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Merge remote-tracking branch 'h8300/h8300-next'
[deliverable/linux.git] / net / ipv4 / inet_diag.c
CommitLineData
1da177e4 1/*
73c1f4a0 2 * inet_diag.c Module for monitoring INET transport protocols sockets.
1da177e4 3 *
1da177e4
LT		 4 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
172589cc 12#include <linux/kernel.h>
1da177e4
LT		 13#include <linux/module.h>
14#include <linux/types.h>
15#include <linux/fcntl.h>
16#include <linux/random.h>
5a0e3ad6 17#include <linux/slab.h>
1da177e4
LT		 18#include <linux/cache.h>
19#include <linux/init.h>
20#include <linux/time.h>
21
22#include <net/icmp.h>
23#include <net/tcp.h>
24#include <net/ipv6.h>
25#include <net/inet_common.h>
505cbfc5
ACM		 26#include <net/inet_connection_sock.h>
27#include <net/inet_hashtables.h>
28#include <net/inet_timewait_sock.h>
29#include <net/inet6_hashtables.h>
dc5fc579 30#include <net/netlink.h>
1da177e4
LT		 31
32#include <linux/inet.h>
33#include <linux/stddef.h>
34
a8c2190e 35#include <linux/inet_diag.h>
d366477a 36#include <linux/sock_diag.h>
1da177e4 37
4f5736c4
ACM		 38static const struct inet_diag_handler **inet_diag_table;
39
73c1f4a0 40struct inet_diag_entry {
e31c5e0e
ED		 41 const __be32 *saddr;
42 const __be32 *daddr;
1da177e4
LT		 43 u16 sport;
44 u16 dport;
45 u16 family;
46 u16 userlocks;
637c841d 47 u32 ifindex;
1da177e4
LT		 48};
49
d523a328
HX		 50static DEFINE_MUTEX(inet_diag_table_mutex);
51
f13c95f0 52static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
d523a328 53{
f13c95f0 54 if (!inet_diag_table[proto])
aec8dc62
PE		 55 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
56 NETLINK_SOCK_DIAG, AF_INET, proto);
d523a328
HX		 57
58 mutex_lock(&inet_diag_table_mutex);
f13c95f0 59 if (!inet_diag_table[proto])
d523a328
HX		 60 return ERR_PTR(-ENOENT);
61
f13c95f0 62 return inet_diag_table[proto];
d523a328
HX		 63}
64
e31c5e0e 65static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
d523a328
HX		 66{
67 mutex_unlock(&inet_diag_table_mutex);
68}
69
cb2050a7 70void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk)
a4458343
ED		 71{
72 r->idiag_family = sk->sk_family;
73
74 r->id.idiag_sport = htons(sk->sk_num);
75 r->id.idiag_dport = sk->sk_dport;
76 r->id.idiag_if = sk->sk_bound_dev_if;
77 sock_diag_save_cookie(sk, r->id.idiag_cookie);
78
79#if IS_ENABLED(CONFIG_IPV6)
80 if (sk->sk_family == AF_INET6) {
81 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
82 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
83 } else
84#endif
85 {
86 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
87 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
88
89 r->id.idiag_src[0] = sk->sk_rcv_saddr;
90 r->id.idiag_dst[0] = sk->sk_daddr;
91 }
92}
cb2050a7 93EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill);
a4458343 94
c8e2c80d
ED		 95static size_t inet_sk_attr_size(void)
96{
97 return nla_total_size(sizeof(struct tcp_info))
98 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
99 + nla_total_size(1) /* INET_DIAG_TOS */
100 + nla_total_size(1) /* INET_DIAG_TCLASS */
101 + nla_total_size(sizeof(struct inet_diag_meminfo))
102 + nla_total_size(sizeof(struct inet_diag_msg))
103 + nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
104 + nla_total_size(TCP_CA_NAME_MAX)
105 + nla_total_size(sizeof(struct tcpvegas_info))
106 + 64;
107}
108
cb2050a7
XL		 109int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
110 struct inet_diag_msg *r, int ext,
111 struct user_namespace *user_ns)
112{
113 const struct inet_sock *inet = inet_sk(sk);
114
115 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
116 goto errout;
117
118 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
119 * hence this needs to be included regardless of socket family.
