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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;
Neal Cardwell1c95df82012-12-08 19:43:21 +000047#if IS_ENABLED(CONFIG_IPV6)
48 struct in6_addr saddr_storage; /* for IPv4-mapped-IPv6 addresses */
49 struct in6_addr daddr_storage; /* for IPv4-mapped-IPv6 addresses */
50#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070051};
52
Herbert Xud523a322007-12-03 15:51:25 +110053static DEFINE_MUTEX(inet_diag_table_mutex);
54
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000055static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
Herbert Xud523a322007-12-03 15:51:25 +110056{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000057 if (!inet_diag_table[proto])
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +000058 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
59 NETLINK_SOCK_DIAG, AF_INET, proto);
Herbert Xud523a322007-12-03 15:51:25 +110060
61 mutex_lock(&inet_diag_table_mutex);
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000062 if (!inet_diag_table[proto])
Herbert Xud523a322007-12-03 15:51:25 +110063 return ERR_PTR(-ENOENT);
64
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000065 return inet_diag_table[proto];
Herbert Xud523a322007-12-03 15:51:25 +110066}
67
Eric Dumazete31c5e02015-03-10 07:15:53 -070068static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
Herbert Xud523a322007-12-03 15:51:25 +110069{
70 mutex_unlock(&inet_diag_table_mutex);
71}
72
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +000073int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
Eric Dumazet34160ea2015-03-10 07:15:54 -070074 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
Eric Dumazete31c5e02015-03-10 07:15:53 -070075 struct user_namespace *user_ns,
76 u32 portid, u32 seq, u16 nlmsg_flags,
77 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070079 const struct inet_sock *inet = inet_sk(sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -070080 const struct inet_diag_handler *handler;
81 int ext = req->idiag_ext;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030082 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct nlmsghdr *nlh;
Thomas Graf6e277ed2012-06-26 23:36:12 +000084 struct nlattr *attr;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030085 void *info = NULL;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030086
Pavel Emelyanova029fe22011-12-06 07:59:32 +000087 handler = inet_diag_table[req->sdiag_protocol];
Eric Dumazete31c5e02015-03-10 07:15:53 -070088 BUG_ON(!handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Eric W. Biederman15e47302012-09-07 20:12:54 +000090 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +000091 nlmsg_flags);
92 if (!nlh)
David S. Millerd1063522012-06-26 21:28:54 -070093 return -EMSGSIZE;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030094
David S. Millerd1063522012-06-26 21:28:54 -070095 r = nlmsg_data(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080096 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -080097
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030098 r->idiag_family = sk->sk_family;
99 r->idiag_state = sk->sk_state;
100 r->idiag_timer = 0;
101 r->idiag_retrans = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300103 r->id.idiag_if = sk->sk_bound_dev_if;
Pavel Emelyanovf65c1b52011-12-15 02:43:44 +0000104 sock_diag_save_cookie(sk, r->id.idiag_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000106 r->id.idiag_sport = inet->inet_sport;
107 r->id.idiag_dport = inet->inet_dport;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100108
109 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
110 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
111
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000112 r->id.idiag_src[0] = inet->inet_rcv_saddr;
113 r->id.idiag_dst[0] = inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Pavel Emelyanove4e541a2012-10-23 22:29:56 +0400115 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
116 goto errout;
117
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500118 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
119 * hence this needs to be included regardless of socket family.
120 */
121 if (ext & (1 << (INET_DIAG_TOS - 1)))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000122 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
123 goto errout;
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500124
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000125#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300126 if (r->idiag_family == AF_INET6) {
Eric Dumazetefe42082013-10-03 15:42:29 -0700127 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
128 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000129
Maciej Żenczykowski06236ac2011-11-07 14:23:11 +0000130 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
Eric Dumazetefe42082013-10-03 15:42:29 -0700131 if (nla_put_u8(skb, INET_DIAG_TCLASS,
132 inet6_sk(sk)->tclass) < 0)
Thomas Graf6e277ed2012-06-26 23:36:12 +0000133 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 }
135#endif
136
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600137 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000138 r->idiag_inode = sock_i_ino(sk);
139
Thomas Graf6e277ed2012-06-26 23:36:12 +0000140 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
141 struct inet_diag_meminfo minfo = {
142 .idiag_rmem = sk_rmem_alloc_get(sk),
143 .idiag_wmem = sk->sk_wmem_queued,
144 .idiag_fmem = sk->sk_forward_alloc,
145 .idiag_tmem = sk_wmem_alloc_get(sk),
146 };
147
148 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
149 goto errout;
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000150 }
151
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000152 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
153 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000154 goto errout;
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000155
Eric Dumazete31c5e02015-03-10 07:15:53 -0700156 if (!icsk) {
Shan Wei62ad6fc2012-04-24 18:15:41 +0000157 handler->idiag_get_info(sk, r, NULL);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000158 goto out;
159 }
160
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700161#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +0000163 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
164 icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
165 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300166 r->idiag_timer = 1;
167 r->idiag_retrans = icsk->icsk_retransmits;
168 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700169 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300170 r->idiag_timer = 4;
171 r->idiag_retrans = icsk->icsk_probes_out;
172 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300174 r->idiag_timer = 2;
175 r->idiag_retrans = icsk->icsk_probes_out;
176 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300178 r->idiag_timer = 0;
