NULL) | |
c1d10adb | 1823 | goto out; |
4e9b8269 | 1824 | |
528a3a6f | 1825 | rcu_read_lock(); |
601e68e1 | 1826 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
8b0a231d | 1827 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 1828 | rcu_read_unlock(); |
c1d10adb PNA |
1829 | if (err <= 0) |
1830 | goto free; | |
1831 | ||
6823645d | 1832 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1833 | |
1834 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1835 | ||
1836 | free: | |
1837 | kfree_skb(skb2); | |
1838 | out: | |
6823645d | 1839 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1840 | return err; |
1841 | } | |
1842 | ||
1843 | static int | |
601e68e1 | 1844 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
39938324 PM |
1845 | const struct nlmsghdr *nlh, |
1846 | const struct nlattr * const cda[]) | |
c1d10adb | 1847 | { |
9592a5c0 | 1848 | struct net *net = sock_net(ctnl); |
31f15875 | 1849 | struct nf_conntrack_expect *exp; |
c1d10adb | 1850 | struct nf_conntrack_tuple tuple; |
96bcf938 | 1851 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
31f15875 | 1852 | struct hlist_node *n, *next; |
c1d10adb | 1853 | u_int8_t u3 = nfmsg->nfgen_family; |
31f15875 | 1854 | unsigned int i; |
ef00f89f | 1855 | u16 zone; |
c1d10adb PNA |
1856 | int err; |
1857 | ||
df6fb868 | 1858 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 1859 | /* delete a single expect by tuple */ |
ef00f89f PM |
1860 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
1861 | if (err < 0) | |
1862 | return err; | |
1863 | ||
c1d10adb PNA |
1864 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
1865 | if (err < 0) | |
1866 | return err; | |
1867 | ||
1868 | /* bump usage count to 2 */ | |
ef00f89f | 1869 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
c1d10adb PNA |
1870 | if (!exp) |
1871 | return -ENOENT; | |
1872 | ||
df6fb868 | 1873 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 1874 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 1875 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 1876 | nf_ct_expect_put(exp); |
c1d10adb PNA |
1877 | return -ENOENT; |
1878 | } | |
1879 | } | |
1880 | ||
1881 | /* after list removal, usage count == 1 */ | |
ebbf41df PNA |
1882 | spin_lock_bh(&nf_conntrack_lock); |
1883 | if (del_timer(&exp->timeout)) { | |
1884 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).pid, | |
1885 | nlmsg_report(nlh)); | |
1886 | nf_ct_expect_put(exp); | |
1887 | } | |
1888 | spin_unlock_bh(&nf_conntrack_lock); | |
601e68e1 | 1889 | /* have to put what we 'get' above. |
c1d10adb | 1890 | * after this line usage count == 0 */ |
6823645d | 1891 | nf_ct_expect_put(exp); |
df6fb868 PM |
1892 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
1893 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
31f15875 | 1894 | struct nf_conn_help *m_help; |
c1d10adb PNA |
1895 | |
1896 | /* delete all expectations for this helper */ | |
f8ba1aff | 1897 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1898 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1899 | hlist_for_each_entry_safe(exp, n, next, | |
9592a5c0 | 1900 | &net->ct.expect_hash[i], |
31f15875 PM |
1901 | hnode) { |
1902 | m_help = nfct_help(exp->master); | |
794e6871 PM |
1903 | if (!strcmp(m_help->helper->name, name) && |
1904 | del_timer(&exp->timeout)) { | |
ebbf41df PNA |
1905 | nf_ct_unlink_expect_report(exp, |
1906 | NETLINK_CB(skb).pid, | |
1907 | nlmsg_report(nlh)); | |
31f15875 PM |
1908 | nf_ct_expect_put(exp); |
1909 | } | |
c1d10adb PNA |
1910 | } |
1911 | } | |
f8ba1aff | 1912 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1913 | } else { |
1914 | /* This basically means we have to flush everything*/ | |
f8ba1aff | 1915 | spin_lock_bh(&nf_conntrack_lock); |
31f15875 PM |
1916 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
1917 | hlist_for_each_entry_safe(exp, n, next, | |
9592a5c0 | 1918 | &net->ct.expect_hash[i], |
31f15875 PM |
1919 | hnode) { |
1920 | if (del_timer(&exp->timeout)) { | |
ebbf41df PNA |
1921 | nf_ct_unlink_expect_report(exp, |
1922 | NETLINK_CB(skb).pid, | |
1923 | nlmsg_report(nlh)); | |
31f15875 PM |
1924 | nf_ct_expect_put(exp); |
1925 | } | |
c1d10adb PNA |
1926 | } |
1927 | } | |
f8ba1aff | 1928 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb PNA |
1929 | } |
1930 | ||
1931 | return 0; | |
1932 | } | |
1933 | static int | |
39938324 PM |
1934 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
1935 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1936 | { |
1937 | return -EOPNOTSUPP; | |
1938 | } | |
1939 | ||