120 */
121 if (ext & (1 << (INET_DIAG_TOS - 1)))
122 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
123 goto errout;
124
125#if IS_ENABLED(CONFIG_IPV6)
126 if (r->idiag_family == AF_INET6) {
127 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
128 if (nla_put_u8(skb, INET_DIAG_TCLASS,
129 inet6_sk(sk)->tclass) < 0)
130 goto errout;
131
132 if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
133 nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
134 goto errout;
135 }
136#endif
137
138 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
139 r->idiag_inode = sock_i_ino(sk);
140
141 return 0;
142errout:
143 return 1;
144}
145EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill);
146
3c4d05c8 147int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
34160ea3 148 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
e31c5e0e
ED		 149 struct user_namespace *user_ns,
150 u32 portid, u32 seq, u16 nlmsg_flags,
151 const struct nlmsghdr *unlh)
1da177e4 152{
521f1cf1 153 const struct tcp_congestion_ops *ca_ops;
e31c5e0e
ED		 154 const struct inet_diag_handler *handler;
155 int ext = req->idiag_ext;
73c1f4a0 156 struct inet_diag_msg *r;
1da177e4 157 struct nlmsghdr *nlh;
6e277ed5 158 struct nlattr *attr;
4f5736c4 159 void *info = NULL;
4f5736c4 160
a029fe26 161 handler = inet_diag_table[req->sdiag_protocol];
e31c5e0e 162 BUG_ON(!handler);
1da177e4 163
15e47304 164 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
6e277ed5
TG		 165 nlmsg_flags);
166 if (!nlh)
d106352d 167 return -EMSGSIZE;
4f5736c4 168
d106352d 169 r = nlmsg_data(nlh);
a58917f5 170 BUG_ON(!sk_fullsock(sk));
c7d58aab 171
a4458343 172 inet_diag_msg_common_fill(r, sk);
73c1f4a0
ACM		 173 r->idiag_state = sk->sk_state;
174 r->idiag_timer = 0;
175 r->idiag_retrans = 0;
1da177e4 176
cb2050a7 177 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns))
e4e541a8
PE		 178 goto errout;
179
6e277ed5
TG		 180 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
181 struct inet_diag_meminfo minfo = {
182 .idiag_rmem = sk_rmem_alloc_get(sk),
183 .idiag_wmem = sk->sk_wmem_queued,
184 .idiag_fmem = sk->sk_forward_alloc,
185 .idiag_tmem = sk_wmem_alloc_get(sk),
186 };
187
188 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
189 goto errout;
3c4d05c8
PE		 190 }
191
c0636faa
PE		 192 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
193 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
6e277ed5 194 goto errout;
c0636faa 195
e31c5e0e 196 if (!icsk) {
62ad6fcd 197 handler->idiag_get_info(sk, r, NULL);
3c4d05c8
PE		 198 goto out;
199 }
200
6ba8a3b1
ND		 201 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
202 icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
203 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
73c1f4a0
ACM		 204 r->idiag_timer = 1;
205 r->idiag_retrans = icsk->icsk_retransmits;
b7de529c
XL		 206 r->idiag_expires =
207 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
463c84b9 208 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
73c1f4a0
ACM		 209 r->idiag_timer = 4;
210 r->idiag_retrans = icsk->icsk_probes_out;
b7de529c
XL		 211 r->idiag_expires =
212 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
1da177e4 213 } else if (timer_pending(&sk->sk_timer)) {
73c1f4a0
ACM		 214 r->idiag_timer = 2;
215 r->idiag_retrans = icsk->icsk_probes_out;
b7de529c
XL		 216 r->idiag_expires =
217 jiffies_to_msecs(sk->sk_timer.expires - jiffies);
1da177e4 218 } else {
73c1f4a0
ACM		 219 r->idiag_timer = 0;
220 r->idiag_expires = 0;
1da177e4 221 }
540722ff 222
3fd22af8 223 if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
6ed46d12
ND		 224 attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
225 handler->idiag_info_size,
226 INET_DIAG_PAD);
6e277ed5
TG		 227 if (!attr)
228 goto errout;
3c4d05c8 229
6e277ed5 230 info = nla_data(attr);
1da177e4
LT		 231 }
232
521f1cf1
ED		 233 if (ext & (1 << (INET_DIAG_CONG - 1))) {
234 int err = 0;
235
236 rcu_read_lock();
237 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
238 if (ca_ops)
239 err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name);
240 rcu_read_unlock();
241 if (err < 0)
6e277ed5 242 goto errout;
521f1cf1 243 }
6e277ed5 244
4f5736c4 245 handler->idiag_get_info(sk, r, info);
1da177e4 246
521f1cf1 247 if (sk->sk_state < TCP_TIME_WAIT) {
64f40ff5
ED		 248 union tcp_cc_info info;
249 size_t sz = 0;
250 int attr;
521f1cf1
ED		 251
252 rcu_read_lock();
253 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
254 if (ca_ops && ca_ops->get_info)
64f40ff5 255 sz = ca_ops->get_info(sk, ext, &attr, &info);
521f1cf1 256 rcu_read_unlock();
64f40ff5 257 if (sz && nla_put(skb, attr, sz, &info) < 0)
