Commit | Line | Data |
---|---|---|
c1d10adb PNA |
1 | /* Connection tracking via netlink socket. Allows for user space |
2 | * protocol helpers and general trouble making from userspace. | |
3 | * | |
4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> | |
dc808fe2 | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
c1d10adb | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
392025f8 | 7 | * (C) 2005-2012 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 | 39 | #include <net/netfilter/nf_conntrack_helper.h> |
41d73ec0 | 40 | #include <net/netfilter/nf_conntrack_seqadj.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> |
a992ca2a | 45 | #include <net/netfilter/nf_conntrack_timestamp.h> |
c539f017 | 46 | #include <net/netfilter/nf_conntrack_labels.h> |
87e94dbc | 47 | #include <net/netfilter/nf_conntrack_synproxy.h> |
5b1158e9 JK |
48 | #ifdef CONFIG_NF_NAT_NEEDED |
49 | #include <net/netfilter/nf_nat_core.h> | |
c7232c99 | 50 | #include <net/netfilter/nf_nat_l4proto.h> |
8c88f87c | 51 | #include <net/netfilter/nf_nat_helper.h> |
5b1158e9 | 52 | #endif |
c1d10adb PNA |
53 | |
54 | #include <linux/netfilter/nfnetlink.h> | |
55 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
56 | ||
57 | MODULE_LICENSE("GPL"); | |
58 | ||
4054ff45 | 59 | static int ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
2a04aabf JL |
60 | const struct nf_conntrack_tuple *tuple, |
61 | const struct nf_conntrack_l4proto *l4proto) | |
c1d10adb | 62 | { |
c1d10adb | 63 | int ret = 0; |
df6fb868 | 64 | struct nlattr *nest_parms; |
c1d10adb | 65 | |
df6fb868 PM |
66 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
67 | if (!nest_parms) | |
68 | goto nla_put_failure; | |
cc1eb431 DM |
69 | if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum)) |
70 | goto nla_put_failure; | |
c1d10adb | 71 | |
fdf70832 PM |
72 | if (likely(l4proto->tuple_to_nlattr)) |
73 | ret = l4proto->tuple_to_nlattr(skb, tuple); | |
601e68e1 | 74 | |
df6fb868 | 75 | nla_nest_end(skb, nest_parms); |
c1d10adb PNA |
76 | |
77 | return ret; | |
78 | ||
df6fb868 | 79 | nla_put_failure: |
c1d10adb PNA |
80 | return -1; |
81 | } | |
82 | ||
f957be9d FW |
83 | static int ipv4_tuple_to_nlattr(struct sk_buff *skb, |
84 | const struct nf_conntrack_tuple *tuple) | |
85 | { | |
86 | if (nla_put_in_addr(skb, CTA_IP_V4_SRC, tuple->src.u3.ip) || | |
87 | nla_put_in_addr(skb, CTA_IP_V4_DST, tuple->dst.u3.ip)) | |
88 | return -EMSGSIZE; | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static int ipv6_tuple_to_nlattr(struct sk_buff *skb, | |
93 | const struct nf_conntrack_tuple *tuple) | |
94 | { | |
95 | if (nla_put_in6_addr(skb, CTA_IP_V6_SRC, &tuple->src.u3.in6) || | |
96 | nla_put_in6_addr(skb, CTA_IP_V6_DST, &tuple->dst.u3.in6)) | |
97 | return -EMSGSIZE; | |
98 | return 0; | |
99 | } | |
100 | ||
4054ff45 | 101 | static int ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
f957be9d | 102 | const struct nf_conntrack_tuple *tuple) |
c1d10adb | 103 | { |
c1d10adb | 104 | int ret = 0; |
df6fb868 PM |
105 | struct nlattr *nest_parms; |
106 | ||
107 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); | |
108 | if (!nest_parms) | |
109 | goto nla_put_failure; | |
1cde6436 | 110 | |
f957be9d FW |
111 | switch (tuple->src.l3num) { |
112 | case NFPROTO_IPV4: | |
113 | ret = ipv4_tuple_to_nlattr(skb, tuple); | |
114 | break; | |
115 | case NFPROTO_IPV6: | |
116 | ret = ipv6_tuple_to_nlattr(skb, tuple); | |
117 | break; | |
118 | } | |
1cde6436 | 119 | |
df6fb868 | 120 | nla_nest_end(skb, nest_parms); |
c1d10adb | 121 | |
1cde6436 PNA |
122 | return ret; |
123 | ||
df6fb868 | 124 | nla_put_failure: |
1cde6436 PNA |
125 | return -1; |
126 | } | |
127 | ||
4054ff45 PNA |
128 | static int ctnetlink_dump_tuples(struct sk_buff *skb, |
129 | const struct nf_conntrack_tuple *tuple) | |
1cde6436 | 130 | { |
b3480fe0 | 131 | const struct nf_conntrack_l4proto *l4proto; |
1cde6436 | 132 | int ret; |
1cde6436 | 133 | |
3b988ece | 134 | rcu_read_lock(); |
f957be9d | 135 | ret = ctnetlink_dump_tuples_ip(skb, tuple); |
c1d10adb | 136 | |
3b988ece HS |
137 | if (ret >= 0) { |
138 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
139 | tuple->dst.protonum); | |
140 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); | |
141 | } | |
142 | rcu_read_unlock(); | |
c1d10adb | 143 | return ret; |
c1d10adb PNA |
144 | } |
145 | ||
4054ff45 PNA |
146 | static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype, |
147 | const struct nf_conntrack_zone *zone, int dir) | |
deedb590 DB |
148 | { |
149 | if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir) | |
150 | return 0; | |
151 | if (nla_put_be16(skb, attrtype, htons(zone->id))) | |
152 | goto nla_put_failure; | |
153 | return 0; | |
154 | ||
155 | nla_put_failure: | |
156 | return -1; | |
157 | } | |
158 | ||
4054ff45 | 159 | static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 160 | { |
cc1eb431 DM |
161 | if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status))) |
162 | goto nla_put_failure; | |
c1d10adb PNA |
163 | return 0; |
164 | ||
df6fb868 | 165 | nla_put_failure: |
c1d10adb PNA |
166 | return -1; |
167 | } | |
168 | ||
4054ff45 | 169 | static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 170 | { |
d0b35b93 | 171 | long timeout = nf_ct_expires(ct) / HZ; |
601e68e1 | 172 | |
cc1eb431 DM |
173 | if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout))) |
174 | goto nla_put_failure; | |
c1d10adb PNA |
175 | return 0; |
176 | ||
df6fb868 | 177 | nla_put_failure: |
c1d10adb PNA |
178 | return -1; |
179 | } | |
180 | ||
4054ff45 | 181 | static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
c1d10adb | 182 | { |
b3480fe0 | 183 | const struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 184 | struct nlattr *nest_proto; |
c1d10adb PNA |
185 | int ret; |
186 | ||
528a3a6f PNA |
187 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
188 | if (!l4proto->to_nlattr) | |
c1d10adb | 189 | return 0; |
601e68e1 | 190 | |
df6fb868 PM |
191 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
192 | if (!nest_proto) | |
193 | goto nla_put_failure; | |
c1d10adb | 194 | |
fdf70832 | 195 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
c1d10adb | 196 | |
df6fb868 | 197 | nla_nest_end(skb, nest_proto); |
c1d10adb PNA |
198 | |
199 | return ret; | |
200 | ||
df6fb868 | 201 | nla_put_failure: |
c1d10adb PNA |
202 | return -1; |
203 | } | |
204 | ||
4054ff45 PNA |
205 | static int ctnetlink_dump_helpinfo(struct sk_buff *skb, |
206 | const struct nf_conn *ct) | |
c1d10adb | 207 | { |
df6fb868 | 208 | struct nlattr *nest_helper; |
dc808fe2 | 209 | const struct nf_conn_help *help = nfct_help(ct); |
3c158f7f | 210 | struct nf_conntrack_helper *helper; |
c1d10adb | 211 | |
3c158f7f | 212 | if (!help) |
c1d10adb | 213 | return 0; |
601e68e1 | 214 | |
3c158f7f PM |
215 | helper = rcu_dereference(help->helper); |
216 | if (!helper) | |
217 | goto out; | |
218 | ||
df6fb868 PM |
219 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
220 | if (!nest_helper) | |
221 | goto nla_put_failure; | |
cc1eb431 DM |
222 | if (nla_put_string(skb, CTA_HELP_NAME, helper->name)) |
223 | goto nla_put_failure; | |
c1d10adb | 224 | |
fdf70832 PM |
225 | if (helper->to_nlattr) |
226 | helper->to_nlattr(skb, ct); | |
c1d10adb | 227 | |
df6fb868 | 228 | nla_nest_end(skb, nest_helper); |
3c158f7f | 229 | out: |
c1d10adb PNA |
230 | return 0; |
231 | ||
df6fb868 | 232 | nla_put_failure: |
c1d10adb PNA |
233 | return -1; |
234 | } | |
235 | ||
bb5cf80e | 236 | static int |
4542fa47 HE |
237 | dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct, |
238 | enum ip_conntrack_dir dir, int type) | |
c1d10adb | 239 | { |
4542fa47 HE |
240 | enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
241 | struct nf_conn_counter *counter = acct->counter; | |
df6fb868 | 242 | struct nlattr *nest_count; |
4542fa47 | 243 | u64 pkts, bytes; |
c1d10adb | 244 | |
4542fa47 HE |
245 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
246 | pkts = atomic64_xchg(&counter[dir].packets, 0); | |
247 | bytes = atomic64_xchg(&counter[dir].bytes, 0); | |
248 | } else { | |
249 | pkts = atomic64_read(&counter[dir].packets); | |
250 | bytes = atomic64_read(&counter[dir].bytes); | |
251 | } | |
252 | ||
253 | nest_count = nla_nest_start(skb, attr | NLA_F_NESTED); | |
df6fb868 PM |
254 | if (!nest_count) |
255 | goto nla_put_failure; | |
256 | ||
b46f6ded ND |
257 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts), |
258 | CTA_COUNTERS_PAD) || | |
259 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes), | |
260 | CTA_COUNTERS_PAD)) | |
cc1eb431 | 261 | goto nla_put_failure; |
c1d10adb | 262 | |
df6fb868 | 263 | nla_nest_end(skb, nest_count); |
c1d10adb PNA |
264 | |
265 | return 0; | |
266 | ||
df6fb868 | 267 | nla_put_failure: |
c1d10adb PNA |
268 | return -1; |
269 | } | |
c1d10adb | 270 | |
80e60e67 | 271 | static int |
4542fa47 | 272 | ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type) |
80e60e67 | 273 | { |
4542fa47 | 274 | struct nf_conn_acct *acct = nf_conn_acct_find(ct); |
80e60e67 | 275 | |
80e60e67 PNA |
276 | if (!acct) |
277 | return 0; | |
278 | ||
4542fa47 HE |
279 | if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0) |
280 | return -1; | |
281 | if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0) | |
282 | return -1; | |
283 | ||
284 | return 0; | |
80e60e67 PNA |
285 | } |
286 | ||
a992ca2a PNA |
287 | static int |
288 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) | |
289 | { | |
290 | struct nlattr *nest_count; | |
291 | const struct nf_conn_tstamp *tstamp; | |
292 | ||
293 | tstamp = nf_conn_tstamp_find(ct); | |
294 | if (!tstamp) | |
295 | return 0; | |
296 | ||
297 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); | |
298 | if (!nest_count) | |
299 | goto nla_put_failure; | |
300 | ||
b46f6ded ND |
301 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start), |
302 | CTA_TIMESTAMP_PAD) || | |
cc1eb431 | 303 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, |
b46f6ded ND |
304 | cpu_to_be64(tstamp->stop), |
305 | CTA_TIMESTAMP_PAD))) | |
cc1eb431 | 306 | goto nla_put_failure; |
a992ca2a PNA |
307 | nla_nest_end(skb, nest_count); |
308 | ||
309 | return 0; | |
310 | ||
311 | nla_put_failure: | |
312 | return -1; | |
313 | } | |
314 | ||
c1d10adb | 315 | #ifdef CONFIG_NF_CONNTRACK_MARK |
4054ff45 | 316 | static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 317 | { |
cc1eb431 DM |
318 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
319 | goto nla_put_failure; | |
c1d10adb PNA |
320 | return 0; |
321 | ||
df6fb868 | 322 | nla_put_failure: |
c1d10adb PNA |
323 | return -1; |
324 | } | |
325 | #else | |
326 | #define ctnetlink_dump_mark(a, b) (0) | |
327 | #endif | |
328 | ||
37fccd85 | 329 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
4054ff45 | 330 | static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) |
37fccd85 | 331 | { |
1cc63249 EP |
332 | struct nlattr *nest_secctx; |
333 | int len, ret; | |
334 | char *secctx; | |
335 | ||
336 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
337 | if (ret) | |
cba85b53 | 338 | return 0; |
1cc63249 EP |
339 | |
340 | ret = -1; | |
341 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); | |
342 | if (!nest_secctx) | |
343 | goto nla_put_failure; | |
37fccd85 | 344 | |
cc1eb431 DM |
345 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
346 | goto nla_put_failure; | |
1cc63249 EP |
347 | nla_nest_end(skb, nest_secctx); |
348 | ||
349 | ret = 0; | |
37fccd85 | 350 | nla_put_failure: |
1cc63249 EP |
351 | security_release_secctx(secctx, len); |
352 | return ret; | |
37fccd85 PNA |
353 | } |
354 | #else | |
1cc63249 | 355 | #define ctnetlink_dump_secctx(a, b) (0) |
37fccd85 PNA |
356 | #endif |
357 | ||
0ceabd83 | 358 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
4a96300c | 359 | static inline int ctnetlink_label_size(const struct nf_conn *ct) |
0ceabd83 FW |
360 | { |
361 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
362 | ||
363 | if (!labels) | |
364 | return 0; | |
23014011 | 365 | return nla_total_size(sizeof(labels->bits)); |
0ceabd83 FW |
366 | } |
367 | ||
368 | static int | |
369 | ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) | |
370 | { | |
371 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); | |
23014011 | 372 | unsigned int i; |
0ceabd83 FW |
373 | |
374 | if (!labels) | |
375 | return 0; | |
376 | ||
0ceabd83 FW |
377 | i = 0; |
378 | do { | |
379 | if (labels->bits[i] != 0) | |
23014011 FW |
380 | return nla_put(skb, CTA_LABELS, sizeof(labels->bits), |
381 | labels->bits); | |
0ceabd83 | 382 | i++; |
23014011 | 383 | } while (i < ARRAY_SIZE(labels->bits)); |
0ceabd83 FW |
384 | |
385 | return 0; | |
386 | } | |
387 | #else | |
388 | #define ctnetlink_dump_labels(a, b) (0) | |
389 | #define ctnetlink_label_size(a) (0) | |
390 | #endif | |
391 | ||
0f417ce9 PNA |
392 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
393 | ||
4054ff45 | 394 | static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
0f417ce9 PNA |
395 | { |
396 | struct nlattr *nest_parms; | |
397 | ||
398 | if (!(ct->status & IPS_EXPECTED)) | |
399 | return 0; | |
400 | ||
401 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); | |
402 | if (!nest_parms) | |
403 | goto nla_put_failure; | |
404 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) | |
405 | goto nla_put_failure; | |
406 | nla_nest_end(skb, nest_parms); | |
407 | ||
408 | return 0; | |
409 | ||
410 | nla_put_failure: | |
411 | return -1; | |
412 | } | |
413 | ||
bb5cf80e | 414 | static int |
41d73ec0 | 415 | dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type) |
13eae15a | 416 | { |
13eae15a PNA |
417 | struct nlattr *nest_parms; |
418 | ||
419 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); | |
420 | if (!nest_parms) | |
421 | goto nla_put_failure; | |
422 | ||
41d73ec0 PM |
423 | if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS, |
424 | htonl(seq->correction_pos)) || | |
425 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE, | |
426 | htonl(seq->offset_before)) || | |
427 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER, | |
428 | htonl(seq->offset_after))) | |
cc1eb431 | 429 | goto nla_put_failure; |
13eae15a PNA |
430 | |
431 | nla_nest_end(skb, nest_parms); | |
432 | ||
433 | return 0; | |
434 | ||
435 | nla_put_failure: | |
436 | return -1; | |
437 | } | |
438 | ||
64f3967c | 439 | static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, struct nf_conn *ct) |
13eae15a | 440 | { |
41d73ec0 PM |
441 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
442 | struct nf_ct_seqadj *seq; | |
13eae15a | 443 | |
41d73ec0 | 444 | if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj) |
13eae15a PNA |
445 | return 0; |
446 | ||
64f3967c | 447 | spin_lock_bh(&ct->lock); |
41d73ec0 PM |
448 | seq = &seqadj->seq[IP_CT_DIR_ORIGINAL]; |
449 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1) | |
64f3967c | 450 | goto err; |
13eae15a | 451 | |
41d73ec0 PM |
452 | seq = &seqadj->seq[IP_CT_DIR_REPLY]; |
453 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1) | |
64f3967c | 454 | goto err; |
13eae15a | 455 | |
64f3967c | 456 | spin_unlock_bh(&ct->lock); |
13eae15a | 457 | return 0; |
64f3967c LZ |
458 | err: |
459 | spin_unlock_bh(&ct->lock); | |
460 | return -1; | |
13eae15a | 461 | } |
13eae15a | 462 | |
20710b3b PNA |
463 | static int ctnetlink_dump_ct_synproxy(struct sk_buff *skb, struct nf_conn *ct) |
464 | { | |
465 | struct nf_conn_synproxy *synproxy = nfct_synproxy(ct); | |
466 | struct nlattr *nest_parms; | |
467 | ||
468 | if (!synproxy) | |
469 | return 0; | |
470 | ||
471 | nest_parms = nla_nest_start(skb, CTA_SYNPROXY | NLA_F_NESTED); | |
472 | if (!nest_parms) | |
473 | goto nla_put_failure; | |
474 | ||
475 | if (nla_put_be32(skb, CTA_SYNPROXY_ISN, htonl(synproxy->isn)) || | |
476 | nla_put_be32(skb, CTA_SYNPROXY_ITS, htonl(synproxy->its)) || | |
477 | nla_put_be32(skb, CTA_SYNPROXY_TSOFF, htonl(synproxy->tsoff))) | |
478 | goto nla_put_failure; | |
479 | ||
480 | nla_nest_end(skb, nest_parms); | |
481 | ||
482 | return 0; | |
483 | ||
484 | nla_put_failure: | |
485 | return -1; | |
486 | } | |
487 | ||
4054ff45 | 488 | static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 489 | { |
cc1eb431 DM |
490 | if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct))) |
491 | goto nla_put_failure; | |
c1d10adb PNA |
492 | return 0; |
493 | ||
df6fb868 | 494 | nla_put_failure: |
c1d10adb PNA |
495 | return -1; |
496 | } | |
497 | ||
4054ff45 | 498 | static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
c1d10adb | 499 | { |
cc1eb431 DM |
500 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
501 | goto nla_put_failure; | |
c1d10adb PNA |
502 | return 0; |
503 | ||
df6fb868 | 504 | nla_put_failure: |
c1d10adb PNA |