179 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 }
181#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300182
Thomas Graf6e277ed2012-06-26 23:36:12 +0000183 if (ext & (1 << (INET_DIAG_INFO - 1))) {
184 attr = nla_reserve(skb, INET_DIAG_INFO,
185 sizeof(struct tcp_info));
186 if (!attr)
187 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Thomas Graf6e277ed2012-06-26 23:36:12 +0000189 info = nla_data(attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 }
191
Thomas Graf6e277ed2012-06-26 23:36:12 +0000192 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops)
193 if (nla_put_string(skb, INET_DIAG_CONG,
194 icsk->icsk_ca_ops->name) < 0)
195 goto errout;
196
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300197 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Arnaldo Carvalho de Melo6687e982005-08-10 04:03:31 -0300199 if (sk->sk_state < TCP_TIME_WAIT &&
200 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
201 icsk->icsk_ca_ops->get_info(sk, ext, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000203out:
Johannes Berg053c0952015-01-16 22:09:00 +0100204 nlmsg_end(skb, nlh);
205 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Thomas Graf6e277ed2012-06-26 23:36:12 +0000207errout:
208 nlmsg_cancel(skb, nlh);
Patrick McHardy26932562007-01-31 23:16:40 -0800209 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210}
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000211EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
212
213static int inet_csk_diag_fill(struct sock *sk,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700214 struct sk_buff *skb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700215 const struct inet_diag_req_v2 *req,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600216 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000217 u32 portid, u32 seq, u16 nlmsg_flags,
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000218 const struct nlmsghdr *unlh)
219{
Eric Dumazete31c5e02015-03-10 07:15:53 -0700220 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req,
221 user_ns, portid, seq, nlmsg_flags, unlh);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000222}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700224static int inet_twsk_diag_fill(struct sock *sk,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700225 struct sk_buff *skb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700226 const struct inet_diag_req_v2 *req,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000227 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800228 const struct nlmsghdr *unlh)
229{
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700230 struct inet_timewait_sock *tw = inet_twsk(sk);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800231 struct inet_diag_msg *r;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000232 struct nlmsghdr *nlh;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700233 s32 tmo;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800234
Eric W. Biederman15e47302012-09-07 20:12:54 +0000235 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +0000236 nlmsg_flags);
237 if (!nlh)
David S. Millerd1063522012-06-26 21:28:54 -0700238 return -EMSGSIZE;
David S. Millerd1063522012-06-26 21:28:54 -0700239
240 r = nlmsg_data(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800241 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
242
Eric Dumazet96f817f2013-10-03 14:27:25 -0700243 tmo = tw->tw_ttd - inet_tw_time_stamp();
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800244 if (tmo < 0)
245 tmo = 0;
246
247 r->idiag_family = tw->tw_family;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800248 r->idiag_retrans = 0;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100249
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800250 r->id.idiag_if = tw->tw_bound_dev_if;
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700251 sock_diag_save_cookie(sk, r->id.idiag_cookie);
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100252
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800253 r->id.idiag_sport = tw->tw_sport;
254 r->id.idiag_dport = tw->tw_dport;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100255
256 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
257 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
258
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800259 r->id.idiag_src[0] = tw->tw_rcv_saddr;
260 r->id.idiag_dst[0] = tw->tw_daddr;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100261
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800262 r->idiag_state = tw->tw_substate;
263 r->idiag_timer = 3;
Eric Dumazet96f817f2013-10-03 14:27:25 -0700264 r->idiag_expires = jiffies_to_msecs(tmo);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800265 r->idiag_rqueue = 0;
266 r->idiag_wqueue = 0;
267 r->idiag_uid = 0;
268 r->idiag_inode = 0;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000269#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800270 if (tw->tw_family == AF_INET6) {
Eric Dumazetefe42082013-10-03 15:42:29 -0700271 *(struct in6_addr *)r->id.idiag_src = tw->tw_v6_rcv_saddr;
272 *(struct in6_addr *)r->id.idiag_dst = tw->tw_v6_daddr;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800273 }
274#endif
Thomas Graf6e277ed2012-06-26 23:36:12 +0000275
Johannes Berg053c0952015-01-16 22:09:00 +0100276 nlmsg_end(skb, nlh);
277 return 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800278}
279
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800280static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700281 const struct inet_diag_req_v2 *r,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600282 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000283 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800284 const struct nlmsghdr *unlh)
285{
286 if (sk->sk_state == TCP_TIME_WAIT)
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700287 return inet_twsk_diag_fill(sk, skb, r, portid, seq,
Eric Dumazetefe42082013-10-03 15:42:29 -0700288 nlmsg_flags, unlh);
289
290 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
291 nlmsg_flags, unlh);
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800292}
293
Eric Dumazete31c5e02015-03-10 07:15:53 -0700294int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
295 struct sk_buff *in_skb,
296 const struct nlmsghdr *nlh,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700297 const struct inet_diag_req_v2 *req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298{
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000299 struct net *net = sock_net(in_skb->sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700300 struct sk_buff *rep;
301 struct sock *sk;
302 int err;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300303
Herbert Xud523a322007-12-03 15:51:25 +1100304 err = -EINVAL;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700305 if (req->sdiag_family == AF_INET)