521f1cf1
ED		 258 goto errout;
259 }
1da177e4 260
3c4d05c8 261out:
053c095a
JB		 262 nlmsg_end(skb, nlh);
263 return 0;
1da177e4 264
6e277ed5
TG		 265errout:
266 nlmsg_cancel(skb, nlh);
26932566 267 return -EMSGSIZE;
1da177e4 268}
3c4d05c8
PE		 269EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
270
271static int inet_csk_diag_fill(struct sock *sk,
e31c5e0e 272 struct sk_buff *skb,
34160ea3 273 const struct inet_diag_req_v2 *req,
d06ca956 274 struct user_namespace *user_ns,
15e47304 275 u32 portid, u32 seq, u16 nlmsg_flags,
3c4d05c8
PE		 276 const struct nlmsghdr *unlh)
277{
e31c5e0e
ED		 278 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req,
279 user_ns, portid, seq, nlmsg_flags, unlh);
3c4d05c8 280}
1da177e4 281
33cf7c90 282static int inet_twsk_diag_fill(struct sock *sk,
e31c5e0e 283 struct sk_buff *skb,
15e47304 284 u32 portid, u32 seq, u16 nlmsg_flags,
c7d58aab
ACM		 285 const struct nlmsghdr *unlh)
286{
33cf7c90 287 struct inet_timewait_sock *tw = inet_twsk(sk);
c7d58aab 288 struct inet_diag_msg *r;
6e277ed5 289 struct nlmsghdr *nlh;
789f558c 290 long tmo;
d106352d 291
15e47304 292 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
6e277ed5
TG		 293 nlmsg_flags);
294 if (!nlh)
d106352d 295 return -EMSGSIZE;
c7d58aab 296
d106352d 297 r = nlmsg_data(nlh);
c7d58aab
ACM		 298 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
299
789f558c 300 tmo = tw->tw_timer.expires - jiffies;
c7d58aab
ACM		 301 if (tmo < 0)
302 tmo = 0;
303
a4458343 304 inet_diag_msg_common_fill(r, sk);
c7d58aab 305 r->idiag_retrans = 0;
b1aac815 306
c7d58aab
ACM		 307 r->idiag_state = tw->tw_substate;
308 r->idiag_timer = 3;
96f817fe 309 r->idiag_expires = jiffies_to_msecs(tmo);
c7d58aab
ACM		 310 r->idiag_rqueue = 0;
311 r->idiag_wqueue = 0;
312 r->idiag_uid = 0;
313 r->idiag_inode = 0;
6e277ed5 314
053c095a
JB		 315 nlmsg_end(skb, nlh);
316 return 0;
c7d58aab
ACM		 317}
318
a58917f5
ED		 319static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb,
320 u32 portid, u32 seq, u16 nlmsg_flags,
321 const struct nlmsghdr *unlh)
322{
323 struct inet_diag_msg *r;
324 struct nlmsghdr *nlh;
325 long tmo;
326
327 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
328 nlmsg_flags);
329 if (!nlh)
330 return -EMSGSIZE;
331
332 r = nlmsg_data(nlh);
333 inet_diag_msg_common_fill(r, sk);
334 r->idiag_state = TCP_SYN_RECV;
335 r->idiag_timer = 1;
336 r->idiag_retrans = inet_reqsk(sk)->num_retrans;
337
338 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
339 offsetof(struct sock, sk_cookie));
340
fa76ce73 341 tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies;
a58917f5
ED		 342 r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0;
343 r->idiag_rqueue = 0;
344 r->idiag_wqueue = 0;
345 r->idiag_uid = 0;
346 r->idiag_inode = 0;
347
348 nlmsg_end(skb, nlh);
349 return 0;
350}
351
dff2c035 352static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
34160ea3 353 const struct inet_diag_req_v2 *r,
d06ca956 354 struct user_namespace *user_ns,
15e47304 355 u32 portid, u32 seq, u16 nlmsg_flags,
dff2c035
ACM		 356 const struct nlmsghdr *unlh)
357{
358 if (sk->sk_state == TCP_TIME_WAIT)
a58917f5 359 return inet_twsk_diag_fill(sk, skb, portid, seq,
efe4208f
ED		 360 nlmsg_flags, unlh);
361
a58917f5
ED		 362 if (sk->sk_state == TCP_NEW_SYN_RECV)
363 return inet_req_diag_fill(sk, skb, portid, seq,
364 nlmsg_flags, unlh);
365
efe4208f
ED		 366 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
367 nlmsg_flags, unlh);
dff2c035
ACM		 368}
369
b613f56e
LC		 370struct sock *inet_diag_find_one_icsk(struct net *net,
371 struct inet_hashinfo *hashinfo,
372 const struct inet_diag_req_v2 *req)
1da177e4 373{
e31c5e0e 374 struct sock *sk;
d523a328 375
2d331915 376 rcu_read_lock();
e31c5e0e 377 if (req->sdiag_family == AF_INET)
a583636a 378 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0],
73c1f4a0
ACM		 379 req->id.idiag_dport, req->id.idiag_src[0],
380 req->id.idiag_sport, req->id.idiag_if);
dfd56b8b 381#if IS_ENABLED(CONFIG_IPV6)
7c130672
ED		 382 else if (req->sdiag_family == AF_INET6) {
383 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
384 ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
a583636a 385 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3],
7c130672
ED		 386 req->id.idiag_dport, req->id.idiag_src[3],
387 req->id.idiag_sport, req->id.idiag_if);
388 else
a583636a 389 sk = inet6_lookup(net, hashinfo, NULL, 0,
7c130672
ED		 390 (struct in6_addr *)req->id.idiag_dst,
391 req->id.idiag_dport,
392 (struct in6_addr *)req->id.idiag_src,
393 req->id.idiag_sport,
394 req->id.idiag_if);
395 }
1da177e4 396#endif
2d331915
ED		 397 else {
398 rcu_read_unlock();