505 | return -1; |
506 | } | |
507 | ||
c1d10adb | 508 | static int |
15e47304 | 509 | ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
80e60e67 | 510 | struct nf_conn *ct) |
c1d10adb | 511 | { |
308ac914 | 512 | const struct nf_conntrack_zone *zone; |
c1d10adb PNA |
513 | struct nlmsghdr *nlh; |
514 | struct nfgenmsg *nfmsg; | |
df6fb868 | 515 | struct nlattr *nest_parms; |
15e47304 | 516 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
c1d10adb | 517 | |
dedb67c4 | 518 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW); |
15e47304 | 519 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
520 | if (nlh == NULL) |
521 | goto nlmsg_failure; | |
c1d10adb | 522 | |
96bcf938 | 523 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 524 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
525 | nfmsg->version = NFNETLINK_V0; |
526 | nfmsg->res_id = 0; | |
527 | ||
deedb590 DB |
528 | zone = nf_ct_zone(ct); |
529 | ||
df6fb868 PM |
530 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
531 | if (!nest_parms) | |
532 | goto nla_put_failure; | |
f2f3e38c | 533 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 | 534 | goto nla_put_failure; |
deedb590 DB |
535 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
536 | NF_CT_ZONE_DIR_ORIG) < 0) | |
537 | goto nla_put_failure; | |
df6fb868 | 538 | nla_nest_end(skb, nest_parms); |
601e68e1 | 539 | |
df6fb868 PM |
540 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
541 | if (!nest_parms) | |
542 | goto nla_put_failure; | |
f2f3e38c | 543 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 | 544 | goto nla_put_failure; |
deedb590 DB |
545 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
546 | NF_CT_ZONE_DIR_REPL) < 0) | |
547 | goto nla_put_failure; | |
df6fb868 | 548 | nla_nest_end(skb, nest_parms); |
c1d10adb | 549 | |
deedb590 DB |
550 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
551 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
cc1eb431 | 552 | goto nla_put_failure; |
ef00f89f | 553 | |
c1d10adb PNA |
554 | if (ctnetlink_dump_status(skb, ct) < 0 || |
555 | ctnetlink_dump_timeout(skb, ct) < 0 || | |
4542fa47 | 556 | ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 557 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
c1d10adb PNA |
558 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
559 | ctnetlink_dump_helpinfo(skb, ct) < 0 || | |
560 | ctnetlink_dump_mark(skb, ct) < 0 || | |
1cc63249 | 561 | ctnetlink_dump_secctx(skb, ct) < 0 || |
0ceabd83 | 562 | ctnetlink_dump_labels(skb, ct) < 0 || |
c1d10adb | 563 | ctnetlink_dump_id(skb, ct) < 0 || |
13eae15a | 564 | ctnetlink_dump_use(skb, ct) < 0 || |
0f417ce9 | 565 | ctnetlink_dump_master(skb, ct) < 0 || |
20710b3b PNA |
566 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0 || |
567 | ctnetlink_dump_ct_synproxy(skb, ct) < 0) | |
df6fb868 | 568 | goto nla_put_failure; |
c1d10adb | 569 | |
96bcf938 | 570 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
571 | return skb->len; |
572 | ||
573 | nlmsg_failure: | |
df6fb868 | 574 | nla_put_failure: |
96bcf938 | 575 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
576 | return -1; |
577 | } | |
578 | ||
f957be9d FW |
579 | static const struct nla_policy cta_ip_nla_policy[CTA_IP_MAX + 1] = { |
580 | [CTA_IP_V4_SRC] = { .type = NLA_U32 }, | |
581 | [CTA_IP_V4_DST] = { .type = NLA_U32 }, | |
582 | [CTA_IP_V6_SRC] = { .len = sizeof(__be32) * 4 }, | |
583 | [CTA_IP_V6_DST] = { .len = sizeof(__be32) * 4 }, | |
584 | }; | |
585 | ||
8252fcea | 586 | #if defined(CONFIG_NETFILTER_NETLINK_GLUE_CT) || defined(CONFIG_NF_CONNTRACK_EVENTS) |
5caaed15 | 587 | static size_t ctnetlink_proto_size(const struct nf_conn *ct) |
2732c4e4 | 588 | { |
b3480fe0 | 589 | const struct nf_conntrack_l4proto *l4proto; |
5caaed15 | 590 | size_t len, len4 = 0; |
03b64f51 | 591 | |
f957be9d | 592 | len = nla_policy_len(cta_ip_nla_policy, CTA_IP_MAX + 1); |
0d035100 | 593 | len *= 3u; /* ORIG, REPLY, MASTER */ |
03b64f51 PNA |
594 | |
595 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
39215846 | 596 | len += l4proto->nlattr_size; |
5caaed15 FW |
597 | if (l4proto->nlattr_tuple_size) { |
598 | len4 = l4proto->nlattr_tuple_size(); | |
599 | len4 *= 3u; /* ORIG, REPLY, MASTER */ | |
600 | } | |
03b64f51 | 601 | |
5caaed15 | 602 | return len + len4; |
03b64f51 | 603 | } |
8252fcea | 604 | #endif |
03b64f51 | 605 | |
4a96300c | 606 | static inline size_t ctnetlink_acct_size(const struct nf_conn *ct) |
d26e6a02 JP |
607 | { |
608 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) | |
609 | return 0; | |
610 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ | |
b46f6ded ND |
611 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
612 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ | |
d26e6a02 JP |
613 | ; |
614 | } | |
615 | ||
4a96300c | 616 | static inline int ctnetlink_secctx_size(const struct nf_conn *ct) |
1cc63249 | 617 | { |
cba85b53 PNA |
618 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
619 | int len, ret; | |
1cc63249 | 620 | |
cba85b53 PNA |
621 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
622 | if (ret) | |
623 | return 0; | |
1cc63249 | 624 | |
cba85b53 PNA |
625 | return nla_total_size(0) /* CTA_SECCTX */ |
626 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ | |
627 | #else | |
628 | return 0; | |
1cc63249 | 629 | #endif |
cba85b53 | 630 | } |
1cc63249 | 631 | |
4a96300c | 632 | static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct) |
a992ca2a PNA |
633 | { |
634 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
635 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) | |
636 | return 0; | |
b46f6ded | 637 | return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t)); |
a992ca2a PNA |
638 | #else |
639 | return 0; | |
640 | #endif | |
641 | } | |
642 | ||
4054ff45 PNA |
643 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
644 | static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct) | |
03b64f51 PNA |
645 | { |
646 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) | |
647 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
648 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
649 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
650 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
651 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
652 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
f7b13e43 | 653 | + ctnetlink_acct_size(ct) |
a992ca2a | 654 | + ctnetlink_timestamp_size(ct) |
03b64f51 PNA |
655 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
656 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
657 | + nla_total_size(0) /* CTA_HELP */ | |
658 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
cba85b53 | 659 | + ctnetlink_secctx_size(ct) |
d271e8bd | 660 | #ifdef CONFIG_NF_NAT_NEEDED |
03b64f51 PNA |
661 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
662 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
d271e8bd HE |
663 | #endif |
664 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
03b64f51 | 665 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
4a001068 KM |
666 | #endif |
667 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
deedb590 | 668 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
d271e8bd | 669 | #endif |
03b64f51 | 670 | + ctnetlink_proto_size(ct) |
0ceabd83 | 671 | + ctnetlink_label_size(ct) |
03b64f51 | 672 | ; |
2732c4e4 HE |
673 | } |
674 | ||
e34d5c1a PNA |
675 | static int |
676 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) | |
c1d10adb | 677 | { |
308ac914 | 678 | const struct nf_conntrack_zone *zone; |
9592a5c0 | 679 | struct net *net; |
c1d10adb PNA |
680 | struct nlmsghdr *nlh; |
681 | struct nfgenmsg *nfmsg; | |
df6fb868 | 682 | struct nlattr *nest_parms; |
19abb7b0 | 683 | struct nf_conn *ct = item->ct; |
c1d10adb PNA |
684 | struct sk_buff *skb; |
685 | unsigned int type; | |
c1d10adb | 686 | unsigned int flags = 0, group; |
dd7669a9 | 687 | int err; |
c1d10adb | 688 | |
a0891aa6 | 689 | if (events & (1 << IPCT_DESTROY)) { |
c1d10adb PNA |
690 | type = IPCTNL_MSG_CT_DELETE; |
691 | group = NFNLGRP_CONNTRACK_DESTROY; | |
04b80cea | 692 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
c1d10adb PNA |
693 | type = IPCTNL_MSG_CT_NEW; |
694 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
c1d10adb | 695 | group = NFNLGRP_CONNTRACK_NEW; |
04b80cea | 696 | } else if (events) { |
c1d10adb PNA |
697 | type = IPCTNL_MSG_CT_NEW; |
698 | group = NFNLGRP_CONNTRACK_UPDATE; | |
699 | } else | |
e34d5c1a | 700 | return 0; |
a2427692 | 701 | |
9592a5c0 AD |
702 | net = nf_ct_net(ct); |
703 | if (!item->report && !nfnetlink_has_listeners(net, group)) | |
e34d5c1a | 704 | return 0; |
a2427692 | 705 | |
03b64f51 PNA |
706 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
707 | if (skb == NULL) | |
150ace0d | 708 | goto errout; |
c1d10adb | 709 | |
dedb67c4 | 710 | type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type); |
15e47304 | 711 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
712 | if (nlh == NULL) |
713 | goto nlmsg_failure; | |
c1d10adb | 714 | |
96bcf938 | 715 | nfmsg = nlmsg_data(nlh); |
5e8fbe2a | 716 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
c1d10adb PNA |
717 | nfmsg->version = NFNETLINK_V0; |
718 | nfmsg->res_id = 0; | |
719 | ||
deedb590 DB |
720 | zone = nf_ct_zone(ct); |
721 | ||
df6fb868 PM |
722 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
723 | if (!nest_parms) | |
724 | goto nla_put_failure; | |
f2f3e38c | 725 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
df6fb868 | 726 | goto nla_put_failure; |
deedb590 DB |
727 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
728 | NF_CT_ZONE_DIR_ORIG) < 0) | |
729 | goto nla_put_failure; | |
df6fb868 | 730 | nla_nest_end(skb, nest_parms); |
601e68e1 | 731 | |
df6fb868 PM |
732 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
733 | if (!nest_parms) | |
734 | goto nla_put_failure; | |
f2f3e38c | 735 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
df6fb868 | 736 | goto nla_put_failure; |
deedb590 DB |
737 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
738 | NF_CT_ZONE_DIR_REPL) < 0) | |
739 | goto nla_put_failure; | |
df6fb868 | 740 | nla_nest_end(skb, nest_parms); |
c1d10adb | 741 | |
deedb590 DB |
742 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
743 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
cc1eb431 | 744 | goto nla_put_failure; |
ef00f89f | 745 | |
1eedf699 EL |
746 | if (ctnetlink_dump_id(skb, ct) < 0) |
747 | goto nla_put_failure; | |
748 | ||
e57dce60 FH |
749 | if (ctnetlink_dump_status(skb, ct) < 0) |
750 | goto nla_put_failure; | |
751 | ||
a0891aa6 | 752 | if (events & (1 << IPCT_DESTROY)) { |
4542fa47 | 753 | if (ctnetlink_dump_acct(skb, ct, type) < 0 || |
a992ca2a | 754 | ctnetlink_dump_timestamp(skb, ct) < 0) |
df6fb868 | 755 | goto nla_put_failure; |
7b621c1e | 756 | } else { |
7b621c1e | 757 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
df6fb868 | 758 | goto nla_put_failure; |
7b621c1e | 759 | |
a0891aa6 | 760 | if (events & (1 << IPCT_PROTOINFO) |
7b621c1e | 761 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
df6fb868 | 762 | goto nla_put_failure; |
7b621c1e | 763 | |
a0891aa6 | 764 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
7b621c1e | 765 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
df6fb868 | 766 | goto nla_put_failure; |
7b621c1e | 767 | |
ff660c80 | 768 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
a0891aa6 | 769 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
1cc63249 | 770 | && ctnetlink_dump_secctx(skb, ct) < 0) |
37fccd85 | 771 | goto nla_put_failure; |
ff660c80 | 772 | #endif |
0ceabd83 FW |
773 | if (events & (1 << IPCT_LABEL) && |
774 | ctnetlink_dump_labels(skb, ct) < 0) | |
775 | goto nla_put_failure; | |
7b621c1e | 776 | |
a0891aa6 | 777 | if (events & (1 << IPCT_RELATED) && |
0f417ce9 PNA |
778 | ctnetlink_dump_master(skb, ct) < 0) |
779 | goto nla_put_failure; | |
780 | ||
41d73ec0 PM |
781 | if (events & (1 << IPCT_SEQADJ) && |
782 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) | |
13eae15a | 783 | goto nla_put_failure; |
20710b3b PNA |
784 | |
785 | if (events & (1 << IPCT_SYNPROXY) && | |
786 | ctnetlink_dump_ct_synproxy(skb, ct) < 0) | |
787 | goto nla_put_failure; | |
7b621c1e | 788 | } |
b9a37e0c | 789 | |
a83099a6 | 790 | #ifdef CONFIG_NF_CONNTRACK_MARK |
a0891aa6 | 791 | if ((events & (1 << IPCT_MARK) || ct->mark) |
a83099a6 EL |
792 | && ctnetlink_dump_mark(skb, ct) < 0) |
793 | goto nla_put_failure; | |
794 | #endif | |
96bcf938 | 795 | nlmsg_end(skb, nlh); |
15e47304 | 796 | err = nfnetlink_send(skb, net, item->portid, group, item->report, |
cd8c20b6 | 797 | GFP_ATOMIC); |
dd7669a9 PNA |
798 | if (err == -ENOBUFS || err == -EAGAIN) |
799 | return -ENOBUFS; | |
800 | ||
e34d5c1a | 801 | return 0; |
c1d10adb | 802 | |
df6fb868 | 803 | nla_put_failure: |
96bcf938 | 804 | nlmsg_cancel(skb, nlh); |
528a3a6f | 805 | nlmsg_failure: |
c1d10adb | 806 | kfree_skb(skb); |
150ace0d | 807 | errout: |
37b7ef72 PNA |
808 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
809 | return -ENOBUFS; | |
810 | ||
e34d5c1a | 811 | return 0; |
c1d10adb PNA |
812 | } |
813 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ | |
814 | ||
815 | static int ctnetlink_done(struct netlink_callback *cb) | |
816 | { | |
89f2e218 PM |
817 | if (cb->args[1]) |
818 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
397304b5 | 819 | kfree(cb->data); |
c1d10adb PNA |
820 | return 0; |
821 | } | |
822 | ||
866476f3 | 823 | struct ctnetlink_filter { |
0f298a28 PNA |
824 | struct { |
825 | u_int32_t val; | |
826 | u_int32_t mask; | |
827 | } mark; | |
828 | }; | |
829 | ||
866476f3 KE |
830 | static struct ctnetlink_filter * |
831 | ctnetlink_alloc_filter(const struct nlattr * const cda[]) | |
832 | { | |
833 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
834 | struct ctnetlink_filter *filter; | |
835 | ||
836 | filter = kzalloc(sizeof(*filter), GFP_KERNEL); | |
837 | if (filter == NULL) | |
838 | return ERR_PTR(-ENOMEM); | |
839 | ||
840 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); | |
841 | filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
842 | ||
843 | return filter; | |
844 | #else | |
845 | return ERR_PTR(-EOPNOTSUPP); | |
846 | #endif | |
847 | } | |
848 | ||
849 | static int ctnetlink_filter_match(struct nf_conn *ct, void *data) | |
850 | { | |
851 | struct ctnetlink_filter *filter = data; | |
852 | ||
853 | if (filter == NULL) | |
854 | return 1; | |
855 | ||
856 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
857 | if ((ct->mark & filter->mark.mask) == filter->mark.val) | |
858 | return 1; | |
859 | #endif | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
c1d10adb PNA |
864 | static int |
865 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
866 | { | |
9592a5c0 | 867 | struct net *net = sock_net(skb->sk); |
89f2e218 | 868 | struct nf_conn *ct, *last; |
c1d10adb | 869 | struct nf_conntrack_tuple_hash *h; |
ea781f19 | 870 | struct hlist_nulls_node *n; |
96bcf938 | 871 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 872 | u_int8_t l3proto = nfmsg->nfgen_family; |
2344d64e FW |
873 | struct nf_conn *nf_ct_evict[8]; |
874 | int res, i; | |
93bb0ceb JDB |
875 | spinlock_t *lockp; |
876 | ||
d205dc40 | 877 | last = (struct nf_conn *)cb->args[1]; |
2344d64e | 878 | i = 0; |
93bb0ceb JDB |
879 | |
880 | local_bh_disable(); | |
56d52d48 | 881 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
89f2e218 | 882 | restart: |
2344d64e FW |
883 | while (i) { |
884 | i--; | |
885 | if (nf_ct_should_gc(nf_ct_evict[i])) | |
886 | nf_ct_kill(nf_ct_evict[i]); | |
887 | nf_ct_put(nf_ct_evict[i]); | |
888 | } | |
889 | ||
93bb0ceb | 890 | lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS]; |
b16c2919 | 891 | nf_conntrack_lock(lockp); |
56d52d48 | 892 | if (cb->args[0] >= nf_conntrack_htable_size) { |
93bb0ceb JDB |
893 | spin_unlock(lockp); |
894 | goto out; | |
895 | } | |
56d52d48 FW |
896 | hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]], |
897 | hnnode) { | |
5b1158e9 | 898 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
c1d10adb PNA |
899 | continue; |
900 | ct = nf_ct_tuplehash_to_ctrack(h); | |
2344d64e FW |
901 | if (nf_ct_is_expired(ct)) { |
902 | if (i < ARRAY_SIZE(nf_ct_evict) && | |
903 | atomic_inc_not_zero(&ct->ct_general.use)) | |
904 | nf_ct_evict[i++] = ct; | |
905 | continue; | |
906 | } | |
907 | ||
e0c7d472 FW |
908 | if (!net_eq(net, nf_ct_net(ct))) |
909 | continue; | |
910 | ||
87711cb8 PNA |
911 | /* Dump entries of a given L3 protocol number. |
912 | * If it is not specified, ie. l3proto == 0, | |
913 | * then dump everything. */ | |
5e8fbe2a | 914 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
13ee6ac5 | 915 | continue; |
d205dc40 PM |