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000306 sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0],
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300307 req->id.idiag_dport, req->id.idiag_src[0],
308 req->id.idiag_sport, req->id.idiag_if);
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000309#if IS_ENABLED(CONFIG_IPV6)
Eric Dumazete31c5e02015-03-10 07:15:53 -0700310 else if (req->sdiag_family == AF_INET6)
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000311 sk = inet6_lookup(net, hashinfo,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300312 (struct in6_addr *)req->id.idiag_dst,
313 req->id.idiag_dport,
314 (struct in6_addr *)req->id.idiag_src,
315 req->id.idiag_sport,
316 req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317#endif
Eric Dumazete31c5e02015-03-10 07:15:53 -0700318 else
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000319 goto out_nosk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Herbert Xud523a322007-12-03 15:51:25 +1100321 err = -ENOENT;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700322 if (!sk)
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000323 goto out_nosk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
Pavel Emelyanovf65c1b52011-12-15 02:43:44 +0000325 err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
Pavel Emelyanovb005ab42011-12-09 06:21:53 +0000326 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 goto out;
328
Thomas Graf6e277ed2012-06-26 23:36:12 +0000329 rep = nlmsg_new(sizeof(struct inet_diag_msg) +
330 sizeof(struct inet_diag_meminfo) +
331 sizeof(struct tcp_info) + 64, GFP_KERNEL);
332 if (!rep) {
333 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 goto out;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000335 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000337 err = sk_diag_fill(sk, rep, req,
Patrick McHardye32123e2013-04-17 06:46:57 +0000338 sk_user_ns(NETLINK_CB(in_skb).sk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000339 NETLINK_CB(in_skb).portid,
Patrick McHardy26932562007-01-31 23:16:40 -0800340 nlh->nlmsg_seq, 0, nlh);
341 if (err < 0) {
342 WARN_ON(err == -EMSGSIZE);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000343 nlmsg_free(rep);
Patrick McHardy26932562007-01-31 23:16:40 -0800344 goto out;
345 }
Eric W. Biederman15e47302012-09-07 20:12:54 +0000346 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300347 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (err > 0)
349 err = 0;
350
351out:
Eric Dumazetc1d607c2013-10-11 08:54:49 -0700352 if (sk)
353 sock_gen_put(sk);
354
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000355out_nosk:
356 return err;
357}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000358EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000359
360static int inet_diag_get_exact(struct sk_buff *in_skb,
361 const struct nlmsghdr *nlh,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700362 const struct inet_diag_req_v2 *req)
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000363{
364 const struct inet_diag_handler *handler;
365 int err;
366
367 handler = inet_diag_lock_handler(req->sdiag_protocol);
368 if (IS_ERR(handler))
369 err = PTR_ERR(handler);
370 else
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000371 err = handler->dump_one(in_skb, nlh, req);
Herbert Xud523a322007-12-03 15:51:25 +1100372 inet_diag_unlock_handler(handler);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 return err;
375}
376
Al Viro9f855292006-09-27 18:44:30 -0700377static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
379 int words = bits >> 5;
380
381 bits &= 0x1f;
382
383 if (words) {
384 if (memcmp(a1, a2, words << 2))
385 return 0;
386 }
387 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700388 __be32 w1, w2;
389 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391 w1 = a1[words];
392 w2 = a2[words];
393
394 mask = htonl((0xffffffff) << (32 - bits));
395
396 if ((w1 ^ w2) & mask)
397 return 0;
398 }
399
400 return 1;
401}
402
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000403static int inet_diag_bc_run(const struct nlattr *_bc,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700404 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405{
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000406 const void *bc = nla_data(_bc);
407 int len = nla_len(_bc);
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 while (len > 0) {
410 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300411 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
413 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300414 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300416 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 yes = 0;
418 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300419 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 yes = entry->sport >= op[1].no;
421 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300422 case INET_DIAG_BC_S_LE:
Roel Kluinb4ced2b2010-01-19 14:12:20 -0800423 yes = entry->sport <= op[1].no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300425 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 yes = entry->dport >= op[1].no;
427 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300428 case INET_DIAG_BC_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 yes = entry->dport <= op[1].no;
430 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300431 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
433 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300434 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300435 case INET_DIAG_BC_D_COND: {
Eric Dumazete31c5e02015-03-10 07:15:53 -0700436 const struct inet_diag_hostcond *cond;
437 const __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Eric Dumazete31c5e02015-03-10 07:15:53 -0700439 cond = (const struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300441 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 entry->sport : entry->dport)) {
443 yes = 0;
444 break;
445 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800446
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300447 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 addr = entry->saddr;
449 else
450 addr = entry->daddr;
451
Neal Cardwellf67caec2012-12-08 19:43:23 +0000452 if (cond->family != AF_UNSPEC &&
453 cond->family != entry->family) {
454 if (entry->family == AF_INET6 &&
455 cond->family == AF_INET) {
456 if (addr[0] == 0 && addr[1] == 0 &&
457 addr[2] == htonl(0xffff) &&
458 bitstring_match(addr + 3,
459 cond->addr,
460 cond->prefix_len))
461 break;
462 }
463 yes = 0;
464 break;
465 }
466
467 if (cond->prefix_len == 0)
468 break;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800469 if (bitstring_match(addr, cond->addr,
470 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 yes = 0;
473 break;
474 }
475 }
476
