projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: ethernet: xilinx: Enable emaclite for MIPS
[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;
a52e95ab 48 u32 mark;
1da177e4
LT		 49};
50
d523a328
HX		 51static DEFINE_MUTEX(inet_diag_table_mutex);
52
f13c95f0 53static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
d523a328 54{
f13c95f0 55 if (!inet_diag_table[proto])
aec8dc62
PE		 56 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
57 NETLINK_SOCK_DIAG, AF_INET, proto);
d523a328
HX		 58
59 mutex_lock(&inet_diag_table_mutex);
f13c95f0 60 if (!inet_diag_table[proto])
d523a328
HX		 61 return ERR_PTR(-ENOENT);
62
f13c95f0 63 return inet_diag_table[proto];
d523a328
HX		 64}
65
e31c5e0e 66static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
d523a328
HX		 67{
68 mutex_unlock(&inet_diag_table_mutex);
69}
70
cb2050a7 71void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk)
a4458343
ED		 72{
73 r->idiag_family = sk->sk_family;
74
75 r->id.idiag_sport = htons(sk->sk_num);
76 r->id.idiag_dport = sk->sk_dport;
77 r->id.idiag_if = sk->sk_bound_dev_if;
78 sock_diag_save_cookie(sk, r->id.idiag_cookie);
79
80#if IS_ENABLED(CONFIG_IPV6)
81 if (sk->sk_family == AF_INET6) {
82 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
83 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
84 } else
85#endif
86 {
87 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
88 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
89
90 r->id.idiag_src[0] = sk->sk_rcv_saddr;
91 r->id.idiag_dst[0] = sk->sk_daddr;
92 }
93}
cb2050a7 94EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill);
a4458343 95
c8e2c80d
ED		 96static size_t inet_sk_attr_size(void)
97{
98 return nla_total_size(sizeof(struct tcp_info))
99 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
100 + nla_total_size(1) /* INET_DIAG_TOS */
101 + nla_total_size(1) /* INET_DIAG_TCLASS */
102 + nla_total_size(sizeof(struct inet_diag_meminfo))
103 + nla_total_size(sizeof(struct inet_diag_msg))
104 + nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
105 + nla_total_size(TCP_CA_NAME_MAX)
106 + nla_total_size(sizeof(struct tcpvegas_info))
107 + 64;
108}
109
cb2050a7
XL		 110int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
111 struct inet_diag_msg *r, int ext,
112 struct user_namespace *user_ns)
113{
114 const struct inet_sock *inet = inet_sk(sk);
115
116 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
117 goto errout;
118
119 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
120 * hence this needs to be included regardless of socket family.
121 */
122 if (ext & (1 << (INET_DIAG_TOS - 1)))
123 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
124 goto errout;
125
126#if IS_ENABLED(CONFIG_IPV6)
127 if (r->idiag_family == AF_INET6) {
128 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
129 if (nla_put_u8(skb, INET_DIAG_TCLASS,
130 inet6_sk(sk)->tclass) < 0)
131 goto errout;
132
133 if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
134 nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
135 goto errout;
136 }
137#endif
138
139 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
140 r->idiag_inode = sock_i_ino(sk);
141
142 return 0;
143errout:
144 return 1;
145}
146EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill);
147
3c4d05c8 148int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
34160ea3 149 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
e31c5e0e
ED		 150 struct user_namespace *user_ns,
151 u32 portid, u32 seq, u16 nlmsg_flags,
152 const struct nlmsghdr *unlh)
1da177e4 153{
521f1cf1 154 const struct tcp_congestion_ops *ca_ops;
e31c5e0e
ED		 155 const struct inet_diag_handler *handler;
156 int ext = req->idiag_ext;
73c1f4a0 157 struct inet_diag_msg *r;
1da177e4 158 struct nlmsghdr *nlh;
6e277ed5 159 struct nlattr *attr;
4f5736c4 160 void *info = NULL;
4f5736c4 161
a029fe26 162 handler = inet_diag_table[req->sdiag_protocol];
e31c5e0e 163 BUG_ON(!handler);
1da177e4 164
15e47304 165 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
6e277ed5
TG		 166 nlmsg_flags);
167 if (!nlh)
d106352d 168 return -EMSGSIZE;
4f5736c4 169
d106352d 170 r = nlmsg_data(nlh);
a58917f5 171 BUG_ON(!sk_fullsock(sk));
c7d58aab 172
a4458343 173 inet_diag_msg_common_fill(r, sk);
73c1f4a0
ACM		 174 r->idiag_state = sk->sk_state;
175 r->idiag_timer = 0;
176 r->idiag_retrans = 0;
1da177e4 177
cb2050a7 178 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns))
e4e541a8
PE		 179 goto errout;
180