916 | if (cb->args[1]) { |
917 | if (ct != last) | |
13ee6ac5 | 918 | continue; |
d205dc40 | 919 | cb->args[1] = 0; |
89f2e218 | 920 | } |
866476f3 | 921 | if (!ctnetlink_filter_match(ct, cb->data)) |
0f298a28 | 922 | continue; |
866476f3 | 923 | |
3b988ece HS |
924 | rcu_read_lock(); |
925 | res = | |
15e47304 | 926 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
3b988ece HS |
927 | cb->nlh->nlmsg_seq, |
928 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
929 | ct); | |
930 | rcu_read_unlock(); | |
931 | if (res < 0) { | |
c71caf41 | 932 | nf_conntrack_get(&ct->ct_general); |
89f2e218 | 933 | cb->args[1] = (unsigned long)ct; |
93bb0ceb | 934 | spin_unlock(lockp); |
c1d10adb | 935 | goto out; |
89f2e218 PM |
936 | } |
937 | } | |
93bb0ceb | 938 | spin_unlock(lockp); |
d205dc40 | 939 | if (cb->args[1]) { |
89f2e218 PM |
940 | cb->args[1] = 0; |
941 | goto restart; | |
c1d10adb PNA |
942 | } |
943 | } | |
89f2e218 | 944 | out: |
93bb0ceb | 945 | local_bh_enable(); |
fefa9267 LZ |
946 | if (last) { |
947 | /* nf ct hash resize happened, now clear the leftover. */ | |
948 | if ((struct nf_conn *)cb->args[1] == last) | |
949 | cb->args[1] = 0; | |
950 | ||
d205dc40 | 951 | nf_ct_put(last); |
fefa9267 | 952 | } |
c1d10adb | 953 | |
2344d64e FW |
954 | while (i) { |
955 | i--; | |
956 | if (nf_ct_should_gc(nf_ct_evict[i])) | |
957 | nf_ct_kill(nf_ct_evict[i]); | |
958 | nf_ct_put(nf_ct_evict[i]); | |
959 | } | |
960 | ||
c1d10adb PNA |
961 | return skb->len; |
962 | } | |
963 | ||
f957be9d FW |
964 | static int ipv4_nlattr_to_tuple(struct nlattr *tb[], |
965 | struct nf_conntrack_tuple *t) | |
966 | { | |
967 | if (!tb[CTA_IP_V4_SRC] || !tb[CTA_IP_V4_DST]) | |
968 | return -EINVAL; | |
969 | ||
970 | t->src.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_SRC]); | |
971 | t->dst.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_DST]); | |
972 | ||
973 | return 0; | |
974 | } | |
975 | ||
976 | static int ipv6_nlattr_to_tuple(struct nlattr *tb[], | |
977 | struct nf_conntrack_tuple *t) | |
978 | { | |
979 | if (!tb[CTA_IP_V6_SRC] || !tb[CTA_IP_V6_DST]) | |
980 | return -EINVAL; | |
981 | ||
982 | t->src.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_SRC]); | |
983 | t->dst.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_DST]); | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
4054ff45 PNA |
988 | static int ctnetlink_parse_tuple_ip(struct nlattr *attr, |
989 | struct nf_conntrack_tuple *tuple) | |
c1d10adb | 990 | { |
df6fb868 | 991 | struct nlattr *tb[CTA_IP_MAX+1]; |
c1d10adb PNA |
992 | int ret = 0; |
993 | ||
fceb6435 | 994 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL, NULL); |
130ffbc2 DB |
995 | if (ret < 0) |
996 | return ret; | |
c1d10adb | 997 | |
f957be9d FW |
998 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
999 | cta_ip_nla_policy, NULL); | |
1000 | if (ret) | |
1001 | return ret; | |
c1d10adb | 1002 | |
f957be9d FW |
1003 | switch (tuple->src.l3num) { |
1004 | case NFPROTO_IPV4: | |
1005 | ret = ipv4_nlattr_to_tuple(tb, tuple); | |
1006 | break; | |
1007 | case NFPROTO_IPV6: | |
1008 | ret = ipv6_nlattr_to_tuple(tb, tuple); | |
1009 | break; | |
f73e924c | 1010 | } |
c1d10adb | 1011 | |
c1d10adb PNA |
1012 | return ret; |
1013 | } | |
1014 | ||
f73e924c PM |
1015 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
1016 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, | |
c1d10adb PNA |
1017 | }; |
1018 | ||
4054ff45 PNA |
1019 | static int ctnetlink_parse_tuple_proto(struct nlattr *attr, |
1020 | struct nf_conntrack_tuple *tuple) | |
c1d10adb | 1021 | { |
b3480fe0 | 1022 | const struct nf_conntrack_l4proto *l4proto; |
df6fb868 | 1023 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
c1d10adb PNA |
1024 | int ret = 0; |
1025 | ||
fceb6435 JB |
1026 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy, |
1027 | NULL); | |
f73e924c PM |
1028 | if (ret < 0) |
1029 | return ret; | |
c1d10adb | 1030 | |
df6fb868 | 1031 | if (!tb[CTA_PROTO_NUM]) |
c1d10adb | 1032 | return -EINVAL; |
77236b6e | 1033 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
c1d10adb | 1034 | |
cd91566e FW |
1035 | rcu_read_lock(); |
1036 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); | |
c1d10adb | 1037 | |
f73e924c PM |
1038 | if (likely(l4proto->nlattr_to_tuple)) { |
1039 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, | |
fceb6435 | 1040 | l4proto->nla_policy, NULL); |
f73e924c PM |
1041 | if (ret == 0) |
1042 | ret = l4proto->nlattr_to_tuple(tb, tuple); | |
1043 | } | |
c1d10adb | 1044 | |
cd91566e | 1045 | rcu_read_unlock(); |
601e68e1 | 1046 | |
c1d10adb PNA |
1047 | return ret; |
1048 | } | |
1049 | ||
deedb590 DB |
1050 | static int |
1051 | ctnetlink_parse_zone(const struct nlattr *attr, | |
1052 | struct nf_conntrack_zone *zone) | |
1053 | { | |
5e8018fc DB |
1054 | nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID, |
1055 | NF_CT_DEFAULT_ZONE_DIR, 0); | |
deedb590 DB |
1056 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
1057 | if (attr) | |
1058 | zone->id = ntohs(nla_get_be16(attr)); | |
1059 | #else | |
1060 | if (attr) | |
1061 | return -EOPNOTSUPP; | |
1062 | #endif | |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static int | |
1067 | ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type, | |
1068 | struct nf_conntrack_zone *zone) | |
1069 | { | |
1070 | int ret; | |
1071 | ||
1072 | if (zone->id != NF_CT_DEFAULT_ZONE_ID) | |
1073 | return -EINVAL; | |
1074 | ||
1075 | ret = ctnetlink_parse_zone(attr, zone); | |
1076 | if (ret < 0) | |
1077 | return ret; | |
1078 | ||
1079 | if (type == CTA_TUPLE_REPLY) | |
1080 | zone->dir = NF_CT_ZONE_DIR_REPL; | |
1081 | else | |
1082 | zone->dir = NF_CT_ZONE_DIR_ORIG; | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
d0b0268f PM |
1087 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
1088 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, | |
1089 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, | |
deedb590 | 1090 | [CTA_TUPLE_ZONE] = { .type = NLA_U16 }, |
d0b0268f PM |
1091 | }; |
1092 | ||
bb5cf80e | 1093 | static int |
39938324 | 1094 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
a2b7cbdd MK |
1095 | struct nf_conntrack_tuple *tuple, u32 type, |
1096 | u_int8_t l3num, struct nf_conntrack_zone *zone) | |
c1d10adb | 1097 | { |
df6fb868 | 1098 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
c1d10adb PNA |
1099 | int err; |
1100 | ||
c1d10adb PNA |
1101 | memset(tuple, 0, sizeof(*tuple)); |
1102 | ||
fceb6435 JB |
1103 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy, |
1104 | NULL); | |
130ffbc2 DB |
1105 | if (err < 0) |
1106 | return err; | |
c1d10adb | 1107 | |
df6fb868 | 1108 | if (!tb[CTA_TUPLE_IP]) |
c1d10adb PNA |
1109 | return -EINVAL; |
1110 | ||
1111 | tuple->src.l3num = l3num; | |
1112 | ||
df6fb868 | 1113 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
c1d10adb PNA |
1114 | if (err < 0) |
1115 | return err; | |
1116 | ||
df6fb868 | 1117 | if (!tb[CTA_TUPLE_PROTO]) |
c1d10adb PNA |
1118 | return -EINVAL; |
1119 | ||
df6fb868 | 1120 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
c1d10adb PNA |
1121 | if (err < 0) |
1122 | return err; | |
1123 | ||
deedb590 DB |
1124 | if (tb[CTA_TUPLE_ZONE]) { |
1125 | if (!zone) | |
1126 | return -EINVAL; | |
1127 | ||
1128 | err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE], | |
1129 | type, zone); | |
1130 | if (err < 0) | |
1131 | return err; | |
1132 | } | |
1133 | ||
c1d10adb PNA |
1134 | /* orig and expect tuples get DIR_ORIGINAL */ |
1135 | if (type == CTA_TUPLE_REPLY) | |
1136 | tuple->dst.dir = IP_CT_DIR_REPLY; | |
1137 | else | |
1138 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; | |
1139 | ||
c1d10adb PNA |
1140 | return 0; |
1141 | } | |
1142 | ||
d0b0268f | 1143 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
6d1fafca FW |
1144 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
1145 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
d0b0268f PM |
1146 | }; |
1147 | ||
4054ff45 PNA |
1148 | static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
1149 | struct nlattr **helpinfo) | |
c1d10adb | 1150 | { |
130ffbc2 | 1151 | int err; |
df6fb868 | 1152 | struct nlattr *tb[CTA_HELP_MAX+1]; |
c1d10adb | 1153 | |
fceb6435 | 1154 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy, NULL); |
130ffbc2 DB |
1155 | if (err < 0) |
1156 | return err; | |
c1d10adb | 1157 | |
df6fb868 | 1158 | if (!tb[CTA_HELP_NAME]) |
c1d10adb PNA |
1159 | return -EINVAL; |
1160 | ||
df6fb868 | 1161 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
c1d10adb | 1162 | |
ae243bee PNA |
1163 | if (tb[CTA_HELP_INFO]) |
1164 | *helpinfo = tb[CTA_HELP_INFO]; | |
1165 | ||
c1d10adb PNA |
1166 | return 0; |
1167 | } | |
1168 | ||
f73e924c | 1169 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
d0b0268f PM |
1170 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
1171 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, | |
f73e924c | 1172 | [CTA_STATUS] = { .type = NLA_U32 }, |
d0b0268f PM |
1173 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
1174 | [CTA_HELP] = { .type = NLA_NESTED }, | |
1175 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, | |
f73e924c PM |
1176 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
1177 | [CTA_MARK] = { .type = NLA_U32 }, | |
f73e924c | 1178 | [CTA_ID] = { .type = NLA_U32 }, |
d0b0268f PM |
1179 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
1180 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, | |
6d1fafca FW |
1181 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
1182 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, | |
ef00f89f | 1183 | [CTA_ZONE] = { .type = NLA_U16 }, |
0f298a28 | 1184 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
9b21f6a9 | 1185 | [CTA_LABELS] = { .type = NLA_BINARY, |
d2bf2f34 | 1186 | .len = NF_CT_LABELS_MAX_SIZE }, |
9b21f6a9 | 1187 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, |
d2bf2f34 | 1188 | .len = NF_CT_LABELS_MAX_SIZE }, |
c1d10adb PNA |
1189 | }; |
1190 | ||
90964016 PNA |
1191 | static int ctnetlink_flush_iterate(struct nf_conn *ct, void *data) |
1192 | { | |
1193 | if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) | |
1194 | return 0; | |
1195 | ||
1196 | return ctnetlink_filter_match(ct, data); | |
1197 | } | |
1198 | ||
866476f3 KE |
1199 | static int ctnetlink_flush_conntrack(struct net *net, |
1200 | const struct nlattr * const cda[], | |
1201 | u32 portid, int report) | |
1202 | { | |
1203 | struct ctnetlink_filter *filter = NULL; | |
1204 | ||
1205 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { | |
1206 | filter = ctnetlink_alloc_filter(cda); | |
1207 | if (IS_ERR(filter)) | |
1208 | return PTR_ERR(filter); | |
1209 | } | |
1210 | ||
90964016 | 1211 | nf_ct_iterate_cleanup_net(net, ctnetlink_flush_iterate, filter, |
9fd6452d | 1212 | portid, report); |
866476f3 KE |
1213 | kfree(filter); |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
7b8002a1 PNA |
1218 | static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl, |
1219 | struct sk_buff *skb, | |
1220 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1221 | const struct nlattr * const cda[], |
1222 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
1223 | { |
1224 | struct nf_conntrack_tuple_hash *h; | |
1225 | struct nf_conntrack_tuple tuple; | |
1226 | struct nf_conn *ct; | |
96bcf938 | 1227 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1228 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 1229 | struct nf_conntrack_zone zone; |
ef00f89f PM |
1230 | int err; |
1231 | ||
1232 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
1233 | if (err < 0) | |
1234 | return err; | |
c1d10adb | 1235 | |
df6fb868 | 1236 | if (cda[CTA_TUPLE_ORIG]) |
deedb590 DB |
1237 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
1238 | u3, &zone); | |
df6fb868 | 1239 | else if (cda[CTA_TUPLE_REPLY]) |
deedb590 DB |
1240 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
1241 | u3, &zone); | |
c1d10adb | 1242 | else { |
866476f3 KE |
1243 | return ctnetlink_flush_conntrack(net, cda, |
1244 | NETLINK_CB(skb).portid, | |
1245 | nlmsg_report(nlh)); | |
c1d10adb PNA |
1246 | } |
1247 | ||
1248 | if (err < 0) | |
1249 | return err; | |
1250 | ||
308ac914 | 1251 | h = nf_conntrack_find_get(net, &zone, &tuple); |
9ea8cfd6 | 1252 | if (!h) |
c1d10adb | 1253 | return -ENOENT; |
c1d10adb PNA |
1254 | |
1255 | ct = nf_ct_tuplehash_to_ctrack(h); | |
601e68e1 | 1256 | |
90964016 PNA |
1257 | if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) { |
1258 | nf_ct_put(ct); | |
1259 | return -EBUSY; | |
1260 | } | |
1261 | ||
df6fb868 | 1262 | if (cda[CTA_ID]) { |
77236b6e | 1263 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
7f85f914 | 1264 | if (id != (u32)(unsigned long)ct) { |
c1d10adb PNA |
1265 | nf_ct_put(ct); |
1266 | return -ENOENT; | |
1267 | } | |
601e68e1 | 1268 | } |
c1d10adb | 1269 | |
f330a7fd | 1270 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); |
c1d10adb | 1271 | nf_ct_put(ct); |
c1d10adb PNA |
1272 | |
1273 | return 0; | |
1274 | } | |
1275 | ||
7b8002a1 PNA |
1276 | static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl, |
1277 | struct sk_buff *skb, | |
1278 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1279 | const struct nlattr * const cda[], |
1280 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
1281 | { |
1282 | struct nf_conntrack_tuple_hash *h; | |
1283 | struct nf_conntrack_tuple tuple; | |
1284 | struct nf_conn *ct; | |
1285 | struct sk_buff *skb2 = NULL; | |
96bcf938 | 1286 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 1287 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 1288 | struct nf_conntrack_zone zone; |
ef00f89f | 1289 | int err; |
c1d10adb | 1290 | |
80d326fa PNA |
1291 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
1292 | struct netlink_dump_control c = { | |
1293 | .dump = ctnetlink_dump_table, | |
1294 | .done = ctnetlink_done, | |
1295 | }; | |
866476f3 | 1296 | |
0f298a28 | 1297 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
866476f3 | 1298 | struct ctnetlink_filter *filter; |
0f298a28 | 1299 | |
866476f3 KE |
1300 | filter = ctnetlink_alloc_filter(cda); |
1301 | if (IS_ERR(filter)) | |
1302 | return PTR_ERR(filter); | |
0f298a28 | 1303 | |
0f298a28 PNA |
1304 | c.data = filter; |
1305 | } | |
80d326fa PNA |
1306 | return netlink_dump_start(ctnl, skb, nlh, &c); |
1307 | } | |
c1d10adb | 1308 | |
ef00f89f PM |
1309 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
1310 | if (err < 0) | |
1311 | return err; | |
1312 | ||
df6fb868 | 1313 | if (cda[CTA_TUPLE_ORIG]) |
deedb590 DB |
1314 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
1315 | u3, &zone); | |
df6fb868 | 1316 | else if (cda[CTA_TUPLE_REPLY]) |
deedb590 DB |
1317 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
1318 | u3, &zone); | |
c1d10adb PNA |
1319 | else |
1320 | return -EINVAL; | |
1321 | ||
1322 | if (err < 0) | |
1323 | return err; | |
1324 | ||
308ac914 | 1325 | h = nf_conntrack_find_get(net, &zone, &tuple); |
9ea8cfd6 | 1326 | if (!h) |
c1d10adb | 1327 | return -ENOENT; |
9ea8cfd6 | 1328 | |
c1d10adb PNA |
1329 | ct = nf_ct_tuplehash_to_ctrack(h); |
1330 | ||
1331 | err = -ENOMEM; | |
96bcf938 PNA |
1332 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1333 | if (skb2 == NULL) { | |
c1d10adb PNA |
1334 | nf_ct_put(ct); |
1335 | return -ENOMEM; | |
1336 | } | |
c1d10adb | 1337 | |
528a3a6f | 1338 | rcu_read_lock(); |
15e47304 | 1339 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, |
80e60e67 | 1340 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
528a3a6f | 1341 | rcu_read_unlock(); |
c1d10adb PNA |
1342 | nf_ct_put(ct); |
1343 | if (err <= 0) | |
1344 | goto free; | |
1345 | ||
15e47304 | 1346 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
c1d10adb PNA |
1347 | if (err < 0) |
1348 | goto out; | |
1349 | ||
c1d10adb PNA |
1350 | return 0; |
1351 | ||
1352 | free: | |
1353 | kfree_skb(skb2); | |
1354 | out: | |
f31e8d49 PNA |
1355 | /* this avoids a loop in nfnetlink. */ |
1356 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
1357 | } |
1358 | ||
d871befe PNA |
1359 | static int ctnetlink_done_list(struct netlink_callback *cb) |
1360 | { | |
1361 | if (cb->args[1]) | |
1362 | nf_ct_put((struct nf_conn *)cb->args[1]); | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | static int | |
b7779d06 | 1367 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying) |
d871befe | 1368 | { |
cd5f336f | 1369 | struct nf_conn *ct, *last; |
d871befe PNA |
1370 | struct nf_conntrack_tuple_hash *h; |
1371 | struct hlist_nulls_node *n; | |
1372 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
1373 | u_int8_t l3proto = nfmsg->nfgen_family; | |
1374 | int res; | |
b7779d06 JDB |
1375 | int cpu; |
1376 | struct hlist_nulls_head *list; | |