1940 | static int | |
ef00f89f PM |
1941 | ctnetlink_create_expect(struct net *net, u16 zone, |
1942 | const struct nlattr * const cda[], | |
9592a5c0 | 1943 | u_int8_t u3, |
39938324 | 1944 | u32 pid, int report) |
c1d10adb PNA |
1945 | { |
1946 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
1947 | struct nf_conntrack_tuple_hash *h = NULL; | |
1948 | struct nf_conntrack_expect *exp; | |
1949 | struct nf_conn *ct; | |
dc808fe2 | 1950 | struct nf_conn_help *help; |
c1d10adb PNA |
1951 | int err = 0; |
1952 | ||
c1d10adb PNA |
1953 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
1954 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); | |
1955 | if (err < 0) | |
1956 | return err; | |
1957 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); | |
1958 | if (err < 0) | |
1959 | return err; | |
1960 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); | |
1961 | if (err < 0) | |
1962 | return err; | |
1963 | ||
1964 | /* Look for master conntrack of this expectation */ | |
ef00f89f | 1965 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
c1d10adb PNA |
1966 | if (!h) |
1967 | return -ENOENT; | |
1968 | ct = nf_ct_tuplehash_to_ctrack(h); | |
6823645d | 1969 | exp = nf_ct_expect_alloc(ct); |
c1d10adb PNA |
1970 | if (!exp) { |
1971 | err = -ENOMEM; | |
1972 | goto out; | |
1973 | } | |
bc01befd PNA |
1974 | help = nfct_help(ct); |
1975 | if (!help) { | |
1976 | if (!cda[CTA_EXPECT_TIMEOUT]) { | |
1977 | err = -EINVAL; | |
1978 | goto out; | |
1979 | } | |
1980 | exp->timeout.expires = | |
1981 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
601e68e1 | 1982 | |
bc01befd PNA |
1983 | exp->flags = NF_CT_EXPECT_USERSPACE; |
1984 | if (cda[CTA_EXPECT_FLAGS]) { | |
1985 | exp->flags |= | |
1986 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
1987 | } | |
1988 | } else { | |
1989 | if (cda[CTA_EXPECT_FLAGS]) { | |
1990 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
1991 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; | |
1992 | } else | |
1993 | exp->flags = 0; | |
1994 | } | |
601e68e1 | 1995 | |
626ba8fb | 1996 | exp->class = 0; |
c1d10adb | 1997 | exp->expectfn = NULL; |
c1d10adb | 1998 | exp->master = ct; |
9457d851 | 1999 | exp->helper = NULL; |
c1d10adb | 2000 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
d4156e8c PM |
2001 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
2002 | exp->mask.src.u.all = mask.src.u.all; | |
c1d10adb | 2003 | |
19abb7b0 | 2004 | err = nf_ct_expect_related_report(exp, pid, report); |
6823645d | 2005 | nf_ct_expect_put(exp); |
c1d10adb | 2006 | |
601e68e1 | 2007 | out: |
c1d10adb PNA |
2008 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
2009 | return err; | |
2010 | } | |
2011 | ||
2012 | static int | |
2013 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
2014 | const struct nlmsghdr *nlh, |
2015 | const struct nlattr * const cda[]) | |
c1d10adb | 2016 | { |
9592a5c0 | 2017 | struct net *net = sock_net(ctnl); |
c1d10adb PNA |
2018 | struct nf_conntrack_tuple tuple; |
2019 | struct nf_conntrack_expect *exp; | |
96bcf938 | 2020 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2021 | u_int8_t u3 = nfmsg->nfgen_family; |
ef00f89f PM |
2022 | u16 zone; |
2023 | int err; | |
c1d10adb | 2024 | |
df6fb868 PM |
2025 | if (!cda[CTA_EXPECT_TUPLE] |
2026 | || !cda[CTA_EXPECT_MASK] | |
2027 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
2028 | return -EINVAL; |
2029 | ||
ef00f89f PM |
2030 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2031 | if (err < 0) | |
2032 | return err; | |
2033 | ||
c1d10adb PNA |
2034 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
2035 | if (err < 0) | |
2036 | return err; | |
2037 | ||
f8ba1aff | 2038 | spin_lock_bh(&nf_conntrack_lock); |
ef00f89f | 2039 | exp = __nf_ct_expect_find(net, zone, &tuple); |
c1d10adb PNA |
2040 | |
2041 | if (!exp) { | |
f8ba1aff | 2042 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 2043 | err = -ENOENT; |
19abb7b0 | 2044 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
ef00f89f | 2045 | err = ctnetlink_create_expect(net, zone, cda, |
19abb7b0 PNA |
2046 | u3, |
2047 | NETLINK_CB(skb).pid, | |
2048 | nlmsg_report(nlh)); | |
2049 | } | |
c1d10adb PNA |
2050 | return err; |
2051 | } | |
2052 | ||
2053 | err = -EEXIST; | |
2054 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
2055 | err = ctnetlink_change_expect(exp, cda); | |
f8ba1aff | 2056 | spin_unlock_bh(&nf_conntrack_lock); |
c1d10adb | 2057 | |
c1d10adb PNA |
2058 | return err; |
2059 | } | |
2060 | ||
2061 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