6e277ed5
TG		 181 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
182 struct inet_diag_meminfo minfo = {
183 .idiag_rmem = sk_rmem_alloc_get(sk),
184 .idiag_wmem = sk->sk_wmem_queued,
185 .idiag_fmem = sk->sk_forward_alloc,
186 .idiag_tmem = sk_wmem_alloc_get(sk),
187 };
188
189 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
190 goto errout;
3c4d05c8
PE		 191 }
192
c0636faa
PE		 193 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
194 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
6e277ed5 195 goto errout;
c0636faa 196
e31c5e0e 197 if (!icsk) {
62ad6fcd 198 handler->idiag_get_info(sk, r, NULL);
3c4d05c8
PE		 199 goto out;
200 }
201
6ba8a3b1
ND		 202 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
203 icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
204 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
73c1f4a0
ACM		 205 r->idiag_timer = 1;
206 r->idiag_retrans = icsk->icsk_retransmits;
b7de529c
XL		 207 r->idiag_expires =
208 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
463c84b9 209 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
73c1f4a0
ACM		 210 r->idiag_timer = 4;
211 r->idiag_retrans = icsk->icsk_probes_out;
b7de529c
XL		 212 r->idiag_expires =
213 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
1da177e4 214 } else if (timer_pending(&sk->sk_timer)) {
73c1f4a0
ACM		 215 r->idiag_timer = 2;
216 r->idiag_retrans = icsk->icsk_probes_out;
b7de529c
XL		 217 r->idiag_expires =
218 jiffies_to_msecs(sk->sk_timer.expires - jiffies);
1da177e4 219 } else {
73c1f4a0
ACM		 220 r->idiag_timer = 0;
221 r->idiag_expires = 0;
1da177e4 222 }
540722ff 223
3fd22af8 224 if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
6ed46d12
ND		 225 attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
226 handler->idiag_info_size,
227 INET_DIAG_PAD);
6e277ed5
TG		 228 if (!attr)
229 goto errout;
3c4d05c8 230
6e277ed5 231 info = nla_data(attr);
1da177e4
LT		 232 }
233
521f1cf1
ED		 234 if (ext & (1 << (INET_DIAG_CONG - 1))) {
235 int err = 0;
236
237 rcu_read_lock();
238 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
239 if (ca_ops)
240 err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name);
241 rcu_read_unlock();
242 if (err < 0)
6e277ed5 243 goto errout;
521f1cf1 244 }
6e277ed5 245
4f5736c4 246 handler->idiag_get_info(sk, r, info);
1da177e4 247
521f1cf1 248 if (sk->sk_state < TCP_TIME_WAIT) {
64f40ff5
ED		 249 union tcp_cc_info info;
250 size_t sz = 0;
251 int attr;
521f1cf1
ED		 252
253 rcu_read_lock();
254 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
255 if (ca_ops && ca_ops->get_info)
64f40ff5 256 sz = ca_ops->get_info(sk, ext, &attr, &info);
521f1cf1 257 rcu_read_unlock();
64f40ff5 258 if (sz && nla_put(skb, attr, sz, &info) < 0)
521f1cf1
ED		 259 goto errout;
260 }
1da177e4 261
3c4d05c8 262out:
053c095a
JB		 263 nlmsg_end(skb, nlh);
264 return 0;
1da177e4 265
6e277ed5
TG		 266errout:
267 nlmsg_cancel(skb, nlh);
26932566 268 return -EMSGSIZE;
1da177e4 269}
3c4d05c8
PE		 270EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
271
272static int inet_csk_diag_fill(struct sock *sk,
e31c5e0e 273 struct sk_buff *skb,
34160ea3 274 const struct inet_diag_req_v2 *req,
d06ca956 275 struct user_namespace *user_ns,
15e47304 276 u32 portid, u32 seq, u16 nlmsg_flags,
3c4d05c8
PE		 277 const struct nlmsghdr *unlh)
278{
e31c5e0e
ED		 279 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req,
280 user_ns, portid, seq, nlmsg_flags, unlh);
3c4d05c8 281}
1da177e4 282
33cf7c90 283static int inet_twsk_diag_fill(struct sock *sk,
e31c5e0e 284 struct sk_buff *skb,
15e47304 285 u32 portid, u32 seq, u16 nlmsg_flags,
c7d58aab
ACM		 286 const struct nlmsghdr *unlh)
287{
33cf7c90 288 struct inet_timewait_sock *tw = inet_twsk(sk);
c7d58aab 289 struct inet_diag_msg *r;
6e277ed5 290 struct nlmsghdr *nlh;
789f558c 291 long tmo;
d106352d 292
15e47304 293 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
6e277ed5
TG		 294 nlmsg_flags);
295 if (!nlh)
d106352d 296 return -EMSGSIZE;
c7d58aab 297
d106352d 298 r = nlmsg_data(nlh);
c7d58aab
ACM		 299 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
300
789f558c 301 tmo = tw->tw_timer.expires - jiffies;
c7d58aab
ACM		 302 if (tmo < 0)
303 tmo = 0;
304
a4458343 305 inet_diag_msg_common_fill(r, sk);
c7d58aab 306 r->idiag_retrans = 0;
b1aac815 307
c7d58aab
ACM		 308 r->idiag_state = tw->tw_substate;
309 r->idiag_timer = 3;
96f817fe 310 r->idiag_expires = jiffies_to_msecs(tmo);
c7d58aab
ACM		 311 r->idiag_rqueue = 0;