1377 | struct net *net = sock_net(skb->sk); | |
d871befe PNA |
1378 | |
1379 | if (cb->args[2]) | |
1380 | return 0; | |
1381 | ||
cd5f336f FW |
1382 | last = (struct nf_conn *)cb->args[1]; |
1383 | ||
b7779d06 JDB |
1384 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
1385 | struct ct_pcpu *pcpu; | |
1386 | ||
1387 | if (!cpu_possible(cpu)) | |
d871befe | 1388 | continue; |
b7779d06 JDB |
1389 | |
1390 | pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu); | |
1391 | spin_lock_bh(&pcpu->lock); | |
b7779d06 JDB |
1392 | list = dying ? &pcpu->dying : &pcpu->unconfirmed; |
1393 | restart: | |
1394 | hlist_nulls_for_each_entry(h, n, list, hnnode) { | |
1395 | ct = nf_ct_tuplehash_to_ctrack(h); | |
1396 | if (l3proto && nf_ct_l3num(ct) != l3proto) | |
d871befe | 1397 | continue; |
b7779d06 JDB |
1398 | if (cb->args[1]) { |
1399 | if (ct != last) | |
1400 | continue; | |
1401 | cb->args[1] = 0; | |
1402 | } | |
1403 | rcu_read_lock(); | |
1404 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
1405 | cb->nlh->nlmsg_seq, | |
1406 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), | |
1407 | ct); | |
1408 | rcu_read_unlock(); | |
1409 | if (res < 0) { | |
cd5f336f FW |
1410 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
1411 | continue; | |
266155b2 | 1412 | cb->args[0] = cpu; |
b7779d06 JDB |
1413 | cb->args[1] = (unsigned long)ct; |
1414 | spin_unlock_bh(&pcpu->lock); | |
1415 | goto out; | |
1416 | } | |
d871befe | 1417 | } |
b7779d06 JDB |
1418 | if (cb->args[1]) { |
1419 | cb->args[1] = 0; | |
1420 | goto restart; | |
266155b2 | 1421 | } |
b7779d06 | 1422 | spin_unlock_bh(&pcpu->lock); |
d871befe | 1423 | } |
266155b2 | 1424 | cb->args[2] = 1; |
d871befe | 1425 | out: |
d871befe PNA |
1426 | if (last) |
1427 | nf_ct_put(last); | |
1428 | ||
1429 | return skb->len; | |
1430 | } | |
1431 | ||
1432 | static int | |
1433 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) | |
1434 | { | |
b7779d06 | 1435 | return ctnetlink_dump_list(skb, cb, true); |
d871befe PNA |
1436 | } |
1437 | ||
7b8002a1 PNA |
1438 | static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl, |
1439 | struct sk_buff *skb, | |
1440 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1441 | const struct nlattr * const cda[], |
1442 | struct netlink_ext_ack *extack) | |
d871befe PNA |
1443 | { |
1444 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1445 | struct netlink_dump_control c = { | |
1446 | .dump = ctnetlink_dump_dying, | |
1447 | .done = ctnetlink_done_list, | |
1448 | }; | |
1449 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1450 | } | |
1451 | ||
1452 | return -EOPNOTSUPP; | |
1453 | } | |
1454 | ||
1455 | static int | |
1456 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) | |
1457 | { | |
b7779d06 | 1458 | return ctnetlink_dump_list(skb, cb, false); |
d871befe PNA |
1459 | } |
1460 | ||
7b8002a1 PNA |
1461 | static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl, |
1462 | struct sk_buff *skb, | |
1463 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
1464 | const struct nlattr * const cda[], |
1465 | struct netlink_ext_ack *extack) | |
d871befe PNA |
1466 | { |
1467 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1468 | struct netlink_dump_control c = { | |
1469 | .dump = ctnetlink_dump_unconfirmed, | |
1470 | .done = ctnetlink_done_list, | |
1471 | }; | |
1472 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
1473 | } | |
1474 | ||
1475 | return -EOPNOTSUPP; | |
1476 | } | |
1477 | ||
67671841 | 1478 | #ifdef CONFIG_NF_NAT_NEEDED |
e6a7d3c0 PNA |
1479 | static int |
1480 | ctnetlink_parse_nat_setup(struct nf_conn *ct, | |
1481 | enum nf_nat_manip_type manip, | |
39938324 | 1482 | const struct nlattr *attr) |
e6a7d3c0 | 1483 | { |
2c205dd3 | 1484 | struct nf_nat_hook *nat_hook; |
c7232c99 | 1485 | int err; |
e6a7d3c0 | 1486 | |
2c205dd3 PNA |
1487 | nat_hook = rcu_dereference(nf_nat_hook); |
1488 | if (!nat_hook) { | |
95a5afca | 1489 | #ifdef CONFIG_MODULES |
e6a7d3c0 | 1490 | rcu_read_unlock(); |
c14b78e7 | 1491 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1492 | if (request_module("nf-nat") < 0) { |
c14b78e7 | 1493 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 PNA |
1494 | rcu_read_lock(); |
1495 | return -EOPNOTSUPP; | |
1496 | } | |
c14b78e7 | 1497 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
e6a7d3c0 | 1498 | rcu_read_lock(); |
c05a45c0 FW |
1499 | nat_hook = rcu_dereference(nf_nat_hook); |
1500 | if (nat_hook) | |
e6a7d3c0 PNA |
1501 | return -EAGAIN; |
1502 | #endif | |
1503 | return -EOPNOTSUPP; | |
1504 | } | |
1505 | ||
2c205dd3 | 1506 | err = nat_hook->parse_nat_setup(ct, manip, attr); |
c7232c99 PM |
1507 | if (err == -EAGAIN) { |
1508 | #ifdef CONFIG_MODULES | |
1509 | rcu_read_unlock(); | |
c14b78e7 | 1510 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 | 1511 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
c14b78e7 | 1512 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1513 | rcu_read_lock(); |
1514 | return -EOPNOTSUPP; | |
1515 | } | |
c14b78e7 | 1516 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
c7232c99 PM |
1517 | rcu_read_lock(); |
1518 | #else | |
1519 | err = -EOPNOTSUPP; | |
1520 | #endif | |
1521 | } | |
1522 | return err; | |
e6a7d3c0 | 1523 | } |
67671841 | 1524 | #endif |
e6a7d3c0 | 1525 | |
53b56da8 LZ |
1526 | static void |
1527 | __ctnetlink_change_status(struct nf_conn *ct, unsigned long on, | |
1528 | unsigned long off) | |
1529 | { | |
1530 | unsigned int bit; | |
1531 | ||
1532 | /* Ignore these unchangable bits */ | |
1533 | on &= ~IPS_UNCHANGEABLE_MASK; | |
1534 | off &= ~IPS_UNCHANGEABLE_MASK; | |
1535 | ||
1536 | for (bit = 0; bit < __IPS_MAX_BIT; bit++) { | |
1537 | if (on & (1 << bit)) | |
1538 | set_bit(bit, &ct->status); | |
1539 | else if (off & (1 << bit)) | |
1540 | clear_bit(bit, &ct->status); | |
1541 | } | |
1542 | } | |
1543 | ||
bb5cf80e | 1544 | static int |
39938324 | 1545 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
c1d10adb PNA |
1546 | { |
1547 | unsigned long d; | |
77236b6e | 1548 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
c1d10adb PNA |
1549 | d = ct->status ^ status; |
1550 | ||
1551 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) | |
1552 | /* unchangeable */ | |
0adf9d67 | 1553 | return -EBUSY; |
601e68e1 | 1554 | |
c1d10adb PNA |
1555 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
1556 | /* SEEN_REPLY bit can only be set */ | |
0adf9d67 | 1557 | return -EBUSY; |
601e68e1 | 1558 | |
c1d10adb PNA |
1559 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
1560 | /* ASSURED bit can only be set */ | |
0adf9d67 | 1561 | return -EBUSY; |
c1d10adb | 1562 | |
53b56da8 | 1563 | __ctnetlink_change_status(ct, status, 0); |
c1d10adb PNA |
1564 | return 0; |
1565 | } | |
1566 | ||
e6a7d3c0 | 1567 | static int |
0eba801b | 1568 | ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
e6a7d3c0 PNA |
1569 | { |
1570 | #ifdef CONFIG_NF_NAT_NEEDED | |
1571 | int ret; | |
1572 | ||
fe337ac2 FW |
1573 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
1574 | return 0; | |
1575 | ||
0eba801b PNA |
1576 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST, |
1577 | cda[CTA_NAT_DST]); | |
1578 | if (ret < 0) | |
1579 | return ret; | |
1580 | ||
c47d36b3 AS |
1581 | return ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC, |
1582 | cda[CTA_NAT_SRC]); | |
e6a7d3c0 | 1583 | #else |
0eba801b PNA |
1584 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
1585 | return 0; | |
e6a7d3c0 PNA |
1586 | return -EOPNOTSUPP; |
1587 | #endif | |
1588 | } | |
c1d10adb | 1589 | |
4054ff45 PNA |
1590 | static int ctnetlink_change_helper(struct nf_conn *ct, |
1591 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1592 | { |
1593 | struct nf_conntrack_helper *helper; | |
dc808fe2 | 1594 | struct nf_conn_help *help = nfct_help(ct); |
29fe1b48 | 1595 | char *helpname = NULL; |
ae243bee | 1596 | struct nlattr *helpinfo = NULL; |
c1d10adb PNA |
1597 | int err; |
1598 | ||
ae243bee | 1599 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
c1d10adb PNA |
1600 | if (err < 0) |
1601 | return err; | |
1602 | ||
f95d7a46 KC |
1603 | /* don't change helper of sibling connections */ |
1604 | if (ct->master) { | |
1605 | /* If we try to change the helper to the same thing twice, | |
1606 | * treat the second attempt as a no-op instead of returning | |
1607 | * an error. | |
1608 | */ | |
3173d5b8 LZ |
1609 | err = -EBUSY; |
1610 | if (help) { | |
1611 | rcu_read_lock(); | |
1612 | helper = rcu_dereference(help->helper); | |
1613 | if (helper && !strcmp(helper->name, helpname)) | |
1614 | err = 0; | |
1615 | rcu_read_unlock(); | |
1616 | } | |
1617 | ||
1618 | return err; | |
f95d7a46 KC |
1619 | } |
1620 | ||
df293bbb YK |
1621 | if (!strcmp(helpname, "")) { |
1622 | if (help && help->helper) { | |
c1d10adb PNA |
1623 | /* we had a helper before ... */ |
1624 | nf_ct_remove_expectations(ct); | |
a9b3cd7f | 1625 | RCU_INIT_POINTER(help->helper, NULL); |
c1d10adb | 1626 | } |
df293bbb YK |
1627 | |
1628 | return 0; | |
c1d10adb | 1629 | } |
601e68e1 | 1630 | |
88be4c09 | 1631 | rcu_read_lock(); |
794e6871 PM |
1632 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1633 | nf_ct_protonum(ct)); | |
226c0c0e | 1634 | if (helper == NULL) { |
88be4c09 | 1635 | rcu_read_unlock(); |
0adf9d67 | 1636 | return -EOPNOTSUPP; |
226c0c0e | 1637 | } |
df293bbb | 1638 | |
ceceae1b | 1639 | if (help) { |
ae243bee PNA |
1640 | if (help->helper == helper) { |
1641 | /* update private helper data if allowed. */ | |
7be54ca4 | 1642 | if (helper->from_nlattr) |
ae243bee | 1643 | helper->from_nlattr(helpinfo, ct); |
88be4c09 | 1644 | err = 0; |
fd7462de | 1645 | } else |
88be4c09 LZ |
1646 | err = -EBUSY; |
1647 | } else { | |
1648 | /* we cannot set a helper for an existing conntrack */ | |
1649 | err = -EOPNOTSUPP; | |
ceceae1b | 1650 | } |
df293bbb | 1651 | |
88be4c09 LZ |
1652 | rcu_read_unlock(); |
1653 | return err; | |
c1d10adb PNA |
1654 | } |
1655 | ||
4054ff45 PNA |
1656 | static int ctnetlink_change_timeout(struct nf_conn *ct, |
1657 | const struct nlattr * const cda[]) | |
c1d10adb | 1658 | { |
8b1836c4 | 1659 | u64 timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ; |
601e68e1 | 1660 | |
8b1836c4 JE |
1661 | if (timeout > INT_MAX) |
1662 | timeout = INT_MAX; | |
1663 | ct->timeout = nfct_time_stamp + (u32)timeout; | |
c1d10adb | 1664 | |
f330a7fd FW |
1665 | if (test_bit(IPS_DYING_BIT, &ct->status)) |
1666 | return -ETIME; | |
c1d10adb PNA |
1667 | |
1668 | return 0; | |
1669 | } | |
1670 | ||
d0b0268f PM |
1671 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
1672 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, | |
1673 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, | |
1674 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, | |
1675 | }; | |
1676 | ||
4054ff45 PNA |
1677 | static int ctnetlink_change_protoinfo(struct nf_conn *ct, |
1678 | const struct nlattr * const cda[]) | |
c1d10adb | 1679 | { |
39938324 | 1680 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
b3480fe0 | 1681 | const struct nf_conntrack_l4proto *l4proto; |
39938324 | 1682 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; |
c1d10adb PNA |
1683 | int err = 0; |
1684 | ||
fceb6435 JB |
1685 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy, |
1686 | NULL); | |
130ffbc2 DB |
1687 | if (err < 0) |
1688 | return err; | |
c1d10adb | 1689 | |
cd91566e FW |
1690 | rcu_read_lock(); |
1691 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); | |
fdf70832 PM |
1692 | if (l4proto->from_nlattr) |
1693 | err = l4proto->from_nlattr(tb, ct); | |
cd91566e | 1694 | rcu_read_unlock(); |
c1d10adb PNA |
1695 | |
1696 | return err; | |
1697 | } | |
1698 | ||
41d73ec0 PM |
1699 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
1700 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, | |
1701 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, | |
1702 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, | |
d0b0268f PM |
1703 | }; |
1704 | ||
4054ff45 PNA |
1705 | static int change_seq_adj(struct nf_ct_seqadj *seq, |
1706 | const struct nlattr * const attr) | |
13eae15a | 1707 | { |
130ffbc2 | 1708 | int err; |
41d73ec0 | 1709 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
13eae15a | 1710 | |
fceb6435 | 1711 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy, NULL); |
130ffbc2 DB |
1712 | if (err < 0) |
1713 | return err; | |
13eae15a | 1714 | |
41d73ec0 | 1715 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
13eae15a PNA |
1716 | return -EINVAL; |
1717 | ||
41d73ec0 PM |
1718 | seq->correction_pos = |
1719 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); | |
13eae15a | 1720 | |
41d73ec0 | 1721 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
13eae15a PNA |
1722 | return -EINVAL; |
1723 | ||
41d73ec0 PM |
1724 | seq->offset_before = |
1725 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); | |
13eae15a | 1726 | |
41d73ec0 | 1727 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
13eae15a PNA |
1728 | return -EINVAL; |
1729 | ||
41d73ec0 PM |
1730 | seq->offset_after = |
1731 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); | |
13eae15a PNA |
1732 | |
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | static int | |
41d73ec0 PM |
1737 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
1738 | const struct nlattr * const cda[]) | |
13eae15a | 1739 | { |
41d73ec0 | 1740 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
13eae15a | 1741 | int ret = 0; |
13eae15a | 1742 | |
41d73ec0 | 1743 | if (!seqadj) |
13eae15a PNA |
1744 | return 0; |
1745 | ||
64f3967c | 1746 | spin_lock_bh(&ct->lock); |
41d73ec0 PM |
1747 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
1748 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], | |
1749 | cda[CTA_SEQ_ADJ_ORIG]); | |
13eae15a | 1750 | if (ret < 0) |
64f3967c | 1751 | goto err; |
13eae15a | 1752 | |
53b56da8 | 1753 | set_bit(IPS_SEQ_ADJUST_BIT, &ct->status); |
13eae15a PNA |
1754 | } |
1755 | ||
41d73ec0 PM |
1756 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
1757 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], | |
1758 | cda[CTA_SEQ_ADJ_REPLY]); | |
13eae15a | 1759 | if (ret < 0) |
64f3967c | 1760 | goto err; |
13eae15a | 1761 | |
53b56da8 | 1762 | set_bit(IPS_SEQ_ADJUST_BIT, &ct->status); |
13eae15a PNA |
1763 | } |
1764 | ||
64f3967c | 1765 | spin_unlock_bh(&ct->lock); |
13eae15a | 1766 | return 0; |
64f3967c LZ |
1767 | err: |
1768 | spin_unlock_bh(&ct->lock); | |
1769 | return ret; | |
13eae15a | 1770 | } |
13eae15a | 1771 | |
20710b3b PNA |
1772 | static const struct nla_policy synproxy_policy[CTA_SYNPROXY_MAX + 1] = { |
1773 | [CTA_SYNPROXY_ISN] = { .type = NLA_U32 }, | |
1774 | [CTA_SYNPROXY_ITS] = { .type = NLA_U32 }, | |
1775 | [CTA_SYNPROXY_TSOFF] = { .type = NLA_U32 }, | |
1776 | }; | |
1777 | ||
1778 | static int ctnetlink_change_synproxy(struct nf_conn *ct, | |
1779 | const struct nlattr * const cda[]) | |
1780 | { | |
1781 | struct nf_conn_synproxy *synproxy = nfct_synproxy(ct); | |
1782 | struct nlattr *tb[CTA_SYNPROXY_MAX + 1]; | |
1783 | int err; | |
1784 | ||
1785 | if (!synproxy) | |
1786 | return 0; | |
1787 | ||
1788 | err = nla_parse_nested(tb, CTA_SYNPROXY_MAX, cda[CTA_SYNPROXY], | |
1789 | synproxy_policy, NULL); | |
1790 | if (err < 0) | |
1791 | return err; | |
1792 | ||
1793 | if (!tb[CTA_SYNPROXY_ISN] || | |
1794 | !tb[CTA_SYNPROXY_ITS] || | |
1795 | !tb[CTA_SYNPROXY_TSOFF]) | |
1796 | return -EINVAL; | |
1797 | ||
1798 | synproxy->isn = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ISN])); | |
1799 | synproxy->its = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ITS])); | |
1800 | synproxy->tsoff = ntohl(nla_get_be32(tb[CTA_SYNPROXY_TSOFF])); | |
1801 | ||
1802 | return 0; | |
1803 | } | |
1804 | ||
9b21f6a9 FW |
1805 | static int |
1806 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) | |
1807 | { | |
1808 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
1809 | size_t len = nla_len(cda[CTA_LABELS]); | |
1810 | const void *mask = cda[CTA_LABELS_MASK]; | |
1811 | ||
1812 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ | |
1813 | return -EINVAL; | |
1814 | ||
1815 | if (mask) { | |
1816 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || | |
1817 | nla_len(cda[CTA_LABELS_MASK]) != len) | |
1818 | return -EINVAL; | |
1819 | mask = nla_data(cda[CTA_LABELS_MASK]); | |
1820 | } | |
1821 | ||
1822 | len /= sizeof(u32); | |
1823 | ||
1824 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); | |
1825 | #else | |
1826 | return -EOPNOTSUPP; | |
1827 | #endif | |
1828 | } | |
1829 | ||
c1d10adb | 1830 | static int |
39938324 PM |
1831 | ctnetlink_change_conntrack(struct nf_conn *ct, |
1832 | const struct nlattr * const cda[]) | |
c1d10adb PNA |
1833 | { |