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800477 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 len -= op->yes;
479 bc += op->yes;
480 } else {
481 len -= op->no;
482 bc += op->no;
483 }
484 }
Eric Dumazeta02cec22010-09-22 20:43:57 +0000485 return len == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486}
487
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000488int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
489{
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000490 struct inet_sock *inet = inet_sk(sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700491 struct inet_diag_entry entry;
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000492
Eric Dumazete31c5e02015-03-10 07:15:53 -0700493 if (!bc)
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000494 return 1;
495
496 entry.family = sk->sk_family;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000497#if IS_ENABLED(CONFIG_IPV6)
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000498 if (entry.family == AF_INET6) {
Eric Dumazetefe42082013-10-03 15:42:29 -0700499 entry.saddr = sk->sk_v6_rcv_saddr.s6_addr32;
500 entry.daddr = sk->sk_v6_daddr.s6_addr32;
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000501 } else
502#endif
503 {
504 entry.saddr = &inet->inet_rcv_saddr;
505 entry.daddr = &inet->inet_daddr;
506 }
507 entry.sport = inet->inet_num;
508 entry.dport = ntohs(inet->inet_dport);
Eric Dumazet49612722015-03-05 10:18:14 -0800509 entry.userlocks = (sk->sk_state != TCP_TIME_WAIT) ? sk->sk_userlocks : 0;
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000510
511 return inet_diag_bc_run(bc, &entry);
512}
513EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515static int valid_cc(const void *bc, int len, int cc)
516{
517 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300518 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520 if (cc > len)
521 return 0;
522 if (cc == len)
523 return 1;
Eric Dumazeteeb14972011-06-17 16:25:39 -0400524 if (op->yes < 4 || op->yes & 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 return 0;
526 len -= op->yes;
527 bc += op->yes;
528 }
529 return 0;
530}
531
Neal Cardwell405c0052012-12-08 19:43:22 +0000532/* Validate an inet_diag_hostcond. */
533static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
534 int *min_len)
535{
Neal Cardwell405c0052012-12-08 19:43:22 +0000536 struct inet_diag_hostcond *cond;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700537 int addr_len;
Neal Cardwell405c0052012-12-08 19:43:22 +0000538
539 /* Check hostcond space. */
540 *min_len += sizeof(struct inet_diag_hostcond);
541 if (len < *min_len)
542 return false;
543 cond = (struct inet_diag_hostcond *)(op + 1);
544
545 /* Check address family and address length. */
546 switch (cond->family) {
547 case AF_UNSPEC:
548 addr_len = 0;
549 break;
550 case AF_INET:
551 addr_len = sizeof(struct in_addr);
552 break;
553 case AF_INET6:
554 addr_len = sizeof(struct in6_addr);
555 break;
556 default:
557 return false;
558 }
559 *min_len += addr_len;
560 if (len < *min_len)
561 return false;
562
563 /* Check prefix length (in bits) vs address length (in bytes). */
564 if (cond->prefix_len > 8 * addr_len)
565 return false;
566
567 return true;
568}
569
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000570/* Validate a port comparison operator. */
Eric Dumazete31c5e02015-03-10 07:15:53 -0700571static bool valid_port_comparison(const struct inet_diag_bc_op *op,
572 int len, int *min_len)
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000573{
574 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
575 *min_len += sizeof(struct inet_diag_bc_op);
576 if (len < *min_len)
577 return false;
578 return true;
579}
580
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300581static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582{
Eric Dumazeteeb14972011-06-17 16:25:39 -0400583 const void *bc = bytecode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 int len = bytecode_len;
585
586 while (len > 0) {
Neal Cardwell405c0052012-12-08 19:43:22 +0000587 int min_len = sizeof(struct inet_diag_bc_op);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700588 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300591 case INET_DIAG_BC_S_COND:
592 case INET_DIAG_BC_D_COND:
Neal Cardwell405c0052012-12-08 19:43:22 +0000593 if (!valid_hostcond(bc, len, &min_len))
594 return -EINVAL;
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000595 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300596 case INET_DIAG_BC_S_GE:
597 case INET_DIAG_BC_S_LE:
598 case INET_DIAG_BC_D_GE:
599 case INET_DIAG_BC_D_LE:
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000600 if (!valid_port_comparison(bc, len, &min_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 return -EINVAL;
602 break;
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000603 case INET_DIAG_BC_AUTO:
604 case INET_DIAG_BC_JMP:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300605 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 break;
607 default:
608 return -EINVAL;
609 }
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000610
611 if (op->code != INET_DIAG_BC_NOP) {
612 if (op->no < min_len || op->no > len + 4 || op->no & 3)
613 return -EINVAL;
614 if (op->no < len &&
615 !valid_cc(bytecode, bytecode_len, len - op->no))
616 return -EINVAL;
617 }
618
Neal Cardwell405c0052012-12-08 19:43:22 +0000619 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
Eric Dumazeteeb14972011-06-17 16:25:39 -0400620 return -EINVAL;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800621 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 len -= op->yes;
623 }
624 return len == 0 ? 0 : -EINVAL;
625}
626
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800627static int inet_csk_diag_dump(struct sock *sk,
628 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000629 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700630 const struct inet_diag_req_v2 *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000631 const struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632{
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000633 if (!inet_diag_bc_sk(bc, sk))
634 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000636 return inet_csk_diag_fill(sk, skb, r,
Patrick McHardye32123e2013-04-17 06:46:57 +0000637 sk_user_ns(NETLINK_CB(cb->skb).sk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000638 NETLINK_CB(cb->skb).portid,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800639 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640}
641
Eric Dumazet49612722015-03-05 10:18:14 -0800642static void twsk_build_assert(void)
643{
644 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
645 offsetof(struct sock, sk_family));
646
647 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
648 offsetof(struct inet_sock, inet_num));
649
650 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