312 r->idiag_wqueue = 0;
313 r->idiag_uid = 0;
314 r->idiag_inode = 0;
6e277ed5 315
053c095a
JB		 316 nlmsg_end(skb, nlh);
317 return 0;
c7d58aab
ACM		 318}
319
a58917f5
ED		 320static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb,
321 u32 portid, u32 seq, u16 nlmsg_flags,
322 const struct nlmsghdr *unlh)
323{
324 struct inet_diag_msg *r;
325 struct nlmsghdr *nlh;
326 long tmo;
327
328 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
329 nlmsg_flags);
330 if (!nlh)
331 return -EMSGSIZE;
332
333 r = nlmsg_data(nlh);
334 inet_diag_msg_common_fill(r, sk);
335 r->idiag_state = TCP_SYN_RECV;
336 r->idiag_timer = 1;
337 r->idiag_retrans = inet_reqsk(sk)->num_retrans;
338
339 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
340 offsetof(struct sock, sk_cookie));
341
fa76ce73 342 tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies;
a58917f5
ED		 343 r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0;
344 r->idiag_rqueue = 0;
345 r->idiag_wqueue = 0;
346 r->idiag_uid = 0;
347 r->idiag_inode = 0;
348
349 nlmsg_end(skb, nlh);
350 return 0;
351}
352
dff2c035 353static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
34160ea3 354 const struct inet_diag_req_v2 *r,
d06ca956 355 struct user_namespace *user_ns,
15e47304 356 u32 portid, u32 seq, u16 nlmsg_flags,
dff2c035
ACM		 357 const struct nlmsghdr *unlh)
358{
359 if (sk->sk_state == TCP_TIME_WAIT)
a58917f5 360 return inet_twsk_diag_fill(sk, skb, portid, seq,
efe4208f
ED		 361 nlmsg_flags, unlh);
362
a58917f5
ED		 363 if (sk->sk_state == TCP_NEW_SYN_RECV)
364 return inet_req_diag_fill(sk, skb, portid, seq,
365 nlmsg_flags, unlh);
366
efe4208f
ED		 367 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
368 nlmsg_flags, unlh);
dff2c035
ACM		 369}
370
b613f56e
LC		 371struct sock *inet_diag_find_one_icsk(struct net *net,
372 struct inet_hashinfo *hashinfo,
373 const struct inet_diag_req_v2 *req)
1da177e4 374{
e31c5e0e 375 struct sock *sk;
d523a328 376
2d331915 377 rcu_read_lock();
e31c5e0e 378 if (req->sdiag_family == AF_INET)
a583636a 379 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0],
73c1f4a0
ACM		 380 req->id.idiag_dport, req->id.idiag_src[0],
381 req->id.idiag_sport, req->id.idiag_if);
dfd56b8b 382#if IS_ENABLED(CONFIG_IPV6)
7c130672
ED		 383 else if (req->sdiag_family == AF_INET6) {
384 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
385 ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
a583636a 386 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3],
7c130672
ED		 387 req->id.idiag_dport, req->id.idiag_src[3],
388 req->id.idiag_sport, req->id.idiag_if);
389 else
a583636a 390 sk = inet6_lookup(net, hashinfo, NULL, 0,
7c130672
ED		 391 (struct in6_addr *)req->id.idiag_dst,
392 req->id.idiag_dport,
393 (struct in6_addr *)req->id.idiag_src,
394 req->id.idiag_sport,
395 req->id.idiag_if);
396 }
1da177e4 397#endif
2d331915
ED		 398 else {
399 rcu_read_unlock();
b613f56e 400 return ERR_PTR(-EINVAL);
2d331915
ED		 401 }
402 rcu_read_unlock();
e31c5e0e 403 if (!sk)
b613f56e 404 return ERR_PTR(-ENOENT);
1da177e4 405
b613f56e
LC		 406 if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
407 sock_gen_put(sk);
408 return ERR_PTR(-ENOENT);
409 }
410
411 return sk;
412}
413EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
414
415int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
416 struct sk_buff *in_skb,
417 const struct nlmsghdr *nlh,
418 const struct inet_diag_req_v2 *req)
419{
420 struct net *net = sock_net(in_skb->sk);
421 struct sk_buff *rep;
422 struct sock *sk;
423 int err;
424
425 sk = inet_diag_find_one_icsk(net, hashinfo, req);
426 if (IS_ERR(sk))
427 return PTR_ERR(sk);
1da177e4 428
c8e2c80d 429 rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
6e277ed5
TG		 430 if (!rep) {
431 err = -ENOMEM;
1da177e4 432 goto out;
6e277ed5 433 }
1da177e4 434
a029fe26 435 err = sk_diag_fill(sk, rep, req,
e32123e5 436 sk_user_ns(NETLINK_CB(in_skb).sk),
15e47304 437 NETLINK_CB(in_skb).portid,
26932566
PM		 438 nlh->nlmsg_seq, 0, nlh);
439 if (err < 0) {
440 WARN_ON(err == -EMSGSIZE);
6e277ed5 441 nlmsg_free(rep);
26932566
PM		 442 goto out;
443 }
15e47304 444 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
73c1f4a0 445 MSG_DONTWAIT);
1da177e4
LT		 446 if (err > 0)
447 err = 0;
448
449out:
c1d607cc
ED		 450 if (sk)
451 sock_gen_put(sk);
452
476f7dbf
PE		 453 return err;
454}
1942c518 455EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
476f7dbf 456