b613f56e 399 return ERR_PTR(-EINVAL);
2d331915
ED		 400 }
401 rcu_read_unlock();
e31c5e0e 402 if (!sk)
b613f56e 403 return ERR_PTR(-ENOENT);
1da177e4 404
b613f56e
LC		 405 if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
406 sock_gen_put(sk);
407 return ERR_PTR(-ENOENT);
408 }
409
410 return sk;
411}
412EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
413
414int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
415 struct sk_buff *in_skb,
416 const struct nlmsghdr *nlh,
417 const struct inet_diag_req_v2 *req)
418{
419 struct net *net = sock_net(in_skb->sk);
420 struct sk_buff *rep;
421 struct sock *sk;
422 int err;
423
424 sk = inet_diag_find_one_icsk(net, hashinfo, req);
425 if (IS_ERR(sk))
426 return PTR_ERR(sk);
1da177e4 427
c8e2c80d 428 rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
6e277ed5
TG		 429 if (!rep) {
430 err = -ENOMEM;
1da177e4 431 goto out;
6e277ed5 432 }
1da177e4 433
a029fe26 434 err = sk_diag_fill(sk, rep, req,
e32123e5 435 sk_user_ns(NETLINK_CB(in_skb).sk),
15e47304 436 NETLINK_CB(in_skb).portid,
26932566
PM		 437 nlh->nlmsg_seq, 0, nlh);
438 if (err < 0) {
439 WARN_ON(err == -EMSGSIZE);
6e277ed5 440 nlmsg_free(rep);
26932566
PM		 441 goto out;
442 }
15e47304 443 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
73c1f4a0 444 MSG_DONTWAIT);
1da177e4
LT		 445 if (err > 0)
446 err = 0;
447
448out:
c1d607cc
ED		 449 if (sk)
450 sock_gen_put(sk);
451
476f7dbf
PE		 452 return err;
453}
1942c518 454EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
476f7dbf 455
6eb5d2e0 456static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
476f7dbf 457 const struct nlmsghdr *nlh,
34160ea3 458 const struct inet_diag_req_v2 *req)
476f7dbf
PE		 459{
460 const struct inet_diag_handler *handler;
461 int err;
462
463 handler = inet_diag_lock_handler(req->sdiag_protocol);
464 if (IS_ERR(handler))
465 err = PTR_ERR(handler);
6eb5d2e0 466 else if (cmd == SOCK_DIAG_BY_FAMILY)
1942c518 467 err = handler->dump_one(in_skb, nlh, req);
6eb5d2e0
LC		 468 else if (cmd == SOCK_DESTROY && handler->destroy)
469 err = handler->destroy(in_skb, req);
470 else
471 err = -EOPNOTSUPP;
d523a328 472 inet_diag_unlock_handler(handler);
476f7dbf 473
1da177e4
LT		 474 return err;
475}
476
9f855299 477static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
1da177e4
LT		 478{
479 int words = bits >> 5;
480
481 bits &= 0x1f;
482
483 if (words) {
484 if (memcmp(a1, a2, words << 2))
485 return 0;
486 }
487 if (bits) {
9f855299
AV		 488 __be32 w1, w2;
489 __be32 mask;
1da177e4
LT		 490
491 w1 = a1[words];
492 w2 = a2[words];
493
494 mask = htonl((0xffffffff) << (32 - bits));
495
496 if ((w1 ^ w2) & mask)
497 return 0;
498 }
499
500 return 1;
501}
502
87c22ea5 503static int inet_diag_bc_run(const struct nlattr *_bc,
e31c5e0e 504 const struct inet_diag_entry *entry)
1da177e4 505{
87c22ea5
PE		 506 const void *bc = nla_data(_bc);
507 int len = nla_len(_bc);
508
1da177e4
LT		 509 while (len > 0) {
510 int yes = 1;
73c1f4a0 511 const struct inet_diag_bc_op *op = bc;
1da177e4
LT		 512
513 switch (op->code) {
73c1f4a0 514 case INET_DIAG_BC_NOP:
1da177e4 515 break;
73c1f4a0 516 case INET_DIAG_BC_JMP:
1da177e4
LT		 517 yes = 0;
518 break;
73c1f4a0 519 case INET_DIAG_BC_S_GE:
1da177e4
LT		 520 yes = entry->sport >= op[1].no;
521 break;
73c1f4a0 522 case INET_DIAG_BC_S_LE:
b4ced2b7 523 yes = entry->sport <= op[1].no;
1da177e4 524 break;
73c1f4a0 525 case INET_DIAG_BC_D_GE:
1da177e4
LT		 526 yes = entry->dport >= op[1].no;
527 break;
73c1f4a0 528 case INET_DIAG_BC_D_LE:
1da177e4
LT		 529 yes = entry->dport <= op[1].no;
530 break;
73c1f4a0 531 case INET_DIAG_BC_AUTO:
1da177e4
LT		 532 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
533 break;
73c1f4a0 534 case INET_DIAG_BC_S_COND:
a8c2190e 535 case INET_DIAG_BC_D_COND: {
e31c5e0e
ED		 536 const struct inet_diag_hostcond *cond;
537 const __be32 *addr;
1da177e4 538
e31c5e0e 539 cond = (const struct inet_diag_hostcond *)(op + 1);
1da177e4 540 if (cond->port != -1 &&
73c1f4a0 541 cond->port != (op->code == INET_DIAG_BC_S_COND ?
1da177e4
LT		 542 entry->sport : entry->dport)) {
543 yes = 0;
544 break;
545 }
4e852c02 546
73c1f4a0 547 if (op->code == INET_DIAG_BC_S_COND)
1da177e4
LT		 548 addr = entry->saddr;
549 else
550 addr = entry->daddr;
551
f67caec9
NC		 552 if (cond->family != AF_UNSPEC &&
553 cond->family != entry->family) {
554 if (entry->family == AF_INET6 &&
555 cond->family == AF_INET) {
556 if (addr[0] == 0 && addr[1] == 0 &&
557 addr[2] == htonl(0xffff) &&
558 bitstring_match(addr + 3,
559 cond->addr,
560 cond->prefix_len))
561 break;
562 }
563 yes = 0;
564 break;
565 }
566
567 if (cond->prefix_len == 0)