651 offsetof(struct inet_sock, inet_dport));
652
653 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
654 offsetof(struct inet_sock, inet_rcv_saddr));
655
656 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
657 offsetof(struct inet_sock, inet_daddr));
658
659#if IS_ENABLED(CONFIG_IPV6)
660 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
661 offsetof(struct sock, sk_v6_rcv_saddr));
662
663 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
664 offsetof(struct sock, sk_v6_daddr));
665#endif
666}
667
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700668static int inet_twsk_diag_dump(struct sock *sk,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800669 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000670 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700671 const struct inet_diag_req_v2 *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000672 const struct nlattr *bc)
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800673{
Eric Dumazet49612722015-03-05 10:18:14 -0800674 twsk_build_assert();
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700675
Eric Dumazet49612722015-03-05 10:18:14 -0800676 if (!inet_diag_bc_sk(bc, sk))
677 return 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800678
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700679 return inet_twsk_diag_fill(sk, skb, r,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000680 NETLINK_CB(cb->skb).portid,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800681 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
682}
683
Neal Cardwell1c95df82012-12-08 19:43:21 +0000684/* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses
685 * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6.
686 */
Eric Dumazete31c5e02015-03-10 07:15:53 -0700687static void inet_diag_req_addrs(const struct sock *sk,
688 const struct request_sock *req,
689 struct inet_diag_entry *entry)
Neal Cardwell1c95df82012-12-08 19:43:21 +0000690{
Eric Dumazete31c5e02015-03-10 07:15:53 -0700691 const struct inet_request_sock *ireq = inet_rsk(req);
Neal Cardwell1c95df82012-12-08 19:43:21 +0000692
693#if IS_ENABLED(CONFIG_IPV6)
694 if (sk->sk_family == AF_INET6) {
695 if (req->rsk_ops->family == AF_INET6) {
Eric Dumazet634fb9792013-10-09 15:21:29 -0700696 entry->saddr = ireq->ir_v6_loc_addr.s6_addr32;
697 entry->daddr = ireq->ir_v6_rmt_addr.s6_addr32;
Neal Cardwell1c95df82012-12-08 19:43:21 +0000698 } else if (req->rsk_ops->family == AF_INET) {
Eric Dumazet634fb9792013-10-09 15:21:29 -0700699 ipv6_addr_set_v4mapped(ireq->ir_loc_addr,
Neal Cardwell1c95df82012-12-08 19:43:21 +0000700 &entry->saddr_storage);
Eric Dumazet634fb9792013-10-09 15:21:29 -0700701 ipv6_addr_set_v4mapped(ireq->ir_rmt_addr,
Neal Cardwell1c95df82012-12-08 19:43:21 +0000702 &entry->daddr_storage);
703 entry->saddr = entry->saddr_storage.s6_addr32;
704 entry->daddr = entry->daddr_storage.s6_addr32;
705 }
706 } else
707#endif
708 {
Eric Dumazet634fb9792013-10-09 15:21:29 -0700709 entry->saddr = &ireq->ir_loc_addr;
710 entry->daddr = &ireq->ir_rmt_addr;
Neal Cardwell1c95df82012-12-08 19:43:21 +0000711 }
712}
713
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300714static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600715 struct request_sock *req,
716 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000717 u32 portid, u32 seq,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800718 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719{
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700720 const struct inet_request_sock *ireq = inet_rsk(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300722 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 struct nlmsghdr *nlh;
724 long tmo;
725
Eric W. Biederman15e47302012-09-07 20:12:54 +0000726 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +0000727 NLM_F_MULTI);
728 if (!nlh)
729 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Thomas Graf6e277ed2012-06-26 23:36:12 +0000731 r = nlmsg_data(nlh);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300732 r->idiag_family = sk->sk_family;
733 r->idiag_state = TCP_SYN_RECV;
734 r->idiag_timer = 1;
Eric Dumazete6c022a2012-10-27 23:16:46 +0000735 r->idiag_retrans = req->num_retrans;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300737 r->id.idiag_if = sk->sk_bound_dev_if;
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700738
739 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
740 offsetof(struct sock, sk_cookie));
741 sock_diag_save_cookie((struct sock *)ireq, r->id.idiag_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742
743 tmo = req->expires - jiffies;
744 if (tmo < 0)
745 tmo = 0;
746
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000747 r->id.idiag_sport = inet->inet_sport;
Eric Dumazet634fb9792013-10-09 15:21:29 -0700748 r->id.idiag_dport = ireq->ir_rmt_port;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100749
750 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
751 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
752
Eric Dumazet634fb9792013-10-09 15:21:29 -0700753 r->id.idiag_src[0] = ireq->ir_loc_addr;
754 r->id.idiag_dst[0] = ireq->ir_rmt_addr;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100755
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300756 r->idiag_expires = jiffies_to_msecs(tmo);
757 r->idiag_rqueue = 0;
758 r->idiag_wqueue = 0;
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600759 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300760 r->idiag_inode = 0;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000761#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300762 if (r->idiag_family == AF_INET6) {
Neal Cardwell1c95df82012-12-08 19:43:21 +0000763 struct inet_diag_entry entry;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700764
Neal Cardwell1c95df82012-12-08 19:43:21 +0000765 inet_diag_req_addrs(sk, req, &entry);
766 memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr));
767 memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 }
769#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
Johannes Berg053c0952015-01-16 22:09:00 +0100771 nlmsg_end(skb, nlh);
772 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773}
774
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300775static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000776 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700777 const struct inet_diag_req_v2 *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000778 const struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700780 struct inet_connection_sock *icsk = inet_csk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 struct inet_sock *inet = inet_sk(sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700782 struct inet_diag_entry entry;
783 int j, s_j, reqnum, s_reqnum;
784 struct listen_sock *lopt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 int err = 0;
786
787 s_j = cb->args[3];