6eb5d2e0 457static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
476f7dbf 458 const struct nlmsghdr *nlh,
34160ea3 459 const struct inet_diag_req_v2 *req)
476f7dbf
PE		 460{
461 const struct inet_diag_handler *handler;
462 int err;
463
464 handler = inet_diag_lock_handler(req->sdiag_protocol);
465 if (IS_ERR(handler))
466 err = PTR_ERR(handler);
6eb5d2e0 467 else if (cmd == SOCK_DIAG_BY_FAMILY)
1942c518 468 err = handler->dump_one(in_skb, nlh, req);
6eb5d2e0
LC		 469 else if (cmd == SOCK_DESTROY && handler->destroy)
470 err = handler->destroy(in_skb, req);
471 else
472 err = -EOPNOTSUPP;
d523a328 473 inet_diag_unlock_handler(handler);
476f7dbf 474
1da177e4
LT		 475 return err;
476}
477
9f855299 478static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
1da177e4
LT		 479{
480 int words = bits >> 5;
481
482 bits &= 0x1f;
483
484 if (words) {
485 if (memcmp(a1, a2, words << 2))
486 return 0;
487 }
488 if (bits) {
9f855299
AV		 489 __be32 w1, w2;
490 __be32 mask;
1da177e4
LT		 491
492 w1 = a1[words];
493 w2 = a2[words];
494
495 mask = htonl((0xffffffff) << (32 - bits));
496
497 if ((w1 ^ w2) & mask)
498 return 0;
499 }
500
501 return 1;
502}
503
87c22ea5 504static int inet_diag_bc_run(const struct nlattr *_bc,
e31c5e0e 505 const struct inet_diag_entry *entry)
1da177e4 506{
87c22ea5
PE		 507 const void *bc = nla_data(_bc);
508 int len = nla_len(_bc);
509
1da177e4
LT		 510 while (len > 0) {
511 int yes = 1;
73c1f4a0 512 const struct inet_diag_bc_op *op = bc;
1da177e4
LT		 513
514 switch (op->code) {
73c1f4a0 515 case INET_DIAG_BC_NOP:
1da177e4 516 break;
73c1f4a0 517 case INET_DIAG_BC_JMP:
1da177e4
LT		 518 yes = 0;
519 break;
73c1f4a0 520 case INET_DIAG_BC_S_GE:
1da177e4
LT		 521 yes = entry->sport >= op[1].no;
522 break;
73c1f4a0 523 case INET_DIAG_BC_S_LE:
b4ced2b7 524 yes = entry->sport <= op[1].no;
1da177e4 525 break;
73c1f4a0 526 case INET_DIAG_BC_D_GE:
1da177e4
LT		 527 yes = entry->dport >= op[1].no;
528 break;
73c1f4a0 529 case INET_DIAG_BC_D_LE:
1da177e4
LT		 530 yes = entry->dport <= op[1].no;
531 break;
73c1f4a0 532 case INET_DIAG_BC_AUTO:
1da177e4
LT		 533 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
534 break;
73c1f4a0 535 case INET_DIAG_BC_S_COND:
a8c2190e 536 case INET_DIAG_BC_D_COND: {
e31c5e0e
ED		 537 const struct inet_diag_hostcond *cond;
538 const __be32 *addr;
1da177e4 539
e31c5e0e 540 cond = (const struct inet_diag_hostcond *)(op + 1);
1da177e4 541 if (cond->port != -1 &&
73c1f4a0 542 cond->port != (op->code == INET_DIAG_BC_S_COND ?
1da177e4
LT		 543 entry->sport : entry->dport)) {
544 yes = 0;
545 break;
546 }
4e852c02 547
73c1f4a0 548 if (op->code == INET_DIAG_BC_S_COND)
1da177e4
LT		 549 addr = entry->saddr;
550 else
551 addr = entry->daddr;
552
f67caec9
NC		 553 if (cond->family != AF_UNSPEC &&
554 cond->family != entry->family) {
555 if (entry->family == AF_INET6 &&
556 cond->family == AF_INET) {
557 if (addr[0] == 0 && addr[1] == 0 &&
558 addr[2] == htonl(0xffff) &&
559 bitstring_match(addr + 3,
560 cond->addr,
561 cond->prefix_len))
562 break;
563 }
564 yes = 0;
565 break;
566 }
567
568 if (cond->prefix_len == 0)
569 break;
4e852c02
ACM		 570 if (bitstring_match(addr, cond->addr,
571 cond->prefix_len))
1da177e4 572 break;
1da177e4
LT		 573 yes = 0;
574 break;
575 }
637c841d
DA		 576 case INET_DIAG_BC_DEV_COND: {
577 u32 ifindex;
578
579 ifindex = *((const u32 *)(op + 1));
580 if (ifindex != entry->ifindex)
581 yes = 0;
582 break;
583 }
a52e95ab
LC		 584 case INET_DIAG_BC_MARK_COND: {
585 struct inet_diag_markcond *cond;
586
587 cond = (struct inet_diag_markcond *)(op + 1);
588 if ((entry->mark & cond->mask) != cond->mark)
589 yes = 0;
590 break;
591 }
1da177e4
LT		 592 }
593
4e852c02 594 if (yes) {
1da177e4
LT		 595 len -= op->yes;
596 bc += op->yes;
597 } else {
598 len -= op->no;
599 bc += op->no;
600 }
601 }
a02cec21 602 return len == 0;
1da177e4
LT		 603}
604
a4458343
ED		 605/* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
606 */
607static void entry_fill_addrs(struct inet_diag_entry *entry,
608 const struct sock *sk)
609{
610#if IS_ENABLED(CONFIG_IPV6)
611 if (sk->sk_family == AF_INET6) {
612 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32;
613 entry->daddr = sk->sk_v6_daddr.s6_addr32;
614 } else
615#endif
616 {
617 entry->saddr = &sk->sk_rcv_saddr;
618 entry->daddr = &sk->sk_daddr;
619 }
620}
621
8d07d151
PE		 622int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
623{
8d07d151 624 struct inet_sock *inet = inet_sk(sk);
e31c5e0e 625 struct inet_diag_entry entry;