2062 | static struct nf_ct_event_notifier ctnl_notifier = { |
2063 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
2064 | }; |
2065 | ||
e34d5c1a PNA |
2066 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
2067 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
2068 | }; |
2069 | #endif | |
2070 | ||
7c8d4cb4 | 2071 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 2072 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
2073 | .attr_count = CTA_MAX, |
2074 | .policy = ct_nla_policy }, | |
c1d10adb | 2075 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
2076 | .attr_count = CTA_MAX, |
2077 | .policy = ct_nla_policy }, | |
c1d10adb | 2078 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
2079 | .attr_count = CTA_MAX, |
2080 | .policy = ct_nla_policy }, | |
c1d10adb | 2081 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
2082 | .attr_count = CTA_MAX, |
2083 | .policy = ct_nla_policy }, | |
c1d10adb PNA |
2084 | }; |
2085 | ||
7c8d4cb4 | 2086 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 2087 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
2088 | .attr_count = CTA_EXPECT_MAX, |
2089 | .policy = exp_nla_policy }, | |
c1d10adb | 2090 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
2091 | .attr_count = CTA_EXPECT_MAX, |
2092 | .policy = exp_nla_policy }, | |
c1d10adb | 2093 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
2094 | .attr_count = CTA_EXPECT_MAX, |
2095 | .policy = exp_nla_policy }, | |
c1d10adb PNA |
2096 | }; |
2097 | ||
7c8d4cb4 | 2098 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
2099 | .name = "conntrack", |
2100 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
2101 | .cb_count = IPCTNL_MSG_MAX, | |
2102 | .cb = ctnl_cb, | |
2103 | }; | |
2104 | ||
7c8d4cb4 | 2105 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
2106 | .name = "conntrack_expect", |
2107 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
2108 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
2109 | .cb = ctnl_exp_cb, | |
2110 | }; | |
2111 | ||
d2483dde | 2112 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 2113 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 2114 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb PNA |
2115 | |
2116 | static int __init ctnetlink_init(void) | |
2117 | { | |
2118 | int ret; | |
2119 | ||
654d0fbd | 2120 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
c1d10adb PNA |
2121 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
2122 | if (ret < 0) { | |
654d0fbd | 2123 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
c1d10adb PNA |
2124 | goto err_out; |
2125 | } | |
2126 | ||
2127 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
2128 | if (ret < 0) { | |
654d0fbd | 2129 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
c1d10adb PNA |
2130 | goto err_unreg_subsys; |
2131 | } | |
2132 | ||
2133 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2134 | ret = nf_conntrack_register_notifier(&ctnl_notifier); | |
2135 | if (ret < 0) { | |
654d0fbd | 2136 | pr_err("ctnetlink_init: cannot register notifier.\n"); |
c1d10adb PNA |
2137 | goto err_unreg_exp_subsys; |
2138 | } | |
2139 | ||
6823645d | 2140 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
c1d10adb | 2141 | if (ret < 0) { |
654d0fbd | 2142 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); |
c1d10adb PNA |
2143 | goto err_unreg_notifier; |
2144 | } | |
2145 | #endif | |
2146 | ||
2147 | return 0; | |
2148 | ||
2149 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
2150 | err_unreg_notifier: | |
2151 | nf_conntrack_unregister_notifier(&ctnl_notifier); | |
2152 | err_unreg_exp_subsys: | |
2153 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
2154 | #endif | |
2155 | err_unreg_subsys: | |
2156 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
2157 | err_out: | |
2158 | return ret; | |
2159 | } | |
2160 | ||
2161 | static void __exit ctnetlink_exit(void) | |
2162 | { | |
654d0fbd | 2163 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
c1d10adb | 2164 | |
bc01befd | 2165 | nf_ct_remove_userspace_expectations(); |
c1d10adb | 2166 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
6823645d | 2167 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
c1d10adb PNA |
2168 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
2169 | #endif | |
2170 | ||
2171 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
2172 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
c1d10adb PNA |
2173 | } |
2174 | ||
2175 | module_init(ctnetlink_init); | |
2176 | module_exit(ctnetlink_exit); |