1834 | int err; | |
1835 | ||
e098360f PNA |
1836 | /* only allow NAT changes and master assignation for new conntracks */ |
1837 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) | |
1838 | return -EOPNOTSUPP; | |
1839 | ||
df6fb868 | 1840 | if (cda[CTA_HELP]) { |
c1d10adb PNA |
1841 | err = ctnetlink_change_helper(ct, cda); |
1842 | if (err < 0) | |
1843 | return err; | |
1844 | } | |
1845 | ||
df6fb868 | 1846 | if (cda[CTA_TIMEOUT]) { |
c1d10adb PNA |
1847 | err = ctnetlink_change_timeout(ct, cda); |
1848 | if (err < 0) | |
1849 | return err; | |
1850 | } | |
1851 | ||
df6fb868 | 1852 | if (cda[CTA_STATUS]) { |
c1d10adb PNA |
1853 | err = ctnetlink_change_status(ct, cda); |
1854 | if (err < 0) | |
1855 | return err; | |
1856 | } | |
1857 | ||
df6fb868 | 1858 | if (cda[CTA_PROTOINFO]) { |
c1d10adb PNA |
1859 | err = ctnetlink_change_protoinfo(ct, cda); |
1860 | if (err < 0) | |
1861 | return err; | |
1862 | } | |
1863 | ||
bcd1e830 | 1864 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 1865 | if (cda[CTA_MARK]) |
77236b6e | 1866 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
1867 | #endif |
1868 | ||
41d73ec0 PM |
1869 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1870 | err = ctnetlink_change_seq_adj(ct, cda); | |
13eae15a PNA |
1871 | if (err < 0) |
1872 | return err; | |
1873 | } | |
41d73ec0 | 1874 | |
20710b3b PNA |
1875 | if (cda[CTA_SYNPROXY]) { |
1876 | err = ctnetlink_change_synproxy(ct, cda); | |
1877 | if (err < 0) | |
1878 | return err; | |
1879 | } | |
1880 | ||
9b21f6a9 FW |
1881 | if (cda[CTA_LABELS]) { |
1882 | err = ctnetlink_attach_labels(ct, cda); | |
1883 | if (err < 0) | |
1884 | return err; | |
1885 | } | |
13eae15a | 1886 | |
c1d10adb PNA |
1887 | return 0; |
1888 | } | |
1889 | ||
f0a3c086 | 1890 | static struct nf_conn * |
308ac914 DB |
1891 | ctnetlink_create_conntrack(struct net *net, |
1892 | const struct nf_conntrack_zone *zone, | |
9592a5c0 | 1893 | const struct nlattr * const cda[], |
c1d10adb | 1894 | struct nf_conntrack_tuple *otuple, |
5faa1f4c | 1895 | struct nf_conntrack_tuple *rtuple, |
7ec47496 | 1896 | u8 u3) |
c1d10adb PNA |
1897 | { |
1898 | struct nf_conn *ct; | |
1899 | int err = -EINVAL; | |
ceceae1b | 1900 | struct nf_conntrack_helper *helper; |
315c34da | 1901 | struct nf_conn_tstamp *tstamp; |
8b1836c4 | 1902 | u64 timeout; |
c1d10adb | 1903 | |
ef00f89f | 1904 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
cd7fcbf1 | 1905 | if (IS_ERR(ct)) |
f0a3c086 | 1906 | return ERR_PTR(-ENOMEM); |
c1d10adb | 1907 | |
df6fb868 | 1908 | if (!cda[CTA_TIMEOUT]) |
0f5b3e85 | 1909 | goto err1; |
c1d10adb | 1910 | |
8b1836c4 JE |
1911 | timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ; |
1912 | if (timeout > INT_MAX) | |
1913 | timeout = INT_MAX; | |
1914 | ct->timeout = (u32)timeout + nfct_time_stamp; | |
c1d10adb | 1915 | |
1575e7ea | 1916 | rcu_read_lock(); |
226c0c0e | 1917 | if (cda[CTA_HELP]) { |
29fe1b48 | 1918 | char *helpname = NULL; |
ae243bee PNA |
1919 | struct nlattr *helpinfo = NULL; |
1920 | ||
1921 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); | |
0f5b3e85 PM |
1922 | if (err < 0) |
1923 | goto err2; | |
226c0c0e | 1924 | |
794e6871 PM |
1925 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
1926 | nf_ct_protonum(ct)); | |
226c0c0e PNA |
1927 | if (helper == NULL) { |
1928 | rcu_read_unlock(); | |
1929 | #ifdef CONFIG_MODULES | |
1930 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
1931 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1932 | goto err1; |
226c0c0e PNA |
1933 | } |
1934 | ||
1935 | rcu_read_lock(); | |
794e6871 PM |
1936 | helper = __nf_conntrack_helper_find(helpname, |
1937 | nf_ct_l3num(ct), | |
1938 | nf_ct_protonum(ct)); | |
226c0c0e | 1939 | if (helper) { |
226c0c0e | 1940 | err = -EAGAIN; |
0f5b3e85 | 1941 | goto err2; |
226c0c0e PNA |
1942 | } |
1943 | rcu_read_unlock(); | |
1944 | #endif | |
1945 | err = -EOPNOTSUPP; | |
0f5b3e85 | 1946 | goto err1; |
226c0c0e PNA |
1947 | } else { |
1948 | struct nf_conn_help *help; | |
1949 | ||
1afc5679 | 1950 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
226c0c0e | 1951 | if (help == NULL) { |
226c0c0e | 1952 | err = -ENOMEM; |
0f5b3e85 | 1953 | goto err2; |
226c0c0e | 1954 | } |
ae243bee | 1955 | /* set private helper data if allowed. */ |
7be54ca4 | 1956 | if (helper->from_nlattr) |
ae243bee | 1957 | helper->from_nlattr(helpinfo, ct); |
226c0c0e PNA |
1958 | |
1959 | /* not in hash table yet so not strictly necessary */ | |
a9b3cd7f | 1960 | RCU_INIT_POINTER(help->helper, helper); |
226c0c0e PNA |
1961 | } |
1962 | } else { | |
1963 | /* try an implicit helper assignation */ | |
b2a15a60 | 1964 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
0f5b3e85 PM |
1965 | if (err < 0) |
1966 | goto err2; | |
1575e7ea PNA |
1967 | } |
1968 | ||
0eba801b PNA |
1969 | err = ctnetlink_setup_nat(ct, cda); |
1970 | if (err < 0) | |
1971 | goto err2; | |
e6a7d3c0 | 1972 | |
a88e22ad | 1973 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
a992ca2a | 1974 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
a88e22ad | 1975 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
c539f017 | 1976 | nf_ct_labels_ext_add(ct); |
87e94dbc EL |
1977 | nfct_seqadj_ext_add(ct); |
1978 | nfct_synproxy_ext_add(ct); | |
c539f017 | 1979 | |
a88e22ad PNA |
1980 | /* we must add conntrack extensions before confirmation. */ |
1981 | ct->status |= IPS_CONFIRMED; | |
1982 | ||
1983 | if (cda[CTA_STATUS]) { | |
1984 | err = ctnetlink_change_status(ct, cda); | |
0f5b3e85 PM |
1985 | if (err < 0) |
1986 | goto err2; | |
bbb3357d | 1987 | } |
c1d10adb | 1988 | |
41d73ec0 PM |
1989 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
1990 | err = ctnetlink_change_seq_adj(ct, cda); | |
0f5b3e85 PM |
1991 | if (err < 0) |
1992 | goto err2; | |
c969aa7d | 1993 | } |
c969aa7d | 1994 | |
e5fc9e7a | 1995 | memset(&ct->proto, 0, sizeof(ct->proto)); |
df6fb868 | 1996 | if (cda[CTA_PROTOINFO]) { |
c1d10adb | 1997 | err = ctnetlink_change_protoinfo(ct, cda); |
0f5b3e85 PM |
1998 | if (err < 0) |
1999 | goto err2; | |
c1d10adb PNA |
2000 | } |
2001 | ||
20710b3b PNA |
2002 | if (cda[CTA_SYNPROXY]) { |
2003 | err = ctnetlink_change_synproxy(ct, cda); | |
2004 | if (err < 0) | |
2005 | goto err2; | |
2006 | } | |
2007 | ||
bcd1e830 | 2008 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
df6fb868 | 2009 | if (cda[CTA_MARK]) |
77236b6e | 2010 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
c1d10adb PNA |
2011 | #endif |
2012 | ||
5faa1f4c | 2013 | /* setup master conntrack: this is a confirmed expectation */ |
7ec47496 PNA |
2014 | if (cda[CTA_TUPLE_MASTER]) { |
2015 | struct nf_conntrack_tuple master; | |
2016 | struct nf_conntrack_tuple_hash *master_h; | |
2017 | struct nf_conn *master_ct; | |
2018 | ||
deedb590 DB |
2019 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, |
2020 | u3, NULL); | |
7ec47496 | 2021 | if (err < 0) |
0f5b3e85 | 2022 | goto err2; |
7ec47496 | 2023 | |
ef00f89f | 2024 | master_h = nf_conntrack_find_get(net, zone, &master); |
7ec47496 PNA |
2025 | if (master_h == NULL) { |
2026 | err = -ENOENT; | |
0f5b3e85 | 2027 | goto err2; |
7ec47496 PNA |
2028 | } |
2029 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); | |
f2a89004 | 2030 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
5faa1f4c | 2031 | ct->master = master_ct; |
f2a89004 | 2032 | } |
315c34da PNA |
2033 | tstamp = nf_conn_tstamp_find(ct); |
2034 | if (tstamp) | |
d2de875c | 2035 | tstamp->start = ktime_get_real_ns(); |
5faa1f4c | 2036 | |
7d367e06 JK |
2037 | err = nf_conntrack_hash_check_insert(ct); |
2038 | if (err < 0) | |
2039 | goto err2; | |
2040 | ||
58a3c9bb | 2041 | rcu_read_unlock(); |
dafc741c | 2042 | |
f0a3c086 | 2043 | return ct; |
c1d10adb | 2044 | |
0f5b3e85 PM |
2045 | err2: |
2046 | rcu_read_unlock(); | |
2047 | err1: | |
c1d10adb | 2048 | nf_conntrack_free(ct); |
f0a3c086 | 2049 | return ERR_PTR(err); |
c1d10adb PNA |
2050 | } |
2051 | ||
7b8002a1 PNA |
2052 | static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl, |
2053 | struct sk_buff *skb, | |
2054 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
2055 | const struct nlattr * const cda[], |
2056 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
2057 | { |
2058 | struct nf_conntrack_tuple otuple, rtuple; | |
2059 | struct nf_conntrack_tuple_hash *h = NULL; | |
96bcf938 | 2060 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
7d367e06 | 2061 | struct nf_conn *ct; |
c1d10adb | 2062 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 2063 | struct nf_conntrack_zone zone; |
ef00f89f PM |
2064 | int err; |
2065 | ||
2066 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); | |
2067 | if (err < 0) | |
2068 | return err; | |
c1d10adb | 2069 | |
df6fb868 | 2070 | if (cda[CTA_TUPLE_ORIG]) { |
deedb590 DB |
2071 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, |
2072 | u3, &zone); | |
c1d10adb PNA |
2073 | if (err < 0) |
2074 | return err; | |
2075 | } | |
2076 | ||
df6fb868 | 2077 | if (cda[CTA_TUPLE_REPLY]) { |
deedb590 DB |
2078 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, |
2079 | u3, &zone); | |
c1d10adb PNA |
2080 | if (err < 0) |
2081 | return err; | |
2082 | } | |
2083 | ||
df6fb868 | 2084 | if (cda[CTA_TUPLE_ORIG]) |
308ac914 | 2085 | h = nf_conntrack_find_get(net, &zone, &otuple); |
df6fb868 | 2086 | else if (cda[CTA_TUPLE_REPLY]) |
308ac914 | 2087 | h = nf_conntrack_find_get(net, &zone, &rtuple); |
c1d10adb PNA |
2088 | |
2089 | if (h == NULL) { | |
c1d10adb | 2090 | err = -ENOENT; |
f0a3c086 | 2091 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
fecc1133 | 2092 | enum ip_conntrack_events events; |
5faa1f4c | 2093 | |
442fad94 FW |
2094 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
2095 | return -EINVAL; | |
aa0c2c68 LZ |
2096 | if (otuple.dst.protonum != rtuple.dst.protonum) |
2097 | return -EINVAL; | |
442fad94 | 2098 | |
308ac914 | 2099 | ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple, |
f0a3c086 | 2100 | &rtuple, u3); |
7d367e06 JK |
2101 | if (IS_ERR(ct)) |
2102 | return PTR_ERR(ct); | |
2103 | ||
f0a3c086 | 2104 | err = 0; |
fecc1133 | 2105 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
97aae0df | 2106 | events = 1 << IPCT_RELATED; |
fecc1133 | 2107 | else |
97aae0df | 2108 | events = 1 << IPCT_NEW; |
fecc1133 | 2109 | |
9b21f6a9 FW |
2110 | if (cda[CTA_LABELS] && |
2111 | ctnetlink_attach_labels(ct, cda) == 0) | |
2112 | events |= (1 << IPCT_LABEL); | |
2113 | ||
858b3133 PM |
2114 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
2115 | (1 << IPCT_ASSURED) | | |
a0891aa6 PNA |
2116 | (1 << IPCT_HELPER) | |
2117 | (1 << IPCT_PROTOINFO) | | |
41d73ec0 | 2118 | (1 << IPCT_SEQADJ) | |
20710b3b PNA |
2119 | (1 << IPCT_MARK) | |
2120 | (1 << IPCT_SYNPROXY) | | |
2121 | events, | |
15e47304 | 2122 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 2123 | nlmsg_report(nlh)); |
f0a3c086 | 2124 | nf_ct_put(ct); |
7d367e06 | 2125 | } |
5faa1f4c | 2126 | |
c1d10adb PNA |
2127 | return err; |
2128 | } | |
2129 | /* implicit 'else' */ | |
2130 | ||
c1d10adb | 2131 | err = -EEXIST; |
7d367e06 | 2132 | ct = nf_ct_tuplehash_to_ctrack(h); |
ff4ca827 | 2133 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
19abb7b0 PNA |
2134 | err = ctnetlink_change_conntrack(ct, cda); |
2135 | if (err == 0) { | |
858b3133 PM |
2136 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
2137 | (1 << IPCT_ASSURED) | | |
a0891aa6 | 2138 | (1 << IPCT_HELPER) | |
797a7d66 | 2139 | (1 << IPCT_LABEL) | |
a0891aa6 | 2140 | (1 << IPCT_PROTOINFO) | |
41d73ec0 | 2141 | (1 << IPCT_SEQADJ) | |
20710b3b PNA |
2142 | (1 << IPCT_MARK) | |
2143 | (1 << IPCT_SYNPROXY), | |
15e47304 | 2144 | ct, NETLINK_CB(skb).portid, |
a0891aa6 | 2145 | nlmsg_report(nlh)); |
7d367e06 | 2146 | } |
ff4ca827 | 2147 | } |
c1d10adb | 2148 | |
7d367e06 | 2149 | nf_ct_put(ct); |
c1d10adb PNA |
2150 | return err; |
2151 | } | |
2152 | ||
392025f8 | 2153 | static int |
15e47304 | 2154 | ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
392025f8 PNA |
2155 | __u16 cpu, const struct ip_conntrack_stat *st) |
2156 | { | |
2157 | struct nlmsghdr *nlh; | |
2158 | struct nfgenmsg *nfmsg; | |
15e47304 | 2159 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 | 2160 | |
dedb67c4 PNA |
2161 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, |
2162 | IPCTNL_MSG_CT_GET_STATS_CPU); | |
15e47304 | 2163 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
2164 | if (nlh == NULL) |
2165 | goto nlmsg_failure; | |
2166 | ||
2167 | nfmsg = nlmsg_data(nlh); | |
2168 | nfmsg->nfgen_family = AF_UNSPEC; | |
2169 | nfmsg->version = NFNETLINK_V0; | |
2170 | nfmsg->res_id = htons(cpu); | |
2171 | ||
8e8118f8 | 2172 | if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || |
392025f8 PNA |
2173 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || |
2174 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || | |
392025f8 PNA |
2175 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || |
2176 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, | |
2177 | htonl(st->insert_failed)) || | |
2178 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || | |
2179 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || | |
2180 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || | |
2181 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, | |
2182 | htonl(st->search_restart))) | |
2183 | goto nla_put_failure; | |
2184 | ||
2185 | nlmsg_end(skb, nlh); | |
2186 | return skb->len; | |
2187 | ||
2188 | nla_put_failure: | |
2189 | nlmsg_failure: | |
2190 | nlmsg_cancel(skb, nlh); | |
2191 | return -1; | |
2192 | } | |
2193 | ||
2194 | static int | |
2195 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2196 | { | |
2197 | int cpu; | |
2198 | struct net *net = sock_net(skb->sk); | |
2199 | ||
2200 | if (cb->args[0] == nr_cpu_ids) | |
2201 | return 0; | |
2202 | ||
2203 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
2204 | const struct ip_conntrack_stat *st; | |
2205 | ||
2206 | if (!cpu_possible(cpu)) | |
2207 | continue; | |
2208 | ||
2209 | st = per_cpu_ptr(net->ct.stat, cpu); | |
2210 | if (ctnetlink_ct_stat_cpu_fill_info(skb, | |
15e47304 | 2211 | NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
2212 | cb->nlh->nlmsg_seq, |
2213 | cpu, st) < 0) | |
2214 | break; | |
2215 | } | |
2216 | cb->args[0] = cpu; | |
2217 | ||
2218 | return skb->len; | |
2219 | } | |
2220 | ||
7b8002a1 PNA |
2221 | static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl, |
2222 | struct sk_buff *skb, | |
2223 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
2224 | const struct nlattr * const cda[], |
2225 | struct netlink_ext_ack *extack) | |
392025f8 PNA |
2226 | { |
2227 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
2228 | struct netlink_dump_control c = { | |
2229 | .dump = ctnetlink_ct_stat_cpu_dump, | |
2230 | }; | |
2231 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2232 | } | |
2233 | ||
2234 | return 0; | |
2235 | } | |
2236 | ||
2237 | static int | |
15e47304 | 2238 | ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
392025f8 PNA |
2239 | struct net *net) |
2240 | { | |
2241 | struct nlmsghdr *nlh; | |
2242 | struct nfgenmsg *nfmsg; | |
15e47304 | 2243 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 PNA |
2244 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
2245 | ||
dedb67c4 | 2246 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS); |
15e47304 | 2247 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
2248 | if (nlh == NULL) |
2249 | goto nlmsg_failure; | |
2250 | ||
2251 | nfmsg = nlmsg_data(nlh); | |
2252 | nfmsg->nfgen_family = AF_UNSPEC; | |
2253 | nfmsg->version = NFNETLINK_V0; | |
2254 | nfmsg->res_id = 0; | |
2255 | ||
2256 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) | |
2257 | goto nla_put_failure; | |
2258 | ||
538c5672 FF |
2259 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_MAX_ENTRIES, htonl(nf_conntrack_max))) |
2260 | goto nla_put_failure; | |
2261 | ||
392025f8 PNA |
2262 | nlmsg_end(skb, nlh); |
2263 | return skb->len; | |
2264 | ||
2265 | nla_put_failure: | |
2266 | nlmsg_failure: | |
2267 | nlmsg_cancel(skb, nlh); | |
2268 | return -1; | |
2269 | } | |
2270 | ||
7b8002a1 PNA |
2271 | static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl, |
2272 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2273 | const struct nlattr * const cda[], |
2274 | struct netlink_ext_ack *extack) | |
392025f8 PNA |
2275 | { |
2276 | struct sk_buff *skb2; | |
2277 | int err; | |
2278 | ||
2279 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2280 | if (skb2 == NULL) | |
2281 | return -ENOMEM; | |
2282 | ||
15e47304 | 2283 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
392025f8 PNA |
2284 | nlh->nlmsg_seq, |
2285 | NFNL_MSG_TYPE(nlh->nlmsg_type), | |
2286 | sock_net(skb->sk)); | |