8d07d151 626
e31c5e0e 627 if (!bc)
8d07d151
PE		 628 return 1;
629
630 entry.family = sk->sk_family;
a4458343 631 entry_fill_addrs(&entry, sk);
8d07d151
PE		 632 entry.sport = inet->inet_num;
633 entry.dport = ntohs(inet->inet_dport);
637c841d 634 entry.ifindex = sk->sk_bound_dev_if;
a58917f5 635 entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0;
a52e95ab
LC		 636 if (sk_fullsock(sk))
637 entry.mark = sk->sk_mark;
638 else if (sk->sk_state == TCP_NEW_SYN_RECV)
639 entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark;
640 else
641 entry.mark = 0;
8d07d151
PE		 642
643 return inet_diag_bc_run(bc, &entry);
644}
645EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
646
1da177e4
LT		 647static int valid_cc(const void *bc, int len, int cc)
648{
649 while (len >= 0) {
73c1f4a0 650 const struct inet_diag_bc_op *op = bc;
1da177e4
LT		 651
652 if (cc > len)
653 return 0;
654 if (cc == len)
655 return 1;
eeb14972 656 if (op->yes < 4 || op->yes & 3)
1da177e4
LT		 657 return 0;
658 len -= op->yes;
659 bc += op->yes;
660 }
661 return 0;
662}
663
637c841d
DA		 664/* data is u32 ifindex */
665static bool valid_devcond(const struct inet_diag_bc_op *op, int len,
666 int *min_len)
667{
668 /* Check ifindex space. */
669 *min_len += sizeof(u32);
670 if (len < *min_len)
671 return false;
672
673 return true;
674}
405c0059
NC		 675/* Validate an inet_diag_hostcond. */
676static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
677 int *min_len)
678{
405c0059 679 struct inet_diag_hostcond *cond;
e31c5e0e 680 int addr_len;
405c0059
NC		 681
682 /* Check hostcond space. */
683 *min_len += sizeof(struct inet_diag_hostcond);
684 if (len < *min_len)
685 return false;
686 cond = (struct inet_diag_hostcond *)(op + 1);
687
688 /* Check address family and address length. */
689 switch (cond->family) {
690 case AF_UNSPEC:
691 addr_len = 0;
692 break;
693 case AF_INET:
694 addr_len = sizeof(struct in_addr);
695 break;
696 case AF_INET6:
697 addr_len = sizeof(struct in6_addr);
698 break;
699 default:
700 return false;
701 }
702 *min_len += addr_len;
703 if (len < *min_len)
704 return false;
705
706 /* Check prefix length (in bits) vs address length (in bytes). */
707 if (cond->prefix_len > 8 * addr_len)
708 return false;
709
710 return true;
711}
712
5e1f5420 713/* Validate a port comparison operator. */
e31c5e0e
ED		 714static bool valid_port_comparison(const struct inet_diag_bc_op *op,
715 int len, int *min_len)
5e1f5420
NC		 716{
717 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
718 *min_len += sizeof(struct inet_diag_bc_op);
719 if (len < *min_len)
720 return false;
721 return true;
722}
723
a52e95ab
LC		 724static bool valid_markcond(const struct inet_diag_bc_op *op, int len,
725 int *min_len)
1da177e4 726{
a52e95ab
LC		 727 *min_len += sizeof(struct inet_diag_markcond);
728 return len >= *min_len;
729}
730
731static int inet_diag_bc_audit(const struct nlattr *attr,
732 const struct sk_buff *skb)
733{
734 bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN);
627cc4ad
LC		 735 const void *bytecode, *bc;
736 int bytecode_len, len;
737
738 if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op))
739 return -EINVAL;
740
741 bytecode = bc = nla_data(attr);
742 len = bytecode_len = nla_len(attr);
1da177e4
LT		 743
744 while (len > 0) {
405c0059 745 int min_len = sizeof(struct inet_diag_bc_op);
e31c5e0e 746 const struct inet_diag_bc_op *op = bc;
1da177e4 747
1da177e4 748 switch (op->code) {
73c1f4a0
ACM		 749 case INET_DIAG_BC_S_COND:
750 case INET_DIAG_BC_D_COND:
405c0059
NC		 751 if (!valid_hostcond(bc, len, &min_len))
752 return -EINVAL;
5e1f5420 753 break;
637c841d
DA		 754 case INET_DIAG_BC_DEV_COND:
755 if (!valid_devcond(bc, len, &min_len))
756 return -EINVAL;
757 break;
73c1f4a0
ACM		 758 case INET_DIAG_BC_S_GE:
759 case INET_DIAG_BC_S_LE:
760 case INET_DIAG_BC_D_GE:
761 case INET_DIAG_BC_D_LE:
5e1f5420 762 if (!valid_port_comparison(bc, len, &min_len))
1da177e4
LT		 763 return -EINVAL;
764 break;
a52e95ab
LC		 765 case INET_DIAG_BC_MARK_COND:
766 if (!net_admin)
767 return -EPERM;
768 if (!valid_markcond(bc, len, &min_len))
769 return -EINVAL;
770 break;
5e1f5420
NC		 771 case INET_DIAG_BC_AUTO:
772 case INET_DIAG_BC_JMP:
73c1f4a0 773 case INET_DIAG_BC_NOP:
1da177e4
LT		 774 break;
775 default:
776 return -EINVAL;
777 }
5e1f5420
NC		 778
779 if (op->code != INET_DIAG_BC_NOP) {
780 if (op->no < min_len || op->no > len + 4 || op->no & 3)
781 return -EINVAL;
782 if (op->no < len &&
