blob: 6029157a19ed1632fbf642416c0199829bf6d7ff [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03002 * inet_diag.c Module for monitoring INET transport protocols sockets.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * 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
Ilpo Järvinen172589c2007-08-28 15:50:33 -070012#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/module.h>
14#include <linux/types.h>
15#include <linux/fcntl.h>
16#include <linux/random.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#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>
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -030026#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>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070030#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32#include <linux/inet.h>
33#include <linux/stddef.h>
34
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -030035#include <linux/inet_diag.h>
Pavel Emelyanovd3664772011-12-06 07:58:03 +000036#include <linux/sock_diag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030038static const struct inet_diag_handler **inet_diag_table;
39
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030040struct inet_diag_entry {
Eric Dumazete31c5e02015-03-10 07:15:53 -070041 const __be32 *saddr;
42 const __be32 *daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 u16 sport;
44 u16 dport;
45 u16 family;
46 u16 userlocks;
47};
48
Herbert Xud523a322007-12-03 15:51:25 +110049static DEFINE_MUTEX(inet_diag_table_mutex);
50
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000051static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
Herbert Xud523a322007-12-03 15:51:25 +110052{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000053 if (!inet_diag_table[proto])
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +000054 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
55 NETLINK_SOCK_DIAG, AF_INET, proto);
Herbert Xud523a322007-12-03 15:51:25 +110056
57 mutex_lock(&inet_diag_table_mutex);
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000058 if (!inet_diag_table[proto])
Herbert Xud523a322007-12-03 15:51:25 +110059 return ERR_PTR(-ENOENT);
60
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000061 return inet_diag_table[proto];
Herbert Xud523a322007-12-03 15:51:25 +110062}
63
Eric Dumazete31c5e02015-03-10 07:15:53 -070064static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
Herbert Xud523a322007-12-03 15:51:25 +110065{
66 mutex_unlock(&inet_diag_table_mutex);
67}
68
Eric Dumazeta4458342015-03-13 15:51:12 -070069static void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk)
70{
71 r->idiag_family = sk->sk_family;
72
73 r->id.idiag_sport = htons(sk->sk_num);
74 r->id.idiag_dport = sk->sk_dport;
75 r->id.idiag_if = sk->sk_bound_dev_if;
76 sock_diag_save_cookie(sk, r->id.idiag_cookie);
77
78#if IS_ENABLED(CONFIG_IPV6)
79 if (sk->sk_family == AF_INET6) {
80 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
81 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
82 } else
83#endif
84 {
85 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
86 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
87
88 r->id.idiag_src[0] = sk->sk_rcv_saddr;
89 r->id.idiag_dst[0] = sk->sk_daddr;
90 }
91}
92
Eric Dumazetc8e2c802015-03-13 09:49:59 -070093static size_t inet_sk_attr_size(void)
94{
95 return nla_total_size(sizeof(struct tcp_info))
96 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
97 + nla_total_size(1) /* INET_DIAG_TOS */
98 + nla_total_size(1) /* INET_DIAG_TCLASS */
99 + nla_total_size(sizeof(struct inet_diag_meminfo))
100 + nla_total_size(sizeof(struct inet_diag_msg))
101 + nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
102 + nla_total_size(TCP_CA_NAME_MAX)
103 + nla_total_size(sizeof(struct tcpvegas_info))
104 + 64;
105}
106
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000107int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700108 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700109 struct user_namespace *user_ns,
110 u32 portid, u32 seq, u16 nlmsg_flags,
111 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700113 const struct inet_sock *inet = inet_sk(sk);
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700114 const struct tcp_congestion_ops *ca_ops;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700115 const struct inet_diag_handler *handler;
116 int ext = req->idiag_ext;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300117 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 struct nlmsghdr *nlh;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000119 struct nlattr *attr;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300120 void *info = NULL;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300121
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000122 handler = inet_diag_table[req->sdiag_protocol];
Eric Dumazete31c5e02015-03-10 07:15:53 -0700123 BUG_ON(!handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Eric W. Biederman15e47302012-09-07 20:12:54 +0000125 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +0000126 nlmsg_flags);
127 if (!nlh)
David S. Millerd1063522012-06-26 21:28:54 -0700128 return -EMSGSIZE;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300129
David S. Millerd1063522012-06-26 21:28:54 -0700130 r = nlmsg_data(nlh);
Eric Dumazeta58917f2015-03-15 21:12:14 -0700131 BUG_ON(!sk_fullsock(sk));
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800132
Eric Dumazeta4458342015-03-13 15:51:12 -0700133 inet_diag_msg_common_fill(r, sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300134 r->idiag_state = sk->sk_state;
135 r->idiag_timer = 0;
136 r->idiag_retrans = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Pavel Emelyanove4e541a2012-10-23 22:29:56 +0400138 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
139 goto errout;
140
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500141 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
142 * hence this needs to be included regardless of socket family.