568 break;
4e852c02
ACM		 569 if (bitstring_match(addr, cond->addr,
570 cond->prefix_len))
1da177e4 571 break;
1da177e4
LT		 572 yes = 0;
573 break;
574 }
637c841d
DA		 575 case INET_DIAG_BC_DEV_COND: {
576 u32 ifindex;
577
578 ifindex = *((const u32 *)(op + 1));
579 if (ifindex != entry->ifindex)
580 yes = 0;
581 break;
582 }
1da177e4
LT		 583 }
584
4e852c02 585 if (yes) {
1da177e4
LT		 586 len -= op->yes;
587 bc += op->yes;
588 } else {
589 len -= op->no;
590 bc += op->no;
591 }
592 }
a02cec21 593 return len == 0;
1da177e4
LT		 594}
595
a4458343
ED		 596/* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
597 */
598static void entry_fill_addrs(struct inet_diag_entry *entry,
599 const struct sock *sk)
600{
601#if IS_ENABLED(CONFIG_IPV6)
602 if (sk->sk_family == AF_INET6) {
603 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32;
604 entry->daddr = sk->sk_v6_daddr.s6_addr32;
605 } else
606#endif
607 {
608 entry->saddr = &sk->sk_rcv_saddr;
609 entry->daddr = &sk->sk_daddr;
610 }
611}
612
8d07d151
PE		 613int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
614{
8d07d151 615 struct inet_sock *inet = inet_sk(sk);
e31c5e0e 616 struct inet_diag_entry entry;
8d07d151 617
e31c5e0e 618 if (!bc)
8d07d151
PE		 619 return 1;
620
621 entry.family = sk->sk_family;
a4458343 622 entry_fill_addrs(&entry, sk);
8d07d151
PE		 623 entry.sport = inet->inet_num;
624 entry.dport = ntohs(inet->inet_dport);
637c841d 625 entry.ifindex = sk->sk_bound_dev_if;
a58917f5 626 entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0;
8d07d151
PE		 627
628 return inet_diag_bc_run(bc, &entry);
629}
630EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
631
1da177e4
LT		 632static int valid_cc(const void *bc, int len, int cc)
633{
634 while (len >= 0) {
73c1f4a0 635 const struct inet_diag_bc_op *op = bc;
1da177e4
LT		 636
637 if (cc > len)
638 return 0;
639 if (cc == len)
640 return 1;
eeb14972 641 if (op->yes < 4 || op->yes & 3)
1da177e4
LT		 642 return 0;
643 len -= op->yes;
644 bc += op->yes;
645 }
646 return 0;
647}
648
637c841d
DA		 649/* data is u32 ifindex */
650static bool valid_devcond(const struct inet_diag_bc_op *op, int len,
651 int *min_len)
652{
653 /* Check ifindex space. */
654 *min_len += sizeof(u32);
655 if (len < *min_len)
656 return false;
657
658 return true;
659}
405c0059
NC		 660/* Validate an inet_diag_hostcond. */
661static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
662 int *min_len)
663{
405c0059 664 struct inet_diag_hostcond *cond;
e31c5e0e 665 int addr_len;
405c0059
NC		 666
667 /* Check hostcond space. */
668 *min_len += sizeof(struct inet_diag_hostcond);
669 if (len < *min_len)
670 return false;
671 cond = (struct inet_diag_hostcond *)(op + 1);
672
673 /* Check address family and address length. */
674 switch (cond->family) {
675 case AF_UNSPEC:
676 addr_len = 0;
677 break;
678 case AF_INET:
679 addr_len = sizeof(struct in_addr);
680 break;
681 case AF_INET6:
682 addr_len = sizeof(struct in6_addr);
683 break;
684 default:
685 return false;
686 }
687 *min_len += addr_len;
688 if (len < *min_len)
689 return false;
690
691 /* Check prefix length (in bits) vs address length (in bytes). */
692 if (cond->prefix_len > 8 * addr_len)
693 return false;
694
695 return true;
696}
697
5e1f5420 698/* Validate a port comparison operator. */
e31c5e0e
ED		 699static bool valid_port_comparison(const struct inet_diag_bc_op *op,
700 int len, int *min_len)
5e1f5420
NC		 701{
702 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
703 *min_len += sizeof(struct inet_diag_bc_op);
704 if (len < *min_len)
705 return false;
706 return true;
707}
708
73c1f4a0 709static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
1da177e4 710{
eeb14972 711 const void *bc = bytecode;
1da177e4
LT		 712 int len = bytecode_len;
713
714 while (len > 0) {
405c0059 715 int min_len = sizeof(struct inet_diag_bc_op);
e31c5e0e 716 const struct inet_diag_bc_op *op = bc;
1da177e4 717
1da177e4 718 switch (op->code) {
73c1f4a0
ACM		 719 case INET_DIAG_BC_S_COND:
720 case INET_DIAG_BC_D_COND:
405c0059
NC		 721 if (!valid_hostcond(bc, len, &min_len))
722 return -EINVAL;
5e1f5420 723 break;
637c841d
DA		 724 case INET_DIAG_BC_DEV_COND:
725 if (!valid_devcond(bc, len, &min_len))
726 return -EINVAL;
727 break;
73c1f4a0
ACM		 728 case INET_DIAG_BC_S_GE:
729 case INET_DIAG_BC_S_LE:
730 case INET_DIAG_BC_D_GE:
731 case INET_DIAG_BC_D_LE:
5e1f5420 732 if (!valid_port_comparison(bc, len, &min_len))
1da177e4
LT		 733 return -EINVAL;
734 break;
5e1f5420
NC		 735 case INET_DIAG_BC_AUTO:
736 case INET_DIAG_BC_JMP:
73c1f4a0 737 case INET_DIAG_BC_NOP:
1da177e4
LT		 738 break;
739 default:
740 return -EINVAL;