788 s_reqnum = cb->args[4];
789
790 if (s_j > 0)
791 s_j--;
792
793 entry.family = sk->sk_family;
794
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700795 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700797 lopt = icsk->icsk_accept_queue.listen_opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 if (!lopt || !lopt->qlen)
799 goto out;
800
Eric Dumazete31c5e02015-03-10 07:15:53 -0700801 if (bc) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000802 entry.sport = inet->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 entry.userlocks = sk->sk_userlocks;
804 }
805
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300806 for (j = s_j; j < lopt->nr_table_entries; j++) {
Arnaldo Carvalho de Melo60236fd2005-06-18 22:47:21 -0700807 struct request_sock *req, *head = lopt->syn_table[j];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
809 reqnum = 0;
810 for (req = head; req; reqnum++, req = req->dl_next) {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700811 struct inet_request_sock *ireq = inet_rsk(req);
812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 if (reqnum < s_reqnum)
814 continue;
Eric Dumazet634fb9792013-10-09 15:21:29 -0700815 if (r->id.idiag_dport != ireq->ir_rmt_port &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300816 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 continue;
818
819 if (bc) {
Neal Cardwell1c95df82012-12-08 19:43:21 +0000820 inet_diag_req_addrs(sk, req, &entry);
Eric Dumazet634fb9792013-10-09 15:21:29 -0700821 entry.dport = ntohs(ireq->ir_rmt_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000823 if (!inet_diag_bc_run(bc, &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 continue;
825 }
826
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300827 err = inet_diag_fill_req(skb, sk, req,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700828 sk_user_ns(NETLINK_CB(cb->skb).sk),
829 NETLINK_CB(cb->skb).portid,
830 cb->nlh->nlmsg_seq, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 if (err < 0) {
832 cb->args[3] = j + 1;
833 cb->args[4] = reqnum;
834 goto out;
835 }
836 }
837
838 s_reqnum = 0;
839 }
840
841out:
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700842 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
844 return err;
845}
846
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000847void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700848 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700849 const struct inet_diag_req_v2 *r, struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850{
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000851 struct net *net = sock_net(skb->sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700852 int i, num, s_i, s_num;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800853
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 s_i = cb->args[1];
855 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 if (cb->args[0] == 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300858 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300860
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700861 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800862 struct inet_listen_hashbucket *ilb;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700863 struct hlist_nulls_node *node;
864 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865
866 num = 0;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800867 ilb = &hashinfo->listening_hash[i];
868 spin_lock_bh(&ilb->lock);
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800869 sk_nulls_for_each(sk, node, &ilb->head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 struct inet_sock *inet = inet_sk(sk);
871
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000872 if (!net_eq(sock_net(sk), net))
873 continue;
874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 if (num < s_num) {
876 num++;
877 continue;
878 }
879
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000880 if (r->sdiag_family != AF_UNSPEC &&
Eric Dumazete31c5e02015-03-10 07:15:53 -0700881 sk->sk_family != r->sdiag_family)
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000882 goto next_listen;
883
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000884 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300885 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 goto next_listen;
887
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300888 if (!(r->idiag_states & TCPF_LISTEN) ||
889 r->id.idiag_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 cb->args[3] > 0)
891 goto syn_recv;
892
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000893 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800894 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 goto done;
896 }
897
898syn_recv:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300899 if (!(r->idiag_states & TCPF_SYN_RECV))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 goto next_listen;
901
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000902 if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800903 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 goto done;
905 }
906
907next_listen:
908 cb->args[3] = 0;
909 cb->args[4] = 0;
910 ++num;
911 }
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800912 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
914 s_num = 0;
915 cb->args[3] = 0;
916 cb->args[4] = 0;
917 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918skip_listen_ht:
919 cb->args[0] = 1;
920 s_i = num = s_num = 0;
921 }
922
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300923 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000924 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
Eric Dumazetf373b532009-10-09 00:16:19 +0000926 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300927 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
David S. Miller7e3aab42008-11-21 16:39:19 -0800928 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800929 struct hlist_nulls_node *node;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700930 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
Andi Kleen6be547a2008-08-28 01:09:54 -0700932 num = 0;
933
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700934 if (hlist_nulls_empty(&head->chain))
Andi Kleen6be547a2008-08-28 01:09:54 -0700935 continue;
936
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 if (i > s_i)
938 s_num = 0;
939
David S. Miller7e3aab42008-11-21 16:39:19 -0800940 spin_lock_bh(lock);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800941 sk_nulls_for_each(sk, node, &head->chain) {
Eric Dumazete31c5e02015-03-10 07:15:53 -0700942 int state, res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000944 if (!net_eq(sock_net(sk), net))
945 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 if (num < s_num)
947 goto next_normal;
Neal Cardwell70315d22014-01-10 15:34:45 -0500948 state = (sk->sk_state == TCP_TIME_WAIT) ?