143 */
144 if (ext & (1 << (INET_DIAG_TOS - 1)))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000145 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
146 goto errout;
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500147
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000148#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300149 if (r->idiag_family == AF_INET6) {
Maciej Żenczykowski06236ac2011-11-07 14:23:11 +0000150 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
Eric Dumazetefe42082013-10-03 15:42:29 -0700151 if (nla_put_u8(skb, INET_DIAG_TCLASS,
152 inet6_sk(sk)->tclass) < 0)
Thomas Graf6e277ed2012-06-26 23:36:12 +0000153 goto errout;
Phil Sutter20462152015-06-24 11:02:51 +0200154
Phil Sutter8220ea22015-07-10 11:39:57 +0200155 if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
156 nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
Phil Sutter20462152015-06-24 11:02:51 +0200157 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 }
159#endif
160
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600161 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000162 r->idiag_inode = sock_i_ino(sk);
163
Thomas Graf6e277ed2012-06-26 23:36:12 +0000164 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
165 struct inet_diag_meminfo minfo = {
166 .idiag_rmem = sk_rmem_alloc_get(sk),
167 .idiag_wmem = sk->sk_wmem_queued,
168 .idiag_fmem = sk->sk_forward_alloc,
169 .idiag_tmem = sk_wmem_alloc_get(sk),
170 };
171
172 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
173 goto errout;
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000174 }
175
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000176 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
177 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000178 goto errout;
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000179
Eric Dumazete31c5e02015-03-10 07:15:53 -0700180 if (!icsk) {
Shan Wei62ad6fc2012-04-24 18:15:41 +0000181 handler->idiag_get_info(sk, r, NULL);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000182 goto out;
183 }
184
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700185#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +0000187 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
188 icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
189 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300190 r->idiag_timer = 1;
191 r->idiag_retrans = icsk->icsk_retransmits;
192 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700193 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300194 r->idiag_timer = 4;
195 r->idiag_retrans = icsk->icsk_probes_out;
196 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300198 r->idiag_timer = 2;
199 r->idiag_retrans = icsk->icsk_probes_out;
200 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300202 r->idiag_timer = 0;
203 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 }
205#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300206
Craig Gallek3fd22af2015-06-15 11:26:19 -0400207 if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
Thomas Graf6e277ed2012-06-26 23:36:12 +0000208 attr = nla_reserve(skb, INET_DIAG_INFO,
Craig Gallek3fd22af2015-06-15 11:26:19 -0400209 handler->idiag_info_size);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000210 if (!attr)
211 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Thomas Graf6e277ed2012-06-26 23:36:12 +0000213 info = nla_data(attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 }
215
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700216 if (ext & (1 << (INET_DIAG_CONG - 1))) {
217 int err = 0;
218
219 rcu_read_lock();
220 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
221 if (ca_ops)
222 err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name);
223 rcu_read_unlock();
224 if (err < 0)
Thomas Graf6e277ed2012-06-26 23:36:12 +0000225 goto errout;
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700226 }
Thomas Graf6e277ed2012-06-26 23:36:12 +0000227
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300228 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700230 if (sk->sk_state < TCP_TIME_WAIT) {
Eric Dumazet64f40ff2015-04-28 16:23:48 -0700231 union tcp_cc_info info;
232 size_t sz = 0;
233 int attr;
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700234
235 rcu_read_lock();
236 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
237 if (ca_ops && ca_ops->get_info)
Eric Dumazet64f40ff2015-04-28 16:23:48 -0700238 sz = ca_ops->get_info(sk, ext, &attr, &info);
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700239 rcu_read_unlock();
Eric Dumazet64f40ff2015-04-28 16:23:48 -0700240 if (sz && nla_put(skb, attr, sz, &info) < 0)
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700241 goto errout;
242 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000244out:
Johannes Berg053c0952015-01-16 22:09:00 +0100245 nlmsg_end(skb, nlh);
246 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Thomas Graf6e277ed2012-06-26 23:36:12 +0000248errout:
249 nlmsg_cancel(skb, nlh);
Patrick McHardy26932562007-01-31 23:16:40 -0800250 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251}
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000252EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
253
254static int inet_csk_diag_fill(struct sock *sk,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700255 struct sk_buff *skb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700256 const struct inet_diag_req_v2 *req,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600257 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000258 u32 portid, u32 seq, u16 nlmsg_flags,
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000259 const struct nlmsghdr *unlh)
260{
Eric Dumazete31c5e02015-03-10 07:15:53 -0700261 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req,