741 }
5e1f5420
NC		 742
743 if (op->code != INET_DIAG_BC_NOP) {
744 if (op->no < min_len || op->no > len + 4 || op->no & 3)
745 return -EINVAL;
746 if (op->no < len &&
747 !valid_cc(bytecode, bytecode_len, len - op->no))
748 return -EINVAL;
749 }
750
405c0059 751 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
eeb14972 752 return -EINVAL;
4e852c02 753 bc += op->yes;
1da177e4
LT		 754 len -= op->yes;
755 }
756 return len == 0 ? 0 : -EINVAL;
757}
758
dff2c035
ACM		 759static int inet_csk_diag_dump(struct sock *sk,
760 struct sk_buff *skb,
37f352b5 761 struct netlink_callback *cb,
34160ea3 762 const struct inet_diag_req_v2 *r,
37f352b5 763 const struct nlattr *bc)
1da177e4 764{
8d07d151
PE		 765 if (!inet_diag_bc_sk(bc, sk))
766 return 0;
1da177e4 767
a029fe26 768 return inet_csk_diag_fill(sk, skb, r,
e32123e5 769 sk_user_ns(NETLINK_CB(cb->skb).sk),
15e47304 770 NETLINK_CB(cb->skb).portid,
dff2c035 771 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
1da177e4
LT		 772}
773
49612729
ED		 774static void twsk_build_assert(void)
775{
776 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
777 offsetof(struct sock, sk_family));
778
779 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
780 offsetof(struct inet_sock, inet_num));
781
782 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
783 offsetof(struct inet_sock, inet_dport));
784
785 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
786 offsetof(struct inet_sock, inet_rcv_saddr));
787
788 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
789 offsetof(struct inet_sock, inet_daddr));
790
791#if IS_ENABLED(CONFIG_IPV6)
792 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
793 offsetof(struct sock, sk_v6_rcv_saddr));
794
795 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
796 offsetof(struct sock, sk_v6_daddr));
797#endif
798}
799
1942c518 800void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
e31c5e0e 801 struct netlink_callback *cb,
34160ea3 802 const struct inet_diag_req_v2 *r, struct nlattr *bc)
1da177e4 803{
51d7cccf 804 struct net *net = sock_net(skb->sk);
e31c5e0e 805 int i, num, s_i, s_num;
079096f1 806 u32 idiag_states = r->idiag_states;
4e852c02 807
079096f1
ED		 808 if (idiag_states & TCPF_SYN_RECV)
809 idiag_states |= TCPF_NEW_SYN_RECV;
1da177e4
LT		 810 s_i = cb->args[1];
811 s_num = num = cb->args[2];
4f5736c4 812
1da177e4 813 if (cb->args[0] == 0) {
079096f1 814 if (!(idiag_states & TCPF_LISTEN))
1da177e4 815 goto skip_listen_ht;
540722ff 816
0f7ff927 817 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
5caea4ea 818 struct inet_listen_hashbucket *ilb;
e31c5e0e 819 struct sock *sk;
1da177e4
LT		 820
821 num = 0;
5caea4ea
ED		 822 ilb = &hashinfo->listening_hash[i];
823 spin_lock_bh(&ilb->lock);
3b24d854 824 sk_for_each(sk, &ilb->head) {
1da177e4
LT		 825 struct inet_sock *inet = inet_sk(sk);
826
51d7cccf
AV		 827 if (!net_eq(sock_net(sk), net))
828 continue;
829
1da177e4
LT		 830 if (num < s_num) {
831 num++;
832 continue;
833 }
834
d23deaa0 835 if (r->sdiag_family != AF_UNSPEC &&
e31c5e0e 836 sk->sk_family != r->sdiag_family)
d23deaa0
PE		 837 goto next_listen;
838
c720c7e8 839 if (r->id.idiag_sport != inet->inet_sport &&
73c1f4a0 840 r->id.idiag_sport)
1da177e4
LT		 841 goto next_listen;
842
079096f1 843 if (r->id.idiag_dport ||
1da177e4 844 cb->args[3] > 0)
1da177e4
LT		 845 goto next_listen;
846
079096f1 847 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
5caea4ea 848 spin_unlock_bh(&ilb->lock);
1da177e4
LT		 849 goto done;
850 }
851
852next_listen:
853 cb->args[3] = 0;
854 cb->args[4] = 0;
855 ++num;
856 }
5caea4ea 857 spin_unlock_bh(&ilb->lock);
1da177e4
LT		 858
859 s_num = 0;
860 cb->args[3] = 0;
861 cb->args[4] = 0;
862 }
1da177e4
LT		 863skip_listen_ht:
864 cb->args[0] = 1;
865 s_i = num = s_num = 0;
866 }
867
079096f1 868 if (!(idiag_states & ~TCPF_LISTEN))
efb3cb42 869 goto out;
1da177e4 870
f373b53b 871 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
540722ff 872 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
7e3aab4a 873 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
3ab5aee7 874 struct hlist_nulls_node *node;
e31c5e0e 875 struct sock *sk;
1da177e4 876
6be547a6
AK		 877 num = 0;
878
05dbc7b5 879 if (hlist_nulls_empty(&head->chain))
6be547a6
AK		 880 continue;
881
1da177e4
LT		 882 if (i > s_i)
883 s_num = 0;
884
7e3aab4a 885 spin_lock_bh(lock);
3ab5aee7 886 sk_nulls_for_each(sk, node, &head->chain) {
e31c5e0e 887 int state, res;
1da177e4 888
51d7cccf
AV		 889 if (!net_eq(sock_net(sk), net))
890 continue;
1da177e4
LT		 891 if (num < s_num)
892 goto next_normal;
70315d22
NC		 893 state = (sk->sk_state == TCP_TIME_WAIT) ?