949 inet_twsk(sk)->tw_substate : sk->sk_state;
950 if (!(r->idiag_states & (1 << state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 goto next_normal;
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000952 if (r->sdiag_family != AF_UNSPEC &&
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700953 sk->sk_family != r->sdiag_family)
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000954 goto next_normal;
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700955 if (r->id.idiag_sport != htons(sk->sk_num) &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300956 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 goto next_normal;
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700958 if (r->id.idiag_dport != sk->sk_dport &&
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800959 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 goto next_normal;
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700961 if (sk->sk_state == TCP_TIME_WAIT)
962 res = inet_twsk_diag_dump(sk, skb, cb, r, bc);
963 else
964 res = inet_csk_diag_dump(sk, skb, cb, r, bc);
965 if (res < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800966 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 goto done;
968 }
969next_normal:
970 ++num;
971 }
972
David S. Miller7e3aab42008-11-21 16:39:19 -0800973 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 }
975
976done:
977 cb->args[1] = i;
978 cb->args[2] = num;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000979out:
980 ;
981}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000982EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000983
984static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700985 const struct inet_diag_req_v2 *r,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700986 struct nlattr *bc)
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000987{
988 const struct inet_diag_handler *handler;
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000989 int err = 0;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000990
991 handler = inet_diag_lock_handler(r->sdiag_protocol);
992 if (!IS_ERR(handler))
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000993 handler->dump(skb, cb, r, bc);
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000994 else
995 err = PTR_ERR(handler);
Herbert Xud523a322007-12-03 15:51:25 +1100996 inet_diag_unlock_handler(handler);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000997
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000998 return err ? : skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999}
1000
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001001static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
1002{
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001003 int hdrlen = sizeof(struct inet_diag_req_v2);
Eric Dumazete31c5e02015-03-10 07:15:53 -07001004 struct nlattr *bc = NULL;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001005
1006 if (nlmsg_attrlen(cb->nlh, hdrlen))
1007 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1008
David S. Millerd1063522012-06-26 21:28:54 -07001009 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001010}
1011
Eric Dumazete31c5e02015-03-10 07:15:53 -07001012static int inet_diag_type2proto(int type)
Pavel Emelyanova029fe22011-12-06 07:59:32 +00001013{
1014 switch (type) {
1015 case TCPDIAG_GETSOCK:
1016 return IPPROTO_TCP;
1017 case DCCPDIAG_GETSOCK:
1018 return IPPROTO_DCCP;
1019 default:
1020 return 0;
1021 }
1022}
1023
Eric Dumazete31c5e02015-03-10 07:15:53 -07001024static int inet_diag_dump_compat(struct sk_buff *skb,
1025 struct netlink_callback *cb)
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001026{
David S. Millerd1063522012-06-26 21:28:54 -07001027 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
Eric Dumazete31c5e02015-03-10 07:15:53 -07001028 int hdrlen = sizeof(struct inet_diag_req);
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001029 struct inet_diag_req_v2 req;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001030 struct nlattr *bc = NULL;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001031
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +00001032 req.sdiag_family = AF_UNSPEC; /* compatibility */
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001033 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1034 req.idiag_ext = rc->idiag_ext;
1035 req.idiag_states = rc->idiag_states;
1036 req.id = rc->id;
1037
1038 if (nlmsg_attrlen(cb->nlh, hdrlen))
1039 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1040
1041 return __inet_diag_dump(skb, cb, &req, bc);
1042}
1043
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001044static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
Eric Dumazete31c5e02015-03-10 07:15:53 -07001045 const struct nlmsghdr *nlh)
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001046{
David S. Millerd1063522012-06-26 21:28:54 -07001047 struct inet_diag_req *rc = nlmsg_data(nlh);
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001048 struct inet_diag_req_v2 req;
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001049
1050 req.sdiag_family = rc->idiag_family;
1051 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1052 req.idiag_ext = rc->idiag_ext;
1053 req.idiag_states = rc->idiag_states;
1054 req.id = rc->id;
1055
1056 return inet_diag_get_exact(in_skb, nlh, &req);
1057}
1058
Pavel Emelyanov8d341722011-12-06 07:57:06 +00001059static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060{
Pavel Emelyanov3b09c842012-01-10 22:37:26 +00001061 int hdrlen = sizeof(struct inet_diag_req);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001062 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063
Thomas Grafead592b2007-03-22 23:30:35 -07001064 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1065 nlmsg_len(nlh) < hdrlen)
1066 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067
David S. Millerb8f3ab42011-01-18 12:40:38 -08001068 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -07001069 if (nlmsg_attrlen(nlh, hdrlen)) {
1070 struct nlattr *attr;
1071