262 user_ns, portid, seq, nlmsg_flags, unlh);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000263}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700265static int inet_twsk_diag_fill(struct sock *sk,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700266 struct sk_buff *skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000267 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800268 const struct nlmsghdr *unlh)
269{
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700270 struct inet_timewait_sock *tw = inet_twsk(sk);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800271 struct inet_diag_msg *r;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000272 struct nlmsghdr *nlh;
Eric Dumazet789f5582015-04-12 18:51:09 -0700273 long tmo;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800274
Eric W. Biederman15e47302012-09-07 20:12:54 +0000275 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +0000276 nlmsg_flags);
277 if (!nlh)
David S. Millerd1063522012-06-26 21:28:54 -0700278 return -EMSGSIZE;
David S. Millerd1063522012-06-26 21:28:54 -0700279
280 r = nlmsg_data(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800281 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
282
Eric Dumazet789f5582015-04-12 18:51:09 -0700283 tmo = tw->tw_timer.expires - jiffies;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800284 if (tmo < 0)
285 tmo = 0;
286
Eric Dumazeta4458342015-03-13 15:51:12 -0700287 inet_diag_msg_common_fill(r, sk);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800288 r->idiag_retrans = 0;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100289
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800290 r->idiag_state = tw->tw_substate;
291 r->idiag_timer = 3;
Eric Dumazet96f817f2013-10-03 14:27:25 -0700292 r->idiag_expires = jiffies_to_msecs(tmo);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800293 r->idiag_rqueue = 0;
294 r->idiag_wqueue = 0;
295 r->idiag_uid = 0;
296 r->idiag_inode = 0;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000297
Johannes Berg053c0952015-01-16 22:09:00 +0100298 nlmsg_end(skb, nlh);
299 return 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800300}
301
Eric Dumazeta58917f2015-03-15 21:12:14 -0700302static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb,
303 u32 portid, u32 seq, u16 nlmsg_flags,
304 const struct nlmsghdr *unlh)
305{
306 struct inet_diag_msg *r;
307 struct nlmsghdr *nlh;
308 long tmo;
309
310 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
311 nlmsg_flags);
312 if (!nlh)
313 return -EMSGSIZE;
314
315 r = nlmsg_data(nlh);
316 inet_diag_msg_common_fill(r, sk);
317 r->idiag_state = TCP_SYN_RECV;
318 r->idiag_timer = 1;
319 r->idiag_retrans = inet_reqsk(sk)->num_retrans;
320
321 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
322 offsetof(struct sock, sk_cookie));
323
Eric Dumazetfa76ce732015-03-19 19:04:20 -0700324 tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies;
Eric Dumazeta58917f2015-03-15 21:12:14 -0700325 r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0;
326 r->idiag_rqueue = 0;
327 r->idiag_wqueue = 0;
328 r->idiag_uid = 0;
329 r->idiag_inode = 0;
330
331 nlmsg_end(skb, nlh);
332 return 0;
333}
334
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800335static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700336 const struct inet_diag_req_v2 *r,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600337 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000338 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800339 const struct nlmsghdr *unlh)
340{
341 if (sk->sk_state == TCP_TIME_WAIT)
Eric Dumazeta58917f2015-03-15 21:12:14 -0700342 return inet_twsk_diag_fill(sk, skb, portid, seq,
Eric Dumazetefe42082013-10-03 15:42:29 -0700343 nlmsg_flags, unlh);
344
Eric Dumazeta58917f2015-03-15 21:12:14 -0700345 if (sk->sk_state == TCP_NEW_SYN_RECV)
346 return inet_req_diag_fill(sk, skb, portid, seq,
347 nlmsg_flags, unlh);
348
Eric Dumazetefe42082013-10-03 15:42:29 -0700349 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
350 nlmsg_flags, unlh);
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800351}
352
Lorenzo Colittib613f562015-12-16 12:30:02 +0900353struct sock *inet_diag_find_one_icsk(struct net *net,
354 struct inet_hashinfo *hashinfo,
355 const struct inet_diag_req_v2 *req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356{
Eric Dumazete31c5e02015-03-10 07:15:53 -0700357 struct sock *sk;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300358
Eric Dumazete31c5e02015-03-10 07:15:53 -0700359 if (req->sdiag_family == AF_INET)
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000360 sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0],
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300361 req->id.idiag_dport, req->id.idiag_src[0],
362 req->id.idiag_sport, req->id.idiag_if);
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000363#if IS_ENABLED(CONFIG_IPV6)
Eric Dumazet7c130672016-01-20 16:25:01 -0800364 else if (req->sdiag_family == AF_INET6) {
365 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
366 ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
367 sk = inet_lookup(net, hashinfo, req->id.idiag_dst[3],
368 req->id.idiag_dport, req->id.idiag_src[3],
369 req->id.idiag_sport, req->id.idiag_if);
370 else
371 sk = inet6_lookup(net, hashinfo,
372 (struct in6_addr *)req->id.idiag_dst,
373 req->id.idiag_dport,
374 (struct in6_addr *)req->id.idiag_src,
375 req->id.idiag_sport,
376 req->id.idiag_if);
377 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378#endif
Eric Dumazete31c5e02015-03-10 07:15:53 -0700379 else
Lorenzo Colittib613f562015-12-16 12:30:02 +0900380 return ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Eric Dumazete31c5e02015-03-10 07:15:53 -0700382 if (!sk)
Lorenzo Colittib613f562015-12-16 12:30:02 +0900383 return ERR_PTR(-ENOENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Lorenzo Colittib613f562015-12-16 12:30:02 +0900385 if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
386 sock_gen_put(sk);
387 return ERR_PTR(-ENOENT);
388 }
389
390 return sk;
391}
392EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
393
394int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
395 struct sk_buff *in_skb,