783 !valid_cc(bytecode, bytecode_len, len - op->no))
784 return -EINVAL;
785 }
786
405c0059 787 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
eeb14972 788 return -EINVAL;
4e852c02 789 bc += op->yes;
1da177e4
LT		 790 len -= op->yes;
791 }
792 return len == 0 ? 0 : -EINVAL;
793}
794
dff2c035
ACM		 795static int inet_csk_diag_dump(struct sock *sk,
796 struct sk_buff *skb,
37f352b5 797 struct netlink_callback *cb,
34160ea3 798 const struct inet_diag_req_v2 *r,
37f352b5 799 const struct nlattr *bc)
1da177e4 800{
8d07d151
PE		 801 if (!inet_diag_bc_sk(bc, sk))
802 return 0;
1da177e4 803
a029fe26 804 return inet_csk_diag_fill(sk, skb, r,
e32123e5 805 sk_user_ns(NETLINK_CB(cb->skb).sk),
15e47304 806 NETLINK_CB(cb->skb).portid,
dff2c035 807 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
1da177e4
LT		 808}
809
49612729
ED		 810static void twsk_build_assert(void)
811{
812 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
813 offsetof(struct sock, sk_family));
814
815 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
816 offsetof(struct inet_sock, inet_num));
817
818 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
819 offsetof(struct inet_sock, inet_dport));
820
821 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
822 offsetof(struct inet_sock, inet_rcv_saddr));
823
824 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
825 offsetof(struct inet_sock, inet_daddr));
826
827#if IS_ENABLED(CONFIG_IPV6)
828 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
829 offsetof(struct sock, sk_v6_rcv_saddr));
830
831 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
832 offsetof(struct sock, sk_v6_daddr));
833#endif
834}
835
1942c518 836void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
e31c5e0e 837 struct netlink_callback *cb,
34160ea3 838 const struct inet_diag_req_v2 *r, struct nlattr *bc)
1da177e4 839{
51d7cccf 840 struct net *net = sock_net(skb->sk);
e31c5e0e 841 int i, num, s_i, s_num;
079096f1 842 u32 idiag_states = r->idiag_states;
4e852c02 843
079096f1
ED		 844 if (idiag_states & TCPF_SYN_RECV)
845 idiag_states |= TCPF_NEW_SYN_RECV;
1da177e4
LT		 846 s_i = cb->args[1];
847 s_num = num = cb->args[2];
4f5736c4 848
1da177e4 849 if (cb->args[0] == 0) {
079096f1 850 if (!(idiag_states & TCPF_LISTEN))
1da177e4 851 goto skip_listen_ht;
540722ff 852
0f7ff927 853 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
5caea4ea 854 struct inet_listen_hashbucket *ilb;
e31c5e0e 855 struct sock *sk;
1da177e4
LT		 856
857 num = 0;
5caea4ea
ED		 858 ilb = &hashinfo->listening_hash[i];
859 spin_lock_bh(&ilb->lock);
3b24d854 860 sk_for_each(sk, &ilb->head) {
1da177e4
LT		 861 struct inet_sock *inet = inet_sk(sk);
862
51d7cccf
AV		 863 if (!net_eq(sock_net(sk), net))
864 continue;
865
1da177e4
LT		 866 if (num < s_num) {
867 num++;
868 continue;
869 }
870
d23deaa0 871 if (r->sdiag_family != AF_UNSPEC &&
e31c5e0e 872 sk->sk_family != r->sdiag_family)
d23deaa0
PE		 873 goto next_listen;
874
c720c7e8 875 if (r->id.idiag_sport != inet->inet_sport &&
73c1f4a0 876 r->id.idiag_sport)
1da177e4
LT		 877 goto next_listen;
878
079096f1 879 if (r->id.idiag_dport ||
1da177e4 880 cb->args[3] > 0)
1da177e4
LT		 881 goto next_listen;
882
079096f1 883 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
5caea4ea 884 spin_unlock_bh(&ilb->lock);
1da177e4
LT		 885 goto done;
886 }
887
888next_listen:
889 cb->args[3] = 0;
890 cb->args[4] = 0;
891 ++num;
892 }
5caea4ea 893 spin_unlock_bh(&ilb->lock);
1da177e4
LT		 894
895 s_num = 0;
896 cb->args[3] = 0;
897 cb->args[4] = 0;
898 }
1da177e4
LT		 899skip_listen_ht:
900 cb->args[0] = 1;
901 s_i = num = s_num = 0;
902 }
903
079096f1 904 if (!(idiag_states & ~TCPF_LISTEN))
efb3cb42 905 goto out;
1da177e4 906
f373b53b 907 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
540722ff 908 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
7e3aab4a 909 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
3ab5aee7 910 struct hlist_nulls_node *node;
e31c5e0e 911 struct sock *sk;
1da177e4 912
6be547a6
AK		 913 num = 0;
914
05dbc7b5 915 if (hlist_nulls_empty(&head->chain))
6be547a6
AK		 916 continue;
917
1da177e4
LT		 918 if (i > s_i)
919 s_num = 0;
920
7e3aab4a 921 spin_lock_bh(lock);
3ab5aee7 922 sk_nulls_for_each(sk, node, &head->chain) {
e31c5e0e 923 int state, res;
1da177e4 924
51d7cccf
AV		 925 if (!net_eq(sock_net(sk), net))
926 continue;
1da177e4
LT		 927 if (num < s_num)
928 goto next_normal;
70315d22
NC		 929 state = (sk->sk_state == TCP_TIME_WAIT) ?