894 inet_twsk(sk)->tw_substate : sk->sk_state;
079096f1 895 if (!(idiag_states & (1 << state)))
1da177e4 896 goto next_normal;
d23deaa0 897 if (r->sdiag_family != AF_UNSPEC &&
05dbc7b5 898 sk->sk_family != r->sdiag_family)
d23deaa0 899 goto next_normal;
05dbc7b5 900 if (r->id.idiag_sport != htons(sk->sk_num) &&
73c1f4a0 901 r->id.idiag_sport)
1da177e4 902 goto next_normal;
05dbc7b5 903 if (r->id.idiag_dport != sk->sk_dport &&
4e852c02 904 r->id.idiag_dport)
1da177e4 905 goto next_normal;
a58917f5
ED		 906 twsk_build_assert();
907
908 if (!inet_diag_bc_sk(bc, sk))
909 goto next_normal;
910
911 res = sk_diag_fill(sk, skb, r,
912 sk_user_ns(NETLINK_CB(cb->skb).sk),
913 NETLINK_CB(cb->skb).portid,
914 cb->nlh->nlmsg_seq, NLM_F_MULTI,
915 cb->nlh);
05dbc7b5 916 if (res < 0) {
7e3aab4a 917 spin_unlock_bh(lock);
1da177e4
LT		 918 goto done;
919 }
920next_normal:
921 ++num;
922 }
923
7e3aab4a 924 spin_unlock_bh(lock);
acffb584 925 cond_resched();
1da177e4
LT		 926 }
927
928done:
929 cb->args[1] = i;
930 cb->args[2] = num;
efb3cb42
PE		 931out:
932 ;
933}
1942c518 934EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
efb3cb42
PE		 935
936static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
34160ea3 937 const struct inet_diag_req_v2 *r,
e31c5e0e 938 struct nlattr *bc)
efb3cb42
PE		 939{
940 const struct inet_diag_handler *handler;
cacb6ba0 941 int err = 0;
efb3cb42
PE		 942
943 handler = inet_diag_lock_handler(r->sdiag_protocol);
944 if (!IS_ERR(handler))
1942c518 945 handler->dump(skb, cb, r, bc);
cacb6ba0
CG		 946 else
947 err = PTR_ERR(handler);
d523a328 948 inet_diag_unlock_handler(handler);
efb3cb42 949
cacb6ba0 950 return err ? : skb->len;
1da177e4
LT		 951}
952
25c4cd2b
PE		 953static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
954{
c8991362 955 int hdrlen = sizeof(struct inet_diag_req_v2);
e31c5e0e 956 struct nlattr *bc = NULL;
25c4cd2b
PE		 957
958 if (nlmsg_attrlen(cb->nlh, hdrlen))
959 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
960
d106352d 961 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
25c4cd2b
PE		 962}
963
e31c5e0e 964static int inet_diag_type2proto(int type)
a029fe26
PE		 965{
966 switch (type) {
967 case TCPDIAG_GETSOCK:
968 return IPPROTO_TCP;
969 case DCCPDIAG_GETSOCK:
970 return IPPROTO_DCCP;
971 default:
972 return 0;
973 }
974}
975
e31c5e0e
ED		 976static int inet_diag_dump_compat(struct sk_buff *skb,
977 struct netlink_callback *cb)
25c4cd2b 978{
d106352d 979 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
e31c5e0e 980 int hdrlen = sizeof(struct inet_diag_req);
c8991362 981 struct inet_diag_req_v2 req;
25c4cd2b 982 struct nlattr *bc = NULL;
25c4cd2b 983
d23deaa0 984 req.sdiag_family = AF_UNSPEC; /* compatibility */
25c4cd2b
PE		 985 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
986 req.idiag_ext = rc->idiag_ext;
987 req.idiag_states = rc->idiag_states;
988 req.id = rc->id;
989
990 if (nlmsg_attrlen(cb->nlh, hdrlen))
991 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
992
993 return __inet_diag_dump(skb, cb, &req, bc);
994}
995
fe50ce28 996static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
e31c5e0e 997 const struct nlmsghdr *nlh)
fe50ce28 998{
d106352d 999 struct inet_diag_req *rc = nlmsg_data(nlh);
c8991362 1000 struct inet_diag_req_v2 req;
fe50ce28
PE		 1001
1002 req.sdiag_family = rc->idiag_family;
1003 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1004 req.idiag_ext = rc->idiag_ext;
1005 req.idiag_states = rc->idiag_states;
1006 req.id = rc->id;
1007
6eb5d2e0 1008 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
fe50ce28
PE		 1009}
1010
8d34172d 1011static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 1012{
3b09c84c 1013 int hdrlen = sizeof(struct inet_diag_req);
51d7cccf 1014 struct net *net = sock_net(skb->sk);
1da177e4 1015
ead592ba
TG		 1016 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1017 nlmsg_len(nlh) < hdrlen)
1018 return -EINVAL;
1da177e4 1019
b8f3ab42 1020 if (nlh->nlmsg_flags & NLM_F_DUMP) {
ead592ba
TG		 1021 if (nlmsg_attrlen(nlh, hdrlen)) {
1022 struct nlattr *attr;
1da177e4 1023
ead592ba
TG		 1024 attr = nlmsg_find_attr(nlh, hdrlen,
1025 INET_DIAG_REQ_BYTECODE);
e31c5e0e 1026 if (!attr ||
ead592ba
TG		 1027 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1028 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1029 return -EINVAL;
1030 }
80d326fa
PNA		 1031 {
1032 struct netlink_dump_control c = {
1033 .dump = inet_diag_dump_compat,
1034 };
51d7cccf 1035 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
80d326fa 1036 }
1da177e4 1037 }
ead592ba 1038
fe50ce28 1039 return inet_diag_get_exact_compat(skb, nlh);
1da177e4
LT		 1040}
1041
6eb5d2e0 1042static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
d366477a 1043{
c8991362 1044 int hdrlen = sizeof(struct inet_diag_req_v2);
51d7cccf 1045 struct net *net = sock_net(skb->sk);
d366477a
PE		 1046
1047 if (nlmsg_len(h) < hdrlen)
1048 return -EINVAL;
1049
6eb5d2e0
LC		 1050 if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