396 const struct nlmsghdr *nlh,
397 const struct inet_diag_req_v2 *req)
398{
399 struct net *net = sock_net(in_skb->sk);
400 struct sk_buff *rep;
401 struct sock *sk;
402 int err;
403
404 sk = inet_diag_find_one_icsk(net, hashinfo, req);
405 if (IS_ERR(sk))
406 return PTR_ERR(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
Eric Dumazetc8e2c802015-03-13 09:49:59 -0700408 rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000409 if (!rep) {
410 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 goto out;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000412 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000414 err = sk_diag_fill(sk, rep, req,
Patrick McHardye32123e2013-04-17 06:46:57 +0000415 sk_user_ns(NETLINK_CB(in_skb).sk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000416 NETLINK_CB(in_skb).portid,
Patrick McHardy26932562007-01-31 23:16:40 -0800417 nlh->nlmsg_seq, 0, nlh);
418 if (err < 0) {
419 WARN_ON(err == -EMSGSIZE);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000420 nlmsg_free(rep);
Patrick McHardy26932562007-01-31 23:16:40 -0800421 goto out;
422 }
Eric W. Biederman15e47302012-09-07 20:12:54 +0000423 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300424 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 if (err > 0)
426 err = 0;
427
428out:
Eric Dumazetc1d607c2013-10-11 08:54:49 -0700429 if (sk)
430 sock_gen_put(sk);
431
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000432 return err;
433}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000434EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000435
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900436static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000437 const struct nlmsghdr *nlh,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700438 const struct inet_diag_req_v2 *req)
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000439{
440 const struct inet_diag_handler *handler;
441 int err;
442
443 handler = inet_diag_lock_handler(req->sdiag_protocol);
444 if (IS_ERR(handler))
445 err = PTR_ERR(handler);
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900446 else if (cmd == SOCK_DIAG_BY_FAMILY)
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000447 err = handler->dump_one(in_skb, nlh, req);
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900448 else if (cmd == SOCK_DESTROY && handler->destroy)
449 err = handler->destroy(in_skb, req);
450 else
451 err = -EOPNOTSUPP;
Herbert Xud523a322007-12-03 15:51:25 +1100452 inet_diag_unlock_handler(handler);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000453
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 return err;
455}
456
Al Viro9f855292006-09-27 18:44:30 -0700457static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458{
459 int words = bits >> 5;
460
461 bits &= 0x1f;
462
463 if (words) {
464 if (memcmp(a1, a2, words << 2))
465 return 0;
466 }
467 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700468 __be32 w1, w2;
469 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
471 w1 = a1[words];
472 w2 = a2[words];
473
474 mask = htonl((0xffffffff) << (32 - bits));
475
476 if ((w1 ^ w2) & mask)
477 return 0;
478 }
479
480 return 1;
481}
482
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000483static int inet_diag_bc_run(const struct nlattr *_bc,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700484 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000486 const void *bc = nla_data(_bc);
487 int len = nla_len(_bc);
488
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 while (len > 0) {
490 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300491 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
493 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300494 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300496 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 yes = 0;
498 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300499 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 yes = entry->sport >= op[1].no;
501 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300502 case INET_DIAG_BC_S_LE:
Roel Kluinb4ced2b2010-01-19 14:12:20 -0800503 yes = entry->sport <= op[1].no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300505 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 yes = entry->dport >= op[1].no;
507 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300508 case INET_DIAG_BC_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 yes = entry->dport <= op[1].no;
510 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300511 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
513 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300514 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300515 case INET_DIAG_BC_D_COND: {
Eric Dumazete31c5e02015-03-10 07:15:53 -0700516 const struct inet_diag_hostcond *cond;
517 const __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
Eric Dumazete31c5e02015-03-10 07:15:53 -0700519 cond = (const struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300521 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 entry->sport : entry->dport)) {
523 yes = 0;
524 break;
525 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800526
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300527 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 addr = entry->saddr;
529 else
530 addr = entry->daddr;
531
Neal Cardwellf67caec2012-12-08 19:43:23 +0000532 if (cond->family != AF_UNSPEC &&
533 cond->family != entry->family) {
534 if (entry->family == AF_INET6 &&
535 cond->family == AF_INET) {
536 if (addr[0] == 0 && addr[1] == 0 &&
537 addr[2] == htonl(0xffff) &&
538 bitstring_match(addr + 3,
539 cond->addr,
540 cond->prefix_len))
541 break;
542 }
543 yes = 0;
544 break;
545 }
546
547 if (cond->prefix_len == 0)
548 break;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800549 if (bitstring_match(addr, cond->addr,
550 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 yes = 0;
553 break;
554 }
555 }
556