930 inet_twsk(sk)->tw_substate : sk->sk_state;
079096f1 931 if (!(idiag_states & (1 << state)))
1da177e4 932 goto next_normal;
d23deaa0 933 if (r->sdiag_family != AF_UNSPEC &&
05dbc7b5 934 sk->sk_family != r->sdiag_family)
d23deaa0 935 goto next_normal;
05dbc7b5 936 if (r->id.idiag_sport != htons(sk->sk_num) &&
73c1f4a0 937 r->id.idiag_sport)
1da177e4 938 goto next_normal;
05dbc7b5 939 if (r->id.idiag_dport != sk->sk_dport &&
4e852c02 940 r->id.idiag_dport)
1da177e4 941 goto next_normal;
a58917f5
ED		 942 twsk_build_assert();
943
944 if (!inet_diag_bc_sk(bc, sk))
945 goto next_normal;
946
947 res = sk_diag_fill(sk, skb, r,
948 sk_user_ns(NETLINK_CB(cb->skb).sk),
949 NETLINK_CB(cb->skb).portid,
950 cb->nlh->nlmsg_seq, NLM_F_MULTI,
951 cb->nlh);
05dbc7b5 952 if (res < 0) {
7e3aab4a 953 spin_unlock_bh(lock);
1da177e4
LT		 954 goto done;
955 }
956next_normal:
957 ++num;
958 }
959
7e3aab4a 960 spin_unlock_bh(lock);
acffb584 961 cond_resched();
1da177e4
LT		 962 }
963
964done:
965 cb->args[1] = i;
966 cb->args[2] = num;
efb3cb42
PE		 967out:
968 ;
969}
1942c518 970EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
efb3cb42
PE		 971
972static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
34160ea3 973 const struct inet_diag_req_v2 *r,
e31c5e0e 974 struct nlattr *bc)
efb3cb42
PE		 975{
976 const struct inet_diag_handler *handler;
cacb6ba0 977 int err = 0;
efb3cb42
PE		 978
979 handler = inet_diag_lock_handler(r->sdiag_protocol);
980 if (!IS_ERR(handler))
1942c518 981 handler->dump(skb, cb, r, bc);
cacb6ba0
CG		 982 else
983 err = PTR_ERR(handler);
d523a328 984 inet_diag_unlock_handler(handler);
efb3cb42 985
cacb6ba0 986 return err ? : skb->len;
1da177e4
LT		 987}
988
25c4cd2b
PE		 989static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
990{
c8991362 991 int hdrlen = sizeof(struct inet_diag_req_v2);
e31c5e0e 992 struct nlattr *bc = NULL;
25c4cd2b
PE		 993
994 if (nlmsg_attrlen(cb->nlh, hdrlen))
995 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
996
d106352d 997 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
25c4cd2b
PE		 998}
999
e31c5e0e 1000static int inet_diag_type2proto(int type)
a029fe26
PE		 1001{
1002 switch (type) {
1003 case TCPDIAG_GETSOCK:
1004 return IPPROTO_TCP;
1005 case DCCPDIAG_GETSOCK:
1006 return IPPROTO_DCCP;
1007 default:
1008 return 0;
1009 }
1010}
1011
e31c5e0e
ED		 1012static int inet_diag_dump_compat(struct sk_buff *skb,
1013 struct netlink_callback *cb)
25c4cd2b 1014{
d106352d 1015 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
e31c5e0e 1016 int hdrlen = sizeof(struct inet_diag_req);
c8991362 1017 struct inet_diag_req_v2 req;
25c4cd2b 1018 struct nlattr *bc = NULL;
25c4cd2b 1019
d23deaa0 1020 req.sdiag_family = AF_UNSPEC; /* compatibility */
25c4cd2b
PE		 1021 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1022 req.idiag_ext = rc->idiag_ext;
1023 req.idiag_states = rc->idiag_states;
1024 req.id = rc->id;
1025
1026 if (nlmsg_attrlen(cb->nlh, hdrlen))
1027 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1028
1029 return __inet_diag_dump(skb, cb, &req, bc);
1030}
1031
fe50ce28 1032static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
e31c5e0e 1033 const struct nlmsghdr *nlh)
fe50ce28 1034{
d106352d 1035 struct inet_diag_req *rc = nlmsg_data(nlh);
c8991362 1036 struct inet_diag_req_v2 req;
fe50ce28
PE		 1037
1038 req.sdiag_family = rc->idiag_family;
1039 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1040 req.idiag_ext = rc->idiag_ext;
1041 req.idiag_states = rc->idiag_states;
1042 req.id = rc->id;
1043
6eb5d2e0 1044 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
fe50ce28
PE		 1045}
1046
8d34172d 1047static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 1048{
3b09c84c 1049 int hdrlen = sizeof(struct inet_diag_req);
51d7cccf 1050 struct net *net = sock_net(skb->sk);
1da177e4 1051
ead592ba
TG		 1052 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1053 nlmsg_len(nlh) < hdrlen)
1054 return -EINVAL;
1da177e4 1055
b8f3ab42 1056 if (nlh->nlmsg_flags & NLM_F_DUMP) {
ead592ba
TG		 1057 if (nlmsg_attrlen(nlh, hdrlen)) {
1058 struct nlattr *attr;
627cc4ad 1059 int err;
1da177e4 1060
ead592ba
TG		 1061 attr = nlmsg_find_attr(nlh, hdrlen,
1062 INET_DIAG_REQ_BYTECODE);
a52e95ab 1063 err = inet_diag_bc_audit(attr, skb);
627cc4ad
LC		 1064 if (err)
1065 return err;
ead592ba 1066 }
80d326fa
PNA		 1067 {
1068 struct netlink_dump_control c = {
1069 .dump = inet_diag_dump_compat,
1070 };
51d7cccf 1071 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
80d326fa 1072 }
1da177e4 1073 }
ead592ba 1074
fe50ce28 1075 return inet_diag_get_exact_compat(skb, nlh);
1da177e4
LT		 1076}
1077
6eb5d2e0 1078static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
d366477a 1079{
c8991362 1080 int hdrlen = sizeof(struct inet_diag_req_v2);
51d7cccf 1081 struct net *net = sock_net(skb->sk);
d366477a
PE		 1082
1083 if (nlmsg_len(h) < hdrlen)
1084 return -EINVAL;
1085
6eb5d2e0
LC		 1086 if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