2287 | if (err <= 0) | |
2288 | goto free; | |
2289 | ||
15e47304 | 2290 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
392025f8 PNA |
2291 | if (err < 0) |
2292 | goto out; | |
2293 | ||
2294 | return 0; | |
2295 | ||
2296 | free: | |
2297 | kfree_skb(skb2); | |
2298 | out: | |
2299 | /* this avoids a loop in nfnetlink. */ | |
2300 | return err == -EAGAIN ? -ENOBUFS : err; | |
2301 | } | |
2302 | ||
bd077937 PNA |
2303 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
2304 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, | |
2305 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, | |
2306 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, | |
2307 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, | |
2308 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, | |
2309 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, | |
2310 | .len = NF_CT_HELPER_NAME_LEN - 1 }, | |
2311 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, | |
2312 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, | |
2313 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, | |
2314 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, | |
2315 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, | |
2316 | }; | |
2317 | ||
2318 | static struct nf_conntrack_expect * | |
2319 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, | |
2320 | struct nf_conntrack_helper *helper, | |
2321 | struct nf_conntrack_tuple *tuple, | |
2322 | struct nf_conntrack_tuple *mask); | |
2323 | ||
83f3e94d | 2324 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
9cb01766 | 2325 | static size_t |
a4b4766c | 2326 | ctnetlink_glue_build_size(const struct nf_conn *ct) |
9cb01766 PNA |
2327 | { |
2328 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ | |
2329 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ | |
2330 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ | |
2331 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ | |
2332 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ | |
2333 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ | |
2334 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ | |
2335 | + nla_total_size(0) /* CTA_PROTOINFO */ | |
2336 | + nla_total_size(0) /* CTA_HELP */ | |
2337 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ | |
2338 | + ctnetlink_secctx_size(ct) | |
2339 | #ifdef CONFIG_NF_NAT_NEEDED | |
2340 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ | |
2341 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ | |
2342 | #endif | |
2343 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
2344 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ | |
4a001068 KM |
2345 | #endif |
2346 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
deedb590 | 2347 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
9cb01766 PNA |
2348 | #endif |
2349 | + ctnetlink_proto_size(ct) | |
2350 | ; | |
2351 | } | |
2352 | ||
224a0597 | 2353 | static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb, |
a4b4766c | 2354 | enum ip_conntrack_info *ctinfo) |
b7bd1809 | 2355 | { |
ab8bc7ed | 2356 | return nf_ct_get(skb, ctinfo); |
b7bd1809 PNA |
2357 | } |
2358 | ||
a4b4766c | 2359 | static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct) |
9cb01766 | 2360 | { |
308ac914 | 2361 | const struct nf_conntrack_zone *zone; |
9cb01766 PNA |
2362 | struct nlattr *nest_parms; |
2363 | ||
deedb590 DB |
2364 | zone = nf_ct_zone(ct); |
2365 | ||
9cb01766 PNA |
2366 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
2367 | if (!nest_parms) | |
2368 | goto nla_put_failure; | |
2369 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) | |
2370 | goto nla_put_failure; | |
deedb590 DB |
2371 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
2372 | NF_CT_ZONE_DIR_ORIG) < 0) | |
2373 | goto nla_put_failure; | |
9cb01766 PNA |
2374 | nla_nest_end(skb, nest_parms); |
2375 | ||
2376 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); | |
2377 | if (!nest_parms) | |
2378 | goto nla_put_failure; | |
2379 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) | |
2380 | goto nla_put_failure; | |
deedb590 DB |
2381 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
2382 | NF_CT_ZONE_DIR_REPL) < 0) | |
2383 | goto nla_put_failure; | |
9cb01766 PNA |
2384 | nla_nest_end(skb, nest_parms); |
2385 | ||
deedb590 DB |
2386 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
2387 | NF_CT_DEFAULT_ZONE_DIR) < 0) | |
308ac914 | 2388 | goto nla_put_failure; |
9cb01766 PNA |
2389 | |
2390 | if (ctnetlink_dump_id(skb, ct) < 0) | |
2391 | goto nla_put_failure; | |
2392 | ||
2393 | if (ctnetlink_dump_status(skb, ct) < 0) | |
2394 | goto nla_put_failure; | |
2395 | ||
2396 | if (ctnetlink_dump_timeout(skb, ct) < 0) | |
2397 | goto nla_put_failure; | |
2398 | ||
2399 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) | |
2400 | goto nla_put_failure; | |
2401 | ||
2402 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) | |
2403 | goto nla_put_failure; | |
2404 | ||
2405 | #ifdef CONFIG_NF_CONNTRACK_SECMARK | |
2406 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) | |
2407 | goto nla_put_failure; | |
2408 | #endif | |
2409 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) | |
2410 | goto nla_put_failure; | |
2411 | ||
2412 | if ((ct->status & IPS_SEQ_ADJUST) && | |
41d73ec0 | 2413 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
9cb01766 PNA |
2414 | goto nla_put_failure; |
2415 | ||
20710b3b PNA |
2416 | if (ctnetlink_dump_ct_synproxy(skb, ct) < 0) |
2417 | goto nla_put_failure; | |
2418 | ||
9cb01766 PNA |
2419 | #ifdef CONFIG_NF_CONNTRACK_MARK |
2420 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) | |
2421 | goto nla_put_failure; | |
2422 | #endif | |
0ceabd83 FW |
2423 | if (ctnetlink_dump_labels(skb, ct) < 0) |
2424 | goto nla_put_failure; | |
9cb01766 PNA |
2425 | return 0; |
2426 | ||
2427 | nla_put_failure: | |
9cb01766 PNA |
2428 | return -ENOSPC; |
2429 | } | |
2430 | ||
b7bd1809 | 2431 | static int |
a4b4766c KM |
2432 | ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct, |
2433 | enum ip_conntrack_info ctinfo, | |
2434 | u_int16_t ct_attr, u_int16_t ct_info_attr) | |
b7bd1809 PNA |
2435 | { |
2436 | struct nlattr *nest_parms; | |
2437 | ||
2438 | nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED); | |
2439 | if (!nest_parms) | |
2440 | goto nla_put_failure; | |
2441 | ||
a4b4766c | 2442 | if (__ctnetlink_glue_build(skb, ct) < 0) |
b7bd1809 PNA |
2443 | goto nla_put_failure; |
2444 | ||
2445 | nla_nest_end(skb, nest_parms); | |
2446 | ||
2447 | if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo))) | |
2448 | goto nla_put_failure; | |
2449 | ||
2450 | return 0; | |
2451 | ||
2452 | nla_put_failure: | |
2453 | return -ENOSPC; | |
2454 | } | |
2455 | ||
a963d710 KC |
2456 | static int |
2457 | ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[]) | |
2458 | { | |
2459 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); | |
2460 | unsigned long d = ct->status ^ status; | |
2461 | ||
2462 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) | |
2463 | /* SEEN_REPLY bit can only be set */ | |
2464 | return -EBUSY; | |
2465 | ||
2466 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) | |
2467 | /* ASSURED bit can only be set */ | |
2468 | return -EBUSY; | |
2469 | ||
2470 | /* This check is less strict than ctnetlink_change_status() | |
2471 | * because callers often flip IPS_EXPECTED bits when sending | |
2472 | * an NFQA_CT attribute to the kernel. So ignore the | |
53b56da8 LZ |
2473 | * unchangeable bits but do not error out. Also user programs |
2474 | * are allowed to clear the bits that they are allowed to change. | |
a963d710 | 2475 | */ |
53b56da8 | 2476 | __ctnetlink_change_status(ct, status, ~status); |
a963d710 KC |
2477 | return 0; |
2478 | } | |
2479 | ||
9cb01766 | 2480 | static int |
a4b4766c | 2481 | ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) |
9cb01766 PNA |
2482 | { |
2483 | int err; | |
2484 | ||
2485 | if (cda[CTA_TIMEOUT]) { | |
2486 | err = ctnetlink_change_timeout(ct, cda); | |
2487 | if (err < 0) | |
2488 | return err; | |
2489 | } | |
2490 | if (cda[CTA_STATUS]) { | |
a963d710 | 2491 | err = ctnetlink_update_status(ct, cda); |
9cb01766 PNA |
2492 | if (err < 0) |
2493 | return err; | |
2494 | } | |
2495 | if (cda[CTA_HELP]) { | |
2496 | err = ctnetlink_change_helper(ct, cda); | |
2497 | if (err < 0) | |
2498 | return err; | |
2499 | } | |
9b21f6a9 FW |
2500 | if (cda[CTA_LABELS]) { |
2501 | err = ctnetlink_attach_labels(ct, cda); | |
2502 | if (err < 0) | |
2503 | return err; | |
2504 | } | |
9cb01766 | 2505 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
534473c6 FW |
2506 | if (cda[CTA_MARK]) { |
2507 | u32 mask = 0, mark, newmark; | |
2508 | if (cda[CTA_MARK_MASK]) | |
2509 | mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK])); | |
2510 | ||
2511 | mark = ntohl(nla_get_be32(cda[CTA_MARK])); | |
2512 | newmark = (ct->mark & mask) ^ mark; | |
2513 | if (newmark != ct->mark) | |
2514 | ct->mark = newmark; | |
2515 | } | |
9cb01766 PNA |
2516 | #endif |
2517 | return 0; | |
2518 | } | |
2519 | ||
2520 | static int | |
a4b4766c | 2521 | ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct) |
9cb01766 PNA |
2522 | { |
2523 | struct nlattr *cda[CTA_MAX+1]; | |
68e035c9 | 2524 | int ret; |
9cb01766 | 2525 | |
fceb6435 | 2526 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy, NULL); |
130ffbc2 DB |
2527 | if (ret < 0) |
2528 | return ret; | |
9cb01766 | 2529 | |
88be4c09 | 2530 | return ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct); |
9cb01766 PNA |
2531 | } |
2532 | ||
a4b4766c KM |
2533 | static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda, |
2534 | const struct nf_conn *ct, | |
2535 | struct nf_conntrack_tuple *tuple, | |
2536 | struct nf_conntrack_tuple *mask) | |
bd077937 PNA |
2537 | { |
2538 | int err; | |
2539 | ||
2540 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, | |
deedb590 | 2541 | nf_ct_l3num(ct), NULL); |
bd077937 PNA |
2542 | if (err < 0) |
2543 | return err; | |
2544 | ||
2545 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, | |
deedb590 | 2546 | nf_ct_l3num(ct), NULL); |
bd077937 PNA |
2547 | } |
2548 | ||
2549 | static int | |
a4b4766c KM |
2550 | ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, |
2551 | u32 portid, u32 report) | |
bd077937 PNA |
2552 | { |
2553 | struct nlattr *cda[CTA_EXPECT_MAX+1]; | |
2554 | struct nf_conntrack_tuple tuple, mask; | |
b7e092c0 | 2555 | struct nf_conntrack_helper *helper = NULL; |
bd077937 PNA |
2556 | struct nf_conntrack_expect *exp; |
2557 | int err; | |
2558 | ||
fceb6435 JB |
2559 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy, |
2560 | NULL); | |
bd077937 PNA |
2561 | if (err < 0) |
2562 | return err; | |
2563 | ||
a4b4766c KM |
2564 | err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda, |
2565 | ct, &tuple, &mask); | |
bd077937 PNA |
2566 | if (err < 0) |
2567 | return err; | |
2568 | ||
2569 | if (cda[CTA_EXPECT_HELP_NAME]) { | |
2570 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
2571 | ||
2572 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), | |
2573 | nf_ct_protonum(ct)); | |
2574 | if (helper == NULL) | |
2575 | return -EOPNOTSUPP; | |
2576 | } | |
2577 | ||
2578 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, | |
2579 | helper, &tuple, &mask); | |
2580 | if (IS_ERR(exp)) | |
2581 | return PTR_ERR(exp); | |
2582 | ||
2583 | err = nf_ct_expect_related_report(exp, portid, report); | |
b18bcb00 LZ |
2584 | nf_ct_expect_put(exp); |
2585 | return err; | |
bd077937 PNA |
2586 | } |
2587 | ||
a4b4766c KM |
2588 | static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct, |
2589 | enum ip_conntrack_info ctinfo, int diff) | |
b7bd1809 PNA |
2590 | { |
2591 | if (!(ct->status & IPS_NAT_MASK)) | |
2592 | return; | |
2593 | ||
2594 | nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff); | |
2595 | } | |
2596 | ||
a4b4766c KM |
2597 | static struct nfnl_ct_hook ctnetlink_glue_hook = { |
2598 | .get_ct = ctnetlink_glue_get_ct, | |
2599 | .build_size = ctnetlink_glue_build_size, | |
2600 | .build = ctnetlink_glue_build, | |
2601 | .parse = ctnetlink_glue_parse, | |
2602 | .attach_expect = ctnetlink_glue_attach_expect, | |
2603 | .seq_adjust = ctnetlink_glue_seqadj, | |
9cb01766 | 2604 | }; |
83f3e94d | 2605 | #endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */ |
9cb01766 | 2606 | |
601e68e1 YH |
2607 | /*********************************************************************** |
2608 | * EXPECT | |
2609 | ***********************************************************************/ | |
c1d10adb | 2610 | |
4054ff45 PNA |
2611 | static int ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
2612 | const struct nf_conntrack_tuple *tuple, | |
a2b7cbdd | 2613 | u32 type) |
c1d10adb | 2614 | { |
df6fb868 | 2615 | struct nlattr *nest_parms; |
601e68e1 | 2616 | |
df6fb868 PM |
2617 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
2618 | if (!nest_parms) | |
2619 | goto nla_put_failure; | |
c1d10adb | 2620 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
df6fb868 PM |
2621 | goto nla_put_failure; |
2622 | nla_nest_end(skb, nest_parms); | |
c1d10adb PNA |
2623 | |
2624 | return 0; | |
2625 | ||
df6fb868 | 2626 | nla_put_failure: |
c1d10adb | 2627 | return -1; |
601e68e1 | 2628 | } |
c1d10adb | 2629 | |
4054ff45 PNA |
2630 | static int ctnetlink_exp_dump_mask(struct sk_buff *skb, |
2631 | const struct nf_conntrack_tuple *tuple, | |
2632 | const struct nf_conntrack_tuple_mask *mask) | |
1cde6436 | 2633 | { |
b3480fe0 | 2634 | const struct nf_conntrack_l4proto *l4proto; |
d4156e8c | 2635 | struct nf_conntrack_tuple m; |
df6fb868 | 2636 | struct nlattr *nest_parms; |
b3480fe0 | 2637 | int ret; |
d4156e8c PM |
2638 | |
2639 | memset(&m, 0xFF, sizeof(m)); | |
d4156e8c | 2640 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
e578756c PM |
2641 | m.src.u.all = mask->src.u.all; |
2642 | m.dst.protonum = tuple->dst.protonum; | |
d4156e8c | 2643 | |
df6fb868 PM |
2644 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
2645 | if (!nest_parms) | |
2646 | goto nla_put_failure; | |
1cde6436 | 2647 | |
3b988ece | 2648 | rcu_read_lock(); |
f957be9d | 2649 | ret = ctnetlink_dump_tuples_ip(skb, &m); |
3b988ece HS |
2650 | if (ret >= 0) { |
2651 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, | |
2652 | tuple->dst.protonum); | |
d4156e8c | 2653 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
3b988ece HS |
2654 | } |
2655 | rcu_read_unlock(); | |
2656 | ||
1cde6436 | 2657 | if (unlikely(ret < 0)) |
df6fb868 | 2658 | goto nla_put_failure; |
1cde6436 | 2659 | |
df6fb868 | 2660 | nla_nest_end(skb, nest_parms); |
1cde6436 PNA |
2661 | |
2662 | return 0; | |
2663 | ||
df6fb868 | 2664 | nla_put_failure: |
1cde6436 PNA |
2665 | return -1; |
2666 | } | |
2667 | ||
c7232c99 PM |
2668 | static const union nf_inet_addr any_addr; |
2669 | ||
bb5cf80e | 2670 | static int |
c1d10adb | 2671 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
601e68e1 | 2672 | const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2673 | { |
2674 | struct nf_conn *master = exp->master; | |
c1216382 | 2675 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
bc01befd | 2676 | struct nf_conn_help *help; |
076a0ca0 PNA |
2677 | #ifdef CONFIG_NF_NAT_NEEDED |
2678 | struct nlattr *nest_parms; | |
2679 | struct nf_conntrack_tuple nat_tuple = {}; | |
2680 | #endif | |
544d5c7d PNA |
2681 | struct nf_ct_helper_expectfn *expfn; |
2682 | ||
d978e5da PM |
2683 | if (timeout < 0) |
2684 | timeout = 0; | |
c1d10adb PNA |
2685 | |
2686 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) | |
df6fb868 | 2687 | goto nla_put_failure; |
1cde6436 | 2688 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
df6fb868 | 2689 | goto nla_put_failure; |
c1d10adb PNA |
2690 | if (ctnetlink_exp_dump_tuple(skb, |
2691 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
2692 | CTA_EXPECT_MASTER) < 0) | |
df6fb868 | 2693 | goto nla_put_failure; |
601e68e1 | 2694 | |
076a0ca0 | 2695 | #ifdef CONFIG_NF_NAT_NEEDED |
c7232c99 PM |
2696 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
2697 | exp->saved_proto.all) { | |
076a0ca0 PNA |
2698 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
2699 | if (!nest_parms) | |
2700 | goto nla_put_failure; | |
2701 | ||
cc1eb431 DM |
2702 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
2703 | goto nla_put_failure; | |
076a0ca0 PNA |
2704 | |
2705 | nat_tuple.src.l3num = nf_ct_l3num(master); | |
c7232c99 | 2706 | nat_tuple.src.u3 = exp->saved_addr; |
076a0ca0 PNA |
2707 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
2708 | nat_tuple.src.u = exp->saved_proto; | |
2709 | ||
2710 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, | |
2711 | CTA_EXPECT_NAT_TUPLE) < 0) | |
2712 | goto nla_put_failure; | |