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800557 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 len -= op->yes;
559 bc += op->yes;
560 } else {
561 len -= op->no;
562 bc += op->no;
563 }
564 }
Eric Dumazeta02cec22010-09-22 20:43:57 +0000565 return len == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566}
567
Eric Dumazeta4458342015-03-13 15:51:12 -0700568/* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
569 */
570static void entry_fill_addrs(struct inet_diag_entry *entry,
571 const struct sock *sk)
572{
573#if IS_ENABLED(CONFIG_IPV6)
574 if (sk->sk_family == AF_INET6) {
575 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32;
576 entry->daddr = sk->sk_v6_daddr.s6_addr32;
577 } else
578#endif
579 {
580 entry->saddr = &sk->sk_rcv_saddr;
581 entry->daddr = &sk->sk_daddr;
582 }
583}
584
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000585int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
586{
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000587 struct inet_sock *inet = inet_sk(sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700588 struct inet_diag_entry entry;
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000589
Eric Dumazete31c5e02015-03-10 07:15:53 -0700590 if (!bc)
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000591 return 1;
592
593 entry.family = sk->sk_family;
Eric Dumazeta4458342015-03-13 15:51:12 -0700594 entry_fill_addrs(&entry, sk);
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000595 entry.sport = inet->inet_num;
596 entry.dport = ntohs(inet->inet_dport);
Eric Dumazeta58917f2015-03-15 21:12:14 -0700597 entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0;
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000598
599 return inet_diag_bc_run(bc, &entry);
600}
601EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603static int valid_cc(const void *bc, int len, int cc)
604{
605 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300606 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 if (cc > len)
609 return 0;
610 if (cc == len)
611 return 1;
Eric Dumazeteeb14972011-06-17 16:25:39 -0400612 if (op->yes < 4 || op->yes & 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 return 0;
614 len -= op->yes;
615 bc += op->yes;
616 }
617 return 0;
618}
619
Neal Cardwell405c0052012-12-08 19:43:22 +0000620/* Validate an inet_diag_hostcond. */
621static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
622 int *min_len)
623{
Neal Cardwell405c0052012-12-08 19:43:22 +0000624 struct inet_diag_hostcond *cond;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700625 int addr_len;
Neal Cardwell405c0052012-12-08 19:43:22 +0000626
627 /* Check hostcond space. */
628 *min_len += sizeof(struct inet_diag_hostcond);
629 if (len < *min_len)
630 return false;
631 cond = (struct inet_diag_hostcond *)(op + 1);
632
633 /* Check address family and address length. */
634 switch (cond->family) {
635 case AF_UNSPEC:
636 addr_len = 0;
637 break;
638 case AF_INET:
639 addr_len = sizeof(struct in_addr);
640 break;
641 case AF_INET6:
642 addr_len = sizeof(struct in6_addr);
643 break;
644 default:
645 return false;
646 }
647 *min_len += addr_len;
648 if (len < *min_len)
649 return false;
650
651 /* Check prefix length (in bits) vs address length (in bytes). */
652 if (cond->prefix_len > 8 * addr_len)
653 return false;
654
655 return true;
656}
657
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000658/* Validate a port comparison operator. */
Eric Dumazete31c5e02015-03-10 07:15:53 -0700659static bool valid_port_comparison(const struct inet_diag_bc_op *op,
660 int len, int *min_len)
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000661{
662 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
663 *min_len += sizeof(struct inet_diag_bc_op);
664 if (len < *min_len)
665 return false;
666 return true;
667}
668
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300669static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670{
Eric Dumazeteeb14972011-06-17 16:25:39 -0400671 const void *bc = bytecode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 int len = bytecode_len;
673
674 while (len > 0) {
Neal Cardwell405c0052012-12-08 19:43:22 +0000675 int min_len = sizeof(struct inet_diag_bc_op);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700676 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300679 case INET_DIAG_BC_S_COND:
680 case INET_DIAG_BC_D_COND:
Neal Cardwell405c0052012-12-08 19:43:22 +0000681 if (!valid_hostcond(bc, len, &min_len))
682 return -EINVAL;
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000683 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300684 case INET_DIAG_BC_S_GE:
685 case INET_DIAG_BC_S_LE:
686 case INET_DIAG_BC_D_GE:
687 case INET_DIAG_BC_D_LE:
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000688 if (!valid_port_comparison(bc, len, &min_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 return -EINVAL;
690 break;
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000691 case INET_DIAG_BC_AUTO:
692 case INET_DIAG_BC_JMP:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300693 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 break;
695 default:
696 return -EINVAL;
697 }
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000698
699 if (op->code != INET_DIAG_BC_NOP) {
700 if (op->no < min_len || op->no > len + 4 || op->no & 3)
701 return -EINVAL;
702 if (op->no < len &&
703 !valid_cc(bytecode, bytecode_len, len - op->no))
704 return -EINVAL;
705 }
706
Neal Cardwell405c0052012-12-08 19:43:22 +0000707 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
Eric Dumazeteeb14972011-06-17 16:25:39 -0400708 return -EINVAL;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800709 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 len -= op->yes;
711 }
712 return len == 0 ? 0 : -EINVAL;
713}
714
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800715static int inet_csk_diag_dump(struct sock *sk,