1087 h->nlmsg_flags & NLM_F_DUMP) {
25c4cd2b
PE		 1088 if (nlmsg_attrlen(h, hdrlen)) {
1089 struct nlattr *attr;
627cc4ad 1090 int err;
e31c5e0e 1091
25c4cd2b
PE		 1092 attr = nlmsg_find_attr(h, hdrlen,
1093 INET_DIAG_REQ_BYTECODE);
a52e95ab 1094 err = inet_diag_bc_audit(attr, skb);
627cc4ad
LC		 1095 if (err)
1096 return err;
25c4cd2b 1097 }
80d326fa
PNA		 1098 {
1099 struct netlink_dump_control c = {
1100 .dump = inet_diag_dump,
1101 };
51d7cccf 1102 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
80d326fa 1103 }
d366477a
PE		 1104 }
1105
6eb5d2e0 1106 return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
d366477a
PE		 1107}
1108
35ac838a
CG		 1109static
1110int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
1111{
1112 const struct inet_diag_handler *handler;
1113 struct nlmsghdr *nlh;
1114 struct nlattr *attr;
1115 struct inet_diag_msg *r;
1116 void *info = NULL;
1117 int err = 0;
1118
1119 nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0);
1120 if (!nlh)
1121 return -ENOMEM;
1122
1123 r = nlmsg_data(nlh);
1124 memset(r, 0, sizeof(*r));
1125 inet_diag_msg_common_fill(r, sk);
e0df02e0
CG		 1126 if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM)
1127 r->id.idiag_sport = inet_sk(sk)->inet_sport;
35ac838a
CG		 1128 r->idiag_state = sk->sk_state;
1129
1130 if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) {
1131 nlmsg_cancel(skb, nlh);
1132 return err;
1133 }
1134
1135 handler = inet_diag_lock_handler(sk->sk_protocol);
1136 if (IS_ERR(handler)) {
1137 inet_diag_unlock_handler(handler);
1138 nlmsg_cancel(skb, nlh);
1139 return PTR_ERR(handler);
1140 }
1141
1142 attr = handler->idiag_info_size
6ed46d12
ND		 1143 ? nla_reserve_64bit(skb, INET_DIAG_INFO,
1144 handler->idiag_info_size,
1145 INET_DIAG_PAD)
35ac838a
CG		 1146 : NULL;
1147 if (attr)
1148 info = nla_data(attr);
1149
1150 handler->idiag_get_info(sk, r, info);
1151 inet_diag_unlock_handler(handler);
1152
1153 nlmsg_end(skb, nlh);
1154 return 0;
1155}
1156
8dcf01fc 1157static const struct sock_diag_handler inet_diag_handler = {
d366477a 1158 .family = AF_INET,
6eb5d2e0 1159 .dump = inet_diag_handler_cmd,
35ac838a 1160 .get_info = inet_diag_handler_get_info,
6eb5d2e0 1161 .destroy = inet_diag_handler_cmd,
d366477a
PE		 1162};
1163
8dcf01fc 1164static const struct sock_diag_handler inet6_diag_handler = {
d366477a 1165 .family = AF_INET6,
6eb5d2e0 1166 .dump = inet_diag_handler_cmd,
35ac838a 1167 .get_info = inet_diag_handler_get_info,
6eb5d2e0 1168 .destroy = inet_diag_handler_cmd,
d366477a
PE		 1169};
1170
4f5736c4
ACM		 1171int inet_diag_register(const struct inet_diag_handler *h)
1172{
1173 const __u16 type = h->idiag_type;
1174 int err = -EINVAL;
1175
f13c95f0 1176 if (type >= IPPROTO_MAX)
4f5736c4
ACM		 1177 goto out;
1178
d523a328 1179 mutex_lock(&inet_diag_table_mutex);
4f5736c4 1180 err = -EEXIST;
e31c5e0e 1181 if (!inet_diag_table[type]) {
4f5736c4
ACM		 1182 inet_diag_table[type] = h;
1183 err = 0;
1184 }
d523a328 1185 mutex_unlock(&inet_diag_table_mutex);
4f5736c4
ACM		 1186out:
1187 return err;
1188}
1189EXPORT_SYMBOL_GPL(inet_diag_register);
1190
1191void inet_diag_unregister(const struct inet_diag_handler *h)
1192{
1193 const __u16 type = h->idiag_type;
1194
f13c95f0 1195 if (type >= IPPROTO_MAX)
4f5736c4
ACM		 1196 return;
1197
d523a328 1198 mutex_lock(&inet_diag_table_mutex);
4f5736c4 1199 inet_diag_table[type] = NULL;
d523a328 1200 mutex_unlock(&inet_diag_table_mutex);
4f5736c4
ACM		 1201}
1202EXPORT_SYMBOL_GPL(inet_diag_unregister);
1203
73c1f4a0 1204static int __init inet_diag_init(void)
1da177e4 1205{
f13c95f0 1206 const int inet_diag_table_size = (IPPROTO_MAX *
4f5736c4
ACM		 1207 sizeof(struct inet_diag_handler *));
1208 int err = -ENOMEM;
1209
0da974f4 1210 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
4f5736c4
ACM		 1211 if (!inet_diag_table)
1212 goto out;
1213
d366477a
PE		 1214 err = sock_diag_register(&inet_diag_handler);
1215 if (err)
1216 goto out_free_nl;
1217
1218 err = sock_diag_register(&inet6_diag_handler);
1219 if (err)
1220 goto out_free_inet;
1221
8ef874bf 1222 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
4f5736c4
ACM		 1223out:
1224 return err;
d366477a
PE		 1225
1226out_free_inet:
1227 sock_diag_unregister(&inet_diag_handler);
1228out_free_nl:
4f5736c4
ACM		 1229 kfree(inet_diag_table);
1230 goto out;
1da177e4
LT		 1231}
1232
73c1f4a0 1233static void __exit inet_diag_exit(void)
1da177e4 1234{
d366477a
PE		 1235 sock_diag_unregister(&inet6_diag_handler);
1236 sock_diag_unregister(&inet_diag_handler);
8ef874bf 1237 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
4f5736c4 1238 kfree(inet_diag_table);
1da177e4
LT		 1239}
1240
73c1f4a0
ACM		 1241module_init(inet_diag_init);
1242module_exit(inet_diag_exit);
1da177e4 1243MODULE_LICENSE("GPL");
aec8dc62
PE		 1244MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1245MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);
Linux kernel - Deliverables
This page took 1.376898 seconds and 5 git commands to generate.