1051 h->nlmsg_flags & NLM_F_DUMP) {
25c4cd2b
PE		 1052 if (nlmsg_attrlen(h, hdrlen)) {
1053 struct nlattr *attr;
e31c5e0e 1054
25c4cd2b
PE		 1055 attr = nlmsg_find_attr(h, hdrlen,
1056 INET_DIAG_REQ_BYTECODE);
e31c5e0e 1057 if (!attr ||
25c4cd2b
PE		 1058 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1059 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1060 return -EINVAL;
1061 }
80d326fa
PNA		 1062 {
1063 struct netlink_dump_control c = {
1064 .dump = inet_diag_dump,
1065 };
51d7cccf 1066 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
80d326fa 1067 }
d366477a
PE		 1068 }
1069
6eb5d2e0 1070 return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
d366477a
PE		 1071}
1072
35ac838a
CG		 1073static
1074int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
1075{
1076 const struct inet_diag_handler *handler;
1077 struct nlmsghdr *nlh;
1078 struct nlattr *attr;
1079 struct inet_diag_msg *r;
1080 void *info = NULL;
1081 int err = 0;
1082
1083 nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0);
1084 if (!nlh)
1085 return -ENOMEM;
1086
1087 r = nlmsg_data(nlh);
1088 memset(r, 0, sizeof(*r));
1089 inet_diag_msg_common_fill(r, sk);
e0df02e0
CG		 1090 if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM)
1091 r->id.idiag_sport = inet_sk(sk)->inet_sport;
35ac838a
CG		 1092 r->idiag_state = sk->sk_state;
1093
1094 if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) {
1095 nlmsg_cancel(skb, nlh);
1096 return err;
1097 }
1098
1099 handler = inet_diag_lock_handler(sk->sk_protocol);
1100 if (IS_ERR(handler)) {
1101 inet_diag_unlock_handler(handler);
1102 nlmsg_cancel(skb, nlh);
1103 return PTR_ERR(handler);
1104 }
1105
1106 attr = handler->idiag_info_size
6ed46d12
ND		 1107 ? nla_reserve_64bit(skb, INET_DIAG_INFO,
1108 handler->idiag_info_size,
1109 INET_DIAG_PAD)
35ac838a
CG		 1110 : NULL;
1111 if (attr)
1112 info = nla_data(attr);
1113
1114 handler->idiag_get_info(sk, r, info);
1115 inet_diag_unlock_handler(handler);
1116
1117 nlmsg_end(skb, nlh);
1118 return 0;
1119}
1120
8dcf01fc 1121static const struct sock_diag_handler inet_diag_handler = {
d366477a 1122 .family = AF_INET,
6eb5d2e0 1123 .dump = inet_diag_handler_cmd,
35ac838a 1124 .get_info = inet_diag_handler_get_info,
6eb5d2e0 1125 .destroy = inet_diag_handler_cmd,
d366477a
PE		 1126};
1127
8dcf01fc 1128static const struct sock_diag_handler inet6_diag_handler = {
d366477a 1129 .family = AF_INET6,
6eb5d2e0 1130 .dump = inet_diag_handler_cmd,
35ac838a 1131 .get_info = inet_diag_handler_get_info,
6eb5d2e0 1132 .destroy = inet_diag_handler_cmd,
d366477a
PE		 1133};
1134
4f5736c4
ACM		 1135int inet_diag_register(const struct inet_diag_handler *h)
1136{
1137 const __u16 type = h->idiag_type;
1138 int err = -EINVAL;
1139
f13c95f0 1140 if (type >= IPPROTO_MAX)
4f5736c4
ACM		 1141 goto out;
1142
d523a328 1143 mutex_lock(&inet_diag_table_mutex);
4f5736c4 1144 err = -EEXIST;
e31c5e0e 1145 if (!inet_diag_table[type]) {
4f5736c4
ACM		 1146 inet_diag_table[type] = h;
1147 err = 0;
1148 }
d523a328 1149 mutex_unlock(&inet_diag_table_mutex);
4f5736c4
ACM		 1150out:
1151 return err;
1152}
1153EXPORT_SYMBOL_GPL(inet_diag_register);
1154
1155void inet_diag_unregister(const struct inet_diag_handler *h)
1156{
1157 const __u16 type = h->idiag_type;
1158
f13c95f0 1159 if (type >= IPPROTO_MAX)
4f5736c4
ACM		 1160 return;
1161
d523a328 1162 mutex_lock(&inet_diag_table_mutex);
4f5736c4 1163 inet_diag_table[type] = NULL;
d523a328 1164 mutex_unlock(&inet_diag_table_mutex);
4f5736c4
ACM		 1165}
1166EXPORT_SYMBOL_GPL(inet_diag_unregister);
1167
73c1f4a0 1168static int __init inet_diag_init(void)
1da177e4 1169{
f13c95f0 1170 const int inet_diag_table_size = (IPPROTO_MAX *
4f5736c4
ACM		 1171 sizeof(struct inet_diag_handler *));
1172 int err = -ENOMEM;
1173
0da974f4 1174 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
4f5736c4
ACM		 1175 if (!inet_diag_table)
1176 goto out;
1177
d366477a
PE		 1178 err = sock_diag_register(&inet_diag_handler);
1179 if (err)
1180 goto out_free_nl;
1181
1182 err = sock_diag_register(&inet6_diag_handler);
1183 if (err)
1184 goto out_free_inet;
1185
8ef874bf 1186 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
4f5736c4
ACM		 1187out:
1188 return err;
d366477a
PE		 1189
1190out_free_inet:
1191 sock_diag_unregister(&inet_diag_handler);
1192out_free_nl:
4f5736c4
ACM		 1193 kfree(inet_diag_table);
1194 goto out;
1da177e4
LT		 1195}
1196
73c1f4a0 1197static void __exit inet_diag_exit(void)
1da177e4 1198{
d366477a
PE		 1199 sock_diag_unregister(&inet6_diag_handler);
1200 sock_diag_unregister(&inet_diag_handler);
8ef874bf 1201 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
4f5736c4 1202 kfree(inet_diag_table);
1da177e4
LT		 1203}
1204
73c1f4a0
ACM		 1205module_init(inet_diag_init);
1206module_exit(inet_diag_exit);
1da177e4 1207MODULE_LICENSE("GPL");
aec8dc62
PE		 1208MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1209MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);
Linux kernel - Deliverables
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