716 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000717 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700718 const struct inet_diag_req_v2 *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000719 const struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720{
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000721 if (!inet_diag_bc_sk(bc, sk))
722 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000724 return inet_csk_diag_fill(sk, skb, r,
Patrick McHardye32123e2013-04-17 06:46:57 +0000725 sk_user_ns(NETLINK_CB(cb->skb).sk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000726 NETLINK_CB(cb->skb).portid,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800727 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728}
729
Eric Dumazet49612722015-03-05 10:18:14 -0800730static void twsk_build_assert(void)
731{
732 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
733 offsetof(struct sock, sk_family));
734
735 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
736 offsetof(struct inet_sock, inet_num));
737
738 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
739 offsetof(struct inet_sock, inet_dport));
740
741 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
742 offsetof(struct inet_sock, inet_rcv_saddr));
743
744 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
745 offsetof(struct inet_sock, inet_daddr));
746
747#if IS_ENABLED(CONFIG_IPV6)
748 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
749 offsetof(struct sock, sk_v6_rcv_saddr));
750
751 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
752 offsetof(struct sock, sk_v6_daddr));
753#endif
754}
755
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000756void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700757 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700758 const struct inet_diag_req_v2 *r, struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759{
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000760 struct net *net = sock_net(skb->sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700761 int i, num, s_i, s_num;
Eric Dumazet079096f2015-10-02 11:43:32 -0700762 u32 idiag_states = r->idiag_states;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800763
Eric Dumazet079096f2015-10-02 11:43:32 -0700764 if (idiag_states & TCPF_SYN_RECV)
765 idiag_states |= TCPF_NEW_SYN_RECV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 s_i = cb->args[1];
767 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 if (cb->args[0] == 0) {
Eric Dumazet079096f2015-10-02 11:43:32 -0700770 if (!(idiag_states & TCPF_LISTEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300772
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700773 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800774 struct inet_listen_hashbucket *ilb;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700775 struct hlist_nulls_node *node;
776 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 num = 0;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800779 ilb = &hashinfo->listening_hash[i];
780 spin_lock_bh(&ilb->lock);
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800781 sk_nulls_for_each(sk, node, &ilb->head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 struct inet_sock *inet = inet_sk(sk);
783
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000784 if (!net_eq(sock_net(sk), net))
785 continue;
786
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 if (num < s_num) {
788 num++;
789 continue;
790 }
791
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000792 if (r->sdiag_family != AF_UNSPEC &&
Eric Dumazete31c5e02015-03-10 07:15:53 -0700793 sk->sk_family != r->sdiag_family)
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000794 goto next_listen;
795
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000796 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300797 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 goto next_listen;
799
Eric Dumazet079096f2015-10-02 11:43:32 -0700800 if (r->id.idiag_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 cb->args[3] > 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 goto next_listen;
803
Eric Dumazet079096f2015-10-02 11:43:32 -0700804 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800805 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 goto done;
807 }
808
809next_listen:
810 cb->args[3] = 0;
811 cb->args[4] = 0;
812 ++num;
813 }
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800814 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
816 s_num = 0;
817 cb->args[3] = 0;
818 cb->args[4] = 0;
819 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820skip_listen_ht:
821 cb->args[0] = 1;
822 s_i = num = s_num = 0;
823 }
824
Eric Dumazet079096f2015-10-02 11:43:32 -0700825 if (!(idiag_states & ~TCPF_LISTEN))
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000826 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
Eric Dumazetf373b532009-10-09 00:16:19 +0000828 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300829 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
David S. Miller7e3aab42008-11-21 16:39:19 -0800830 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800831 struct hlist_nulls_node *node;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700832 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Andi Kleen6be547a2008-08-28 01:09:54 -0700834 num = 0;
835
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700836 if (hlist_nulls_empty(&head->chain))
Andi Kleen6be547a2008-08-28 01:09:54 -0700837 continue;
838
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 if (i > s_i)
840 s_num = 0;
841
David S. Miller7e3aab42008-11-21 16:39:19 -0800842 spin_lock_bh(lock);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800843 sk_nulls_for_each(sk, node, &head->chain) {
Eric Dumazete31c5e02015-03-10 07:15:53 -0700844 int state, res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000846 if (!net_eq(sock_net(sk), net))
847 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 if (num < s_num)
849 goto next_normal;
Neal Cardwell70315d22014-01-10 15:34:45 -0500850 state = (sk->sk_state == TCP_TIME_WAIT) ?