2713 | nla_nest_end(skb, nest_parms); | |
2714 | } | |
2715 | #endif | |
cc1eb431 DM |
2716 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
2717 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || | |
2718 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || | |
2719 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) | |
2720 | goto nla_put_failure; | |
bc01befd PNA |
2721 | help = nfct_help(master); |
2722 | if (help) { | |
2723 | struct nf_conntrack_helper *helper; | |
2724 | ||
2725 | helper = rcu_dereference(help->helper); | |
cc1eb431 DM |
2726 | if (helper && |
2727 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) | |
2728 | goto nla_put_failure; | |
bc01befd | 2729 | } |
544d5c7d | 2730 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
cc1eb431 DM |
2731 | if (expfn != NULL && |
2732 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) | |
2733 | goto nla_put_failure; | |
c1d10adb PNA |
2734 | |
2735 | return 0; | |
601e68e1 | 2736 | |
df6fb868 | 2737 | nla_put_failure: |
c1d10adb PNA |
2738 | return -1; |
2739 | } | |
2740 | ||
2741 | static int | |
15e47304 | 2742 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
8b0a231d | 2743 | int event, const struct nf_conntrack_expect *exp) |
c1d10adb PNA |
2744 | { |
2745 | struct nlmsghdr *nlh; | |
2746 | struct nfgenmsg *nfmsg; | |
15e47304 | 2747 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
c1d10adb | 2748 | |
dedb67c4 | 2749 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event); |
15e47304 | 2750 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2751 | if (nlh == NULL) |
2752 | goto nlmsg_failure; | |
c1d10adb | 2753 | |
96bcf938 | 2754 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2755 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2756 | nfmsg->version = NFNETLINK_V0; | |
2757 | nfmsg->res_id = 0; | |
2758 | ||
2759 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 2760 | goto nla_put_failure; |
c1d10adb | 2761 | |
96bcf938 | 2762 | nlmsg_end(skb, nlh); |
c1d10adb PNA |
2763 | return skb->len; |
2764 | ||
2765 | nlmsg_failure: | |
df6fb868 | 2766 | nla_put_failure: |
96bcf938 | 2767 | nlmsg_cancel(skb, nlh); |
c1d10adb PNA |
2768 | return -1; |
2769 | } | |
2770 | ||
2771 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
e34d5c1a PNA |
2772 | static int |
2773 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) | |
c1d10adb | 2774 | { |
9592a5c0 AD |
2775 | struct nf_conntrack_expect *exp = item->exp; |
2776 | struct net *net = nf_ct_exp_net(exp); | |
c1d10adb PNA |
2777 | struct nlmsghdr *nlh; |
2778 | struct nfgenmsg *nfmsg; | |
c1d10adb | 2779 | struct sk_buff *skb; |
ebbf41df | 2780 | unsigned int type, group; |
c1d10adb PNA |
2781 | int flags = 0; |
2782 | ||
ebbf41df PNA |
2783 | if (events & (1 << IPEXP_DESTROY)) { |
2784 | type = IPCTNL_MSG_EXP_DELETE; | |
2785 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; | |
2786 | } else if (events & (1 << IPEXP_NEW)) { | |
c1d10adb PNA |
2787 | type = IPCTNL_MSG_EXP_NEW; |
2788 | flags = NLM_F_CREATE|NLM_F_EXCL; | |
ebbf41df | 2789 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
c1d10adb | 2790 | } else |
e34d5c1a | 2791 | return 0; |
c1d10adb | 2792 | |
ebbf41df | 2793 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
e34d5c1a | 2794 | return 0; |
b3a27bfb | 2795 | |
96bcf938 PNA |
2796 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
2797 | if (skb == NULL) | |
150ace0d | 2798 | goto errout; |
c1d10adb | 2799 | |
dedb67c4 | 2800 | type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type); |
15e47304 | 2801 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
96bcf938 PNA |
2802 | if (nlh == NULL) |
2803 | goto nlmsg_failure; | |
c1d10adb | 2804 | |
96bcf938 | 2805 | nfmsg = nlmsg_data(nlh); |
c1d10adb PNA |
2806 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
2807 | nfmsg->version = NFNETLINK_V0; | |
2808 | nfmsg->res_id = 0; | |
2809 | ||
2810 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) | |
df6fb868 | 2811 | goto nla_put_failure; |
c1d10adb | 2812 | |
96bcf938 | 2813 | nlmsg_end(skb, nlh); |
15e47304 | 2814 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
e34d5c1a | 2815 | return 0; |
c1d10adb | 2816 | |
df6fb868 | 2817 | nla_put_failure: |
96bcf938 | 2818 | nlmsg_cancel(skb, nlh); |
528a3a6f | 2819 | nlmsg_failure: |
c1d10adb | 2820 | kfree_skb(skb); |
150ace0d | 2821 | errout: |
9592a5c0 | 2822 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
e34d5c1a | 2823 | return 0; |
c1d10adb PNA |
2824 | } |
2825 | #endif | |
cf6994c2 PM |
2826 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
2827 | { | |
31f15875 PM |
2828 | if (cb->args[1]) |
2829 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); | |
cf6994c2 PM |
2830 | return 0; |
2831 | } | |
c1d10adb PNA |
2832 | |
2833 | static int | |
2834 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2835 | { | |
9592a5c0 | 2836 | struct net *net = sock_net(skb->sk); |
cf6994c2 | 2837 | struct nf_conntrack_expect *exp, *last; |
96bcf938 | 2838 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
87711cb8 | 2839 | u_int8_t l3proto = nfmsg->nfgen_family; |
c1d10adb | 2840 | |
7d0742da | 2841 | rcu_read_lock(); |
31f15875 PM |
2842 | last = (struct nf_conntrack_expect *)cb->args[1]; |
2843 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { | |
cf6994c2 | 2844 | restart: |
7cddd967 LZ |
2845 | hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]], |
2846 | hnode) { | |
31f15875 | 2847 | if (l3proto && exp->tuple.src.l3num != l3proto) |
cf6994c2 | 2848 | continue; |
03d7dc5c FW |
2849 | |
2850 | if (!net_eq(nf_ct_net(exp->master), net)) | |
2851 | continue; | |
2852 | ||
31f15875 PM |
2853 | if (cb->args[1]) { |
2854 | if (exp != last) | |
2855 | continue; | |
2856 | cb->args[1] = 0; | |
2857 | } | |
8b0a231d | 2858 | if (ctnetlink_exp_fill_info(skb, |
15e47304 | 2859 | NETLINK_CB(cb->skb).portid, |
31f15875 PM |
2860 | cb->nlh->nlmsg_seq, |
2861 | IPCTNL_MSG_EXP_NEW, | |
8b0a231d | 2862 | exp) < 0) { |
b54ab92b | 2863 | if (!refcount_inc_not_zero(&exp->use)) |
7d0742da | 2864 | continue; |
31f15875 PM |
2865 | cb->args[1] = (unsigned long)exp; |
2866 | goto out; | |
2867 | } | |
cf6994c2 | 2868 | } |
31f15875 PM |
2869 | if (cb->args[1]) { |
2870 | cb->args[1] = 0; | |
2871 | goto restart; | |
cf6994c2 PM |
2872 | } |
2873 | } | |
601e68e1 | 2874 | out: |
7d0742da | 2875 | rcu_read_unlock(); |
cf6994c2 PM |
2876 | if (last) |
2877 | nf_ct_expect_put(last); | |
c1d10adb | 2878 | |
c1d10adb PNA |
2879 | return skb->len; |
2880 | } | |
2881 | ||
e844a928 PNA |
2882 | static int |
2883 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) | |
2884 | { | |
2885 | struct nf_conntrack_expect *exp, *last; | |
2886 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
2887 | struct nf_conn *ct = cb->data; | |
2888 | struct nf_conn_help *help = nfct_help(ct); | |
2889 | u_int8_t l3proto = nfmsg->nfgen_family; | |
2890 | ||
2891 | if (cb->args[0]) | |
2892 | return 0; | |
2893 | ||
2894 | rcu_read_lock(); | |
2895 | last = (struct nf_conntrack_expect *)cb->args[1]; | |
2896 | restart: | |
7cddd967 | 2897 | hlist_for_each_entry_rcu(exp, &help->expectations, lnode) { |
e844a928 PNA |
2898 | if (l3proto && exp->tuple.src.l3num != l3proto) |
2899 | continue; | |
2900 | if (cb->args[1]) { | |
2901 | if (exp != last) | |
2902 | continue; | |
2903 | cb->args[1] = 0; | |
2904 | } | |
2905 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, | |
2906 | cb->nlh->nlmsg_seq, | |
2907 | IPCTNL_MSG_EXP_NEW, | |
2908 | exp) < 0) { | |
b54ab92b | 2909 | if (!refcount_inc_not_zero(&exp->use)) |
e844a928 PNA |
2910 | continue; |
2911 | cb->args[1] = (unsigned long)exp; | |
2912 | goto out; | |
2913 | } | |
2914 | } | |
2915 | if (cb->args[1]) { | |
2916 | cb->args[1] = 0; | |
2917 | goto restart; | |
2918 | } | |
2919 | cb->args[0] = 1; | |
2920 | out: | |
2921 | rcu_read_unlock(); | |
2922 | if (last) | |
2923 | nf_ct_expect_put(last); | |
2924 | ||
2925 | return skb->len; | |
2926 | } | |
2927 | ||
7b8002a1 PNA |
2928 | static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl, |
2929 | struct sk_buff *skb, | |
e844a928 | 2930 | const struct nlmsghdr *nlh, |
04ba724b PNA |
2931 | const struct nlattr * const cda[], |
2932 | struct netlink_ext_ack *extack) | |
e844a928 PNA |
2933 | { |
2934 | int err; | |
e844a928 PNA |
2935 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
2936 | u_int8_t u3 = nfmsg->nfgen_family; | |
2937 | struct nf_conntrack_tuple tuple; | |
2938 | struct nf_conntrack_tuple_hash *h; | |
2939 | struct nf_conn *ct; | |
308ac914 | 2940 | struct nf_conntrack_zone zone; |
e844a928 PNA |
2941 | struct netlink_dump_control c = { |
2942 | .dump = ctnetlink_exp_ct_dump_table, | |
2943 | .done = ctnetlink_exp_done, | |
2944 | }; | |
2945 | ||
deedb590 DB |
2946 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
2947 | u3, NULL); | |
e844a928 PNA |
2948 | if (err < 0) |
2949 | return err; | |
2950 | ||
308ac914 DB |
2951 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
2952 | if (err < 0) | |
2953 | return err; | |
e844a928 | 2954 | |
308ac914 | 2955 | h = nf_conntrack_find_get(net, &zone, &tuple); |
e844a928 PNA |
2956 | if (!h) |
2957 | return -ENOENT; | |
2958 | ||
2959 | ct = nf_ct_tuplehash_to_ctrack(h); | |
207df815 LZ |
2960 | /* No expectation linked to this connection tracking. */ |
2961 | if (!nfct_help(ct)) { | |
2962 | nf_ct_put(ct); | |
2963 | return 0; | |
2964 | } | |
2965 | ||
e844a928 PNA |
2966 | c.data = ct; |
2967 | ||
2968 | err = netlink_dump_start(ctnl, skb, nlh, &c); | |
2969 | nf_ct_put(ct); | |
2970 | ||
2971 | return err; | |
2972 | } | |
2973 | ||
7b8002a1 PNA |
2974 | static int ctnetlink_get_expect(struct net *net, struct sock *ctnl, |
2975 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2976 | const struct nlattr * const cda[], |
2977 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
2978 | { |
2979 | struct nf_conntrack_tuple tuple; | |
2980 | struct nf_conntrack_expect *exp; | |
2981 | struct sk_buff *skb2; | |
96bcf938 | 2982 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 2983 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 2984 | struct nf_conntrack_zone zone; |
ef00f89f | 2985 | int err; |
c1d10adb | 2986 | |
b8f3ab42 | 2987 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
e844a928 | 2988 | if (cda[CTA_EXPECT_MASTER]) |
04ba724b PNA |
2989 | return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda, |
2990 | extack); | |
e844a928 PNA |
2991 | else { |
2992 | struct netlink_dump_control c = { | |
2993 | .dump = ctnetlink_exp_dump_table, | |
2994 | .done = ctnetlink_exp_done, | |
2995 | }; | |
2996 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
2997 | } | |
c1d10adb PNA |
2998 | } |
2999 | ||
ef00f89f PM |
3000 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
3001 | if (err < 0) | |
3002 | return err; | |
3003 | ||
35dba1d7 | 3004 | if (cda[CTA_EXPECT_TUPLE]) |
deedb590 DB |
3005 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3006 | u3, NULL); | |
35dba1d7 | 3007 | else if (cda[CTA_EXPECT_MASTER]) |
deedb590 DB |
3008 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
3009 | u3, NULL); | |
c1d10adb PNA |
3010 | else |
3011 | return -EINVAL; | |
3012 | ||
3013 | if (err < 0) | |
3014 | return err; | |
3015 | ||
308ac914 | 3016 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
c1d10adb PNA |
3017 | if (!exp) |
3018 | return -ENOENT; | |
3019 | ||
df6fb868 | 3020 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 3021 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 3022 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 3023 | nf_ct_expect_put(exp); |
c1d10adb PNA |
3024 | return -ENOENT; |
3025 | } | |
601e68e1 | 3026 | } |
c1d10adb PNA |
3027 | |
3028 | err = -ENOMEM; | |
96bcf938 | 3029 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
81378f72 PNA |
3030 | if (skb2 == NULL) { |
3031 | nf_ct_expect_put(exp); | |
c1d10adb | 3032 | goto out; |
81378f72 | 3033 | } |
4e9b8269 | 3034 | |
528a3a6f | 3035 | rcu_read_lock(); |
15e47304 | 3036 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
8b0a231d | 3037 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
528a3a6f | 3038 | rcu_read_unlock(); |
81378f72 | 3039 | nf_ct_expect_put(exp); |
c1d10adb PNA |
3040 | if (err <= 0) |
3041 | goto free; | |
3042 | ||
15e47304 | 3043 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
81378f72 PNA |
3044 | if (err < 0) |
3045 | goto out; | |
c1d10adb | 3046 | |
81378f72 | 3047 | return 0; |
c1d10adb PNA |
3048 | |
3049 | free: | |
3050 | kfree_skb(skb2); | |
3051 | out: | |
81378f72 PNA |
3052 | /* this avoids a loop in nfnetlink. */ |
3053 | return err == -EAGAIN ? -ENOBUFS : err; | |
c1d10adb PNA |
3054 | } |
3055 | ||
ac7b8483 FW |
3056 | static bool expect_iter_name(struct nf_conntrack_expect *exp, void *data) |
3057 | { | |
3058 | const struct nf_conn_help *m_help; | |
3059 | const char *name = data; | |
3060 | ||
3061 | m_help = nfct_help(exp->master); | |
3062 | ||
3063 | return strcmp(m_help->helper->name, name) == 0; | |
3064 | } | |
3065 | ||
3066 | static bool expect_iter_all(struct nf_conntrack_expect *exp, void *data) | |
3067 | { | |
3068 | return true; | |
3069 | } | |
3070 | ||
7b8002a1 PNA |
3071 | static int ctnetlink_del_expect(struct net *net, struct sock *ctnl, |
3072 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
3073 | const struct nlattr * const cda[], |
3074 | struct netlink_ext_ack *extack) | |
c1d10adb | 3075 | { |
31f15875 | 3076 | struct nf_conntrack_expect *exp; |
c1d10adb | 3077 | struct nf_conntrack_tuple tuple; |
96bcf938 | 3078 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 3079 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 3080 | struct nf_conntrack_zone zone; |
c1d10adb PNA |
3081 | int err; |
3082 | ||
df6fb868 | 3083 | if (cda[CTA_EXPECT_TUPLE]) { |
c1d10adb | 3084 | /* delete a single expect by tuple */ |
ef00f89f PM |
3085 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
3086 | if (err < 0) | |
3087 | return err; | |
3088 | ||
deedb590 DB |
3089 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3090 | u3, NULL); | |
c1d10adb PNA |
3091 | if (err < 0) |
3092 | return err; | |
3093 | ||
3094 | /* bump usage count to 2 */ | |
308ac914 | 3095 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
c1d10adb PNA |
3096 | if (!exp) |
3097 | return -ENOENT; | |
3098 | ||
df6fb868 | 3099 | if (cda[CTA_EXPECT_ID]) { |
77236b6e | 3100 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
35832402 | 3101 | if (ntohl(id) != (u32)(unsigned long)exp) { |
6823645d | 3102 | nf_ct_expect_put(exp); |
c1d10adb PNA |
3103 | return -ENOENT; |
3104 | } | |
3105 | } | |
3106 | ||
3107 | /* after list removal, usage count == 1 */ | |
ca7433df | 3108 | spin_lock_bh(&nf_conntrack_expect_lock); |
ebbf41df | 3109 | if (del_timer(&exp->timeout)) { |
15e47304 | 3110 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
ebbf41df PNA |
3111 | nlmsg_report(nlh)); |
3112 | nf_ct_expect_put(exp); | |
3113 | } | |
ca7433df | 3114 | spin_unlock_bh(&nf_conntrack_expect_lock); |
601e68e1 | 3115 | /* have to put what we 'get' above. |
c1d10adb | 3116 | * after this line usage count == 0 */ |
6823645d | 3117 | nf_ct_expect_put(exp); |
df6fb868 PM |
3118 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
3119 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
c1d10adb | 3120 | |
ac7b8483 FW |
3121 | nf_ct_expect_iterate_net(net, expect_iter_name, name, |
3122 | NETLINK_CB(skb).portid, | |
3123 | nlmsg_report(nlh)); | |
c1d10adb PNA |
3124 | } else { |
3125 | /* This basically means we have to flush everything*/ | |
ac7b8483 FW |
3126 | nf_ct_expect_iterate_net(net, expect_iter_all, NULL, |
3127 | NETLINK_CB(skb).portid, | |
3128 | nlmsg_report(nlh)); | |
c1d10adb PNA |
3129 | } |
3130 | ||
3131 | return 0; | |
3132 | } | |
3133 | static int | |
39938324 PM |
3134 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
3135 | const struct nlattr * const cda[]) | |
c1d10adb | 3136 | { |
9768e1ac KW |
3137 | if (cda[CTA_EXPECT_TIMEOUT]) { |
3138 | if (!del_timer(&x->timeout)) | |
3139 | return -ETIME; | |
3140 | ||
3141 | x->timeout.expires = jiffies + | |
3142 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; | |
3143 | add_timer(&x->timeout); | |
3144 | } | |
3145 | return 0; | |
c1d10adb PNA |
3146 | } |
3147 | ||
076a0ca0 PNA |
3148 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
3149 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, | |
3150 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, | |
3151 | }; | |
3152 | ||
3153 | static int | |
3154 | ctnetlink_parse_expect_nat(const struct nlattr *attr, | |
3155 | struct nf_conntrack_expect *exp, | |
3156 | u_int8_t u3) | |
3157 | { | |
3158 | #ifdef CONFIG_NF_NAT_NEEDED | |