1072 attr = nlmsg_find_attr(nlh, hdrlen,
1073 INET_DIAG_REQ_BYTECODE);
Eric Dumazete31c5e02015-03-10 07:15:53 -07001074 if (!attr ||
Thomas Grafead592b2007-03-22 23:30:35 -07001075 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1076 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1077 return -EINVAL;
1078 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001079 {
1080 struct netlink_dump_control c = {
1081 .dump = inet_diag_dump_compat,
1082 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001083 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001084 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 }
Thomas Grafead592b2007-03-22 23:30:35 -07001086
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001087 return inet_diag_get_exact_compat(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088}
1089
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001090static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
1091{
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001092 int hdrlen = sizeof(struct inet_diag_req_v2);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001093 struct net *net = sock_net(skb->sk);
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001094
1095 if (nlmsg_len(h) < hdrlen)
1096 return -EINVAL;
1097
1098 if (h->nlmsg_flags & NLM_F_DUMP) {
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001099 if (nlmsg_attrlen(h, hdrlen)) {
1100 struct nlattr *attr;
Eric Dumazete31c5e02015-03-10 07:15:53 -07001101
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001102 attr = nlmsg_find_attr(h, hdrlen,
1103 INET_DIAG_REQ_BYTECODE);
Eric Dumazete31c5e02015-03-10 07:15:53 -07001104 if (!attr ||
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001105 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1106 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1107 return -EINVAL;
1108 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001109 {
1110 struct netlink_dump_control c = {
1111 .dump = inet_diag_dump,
1112 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001113 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001114 }
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001115 }
1116
David S. Millerd1063522012-06-26 21:28:54 -07001117 return inet_diag_get_exact(skb, h, nlmsg_data(h));
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001118}
1119
Shan Wei8dcf01f2012-04-24 18:21:07 +00001120static const struct sock_diag_handler inet_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001121 .family = AF_INET,
1122 .dump = inet_diag_handler_dump,
1123};
1124
Shan Wei8dcf01f2012-04-24 18:21:07 +00001125static const struct sock_diag_handler inet6_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001126 .family = AF_INET6,
1127 .dump = inet_diag_handler_dump,
1128};
1129
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001130int inet_diag_register(const struct inet_diag_handler *h)
1131{
1132 const __u16 type = h->idiag_type;
1133 int err = -EINVAL;
1134
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001135 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001136 goto out;
1137
Herbert Xud523a322007-12-03 15:51:25 +11001138 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001139 err = -EEXIST;
Eric Dumazete31c5e02015-03-10 07:15:53 -07001140 if (!inet_diag_table[type]) {
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001141 inet_diag_table[type] = h;
1142 err = 0;
1143 }
Herbert Xud523a322007-12-03 15:51:25 +11001144 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001145out:
1146 return err;
1147}
1148EXPORT_SYMBOL_GPL(inet_diag_register);
1149
1150void inet_diag_unregister(const struct inet_diag_handler *h)
1151{
1152 const __u16 type = h->idiag_type;
1153
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001154 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001155 return;
1156
Herbert Xud523a322007-12-03 15:51:25 +11001157 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001158 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +11001159 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001160}
1161EXPORT_SYMBOL_GPL(inet_diag_unregister);
1162
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001163static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001165 const int inet_diag_table_size = (IPPROTO_MAX *
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001166 sizeof(struct inet_diag_handler *));
1167 int err = -ENOMEM;
1168
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001169 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001170 if (!inet_diag_table)
1171 goto out;
1172
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001173 err = sock_diag_register(&inet_diag_handler);
1174 if (err)
1175 goto out_free_nl;
1176
1177 err = sock_diag_register(&inet6_diag_handler);
1178 if (err)
1179 goto out_free_inet;
1180
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001181 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001182out:
1183 return err;
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001184
1185out_free_inet:
1186 sock_diag_unregister(&inet_diag_handler);
1187out_free_nl:
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001188 kfree(inet_diag_table);
1189 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190}
1191
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001192static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193{
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001194 sock_diag_unregister(&inet6_diag_handler);
1195 sock_diag_unregister(&inet_diag_handler);
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001196 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001197 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198}
1199
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001200module_init(inet_diag_init);
1201module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202MODULE_LICENSE("GPL");
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +00001203MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1204MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);