851 inet_twsk(sk)->tw_substate : sk->sk_state;
Eric Dumazet079096f2015-10-02 11:43:32 -0700852 if (!(idiag_states & (1 << state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 goto next_normal;
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000854 if (r->sdiag_family != AF_UNSPEC &&
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700855 sk->sk_family != r->sdiag_family)
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000856 goto next_normal;
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700857 if (r->id.idiag_sport != htons(sk->sk_num) &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300858 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 goto next_normal;
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700860 if (r->id.idiag_dport != sk->sk_dport &&
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800861 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 goto next_normal;
Eric Dumazeta58917f2015-03-15 21:12:14 -0700863 twsk_build_assert();
864
865 if (!inet_diag_bc_sk(bc, sk))
866 goto next_normal;
867
868 res = sk_diag_fill(sk, skb, r,
869 sk_user_ns(NETLINK_CB(cb->skb).sk),
870 NETLINK_CB(cb->skb).portid,
871 cb->nlh->nlmsg_seq, NLM_F_MULTI,
872 cb->nlh);
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700873 if (res < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800874 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 goto done;
876 }
877next_normal:
878 ++num;
879 }
880
David S. Miller7e3aab42008-11-21 16:39:19 -0800881 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 }
883
884done:
885 cb->args[1] = i;
886 cb->args[2] = num;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000887out:
888 ;
889}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000890EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000891
892static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700893 const struct inet_diag_req_v2 *r,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700894 struct nlattr *bc)
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000895{
896 const struct inet_diag_handler *handler;
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000897 int err = 0;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000898
899 handler = inet_diag_lock_handler(r->sdiag_protocol);
900 if (!IS_ERR(handler))
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000901 handler->dump(skb, cb, r, bc);
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000902 else
903 err = PTR_ERR(handler);
Herbert Xud523a322007-12-03 15:51:25 +1100904 inet_diag_unlock_handler(handler);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000905
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000906 return err ? : skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907}
908
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000909static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
910{
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000911 int hdrlen = sizeof(struct inet_diag_req_v2);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700912 struct nlattr *bc = NULL;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000913
914 if (nlmsg_attrlen(cb->nlh, hdrlen))
915 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
916
David S. Millerd1063522012-06-26 21:28:54 -0700917 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000918}
919
Eric Dumazete31c5e02015-03-10 07:15:53 -0700920static int inet_diag_type2proto(int type)
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000921{
922 switch (type) {
923 case TCPDIAG_GETSOCK:
924 return IPPROTO_TCP;
925 case DCCPDIAG_GETSOCK:
926 return IPPROTO_DCCP;
927 default:
928 return 0;
929 }
930}
931
Eric Dumazete31c5e02015-03-10 07:15:53 -0700932static int inet_diag_dump_compat(struct sk_buff *skb,
933 struct netlink_callback *cb)
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000934{
David S. Millerd1063522012-06-26 21:28:54 -0700935 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700936 int hdrlen = sizeof(struct inet_diag_req);
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000937 struct inet_diag_req_v2 req;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000938 struct nlattr *bc = NULL;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000939
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000940 req.sdiag_family = AF_UNSPEC; /* compatibility */
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000941 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
942 req.idiag_ext = rc->idiag_ext;
943 req.idiag_states = rc->idiag_states;
944 req.id = rc->id;
945
946 if (nlmsg_attrlen(cb->nlh, hdrlen))
947 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
948
949 return __inet_diag_dump(skb, cb, &req, bc);
950}
951
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000952static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700953 const struct nlmsghdr *nlh)
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000954{
David S. Millerd1063522012-06-26 21:28:54 -0700955 struct inet_diag_req *rc = nlmsg_data(nlh);
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000956 struct inet_diag_req_v2 req;
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000957
958 req.sdiag_family = rc->idiag_family;
959 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
960 req.idiag_ext = rc->idiag_ext;
961 req.idiag_states = rc->idiag_states;
962 req.id = rc->id;
963
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900964 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000965}
966
Pavel Emelyanov8d341722011-12-06 07:57:06 +0000967static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968{
Pavel Emelyanov3b09c842012-01-10 22:37:26 +0000969 int hdrlen = sizeof(struct inet_diag_req);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000970 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Thomas Grafead592b2007-03-22 23:30:35 -0700972 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
973 nlmsg_len(nlh) < hdrlen)
974 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
David S. Millerb8f3ab42011-01-18 12:40:38 -0800976 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -0700977 if (nlmsg_attrlen(nlh, hdrlen)) {
978 struct nlattr *attr;
979
980 attr = nlmsg_find_attr(nlh, hdrlen,
981 INET_DIAG_REQ_BYTECODE);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700982 if (!attr ||
Thomas Grafead592b2007-03-22 23:30:35 -0700983 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
984 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
985 return -EINVAL;
986 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +0000987 {
988 struct netlink_dump_control c = {
989 .dump = inet_diag_dump_compat,
990 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000991 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +0000992 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 }
Thomas Grafead592b2007-03-22 23:30:35 -0700994
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000995 return inet_diag_get_exact_compat(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996}
997
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900998static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