3159 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; | |
3160 | struct nf_conntrack_tuple nat_tuple = {}; | |
3161 | int err; | |
3162 | ||
fceb6435 JB |
3163 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, |
3164 | exp_nat_nla_policy, NULL); | |
130ffbc2 DB |
3165 | if (err < 0) |
3166 | return err; | |
076a0ca0 PNA |
3167 | |
3168 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) | |
3169 | return -EINVAL; | |
3170 | ||
3171 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, | |
deedb590 DB |
3172 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, |
3173 | u3, NULL); | |
076a0ca0 PNA |
3174 | if (err < 0) |
3175 | return err; | |
3176 | ||
c7232c99 | 3177 | exp->saved_addr = nat_tuple.src.u3; |
076a0ca0 PNA |
3178 | exp->saved_proto = nat_tuple.src.u; |
3179 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); | |
3180 | ||
3181 | return 0; | |
3182 | #else | |
3183 | return -EOPNOTSUPP; | |
3184 | #endif | |
3185 | } | |
3186 | ||
0ef71ee1 PNA |
3187 | static struct nf_conntrack_expect * |
3188 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, | |
3189 | struct nf_conntrack_helper *helper, | |
3190 | struct nf_conntrack_tuple *tuple, | |
3191 | struct nf_conntrack_tuple *mask) | |
c1d10adb | 3192 | { |
0ef71ee1 | 3193 | u_int32_t class = 0; |
c1d10adb | 3194 | struct nf_conntrack_expect *exp; |
dc808fe2 | 3195 | struct nf_conn_help *help; |
0ef71ee1 | 3196 | int err; |
660fdb2a | 3197 | |
2c62e0bc GF |
3198 | help = nfct_help(ct); |
3199 | if (!help) | |
3200 | return ERR_PTR(-EOPNOTSUPP); | |
3201 | ||
b8c5e52c PNA |
3202 | if (cda[CTA_EXPECT_CLASS] && helper) { |
3203 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); | |
0ef71ee1 PNA |
3204 | if (class > helper->expect_class_max) |
3205 | return ERR_PTR(-EINVAL); | |
b8c5e52c | 3206 | } |
6823645d | 3207 | exp = nf_ct_expect_alloc(ct); |
0ef71ee1 PNA |
3208 | if (!exp) |
3209 | return ERR_PTR(-ENOMEM); | |
3210 | ||
2c62e0bc GF |
3211 | if (cda[CTA_EXPECT_FLAGS]) { |
3212 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); | |
3213 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; | |
bc01befd | 3214 | } else { |
2c62e0bc | 3215 | exp->flags = 0; |
bc01befd | 3216 | } |
544d5c7d PNA |
3217 | if (cda[CTA_EXPECT_FN]) { |
3218 | const char *name = nla_data(cda[CTA_EXPECT_FN]); | |
3219 | struct nf_ct_helper_expectfn *expfn; | |
3220 | ||
3221 | expfn = nf_ct_helper_expectfn_find_by_name(name); | |
3222 | if (expfn == NULL) { | |
3223 | err = -EINVAL; | |
3224 | goto err_out; | |
3225 | } | |
3226 | exp->expectfn = expfn->expectfn; | |
3227 | } else | |
3228 | exp->expectfn = NULL; | |
601e68e1 | 3229 | |
b8c5e52c | 3230 | exp->class = class; |
c1d10adb | 3231 | exp->master = ct; |
660fdb2a | 3232 | exp->helper = helper; |
0ef71ee1 PNA |
3233 | exp->tuple = *tuple; |
3234 | exp->mask.src.u3 = mask->src.u3; | |
3235 | exp->mask.src.u.all = mask->src.u.all; | |
c1d10adb | 3236 | |
076a0ca0 PNA |
3237 | if (cda[CTA_EXPECT_NAT]) { |
3238 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], | |
0ef71ee1 | 3239 | exp, nf_ct_l3num(ct)); |
076a0ca0 PNA |
3240 | if (err < 0) |
3241 | goto err_out; | |
3242 | } | |
0ef71ee1 | 3243 | return exp; |
076a0ca0 | 3244 | err_out: |
6823645d | 3245 | nf_ct_expect_put(exp); |
0ef71ee1 PNA |
3246 | return ERR_PTR(err); |
3247 | } | |
3248 | ||
3249 | static int | |
308ac914 DB |
3250 | ctnetlink_create_expect(struct net *net, |
3251 | const struct nf_conntrack_zone *zone, | |
0ef71ee1 PNA |
3252 | const struct nlattr * const cda[], |
3253 | u_int8_t u3, u32 portid, int report) | |
3254 | { | |
3255 | struct nf_conntrack_tuple tuple, mask, master_tuple; | |
3256 | struct nf_conntrack_tuple_hash *h = NULL; | |
3257 | struct nf_conntrack_helper *helper = NULL; | |
3258 | struct nf_conntrack_expect *exp; | |
3259 | struct nf_conn *ct; | |
3260 | int err; | |
3261 | ||
3262 | /* caller guarantees that those three CTA_EXPECT_* exist */ | |
deedb590 DB |
3263 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3264 | u3, NULL); | |
0ef71ee1 PNA |
3265 | if (err < 0) |
3266 | return err; | |
deedb590 DB |
3267 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, |
3268 | u3, NULL); | |
0ef71ee1 PNA |
3269 | if (err < 0) |
3270 | return err; | |
deedb590 DB |
3271 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, |
3272 | u3, NULL); | |
0ef71ee1 PNA |
3273 | if (err < 0) |
3274 | return err; | |
3275 | ||
3276 | /* Look for master conntrack of this expectation */ | |
3277 | h = nf_conntrack_find_get(net, zone, &master_tuple); | |
3278 | if (!h) | |
3279 | return -ENOENT; | |
3280 | ct = nf_ct_tuplehash_to_ctrack(h); | |
3281 | ||
8b5995d0 | 3282 | rcu_read_lock(); |
0ef71ee1 PNA |
3283 | if (cda[CTA_EXPECT_HELP_NAME]) { |
3284 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); | |
3285 | ||
3286 | helper = __nf_conntrack_helper_find(helpname, u3, | |
3287 | nf_ct_protonum(ct)); | |
3288 | if (helper == NULL) { | |
8b5995d0 | 3289 | rcu_read_unlock(); |
0ef71ee1 PNA |
3290 | #ifdef CONFIG_MODULES |
3291 | if (request_module("nfct-helper-%s", helpname) < 0) { | |
3292 | err = -EOPNOTSUPP; | |
3293 | goto err_ct; | |
3294 | } | |
8b5995d0 | 3295 | rcu_read_lock(); |
0ef71ee1 PNA |
3296 | helper = __nf_conntrack_helper_find(helpname, u3, |
3297 | nf_ct_protonum(ct)); | |
3298 | if (helper) { | |
3299 | err = -EAGAIN; | |
8b5995d0 | 3300 | goto err_rcu; |
0ef71ee1 | 3301 | } |
8b5995d0 | 3302 | rcu_read_unlock(); |
0ef71ee1 PNA |
3303 | #endif |
3304 | err = -EOPNOTSUPP; | |
3305 | goto err_ct; | |
3306 | } | |
3307 | } | |
3308 | ||
3309 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); | |
3310 | if (IS_ERR(exp)) { | |
3311 | err = PTR_ERR(exp); | |
8b5995d0 | 3312 | goto err_rcu; |
0ef71ee1 PNA |
3313 | } |
3314 | ||
3315 | err = nf_ct_expect_related_report(exp, portid, report); | |
0ef71ee1 | 3316 | nf_ct_expect_put(exp); |
8b5995d0 GF |
3317 | err_rcu: |
3318 | rcu_read_unlock(); | |
0ef71ee1 PNA |
3319 | err_ct: |
3320 | nf_ct_put(ct); | |
c1d10adb PNA |
3321 | return err; |
3322 | } | |
3323 | ||
7b8002a1 PNA |
3324 | static int ctnetlink_new_expect(struct net *net, struct sock *ctnl, |
3325 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
3326 | const struct nlattr * const cda[], |
3327 | struct netlink_ext_ack *extack) | |
c1d10adb PNA |
3328 | { |
3329 | struct nf_conntrack_tuple tuple; | |
3330 | struct nf_conntrack_expect *exp; | |
96bcf938 | 3331 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
c1d10adb | 3332 | u_int8_t u3 = nfmsg->nfgen_family; |
308ac914 | 3333 | struct nf_conntrack_zone zone; |
ef00f89f | 3334 | int err; |
c1d10adb | 3335 | |
df6fb868 PM |
3336 | if (!cda[CTA_EXPECT_TUPLE] |
3337 | || !cda[CTA_EXPECT_MASK] | |
3338 | || !cda[CTA_EXPECT_MASTER]) | |
c1d10adb PNA |
3339 | return -EINVAL; |
3340 | ||
ef00f89f PM |
3341 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
3342 | if (err < 0) | |
3343 | return err; | |
3344 | ||
deedb590 DB |
3345 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
3346 | u3, NULL); | |
c1d10adb PNA |
3347 | if (err < 0) |
3348 | return err; | |
3349 | ||
ca7433df | 3350 | spin_lock_bh(&nf_conntrack_expect_lock); |
308ac914 | 3351 | exp = __nf_ct_expect_find(net, &zone, &tuple); |
c1d10adb | 3352 | if (!exp) { |
ca7433df | 3353 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 3354 | err = -ENOENT; |
19abb7b0 | 3355 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
308ac914 | 3356 | err = ctnetlink_create_expect(net, &zone, cda, u3, |
15e47304 | 3357 | NETLINK_CB(skb).portid, |
19abb7b0 PNA |
3358 | nlmsg_report(nlh)); |
3359 | } | |
c1d10adb PNA |
3360 | return err; |
3361 | } | |
3362 | ||
3363 | err = -EEXIST; | |
3364 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) | |
3365 | err = ctnetlink_change_expect(exp, cda); | |
ca7433df | 3366 | spin_unlock_bh(&nf_conntrack_expect_lock); |
c1d10adb | 3367 | |
c1d10adb PNA |
3368 | return err; |
3369 | } | |
3370 | ||
392025f8 | 3371 | static int |
15e47304 | 3372 | ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu, |
392025f8 PNA |
3373 | const struct ip_conntrack_stat *st) |
3374 | { | |
3375 | struct nlmsghdr *nlh; | |
3376 | struct nfgenmsg *nfmsg; | |
15e47304 | 3377 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
392025f8 | 3378 | |
dedb67c4 PNA |
3379 | event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, |
3380 | IPCTNL_MSG_EXP_GET_STATS_CPU); | |
15e47304 | 3381 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
392025f8 PNA |
3382 | if (nlh == NULL) |
3383 | goto nlmsg_failure; | |
3384 | ||
3385 | nfmsg = nlmsg_data(nlh); | |
3386 | nfmsg->nfgen_family = AF_UNSPEC; | |
3387 | nfmsg->version = NFNETLINK_V0; | |
3388 | nfmsg->res_id = htons(cpu); | |
3389 | ||
3390 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || | |
3391 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || | |
3392 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) | |
3393 | goto nla_put_failure; | |
3394 | ||
3395 | nlmsg_end(skb, nlh); | |
3396 | return skb->len; | |
3397 | ||
3398 | nla_put_failure: | |
3399 | nlmsg_failure: | |
3400 | nlmsg_cancel(skb, nlh); | |
3401 | return -1; | |
3402 | } | |
3403 | ||
3404 | static int | |
3405 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3406 | { | |
3407 | int cpu; | |
3408 | struct net *net = sock_net(skb->sk); | |
3409 | ||
3410 | if (cb->args[0] == nr_cpu_ids) | |
3411 | return 0; | |
3412 | ||
3413 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { | |
3414 | const struct ip_conntrack_stat *st; | |
3415 | ||
3416 | if (!cpu_possible(cpu)) | |
3417 | continue; | |
3418 | ||
3419 | st = per_cpu_ptr(net->ct.stat, cpu); | |
15e47304 | 3420 | if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid, |
392025f8 PNA |
3421 | cb->nlh->nlmsg_seq, |
3422 | cpu, st) < 0) | |
3423 | break; | |
3424 | } | |
3425 | cb->args[0] = cpu; | |
3426 | ||
3427 | return skb->len; | |
3428 | } | |
3429 | ||
7b8002a1 PNA |
3430 | static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl, |
3431 | struct sk_buff *skb, | |
3432 | const struct nlmsghdr *nlh, | |
04ba724b PNA |
3433 | const struct nlattr * const cda[], |
3434 | struct netlink_ext_ack *extack) | |
392025f8 PNA |
3435 | { |
3436 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
3437 | struct netlink_dump_control c = { | |
3438 | .dump = ctnetlink_exp_stat_cpu_dump, | |
3439 | }; | |
3440 | return netlink_dump_start(ctnl, skb, nlh, &c); | |
3441 | } | |
3442 | ||
3443 | return 0; | |
3444 | } | |
3445 | ||
c1d10adb | 3446 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
e34d5c1a PNA |
3447 | static struct nf_ct_event_notifier ctnl_notifier = { |
3448 | .fcn = ctnetlink_conntrack_event, | |
c1d10adb PNA |
3449 | }; |
3450 | ||
e34d5c1a PNA |
3451 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
3452 | .fcn = ctnetlink_expect_event, | |
c1d10adb PNA |
3453 | }; |
3454 | #endif | |
3455 | ||
7c8d4cb4 | 3456 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
c1d10adb | 3457 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
f73e924c PM |
3458 | .attr_count = CTA_MAX, |
3459 | .policy = ct_nla_policy }, | |
c1d10adb | 3460 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3461 | .attr_count = CTA_MAX, |
3462 | .policy = ct_nla_policy }, | |
c1d10adb | 3463 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
f73e924c PM |
3464 | .attr_count = CTA_MAX, |
3465 | .policy = ct_nla_policy }, | |
c1d10adb | 3466 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
f73e924c PM |
3467 | .attr_count = CTA_MAX, |
3468 | .policy = ct_nla_policy }, | |
392025f8 PNA |
3469 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
3470 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, | |
d871befe PNA |
3471 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
3472 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, | |
c1d10adb PNA |
3473 | }; |
3474 | ||
7c8d4cb4 | 3475 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
c1d10adb | 3476 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
f73e924c PM |
3477 | .attr_count = CTA_EXPECT_MAX, |
3478 | .policy = exp_nla_policy }, | |
c1d10adb | 3479 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
f73e924c PM |
3480 | .attr_count = CTA_EXPECT_MAX, |
3481 | .policy = exp_nla_policy }, | |
c1d10adb | 3482 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
f73e924c PM |
3483 | .attr_count = CTA_EXPECT_MAX, |
3484 | .policy = exp_nla_policy }, | |
392025f8 | 3485 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
c1d10adb PNA |
3486 | }; |
3487 | ||
7c8d4cb4 | 3488 | static const struct nfnetlink_subsystem ctnl_subsys = { |
c1d10adb PNA |
3489 | .name = "conntrack", |
3490 | .subsys_id = NFNL_SUBSYS_CTNETLINK, | |
3491 | .cb_count = IPCTNL_MSG_MAX, | |
3492 | .cb = ctnl_cb, | |
3493 | }; | |
3494 | ||
7c8d4cb4 | 3495 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
c1d10adb PNA |
3496 | .name = "conntrack_expect", |
3497 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, | |
3498 | .cb_count = IPCTNL_MSG_EXP_MAX, | |
3499 | .cb = ctnl_exp_cb, | |
3500 | }; | |
3501 | ||
d2483dde | 3502 | MODULE_ALIAS("ip_conntrack_netlink"); |
c1d10adb | 3503 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
34f9a2e4 | 3504 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
c1d10adb | 3505 | |
70e9942f PNA |
3506 | static int __net_init ctnetlink_net_init(struct net *net) |
3507 | { | |
3508 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3509 | int ret; | |
3510 | ||
3511 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); | |
3512 | if (ret < 0) { | |
3513 | pr_err("ctnetlink_init: cannot register notifier.\n"); | |
3514 | goto err_out; | |
3515 | } | |
3516 | ||
3517 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); | |
3518 | if (ret < 0) { | |
3519 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); | |
3520 | goto err_unreg_notifier; | |
3521 | } | |
3522 | #endif | |
3523 | return 0; | |
3524 | ||
3525 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3526 | err_unreg_notifier: | |
3527 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3528 | err_out: | |
3529 | return ret; | |
3530 | #endif | |
3531 | } | |
3532 | ||
3533 | static void ctnetlink_net_exit(struct net *net) | |
3534 | { | |
3535 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
3536 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); | |
3537 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); | |
3538 | #endif | |
3539 | } | |
3540 | ||
3541 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) | |
3542 | { | |
3543 | struct net *net; | |
3544 | ||
3545 | list_for_each_entry(net, net_exit_list, exit_list) | |
3546 | ctnetlink_net_exit(net); | |
3547 | } | |
3548 | ||
3549 | static struct pernet_operations ctnetlink_net_ops = { | |
3550 | .init = ctnetlink_net_init, | |
3551 | .exit_batch = ctnetlink_net_exit_batch, | |
3552 | }; | |
3553 | ||
c1d10adb PNA |
3554 | static int __init ctnetlink_init(void) |
3555 | { | |
3556 | int ret; | |
3557 | ||
c1d10adb PNA |
3558 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
3559 | if (ret < 0) { | |
654d0fbd | 3560 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
c1d10adb PNA |
3561 | goto err_out; |
3562 | } | |
3563 | ||
3564 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); | |
3565 | if (ret < 0) { | |
654d0fbd | 3566 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
c1d10adb PNA |
3567 | goto err_unreg_subsys; |
3568 | } | |
3569 | ||
ef6acf68 JL |
3570 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
3571 | if (ret < 0) { | |
70e9942f | 3572 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
c1d10adb PNA |
3573 | goto err_unreg_exp_subsys; |
3574 | } | |
83f3e94d | 3575 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
9cb01766 | 3576 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
a4b4766c | 3577 | RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook); |
9cb01766 | 3578 | #endif |
c1d10adb PNA |
3579 | return 0; |
3580 | ||
c1d10adb PNA |
3581 | err_unreg_exp_subsys: |
3582 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); | |
c1d10adb PNA |
3583 | err_unreg_subsys: |
3584 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
3585 | err_out: | |
3586 | return ret; | |
3587 | } | |
3588 | ||
3589 | static void __exit ctnetlink_exit(void) | |
3590 | { | |
70e9942f | 3591 | unregister_pernet_subsys(&ctnetlink_net_ops); |
c1d10adb PNA |
3592 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
3593 | nfnetlink_subsys_unregister(&ctnl_subsys); | |
83f3e94d | 3594 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
a4b4766c | 3595 | RCU_INIT_POINTER(nfnl_ct_hook, NULL); |
9cb01766 | 3596 | #endif |
3b7dabf0 | 3597 | synchronize_rcu(); |
c1d10adb PNA |
3598 | } |
3599 | ||
3600 | module_init(ctnetlink_init); | |
3601 | module_exit(ctnetlink_exit); |