Pavel Emelyanovd3664772011-12-06 07:58:03 +0000999{
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001000 int hdrlen = sizeof(struct inet_diag_req_v2);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001001 struct net *net = sock_net(skb->sk);
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001002
1003 if (nlmsg_len(h) < hdrlen)
1004 return -EINVAL;
1005
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001006 if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
1007 h->nlmsg_flags & NLM_F_DUMP) {
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001008 if (nlmsg_attrlen(h, hdrlen)) {
1009 struct nlattr *attr;
Eric Dumazete31c5e02015-03-10 07:15:53 -07001010
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001011 attr = nlmsg_find_attr(h, hdrlen,
1012 INET_DIAG_REQ_BYTECODE);
Eric Dumazete31c5e02015-03-10 07:15:53 -07001013 if (!attr ||
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001014 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1015 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1016 return -EINVAL;
1017 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001018 {
1019 struct netlink_dump_control c = {
1020 .dump = inet_diag_dump,
1021 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001022 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001023 }
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001024 }
1025
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001026 return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001027}
1028
Craig Gallek35ac8382015-06-15 11:26:20 -04001029static
1030int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
1031{
1032 const struct inet_diag_handler *handler;
1033 struct nlmsghdr *nlh;
1034 struct nlattr *attr;
1035 struct inet_diag_msg *r;
1036 void *info = NULL;
1037 int err = 0;
1038
1039 nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0);
1040 if (!nlh)
1041 return -ENOMEM;
1042
1043 r = nlmsg_data(nlh);
1044 memset(r, 0, sizeof(*r));
1045 inet_diag_msg_common_fill(r, sk);
Craig Galleke0df02e2015-06-17 10:59:10 -04001046 if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM)
1047 r->id.idiag_sport = inet_sk(sk)->inet_sport;
Craig Gallek35ac8382015-06-15 11:26:20 -04001048 r->idiag_state = sk->sk_state;
1049
1050 if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) {
1051 nlmsg_cancel(skb, nlh);
1052 return err;
1053 }
1054
1055 handler = inet_diag_lock_handler(sk->sk_protocol);
1056 if (IS_ERR(handler)) {
1057 inet_diag_unlock_handler(handler);
1058 nlmsg_cancel(skb, nlh);
1059 return PTR_ERR(handler);
1060 }
1061
1062 attr = handler->idiag_info_size
1063 ? nla_reserve(skb, INET_DIAG_INFO, handler->idiag_info_size)
1064 : NULL;
1065 if (attr)
1066 info = nla_data(attr);
1067
1068 handler->idiag_get_info(sk, r, info);
1069 inet_diag_unlock_handler(handler);
1070
1071 nlmsg_end(skb, nlh);
1072 return 0;
1073}
1074
Shan Wei8dcf01f2012-04-24 18:21:07 +00001075static const struct sock_diag_handler inet_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001076 .family = AF_INET,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001077 .dump = inet_diag_handler_cmd,
Craig Gallek35ac8382015-06-15 11:26:20 -04001078 .get_info = inet_diag_handler_get_info,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001079 .destroy = inet_diag_handler_cmd,
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001080};
1081
Shan Wei8dcf01f2012-04-24 18:21:07 +00001082static const struct sock_diag_handler inet6_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001083 .family = AF_INET6,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001084 .dump = inet_diag_handler_cmd,
Craig Gallek35ac8382015-06-15 11:26:20 -04001085 .get_info = inet_diag_handler_get_info,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001086 .destroy = inet_diag_handler_cmd,
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001087};
1088
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001089int inet_diag_register(const struct inet_diag_handler *h)
1090{
1091 const __u16 type = h->idiag_type;
1092 int err = -EINVAL;
1093
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001094 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001095 goto out;
1096
Herbert Xud523a322007-12-03 15:51:25 +11001097 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001098 err = -EEXIST;
Eric Dumazete31c5e02015-03-10 07:15:53 -07001099 if (!inet_diag_table[type]) {
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001100 inet_diag_table[type] = h;
1101 err = 0;
1102 }
Herbert Xud523a322007-12-03 15:51:25 +11001103 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001104out:
1105 return err;
1106}
1107EXPORT_SYMBOL_GPL(inet_diag_register);
1108
1109void inet_diag_unregister(const struct inet_diag_handler *h)
1110{
1111 const __u16 type = h->idiag_type;
1112
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001113 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001114 return;
1115
Herbert Xud523a322007-12-03 15:51:25 +11001116 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001117 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +11001118 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001119}
1120EXPORT_SYMBOL_GPL(inet_diag_unregister);
1121
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001122static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001124 const int inet_diag_table_size = (IPPROTO_MAX *
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001125 sizeof(struct inet_diag_handler *));
1126 int err = -ENOMEM;
1127
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001128 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001129 if (!inet_diag_table)
1130 goto out;
1131
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001132 err = sock_diag_register(&inet_diag_handler);
1133 if (err)
1134 goto out_free_nl;
1135
1136 err = sock_diag_register(&inet6_diag_handler);
1137 if (err)
1138 goto out_free_inet;
1139
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001140 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001141out:
1142 return err;
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001143
1144out_free_inet:
1145 sock_diag_unregister(&inet_diag_handler);
1146out_free_nl:
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001147 kfree(inet_diag_table);
1148 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149}
1150
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001151static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152{
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001153 sock_diag_unregister(&inet6_diag_handler);
1154 sock_diag_unregister(&inet_diag_handler);
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001155 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001156 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157}
1158
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001159module_init(inet_diag_init);
1160module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161MODULE_LICENSE("GPL");
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +00001162MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1163MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);